A switch type pneumatic butterfly valve

Abstract

This utility model relates to the field of pneumatic butterfly valve technology and discloses an on / off type pneumatic butterfly valve, including a motor, a fixing ring, and a fixing column. It has a fixing mechanism, which includes a connecting column, a rubber ball, a fixing block, a semi-ring plate, a connecting rod, and a limiting strip. Utilizing the elastic expansion force of the rubber ball, the limiting strip is quickly locked into the groove of the connecting column through the linkage of the fixing block, the semi-ring plate, and the connecting rod. The butterfly valve also has a release component. Through the linkage of the control column driving the gear rack and guide plate, the compression strip squeezes the rubber ball, causing it to contract, thereby disengaging the limiting strip from the groove for quick separation. The convex ring on the outer periphery of the valve engages with the concave ring on the inner wall of the connecting pipe, and compresses the adjacent rubber gasket, forming a double seal. This utility model solves the problem of cumbersome disassembly and assembly in existing technologies, achieves rapid fixing and separation of the actuator and valve body, improves installation and maintenance efficiency, and the double sealing structure ensures reliable sealing.

Description

Technical Field

[0001] This utility model relates to the field of pneumatic butterfly valve technology, and in particular to an on / off type pneumatic butterfly valve. Background Technology

[0002] Pneumatic butterfly valves are common actuators in industrial pipeline systems. They typically consist of two main parts: a pneumatic actuator (or a power component containing an electric motor) and a butterfly valve body. The actuator provides the power to open and close the valve, while the valve body is mounted on the pipeline and comes into contact with the medium.

[0003] In practical applications, a reliable connection between the actuator and the valve body is required. Existing connection methods commonly use flange connections secured with multiple bolts. While this structure provides a robust connection, its disassembly and assembly processes reveal significant shortcomings when valve maintenance, repair, or component replacement is needed.

[0004] Specifically, maintenance personnel need to use specialized tools to loosen or tighten multiple bolts one by one. This process is not only time-consuming and labor-intensive, but also particularly inconvenient in complex on-site environments and narrow installation spaces. This cumbersome disassembly and assembly process greatly reduces maintenance efficiency and prolongs equipment downtime, failing to meet the demands of modern industry for rapid response and convenient maintenance. Therefore, this utility model proposes an on / off pneumatic butterfly valve m to address the shortcomings of the existing technology. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a switch-type pneumatic butterfly valve, which aims to improve the problems of complex actuator-valve body connection structure, bolt fastening, and cumbersome and time-consuming disassembly and assembly process in some existing switch-type pneumatic butterfly valves.

[0006] This utility model provides an on / off type pneumatic butterfly valve, including: a motor; a fixing ring fixedly connected to the bottom end of the motor; and a fixing column fixedly connected to a connecting pipe.

[0007] The on / off type pneumatic butterfly valve also includes a fixing mechanism, which includes multiple connecting columns arranged radially along the fixing ring. One end of the connecting column is fixedly connected to the top of the fixing column, and the other end of the connecting column is inserted into the interior of the fixing ring.

[0008] The fixing mechanism also includes a rubber ball housed within the space enclosed by multiple connecting columns, multiple fixing blocks abutting against the outer wall of the rubber ball, multiple semi-ring plates, multiple connecting rods, and multiple limiting strips. The fixing blocks are radially slidably connected to the inner side of the semi-ring plates; one end of the connecting rod is fixed to the outer side of the semi-ring plate, and the other end of the connecting rod is fixed to the limiting strip; the limiting strip is engaged in the limiting groove on the inner wall of the connecting column under the elastic expansion force of the rubber ball.

[0009] Preferably, the on / off pneumatic butterfly valve further includes a release assembly disposed within a fixed ring; the release assembly includes: a control column that can move axially through the fixed ring; a push column that is linked to the control column and elastically supported by a spring; a spring; a rack that is fixed to the push column and slides along the inner wall of the fixed ring; and a gear that is rotatably connected within the fixed ring and meshes with the rack for transmission.

[0010] Preferably, the gear is rotatably mounted on a support shaft fixed inside the retaining ring.

[0011] Preferably, the release assembly further includes: a guide disk fixed to the bottom end of the gear; a plurality of guide posts slidably disposed on the guide disk; and a plurality of extrusion strips respectively connected to the guide posts and used to extrude the rubber ball.

[0012] Preferably, the inner wall of the guide plate is provided with a guide groove, and the guide column is slidably fitted in the guide groove.

[0013] Preferably, the on / off pneumatic butterfly valve further includes a sealing mechanism disposed inside the connecting pipe; the sealing mechanism includes a rubber ring fixedly connected to the inner wall of the connecting pipe, and a concave ring is provided on the inner wall of the rubber ring in the circumferential direction; the sealing mechanism also includes a valve rotatably disposed inside the connecting pipe, and a convex ring that cooperates with the concave ring is fixedly connected to the outer peripheral edge of the valve.

[0014] Preferably, a plurality of rubber pads are fixedly connected to the outer wall of the valve and adjacent to the convex ring. The rubber pads are compressed and adhere to the inner wall of the concave ring when the convex ring is embedded in the concave ring.

[0015] Preferably, a second fixed column is fixedly connected to the bottom end of the first fixed column, and the bottom end of the second fixed column is fixedly connected to the connecting pipe.

[0016] This utility model has the following beneficial effects: 1. This utility model, by setting up a fixing mechanism driven by an elastic rubber ball and a manually operated release component, utilizes the elastic expansion of the rubber ball to push the limit strip into the connecting column to achieve automatic locking. The limit strip is retracted by the transmission structure such as rack, pinion, and guide plate to unlock the device. This solves the problem that the actuator and valve body are mostly connected by bolts in the prior art, which leads to cumbersome disassembly and assembly, time-consuming and inconvenient on-site maintenance. It achieves the technical effect of ingenious structure and convenient operation, which can realize the rapid fixing and separation between the actuator and the valve body, and greatly improves the efficiency of installation and maintenance.

[0017] 2. This utility model solves the problem of single valve sealing structure, low sealing reliability and easy leakage under some working conditions in the prior art, by setting a sealing mechanism between the valve and the connecting pipe, so that the convex ring on the outer periphery of the valve is embedded in the concave ring on the rubber ring on the inner wall of the connecting pipe. At the same time, the rubber gasket next to the convex ring is deformed by pressure during the fitting to fill the gap. It achieves a dual sealing effect of mechanical seal and elastic seal, with reliable structure, greatly improves the sealing performance of the valve in the closed state, and effectively prevents media leakage.

[0018] 3. This utility model uses a rubber ball as the central elastic drive source and a linkage structure of a fixed block, a semi-ring plate, and a connecting rod to drive multiple limiting strips to expand and contract radially. This solves the problems of complex structure or uneven locking force that may exist in traditional buckling mechanisms, and achieves the technical effect of compact structure, ingenious design, and uniform and reliable locking force, ensuring the stability of the connection between the fixed column and the fixed ring. Attached Figure Description

[0019] Figure 1 This is a three-dimensional schematic diagram of a switch-type pneumatic butterfly valve proposed in this utility model; Figure 2 This is a schematic diagram of the structure of the fixing ring of a switch-type pneumatic butterfly valve proposed in this utility model; Figure 3 for Figure 2 Enlarged view of point A in the middle; Figure 4 for Figure 2 Enlarged view of point B in the middle; Figure 5 This is a schematic diagram of the connecting column of a switch-type pneumatic butterfly valve proposed in this utility model; Figure 6 for Figure 5 Enlarged view of point C in the middle; Figure 7 for Figure 5 Enlarged view at point D; Figure 8 This is a schematic diagram of the structure of a switch-type pneumatic butterfly valve proposed in this utility model; Figure 9 for Figure 8 Enlarged view at point E in the middle; Figure 10 This is a schematic diagram of the structure of the rubber ring of the on / off pneumatic butterfly valve proposed in this utility model; Figure 11 for Figure 10 Enlarged view of point F in the middle.

[0020] Legend: 1. Motor; 2. Retaining ring; 3. Fixing mechanism; 31. Rubber ball; 32. Fixing block; 33. Semi-ring plate; 34. Connecting rod; 35. Limiting strip; 36. Connecting column; 37. Release assembly; 371. Guide plate; 372. Extrusion bar; 373. Guide post; 374. Support shaft; 375. Gear; 376. Rack; 377. Push post; 378. Control post; 379. Spring; 4. Fixing post one; 5. Fixing post two; 6. Connecting pipe; 7. Sealing mechanism; 71. Rubber ring 1; 72. Concave ring; 73. Convex ring; 74. Rubber pad; 75. Valve. Detailed Implementation

[0021] 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, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Example: Reference Figures 1 to 11 This utility model provides a switch-type pneumatic butterfly valve, which aims to solve the problems of cumbersome disassembly and assembly of actuators and valve bodies and insufficient reliability due to the simple sealing structure in the prior art.

[0023] like Figure 1 As shown, the device includes a motor 1, a fixing ring 2 fixedly connected to the bottom end of the motor 1, a fixing post 4 fixedly connected to the bottom end of the fixing ring 2, a fixing post 5 fixedly connected to the bottom end of the fixing post 4, and a connecting pipe 6 fixedly connected to the bottom end of the fixing post 5. The switch-type pneumatic butterfly valve also includes a fixing mechanism 3.

[0024] Please refer to Figures 2 to 7 The fixing mechanism 3 includes multiple connecting posts 36 arranged radially along the fixing ring 2. One end of the connecting post 36 is fixedly connected to the top of the fixing post 4, and the other end of the connecting post 36 is inserted into the interior of the fixing ring 2. The fixing mechanism 3 also includes a rubber ball 31 housed in the space enclosed by the multiple connecting posts 36, multiple fixing blocks 32 abutting against the outer wall of the rubber ball 31, multiple semi-ring plates 33, the fixing blocks 32 being radially slidably connected to the inner side of the semi-ring plates 33, multiple connecting rods 34, one end of the connecting rod 34 being fixed to the outer side of the semi-ring plates 33, and multiple limiting strips 35, the other end of the connecting rod 34 being fixed to the limiting strips 35, and the limiting strips 35 being engaged in the limiting grooves on the inner wall of the connecting post 36 under the action of the elastic expansion force of the rubber ball 31.

[0025] It also includes a release component 37 disposed within the retaining ring 2; Reference Figure 2 , Figure 3 and Figure 4 The release assembly 37 includes a control post 378 that is axially movable and passes through the fixed ring 2, a push post 377 that is linked to the control post 378, and a spring 379 that elastically supports the push post 377; the release assembly 37 also includes a rack 376 fixed to the push post 377 and sliding along the inner wall of the fixed ring 2, and a gear 375 rotatably connected to the fixed ring 2 and meshing with the rack 376; see reference Figure 4 Gear 375 is rotatably mounted on support shaft 374 fixed inside fixed ring 2; Reference Figure 3 The release assembly 37 further includes a guide disk 371 fixed to the bottom end of the gear 375, a plurality of guide posts 373 slidably disposed on the guide disk 371, and a plurality of extrusion strips 372 respectively connected to the guide posts 373 and used to extrude the rubber ball 31; the inner wall of the guide disk 371 is provided with a guide groove, and the guide posts 373 are slidably engaged in the guide groove.

[0026] Reference Figure 1 , Figure 8 , Figure 9 , Figure 10 and Figure 11 The on / off pneumatic butterfly valve also includes a sealing mechanism 7 disposed inside the connecting pipe 6. A rubber ring 71 is fixedly connected to the inner wall of the connecting pipe 6. A concave ring 72 is provided on the inner wall of the rubber ring 71. The sealing mechanism 7 also includes a valve 75 rotatably disposed inside the connecting pipe 6. A convex ring 73 that cooperates with the concave ring 72 is fixedly connected to the outer peripheral edge of the valve 75. Reference Figure 8 and Figure 9 Multiple rubber pads 74 are fixedly connected to the outer wall of the valve 75 and near the position of the convex ring 73. The rubber pads 74 are compressed and adhere to the inner wall of the concave ring 72 when the convex ring 73 is embedded in the concave ring 72. Reference Figure 1 The bottom end of the first fixed column 4 is fixedly connected to the second fixed column 5, and the bottom end of the second fixed column 5 is fixedly connected to the connecting pipe 6.

[0027] The implementation principle of this application embodiment is as follows: When installation is performed, multiple connecting posts 36 at the top of the fixing post 4 are inserted into the interior of the fixing ring 2. At this time, the rubber ball 31 in the fixing mechanism 3 is in an elastic expansion state. The rubber ball 31 pushes multiple fixing blocks 32 outward. The fixing blocks 32 slide radially and push the semi-ring plate 33. The semi-ring plate 33 drives the limiting strip 35 through its fixed connecting rod 34. The limiting strip 35 moves outward and is engaged in the limiting slot on the inner wall of the connecting post 36, thereby realizing the rapid fixing between the fixing ring 2 and the fixing post 4. When it is necessary to release the fixation, push the control column 378 in the release assembly 37. The control column 378 drives the push column 377 to move and compress the spring 379. The push column 377 drives the rack 376 fixed thereto to slide along the inner wall of the fixing ring 2. The rack 376 meshes with the gear 375 to drive the gear 375 to rotate around the support shaft 374. The gear 375 drives the guide plate 371 at its bottom to rotate synchronously. The guide groove on the inner wall of the guide plate 371 pushes the guide column 373 and drives the extrusion strip 372 to retract inward through sliding cooperation with the guide column 373. The extrusion strip 372 together extrudes the rubber ball 31 to deform and retract. After the rubber ball 31 retracts, it releases the pushing force on the fixing block 32. The limiting strip 35 retracts inward under the linkage of the connecting rod 34 and the semi-ring plate 33 and disengages from the limiting slot on the inner wall of the connecting column 36. At this time, the fixing column 4 together with the connecting column 36 can be pulled out from the fixing ring 2. When the motor 1 drives the valve 75 to the closed position, the convex ring 73 located on the outer periphery of the valve 75 is precisely embedded in the concave ring 72 on the rubber ring 71 on the inner wall of the connecting pipe 6, forming a mechanical fit seal. At the same time, multiple rubber pads 74 fixed to the outer wall of the valve 75 and adjacent to the convex ring 73 are compressed and undergo elastic deformation during the process of the convex ring 73 being embedded in the concave ring 72. The compressed rubber pads 74 are tightly attached to the inner wall of the concave ring 72, thereby achieving a double seal.

Claims

1. An on / off pneumatic butterfly valve, comprising: The motor (1) has a fixed ring (2) at the bottom of the motor (1) and a fixed post (4) with a connecting pipe (6) at the bottom of the motor (1). The switch-type pneumatic butterfly valve is characterized in that it further includes a fixing mechanism (3), the fixing mechanism (3) includes a plurality of connecting columns (36) arranged radially along the fixing ring (2), one end of the connecting column (36) is fixedly connected to the top of the fixing column (4), and the other end of the connecting column (36) is inserted into the interior of the fixing ring (2). The fixing mechanism (3) also includes a rubber ball (31) housed in the space enclosed by the plurality of connecting columns (36), a plurality of fixing blocks (32) abutting against the outer wall of the rubber ball (31), a plurality of semi-ring plates (33), the fixing blocks (32) being radially slidably connected to the inner side of the semi-ring plates (33), a plurality of connecting rods (34), one end of the connecting rods (34) being fixed to the outer side of the semi-ring plates (33), and a plurality of limiting strips (35), the other end of the connecting rods (34) being fixed to the limiting strips (35).

2. The on / off pneumatic butterfly valve according to claim 1, characterized in that, The switch-type pneumatic butterfly valve also includes a release assembly (37) disposed within the fixed ring (2). The release assembly (37) includes: a control post (378) that is axially movable and passes through the fixed ring (2); a push post (377) that is linked to the control post (378) and elastically supported by a spring (379); a rack (376) that is fixed to the push post (377) and slides along the inner wall of the fixed ring (2); and a gear (375) that is rotatably connected to the fixed ring (2) and meshes with the rack (376). The limiting strip (35) is engaged in the limiting groove on the inner wall of the connecting post (36) under the elastic expansion force of the rubber ball (31).

3. The on / off pneumatic butterfly valve according to claim 2, characterized in that, The gear (375) is rotatably mounted on a support shaft (374) fixed inside the fixed ring (2).

4. The on / off pneumatic butterfly valve according to claim 2, characterized in that, The release assembly (37) further includes: a guide disk (371) fixed to the bottom end of the gear (375), a plurality of guide posts (373) slidably disposed on the guide disk (371), and a plurality of extrusion strips (372) respectively connected to the guide posts (373) and used to extrude the rubber ball (31).

5. The on / off pneumatic butterfly valve according to claim 4, characterized in that, The inner wall of the guide plate (371) is provided with a guide groove, and the guide post (373) is slidably fitted in the guide groove.

6. The on / off pneumatic butterfly valve according to claim 1, characterized in that, The switch-type pneumatic butterfly valve also includes a sealing mechanism (7) disposed inside the connecting pipe (6). A rubber ring (71) is fixedly connected to the inner wall of the connecting pipe (6). A concave ring (72) is provided on the inner wall of the rubber ring (71) in the circumferential direction. The sealing mechanism (7) also includes a valve (75) rotatably disposed inside the connecting pipe (6). A convex ring (73) that cooperates with the concave ring (72) is fixedly connected to the outer peripheral edge of the valve (75).

7. The on / off pneumatic butterfly valve according to claim 6, characterized in that, Multiple rubber pads (74) are fixedly connected to the outer wall of the valve (75) and adjacent to the convex ring (73). The rubber pads (74) are pressed and adhere to the inner wall of the concave ring (72) when the convex ring (73) is embedded in the concave ring (72).

8. The on / off pneumatic butterfly valve according to claim 1, characterized in that, The bottom end of the first fixed column (4) is fixedly connected to the second fixed column (5), and the bottom end of the second fixed column (5) is fixedly connected to the connecting pipe (6).

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