A hydrostatic pressure resistance testing device

Abstract

This utility model relates to the technical field of pipe testing devices, specifically to a hydrostatic pressure resistance testing device for sealing the openings at both ends of a pipe under test to form a sealed pressure-bearing chamber inside. It includes two valve bodies, each valve body having a stepped hole axially formed at one end. The stepped hole is composed of multiple coaxial positioning holes with progressively decreasing diameters. Each positioning hole is used to position the end of a pipe under test with at least one outer diameter. This utility model features stepped positioning holes in the valve body, which can cover pipes of various diameters under test. It eliminates the need to replace the valve body; simply insert the pipe under test into the matching positioning hole. This achieves "multi-purpose use from one end," saving replacement time. Furthermore, it employs end-face sealing and axial compression. The compression component, in conjunction with the fastening assembly, applies a uniform axial force to the sealing component, causing deformation of the sealing component to seal the gap between the pipe under test and the positioning hole, significantly improving sealing reliability under high pressure.

Description

Technical Field

[0001] This utility model relates to the technical field of pipe testing devices, and in particular to a hydrostatic resistance testing device. Background Technology

[0002] The hydrostatic test, also known as the water pressure test or hydraulic strength test, is a critical safety test conducted on pressure vessels, piping systems, boilers, or other pressure-bearing equipment after manufacturing or during periodic inspections. Its purpose is to confirm that the equipment will not undergo plastic deformation or rupture under pressures far exceeding normal operating conditions, ensuring sufficient safety margins before or during use. The test principle and procedures are as follows:

[0003] 1. Water injection and air release: Cut a certain length of the test tube from the pipe fitting as a sample, use the end cap to seal the openings at both ends of the test tube, fill the test tube completely with water through the water hole of the end cap, and remove as much air as possible;

[0004] 2. Pressurization: Use a high-pressure water pump to slowly and steadily increase the system pressure to the specified test pressure;

[0005] 3. Pressure holding: Maintaining pressure for a specified time under test pressure;

[0006] 4. Inspection: During the pressure holding and depressurization process, carefully inspect all parts of the equipment for leaks, water seepage, abnormal deformation, cracks, or abnormal pressure drops;

[0007] 5. Depressurization and drainage: After confirming that there are no problems, slowly depressurize to zero and drain the water out of the equipment and dry it.

[0008] Current technical problems: At present, the end caps used for water pressure testing on the market adopt the "one pipe, one end cap" method, that is, an end cap that is individually customized to match each type of pipe to be tested. When testing different pipe diameters, the end caps need to be changed frequently, which is time-consuming and labor-intensive, and the efficiency is extremely low, especially in the scenario of testing small batches and multiple specifications of pipes. Utility Model Content

[0009] In view of this, the purpose of this utility model is to propose a hydrostatic resistance testing device to solve the technical problem that the existing hydrostatic testing heads cannot adapt to various pipes with different outer diameters.

[0010] To achieve the above objectives, this utility model provides a hydrostatic resistance testing device for sealing the openings at both ends of the tube under test to form a sealed pressure-bearing chamber inside, comprising:

[0011] Two valve bodies, each valve body having a stepped hole axially formed at one end, the stepped hole being composed of multiple positioning holes with progressively decreasing diameters and coaxial, each positioning hole being used to position the end of a test tube with at least one outer diameter, and at least one of the two valve bodies having a water hole and an air hole connected to a pressure chamber at the end opposite to the positioning hole.

[0012] Fastening assembly for fixing the end of the tube to be tested to the end face of the corresponding positioning hole;

[0013] Seals;

[0014] A clamping element is used to apply axial clamping force to the sealing element by engaging the end face of the positioning hole, thereby deforming the sealing element and sealing the connection between the tube to be tested and the positioning hole.

[0015] As a preferred embodiment of this invention, the sealing element is a sealing ring.

[0016] As a preferred embodiment of this utility model, the clamping element includes:

[0017] The first positioning plate has a through hole in the middle for the tube to be tested to pass through.

[0018] A pressure sleeve is provided at one end of the first positioning plate and extends in a direction perpendicular to the first positioning plate, and a pressure surface for contacting the seal is formed at the end of the pressure sleeve.

[0019] As a preferred embodiment of this invention, the fastening assembly includes:

[0020] Two outer clamps that cooperate with each other, the inner side of the outer clamps forms an arc-shaped positioning surface that matches the cross-sectional profile of the tube to be tested, the valve body forms a second positioning plate radially outward at its end near the positioning hole, and the outer clamps form a positioning groove on the inner side for placing the first positioning plate and the second positioning plate.

[0021] A fixing block with a first threaded hole is symmetrically arranged at both ends of the outer hoop.

[0022] The first bolt is used to engage with the first threaded hole to apply a force to the two outer clamps in opposite directions, thereby locking the two outer clamps together.

[0023] As a preferred technical solution of this utility model, the clamping member further includes a second bolt, and the outer hoop has a second threaded hole with a through positioning groove on its surface. The second bolt is adapted to the second threaded hole, and by rotating the second bolt, it can be made to move axially to apply axial force to the first positioning plate.

[0024] As a preferred embodiment of this utility model, the outer hoop has a plurality of first protruding teeth formed on its arc-shaped positioning surface.

[0025] As a preferred technical solution of this utility model, the fastening assembly further includes an inner hoop, the inner hoop having a second convex tooth on its outer side that engages with the first convex tooth, and a third convex tooth on its inner side for fitting the outer surface of the tube to be tested. By replacing the inner hoop with the third convex tooth having a different inner diameter, the tube to be tested with a different outer diameter can be clamped.

[0026] As a preferred embodiment of this utility model, the inner hoop is composed of two halves of the inner hoop.

[0027] As a preferred technical solution of this utility model, the valve body is provided with a number of lifting lugs at one end away from the positioning hole, and the surface of the lifting lugs is provided with lifting holes, which can be used with ropes to suspend the device in a constant temperature medium water tank.

[0028] As a preferred embodiment of this utility model, the water hole and air hole are located at one end of one of the valve bodies opposite to the positioning hole.

[0029] The beneficial effects of this utility model are as follows: This utility model has stepped positioning holes in the valve body, which can cover tubes of various diameters to be tested. There is no need to replace the valve body. Just insert the tube to be tested into the positioning hole with the matching diameter. It can achieve "one end for multiple uses" and save replacement time. At the same time, it adopts end face sealing + axial compression. Each positioning hole can be embedded with a customized seal. The compression component can work with the fastening component to apply a uniform axial force to the seal. After the seal deforms, it seals the gap at the connection between the tube to be tested and the positioning hole, which significantly improves the sealing reliability under high pressure and reduces the dependence on the perfect flatness of the end of the tube to be tested. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only for this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 This is a three-dimensional structural diagram of the valve body and the tube to be tested according to this utility model;

[0032] Figure 2 This is a three-dimensional structural diagram of the valve body, outer hoop, and inner hoop of this utility model;

[0033] Figure 3 This is a top view of the valve body, outer hoop, and inner hoop of this utility model.

[0034] Figure 4 This is a schematic diagram of the main cross-sectional structure of the valve body, outer hoop, inner hoop, pressure sleeve, and the tube to be tested of this utility model;

[0035] Figure 5 This is a schematic diagram of the three-dimensional structure of the valve body, outer hoop, inner hoop, pressure sleeve, and tube to be tested of this utility model.

[0036] Figure 6 For the present utility model Figure 5 Enlarged structural diagram at point A in the middle;

[0037] Figure 7 This is a three-dimensional structural diagram of the valve body, outer hoop, inner hoop, and pressure sleeve of this utility model in disassembled state.

[0038] The markings in the diagram are as follows: 1. Valve body; 2. Water hole; 3. Air hole; 4. Positioning hole; 5. Seal; 6. Test tube; 7. Outer hoop; 8. Positioning groove; 9. Second positioning plate; 10. First positioning plate; 11. Pressure sleeve; 12. Second bolt; 13. Second threaded hole; 14. First bolt; 15. First threaded hole; 16. First tooth; 17. Inner hoop; 18. Second tooth; 19. Third tooth; 20. Lifting lug; 21. Lifting hole. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments.

[0040] It should be noted that, unless otherwise defined, the technical or scientific terms used in this utility model should have the ordinary meaning understood by one of ordinary skill in the art to which this utility model pertains. The terms "first," "second," and similar terms used in this utility model do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0041] like Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, a hydrostatic pressure resistance testing device is used to seal the openings at both ends of a test tube 6 to form a sealed pressure-bearing chamber inside. The device includes: two valve bodies 1, each valve body 1 having a stepped hole axially formed at one end. The stepped hole is composed of multiple coaxial positioning holes 4 with progressively decreasing diameters. Each positioning hole 4 is used to position the end of the test tube 6 with at least one outer diameter. At least one of the two valve bodies 1 has a water hole 2 and an air hole 3 at the end opposite to the positioning hole 4, communicating with the pressure-bearing chamber; a fastening assembly for fixing the end of the test tube 6 to the end face of the corresponding positioning hole 4; a sealing element 5; and a clamping element for applying axial clamping force to the sealing element 5 with the end face of the positioning hole 4, causing the sealing element 5 to deform and seal the connection between the test tube 6 and the positioning hole 4.

[0042] In use, determine the appropriate positioning hole 4 according to the outer diameter of the tube 6 to be tested. Fit the sealing element 5 onto the end of the tube 6 to be tested, and insert the end of the tube 6 into the corresponding positioning hole 4. Install the clamping element and fastening assembly into the valve body 1 as required, so that the fastening assembly stably fixes the tube 6 to be tested, ensuring that the tube 6 to be tested will not move relative to the valve body 1. Simultaneously, use the clamping element to generate axial pressure on the sealing element 5. The sealing element 5 is clamped between the positioning hole 4 and the clamping element and deforms, thereby sealing the positioning hole 4 and the tube 6 to be tested. Following the above operation, another... A valve body 1 is also installed at the other end of the tube to be tested 6, thereby sealing the openings at both ends of the tube to be tested 6 to form a sealed pressure chamber. The water hole 2 is connected to the water pump's water injection pipe through a conventional connector, and water is injected into the pressure chamber through the water hole 2. During the injection process, the air originally located in the pressure chamber will be discharged through the air hole 3. Then, the air hole 3 is blocked with a sealing component. The entire device is placed in a constant temperature medium water tank, and the pressure chamber is continuously injected with the pressure specified for the test to carry out the test. This part is existing technology and will not be described in detail here.

[0043] The above technical solution can improve experimental efficiency, with the following specific advantages:

[0044] First, because the stepped positioning hole 4 can cover the test tube 6 of various diameters, there is no need to replace the end cap body, i.e. the valve body 1. You only need to insert the test tube 6 into the positioning hole 4 with the matching diameter, which realizes "one end for multiple uses" and saves replacement time. It is especially suitable for multi-specification, high-frequency testing scenarios such as laboratories and quality inspection centers.

[0045] Secondly, it enhances sealing reliability and compatibility by adopting end face sealing + axial compression. Each positioning hole 4 provides a dedicated end face, into which a custom seal 5 can be embedded, ensuring that the end of the tube under test 6 is fully fitted with the end face of the positioning hole 4. The compression component can work with the fastening assembly to apply a uniform axial force to the seal 5, so that the seal 5 deforms and seals the gap at the connection between the tube under test 6 and the positioning hole 4, significantly improving sealing reliability under high pressure and reducing the dependence on the perfect flatness of the end of the tube under test 6.

[0046] In addition, since a single valve body can replace a multi-specification end cap inventory, spare parts and inventory costs can be significantly reduced, the types of purchases can be reduced, storage space can be saved, management costs can be reduced, and testing delays caused by lack of specifications can be avoided.

[0047] Finally, the valve body directly integrates water hole 2 and air hole 3, supporting: liquid injection at one end and air venting at the other end with dual valve body coordination, or single valve body 1 with dual-channel liquid injection / air venting integrated into one, integrating the liquid injection / air venting channels, simplifying the system.

[0048] like Figure 4 and Figure 5 As shown, in this embodiment, the sealing element 5 is a sealing ring;

[0049] The above technical solution can be used to seal the gap at the connection between the tube to be tested 6 and the positioning hole 4 using a sealing ring. An O-ring can be selected as the sealing ring.

[0050] like Figure 4 , Figure 5 and Figure 6 As shown, in this embodiment, the clamping component includes: a first positioning plate 10, the first positioning plate 10 having a through hole in the middle for the tube 6 to be tested to pass through; and a pressure sleeve 11, which is located at one end of the first positioning plate 10 and extends in a direction perpendicular to the first positioning plate 10, and a pressure surface for contacting the sealing component 5 is formed at the end of the pressure sleeve 11.

[0051] The above technical solution can apply axial pressure to the seal 5, so as to force the seal 5 to deform and thus seal the connection between the tube to be tested 6 and the positioning hole 4.

[0052] like Figure 4 , Figure 5 and Figure 7As shown, in this embodiment, the fastening assembly includes: two outer clamping bodies 7 that cooperate with each other, the inner side of the outer clamping body 7 forming an arc-shaped positioning surface adapted to the cross-sectional profile of the tube to be tested 6, the valve body 1 forming a second positioning plate 9 radially outward at its end near the positioning hole 4, and the outer clamping body 7 forming a positioning groove 8 on its inner side for placing the first positioning plate 10 and the second positioning plate 9; a fixing block with a first threaded hole 15, the fixing blocks being symmetrically arranged at both ends of the outer clamping body 7; and a first bolt 14, which is used to apply a force to the two outer clamping bodies 7 in opposite directions by cooperating with the first threaded hole 15, so as to lock the two outer clamping bodies 7 in opposite directions.

[0053] The above technical solution can fix the tube to be tested 6 in the positioning hole 4 in the valve body 1. In use, the pressure sleeve 11 is first inserted into the positioning hole 4 and made to abut against the sealing element 5. At this time, due to the abutment of the sealing element 5 against the first positioning plate 10, there is a certain gap between the first positioning plate 10 and the second positioning plate 9. The positioning groove 8 on the inner side of the outer hoop 7 is inserted to wrap the first positioning plate 10 and the second positioning plate 9. Then, the first bolt 14 is passed through the first threaded hole 15. By tightening the first bolt 14, the two outer hoop 7 move towards each other, thereby clamping the tube to be tested 6 and preventing the tube to be tested 6 from moving relative to the valve body 1.

[0054] like Figure 5 and Figure 7 As shown, in this embodiment, the clamping component also includes a second bolt 12, and the outer hoop 7 has a second threaded hole 13 with a through positioning groove 8 on its surface. The second bolt 12 is adapted to the second threaded hole 13.

[0055] The above technical solution can further improve the pressing effect on the seal 5. By inserting the second bolt 12 into the second threaded hole 13, the second bolt 12 can be rotated to make it move axially to apply axial force to the first positioning plate 10. Then, the first positioning plate 10 drives the pressure sleeve 11 connected to it to move synchronously, and the pressure sleeve 11 is used to deform the seal 5.

[0056] like Figure 7 As shown, in this embodiment, the outer hoop 7 has a plurality of first protruding teeth 16 formed on its arc-shaped positioning surface;

[0057] The above technical solution can help improve the friction coefficient between the outer hoop 7 and the tube 6 to be tested. When the two outer hoop 7 are locked, the first protruding tooth 16 will be driven to fit against the outer circumferential surface of the tube 6 to be tested, causing slight deformation of the outside of the tube 6 to be tested, thereby improving the fixing effect of the tube 6 to be tested and preventing the tube 6 to be tested from loosening.

[0058] like Figure 4 and Figure 5As shown, in this embodiment, the fastening assembly also includes an inner hoop 17, on the outer side of which a second protruding tooth 18 is formed to engage with the first protruding tooth 16, and on the inner side of which a third protruding tooth 19 is formed for fitting the outer surface of the tube 6 to be tested.

[0059] By adopting the above technical solution, the inner hoop 17 with different inner diameter third convex teeth 19 can clamp tubes 6 with different outer diameters. At the same time, multiple clamping parts are also configured. The first positioning plates 10 of these clamping parts are the same in specifications, the difference is that the height of the pressure sleeve 11 is different, thus corresponding to positioning holes 4 of different depths. Therefore, only the sealing part 5, the inner hoop 17 and the clamping parts need to be replaced to adapt to various tubes 6 with different outer diameters. The valve body 1 and the outer hoop 7 are universal.

[0060] like Figure 7 As shown, in this embodiment, the inner hoop 17 is composed of two halves of the inner hoop.

[0061] The above technical solution allows the inner hoop 17 to be easily fixed to the outer circumference of the tube 6 from the side, making the installation method more flexible.

[0062] like Figure 1 and Figure 2 As shown, in this embodiment, the valve body 1 is provided with a plurality of lifting lugs 20 at one end away from the positioning hole 4, and the surface of the lifting lugs 20 is provided with lifting holes 21.

[0063] The above technical solution allows the device to be suspended in the constant temperature medium water tank via the lifting hole 21 and ropes, preventing the device from sinking to the bottom of the constant temperature medium water tank, making it difficult to remove, or from coming into contact with other parts of the constant temperature medium water tank and affecting the accuracy of the test.

[0064] like Figure 1 , Figure 3 and Figure 5 As shown, in this embodiment, the water hole 2 and the air hole 3 are opened at one end of one of the valve bodies 1 away from the positioning hole 4;

[0065] The above technical solution allows for easy integration of liquid injection / venting into a single valve body 1.

[0066] Working principle: When in use, first, determine the appropriate positioning hole 4 according to the outer diameter of the tube 6 to be tested, put the sealing element 5 on the end of the tube 6 to be tested, and insert the end of the tube 6 to be tested into the corresponding positioning hole 4.

[0067] Then, the pressure sleeve 11 is inserted into the positioning hole 4 and made to abut against the seal 5. According to the outer diameter of the tube to be tested 6, an inner hoop 17 with a suitable inner diameter third protrusion 19 is selected. The second protrusion 18 of the inner hoop 17 is coupled with the first protrusion 16 of the outer hoop 7. The positioning groove 8 on the inner side of the outer hoop 7 is inserted to wrap the first positioning plate 10 and the second positioning plate 9. Then, the first bolt 14 is passed through the first threaded hole 15. By tightening the first bolt 14, the two outer hoops 7 move towards each other, thereby driving the inner hoop 17 to move synchronously, thereby clamping the tube to be tested 6 and preventing the tube to be tested 6 from moving relative to the valve body 1.

[0068] Insert the second bolt 12 into the second threaded hole 13. By rotating the second bolt 12, it can be made to move axially to apply axial force to the first positioning plate 10. Then, the first positioning plate 10 drives the pressure sleeve 11 connected to it to move synchronously. The pressure sleeve 11 deforms the sealing element 5, thereby sealing the positioning hole 4 and the tube to be tested 6. According to the above operation, another valve body 1 is also installed at the other end of the tube to be tested 6, so that the openings at both ends of the tube to be tested 6 are closed to form a sealed pressure chamber.

[0069] Connect water hole 2 to the water pump's injection pipe using a conventional connector. Inject water into the pressure chamber through water hole 2. During the injection process, the air originally located in the pressure chamber will be discharged through air hole 3. Then, use a sealing device to block air hole 3. Use a rope to suspend the device in a constant temperature medium water tank through lifting hole 21 and continuously inject the pressure specified for the test into the pressure chamber to conduct the test.

[0070] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples; within the framework of the present invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in the details for the sake of brevity.

[0071] This utility model is intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A hydrostatic pressure resistance testing device for closing the open ends of a pipe (6) to be tested to form a sealed pressure chamber inside it, characterized in that, include: Two valve bodies (1) are provided with a stepped hole at one end along the axial direction. The stepped hole is composed of a plurality of positioning holes (4) with gradually decreasing diameters and coaxial. Each positioning hole (4) is used to position the end of a tube (6) of at least one outer diameter. At least one of the two valve bodies (1) is provided with a water hole (2) and an air hole (3) at the end opposite to the positioning hole (4) to communicate with the pressure chamber. Fastening assembly, which is used to fix the end of the tube to be tested (6) to the end face of the corresponding positioning hole (4); Seal (5); A clamping element is used to apply axial clamping force to the sealing element (5) by the end face of the positioning hole (4), so that the sealing element (5) is deformed and the connection between the tube to be tested (6) and the positioning hole (4) is sealed.

2. The hydrostatic pressure test device of claim 1, wherein, The sealing element (5) is a sealing ring.

3. The hydrostatic pressure test device of claim 1, wherein, The clamping element includes: The first positioning plate (10) has a through hole in the middle for the tube to be tested (6) to pass through; A pressure sleeve (11) is provided at one end of the first positioning plate (10) and extends in a direction perpendicular to the first positioning plate (10), and a pressure surface for contacting the seal (5) is formed at the end of the pressure sleeve (11).

4. The hydrostatic pressure test device of claim 3, wherein, The fastening assembly includes: Two outer clamps (7) that are in relative cooperation, the inner side of the outer clamps (7) forms an arc-shaped positioning surface that matches the cross-sectional profile of the tube to be tested (6), the valve body (1) forms a second positioning plate (9) in the radial direction at its end near the positioning hole (4), and the outer clamps (7) form a positioning groove (8) on the inner side for placing the first positioning plate (10) and the second positioning plate (9). A fixing block with a first threaded hole (15) is provided, and the fixing blocks are symmetrically arranged at both ends of the outer hoop (7); The first bolt (14) is used to engage with the first threaded hole (15) to apply a force to the two outer hoops (7) to move in opposite directions, so as to lock the two outer hoops (7) in opposite directions.

5. The hydrostatic pressure test device of claim 4, wherein, The clamping component also includes a second bolt (12). The outer hoop (7) has a second threaded hole (13) with a through positioning groove (8) on its surface. The second bolt (12) is adapted to the second threaded hole (13). By rotating the second bolt (12), it can be made to move axially to apply axial force to the first positioning plate (10).

6. The hydrostatic pressure test device of claim 4, wherein, The outer hoop (7) has several first protruding teeth (16) formed on its arc-shaped positioning surface.

7. The hydrostatic pressure test device of claim 6, wherein, The fastening assembly also includes an inner hoop (17), which has a second protrusion (18) on its outer side that engages with the first protrusion (16), and a third protrusion (19) on its inner side for fitting the outer surface of the tube to be tested (6). By replacing the inner hoop (17) with the third protrusion (19) of different inner diameters, the tube to be tested (6) of different outer diameters can be clamped.

8. The hydrostatic pressure test device of claim 7, wherein, The inner hoop (17) consists of two half-inner hoops.

9. The hydrostatic pressure test device of claim 1, wherein, The valve body (1) has several lifting lugs (20) at one end away from the positioning hole (4). The surface of the lifting lugs (20) is provided with lifting holes (21). The lifting holes (21) can be used with ropes to suspend the device in the constant temperature medium water tank.

10. The hydrostatic pressure test device of claim 1, wherein, The water hole (2) and air hole (3) are located at one end of one of the valve bodies (1) away from the positioning hole (4).

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