Anti-maloperation control loop for single-action air opening type quick-closing pneumatic valve at outlet of large air compressor

Abstract

The utility model relates to the technical field of pneumatic valve control, in particular to a large air compressor outlet single-action air opening type quick-closing pneumatic valve anti-maloperation control loop which comprises a first air source pipeline, a second air source pipeline, a first electromagnetic valve, a second electromagnetic valve, a power source assembly, a pneumatic valve and an elastic piece. The second gas source pipeline is communicated with the first gas source pipeline; the first electromagnetic valve is provided with a first interface, a second interface and a third interface; the first connector and the second connector are connected to the first gas source pipeline; the third interface is connected to the second gas source pipeline; the second electromagnetic valve is provided with a fourth interface, a fifth interface and a sixth interface; the fourth interface and the fifth interface are connected to the second gas source pipeline; the fifth interface is communicated with the third interface through the second gas source pipeline; the power supply assembly is connected to the first electromagnetic valve and the second electromagnetic valve; and the elastic piece is connected to the pneumatic valve.

Description

Technical Field

[0001] This utility model relates to the field of pneumatic valve control technology, specifically to a control circuit for preventing accidental operation of a single-acting, air-opening, quick-closing pneumatic valve at the outlet of a large air compressor. Background Technology

[0002] In modern industrial production, large air compressors are widely used in various scenarios requiring large volumes of compressed air, such as manufacturing and the energy industry. Large compressed air main systems typically consist of multiple air compressor outlet pipes connected in parallel. The number of compressors started and stopped is flexibly adjusted by real-time monitoring of air consumption to ensure efficient and stable system operation. However, the stability and reliability of the outlet pneumatic valves are crucial during air compressor operation.

[0003] Currently, the selection of compressor outlet actuators, which serve as isolation valves between the air compressor and the system, is crucial. To prevent backflow of high-pressure air from the main pipeline when an air compressor stops operating, pneumatic actuators are typically chosen because they can achieve rapid shut-off. In particular, single-acting air-to-open quick-closing pneumatic valves play a vital role in ensuring system safety.

[0004] However, the single-acting, air-to-open, quick-closing pneumatic valve at the air compressor outlet has significant drawbacks in actual operation. This type of valve needs to remain open for extended periods during air compressor operation, requiring the solenoid valve to be continuously energized. Over time, the coil becomes overheated, and due to the inherent lifespan of the equipment, the solenoid valve is prone to failure. If the solenoid valve malfunctions, it will automatically cut off the driving air supply, causing the valve to close. This can lead to direct compressor tripping, system disconnection, and pressure fluctuations throughout the compressed air network. Furthermore, it may cause severe surge in the compressor itself, directly damaging the equipment.

[0005] Therefore, how to solve the shortcomings of the existing technology, such as the potential damage to equipment due to abnormal valve closure, has become the research topic to be addressed by this utility model. Utility Model Content

[0006] The purpose of this invention is to provide a control circuit for preventing accidental operation of a single-acting, quick-closing pneumatic valve at the outlet of a large air compressor.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0008] A control circuit for preventing accidental operation of a single-acting, air-to-open, quick-closing pneumatic valve at the outlet of a large air compressor includes a first air source pipeline, a second air source pipeline, a first solenoid valve, a second solenoid valve, a power supply assembly, a pneumatic valve, and a flexible component.

[0009] The first gas source pipeline serves as a component for delivering the driving gas source;

[0010] The second gas source pipeline is connected to the first gas source pipeline to cooperate in supplying the driving gas source;

[0011] The first solenoid valve has a first interface, a second interface, and a third interface; the first interface and the second interface are connected to the first gas source pipeline; the third interface is connected to the second gas source pipeline.

[0012] The second solenoid valve has a fourth interface, a fifth interface, and a sixth interface; the fourth interface and the fifth interface are connected to the second air source pipeline; the fifth interface is connected to the third interface through the second air source pipeline; the sixth interface serves as an exhaust port.

[0013] The power supply assembly is connected to the first solenoid valve and the second solenoid valve and serves as a mechanism for supplying power to the first solenoid valve and the second solenoid valve.

[0014] The pneumatic valve is connected to the second interface through the first air source pipeline;

[0015] The elastic element is connected to the pneumatic valve and serves as a component for causing the pneumatic valve to close.

[0016] The power supply component is configured to have a power-on state and a power-off state:

[0017] In the power-on state, the first interface is connected to the second interface, the second interface is disconnected from the third interface, the fourth interface is connected to the fifth interface, and the fifth interface is disconnected from the sixth interface. The driving air source can enter the first interface through the first air source pipeline and can enter the fourth interface through the second air source pipeline. The driving air source can enter the pneumatic valve through the second interface to cause the elastic element to deform and to cause the pneumatic valve to open.

[0018] In the closed state, the first interface is disconnected from the second interface, the second interface is connected to the third interface, the fourth interface is disconnected from the fifth interface, and the fifth interface is connected to the sixth interface. The gas in the pneumatic valve can be discharged through the sixth interface to cause the elastic element to reset and the pneumatic valve to close.

[0019] In the above scheme, when both the first and second solenoid valves are in normal use, the operation is as follows:

[0020] When powered on, the coils of the first solenoid valve and the second solenoid valve are energized, the first interface is connected to the second interface, the second interface is disconnected from the third interface, the fourth interface is connected to the fifth interface, and the fifth interface is disconnected from the sixth interface. The driving air source enters through the first interface and exits through the second interface, then enters the pneumatic valve to compress the elastic element. At this time, the pneumatic valve opens, and the driving air source also enters through the fourth interface and exits through the fifth interface, then enters the third interface and is blocked.

[0021] In the closed state, the coils of the first and second solenoid valves are de-energized, the first and second ports are disconnected, the second and third ports are connected, the fourth and fifth ports are disconnected, and the fifth and sixth ports are connected. After the driving air source enters the first and fourth ports, the driving air source cannot enter the pneumatic valve because the first and second solenoid valves block the first and second air source pipelines. The residual gas in the pneumatic valve flows through the second, third, fifth, and sixth ports in sequence and is then discharged directly to the outside. The pneumatic valve closes under the action of the elastic element.

[0022] When the first solenoid valve is working normally but the second solenoid valve malfunctions, the operating situation is as follows:

[0023] In the power supply state, the coil of the first solenoid valve is energized while the coil of the second solenoid valve remains de-energized. The first interface is connected to the second interface, the second interface is disconnected from the third interface, the fourth interface is disconnected from the fifth interface, and the fifth interface is connected to the sixth interface. The driving air source enters through the first interface and exits through the second interface, then enters the pneumatic valve to compress the elastic element. At this time, the pneumatic valve opens, and the driving air source also enters through the fourth interface and is then blocked.

[0024] In the closed state, the coils of the first solenoid valve and the second solenoid valve remain de-energized, and the pneumatic valve closes under the action of the elastic element.

[0025] When the first solenoid valve malfunctions while the second solenoid valve is functioning normally, the operating conditions are as follows:

[0026] In the power-on state, the coil of the first solenoid valve remains de-energized while the coil of the second solenoid valve is energized. The first interface is disconnected from the second interface, the second interface is connected to the third interface, the fourth interface is connected to the fifth interface, and the fifth interface is disconnected from the sixth interface. The driving air source enters through the first interface and is then blocked. The driving air source enters through the fourth interface and exits through the fifth interface, then enters the pneumatic valve through the third and second interfaces to compress the elastic element. At this time, the pneumatic valve opens.

[0027] In the closed state, the coils of the first solenoid valve and the second solenoid valve remain de-energized, and the pneumatic valve closes under the action of the elastic element.

[0028] In this application, the first and second solenoid valves need to be energized for a long time, and the coils are in a heated state for a long time, which may lead to the failure of the first or second solenoid valve. However, by setting two solenoid valves, and either solenoid valve can be used independently to realize the opening and closing of the pneumatic valve, when either solenoid valve fails, the pneumatic valve will not suddenly close abnormally and cause equipment damage.

[0029] The above settings reduce the risk of accidental closure of the pneumatic valve, improve the reliability of its operation, and ensure the safe and stable operation of the entire compressed air system. In addition, they do not affect the rapid opening and closing of the pneumatic valve.

[0030] It should be noted that both the first and second solenoid valves are two-position three-way solenoid valves, with the first and fourth ports connected in parallel and the third and fifth ports connected in series.

[0031] In a further technical solution, the power supply assembly includes a first control power supply and a second control power supply;

[0032] The first control power supply is connected to the first solenoid valve and serves as a component for supplying power to the first solenoid valve.

[0033] The second control power supply is connected to the second solenoid valve and serves as a component for supplying power to the second solenoid valve.

[0034] When the power supply component is in a power supply state, the first control power supply supplies power to the first solenoid valve, and the second control power supply supplies power to the second solenoid valve.

[0035] When the power supply component is in the off state, the first control power supply stops supplying power to the first solenoid valve, and the second control power supply stops supplying power to the second solenoid valve.

[0036] This embodiment expands the power supply components by adding a first control power supply and a second control power supply, enabling independent power supply control for the first and second solenoid valves. When either the first or second control power supply fails, one of the first or second solenoid valves can continue to operate normally, avoiding situations such as sudden abnormal closure of the pneumatic valve leading to equipment damage.

[0037] The configuration in this embodiment further improves the reliability of the pneumatic valve operation, enabling it to cope with various abnormal situations and allowing the pneumatic valve to operate for a long time.

[0038] It should be noted that, taking the power supply component as an example when it is in the power supply state, the first control power supply supplies power to the first solenoid valve and the second control power supply supplies power to the second solenoid valve, but it does not restrict the first control power supply and the second control power supply to supply power separately in different time periods, which is more flexible than when the power supply component is not extended.

[0039] A further technical solution also includes a limiting component, which is connected to the first air source pipeline and serves as a component for restricting the driving air source from entering the first interface through the first air source pipeline and entering the fourth interface through the second air source pipeline.

[0040] Considering the possibility of pressure loss in the driving air source, this application includes a limiting component to handle this situation. When the driving air source loses pressure, if all solenoid valves are closed, the pneumatic valve cannot be opened. If all solenoid valves are open, the limiting component cuts off the first air source pipeline, preventing gas from being discharged through the first air source pipeline, thereby temporarily maintaining the pressure inside the pneumatic valve. This prevents the pneumatic valve from suddenly and abnormally closing, which could damage the equipment and provides time for maintenance personnel to handle the situation.

[0041] It is important to emphasize that, through the design of the second solenoid valve, the second control power supply, and limiting components, the normal operation of the equipment will not be affected if any control power supply or solenoid valve fails. Furthermore, when the driving air source pressure is abnormal, the pneumatic valve can remain open for a short period. These optimized designs significantly improve the reliability of the compressor outlet pneumatic quick-closing valve, greatly reduce the risk of accidental closure of the outlet pneumatic valve during compressor operation, and ensure the safe and stable operation of the entire compressed air system.

[0042] In a further technical solution, the limiting component is configured as a position-holding valve.

[0043] Position-holding valves enable precise control of gas flow. Compared to other simple blocking methods (such as directly blocking the gas source pipeline), position-holding valves can flexibly adjust the on / off state of the gas as needed.

[0044] In a further technical solution, the limiting component is configured as at least two, and each limiting component is connected to the first gas source pipeline.

[0045] By setting up more than one limiting component, the success rate of handling the situation of drive air source pressure loss is further improved, and the situation of drive air source pressure loss cannot be handled in a timely manner due to the failure of a single limiting component.

[0046] In a further technical solution, the elastic element is configured as a spring structure.

[0047] The spring structure provides a reliable reset function. When the driving air source pressure disappears or drops to a certain level, the spring structure can quickly push the valve core or valve disc of the pneumatic valve back to the initial position, so that the valve is closed.

[0048] In a further technical solution, the spring structure is configured as any one of a cylindrical helical compression spring, a disc spring, and a wave spring.

[0049] In a further technical solution, the elastic element is made of either rubber or silicone material.

[0050] The terms "first," "second," etc., used in this article do not specifically refer to order or sequence, nor are they intended to limit this case; they are merely used to distinguish components or operations described using the same technical terms.

[0051] The terms "connection" or "positioning" as used in this article can refer to two or more components or devices making direct physical contact with each other, or making indirect physical contact with each other, or to two or more components or devices operating or moving with each other.

[0052] The terms “include,” “including,” and “have” used in this article are all open-ended, meaning they include but are not limited to.

[0053] Unless otherwise specified, the terms used herein generally have their ordinary meaning in the context of the art, the subject matter, and the specific context. Certain terms used to describe this case will be discussed below or elsewhere in this specification to provide additional guidance to those skilled in the art in describing the case.

[0054] The terms “front,” “back,” “up,” “down,” “left,” and “right” used in this article are directional terms. In this case, they are only used to describe the positional relationship between the structures and are not intended to limit the specific direction of the protection scheme or its actual implementation.

[0055] The working principle and advantages of this utility model are as follows: Taking the example of the first solenoid valve working normally while the second solenoid valve malfunctions, in the power-on state, the coil of the first solenoid valve is energized while the coil of the second solenoid valve remains de-energized. The first interface is connected to the second interface, the second interface is disconnected from the third interface, the fourth interface is disconnected from the fifth interface, and the fifth interface is connected to the sixth interface. The driving air source enters through the first interface, exits through the second interface, and then enters the pneumatic valve to compress the elastic element. At this time, the pneumatic valve opens, and the driving air source also enters through the fourth interface and is then blocked. In the closed state, the coils of the first and second solenoid valves remain de-energized, and the pneumatic valve closes under the action of the elastic element. In this application, the first and second solenoid valves need to operate with power for a long time, and the coils are in a state of continuous heating, which may lead to the failure of either the first or second solenoid valve. However, by setting two solenoid valves, and allowing either solenoid valve to be used independently to open and close the pneumatic valve, the sudden abnormal closure of the pneumatic valve and the resulting equipment damage will not occur when either solenoid valve malfunctions. The above settings reduce the risk of accidental closure of the pneumatic valve, improve the reliability of its operation, and ensure the safe and stable operation of the entire compressed air system. In addition, they do not affect the rapid opening and closing of the pneumatic valve. Attached Figure Description

[0056] Figure 1 This is a schematic diagram of the control circuit for a single-acting, air-opening, quick-closing pneumatic valve at the outlet of a large air compressor in the prior art.

[0057] Figure 2 This is a schematic diagram of a control circuit for preventing accidental operation of a single-acting, quick-closing pneumatic valve at the outlet of a large air compressor, according to an embodiment of this utility model.

[0058] In the above attached diagram: 1. First air source pipeline; 2. Second air source pipeline; 3. First solenoid valve; 31. First interface; 32. Second interface; 33. Third interface; 4. Second solenoid valve; 41. Fourth interface; 42. Fifth interface; 43. Sixth interface; 5. Power supply assembly; 51. First control power supply; 52. Second control power supply; 6. Pneumatic valve; 7. Elastic element; 8. Limiting element. Detailed Implementation

[0059] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0060] Example: The present invention will be clearly described below with illustrations and detailed description. Any person skilled in the art who understands the examples of the present invention can make changes and modifications based on the technology taught in the present invention without departing from the spirit and scope of the present invention.

[0061] The terminology used herein is for the purpose of describing specific embodiments only and is not intended to limit the scope of this work. Singular forms such as “a,” “this,” “this,” “the,” and “the” as used herein also include plural forms.

[0062] See Figures 1-2 A control circuit for preventing accidental operation of a single-acting, quick-closing pneumatic valve at the outlet of a large air compressor includes a first air source pipeline 1, a second air source pipeline 2, a first solenoid valve 3, a second solenoid valve 4, a power supply assembly 5, a pneumatic valve 6, and an elastic element 7.

[0063] The first gas source pipeline 1 serves as a component for conveying the driving gas source;

[0064] The second gas source pipeline 2 is connected to the first gas source pipeline 1 to cooperate in supplying the driving gas source;

[0065] The first solenoid valve 3 has a first interface 31, a second interface 32, and a third interface 33; the first interface 31 and the second interface 32 are connected to the first gas source pipeline 1; the third interface 33 is connected to the second gas source pipeline 2.

[0066] The second solenoid valve 4 has a fourth interface 41, a fifth interface 42, and a sixth interface 43; the fourth interface 41 and the fifth interface 42 are connected to the second air source pipeline 2; the fifth interface 42 is connected to the third interface 33 through the second air source pipeline 2; and the sixth interface 43 serves as an exhaust port.

[0067] The power supply assembly 5 is connected to the first solenoid valve 3 and the second solenoid valve 4 and serves as a mechanism for supplying power to the first solenoid valve 3 and the second solenoid valve 4.

[0068] The pneumatic valve 6 is connected to the second interface 32 through the first air source pipeline 1;

[0069] The elastic element 7 is connected to the pneumatic valve 6 and serves as a component for causing the pneumatic valve 6 to close.

[0070] The power supply component 5 is configured to have a power-on state and a power-off state:

[0071] In the power-on state, the first interface 31 is connected to the second interface 32, the second interface 32 is disconnected from the third interface 33, the fourth interface 41 is connected to the fifth interface 42, the fifth interface 42 is disconnected from the sixth interface 43, the driving air source can enter the first interface 31 through the first air source pipeline 1 and can enter the fourth interface 41 through the second air source pipeline 2, and the driving air source can enter the pneumatic valve 6 through the second interface 32 to cause the elastic element 7 to deform and cause the pneumatic valve 6 to open;

[0072] In the closed state, the first interface 31 is disconnected from the second interface 32, the second interface 32 is connected to the third interface 33, the fourth interface 41 is disconnected from the fifth interface 42, the fifth interface 42 is connected to the sixth interface 43, and the gas in the pneumatic valve 6 can be discharged through the sixth interface 43 to cause the elastic element 7 to reset and to cause the pneumatic valve 6 to close.

[0073] When both the first solenoid valve 3 and the second solenoid valve 4 are in normal use, the operating conditions are as follows:

[0074] When powered on, the coils of the first solenoid valve 3 and the second solenoid valve 4 are energized. The first port 31 is connected to the second port 32, the second port 32 is disconnected from the third port 33, the fourth port 41 is connected to the fifth port 42, and the fifth port 42 is disconnected from the sixth port 43. The driving air source enters through the first port 31 and exits through the second port 32, then enters the pneumatic valve 6 to compress the elastic element 7. At this time, the pneumatic valve 6 is opened, and the driving air source also enters through the fourth port 41 and exits through the fifth port 42, then enters the third port 33 and is blocked.

[0075] In the closed state, the coils of the first solenoid valve 3 and the second solenoid valve 4 are de-energized, the first interface 31 is disconnected from the second interface 32, the second interface 32 is connected to the third interface 33, the fourth interface 41 is disconnected from the fifth interface 42, and the fifth interface 42 is connected to the sixth interface 43. After the driving air source enters the first interface 31 and the fourth interface 41, the driving air source cannot enter the pneumatic valve 6 because the first solenoid valve 3 and the second solenoid valve 4 block the first air source pipeline 1 and the second air source pipeline 2. The residual gas in the pneumatic valve 6 flows through the second interface 32, the third interface 33, the fifth interface 42 and the sixth interface 43 in sequence and is then discharged directly to the outside. The pneumatic valve 6 is closed under the action of the elastic element 7.

[0076] When the first solenoid valve 3 is working normally but the second solenoid valve 4 malfunctions, the operating situation is as follows:

[0077] In the power-on state, the coil of the first solenoid valve 3 is energized while the coil of the second solenoid valve 4 remains de-energized. The first interface 31 is connected to the second interface 32, the second interface 32 is disconnected from the third interface 33, the fourth interface 41 is disconnected from the fifth interface 42, and the fifth interface 42 is connected to the sixth interface 43. The driving air source enters through the first interface 31 and exits through the second interface 32, then enters the pneumatic valve 6 to compress the elastic element 7. At this time, the pneumatic valve 6 is opened, and the driving air source also enters through the fourth interface 41 and is then blocked.

[0078] In the closed state, the coils of the first solenoid valve 3 and the second solenoid valve 4 remain de-energized, and the pneumatic valve 6 is closed under the action of the elastic element 7.

[0079] When the first solenoid valve 3 malfunctions while the second solenoid valve 4 is working normally, the operating conditions are as follows:

[0080] In the power-on state, the coil of the first solenoid valve 3 remains de-energized while the coil of the second solenoid valve 4 is energized. The first interface 31 is disconnected from the second interface 32, the second interface 32 is connected to the third interface 33, the fourth interface 41 is connected to the fifth interface 42, and the fifth interface 42 is disconnected from the sixth interface 43. The driving air source enters through the first interface 31 and is then blocked. The driving air source enters through the fourth interface 41 and exits through the fifth interface 42, then enters the pneumatic valve 6 through the third interface 33 and the second interface 32 to compress the elastic element 7. At this time, the pneumatic valve 6 is opened.

[0081] In the closed state, the coils of the first solenoid valve 3 and the second solenoid valve 4 remain de-energized, and the pneumatic valve 6 is closed under the action of the elastic element 7.

[0082] In this application, the first solenoid valve 3 and the second solenoid valve 4 need to be energized for a long time, and the coils are in a heated state for a long time. This may lead to the failure of the first solenoid valve 3 or the second solenoid valve 4. However, by setting two solenoid valves, and either solenoid valve can be used independently to open and close the pneumatic valve 6, the pneumatic valve 6 will not suddenly close abnormally and cause equipment damage when either solenoid valve fails.

[0083] The above settings reduce the risk of accidental closure of pneumatic valve 6, improve the reliability of pneumatic valve 6 operation, and ensure the safe and stable operation of the entire compressed air system; in addition, they do not affect the rapid opening and closing of pneumatic valve 6.

[0084] It should be noted that both the first solenoid valve 3 and the second solenoid valve 4 are two-position three-way solenoid valves, with the first port 31 and the fourth port 41 connected in parallel, and the third port 33 and the fifth port 42 connected in series.

[0085] See Figure 2 In this embodiment, the power supply component 5 includes a first control power supply 51 and a second control power supply 52;

[0086] The first control power supply 51 is connected to the first solenoid valve 3 and serves as a component for supplying power to the first solenoid valve 3.

[0087] The second control power supply 52 is connected to the second solenoid valve 4 and serves as a component for supplying power to the second solenoid valve 4.

[0088] When the power supply component 5 is in the power supply state, the first control power supply 51 supplies power to the first solenoid valve 3, and the second control power supply 52 supplies power to the second solenoid valve 4.

[0089] When the power supply component 5 is in the off state, the first control power supply 51 stops supplying power to the first solenoid valve 3, and the second control power supply 52 stops supplying power to the second solenoid valve 4.

[0090] This embodiment expands the power supply component 5 by expanding the first control power supply 51 and the second control power supply 52, so that the first solenoid valve 3 and the second solenoid valve can be independently powered and controlled. When the first control power supply 51 or the second control power supply 52 fails, one of the first solenoid valve 3 and the second solenoid valve can continue to work normally, avoiding the situation where the pneumatic valve 6 suddenly closes abnormally and causes equipment damage.

[0091] The configuration in this embodiment further improves the reliability of the pneumatic valve 6, enabling it to cope with various abnormal situations and allowing the pneumatic valve 6 to operate for a long time.

[0092] It should be noted that, taking the power supply component 5 as an example when it is in the power supply state, the first control power supply 51 supplies power to the first solenoid valve 3 and the second control power supply 52 supplies power to the second solenoid valve 4. However, it does not restrict the first control power supply 51 and the second control power supply 52 to supply power separately in different time periods. Compared with the case where the power supply component 5 is not extended, the usage is more flexible.

[0093] See Figure 2 In this embodiment, a limiting member 8 is also included. The limiting member 8 is connected to the first air source pipeline 1 and serves as a component for restricting the driving air source from entering the first interface 31 through the first air source pipeline 1 and entering the fourth interface 41 through the second air source pipeline 2.

[0094] After the driving air source enters the first air source pipeline 1, it must first pass through the limiting component 8 before it can enter the second air source pipeline 2.

[0095] Considering the possibility of pressure loss in the driving air source, this application includes a limiting component 8 for handling. When the driving air source loses pressure, if all solenoid valves are closed, the pneumatic valve 6 cannot be opened. If all solenoid valves are open, the limiting component 8 cuts off the first air source pipeline 1, preventing gas from being discharged through the first air source pipeline 1, thereby temporarily maintaining the pressure inside the pneumatic valve 6 to avoid sudden abnormal closure of the pneumatic valve 6 and damage to the equipment, and providing time for maintenance personnel to handle the situation.

[0096] If all solenoid valves are open after the driving air source loses pressure, in order to achieve normal closure of pneumatic valve 6, follow the steps for closing pneumatic valve 6 as described above.

[0097] The reasons for loss of pressure in the driving air source are varied, such as blockage of the air compressor's air inlet.

[0098] The alarm handling settings after the drive air source loses pressure are not required in this application.

[0099] It is important to emphasize that, through the design of the second solenoid valve 4, the second control power supply 52, and the limiting component 8, the normal operation of the equipment will not be affected if any control power supply or any solenoid valve fails. Furthermore, when the driving air source pressure is abnormal, the pneumatic valve 6 can remain open for a short period. These optimized designs significantly improve the reliability of the compressor outlet pneumatic quick-closing valve, greatly reduce the risk of accidental closure of the outlet pneumatic valve during compressor operation, and ensure the safe and stable operation of the entire compressed air system.

[0100] See Figure 2 In this embodiment, the limiting element 8 is configured as a position holding valve.

[0101] Position-holding valves enable precise control of gas flow. Compared to other simple blocking methods (such as directly blocking the gas source pipeline), position-holding valves can flexibly adjust the on / off state of the gas as needed.

[0102] See Figure 2 In this embodiment, at least two limiting members 8 are provided, and each limiting member 8 is connected to the first gas source pipeline 1.

[0103] By setting up more than one limiting component 8, the success rate of handling the situation of drive air source pressure loss is further improved, and the situation of drive air source pressure loss cannot be handled in time due to the failure of a single limiting component 8.

[0104] See Figure 2 In this embodiment, the elastic element 7 is configured as a spring structure.

[0105] The spring structure provides a reliable reset function. When the driving air source pressure disappears or drops to a certain level, the spring structure can quickly push the valve core or valve disc of the pneumatic valve 6 back to the initial position, so that the valve is closed.

[0106] See Figure 2 In this embodiment, the spring structure is configured as any one of a cylindrical helical compression spring, a disc spring, and a wave spring.

[0107] Other types of spring structures are not limited to use in other embodiments.

[0108] See Figure 2 In this embodiment, the elastic element 7 is made of either rubber or silicone.

[0109] Other types of elastic structures, such as magnetic structures, are not limited to use in other embodiments.

[0110] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the scope of protection of this utility model.

Claims

1. A large air compressor outlet single-acting air opening type fast closing pneumatic valve anti-misoperation control circuit, characterized in that: The utility model relates to a kind of gas supply systems, including first gas source pipeline (1), second gas source pipeline (2), first electromagnetic valve (3), second electromagnetic valve (4), power supply component (5), pneumatic valve (6) and elastic member (7); The first gas source pipeline (1) is used to transport driving gas source; The second gas source pipeline (2) is connected with the first gas source pipeline (1) to cooperate with the driving gas source; The first electromagnetic valve (3) has a first interface (31), a second interface (32) and a third interface (33); The first interface (31) and the second interface (32) are connected to the first gas source pipeline (1); The third interface (33) is connected to the second gas source pipeline (2); The second electromagnetic valve (4) has a fourth interface (41), a fifth interface (42) and a sixth interface (43); The fourth interface (41) and the fifth interface (42) are connected to the second gas source pipeline (2); The fifth interface (42) is communicated with the third interface (33) through the second gas source pipeline (2); The sixth interface (43) is used as an exhaust port; The power supply component (5) is connected to the first electromagnetic valve (3) and the second electromagnetic valve (4) and is used to supply power to the first electromagnetic valve (3) and the second electromagnetic valve (4); The pneumatic valve (6) is connected to the second interface (32) through the first gas source pipeline (1); The elastic member (7) is connected to the pneumatic valve (6) and is used to promote the closing of the pneumatic valve (6); The power supply component (5) is configured to have a power supply state and a closed state: In the power supply state, the first interface (31) and the second interface (32) are communicated, the second interface (32) is disconnected with the third interface (33), the fourth interface (41) and the fifth interface (42) are communicated, the fifth interface (42) is disconnected with the sixth interface (43), the driving gas source can enter the first interface (31) through the first gas source pipeline (1) and can enter the fourth interface (41) through the second gas source pipeline (2), the driving gas source can enter the pneumatic valve (6) through the second interface (32) to promote the deformation of the elastic member (7) and the opening of the pneumatic valve (6); In the closed state, the first interface (31) and the second interface (32) are disconnected, the second interface (32) is communicated with the third interface (33), the fourth interface (41) and the fifth interface (42) are disconnected, the fifth interface (42) is communicated with the sixth interface (43), the gas in the pneumatic valve (6) can be discharged through the sixth interface (43) to reset the elastic member (7) and close the pneumatic valve (6).

2. A control circuit for preventing misoperation of a single-acting air-opening quick-closing pneumatic valve at the outlet of a large air compressor according to claim 1, characterized in that: The power supply component (5) includes a first control power supply (51) and a second control power supply (52); The first control power supply (51) is connected to the first electromagnetic valve (3) and is used to supply power to the first electromagnetic valve (3). The second control power supply (52) is connected to the second electromagnetic valve (4) and serves as a component for supplying power to the second electromagnetic valve (4); When the power supply assembly (5) is in the power-on state, the first control power supply (51) supplies power to the first electromagnetic valve (3), and the second control power supply (52) supplies power to the second electromagnetic valve (4); When the power supply assembly (5) is in the power-off state, the first control power supply (51) stops supplying power to the first electromagnetic valve (3), and the second control power supply (52) stops supplying power to the second electromagnetic valve (4).

3. A control circuit for preventing misoperation of a single-acting air-opening quick-closing pneumatic valve at the outlet of a large air compressor according to claim 1 or 2, characterized in that: Further comprising a limiting member (8) connected to the first gas source pipeline (1) and serving as a component for limiting the driving gas source from entering the first interface (31) through the first gas source pipeline (1) and entering the fourth interface (41) through the second gas source pipeline (2).

4. A control circuit for preventing misoperation of a single-acting air-opening quick-closing pneumatic valve at the outlet of a large air compressor according to claim 3, characterized in that: The limiting member (8) is configured as a retaining valve.

5. A control circuit for preventing misoperation of a single-acting air opening type quick-closing pneumatic valve at an outlet of a large air compressor according to claim 3, characterized in that: The limiting member (8) is configured as at least two, and each limiting member (8) is connected to the first gas source pipeline (1).

6. A large air compressor outlet single acting air opening type quick closing pneumatic valve anti-misoperation control circuit according to claim 1, characterized in that: The elastic member (7) is configured as a spring structure.

7. A control circuit for preventing misoperation of a single-acting air-opening quick-closing pneumatic valve at the outlet of a large air compressor according to claim 6, characterized in that: The spring structure is configured as any one of a cylindrical spiral compression spring, a disc spring, and a wave spring.

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