PFA manual valve

Abstract

The utility model relates to the technical field of PFA hand valves, in particular to a PFA hand valve which comprises a hand valve body, and a sealing operation mechanism is arranged in the hand valve body and a valve cover. According to the manual valve, the leakage risk is reduced when the manual valve is used, the pollution problem of a traditional valve in a high-purity scene is solved, meanwhile, the annular sealing groove is designed in the contact face of the manual valve body and the diaphragm, the pressure resistance grade is remarkably improved, and due to the streamline design and the smooth flow channel surface of an internal flow channel of the manual valve body, the sealing performance is improved. The flow resistance of fluid in the manual valve body is remarkably reduced, fluid turbulence is reduced, pressure loss is reduced, the response speed is increased, the anti-skid design is arranged on the surface of the operating handle, friction force is increased, slipping during operation is prevented, the operation comfort can be improved, the operating handle and the diaphragm are connected through the high-strength corrosion-resistant piston, and the service life of the operating handle is prolonged. And the service life of the manual valve is longer.

Description

Technical Field

[0001] This utility model relates to the field of PFA manual valve technology, specifically a PFA manual valve. Background Technology

[0002] In many industries, such as chemical, electronics, and pharmaceutical, fluid media are often highly corrosive. Traditional manual valve materials are easily corroded when exposed to such media, resulting in short valve lifespans and frequent replacements. This not only increases costs but may also cause greater losses due to production stoppages during replacements. After long-term use, their sealing performance will decline due to corrosion, leading to fluid leakage. This not only wastes resources but also causes serious damage to the production environment and equipment. In order to meet market needs, a PFA manual valve is required.

[0003] Existing PFA manual valves have poor corrosion resistance, are not durable enough, and are not convenient to operate. In addition, the sealing performance of existing PFA manual valves is not good enough during use, which increases the risk of leakage when using manual valves. They cannot solve the contamination problem of traditional valves in high-purity scenarios and reduce the pressure resistance rating. Utility Model Content

[0004] The purpose of this invention is to provide a PFA manual valve to solve the problem mentioned in the background art that the sealing operation of the PFA manual valve is not good enough.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a PFA manual valve, comprising a manual valve body, an internal cavity, and nut bodies threadedly connected to both sides of the manual valve body, the nut bodies communicating with the interior of the manual valve body. An operating handle is located on the top of the manual valve body, a switch cap is mounted on the surface of the operating handle, a valve cover is located on the top surface of the manual valve body, a fixing seat is mounted inside the valve cover, a first gasket is mounted on the inner wall of the valve cover, a sealing ring for sealing is fitted onto the surface of the fixing seat, and a sealing operating mechanism is provided inside the manual valve body and the valve cover.

[0006] Preferably, a base body is provided on the surface at the bottom of the manual valve body, and a base hexagonal nut is threaded onto the surface of the base body. One end of the base hexagonal nut passes through the base body and is threadedly fastened to the surface at the bottom of the manual valve body. An anti-corrosion plug is installed on the surface at the bottom of the base body.

[0007] Preferably, the surface of the valve cover is threaded with a hexagon socket head cap, one end of the hexagon socket head cap penetrates the valve cover and is threadedly fastened to the surface of the manual valve body, and a hexagon socket head cap is threadedly fitted onto the surface of the hexagon socket head cap, which cooperates with the hexagon socket head cap. An open elastic washer is installed on the surface of the valve cover, and the open elastic washer contacts the surface of the hexagon socket head cap.

[0008] Preferably, the valve cover has a miniature quick-connect screw threaded to its surface. One end of the miniature quick-connect screw penetrates the valve cover and is fastened to the surface thread of the fixing seat. The inner wall of the miniature quick-connect screw has a vent hole that communicates with the interior of the valve cover. The surface of the nut body has a water outlet that communicates with the interior of the manual valve body. The surface of the nut body has a water inlet that communicates with the interior of the manual valve body.

[0009] Preferably, the sealing operating mechanism comprises a piston, a diaphragm, a buckle, a third gasket, a switch nut, a second gasket, and an annular sealing groove. The operating handle is equipped with a switch nut inside, and a buckle is installed on the inner wall of the operating handle. The buckle and the surface of the switch nut are engaged with each other. The valve cover is equipped with a piston inside, and the piston and the inner wall of the switch nut are threaded together. The top of the piston passes through the operating handle and is fixed to the inner wall of the switch cap.

[0010] Preferably, the valve cover has a diaphragm inside, the diaphragm is threadedly engaged with the surface of the piston, the piston is connected to the inside of the diaphragm, the diaphragm is slidably engaged with the inner wall of the fixed seat, the inner wall of the manual valve body is provided with an annular sealing groove, the annular sealing groove is tightly fitted with the surface of the diaphragm, the inner wall of the fixed seat is rotatably engaged with the surface of the piston, a third gasket is fitted on the surface of the valve cover, and a second gasket is installed on the surface at the bottom of the switch nut, the second gasket being in contact with the surface of the piston.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: This PFA manual valve not only reduces the risk of leakage during manual valve use and solves the contamination problem of traditional valves in high-purity scenarios, but also significantly improves the pressure resistance level by designing an annular sealing groove on the contact surface between the manual valve body and the diaphragm. Furthermore, the streamlined design of the internal flow channel of the manual valve body and the smooth flow channel surface significantly reduce the flow resistance of the fluid in the manual valve body, reduce fluid turbulence, reduce pressure loss, and improve response speed. The operating handle adopts an ergonomic design with a precisely calculated length, allowing the operator to easily rotate the piston to control the diaphragm with less force. The surface of the operating handle has an anti-slip design, which not only increases friction and prevents slippage during operation, but also improves the comfort of operation. The operating handle and the diaphragm are connected by a high-strength corrosion-resistant piston, which makes the service life of the manual valve longer.

[0012] With a sealing mechanism, in the open state, the user controls the switch nut by rotating the operating handle. The switch nut controls the piston, which lifts the diaphragm upward, separating it from the annular sealing groove on the surface of the manual valve body. Fluid flows through the inlet into the internal channel of the manual valve body and then exits through the outlet. In the closed state, the user controls the switch nut by rotating the operating handle. The switch nut controls the piston, locking the switch nut in place and preventing it from moving downward with the piston. When the piston lowers the diaphragm, the diaphragm is pressed tightly against the surface of the annular sealing groove on the manual valve body, forming a sealed cavity between the valve body and the diaphragm, preventing fluid from passing through. This achieves the sealing operation function of the manual valve, reducing the risk of leakage during use and solving the contamination problem of traditional valves in high-purity environments. Furthermore, the annular sealing groove designed at the contact surface between the manual valve body and the diaphragm significantly improves the pressure resistance rating. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0014] Figure 2 This is a three-dimensional exploded structural diagram of the present invention;

[0015] Figure 3 This is a schematic diagram of the main appearance structure of this utility model;

[0016] Figure 4 This is a side view of the structural appearance of this utility model;

[0017] Figure 5 This is an enlarged front cross-sectional view of the closed state of this utility model.

[0018] Figure 6 This is an enlarged front view cross-sectional diagram of the open state of this utility model.

[0019] In the diagram: 1. Manual valve body; 101. Cavity; 102. Sealing ring; 103. Fixing seat; 104. Nut body; 105. Base body; 106. Base hexagonal nut; 107. Anti-corrosion plug; 108. Socket hex bolt cap; 109. Socket hex bolt body; 110. Open elastic washer; 111. First gasket; 112. Operating handle; 113. Valve cover; 114. Miniature quick-release valve; 115. Switch cap; 116. Breathing hole; 117. Outlet; 118. Inlet; 2. Sealing operating mechanism; 21. Piston; 22. Diaphragm; 23. Snap-fit; 24. Third gasket; 25. Switch nut; 26. Second gasket; 27. Annular sealing groove. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. In addition, the terms "first", "second", "third", "upper", "lower", "left", "right", etc. are used for descriptive purposes only and should not be construed as indicating or implying relative importance. At the same time, in the description of the present utility model, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model.

[0021] The structure of a PFA manual valve provided by this utility model is as follows: Figure 1 and Figure 4As shown, the device includes a manual valve body 1, with an internal cavity 101. Nut bodies 104 are threaded onto both sides of the manual valve body 1, communicating with the interior of the manual valve body 1. A base body 105 is located at the bottom of the manual valve body 1, with hexagonal nuts 106 threaded onto its surface. One end of the hexagonal nut 106 passes through the base body 105 and is threadedly fastened to the bottom surface of the manual valve body 1. Anti-corrosion plugs 107 are installed on the bottom surface of the base body 105. An operating handle 112 is located above the manual valve body 1, with a switch cap 115 installed on its surface. A valve cover 113 is located at the top of the manual valve body 1, with a fixing seat 103 installed inside the valve cover 113. Hexagonal bolt bodies 109 are threaded onto the surface of the valve cover 113, with one end of the hexagonal bolt body 109 passing through the valve cover 113. 3. It is fastened to the surface thread of the manual valve body 1. The surface thread of the hexagonal bolt body 109 is fitted with a hexagonal bolt cap 108. The hexagonal bolt cap 108 and the hexagonal bolt body 109 cooperate with each other. The surface of the valve cover 113 is equipped with an open elastic washer 110. The open elastic washer 110 contacts the surface of the hexagonal bolt body 109. The inner wall of the valve cover 113 is equipped with a first gasket 111. The surface thread of the valve cover 113 is connected to a miniature direct fastener. Tighten 114. One end of the miniature quick-tight valve 114 passes through the valve cover 113 and is threaded onto the surface of the fixing seat 103. The inner wall of the miniature quick-tight valve 114 has a breather hole 116, which is connected to the interior of the valve cover 113. The surface of the nut body 104 has a water outlet 117, which is connected to the interior of the manual valve body 1. The surface of the nut body 104 has a water inlet 118, which is connected to the interior of the manual valve body 1.

[0022] Furthermore, such as Figure 5 and Figure 6As shown, a sealing ring 102 for sealing is fitted on the surface of the fixed seat 103. A sealing operating mechanism 2 is provided inside the manual valve body 1 and the valve cover 113. The sealing operating mechanism 2 consists of a piston 21, a diaphragm 22, a snap fastener 23, a third gasket 24, a switch nut 25, a second gasket 26, and an annular sealing groove 27. A switch nut 25 is provided inside the operating handle 112, and a snap fastener 23 is installed on the inner wall of the operating handle 112. The snap fastener 23 and the surface of the switch nut 25 are engaged with each other. A piston 21 is provided inside the valve cover 113, and the piston 21 is threadedly engaged with the inner wall of the switch nut 25. The top of the piston 21 passes through the operating handle. 112 is fixed to the inner wall of the switch cap 115. The valve cover 113 is provided with a diaphragm 22 inside. The diaphragm 22 and the surface of the piston 21 are threaded together. The piston 21 and the interior of the diaphragm 22 are connected. The diaphragm 22 and the inner wall of the fixed seat 103 are slidably engaged. The inner wall of the manual valve body 1 is provided with an annular sealing groove 27. The annular sealing groove 27 is tightly fitted to the surface of the diaphragm 22. The inner wall of the fixed seat 103 and the surface of the piston 21 are rotated together. The surface of the valve cover 113 is fitted with a third gasket 24. The surface of the switch nut 25 at the bottom position is fitted with a second gasket 26. The second gasket 26 is in contact with the surface of the piston 21.

[0023] In operation, when in the open state, the user controls the switch nut 25 by rotating the operating handle 112. The switch nut 25 controls the piston 21, which lifts the diaphragm 22 upward, separating the diaphragm 22 from the annular sealing groove 27 on the surface of the manual valve body 1. Fluid flows through the inlet 118 into the channel inside the manual valve body 1 and then exits through the outlet 117. When in the closed state, the user controls the switch nut 25 by rotating the operating handle 112. The switch nut 25 controls the piston 21, and the latch 23 locks the switch nut 25, preventing it from moving downward with the piston 21. When the piston 21 places the diaphragm 22 in the lower position, the diaphragm 22 is tightly pressed against the surface of the annular sealing groove 27 on the surface of the manual valve body 1, forming a sealed cavity between the manual valve body 1 and the diaphragm 22, preventing fluid from passing through, thus achieving the function of sealing the manual valve.

[0024] Working principle: In use, first place the manual valve body 1 in the designated position. The manual valve body 1 is made of PFA material using a one-piece molding process, which combines the corrosion resistance of PTFE with better thermoplastic processing performance, reducing the manufacturing cost of the manual valve body 1. The user assembles the nut body 104 onto the surface of the manual valve body 1. Under the combined action of the hexagonal head cap 108 and the hexagonal head cap 109, the valve cover 113 is installed on the surface of the manual valve body 1. The piston 21 and the switch nut 25 are installed through the threaded engagement between the switch nut 25 and the piston 21. The second gasket 26 enhances the sealing between the piston 21 and the switch nut 25. By rotating the base hexagonal nut 106, the base body 105 is installed at the bottom of the manual valve body 1. The anti-corrosion plug 107 improves the anti-corrosion effect of the base body 105. After the user installs the fixing seat 103 on the inner wall of the valve cover 113, the micro quick-release screwdriver 114 is tightened. The micro quick-release screwdriver 114 installs the fixing seat 103 inside the valve cover 113. The gas inside the valve cover 113 is discharged by the breather hole 116 on the inner wall of the micro quick-release screwdriver 114.

[0025] When in the open state, the user controls the switch nut 25 by rotating the operating handle 112. The switch nut 25 controls the piston 21, which lifts the diaphragm 22 upward. The diaphragm 22 separates from the annular sealing groove 27 on the surface of the manual valve body 1. Fluid flows into the channel inside the manual valve body 1 through the inlet 118 and then exits through the outlet 117. When in the closed state, the user controls the switch nut 25 by rotating the operating handle 112. The switch nut 25 controls the piston 21. The latch 23 locks the switch nut 25, preventing it from moving downward with the piston 21. When the piston 21 places the diaphragm 22 in the lower position, the diaphragm 22 is tightly pressed against the surface of the annular sealing groove 27 on the surface of the manual valve body 1, forming a sealed cavity between the manual valve body 1 and the diaphragm 22, preventing fluid from passing through. The operating handle 112 is ergonomically designed with a precisely calculated length, allowing operators to easily rotate the piston 21 to control the diaphragm 22 with minimal force. The surface of the operating handle 112 has an anti-slip design, increasing friction to prevent slippage and improving operational comfort. The operating handle 112 and diaphragm 22 are connected by a high-strength, corrosion-resistant piston 21, extending the service life of the manual valve and enabling its sealing operation. This reduces the risk of leakage and solves the contamination problem of traditional valves in high-purity environments. Furthermore, an annular sealing groove 27 is designed at the contact surface between the manual valve body 1 and the diaphragm 22, significantly improving the pressure resistance. The streamlined design and smooth surface of the internal flow channel of the manual valve body 1 significantly reduce the flow resistance within the valve body, minimizing turbulence, reducing pressure loss, and improving response speed, ultimately enabling the PFA manual valve to function properly.

[0026] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A PFA manual valve, comprising a manual valve body (1), characterized in that: The manual valve body (1) has a cavity (101) inside. Nut bodies (104) are threadedly connected to both sides of the manual valve body (1). The nut bodies (104) are connected to the inside of the manual valve body (1). An operating handle (112) is provided on the top of the manual valve body (1). A switch cap (115) is installed on the surface of the operating handle (112). A valve cover (113) is provided on the surface of the top position of the manual valve body (1). A fixing seat (103) is installed inside the valve cover (113). A first gasket (111) is installed on the inner wall of the valve cover (113). A sealing ring (102) for sealing is fitted on the surface of the fixing seat (103). A sealing operating mechanism (2) is provided inside the manual valve body (1) and the valve cover (113).

2. A PFA manual valve according to claim 1, characterized in that: The bottom surface of the manual valve body (1) is provided with a base body (105), and the surface of the base body (105) is threaded with a base hexagonal nut (106). One end of the base hexagonal nut (106) passes through the base body (105) and is threadedly fastened to the bottom surface of the manual valve body (1). The bottom surface of the base body (105) is provided with an anti-corrosion plug (107).

3. A PFA manual valve according to claim 1, characterized in that: The valve cover (113) is threaded with a hexagonal bolt body (109) on its surface. One end of the hexagonal bolt body (109) passes through the valve cover (113) and is threadedly fastened to the surface of the manual valve body (1). The hexagonal bolt body (109) is threaded with a hexagonal bolt cap (108). The hexagonal bolt cap (108) and the hexagonal bolt body (109) cooperate with each other. The valve cover (113) is equipped with an open elastic washer (110) on its surface. The open elastic washer (110) is in contact with the surface of the hexagonal bolt body (109).

4. A PFA manual valve according to claim 1, characterized in that: The valve cover (113) is threaded with a miniature quick-connect screwdriver (114). One end of the miniature quick-connect screwdriver (114) passes through the valve cover (113) and is threadedly fastened to the surface of the fixing seat (103). The inner wall of the miniature quick-connect screwdriver (114) is provided with a breather hole (116). The breather hole (116) is connected to the interior of the valve cover (113). The surface of the nut body (104) is provided with a water outlet (117). The water outlet (117) is connected to the interior of the manual valve body (1). The surface of the nut body (104) is provided with a water inlet (118). The water inlet (118) is connected to the interior of the manual valve body (1).

5. A PFA manual valve according to claim 1, characterized in that: The sealing operation mechanism (2) is composed of a piston (21), a diaphragm (22), a buckle (23), a third gasket (24), a switch nut (25), a second gasket (26), and an annular sealing groove (27). The switch nut (25) is provided inside the operating handle (112). The buckle (23) is installed on the inner wall of the operating handle (112). The buckle (23) and the surface of the switch nut (25) are engaged with each other. The piston (21) is provided inside the valve cover (113). The piston (21) and the inner wall of the switch nut (25) are threaded together. The top of the piston (21) passes through the operating handle (112) and is fixed to the inner wall of the switch cap (115).

6. A PFA manual valve according to claim 5, characterized in that: The valve cover (113) is provided with a diaphragm (22) inside. The diaphragm (22) and the surface of the piston (21) are threaded together. The piston (21) and the interior of the diaphragm (22) are connected. The diaphragm (22) and the inner wall of the fixed seat (103) are slidably engaged. The inner wall of the manual valve body (1) is provided with an annular sealing groove (27). The annular sealing groove (27) and the surface of the diaphragm (22) are tightly fitted. The inner wall of the fixed seat (103) and the surface of the piston (21) are rotated together. The surface of the valve cover (113) is fitted with a third gasket (24). The surface of the switch nut (25) at the bottom position is fitted with a second gasket (26). The second gasket (26) is in contact with the surface of the piston (21).

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