Air tightness detection device and pressure maintaining equipment

Abstract

The utility model discloses an air tightness detection device and pressure maintaining equipment, and relates to the technical field of pressure maintaining detection. The air tightness detection device comprises an air supply module, an air pressure control module and a PLC module, the air pressure control module comprises an air transmission pipeline, and a pneumatic two-linkage piece, a first ball valve, an electromagnetic valve, a pressure sensor, a first pressure gauge and a second ball valve which are sequentially arranged on the air transmission pipeline, and the air transmission pipeline is communicated between the air supply module and equipment to be detected. The two ends of the gas transmission channel are detachably connected with the gas supply module and the to-be-detected device respectively, and the pressure sensor is used for detecting the pressure in the gas transmission pipeline; the PLC module is electrically connected with the air supply module, the pneumatic two-linkage piece, the electromagnetic valve and the pressure sensor. According to the air tightness detection device, modular design is adopted, assembling is convenient, the air pressure control module can achieve a manual control mode and an automatic control mode, various requirements of actual detection work are met, the air pressure control module can be conveniently replaced at any time, and normal work of the air tightness detection device is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of pressure-maintaining detection, in particular to an airtightness detection device and pressure-maintaining equipment. Background Art

[0002] During the maintenance and remanufacturing process of the shield machine, the air tightness test of the inner cavity of the subsequent supporting equipment, main drive, assembly machine and other equipment is an important link to ensure the quality of maintenance. The air tightness pressure maintenance test device of the equipment currently on the market requires an external gas source, and the pressure of the gas system is controlled by manually controlling the ball valve. The gas circuit pressure is read by an external pressure gauge, and the pressure maintenance time interval is independently determined by the personnel's control of time. In addition, there are subjective errors in the test results, which causes inaccurate pressure maintenance results. In addition, multiple components need to be assembled when assembling the equipment, which is time-consuming and labor-intensive.

[0003] Therefore, it is necessary to provide a new air tightness detection device and pressure maintaining equipment to solve the above technical problems. Utility Model Content

[0004] The main purpose of the utility model is to provide an airtightness detection device and a pressure-maintaining device, aiming to solve the problems of difficult assembly and low accuracy of detection results of existing airtightness detection devices.

[0005] To achieve the above-mentioned purpose, the utility model proposes an air tightness detection device, which includes an air supply module, an air pressure control module and a PLC module. The air pressure control module includes a gas pipeline and a pneumatic two-piece, a first ball valve, a solenoid valve, a pressure sensor, a first pressure gauge and a second ball valve which are sequentially arranged on the gas pipeline. The gas pipeline is connected between the gas supply module and the equipment to be detected, and the two ends of the gas pipeline are respectively detachably connected to the gas supply module and the equipment to be detected. The pressure sensor is used to detect the pressure in the gas pipeline; the PLC module is respectively electrically connected to the gas supply module, the pneumatic two-piece, the solenoid valve and the pressure sensor.

[0006] Optionally, the air pressure control module further includes a first proximity switch and a second proximity switch electrically connected to the PLC module, and the first proximity switch is electrically corresponding to the first ball valve, and the second proximity switch is electrically corresponding to the second ball valve.

[0007] Optionally, the air pressure control module also includes an exhaust pipe and an exhaust valve, the exhaust pipe is connected to the gas supply pipe, and the connection point between the exhaust pipe and the gas supply pipe is located between the first pressure gauge and the second ball valve, and the exhaust valve is arranged on the exhaust pipe.

[0008] Optionally, the air pressure control module further includes a second pressure gauge disposed on the gas pipeline, and the second pressure gauge is located between the second ball valve and the device to be detected.

[0009] Optionally, the air tightness detection device further includes an alarm module, and the alarm module is electrically connected to the PLC module.

[0010] In addition, the utility model also provides a pressure-maintaining device, which includes a box body, an HMI screen and the air-tightness detection device as described above, wherein an installation cavity is provided in the box body, the HMI screen is arranged on the box body, and the HMI screen is electrically connected to the air pressure control module, and the HMI screen is used to display the detection results output by the air pressure control module, the air supply module and the air-tightness part are arranged in the installation cavity, and the air supply pipeline of the air-tightness detection device is exposed from the box body and connected to the equipment to be detected.

[0011] Optionally, the pressure-maintaining device further comprises a door panel, the box body is provided with an opening on one side which is connected with the installation cavity, the door panel is detachably covered on the opening, and the bottom of the box body is provided with running wheels.

[0012] In the technical solution of the utility model, the air supply module supplies air to the equipment to be tested through the air pipeline, and the air pressure control module includes two modes of manual control and automatic control. In manual control, the operator controls the on-off of the air pipeline through the first ball valve and the second ball valve, and the first pressure gauge can monitor the change of air pressure in real time; in automatic control, the first ball valve and the second ball valve are normally open, and the PLC module is electrically connected to the pneumatic two-piece, the solenoid valve and the pressure sensor to achieve real-time and precise control of each component. The operation is simple, the time is short, and the error of human operation is reduced. The utility model adopts modular design and is easy to assemble. The air pressure control module can realize both manual and automatic control modes, meeting the various needs of actual detection operations. The two ends of the air pipeline are detachably connected to the air supply module and the device to be tested, respectively, so that the air pressure control module can be replaced at any time to ensure the normal operation of the air tightness detection device. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0014] Figure 1 This is a schematic diagram of the structure of the pressure-maintaining device in the embodiment of the utility model;

[0015] Figure 2 This is a schematic diagram of the gas circuit of the air tightness detection device in the embodiment of the utility model;

[0016] Figure 3 Schematic diagram of the circuit of the airtightness detection device in the embodiment of the utility model.

[0017] Description of Figure Numbers:

[0018] 1 pressure-maintaining device, 11 box, 111 installation cavity, 112 opening, 113 walking wheel, 12 HMI screen, 13 air tightness detection device, 131 air supply module, 132 air pressure control module, 1321 gas transmission pipeline, 1322 pneumatic two-piece, 1323 first ball valve, 1324 solenoid valve, 1325 pressure sensor, 1326 first pressure gauge, 1327 second ball valve, 1328 exhaust valve, 1329 second pressure gauge, 133 PLC module.

[0019] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0020] The embodiments of the present invention are described in detail below with reference to the accompanying drawings. However, the present invention can be implemented in many different ways as defined and covered by the claims.

[0021] The utility model provides an airtightness detection device and a pressure-maintaining device, aiming to solve the problems of difficult assembly of the existing airtightness detection device and low accuracy of the detection result.

[0022] The utility model proposes an air tightness detection device 13, which includes an air supply module 131, an air pressure control module 132 and a PLC module 133. The air pressure control module 132 includes an air pipeline 1321 and a pneumatic two-piece 1322, a first ball valve 1323, an electromagnetic valve 1324, a pressure sensor 1325, a first pressure gauge 1326 and a second ball valve 1327 which are sequentially arranged on the air pipeline 1321. The air pipeline 1321 is connected between the air supply module 131 and a device to be detected, and both ends of the air pipeline 1321 are detachably connected to the air supply module 131 and the device to be detected, and the pressure sensor 1325 is used to detect the pressure in the air pipeline 1321; the PLC module 133 is electrically connected to the air supply module 131, the pneumatic two-piece 1322, the electromagnetic valve 1324 and the pressure sensor 1325 respectively. The air supply module 131 supplies air to the equipment to be tested through the air pipeline 1321. The air pressure control module 132 includes two modes: manual control and automatic control. In manual control, the operator controls the on-off of the air pipeline 1321 through the first ball valve 1323 and the second ball valve 1327, and the first pressure gauge 1326 can monitor the change of air pressure in real time; in automatic control, the first ball valve 1323 and the second ball valve 1327 are normally open, and the PLC module 133 and the pneumatic two-piece 1322, the solenoid valve 1324 and the pressure sensor are connected. The device 1325 is electrically connected to realize real-time and accurate control of each component, which is simple to operate, takes a short time, and reduces the error of human operation. The utility model adopts modular design and is easy to assemble. The air pressure control module 132 can realize both manual and automatic control modes, meeting the various needs of actual detection operations. The two ends of the gas pipeline 1321 are respectively detachably connected to the gas supply module 131 and the device to be detected, so that the air pressure control module 132 can be replaced at any time to ensure the normal operation of the air tightness detection device 13.

[0023] In actual operation, before performing air tightness test on the equipment to be tested, it is necessary to test the air tightness of the air tightness testing device 13. First, close the first ball valve 1323 and the second ball valve 1327, and observe the first pressure gauge 1326. If the reading of the first pressure gauge 1326 tends to be stable, the air tightness of the air pressure control module 132 is good, otherwise, replace the new air pressure control module 132; then open the first ball valve 1323, keep the second ball valve 1327 closed, and observe the first pressure gauge 1326. If the reading of the first pressure gauge 1326 tends to be stable, the air tightness of the air supply module 131 is good, otherwise, the air supply module 131 needs to be repaired. During manual control, the operator keeps the first ball valve 1323 closed, opens the second ball valve 1327, and observes the first pressure gauge 1326. If the reading of the first pressure gauge 1326 tends to be stable, the air tightness of the equipment to be tested is good, otherwise the equipment to be tested needs to be repaired. During automatic control, the first ball valve 1323 and the second ball valve 1327 are kept open. The operator can remotely control the opening and closing of the solenoid valve 1324 through the PLC module 133 to perform air tightness testing on the equipment to be tested, which is conducive to improving the automation of air tightness testing operations. The setting of the manual control mode ensures that normal operation will not be affected when a failure occurs in the automatic control mode.

[0024] Based on the above embodiment, the air pressure control module 132 further includes a first proximity switch and a second proximity switch electrically connected to the PLC module 133, and the first proximity switch is arranged corresponding to the first ball valve 1323, and the second proximity switch is arranged corresponding to the second ball valve 1327. The first proximity switch is used to detect the switch state of the first ball valve 1323 and feed the result back to the PLC module 133, and the second proximity switch is used to detect the switch state of the second ball valve 1327 and feed the result back to the PLC module 133, thereby realizing real-time monitoring of the switch states of the first ball valve 1323 and the second ball valve 1327.

[0025] Furthermore, the air pressure control module 132 also includes an exhaust pipe and an exhaust valve 1328. The exhaust pipe is connected to the gas pipeline 1321, and the connection between the exhaust pipe and the gas pipeline 1321 is located between the first pressure gauge 1326 and the second ball valve 1327. The exhaust valve 1328 is arranged on the exhaust pipe. After the air tightness monitoring operation is completed, the first ball valve 1323 is closed, and the second ball valve 1327 and the exhaust valve 1328 are opened to discharge the gas in the device to be tested, so as to facilitate the air tightness testing operation of the next device to be tested.

[0026] Furthermore, the air pressure control module 132 also includes a second pressure gauge 1329 disposed on the gas pipeline 1321, and the second pressure gauge 1329 is located between the second ball valve 1327 and the device to be tested. In the manual mode, the second ball valve 1327 is closed, and the air pressure change in the device to be tested can be observed through the second pressure gauge 1329, so as to judge the air tightness of the device to be tested, and the first pressure gauge 1326 and the second pressure gauge 1329 can be compared in the air tightness test operation to avoid a failure of a pressure gauge and fail to find it in time.

[0027] In one embodiment, the airtightness detection device 13 further includes an alarm module, which is electrically connected to the PLC module 133. When the first proximity switch detects that the first ball valve 1323 is not opened or the second proximity switch detects that the second ball valve 1327 is not opened, a signal is fed back to the PLC module 133, and the PLC module 133 controls the circuit corresponding to the alarm module to close, and the alarm module gives an alarm. Preferably, the alarm module is a buzzer.

[0028] The utility model also provides a pressure-maintaining device 1, which includes a box body 11, an HMI screen and the air-tightness detection device 13 as described above. An installation cavity 111 is provided in the box body 11, the HMI screen is arranged on the box body 11, and the HMI screen is electrically connected to the air pressure control module 132. The HMI screen is used to display the detection result output by the air pressure control module 132. The air-tightness detection device 13 is arranged in the installation cavity 111, and the air supply pipeline 1321 of the air-tightness detection device 13 is exposed from the box body 11 and connected to the equipment to be detected. The HMI screen is provided with input control interfaces such as start of pressure maintaining work, start of air compressor, system air intake, system exhaust, system automatic control, emergency stop, fault reset, initial pressure setting, pressure maintaining time setting, and minimum pressure setting; at the same time, it is provided with multiple output display modules such as real-time data display, air pressure time trend graph, system air tightness test result report, and system alarm interface. In actual use, the operator triggers the signal through the HMI screen, and then transmits the signal to the PLC module 133 through the circuit. The PLC sends corresponding instructions according to the received signal, which is easy to operate, and the multiple output display modules are conducive to the intuitive presentation of the test results.

[0029] like Figure 3As shown, the air supply module is an air compressor, and the air compressor and the PLC module 133 are both connected to a 220V AC power supply, wherein the air compressor is connected to the 220V AC power supply through a contactor to control the opening and closing of the air compressor, and the PLC module 133 is electrically connected to the air supply module 131, the pneumatic two-piece 1322, the solenoid valve 1324, the pressure sensor 1325, the first proximity switch and the second proximity switch, respectively, so as to play a role in overall control of the system function, and the switching power supply function is to convert 220V AC power into 24V DC power for use in the control circuit, and the air pressure control module 132 is connected to the 220V AC power supply through a transformer, and the transformer can convert 220V AC power into 24V DC power for use in the circuit of the air pressure control module 132.

[0030] In addition, the pressure-maintaining device 1 further includes a door panel and a running wheel 113. The box body 11 is provided with an opening 112 on one side which is connected to the installation cavity 111. The door panel is detachably covered at the opening 112. The running wheel 113 is arranged at the bottom of the box body 11. The operator can manually operate the airtightness detection device 13 through the opening 112. The running wheel 113 facilitates the movement of the pressure-maintaining device 1 to realize airtightness detection of different devices.

[0031] Since the pressure-maintaining device 1 includes the air-tightness detection device 13 as described above, the pressure-maintaining device 1 has all the beneficial effects of the air-tightness detection device 13 described above, which will not be described one by one here.

[0032] The above description is only a preferred embodiment of the utility model, and does not limit the patent scope of the utility model. All equivalent structural changes made by using the contents of the utility model specification and drawings under the utility model concept, or directly / indirectly used in other related technical fields are included in the patent protection scope of the utility model.

Claims

1. An airtightness detection device, characterized in that: The air tightness detection device (13) comprises an air supply module (131), an air pressure control module (132) and a PLC module (133); the air pressure control module (132) comprises an air pipeline (1321) and a pneumatic two-piece (1322), a first ball valve (1323), an electromagnetic valve (1324), a pressure sensor (1325), a first pressure gauge (1326) and a second ball valve (1327) which are sequentially arranged on the air pipeline (1321); the air supply module (132 1) is connected between the air supply module (131) and the device to be detected, and the two ends of the air pipeline (1321) are detachably connected to the air supply module (131) and the device to be detected, and the pressure sensor (1325) is used to detect the pressure in the air pipeline (1321); the PLC module (133) is electrically connected to the air supply module (131), the pneumatic two-piece (1322), the solenoid valve (1324) and the pressure sensor (1325) respectively.

2. The airtightness detection device according to claim 1, characterized in that: The air pressure control module (132) further comprises a first proximity switch and a second proximity switch electrically connected to the PLC module (133), wherein the first proximity switch is electrically corresponding to the first ball valve (1323), and the second proximity switch is electrically corresponding to the second ball valve (1327).

3. The airtightness detection device according to claim 2, characterized in that: The air pressure control module (132) further comprises an exhaust pipe and an exhaust valve (1328); the exhaust pipe is connected to the gas supply pipe (1321), and the connection point between the exhaust pipe and the gas supply pipe (1321) is located between the first pressure gauge (1326) and the second ball valve (1327); the exhaust valve (1328) is arranged on the exhaust pipe.

4. The airtightness detection device according to claim 3, characterized in that: The air pressure control module (132) further comprises a second pressure gauge (1329) arranged on the air delivery pipeline (1321), and the second pressure gauge (1329) is located between the second ball valve (1327) and the device to be detected.

5. The airtightness detection device according to any one of claims 1 to 4, characterized in that: The airtightness detection device (13) further comprises an alarm module, and the alarm module is electrically connected to the PLC module (133).

6. A pressure-maintaining device, characterized in that: The pressure-maintaining device (1) comprises a housing (11), an HMI screen and an airtightness detection device (13) as claimed in claim 5, wherein an installation cavity (111) is provided in the housing (11), the HMI screen is arranged on the housing (11), and the HMI screen is electrically connected to the air pressure control module (132), the HMI screen is used to display the detection result output by the air pressure control module (132), the air supply module (131) and the airtightness component are arranged in the installation cavity (111), and the air supply pipeline (1321) of the airtightness detection device (13) is exposed from the housing (11) and connected to the device to be detected.

7. The pressure-maintaining device according to claim 6, characterized in that: The pressure-maintaining device (1) further comprises a door panel, the box body (11) is provided with an opening (112) on one side which is in communication with the installation cavity (111), the door panel is detachably covered on the opening (112), and the bottom of the box body (11) is provided with walking wheels (113).

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