A U-shaped tube liquid pressure test tool

Abstract

The utility model relates to mechanical technical technical field provides a kind of U-shaped tube hydraulic test tool, including left joint and right joint, left joint and right joint are provided with silk seat, nut and rubber pad, the rubber pad is fixedly installed on the silk seat bottom, the nut is set on the rubber pad top, the outer wall of the nut is connected with the inner wall of silk seat by thread, first flow channel is set through the nut, and mounting hole is set through the rubber pad and silk seat simultaneously, the nut is connected hydraulic test equipment by first flow channel, left joint and right joint are connected U-shaped tube orifice by mounting hole, adapt to high-pressure experimental equipment.

Description

Technical Field

[0001] This utility model relates to the field of mechanical technology, specifically to a U-shaped tube hydraulic testing fixture. Background Technology

[0002] U-tube heat exchangers are commonly used equipment in chemical production processes. In the manufacturing process of U-tube products, various steel pipes need to be bent into U-shaped tubes. During the bending process, the steel pipes may crack. Therefore, a hydraulic test must be performed on the U-tubes during the manufacturing process. In order to check whether the steel pipes have cracked after bending, water needs to be introduced to check whether the U-tubes leak, thereby detecting whether the U-tubes have cracked.

[0003] Currently, testing is conducted manually using pressure testing. The principle involves wrapping PTFE tape around both ends of a U-shaped tube to seal one end, while the other end is connected to a water pump for pressurization. The presence of cracks is determined by observing whether the U-shaped tube leaks. Smaller cracks will only leak when high-pressure liquid is introduced, but existing U-shaped tubes cannot be connected to high-pressure hydraulic testing equipment. Utility Model Content

[0004] The purpose of this utility model is to provide a U-shaped tube hydraulic testing fixture, including a left connector and a right connector. Both the left connector and the right connector are provided with a threaded seat, a threaded nut and a rubber pad. The rubber pad is fixedly installed at the bottom of the threaded seat, and the threaded nut is provided above the rubber pad. The outer wall of the threaded nut is connected to the inner wall of the threaded seat by a thread. A first flow channel is provided through the threaded nut, and a mounting hole is provided through the rubber pad and the threaded seat. The threaded nut is connected to the hydraulic testing equipment through the first flow channel, and the left connector and the right connector are connected to the U-shaped tube opening through the mounting hole.

[0005] A further configuration is made in which the wire seat, the wire nut, and the rubber pad are coaxially arranged.

[0006] Further configured, the wire seat is a hollow cylinder, and an installation hole is provided at the bottom of the wire seat.

[0007] A further configuration is provided, wherein the inner wall of the thread holder is provided with a first thread.

[0008] A further configuration is provided, wherein the rubber pad includes a base pad, a boss is fixedly provided above the base pad, and an installation hole is formed through the boss.

[0009] Further configuration includes a mounting hole with an annular groove on the boss.

[0010] A further configuration is provided in which a stepped groove is formed between the sidewall of the annular groove and the bottom pad, and the nut abuts against the stepped groove.

[0011] A further configuration includes a connector at the top of the nut, which is connected to a hydraulic testing device.

[0012] Further configuration involves providing a second thread on the sidewall of the nut.

[0013] A further feature is that a groove is created below the nut corresponding to the rubber pad.

[0014] The beneficial effects of one or more of the above technical solutions:

[0015] The fixture is divided into two parts: a left connector and a right connector. Each part has three components: a threaded seat, a rubber pad, and a threaded nut. The two ends of the U-shaped connector are inserted into the corresponding openings at the bottom of the threaded seat. The rubber pad is connected to the U-shaped tube through the mounting hole to achieve a seal. The hydraulic testing equipment is connected to the threaded nut. The hydraulic testing equipment is slowly pressurized to inject water into the U-shaped tube. After the pressure is increased to a certain level, the U-shaped tube is checked for leaks, cracks, deformation, and leakage. If there is no deformation or leakage, it is considered qualified. Attached Figure Description

[0016] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute a limitation thereof.

[0017] Figure 1 This is a schematic diagram of the structure of this utility model.

[0018] Figure 2 This is a schematic diagram of the connection structure of the left connector, right connector and U-shaped tube of this utility model.

[0019] In the diagram, 1 is the left connector; 2 is the right connector; 3 is the threaded seat; 4 is the threaded nut; 5 is the rubber pad; 6 is the first thread; 7 is the first flow channel; 8 is the mounting hole; 9 is the hydraulic testing equipment; 10 is the U-tube; 11 is the U-tube opening; 12 is the mounting hole; 13 is the second thread; 14 is the bottom pad; 15 is the boss; 16 is the mounting hole; 17 is the annular groove; 18 is the stepped groove; 19 is the connector; and 20 is the groove. Detailed Implementation

[0020] The specific implementation of this embodiment will now be described with reference to the accompanying drawings.

[0021] Reference Figure 1 A U-shaped tube hydraulic testing fixture includes a left connector 1 and a right connector 2. Both the left connector 1 and the right connector 2 are provided with a threaded seat 3, a threaded nut 4 and a rubber pad 5. The rubber pad 5 is fixedly installed at the bottom of the threaded seat 3, and the threaded nut 4 is provided above the rubber pad 5. The outer wall of the threaded nut 4 is connected to the inner wall of the threaded seat 3 by a thread. A first flow channel 7 is provided through the threaded nut 4, and a mounting hole 8 is provided through the rubber pad 5 and the threaded seat 3. The threaded nut 4 is connected to a hydraulic testing device 9 through the first flow channel 7, and the left connector 1 and the right connector 2 are connected to the U-shaped tube opening 11 through the mounting hole 8.

[0022] The wire seat 3, the wire nut 4, and the rubber pad 5 are coaxially arranged to ensure that the first flow channel 7 and the mounting hole 8 are coaxially arranged to ensure smooth liquid flow.

[0023] The thread holder 3 is a hollow cylinder with an installation hole 8 at the bottom. Since the thread holder 3 needs to house components such as the thread nut 4 and the rubber pad 5, space is required. The rubber pad 5 is fixedly installed at the bottom of the thread holder 3, and the thread nut 4 is connected to the thread holder 3 by threads.

[0024] Considering the inconsistent lengths of the U-tubes 10, the tightening length of the nut 4 can be adjusted. The inner wall of the nut 3 is provided with a first thread 6, and the side wall of the nut 4 is provided with a second thread 13. By rotating the nut 4, the space between the nut 4 and the nut 3 can be changed, thereby ensuring that the lengths of the U-tubes 10 placed in the space between the nut 4 and the nut 3 are different.

[0025] The rubber pad 5 includes a base pad 14, and a boss 15 is fixedly provided on the top of the base pad 14. An installation hole 8 is opened through the boss 15. The diameter of the installation hole 8 is smaller than the diameter of the U-shaped tube 10. After the U-shaped tube 10 is inserted, the side wall of the U-shaped tube 10 expands the installation hole 8, thereby causing the installation hole 8 to deform and thus achieve a seal.

[0026] The mounting hole 8 is surrounded by an annular groove 17 on the boss 15. The annular groove 17 has a certain depth, which can ensure that the pressurized water is buffered after being filled, and improve the uniformity of the pressurized water through the U-shaped pipe 10.

[0027] A stepped groove 18 is formed between the side wall of the annular groove 17 and the bottom pad 14. The nut 4 abuts against the stepped groove 18. After installation, the nut 4 is pressed on the stepped groove 18 to improve the sealing performance.

[0028] The top of the nut 4 is equipped with a connector 19, which is connected to the hydraulic testing equipment 9. The hydraulic equipment uses an existing electric pressure testing pump, model 4DSY-40.

[0029] A groove 20 is made below the nut 4 corresponding to the rubber pad 5. After the nut 4 and the seat 3 are installed, the nut 4 will interfere with the rubber pad 5 above the seat 3. Therefore, in order to avoid interference, a groove 20 is made below the nut 4 to ensure that the nut 4 and the seat 3 are installed to provide installation space for the rubber pad 5 and avoid interference.

[0030] The steps for using the experimental fixtures are as follows:

[0031] Insert the two U-shaped tube openings 11 of the U-shaped tube 10 into the mounting holes 8 of the left connector 1 and the right connector 2 respectively. Then push the U-shaped tube openings 11 into the mounting holes 8 of the rubber pad 5 until the U-shaped tube 10 is held in place by the nut 4. Then connect the top connector 19 of the nut 4 to the hydraulic testing equipment 9. The hydraulic testing equipment 9 slowly increases the pressure and injects water into the U-shaped tube 10. After the pressure is increased to a certain level, check whether the U-shaped tube 10 leaks water or cracks. If there is no deformation or leakage, it is qualified.

[0032] Although the specific embodiments of the present utility model have been described above in conjunction with the accompanying drawings, this is not intended to limit the scope of protection of the present utility model. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without creative effort based on the technical solution of the present utility model are still within the scope of protection of the present utility model.

Claims

1. A U-shaped tube hydraulic testing fixture, characterized in that, It includes a left connector and a right connector. Both the left connector and the right connector are provided with a threaded seat, a threaded nut and a rubber pad. The rubber pad is fixedly installed at the bottom of the threaded seat. The threaded nut is set above the rubber pad. The outer wall of the threaded nut is connected to the inner wall of the threaded seat by a thread. A first flow channel is set through the threaded nut. At the same time, a mounting hole is set through the rubber pad and the threaded seat. The threaded nut is connected to the hydraulic testing equipment through the first flow channel. The left connector and the right connector are connected to the U-shaped tube opening through the mounting hole.

2. The U-shaped tube hydraulic testing fixture according to claim 1, characterized in that, The wire seat, wire nut, and rubber pad are arranged coaxially.

3. The U-shaped tube hydraulic testing fixture according to claim 1, characterized in that, The wire seat is a hollow cylinder, and a first flow channel is opened at the bottom of the wire seat.

4. The U-shaped tube hydraulic testing fixture according to claim 1, characterized in that, The inner wall of the thread holder is provided with a first thread.

5. The U-shaped tube hydraulic testing fixture according to claim 1, characterized in that, The rubber pad includes a base pad, and a boss is fixedly provided on the top of the base pad, with a mounting hole through the boss.

6. The U-shaped tube hydraulic testing fixture according to claim 1, characterized in that, An annular groove is formed around the mounting hole and on the boss.

7. The U-shaped tube hydraulic testing fixture according to claim 1, characterized in that, A stepped groove is formed between the sidewall of the annular groove and the bottom pad, and the nut abuts against the stepped groove.

8. The U-shaped tube hydraulic testing fixture according to claim 1, characterized in that, A connector is provided at the top of the nut, and the connector is connected to the hydraulic testing equipment.

9. The U-shaped tube hydraulic testing fixture according to claim 1, characterized in that, A second thread is provided on the side wall of the nut.

10. A U-shaped tube hydraulic testing fixture according to claim 1, characterized in that, A groove is made below the nut corresponding to the rubber pad.

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