Plunger type valve facilitating piston movement

Abstract

The utility model relates to the field of plunger type valves, in particular to a plunger type valve facilitating movement of a piston, and aims to solve the problems that the cylinder diameter of an air cylinder is large, the phenomena of movement jamming, jamming and the like exist in the opening and closing process, and the concentricity deviation is large after the piston is assembled due to machining tolerance, design clearance and the like. The piston rod is arranged in the cylinder body in a sliding mode, one end of the piston rod penetrates through the cylinder body, a piston is arranged at the end, located on the cylinder body, of the piston rod, the outer wall of the piston is attached to the inner wall of the cylinder body, and a sealing ring strip is embedded in the outer wall of the piston and abuts against the inner wall of the cylinder body. The piston is further provided with a balance piece so that balance of the piston can be guaranteed in the moving process. The device has the effects of reducing the installation concentricity deviation of the piston shaft and optimizing the opening and closing movement of the air cylinder.

Description

Technical Field

[0001] The present application relates to the field of plunger valves, and in particular to a plunger valve that facilitates piston movement. Background Art

[0002] Plunger valves are widely used in industries such as food and pharmaceuticals, particularly in the transportation and storage of liquids such as milk, juice, and beer. These valves typically use air and springs for opening and closing, and come in a range of sizes from small to large. Large-diameter valves (such as DN80, DN100, and DN125) are more common in practice because they handle large liquid flows. However, as the valve diameter increases, the required cylinder bore also increases, which presents numerous challenges, such as increased machining difficulty and stricter assembly precision requirements.

[0003] However, the cylinder has a large bore, and there may be movement jamming and blocking during the switching process. In addition, due to processing tolerances, design clearances and other reasons, the concentricity deviation of the piston after assembly is also large, so there is room for improvement. Utility Model Content

[0004] In order to reduce the concentricity deviation of the piston shaft installation and optimize the cylinder switch movement, the present application provides a plunger valve that facilitates piston movement.

[0005] The present application provides a plunger valve that facilitates piston movement and adopts the following technical solution:

[0006] A plunger valve that facilitates piston movement includes a cylinder body and a piston rod. The piston rod is slidably arranged in the cylinder body, one end of the piston rod passes through the cylinder body, and a piston is provided at one end of the piston rod located in the cylinder body. The outer wall of the piston is in contact with the inner wall of the cylinder body. A sealing ring is embedded in the outer wall of the piston, and the sealing ring is in contact with the inner wall of the cylinder body; a balancing piece is also provided on the piston to ensure the balance of the piston during movement.

[0007] By adopting this technical solution, the sealing ring ensures a tight seal between the piston and cylinder, effectively preventing gas leakage. Furthermore, the balancing element improves the balance and stability of the piston during movement, reducing deflection and jamming during movement, and enhancing the cylinder's overall performance. These improvements are particularly suitable for large-scale cylinders, significantly improving the smoothness of large-diameter valves during opening and closing, thereby extending the service life of the equipment.

[0008] Preferably, the balancing member is a friction ring, which is embedded in the outer wall of the piston and in contact with the inner wall of the cylinder body. The friction ring and the sealing ring strip are both coaxial with the piston.

[0009] By adopting this technical solution, the friction ring is embedded in the outer wall of the piston and abuts against the inner wall of the cylinder, effectively reducing frictional resistance during piston movement and improving the stability and smoothness of piston movement. Furthermore, the friction ring and sealing ring are both coaxial with the piston, ensuring good concentricity during piston movement and further improving the balance and stability of the piston.

[0010] Preferably, an embedded ring groove is formed on the outer wall of the piston at a position where the friction ring is embedded, and the bottom angle of the embedded ring groove is set as an arc surface.

[0011] By adopting this technical solution, the bottom angle of the inner ring groove is designed as a curved surface, which effectively reduces wear on the friction ring within the inner ring groove and extends the friction ring's service life. Furthermore, the curved surface design helps stabilize the friction ring within the inner ring groove, ensuring the balance and straightness of the piston during movement, further reducing piston jamming and blocking, and improving the operating efficiency and reliability of the entire cylinder.

[0012] Preferably, the friction ring gap is embedded in the embedded ring groove.

[0013] By adopting the above technical solution, the friction ring gap is embedded in the embedded ring groove, which can effectively reduce the friction resistance of the piston during movement, while ensuring the stability and centering of the friction ring in the embedded ring groove, thereby further improving the smoothness and reliability of the piston movement.

[0014] Preferably, the friction ring is rectangular, and the friction ring with edges is reset to the middle of the embedded ring groove under the guidance of the arc surface of the inner wall of the embedded ring groove.

[0015] By adopting the above technical solution, the friction ring is designed to be rectangular, and its edges can automatically reset to the middle of the embedded ring groove under the guidance of the curved surface of the inner wall of the embedded ring groove, thereby ensuring that the friction ring is always in the best working position, effectively avoiding the deflection of the piston during movement, improving the stability and balance of the piston movement, further reducing friction resistance, and extending the service life.

[0016] Preferably, the valve may be a multi-stage cylinder, comprising a plurality of pistons, each of which is provided with a balancing member.

[0017] By adopting the technical scheme, the multi-section cylinder structure can effectively meet the needs of large-diameter valves, and the balance piece is arranged on each piston to further improve the stability and reliability of the entire cylinder system. Specifically, the arrangement of the balance piece ensures the balance of each piston during movement, reduces the deflection and jamming phenomenon of the piston during movement, thereby optimizing the opening and closing movement of the cylinder, reducing the failure rate, and prolonging the service life. At the same time, the structure design simplifies the manufacturing process and reduces the production cost, and is particularly suitable for large-size cylinders. The larger the size and caliber, the more obvious the use effect.

[0018] Preferably, multiple balance pieces can be arranged on a single piston.

[0019] By adopting the technical scheme, the multiple balance pieces on the piston can further enhance the stability of the piston during movement, reduce the deflection of the piston shaft, and improve the concentricity between the piston and the cylinder body, thereby effectively avoiding movement jamming and jamming phenomenon, and improving the working efficiency and reliability of the cylinder. At the same time, the design of multiple balance pieces enables the piston to maintain good balance and directivity at different positions, and is suitable for application scenarios of large-size cylinders, especially large-caliber actuators, and the use effect is more significant. The structure limitation can be achieved by reducing the width of the balance piece to increase the number.

[0020] Preferably, the piston is provided with an extension ring, the outer wall of the extension ring is flush with the outer wall of the piston, and the sealing ring strip is embedded in the outer wall of the extension ring.

[0021] By adopting the technical scheme, the arrangement of the extension ring makes the installation of the sealing ring strip more convenient, while ensuring good fitting of the sealing ring strip with the inner wall of the cylinder body, improving the sealing effect, and avoiding leakage. The outer wall of the extension ring is flush with the outer wall of the piston, which ensures the overall balance and movement stability of the piston, reduces the friction resistance during movement, and further improves the service life and reliability of the piston.

[0022] In summary, the present application includes at least one of the following beneficial technical effects:

[0023] 1. The arrangement of the sealing ring strip ensures the sealing between the piston and the cylinder body, effectively preventing gas leakage. At the same time, the arrangement of the balance piece improves the balance and stability of the piston during movement, reduces the deflection and jamming phenomenon of the piston during movement, and improves the overall working performance of the cylinder. These improvements are particularly suitable for large-size cylinders, which can significantly improve the smoothness of large-diameter valves during opening and closing, and prolong the service life of the equipment.

[0024] 2. The design of the embedded ring groove and the embedded friction ring not only enhances the sealing between the piston and the cylinder body, but also ensures that the friction ring is always in the optimal working position through the guiding effect of the arc surface, further reducing friction resistance and improving the operating efficiency of the cylinder;

[0025] 3. The design of multiple balancing elements ensures excellent piston balance and guidance in different positions, making it suitable for large-scale cylinder applications, especially for actuators with larger diameters, where the effect is more significant. Structural limitations can be overcome by reducing the width of the balancing elements and increasing their number to achieve the same effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of a plunger valve that facilitates piston movement in the implementation scheme of the present application.

[0027] Figure 2 yes Figure 1 A is an enlarged schematic diagram.

[0028] Figure 3 It is a schematic structural diagram of a multi-stage cylinder in other embodiments of the present application.

[0029] Explanation of the accompanying reference numerals: 1. cylinder body; 2. piston rod; 3. piston; 31. embedded ring groove; 32. arc-shaped surface; 4. sealing ring strip; 5. friction ring; 6. extension ring. DETAILED DESCRIPTION

[0030] The following is combined with Figures 1-3 This application is described in further detail.

[0031] The embodiment of the present application discloses a plunger valve that facilitates piston movement. Figure 1 and Figure 2 The plunger valve that facilitates piston movement includes a cylinder body 1 and a piston rod 2. The piston rod 2 is slidably arranged in the cylinder body 1. One end of the piston rod 2 passes through the cylinder body 1. A piston 3 is fixed at one end of the piston rod 2 in the cylinder body 1. A sealing ring strip 4 is embedded in the outer wall of the piston 3, and the sealing ring strip 4 contacts the inner wall of the cylinder body 1; a balancing piece is also provided on the piston 3 to ensure the balance of the piston 3 during movement.

[0032] The provision of sealing ring strips 4 ensures a tight seal between piston 3 and cylinder body 1, effectively preventing gas leakage. Furthermore, the provision of balancing elements improves the balance and stability of piston 3 during movement, reducing deflection and jamming during movement, thereby enhancing the cylinder's overall performance. These improvements are particularly suitable for large-scale cylinders, significantly improving the smoothness of large-diameter valve movement during opening and closing, thereby extending the service life of the equipment.

[0033] Reference Figure 1 andFigure 2 The piston 3 is provided with an extension ring 6, which is integrally formed with the piston 3 in the embodiment, and the outer wall of the extension ring 6 is flush with the outer wall of the piston 3. When the extension ring 6 is present, the sealing ring 4 is embedded in the outer wall of the extension ring 6.

[0034] The extension ring 6 can increase the contact area between the piston 3 and the inner wall of the cylinder 1, thereby improving the sealing effect and the motion stability. The extension ring 6 is made of the same material as the piston 3 to ensure good thermal expansion matching and mechanical strength. Meanwhile, the provision of the extension ring 6 increases the overall thickness of the piston 3, thereby improving the balance.

[0035] With reference to Figure 1 and Figure 2 The balance member is a friction ring 5, the outer wall of the piston 3 is provided with an embedded ring groove 31, the bottom of the embedded ring groove 31 is provided with an arc-shaped surface 32, the friction ring 5 is embedded in the embedded ring groove 31 and is attached to the inner wall of the cylinder 1, and the friction ring 5 and the sealing ring 4 are coaxial with the piston 3; the friction ring 5 is rectangular, and the rectangular friction ring 5 with edges is guided by the arc-shaped surface 32 of the inner wall of the embedded ring groove 31 and is reset to the middle of the embedded ring groove 31.

[0036] The friction ring 5 is rectangular in design, and the edges can be guided by the arc-shaped surface 32 of the inner wall of the embedded ring groove 31 and automatically reset to the middle of the embedded ring groove 31, thereby ensuring that the friction ring 5 is always in the best working position, effectively avoiding the deflection of the piston 3 during movement, improving the stability and balance of the movement of the piston 3, further reducing the friction resistance, and prolonging the service life.

[0037] In other embodiments, with reference to Figure 3 The valve can be a multi-section cylinder, and the valve includes a plurality of pistons 3, and each piston 3 is provided with a balance member. The balance member can be provided on a single piston 3 in multiple numbers, which can further improve the balance and movement stability of the piston 3. For example, for a piston 3 with a large diameter, one friction ring 5 can be provided on each side of the piston 3 to ensure that the piston 3 does not deflect during movement. For a piston 3 with a small diameter, only one friction ring 5 can be provided on one side to simplify the structure and reduce the cost.

[0038] The implementation principle of the plunger valve facilitating the movement of the piston in the embodiment is that the provision of the friction ring 5 improves the balance and stability of the piston 3 during movement, reduces the deflection and jamming phenomenon of the piston 3 during movement, improves the perpendicularity of the axial movement of the piston 3, increases the contact area between the piston 3 and the cylinder 1, reduces the friction resistance by the provision of the friction ring 5 in the contact area, and prolongs the service life of the equipment.

[0039] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A plunger valve for facilitating piston movement, comprising a cylinder body (1) and a piston rod (2), wherein the piston rod (2) is slidably arranged in the cylinder body (1), one end of the piston rod (3) passes through the cylinder body (1), and a piston (3) is provided at one end of the piston rod (2) located in the cylinder body (1), and the outer wall of the piston (3) is in contact with the inner wall of the cylinder body (1), characterized in that: A sealing ring strip (4) is embedded in the outer wall of the piston (3), and the sealing ring strip (4) contacts the inner wall of the cylinder body (1); a balancing piece is also provided on the piston (3) to ensure the balance of the piston (3) during movement.

2. A plunger-type valve facilitating piston movement according to claim 1, characterized in that: The balancing member is a friction ring (5), which is embedded in the outer wall of the piston (3) and abuts against the inner wall of the cylinder (1). The friction ring (5) and the sealing ring strip (4) are both coaxial with the piston (3).

3. A plunger-type valve facilitating piston movement according to claim 2, characterized in that: An embedded ring groove (31) is formed at a position on the outer wall of the piston (3) where the friction ring (5) is embedded, and an arc-shaped surface (32) is provided at the bottom angle of the embedded ring groove (31).

4. A plunger-type valve facilitating piston movement according to claim 3, characterized in that: The friction ring (5) is loosely embedded in the inner ring groove (31).

5. The plunger-type valve for facilitating piston movement according to claim 4, characterized in that: The friction ring (5) is rectangular and has edges. The friction ring (5) is reset to the middle of the embedded ring groove (31) under the guidance of the arc surface (32) of the inner wall of the embedded ring groove (31).

6. The plunger-type valve for facilitating piston movement according to claim 1, characterized in that: The valve may be a multi-stage cylinder, comprising a plurality of pistons (3), each piston (3) being provided with a balancing member.

7. The plunger-type valve for facilitating piston movement according to claim 6, characterized in that: A plurality of the balancing members may be provided on a single piston (3).

8. The plunger-type valve for facilitating piston movement according to claim 1, characterized in that: An extension ring (6) is provided on the piston (3), the outer wall of the extension ring (6) is flush with the outer wall of the piston (3), and the sealing ring strip (4) is embedded in the outer wall of the extension ring (6).

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