CN107340104B - High-pressure leakage detection equipment for fin type heat exchanger - Google Patents
High-pressure leakage detection equipment for fin type heat exchanger Download PDFInfo
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- CN107340104B CN107340104B CN201710506325.0A CN201710506325A CN107340104B CN 107340104 B CN107340104 B CN 107340104B CN 201710506325 A CN201710506325 A CN 201710506325A CN 107340104 B CN107340104 B CN 107340104B
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- pressure
- heat exchanger
- electromagnetic valve
- electric contact
- air
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- 238000001514 detection method Methods 0.000 title claims abstract description 31
- 238000012360 testing method Methods 0.000 claims abstract description 38
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 31
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 13
- 238000000034 method Methods 0.000 claims description 12
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 8
- 230000003584 silencer Effects 0.000 claims description 8
- 238000011084 recovery Methods 0.000 claims description 6
- 230000002159 abnormal effect Effects 0.000 claims description 4
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 4
- 239000001569 carbon dioxide Substances 0.000 claims description 4
- 238000002474 experimental method Methods 0.000 claims description 2
- 238000012797 qualification Methods 0.000 claims description 2
- 239000007789 gas Substances 0.000 description 23
- 239000002699 waste material Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
- G01M3/32—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for containers, e.g. radiators
- G01M3/3236—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for containers, e.g. radiators by monitoring the interior space of the containers
- G01M3/3272—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for containers, e.g. radiators by monitoring the interior space of the containers for verifying the internal pressure of closed containers
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
The invention relates to the technical field of heat exchange equipment, and provides high-pressure leakage detection equipment of a fin type heat exchanger.A multi-pass piece is provided with an air inlet, an air outlet, a pressure measuring port and at least one test port, a supercharger is connected with an air supply main pipeline, an air outlet of the supercharger is connected with a high-pressure air storage tank through a one-way valve, the high-pressure air storage tank is connected with the air inlet pipeline of the multi-pass piece, and a first electric contact pressure gauge, a pressure reducer and a first electromagnetic valve are sequentially arranged on the connecting pipeline; the test port of the multi-way piece is connected with the heat exchanger through a high-pressure rubber pipe and a pressure test connector, and the heat exchanger is arranged in the water tank; the pressure measuring port of the multi-way part is provided with a second electric contact pressure gauge, the exhaust port of the multi-way part is connected with the main air supply pipeline, the connecting pipeline is provided with a second electromagnetic valve, and the electric control unit is respectively and electrically connected with the supercharger, the first electric contact pressure gauge, the second electric contact pressure gauge, the first electromagnetic valve and the second electromagnetic valve. The invention can realize accurate leak detection of the heat exchanger and has the advantages of simple operation, high safety coefficient and the like.
Description
Technical Field
The invention relates to the technical field of heat exchange equipment, in particular to heat exchanger leakage detection equipment.
Background
The quality of the sealing heat exchanger is a key index, and the heat exchanger needs to be subjected to leak detection test when leaving the factory so as to ensure good sealing performance. The current common leak detection mode is water detection, namely, compressed air or nitrogen is filled in a heat exchanger and then put into water to check whether leakage exists. The high-pressure air with different pressures is needed to complete the leak detection test, and particularly, the high-pressure air and the matched connector and pressure testing gun are needed to perform the leak detection test for the heat exchanger with larger working pressure (such as the working pressure of the carbon dioxide heat exchanger is 8 MPA), so that the existing leak detection equipment cannot meet the high-pressure test requirement. Meanwhile, in the existing water detection, human eyes are usually required to observe to judge whether leakage exists, and detection accuracy is difficult to guarantee; the detected high-pressure gas lacks a recovery link and has the problem of gas waste.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides high-pressure leakage detection equipment which can meet the leakage detection of heat exchangers with different working pressures, in particular to a high-pressure heat exchanger, and has the advantages of high detection precision, high safety coefficient, gas waste avoidance and the like.
In order to achieve the above purpose, the invention adopts the following technical scheme: the high-pressure leakage detecting equipment for the fin type heat exchanger comprises a supercharger, a high-pressure air storage tank, a pressure reducer, a multi-pass piece, a water tank and an electric control unit, wherein an air inlet, an air outlet, a pressure measuring port and at least one test port are formed in the multi-pass piece; the test port of the multi-way piece is connected with the heat exchanger through a high-pressure rubber tube and a pressure test connector, and the heat exchanger is placed in the water tank; the pressure measuring port of the multi-way part is provided with a second electric contact pressure gauge, the exhaust port of the multi-way part is connected with the main air supply pipeline through a pipeline, the connecting pipeline is provided with a second electromagnetic valve, and the electric control unit is respectively and electrically connected with the supercharger, the first electric contact pressure gauge, the second electric contact pressure gauge, the first electromagnetic valve and the second electromagnetic valve.
The exhaust port of the multi-way piece is provided with a third electromagnetic valve, one port of the third electromagnetic valve is connected with the exhaust port of the multi-way piece, the other port of the third electromagnetic valve is connected with the exhaust silencer, and the third electromagnetic valve is electrically connected with the electric control unit.
And a manual gate valve is arranged on the high-pressure rubber tube between the multi-pass piece testing port and the heat exchanger.
The multi-pass piece is a seven-pass piece, and the seven-pass piece is provided with an air inlet, an air outlet, a pressure measuring port and four testing ports.
The upper opening of the water tank is covered with a safety net.
The water tank is fixed on a water tank frame, an instrument desk and an electric box are welded on the water tank frame, the electric control unit is positioned in the electric box, the first electric contact pressure gauge, the second electric contact pressure gauge and the pressure reducer are arranged on the instrument desk, and an indicator lamp is arranged on the instrument desk.
The electric appliance box is externally provided with a movable control platform, and the movable control platform is electrically connected with the electric control unit.
The beneficial effects of the invention are as follows:
(1) The booster is adopted to boost the gas of the gas supply main pipe and store the gas into the high-pressure gas storage tank, and the pressure of the gas is reduced to the required pressure through the pressure reducer according to the leakage detection requirements of different heat exchangers, so that the equipment can meet the leakage detection requirements of different heat exchangers;
(2) The gas recovery pipeline is arranged in the leak detection equipment, and the gas after leak detection test can return to the workshop centralized gas supply main pipe through the pipeline, so that the gas waste phenomenon is solved;
(3) The multiple heat exchangers are tested simultaneously by adopting the multiple-pass piece, and the pipeline between each heat exchanger and the air supply port is provided with the manual gate valve, so that each test channel can be flexibly started or stopped according to the requirements;
(4) The electric control elements are arranged at the corresponding positions of all pipelines in the equipment, the whole leakage detection flow can be automatically controlled through the electric control unit, the equipment judges whether leakage exists or not according to the pressure difference, and the indicator lamp and the alarm are used for prompting whether the detected heat exchanger has leakage or not automatically, so that the detection accuracy and convenience are greatly improved;
(5) The device has high safety coefficient, is connected with the heat exchanger to be tested through the high-pressure rubber tube, and covers the safety net on the test water tank, so that the danger caused by collapse of the pressure test (quick) joint is avoided.
Drawings
FIG. 1 is a schematic diagram of the connection of the components of the present invention;
FIG. 2 is a perspective view of the first embodiment of the present invention;
FIG. 3 is a second perspective view of the present invention;
in the figure: 1-booster, 2-check valve, 3-high pressure gas storage tank, 4-first electric junction pressure gauge, 5-pressure reducer, 6-first solenoid valve, 7-seven-way piece, 8-second electric junction pressure gauge, 9-third solenoid valve, 10-exhaust silencer, 11-second solenoid valve, 12-manual gate valve, 13-high-pressure rubber tube, 14-pressure test joint, 15-heat exchanger, 16-basin, 17-red light, 18-yellow light, 19-green light, 20-inflation button, 21-reset button, 22-stop button, 23-emergency stop button, A1-basin frame, A2-instrument desk, A3-mobile control desk, A4-electrical box, A5-pilot lamp combination, A6-safety net, A7-action sign.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
Example 1:
the high-pressure leakage detection equipment of the fin type heat exchanger as shown in figures 1, 2 and 3 comprises a supercharger 1, a high-pressure air storage tank 3, a pressure reducer 5, a seven-way piece 7, a water tank 16 and an electric control unit, wherein the seven-way piece 7 is provided with an air inlet, an air outlet, a pressure measuring port and four test ports, the supercharger 1 is connected with a main air supply pipeline through a pipeline, an air outlet of the supercharger 1 is connected with the high-pressure air storage tank 3 through a pipeline through a one-way valve 2, the high-pressure air storage tank 3 is connected with the air inlet of the seven-way piece 7 through a pipeline, and a first electric contact pressure gauge 4, the pressure reducer 5 and a first electromagnetic valve 6 are sequentially arranged on the connecting pipeline; the test port of the seven-way piece 7 is connected with one port of a heat exchanger 15 through a high-pressure rubber tube 13 and a pressure test joint 14, the other port of the heat exchanger is closed, and the heat exchanger 15 is placed in a water tank 16; the pressure measuring port of the seven-way piece 7 is provided with a second electric contact pressure gauge 8, the exhaust port of the seven-way piece is connected with the main air supply pipeline through a pipeline, the connecting pipeline is provided with a second electromagnetic valve 11, the exhaust port of the seven-way piece 7 is also provided with a third electromagnetic valve 9, one port of the third electromagnetic valve 9 is connected with the exhaust port of the seven-way piece, and the other port is connected with an exhaust silencer 10. The electric control unit is electrically connected with the supercharger 1, the first electric contact pressure gauge 4, the second electric contact pressure gauge 8, the first electromagnetic valve 4, the second electromagnetic valve 11 and the third electromagnetic valve 9 respectively. A manual gate valve 12 is respectively arranged on the high-pressure rubber pipe between the four test ports of the seven-way piece 7 and the four heat exchangers to be tested.
The water tank 16 is fixed on the water tank frame A1, and the upper opening of the water tank 16 is covered with a safety net A16. The water tank frame A1 is welded with an instrument desk A2 and an electric box A4, the electric control unit adopts a PLC controller, the PLC controller is arranged in the electric box A4, the first electric contact pressure gauge 4, the second electric contact pressure gauge 8 and the pressure reducer 5 are arranged on the instrument desk, the instrument desk is provided with an indicator lamp combination A5, and the indicator lamp combination comprises a red lamp 17, a yellow lamp 18 and a green lamp 19. The outside of the electric appliance box is provided with a mobile control platform A3, the mobile control platform is electrically connected with the electric control unit, and the mobile control platform A3 is provided with an inflation button 20, a reset button 21, a stop button 22 and an emergency stop button 23.
The concrete working process for carrying out leak detection on the carbon dioxide heat exchanger with the working pressure of 8Mpa by adopting the invention is as follows:
(1) The booster 1 sucks low-pressure air (0.8 Mpa) from the air supply pipeline, and through three-stage boosting, 12Mpa of air is stored in the high-pressure air storage tank 3 through the one-way valve 2;
(2) Changing the 12Mpa gas into 8Mpa gas by a pressure reducer 5;
(3) Inserting a pressure test (quick) joint into an inlet pipe and an outlet pipe of the heat exchanger, (the first electromagnetic valve 6, the second electromagnetic valve 11 and the third electromagnetic valve 9 are in a normally closed state, the manual gate valve 12 is in a normally open state, and if the manual gate valve is not used, the manual gate valve is closed), and putting the heat exchanger into a water tank 16 for pressure test;
(4) Pressing an inflation button 20 on the mobile console, automatically opening the first electromagnetic valve 6, inflating the heat exchanger, automatically closing the first electromagnetic valve 6 when the upper limit point of the second electric contact pressure gauge 8 reaches 8MPa, stopping inflating, and flashing a green light in the inflation process;
(5) The heat exchanger is connected with a high-pressure rubber tube 13 to carry out pressure experiments in a water tank, the air filled with 8MPa is required to be placed in water, the pressure is maintained for 5 minutes, leakage cannot occur, and a green light 19 is normally on when the pressure is maintained at 8MPa;
(6) Product qualification condition: the PLC controller counts the time for 5 minutes, the second electric contact pressure 8 gauge does not drop pressure, and the product is not leaked; after the timing time is over, the second electromagnetic valve 11 is automatically opened, and high-pressure gas in the heat exchanger is sent into a workshop centralized gas supply main pipeline (low-pressure pipeline) to realize gas recovery. When the pressure of the second electric contact pressure 11 gauge is reduced to the pressure of the low-pressure main pipeline (0.8 MPa), the second electromagnetic valve 11 is automatically closed, the third electromagnetic valve 9 is automatically opened, and the residual air in the product is discharged through the exhaust silencer 10;
(7) Product reject conditions: if the second electric contact pressure meter 8 shows that the pressure maintaining of 8MPa is abnormal (the second electric contact pressure meter 8 drops to 7MPa within 1 minute), the air leakage phenomenon is indicated, and the red light 17 flashes and alarms to prompt the operator that the pressure test is abnormal. The operator can press the stop button 22, and at this time, the second electromagnetic valve 11 is automatically opened to send the high-pressure gas in the heat exchanger into the main gas supply pipeline of the workshop, so as to realize gas recovery. When the second electric contact pressure gauge 8 is reduced to the low-pressure pipeline pressure (0.8 MPa), the second electromagnetic valve 11 is automatically closed, the third electromagnetic valve 9 is automatically opened, residual air in the product is discharged through the exhaust silencer 10, and then the air leakage product is taken out;
(8) And after the pressure test is finished, the heat exchanger is taken out of the water tank, and the pressure test (quick) connector is detached. The whole process is completed;
(9) When the first electric contact pressure gauge 4 (the pressure of the high-pressure air storage tank) is lower than 9MPa in the operation process, the indicator lamp flashes to indicate that the pressure is insufficient, and the supercharger 1 is started to charge air into the high-pressure air storage tank 3; when the first electric contact pressure gauge 4 (high-pressure gas storage tank pressure) reaches 12MPa, the indicator lights green light, and prompts that the high-pressure gas storage tank 3 is full, and the supercharger 1 stops.
By adopting the invention to leak the carbon dioxide heat exchanger with the working pressure of 8Mpa, the technical parameters of key parts of the equipment are as follows:
supercharger: three-stage supercharging is adopted and is set at 12Mpa;
a pressure reducer: a high-pressure double gauge head (Jieshare in America) is adopted, and the pressure is reduced from 12MPa to 8MPa;
customizing a high-voltage electromagnetic valve, wherein the withstand voltage is 12MPa, and the voltage is 24V;
seven-way piece: the pressure resistance is more than 12MPa, and the size is manufactured according to actual conditions;
an electrical contact pressure gauge: the measuring range of the pressure gauge is 16Mpa;
manual gate valve: withstand voltage 12MPa, its drift diameter is chosen according to the actual situation;
high-pressure rubber tube: withstand voltage 12Mpa, length is made according to actual conditions;
pressure test (quick) joint: withstand voltage is above 8 MPa.
The leak detection equipment can realize accurate leak detection of heat exchanger products, and has the advantages of simple operation, high safety coefficient and the like.
Claims (4)
1. The leak detection method of the high-pressure leak detection equipment of the fin type heat exchanger is characterized by comprising the following steps of: the device comprises a supercharger, a high-pressure air storage tank, a pressure reducer, a multi-way piece, a water tank and an electric control unit, wherein an air inlet, an air outlet, a pressure measuring port and at least one test port are formed in the multi-way piece; the test port of the multi-pass piece is connected with the heat exchanger through a high-pressure rubber pipe and a pressure test connector, a manual gate valve is arranged on the high-pressure rubber pipe between the test port of the multi-pass piece and the heat exchanger, and the heat exchanger is placed in the water tank; the pressure measuring port of the multi-pass piece is provided with a second electric contact pressure gauge, the exhaust port of the multi-pass piece is connected with the air supply main pipeline through a pipeline, the connecting pipeline of the multi-pass piece and the air supply main pipeline is provided with a second electromagnetic valve, the exhaust port of the multi-pass piece is also provided with a third electromagnetic valve, one port of the third electromagnetic valve is connected with the exhaust port of the multi-pass piece, and the other port of the third electromagnetic valve is connected with the exhaust silencer; the electric control unit is respectively and electrically connected with the supercharger, the first electric contact pressure gauge, the second electric contact pressure gauge, the first electromagnetic valve, the second electromagnetic valve and the third electromagnetic valve; a safety net is covered at the upper opening of the water tank;
the specific working method for the high-pressure leakage detection equipment of the fin type heat exchanger to detect leakage of the carbon dioxide heat exchanger with the working pressure of 8Mpa comprises the following steps:
(1) The booster sucks low-pressure air from the air supply pipeline, and the 12MPa gas is stored in the high-pressure air storage tank through the check valve by three-stage boosting;
(2) Changing the 12Mpa gas into 8Mpa gas by a pressure reducer;
(3) Inserting a pressure test connector onto an inlet pipe and an outlet pipe of the heat exchanger, wherein the first electromagnetic valve, the second electromagnetic valve and the third electromagnetic valve are in a normally closed state, the manual gate valve is in a normally open state, and the heat exchanger is placed into a water tank for pressure test;
(4) Pressing an inflation button on the mobile console, automatically opening a first electromagnetic valve, inflating the heat exchanger, automatically closing the first electromagnetic valve when the upper limit point of the second electric contact pressure gauge reaches 8MPa, and stopping inflating, wherein a green light flashes in the inflating process;
(5) The heat exchanger is connected with a high-pressure rubber pipe to perform a pressure experiment in a water tank, 8MPa gas is required to be filled into the water, the pressure is maintained for 5 minutes, leakage cannot occur, and a green light is normally on when the pressure is maintained at 8MPa;
(6) Product qualification condition: the PLC counts time for 5 minutes, the second electric contact pressure gauge does not drop pressure, and the product is not leaked; after the timing time is over, the second electromagnetic valve is automatically opened, and high-pressure gas in the heat exchanger is sent into a workshop centralized gas supply main pipeline, so that gas recovery is realized; when the pressure gauge of the second electric contact is reduced to 0.8MPa of the pressure of the low-pressure main pipeline, the second electromagnetic valve is automatically closed, and meanwhile, the third electromagnetic valve is automatically opened, and residual air in the product is discharged through the exhaust silencer;
(7) Product reject conditions: when the second electric contact pressure gauge displays that the pressure maintaining of 8MPa is abnormal, the phenomenon of air leakage is indicated, and at the moment, a red light flashes and alarms to prompt an operator that the pressure test is abnormal; an operator can press a stop button, and at the moment, the second electromagnetic valve is automatically opened to send high-pressure gas in the heat exchanger into a main centralized gas supply pipeline of a workshop, so that gas recovery is realized; when the pressure gauge of the second electric contact is reduced to the pressure of 0.8MPa of the low-pressure main pipeline, the second electromagnetic valve is automatically closed, the third electromagnetic valve is automatically opened, residual air in the product is discharged through the exhaust silencer, and then the air leakage product is taken out;
(8) After the pressure test is finished, the heat exchanger is taken out of the water tank, and the pressure test connector is dismounted;
(9) When the first electric contact pressure gauge is lower than 9MPa in the operation process, the yellow lamp of the indicator lamp flashes to indicate that the pressure is insufficient, and the supercharger is started to charge air into the high-pressure air storage tank; when the first electric contact pressure gauge reaches 12MPa, the indicator light is turned on in a green light mode to prompt that the high-pressure air storage tank is full, and the supercharger stops.
2. The method for detecting leakage of the high-pressure leakage detecting device of the fin type heat exchanger according to claim 1, wherein the method comprises the following steps: the multi-pass piece is a seven-pass piece, and the seven-pass piece is provided with an air inlet, an air outlet, a pressure measuring port and four testing ports.
3. The method for detecting leakage of the high-pressure leakage detecting device of the fin type heat exchanger according to claim 1, wherein the method comprises the following steps: the water tank is fixed on a water tank frame, an instrument desk and an electric box are welded on the water tank frame, the electric control unit is positioned in the electric box, the first electric contact pressure gauge, the second electric contact pressure gauge and the pressure reducer are arranged on the instrument desk, and an indicator lamp is arranged on the instrument desk.
4. A method of leak detection in a high pressure leak detection apparatus for a fin heat exchanger as defined in claim 3, wherein: the electric appliance box is externally provided with a mobile control console, and the mobile control console is electrically connected with the electric control unit.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710506325.0A CN107340104B (en) | 2017-06-28 | 2017-06-28 | High-pressure leakage detection equipment for fin type heat exchanger |
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| CN201710506325.0A CN107340104B (en) | 2017-06-28 | 2017-06-28 | High-pressure leakage detection equipment for fin type heat exchanger |
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| CN107340104A CN107340104A (en) | 2017-11-10 |
| CN107340104B true CN107340104B (en) | 2023-09-08 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111412693B (en) * | 2020-03-30 | 2021-04-09 | 浙江大学 | New energy battery heat pump air conditioner heat exchanger and processing equipment thereof |
| CN111929008B (en) * | 2020-08-28 | 2025-01-03 | 德州威诺冷暖设备有限公司 | A heat exchanger plate test tool |
| CN114878111B (en) * | 2022-05-05 | 2023-08-18 | 珠海格力电器股份有限公司 | Leakage detecting method and leakage detecting device for air conditioner heat exchanger |
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