CN219366830U - Pneumatic eccentric expansion butterfly valve - Google Patents

Abstract

The utility model belongs to the technical field of butterfly valves, especially a pneumatic eccentric expansion butterfly valve. Aiming at the problem that the opening device of the existing butterfly valve lacks a positioning structure, so that the sealing stability cannot be guaranteed, the following scheme is proposed, which includes the butterfly valve body, The butterfly valve body includes a frame and a valve plate. A rotating rod is installed on the bottom inner wall of the frame. The valve plate is fixedly sleeved on the outside of the rotating rod, and a worm gear is fixedly installed on the top of the rotating rod. The same worm is rotatably installed on the inner walls of the front and rear sides of the frame, and the worm meshes with the worm wheel. Two guide plates are fixedly installed on the front side of the frame body. The utility model has a reasonable structural design, and fixes the turntable by arranging a positioning component on the butterfly valve body, thereby ensuring the sealing performance of the butterfly valve, and is convenient to control the switch of the butterfly valve, and has high reliability.

Description

A pneumatic eccentric expansion butterfly valve

technical field

The utility model relates to the technical field of butterfly valves, in particular to a pneumatic eccentric expansion butterfly valve.

Background technique

High-performance butterfly valve sealing rings are usually made of PTFE. Because of their excellent sealing performance, reliable service life and cost-effectiveness, they are widely used in the field of industrial automation and control. Especially in petroleum, chemical industry, electric power, air separation, high-rise buildings, water treatment and other industries, the application is very mature.

The prior art discloses that the application number is: CN210372050U discloses a pneumatic expansion butterfly valve. This utility model is provided with a manual actuator. Through the engagement of the driving gear and the driven gear on the manual actuator, it can facilitate the staff to manually Turn the handle to avoid the situation that the pneumatic actuator cannot work due to accidents and the butterfly valve loses control, which can further improve the staff's control over the pneumatic expansion butterfly valve. The friction force between the valve seat and the valve seat when the plate opens and closes, thereby improving the service life of the valve seat and improving the sealing performance of the expansion butterfly.

However, in the process of realizing the embodiment of the present invention, the inventor found that there are at least the following defects in the background technology: the opening device of the existing butterfly valve lacks a positioning structure, so that the sealing stability cannot be guaranteed, so we propose a pneumatic eccentric expansion Butterfly valve to solve this problem.

Utility model content

The purpose of this utility model is to solve the problems raised in the background technology above, and propose a pneumatic eccentric expansion butterfly valve.

In order to achieve the above object, the utility model adopts the following technical solutions:

A pneumatic eccentric expansion butterfly valve, including a butterfly valve body, the butterfly valve body includes a frame and a valve plate, a rotating rod is installed on the bottom inner wall of the frame, and the valve plate is fixedly sleeved on the outside of the rotating rod , the top of the rotating rod is fixedly installed with a worm wheel, and the same worm is installed on the inner walls of the front and rear sides of the frame, and the worm meshes with the worm wheel, and the front end of the worm is fixedly installed with a turntable, so The front side of the turntable is provided with a round hole, the front side of the frame body is fixedly equipped with two guide plates, the outer sliding sleeves of the two guide plates are provided with the same moving plate, and the front side of the moving plate is fixed A round rod is installed, and the round rod is slidably installed in the round hole.

Preferably, the bottom of the moving plate is provided with a vertical groove, and a through hole is provided on the top inner wall of the vertical groove, a slide bar is slidably installed in the through hole, and a The fixing plate is provided with a limiting groove at the bottom of the fixing plate, and the sliding bar is movably clamped in the limiting groove.

Preferably, the same partition is fixedly installed between the inner walls of the left and right sides of the vertical groove, the top of the partition is provided with a sliding hole, and the bottom of the sliding rod is fixedly installed with a pull rod, and the pull rod is slidably installed on In the sliding hole, a pull handle is fixedly installed at the bottom end of the pull rod.

Preferably, a support spring is fixedly installed at the bottom end of the slide bar, the bottom end of the support spring is fixedly connected to the top of the partition, and the support spring is sleeved on the outside of the pull bar.

Preferably, a limit spring is fixedly installed on the rear side of the moving plate, and the rear end of the limit spring is fixedly connected to the front side of the frame.

Preferably, a plurality of anti-skid grooves are provided on the outer side of the turntable, and the plurality of anti-skid grooves are arranged at equal intervals.

In the utility model, the pneumatic eccentric expansion butterfly valve drives the pull bar and the slide bar to move downward together by pulling the handle downward, so that the slide bar breaks away from the limit groove, thereby releasing the movement restriction on the moving plate. Then move the pull handle backward, thereby driving the round rod to move backward, so that the round rod is separated from the rotating hole on the turntable, thereby releasing the restriction on the rotation of the turntable;

The utility model has a reasonable structural design, and fixes the turntable by arranging a positioning component on the butterfly valve body, thereby ensuring the sealing performance of the butterfly valve, and is convenient to control the switch of the butterfly valve, and has high reliability.

Description of drawings

Fig. 1 is a three-dimensional structural schematic diagram of a pneumatic eccentric expansion butterfly valve proposed by the utility model;

Fig. 2 is a schematic cross-sectional structure diagram of a pneumatic eccentric expansion butterfly valve proposed by the utility model;

FIG. 3 is a partially enlarged view of part A in FIG. 2 .

In the figure: 1. butterfly valve body; 2. frame; 3. valve plate; 4. rotating rod; 5. worm gear; 6. worm; 7. turntable; 8. guide plate; 11. Slide bar; 12. Fixed plate; 13. Pull rod; 14. Limit spring.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. example.

Referring to Figures 1-3, a pneumatic eccentric expansion butterfly valve includes a butterfly valve body 1. The butterfly valve body 1 includes a frame body 2 and a valve plate 3. A rotating rod 4 is installed on the bottom inner wall of the frame body 2, and the valve plate 3 is fixedly sleeved. On the outside of the rotating rod 4, the top of the rotating rod 4 is fixedly equipped with a worm wheel 5, and the inner walls of the front and rear sides of the frame body 2 are rotatably installed with the same worm 6, the worm 6 meshes with the worm wheel 5, and the front end of the worm 6 is fixedly installed with The turntable 7, the front side of the turntable 7 is provided with a round hole, the front side of the frame body 2 is fixedly equipped with two guide plates 8, the outer sliding sleeves of the two guide plates 8 are provided with the same moving plate 9, and the front side of the moving plate 9 A round bar 10 is fixedly installed on the side, and the round bar 10 is slidably installed in the round hole.

In the utility model, the bottom of the moving plate 9 is provided with a vertical groove, and the top inner wall of the vertical groove is provided with a through hole, a slide bar 11 is slidably installed in the through hole, and a fixed plate 12 is fixedly installed on the front side of the frame body 2. , The bottom of the fixed plate 12 is provided with a limiting groove, and the sliding rod 11 is movably engaged in the limiting groove, and the movement of the movable plate 9 is limited by the cooperation of the sliding rod 11 and the limiting groove.

In the utility model, the same partition is fixedly installed between the inner walls of the left and right sides of the vertical groove, the top of the partition is provided with a sliding hole, and the bottom of the sliding rod 11 is fixedly equipped with a pull rod 13, which is slidably installed in the sliding hole , The bottom end of the pull rod 13 is fixedly equipped with a pull handle, which is convenient for controlling the movement of the moving plate 9.

In the utility model, the bottom end of the slide bar 11 is fixedly equipped with a support spring, and the bottom end of the support spring is fixedly connected with the top of the partition, and the support spring is sleeved on the outside of the pull bar 13 to limit the position of the slide bar 11 .

In the utility model, the rear side of the moving plate 9 is fixedly installed with a limit spring 14, and the rear end of the limit spring 14 is fixedly connected with the front side of the frame body 2, and plays a position-limiting effect on the moving plate 9.

In the utility model, the outer side of the rotating disk 7 is provided with a plurality of anti-skid grooves, and the plurality of anti-skid grooves are arranged at equal intervals to prevent the rotating disk 7 from slipping.

In the utility model, when in use, by pulling the handle downward, the pull bar 13 and the slide bar 11 are driven to move downward together, so that the slide bar 11 breaks away from the limit groove, thereby releasing the movement restriction on the moving plate 9, and then moving Move the handle backward, thereby driving the moving plate 9 to move backward and compressing the limit spring 14, thereby driving the round rod 10 to move backward, so that the round rod 10 is separated from the rotating hole on the turntable 7, thereby releasing the restriction on the rotation of the turntable 7 , by rotating the turntable 7, thereby driving the worm 6 to rotate, thereby driving the worm wheel 5 and the rotating rod 4 to rotate together, controlling the rotation of the valve plate 3, thereby realizing the opening and closing control of the butterfly valve body.

Finally, it should be noted that: the above is only a preferred embodiment of the utility model, and is not intended to limit the utility model, although the utility model has been described in detail with reference to the foregoing embodiments, for those skilled in the art , it can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present utility model, All should be included within the protection scope of the present utility model.

Claims (6)

1. A pneumatic eccentric expansion butterfly valve, characterized in that it comprises a butterfly valve body (1), said butterfly valve body (1) comprising a frame (2) and a valve plate (3), the bottom inner wall of said frame (2) A rotating rod (4) is installed on the upper rotation, and the valve plate (3) is fixedly sleeved on the outside of the rotating rod (4), and a worm wheel (5) is fixedly installed on the top of the rotating rod (4). The same worm (6) is rotatably installed on the inner walls of the front and rear sides of the frame (2), and the worm (6) is engaged with the worm wheel (5), and the front end of the worm (6) is fixedly installed with a turntable ( 7), the front side of the turntable (7) is provided with a round hole, the front side of the frame (2) is fixedly installed with two guide plates (8), and the outer sides of the two guide plates (8) slide The same moving plate (9) is sleeved, and a round rod (10) is fixedly installed on the front side of the moving plate (9), and the round rod (10) is slidably installed in the round hole. 2. A kind of pneumatic eccentric expansion butterfly valve according to claim 1, characterized in that, the bottom of the moving plate (9) is provided with a vertical groove, and the top inner wall of the vertical groove is provided with a through hole, so that A slide bar (11) is slidably installed in the through hole, and a fixed plate (12) is fixedly installed on the front side of the frame body (2). The bottom of the fixed plate (12) offers a limit groove, and the slide bar (11) The activity is clamped in the limiting groove. 3. A pneumatic eccentric expansion butterfly valve according to claim 2, characterized in that the same partition is fixedly installed between the inner walls of the left and right sides of the vertical groove, and the top of the partition is provided with a sliding hole , the bottom of the slide bar (11) is fixed with a pull rod (13), the pull rod (13) is slidably installed in the slide hole, and the bottom end of the pull rod (13) is fixed with a pull handle. 4. A pneumatic eccentric expansion butterfly valve according to claim 3, characterized in that, the bottom end of the slide rod (11) is fixedly equipped with a support spring, and the bottom end of the support spring is in contact with the top of the partition Fixedly connected, the support spring is sleeved on the outside of the pull rod (13). 5. A pneumatic eccentric expansion butterfly valve according to claim 1, characterized in that a limit spring (14) is fixedly installed on the rear side of the moving plate (9), and the rear end of the limit spring (14) It is fixedly connected with the front side of the frame body (2). 6. A pneumatic eccentric expansion butterfly valve according to claim 1, characterized in that a plurality of anti-skid grooves are provided on the outer side of the turntable (7), and the plurality of anti-skid grooves are arranged at equal intervals.