Electrical control device of gear type pneumatic motor actuating mechanism

Abstract

An electrical control device of a gear type pneumatic motor actuating mechanism comprises a valve opening mechanism and a valve closing mechanism which are respectively connected with a power supply and used for controlling a pneumatic motor, one end of the valve opening mechanism and one end of the valve closing mechanism are connected to a same air source input port A, and the other end of the valve opening mechanism and the other end of the valve closing mechanism are respectively connected to an opening valve output port and a closing valve output port of the pneumatic motor. One end of the fault control mechanism is connected to the air source input port B, the other end of the fault control mechanism is connected to an output port of the pneumatic motor closed valve, and air pressure input by the air source input port A and the air source input port B comprises working air pressure and fault air pressure. The fault control mechanism is used for controlling the pneumatic motor to act when the air pressure input by the air source input port A is smaller than the fault air pressure. The utility model has the beneficial effects that the fault control mechanism is arranged to provide an emergency valve closing protection function when the air pressure is insufficient, so that the situation that the valve cannot be closed due to the failure of the motor caused by the air pressure drop is effectively prevented.

Description

TECHNICAL FIELD

[0001] The utility model relates to a control device especially relates to a kind of electrical control device of gear type pneumatic motor actuator. BACKGROUND

[0002] The electrical control device of gear type pneumatic motor actuator is a system for accurately controlling pneumatic motor operation.The device usually includes one or more solenoid valves to control the flow direction of compressed air, so as to realize the functions of starting, stopping, forward and reverse rotation and speed regulation of gear type pneumatic motor. These solenoid valves are driven by the instructions issued by the controller in the electrical control circuit or the operator interface, ensuring that the pneumatic motor actuator can quickly respond and accurately perform the predetermined action.

[0003] If the electrical control device of gear type pneumatic motor actuator fails to close the valve in emergency, it may cause a series of serious problems. First, the inability to control the valve may cause fluid to flow unrestricted, resulting in resource waste, environmental pollution, and even equipment damage. Second, in industrial processes, the inability to promptly shut off the fluid may cause safety accidents such as excessive pressure, leakage or fire, threatening personnel safety and production stability. In addition, if the failure occurs in a process that requires precise control, it may cause product quality problems, affecting the reputation and economic benefits of the enterprise. Therefore, ensuring the reliability and emergency response capability of the electrical control device is crucial for the safe and effective operation of the entire system. SUMMARY

[0004] To overcome the shortcomings of the prior art, the utility model provides an electrical control device of gear type pneumatic motor actuator with the function of closing the valve in case of air path failure.

[0005] To achieve the above-mentioned purpose, the utility model technical scheme is as follows: an electrical control device of gear type pneumatic motor actuator, comprising an opening valve mechanism and a closing valve mechanism connected to a power supply respectively and used for controlling a pneumatic motor, one end of the opening valve mechanism and the closing valve mechanism being connected to the same air source input port A, the other end being connected to the output port of the pneumatic motor opening valve and closing valve respectively, and the other end being connected to the power supply, characterized in that: it further comprises a fault control mechanism, one end of the fault control mechanism being connected to air source input port B, and the other end being connected to the output port of the pneumatic motor closing valve or the output port of the pneumatic motor opening valve, the air pressure input by the air source input port A and the air source input port B including working air pressure and fault air pressure, and there is a buffer part between the working air pressure and the fault air pressure, the fault control mechanism being used for outputting air pressure to the output port of the pneumatic motor closing valve or the output port of the pneumatic motor opening valve and controlling the pneumatic motor closing valve or opening valve when the air pressure input by the air source input port A is less than the fault air pressure.

[0006] The utility model discloses a beneficial effect is: through the valve mechanism, the valve mechanism and the failure control mechanism, realized accurate control and safety protection to pneumatic motor. Failure control mechanism according to the need of the specific opening and closing position of valve when valve failure, its one end is connected on the spare gas source input port B, the other end controls the output port of pneumatic motor closed valve or the output port of pneumatic motor open valve, provides the emergency closed valve or emergency open valve protection function when the insufficient air pressure, effectively prevent the motor failure caused by air pressure drop and cannot control valve. And the failure maintaining mode in the prior art cannot satisfy the demand of some special valve (gas failure open / gas failure close), increase the failure control mechanism to the gas of motor to control valve opening and closing can satisfy the installation demand of these special valves.

[0007] The buffer part between working air pressure and failure air pressure is designed, which provides a stable pressure transition for the system, prevents the false start of the failure control mechanism, and enhances the reliability and safety of the system. This design not only ensures the efficient operation of the pneumatic motor under normal working conditions, but also enables the pneumatic motor to be safely closed through the failure control mechanism in the event of insufficient air pressure, thereby avoiding potential mechanical damage or safety accidents.

[0008] Further, the failure control mechanism includes a check valve A, a gas tank and a two-way air control valve connected in sequence between the gas source input port B and the pneumatic motor closed valve output port, and a locking valve connected between the gas source input port A and the two-way air control valve.

[0009] In the electrical control device of the gear type pneumatic motor actuator, the design of the failure control mechanism includes a check valve A, a gas tank and a two-way air control valve, which are connected in sequence between the gas source input port B and the pneumatic motor closed valve output port. This configuration ensures that the gas tank can serve as an emergency gas source to provide the necessary air pressure for the pneumatic motor when the working air pressure drops, thereby maintaining its operation or safely closing it. The check valve A ensures that the gas flow can only flow from the gas source input port B to the gas tank, preventing reverse flow and ensuring the stability of the system. The gas tank acts as a buffer in the system, and it can release the stored gas when the air pressure drops, providing additional air pressure support for the pneumatic motor. The two-way air control valve is used to control the on-off of the gas flow, ensuring that it can be quickly cut off or adjusted when needed. The locking valve is installed between the gas source input port A and the two-way air control valve, and its function is to prevent the gas in the gas tank from flowing into the pneumatic motor when the air pressure input port A inputs air pressure at the working air pressure, thereby avoiding false start.

[0010] Further, a check valve B is provided between the gas source input port A and the open valve mechanism and the closed valve mechanism, and the connection position between the locking valve and the gas source input port A is located before the check valve B.

[0011] The lock valve is located before the check valve B and is directly connected to the air source inlet A. This design allows the lock valve to more accurately reflect changes in the air pressure at the air source inlet A. When the air pressure at the air source inlet A drops, the lock valve can respond quickly and promptly restore the connection between the air tank and the air motor's closed valve output. This rapid response capability is crucial to maintaining system stability and safety. In addition, the placement of the check valve B between the air source inlet A and the valve opening mechanism provides an additional layer of protection for the system. This ensures that if a problem occurs at the air source inlet A, airflow is blocked from entering the valve opening mechanism, thereby preventing the possible spread of the fault.

[0012] Furthermore, one end of the gas storage tank is connected to the gas source input port A via a one-way valve B; the interior of the gas storage tank has an initial air pressure.

[0013] In the electrical control device of the geared pneumatic motor actuator, the design of the air tank includes one end connected to the air source input port A through a one-way valve B. This configuration realizes the dual input gas supply of the air tank. This design allows the air source input port A and the air source input port B (through the one-way valve B) to supply the air tank at the same time, improving the reliability and flexibility of the air supply. In the event of a failure of the air source input port B, the air tank can still obtain air pressure from the air source input port A, ensuring the continuous operation of the system in the event of a single air source failure. In addition, the existence of the initial air pressure inside the air tank prevents the air tank from malfunctioning due to lack of air pressure. It ensures that the air tank can immediately provide the necessary air pressure to achieve the valve closing effect after installation or when the air supply is unstable.

[0014] Furthermore, a pressure gauge for monitoring the input pressure from the air source input port A is provided between the air source input port A and the output port of the air motor for opening and closing the valve.

[0015] In the electrical control device for a geared pneumatic motor actuator, a pressure gauge is installed between the air source input port A and the pneumatic motor's valve opening and closing output ports to monitor the air pressure at input port A in real time. This pressure gauge provides precise pressure readings at input port A, allowing operators to promptly monitor the air supply status. By monitoring air pressure, performance degradation or failure of the pneumatic motor caused by insufficient air pressure can be prevented, while also enabling timely detection and resolution of system damage caused by excessive air pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic structural diagram of an embodiment of the utility model;

[0017] Figure 2 This is the electrical control principle diagram of an embodiment of the utility model. DETAILED DESCRIPTION

[0018] The utility model discloses an electrical control device of gear type pneumatic motor actuator like Figures 1-2 As shown: between the gas source input port A1 and the pneumatic motor open valve output port 3 and the pneumatic motor close valve output port 4, set up one-way valve B11, through the manual control operation pneumatic motor open-close valve three position four way hand switch 12 and pressure gauge 13 for monitoring the pressure input from gas source input port A1 when fault, three position four way hand switch 12 how to connect between the above two and how to work all belong to prior art, here too much repetition.

[0019] Between one-way valve B11 and pneumatic motor open valve output port 3, set up open valve mechanism 5, open valve mechanism 5 includes two position three way solenoid valve A51 one end is connected on the same gas source input port A1, the other end is connected on pneumatic motor open valve output port 3 respectively, still one end is connected on power supply (not shown in the drawing) respectively, two way gas control valve B52 one end is connected with two position three way solenoid valve A51, the other two ends are connected gas source input port A1 and pneumatic motor open valve output port 3 respectively, after two position three way solenoid valve A51 is controlled by electric signal, it makes two way gas control valve B52 connect gas source input port A1 and pneumatic motor open valve output port 3 to control pneumatic motor 8 open valve;Between one-way valve B11 and pneumatic motor close valve output port 4, set up close valve mechanism 6, close valve mechanism 6 includes two position three way solenoid valve B61 one end is connected on the same gas source input port A1, the other end is connected on pneumatic motor close valve output port 4 respectively, still one end is connected on power supply (not shown in the drawing) respectively, two way gas control valve C62 one end is connected with two position three way solenoid valve B61, the other two ends are connected gas source input port A1 and pneumatic motor close valve output port 4 respectively, after two position three way solenoid valve B61 is controlled by electric signal, it makes two way gas control valve C62 connect gas source input port A1 and pneumatic motor close valve output port 4 to control pneumatic motor 8 close valve.

[0020] Between gas source output port B2 and pneumatic motor close valve output port B, set up fault control mechanism 7, fault control mechanism 7 includes two way gas control valve A73, gas tank 72 and one-way valve A71 that connect in gas source input port B2 and pneumatic motor close valve output port 4 according to the order, two way gas control valve A73 is connected with lock valve 74, and the lock valve 71 is directly connected on gas source input port A1 by skipping one-way valve B11 to control two way gas control valve A73 to disconnect the connection between gas tank 72 and pneumatic motor close valve output port 4 when the input pressure of gas source input port A1 is at working pressure.In addition, one end of the gas tank 72 is connected to the gas source input port A1 through the one-way valve B11, and the gas tank 72 has an initial gas pressure inside.

[0021] It should be noted that in the present embodiment, the working pressure is greater than 0.14 MPa, the failure pressure is less than 0.1 MPa, and the buffer pressure part between the two is 0.04 MPa. As shown in FIG. Figure 2 As shown in FIG. 1 (where the blue line is the gas source line; the black line is the power supply line), the working state of the present embodiment when a failure occurs is as follows: under the working pressure, the gas tank 72 stores gas for standby, the gas source enters the two-way gas control valve A73 (normally open type) Z port (gas control port) on the valve closing bypass through the lock valve 74, and the pipeline is closed; when the input pressure at the gas source input port A1 is within the failure pressure range, the lock valve 74 is disconnected, the control of the two-way gas control valve A73 (normally open type) on the bypass is lost, the P port and the A port of the two-way gas control valve A73 (normally open type) are connected, and the pipeline is opened. The gas source of the gas tank 72 enters through the P port of the gas control valve (normally open type) and the A port to perform the valve closing action until the valve is fully closed.

[0022] As a preferred way, a limit switch is arranged in the pneumatic motor 8, which is used to block the gas source when the valve is in the fully closed state.

[0023] The above embodiment is only one of the preferred specific embodiments of the present application, and the usual changes and replacements made by those skilled in the art within the scope of the technical scheme of the present application are also included in the protection scope of the present application.

Claims

1. An electrical control device for a geared pneumatic motor actuator, comprising a valve opening mechanism and a valve closing mechanism, each connected to a power source and used to control the pneumatic motor, wherein one end of each valve opening mechanism and valve closing mechanism is connected to a common air source input port A, the other end is connected to the opening and closing valve output ports of the pneumatic motor, and the other end is connected to the power source, characterized in that: It also includes a fault control mechanism, one end of which is connected to the air source input port B, and the other end is connected to the output port of the pneumatic motor closing valve or the output port of the pneumatic motor opening valve. The air pressure input to the air source input port A and the air source input port B includes the working air pressure and the fault air pressure, and there is a buffer part between the working air pressure and the fault air pressure. When the air pressure input to the air source input port A is lower than the fault air pressure, the fault control mechanism is used to output air pressure to the output port of the pneumatic motor closing valve or the output port of the pneumatic motor opening valve and control the pneumatic motor to close the valve or open the valve.

2. The electrical control device for the gear-type pneumatic motor actuator according to claim 1, characterized in that: The fault control mechanism includes a one-way valve A, an air storage tank and a two-way air control valve connected in sequence between the air source input port B and the air motor closed valve output port. A locking valve is connected between the air source input port A and the two-way air control valve. The locking valve is used to disconnect the connection between the air storage tank and the air motor closed valve output port.

3. The electrical control device for the gear-type pneumatic motor actuator according to claim 2, characterized in that: A one-way valve B is provided between the gas source input port A and the valve opening mechanism and the valve closing mechanism. The connection position between the locking valve and the gas source input port A is located before the one-way valve B.

4. The electrical control device for the gear-type pneumatic motor actuator according to claim 3, characterized in that: Another end of the gas storage tank is connected to the gas source input port A via a one-way valve B; the interior of the gas storage tank has an initial gas pressure.

5. The electrical control device for the gear-type pneumatic motor actuator according to claim 2, characterized in that: A pressure gauge for monitoring the input pressure from the air source input port A is provided between the air source input port A and the output port of the air motor for opening and closing the valve.

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