Pneumatic butterfly valve

Abstract

The utility model belongs to the technical field of pneumatic butterfly valves, and particularly relates to a pneumatic butterfly valve which comprises a valve body and an electric actuator, the electric actuator is fixedly connected with the top of the valve body, the output end of the electric actuator is fixedly connected with a valve rod, the valve rod is rotatably connected with the inner wall of the valve body, a channel corresponding to the valve rod is arranged on the valve body, and the valve rod is fixedly connected with the valve body. A through opening is formed in the bottom of the valve body, a valve seat is fixedly connected into the through opening, the end, located in the valve seat, of the valve rod is fixedly sleeved with a valve plate, the end, close to the electric actuator, of the valve rod is rotationally sleeved with an O-shaped ring and two symmetrically-arranged short sealing sleeves, and the outer portions of the O-shaped ring and the short sealing sleeves abut against the inner wall of the channel. Due to the arrangement of multiple sealing structures, the sealing performance of the pneumatic butterfly valve can be effectively improved, and therefore the using effect of the pneumatic butterfly valve is effectively guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to pneumatic butterfly valve technical field especially relates to pneumatic butterfly valve. BACKGROUND

[0002] Pneumatic butterfly valve is by pneumatic actuator and butterfly valve composition. Pneumatic butterfly valve is with the circular butterfly plate that rotates with valve rod 3 and does the on-off nature to realize the action of opening and using the pneumatic valve, mainly does the cutting valve use, also can be designed into the function that has the adjustment or section valve and adjustment, the current butterfly valve uses more and more on low pressure big medium caliber pipeline. Pneumatic butterfly valve classification: stainless steel pneumatic butterfly valve, hard sealing pneumatic butterfly valve, soft sealing pneumatic butterfly valve, carbon steel pneumatic butterfly valve. The main advantages of pneumatic butterfly valve, simple structure, small volume and light weight, low cost, pneumatic butterfly valve the characteristics are especially remarkable, install in high altitude dark way, pass through two position five way solenoid valve control operation is convenient, also can adjust flow medium.

[0003] But the existing pneumatic butterfly valve composition structure is relatively simple, and the pneumatic butterfly valve lacks a certain sealing structure, thereby affecting the use effect of the pneumatic butterfly valve. UTILITY MODEL CONTENT

[0004] The utility model discloses a pneumatic butterfly valve to solve the problem that the pneumatic butterfly valve lacks a certain sealing structure in the background art.

[0005] In order to achieve the above object, the utility model adopts the following technical scheme:

[0006] Pneumatic butterfly valve, including valve body and electric actuator, the electric actuator is fixedly connected with the top of valve body, the output end of electric actuator is fixedly connected with valve rod, the valve rod is rotatably connected with the inner wall of valve body, the valve body is equipped with the passageway corresponding with valve rod, the bottom of valve body is equipped with the pass, the pass is fixedly connected with valve seat in, one end of valve rod in valve seat is fixedly sleeved with valve plate, the end of valve rod close to electric actuator rotatably sleeved with O type ring and two symmetrical short sealing sleeves, the outside of O type ring and short sealing sleeve all is with passageway inner wall, the both ends of valve rod close to valve plate rotatably sleeved with long sealing sleeve, the outside of long sealing sleeve is with the inner wall of valve seat.

[0007] Preferably, the electric actuator and the top of the valve body are fixedly connected by a plurality of fastening bolts.

[0008] Preferably, the top of the valve rod rotatably sleeved with the clamping plate, the clamping plate is fixedly connected with the top of the valve body by the locking screw.

[0009] Preferably, a plurality of fastening ports are arranged on the outer wall of the valve body close to one end of the passageway.

[0010] Preferably, the long sealing sleeve and the short sealing sleeve are both made of PTEE material.

[0011] Preferably, the valve seat is made of EPDM material.

[0012] Compared with the prior art, the utility model has the advantages of the following beneficial effects:

[0013] In the utility model, the sealing property of the pneumatic butterfly valve is effectively improved through the arrangement of multiple sealing structures, so that the use effect of the pneumatic butterfly valve is effectively ensured. BRIEF DESCRIPTION OF DRAWINGS

[0014] Fig. 1 The utility model discloses a structure diagram of a pneumatic butterfly valve.

[0015] Fig. 2 The utility model discloses a structure diagram of a pneumatic butterfly valve.

[0016] In the drawing: 1 valve body, 2 electric actuator, 3 valve rod, 4 valve seat, 5 valve plate, 6 O ring, 7 short sealing sleeve, 8 long sealing sleeve, 9 fastening bolt, 10 clamping plate, 11 locking screw, 12 fastening mouth. DETAILED DESCRIPTION

[0017] The technical scheme in the embodiments of the utility model will be apparently and completely described below with reference to the drawings in the embodiments of the utility model, and obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments.

[0018] Referring to Figs. 1-2 , a pneumatic butterfly valve, including valve body 1 and electric actuator 2, electric actuator 2 is connected with the top of valve body 1 fixedly, and the outer wall of the one end of valve body 1 close to the passage is equipped with a plurality of fastening mouth 12, and electric actuator 2 is connected with the top of valve body 1 fixedly through a plurality of fastening bolt 9, which facilitates the installation and fixation of electric actuator 2, and the top of valve rod 3 is rotatably sleeved with clamping plate 10, and clamping plate 10 is fixedly connected with the top of valve body 1 through locking screw 11, which prevents valve rod 3 from shaking;

[0019] In this embodiment, the output end of electric actuator 2 is fixedly connected with valve rod 3, which is used to drive valve plate 5 to rotate, and valve rod 3 is rotatably connected with the inner wall of valve body 1, and valve body 1 is equipped with a passage corresponding to valve rod 3, and the bottom of valve body 1 is equipped with a through port, and valve seat 4 is fixedly connected in the through port, and valve seat 4 is made of EPDM material.

[0020] In this embodiment, one end of valve rod 3, located in valve seat 4, is fixedly sleeved with valve plate 5, which is used to control medium flow, and the end of valve rod 3 close to electric actuator 2 is rotatably sleeved with O ring 6 and two symmetrical short sealing sleeves 7, which guarantees the sealing property of the top of valve rod 3, and the outside of O ring 6 and short sealing sleeve 7 is in abutment with the inner wall of the passage.

[0021] In the embodiment, the valve stem 3 is sleeved with a long sealing sleeve 8 near both ends of the valve plate 5, the outer part of the long sealing sleeve 8 abuts against the inner wall of the valve seat 4, the sealing property of the bottom of the valve stem 3 is ensured, and the long sealing sleeve 8 and the short sealing sleeve 7 are both made of PTEE material.

[0022] In the embodiment, the sealing property of the pneumatic butterfly valve is effectively improved through the arrangement of multiple sealing structures, so that the use effect of the pneumatic butterfly valve is effectively ensured.

[0023] The above is only the preferred specific implementation of the present application, but the protection scope of the present application is not limited to this, any skilled person in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A pneumatic butterfly valve, comprising a valve body (1) and an electric actuator (2), characterized in that: The electric actuator (2) is fixedly connected to the top of the valve body (1). The output end of the electric actuator (2) is fixedly connected to the valve stem (3). The valve stem (3) is rotatably connected to the inner wall of the valve body (1). The valve body (1) is provided with a channel corresponding to the valve stem (3). The bottom of the valve body (1) is provided with a through-hole. The through-hole is fixedly connected to the valve seat (4). One end of the valve stem (3) located in the valve seat (4) is fixedly sleeved with a valve plate (5). One end of the valve stem (3) near the electric actuator (2) is rotatably sleeved with an O-ring (6) and two symmetrically arranged short sealing sleeves (7). The outer sides of the O-ring (6) and the short sealing sleeves (7) abut against the inner wall of the channel. Both ends of the valve stem (3) near the valve plate (5) are rotatably sleeved with long sealing sleeves (8). The outer side of the long sealing sleeves (8) abuts against the inner wall of the valve seat (4).

2. The pneumatic butterfly valve according to claim 1, characterized in that: The electric actuator (2) is fixedly connected to the top of the valve body (1) by a plurality of fastening bolts (9).

3. The pneumatic butterfly valve according to claim 1, characterized in that: The valve stem (3) is rotatably sleeved with a retaining plate (10), which is fixedly connected to the top of the valve body (1) by a locking screw (11).

4. The pneumatic butterfly valve according to claim 1, characterized in that: The valve body (1) has multiple fastening ports (12) on the outer wall near one end of the channel.

5. The pneumatic butterfly valve according to claim 1, characterized in that: Both the long sealing sleeve (8) and the short sealing sleeve (7) are made of PTEE material.

6. The pneumatic butterfly valve according to claim 1, characterized in that: The valve seat (4) is made of EPDM material.

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