• 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 valve cap 1 and a valve at the end of an injection tube for introducing flowable injection material in ground. A simple device for defined and reliable introduction of the injection material is achieved in that the valve cap 1 a cylinder-like valve shell 2, which is formed of a rubber-like material, at its upper end a shell opening 4 for receiving the injection tube, at its lower end a closed tip 8 and in its interior has a cylinder-like cavity 9 with at least one depth stop element 6 to the depth stop 7 of the injection tube. In this case, the length of the valve jacket 2 in a lower region 5 from the valve tip 8 to the depth stop 7 corresponds at least to the diameter of the injection tube. The diameter of the cavity 9 is selected in the upper region so that the injection tube is inserted into the shell opening 4 at the upper end and the valve cap 1 due to an elongation of the rubber-like material after insertion of the injection tube is connected to the depth stop member 6 fixed to the injection tube and is detachable from the outer surface of the injection tube by means of an injection pressure due to the flowable injection material.
    公开号:CH710962A2
    申请号:CH00425/16
    申请日:2016-03-31
    公开日:2016-10-14
    发明作者:Jörger Karl-Heinz
    申请人:Jörger Karl-Heinz；
    IPC主号:
    专利说明:

    The invention relates to a valve cap and a valve for introducing flowable injection material in ground with an injection pipe or the like, which is connectable to a pressure source for the flowable injection material.
    For introducing an injection material in ground first holes are made in the ground. In each of these holes a self-curing support suspension is introduced, which usually consists of water, cement, clay and / or Betonit. This so-called jacket mixture forms a jacket body into which the injection tube is introduced with one or more injection valves. It is also possible to introduce a plurality of injection tubes each having a valve or branched injection tubes, at whose respective branch ends a valve is provided. Instead of an injection tube, an injection line or an injection tube or a similar device can also be used. The jacket body serves to stabilize the injection tube and prevents backflow of the injection material to the surface of the earth. So that the injection material can get into the ground, cracks must be generated in the shell body, through which the grout can flow into the ground.
    Such an injection tube with a valve is known from DE 10 2008 056 261 B4. At the lower end of the injection tube outlet openings are formed laterally. These are enclosed by an elastic cuff. The injection material should as far as possible emerge only in the immediate area of the injection valve and essentially in the horizontal direction, so that a possibly defined injection body is formed in the valve area. For this purpose, a centering body is arranged on the injection tube above the valve region, with which the valve is centered in the surrounding the injection tube jacket body. In addition, the centering on surfaces which form a separation surface in the sheath body, whereby injection body can be produced with a greater horizontal extent. In this device, the valve and the centering device must be secured by welding or screwing to the injection tube. In order to obtain an injection pressure at the lower end of the injection tube, which is large enough to produce cracks in the sheath body, a very high inlet pressure at the upper end of the injection tube is required. The quite complex centering device is required so that the jacket body can be torn open defined.
    From DE 4 106 839 a valve for re-injection of a grout anchor is known. The valve is formed in that in a region of the wall of the injection tube longitudinally spaced valve openings are provided, which are covered by an elastic sheath. The elastic sheath is configured to lift from the outer surface of the injection tube due to the pressure of the flowable injectable material being pumped into the injection tube. As a result, the injection material can flow between the injection tube and the elastic sheath and get into the ground. The valve is located in an area along the injection tube. It is attached to the tube by winding a self-sealing tape under tension. In this valve, a very large inlet pressure at the inlet of the injection tube is required to produce an injection pressure at the valve, which generates cracks in the casing body surrounding the injection tube, which are suitable for the defined introduction of the injection material. Therefore, this valve is used in particular for Nachinjektion, in which spaces in the ground, which were not filled with the main injection, can be refilled with the injection material. Also, a self-sealing tape is sluggish in its elastic properties, so that it does not return to its initial state after stretching and does not completely seal after injection.
    In view of this prior art, the present invention seeks to provide a valve for introducing flowable injection material, with which the introduction of the injection material can be defined with a simple device, without an excessive input pressure is required.
    This object is achieved by a valve cap having a cylinder-like valve shell, which is formed of a rubber-like material, at its upper end a shell opening for receiving the injection tube, at its lower end a closed tip and in its interior a cylindrical cavity with at least one depth stop element to the depth stop of the injection tube, wherein the length of the valve sheath in a lower region from the valve tip to the depth stop corresponds to at least the diameter of the injection tube, and wherein the diameter of the cavity in the upper region is selected so that the injection tube in the shell opening is insertable at the upper end and the valve cap is firmly connected to the injection tube due to an expansion of the rubber-like material after insertion of the injection tube up to the depth stop element and by means of an injection pressure due to the flowable inject Good is solvable from the outer surface of the injection tube.
    Furthermore, the object is achieved by a generic valve, to which at the lower end of the injection tube, such an inventive valve cap is applied. With the valve cap according to the invention, due to the properties of the rubber-like material and with the mold adapted to the injection tube, it is achieved that the valve cap can be easily and quickly applied to the injection tube for forming the valve according to the invention. A good and defined fit of the valve cap on the injection tube is also ensured by these inventive properties of the valve cap and due to the depth stop element. When inserting the injection tube into the valve cap or when placing the valve cap on the injection tube, the valve cap is slightly stretched and the injection tube is inserted so far until it rests on the depth stop elements. The valve can thus be manufactured or assembled in a simple manner without special aids directly on site.
    After the cap has been applied to the injection tube, the valve thus produced can be introduced into the bore. This ensures that the valve cap during insertion of the injection tube can not fall off, not even with touch, bumps and the like. If an inlet pressure is generated at the upper end of the injection pipe introduced into the soil, with which the flowable injection material is pumped to the valve, an injection pressure is created in the valve, namely first in its lower region. Due to the injection pressure, the valve cap expands in its lower region due to the forces occurring there and due to their shape radially or balloon-like. The radially outwardly acting forces cause a tearing of the jacket mixture, so that cracks occur in the shell body through which liquid can get into the ground. This is possible due to the inventive shape of the valve cap, in particular by the fact that at the lower end of the cylindrical cavity, a closed tip is formed.
    Since the dimensions of the valve cap and its material properties are chosen so that the valve sleeve dissolves by means of an injection pressure due to the flowable injection material from the outer surface of the injection tube causes further stretching of the valve cap due to the increasing pressure and due to the yielding of the jacket mixture, that the valve cap detaches from the injection tube in its upper region, so that the flowable injection material flows between the thus formed channel between the valve cap and the injection tube and reaches the jacket region, where the injection material causes further cracks in the jacket mixture and expansion of the jacket mixture , As a result, the grout gets into the ground or into the ground. Due to the balloon-like expansion of the valve cap, this process can be very targeted and defined. It is also only a small inlet pressure at the entrance of the injection tube required to produce a sufficiently large injection pressure and a sufficiently large explosive force in the surrounding the valve area jacket body, which allows a defined introduction of the injection material.
    The inner diameter of the valve cap is selected smaller than the outer diameter of the injection tube, so that an elongation is required to apply the valve cap to the injection tube. This is stretched so far that it sits firmly on the injection tube and can not fall off during use of this. The diameter of the Ausdehnbereichs the valve cap below the depth stop can be chosen larger, depending on which explosive force is to be generated in the jacket material. The larger the expansion area, the greater the explosive forces can be achieved.
    According to an advantageous embodiment of the invention, the rubber-like material and the diameter of the cavity in the upper region of the valve jacket are selected so that the valve jacket after completion of an injection, ie without injection pressure in the valve region, is firmly connected to the injection tube again. This ensures that the valve is closed again after an injection process and no further injection material can get into the soil undesirably. The valve is in its initial position and can be used again for a subsequent injection process in the same way as in the first injection process. The opening and closing of the valve can be controlled by means of the inlet pressure at the inlet of the injection tube via a pump and repeated as often as desired. The material for the valve cap is chosen so that it has such elastic properties and a suitable thickness, so that the cap for opening the valve is stretchable and closes again due to the restoring forces without injection pressure.
    Advantageously, the depth stop element is annular and formed with a smaller diameter than the diameter of the upper portion of the valve shell, wherein the diameter of the annular depth stop is selected so that the injection tube after its insertion on the depth stop ring and firmly seated. For this purpose, an annular element in the cylindrical cavity of the valve cap can be subsequently introduced and fixed or be made in one piece with the valve cap. The annular depth stop element may also be formed in that the valve jacket has a smaller diameter in its lower region than in its upper region, which is selected such that the injection tube rests annularly and firmly after its insertion on the depth stop. Depending on the application and the manufacturing conditions, the most favorable arrangement can be used. By means of the depth stop element according to the invention, a secure centering of the injection tube in the valve cap is ensured. This leads to a controlled and reliable opening and closing of the valve when building up and reducing the injection pressure and thereby inflating the lower part of the valve cap and releasing the upper part of the valve cap from the injection tube.
    According to another advantageous embodiment of the invention, at least two depth stop elements are formed as supernatant elements in the valve sleeve. These can be subsequently introduced into the valve cap, so that it can be produced with a constant inner diameter. The depth stop elements can be glued, welded or subsequently introduced in any other way. Also, they may be made in one piece with the creation of the cavity in the valve cap. It is favorable if the projection elements are formed axially symmetrical to the jacket axis of the valve jacket. Then the stability of the seating of the injection tube is reliably ensured even with a few depth stop elements.
    Essential for the depth stop elements is that their thickness and arrangement is chosen so that the injection tube is seated stable.
    It is also advantageous if the length of the valve casing in the lower region of the valve tip to the depth stop corresponds to at least the diameter of the injection tube. This ensures a particularly favorable distribution and symmetry of the forces caused by the injection pressure. Due to a longer length of the valve shroud in the lower region, with a lower inlet pressure at the upper end of the injection tube, a higher burst pressure can be created in the valve. The greater the length and the diameter of the valve jacket are selected in the lower region, the greater tearing and explosive forces can be achieved to blast the jacket mixture. To blast or introduce cracks in hard shell mixtures or in holes with large diameters each have a higher explosive force is required. According to the invention, the surface or the diameter and the length are selected in the lower region of the valve cap, as this is responsible for the pressurization. The lower area of the valve then acts like a pressure chamber or an explosive chamber. For this purpose, the valve can be selectively extended or its diameter can be increased. It is furthermore advantageous if the length of the valve jacket in the upper region from the depth stop to the jacket opening corresponds to at least approximately 1.2 times the diameter, preferably at least approximately 1.5 times the diameter of the injection tube. This ensures a reliable seat of the injection tube in the valve cap and a reliable opening and closing of the valve.
    A limitation of the valve length results from the fact that the injection liquid emerges at the upper end of the valve. The longer the lower area of the valve cap is selected, the more cracks can be generated over a greater depth range in the jacket mixture. However, these can no longer be filled with the injection liquid at too great a distance from the outlet opening of the valve for the injection liquid. The exact dimensions depend on the material of the jacket mixture, so that the exact dimensions of the valve cap can also be determined depending on the material of the jacket mixture, the diameter of the bore and other geographical parameters. The length of the valve mantle and the diameter of the valve mantle in the lower region are preferably chosen suitably for generating a predetermined blasting pressure, in particular as a function of material properties and thickness of a jacket mixture.
    Further details, features and advantages of the present invention will become apparent from the following description of preferred embodiments with reference to the drawings.
    [0018] FIG.<Tb> FIG. 1 <SEP> a schematic representation of a first embodiment of the inventive valve cap in cross section;<Tb> FIG. 2 is a schematic representation of a second embodiment of the inventive valve cap in cross section and<Tb> FIG. 3 <SEP> a schematic representation of a third embodiment of the valve cap according to the invention in cross section.
    In Fig. 1, a first embodiment of an inventive valve cap 1 is shown schematically in cross section. The valve cap 1 has a cylindrical valve shell 2, which is formed of a rubber-like material. In an upper region 3, the valve jacket 2 has an inner diameter which is suitable for receiving an injection tube 10 shown in FIG. 4. The inner diameter of the valve shell in the upper region is smaller than the outer diameter of the injection tube 10 and selected so that the valve cap 1 is firmly seated after being applied to the injection tube 10. This is achieved by stretching the rubber-like material of the valve cap 1. The valve cap 1 has a slightly tapered shell opening 4, which facilitates the reception of the injection tube 10. In a lower region 5, the valve jacket has a smaller inner diameter than in the upper region 3. This is chosen so that an annular depth stop element 6 is formed. This forms a depth stop 7 for the injection tube 10, which is inserted through the shell opening 4 in the upper region 3 of the valve shell. The injection tube 10, which is inserted to the depth stop 7, is firmly seated on the depth stop member 6 and is thereby held in a fixed, defined and centered position with respect to the valve cap 1 due to the forces of the stretched jacket material. At the lower end, the valve cap 1 has a closed tip 8.
    The material, in particular its elasticity, the thickness of the wall of the valve casing 2 and the shape of the valve cap 1, in particular the inner diameter in the upper and in the lower region, and the depth stop member, and the shape of the tip are chosen so that the cap can be fixedly mounted on the inserted injection tube, the injection tube is firmly seated on the depth stop 7 and the valve cap 1 of the injection tube 10 due to a predetermined injection pressure P of a flowable Injektionsguts of the outer surface of the injection tube 10 dissolves and falls below the injection pressure P again connects to the injection tube 10.
    2 shows a second embodiment of the inventive valve cap 1. In this embodiment, the inner diameter of the lower portion 5 of the valve shell 2 corresponds to the upper portion 3 of the valve shell 2. The depth stop member 6 is here by an annular projection in the cylindrical cavity. 9 the valve cap 1 is formed. As a result, slightly more injection material can be received in the lower region 5 than in the first exemplary embodiment of FIG. 1 and a somewhat larger injection pressure P at the same inlet pressure at the other end of the injection tube 10 are generated. Also, some material for the valve cap 1 can be saved.
    3, a further embodiment of the valve cap 1 is shown. Here, the inner diameter in the lower region 5 of the valve cap 1 corresponds to the inner diameter in the upper region 3 of the valve cap 1. There are three depth stop elements 6, 6, 6 are provided. These are designed as elongate projection elements and arranged in the axial direction along the inner surface of the cylindrical cavity in the valve casing 2. They are axially symmetrical to the central axis of the valve casing 2 and arranged and each have an equal angle to each other in the radial direction. By this arrangement, a stable depth stop 7 for an injection tube 10, which is inserted into the valve cap 1 is also formed.
    The illustrated embodiments are preferred embodiments of the invention and are not limiting for further embodiments of the inventive valve cap and the inventive valve. Thus, other arrangements and configurations of depth stop elements 6 can be used. The size of the inner diameter of the valve casing 2 is adjusted by the skilled person suitable for the particular injection tube 10 to be used. The expert can also choose as material with the appropriate elastic properties and thickness of the valve shell 2. For example, natural rubber is very suitable.
    In the following, the operation of the inventive valve will be explained with reference to the embodiment of Fig. 4.
    The valve cap 1 is applied to the lower end of an injection tube 10 under strain so that the injection tube 10 is seated on the depth stop 7 of the valve cap 1. The valve cap 1 is fixed and still stretchably connected to the injection tube 10 due to the elongation of the rubbery material. The injection tube 10 is placed in a designated, filled with a jacket mixture bore 11 in the ground. Alternatively, the jacket mixture can be introduced into the bore 11 via the valve and the injection tube. The injection line 10 and the valve are cleaned after the introduction of the jacket mixture, so that the injection tube 10 can be used with the valve formed by the valve cap 1 valve for the next injection. Alternatively, an additional injection line with valve can be used for introducing the jacket mixture.
    At the upper end of the injection tube 10, an inlet pressure is generated for example with a pump, by means of which flowable injection material to the lower end of the injection tube 10, where the valve is pumped. When the injection material enters the lower region 5 of the valve jacket, there is an overpressure, the injection pressure P. Through this, the valve cap 1 expands balloon-like in its lower region 5. The radially acting outward forces act as explosive forces K and cause a rupture of the existing in the bore 11 jacket mixture, so that cracks in the shell body 12 arise. By further stretching the valve cap 1 due to the increasing injection pressure P and due to the yielding of the jacket mixture, the valve cap 1 dissolves in its upper portion 3 of the injection tube 10, so that the flowable injection material along the thus formed channel 13 between the valve cap 1 and the injection tube 10 passes into the shell region and causes further cracks in the shell mixture and an expansion of the shell mixture. As a result, the grout gets into the ground. After completion of the injection process, the injection pressure P decreases and the material of the valve cap 1 contracts again due to its rubbery properties, so that the valve cap 1 returns to its initial state. It then lies firmly against the injection tube 10, so that no further injection material can flow into the ground. Also, no further explosive forces K act on the casing mixture, so that there are no further cracks. In a further injection, the process described above is repeated. It is thus created with the inventive valve cap 1 by applying to an injection tube 10, a valve which is suitable for a continuous opening and closing with respect to the injection material and with the various injection operations can be performed in succession.
    LIST OF REFERENCE NUMBERS
    [0027]<Tb> 1 <September> valve cap<Tb> 2 <September> valve shell<tb> 3 <SEP> Upper area of the valve jacket<Tb> 4 <September> jacket opening<tb> 5 <SEP> Lower area of the valve jacket<Tb> 6 <September> depth stop element<Tb> 7 <September> Depth stop<Tb> 8 <September> top<tb> 9 <SEP> Cylindrical cavity<Tb> 10 <September> Hole<Tb> 11 <September> covering body<Tb> 12 <September> Channel<Tb> P <September> injection pressure<Tb> K <September> explosive power
    权利要求:
    Claims (9)
    [1]
    1. Valve cap for producing a valve at the end of an injection tube for introducing flowable injection material in ground, characterized by a cylinder-like valve shell (2), theIs formed from a rubbery material,- At its upper end a jacket opening (4) for receiving the injection tube (10),- At its lower end a closed top (8) and- Has in its interior a cylinder-like cavity (9) with at least one depth stop element (6, 6, 6) to the depth stop (7) of the injection tube (10),wherein the length of the valve casing (2) in a lower region (5) from the valve tip (8) to the depth stop (7) is at least equal to the diameter of the injection tube (10), and wherein the diameter of the cavity (9) is upper Region (3) is selected so that the injection tube (10) in the shell opening (4) at the upper end is inserted and the valve cap (1) due to an expansion of the rubber-like material after insertion of the injection tube to the depth stop element (6, 6 6 ^^) is firmly connected to the injection tube and by means of an injection pressure (P) due to the flowable Injektionsguts of the outer surface of the injection tube (10) is releasable.
    [2]
    2. Valve cap according to claim 1, characterized in that the rubber-like material and the diameter of the cavity (9) in the upper region (3) of the valve sheath (2) are selected so that the valve sheath (2) after completion of an injection, ie without Injection pressure, again firmly connected to the injection tube (10).
    [3]
    3. Valve cap according to claim 1 or 2, characterized in that the depth stop element (6, 6, 6) is annular and formed with a smaller diameter than the diameter of the upper portion (3) of the valve casing (2), wherein the Diameter of the annular depth stop (6, 6, 6) is selected so that the injection tube (10) after its insertion on the depth stop (7) annularly and firmly seated.
    [4]
    4. Valve cap according to claim 3, characterized in that the depth stop element (6, 6, 6) is formed in that the valve casing (2) in its lower region (5) has a smaller diameter than in its upper region ( 3), which is selected so that the injection tube (10) after its insertion on the depth stop (7) annularly and firmly seated.
    [5]
    5. Valve cap according to claim 1 or 2, characterized in that at least two depth stop elements (6, 6, 6) are formed as supernatant elements in the valve casing (2).
    [6]
    6. valve cap claim 5, characterized in that the projection elements are formed axially symmetrical to the jacket axis of the valve jacket (2).
    [7]
    7. Valve cap according to one of the preceding claims, characterized in that the length of the valve casing (2) in the upper region (3) of the depth stop (7) to the shell opening (4) at least 1.2 times the diameter, preferably at least 1.5 times the diameter of the injection tube (10).
    [8]
    8. Valve cap according to one of the preceding claims, characterized in that the length of the valve sheath (2) and the diameter of the valve sheath (2) in the lower region (5) suitable for generating a predetermined explosive pressure, in particular depending on material properties and thickness of a Sheath mixture can be selected.
    [9]
    9. Valve for introducing injection material into ground, with an injection tube (10) which is connectable to a pressure source for a flowable medium, characterized in that at the lower end of an injection tube (10) has a valve cap (1) with the features of a of the preceding claims is applied.
    类似技术:
    公开号 | 公开日 | 专利标题
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    DE2218944A1|1973-10-31|INNER PLUG CONNECTION FOR DRILL PIPES
    DE2259648C3|1977-11-24|Device for producing the grout of a tension or compression pile
    DE202015105194U1|2015-12-02|in anchor
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    同族专利:
    公开号 | 公开日
    DE102015105083A1|2016-10-06|
    AT517041A2|2016-10-15|
    CH710962B1|2020-07-31|
    AT517041A3|2019-05-15|
    AT517041B1|2020-07-15|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    DE1073969B|1960-01-21|Deutsche Bundesbahn vertreten durch das Bundesbahn Zentralamt Minden Minden |Injection lance for pressing flowable agents into the ground in loose gravel or the like consisting of an injection pipe and a tip piece|
    DE2922940A1|1978-06-02|1979-12-13|Imed Corp|LOW PRESSURE ONE-WAY VALVE|
    US4607663A|1985-07-12|1986-08-26|Red Valve Co., Inc.|Inversion-resistant, readily-openable tide gate valve|
    SE466066B|1990-04-25|1991-12-09|Knut Nordvall Betongtaetning A|An injection|
    DE4106839C2|1991-03-04|1994-06-30|Suspa Spannbeton Gmbh|Valve, especially for re-injecting a grout in the ground|
    US6585005B1|1999-08-18|2003-07-01|Red Valve Co., Inc.|Reinforced tide gate valve|
    ITVI20010240A1|2001-11-14|2003-05-14|Franco Stocchiero|SEALING VALVE AND BREATHER VALVE FOR ELECTRIC ACCUMULATORS|
    DE102008056261B4|2008-11-06|2011-06-16|Bauer Spezialtiefbau Gmbh|Ventilzentrierung|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    DE102015105083.8A|DE102015105083A1|2015-04-01|2015-04-01|Valve cap and valve for injecting grout into ground|
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