Pipe test clamp device

Abstract

The utility model relates to the technical field of pipe detection, in particular to a pipe test fixture device. The device comprises an outer fixing piece, a fixing cap and a pipe clamping assembly, a middle through hole with a taper slope is formed in the fixing cap, a through hole for liquid circulation is formed in the center of the outer fixing piece, one end of a pipe is provided with a beveled edge expanding outwards, the other end of the pipe penetrates through the middle through hole, and the beveled edge at one end of the pipe is clamped at the taper slope of the middle through hole. One end of the outer fixing piece is connected into the fixing cap and is in butt joint with the inverted edge of the pipe, the through hole is communicated with the interior of the pipe, the pipe clamping assembly is connected with the fixing cap, and the pipe clamping assembly is arranged on the outer wall of the pipe in a sleeving mode and presses the pipe. The universal joint is high in universality, the test requirements of pipes with the same outer diameter specification can be met by one joint, and the bursting test requirements of pipes with different wall thicknesses under the same outer diameter can be met; pure mechanical sealing is achieved, high temperature and high pressure are resisted, and disassembly is convenient after sample test cracking; o-shaped ring sealing is avoided, the efficiency is improved, and the test cost is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of pipe detection, in particular to a pipe test fixture device. Background Art

[0002] The pipe bursting test machine is used to measure the pressure-resistant failure time or the maximum pressure value of instantaneous bursting of various pipes under long-term constant internal pressure and constant temperature. It is an essential testing equipment for pipe manufacturers and testing institutions.

[0003] During the test, the pipe needs to be sealed and fixed. The traditional method is to use an O-ring to connect with the inner diameter of the pipe for sealing and fixing. Since there are many types of wall thickness of copper pipes with the same outer diameter, the method of sealing with the inner diameter of the copper pipe requires many types of joints, which is not universal and not suitable for pipe manufacturers. Moreover, under high temperature and oil-resistant test conditions, ordinary O-rings cannot meet the temperature resistance requirements, resulting in many specifications of O-rings and high prices. Utility Model Content

[0004] The utility model provides a pipe test fixture device, aiming to solve the problems of seal loss and inability to withstand high temperature and high pressure caused by the existing O-ring seal fixation.

[0005] The utility model provides a pipe test fixture device, comprising an external fixing part, a fixing cap and a pipe clamping assembly, wherein a middle through hole with a tapered inclined surface is arranged inside the fixing cap, a through hole for liquid circulation is arranged in the center of the external fixing part, one end of the pipe is provided with a chamfer extending outward, the other end of the pipe passes through the middle through hole, the chamfer at one end of the pipe is clamped at the tapered inclined surface of the middle through hole, one end of the external fixing part is connected in the fixing cap and butted with the chamfer of the pipe, the through hole is communicated with the inside of the pipe, the pipe clamping assembly is connected with the fixing cap, and the pipe clamping assembly is sleeved on the outer wall of the pipe and presses the pipe.

[0006] As a further improvement of the present invention, a tapered joint is provided at the end of the external fixing member, and after the external fixing member is connected to the fixing cap, the joint fits and butts with the inner side of the chamfer of the pipe.

[0007] As a further improvement of the utility model, a spanner protrusion is provided on the external fixing member.

[0008] As a further improvement of the present invention, the outer surface of the end of the external fixing piece is provided with threads, the inner wall of the fixing cap is provided with threads, and the end of the external fixing piece is connected to the inner wall of the fixing cap through threads.

[0009] As a further improvement of the utility model, the tube clamping assembly includes an upper pressing block and a lower pressing block, the lower pressing block is connected to a fixing cap, the upper pressing block is detachably connected to the lower pressing block, the upper pressing block is provided with an upper arc groove, the lower pressing block is provided with a lower arc groove, and the tube is pressed between the upper arc groove and the lower arc groove.

[0010] As a further improvement of the present invention, a first mounting hole is provided on the back of the fixing cap, and a second mounting hole is provided on the pressing block. The first mounting hole is aligned with the second mounting hole and connected by a fastener.

[0011] As a further improvement of the present invention, the first mounting hole and the second mounting hole are threaded holes, and the fasteners are screws.

[0012] As a further improvement of the utility model, the upper pressing block is provided with a third mounting hole, the lower pressing block is provided with a fourth mounting hole, and the third mounting hole is aligned with the fourth mounting hole and connected by a fastener.

[0013] As a further improvement of the present invention, the third mounting hole and the fourth mounting hole are threaded holes, and the fasteners are screws.

[0014] The beneficial effects of the utility model are: strong versatility, one joint can meet the test requirements for pipes with the same outer diameter, and meet the bursting test requirements of pipes with different wall thicknesses under the same outer diameter; pure mechanical sealing, high temperature and high pressure resistance, and easy disassembly of samples after rupture during testing; no O-ring sealing is required, which improves efficiency, eliminates O-ring sealing loss, and saves test costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is the overall structural diagram of the pipe test fixture device of the utility model;

[0016] Figure 2 This is an exploded view of the structure of the pipe test fixture device of the utility model;

[0017] Figure 3 This is a structural sectional view of the pipe test fixture device of the utility model;

[0018] Figure 4 It is a structural cross-sectional view of the external fixing member of the utility model;

[0019] Figure 5 It is a structural sectional view of a fixing cap of the utility model. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0021] like Figures 1 to 5 As shown, a pipe test fixture device of the utility model comprises an external fixing member 1, a fixing cap 2, and a pipe clamping assembly 3. The fixing cap 2 is provided with a middle through hole 21 with a tapered inclined surface 22, and the center of the external fixing member 1 is provided with a through hole 11 for liquid circulation. One end of the pipe 4 is provided with a chamfer 41 extending outward, and the other end of the pipe 4 passes through the middle through hole 21. The chamfer 41 at one end of the pipe 4 is clamped at the tapered inclined surface 22 of the middle through hole 21. One end of the external fixing member 1 is connected to the fixing cap 2 and docked with the chamfer 41 of the pipe 4. The through hole 11 is communicated with the inside of the pipe 4. The pipe clamping assembly 3 is connected to the fixing cap 2, and the pipe clamping assembly 3 is sleeved on the outer wall of the pipe 4 and presses the pipe 4.

[0022] The fixing cap 2 uses the middle through hole 21 with a tapered slope 22 to make a preliminary positioning and assembly of the installation position of the pipe 4. Before the test, one end of the pipe 4 will be beveled into a trumpet-shaped chamfer 41 that expands outwards with a tool. When it is transferred to the fixing cap 2, the chamfer 41 can fit on the tapered slope. The clamping assembly 3 is connected to the back of the fixing cap 2 to press the pipe 4 exposed from the fixing cap 2 to prevent the pipe 4 from shaking during the test. The external fixing part 1 is assembled into the fixing cap 2 from the front end of the fixing cap 2. After assembly, the outer wall of the external fixing part 1 is sealed and docked with the inner wall 23 of the fixing cap 2, and the test joint end of the pipe 4 is purely mechanically sealed. At the same time, one end of the through hole 11 in the external fixing part 1 is connected to the pipe 4, and the other end is connected to the external liquid supply equipment. The external liquid enters the pipe 4 through the through hole 11 to test the pipe 4.

[0023] The end of the external fixture 1 is provided with a taper joint 12. After the external fixture 1 is connected to the fixing cap 2, the joint 12 is fitted and docked with the inner side of the chamfer 41 of the pipe 4. The taper of the joint 12 on the external fixture 1 matches the taper of the chamfer 41 of the pipe 4. After the external fixture 1 is sealed and docked with the fixing cap 2, the joint 12 of the external fixture 1 is sealed and fitted with the chamfer 41 of the pipe 4, thereby further achieving a sealing effect at one end of the pipe 4. In this way, during the test, the liquid passing through the through hole 11 will directly flow into the inside of the pipe 4, and will not overflow from the edge of the interface to cause test errors.

[0024] The external fixing member 1 is provided with a spanner protrusion 13. Since the external fixing member 1 is provided with a spanner position, the external fixing member 1 can be tightened, assembled or disassembled with the help of a spanner, which is convenient for operation.

[0025] The outer surface 14 of the end of the external fixing member 1 is provided with a thread, and the inner wall 23 of the fixing cap 2 is provided with a thread, and the end of the external fixing member 1 is connected to the inner wall 23 of the fixing cap 2 by a thread. The central thread of the fixing cap 2 is the same as the outer thread of the external fixing member 1, and the external fixing member 1 and the fixing cap 2 are butted together by thread engagement, and the multi-layer structure formed by the thread matching achieves a sealing effect at the joint between the external fixing member 1 and the fixing cap 2.

[0026] Both ends of the external fixing member 1 are provided with taper joints 12, and the outer surface 14 of each end has corresponding threads. Both ends can be used for fixed connection, and the spanner protrusion 13 is arranged in the middle of the threads at both ends.

[0027] The tube clamping assembly 3 includes an upper pressing block 5 and a lower pressing block 6. The lower pressing block 6 is connected to the fixing cap 2. The upper pressing block 5 is detachably connected to the lower pressing block 6. The upper pressing block 5 is provided with an upper arc groove 51. The lower pressing block 6 is provided with a lower arc groove 61. The tube 4 is pressed between the upper arc groove 51 and the lower arc groove 61. The tube clamping assembly 3 is divided into two parts, the upper part is a detachable upper pressing block 5, and the lower part is a lower pressing block 6 connected to the back of the fixing cap 2. The lower pressing block 6 can be fixed to the back of the fixing cap 2 all the time. When replacing the test tube 4, there is no need to disassemble or loosen the lower pressing block 6. Only the upper pressing block 5 needs to be disassembled or loosened to complete the replacement of the tube 4. The curvature of the upper arc groove 51 and the lower arc groove 61 matches the curvature of the cylindrical side surface of the tube 4. After the other end of the tube 4 passes through the fixing cap 2, one side of the tube 4 will fit against the lower arc groove 61. When the upper pressing block 5 and the lower pressing block 6 are fixedly installed, the upper arc groove 51 will fit against the other side of the tube 4 and squeeze the tube 4 to fix it.

[0028] The back of the fixing cap 2 is provided with a first mounting hole 24, and the lower pressing block 6 is provided with a second mounting hole 62. The first mounting hole 24 is aligned with the second mounting hole 62 and connected by a fastener. The first mounting hole 24 and the second mounting hole 62 are threaded holes, and the fastener is a screw. The threaded hole on the back of the fixing cap 2 is used to align with the threaded hole of the lower pressing block 6, and the two threaded holes are fixed by screws.

[0029] The upper pressing block 5 is provided with a third mounting hole 52, and the lower pressing block 6 is provided with a fourth mounting hole. The third mounting hole 52 is aligned with the fourth mounting hole and connected by a fastener. The third mounting hole 52 and the fourth mounting hole are threaded holes, and the fastener is a screw. After the threaded holes between the upper pressing block 5 and the lower pressing block 6 are aligned, they are tightened and fixed with screws. When the sample of the pipe 4 is compressed and expanded and ruptured during the test, the upper pressing block 5 is first loosened, and then the sample pipe 4 is taken out.

[0030] The installation sequence of this pipe test fixture device is:

[0031] Step 1: Use a tool to bend one end of the steel pipe 4 into a trumpet shape;

[0032] Step 2: Screw the pressing block 6 of the clamp assembly 3 onto the back of the fixing cap 2, and then insert the pipe 4 from one end of the fixing cap 2;

[0033] Step 3: Tighten the external fixing member 1 and the fixing cap 2 so that the conical joint 12 of the external fixing member 1 and the conical chamfer 41 on the pipe 4 are matched and sealed;

[0034] The fourth step is to lock the upper pressing block 5 of the tube clamping assembly 3 with the lower pressing block 6 to fix the tube 4.

[0035] The pipe test fixture can be used for automobile parts testing, pipe pressure resistance and burst testing, and has strong versatility. The same outer diameter pipe can meet the test requirements with one joint 12; it is resistant to high temperature and high pressure, has no O-ring sealing loss, and saves test costs, improves detection efficiency and reduces work intensity.

[0036] The above contents are further detailed descriptions of the present invention in combination with specific preferred implementations, and the specific implementation of the present invention cannot be considered to be limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. A pipe test fixture device, characterized in that: It includes an external fixing part, a fixing cap, and a tube clamping assembly. The fixing cap is provided with a middle through hole with a tapered slope. The center of the external fixing part is provided with a through hole for liquid circulation. One end of the tube is provided with a chamfer extending outward. The other end of the tube passes through the middle through hole. The chamfer at one end of the tube is stuck at the tapered slope of the middle through hole. One end of the external fixing part is connected to the fixing cap and docked with the chamfer of the tube. The through hole is connected to the inside of the tube. The tube clamping assembly is connected to the fixing cap. The tube clamping assembly is sleeved on the outer wall of the tube and presses the tube.

2. The pipe test fixture device according to claim 1, characterized in that: The end of the external fixing piece is provided with a taper joint. After the external fixing piece is connected to the fixing cap, the joint is butted against the inner side of the chamfer of the pipe.

3. The pipe test fixture device according to claim 1, characterized in that: The external fixing member is provided with a spanner protrusion.

4. The pipe test fixture device according to claim 1, characterized in that: The outer surface of the end of the external fixing piece is provided with a thread, the inner wall of the fixing cap is provided with a thread, and the end of the external fixing piece is connected to the inner wall of the fixing cap through the thread.

5. The pipe test fixture device according to claim 1, characterized in that: The tube clamping assembly includes an upper pressing block and a lower pressing block, wherein the lower pressing block is connected to a fixing cap and is detachably connected to the lower pressing block. The upper pressing block is provided with an upper arc groove, and the lower pressing block is provided with a lower arc groove, and the tube is pressed between the upper arc groove and the lower arc groove.

6. The pipe test fixture device according to claim 5, characterized in that: The back of the fixing cap is provided with a first mounting hole, and the pressing block is provided with a second mounting hole. The first mounting hole is aligned with the second mounting hole and connected by a fastener.

7. The pipe test fixture device according to claim 6, characterized in that: The first mounting hole and the second mounting hole are threaded holes, and the fasteners are screws.

8. The pipe test fixture device according to claim 5, characterized in that: The upper pressing block is provided with a third mounting hole, the lower pressing block is provided with a fourth mounting hole, the third mounting hole is aligned with the fourth mounting hole and connected by a fastener.

9. The pipe test fixture device according to claim 8, characterized in that: The third mounting hole and the fourth mounting hole are threaded holes, and the fasteners are screws.

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