Valve air source amplifier

Abstract

The utility model relates to a chemical and automation control technical field, concretely relates to a valve air source amplifier, including main valve body, pilot valve cover and lower valve cover, being equipped with main gas channel in main valve body, and the both ends of two lower sides of main gas channel left side are respectively communicated with air inlet and pressure release port, and the right side of main gas channel is communicated with output port, and being equipped with pilot control port on pilot valve cover, still including controlling means, and controlling means includes piston, valve rod, upper valve head and lower valve head, and valve rod sliding installation is in main valve body, and is located in main gas channel, and upper valve head fixed mounting is on valve rod upper end, and lower valve head fixed mounting is on the lower extreme of valve rod, and piston fixed mounting is on upper valve head, and the opening or plugging of main gas channel through upper valve head and lower valve head on valve rod makes high pressure gas be accelerated through the ring interval passage between main gas channel and valve rod, and the pressure relief of output port through pressure release port, thereby realizes the efficient control to gas circuit, and saves the cost.

Description

Technical Field

[0001] This utility model relates to the fields of chemical engineering and automation control technology, and in particular to a valve air source amplifier. Background Technology

[0002] Valve air source amplifiers, as a key component in industrial automation, are switching devices that precisely control large-flow airflow with small-flow airflow. Their core working principle is based on proportional control, utilizing a solenoid valve or pilot valve to receive weak control signals (typically 4-20mA electrical signals or 0.1-1.0MPa air pressure signals) to drive the main air circuit, achieving rapid on / off switching of high-pressure, high-flow gas. This technology significantly reduces the energy consumption of the control system while improving response speed, making it particularly suitable for remote control scenarios of large-diameter valves (DN300 and above) in industries such as petroleum, chemical, and power.

[0003] As the chemical industry continues to pursue automated control, the demand for efficient control of large-diameter valves in gas circuit control is increasing. Currently, gas source amplification devices mainly rely on imports, which are characterized by high prices and long delivery cycles. Utility Model Content

[0004] The purpose of this invention is to provide a valve gas source amplifier, which aims to solve the problem that as the chemical industry continues to pursue automation control, the demand for efficient control of large-diameter valves in gas circuit control is increasing. Currently, gas source amplifier devices mainly rely on imports, and imported products have the problems of high price and long delivery cycle.

[0005] 6. To achieve the above objectives, this utility model provides a valve air source amplifier, including a main valve body, a pilot valve cover, and a lower valve cover. The pilot valve cover is fixedly installed on the main valve body, and the lower valve cover is fixedly installed on the main valve body and located at the end of the main valve body away from the pilot valve cover. The main valve body is provided with a main air passage. The two lower ends on the left side of the main air passage are respectively connected to an air inlet and a pressure relief port. The right side of the main air passage is connected to an output port. The pilot valve cover is provided with a pilot control port. It also includes a control device. The control device includes a piston, a valve stem, an upper valve head, and a lower valve head. The valve stem is slidably installed in the main valve body and located in the main air passage. The upper valve head is fixedly installed on the upper end of the valve stem, and the lower valve head is fixedly installed on the lower end of the valve stem. The piston is fixedly installed on the upper valve head.

[0006] The upper sealing ring is fixedly installed on the upper valve head and is located on the side of the upper valve head near the valve stem.

[0007] The lower sealing ring is fixedly installed on the lower valve head and is located on the side of the lower valve head near the valve stem.

[0008] The two ends of the upper top spring are fixedly connected to the lower valve head and the lower valve cover, respectively.

[0009] The mounting hole penetrates through the main valve body.

[0010] This utility model discloses a valve gas source amplifier. High-pressure gas is injected into the main valve body through the air inlet. Since the upper end of the main gas passage is not closed at this time, while the lower end of the main gas passage is closed by the lower valve head, the gas is discharged from the output port through the annular channel formed by the main gas passage and the valve stem. At this time, the gas flow rate is amplified and output. Subsequently, a pressure control signal is input through the pilot control port. At this time, the piston is pushed downward and moves downward. The movement of the piston pushes the upper valve head downward and blocks the upper end of the main gas passage. At this time, the lower end of the main gas passage is opened. The pressure at the output port is greater than the pressure at the pressure relief port. At this time, the output port is connected to the pressure relief port through the main gas passage, and the pressure at the output port is relieved through the pressure relief port. This achieves efficient control of the gas path and saves costs. Attached Figure Description

[0011] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0012] Figure 1 This is a schematic diagram of the overall structure of the valve air source amplifier according to the first embodiment of this utility model.

[0013] Figure 2 This is a schematic diagram of the control device of this utility model.

[0014] In the diagram: 101-Main valve body, 102-Pilot valve cover, 103-Lower valve cover, 104-Main air passage, 105-Air inlet, 106-Pressure relief port, 107-Outlet, 108-Pilot control port, 109-Piston, 110-Valve stem, 111-Upper valve head, 112-Lower valve head, 113-Upper sealing ring, 114-Lower sealing ring, 115-Upper top spring, 116-Mounting hole. Detailed Implementation

[0015] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, but should not be construed as limiting the present invention.

[0016] The first embodiment of this application is:

[0017] Please see Figure 1 and Figure 2 ,in Figure 1 This is a schematic diagram of the overall structure of the valve air source amplifier according to the first embodiment of this utility model. Figure 2 This is a schematic diagram of the control device of this utility model.

[0018] This utility model provides a valve air source amplifier, including a main valve body 101, a pilot valve cover 102, and a lower valve cover 103, and a control device. The control device includes a piston 109, a valve stem 110, an upper valve head 111, and a lower valve head 112. The control device also includes an upper sealing ring 113 and a lower sealing ring 114. The lower valve cover 103 is provided with an upper top spring 115. The main valve body 101 is also provided with a mounting hole 116. It can be understood that the aforementioned solution solves the problem that with the continuous pursuit of automation control in the chemical industry, the demand for efficient control of large-diameter valves in air circuit control is increasing. Currently, air source amplifier devices mainly rely on imports, and imported products have the problems of high price and long delivery cycle.

[0019] In this specific embodiment, by opening or blocking the main air passage 104 through the upper valve head 111 and the lower valve head 112 on the valve stem 110, the high-pressure gas is accelerated through the annular channel between the main air passage 104 and the valve stem 110, and the pressure is released through the pressure relief port 106 to the output port 107, thereby achieving efficient control of the gas path and saving costs.

[0020] The valve stem 110 is slidably mounted within the main valve body 101 and located within the main air passage 104. The upper valve head 111 is fixedly mounted on the upper end of the valve stem 110, and the lower valve head 112 is fixedly mounted on the lower end of the valve stem 110. The piston 109 is fixedly mounted on the upper valve head 111. The pilot valve cover 102 and the lower valve cover 103 are respectively fixed to the upper and lower ends of the main valve body 101 by screws. The lower valve cover 103 also has a cavity. The piston 109 has an I-shaped columnar structure. The upper and lower sides of the valve stem 110 have disc-shaped structures. The upper valve head 111 has a hollow internal structure. The upper end of the valve stem 110... Extending into the upper valve head 111, the lower valve head 112 has a downward convex structure. Gas passes through the annular channel formed by the main air passage 104 and the valve stem 110 and is discharged through the output port 107, amplifying the gas flow rate. A pressure control signal is input through the pilot control port 108, causing the piston 109 to push the upper valve head 111 downward and block the upper end of the main air passage 104. At this time, the lower end of the main air passage 104 is opened, and the pressure at the output port 107 is greater than the pressure at the pressure relief port 106. The output port 107 then releases pressure through the pressure relief port 106, thereby achieving efficient control of the gas path and saving costs.

[0021] Secondly, the upper sealing ring 113 is fixedly installed on the upper valve head 111 and located on the side of the upper valve head 111 close to the valve stem 110. The upper sealing ring 113 is made of rubber. The upper sealing ring 113 ensures the sealing between the upper valve head 111 and the main air passage 104.

[0022] Furthermore, the lower sealing ring 114 is fixedly installed on the lower valve head 112 and located on the side of the lower valve head 112 near the valve stem 110. The lower sealing ring 114 is made of rubber. The lower sealing ring 114 ensures the sealing between the lower valve head 112 and the main air passage 104.

[0023] Furthermore, the two ends of the upper spring 115 are fixedly connected to the lower valve head 112 and the lower valve cover 103, respectively. The upper spring 115 is located below the lower valve head 112, and one end of the upper spring 115 is located in the cavity of the lower valve cover 103. Through the setting of the upper spring 115, the lower valve head 112 can abut against the lower end of the main air passage 104.

[0024] Finally, the mounting hole 116 penetrates the main valve body 101. There are two sets of mounting holes 116. The mounting holes 116 facilitate the installation and fixing of the main valve body 101 with screws.

[0025] When using a valve gas source amplifier according to this embodiment, high-pressure gas is injected into the main valve body 101 through the inlet 105. Since the upper end of the main gas passage 104 is not closed at this time, while the lower end of the main gas passage 104 is closed by the lower valve head 112, the gas is discharged through the outlet 107 through the annular channel formed by the main gas passage 104 and the valve stem 110. At this time, the gas flow rate is amplified and output. Subsequently, a pressure control signal is input through the pilot control port 108, at which time the piston 109 is subjected to... The piston 109 moves downwards, and the movement of the piston 109 pushes the upper valve head 111 downwards, blocking the upper end of the main air passage 104. At this time, the lower end of the main air passage 104 is opened, and the pressure at the output port 107 is greater than the pressure at the pressure relief port 106. At this time, the output port 107 is connected to the pressure relief port 106 through the main air passage 104, and the output port 107 is depressurized through the pressure relief port 106, thereby achieving efficient control of the air passage and saving costs.

[0026] The above-disclosed embodiments are merely one or more preferred embodiments of this application and should not be construed as limiting the scope of this application. Those skilled in the art can understand that all or part of the processes for implementing the above embodiments and equivalent changes made in accordance with the claims of this application still fall within the scope of this application.

Claims

1. A valve air source amplifier, comprising a main valve body, a pilot valve cover, and a lower valve cover, wherein the pilot valve cover is fixedly mounted on the main valve body, and the lower valve cover is fixedly mounted on the main valve body and located at the end of the main valve body away from the pilot valve cover; the main valve body has a main air passage, the two lower ends on the left side of the main air passage are respectively connected to an air inlet and a pressure relief port, the right side of the main air passage is connected to an output port, and the pilot valve cover has a pilot control port, characterized in that... It also includes control devices; The control device includes a piston, a valve stem, an upper valve head, and a lower valve head. The valve stem is slidably mounted in the main valve body and located in the main air passage. The upper valve head is fixedly mounted on the upper end of the valve stem, and the lower valve head is fixedly mounted on the lower end of the valve stem. The piston is fixedly mounted on the upper valve head.

2. The valve air source amplifier as described in claim 1, characterized in that, The control device also includes an upper sealing ring, which is fixedly installed on the upper valve head and located on the side of the upper valve head near the valve stem.

3. The valve air source amplifier as described in claim 1, characterized in that, The control device also includes a lower sealing ring, which is fixedly installed on the lower valve head and located on the side of the lower valve head near the valve stem.

4. The valve air source amplifier as described in claim 1, characterized in that, The lower valve cover is provided with an upper top spring, and the two ends of the upper top spring are fixedly connected to the lower valve head and the lower valve cover, respectively.

5. The valve air source amplifier as described in claim 1, characterized in that, The main valve body is also provided with a mounting hole, which penetrates the main valve body.

Images