CN-224214817-U - Pneumatic valve control device based on gas storage tank and air source amplifier

Abstract

The utility model discloses a pneumatic valve control device based on an air storage tank and an air source amplifier, and relates to the field of pneumatic valve control devices. The traditional pneumatic valve lacks an effective emergency air supply guarantee mechanism, the valve cannot be closed rapidly, a great threat is formed to personnel safety and production environment, and the gas has larger resistance in the process of transmission and control, so that the valve is slow in switch response. The utility model comprises an air filtering pressure reducing valve, an electric valve positioner, a first air source amplifier, a second air source amplifier, a pneumatic actuator, a limit switch, an air storage tank, an electromagnetic valve, a first pneumatic valve, a second pneumatic valve and a valve body. The device can adjust the air inflow according to the system demand, ensures the stability and accuracy of valve action, realizes the quick response of valve action, automatically switches to the standby air source of the air storage tank when encountering an air-break fault, drives the valve to be quickly and accurately closed, and effectively prevents the safety accident possibly caused by the out-of-control of the valve.

Inventors

• CHEN CHAOHAO
• HUANG YAN
• HU JINCHEN
• WANG LEI

Assignees

• 东辰智能科技有限公司

Dates

Publication Date

20260508

Application Date

20250523

Claims (8)

1. 1. The pneumatic valve control device based on the air storage tank and the air source amplifier is characterized by comprising an air filtering pressure reducing valve, an electric valve positioner, a first air source amplifier, a second air source amplifier, a pneumatic actuator, a limit switch, the air storage tank, an electromagnetic valve, a first pneumatic valve, a second pneumatic valve and a valve body; The input end of the air filtering pressure reducing valve is connected with an external air source, and the output end of the air filtering pressure reducing valve is respectively connected with the electric valve positioner, the first air source amplifier, the second air source amplifier and the air inlet end of the electromagnetic valve in parallel; the electric valve positioner is provided with two output ends which are respectively connected with the control ends of the first air source amplifier and the second air source amplifier; The first interface of the air storage tank is connected with a pipeline between an external air source and the input end of the air filtering pressure reducing valve, and the output end of the first air source amplifier and the second interface of the air storage tank are connected with the extending port of the pneumatic actuator through the first pneumatic valve; The output end of the second air source amplifier is connected with the retraction port of the pneumatic actuator through a second pneumatic valve; the air outlet end of the electromagnetic valve is connected with the control ends of the first pneumatic valve and the second pneumatic valve through control pipelines; The driving shaft of the pneumatic actuator is connected with the valve body to control the valve to open and close, and the limit switch is arranged between the pneumatic actuator and the valve body.
2. 2. The pneumatic valve control device based on the air storage tank and the air source amplifier according to claim 1, wherein the first interface of the air storage tank, the external air source and the input end of the air filtering and reducing valve are connected through a first three-way connecting piece, and a one-way valve with the air flow direction facing the first three-way connecting piece is arranged at the first interface of the air storage tank.
3. 3. The pneumatic valve control device based on the air storage tank and the air source amplifier according to claim 2, wherein the output end of the air filtering and reducing valve is sequentially connected with a second three-way connecting piece, a third three-way connecting piece and a fourth three-way connecting piece in series through a pipeline, three interfaces of the second three-way connecting piece are respectively connected with the output end of the air filtering and reducing valve, the input end of the electric valve positioner and the third three-way connecting piece, the other two interfaces of the third three-way connecting piece are respectively connected with the input end of the second air source amplifier and the fourth three-way connecting piece, and the other two interfaces of the fourth three-way connecting piece are respectively connected with the air inlet end of the electromagnetic valve and the input end of the first air source amplifier.
4. 4. A pneumatic valve control device based on an air storage tank and an air source amplifier is characterized in that control ports of a first pneumatic valve and a second pneumatic valve are arranged in opposite directions and are symmetrically connected through a fifth three-way connecting piece, and the other port of the fifth three-way connecting piece is connected to an air outlet end of the electromagnetic valve through a control pipeline.
5. 5. The pneumatic valve control device based on the air storage tank and the air source amplifier according to claim 4, wherein the first pneumatic valve and the second pneumatic valve are two-position three-way pneumatic control valves, the main air paths of the pneumatic valve control device are respectively connected with the output ends of the first air source amplifier and the second air source amplifier and corresponding driving ports of the pneumatic actuator, and the output air pressure of the control air path electromagnetic valve is driven to switch.
6. 6. The pneumatic valve control device based on the air storage tank and the air source amplifier according to claim 5, wherein the air storage tank is provided with an external air supply air path to maintain the pressure of the air storage tank stable through air supplement.
7. 7. The pneumatic valve control device based on the air storage tank and the air source amplifier according to claim 6, wherein the output end of the air filtering and reducing valve is provided with a pressure sensor, and a signal line of the pressure sensor is connected to the electromagnetic valve.
8. 8. The pneumatic valve control device based on the air storage tank and the air source amplifier as set forth in claim 7, wherein the output port of the air storage tank is provided with a safety relief valve.

Description

Pneumatic valve control device based on gas storage tank and air source amplifier Technical Field The utility model relates to the field of pneumatic valve control devices, in particular to a pneumatic valve control device based on an air storage tank and an air source amplifier. Background In the field of industrial automation, pneumatic valves are widely used as key equipment for realizing fluid control in petrochemical industry, electric power energy, food processing and other industries. However, conventional pneumatic valve control approaches present significant technical bottlenecks. For example, when the gas source is interrupted and other sudden faults occur, due to the lack of an emergency gas supply guarantee mechanism, the valve cannot be closed rapidly, so that medium leakage of a pipeline, overpressure operation of equipment and even serious accidents such as fire or explosion are caused, and the safety of personnel and the production environment are threatened. On the other hand, in the existing gas path system, the gas has larger resistance in the transmission and control process, and the valve positioning and the driving mechanism have poor cooperativity, so that the valve opening and closing response is slow, the production flow efficiency is low, and the severe requirements of the modern industry on the production continuity and the high efficiency are difficult to meet. In addition, the traditional pneumatic valve control mode has the defect in the aspect of accurate adjustment of valve opening, cannot realize accurate control of fluid flow, and causes energy waste and product quality fluctuation. With the rapid development of industrial automation technology, there is an urgent need for an apparatus that can effectively solve the above problems, and realize rapid response, accurate control, and safe and reliable operation of pneumatic valves. Disclosure of utility model The utility model aims to solve the technical problems and the technical task of improving the prior art, and provides a pneumatic valve control device based on an air storage tank and an air source amplifier, so as to ensure the stability and the accuracy of valve action, realize the quick and reliable response of a pneumatic valve, and achieve the purpose of quickly and accurately closing the pneumatic valve in case of air-break faults. For this purpose, the present utility model adopts the following technical scheme. A pneumatic valve control device based on an air storage tank and an air source amplifier comprises an air filtering pressure reducing valve, an electric valve positioner, a first air source amplifier, a second air source amplifier, a pneumatic actuator, a limit switch, an air storage tank, an electromagnetic valve, a first pneumatic valve, a second pneumatic valve and a valve body; The input end of the air filtering pressure reducing valve is connected with an external air source, and the output end of the air filtering pressure reducing valve is respectively connected with the electric valve positioner, the first air source amplifier, the second air source amplifier and the air inlet end of the electromagnetic valve in parallel; the electric valve positioner is provided with two output ends which are respectively connected with the control ends of the first air source amplifier and the second air source amplifier; The first interface of the air storage tank is connected with a pipeline between an external air source and the input end of the air filtering pressure reducing valve, and the output end of the first air source amplifier and the second interface of the air storage tank are connected with the extending port of the pneumatic actuator through the first pneumatic valve; The output end of the second air source amplifier is connected with the retraction port of the pneumatic actuator through a second pneumatic valve; the air outlet end of the electromagnetic valve is connected with the control ends of the first pneumatic valve and the second pneumatic valve through control pipelines; The driving shaft of the pneumatic actuator is connected with the valve body to control the valve to open and close, and the limit switch is arranged between the pneumatic actuator and the valve body. The air source amplifier of the device can adjust the air inflow according to the system requirement, and ensures stable, accurate and quick response of the valve action. When the gas failure occurs, the electromagnetic valve switches the gas circuit to the gas storage tank, high-pressure gas in the gas storage tank is rapidly supplemented to the extending port of the pneumatic actuator, and the driving valve is rapidly closed, so that safety accidents possibly caused by out-of-control of the valve are effectively prevented. The air filtering and reducing device is characterized in that a first interface of the air storage tank, an external air source and an input end of the air filtering and reducing valve are connected th