Pneumatic butterfly valve

Abstract

The utility model discloses a pneumatic butterfly valve which comprises an air cylinder and a valve body, a front end flange and a rear end flange are arranged at the two ends of the valve body, a valve plate and a valve rod are arranged in the valve body, the output end of the air cylinder is connected with the valve rod, and a support is fixed between the air cylinder and the valve body. Two first fixing frames and two second fixing frames are arranged on the two sides of the two ends of the valve body correspondingly, the first fixing frames and the second fixing frames are each in a [shape, each first fixing frame comprises a first pressing plate, a first connecting plate and a first base plate, and each second fixing frame comprises a second pressing plate, a second connecting plate and a second base plate; a pair of rotating rods are arranged on the two sides between the front end flange and the rear end flange, the rotating rods are provided with external threads with opposite rotating directions with the midpoint as the boundary, a first connecting part is arranged above the first base plate, the first connecting part is provided with a first screw hole and connected with the corresponding rotating rod, and a second connecting part is arranged above the second base plate and connected with the second screw hole. The second connecting part is provided with a second screw hole and is connected with the corresponding rotating rod; the device further comprises a pair of driving mechanisms.

Description

Technical Field

[0001] The utility model relates to the field of valves, and particularly relates to a pneumatic butterfly valve. Background Art

[0002] A pneumatic butterfly valve is composed of a pneumatic actuator and a butterfly valve. The pneumatic butterfly valve uses a circular butterfly plate that rotates with the valve stem for opening and closing to achieve the opening and closing action of a pneumatic valve. It is mainly used as a cut-off valve and can also be designed to have the function of adjustment or both cut-off and adjustment. The use of butterfly valves on low-pressure large and medium-diameter pipelines is increasing. Classification of pneumatic butterfly valves: stainless steel pneumatic butterfly valves, hard-sealed pneumatic butterfly valves, soft-sealed pneumatic butterfly valves, carbon steel pneumatic butterfly valves.

[0003] As the prior art, Chinese Patent CN217874411U proposed a pneumatic flange butterfly valve that is easy to disassemble, achieving convenient installation between the butterfly valve and the pipe body. However, in this technical solution, the staff still needs to manually drive the rubber block with the rotating screw a to press the butterfly valve and the pipe body tightly. The manual operation method is still relatively cumbersome and laborious, and the installation efficiency is not high, leaving room for improvement. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a pneumatic butterfly valve, which realizes the connection between the butterfly valve and the pipe body through an automated method, further improves the installation efficiency, and eliminates the cumbersome manual operation method for the staff.

[0005] To solve the above technical problems, the utility model adopts the following technical solutions: A pneumatic butterfly valve includes a cylinder and a valve body. Front-end flanges and rear-end flanges are provided at both ends of the valve body. A valve plate and a valve stem are provided inside the valve body. The output end of the cylinder is connected to the valve stem. A bracket is fixed between the cylinder and the valve body. Two first fixing brackets and two second fixing brackets are respectively provided on both sides of both ends of the valve body. Both the first fixing bracket and the second fixing bracket are in a U shape. The first fixing bracket includes a first pressing plate, a first connecting plate, and a first base plate. The first pressing plate is arranged parallel to the front-end flange. The second fixing bracket includes a second pressing plate, a second connecting plate, and a second base plate. The second pressing plate is arranged parallel to the rear-end flange. A pair of rotating rods are provided on both sides between the front-end flange and the rear-end flange. The rotating rods are provided with external threads with opposite helix directions with the midpoint as the boundary. A first connecting portion is provided above the first base plate. The first connecting portion is provided with a first screw hole and is connected to the corresponding rotating rod. A second connecting portion is provided above the second base plate. The second connecting portion is provided with a second screw hole and is connected to the corresponding rotating rod; It also includes a pair of driving mechanisms for driving a pair of rotating rods to rotate.

[0006] By adopting the above technical scheme, when the butterfly valve needs to be installed on the pipe body, the front end flange and the rear end flange are aligned with the corresponding pipe body, and the pipe bodies at both ends are respectively located between the first pressure plate and the front end flange and between the second pressure plate and the rear end flange. A pair of driving mechanisms drive a pair of rotating rods to rotate. Since the rotating rods are provided with threads with opposite rotation directions, the first base plate and the second base plate are driven to move closer to each other, and the first fixing frame and the second fixing frame are driven to move closer to each other. The first pressure plates on both sides press and fix the front end flange and the corresponding pipe body, and the second pressure plates on both sides press and fix the rear end flange and the corresponding pipe body, thereby realizing the connection between the butterfly valve and the pipe body in an automated manner, further improving the installation efficiency and eliminating the tedious manual operation of the staff.

[0007] As a further optimization of the utility model, the driving mechanism includes a motor, a first bevel gear and a second bevel gear, the motor is fixed on the bracket, the first bevel gear is fixed on the output shaft of the motor, the second bevel gear is fixed on the corresponding rotating rod, and the first bevel gear is meshed with the second bevel gear.

[0008] By adopting the above technical solution, the motor is pneumatic, and the output shaft rotates to drive the first bevel gear to rotate, thereby driving the second bevel gear to rotate, and thereby driving the rotating rod to rotate.

[0009] As a further optimization of the utility model, a guide rod is further provided between the front end flange and the rear end flange, a first limiting portion is provided below the first substrate, the first limiting portion is provided with a first sliding hole and is slidably connected to the guide rod, and a second limiting portion is provided below the second substrate, the second limiting portion is provided with a second sliding hole and is slidably connected to the guide rod.

[0010] With the above technical solution, when the first substrate and the second substrate move, the first limiting portion and the second limiting portion slide, and play a limiting and guiding role for the first fixing frame and the second fixing frame, thereby improving stability.

[0011] As a further optimization of the utility model, a battery box is provided on the bracket, the battery box is provided with a detachable battery, and the motor is electrically connected to the battery box.

[0012] As a further optimization of the utility model, horizontally extending handles are provided on both sides of the bracket.

[0013] By adopting the above technical solution, when the front end flange and the rear end flange are aligned with the corresponding tube body, they can be held by the handles on both sides, thereby improving portability.

[0014] The beneficial effects of the utility model are as follows: when the butterfly valve needs to be installed on the pipe body, the front end flange and the rear end flange are aligned with the corresponding pipe body, and the pipe bodies at both ends are respectively located between the first pressure plate and the front end flange and between the second pressure plate and the rear end flange. A pair of driving mechanisms drive a pair of rotating rods to rotate. Since the rotating rods are provided with threads with opposite rotation directions, the first base plate and the second base plate are driven to move closer to each other, and the first fixing frame and the second fixing frame are driven to move closer to each other. The first pressure plates on both sides press and fix the front end flange and the corresponding pipe body, and the second pressure plates on both sides press and fix the rear end flange and the corresponding pipe body, thereby realizing the connection between the butterfly valve and the pipe body in an automated manner, further improving the installation efficiency, and eliminating the cumbersome manual operation of the staff. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the utility model from a side view;

[0016] Figure 2 It is a schematic diagram of a partial cross-sectional structure of the utility model from a side perspective;

[0017] Figure 3 It is a structural schematic diagram of the first fixing frame and the second fixing frame in the utility model.

[0018] Meanings of the numbers in the figure: 11, valve body; 111, valve plate; 112, valve stem; 113, front end flange; 114, rear end flange; 2, bracket; 21, battery box; 22, handle; 31, first fixing frame; 311, first clamping plate; 312, first connecting plate; 313, first base plate; 32, second fixing frame; 321, second clamping plate; 322, second connecting plate; 323, second base plate; 4, rotating rod; 51, first connecting part; 511, first screw hole; 52, second connecting part; 521, second screw hole; 6, guide rod; 71, first limiting part; 711, first sliding hole; 72, second limiting part; 721, second sliding hole; 8, motor; 91, first bevel gear; 92, second bevel gear. DETAILED DESCRIPTION

[0019] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed, but such modifications are protected by patent law as long as they are within the scope of the claims of the present invention.

[0020] See attached Figure 1-3, this embodiment disclosed by the utility model further provides: a pneumatic butterfly valve, which includes a cylinder and a valve body 11. Front flange 113 and rear flange 114 are provided at both ends of the valve body 11. A valve plate 111 and a valve stem 112 are provided inside the valve body 11. The cylinder is connected with an air pipe, and the output end of the cylinder is connected with the valve stem 112. A bracket 2 is fixed between the cylinder and the valve body 11;

[0021] It also includes that two first fixing brackets 31 and two second fixing brackets 32 are respectively provided on both sides of both ends of the valve body 11. Both the first fixing bracket 31 and the second fixing bracket 32 are in a U shape. The first fixing bracket 31 includes a first pressing plate, a first connecting plate 312 and a first base plate 313. The first pressing plate is arranged parallel to the front flange 113. The second fixing bracket 32 includes a second pressing plate, a second connecting plate 322 and a second base plate 323. The second pressing plate is arranged parallel to the rear flange 114. A pair of rotating rods 4 are provided on both sides between the front flange 113 and the rear flange 114. The rotating rod 4 is provided with external threads with opposite helix directions with the midpoint as the boundary. An arc-shaped first connecting portion 51 is provided above the first base plate 313. The first connecting portion 51 is provided with a first screw hole 511 and is connected with the corresponding rotating rod 4. An arc-shaped second connecting portion 52 is provided above the second base plate 323. The second connecting portion 52 is provided with a second screw hole 521 and is connected with the corresponding rotating rod 4;

[0022] A guide rod 6 is further provided between the front flange 113 and the rear flange 114. An arc-shaped first limiting portion 71 is provided below the first base plate 313. The first limiting portion 71 is provided with a first sliding hole 711 and is slidably connected with the guide rod 6. An arc-shaped second limiting portion 72 is provided below the second base plate 323. The second limiting portion 72 is provided with a second sliding hole 721 and is slidably connected with the guide rod 6;

[0023] It also includes a pair of driving mechanisms for driving a pair of rotating rods 4 to rotate. Specifically, the driving mechanism includes a motor 8, a first bevel gear 91 and a second bevel gear 92. The motor 8 is fixed on the bracket 2. The first bevel gear 91 is fixed on the output shaft of the motor 8. The second bevel gear 92 is fixed on the corresponding rotating rod 4. The first bevel gear 91 is meshed and connected with the second bevel gear 92;

[0024] Further, a battery box 21 is provided on the bracket 2. The battery box 21 is provided with a detachable battery. The motor 8 is electrically connected with the battery box 21.

[0025] Further, horizontal extending handles 22 are provided on both sides of the bracket 2. When aligning the front flange 113 and the rear flange 114 with the corresponding pipe body, they are held through the handles 22 on both sides, which improves the portability.

[0026] The principle of the utility model is as follows: when the butterfly valve needs to be installed on the pipe body, the front end flange 113 and the rear end flange 114 are aligned with the corresponding pipe body, and the pipe bodies at both ends are respectively located between the first pressing plate and the front end flange 113 and between the second pressing plate and the rear end flange 114, and the motor 8 is turned on, and the output shaft rotates to drive the first bevel gear 91 to rotate, thereby driving the second bevel gear 92 to rotate, and driving the rotating rod 4 to rotate. Since the rotating rod 4 is provided with threads with opposite rotation directions, the first base plate 313 and the second base plate 323 are driven to move closer to each other, and the first fixing frame 31 and the second fixing frame 32 are driven to move closer to each other. Furthermore, the first limiting portion 71 and the second limiting portion 72 slide, and play a role of limiting and guiding the first fixing frame 31 and the second fixing frame 32, thereby improving stability.

[0027] After the first fixing frame 31 and the second fixing frame 32 move closer to each other, the first pressure plates on both sides press and fix the front end flange 113 to the corresponding pipe body, and the second pressure plates on both sides press and fix the rear end flange 114 to the corresponding pipe body, thereby realizing the connection between the butterfly valve and the pipe body in an automated manner, further improving the installation efficiency and eliminating the tedious manual operation of the staff.

[0028] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications of the above assumptions should also be regarded as the protection scope of the present invention.

Claims

1. A pneumatic butterfly valve, comprising a cylinder and a valve body (11), wherein the valve body (11) is provided with a front flange (113) and a rear flange (114) at both ends, wherein a valve plate (111) and a valve stem (112) are provided inside the valve body (11), wherein the output end of the cylinder is connected to the valve stem (112), wherein: A bracket (2) is fixed between the cylinder and the valve body (11). On both sides of the two ends of the valve body (11), two first fixing brackets (31) and two second fixing brackets (32) are respectively provided. The first fixing brackets (31) and the second fixing brackets (32) are both in a U shape. The first fixing bracket (31) includes a first pressing plate, a first connecting plate (312) and a first base plate (313). The first pressing plate is arranged parallel to the front flange (113). The second fixing bracket (32) includes a second pressing plate, a second connecting plate (322) and a second base plate (323). The second pressing plate is arranged parallel to the rear flange (114). On both sides between the front flange (113) and the rear flange (114), a pair of rotating rods (4) are provided. The rotating rods (4) are provided with external threads with opposite helix directions with the midpoint as the boundary. Above the first base plate (313), a first connecting part (51) is provided. The first connecting part (51) is provided with a first screw hole (511) and is connected to the corresponding rotating rod (4). Above the second base plate (323), a second connecting part (52) is provided. The second connecting part (52) is provided with a second screw hole (521) and is connected to the corresponding rotating rod (4); It further includes a pair of driving mechanisms for driving the pair of rotating rods (4) to rotate.

2. A pneumatic butterfly valve according to claim 1, characterized in that: The driving mechanism includes a motor (8), a first bevel gear (91) and a second bevel gear (92). The motor (8) is fixed on the bracket (2). The first bevel gear (91) is fixed on the output shaft of the motor (8). The second bevel gear (92) is fixed on the corresponding rotating rod (4). The first bevel gear (91) is meshed and connected with the second bevel gear (92).

3. A pneumatic butterfly valve according to claim 1, characterized in that: A guide rod (6) is further provided between the front flange (113) and the rear flange (114). Below the first base plate (313), a first limiting part (71) is provided. The first limiting part (71) is provided with a first sliding hole and is slidably connected with the guide rod (6). Below the second base plate (323), a second limiting part (72) is provided. The second limiting part (72) is provided with a second sliding hole and is slidably connected with the guide rod (6).

4. A pneumatic butterfly valve according to claim 2, characterized in that: A battery box (21) is provided on the bracket (2). The motor (8) is electrically connected with the battery box (21).

5. The pneumatic butterfly valve according to claim 1, characterized in that: On both sides of the bracket (2), grips (22) extending horizontally are provided.

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