Compact pneumatic large-drift-diameter valve group

Abstract

The invention provides a compact pneumatic large-drift-diameter valve bank, and belongs to the field of airflow control, the compact pneumatic large-drift-diameter valve bank comprises a valve seat and an air cylinder valve, the air cylinder valve comprises a valve body, an air cylinder mounting plate, an air cylinder, a valve body mounting plate, an air pipe connector I, an electromagnetic valve, a piston rod O-shaped ring, a sealing plate and a sealing plate O-shaped ring, the cylinder mounting plate is fixed to the top of the valve body. According to the air cylinder driving component, the connecting base, the ball head and the connecting rod are arranged and all installed at the same height, the occupied size of the air cylinder driving component is reduced, the installation space is saved, the eccentric problem between the connecting rod and the ball head is relieved through relative movement between the connecting rod and the ball head in a sleeving mode, and through relative rotation of the ball head and the connecting base, the service life of the air cylinder driving component is prolonged. Therefore, the connecting rod is prevented from affecting the position and posture of the sealing plate, and it is guaranteed that the sealing plate can be attached to the valve body mounting plate.

Description

Technical Field

[0001] The present application relates to the technical field of airflow control, and in particular to a compact pneumatic large-diameter valve group. Background Art

[0002] In the automatic control of modern factories, regulating valves play a very important role. The production of these factories depends on the correct distribution and control of flowing liquids and gases. Regulating valves are usually used to adjust the flow, pressure and liquid level of the medium. According to the signal of the regulating part, the opening of the valve is automatically controlled to achieve the regulation of the medium flow, pressure and liquid level. The opening of the regulating valve is usually controlled by an actuator. The pneumatic straight-acting valve is a valve that uses compressed air to push the pneumatic piston in the actuator. It is characterized by simple control, fast response, safety and reliability. It is often used for the opening and closing control of large-diameter and large-flow gas pipelines. Traditional pneumatic straight-acting valves use support rods to fix the cylinder above the valve body, and connect the sealing plate and the cylinder through floating joints and connecting rods. However, in actual use, after the cylinder is extended to the limit position, the piston part of the cylinder is in a suspended state. Using a floating joint is still difficult to improve the eccentricity and angle of the sealing plate relative to the piston rod, thereby affecting the position and state of the sealing plate and the use effect of the valve group. Summary of the invention

[0003] In view of this, the purpose of the present application is to provide a compact pneumatic large-diameter valve group to improve the position accuracy and stability of the sealing plate and improve the use effect.

[0004] In order to solve the above technical problems, this application provides the following technical solutions: A compact pneumatic large-diameter valve group, including a valve group consisting of a valve seat and a cylinder valve, the cylinder valve including: a valve body, a cylinder mounting plate, a cylinder, a valve body mounting plate, a duct joint 1, a solenoid valve, a piston rod O-ring, a sealing plate and a sealing plate O-ring, the valve body includes a cavity that passes through from top to bottom, the cylinder mounting plate is fixed to the top of the valve body, the cylinder is mounted at the top center of the cylinder mounting plate, the valve body mounting plate is fixedly connected to the bottom of the valve body, the end of the duct joint 1 is fixed to the side wall opening position of the valve body, the solenoid valve is fixed to the side wall of the valve body, the piston rod O-ring is arranged at the connection between the piston part of the cylinder and the cylinder mounting plate, the sealing plate is arranged inside the valve body and can slide up and down, and the sealing plate O-ring is arranged at the bottom of the sealing plate; A connecting assembly is provided between the sealing plate and the piston part of the cylinder, and the connecting assembly includes: a connecting seat, a ball head, a connecting rod, an end cover and a spring. The two connecting seats are fixedly connected to the top center of the sealing plate by bolts, the ball head is clamped on the upper inner part of the connecting seat, the connecting rod passes through the ball head, the end cover is fixed to the end of the piston part of the cylinder by bolts, and the spring is sleeved on one end of the connecting rod passing through the end cover; The valve seat includes: an air duct mounting end cover, an air duct joint 2 and a valve seat end cover, the air duct mounting end cover is connected to the end of the valve seat, the air duct joint 2 is fixedly connected to the end of the air duct mounting end cover, the valve seat end cover is connected to the other end of the valve seat, and the valve body mounting plate is fixedly connected to the top of the valve seat.

[0005] Preferably, the cylinder mounting plate comprises an opening located at the center, and a hollow protrusion is provided at the bottom of the cylinder mounting plate, and the protrusion is arranged concentrically with the cylinder mounting plate; The interior of the protruding portion includes a guide ring and a limiting ring. The guide ring is arranged at the inner center of the protruding portion, and the limiting ring is fixedly connected to the bottom of the protruding portion by bolts.

[0006] Preferably, the inner hole diameter of the protrusion is 1.2 times the inner hole diameter of the cylinder mounting plate, piston rod O-rings are provided on the top and bottom of the guide ring, and the inner hole diameter of the limit ring is the same as the inner hole diameter of the protrusion.

[0007] Preferably, a groove is formed on one side of the connection seat facing the central axis of the sealing plate, and the ball head is clamped in the groove on the side wall of the connection seat.

[0008] Preferably, the connecting rod is in an I-shape, the ball head is clamped in the middle of the connecting rod, and the inner hole diameter of the ball head is 1.2 times the diameter of the vertical part of the connecting rod.

[0009] Preferably, a groove is provided below the side wall of the connecting seat, and the diameter of the groove is 1.5 times the diameter of the horizontal part of the connecting rod.

[0010] Preferably, the outer side wall of the sealing plate is slidably matched with the inner side wall of the valve body.

[0011] Preferably, a dovetail groove is provided at the bottom of the sealing plate, and the sealing plate O-ring is clamped in the dovetail groove at the bottom of the sealing plate.

[0012] Preferably, the solenoid valve is a five-position three-way solenoid valve.

[0013] Preferably, a groove is provided at the end of the piston part of the cylinder, the connecting rod is embedded in the groove at the end of the piston part of the cylinder, and the spring is located in the groove at the end of the piston part of the cylinder.

[0014] In the present invention, a connecting seat, a ball head and a connecting rod are provided, and the connecting seat, the ball head and the connecting rod are all installed at the same height, thereby reducing the volume occupied by the cylinder driving component and saving installation space. The eccentricity problem between the connecting rod and the ball head is alleviated through the relative movement between the connecting rod and the ball head. The angle problem between the connecting rod and the sealing plate is alleviated through the relative rotation between the ball head and the connecting seat, thereby avoiding the connecting rod from affecting the position and posture of the sealing plate, and ensuring that the sealing plate can fit the valve body mounting plate.

[0015] In the present invention, by arranging the sealing plate and the valve body, the sealing plate is guided and limited by the inner wall of the valve body, which can ensure that the sealing plate moves parallel to the valve seat mounting plate to maintain the accuracy of the sealing plate position and the stability of the posture. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings, which are incorporated herein and constitute a part of the specification, illustrate embodiments of the present disclosure and, together with the description, further serve to explain the principles of the present disclosure and to enable those skilled in the relevant art to make and use the present disclosure.

[0017] Figure 1 It is a schematic diagram of the overall structure in this application; Figure 2 This is a schematic diagram of the cylinder valve structure in this application; Figure 3 This is a schematic diagram of the cross-sectional structure of the valve seat in this application; Figure 4 This is a schematic diagram of the cross-sectional structure of the cylinder valve in this application; Figure 5 For this application Figure 4 The enlarged structural diagram at A in the middle; Figure 6 This is a schematic diagram of the sealing plate structure in this application; Figure 7 It is the left view of the overall structure in this application; Figure 8 This is a schematic diagram of the valve seat structure in this application; [Reference Signs] 1. Valve seat; 101. Duct mounting end cover; 102. Duct joint 2; 103. Valve seat end cover; 2. Cylinder valve; 201. Valve body; 202. Cylinder mounting plate; 2021. Protrusion; 2022. Guide ring; 2023. Limit ring; 203. Cylinder; 204. Valve body mounting plate; 205. Duct joint 1; 206. Solenoid valve; 207. Piston rod O-ring; 208. Sealing plate; 209. Sealing plate O-ring; 3. Connecting seat; 301. Ball head; 302. Connecting rod; 303. End cover; 304. Spring. DETAILED DESCRIPTION

[0018] The following is a detailed description of a compact pneumatic large-diameter valve group provided by the present application in combination with the accompanying drawings and specific embodiments. At the same time, it is explained here that in order to make the embodiments more detailed, the following embodiments are the best and preferred embodiments, and those skilled in the art may also adopt other alternatives to implement some known technologies; and the accompanying drawings are only for a more specific description of the embodiments, and are not intended to specifically limit the present application.

[0019] like Figure 1 , Figure 2 , Figure 3 and Figure 4 A compact pneumatic large-diameter valve group is shown, and the embodiment of the present application provides a valve group consisting of a valve seat 1 and a cylinder valve 2. The cylinder valve 2 includes: a valve body 201, a cylinder mounting plate 202, a cylinder 203, a valve body mounting plate 204, an air duct connector 205, a solenoid valve 206, a piston rod O-ring 207, a sealing plate 208 and a sealing plate O-ring 209. The valve body 201 includes a cavity that runs through from top to bottom. The cylinder mounting plate 202 is fixed to the top of the valve body 201. The cylinder 203 Installed at the top center of the cylinder mounting plate 202, the valve body mounting plate 204 is fixedly connected to the bottom of the valve body 201, the end of the air duct connector 205 is fixed to the side wall opening of the valve body 201, the solenoid valve 206 is fixed to the side wall of the valve body 201, the piston rod O-ring 207 is set at the connection between the piston part of the cylinder 203 and the cylinder mounting plate 202, the sealing plate 208 is set inside the valve body 201 and can slide up and down, and the sealing plate O-ring 209 is set at the bottom of the sealing plate 208; A connecting assembly is provided between the sealing plate 208 and the piston part of the cylinder 203, and the connecting assembly includes: a connecting seat 3, a ball head 301, a connecting rod 302, an end cover 303 and a spring 304. The two connecting seats 3 are fixedly connected to the top center of the sealing plate 208 by bolts, the ball head 301 is clamped on the upper part of the inner part of the connecting seat 3, the connecting rod 302 passes through the ball head 301, the end cover 303 is fixed to the end of the piston part of the cylinder 203 by bolts, and the spring 304 is sleeved on one end of the connecting rod 302 passing through the end cover 303; The valve seat 1 comprises: an air duct mounting end cover 101, an air duct joint 2 102 and a valve seat end cover 103, the air duct mounting end cover 101 is connected to the end of the valve seat 1, the air duct joint 2 102 is fixedly connected to the end of the air duct mounting end cover 101, the valve seat end cover 103 is connected to the other end of the valve seat 1, and the valve body mounting plate 204 is fixedly connected to the top of the valve seat 1; The cylinder 203 is connected to the external pressure gas source through the solenoid valve 206, and the solenoid valve 206 is controlled by the PLC. The compressed air is controlled by the solenoid valve 206 to control the cylinder 203. A through hole is opened at the center of the valve body mounting plate 204, and the diameter of the through hole does not exceed the diameter of the sealing plate 208. The air duct connector 1 205 and the air duct connector 2 102 are used to connect the external fluid that needs to be controlled; When the cylinder 203 drives the connecting rod 302 to move linearly, in order to cope with the swing of the piston part of the cylinder 203 when it moves to the extreme position, the eccentricity problem between the connecting rod 302 and the ball head 301 is alleviated by the relative movement between the connecting rod 302 and the ball head 301, and the deflection problem between the connecting rod 302 and the sealing plate 208 is alleviated by the relative rotation of the ball head 301 and the connecting seat 3, thereby avoiding the connecting rod 302 from affecting the position and posture of the sealing plate 208, and ensuring that the sealing plate 208 can fit the valve body mounting plate 204; The connecting seat 3, the ball head 301 and the connecting rod 302 are all installed at the same height, and the connecting seat 3 is well clamped on the outside of the ball head 301, and the connecting seat 3 and the ball head 301 maintain surface contact, maintaining the pressure of the contact part between the sealing plate 208 and the valve body mounting plate 204, achieving a good sealing effect, and ensuring the use effect of the valve group.

[0020] In this embodiment, Figure 5 As shown, the cylinder mounting plate 202 includes an opening located at the center, and a hollow protrusion 2021 is provided at the bottom of the cylinder mounting plate 202, and the protrusion 2021 is concentrically arranged with the cylinder mounting plate 202; The interior of the protruding portion 2021 includes a guide ring 2022 and a limit ring 2023. The guide ring 2022 is arranged at the inner center of the protruding portion 2021, and the limit ring 2023 is fixedly connected to the bottom of the protruding portion 2021 by bolts. The protrusion 2021 has a restraining effect on the piston part of the cylinder 203, and plays a role of limiting and guiding. The guide ring 2022 uses tin bronze, which has excellent sliding performance and good corrosion resistance, and has a longer service life; The limiting ring 2023 compresses the sealing component and the guide ring 2022, and an air gap is designed between the limiting ring 2023 and the piston part of the cylinder 203 to prevent wear and generation of polluted gas; like Figure 5 As shown, the inner diameter of the protrusion 2021 is 1.2 times the inner diameter of the cylinder mounting plate 202, the top and bottom of the guide ring 2022 are both provided with a piston rod O-ring 207, and the inner diameter of the limit ring 2023 is the same as the inner diameter of the protrusion 2021; A step is designed between the inner ring of the protrusion 2021 and the inner ring of the cylinder mounting plate 202 to further limit the position of the guide ring 2022. Piston rod O-rings 207 are provided on the upper and lower sides of the guide ring 2022 to seal and prevent air leakage while blocking external pollutants from entering the cylinder 203. The piston rod O-ring 207 is compressed by the limiting ring 2023 to enhance the sealing effect of the piston rod O-ring 207.

[0021] like Figure 2 , Figure 5 and Figure 6 As shown, a groove is provided on one side of the connection seat 3 facing the central axis of the sealing plate 208, and the ball head 301 is clamped in the groove on the side wall of the connection seat 3; The groove on the side of the connection seat 3 facing the sealing plate 208 is used to limit the position of the ball head 301 to prevent the ball head 301 from being separated from the connection seat 3. The arc groove is designed to ensure the smooth rotation of the ball head 301, while ensuring the contact area and contact surface pressure, so that the sealing plate 208 can fit the valve body mounting plate 204; like Figure 4 and Figure 5 As shown, the connecting rod 302 is in the shape of an I, the ball head 301 is clamped in the middle of the connecting rod 302, and the inner hole diameter of the ball head 301 is 1.2 times the diameter of the vertical part of the connecting rod 302; The ball head 301 is clamped in the groove in the middle of the outer circumference of the connecting rod 302 to prevent it from falling off. An air gap is designed between the inner hole of the ball head 301 and the connecting rod 302, so that the ball head 301 can move linearly relative to the connecting rod 302 and can also meet the need for relative rotation.

[0022] like Figure 4 and Figure 5 As shown, a groove is provided below the side wall of the connecting seat 3, and the diameter of the groove is 1.5 times the diameter of the horizontal part of the connecting rod 302; A groove is designed at the bottom of the side wall of the connecting seat 3 to prevent the ball head 301 from getting stuck after rotating relative to the connecting seat 3, while ensuring the movable space of the connecting rod 302; like Figure 4 As shown, the outer side wall of the sealing plate 208 is slidably matched with the inner side wall of the valve body 201; The sealing plate 208 is guided and limited by the inner wall of the valve body 201, so that the sealing plate 208 can move parallel to the valve body mounting plate 204, so as to maintain the accuracy of the position of the sealing plate 208 and the stability of its posture; like Figure 4 and Figure 5 As shown, a dovetail groove is provided at the bottom of the sealing plate 208, and the sealing plate O-ring 209 is clamped in the dovetail groove at the bottom of the sealing plate 208; The sealing plate O-ring 209 plays a sealing role to improve the air tightness of the valve when it is closed. The dovetail groove design is used, and the sealing plate O-ring 209 is not easy to fall off. While improving the sealing performance, it ensures the pneumatic valve can be installed at various angles and avoids the sealing plate O-ring 209 from falling off during transportation.

[0023] like Figure 2 and Figure 7 As shown, the solenoid valve 206 is a five-position three-way solenoid valve; The solenoid valve 206 is connected to an external pressure gas source to control the movement of the cylinder and is installed on the side of the cylinder valve to save space.

[0024] like Figure 4 and Figure 5 As shown, a groove is provided at the end of the piston portion of the cylinder 203, the connecting rod 302 is embedded in the groove at the end of the piston portion of the cylinder 203, and the spring 304 is located in the groove at the end of the piston portion of the cylinder 203; The ball head 301 can also move along the central axis of the connecting rod 302 to overcome the situation where the connecting rod 302 deviates from the center of the ball head 301. The connecting rod 302 is squeezed by the spring 304, which can reduce the shaking between the connecting rod 302 and the ball head 301.

Claims

1. A compact pneumatic large-diameter valve group, comprising a valve seat (1) and a cylinder valve (2), characterized in that: The cylinder valve (2) comprises: a valve body (201), a cylinder mounting plate (202), a cylinder (203), a valve body mounting plate (204), an air duct joint (205), a solenoid valve (206), a piston rod O-ring (207), a sealing plate (208) and a sealing plate O-ring (209); the valve body (201) comprises a cavity extending vertically; the cylinder mounting plate (202) is fixed to the top of the valve body (201); the cylinder (203) is mounted at the top center of the cylinder mounting plate (202); The valve body mounting plate (204) is fixedly connected to the bottom of the valve body (201), the end of the air duct joint (205) is fixed to the side wall opening of the valve body (201), the solenoid valve (206) is fixed to the side wall of the valve body (201), the piston rod O-ring (207) is arranged at the connection between the piston part of the cylinder (203) and the cylinder mounting plate (202), the sealing plate (208) is arranged inside the valve body (201) and can slide up and down, and the sealing plate O-ring (209) is arranged at the bottom of the sealing plate (208); A connecting assembly is provided between the sealing plate (208) and the piston part of the cylinder (203), the connecting assembly comprising: a connecting seat (3), a ball head (301), a connecting rod (302), an end cover (303) and a spring (304), the two connecting seats (3) being fixedly connected to the top center of the sealing plate (208) by bolts, the ball head (301) being clamped to the upper part of the interior of the connecting seat (3), the connecting rod (302) being arranged to pass through the ball head (301), the end cover (303) being fixed to the end of the piston part of the cylinder (203) by bolts, and the spring (304) being sleeved on one end of the connecting rod (302) passing through the end cover (303); The valve seat (1) comprises: an air duct mounting end cover (101), an air duct joint (2) (102) and a valve seat end cover (103); the air duct mounting end cover (101) is connected to the end of the valve seat (1); the air duct joint (2) (102) is fixedly connected to the end of the air duct mounting end cover (101); the valve seat end cover (103) is connected to the other end of the valve seat (1); and the valve body mounting plate (204) is fixedly connected to the top of the valve seat (1).

2. The compact pneumatic large-diameter valve group according to claim 1 is characterized in that: The cylinder mounting plate (202) comprises an opening located at the center, and a hollow protrusion (2021) is provided at the bottom of the cylinder mounting plate (202), wherein the protrusion (2021) is arranged concentrically with the cylinder mounting plate (202); The interior of the protruding portion (2021) comprises a guide ring (2022) and a limit ring (2023); the guide ring (2022) is arranged at the inner center of the protruding portion (2021); and the limit ring (2023) is fixedly connected to the bottom of the protruding portion (2021) by means of bolts.

3. The compact pneumatic large-diameter valve group according to claim 2 is characterized in that: The inner hole diameter of the protrusion (2021) is 1.2 times the inner hole diameter of the cylinder mounting plate (202), the top and bottom of the guide ring (2022) are both provided with a piston rod O-ring (207), and the inner hole diameter of the limit ring (2023) is the same as the inner hole diameter of the protrusion (2021).

4. The compact pneumatic large-diameter valve group according to claim 1 is characterized in that: A groove is provided on one side of the connection seat (3) facing the central axis of the sealing plate (208), and the ball head (301) is snap-fitted into the groove on the side wall of the connection seat (3).

5. The compact pneumatic large-diameter valve group according to claim 1 is characterized in that: The connecting rod (302) is in the shape of an I-shaped letter "I", the ball head (301) is clamped in the middle of the connecting rod (302), and the inner hole diameter of the ball head (301) is 1.2 times the diameter of the vertical portion of the connecting rod (302).

6. The compact pneumatic large-diameter valve group according to claim 1 is characterized in that: A groove is provided below the side wall of the connecting seat (3), and the diameter of the groove is 1.5 times the diameter of the horizontal portion of the connecting rod (302).

7. The compact pneumatic large-diameter valve group according to claim 1 is characterized in that: The outer wall of the sealing plate (208) is slidably matched with the inner wall of the valve body (201).

8. The compact pneumatic large-diameter valve group according to claim 1 is characterized in that: A dovetail groove is provided at the bottom of the sealing plate (208), and the sealing plate O-ring (209) is clamped in the dovetail groove at the bottom of the sealing plate (208).

9. The compact pneumatic large-diameter valve group according to claim 1, characterized in that: The solenoid valve (206) is a five-position three-way solenoid valve.

10. The compact pneumatic large-diameter valve assembly according to claim 1, characterized in that: The end of the piston portion of the cylinder (203) is provided with a groove, the connecting rod (302) is embedded in the groove at the end of the piston portion of the cylinder (203), and the spring (304) is located in the groove at the end of the piston portion of the cylinder (203).

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