Large-diameter anti-seizure diaphragm valve

Abstract

The utility model relates to the technical field of valves, and particularly discloses a large-caliber anti-seizure diaphragm valve which comprises a control assembly, a transmission assembly and a valve body assembly, the control assembly is located above the transmission assembly, and the transmission assembly is located on the inner side of the valve body assembly; the control assembly comprises a hand wheel and a screw, the screw is arranged on one side of the hand wheel, and the hand wheel is fixedly connected to the transmission assembly through the screw. The transmission assembly comprises a valve rod, a gasket, a spring, a piston, a pressing ring, a diaphragm, a valve clack, a valve element, a bolt, a steel ball, a check ring, a first O-shaped ring, a bearing and a second O-shaped ring. The steel ball is rotationally connected between the valve rod and the piston. The spring is fixedly connected between the gasket and the pressing ring, the pressing ring is fixedly connected to the piston, and the diaphragm is fixedly connected below the pressing ring and the piston. According to the utility model, the seizure phenomenon between the valve rod and the piston can be prevented, the valve structures are tightly matched, the sealing performance is strong, medium pollution can be prevented, the service life of the valve is prolonged, and the cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, and particularly relates to a large-diameter anti-seizing diaphragm valve. Background Art

[0002] A diaphragm valve is a special diaphragm valve used to control the flow direction and speed of a medium, and has the characteristics of self-sealing and self-regulation. It can be used as a one-way check valve under different pressures, allowing fluid to pass freely under positive pressure difference and preventing backflow under negative pressure difference. Diaphragm valves are widely used in industries that require high-purity gases, such as semiconductor production.

[0003] Currently, the following areas for improvement still exist in the prior art: During the use of the valve, if the connection part of the valve is not properly designed or there is medium pollution inside the valve, the connection part may seize and the valve may fail, resulting in a shortened service life of the valve and an increased cost. Summary of the Utility Model

[0004] To solve the above problems existing in the prior art, the utility model provides a large-diameter anti-seizing diaphragm valve, which can prevent seizing between the valve stem and the piston, the valve structure is closely matched, has strong sealing performance, can prevent medium pollution, increase the service life of the valve, and reduce costs.

[0005] The purpose of the utility model can be achieved by the following technical solutions:

[0006] A large-diameter anti-seizing diaphragm valve includes a control assembly, a transmission assembly, and a valve body assembly. The control assembly is located above the transmission assembly, and the transmission assembly is located inside the valve body assembly;

[0007] The control assembly includes a handwheel and a screw. The screw is arranged on one side of the handwheel, and the handwheel is fixedly connected to the transmission assembly through the screw;

[0008] The transmission assembly includes a valve stem, a gasket, a spring, a piston, a pressure ring, a diaphragm, a valve flap, a valve core, a bolt, a steel ball, a retaining ring, a first O-ring, a bearing, and a second O-ring. The steel ball is rotatably connected between the valve stem and the piston. The spring is fixedly connected between the gasket and the pressure ring. The pressure ring is fixedly connected to the piston. The diaphragm is fixedly connected below the pressure ring and the piston;

[0009] The valve body assembly includes a valve cap and a valve body. The valve cap is fixedly connected to the inside of the valve body. The second O-ring is fixedly connected between the pressure ring and the valve body.

[0010] Preferably, the valve flap is arranged in a T shape, an opening is provided below the piston, the opening of the piston matches the vertical section of the T shape of the valve flap, and the valve flap is fixedly connected below the piston.

[0011] Preferably, an opening is provided in the horizontal section of the T shape of the valve flap, and the bolt is fixedly connected to the opening in the horizontal section of the T shape of the valve flap.

[0012] Preferably, the valve core is fixedly connected below the horizontal section of the T shape of the valve flap.

[0013] Preferably, the piston is provided with a groove, the groove of the piston matches the first O-ring, and the first O-ring is fixedly connected to the groove of the piston.

[0014] Preferably, the bearing is fixedly connected between the valve cap and the pressure ring.

[0015] Preferably, the gasket is fixedly connected between the valve cap and the piston.

[0016] Preferably, the retaining ring is fixedly connected to the gasket.

[0017] The beneficial effects of the present utility model are as follows:

[0018] (1) By providing a control component and a transmission component, the technical effect that can be achieved is that the steel ball is rotatably connected between the valve stem and the piston, making the connection between the valve stem and the piston a flexible connection, preventing the phenomenon of jamming between the valve stem and the piston, increasing the service life of the valve, reducing costs, the groove of the piston matches the first O-ring, and the first O-ring is fixedly connected to the groove of the piston, making the cooperation between the pressure ring and the piston closer, improving the airtightness of the valve, and preventing medium pollution.

[0019] (2) By providing a valve body component, the technical effect that can be achieved is that the valve cap and the valve body are closely matched, improving the airtightness of the valve, the second O-ring is fixedly connected between the pressure ring and the valve body, making the cooperation between the pressure ring and the valve body closer, improving the airtightness of the valve, and preventing medium pollution. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] For the convenience of those skilled in the art to understand, the present utility model will be further described below with reference to the accompanying drawings.

[0021] Figure 1 is the overall structural schematic diagram of the present utility model;

[0022] Figure 2 is for the Figure 1 enlarged view of part A in the present utility model;

[0023] Figure 3 is for the Figure 1Enlarged view at position B in [country specific context, if applicable];

[0024] Description of main component symbols:

[0025] In the figure: 1. Valve body; 2. Handwheel; 3. Valve cap; 4. Valve stem; 5. Gasket; 6. Spring; 7. Piston; 8. Pressure ring; 9. Diaphragm; 10. Valve flap; 11. Valve core; 12. Bolt; 13. Screw; 14. Steel ball; 15. Retaining ring; 16. First O-ring; 17. Bearing; 18. Second O-ring. Specific implementation manners

[0026] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application; obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0027] In the description of the present application, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", "top / bottom end", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present application. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0028] In the description of the present application, it should be noted that unless otherwise clearly defined and limited, the terms "installed", "provided with", "sheathed / connected", "connected", etc. should be understood in a broad sense. For example, "connected" 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 directly connected or indirectly connected through an intermediate medium, and can be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0029] Referring to Figures 1 to 3 , a large-diameter anti-seize diaphragm valve disclosed by the present utility model is characterized in that it includes a control assembly, a transmission assembly, and a valve body assembly. The control assembly is located above the transmission assembly, and the transmission assembly is located inside the valve body assembly;

[0030] The control assembly includes a handwheel 2 and a screw 13. The screw 13 is arranged on one side of the handwheel 2, and the handwheel 2 is fixedly connected to the transmission assembly through the screw 13;

[0031] The transmission assembly includes a valve stem 4, a gasket 5, a spring 6, a piston 7, a pressure ring 8, a diaphragm 9, a valve flap 10, a valve core 11, a bolt 12, a steel ball 14, a retaining ring 15, a first O-ring 16, a bearing 17 and a second O-ring 18. The steel ball 14 is rotatably connected between the valve stem 4 and the piston 7, making the connection between the valve stem 4 and the piston 7 a flexible connection, preventing jamming between the valve stem 4 and the piston 7, increasing the service life of the valve and reducing costs. The spring 6 is fixedly connected between the gasket 5 and the pressure ring 8. The pressure ring 8 is fixedly connected to the piston 7. The diaphragm 9 is fixedly connected below the pressure ring 8 and the piston 7;

[0032] The valve body assembly includes a valve cap 3 and a valve body 1. The valve cap 3 is fixedly connected to the inside of the valve body 1. The valve cap 3 and the valve body 1 are closely fitted, improving the airtightness of the valve. The second O-ring 18 is fixedly connected between the pressure ring 8 and the valve body 1, making the fit between the pressure ring 8 and the valve body 1 closer, improving the airtightness of the valve and preventing medium pollution.

[0033] Refer to Figure 1 and Figure 3 , the valve flap 10 is arranged in a T shape. There is an opening below the piston 7. The opening of the piston 7 matches the vertical section of the T shape of the valve flap 10. The valve flap 10 is fixedly connected below the piston 7; there is an opening in the horizontal section of the T shape of the valve flap 10. The bolt 12 is fixedly connected to the opening in the horizontal section of the T shape of the valve flap 10; the valve core 11 is fixedly connected below the horizontal section of the T shape of the valve flap 10.

[0034] Refer to Figure 1 , the piston 7 is provided with a groove. The groove of the piston 7 matches the first O-ring 16. The first O-ring 16 is fixedly connected to the groove of the piston 7, making the fit between the pressure ring 8 and the piston 7 closer, improving the airtightness of the valve and preventing medium pollution; the bearing 17 is fixedly connected between the valve cap 3 and the pressure ring 8; the gasket 5 is fixedly connected between the valve cap 3 and the piston 7; the retaining ring 15 is fixedly connected to the gasket 5.

[0035] The working principle and usage process of the present utility model: Rotate the control handwheel 2 to drive the valve stem 4 to press down. The valve stem 4 drives the piston 7 to press down. The steel ball 14 is rotatably connected between the valve stem 4 and the piston 7, making the connection between the valve stem 4 and the piston 7 a flexible connection, preventing jamming between the valve stem 4 and the piston 7. When the piston 7 presses down, the spring 6 is stretched to assist the piston 7 to continue pressing down, causing the diaphragm 9 to deform and driving the valve flap 10, the valve core 11 and the valve core screw 12 to press down to a suitable position, thereby controlling the fluid flow or preventing the fluid from passing through.

[0036] The above are only the preferred embodiments of the present utility model and do not impose any formal restrictions on the present utility model. Although the present utility model has been disclosed above with the preferred embodiments, it is not intended to limit the present utility model. Any person skilled in the art can make some changes or modifications to equivalent embodiments with equivalent changes within the scope of the technical solution of the present utility model by using the above-disclosed technical content. However, as long as it does not depart from the content of the technical solution of the present utility model, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present utility model still fall within the scope of the technical solution of the present utility model.

Claims

1. A large-diameter anti-seize diaphragm valve, characterized in that: It includes a control component, a transmission component and a valve body component. The control component is located above the transmission component, and the transmission component is located inside the valve body component. The control component includes a handwheel (2) and a screw (13). The screw (13) is arranged on one side of the handwheel (2), and the handwheel (2) is fixedly connected to the transmission component through the screw (13). The transmission component includes a valve stem (4), a gasket (5), a spring (6), a piston (7), a compression ring (8), a diaphragm (9), a valve flap (10), a valve core (11), a bolt (12), a steel ball (14), a retaining ring (15), a first O-ring (16), a bearing (17) and a second O-ring (18). The steel ball (14) is rotatably connected between the valve stem (4) and the piston (7). The spring (6) is fixedly connected between the gasket (5) and the compression ring (8). The compression ring (8) is fixedly connected to the piston (7). The diaphragm (9) is fixedly connected below the compression ring (8) and the piston (7). The valve body component includes a valve cap (3) and a valve body (1). The valve cap (3) is fixedly connected inside the valve body (1). The second O-ring (18) is fixedly connected between the compression ring (8) and the valve body (1).

2. The large-diameter anti-seizing diaphragm valve according to claim 1, wherein: The valve flap (10) is arranged in a T shape. An opening is provided below the piston (7). The opening of the piston (7) matches the vertical section of the T shape of the valve flap (10). The valve flap (10) is fixedly connected below the piston (7).

3. The large-diameter anti-seize diaphragm valve according to claim 2, wherein: An opening is provided in the horizontal section of the T shape of the valve flap (10). The bolt (12) is fixedly connected at the opening of the horizontal section of the T shape of the valve flap (10).

4. The large-caliber anti-seizing diaphragm valve according to claim 2, characterized in that: The valve core (11) is fixedly connected below the horizontal section of the T shape of the valve flap (10).

5. The large-caliber anti-seize diaphragm valve according to claim 1, characterized in that: The piston (7) is provided with a groove. The groove of the piston (7) matches the first O-ring (16). The first O-ring (16) is fixedly connected at the groove of the piston (7).

6. A large-caliber anti-seize diaphragm valve according to claim 1, characterized in that: The bearing (17) is fixedly connected between the valve cap (3) and the compression ring (8).

7. The large-diameter anti-seizing diaphragm valve according to claim 1, wherein: The gasket (5) is fixedly connected between the valve cap (3) and the piston (7).

8. The large-diameter anti-seize diaphragm valve according to claim 1, wherein: The retaining ring (15) is fixedly connected to the gasket (5).

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