• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to a sampling device (2) with a sampling probe attachment (1), a plurality of support arms (4) being arranged on the sampling probe attachment (1), each of which is at a distance (r1, r2) from the radial center of the sampling probe attachment (1). define radially most distant points (P1, P2), the plurality of support arms (4) in a first position define a closing position (S) in which the distances (r1, r2) correspond to closing distances (rS1, rS2), and the plurality of support arms (4) define an opening position (O) in a second position, in which the distances (r1, r2) correspond to opening distances (rO1, rO2). The sum of the closing distances (rS1, rS2) is smaller than the sum of the opening distances (rO1, rO2), an adjustment device (6) also being provided, which is designed to remove the plurality of support arms (4) from the opening position (O) in the closed position (S), or vice versa. The invention also relates to a method for extracting exhaust gas from an exhaust pipe (11) of an internal combustion engine.
    公开号:AT521370A4
    申请号:T50530/2018
    申请日:2018-06-27
    公开日:2020-01-15
    发明作者:Roveda Davide；Bogdan Valentan Dr
    申请人:Avl List Gmbh；
    IPC主号:
    专利说明:

    Summary
    The invention relates to a sampling device (2) with a sampling probe attachment (1), a plurality of support arms (4) being arranged on the sampling probe attachment (1), each of which is at a distance (r1, r2) from the radial center of the sampling probe attachment (1). define radially most distant points (P1, P2), the plurality of support arms (4) in a first position define a closing position (S) in which the distances (r1, r2) correspond to closing distances (rS1, rS2), and the plurality of support arms (4) define an opening position (O) in a second position, in which the distances (r1, r2) correspond to opening distances (rO1, rO2). The sum of the closing distances (rS1, rS2) is smaller than the sum of the opening distances (rO1, rO2), an adjustment device (6) also being provided, which is designed to remove the plurality of support arms (4) from the opening position (O) in the closed position (S), or vice versa. The invention also relates to a method for extracting exhaust gas from an exhaust pipe (11) of an internal combustion engine.
    Fig. 4
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    AV-4017 AT
    Sampling device
    The present invention relates to a sampling device with a sampling probe attachment and a method for extracting exhaust gas from an exhaust pipe of an internal combustion engine.
    Evaluation devices, e.g. for mobile applications as well as on test benches or in workshops Particle measuring devices used, e.g. the number, size, mass of particles in the exhaust gas of an internal combustion engine are to be evaluated or analyzed. Such analyzes are required, for example, in the course of regular inspections of internal combustion engines in use, for example in the context of the periodic inspection of motor vehicles. Of course, corresponding exhaust gas analyzes are also of great importance in the course of the development of internal combustion engines.
    Evaluation devices that are used in this context usually have a corresponding sampling probe, via which exhaust gas is removed from the exhaust line or the exhaust of the internal combustion engine. The sampling probe is usually inserted and fixed in the exhaust. The sampling probe can be made in one piece with a measuring line or positioned as a sampling probe attachment on the measuring line. The extracted exhaust gas is subsequently fed to a conditioning device or corresponding measuring devices which, for example, determine the chemical composition of the exhaust gas or the contamination with different particles. Especially for mobile applications where exhaust gas is removed from the moving vehicle, the sampling probe must also be able to be securely fixed in the exhaust.
    In this context, it is also crucial to position the sampling probe as far as possible from the inner pipe wall of the exhaust pipe or in the area of the longitudinal axis of the exhaust pipe in order to keep negative influences of the inner pipe wall of the exhaust pipe on the exhaust gas extraction as small as possible.
    In this context, EP 2 428 790 A1 shows an exhaust probe pipe, at the front end of which spacers are provided in order to ensure a minimum distance of the exhaust probe pipe from the inner wall of an exhaust pipe, the rear end of the exhaust probe pipe being clamped onto the exhaust end.
    Furthermore, DE 86 12 164 U1 shows a device for exhaust gas measurements on vehicle exhaust pipes, in which two centering guides arranged at a distance from one another are provided on a probe for exhaust gas extraction. These are indicated by -12/18
    AV-4017 AT
    Spring elements or spring arms realized, which, based on an insertion direction of the
    Probe, spread obliquely backwards.
    A disadvantage is that any centering devices in the prior art basically form a unit with the corresponding sampling probes. Retrofitting existing sampling probes with an advantageous centering device is not provided. It is also not intended to replace the centering device, in the event that the sampling probe is to be used for a wide variety of exhaust tailpipes with different inside diameters. For spring elements such as those provided in DE 86 12 164 U1, there is only an optimal cross section or an optimal narrow cross-sectional area of an exhaust pipe. The insertion is not problematic, however, the problem-free removal of the probe is heavily dependent on the cross section or inner diameter of the exhaust pipe. If the spreading angle of the spring elements shown is too large, there is a certain clamping effect and a sampling probe with a centering device in this design cannot be removed from the exhaust pipe or can only be removed with difficulty.
    AT 514 009 A2 in turn has a separate head piece connected to an axial end of the sampling probe, at least three radially projecting support elements being arranged on the separate head piece. Using such a separate head piece, existing sampling probes can be retrofitted accordingly and positioned with the star-shaped support elements. Using different head pieces, a sampling probe can be adapted to exhaust pipes with different inner diameters. However, the head pieces have to be changed here, and the construction with the thin support elements is fragile and can cause problems, particularly when removing them from the exhaust pipe.
    The object of the present invention is to provide a sampling device with a sampling probe attachment that can be used for different exhaust pipes of different internal diameters or cross sections and enables better centering or safe positioning.
    This object is achieved according to the invention by a sampling device mentioned at the outset in that a plurality of support arms are arranged on the removal probe attachment, each defining radially most distant points at a distance from the radial center of the removal probe attachment, the plurality of support arms defining a closed position in a first position, in which the distances correspond to closing distances, the plurality of support arms in a second position define an opening position in which the distances correspond to opening distances, the sum of the closing distances being smaller than the sum of the opening distances. It is an adjusting vor3 / 18 2 '
    AV-4017 AT, which is designed to support the plurality of support arms from the open position
    Closing position, or vice versa. By the defined opening position and
    On the one hand, the sampling probe attachment of the sampling device can be easily positioned and centered in the closed position. On the other hand, the sampling probe attachment can also be securely fixed in the exhaust of an internal combustion engine.
    This object is further achieved by a method for exhaust gas extraction from an exhaust pipe of an internal combustion engine, wherein a plurality of support arms of a sampling device, each of which defines the most distant points at a distance from the center of a sampling probe attachment, into a closed position, in which the distances are closed distances are brought, the sampling device is inserted into the exhaust pipe, the plurality of support arms are brought into an opening position in which the distances correspond to opening distances, the sum of the closing distances being smaller than the sum of the opening distances. An exhaust gas extraction process is started via the removal probe attachment and, after the removal process has been completed, the plurality of support arms are brought into a second closing position in which the distances correspond to second closing distances, the sum of which is smaller than the sum of the opening distances. The sampling device is then removed from the exhaust pipe. The closed position advantageously corresponds to the second closed position.
    A great advantage of the invention is the possible use with different exhaust pipes with different inside diameters or cross sections, without having to replace parts. Only the opening distances, or the sum thereof, have to be adapted to the inside diameter of the respective exhaust pipe. Of course, the closing distances, or more precisely the sum thereof, must be selected in such a way that the sampling probe attachment can also be inserted or removed in the closed state.
    This means that the circumference of the support arms spanned by the closed state or the radial extent of the sampling probe attachment in the closed state must be smaller than the internal cross-sectional area of the exhaust pipe. The most distant points are usually on a circle, the center of which describes the center of the sampling probe attachment, in particular in the open position, since in this position there should be contact with the inner surface of the exhaust pipe. A first number of support arms can be designed to be movable, i.e. have a variable distance and a second number can be fixed, i.e. have a fixed distance. Of course, all support arms can advantageously also be designed to be movable. It is crucial, however, that the sum of the distances between the plurality of support arms in the open position is greater than the sum of the distances in the closed position. So that does not mean that the opening distance of each
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    AV-4017 AT individual support arm in the open position must be larger than the closing distance of this support arm in the closed position.
    If a support arm has no variable distance, the closing distance for this support arm is equal to the opening distance, the sum of the closing distances of all support arms and the opening distances of all support arms is decisive. It would therefore be conceivable that individual opening distances of certain support arms are smaller than the closing distances of these support arms, as long as the condition of the sum of the opening distances greater than the sum of the closing distances is fulfilled.
    Advantageously, the plurality of support arms are each rotatably supported via an axis from the open position to the closed position, or vice versa. This can be done via one shaft each, it is also possible, for example, to fasten the support arms rotatably to the sampling probe attachment using screws. The support arms are thus designed as extenders, the axis can also be viewed as a cam and the support arms as cam members.
    Advantageously, two support arms are rotatably supported by a common axis from the open position to the closed position, or vice versa, the axis also being able to be represented by a shaft, a screw, etc. If the points of these two support arms are at the same distance from the center, the axis is thus in the radial center of the sampling probe attachment. It should be noted that a rigid support arm on the sampling probe attachment is also regarded as a support arm, i.e. that, for example, in the presence of a movable support arm and a rigid support arm according to the invention, there are two support arms.
    Advantageously, a stop element is provided on each of the plurality of support arms, which preferably rests on the sampling probe attachment in the open position or in the closed position. An opening position and / or closing position is thus mechanically defined in the latter case. In any case, the stopping elements prevent the support arms from being overturned to an undesired position (e.g. beyond the closing position and / or the opening position).
    Another embodiment provides that the plurality of support arms are each attached to the side of the sampling probe attachment. This means that the support arms are not connected via a common axis, but are supported via individual axes. This can be particularly advantageous if the support arms are designed as a flexible and adjustable spring element, since these spring arms laterally, i.e. can be attached radially to the outer wall of the sampling probe attachment.
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    AV-4017 AT
    There may be an even number of support arms, which are attached in pairs diametrically to the sampling probe attachment. This is a particularly good and precise positioning in the cross section of an exhaust pipe, e.g. in its center, possible.
    The adjusting device can have at least one spring element which is designed to hold the plurality of support arms in the open position or in the closed position in a relaxed state, the adjusting device having a tensioning device which, when actuated, the spring element in a tensioned state, and thus the plurality of support arms brings in the closed position or the open position. This means that either the opening position or the closing position is predetermined by the spring element, possibly in combination with stop elements. If the spring force of the spring element brings the sampling probe attachment into the opening position, the opening position can of course also be determined by the mechanical contact with the inside diameter of an exhaust pipe.
    i.e. that the support arms get into a position that would span a larger diameter than the opening position without being limited by the inner diameter of an exhaust pipe. In this case, the removal probe attachment is secured radially and axially against slipping by the spring force of the spring element after tensioning the spring element by the tensioning device, then inserting it into an exhaust pipe and relaxing the spring element.
    The number of spring elements is advantageously designed as leg springs, which enables a particularly simple construction of the sampling device. There can be one leg spring per support arm. Of course, a spring element, e.g. a leg spring can be assigned to several support arms and thus hold in the relaxed state in the open position or in the closed position.
    In a further variant, each support arm is in engagement with one leg of the respective leg spring via a fastening element and the removal probe attachment is in engagement with the respective other legs of the leg spring via further attachment elements in order to allow the spring force to act between the removal probe attachment and the support arms.
    The tensioning device can be designed as a stiff wire, alternatively pneumatic, hydraulic, etc. tensioning devices are also conceivable. The entire adjusting device can also be operated pneumatically, hydraulically, with elastomers, etc. instead of or in addition to the spring element.
    At least part of the surface of the plurality of support arms, preferably at least the surface facing outwards in the closed state, can have a non-smooth surface structure. This enables a better hold on the inside of the exhaust pipe.
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    The present invention is explained in more detail below with reference to FIGS. 1 to 3, which show exemplary, schematic and non-limiting advantageous embodiments of the invention. It shows
    1a is a top view of a sampling device in the closed position,
    1b is a side view of a sampling device in the closed position,
    1c a sampling device in the closed position in an oblique crack, FIG. 2a a sampling device in the opening position in a plan view, FIG. 2b a sampling device in the opening position in a side view, FIG. 2c a sampling device in the opening position in an oblique tear, FIG. 3 various configurations of the surface structure of the plurality of support arms, and FIG. 4 shows a sampling device in the closed position on an exhaust pipe.
    Figures 1a, 1b, 1c show an advantageous embodiment of the sampling device 2 according to the invention in a closed position S in three views. A sampling probe attachment 1 serves as the base body, a plurality (here two) radially protruding support arms 4 being arranged in the sampling device 2 on the sampling probe attachment 1. These support arms 4 each define points P1, P2 that are the farthest distance radially at a distance r1, r2 from the radial center of the sampling probe attachment 1, or the sampling device 2.
    In the closed position S according to FIG. 1, the support arms 4 are positioned such that the distances r1, r2 correspond to the closing distances rS1, rS2. In contrast, the support arms 4 are positioned in an opening position O such that the distances r1, r2 correspond to opening distances rO1, rO2. The sum of the closing distances rS1, rS2 is smaller than the sum of the opening distances rO1, rO2.
    A sampling device 2 in the open position is shown in FIGS. 2a, 2b, 2c. In the illustrated embodiment, two support arms 4 are provided, which have a larger circumference, e.g. span a larger circle than in the closed position S. The points P1, P2 on the support arms 4, which are the farthest radially from the center of the sampling probe attachment 1, do not have to be the radially most distant points P1, P2 on the support arms 4 in the open position match in the closed position S. It can be seen in particular in FIGS. 1 and 2 that the radially furthest points P1, P2 in the open position O do not correspond to the radially furthest points P1, P2 in the closed position S.
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    In order to avoid any incorrect measurements, it is important to properly position the sampling device 2, in particular the sampling probe attachment 1, for example within an exhaust pipe 11, as is shown schematically in FIG.
    If the positioning is not carried out properly, the sampling probe attachment 1 can come to rest on the inner wall of the exhaust pipe 11 or too close to it. This can subsequently lead to particles attached to this inner wall becoming detached, getting into the removal probe attachment 1 and thereby falsifying a measurement result. Usually, the aim is to position the sampling probe attachment 1 as centrally as possible in an exhaust pipe 11. For this reason, the sampling device 2 with the sampling probe attachment 1 is inserted into the exhaust pipe 11 in the closed position S, whereupon the sampling device 2 is brought into the opening position O via an adjustment device 6 after the desired placement in the exhaust pipe 11, for example to center the sampling probe attachment 11 ,
    4 shows a sampling device 2 in the closed position, as a result of which it can easily be inserted into an exhaust pipe 11. In the closed position S (before insertion into the exhaust pipe 11) the radial expansion of the sampling probe attachment 1 with the support arms 4 is of course smaller than the inner diameter d of the exhaust pipe 11. When the sampling device 2 in the exhaust pipe 11 is in its end position, it is in the Opening position O brought. In the opening position O in the exhaust pipe 11, the support arms 4 contact the inner wall of the exhaust pipe 11, as a result of which the sampling device 2 or the sampling probe attachment 1 are centered. At the same time, the sampling device 2 can be fixed in the exhaust pipe 11 via the acting clamping forces. The closing distances rS1, rS2 of the support arms 4 are to be selected so that in the closed position S there is a radial diameter of the sampling probe attachment 1 that is smaller than the inner diameter d of the exhaust pipe 11, so that the sampling probe attachment 1 is positioned inside the exhaust pipe 11 can. The adjustment device 6 present in the sampling device 2 is designed such that the support arms 4 can be brought into the open position O or into the closed position S. The support arms 4 are accordingly adjustable by means of the adjusting device 6 with regard to their radial distance (the points P1, P2) from the center of the sampling probe attachment 1.
    In the embodiment shown in FIGS. 1-4, the plurality of support arms 4 are each rotatably supported via an axis 9 from the open position O to the closed position S, or vice versa. The axis 9 is essentially normal to the longitudinal axis or to the direction of insertion of the sampling device 2 or of the sampling probe attachment 1. In the exemplary embodiment shown, exactly two support arms 4 are provided which move from the open position O to the closed position S via a common axis 9 , or vice versa, are rotatably mounted.
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    AV-4017 AT
    The design of the sampling device 2 according to FIGS. 1, 2 and 4 shows support arms 4, in which a part of the surface, here the surface facing outwards, has a non-smooth surface structure. This is advantageous in order to achieve a better hold on the inside of the exhaust pipe 11. 3a and 3b show sampling devices 2 in the open position O with further possible non-smooth types of surface structures of the support arms 4, whereas FIG. 3c shows an embodiment with a smooth surface of the support arms 4.
    Ideally, the support arms 4 are arranged at regular intervals in the circumferential direction of the sampling probe attachment 1. Advantageously, an even number of support arms 4 can be attached diametrically to the removal probe attachment 1 in pairs. The support arms 4, particularly in the presence of an odd number of support arms 4, can also not be attached diametrically, for example at an angle of 3607 number of the support arms, or in a further manner which is considered by the person skilled in the art to be relevant.
    Contrary to the embodiment shown in FIGS. 1-4, the support arms 4 can of course also be attached radially laterally offset on the removal probe attachment 1, i.e. without a common axis and without touching each other.
    The exhaust gas sample, which is taken from the sampling probe attachment 1 of the sampling device 2, is usually fed via a measuring line 8 to an evaluation device (not shown in the figures, as shown in FIG. 4). In such an evaluation device, the exhaust gas sample is measured, for example, for its chemical composition and size of the particles contained, particle concentration, etc. This list is, however, only to be seen as an example, since a wide variety of measured variables or their measured values may be of interest.
    In its intended use, the part of the sampling device or the sampling probe attachment 1 is pushed into the exhaust pipe 11 of an internal combustion engine in the closed position S (FIG. 4) and brought into the open position. The support arms 4 are only in contact with the inside of the exhaust pipe 11 in the open position O. An exhaust gas extraction process is then started and exhaust gas is removed in the meantime via the extraction probe attachment 1. After completion of the exhaust gas removal process, the plurality of support arms 4 are brought into a second closing position S ’, in which the distances r1, r2 correspond to second closing distances rST, rS2’. The sampling device 2 is then removed from the exhaust pipe 11.
    The sum of the second closing distances rST, rS2 'must of course, analogous to the sum of the closing positions rS1, rS2, be smaller than the sum of the opening distances rO1, rO2, advantageously the second closing position S' corresponds to the closing position S, so that the second closing distances rST, rS2 ' Closing distances rS1, rS2 correspond. That means -89/18
    AV-4017 AT the sampling probe attachment 1 is inserted and removed in the same closing position S (= S j) in the exhaust pipe 11. For this purpose it can be advantageous if positions, for example the closing position S and the opening position, are located on the sampling device 2, for example via corresponding stops For this purpose, a stop element 41 can be provided, for example, on the support arms 4, as shown in FIGS. 1-4, which in the maximum permissible spread position of the support arms 4 on the sampling probe attachment 1. This prevents the support arms 4 from opening or over-tightening due to the spring force of the spring element 5. This permissible spread position of the support arms 4 can correspond to the opening position O.
    By means of the device according to the invention, or the method according to the invention, the sampling probe attachment 1 can be centered, fixed or positioned securely in the exhaust pipe 11 in a wide variety of sampling situations.
    As also shown in FIGS. 1 to 4, all support arms 4 can be designed to be movable. Basically, however, it is sufficient if only one support arm 4 is designed to be correspondingly movable and the remaining support arms 4 are, for example, rigid, i.e. are formed at a constant distance from the center of the sampling probe attachment 1. In the closed position S, for example, the distance r1 of the movable support arm 4 is in the closing distance rS1 from the center of the sampling probe attachment 1.
    In the closed position S, the sum of the distances r1, r2 corresponds to the sum of the closing distances rS1, rS2. A change in the distance r1 to the opening distance rO1 (in this case an increase in the distance r1, since the remaining support arms 4 have a constant distance r2) by the adjusting device 6 causes a change in the sum of the distances r1, r2 of the support arms 4 to the Sum of the opening distances rO1, rO2 (which must be greater than the sum of the closing distances rS1, rS2). The sampling probe attachment 1 can thus be inserted into an exhaust pipe 11 in the closed state S. The person skilled in the art can, at his own discretion, execute any number of support arms 4 with a variable distance r1, r2, as long as the conditions mentioned for the sum of the closing distances rS1, rS2 and opening distances rO1, rO2 are met.
    The support arms are designed to be curved, as shown in the figures, the bending of the support elements 4 not necessarily resulting in a continuously curved shape, which is correspondingly symmetrically shaped in its bend. Of course, the bend can also be approximated by a polygon and an asymmetrical shape is also conceivable. The adjustment device 6, which is provided to bring the support arms 4 from the open position O to the closed position S, or vice versa, can be implemented in any manner. In FIGS. 1-4, the adjusting device 6 has one spring element per support arm 4
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    AV-4017 AT
    5, here a leg spring, which holds the plurality of support arms 4 in the open position O in the relaxed state. Of course, several support arms 4 can also be held in the desired position (opening position O or closing position S) by means of a spring element. As an alternative to the leg spring, the spring element 5 could of course also be designed as a spiral spring (as a tension or compression spring, again depending on the desired tension in the opening position O or closing position S) or the like.
    In addition, a tensioning device 7 is shown in FIG. 4 which, when actuated, brings the spring element 5 into the tensioned state and thus brings the plurality of support arms 4 into the closed position S. In FIG. 4, the tensioning device 7 is designed as a rigid wire 7, on which a tension or pressure can be exerted from outside the exhaust pipe 11 in order to tension or relax the spring element 5. For this purpose, as is also shown in FIG. 4, the rigid wire 7 can be attached to the end of a support arm 4 remote from the axis 9, and thus a force can be applied to the support arms by means of tension or pressure on the wire 7 against the spring action of the spring element 5 4 in the open position O or in the closed position S. Corresponding holes 43 are provided in the support arms 4 for fastening the wire 7 to the support arms 4.
    If the spring force of the spring element 5 acts on the support arms 4 as shown in FIGS. 1-4 in such a way that they are brought into the opening position O, the sampling probe attachment 1 can be brought into the closed position, for example, by pulling or pushing the wire 7, the sampling probe attachment 1 are brought to the desired location inside the exhaust pipe 11 and then the train or the pressure on the wire 7 is reduced or stopped. The removal probe attachment 1 thus moves into the opening position O, which on the one hand brings it to the desired position of the cross section (e.g. in the center) of the exhaust pipe 11 and on the other hand it is also fixed against axial displacements. Thereupon, the exhaust gas removal process begins, after its completion the removal probe attachment 1 is again brought into the closed position against the spring force by pulling or pushing the wire 7 onto the spring element 7, whereupon the removal probe attachment 1 can be safely removed. Analogously, the spring force of the spring element 7 could also bring the support arms 4, or the removal probe attachment 1, into the closed position S, whereby the tension or pressure on the spring element 7 naturally brings the support arms into the open position O. This means that the tension or the pressure on the spring element 5 must be maintained during the exhaust gas extraction process, but not when the extraction probe attachment 1 is removed or inserted.
    Likewise, a fastening element 42 is present on each support arm 4 in FIGS. 1-4, via which one leg 51 of the respective leg spring is in engagement. The sampling probe attachment 1 is in engagement with the respective other legs 51 of the leg springs via further fastening elements 12. The fastening elements 42 and additional fastening elements AV-4017 AT are designed here as knobs, but can have any shape.
    In the embodiment shown, the sampling probe attachment 1 is designed as a separate head piece, which is connected to the axial end of the further sampling device 2, as disclosed, for example, in AT 514009 A2. 1-3, the sampling probe attachment 1 is shown as a separate head piece, which in this illustration is not connected to the further sampling device 2, in particular the tensioning device 7 and the measuring line 8. The support arms 4 are attached to the probe tip 1 as a head piece, the connection between the probe tip 1 as
    The head piece and the further sampling device 2 can be made detachable or non-detachable. This makes it possible to adapt the sampling probe attachment 1 and thus the support arms 4 with respective closing positions S or closing distances rS1, rS2 and opening positions O or opening distances rO1, rO2 to the respective requirements, e.g. the inner diameter d or cross section of a respective exhaust pipe 11 possible.
    Similar to the embodiment in FIG. 4, the sampling probe attachment 1 can be made in one piece with a measuring line 8.
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    权利要求:
    Claims (18)
    [1]
    claims
    1. Sampling device (2), with a sampling probe attachment (1), characterized in that a plurality of support arms (4) are arranged on the sampling probe attachment (1), each of which is at a distance (r1, r2) from the radial center of the sampling probe attachment (1 ) Radially farthest points (P1, P2) define that the plurality of support arms (4) in a first position define a closing position (S), in which the distances (r1, r2) closing distances (rS1, rS2) correspond to the A plurality of support arms (4) define an opening position (O) in a second position, in which the distances (r1, r2) correspond to opening distances (rO1, rO2), the sum of the closing distances (rS1, rS2) being smaller than the sum of the Opening distances (rO1, rO2) and that an adjustment device (6) is provided, which is designed to bring the plurality of support arms (4) from the open position (O) to the closed position (S), or vice versa.
    [2]
    2. Sampling device (2) according to claim 1, characterized in that the plurality of support arms (4) are each rotatably supported via an axis from the open position (O) to the closed position (S), or vice versa.
    [3]
    3. Sampling device (2) according to claim 2, characterized in that two support arms (4) are rotatably mounted on a common axis from the open position (O) to the closed position (S), or vice versa.
    [4]
    4. Sampling device (2) according to claim 2 or 3, characterized in that a stop element (41) is provided on the plurality of support arms (4), which preferably in the open position (O) and / or in the closed position (S) the sample probe attachment (1).
    [5]
    5. Sampling device (2) according to claim 1 or 2, characterized in that the plurality of support arms (4) are each radially laterally offset on the sampling probe attachment (1).
    [6]
    6. Sampling device (2) according to one of claims 1 to 5, characterized in that a straight plurality of support arms (4) are attached in pairs diametrically to the sampling probe attachment (1).
    [7]
    7. Sampling device (2) according to one of claims 1 to 6, characterized in that the adjusting device (6) has at least one spring element (5) which is designed in a relaxed state, the plurality of support arms (4) in the open position (O) or to keep in the closed position (S) and that the adjusting device (6) has a tensioning device (7) which, when actuated, the spring element (5) into a
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    AV-4017 AT clamped state, and thus the plurality of support arms (4) in the closed position (S) or
    Opening position (O) brings.
    [8]
    8. Sampling device (2) according to claim 7, characterized in that the number of spring elements (5) is designed as leg springs.
    [9]
    9. Sampling device (2) according to claim 7 or 8, characterized in that a spring element (5) is provided per support arm (4).
    [10]
    10. Sampling device (2) according to claim 8 or 9, characterized in that each support arm (4) via a fastening element (42) with a leg (51) of the respective leg spring in engagement and that the sampling probe attachment (1) via further fastening elements (12) with the respective other legs (51) of the leg springs in engagement.
    [11]
    11. Sampling device (2) according to one of claims 7 to 10, characterized in that the clamping device (7) is designed as a rigid wire.
    [12]
    12. Sampling device (2) according to one of claims 7 to 11, characterized in that at least part of the surface of the plurality of support arms (4), preferably at least the surface facing outwards, has a non-smooth surface structure.
    [13]
    13. A method for extracting exhaust gas from an exhaust pipe (11) of an internal combustion engine, characterized in that a plurality of support arms (4) of a sampling device (2), the most distant at a distance (r1, r2) from the center of a sampling probe attachment (1) Define points (P1, P2) into a closing position (S), in which the distances (r1, r2) correspond to closing distances (rS1, rS2), that the sampling device (2) is inserted into the exhaust pipe (11), that the plurality of support arms (4) are brought into an opening position (O) in which the distances (r1, r2) correspond to opening distances (rO1, rO2), the sum of the closing distances (rS1, rS2) being smaller than the sum of the opening distances ( rO1, rO2) is that an exhaust gas extraction process is started via the removal probe attachment (1), and after the removal process has ended, the plurality of support arms (4) are brought into a second closed position (Sj, in which the Distances (r1, r2) correspond to second closing distances (rST, rS2 '), the sum of which is smaller than the sum of the opening distances (rO1, rO2), and that the sampling device (2) is then removed from the exhaust pipe (11).
    [14]
    14. The method according to claim 13, characterized in that the closed position (S) corresponds to the second closed position (S j.
    -1314/18
    AVL List GmbH
    1.4

    [15]
    15/18
    AVL List GmbH
    2.4

    rS1 + rS2 <rO1 + rO2
    [16]
    16/18
    AVL List GmbH

    [17]
    17/18
    AVL List GmbH
    4.4

    [18]
    18/18
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    同族专利:
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    AT521370B1|2020-01-15|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US3190679A|1963-05-20|1965-06-22|Frank P Lester|Hose connector|
    DE19533183A1|1995-09-08|1997-03-13|Thomas Kaltwasser|Rapidly coupling pipe connector|
    EP2428790A1|2010-09-13|2012-03-14|MAHA Maschinenbau Haldenwang GmbH & Co. KG|Exhaust gas probe|
    DE102015108586A1|2014-06-20|2015-12-24|Avl List Gmbh|Sampling device|
    CN205670097U|2016-06-02|2016-11-02|江西华讯实业有限公司|A kind of engine analyzer sampling probe|DE102020109886A1|2020-04-08|2021-10-14|Testo SE & Co. KGaA|Exhaust gas sampling probe and method for exhaust gas measurement|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    ATA50530/2018A|AT521370B1|2018-06-27|2018-06-27|Sampling device|ATA50530/2018A| AT521370B1|2018-06-27|2018-06-27|Sampling device|
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