Automatic leakage recovery device

Abstract

The utility model relates to an automatic leakage recovery device which comprises a protective cabinet body, a pressure reducing valve, a multi-stage vacuum generator, an electromagnetic valve, a liquid level meter, a vacuum tank, an air filter and a silencer, the pressure reducing valve, the electromagnetic valve group and the air filter are installed on the upper portion of the protective cabinet body, and the silencer is installed on the air filter. The multi-stage vacuum generator is connected with the upper portion of the vacuum tank, and the liquid level meter is installed on the vacuum tank. The automatic leakage recovery device disclosed by the utility model can automatically detect the leakage condition in the sealed cavity in real time, can continuously adsorb and recover the leaked medium in the cavity according to a set mode, and can ensure that the equipment can still normally operate within a certain time at the same time; and the loss caused by emergency shutdown maintenance and equipment replacement of large equipment is reduced to the greatest extent.

Description

Technical Field

[0001] The utility model relates to the field of leakage recovery devices, and particularly relates to an automatic leakage recovery device. Background Art

[0002] In industries such as aerospace, ship propellers, and medical and chemical industries, leakage recovery devices are widely used to monitor and recover leaked media in key cavities in an emergency. When a sudden severe working condition occurs in the cavity and causes leakage, the leakage recovery device is started in time to recover a large amount of media, preventing various high-cost losses caused by component damage inside due to leakage, emergency shutdown for maintenance, and the equipment replacement cycle.

[0003] Traditional leakage recovery devices usually need to be manually opened, and cannot effectively monitor the leakage situation in the sealed cavity in real time. In addition, the recovery mode is single, and it can only recover quantitatively and continuously for a long time, and cannot effectively analyze and predict the leakage situation of the media in the cavity, lacking operability and controllability. The operation of traditional leakage recovery devices is greatly affected by external human factors, and cannot flexibly adopt corresponding efficient leakage recovery strategies according to the actual leakage situation of the sealed cavity. Summary of the Utility Model

[0004] In order to solve the technical problems existing in the prior art, the utility model provides an automatic leakage recovery device.

[0005] To achieve the above object, the technical solution of the utility model is as follows:

[0006] An automatic leakage recovery device, which is connected to a sealed cavity, includes a protective cabinet, a pressure reducing valve, a multi-stage vacuum generator, an electromagnetic valve group, a liquid level gauge, a vacuum tank, an air filter, and a muffler. The pressure reducing valve, the electromagnetic valve group, and the air filter are installed on the upper part of the protective cabinet, the muffler is installed on the air filter, the multi-stage vacuum generator is connected to the upper part of the vacuum tank, and the liquid level gauge is installed on the vacuum tank.

[0007] As a preferred technical solution, a sampling ball valve and a recovery joint are installed on the lower side wall of the protective cabinet. The vacuum tank is connected to the recovery joint through a pipeline, and the recovery joint is connected to the sealed cavity. The sampling ball valve is fixedly installed on the side wall of the protective cabinet and is arranged on the pipeline between the vacuum tank and the recovery joint.

[0008] As a preferred technical solution, a flow meter is provided on the protective cabinet, and the flow meter is connected to the pipeline.

[0009] As a preferred technical solution, a pressure gauge is provided on the protective cabinet, and the pressure gauge is connected to the inside of the vacuum tank.

[0010] As a preferred technical solution, a first solenoid valve is provided at the connection between the multi-stage vacuum generator and the upper part of the vacuum tank, a second solenoid valve is also provided at the upper part of the vacuum tank, and a third solenoid valve is provided at the bottom of the vacuum tank.

[0011] As a preferred technical solution, the device further includes a PLC, and the pressure reducing valve, multi-stage vacuum generator, solenoid valve group, liquid level gauge, first solenoid valve, second solenoid valve, and third solenoid valve are all connected to the PLC.

[0012] As a preferred technical solution, an audible and visual alarm is provided on the protective cabinet body, and the audible and visual alarm is connected to the PLC.

[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0014] The automatic leak recovery device of the present utility model can set multiple modes such as inspection mode, normal mode, and extreme mode, can monitor the leakage situation in the sealed cavity in real time and perform leakage recovery treatment, has operability and controllability, can automatically switch modes according to the leakage situation, and the switching between modes is all logically judged by the automatic leak recovery device itself, avoiding mistakes caused by human judgment. When a leak occurs in the sealed cavity, the device can still keep the large equipment running normally for a long time, optimize the disposal of the leakage situation in the sealed cabin to the greatest extent, effectively prevent operation accidents caused by leakage, and avoid losses caused by emergency shutdown for maintenance and equipment replacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic structural diagram of the automatic leak recovery device of the present utility model;

[0016] Figure 2 is a rear view of the automatic leak recovery device of the present utility model.

[0017] In the figure: 1. Pressure reducing valve; 2. Multi-stage vacuum generator; 3. First solenoid valve; 4. Second solenoid valve; 5. Liquid level gauge; 6. Vacuum tank; 7. Third solenoid valve; 8. Sampling ball valve; 9. Recovery joint; 10. Solenoid valve group; 11. Air filter; 12. Muffler; 13. Flowmeter; 14. Pressure gauge; 15. Junction box; 16. Protective cabinet body. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] The technical solutions of the present utility model will be further described below in conjunction with the specific embodiments:

[0019] As shown in Figure 1As shown in the figure, an automatic leak recovery device is connected to a sealed cavity, including a protective cabinet 16, a pressure reducing valve 1, a multi-stage vacuum generator 2, a solenoid valve group 10, a liquid level gauge 5, a vacuum tank 6, an air filter 11, a muffler 12, and a PLC. The pressure reducing valve 1, the solenoid valve group 10, and the air filter 11 are installed on the upper part of the protective cabinet 16. The muffler 12 is installed on the air filter 11. The multi-stage vacuum generator 2 is connected to the upper part of the vacuum tank 6. The liquid level gauge 5 is installed on the vacuum tank 6. The pressure reducing valve 1 serves to reduce the gas pressure to the working pressure of the multi-stage vacuum generator 2 when the externally provided gas pressure is too high. The solenoid valve group 10 serves to control the on-off of the pipeline. When the multi-stage vacuum generator 2 is working, the solenoid valve group 10 is closed, so that the solenoid valve group 10 and the vacuum tank 6 form a closed pipeline. Vacuum negative pressure is generated by the operation of the multi-stage vacuum generator 2, and then the solenoid valve group 10 is turned on to perform vacuum extraction on the working area. The vacuum tank 6 changes from a negative pressure area to an atmospheric pressure area, and later, the solenoid valve group 10 is repeatedly turned on and off according to the working mode to perform the above work. A first solenoid valve 3 is provided at the connection between the multi-stage vacuum generator 2 and the upper part of the vacuum tank 6. A second solenoid valve 4 is also provided on the upper part of the vacuum tank 6. A third solenoid valve 7 is provided at the bottom of the vacuum tank 6. The pressure reducing valve 1, the multi-stage vacuum generator 2, the solenoid valve group 10, the liquid level gauge 5, the first solenoid valve 3, the second solenoid valve 4, and the third solenoid valve 7 are all connected to the PLC.

[0020] A sampling ball valve 8 and a recovery joint 9 are installed on one side of the lower part of the protective cabinet 16. The vacuum tank 6 is connected to the recovery joint 9 through a pipeline. The recovery joint 9 is connected to the sealed cavity. The sampling ball valve 8 is fixedly installed on the side wall of the protective cabinet 16 and is arranged on the pipeline between the vacuum tank 6 and the recovery joint 9. A junction box 15 is provided on the other side of the lower part of the protective cabinet 16.

[0021] A flow meter 13, a pressure gauge 14, and an audible and visual alarm are also provided on the protective cabinet 16. The flow meter 13 is connected to the pipeline. The pressure gauge 14 is connected to the inside of the vacuum tank 6. The audible and visual alarm is connected to the PLC.

[0022] The automatic leak recovery device has three set modes: inspection mode, normal mode, and extreme mode. The following operating time and vacuum pressure can be set by itself.

[0023] 1) Inspection mode: In this mode, the pressure reducing valve 1 is energized and opened. After the multi-stage vacuum generator 2 works for 1 s, the solenoid valve group 10 is opened, the first solenoid valve 3 is opened, and the second solenoid valve 4 is closed. The vacuum tank 6 is evacuated until the pressure switch reaches -0.85 bar (which takes about 20 s). Then, the second solenoid valve 4 is opened, and the cavity to be leak-recovered is subjected to negative pressure suction for 1 minute. After that, the second solenoid valve 4 is closed, and the multi-stage vacuum generator 2 continues to work until the vacuum pressure switch reaches -0.85 bar. Then, the first solenoid valve 3 is closed, and the solenoid valve group 10 is closed after a 1 s delay, ending one suction cycle. This mode is used to periodically and briefly suck and discharge the sealed cavity to monitor in real time whether there is a leakage in the sealed cabin.

[0024] 2) Normal mode: In this mode, when a low liquid level signal alarm occurs in the liquid level gauge 5 in the vacuum tank 6 during the inspection mode cycle, the second solenoid valve 4 is closed. After the multi-stage vacuum generator 2 works for 1 s, the solenoid valve group 10 is opened. At this time, it should be judged whether the vacuum pressure in the vacuum tank 6 is greater than -0.85 bar. If it does not reach -0.85 bar, the second solenoid valve 4 is opened, and the sealed cabin is continuously subjected to negative pressure suction for 15 minutes. If there is a leakage in the sealed cavity, the medium flows into the vacuum tank 6 through the recovery joint 9. If the high liquid level signal of the liquid level switch 5 in the vacuum tank 6 does not alarm, the second solenoid valve 4 is closed, and the multi-stage vacuum generator 2 continues to work until the pressure in the vacuum tank 6 reaches -0.85 bar. Then, the first solenoid valve 3 is closed, and the solenoid valve 10 is de-energized and closed after a 1 s delay, and it switches to the inspection control mode. If a high liquid level signal alarm occurs in the liquid level gauge 5 of the vacuum tank 6, it automatically switches to the extreme mode. In this mode, when there is a small amount of leakage, the sealed cavity is periodically and quantitatively sucked and discharged until the leakage level is low enough to stop leaking at the low level of the liquid level gauge 5 and then switches to the inspection mode. If the leakage amount in the sealed cavity increases, it automatically switches to the extreme mode.

[0025] 3) Extreme mode: In this mode, during the 15-minute continuous negative pressure suction of the sealed cabin, if a high liquid level signal alarm occurs in the liquid level switch 5 in the vacuum tank 6, the solenoid valve group 10 is closed, and the third solenoid valve 7 is opened to drain the vacuum tank 6 until the low liquid level alarm of the liquid level switch 5 in the vacuum tank 6 is eliminated. Then, the solenoid valve group 10 and the third solenoid valve 7 are closed, and the drainage work ends. Then, the cabin is subjected to 15 minutes of suction work again. If the low liquid level does not alarm, it switches to the inspection mode control; otherwise, it switches to the normal mode control. In this mode, when there is a large amount of leakage, a long-time and large amount of suction and discharge is carried out on the sealed cavity, and at the same time, an audible and visual alarm is issued until the leakage level is low enough to switch to the normal mode or the inspection mode at the low level of the liquid level gauge 5.

[0026] The operation of the automatic leakage recovery device can be observed in real time by observing the flowmeter 13 and the pressure gauge 14; after leakage occurs in the sealing cavity, it is recovered into the vacuum tank 6, and the recovered medium can be sampled and tested through the sampling ball valve 8. In addition, the operation conditions of each of the above modes are recorded by the PLC of the automatic leakage recovery device for future reference.

[0027] This embodiment is only a further explanation of the present invention, rather than a limitation on the present invention. After reading this specification, those skilled in the art can make non-creative modifications to this embodiment as needed, but as long as it is within the scope of the claims of the present invention, it is protected by the patent law.

Claims

1. An automatic leakage recovery device, the device is connected to a sealed cavity, characterized in that, It includes a protective cabinet body, a pressure reducing valve, a multi-stage vacuum generator, a solenoid valve group, a liquid level gauge, a vacuum tank, an air filter and a muffler. The pressure reducing valve, the solenoid valve group and the air filter are installed on the upper part of the protective cabinet body. The muffler is installed on the air filter. The multi-stage vacuum generator is connected to the upper part of the vacuum tank. The liquid level gauge is installed on the vacuum tank.

2. The automatic leak recovery device according to claim 1, characterized in that, A sampling ball valve and a recovery joint are installed on the lower side wall of the protective cabinet body. The vacuum tank is connected to the recovery joint through a pipeline. The recovery joint is connected to a sealed cavity. The sampling ball valve is fixedly installed on the side wall of the protective cabinet body and is arranged on the pipeline between the vacuum tank and the recovery joint.

3. The automatic leakage recovery device according to claim 1, characterized in that, A flow meter is provided on the protective cabinet body, and the flow meter is connected to the pipeline.

4. The automatic leak recovery device according to claim 1, wherein A pressure gauge is provided on the protective cabinet body, and the pressure gauge is connected to the inside of the vacuum tank.

5. The automatic leak recovery device according to claim 1, wherein, A first solenoid valve is provided at the connection between the multi-stage vacuum generator and the upper part of the vacuum tank. A second solenoid valve is also provided on the upper part of the vacuum tank. A third solenoid valve is provided at the bottom of the vacuum tank.

6. The automatic leak recovery device according to claim 5, characterized in that, The device further includes a PLC, and the pressure reducing valve, the multi-stage vacuum generator, the solenoid valve group, the liquid level gauge, the first solenoid valve, the second solenoid valve and the third solenoid valve are all connected to the PLC.

7. The automatic leak recovery device according to claim 6, wherein An audible and visual alarm is provided on the protective cabinet body, and the audible and visual alarm is connected to the PLC.

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