CN220729591U - Vacuumizing leakage test system for heat exchanger - Google Patents
Vacuumizing leakage test system for heat exchanger Download PDFInfo
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- CN220729591U CN220729591U CN202322404079.1U CN202322404079U CN220729591U CN 220729591 U CN220729591 U CN 220729591U CN 202322404079 U CN202322404079 U CN 202322404079U CN 220729591 U CN220729591 U CN 220729591U
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- heat exchanger
- tube
- vacuum
- head cover
- leakage
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- 238000012360 testing method Methods 0.000 title claims abstract description 85
- 238000007789 sealing Methods 0.000 claims abstract description 17
- 238000005086 pumping Methods 0.000 claims abstract description 12
- 230000001105 regulatory effect Effects 0.000 claims description 8
- 210000002445 nipple Anatomy 0.000 claims description 5
- 238000004891 communication Methods 0.000 claims description 4
- 229910000589 SAE 304 stainless steel Inorganic materials 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 3
- 239000012945 sealing adhesive Substances 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 12
- 239000002351 wastewater Substances 0.000 abstract description 2
- 238000012423 maintenance Methods 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 238000010276 construction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000012824 chemical production Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 230000002706 hydrostatic effect Effects 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000013500 data storage Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Abstract
The utility model relates to a vacuum pumping leakage test system of a heat exchanger, which comprises a vacuum pump, a vacuum meter, a needle valve and a leakage test heat exchanger. The leakage test comprises the integral leakage test of the heat exchanger and the leakage test of a heat exchange single tube. The whole leak test of the heat exchanger is that the vacuum pump is connected to a quick connector on the A-shaped head cover through a hose, and the vacuum gauge and the needle valve are arranged on the hose. The A-type head cover and the B-type head cover are matched and installed on tube plates at two ends of the heat exchanger, and are sealed by sealing rubber strips to form a closed system. The heat exchange single tube leak test uses a leak test gun, the leak test gun comprises a gun head and a gun rod, the gun head is inserted into one end of the heat exchange single tube, the gun rod is connected with a vacuum pump through a hose, and the other end of the heat exchange single tube is blocked by a conical rubber plug. The leakage testing device is reasonably configured, and whether the tube bundle has leakage or not is identified by reading the pressure intensity value, so that the leakage testing device has the advantages of simplicity and convenience in operation, strong site adaptability, high leakage testing efficiency, short maintenance time, no wastewater in the leakage testing process and the like.
Description
Technical Field
The utility model belongs to the technical field of chemical production equipment, and relates to a vacuum pumping leakage test system of a heat exchanger.
Background
The heat exchanger is a heat exchange device, the tubular heat exchanger is the heat exchanger with the widest application in chemical production, and mainly comprises a shell, a tube plate, a heat exchange tube, an end socket, a baffle plate and the like. The shell is round, a parallel tube bundle is arranged in the shell, two ends of the tube bundle are fixed on the tube plate, two fluids for heat exchange in the tubular heat exchanger flow in the tube, and the stroke of the two fluids is called tube side. In the use process or before the use of the tubular heat exchanger, the tubular heat exchanger needs to be subjected to leakage test so as to prevent leakage.
In the prior art, a special tool is adopted for hydraulic test, water is injected into the heat exchanger, and whether the heat exchanger is damaged or not is judged by observing where water leaks, so that the leakage test is insufficient: (1) the tool for pressure test is complex and various in model, needs to be matched with multiple tools and multiple persons, is transported back and forth for multiple times, consumes a long time for pressure test (each time is 6-8 hours according to the size), and is low in efficiency. (2) The hydraulic test has high leak detection pressure and high risk, and can cause safety production accidents if being slightly careless. (3) The water consumption for leak detection in the hydrostatic test is large, so that the pollution discharge capacity is large, and the environmental protection pressure is high. (4) Most of water in the hydrostatic test is fire-fighting water which can not meet the SH/T3532-2005 requirement, the chloride ion content is uncontrollable, and the residual water can cause the corrosion of the tube bundle.
Disclosure of Invention
The utility model aims to provide a vacuum pumping leakage test system for a heat exchanger, which is used for reasonably configuring leakage test equipment, optimizing the structure of the leakage test system, saving construction time and improving leakage test efficiency. The leakage test process does not use water, so that sewage is prevented from being discharged, and industrial pollution is reduced.
The technical scheme of the utility model is as follows: the heat exchanger vacuumizing leakage test system comprises a vacuum pump, a vacuum meter, a needle valve and a leakage test heat exchanger. The heat exchanger is a shell-and-tube heat exchanger or a shell-and-tube heat exchanger, the shell-and-tube heat exchanger comprises a shell, a tube bundle, a tube plate, a seal head and a baffle plate, and the tube bundle consists of heat exchange single tubes. The leakage test comprises the integral leakage test of the heat exchanger and the leakage test of a heat exchange single tube. The heat exchanger is integrally tested to leak and uses A-type head cover and B-type head cover, A-type head cover has air vent, the air vent is equipped with the quick-operation joint, the vacuum pump is connected to the quick-operation joint on A-type head cover through the hose, the vacuum gauge, needle valve are installed on hose. The A-type head cover and the B-type head cover are matched and installed on tube plates at two ends of the heat exchanger, and are sealed by sealing rubber strips to form a closed system. The heat exchange single tube leak test uses the leak test rifle, and the leak test rifle includes rifle head and culvert, and the rifle head inserts the one end of heat exchange single tube, and the culvert passes through the hose to be connected with the vacuum pump, and vacuum gauge, needle valve are installed on the hose, and another end of heat exchange single tube is with cone type plug jam.
The system for performing heat exchange single tube leakage test comprises a main pipe and 2-20 branches, wherein a vacuum pump is connected with the branches through the main pipe, the branches are connected with leakage test guns, and each branch is provided with a vacuum meter and a needle valve for simultaneously performing leakage test on the heat exchange single tubes of a plurality of heat exchangers.
The A-type head cover and the B-type head cover are of seal head type structures of the shell-and-tube heat exchanger and are formed by pressing delta=2mm-304 steel plates. The diameters of the A-type head cover and the B-type head cover are 300-3000 mm. One end of the quick connector is provided with a nipple, the other end is provided with threads, and the middle is of a hexagonal nut structure.
The vacuum gauge is a wireless intelligent digital pressure transmitter, and the needle valve is a needle type regulating valve. The system is provided with a controller and a display device. The controller is in communication with the vacuum pump, the wireless intelligent digital pressure transmitter, the needle type regulating valve and the display device. The controller is a PLC or a DCS, and the display equipment is a mobile phone or a computer.
The evacuation leak test system of the heat exchanger is reasonably provided with leak test equipment, and whether the tube bundle is damaged or not is identified by reading the pressure value. Compared with the prior art, the utility model has the beneficial effects that: (1) the structure of the leak testing system is optimized, the operation is simple and convenient, the site adaptability is strong, and the leak testing operation of different sites and different positions can be realized; (2) the overhaul pressure test engineering quantity of the heat exchanger is reduced by 70%, the leak test efficiency is improved, and the overhaul time is shortened; (3) the construction work amount is reduced, and the construction time is saved; (4) the leak test process has no waste water and no environmental protection problem. (5) The leakage test device can be used for carrying out the integral leakage test of the heat exchanger and the single heat exchange tube leakage test.
Drawings
FIG. 1 is a schematic diagram of a leak test connection of a heat exchange single tube;
FIG. 2 is a schematic diagram of simultaneous leak test connection of multiple heat exchange single tubes;
FIG. 3 is a schematic diagram of an overall vacuuming leak test of the heat exchanger;
FIG. 4 is a schematic view of a heat exchanger;
fig. 5 is a schematic structural view of the quick connector.
Wherein: 1-vacuum pump, 2-vacuum meter, 3-tube plate, 4-tube bundle, 5-needle valve, 6-A type head cover, 7-B type head cover, 8-hose, 9-quick connector, 10-sealing rubber strip, 11-baffle plate, 14-nipple, 15-hexagonal nut, 16-screw thread, 24-gun rod, 25-gun head, 26-heat exchange single tube, 27-rubber plug, 28-main pipe and 29-branch.
Detailed Description
The present utility model will be described in detail with reference to examples and drawings. The scope of the utility model is not limited to the examples, and any modifications within the scope of the claims are within the scope of the utility model.
Example 1
The vacuum pumping leakage test system of the heat exchanger is shown in fig. 1, and is a heat exchange single tube leakage test of the heat exchanger, and comprises a vacuum pump 1, a vacuum meter 2, a needle valve 5 and a leakage test gun, wherein the leakage test gun comprises a gun head 25 and a gun rod 24. When leakage is tested, the gun head is inserted into one end of the heat exchange single tube 26, and the other end of the heat exchange single tube is blocked by the conical rubber plug 27, so that a single tube sealing state is formed. The gun rod is connected with the vacuum pump 1 through a hose 8, and the vacuum gauge 2 and the needle valve 5 are arranged on the hose. The contact surfaces of the gun head of the leak testing gun, the conical rubber plug and the heat exchange single tube are smooth, which is beneficial to sealing leak testing. The vacuum pumping and leak testing process of the heat exchange single tube comprises the following steps:
starting a vacuum pump 1 to pump out air in a heat exchange single tube, and keeping the vacuum degree at 55kpa; the needle valve 5 is then closed while the vacuum pump is stopped.
Keeping constant temperature and constant pressure for 5min under normal pressure, observing the digital change of the vacuum gauge, and if the vacuum degree is unchanged or the change is less than 0.001kpa, judging that the vacuum degree is qualified; if the vacuum degree rises above 0.001kpa, the heat exchange single tube is failed, which indicates that the heat exchange single tube has leakage.
Example 2
For the simultaneous leak test of 15 heat transfer single tubes of shell and tube heat exchanger, leak test system includes house steward 28 and 15 branch road 29, and the vacuum pump passes through house steward and branch road connection, and the branch road is connected with the leak test rifle, is equipped with vacuum gauge 2 and needle valve 5 on every branch road. The leak test process comprises the following steps: the method comprises the steps of connecting each heat exchange single tube 26 as shown in fig. 2, starting a vacuum pump 1 to pump air in each heat exchange single tube until the vacuum degree is kept at 55kpa, closing a needle valve 5, and simultaneously stopping the pumping of the vacuum pump. Keeping constant temperature and constant pressure for 5min under normal pressure, observing the digital change of the vacuum meter of each branch, and if the vacuum degree is unchanged or the change is less than 0.001kpa, judging that the vacuum degree is qualified; if the vacuum degree rises above 0.001kpa, the heat exchange single tube is failed, which indicates that the heat exchange single tube has leakage.
Example 3
The vacuum pumping leakage test system of the heat exchanger is shown in fig. 3, and is used for integrally pumping vacuum for the heat exchanger, and comprises a vacuum pump 1, a vacuum meter 2, a needle valve 5, an A-type head cover, a B-type head cover and a leakage tested heat exchanger. The A-type head cover 6 and the B-type head cover 7 are of a seal head type structure of the shell-and-tube heat exchanger and are formed by pressing delta=2mm-304 steel plates. The diameters of the A-type head cover and the B-type head cover are 600mm, the A-type head cover is provided with a vent hole, and the vent hole is provided with a quick connector 9. As shown in fig. 5, one end of the quick connector is provided with a nipple 14, the other end is provided with a thread 16, and the middle is provided with a hexagonal nut 15 structure. The quick connector is fixed on the A-shaped head cover through a hexagonal nut by using a spanner, the nipple is connected with a hose, the nipple is connected with the vacuum pump 1 through a hose 8, and the vacuum gauge 2 and the needle valve 5 are arranged on the hose. As shown in fig. 4, the heat exchanger is a shell-and-tube heat exchanger, and comprises a shell, a tube bundle 4, a tube plate 3, a seal head and a baffle plate 11. And in the leak testing process, the sealing heads at the two ends of the heat exchanger are dismounted, the A-type head cover 6 and the B-type head cover 7 are matched and mounted on the tube plates 3 at the two ends of the heat exchanger, the end faces of the A-type head cover and the B-type head cover are of structures matched with the tube plates of the heat exchanger, and a sealing rubber strip 10 is used for sealing to form a closed system. The vacuum pumping leakage test system of the heat exchanger is utilized for carrying out leakage test in the following process:
the method comprises the steps of arranging a type A head cover 6 and a type B head cover 7 at sealing surfaces of tube plates 3 on two sides of a tube bundle 4, ensuring tight combination of head cover openings and tube plate sealing surfaces, and attaching a sealing rubber strip 10 at the sealing positions.
Secondly, starting a vacuum pump 1 to pump out air of the tube bundle, and keeping the vacuum degree at 55kpa; the needle valve 5 is then closed while the vacuum pump is stopped.
Keeping constant temperature and constant pressure for 5min under normal pressure, observing the digital change of the vacuum meter 2, and if the vacuum degree is unchanged or the change is less than 0.001kpa, judging that the vacuum degree is qualified; if the vacuum degree rises above 0.001kpa, the heat exchange tube is failed, which indicates that the heat exchange tube has leakage.
The utility model utilizes the physical principle that the volume of the closed container is unchanged at constant temperature, and after the volume of the medium in the inner space is increased or decreased, the pressure difference value generated by the physical principle is displayed on the vacuum meter digital display panel in a digital mode, and whether the tube bundle is damaged or leaked is identified by reading the pressure value.
Example 4
The vacuum pumping and leakage testing system of the heat exchanger is provided with a controller and a display device, the vacuum gauge is a wireless intelligent digital pressure transmitter (wireless intelligent pressure transmitter NB-IOT of ELVEN company), and the needle valve is a ZZYVP-10 needle regulating valve. The controller is in communication with the vacuum pump, the wireless intelligent digital pressure transmitter, the needle type regulating valve and the display device. Other equipment and connections of the heat exchanger are the same as in example 3. The controller is a PLC, and the display device is a mobile phone. The wireless intelligent digital pressure transmitter is arranged in the electric box, so that the equipment is convenient to use and maintain.
The vacuum pumping leakage test system of the heat exchanger adopts the wireless intelligent digital pressure transmitter and the digital gateway to transmit leakage test data to the mobile phone, thereby being convenient for data storage and inquiry. The leak test process by the utility model comprises the following steps:
the method comprises the steps of arranging a type A head cover 6 and a type B head cover 7 at sealing surfaces of tube plates 3 on two sides of a tube bundle 4, ensuring tight combination of head cover openings and tube plate sealing surfaces, and attaching a sealing rubber strip 10 at the sealing positions.
And communication among the vacuum pump, the intelligent digital pressure transmitter, the needle type regulating valve, the mobile phone and the controller is established.
Third, the controller starts the vacuum pump 1 to pump out the tube bundle air, keeps the vacuum level at 55kpa, then closes the needle type regulating valve 5, and stops the vacuum pump to pump out.
And (3) keeping constant temperature and constant pressure for 5min under normal pressure, observing digital change through a mobile phone screen, and if the vacuum degree is unchanged or the change is less than 0.001kpa, judging that the vacuum degree is qualified. If the vacuum degree rises above 0.001kpa, the heat exchange tube is failed, which indicates that the heat exchange tube has leakage.
Claims (6)
1. A heat exchanger vacuum pumping leak test system is characterized in that: the system comprises a vacuum pump (1), a vacuum gauge (2), a needle valve (5) and a tested leakage heat exchanger, wherein the heat exchanger is a shell-and-tube heat exchanger or a tube-and-tube heat exchanger; the shell-and-tube heat exchanger comprises a shell, a tube bundle, a tube plate, an end enclosure and a baffle plate, wherein the tube bundle consists of heat exchange single tubes (26); the leakage test comprises an integral leakage test of the heat exchanger and a single heat exchange tube leakage test; the heat exchanger is characterized in that an A-type head cover and a B-type head cover are used for integral leak testing, the A-type head cover is provided with a vent hole, a quick connector (9) is arranged on the vent hole, the vacuum pump is connected to the quick connector on the A-type head cover through a hose (8), and the vacuum gauge and the needle valve are arranged on the hose; the A-type head cover and the B-type head cover are arranged on tube plates (3) at two ends of the heat exchanger in a matched mode, and a sealing adhesive tape (10) is used for sealing to form a closed system; the heat exchange single tube leakage test gun is used, the leakage test gun comprises a gun head (25) and a gun rod (24), the gun head is inserted into one end of the heat exchange single tube, the gun rod is connected with a vacuum pump through a hose, a vacuum gauge and a needle valve are arranged on the hose, and the other end of the heat exchange single tube is blocked by a cone-shaped rubber plug (27).
2. The heat exchanger vacuum leak testing system of claim 1, wherein: the system comprises a main pipe (28) and 2-20 branches (29), wherein the vacuum pump is connected with the branches through the main pipe, the branches are connected with a leakage testing gun, and each branch is provided with a vacuum gauge (2) and a needle valve (5).
3. The heat exchanger vacuum leak testing system of claim 1, wherein: the A-type head cover (6) and the B-type head cover (7) are of a seal head type structure of the shell-and-tube heat exchanger and are formed by pressing delta=2mm-304 steel plates; the diameters of the A-type head cover (6) and the B-type head cover (7) are 300-3000 mm.
4. The heat exchanger vacuum leak testing system of claim 1, wherein: one end of the quick connector (9) is provided with a nipple (14), the other end is provided with a thread (16), and the middle is of a hexagonal nut structure.
5. The heat exchanger vacuum leak testing system of claim 1, wherein: the vacuum gauge is a wireless intelligent digital pressure transmitter, and the needle valve is a needle type regulating valve; the system is provided with a controller and a display device; the controller is in communication with the vacuum pump, the wireless intelligent digital pressure transmitter, the needle type regulating valve and the display device.
6. The evacuation leak testing system for a heat exchanger of claim 5, wherein: the controller is a PLC or a DCS, and the display equipment is a mobile phone or a computer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322404079.1U CN220729591U (en) | 2023-09-05 | 2023-09-05 | Vacuumizing leakage test system for heat exchanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322404079.1U CN220729591U (en) | 2023-09-05 | 2023-09-05 | Vacuumizing leakage test system for heat exchanger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220729591U true CN220729591U (en) | 2024-04-05 |
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ID=90497328
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322404079.1U Active CN220729591U (en) | 2023-09-05 | 2023-09-05 | Vacuumizing leakage test system for heat exchanger |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220729591U (en) |
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2023
- 2023-09-05 CN CN202322404079.1U patent/CN220729591U/en active Active
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20240427 Address after: 050000 Unit 301, Building 8, Zhufeng International Garden, High tech Zone, Shijiazhuang City, Hebei Province Patentee after: Zhang Qikui Country or region after: China Address before: 157100 01, 1st Floor, 9th Committee, Douyin East District, Hailin City, Mudanjiang City, Heilongjiang Province (east side of Jinye Hotel) Patentee before: Hailin Shunwei Anti corrosion Engineering Co.,Ltd. Country or region before: China |