Pneumatic diaphragm valve

Abstract

The pneumatic diaphragm valve comprises a hollow valve body, the middle side of the valve body is communicated with an air pipe connector, the lower end of the valve body is fixedly communicated with an upper end cover, the lower side of the upper end cover is movably connected with a lower end cover, a base plate is arranged between the upper end cover and the lower end cover, the lower side of the base plate is fixedly connected with a blocking plate, and the lower end cover is provided with a three-way groove. The front side and the rear side of the lower end cover fixedly communicate with connecting pipes, and the upper side of the middle of the base plate is fixedly connected with a pressurizing component. According to the utility model, the problems of complex structure, easy damage and poor leakproofness of the existing device are effectively solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of pneumatic diaphragm valves and relates to a pneumatic diaphragm valve. Background Art

[0002] A diaphragm valve is a stop valve that uses a diaphragm as an opening and closing member to close a flow channel, cut off a fluid, and separate a valve body cavity from a valve cover cavity; Chinese patent CN215928478U discloses a pneumatic diaphragm valve, comprising a valve body, a valve cover arranged on the valve body, a valve stem installed on the valve cover, a diaphragm arranged between the valve cover and the valve body, and a pneumatic actuator for driving the valve stem to move, wherein a first connecting member is fixedly arranged on the diaphragm, a docking assembly is arranged between the first connecting member and the valve stem, a docking block surrounding the first connecting member is arranged on the diaphragm, a valve core is arranged between the valve stem and the docking block, the valve core and the docking block are limited and fixed by both the valve stem and the diaphragm, a second connecting member is fixedly arranged on the diaphragm, and the second connecting member cooperates with the valve core and the docking block to realize linkage with the valve stem; however, this technical solution has the problems of complex structure, easy damage, and poor airtightness. Utility Model Content

[0003] In view of the above problems, the utility model proposes a pneumatic diaphragm valve, which effectively solves the problems of complex structure, easy damage and poor airtightness in the existing devices in the prior art.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0005] A pneumatic diaphragm valve comprises a hollow valve body, the middle side of the valve body is connected to an air pipe joint, the lower end of the valve body is fixedly connected to an upper end cover, the lower side of the upper end cover is detachably connected to the lower end cover, a padding plate sealingly contacting the upper end cover is arranged between the upper end cover and the lower end cover, a sealing plate sealingly contacting the lower end cover is fixedly connected to the lower side of the padding plate, the lower end cover is provided with a three-way groove, a partition plate is fixedly connected to the middle part of the three-way groove, the partition plate can be in sealing contact with the sealing plate so that the two ends of the three-way groove are disconnected, the front and rear sides of the lower end cover are fixedly connected to connecting pipes, the upper middle side of the padding plate is fixedly connected to a pressurizing component located in the valve body, which is used to fit the sealing plate to the partition plate position, the pressurizing component is in sealing contact with the inner wall of the valve body and can be displaced up and down along the valve body, and the air pipe joint is located above the pressurizing component.

[0006] Preferably, the pressure-applying component includes an elastic plate fixedly connected to the upper side surface in the middle of the top of the pad, a movable plate fixedly connected to the upper side of the elastic plate, an adjusting rod fixedly connected to the upper side of the movable plate, a conical cylinder fixedly connected to the upper side of the adjusting rod, a slide groove is opened on the inner side of the valve body, the conical cylinder is plugged into the slide groove, the conical cylinder is in sealing contact with the slide groove and can move up and down along the slide groove, the conical cylinder is plugged into the slide groove, a conical spring is fixedly connected to the upper end of the conical cylinder, the upper end of the conical spring is fixedly connected to the upper end of the inner wall of the valve body, and the conical spring is sleeved on the outside of the adjusting rod.

[0007] Preferably, an auxiliary tube is fixedly connected to the lower inner part of the valve body, an opening hole is opened in the middle of the auxiliary tube, the adjustment rod is inserted into the opening hole, and can slide freely along the upper and lower sides of the opening hole.

[0008] Preferably, a plurality of assembly grooves are provided on the outer sides of the upper end cover, the lower end cover and the backing plate, and the backing plate, the upper end cover and the lower end cover are assembled in cooperation with each other through locking bolts and nuts.

[0009] Preferably, the pad is made of rubber.

[0010] Preferably, a sealing cover is threadedly connected to the upper end of the valve body, the upper end of the regulating rod is located inside the sealing cover, and the upper side of the regulating rod is plugged into the valve body.

[0011] Compared with the prior art, the utility model has the following beneficial effects:

[0012] 1. By turning on the external air supply equipment, the air pressure on the upper part of the valve body increases, driving the pressurized component to move downward. The pressurized component drives the sealing plate connected to the gasket to move closer to the partition plate, so that the sealing plate is attached to the partition plate to block the flow of liquid in the pipeline, which has a better sealing effect.

[0013] 2. Pass the locking bolts through the assembly grooves of the upper end cover, lower end cover and gasket, and then fix the locking bolts in place on the upper end cover, lower end cover and gasket with nuts. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the axonometric structure of the utility model.

[0015] Figure 2 It is a partial cross-sectional view of the valve body of the utility model.

[0016] Figure 3 It is a schematic diagram of the elastic plate structure of the utility model.

[0017] Figure 4 This is a schematic diagram of the sealing plate structure of the utility model.

[0018] Figure 5 This is a schematic diagram of the partition board structure of the utility model.

[0019] In the figure: 1, valve body; 2, adjusting rod; 3, sealing cover; 4, lower end cover; 5, connecting pipe; 6, air pipe joint; 7, locking bolt; 9, slide groove; 10, conical spring; 11, conical cylinder; 12, auxiliary cylinder; 13, moving plate; 14, elastic plate; 15, pad; 16, blocking plate; 17, partition plate; 18, three-way groove DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] See also Figure 1-5 The utility model provides a technical solution: a pneumatic diaphragm valve, comprising a hollow valve body 1, a trachea joint 6 is connected to the middle side of the valve body 1, an upper end cover 3 is fixedly connected to the lower end cover 4 at the lower end of the valve body 1, a gasket 15 in sealing contact with the upper end cover 3 and the lower end cover 4 is detachably connected, a gasket 15 in sealing contact with the upper end cover 3 is arranged between the upper end cover 3 and the lower end cover 4, a sealing plate 16 in sealing contact with the lower end cover 4 is fixedly connected to the lower side of the gasket 15, and a three-way groove 18 is opened in the lower end cover 4, and the three-way groove 18 is connected to the lower end cover 4. 8 is fixedly connected with a partition plate 17 in the middle, and the partition plate 17 can be in sealing contact with the sealing plate 16 to disconnect the two ends of the three-way groove 18, and the front and rear sides of the lower end cover 4 are fixedly connected with connecting pipes 5, and the upper side of the middle part of the gasket 15 is fixedly connected with a pressurizing component located in the valve body, which is used to fit the sealing plate 16 to the position of the partition plate 17, and the pressurizing component is in sealing contact with the inner wall of the valve body 1 and can move up and down along the valve body 1, and the air pipe joint 6 is located above the pressurizing component.

[0022] When the utility model is in use, the connecting pipe 5 is connected to the pipeline, and the air pipe joint 6 is connected to the external air supply equipment. When it is necessary to close the position of one side of the pipeline, the external air supply equipment is turned on. At this time, the air pressure on the upper part of the valve body 1 becomes larger, driving the pressurizing component to move downward, and the pressurizing component drives the sealing plate 16 connected to the pad 15 to move to a position close to the partition plate 17, so that the sealing plate 16 is attached to the position of the partition plate 17 to block the circulation of the liquid in the pipeline, and has a better sealing effect. The upper end cover 3 and the lower end cover 4 are connected by bolts and nuts.

[0023] The pressurizing component includes an elastic plate 14 fixedly connected to the upper side surface in the middle of the top of the pad 15, a movable plate 13 fixedly connected to the upper side of the elastic plate 14, an adjusting rod 2 fixedly connected to the upper side of the movable plate 13, a conical cylinder 11 fixedly connected to the upper side of the adjusting rod 2, a slide groove 9 is opened on the inner side of the valve body 1, the conical cylinder 11 is plugged into the slide groove 9, the conical cylinder 11 is in sealing contact with the slide groove and can move up and down along the slide groove 9, a conical spring 10 is fixedly connected to the upper end of the conical cylinder 11, the upper end of the conical spring 10 is fixedly connected to the upper end of the inner wall of the valve body 1, and the conical spring 10 is sleeved on the outer side of the adjusting rod 2.

[0024] Turn on the external air supply device, and pressurize the upper side of the valve body 1 through the air pipe joint 6, so as to drive the conical cylinder 11 to move downward, the conical cylinder 11 drives the adjusting rod 2 to move downward, the adjusting rod 2 drives the elastic plate 14 to move downward, and the elastic plate 14 drives the sealing plate 16 connected to the pad 15 to move downward, so that the sealing plate 16 fits the upper side of the partition plate 17.

[0025] An auxiliary tube 12 is fixedly connected to the lower inner part of the valve body 1. An opening hole is opened in the middle of the auxiliary tube 12. The regulating rod 2 is inserted into the opening hole and can slide freely along the upper and lower sides of the opening hole.

[0026] The auxiliary cylinder 12 assists the adjusting rod 2 to freely move up and down, thereby improving the working stability of the adjusting rod 2 in the valve body 1 .

[0027] The upper end cover 3, the lower end cover 4 and the backing plate 15 are all provided with a plurality of assembly grooves on their outer sides. The backing plate 15, the upper end cover 3 and the lower end cover 4 are assembled together by means of locking bolts 7 and nuts.

[0028] The locking bolt 7 is passed through the assembly grooves of the upper end cover 3, the lower end cover 4 and the gasket 15, and then the locking bolt 7 is fixed in position on the upper end cover 3, the lower end cover 4 and the gasket 15 by a nut.

[0029] The pad 15 is made of rubber.

[0030] The upper end of the valve body 1 is threadedly connected with a sealing cover 3 , the upper end of the regulating rod 2 is located inside the sealing cover 3 , and the upper side of the regulating rod 2 is plugged into the valve body 1 .

[0031] The sealing cover 3 plays a sealing role.

[0032] When the utility model is in use, firstly, the connecting pipe 5 is connected to the pipeline, and the air pipe joint 6 is connected to the external air supply equipment. When it is necessary to close the position of one side of the pipeline, the external air supply equipment is turned on. At this time, the air pressure on the upper part of the valve body 1 becomes larger, driving the pressurizing component to move downward, and the pressurizing component drives the sealing plate 16 connected to the pad 15 to move to a position close to the partition plate 17, so that the sealing plate 16 is attached to the position of the partition plate 17 to block the flow of liquid in the pipeline.

[0033] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A pneumatic diaphragm valve, characterized in that: The closure of the valve body is provided with a plurality of closure members, each of which is adapted to engage with the closure member and the closure member. The closure member is adapted to engage with the closure member and the closure member. The closure member is adapted to engage with the closure member and the closure member. The closure member is adapted to engage with the closure member and the closure member.

2. The pneumatic diaphragm valve according to claim 1, characterized in that: The pressurizing component includes an elastic plate fixedly connected to the upper side surface in the middle of the top of the pad, a movable plate fixedly connected to the upper side of the elastic plate, an adjusting rod fixedly connected to the upper side of the movable plate, a conical cylinder fixedly connected to the upper side of the adjusting rod, a slide groove is opened on the inner side of the valve body, the conical cylinder is plugged into the slide groove, the conical cylinder is in sealing contact with the slide groove and can move up and down along the slide groove, a conical spring is fixedly connected to the upper end of the conical cylinder, the upper end of the conical spring is fixedly connected to the upper end of the inner wall of the valve body, and the conical spring is sleeved on the outside of the adjusting rod.

3. The pneumatic diaphragm valve according to claim 2, characterized in that: An auxiliary cylinder is fixedly connected to the lower inner side of the valve body, an opening hole is opened in the middle side of the auxiliary cylinder, the regulating rod is inserted into the opening hole, and can slide freely along the upper and lower sides of the opening hole.

4. The pneumatic diaphragm valve according to claim 3, characterized in that: The upper end cover, the lower end cover and the outer side of the backing plate are all provided with a plurality of assembly grooves, and the backing plate, the upper end cover and the lower end cover are assembled in cooperation with each other through locking bolts and nuts.

5. The pneumatic diaphragm valve according to claim 4, characterized in that: The pad is made of rubber material.

6. The pneumatic diaphragm valve according to claim 5, characterized in that: The upper end of the valve body is threadedly connected with a sealing cover, the upper end of the regulating rod is located inside the sealing cover, and the upper side of the regulating rod is plugged into the valve body.

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