• 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:
    Clamping jaw (1) for holding parts (2) comprising at least one thin tubular mouth, the jaw being configured to hold the mouth of the part (2) clamped between a first clamping piece (4) and a second clamping piece (2). mooring (5), which also comprises a seal (8) for sealing the mouth, the seal (8) being housed in a housing disposed in one of said mooring pieces (4, 5), said joint being movable of sealing (8) inside the housing in the axial direction of the jaw (1) between a first position and a second position, the first position being anterior to the second position in the direction of insertion (B) of the mouth in the mooring pieces (4, 5). The seal (8) is compressed when it moves to the first position and remains uncompressed when it moves to the second position. (Machine-translation by Google Translate, not legally binding)
    公开号:ES2698372A1
    申请号:ES201731006
    申请日:2017-08-02
    公开日:2019-02-04
    发明作者:Garmendia Ibai Ulacia；Amilibia Jon Larranaga；Abasolo Jokin Lozares；Palomino David Santamaria；Manzano Julen Maskariano
    申请人:Mondragon Goi Eskola Politeknikoa Jose Maria Arizmendiarrieta Scoop；
    IPC主号:
    专利说明:

    [0001]
    [0002] Clamping jaw
    [0003]
    [0004] SECTOR OF THE TECHNIQUE
    [0005]
    [0006] The present invention relates to clamping jaws of parts that ensure tightness between the clamp and the part that is clamped.
    [0007]
    [0008] PRIOR STATE OF THE TECHNIQUE
    [0009]
    [0010] Apparatus for subjecting tubular parts to leak tightness tests are known. Said pieces are usually tied at the ends with a jaw and a fluid is circulated inside the piece to check the tightness.
    [0011]
    [0012] In this regard CN205940946 U discloses a clamping jaw that holds one end of a piece comprising a thin tubular mouth. Said jaw comprises a first piece that is inserted inside the mouth and a second piece comprising three arcs disposed at approximately 120 °. Each arch is movable to approach or move away from the mouth driven by a screw. When approaching the arcs towards the center of the piece, the tubular mouth is imprisoned between the first piece and the three arcs.
    [0013]
    [0014] EXHIBITION OF THE INVENTION
    [0015]
    [0016] The object of the invention is to provide a clamping jaw for clamping pieces comprising at least one thin tubular mouth, as defined in the claims.
    [0017]
    [0018] The clamping jaw of the invention is configured to hold the thin tubular mouth in one piece, locking said mouth between a first clamping part and a second clamping part. mooring piece.
    [0019]
    [0020] The jaw also comprises a seal for sealing the mouth of the piece to be tested. Said gasket is housed in a housing disposed in one of said clamping parts, said gasket being movable inside the housing in the axial direction of the clamp between a first position and a second position, the first position being before the second position in the sense of insertion of the mouth in the mooring pieces. The seal is compressed when it is moved to the first position and uncompressed when it is moved to the second position, such that said seal is moved to the second position during insertion of the mouth into the lashing pieces to allow said insertion, and the seal is moved to the first position and compressed when a fluid is introduced into the interior of the piece, ensuring a tight seal between the mouth of the piece and the jaw.
    [0021]
    [0022] With the jaw of the invention it is avoided that during insertion of the mouth of the parts to be tested said insert is hindered by the seal. The mouth of the piece when it is inserted between the two mooring pieces is in the way with a portion of the sealing gasket projecting from the housing. The mouth of the piece, being a thin tubular zone, is not robust enough to compress and deform the seal in a direction perpendicular to the axial direction, but to displace it axially without being deformed. Therefore, the axial displacement of the joint in the housing prevents the mouth of the piece from being deformed by the joint itself when it is in the way with the portion of the joint protruding from the housing. In this way, the correct positioning of the parts in the clamp is guaranteed, ensuring a correct seal between the mouth and the clamp, and without risk of deforming the parts.
    [0023]
    [0024] The jaw of the invention can be used to subject the parts that are subjected to sealing tests. If, once the part is clamped with the clamp, a fluid is introduced inside said part, the tightness between the clamp and the part will be guaranteed and it will be possible to detect if the part has any leakage.
    [0025]
    [0026] These and other advantages and features of the invention will become apparent in view of the figures and the detailed description of the invention.
    [0027] DESCRIPTION OF THE DRAWINGS
    [0028]
    [0029] Figure 1 shows a first sectional view of an embodiment of the clamping jaw according to the invention where the mouth of the piece to be tested is inserted in said clamp.
    [0030]
    [0031] Figure 2 shows the detail C of the clamping jaw of Figure 1 with the seal in the second position.
    [0032]
    [0033] Figure 3A shows a second detail of the clamping jaw of Figure 1 with the seal in the second position.
    [0034]
    [0035] Figure 3B shows a third detail of the clamping jaw of Figure 1 with the seal in the second position.
    [0036]
    [0037] Figure 3C shows a fourth detail of the clamping jaw of Figure 1 with the seal in the first position and compressed.
    [0038]
    [0039] Figure 3D shows a detail of the housing of the seal of the jaw of Figure 1.
    [0040]
    [0041] DETAILED EXHIBITION OF THE INVENTION
    [0042]
    [0043] Figure 1 shows a sectioned view of the clamping jaw 1 according to an embodiment of the invention wherein the mouth 2.1 of a part 2 is inserted in said clamp 1 to be clamped so as to guarantee the tightness between the clamp 1 and the clamp 1. piece 2
    [0044]
    [0045] The clamping jaw 1 of the invention can be the jaw of an apparatus for submitting parts to sealing tests, the solution of the invention also being valid for any application in which it is necessary to seal a part with a clamp.
    [0046]
    [0047] The clamping jaw 1 of the invention is configured to grip the mouth 2.1 of the piece 2 to be tested. Said piece 2, according to a non-limiting example, is a tubular piece that It comprises a central area in the form of a bellows and a 2.1 tube mouth at each end. The piece 2, or at least the mouths 2.1 where the piece 2 will be fastened, is a thin tubular piece, that is to say, a piece whose thickness is so thin that it can be easily deformed.
    [0048]
    [0049] The clamp 1 of the invention can be used, for example, to subject pieces 2 to watertightness tests. For this purpose, once part 2 is clamped with the clamp 1, a fluid is introduced into part 2 of the clamp to detect leaks in the workpiece. the piece2.
    [0050]
    [0051] As shown in Figure 1, the mouth 2.1 of the part 2 is clamped between a first clamping part 4 and a second clamping part 5 during the introduction of a fluid inside the part 2 to check the tightness of said piece 2, as will be detailed later.
    [0052]
    [0053] To check the tightness of the piece 2, it is first necessary to ensure the tightness between the clamp 1 and the piece 2 to be tested so as not to distort the results of the test carried out.
    [0054]
    [0055] For this, the clamp 1 comprises a seal 8, for example an O-ring, to seal the mouth 2.1 where the piece 2 to be tested is fastened. Said gasket 8 is housed in a housing 7 arranged, in the embodiment shown in the figures, in the first clamping piece 4. The gasket 8 is movable inside the housing 7 in the axial direction of the clamp between a first position and a second position, the first position being anterior to the second position in the insertion direction B of the mouth 2.1 in the tie pieces 4 and 5. The seal 8 is compressed when it moves to the first position and uncompressed when it moves to the second position, in such a way that said seal 8 is displaced to the second position during the insertion of the mouth 2.1 into the fastening pieces 4 and 5 to allow said insertion, and the seal 8 is moved to the first position and compressed during the introduction of the fluid, ensuring a tight seal between the mouth 2.1 of the piece 2 to be tested and the clamp 1.
    [0056]
    [0057] The housing 7, according to the embodiment of the invention shown in the figures, is delimited axially between a first wall 7.1 and a second wall 7.2, said first wall 7.1 being disposed in an anterior axial position as the second wall 7.2 in the insertion direction of the mouth 2.1 in the mooring pieces 4 and 5, so that the height of the housing 7 is increasing from the first wall 7.1 to the second wall 7.2.
    [0058]
    [0059] The housing 7, according to the embodiment of the invention shown in the figures, also comprises an upper wall 7.3 disposed between the first wall 7.1 and the second wall 7.2, the sealing gasket 8 being compressed against a section of said wall 7.3 when the gasket 8 it is moved to the first position, as will be described later.
    [0060]
    [0061] The second position of the housing 7 is located near the second wall 7.2 and the first position near the first wall 7.1, so that when the joint 8 is moved to the second position pushed by the mouth 2.1 of the piece to be tested during the insertion thereof, the gasket 8 is not compressed because in the radial direction the housing 7 has enough clearance to accommodate the gasket 8 inside it without it being compressed.
    [0062]
    [0063] As known to the person skilled in the art, the sealing gaskets comprise a portion projecting from the joint housing. The housing is usually located in one of the two components where you want to ensure a tight seal. The second component of the sealed connection, the mouth 2.1 of the piece 2 to be tested in the example of the invention, exerts a pressure against said projecting portion, compressing and deforming the joint, to ensure the seal.
    [0064]
    [0065] However, in the jaw 1 of the invention, the seal 8 is not compressed between the upper wall 7.3 of the housing 7 and the piece 2 to be tested when the mouth 2.1 of said piece 2 is inserted but at a later stage, such and as will be detailed below.
    [0066]
    [0067] When the mouth 2.1 of the part 2 is inserted between the two clamping parts 4 and 5, this can cause the seal 8 to move inside the housing 7 in the direction of insertion B of the mouth 2.1 in the workpieces. Mooring 4 and 5, ie towards the second wall 7.2 of the housing 7, as shown in Figure 3B, allowing the correct insertion of the mouth 2.1 into the clamp 1, as will be explained later.
    [0068]
    [0069] Subsequently, the sealing gasket 8 of the invention is displaced towards the first wall 7.1 pressed by the fluid that is introduced into the part 2, said gasket being compressed and deformed against the mouth 2.1 of the part 2 and a portion of the upper stop 7.3 of the housing 7, as shown in FIG. 3C, thus sealing the mouth 2.1 of the piece 2 just before starting the test.
    [0070] Therefore, with the jaw 1 of the invention it is prevented that the insertion of the mouth 2.1 of the parts 2 is hindered by the seal 8.
    [0071]
    [0072] The mouth 2.1 of the part 2 according to the embodiment of the invention shown in the figures is in the way with the portion of the seal 8 projecting from the housing 7 when it is inserted between both tie pieces 4 and 5. The mouth 2.1 of the piece 2, being a thin tubular zone, is not robust enough to deform the seal 8 but to displace it axially without the joint 8 being deformed. Therefore, the axial displacement of the gasket 8 in the housing 7 prevents the mouth 2.1 from being deformed by the gasket 8 itself when it is in the way with the lip of the gasket 8 protruding from the housing 7. In this way , the correct positioning of the parts 2 in the clamp 1 is guaranteed, ensuring a correct sealing between the mouth 2.1 and the clamp 1, and without risk of deforming the parts 2 to be tested that would make the correct sealing test impossible.
    [0073]
    [0074] As already mentioned, the housing 7 of the seal 8 of the embodiment of the invention shown in the figures is delimited by the first wall 7.1, comprising a first height h, the second wall 7.2 comprising a second height H different from the first height h, preferably being the second height H greater than the first height h, and the upper wall 7.3 joining both walls 7.1 and 7.2, as can be seen in the detail of figure 3D. As can be seen in said figure, the upper wall 7.3 is a wall inclined so that the height of the housing 7 increases from the first wall 7.1 towards the second wall 7.2, which allows the board 8 to be housed without compressing it in the wall. housing 7 in the second position even though the second component, i.e., the mouth 2.1 of the piece 2 to be tested has been introduced, the sealing being carried out between the clamp 1 and the piece 2 to be tested in a later stage and not during the insertion from the mouth 2.1 in the mooring pieces 4 and 5.
    [0075]
    [0076] The width d of the housing 7 will be the minimum possible to allow the seal 8 to be housed without compressing it during the insertion of the mouth 2.1 of the piece 2 to be tested, to ensure the correct insertion of said mouth 2.1.
    [0077]
    [0078] In the preferred embodiment of the invention, the housing 7 is disposed on the first tie piece 4, as shown in the drawings, therefore, the seal 8 cooperates with the outer surface of the mouth 2.1 to make the tight seal of piece 2.
    [0079]
    [0080] In the preferred embodiment of the invention, the second clamping piece 5 is movable, so that when the mouth 2.1 is inserted in the clamp 1, that is to say, in the gap 6 between both clamping parts 4 and 5, such and as shown for example in Figures 3A or 3B, the second tie piece 5 is approximated towards the first tie piece 4, said mouth 2.1 being trapped between the first tie piece 4 and the second tie piece 5, such and as shown in Figure 3C.
    [0081]
    [0082] In order not to increase the clamping time of the apparatus of the invention in excess, it is not advisable that the gap 6 between both clamping parts 4 and 5 be raised, therefore said recess 6 will be sufficient to allow the insertion of the mouth 2.1 of piece 2 to be tested with a small clearance.
    [0083]
    [0084] The first tie piece 4 according to the embodiment of the invention comprises a recess 4.3, shown for example in figures 2, 3B or 3C, which houses the second tie piece 5. Said recess 4.3 comprises a tie-down surface 4.1, shown for example in Figure 3A, configured to abut against the outer surface of the mouth 2.1 and a conical abutment surface 4.2, shown for example in Figure 2, which faces the clamping surface 4.1 and which supports the second part 5 so that it can move on the inclined surface of the conical support surface 4.2, as seen in detail C of Figure 2.
    [0085]
    [0086] In a preferred embodiment, the second tie piece 5 is a ring, preferably split, wherein the inner surface 5.2 of said ring corresponds to the geometry of the bearing surface 4.2 of the first tie piece 4, so that the surface 5.2 can move relative to the bearing surface 4.2 of the first tie piece 4.
    [0087]
    [0088] The second clamping piece 5 is displaceable on said bearing surface 4.2 so that when the second clamping piece 5 is displaced in the insertion direction B of the mouth 2.1, the second clamping piece 5 approaches radially towards the surface of the clamping member 5. tie 4.1 of the first piece of tie 4, and vice-versa, catching the mouth 2.1 of piece 2 to be tested between both tie pieces 4 and 5.
    [0089]
    [0090] The fact that the mooring piece 5 is a split ring favors that this can be expanded as the second tie piece 5 ascends the surface 4.2 of the first tie piece 4 to allow the inside diameter of the second tie piece 5 to increase if necessary, or which can be retracted to decrease the inner diameter of the second tie piece 5 so that it can be adjusted back to the surface 4.2 when the second tie piece 5 descends said surface 4.2.
    [0091]
    [0092] The second clamping piece 5 comprises a clamping surface 5.1 configured to abut against the inner surface of the mouth 2.1, so that the mouth 2.1 is bound by the clamping surface 4.1 of the first clamping part 4 and the clamping surface clamping 5.1 of the second clamping piece 5 when the second clamping piece 5 is displaced towards the clamping surface 4.1 of the first clamping part 4, as detailed below.
    [0093]
    [0094] In a preferred embodiment of the invention, the housing 7 is arranged on the clamping surface 4.1 of the first clamping piece 4, as shown in the figures.
    [0095]
    [0096] The clamp 1 comprises, in a preferred embodiment, a thrust piece 9 which, when operated in one direction, preferably according to the insertion direction B of the mouth 2.1 of the workpiece 2 to be tested, presses the second clamping piece 5 so that it approaches, radially, the tie-down surface 4.1 of the first tie piece 4, trapping the mouth 2.1 between the first tie piece 4 and the second tie piece 5, as shown in Figure 3C. When the pushing piece 9 is driven in the opposite direction, the second clamping piece 5 is free to retract and therefore the mouth 2.1 is released from the clamp 1.
    [0097]
    [0098] As shown in Figure 1, the thrust piece 9 comprises a circular main body 9.1 which is disposed concentrically in the interior of the first clamping part 4. At least a portion of the outer surface of said main body 9.1 comprises a thread cooperating with a thread disposed on the inner surface of the first tie piece 4, cooperating with the push piece 9 according to a male-female connection. In this way, when rotating the pushing piece 9 it is displaced axially with respect to the first clamping piece 4. As shown in figure 1, to facilitate the rotation of the pushing piece 9 the clamp 1 comprises a handle 10 joined integrally to the body 9.1 of the pushing piece 9.
    [0099] The thrust piece 9 also comprises a head 9.2 at one end projecting diametrically from the main body 9.1 and cooperating with the second clamping piece 5 to push it if necessary, making it possible to bring said second clamping piece 5 closer to the clamping surface 4.1 of the first tie piece 4, as described below.
    [0100]
    [0101] In a non-limiting example, when rotating the pushing piece 9 for example in the counterclockwise direction, it is displaced axially according to the insertion direction B of the mouth 2.1, and therefore the head 9.2 pushes the second tie piece 5, causing the second tie piece 5 to climb up the ramp of the conical support surface 4.2 of the first tie piece 4.
    [0102]
    [0103] The thrust piece 9 according to the preferred embodiment of the invention is hollow, the inside of said thrust piece 9 being in communication with the inside of the piece 2 to be tested.
    [0104]
    [0105] The fluid used to carry out the leak test runs through the interior of the thrust piece 9. In the case of the apparatus of the invention, one of the jaws 1 will drive the circulation of the fluid necessary to perform the leak test through the corresponding push piece 9, while the push piece 9 of the other jaw 1 will collect said fluid and will lead it, for example, to a storage tank (not shown in the drawings).
    [0106]
    [0107] In order that the fluid used to carry out the leakage test does not leak between the pusher piece 9 and the first tie piece 4, another seal 12 is disposed between the two pieces. Said seal 12 is housed in another housing 11, shown in FIG. Figure 1, preferably arranged in the pushing piece 9.
    [0108]
    [0109] However, said housing 11 is a conventional housing, that is to say, a housing whose dimensions conform to the standard dimensions for a certain seal, since in this case there is no problem detected with the seal 8 that collaborates with the mouth 2.1 of piece 2 to be tested to ensure the seal of said mouth 2.1.
    [0110]
    [0111] When the leak test begins, the fluid used to perform the leak test axially pushes the seal 8 towards the first wall 7.1 of the seal. housing 7, as shown in Figure 3C, said gasket 8 being stuck in the first position so that it is compressed against a portion of the upper wall 7.3 of the housing that pushes the gasket against the outer surface of the mouth 2.1 of the piece 2. Consequently, the joint 8 is deformed radially, that is to say in the direction perpendicular to the axial direction of the clamp 1, hermetically sealing the piece 2.
    [0112]
    [0113] The invention also relates to an apparatus for carrying out sealing tests comprising at least one clamp 1 according to the invention. The most common will be that part 2 has two nozzles 2.1 and therefore the apparatus of the invention also has two jaws 1, each jaw 1 holding one of the mouths 2.1. In a preferred embodiment, one of the jaws 1 may be integral with a moving carriage (not shown in the figures) movable at least axially, so that the apparatus may also allow dynamic tests on the parts 2 apart from the leak tests , such as a tensile / compression fatigue test. Said carriage could also be configured to exert a rotational movement that would facilitate, for example, a torsion test.
    权利要求:
    Claims (12)
    [1]
    Clamping jaw for clamping pieces (2) comprising at least one thin tubular mouth (2.1), the clamp being configured to grip the mouth (2.1) of the part (2) clamped between a first clamping piece (4) and a second tie piece (5), characterized in that it comprises a seal (8) for sealing the mouth (2.1), the seal (8) being housed in a housing (7) disposed in one of said pieces of mooring (4, 5), said seal being displaceable (8) inside the housing (7) in the axial direction of the jaw (1) between a first position and a second position, the first position being before the second position in the direction of insertion (B) of the mouth (2.1) in the mooring pieces (4, 5), leaving the sealing gasket (8) compressed when it is moved to the first position and the seal is left ( 8) without compressing when moving to the second position, such that said seal (8) it is moved to the second position during the insertion of the mouth (2.1) into the mooring pieces (4, 5) to allow said insertion, and the seal (8) is moved to the first position and compressed when a seal is inserted. fluid inside the piece (2).
    [2]
    The clamp according to claim 1, wherein the housing (7) is axially delimited between a first wall (7.1) and a second wall (7.2), said first wall (7.1) being arranged in an anterior axial position as the second wall (7.1). (7.2) in the direction of insertion of the mouth (2.1) in the mooring pieces (4, 5), so that the height of the housing (7) is increasing from the first wall (7.1) to the second wall ( 7.2).
    [3]
    The clamp according to claim 2, wherein the housing (7) also comprises an upper wall (7.3), disposed between the first wall (7.1) and the second wall (7.2), the sealing gasket (8) being compressed against a section of said wall (7.3) when the joint (8) is moved to the first position.
    [4]
    Jaw according to claim 3, wherein the first wall (7.1) comprises a first height (h) and the second wall (7.2) comprises a second height (H) greater than the first height (h), the upper wall being (7.3) an inclined wall that joins both walls (7.1, 7.2).
    [5]
    5. Jaw according to any of the preceding claims, wherein the housing (7) is arranged in the first clamping piece (4) and the second clamping piece (5) is movable, so that when the mouth (2.1) is inserted in the clamp (1) the second clamping piece (5) ) is approximated towards the first mooring part (4), said mouth (2.1) being trapped between the first mooring part (4) and the second mooring part (5).
    [6]
    The clamp according to claim 5, wherein the first clamping piece (4) comprises a recess (4.3) that houses the second clamping piece (5), said recess (4.3) comprising a clamping surface (4.1) configured for stop against the outer surface of the mouth (2.1), and the second clamping piece (5) also comprising a clamping surface (5.1) configured to abut against the inner surface of the mouth (2.1), said mouth being ( 2.1) moored by the mooring surface (4.1) of the first mooring part (4) and the mooring surface (5.1) of the second mooring part (5).
    [7]
    The clamp according to claim 6, wherein the recess (4.3) also comprises a conical bearing surface (4.2) facing the clamping surface (4.1), the second clamping part (5) being supported on said surface of support (4.2) of the first mooring part (4), the second mooring part (5) being movable on said support surface (4.2) so that when the mooring part (5) is displaced in the direction of insertion of the mouth (2.1), the mooring piece (5) is approximated radially towards the first mooring piece (4) and vice-versa.
    [8]
    The clamp according to claim 6 or 7, wherein the housing (7) is arranged on the clamping surface (4.1) of the first clamping part (4).
    [9]
    The clamp according to any of claims 5 to 8, wherein the clamp (1) comprises a thrust piece (9) which when pushed in one direction pushes the second clamping piece (5) so that it approaches the first mooring piece (4) for trapping the mouth (2.1) of the piece (2) between the first mooring piece (4) and the second mooring piece (5), and that when it is driven in the opposite direction it releases the mouth (2.1) of the clamp (1).
    [10]
    Apparatus for subjecting to watertightness tests pieces comprising at least one thin tubular mouth (2.1), characterized in that it comprises at least one clamp (1) according to any of the preceding claims.
    [11]
    11. Apparatus according to claim 10, comprising two jaws (1), preferably both jaws (1) facing each other.
    [12]
    12. Apparatus according to claim 11, wherein one of the jaws (1) is arranged on a movable carriage axially displaceable, so that said apparatus also allows dynamic tests.
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    同族专利:
    公开号 | 公开日
    ES2698372B2|2019-07-08|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US2179200A|1938-07-06|1939-11-07|Albert J Scholtes|Hose coupling|
    US3222091A|1962-08-30|1965-12-07|Dixon Valve & Coupling Co|Pressure responsive fluid tight hose coupling|
    SU832382A1|1979-07-16|1981-05-23|Предприятие П/Я Г-4913|Device for fluid-tightness testing of rubber corrugated tubes|
    法律状态:
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