Pneumatic two-station throttle valve

Abstract

This invention discloses a pneumatic dual-position throttling valve, belonging to the field of valve technology, used to control the flow rate of liquids and media. The invention features a media outlet and a control port on the lower end and side of the housing, respectively, an inlet nozzle at the top of the housing, a throttling element and a valve core inside the housing, and flow channels with through holes on the inlet nozzle, throttling element, and valve core. The inlet nozzle connects to the media outlet through the flow channels, and a guide plate is provided on the valve core. Gas input through the control port drives the guide plate and valve core to rise and fall within the housing, thereby controlling the contact area between the lower end of the valve core and the throttling element, and thus controlling the flow rate at the media outlet. This allows for gas-controlled adjustment of the throttling area and flow rate or pressure without manual replacement of the throttling element, while eliminating the need for additional control and testing systems, resulting in low production costs and high reliability.

Description

Technical Field

[0001] This invention relates to the field of valve technology, and is used to control the flow of liquids and media, particularly to a pneumatic dual-position throttling valve. Background Technology

[0002] A dual-position throttle valve controls the speed of a pneumatic or hydraulic cylinder by adjusting the flow rate. The opening degree is adjusted according to the working requirements. If it is fully closed, the hydraulic or pneumatic cylinder will not move. If it is fully open, the cylinder will move at the fastest speed. Therefore, in actual use, the throttle valve is generally in a partially open state. In industry, throttling elements are widely used to adjust the flow resistance of pipelines or systems. Throttling valves are valves that control fluid flow by changing the throttling cross-section or throttling length. Existing throttling elements are classified into throttling valves and throttling coils according to their structure. Throttling valves are driven by a mechanism to move the valve disc, changing the flow path cross-sectional area to regulate flow and pressure under various operating conditions. Adjustable throttling valves have a wide adjustable range of flow and pressure in systems or pipelines and can be continuously adjusted. However, they require the use of motors or solenoid valve assemblies for adjustment, resulting in complex overall valve structure, control system, and testing system, as well as high usage and cost. Throttling coils have a simple structure and low cost, requiring no additional control system. However, their adjustment capability is limited to fixed operating conditions, and adjustments require replacing the throttling coil. In actual use, both types of throttling valves suffer from complex structures, high production costs, and high control costs. Summary of the Invention

[0003] The purpose of this invention is to provide a pneumatic dual-position throttle valve to solve the problem of high operating costs in the prior art.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is: a pneumatic dual-position throttling valve, comprising a housing, wherein a media outlet and a control port are respectively provided on the bottom and side of the housing, and an inlet connector is provided on the top of the housing. A throttling element and a valve core are provided inside the housing. Flow channels are provided on the inlet connector, the throttling element, and the valve core. The throttling element is installed on the media outlet. The upper end of the valve core extends into the flow channel of the inlet connector and is slidably connected. The lower end of the valve core contacts the throttling element. The inlet connector and the media outlet are connected through the flow channel. A guide plate is provided on the valve core. The outer edge of the guide plate is attached to and slidably connected to the housing. Gas input through the control port drives the guide plate and the valve core to rise and fall within the housing, thereby controlling the contact area between the lower end of the valve core and the throttling element.

[0005] The guide plates are multiple and are arranged circumferentially on the valve core. There is a gap between adjacent guide plates. The outer edge of each guide plate is respectively attached to and slidably connected to the inner wall of the housing. Each guide plate is provided with a groove, and the control port is connected to the groove.

[0006] The throttling device includes a base and a truncated cone. The truncated cone is mounted on the base. The flow channel through hole passes through the base and the truncated cone respectively. The base is mounted on the outlet of the ferrule. The truncated cone has a ferrule through hole on its side, which communicates with the flow channel through hole. The lower end of the valve core contacts the truncated cone.

[0007] The meson through-holes are multiple in number and are evenly distributed around the axis of the flow channel through-hole. An angle is formed between the axis of the meson through-hole and the axis of the flow channel through-hole.

[0008] A sealing ring is provided on the inner wall of the flow channel through hole on the inlet connector, and the upper end of the valve core passes through the sealing ring.

[0009] A sealing ring is provided inside the housing, and the sealing ring is located below the control port. The lower end of the valve core passes through the sealing ring.

[0010] Compared with the prior art, the present invention has the following advantages: This invention achieves gas-controlled flow rate or pressure regulation by setting a medium outlet and a control port on the bottom and side of the housing, respectively, and an inlet nozzle on the top of the housing. A throttling element and a valve core are installed inside the housing, and flow channels are provided on the inlet nozzle, throttling element, and valve core. The inlet nozzle is connected to the medium outlet through the flow channels, and a guide plate is provided on the valve core. Gas input through the control port drives the guide plate and valve core to rise and fall within the housing, thereby controlling the contact area between the lower end of the valve core and the throttling element, and thus controlling the amount of fluid at the medium outlet. This allows for gas-controlled flow rate or pressure regulation by changing the throttling area without manual replacement of the throttling element, and eliminates the need for additional control and testing systems, resulting in low production costs and high reliability. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the dual-position throttling valve of the present invention; Figure 2 This is a schematic diagram of the housing of the present invention; Figure 3 This is a schematic diagram of the inlet nozzle of the present invention; Figure 4 This is a schematic diagram of the throttling element of the present invention; Figure 5 This is a schematic diagram of the valve core of the present invention; Figure 6This is a schematic diagram showing the connection between the valve core and the guide plate of the present invention; Figure 7 This is a schematic diagram of the opening of the dual-position throttle valve of the present invention; Figure 8 This is a schematic diagram of the dual-position throttle valve closing according to the present invention.

[0012] In the diagram: 1 sealing ring, 2 housing, 3 inlet pipe nozzle, 4 valve core, 4-1 guide plate, 4-2 groove, 5 throttling element. Detailed Implementation

[0013] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0014] like Figure 1 , Figure 2 and Figure 3 As shown, a pneumatic dual-position throttle valve includes a housing 2. A media outlet and a control port are respectively provided on the bottom and side of the housing 2. An inlet connector 3 is provided on the top of the housing 2. A throttling element 5 and a valve core 4 are disposed inside the housing 2. Flow channels are provided on the inlet connector 3, the throttling element 5, and the valve core 4. The throttling element 5 is installed on the media outlet. The upper end of the valve core 4 extends into the flow channel of the inlet connector 3 and is slidably connected. The lower end of the valve core 4 contacts the throttling element 5. The inlet connector and the media outlet are connected through the flow channel. A guide plate 4-1 is provided on the valve core 4. The outer edge of the guide plate 4-1 is attached to and slidably connected to the housing 2. Gas input through the control port drives the guide plate 4-2 and the valve core 4 to rise and fall within the housing 2, thereby controlling the contact area between the lower end of the valve core 4 and the throttling element 5. In use, the control port is connected to the gas source... The system connects the inlet nozzle to the medium pipeline, and the medium outlet is connected to the equipment via a pipeline. When the control port is not supplied with control gas, the valve core 4 opens under the combined force of the medium, meaning the lower end of the valve core 4 disengages from the throttling element 5. Liquid flows into the medium outlet and is supplied to the equipment through the central flow channel through-hole of the throttling element and the medium through-holes on both sides of the throttling element 5. At this time, the flow area of ​​the throttling element 5 increases, and the valve operates under high flow conditions. When the control port is supplied with control gas, the valve core 4 moves downward, and the valve closes. That is, the lower end of the valve core 4 contacts the throttling element 5, and the liquid can only flow into the medium outlet and out through the flow channel through-holes on the valve core 4 and the throttling element 5. The flow area of ​​the throttling element 5 decreases, and the valve operates under low flow conditions. This system achieves gas control without manual replacement of the throttling element, changing the throttling area to adjust the flow or pressure. It also eliminates the need for additional control and testing systems, achieving low production costs and high reliability.

[0015] like Figure 4、 Figure 5 、 Figure 6As shown, in this embodiment, the housing 2 is rectangular, and a cylindrical flow channel through hole is provided inside the housing 2. A control port is provided on the side of the housing 2, and the air passage inside the control port communicates with the flow channel through hole. The lower end of the housing 2 is the medium outlet. In actual installation, a throttling element 5 is provided at the lower end of the housing 2. The throttling element 5 is threadedly connected to the housing 2. The throttling element 5 includes a base and a truncated cone. The truncated cone and the base are integrally formed. Flow channel through holes are provided on the base and the truncated cone respectively. The base is threadedly connected to the housing 2, and the flow channel through hole communicates with the medium outlet at the lower end of the housing 2. Multiple medium through holes are provided on the side of the flow channel through hole located on the truncated cone. The meson through holes are evenly distributed around the axis of the flow channel through hole, with each meson through hole's axis forming a 60-degree angle with the flow channel through hole's axis, for flow through the side of the truncated cone. A sealing ring 1 is installed inside the housing 2, positioned below the control port. A circumferential groove is provided on the housing 2, and the sealing ring 1 is placed within and fixedly connected to it. A valve core 4 is installed inside the housing 2, with its lower end passing through the sealing ring 1 and slidingly connected to it, contacting the truncated cone. The valve core 4 has a flow channel through hole that communicates with the flow channel through hole on the truncated cone. When the lower end of the valve core 4 contacts the truncated cone... When the flow area on the cone becomes smaller, valve 4 operates at a low flow rate. That is, the liquid flows directly from the flow channel through hole on valve core 4 into the flow channel through hole on the cone, flows through the flow channel through hole on the base, and flows out from the medium outlet at the lower end of housing 2. When valve core 4 is lifted upward and detached from the cone, a certain cavity is formed between the cone, valve core 4, and housing 2. The liquid flows out from the flow channel through hole on valve core 4 and into the cavity formed between the cone, valve core 4, and housing 2. Then it flows through the flow channel through hole and the flow channel through hole on the cone and into the flow channel through hole on the base, and flows out from the medium outlet at the lower end of housing 2. At this time, the flow area on the cone increases, and the valve works under high flow conditions; multiple guide plates 4-1 are arranged circumferentially on the valve body 4, the valve core 4 is cylindrical, the guide plates 4-1 are welded to the valve body 4, multiple guide plates 4-1 are arranged circumferentially on the valve core 4, and there is a gap between adjacent guide plates 4-1. Each guide plate 4-1 is provided with a groove 4-2, and adjacent grooves 4-2 are aligned with each other. The guide plates 4-1 are slidably connected to the housing 2. The gas input from the control port drives the guide plates 4-2 and the valve core 4 to rise and fall in the housing 2, thereby controlling the contact area between the lower end of the valve core 4 and the cone.An inlet nozzle 3 is provided at the upper end of the housing 2. The inlet nozzle 3 is threadedly connected to the housing 2. A flow channel hole is provided on the inlet nozzle 3, and a sealing ring is provided on the inner wall of the flow channel hole. The upper end of the valve core 4 passes through the sealing ring and is slidably connected. The valve core 4, the inlet nozzle 3, and the housing 2 are clearance-fitted. At this time, a certain cavity is formed between the lower end of the inlet nozzle 3 and the guide plate 4-1, and between the lower end of the valve core 4 and the inner wall of the housing 2. Gas enters the groove 4-2 from the control port and flows into the cavity formed between the lower end of the inlet nozzle 3 and the guide plate 4-1, and between the lower end of the valve core 4 and the inner wall of the housing 2 through the gap between the adjacent guide plates 4-1. This pushes the contact area between the lower end of the valve core 4 and the truncated cone, thereby adjusting the flow rate at the outlet of the medium. The throttling area can be changed and the flow rate or pressure can be adjusted without manual replacement of the throttling element. No additional control or testing system is required, achieving the purpose of low production cost and high reliability.

[0016] like Figure 7 and Figure 8As shown, during use, the control port is connected to the air source, the inlet pipe 3 is connected to the medium pipe, and the medium outlet is connected to the equipment through a pipe. When the control port is not supplied with control air, the valve core 4 remains open under the action of the medium force FJ1. In the open state, the medium flows through the inlet pipe 3, passes through the flow channel through the valve core 4, the throttling element 5, and the medium through the cone, and simultaneously flows into the flow channel through the base and out of the medium outlet. At this time, the flow area of ​​the throttling element 5 increases, and the valve operates under high flow conditions. The medium force FJ1 is equal to the effective surface AX of the medium acting on the valve core multiplied by the medium pressure P (0~12MPa). When the control port is supplied with control air, the valve core 4 moves downward under the action of the piston force FH and the resultant force FJ of the medium force (FH≥FJ2). The valve core 4 and the throttling element 5 form a metal conical sealing pair, that is, the lower end of the valve core 4 contacts the cone, and the valve closes. In the closed state, the medium flows through the inlet pipe 3, passes through the valve core 4, and the throttling element... The flow path through the conical truncated cone 5 flows into the flow path through the base and out through the outlet of the medium. This cuts off the flow area of ​​the throttling element 5 except for the central flow path, reducing the flow area of ​​the throttling element 5 and allowing the valve to operate at a low flow rate. The piston force FH is equal to the effective piston area AH multiplied by the control gas pressure PK (8~15MPa), and the medium force FJ2 is equal to the effective surface area AX of the medium acting on the valve core multiplied by the medium pressure P (0~12MPa). When the valve is closed, the product of the effective piston area AH and the control gas pressure PK (8~15MPa) is always greater than the product of the effective valve core area AX and the medium pressure P (0~12MPa). Therefore, in the venting state, the piston force FH is greater than the resultant medium force FJ2. This allows for adjustment of the flow rate at the outlet without manual replacement of the throttling element, changing the throttling area to regulate the flow rate or pressure. Furthermore, it eliminates the need for additional control and testing systems, achieving low production costs and high reliability.

[0017] This invention provides a medium outlet and a control port on the bottom and side of the housing 2, respectively, and an inlet nozzle 3 on the top of the housing 2. A throttling element 5 and a valve core 4 are installed inside the housing 2. Flow channels are provided on the inlet nozzle 3, the throttling element 5, and the valve core 4. The inlet nozzle 3 is connected to the medium outlet through the flow channels. A guide plate 4-1 is provided on the valve core 4. Gas input through the control port drives the guide plate 4-1 and the valve core 4 to rise and fall within the housing 2, thereby controlling the contact area between the lower end of the valve core 4 and the throttling element 5, and thus controlling the amount of fluid at the medium outlet. This invention achieves gas-controlled flow regulation, changing the throttling area and adjusting the flow rate or pressure without manual replacement of the throttling element. Furthermore, it eliminates the need for additional control and testing systems, resulting in low production costs and high reliability.

[0018] The above description is merely a preferred embodiment of the present invention and does not constitute any limitation on the present invention. Any simple modifications, alterations, or equivalent structural changes made to the above embodiments based on the technical essence of the present invention shall still fall within the protection scope of the present invention.

Claims

1. A pneumatic two-station throttle valve characterized in that, The device includes a housing, with a medium outlet and a control port respectively provided on the bottom and side of the housing, and an inlet connector provided on the top of the housing. A throttling element and a valve core are disposed inside the housing. The inlet connector, throttling element, and valve core are each provided with a flow channel through-hole. The throttling element is installed on the medium outlet. The upper end of the valve core extends into the flow channel through-hole of the inlet connector and is slidably connected. The lower end of the valve core contacts the throttling element. The inlet connector and the medium outlet are connected through the flow channel through-hole. A guide plate is provided on the valve core, and the outer edge of the guide plate is attached to and slidably connected to the housing. Gas input through the control port drives the guide plate and valve core to rise and fall within the housing, thereby controlling the contact area between the lower end of the valve core and the throttling element. The throttling device includes a base and a truncated cone. The truncated cone is mounted on the base. The flow channel through hole passes through the base and the truncated cone respectively. The base is mounted on the outlet of the ferrule. A ferrule through hole is provided on the side of the truncated cone. The ferrule through hole communicates with the flow channel through hole. The lower end of the valve core contacts the truncated cone. When the control port is not supplied with control air, the valve core opens under the combined force of the medium. Liquid flows into the medium outlet from the central flow channel through hole and the medium through holes on both sides of the throttling element and is supplied to the equipment. At this time, the flow area of ​​the throttling element increases, and the valve operates under high flow conditions. When the control port is supplied with control air, the valve core moves downward and the valve closes. Liquid can only flow into the medium outlet and out through the flow channel through holes on the valve core and the throttling element. The flow area of ​​the throttling element decreases, and the valve operates under low flow conditions.

2. A pneumatic two-station throttle according to claim 1, characterized in that: The guide plates are multiple and are arranged circumferentially on the valve core. There is a gap between adjacent guide plates. The outer edge of each guide plate is respectively attached to and slidably connected to the inner wall of the housing. Each guide plate is provided with a groove, and the control port is connected to the groove.

3. A pneumatic two-station throttle according to claim 2, characterized in that The valve core, inlet nozzle, and housing are fitted with a clearance. The lower end of the inlet nozzle forms a certain cavity between the guide plate, the lower end of the valve core, and the inner wall of the housing. Gas enters the groove from the control port and flows into the cavity formed between the lower end of the inlet nozzle, the guide plate, the lower end of the valve core, and the inner wall of the housing through the gap between adjacent guide plates. Gas pushes the lower end of the valve core to contact the truncated cone to adjust the flow rate at the median outlet.

4. A pneumatic two-station throttle according to claim 3, characterized in that: The meson through-holes are multiple in number and are evenly distributed around the axis of the flow channel through-hole. An angle is formed between the axis of the meson through-hole and the axis of the flow channel through-hole.

5. A pneumatic two-station throttling valve according to claim 1, characterized in that: A sealing ring is provided on the inner wall of the flow channel through hole on the inlet connector, and the upper end of the valve core passes through the sealing ring.

6. A pneumatic dual-position throttle valve according to claim 1, characterized in that: A sealing ring is provided inside the housing, and the sealing ring is located below the control port. The lower end of the valve core passes through the sealing ring.

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