Diaphragm valve for air pipe connection in air source box

Abstract

The utility model discloses a diaphragm valve for connecting air pipes in an air source box, which comprises a cavity, the top of the cavity is in bolted connection with an extrusion unit, a sealing gasket is arranged at the joint of the extrusion unit and the cavity in a pressing manner, connectors are fixedly connected to two end interfaces of the cavity, a spacer block is fixedly connected to the center of the inside of the cavity, and the spacer block is fixedly connected to the top of the cavity. The cross section of each partition block is in the shape of an isosceles trapezoid, the top of each partition block is in the shape of a semi-arc part, the internal partition blocks can be conveniently used for partitioning internal gas, and meanwhile the arranged semi-arc parts can be convenient for the pressing blocks to extrude the extension parts. According to the utility model, the top of the cavity is provided with the operation structure which is elastically matched with the pneumatic operation structure, so that the opening and closing operation can be quickly carried out, the convenience in operation and use is improved, and meanwhile, the internal sealing gasket is arranged in a sawtooth shape, so that the sealing gasket has certain ductility when being extruded, and the sealing effect is improved. And the service life of the sealing gasket is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of gas source box applications, in particular to a diaphragm valve for connecting gas pipes in a gas source box. Background Art

[0002] The gas source box is a device used to centrally distribute and regulate working gases. It is usually used in industrial automation control systems to provide equipment with a stable gas source. The gas source box is connected to the factory gas source and distributes stable gas to each working node after internal filtering, pressure regulation and other processing. It can ensure that the gas pressure and flow meet the system requirements.

[0003] When the existing gas source box is in use, it needs to connect multiple gas pipes inside to facilitate the gas transportation of internal electrical components, and valves generally need to be added to the pipeline for control. The diaphragm valve used for traditional pipeline connection generally needs to be manually rotated during use, which is not very convenient to operate. In addition, the internal sealing gasket will be damaged at its bending and stretching parts after being squeezed for a long time, thereby reducing its service life. Therefore, the utility model proposes a diaphragm valve for connecting the air pipe in the gas source box. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a diaphragm valve for connecting the air pipe in the air source box. By arranging an elastic and pneumatic operating structure on the top of the cavity, the diaphragm valve can be quickly opened and closed, thereby improving the convenience of operation. At the same time, the internal sealing gasket is arranged in a serrated shape, so that when the sealing gasket is squeezed, it can have a certain ductility, thereby increasing the service life of the sealing gasket.

[0005] In order to solve the above technical problems, a technical solution adopted by the utility model is: to provide a diaphragm valve for connecting the air pipe in the air source box, including a cavity, the top of the cavity is bolted with an extrusion unit, the connection between the extrusion unit and the cavity is tightly provided with a sealing gasket, and the two end interfaces of the cavity are fixedly connected with connecting parts.

[0006] The utility model is further configured as follows: a spacer is fixedly connected to the inner center of the cavity, the cross section of the spacer is an isosceles trapezoid, and the top of the spacer is a semicircular arc portion.

[0007] Through the above technical solution, it is convenient to use the internal spacer to isolate the internal gas, and at the same time, the semicircular arc portion can facilitate the pressing block to squeeze the extension portion so that it can match the arc portion.

[0008] The present invention is further configured as follows: the sealing gasket includes a pressing portion, the middle portion of the pressing portion is fixedly connected to an extension portion, and the cross section of the extension portion is corrugated and circular.

[0009] Through the above technical solution, the clamping part can be used to stably install it between the fixed plate and the connecting plate, so that it can remain stable during use. At the same time, the extension part can adaptively extend when squeezed, preventing wear on the sealing gasket during long-term squeezing.

[0010] The present invention is further configured as follows: the extrusion unit includes a connecting plate, the connecting plate is bolted to a fixed plate fixedly connected to the top of the cavity, and the sealing gasket is pressed tightly inside, the top of the connecting plate is fixedly connected to a sleeve, the inner wall of the sleeve is fixedly connected to a partition near the bottom, the inner wall of the partition is smoothly fitted with a piston rod, the end face of the piston rod is threadedly connected to a pressure block, the outer wall of the piston rod is wrapped with a spring, the top of the piston rod is fixedly connected to a slide, the outer wall of the slide is sleeved with a sealing ring, and the top of the sleeve is bolted to an end cover of the mounting connection port.

[0011] Through the above technical solution, external gas is used to enter the interior of the sleeve through the connecting port, thereby squeezing the slide plate, causing it to drive the pressure block connected to the end face of the piston rod to move, causing it to squeeze the extension part, so that it fits on the arc part to form a sealing effect.

[0012] The utility model is further configured as follows: the pressing block is hemispherical, and the bottom is tightly abutted against the top of the sealing gasket.

[0013] With the above technical solution, when the pressure block is used to squeeze the sealing gasket, the extended portion can be fitted onto the arc portion, thereby sealing the interior of the cavity and blocking the gas.

[0014] The utility model is further configured as follows: the end faces of the spring are respectively tightly arranged against the opposite faces of the partition and the slide, and the slide is fitted with the inner walls of the sleeve and the end cover through an external sealing ring.

[0015] Through the above technical solution, after the internal gas flows back, the internally compressed spring uses its elasticity to make the slide drive the piston rod to move, thereby making the bottom pressure block away from the sealing gasket, making the interior of the cavity connected, and facilitating the flow of gas.

[0016] The utility model is further configured as follows: the connecting piece includes a connecting pipe, the outer wall of the connecting pipe is threadedly connected with a locking nut, the end face of the connecting pipe is fixedly connected with a connecting flange, and the inner wall of the port of the connecting pipe is embedded with a sealing sleeve.

[0017] The above technical solution facilitates the stable fixing of the connecting pipe at the port of the cavity by means of the locking bolts, while the connecting flange can be used to seal and fix the connecting pipe to the external pipeline.

[0018] The beneficial effects of the utility model are as follows:

[0019] 1. The diaphragm valve for connecting the air pipe in the air source box proposed in this utility model is provided with an elastic and pneumatic operating structure at the top of the cavity, so that it can be opened and closed quickly, thereby improving the convenience of operation;

[0020] 2. The utility model proposes a diaphragm valve for connecting the air pipe in the air source box, which has a serrated arrangement of the internal sealing gasket so that when the sealing gasket is squeezed, it can have a certain degree of ductility, thereby increasing the service life of the sealing gasket. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a structural diagram of a diaphragm valve for connecting an air pipe in an air source box of the utility model;

[0022] Figure 2 This is an exploded view of a diaphragm valve for connecting an air pipe in an air source box according to the present invention;

[0023] Figure 3 This is a cross-sectional view of a diaphragm valve for connecting an air pipe in an air source box according to the present invention;

[0024] Figure 4 This is a structural diagram of a sealing gasket in a diaphragm valve for connecting an air pipe in an air source box according to the utility model.

[0025] In the figure: 100, cavity; 101, spacer; 102, arc-shaped portion; 103, fixing plate; 200, sealing gasket; 201, pressing portion; 202, extension portion; 300, extrusion unit; 301, connecting plate; 302, sleeve; 303, partition; 304, piston rod; 305, pressure block; 306, spring; 307, slide plate; 308, sealing ring; 309, end cover; 309a, connecting port; 400, connecting piece; 401, connecting pipe; 402, locking nut; 403, connecting flange; 404, sealing sleeve. DETAILED DESCRIPTION

[0026] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more precise definition of the protection scope of the present invention.

[0027] like Figures 1-4As shown, a diaphragm valve for connecting an air pipe in an air source box includes a cavity 100, a spacer 101 is fixedly connected to the center of the cavity 100, the cross section of the spacer 101 is arranged in an isosceles trapezoidal shape, and the top of the spacer 101 is a semicircular arc portion 102, which is convenient for using the internal spacer 101 to isolate the internal gas. At the same time, the semicircular arc portion 102 can facilitate the pressing block 305 to squeeze the extension portion 202, which can match the arc portion 102. The connection between the squeezing unit 300 and the cavity 100 is as follows: A sealing gasket 200 is provided for compression, and the sealing gasket 200 includes a compression portion 201, and an extension portion 202 is fixedly connected to the middle position of the compression portion 201. The cross section of the extension portion 202 is corrugated and circular, which facilitates the use of the compression portion 201 to stably install it between the fixed plate 103 and the connecting plate 301, so that it can remain stable during use. At the same time, the extension portion 202 can enable it to adaptively extend when squeezed, thereby preventing the sealing gasket 200 from being worn during long-term squeezing.

[0028] like Figure 3As shown, the top of the cavity 100 is bolted to the extrusion unit 300, and the extrusion unit 300 includes a connecting plate 301, which is bolted to the fixing plate 103 fixedly connected to the top of the cavity 100 and presses the sealing gasket 200 inside. The top of the connecting plate 301 is fixedly connected to the sleeve 302, and the inner wall of the sleeve 302 is fixedly connected to the partition 303 near the bottom. The inner wall of the partition 303 is smoothly fitted with a piston rod 304. The piston rod 304 is fixed to the inner wall of the partition 303. The end surface of 04 is threadedly connected with a pressure block 305, which is a hemispherical setting, and the bottom is tightly set against the top of the sealing gasket 200, so that when the pressure block 305 is used to squeeze the sealing gasket 200, it can fit the extension part 202 on the arc part 102, thereby sealing the interior of the cavity 100 and blocking the gas. The outer wall of the piston rod 304 is wrapped with a spring 306, and the end faces of the spring 306 are respectively connected to the partition 303 and the sliding plate 304. The opposite surfaces of the plates 307 are tightly arranged, and the slide plate 307 is fitted with the inner walls of the sleeve 302 and the end cover 309 through the external sealing ring 308, so that after the internal gas flows back, the internally compressed spring 306 uses its elasticity to make the slide plate 307 drive the piston rod 304 to move, thereby making the bottom pressure block 305 away from the sealing gasket 200, so that the interior of the cavity 100 is connected, which facilitates the circulation of gas. The top of the piston rod 304 is fixedly connected to the slide plate 307, and the outer wall of the slide plate 307 is sleeved with the sealing ring 308. The top of the sleeve 302 is bolted to the end cover 309 with the installation connection port 309a. The external gas enters the interior of the sleeve 302 through the connection port 309a, thereby squeezing the slide plate 307, causing it to drive the pressure block 305 connected to the end face of the piston rod 304 to move, causing it to squeeze the extension part 202, so that it fits on the arc part 102 to form a sealing effect.

[0029] like Figure 2 and Figure 3 As shown, connectors 400 are fixedly connected to the interfaces at both ends of the cavity 100, and the connectors 400 include a connecting pipe 401, a locking nut 402 is threadedly connected to the outer wall of the connecting pipe 401, and a connecting flange 403 is fixedly connected to the end face of the connecting pipe 401. A sealing sleeve 404 is embedded in the inner wall of the port of the connecting pipe 401, which facilitates the stable fixation of the connecting pipe 401 at the port of the cavity 100 through the locking bolt 402, and at the same time, the connecting flange 403 can be used to seal and fix it with the external pipeline.

[0030] When the present invention is in use and the diaphragm valve needs to be closed, external gas is used to enter the interior of the sleeve 302 through the connecting port 309a, thereby squeezing the slide plate 307, causing it to drive the pressure block 305 connected to the end face of the piston rod 304 to move, causing it to squeeze the extension portion 202, so that it fits on the arc portion 102 to form a sealing effect. When it needs to be opened, after the internal gas flows back, the internally compressed spring 306 uses its elasticity to make the slide plate 307 drive the piston rod 304 to move, thereby making the pressure block 305 at the bottom move away from the sealing gasket 200, so that the interior of the cavity 100 is connected, which facilitates the circulation of gas.

[0031] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the description and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A diaphragm valve for connecting an air pipe in an air source box, comprising a cavity (100), characterized in that: The top of the cavity (100) is bolted to an extrusion unit (300), and a sealing gasket (200) is tightly provided at the connection between the extrusion unit (300) and the cavity (100); The sealing gasket (200) comprises a pressing portion (201), the middle portion of the pressing portion (201) is fixedly connected to an extension portion (202), and the cross section of the extension portion (202) is corrugated and circular; Connecting pieces (400) are fixedly connected to interfaces at both ends of the cavity (100).

2. The diaphragm valve for connecting an air pipe in an air source box according to claim 1, characterized in that: A spacer (101) is fixedly connected to the inner center of the cavity (100), the cross section of the spacer (101) is arranged in an isosceles trapezoidal shape, and the top of the spacer (101) is a semicircular arc portion (102).

3. The diaphragm valve for connecting an air pipe in an air source box according to claim 1, characterized in that: The extrusion unit (300) includes a connecting plate (301), the connecting plate (301) is bolted to a fixed plate (103) fixedly connected to the top of the cavity (100), and presses the sealing gasket (200) inside, the top of the connecting plate (301) is fixedly connected to a sleeve (302), the inner wall of the sleeve (302) is fixedly connected to a partition (303) near the bottom, the inner wall of the partition (303) is smoothly fitted with a piston rod (304), the end face of the piston rod (304) is threadedly connected to a pressure block (305), the outer wall of the piston rod (304) is wrapped with a spring (306), the top of the piston rod (304) is fixedly connected to a slide plate (307), the outer wall of the slide plate (307) is sleeved with a sealing ring (308), and the top of the sleeve (302) is bolted to an end cover (309) for mounting a connection port (309a).

4. A diaphragm valve for connecting an air pipe in an air source box according to claim 3, characterized in that: The pressing block (305) is hemispherical in shape, and its bottom is tightly pressed against the top of the sealing gasket (200).

5. The diaphragm valve for connecting an air pipe in an air source box according to claim 3, characterized in that: The end faces of the spring (306) are respectively tightly arranged against the opposite faces of the partition (303) and the slide plate (307), and the slide plate (307) is fitted with the inner walls of the sleeve (302) and the end cover (309) via an external sealing ring (308).

6. The diaphragm valve for connecting an air pipe in an air source box according to claim 1, characterized in that: The connecting piece (400) comprises a connecting pipe (401), the outer wall of the connecting pipe (401) is threadedly connected to a locking nut (402), the end face of the connecting pipe (401) is fixedly connected to a connecting flange (403), and the inner wall of the port of the connecting pipe (401) is embedded with a sealing sleeve (404).

Images