Pneumatic valve for waste gas conveying pipeline

Abstract

The utility model discloses a waste gas conveying pipeline pneumatic valve which comprises a valve body, a rotating shaft, a valve plate and a pneumatic switch device, the valve plate is rotatably installed in the valve body through the rotating shaft, the pneumatic switch device is installed outside the valve body and drives the valve plate to rotate through the rotating shaft, and two arc-shaped extending baffles are arranged on the circumferential inner side wall of the valve body. The valve plate is provided with silica gel sealing strips in one-to-one correspondence with the baffles, a plurality of connecting columns are formed on the sides, away from the baffles, of the silica gel sealing strips and distributed at intervals in the length direction of the silica gel sealing strips, an elastic block protruding outwards in the outer radial direction is formed on the peripheral side wall of each connecting column, and a distance is kept between each elastic block and the corresponding silica gel sealing strip. Connecting holes in one-to-one correspondence with the connecting columns are formed in the valve plate, the connecting columns are arranged in the connecting holes in a penetrating mode, the elastic block is connected with the valve plate in a clamping mode so as to limit the silica gel sealing strip to be separated from the valve plate, and the silica gel sealing strip is convenient to install and replace due to the clamping mode.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a pneumatic valve for an exhaust gas conveying pipeline. Background Art

[0002] At present, various chemical, coating, electronic, spraying and other manufacturers will generate a large amount of waste gas during the production process. In order to meet the environmental protection requirements, manufacturers usually connect an exhaust gas treatment device to the output end of the exhaust gas conveying pipeline. The exhaust gas treatment device heats, burns and decomposes the exhaust gas to form carbon dioxide and water, and then discharges them into the atmosphere.

[0003] Generally, a pneumatic valve is provided on the exhaust gas conveying pipeline. The pneumatic valve mainly includes a valve body, a rotating shaft, a valve plate and a pneumatic switch device. The valve plate is rotatably installed in the valve body through the rotating shaft. Two arc-shaped extended baffles are provided on the circumferential inner side wall of the valve body. Silicone sealing strips corresponding to the baffles one by one are provided on the valve plate. The pneumatic switch device drives the valve plate to rotate through the rotating shaft to open or close the valve plate. Since the traditional silicone sealing strip is fixed on the valve plate by a plurality of screws, when installing and replacing the silicone sealing strip, it is necessary to repeatedly screw in or out the screws, resulting in inconvenient installation and replacement of the silicone sealing strip. Content of the Utility Model

[0004] Aiming at the deficiencies existing in the prior art, the utility model provides a pneumatic valve for an exhaust gas conveying pipeline, which adopts a clamping method to facilitate the installation and replacement of the silicone sealing strip.

[0005] To achieve the above object, the utility model adopts the following technical solutions:

[0006] A pneumatic valve for an exhaust gas conveying pipeline, including a valve body, a rotating shaft, a valve plate and a pneumatic switch device. The valve plate is rotatably installed in the valve body through the rotating shaft. The pneumatic switch device is installed outside the valve body, and the pneumatic switch device drives the valve plate to rotate through the rotating shaft. Two arc-shaped extended baffles are provided on the circumferential inner side wall of the valve body. Silicone sealing strips corresponding to the baffles one by one are provided on the valve plate. A plurality of connecting columns are formed on the side of the silicone sealing strip away from the baffle. The plurality of connecting columns are distributed at intervals along the length direction of the silicone sealing strip. An elastic block protruding radially outward is formed on the circumferential side wall of each connecting column. A distance is maintained between the elastic block and the silicone sealing strip. Connecting holes corresponding to the connecting columns one by one are provided on the valve plate. The connecting columns pass through the connecting holes. The elastic block is clamped with the valve plate to limit the silicone sealing strip from separating from the valve plate.

[0007] By providing a number of connecting columns on the side of the silicone sealing strip away from the baffle, an elastic block protruding radially outward is formed on the circumferential side wall of each connecting column, and there is a spacing between the elastic block and the silicone sealing strip, and connecting holes corresponding to the connecting columns one by one are provided on the valve plate; during assembly, the connecting columns are inserted into the connecting holes, so that the elastic blocks pass through the connecting holes and are clamped with the valve plate, thereby restricting the silicone sealing strip from detaching from the valve plate; during disassembly, the silicone sealing strip is pulled to cause elastic deformation of the elastic block to disengage from the connecting hole, releasing the clamping of the elastic block and the valve plate, so that the silicone sealing strip detaches from the valve plate. Thus, by using the clamping method, the installation and replacement of the silicone sealing strip are convenient.

[0008] As a preferred solution, a groove is radially concavely provided at one end of the connecting hole away from the silicone sealing strip, and the elastic block is clamped in the groove.

[0009] As a preferred solution, the circumferential outer side wall of the elastic block is connected with the circumferential inner side wall of the groove in an interference fit manner.

[0010] As a preferred solution, a step is formed between the groove and the connecting hole, the elastic block is closely attached to the step, and the silicone sealing strip is closely attached to the valve plate.

[0011] As a preferred solution, the diameter d1 of the connecting column < the diameter d2 of the connecting hole < the diameter d3 of the elastic block.

[0012] As a preferred solution, the length b between the end of the connecting column away from the silicone sealing strip and the elastic block > the thickness h of the valve plate.

[0013] As a preferred solution, b - h ≥ 6mm.

[0014] As a preferred solution, the elastic block is a complete annular elastic block.

[0015] As a preferred solution, a chamfer is provided around the end of the elastic block away from the silicone sealing strip, and one side of the chamfer extends to the connecting column.

[0016] As a preferred solution, the top of the silicone sealing strip has an arc surface, and the arc surface protrudes towards the baffle direction.

[0017] Compared with the prior art, the utility model has obvious advantages and beneficial effects. Specifically, a plurality of connecting columns are arranged on the side of the silicone sealing strip away from the baffle plate, and the peripheral side wall of each connecting column is formed with an elastic block protruding radially outward, and a spacing is maintained between the elastic block and the silicone sealing strip, and connecting holes corresponding to the connecting columns are arranged on the valve plate; when assembling, the connecting columns are inserted into the connecting holes, and the elastic blocks are clamped with the valve plate after passing through the connecting holes, thereby limiting the silicone sealing strip from separating from the valve plate; when disassembling, the silicone sealing strip is pulled to make the elastic block elastically deform and separate from the connecting hole, and the clamping connection between the elastic block and the valve plate is released, so that the silicone sealing strip is separated from the valve plate, thereby adopting the clamping method, which makes the silicone sealing strip easy to install and replace.

[0018] In order to more clearly explain the structural features, technical means and specific purposes and functions achieved by the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments: BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a top view schematic diagram of the assembly structure of an embodiment of the utility model;

[0020] Figure 2 It is a cross-sectional schematic diagram of an embodiment of the utility model;

[0021] Figure 3 yes Figure 2 A partial enlarged schematic diagram of part A.

[0022] Description of the accompanying drawings:

[0023] 10-valve body, 11-rotating shaft, 12-valve plate, 121-connecting hole, 122-groove, 123-step, 13-baffle, 20-silicone sealing strip, 201-arc surface, 21-connecting column, 22-elastic block, 221-chamfered angle. DETAILED DESCRIPTION

[0024] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the position or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0025] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. 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, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0026] As Figures 1-3 shown, the present utility model discloses a pneumatic valve for an exhaust gas conveying pipeline, which includes a valve body 10, a rotating shaft 11, a valve plate 12, and a pneumatic switch device (not shown). The valve plate 12 is rotatably installed in the valve body 10 through the rotating shaft 11. The pneumatic switch device is installed outside the valve body 10, and the pneumatic switch device drives the valve plate 12 to rotate through the rotating shaft 11. Two arc-shaped extending baffles 13 are provided on the circumferential inner side wall of the valve body 10, and silica gel sealing strips 20 corresponding to the baffles 13 one by one are provided on the valve plate 12.

[0027] A plurality of connecting columns 21 are formed on the side of the silica gel sealing strip 20 away from the baffle 13. The plurality of connecting columns 21 are spaced apart along the length direction of the silica gel sealing strip 20. An elastic block 22 protruding radially outward is formed on the circumferential side wall of each connecting column 21. A gap is maintained between the elastic block 22 and the silica gel sealing strip 20. Connecting holes 121 corresponding to the connecting columns 21 one by one are provided on the valve plate 12. The connecting columns 21 are inserted into the connecting holes 121, and the elastic block 22 is clamped with the valve plate 12 to prevent the silica gel sealing strip 20 from detaching from the valve plate 12.

[0028] A groove 122 is recessed radially outward at one end of the connecting hole 121 away from the silica gel sealing strip 20. The elastic block 22 is clamped in the groove 122. By providing the groove 122, the elastic block 22 is clamped in the groove 122, making the assembly of the elastic block 22 and the valve plate 12 more compact and occupying less space.

[0029] The circumferential outer side wall of the elastic block 22 is connected with the circumferential inner side wall of the groove 122 in an interference fit manner. By providing the interference fit connection between the elastic block 22 and the groove 122, the loosening of the elastic block 22 is avoided, and at the same time, the sealing performance between the elastic block 22 and the groove 122 is improved.

[0030] A step 123 is formed between the groove 122 and the connection hole 121. The elastic block 22 is in close fit with the step 123, and the silicone sealing strip 20 is in close fit with the valve plate 12. By providing the step 123 between the groove 122 and the connection hole 121, with the elastic block 22 in close fit with the step 123 and the silicone sealing strip 20 in close fit with the valve plate 12, the sealing performance at the connection between the silicone sealing strip 20 and the elastic block 22 and the valve plate 12 is good.

[0031] The diameter d1 of the connection post 21 < the diameter d2 of the connection hole 121 < the diameter d3 of the elastic block 22. By setting the diameter d1 of the connection post 21 < the diameter d2 of the connection hole 121 < the diameter d3 of the elastic block 22, during assembly, it is beneficial for the elastic block 22 to pass through the connection hole 121 and be snap-fitted into the groove 122.

[0032] The length b between the end of the connection post 21 away from the silicone sealing strip 20 and the elastic block 22 > the thickness h of the valve plate 12. By setting the length b between the end of the connection post 21 away from the silicone sealing strip 20 and the elastic block 22 > the thickness h of the valve plate 12, during assembly, the end of the connection post 21 away from the silicone sealing strip 20 passes through the connection hole 121 and extends outwards, facilitating the worker to pull outwards the extended part of the connection post 21, causing the elastic block 22 to undergo elastic deformation and then pass through the connection hole 121 and be snap-fitted onto the valve plate 12, which is convenient for assembly.

[0033] The length b - the thickness h ≥ 6 mm.

[0034] The elastic block 22 is a complete annular elastic block 22.

[0035] An inclined chamfer 221 is provided around the end of the elastic block 22 away from the silicone sealing strip 20, and one side of the inclined chamfer 221 extends to the connection post 21. By providing the inclined chamfer 221, during assembly, it is beneficial for the elastic block 22 to pass through the connection hole 121 and be snap-fitted onto the valve plate 12, and the assembly is convenient.

[0036] The top of the silicone sealing strip 20 has an arc surface 201, and the arc surface 201 protrudes towards the baffle 13.

[0037] In summary, in the present utility model, a plurality of connecting columns 21 are provided on one side of the silicone sealing strip 20 away from the baffle 13. An elastic block 22 protruding radially outward is formed on the peripheral side wall of each connecting column 21, and a gap is maintained between the elastic block 22 and the silicone sealing strip 20. A connecting hole 121 corresponding to the connecting column 21 one by one is provided on the valve plate 12. During assembly, the connecting column 21 is inserted into the connecting hole 121, so that the elastic block 22 passes through the connecting hole 121 and is clamped with the valve plate 12, thereby restricting the silicone sealing strip 20 from detaching from the valve plate 12. During disassembly, the silicone sealing strip 20 is pulled to cause elastic deformation of the elastic block 22 to disengage from the connecting hole 121, releasing the clamping of the elastic block 22 and the valve plate 12, so that the silicone sealing strip 20 detaches from the valve plate 12. Thus, by adopting the clamping method, the installation and replacement of the silicone sealing strip 20 are convenient.

[0038] The above are only preferred embodiments of the present utility model and are not intended to limit the present utility model. Therefore, any modifications, equivalent replacements, improvements, etc. made to the above embodiments according to the technical reality of the present utility model still fall within the scope of the technical solutions of the present utility model.

Claims

1. A pneumatic valve for an exhaust gas transmission pipeline, comprising a valve body, a rotating shaft, a valve plate, and a pneumatic switch device. The valve plate is rotatably installed in the valve body through the rotating shaft. The pneumatic switch device is installed outside the valve body, and the pneumatic switch device drives the valve plate to rotate through the rotating shaft. Two arc-shaped extending baffles are provided on the circumferential inner side wall of the valve body, and silica gel sealing strips corresponding to the baffles one by one are provided on the valve plate. It is characterized in that: On the side of the silica gel sealing strip away from the baffle, a number of connecting columns are formed. The connecting columns are spaced apart along the length direction of the silica gel sealing strip. An elastic block protruding radially outward is formed on the circumferential side wall of each connecting column. A distance is maintained between the elastic block and the silica gel sealing strip. Connecting holes corresponding to the connecting columns one by one are provided on the valve plate. The connecting columns are inserted into the connecting holes, and the elastic blocks are clamped with the valve plate to prevent the silica gel sealing strip from detaching from the valve plate.

2. The pneumatic valve for the exhaust gas conveying pipeline according to claim 1, wherein A groove is recessed radially outward at one end of the connecting hole away from the silica gel sealing strip, and the elastic block is clamped in the groove.

3. The pneumatic valve for the exhaust gas conveying pipeline according to claim 2, wherein, The circumferential outer side wall of the elastic block is connected with the circumferential inner side wall of the groove in an interference fit manner.

4. The pneumatic valve for the exhaust gas conveying pipeline according to claim 2, wherein, A step is formed between the groove and the connecting hole, and the elastic block is closely attached to the step, and the silica gel sealing strip is closely attached to the valve plate.

5. The pneumatic valve for the exhaust gas conveying pipeline according to claim 1, wherein, The diameter d1 of the connecting column < the diameter d2 of the connecting hole < the diameter d3 of the elastic block.

6. The pneumatic valve for the exhaust gas conveying pipeline according to claim 1, characterized in that, The length b between the end of the connecting column away from the silica gel sealing strip and the elastic block > the thickness h of the valve plate.

7. The pneumatic valve for the exhaust gas conveying pipeline according to claim 6, wherein, The length b - the thickness h ≥ 6 mm.

8. The pneumatic valve for the exhaust gas conveying pipeline according to claim 1, characterized in that, The elastic block is a complete annular elastic block.

9. The pneumatic valve for the exhaust gas conveying pipeline according to claim 1, wherein An inverted chamfer is provided around the end of the elastic block away from the silica gel sealing strip, and one side of the inverted chamfer extends to the connecting column.

10. The pneumatic valve for exhaust gas conveying pipeline according to claim 1, characterized in that, The top of the silica gel sealing strip has an arc surface, and the arc surface protrudes towards the baffle direction.

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