Single-tube pressure test device for heat exchange tube of heat exchanger

Abstract

The utility model relates to the field of heat exchangers, in particular to a single-tube pressure test device for a heat exchange tube of a heat exchanger, and the single-tube pressure test device for the heat exchange tube of the heat exchanger comprises a pressure test platform, a water circulation system and a pressurizing device, the water circulation system is used for injecting water into and discharging water from the heat exchange tube, the pressure testing device is used for pressurizing the heat exchange tube, and the water circulation system is communicated with the pressurizing device and is used for injecting water into and pressurizing the heat exchange tube. The pressurizing device is used only when the heat exchange tube is pressurized, and the water circulation system is used when water is poured into the heat exchange tube, so that the purpose of improving the pressure testing efficiency of the heat exchange tube is achieved.

Description

Technical Field

[0001] The present application relates to the field of pipeline pressure testing, and in particular to a single-tube pressure testing device for a heat exchange tube of a heat exchanger. Background Art

[0002] At present, the heat exchange tube is one of the important components of the heat exchanger. It is placed inside the heat exchanger cylinder and is used for heat exchange between two media. It has high thermal conductivity and good isothermal properties. The heat exchange tube is a device that can quickly transfer heat energy from one point to another. The heat exchange tube must be pressure tested before leaving the factory to ensure that the heat exchange tube meets the equipment working requirements when working.

[0003] In the existing pressure test of the heat exchange tube, water injection and pressurization of the heat exchange tube are directly performed by using a pressure pump.

[0004] The above-mentioned prior art solutions have the following defects: the pressure test is directly operated by a pressure pump, and the pressure pump takes a long time to inject water into the heat exchange tube, resulting in low working efficiency. Utility Model Content

[0005] In order to improve the efficiency of the heat exchange tube pressure test, the present application provides a single tube pressure test device for a heat exchanger tube.

[0006] The above technical objectives of this application are achieved through the following technical solutions:

[0007] A single-tube pressure test device for a heat exchanger tube of a heat exchanger, the pressure test device comprising a pressure test platform, a water circulation system and a pressurizing device. The pressure test platform is used to clamp and seal the heat exchange tube, the water circulation system is used to inject water into and drain water from the heat exchange tube, the pressure test device is used to pressurize the heat exchange tube, and the water circulation system and the pressurizing device are connected and arranged to inject water into and pressurize the heat exchange tube.

[0008] By adopting the above scheme, the pressure test device includes a pressure test platform, a water circulation system and a pressurizing device. When the heat exchange tube is pressure tested, the heat exchange tube is placed on the pressure test platform, the pressure test platform fixes the heat exchange tube, and the water inlet and outlet of the heat exchange tube are connected to the water circulation system. After the connection is completed, the heat exchange tube is filled with water through the water circulation system. After the heat exchange tube is filled with water, the pressurizing device is started to pressurize the heat exchange tube. After pressurization, the pressure resistance of the heat exchange tube is observed. After the test is completed, the water flow in the heat exchange tube is drained through the water circulation system, and the heat exchange tube is removed from the pressure test platform to complete the pressure test of the heat exchange tube. This application only uses the pressurizing device when pressurizing the heat exchange tube, and uses the water circulation system when pouring water into the heat exchange tube, thereby achieving the purpose of improving the efficiency of the pressure test of the heat exchange tube.

[0009] Furthermore, the pressure test platform includes a placement plate, a clamping device, a sealing device and a pushing mechanism. The clamping device and the pushing mechanism are both fixedly connected to the placement plate. The sealing device is slidably connected to the placement plate. The clamping device is used to fix the heat exchange tube, the sealing device is used to connect the heat exchange tube with the water circulation system, and the pushing mechanism is used to push the sealing device to seal the heat exchange tube.

[0010] By adopting the above scheme, when the heat exchange tube is pressure tested, the heat exchange tube is placed on the placement plate, and the clamping device tightens the heat exchange tube to prevent the heat exchange tube from being separated from the sealing device due to the pressure when the heat exchange tube is pressurized. The sealing device is slidably connected to the placement plate, and the sealing device is arranged at the water inlet and water outlet of the heat exchange tube. The sealing device is used to connect the water inlet and water outlet of the heat exchange tube to the water circulation system. The pushing mechanism is fixedly connected to the placement plate, and the pushing mechanism is used to push the sealing device so that the sealing device slides on the placement plate, thereby sealing the water inlet and water outlet of the heat exchange tube.

[0011] Furthermore, the clamping device includes a clamping plate, a supporting plate and fastening screws. The supporting plate is fixedly connected to the storage plate. The clamping plate is located at one end of the supporting plate away from the storage plate. The clamping plate and the supporting plate are used to clamp the heat exchange tube. The clamping plate and the supporting plate are connected using fastening screws.

[0012] By adopting the above scheme, the clamping device is used to clamp and fix the heat exchange tube, the heat exchange tube is placed between the clamping plate and the supporting plate, the clamping plate and the supporting plate are connected by fastening screws, the fastening screws are threadedly connected to the clamping plate, the fastening screws pass through the clamping plate and are inserted into the supporting plate, so that the clamping plate and the supporting plate are fixedly connected, when placing or removing the heat exchange tube, the fastening screws can be rotated to adjust the distance between the clamping plate and the supporting plate, so that the heat exchange tube can be taken out from between the clamping plate and the supporting plate.

[0013] Furthermore, the sealing device includes a sealing plate and a connecting pipe, the sealing plate is slidably connected to the storage plate, the connecting pipe is buried in the sealing plate, one end of the connecting pipe is used to connect to the heat exchange pipe, and the end of the connecting pipe away from the heat exchange pipe is used to connect to the water circulation system.

[0014] By adopting the above scheme, sealing plates are provided at the water inlet and outlet ends of the heat exchange tube, the sealing plates are fixedly connected to the storage plates, a connecting pipe is buried in the sealing plates, one end of the connecting pipe is fixedly connected to the heat exchange tube, and the end of the connecting pipe away from the heat exchange tube is fixedly connected to the water circulation system. The sealing device connects the heat exchange tube with the water circulation system, so that when the heat exchange tube is pressure tested and water is injected into the heat exchange tube, water can flow into the heat exchange tube through the water circulation system, and after the pressure test is completed, the water in the heat exchange tube can also be discharged through the water circulation system.

[0015] Furthermore, the pushing mechanism includes a baffle, a tripod and a top screw. The baffle is fixedly connected to the storage plate, the top screw is threadedly connected to the baffle, the end of the top screw away from the baffle is rotatably connected to the blocking plate, and a tripod is set at the end of the baffle away from the blocking plate, and the tripod is fixedly connected to the baffle and the storage plate.

[0016] By adopting the above scheme, when the heat exchange tube is pressure tested, the heat exchange tube is fixed on the placement plate and connected to the water circulation system, and then the top screw is rotated. The top screw can push the sealing plate to slide on the placement plate, so that the connection between the heat exchange tube and the connecting tube is more fitted, so that when the heat exchange tube is filled with water and pressurized, the connection between the heat exchange tube and the connecting tube will not be disconnected due to the impact of water flow or pressure. A tripod is set at the end of the baffle away from the top screw to make the baffle more stable.

[0017] Furthermore, the water circulation system includes an injection pipe, a drainage pipe and a water tank. The heat exchange tube is provided with a water inlet end and a water outlet end. The injection pipe is arranged between the water inlet end and the water tank. The two ends of the injection pipe are respectively fixedly connected to the water inlet end and the water tank. The drainage pipe is arranged between the water outlet end and the water tank. The two ends of the drainage pipe are respectively fixedly connected to the water tank and the water outlet end. A drainage valve is arranged on the drainage pipe. A water injection valve and a pressure maintaining valve are arranged on the injection pipe.

[0018] By adopting the above scheme, the two ends of the water injection pipe are fixedly connected to the water inlet end of the heat exchange tube and the water tank respectively, and the two ends of the drainage pipe are fixedly connected to the water outlet end of the heat exchange tube and the water tank respectively. The water injection pipe is provided with a water injection valve and a pressure maintaining valve, and the drainage pipe is provided with a drainage valve. When the heat exchange tube is pressure tested, the water injection and pressure maintaining valves are opened, and the drainage valve is closed. Water can flow from the water tank through the water injection pipe into the heat exchange tube. After the heat exchange tube is filled with water, the water injection valve is closed to pressurize the heat exchange tube. After the pressure reaches the rated value, the pressure maintaining valve is closed to maintain the pressure of the heat exchange tube. After the test is completed, the drainage valve is opened, and the water in the heat exchange tube can flow back to the water tank through the drainage pipe, thereby completing the pressure test of the heat exchange tube.

[0019] Furthermore, the pressurizing device includes a pressurizing pipe and a pressurizing pump. The pressurizing pipe is arranged between the pressure maintaining valve and the water injection valve. One end of the pressurizing pipe is fixedly connected to the water injection pipe, and the end of the pressurizing pipe away from the water injection pipe is fixedly connected to the pressurizing pump.

[0020] By adopting the above scheme, the pressure-boosting pipe is arranged between the pressure-boosting valve and the pressure-maintaining valve, the pressure-boosting pipe is fixedly connected to the water injection pipe, the end of the pressure-boosting pipe away from the water injection pipe is fixedly connected to the pressure pump, the pressure-boosting valve is arranged on the pressure-boosting pipe, and there is a passage between the water injection pipe and the pressure-boosting pipe. When the heat exchange tube is injected with water, the water injection valve is opened, the pressure-boosting valve is closed, and the water injection valve is closed after the heat exchange tube is filled with water. The pressure-boosting valve is opened to pressurize the heat exchange tube.

[0021] Furthermore, the booster pump is also connected to an exhaust pipe, which is arranged between the booster pump and the water outlet, with both ends of the exhaust pipe fixedly connected to the booster pump and the water outlet respectively, and an exhaust valve is arranged on the exhaust pipe.

[0022] By adopting the above scheme, the two ends of the exhaust pipe are respectively connected to the pressure pump and the water outlet, and an exhaust valve is provided on the exhaust pipe. When the heat exchange tube is filled with water, the exhaust valve is opened to discharge the gas in the heat exchange tube. The exhaust pipe is connected to the drain pipe and the water outlet. A pressure gauge is provided at the end of the exhaust pipe away from the drain pipe, and the pressure gauge is used to measure the pressure in the heat exchange tube.

[0023] In summary, this application has the following technical effects:

[0024] By setting up a pressure test device, when the heat exchange tube is pressure tested, the heat exchange tube is placed on the pressure test platform, the pressure test platform fixes the heat exchange tube, and the water inlet and outlet of the heat exchange tube are connected to the water circulation system. After the connection is completed, the heat exchange tube is filled with water through the water circulation system. After the heat exchange tube is filled with water, the pressurizing device is started to pressurize the heat exchange tube. After pressurization, the pressure resistance of the heat exchange tube is observed. After meeting the requirements, the water flow in the heat exchange tube is drained through the water circulation system, and the heat exchange tube is removed from the pressure test platform, and the pressure test of the heat exchange tube is completed.

[0025] By setting a sealing device, when the heat exchange tube is pressure tested, the heat exchange tube is placed on the placement plate, and the pressing device tightens the heat exchange tube to prevent the heat exchange tube from being separated from the sealing device due to the pressure when the heat exchange tube is pressurized. The sealing device is slidably connected to the placement plate. The sealing device is set at the water inlet end and the water outlet end of the heat exchange tube. The sealing device is used to connect the water inlet end and the water outlet end of the heat exchange tube to the water circulation system. The pushing mechanism is fixedly connected to the placement plate. The pushing mechanism is used to push the sealing device so that the sealing device slides on the placement plate, thereby enhancing the sealing performance of the water inlet end and the water outlet end of the heat exchange tube and the sealing device;

[0026] A clamping device is provided, which is used to clamp and fix the heat exchange tube. The heat exchange tube is placed between the clamping plate and the supporting plate. The clamping plate and the supporting plate are connected by fastening screws. The fastening screws are threadedly connected to the clamping plate. The fastening screws pass through the clamping plate and are inserted into the supporting plate, so that the clamping plate and the supporting plate are fixedly connected. When placing or removing the heat exchange tube, the fastening screws can be rotated to adjust the gap between the clamping plate and the supporting plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a structural schematic diagram of a single-tube pressure test device for a heat exchange tube of a heat exchanger in the present application;

[0028] Figure 2This is a top view of a single-tube pressure test device for a heat exchange tube of a heat exchanger according to the present application;

[0029] Figure 3 is a cross-sectional view of the clamping device of the present application;

[0030] Figure 4 is a cross-sectional view of the sealing device at the water outlet end of the heat exchange tube of the present application;

[0031] Figure 5 It is a cross-sectional view of the sealing device at the water inlet end of the heat exchange tube of the present application.

[0032] In the figure, 1. pressure test platform; 11. storage plate; 12. clamping device; 121. bearing plate; 1211. bearing groove; 122. clamping plate; 1221. clamping groove; 123. fastening bolt; 13. sealing device; 131. blocking plate; 1311. connecting groove; 1312. connecting pipe; 1314. sealing gasket; 14. pushing mechanism; 141. baffle; 142. top screw; 143. tripod; 2. water circulation system; 21. water injection pipe; 211. water injection valve; 212. pressure maintaining valve; 22. drain pipe; 221. drain valve; 23. water tank; 24. exhaust pipe; 241. exhaust valve; 3. pressurizing device; 31. pressurizing pipe; 311. pressurizing valve; 32. pressurizing pump. DETAILED DESCRIPTION

[0033] The present application is further described in detail below in conjunction with the accompanying drawings.

[0034] Reference Figure 1 The present embodiment provides a single-tube pressure test device for a heat exchanger heat exchange tube, which includes a pressure test platform 1, a water circulation system 2 and a pressurizing device 3. The pressure test platform 1 is used to clamp the heat exchange tube and connect the heat exchange tube with the water circulation system 2. The water circulation system 2 is used to inject water into the heat exchange tube. The pressurizing device 3 is used to pressurize the heat exchange. The pressure test platform 1, the water circulation system 2 and the pressurizing device 3 work together to complete the pressure test of the heat exchange tube.

[0035] Reference Figure 1 and Figure 3 The pressure test platform 1 includes a placement plate 11, a clamping device 12 and a sealing device 13. The heat exchange tube is arranged on the placement plate 11. The heat exchange tube includes a water inlet end and a water outlet end. The water inlet end and the water outlet end are both provided with a sealing device 13. Each sealing device 13 is correspondingly provided with a clamping device 12 and a pushing mechanism 14. The clamping device 12 and the pushing mechanism 14 are both fixedly connected to the placement plate 11. The sealing device 13 is slidably connected to the placement plate 11. The clamping device 12 is used to fix the heat exchange tube, and the pushing mechanism 14 is used to push the sealing device 13 to seal the heat exchange tube.

[0036] The clamping device 12 includes a bearing plate 121, a clamping plate 122 and a fastening bolt 123. The bearing plate 121 is fixedly connected to the storage plate 11. A bearing groove 1211 is provided at one end of the bearing plate 121 away from the storage plate 11 for placing the heat exchange tube. The clamping plate 122 is placed at one end of the bearing plate 121 away from the storage plate 11. A clamping groove 1221 is provided on the clamping plate 122. The clamping groove 1221 is used to abut against the heat exchange tube. The fastening bolt 123 passes through the clamping plate 122 and is fixedly connected to the bearing plate 121, so that the clamping plate 122 is fixedly connected to the bearing plate 121. In this embodiment, at least two fastening bolts 123 are provided.

[0037] Reference Figure 1 and Figure 4 Each sealing device 13 includes a sealing plate 131 and a connecting pipe 1312. The sealing plate 131 is slidably connected to the storage plate 11. The connecting pipe 1312 is buried in the sealing plate 131. The sealing plate 131 is provided with a connecting groove 1311. The connecting groove 1311 is plugged into the heat exchange tube. A sealing gasket 1314 is provided at the contact point between the connecting groove 1311 and the heat exchange tube. The end of the connecting pipe 1312 away from the connecting groove 1311 is used to connect with the water circulation system 2.

[0038] Reference Figure 5 The pushing mechanism 14 is used to push the blocking plate 131 so that the blocking plate 131 slides on the storage plate 11. Each pushing mechanism 14 includes a baffle 141, a top screw 142 and a tripod 143. The baffle 141 is fixedly connected to the storage plate 11. The top screw 142 is threadedly connected to the baffle 141. One end of the top screw 142 passes through the baffle 141 and is rotatably connected to the blocking plate 131. The tripod 143 is arranged on a side of the baffle 141 away from the blocking plate 131. The tripod 143 is fixedly connected to the baffle 141 and the storage plate 11. The tripod 143 is used to support and fix the baffle 141.

[0039] Reference Figure 2 and Figure 5 The water circulation system 2 includes a water injection pipe 21, a drainage pipe 22 and a water tank 23. One end of the water injection pipe 21 and the drainage pipe 22 are fixedly connected to the water tank 23, and the ends of the water injection pipe 21 and the drainage pipe 22 away from the water tank 23 are respectively fixedly connected to two connecting pipes 1312. The water injection pipe 21 is connected to the water inlet end of the heat exchange tube through the connecting pipe 1312, and the drainage pipe 22 is connected to the water outlet end of the heat exchange tube through the connecting pipe 1312; a water injection valve 211 and a pressure maintaining valve 212 are provided on the water injection pipe 21, and a drainage valve 221 is provided on the drainage pipe 22.

[0040] Reference Figure 1 , Figure 2 and Figure 4The pressurizing device 3 includes a pressurizing pipe 31 and a pressurizing pump 32. The pressurizing pipe 31 is arranged between the pressure maintaining valve 212 and the water injection valve 211. One end of the pressurizing pipe 31 is connected to the water injection pipe 21, and the end of the pressurizing pipe 31 away from the water injection pipe 21 is fixedly connected to the pressurizing pump 32. A pressurizing valve 311 is provided on the pressurizing pipe 31, and the pressurizing pump 32 is also connected to an exhaust pipe 24. One end of the exhaust pipe 24 is fixedly connected to the pressurizing pump 32, and the end of the exhaust pipe 24 away from the pressurizing pump 32 is fixedly connected to the sealing plate 131. The pressurizing pipe 31 is connected to the water outlet end of the heat exchange tube through the sealing plate 131. A pressure gauge is also provided at the end of the connection between the pressurizing pipe 31 and the sealing plate 131 away from the connecting pipe 1312. The pressure gauge is used to test the pressure in the heat exchange tube.

[0041] The implementation principle of a single-tube pressure test device for a heat exchanger heat exchanger in an embodiment of the present application is as follows: when the heat exchange tube is pressure tested, the pressure test platform 1, the water circulation system 2 and the pressurizing device 3 work together to place the heat exchange tube on the pressure test platform 1, and the fastening bolts 123 are rotated so that the bearing plate 121 and the clamping plate 122 clamp the heat exchange tube to fix it, and then the top screw 142 is rotated, and the top screw 142 pushes the sealing plate 131 to move along the placement plate 11 in the direction close to the clamping device 12, so that the heat exchange tube is inserted into the connecting groove 1311 on the sealing plate 131, and the sealing plate 131 is used to seal the water inlet and outlet ends of the heat exchange tube, and then the exhaust valve is opened to maintain the pressure. Valve, water inlet valve, then close the drain valve 221 and the pressurizing valve 311, and inject the water in the water tank 23 into the heat exchange tube through the water injection pipe 21, so that the heat exchange tube is filled with water, and the gas in the heat exchange tube is discharged through the exhaust pipe 24. When the water flows out of the exhaust pipe 24, close the exhaust valve and the water inlet valve, and then open the pressurizing valve 311 to operate the pressurizing pump 32, observe the pressure test gauge, increase the pressure to the test pressure, close the pressure maintaining valve 212 to maintain the pressure, observe the pressure resistance of the heat exchange tube, and after the test is completed, open the drain valve 221 to recover the water to the water tank 23; after the pressure test is completed, rotate the fastening bolts 123 to separate the bearing plate 121 and the clamping plate 122, and take out the heat exchange tube.

[0042] This specific embodiment is merely an explanation of the present application and is not a limitation of the present application. After reading this specification, those skilled in the art may make modifications to the present embodiment without any creative contribution as needed, but such modifications are protected by the patent law as long as they are within the scope of the claims of the present application.

Claims

1. A single tube pressure test device for heat exchanger tubes, characterized in that: The pressure test device comprises a pressure test platform (1), a water circulation system (2) and a pressurizing device (3); the pressure test platform (1) is used to clamp and seal the heat exchange tubes; the water circulation system (2) is used to inject water into and drain water from the heat exchange tubes; the pressure test device is used to pressurize the heat exchange tubes; the water circulation system (2) and the pressurizing device (3) are connected and arranged to inject water into and pressurize the heat exchange tubes.

2. A single tube pressure test device for heat exchange tubes of a heat exchanger according to claim 1, characterized in that: The pressure test platform (1) comprises a placement plate (11), a clamping device (12), a sealing device (13) and a pushing mechanism (14); the clamping device (12) and the pushing mechanism (14) are both fixedly connected to the placement plate (11); the sealing device (13) is slidably connected to the placement plate (11); the clamping device (12) is used to fix the heat exchange tube; the sealing device (13) is used to connect the heat exchange tube with the water circulation system (2); and the pushing mechanism (14) is used to push the sealing device (13) to seal the heat exchange tube.

3. A single tube pressure test device for heat exchange tubes of a heat exchanger according to claim 2, characterized in that: The clamping device (12) comprises a clamping plate (122), a bearing plate (121) and fastening screws; the bearing plate (121) is fixedly connected to the storage plate (11); the clamping plate (122) is located at one end of the bearing plate (121) away from the storage plate (11); the clamping plate (122) and the bearing plate (121) are used to clamp the heat exchange tube; the clamping plate (122) and the bearing plate (121) are connected by fastening screws.

4. The single-tube pressure test device for heat exchange tubes of a heat exchanger according to claim 2, characterized in that: The sealing device (13) comprises a sealing plate (131) and a connecting pipe (1312); the sealing plate (131) is slidably connected to the storage plate (11); the connecting pipe (1312) is buried in the sealing plate (131); one end of the connecting pipe (1312) is used for connecting to a heat exchange pipe; and the end of the connecting pipe (1312) away from the heat exchange pipe is used for connecting to a water circulation system (2).

5. A single-tube pressure test device for heat exchange tubes of a heat exchanger according to claim 4, characterized in that: The pushing mechanism (14) comprises a baffle (141), a tripod (143) and a top screw (142); the baffle (141) is fixedly connected to the storage plate (11); the top screw (142) is threadedly connected to the baffle (141); one end of the top screw (142) away from the baffle (141) is rotatably connected to the blocking plate (131); the tripod (143) is provided at one end of the baffle (141) away from the blocking plate (131); and the tripod (143) is fixedly connected to both the baffle (141) and the storage plate (11).

6. The single-tube pressure test device for heat exchanger tubes of a heat exchanger according to claim 1, characterized in that: The water circulation system (2) comprises a water injection pipe (21), a drainage pipe (22) and a water tank (23); the heat exchange pipe is provided with a water inlet end and a water outlet end; the water injection pipe (21) is provided between the water inlet end and the water tank (23); the two ends of the water injection pipe (21) are respectively fixedly connected to the water inlet end and the water tank (23); the drainage pipe (22) is provided between the water outlet end and the water tank (23); the two ends of the drainage pipe (22) are respectively fixedly connected to the water tank (23) and the water outlet end; the drainage pipe (22) is provided with a drainage valve (221); and the water injection pipe (21) is provided with a water injection valve (211) and a pressure retaining valve (212).

7. A single-tube pressure test device for heat exchange tubes of a heat exchanger according to claim 6, characterized in that: The pressurizing device (3) comprises a pressurizing pipe (31) and a pressurizing pump (32); the pressurizing pipe (31) is arranged between the pressure-maintaining valve (212) and the water injection valve (211); one end of the pressurizing pipe (31) is fixedly connected to the water injection pipe (21); and one end of the pressurizing pipe (31) away from the water injection pipe (21) is fixedly connected to the pressurizing pump (32).

8. The single-tube pressure test device for heat exchanger tubes of a heat exchanger according to claim 7, characterized in that: The booster pump is also connected to an exhaust pipe (24), which is arranged between the booster pump and the water outlet, with two ends of the exhaust pipe (24) fixedly connected to the booster pump and the water outlet respectively, and an exhaust valve (241) is arranged on the exhaust pipe (24).

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