CN220036901U - Oil air cavity pressure control system of diaphragm compressor - Google Patents
Oil air cavity pressure control system of diaphragm compressor Download PDFInfo
- Publication number
- CN220036901U CN220036901U CN202320729882.XU CN202320729882U CN220036901U CN 220036901 U CN220036901 U CN 220036901U CN 202320729882 U CN202320729882 U CN 202320729882U CN 220036901 U CN220036901 U CN 220036901U
- Authority
- CN
- China
- Prior art keywords
- pressure
- control system
- oil
- air cavity
- pressure transmitter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000003921 oil Substances 0.000 claims abstract description 59
- 239000012528 membrane Substances 0.000 claims abstract description 26
- 239000010725 compressor oil Substances 0.000 claims abstract description 11
- 230000000694 effects Effects 0.000 abstract description 3
- 230000002035 prolonged effect Effects 0.000 abstract description 2
- 230000001105 regulatory effect Effects 0.000 abstract 1
- 239000010724 circulating oil Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
Landscapes
- Control Of Positive-Displacement Pumps (AREA)
Abstract
The utility model provides a diaphragm compressor oil air cavity pressure control system, includes crankcase, midbody, goes up membrane head and lower membrane head, upward is equipped with the air cavity in the membrane head, is equipped with the oil pocket in the membrane head down, is equipped with the diaphragm between air cavity and the oil pocket down, be equipped with back oil line between membrane head and the midbody down, back oil line is last to be equipped with overflow valve, needle valve and the electromagnetic spill valve that parallelly connected set up, be equipped with the first pressure transmitter that is used for detecting oil pocket pressure down on the membrane head, upward be equipped with the second pressure transmitter that is used for detecting air cavity pressure on the membrane head, electromagnetic spill valve, first pressure transmitter, second pressure transmitter link to each other with PLC control system respectively, and PLC control system adjusts the aperture of electromagnetic spill valve according to the differential pressure value of first pressure transmitter, second pressure transmitter. The internal pressure of the oil cavity can be regulated in real time, the degree of automation is high, the pressure relief protection effect is good, the diaphragm can be effectively prevented from being damaged due to stress impact, and the service life of the diaphragm is prolonged.
Description
Technical field:
the utility model relates to a diaphragm compressor oil air cavity pressure control system.
The background technology is as follows:
when the diaphragm compressor works normally, the pressure difference between the air cavity of the upper diaphragm head and the oil cavity of the lower diaphragm head cannot reach a balance point at the same time, so that the oil cavity is required to be decompressed and protected by arranging an overflow valve and a needle valve, and the diaphragm is prevented from being compressed and damaged. However, the pressure relief by the overflow valve and the needle valve has a certain limitation, firstly, the pressure relief degree cannot be adjusted in real time according to the internal pressure of the oil cavity, the automation degree is low, and the pressure relief protection effect is poor; secondly, when the pressure of the oil cavity is far higher than that of the air cavity, the overflow valve and the needle valve exceed the upper pressure relief limit and cannot relieve pressure in time, and under the condition that no additional pressure relief measures exist, the diaphragm can be subjected to great stress, and the service life of the diaphragm is reduced.
In summary, the problem of controlling the pressure of the oil gas cavity of the diaphragm compressor has become a technical problem to be solved in industry.
The utility model comprises the following steps:
the utility model provides a diaphragm compressor oil air cavity pressure control system for overcoming the defects of the prior art, and solves the problems that the pressure release degree can not be adjusted in real time according to the internal pressure of an oil cavity only by means of an overflow valve and a needle valve, the automation degree is low and the pressure release protection effect is poor in the past.
The technical scheme adopted by the utility model for solving the technical problems is as follows:
the utility model provides a diaphragm compressor oil air cavity pressure control system, includes crankcase, midbody, goes up membrane head and lower membrane head, upward is equipped with the air cavity in the membrane head, is equipped with the oil pocket in the membrane head down, is equipped with the diaphragm between air cavity and the oil pocket down, be equipped with back oil line between membrane head and the midbody down, back oil line is last to be equipped with overflow valve, needle valve and the electromagnetic spill valve that parallelly connected set up, be equipped with the first pressure transmitter that is used for detecting oil pocket pressure down on the membrane head, upward be equipped with the second pressure transmitter that is used for detecting air cavity pressure on the membrane head, electromagnetic spill valve, first pressure transmitter, second pressure transmitter link to each other with PLC control system respectively, and PLC control system adjusts the aperture of electromagnetic spill valve according to the differential pressure value of first pressure transmitter, second pressure transmitter.
The first pressure transmitter is used for detecting the pressure of the oil cavity and sending a pressure signal to the PLC control system.
The second pressure transmitter is used for detecting the pressure of the air cavity and sending a pressure signal to the PLC control system.
The electromagnetic overflow valve enables the pressure difference of the first pressure transmitter and the second pressure transmitter to be stabilized within a set difference value by adjusting the opening degree.
A safe oil way is arranged between the lower membrane head and the intermediate body, a third pressure transmitter is arranged on the safe oil way, and the third pressure transmitter is connected with the PLC control system.
And a safety valve is arranged on the safety oil path.
And a return pipeline leading to the crankcase is arranged in the middle body and is respectively connected with the oil return pipeline and the safety oil way.
The utility model adopts the scheme and has the following advantages:
through setting up first pressure transmitter and second pressure transmitter, first pressure transmitter is used for detecting oil pocket pressure and sends pressure signal to PLC control system, the second pressure transmitter is used for detecting air pocket pressure and sends pressure signal to PLC control system, PLC control system makes the differential pressure of first pressure transmitter and second pressure transmitter stabilize in the differential value of settlement according to the differential pressure value adjustment electromagnetic spill valve of first pressure transmitter, second pressure transmitter, can adjust oil pocket internal pressure in real time, degree of automation is high, pressure release protection is effectual, can effectively avoid the diaphragm to damage because of receiving stress impact, the life of diaphragm has been prolonged.
Description of the drawings:
fig. 1 is a schematic structural view of the present utility model.
In the figure, 1, a crank case, 2, an intermediate body, 3, an upper membrane head, 4, a lower membrane head, 5, an air cavity, 6, an oil cavity, 7, a diaphragm, 8, an oil return pipeline, 9, an overflow valve, 10, a needle valve, 11, an electromagnetic overflow valve, 12, a first pressure transmitter, 13, a second pressure transmitter, 14, a PLC control system, 15, a safety oil circuit, 16, a third pressure transmitter, 17, a safety valve, 18 and a return pipeline.
The specific embodiment is as follows:
in order to clearly illustrate the technical features of the present solution, the present utility model will be described in detail below with reference to the following detailed description and the accompanying drawings.
As shown in fig. 1, the pressure control system for the oil air cavity of the diaphragm compressor comprises a crank case 1, an intermediate 2, an upper film head 3 and a lower film head 4, wherein an air cavity 5 is arranged in the upper film head 3, an oil cavity 6 is arranged in the lower film head 4, a diaphragm 7 is arranged between the air cavity 5 and the oil cavity 6, an oil return pipeline 8 is arranged between the lower film head 4 and the intermediate 2, an overflow valve 9, a needle valve 10 and an electromagnetic overflow valve 11 which are arranged in parallel are arranged on the oil return pipeline 8, a first pressure transmitter 12 for detecting the pressure of the oil cavity 6 is arranged on the lower film head 4, a second pressure transmitter 13 for detecting the pressure of the air cavity 5 is arranged on the upper film head 3, the electromagnetic overflow valve 11, the first pressure transmitter 12 and the second pressure transmitter 13 are respectively connected with a PLC control system 14, and the PLC control system 14 adjusts the opening of the electromagnetic overflow valve 11 according to the differential pressure values of the first pressure transmitter 12 and the second pressure transmitter 13.
The first pressure transmitter 12 is used to detect the pressure of the oil chamber 6 and transmit a pressure signal to the PLC control system 14.
The second pressure transmitter 13 is used for detecting the pressure of the air cavity 5 and sending a pressure signal to the PLC control system 14.
The electromagnetic spill valve 11 stabilizes the differential pressure between the first pressure transmitter 12 and the second pressure transmitter 13 within a set differential value by adjusting the opening degree.
A safety oil way 15 is arranged between the lower membrane head 4 and the intermediate body 2, a third pressure transmitter 16 is arranged on the safety oil way 15, and the third pressure transmitter 16 is connected with the PLC control system 14.
The safety oil path 15 is provided with a safety valve 17.
A return line 18 leading to the crankcase 1 is arranged in the intermediate body 2, and the return line 18 is respectively connected with the oil return line 8 and the safety oil line 15 and is used for circulating oil in the oil return line 8 and the safety oil line 15 back to the crankcase 1.
Working principle:
during normal operation, after the diaphragm compressor is started, the opening of the overflow valve 9 and the needle valve 10 are manually adjusted to adjust the oil cavity pressure, the needle valve 10 realizes a fine adjustment function, when the PLC control system 14 detects that the differential pressure value of the first pressure transmitter 12 and the second pressure transmitter 13 is larger than or equal to a set pressure value, the PLC control system 14 can adjust the opening of the electromagnetic overflow valve 11 according to the magnitude of the differential pressure value to enable the differential pressure of the first pressure transmitter 12 and the second pressure transmitter 13 to be stabilized within the set differential value, even if the differential pressure values of the two sides of the oil cavity 6 and the air cavity 5 are stabilized within the set differential value, so as to avoid the diaphragm 7 from being damaged due to impact;
when the PLC control system 14 detects that the pressure value of the third pressure transmitter 16 exceeds the set pressure value, the PLC control system 14 immediately signals the electromagnetic overflow valve 11 to reach a full-open state, so that the pressure of the oil cavity 6 is quickly reduced to the lowest value to protect the diaphragm 7 from being damaged again, and meanwhile, the PLC control system 14 can stop the diaphragm type compressor according to the monitored signal;
if the PLC control system 14 fails, the safety valve 17 can timely discharge the pressure of the oil cavity 6 through the safety oil path 15 after exceeding the set pressure so as to protect the diaphragm 7 from being damaged.
The above embodiments are not to be taken as limiting the scope of the utility model, and any alternatives or modifications to the embodiments of the utility model will be apparent to those skilled in the art and fall within the scope of the utility model.
The present utility model is not described in detail in the present application, and is well known to those skilled in the art.
Claims (7)
1. The utility model provides a diaphragm compressor oil air cavity pressure control system, includes crankcase, midbody, goes up membrane head and lower membrane head, is equipped with the air cavity in the upper membrane head, is equipped with the oil pocket in the lower membrane head, is equipped with diaphragm, its characterized in that between air cavity and the oil pocket: an oil return pipeline is arranged between the lower membrane head and the intermediate, an overflow valve, a needle valve and an electromagnetic overflow valve which are arranged in parallel are arranged on the oil return pipeline, a first pressure transmitter for detecting the pressure of an oil cavity is arranged on the lower membrane head, a second pressure transmitter for detecting the pressure of the air cavity is arranged on the upper membrane head, the electromagnetic overflow valve, the first pressure transmitter and the second pressure transmitter are respectively connected with a PLC control system, and the opening of the electromagnetic overflow valve is adjusted by the PLC control system according to the differential pressure values of the first pressure transmitter and the second pressure transmitter.
2. The diaphragm compressor oil air cavity pressure control system of claim 1, wherein: the first pressure transmitter is used for detecting the pressure of the oil cavity and sending a pressure signal to the PLC control system.
3. The diaphragm compressor oil air cavity pressure control system of claim 1, wherein: the second pressure transmitter is used for detecting the pressure of the air cavity and sending a pressure signal to the PLC control system.
4. The diaphragm compressor oil air cavity pressure control system of claim 1, wherein: the electromagnetic overflow valve enables the pressure difference of the first pressure transmitter and the second pressure transmitter to be stabilized within a set difference value by adjusting the opening degree.
5. The diaphragm compressor oil air cavity pressure control system of claim 1, wherein: a safe oil way is arranged between the lower membrane head and the intermediate body, a third pressure transmitter is arranged on the safe oil way, and the third pressure transmitter is connected with the PLC control system.
6. The diaphragm compressor oil air cavity pressure control system of claim 5, wherein: and a safety valve is arranged on the safety oil path.
7. The diaphragm compressor oil air cavity pressure control system of claim 5, wherein: and a return pipeline leading to the crankcase is arranged in the middle body and is respectively connected with the oil return pipeline and the safety oil way.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320729882.XU CN220036901U (en) | 2023-03-31 | 2023-03-31 | Oil air cavity pressure control system of diaphragm compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320729882.XU CN220036901U (en) | 2023-03-31 | 2023-03-31 | Oil air cavity pressure control system of diaphragm compressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220036901U true CN220036901U (en) | 2023-11-17 |
Family
ID=88740469
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320729882.XU Active CN220036901U (en) | 2023-03-31 | 2023-03-31 | Oil air cavity pressure control system of diaphragm compressor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220036901U (en) |
-
2023
- 2023-03-31 CN CN202320729882.XU patent/CN220036901U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103670802B (en) | A kind of small air pillow pressurization system | |
| CN103671336A (en) | Load-sensitive hydraulic system and power matching control method, device and system | |
| CN102705034A (en) | Oil pump electricity-liquid proportion overflow variable control method and device | |
| CN111207293A (en) | Vehicle-mounted hydrogen supply system | |
| CN220036901U (en) | Oil air cavity pressure control system of diaphragm compressor | |
| CN116428163B (en) | Oil air cavity pressure control method for diaphragm compressor | |
| CN202007768U (en) | Diaphragm breakage alarm device for diaphragm compressor | |
| CN110131240B (en) | Hydraulic position and pressure closed-loop control dynamic and static simulation test system and method | |
| EP3841635A1 (en) | Fuel cell with protection from pressure imbalance | |
| US6217288B1 (en) | Method and apparatus for limiting a critical variable of a group of compressors or an individual compressor | |
| CN109898592A (en) | A kind of excavator method for maintaining | |
| CN103477093A (en) | Electropneumatic position controller | |
| CN110616770A (en) | Anti-suction control system and control method for bucket rod oil cylinder, bucket rod oil cylinder and excavator | |
| CN107830407B (en) | Control device and control method for stabilizing pressure of pneumatic main pipe network | |
| CN114592963B (en) | Piston cooling system monitoring method and device and engine | |
| CN106677909B (en) | Electronic unloading device of gas engine | |
| CN213016738U (en) | Device capable of realizing stable pipeline pressure between two-stage reciprocating pump | |
| CN115013210A (en) | Explosion-proof diesel engine start control system | |
| CN107420356A (en) | A kind of energy-saving hydraulic pumping plant for TRT fast cut valves | |
| CN219975574U (en) | Valve control system | |
| CN201187380Y (en) | Fuel system of engine | |
| CN111734878A (en) | Electric control type pipe explosion automatic cut-off control valve | |
| CN220227347U (en) | Stroke-adjustable pressure relief functional valve group and roller press | |
| CN101614256B (en) | Method and device for judging separation initial point of automobile clutch | |
| CN220471366U (en) | Valve interlocking system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |