One-key start-stop system for diaphragm compressor

Abstract

The utility model discloses a one-key start-stop system for a diaphragm compressor. The device comprises a water inlet regulating valve arranged on a water inlet pipeline, a water outlet regulating valve arranged on a water outlet pipeline, an oil inlet regulating valve arranged on an oil inlet pipeline, an oil outlet regulating valve arranged on an oil outlet pipeline, an air inlet regulating valve arranged on an air inlet pipeline and an air outlet regulating valve arranged on an air outlet pipeline, the water inlet adjusting valve, the water outlet adjusting valve, the oil inlet adjusting valve, the oil outlet adjusting valve, the air inlet adjusting valve and the air outlet adjusting valve are all connected with a control system, and a vibration sensor connected with the control system is arranged on the diaphragm compressor body. One-key starting and stopping of the diaphragm compressor are achieved, damage to main parts, a hydraulic system and a diaphragm of the diaphragm compressor due to starting and stopping operation errors of personnel is avoided, and therefore the operation amount of the personnel is reduced, and safety risks caused by the starting and stopping operation errors are reduced.

Description

Technical Field

[0001] The utility model belongs to a one-key start-stop system for a compressor, and in particular relates to a one-key start-stop system for a diaphragm compressor. Background Art

[0002] The diaphragm compressor is a key core equipment for gas pressurization. The working principle of its transmission part is similar to that of a piston compressor. The crankshaft rotates to drive the connecting rod to swing to form the reciprocating motion of the piston, which makes the oil pressure in the closed oil cylinder rise and fall. The oil pressure pushes the diaphragm to form a periodic pressurization, thereby achieving synchronous pressurization of the gas on the other side and having the function of conveying gas. The diaphragm compressor cylinder body consists of an arc-shaped oil cylinder and an air cylinder, which are separated by an alloy diaphragm to ensure that the compressed gas is not contaminated during the pressurization process. Therefore, it is widely used in the pressurization of clean gases such as high-purity electronic gases, medical gases, and hydrogen for new energy fuel cells in the semiconductor industry.

[0003] The conventional startup operation of the diaphragm compressor: first open the cooling water circuit, and after the water circuit is operating normally, open the oil circuit; after the oil circuit is operating normally, introduce high-purity inert gas to replace the compressor gas circuit; close the gas circuit inlet and outlet valves, and open the last return valve; press the start button to start the compressor, and after the pressure and temperature reach the set value, it is judged to be normal operation, open the gas circuit inlet valve, then open the gas circuit outlet valve, and close the last return valve to ensure that the gas circuit of the compressor and upstream and downstream systems is unobstructed. After the inert gas replaces the air and passes the test, introduce the target gas to replace the inert gas, and after the replacement is qualified, switch to normal operation.

[0004] The conventional shutdown operation of the diaphragm compressor is as follows: close the inlet and outlet valves of the target gas circuit, and open the last return valve; introduce high-purity inert gas to replace the compressor gas circuit. After the inert gas replaces the target gas and passes the test, close the inlet and outlet valves of the gas circuit, press the stop button, and then close the oil circuit and the water circuit in turn.

[0005] The compressor must be started and stopped in accordance with the above operating procedures. If it is operated incorrectly or the operating procedures are disrupted, irreversible damage will be caused to the main components of the compressor such as the hydraulic system, oil chamber, diaphragm, etc. Utility Model Content

[0006] In view of the current situation that the start and stop of existing diaphragm compressors are mainly operated manually, the operation of starting and stopping the compressor is cumbersome and prone to misoperation. The utility model proposes a one-button start and stop system for diaphragm compressors, which integrates the above-mentioned start and stop operation procedures into the PLC system through instructions to realize the automatic operation of the diaphragm compressor.

[0007] The utility model provides a one-button start-stop system for a diaphragm compressor, which comprises a water inlet regulating valve arranged on a water inlet pipeline, a water outlet regulating valve arranged on a water outlet pipeline, an oil inlet regulating valve arranged on an oil inlet pipeline, an oil outlet regulating valve arranged on an oil outlet pipeline, an air inlet regulating valve arranged on an air inlet pipeline and an air outlet regulating valve arranged on an air outlet pipeline, the water inlet regulating valve, the water outlet regulating valve, the oil inlet regulating valve, the oil outlet regulating valve, the air inlet regulating valve and the air outlet regulating valve are all connected with a control system, and a vibration sensor connected with the control system is provided on the diaphragm compressor body.

[0008] Furthermore, the air intake pipeline includes an inert gas air intake pipeline and a target gas air intake pipeline which are arranged in parallel, and the inert gas air intake pipeline and the target gas air intake pipeline are merged into a total air intake pipeline which is connected to the diaphragm compressor.

[0009] Further, the air intake regulating valve includes an inert gas air intake regulating valve arranged on the inert gas air intake pipeline and a target gas air intake regulating valve arranged on the target gas air intake pipeline.

[0010] Furthermore, an intake pressure sensor and an intake temperature sensor are provided on the total intake pipeline, and an outlet pressure sensor and an outlet temperature sensor are provided on the outlet pipeline. The intake pressure sensor, the intake temperature sensor, the outlet pressure sensor and the outlet temperature sensor are all connected to the control system. Preferably, the intake pressure sensor and the intake temperature sensor are arranged near the air inlet of the diaphragm compressor, and the outlet pressure sensor and the outlet temperature sensor are arranged near the air outlet of the diaphragm compressor.

[0011] Furthermore, a return air pipeline is connected between the main air inlet pipeline and the air outlet pipeline, a reflux regulating valve is arranged on the return air pipeline, and the reflux regulating valve is connected to the control system.

[0012] Furthermore, an inlet water pressure sensor and an inlet water temperature sensor are provided on the water inlet pipe, and an outlet water pressure sensor and an outlet water temperature sensor are provided on the water outlet pipe. The inlet water pressure sensor, the inlet water temperature sensor, the outlet water pressure sensor and the outlet water temperature sensor are all connected to the control system. The inlet water pressure sensor and the inlet water temperature sensor are arranged near the water inlet of the diaphragm compressor, and the outlet water pressure sensor and the outlet water temperature sensor are arranged near the water outlet of the diaphragm compressor.

[0013] Furthermore, an oil inlet pressure sensor and an oil inlet temperature sensor are provided on the oil inlet pipeline, and an oil outlet pressure sensor and an oil outlet temperature sensor are provided on the oil outlet pipeline. The oil inlet pressure sensor, the oil inlet temperature sensor, the oil outlet pressure sensor and the oil outlet temperature sensor are all connected to the control system. The oil inlet pressure sensor and the oil inlet temperature sensor are arranged near the oil inlet of the diaphragm compressor, and the oil outlet pressure sensor and the oil outlet temperature sensor are arranged near the oil outlet of the diaphragm compressor.

[0014] Furthermore, an oil pump for increasing pressure is also provided on the oil inlet pipeline.

[0015] Furthermore, the control system is a programmable logic control system, for example, a PLC control system. The control system is the core of the one-button start-stop system. It determines the next operation through feedback from different sensor systems, and feeds back to the diaphragm compressor after the overall situation meets the standards to achieve start-stop.

[0016] Furthermore, there are three vibration sensors, including a first vibration sensor, a second vibration sensor and a third vibration sensor, which are distributed at different positions of the diaphragm compressor, for example, respectively distributed at the first-stage intake end cylinder head, the last-stage exhaust end cylinder head and the motor end of the diaphragm compressor.

[0017] The method of using the one-button start-stop system for a diaphragm compressor of the utility model is as follows:

[0018] Before starting the diaphragm compressor, all regulating valves are in the closed state.

[0019] (1) Press the start button. After the PLC control system detects the start signal of the diaphragm compressor, it issues a command to open the water inlet regulating valve on the water inlet pipeline and the water outlet regulating valve on the water outlet pipeline. After the water line operates normally, open the oil inlet regulating valve on the oil inlet pipeline and the oil outlet regulating valve on the oil outlet pipeline. After the oil line operates normally, open the inert gas inlet regulating valve on the inert gas inlet pipeline and the outlet regulating valve on the outlet pipeline, and introduce high-purity inert gas from the inert gas inlet pipeline to replace the compressor gas line. After fully replacing the gas in the compressor, close the inert gas inlet regulating valve and the outlet regulating valve, open the reflux regulating valve, and the high-purity inert gas is discharged from the gas outlet of the diaphragm compressor and circulated to the gas inlet of the diaphragm compressor to stabilize the gas pressure. The pressure value of each pipeline is detected by the intake pressure sensor, the outlet pressure sensor, the oil inlet pressure sensor, the oil outlet pressure sensor, the water inlet pressure sensor and the water outlet pressure sensor respectively; the temperature value of each pipeline is detected by the intake temperature sensor, the outlet temperature sensor, the oil inlet temperature sensor, the oil outlet temperature sensor, the water inlet temperature sensor and the water outlet temperature sensor respectively; when the PLC control system detects that the pressure and temperature have reached the set value, the diaphragm compressor body is started, and the feedback signals of two out of three from the first to the third vibration sensors are used to determine whether the vibration is within the normal range. After it is determined to be normal operation, the reflux regulating valve is closed, and the target gas intake regulating valve and the outlet regulating valve are opened, and the diaphragm compressor enters normal operation.

[0020] (2) For the above two judgments (whether the pressure and temperature reach the set values, and whether the vibration of the diaphragm compressor is within the normal range), if they are unqualified, repeat the previous step for about 2 minutes and then judge again until they are qualified and proceed to the next step.

[0021] (3) Press the stop button. After the PLC system detects the compressor stop signal, it closes the target gas inlet regulating valve and the outlet regulating valve and opens the reflux regulating valve. It determines whether the vibration is within the normal range through the feedback signal of the vibration sensor. After it is determined to be operating normally, it shuts down the compressor body. It closes the oil inlet regulating valve on the oil inlet pipeline and the oil outlet regulating valve on the oil outlet pipeline in turn, and closes the water inlet regulating valve on the water inlet pipeline and the water outlet regulating valve on the water outlet pipeline.

[0022] Beneficial effects of the utility model:

[0023] The utility model is a one-button start-stop system for a diaphragm compressor. The temperature and pressure of the inlet and outlet are detected online by the temperature sensors and pressure sensors arranged on each pipeline. After reaching the set value, the signal is fed back to the corresponding regulating valve in time, thereby improving the automation degree of the diaphragm compressor, reducing the tediousness and possibility of error in manual operation, and improving production efficiency. By real-time monitoring of the temperature and pressure of the inlet and outlet, problems are found and handled in time to avoid losses caused by improper operation or diaphragm compressor failure; the vibration frequency of the diaphragm compressor is monitored by multiple vibration sensors. After reaching the set value, the signal is fed back to the control system to determine whether to proceed to the next operation, and whether the diaphragm compressor has abnormal vibration or failure, and early warning and timely processing are carried out to ensure the normal operation of the diaphragm compressor. The utility model is a one-button start-stop system for a diaphragm compressor. It does not require additional personnel to operate, and eliminates the start-up and shutdown accidents caused by insufficient experience or misoperation of personnel, thereby protecting the diaphragm compressor, reducing the labor intensity of operators, and reducing the safety risks of misoperation. It protects the diaphragm compressor from accidental damage, reduces the workload of routine maintenance of the compressor, and delays the service life of the compressor. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of a one-button start-stop system for a diaphragm compressor of the utility model.

[0025] Reference numerals:

[0026] L1-water inlet pipeline, W1-water inlet regulating valve, L2-water outlet pipeline, W2-water outlet regulating valve,

[0027] L3- oil inlet pipeline, O1- oil inlet regulating valve, L4- oil outlet pipeline, O2- oil outlet regulating valve,

[0028] L5-air outlet pipeline, G3-air outlet regulating valve,

[0029] 1- Control system,

[0030] V1, V2, V3 - the first to third vibration sensors,

[0031] L6- inert gas inlet pipeline, L7- target gas inlet pipeline,

[0032] 2-Diaphragm compressor,

[0033] G2- inert gas inlet regulating valve, G1- target gas inlet regulating valve,

[0034] GP1-intake pressure sensor, GT1-intake temperature sensor, GP2-exhaust pressure sensor, GT2-exhaust temperature sensor,

[0035] L8-return air pipeline, G4-return regulating valve,

[0036] WP1-water inlet pressure sensor, WT1-water inlet temperature sensor, WP2-water outlet pressure sensor, WT2-water outlet temperature sensor,

[0037] OP1-inlet oil pressure sensor, OT1-inlet oil temperature sensor, OP2-outlet oil pressure sensor, OT2-outlet oil temperature sensor,

[0038] 3-Oil pump. DETAILED DESCRIPTION

[0039] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0040] like Figure 1 As shown, the utility model provides a one-button start-stop system for a diaphragm compressor, which includes a water inlet regulating valve W1 arranged on a water inlet pipeline L1, a water outlet regulating valve W2 arranged on a water outlet pipeline L2, an oil inlet regulating valve O1 arranged on an oil inlet pipeline L3, an oil outlet regulating valve O2 arranged on an oil outlet pipeline L4, an air inlet regulating valve arranged on an air inlet pipeline, and an air outlet regulating valve G3 arranged on an air outlet pipeline L5, the water inlet regulating valve W1, the water outlet regulating valve W2, the oil inlet regulating valve O1, the oil outlet regulating valve O2, the air inlet regulating valve and the air outlet regulating valve G3 are all connected to a control system 1, and a vibration sensor connected to the control system 1 is provided on the body of the diaphragm compressor 2.

[0041] The air intake pipeline includes an inert gas air intake pipeline L6 and a target gas air intake pipeline L7 which are arranged in parallel. The inert gas air intake pipeline L6 and the target gas air intake pipeline L7 are merged into a total air intake pipeline which is connected to the diaphragm compressor 2 .

[0042] The intake regulating valve includes an inert gas intake regulating valve G2 provided on the inert gas intake pipeline L6 and a target gas intake regulating valve G1 provided on the target gas intake pipeline L7.

[0043] An intake pressure sensor GP1 and an intake temperature sensor GT1 are provided on the total intake pipeline, and an outlet pressure sensor GP2 and an outlet temperature sensor GT2 are provided on the outlet pipeline L5. The intake pressure sensor GP1, the intake temperature sensor GT1, the outlet pressure sensor GP2 and the outlet temperature sensor GT2 are all connected to the control system 1. Preferably, the intake pressure sensor GP1 and the intake temperature sensor GT1 are arranged near the air inlet of the diaphragm compressor 2, and the outlet pressure sensor GP2 and the outlet temperature sensor GT2 are arranged near the air outlet of the diaphragm compressor 2.

[0044] A return air pipeline L8 is connected between the main air inlet pipeline and the air outlet pipeline L5 , and a reflux regulating valve G4 is provided on the return air pipeline L8 , and the reflux regulating valve G4 is connected to the control system 1 .

[0045] The water inlet pipe L1 is provided with a water inlet pressure sensor WP1 and a water inlet temperature sensor WT1, and the water outlet pipe L2 is provided with a water outlet pressure sensor WP2 and a water outlet temperature sensor WT2. The water inlet pressure sensor WP1, the water inlet temperature sensor WT1, the water outlet pressure sensor WP2 and the water outlet temperature sensor WT2 are all connected to the control system 1. The water inlet pressure sensor WP1 and the water inlet temperature sensor WT1 are arranged near the water inlet of the diaphragm compressor 2, and the water outlet pressure sensor WP2 and the water outlet temperature sensor WT2 are arranged near the water outlet of the diaphragm compressor 2.

[0046] An oil inlet pressure sensor OP1 and an oil inlet temperature sensor OT1 are provided on the oil inlet pipeline L3, and an oil outlet pressure sensor OP2 and an oil outlet temperature sensor OT2 are provided on the oil outlet pipeline L4. The oil inlet pressure sensor OP1, the oil inlet temperature sensor OT1, the oil outlet pressure sensor OP2 and the oil outlet temperature sensor OT2 are all connected to the control system 1. The oil inlet pressure sensor OP1 and the oil inlet temperature sensor OT1 are arranged near the oil inlet of the diaphragm compressor 2, and the oil outlet pressure sensor OP2 and the oil outlet temperature sensor OT2 are arranged near the oil outlet of the diaphragm compressor 2.

[0047] An oil pump 3 for boosting is also provided on the oil inlet pipeline L3.

[0048] Control system 1 is a programmable logic control system, for example, a PLC control system. Control system 1 is the core of the one-button start-stop system. It determines the next operation through feedback from different sensor systems, and feeds back to the diaphragm compressor 2 after the overall situation meets the standard to achieve start-stop.

[0049] There are three vibration sensors, including a first vibration sensor V1, a second vibration sensor V2 and a third vibration sensor V3, which are distributed at different positions of the diaphragm compressor 2, for example, respectively distributed at the first-stage intake cylinder head, the last-stage exhaust cylinder head and the motor end of the diaphragm compressor. The vibration values ​​monitored by the vibration sensor are taken as two out of three. After reaching the set value, the signal is fed back to the control system to determine whether the next operation can be performed. Example 1

[0050] Before starting the diaphragm compressor, all regulating valves are in the closed state.

[0051] (1) After the start button is pressed, the PLC control system detects the start-up signal of the diaphragm compressor 2 and issues a command to open the water inlet regulating valve W1 on the water inlet pipeline L1 and the water outlet regulating valve W2 on the water outlet pipeline L2. After the water circuit operates normally, the oil inlet regulating valve O1 on the oil inlet pipeline L3 and the oil outlet regulating valve O2 on the oil outlet pipeline L4 are opened; after the oil circuit operates normally, the inert gas inlet regulating valve G2 on the inert gas inlet pipeline L6 and the outlet regulating valve G3 on the outlet pipeline L5 are opened, and high-purity inert gas is introduced from the inert gas inlet pipeline L6 to replace the compressor gas circuit; after the gas in the compressor is fully replaced, the inert gas inlet regulating valve G2 and the outlet regulating valve G3 are closed, and the reflux regulating valve G4 is opened. The high-purity inert gas is discharged from the gas outlet of the diaphragm compressor and circulated to the gas inlet of the diaphragm compressor to stabilize the gas pressure; the inert gas is discharged from the gas outlet of the diaphragm compressor ... The pressure value of each pipeline is detected by the sensor GP1, the outlet pressure sensor GP2, the oil inlet pressure sensor OP1, the oil outlet pressure sensor OP2, the water inlet pressure sensor WP1, and the water outlet pressure sensor WP2 respectively. The temperature value of each pipeline is detected by the intake temperature sensor GT1, the outlet temperature sensor GT2, the oil inlet temperature sensor OT1, the oil outlet temperature sensor OT2, the water inlet temperature sensor WT1, and the water outlet temperature sensor WT2 respectively. When the PLC control system detects that the pressure and temperature have reached the set value, the diaphragm compressor body is started, and the feedback signals of two out of three from the first to the third vibration sensors V1, V2, and V3 are used to determine whether the vibration is within the normal range. After it is determined to be normal operation, the reflux regulating valve G4 is closed, and the target gas intake regulating valve G1 and the outlet regulating valve G3 are opened, and the diaphragm compressor enters normal operation.

[0052] (2) For the above two judgments (whether the pressure and temperature reach the set values, and whether the vibration of the diaphragm compressor is within the normal range), if they are unqualified, repeat the previous step for about 2 minutes and then judge again until they are qualified and proceed to the next step.

[0053] (3) After the stop button is pressed and the PLC system detects the compressor stop signal, it closes the target gas inlet regulating valve G1 and the outlet regulating valve G3, and opens the reflux regulating valve G4; it determines whether the vibration is within the normal range by taking two out of three feedback signals from the first to third vibration sensors V1, V2, and V3. After determining that it is operating normally, it shuts down the compressor body; it sequentially closes the oil inlet regulating valve O1 on the oil inlet pipeline L3 and the oil outlet regulating valve O2 on the oil outlet pipeline L4, and closes the water inlet regulating valve W1 on the water inlet pipeline L1 and the water outlet regulating valve W2 on the water outlet pipeline L2.

[0054] The present invention has been described in detail above, but the present invention is not limited to the above specific embodiments. It is understood by those skilled in the art that other changes and modifications may be made without departing from the scope of the present invention.

Claims

1. A one-button start-stop system for a diaphragm compressor, characterized in that: It comprises a water inlet regulating valve (W1) arranged on a water inlet pipeline (L1), a water outlet regulating valve (W2) arranged on a water outlet pipeline (L2), an oil inlet regulating valve (O1) arranged on an oil inlet pipeline (L3), an oil outlet regulating valve (O2) arranged on an oil outlet pipeline (L4), an air inlet regulating valve arranged on an air inlet pipeline, and an air outlet regulating valve (G3) arranged on an air outlet pipeline (L5); the water inlet regulating valve (W1), the water outlet regulating valve (W2), the oil inlet regulating valve (O1), the oil outlet regulating valve (O2), the air inlet regulating valve, and the air outlet regulating valve (G3) are all connected to a control system (1); and a vibration sensor connected to the control system (1) is provided on the body of the diaphragm compressor (2).

2. The one-button start-stop system for a diaphragm compressor according to claim 1, characterized in that: The air intake pipeline comprises an inert gas air intake pipeline (L6) and a target gas air intake pipeline (L7) which are arranged in parallel, and the inert gas air intake pipeline (L6) and the target gas air intake pipeline (L7) are combined into a total air intake pipeline which is connected to the diaphragm compressor (2).

3. The one-button start-stop system for a diaphragm compressor according to claim 2, characterized in that: The air intake regulating valve comprises an inert gas air intake regulating valve (G2) arranged on an inert gas air intake pipeline (L6) and a target gas air intake regulating valve (G1) arranged on a target gas air intake pipeline (L7).

4. The one-button start-stop system for a diaphragm compressor according to any one of claims 1 to 3, characterized in that: An intake pressure sensor (GP1) and an intake temperature sensor (GT1) are provided on the main intake pipeline, and an outlet pressure sensor (GP2) and an outlet temperature sensor (GT2) are provided on the outlet pipeline (L5). The intake pressure sensor (GP1), the intake temperature sensor (GT1), the outlet pressure sensor (GP2) and the outlet temperature sensor (GT2) are all connected to the control system (1).

5. The one-button start-stop system for a diaphragm compressor according to claim 4, characterized in that: A return air pipeline (L8) is connected between the main air inlet pipeline and the air outlet pipeline (L5), a return air pipeline (L8) is provided with a return flow regulating valve (G4), and the return flow regulating valve (G4) is connected to the control system (1).

6. The one-button start-stop system for a diaphragm compressor according to claim 5, characterized in that: The water inlet pipeline (L1) is provided with a water inlet pressure sensor (WP1) and a water inlet temperature sensor (WT1), and the water outlet pipeline (L2) is provided with a water outlet pressure sensor (WP2) and a water outlet temperature sensor (WT2). The water inlet pressure sensor (WP1), the water inlet temperature sensor (WT1), the water outlet pressure sensor (WP2) and the water outlet temperature sensor (WT2) are all connected to the control system (1).

7. The one-button start-stop system for a diaphragm compressor according to claim 6, characterized in that: An oil inlet pressure sensor (OP1) and an oil inlet temperature sensor (OT1) are provided on the oil inlet pipeline (L3), and an oil outlet pressure sensor (OP2) and an oil outlet temperature sensor (OT2) are provided on the oil outlet pipeline (L4). The oil inlet pressure sensor (OP1), the oil inlet temperature sensor (OT1), the oil outlet pressure sensor (OP2) and the oil outlet temperature sensor (OT2) are all connected to the control system (1).

8. The one-button start-stop system for a diaphragm compressor according to any one of claims 1-3, characterized in that: An oil pump (3) for increasing pressure is also provided on the oil inlet pipeline (L3).

9. The one-button start-stop system for a diaphragm compressor according to any one of claims 1-3, characterized in that: The control system (1) is a programmable logic control system.

10. The one-button start-stop system for a diaphragm compressor according to any one of claims 1-3, characterized in that: There are three vibration sensors, including a first vibration sensor (V1), a second vibration sensor (V2), and a third vibration sensor (V3), which are distributed at different positions of the diaphragm compressor (2).

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