Pipeline high-temperature external pressure test platform

Abstract

The utility model discloses a pipeline high-temperature external pressure test platform, which comprises a sleeve main body, a high-temperature water tank, a rack, a flange cover and a test connecting pipe, the sleeve main body and the rack are arranged in the high-temperature water tank, a hanging ring is arranged on the rack, the sleeve main body is fixed on the rack, and the flange cover is fixed on the test connecting pipe. The flange cover is arranged at one end of the sleeve main body, the testing pipe is arranged in the sleeve main body, one end of the testing pipe is connected with the flange cover through the testing connecting pipe, the sleeve main body is provided with an exhaust port, a water filling port and a temperature measuring probe, and the flange cover is provided with a pressurizing water discharging port and a testing pipe communicating port. The problems that the external pressure of the pipeline is difficult to measure in a high-temperature water environment and the pipeline is easy to scald are solved; the test tube is heated by internal and external high-temperature water, so that the test speed is increased while the detection precision is ensured; and the flange is adopted for sealing, so that high external pressure can be applied without leakage, and the measurable range of the sample tube is greatly enlarged.

Description

Technical Field

[0001] The utility model relates to the technical field of plastic pipes, in particular to a high-temperature external pressure testing platform for pipes. Background Art

[0002] Plastic pipes will be subjected to some negative pressure in some working scenarios, that is, when the external pressure is greater than the internal pressure, and the failure form is buckling and flattening failure. Usually, the stress at the time of failure is less than the yield strength of the material. In order to test the critical instability external pressure values of pipes of different materials and different specifications and sizes at different temperatures, a platform with convenient operation and accurate detection is needed. CN204128906U discloses a PE pipe external pressure test device, which requires welding the end faces of the same material as a compression sealing cover, and the actual sealing effect is limited; it needs to be configured with flanges corresponding to the pipe specifications, which requires large investment and complex management; and no specific detection method at different temperatures is given. CN219810783U discloses a PE pipe external pressure detection device that simulates the flattening situation under working conditions by internal pressurization, but the force applied is in the form of a pressure plate, not a uniform load in the circumferential direction, and no specific detection method at different temperatures is given. At present, there is no plastic pipe detection platform that can detect the critical external pressure value of instability at different temperatures. Utility Model Content

[0003] In view of the above problems, the present invention aims to provide a pipeline high-temperature external pressure testing platform to solve the problem of difficult operation and easy burns when measuring pipeline external pressure in high-temperature water environment.

[0004] The technical problem solved by the present invention can be achieved by adopting the following technical solutions: a pipeline high-temperature external pressure test platform, including a sleeve body, a high-temperature water tank, a frame, a flange cover and a test connecting pipe, the sleeve body and the frame are arranged in the high-temperature water tank, the sleeve body is fixed on the frame, one end of the sleeve body is provided with a flange cover, the test tube is arranged inside the sleeve body, one end of the test tube is connected to the flange cover through the test connecting pipe, the sleeve body is provided with an exhaust port and a water inlet, and the flange cover is provided with a pressurized drain port.

[0005] The flange cover is provided with a test pipe communication port, and the test pipe communication port is connected to the test communication pipe.

[0006] One end of the test connecting pipe is threadedly connected to the flange cover, and the other end is threadedly connected to the end cap of the test pipe.

[0007] A temperature measuring probe is provided on the sleeve body.

[0008] The water injection port and the exhaust port have the same size.

[0009] One end of the sleeve body away from the flange cover is sealed by welding a sealing plate or a flange and a blind plate.

[0010] A lifting ring is provided on the upper part of the frame.

[0011] A V-shaped frame is provided on the upper portion of the frame, and the sleeve body is welded to the V-shaped frame.

[0012] Hot water is placed in the high-temperature water tank, and the hot water submerges the sleeve body.

[0013] Compared with the prior art, the present invention has the following beneficial effects: the present invention avoids the problems of difficult operation and easy burns in measuring the external pressure of the pipeline in a high-temperature water environment; by heating the test tube with high-temperature water inside and outside, the detection accuracy is ensured while the test speed is accelerated; by adopting flange sealing, very high external pressure can be applied without leakage, which greatly increases the measurable range of the sample tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural diagram of the utility model;

[0015] Figure 2 This is a structural diagram of the frame and sleeve body of the utility model;

[0016] Figure 3 It is a side view schematic diagram of the frame and sleeve body of the utility model;

[0017] In the figure: 1-high temperature water tank, 2-frame, 3-sleeve body, 4-flange cover, 5-test connecting pipe, 6-test pipe, 7-temperature probe, 8-lifting ring, 9-water inlet, 10-exhaust port, 11-pressurized drain port, 12-test pipe connecting port, 13-water level, 14-sealing plate or flange and blind plate, 15-support beam. DETAILED DESCRIPTION

[0018] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below with reference to specific illustrations.

[0019] In the description of the present invention, it should be understood that the terms "one end", "the other end", "outside", "upper", "inside", "horizontal", "coaxial", "center", "end", "length", "outer end", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0020] Combined with attachment Figures 1 to 3As shown, this embodiment discloses a pipeline high-temperature external pressure testing platform, comprising a high-temperature water tank 1, a frame 2, a sleeve body 3, a flange cover 4, and a test connecting pipe 5. The sleeve body 3 and the frame 2 are disposed within the high-temperature water tank 1, and the sleeve body 3 is fixed to the frame 2. Hot water is placed in the high-temperature water tank 1, submerging the sleeve body 3. A flange cover 4 is provided at one end of the sleeve body 3, and a test pipe 6 is disposed within the sleeve body 3. One end of the test pipe 6 is connected to the flange cover 4 via the test connecting pipe 5.

[0021] Since the external pressure value for plastic tube instability is large and it needs to be tested repeatedly at high temperature, the sleeve body 3 is made of metal tube, preferably stainless steel, which is much stronger than plastic tube and will not fail due to long-term and repeated testing; it has good thermal conductivity, and heat can be transferred from the outside to the sleeve more quickly. The end of the metal tube body away from the flange cover 4 is sealed with a welded sealing plate or a flange and a blind plate; the other end of the tube body is welded with a flange to match another flange cover. The metal tube body of the sleeve body 3 is provided with an exhaust port 10 and a water injection port 9. Water needs to be injected into the sleeve before testing. The exhaust port is used to quickly exhaust air during water injection and speed up the water injection speed. The thread sizes of the water injection port 9 and the exhaust port 10 are consistent, and their functions can be interchanged.

[0022] The flange cover 4 is machined on the flange blind plate and is flange-connected to the sleeve body 3. The flange cover 4 is provided with a test tube connecting port 12 and a pressurized drain port 11. When the test tube 6 is flattened in the sleeve body 3, the water medium in the test tube is almost incompressible and needs to be discharged in time to avoid affecting the test results. At the same time, the test tube also needs to be filled with water and heated so that the external pressure test can be performed under a balanced temperature inside and outside the test tube. Therefore, a test tube connecting port 12 is provided and connected to the outside of the sleeve body 3 through the test connecting pipe 5. The pressurized drain port 11 is used to connect the pressurized equipment hose. By continuously applying pressure until the test tube is flattened, the pressurized hose is disassembled and the water in the sleeve can be automatically discharged, so that the test tube 6 can be removed and replaced.

[0023] The flange cover 4 is provided with a test tube connection port 12, which is connected to the test tube connection port 12. The test tube connection port 12 can be a metal tube or a rigidity-reinforced composite tube such as a metal braided hose, and its external pressure resistance is higher than that of the test tube 6. One end of the test tube connection port 5 is threadedly connected to the flange cover 4, and the other end is threadedly connected to the end cap of the test tube 6.

[0024] The frame 2 is welded from standard profiles, boasting a flat bottom. It can be placed horizontally across the support beam 14 at the bottom of the high-temperature water tank 1 to avoid denting the bottom. A V-shaped frame is provided on the frame 2 to house and secure the sleeve body 3, which is welded to the V-shaped frame. A lifting ring is provided on the top of the frame 2 to facilitate lifting in and out of the high-temperature water tank. The sleeve body 3 is welded to the frame 2, and all welds on the frame 2 are full welds to prevent water from entering the hollow profiles, accelerating corrosion or adding weight.

[0025] The high-temperature water tank 1 is used to heat the water in the sleeve body 3 and the test tube 6 to the set value. The high-temperature water tank 1 can control the temperature to above 95°C. After the rack 2 and the sleeve body 3 are completely placed in the tank 1, the lid can be closed to keep warm. Water is added to maintain a constant water level, and the water level must submerge the sleeve body 3.

[0026] During the test, first remove the flange cover 4 outside the high-temperature water tank 1, and then thread the test tube 6 to the test connection port 12 on the flange cover 4 through the test connecting pipe 5. Then, place it into the sleeve body 3, and pressurize the flange cover 4 and the sleeve flange tightly. Then, fill the sleeve with water through the water inlet 9. After the water filling is completed, seal the water inlet 9 and the exhaust port 10. Then, lift the frame 2 and the sleeve and place them into the high-temperature water tank 1. The high-temperature water in the high-temperature water tank 1 enters the test tube 6 through the test connecting pipe 5. Observe the result of the temperature probe 7 in the sleeve. After a period of time after reaching the set temperature, start pressurization and stop until the pressure drops. Record the inflection point pressure value. After that, after the pressurization equipment is completely depressurized, remove the pressurization hose, lift the frame 2 to drain the water in the sleeve into the high-temperature water tank, then remove the flange cover 4 to remove the test tube 6 and enter the next test.

[0027] The utility model avoids the problems of difficult operation and easy burns in measuring the external pressure of the pipeline in a high-temperature water environment; by heating the test tube with high-temperature water inside and outside, the detection accuracy is ensured while the test speed is accelerated; the flange seal is adopted, and very high external pressure can be applied without leakage, which greatly increases the measurable range of the sample tube.

[0028] The above description is only a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Any simple modification, equivalent change or modification made to the above embodiment based on the technical principle of the present invention still falls within the scope of the technical solution of the present invention.

Claims

1. A pipeline high-temperature external pressure test platform, comprising a sleeve body (3), a high-temperature water tank (1), a frame (2), a flange cover (4) and a test connecting pipe (5), characterized in that: The sleeve body (3) and the frame (2) are arranged in a high-temperature water tank (1), the sleeve body (3) is fixed on the frame (2), one end of the sleeve body (3) is provided with a flange cover (4), a test tube (6) is arranged inside the sleeve body (3), one end of the test tube (6) is connected to the flange cover (4) through a test connecting tube (5), an exhaust port (10) and a water injection port (9) are provided on the sleeve body (3), and a pressurized drain port (11) is provided on the flange cover (4).

2. A pipeline high-temperature external pressure testing platform according to claim 1, characterized in that: The flange cover (4) is provided with a test tube communication port (12), and the test tube communication port (12) is connected to the test communication pipe (5).

3. The pipeline high-temperature external pressure testing platform according to claim 1, characterized in that: One end of the test connecting pipe (5) is threadedly connected to the flange cover (4), and the other end is threadedly connected to the end cap of the test pipe (6).

4. The pipeline high-temperature external pressure testing platform according to claim 1, characterized in that: A temperature measuring probe (7) is provided on the sleeve body (3).

5. The pipeline high-temperature external pressure testing platform according to claim 1, characterized in that: The water injection port (9) and the exhaust port (10) have the same size.

6. The pipeline high-temperature external pressure testing platform according to claim 1, characterized in that: One end of the sleeve body (3) away from the flange cover (4) is sealed by welding a sealing plate or a flange and a blind plate.

7. The pipeline high-temperature external pressure testing platform according to claim 1, characterized in that: A lifting ring (8) is provided on the upper portion of the frame (2).

8. The pipeline high-temperature external pressure testing platform according to claim 1, characterized in that: A V-shaped frame is provided on the upper portion of the frame (2), and the sleeve body (3) is welded to the V-shaped frame.

9. The pipeline high-temperature external pressure testing platform according to claim 1, characterized in that: Hot water is placed in the high-temperature water tank (1), and the hot water submerges the sleeve body (3).

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