Sealing clamp for pressure bursting test of pipe

Abstract

The utility model relates to the field of pipe tests, and discloses a sealing clamp for a pipe pressure-resistant bursting test, which comprises a protective pipe, sealing structures are arranged on the upper portion and the lower portion of the protective pipe, each sealing structure comprises two connecting pieces, and the two connecting pieces are fixedly connected with the upper portion and the lower portion of the protective pipe respectively. Fastening covers are arranged on the sides, away from each other, of the two connecting pieces, the sealing structure further comprises two sealing assemblies, a connector is installed in the middle of the top face of the sealing assembly located on the upper portion, and a pressure release valve is installed in the middle of the bottom of the sealing assembly located on the lower portion; the ends, close to the sealing assembly, of the connector and the pressure release valve are each provided with a connecting pipe. According to the utility model, the sealing element is matched with the protective pipe, the gland is matched with the sealing gasket, and the limiting gasket is matched with the fixing cap, so that pipes with different sizes can be better limited and sealed by the device, and the practicability of the device is effectively improved.

Description

Technical Field

[0001] The utility model relates to the field of pipe tests, in particular to a sealing fixture for pipe pressure resistance and burst tests. Background Art

[0002] The pipe pressure resistance and burst test is a test method for testing the pressure resistance performance of pipes. In this test, the pipe is pressurized to a certain pressure level, and then the pressure is continuously applied until the pipe ruptures or bursts. This test can evaluate the pressure resistance performance and burst strength of the pipe when it bears internal pressure.

[0003] After retrieval, Chinese Patent Publication No.: CN217384980U discloses a sealing fixture for pipe pressure resistance and burst tests, belonging to the technical field of pipe sealing fixtures. The fixture includes a pressure resistance test tooling, and the pressure resistance test tooling includes a pressure resistance test fixture assembly and a protection device. When in use, first remove the threaded rod from the inside of the internal thread sleeve, insert the pipe to be detected outside the wall of the internal thread sleeve, and the lower end is stuck on the outer wall of the boss. Thread-connect the protection device with the internal thread through the external thread, then thread-connect the threaded rod with the internal thread sleeve, and then loosen the bottom sealing bolt to discharge air and reduce the resistance of the sealing downward pressure. At this time, use a wrench or power tool to clamp the outer wall of the hexagon head and rotate. During the process of rotating and moving down, the rubber sealing pad seals and presses tightly against the upper end surfaces of the pipe and the stainless steel glass tube. After pressing tightly, tighten the sealing bolt to fix the internal air, and then connect an air pump through the pressure inlet and pressurize from the pressure outlet to complete the experiment.

[0004] Although the above device can insert the pipe outside the wall of the internal thread sleeve and the lower end is stuck on the outer wall of the boss, and then tighten the screw rod with the internal thread sleeve to press down the pressure plate to fix the pipe, due to the relatively fixed structure of the boss, when the size of the pipe changes, it is very difficult to engage with the boss. During the process of the pressure plate moving down, the pipe will shake due to external forces and other reasons, resulting in the pipe tilting, thus affecting the sealing performance of the upper and lower ends of the pipe and having an impact on the test values. Therefore, a sealing fixture for pipe pressure resistance and burst tests is proposed to solve the above problems. Summary of the Utility Model

[0005] In order to make up for the above deficiencies, the utility model provides a sealing fixture for pipe pressure resistance and burst tests, aiming to improve the problem in the prior art that due to the relatively fixed structure of the boss, when the size of the pipe changes, it cannot be well connected to the boss for limiting, and when the pressure plate presses for sealing, the pipe is prone to shake and shift due to external force, affecting the sealing performance during the pipe detection, thus having an impact on the detection results.

[0006] To achieve the above object, the utility model adopts the following technical solutions: A sealing fixture for the pressure-resistant bursting test of pipes, including a protective pipe, and sealing structures are arranged at both the upper and lower parts of the protective pipe. The sealing structures include two connecting pieces, and the two connecting pieces are respectively fixedly connected to the upper and lower parts of the protective pipe. Fastening covers are arranged on the sides of the two connecting pieces away from each other.

[0007] As a further description of the above technical solution:

[0008] The sealing structure further includes two sealing assemblies. A connecting head is installed in the middle of the top surface of the upper sealing assembly, and a pressure relief valve is installed in the middle of the bottom of the lower sealing assembly. Connecting pipes are installed at one ends of the connecting head and the pressure relief valve close to the sealing assemblies.

[0009] As a further description of the above technical solution:

[0010] A pipe body is jointly arranged between the two sealing assemblies.

[0011] As a further description of the above technical solution:

[0012] The sealing assembly includes a gland, the gland is threadedly connected to the inner wall of the protective pipe, the connecting pipe passes through the gland and is fixedly connected to it, a sealing gasket is movably connected to the inner wall of the gland, and the sealing gasket is movably connected to the connecting pipe.

[0013] As a further description of the above technical solution:

[0014] The sealing assembly further includes a connecting ring, and a sealing ring is fixedly connected to one side of the connecting ring close to the connecting piece.

[0015] As a further description of the above technical solution:

[0016] A limiting pad is arranged on one side of the sealing gasket close to the pipe body, the limiting pad is movably connected to the connecting pipe, a fixing cap is arranged on the side of the limiting pad away from the sealing gasket, and the fixing cap is threadedly connected to the connecting pipe.

[0017] As a further description of the above technical solution:

[0018] A connection port adapted to the gland is opened at the top of the fastening cover, and the gland is movably connected to the fastening cover.

[0019] As a further description of the above technical solution:

[0020] A fastening groove is opened at the top of the connecting piece, the fastening cover is threadedly connected to it, a sealing groove is opened in the middle of the top surface of the connecting piece, and the sealing ring is movably connected to it.

[0021] The utility model has the following beneficial effects:

[0022] 1. In the utility model, through the mutual cooperation between the sealing member and the protective pipe, and through the mutual cooperation between the gland, the sealing gasket, the limiting gasket and the fixing cap, the device can better limit and seal pipes of different sizes, effectively improving its practicability.

[0023] 2. In the utility model, through the mutual cooperation between the protective pipe, the connecting member and the sealing assembly, through the mutual cooperation between the connecting ring, the sealing ring and the sealing groove, and through the mutual cooperation between the connecting member, the sealing assembly and the fastening cover, the sealing performance and stability of the device are effectively improved. Description of the Drawings

[0024] Figure 1 It is an overall three-dimensional structural schematic diagram of a sealing fixture for a pipe pressure resistance and burst test proposed by the utility model;

[0025] Figure 2 It is a disassembled three-dimensional structural schematic diagram of a sealing fixture for a pipe pressure resistance and burst test proposed by the utility model;

[0026] Figure 3 It is an enlarged three-dimensional structural schematic diagram of part A of a sealing fixture for a pipe pressure resistance and burst test proposed by the utility model;

[0027] Figure 4 It is a disassembled three-dimensional structural schematic diagram of the sealing assembly of a sealing fixture for a pipe pressure resistance and burst test proposed by the utility model.

[0028] Legend Explanation:

[0029] 1. Protective pipe; 2. Connecting member; 3. Sealing assembly; 4. Fastening cover; 5. Connector; 6. Pressure relief valve; 7. Connecting pipe; 8. Pipe body; 31. Gland; 32. Connecting ring; 33. Sealing ring; 34. Sealing gasket; 35. Limiting gasket; 36. Fixing cap; 41. Connection port; 21. Fastening groove; 22. Sealing groove. Detailed Implementation Modes

[0030] Next, the technical solutions in the embodiments of the utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only a part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the utility model.

[0031] Refer to Figure 1 - Figure 2, an embodiment provided by the present utility model: a sealing fixture for pipe pressure resistance and burst test, including a protective pipe 1 for protection. Sealing structures are provided at both the upper and lower parts of the protective pipe 1 for sealing. The sealing structure includes two connecting pieces 2 for connecting the sealing component 3 and the fastening cover 4. The two connecting pieces 2 are respectively fixedly connected to the upper and lower parts of the protective pipe 1. On one side of the two connecting pieces 2 away from each other, there is a fastening cover 4 for strengthening the connection between the sealing component 3, the connecting piece 2, and the protective pipe 1. The sealing structure further includes two sealing components 3 for sealing the pipe. In the middle of the top surface of the upper sealing component 3, a connecting head 5 is installed for connecting with a pressurizing device. In the middle of the bottom of the lower sealing component 3, a pressure relief valve 6 is installed for decompression after the test. At one end of the connecting head 5 and the pressure relief valve 6 close to the sealing component 3, a connecting pipe 7 is installed for communicating with the inside of the protective pipe 1. A pipe body 8 is jointly arranged between the two sealing components 3.

[0032] Please refer to Figure 3 - Figure 4 , the sealing component 3 includes a gland 31 for clamping the pipe body 8. The gland 31 is threadedly connected to the inner wall of the protective pipe 1. The connecting pipe 7 penetrates through the gland 31 and is fixedly connected thereto. The connecting pipe 7 can be inserted into the inside of the pipe body 8. A sealing gasket 34 is movably connected to the inner wall of the gland 31 for sealing. It is made of rubber material. The sealing gasket 34 is movably connected to the connecting pipe 7. The sealing component 3 further includes a connecting ring 32 for connecting the sealing ring 33. On one side of the connecting ring 32 close to the connecting piece 2, a sealing ring 33 is fixedly connected for connecting with the connecting piece 2. It is made of rubber material for enhancing the sealing performance. On one side of the sealing gasket 34 close to the pipe body 8, a limiting gasket 35 is provided for limiting the pipe body 8 and strengthening the sealing between the pipe body 8 and the device. It can be replaced according to the size of the pipe body 8. The limiting gasket 35 is movably connected to the connecting pipe 7. On one side of the limiting gasket 35 away from the sealing gasket 34, a fixing cap 36 is provided for fixing the limiting gasket 35. The fixing cap 36 is threadedly connected to the connecting pipe 7. On the top of the fastening cover 4, a connection port 41 adapted to the gland 31 is provided for facilitating the installation of the fastening cover 4. The gland 31 is movably connected to the fastening cover 4. On the top of the connecting piece 2, a fastening groove 21 is provided for connecting the fastening cover 4. The fastening cover 4 is threadedly connected thereto. In the middle of the top surface of the connecting piece 2, a sealing groove 22 is provided for cooperating with the use of the sealing ring 33. The sealing ring 33 is movably connected thereto.

[0033] Working principle: When in use, first, according to the size of the pipe, put a suitable limit pad 35 on the outside of the connecting pipe 7, and then tighten the fixing cap 36 with the connecting pipe 7 so that the fixing cap 36 presses the limit pad 35 against the sealing pad 34 to fix the limit pad 35. Then connect the sealing component 3 equipped with the pressure relief valve 6 to the connecting piece 2, and connect the gland 31 to the protective pipe 1, so that the sealing ring 33 on one side of the connecting ring 32 on the gland 31 is stuck in the sealing groove 22. After the sealing component 3 is fixed to the protective pipe 1 and the connecting piece 2, put the fastening cover 4 on the outside of the sealing component 3, so that the gland 31 passes through the connecting port 41, and tighten the fastening cover 4 with the fastening groove 21 to fix the fastening cover 4 to the connecting piece 2. Then put one end of the pipe body 8 to be tested on the outside of the limit pad 35 of the sealing component 3, so that one end thereof is close to the sealing pad 34. Then fix another sealing component 3 equipped with the connector 5 to the other end of the protective pipe 1 and another connecting piece 2, so that the gland 31 on this side drives the sealing pad 34 on this side to press the other end of the pipe, and the limit pad 35 on this side is inserted into the other end of the pipe to seal the pipe by the device. Then install another fastening cover 4 to the connecting piece 2 on this side. During the detection, the pressurizing equipment inflates the pipe through the connector 5 to conduct a pressure-resistant burst test on the pipe. After the detection is completed, the pressure relief valve 6 is used to decompress the inside of the device.

[0034] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A sealing fixture for a pipe pressure burst test, comprising a protective tube (1), characterized in that: The upper and lower parts of the protection tube (1) are both provided with sealing structures, the sealing structures comprising two connecting pieces (2), the two connecting pieces (2) being fixedly connected to the upper and lower parts of the protection tube (1) respectively, and the two connecting pieces (2) being provided with fastening covers (4) on the sides away from each other.

2. The sealing fixture for pipe pressure burst test according to claim 1, characterized in that: The sealing structure further comprises two sealing assemblies (3), a connector (5) being installed in the middle of the top surface of the upper sealing assembly (3), a pressure relief valve (6) being installed in the middle of the bottom of the lower sealing assembly (3), and a connecting pipe (7) being installed at one end of the connector (5) and the pressure relief valve (6) close to the sealing assembly (3).

3. The sealing fixture for pipe pressure burst test according to claim 2, characterized in that: A pipe body (8) is commonly arranged between the two sealing components (3).

4. The sealing fixture for pipe pressure burst test according to claim 2, characterized in that: The sealing assembly (3) comprises a gland (31), the gland (31) being threadedly connected to the inner wall of the protection tube (1), the connecting tube (7) passing through the gland (31) and being fixedly connected thereto, a sealing gasket (34) being movably connected to the inner wall of the gland (31), and the sealing gasket (34) being movably connected to the connecting tube (7).

5. The sealing fixture for pipe pressure burst test according to claim 4, characterized in that: The sealing assembly (3) further comprises a connecting ring (32), and a sealing ring (33) is fixedly connected to a side of the connecting ring (32) close to the connecting piece (2).

6. The sealing fixture for pipe pressure burst test according to claim 4, characterized in that: A limiting pad (35) is provided on a side of the sealing pad (34) close to the pipe body (8), the limiting pad (35) being movably connected to the connecting pipe (7), and a fixing cap (36) is provided on a side of the limiting pad (35) away from the sealing pad (34), the fixing cap (36) being threadedly connected to the connecting pipe (7).

7. The sealing fixture for pipe pressure burst test according to claim 5, characterized in that: The top of the fastening cover (4) is provided with a connection opening (41) adapted to the pressing cover (31), and the pressing cover (31) is movably connected to the fastening cover (4).

8. The sealing fixture for pipe pressure burst test according to claim 7, characterized in that: The top of the connecting piece (2) is provided with a fastening groove (21), to which the fastening cover (4) is threadedly connected; the middle of the top surface of the connecting piece (2) is provided with a sealing groove (22), to which the sealing ring (33) is movably connected.

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