CN210123019U

CN210123019U - Pneumatic butterfly valve

Info

Publication number: CN210123019U
Application number: CN201920732775.6U
Authority: CN
Inventors: 翁正银; 刘春梅
Original assignee: Zhejiang Suzheng Automatic Control Valve Co Ltd
Current assignee: Zhejiang Suzheng Automatic Control Valve Co Ltd
Priority date: 2019-05-21
Filing date: 2019-05-21
Publication date: 2020-03-03
Anticipated expiration: 2029-05-21

Abstract

The utility model belongs to the technical field of pneumatic butterfly valves, in particular to a pneumatic butterfly valve, which comprises a water pipe, a turning plate, an impurity box and a pneumatic actuator, wherein the inner wall of the water pipe is fixedly connected with a first sealing layer, the inside of the water pipe is fixedly connected with a filter screen, the two ends of the water pipe are fixedly connected with flanges, and the flanges are provided with connecting holes; when using this device, drive the valve rod through pneumatic actuator and rotate and open and turn over the board, the fluid will be followed water pipe input end flow direction water pipe output, can pass through the filtration of filter screen when the fluid is at the water pipe output, make the impurity in the fluid blockked by the filter screen, then fall into the impurity incasement along with the effect of gravity, when impurity in the impurity incasement piles up the certain degree, people can open the screw thread and end the outside that the valve discharges the device to the impurity in the impurity incasement, can effectually prevent that impurity from entering into between first sealing layer and the second sealing layer, thereby influence the leakproofness between the sealing layer.

Description

Pneumatic butterfly valve

Technical Field

The utility model relates to a pneumatic butterfly valve specifically is a pneumatic butterfly valve.

Background

The pneumatic butterfly valve consists of a pneumatic actuator and a butterfly valve. The pneumatic butterfly valve is opened and closed by a circular butterfly plate rotating along with a valve rod to realize the pneumatic valve which starts to act, is mainly used as a cut-off valve, can also be designed to have the function of adjusting or adjusting a section valve, and is increasingly used on low-pressure large-and medium-caliber pipelines at present. Classifying a pneumatic butterfly valve: stainless steel pneumatic butterfly valves, hard seal pneumatic butterfly valves, soft seal pneumatic butterfly valves, carbon steel pneumatic butterfly valves. The main advantage of pneumatic butterfly valve, moreover, the steam generator is simple in structure, small light in weight, the cost is low, this characteristics of pneumatic butterfly valve are especially showing, install at the high altitude blind track, through two-position five-way solenoid valve control convenient operation, also adjustable flow medium, pneumatic butterfly valve's main advantage, moreover, the steam generator is simple in structure, small light in weight, the cost is low, this characteristics of pneumatic butterfly valve are especially showing, install at the high altitude blind track, through two-position five-way solenoid valve control convenient operation, also adjustable flow medium, pneumatic butterfly valve no matter all has good sealing performance under the low temperature condition, however, the valve is closed untight when current pneumatic butterfly valve uses, cause the fluid seepage, waste resources: therefore, the existing pneumatic butterfly valve has the problem of poor sealing performance.

Therefore, chinese patent discloses a pneumatic butterfly valve (application No. cn201811048960. x), which can increase the sealing performance and pressure resistance of the butterfly valve, but the device cannot filter impurities in the fluid when in use, which may cause some impurities to enter between the sealing layers when the valve is closed, and the sealing performance of the butterfly valve may be affected for a long time. Accordingly, one skilled in the art has provided a pneumatic butterfly valve to solve the problems set forth in the background above.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a pneumatic butterfly valve to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme:

a pneumatic butterfly valve comprises a water pipe, a turning plate, an impurity box and a pneumatic actuator, wherein a first sealing layer is fixedly connected to the inner wall of the water pipe, a filter screen is fixedly connected to the inner part of the water pipe, flanges are fixedly connected to the two ends of the water pipe, connecting holes are formed in the flanges, a supporting seat is fixedly connected to the outer wall of the water pipe, the turning plate is rotatably connected with the water pipe, a valve rod is fixedly connected to the turning plate, the bottom end of the valve rod is rotatably connected with the supporting seat, a second sealing layer is fixedly connected to the periphery of the outer wall of the turning plate, the impurity box is fixedly connected with the outer wall of the water pipe, a screw thread stop valve is connected to the bottom of the impurity box, a first baffle is fixedly connected to the top of the impurity box, a second baffle is fixedly connected to the, the pneumatic actuator is connected with an external air source.

As a further aspect of the present invention: the first sealing layer and the second sealing layer are matched in size direction, and the first sealing layer and the second sealing layer are in transition fit.

As a further aspect of the present invention: the number of the connecting holes is a plurality of, the connecting holes are evenly distributed on the flanges, and the flanges are symmetrically distributed on two sides of the water pipe.

As a further aspect of the present invention: the turning plate is cylindrical, and the valve rod is connected to the position of the circle center line of the turning plate.

As a further aspect of the present invention: the outer wall of the turning plate is provided with an anti-corrosion layer, and the anti-corrosion layer is fixedly connected with the turning plate.

As a further aspect of the present invention: the discharge hole shape is circular, just the screw thread stop valve is located under the discharge hole.

As a further aspect of the present invention: the first baffle is rectangular in shape, the first baffle is installed on one side far away from the filter screen, and the second baffle is located below the first baffle and close to one side of the filter screen.

Compared with the prior art, the beneficial effects of the utility model are that:

1. when using this device, drive the valve rod through pneumatic actuator and rotate and open and turn over the board, the fluid will be followed water pipe input end flow direction water pipe output, can pass through the filtration of filter screen when the fluid is at the water pipe output, make the impurity in the fluid blockked by the filter screen, then fall into the impurity incasement along with the effect of gravity, when impurity in the impurity incasement piles up the certain degree, people can open the screw thread and end the outside that the valve discharges the device to the impurity in the impurity incasement, can effectually prevent that impurity from entering into between first sealing layer and the second sealing layer, thereby influence the leakproofness between the sealing layer.

2. When using this device, when impurity enters into the inside of impurity case, the cooperation between first baffle and the second baffle can prevent to have too much contact between impurity and the fluid, but also can play a effect of blockking to the impurity that gets into the impurity case, prevents that impurity from being given by fluidic motion and taking out the impurity case.

Drawings

FIG. 1 is a schematic structural diagram of a pneumatic butterfly valve;

FIG. 2 is a schematic structural diagram of a flange and a flap in a pneumatic butterfly valve;

FIG. 3 is a schematic structural diagram of a filter screen in a pneumatic butterfly valve;

FIG. 4 is a schematic structural view of a housing and a foreign matter box in a pneumatic butterfly valve;

FIG. 5 is a schematic view of a configuration of a contaminant trap in a pneumatic butterfly valve;

fig. 6 is a side view of a contaminant trap in a pneumatic butterfly valve.

In the figure: 1. a water pipe; 11. a first sealing layer; 12. filtering with a screen; 13. a flange; 131. connecting holes; 14. a supporting seat; 2. turning over a plate; 21. a valve stem; 22. a second sealing layer; 23. an anti-corrosion layer; 3. an impurity box; 31. a threaded stop valve; 32. a first baffle plate; 321. a second baffle; 33. a discharge hole; 4. and a pneumatic actuator.

Detailed Description

Referring to fig. 1 to 6, in an embodiment of the present invention, a pneumatic butterfly valve includes a water pipe 1, a turning plate 2, an impurity box 3, and a pneumatic actuator 4, a first sealing layer 11 is fixedly connected to an inner wall of the water pipe 1, a filter screen 12 is fixedly connected to an inner portion of the water pipe 1, flanges 13 are fixedly connected to two ends of the water pipe 1, a connecting hole 131 is formed in the flange 13, a supporting seat 14 is fixedly connected to an outer wall of the water pipe 1, the turning plate 2 is rotatably connected to the water pipe 1, a valve rod 21 is fixedly connected to the turning plate 2, a bottom end of the valve rod 21 is rotatably connected to the supporting seat 14, a second sealing layer 22 is fixedly connected to a periphery of an outer wall of the turning plate 2, the impurity box 3 is fixedly connected to an outer wall of the water pipe 1, a thread stop valve 31 is connected to a bottom of the impurity box, the valve rod 21 is fixedly connected with the output end of the pneumatic actuator 4, and the pneumatic actuator 4 is connected with an external air source.

In fig. 1: 1 both ends fixedly connected with flange 13 of water pipe, connecting hole 131 has been seted up on flange 13, turn over board 2 and water pipe 1 and rotate and be connected, turn over fixedly connected with valve rod 21 on the board 2,

valve rod

21 and 4 output end fixed connection of pneumatic actuator, connect outside equipment through connecting hole 131 on the flange 13 when using, then drive the rotation of valve rod 21 through pneumatic actuator 4, thereby drive the rotation that turns over board 2 through valve rod 21, open the butterfly valve and make the fluid pass through.

In fig. 2: 1 inner wall fixedly connected with of water pipe 11 first sealing layer 11, turn over 2 outer walls of board fixedly connected with second sealing layer 22 all around, turn over 2 outer walls of board and be equipped with anti-corrosion coating 23, anti-corrosion coating 23 with turn over 2 fixed connection of board, turn over 2 shapes of board and be cylindrical, valve rod 21 is connected and is turning over 2 centre of a circle linear positions, first sealing layer 11 returns and cooperates with second sealing layer 22 when closing the butterfly valve, prevent that the fluid from passing through, can play the effect of a protection to turning over board 2 through anti-corrosion coating 23, prevent to turn over board 2 and receive oxidation and corruption.

In fig. 3: the filter screen 12 is fixedly connected to the inner portion of the water pipe 1, impurities in fluid can be filtered through the filter screen 12, the impurities in the fluid cannot flow out of the turning plate 2 of the device, and the impurities are prevented from being clamped between the first sealing layer 11 and the second sealing layer 22 when the turning plate 2 is closed.

In fig. 4: 3 bottom threaded connection of impurity case has screw thread stop valve 31, opens screw thread stop valve 31 and can be to the impurity discharge outside of device in the

impurity case

3, 1 outer wall fixedly connected with supporting seat 14 of water pipe, and valve rod 21 bottom is rotated with supporting seat 14 and is connected, and when valve rod 21 time pneumatic actuator 4 drove, supporting seat 14 can play the effect of a support to valve rod 21, can let the more stable of operation of valve rod 21.

In fig. 5: 3 first baffles 32 of top fixedly connected with of impurity case, discharge opening 33 has been seted up to 3 bottoms of impurity case, and discharge opening 33 shape is circular, and screw thread stop valve 31 is located under discharge opening 33, and the inside impurity of the impurity case of being convenient for flows out to the outside in entering into screw thread stop valve 31 through discharge opening 33, and screw thread stop valve 31 is convenient for people's use moreover, and the inside fluid of can effectual prevention device leaks out when using.

In fig. 6: impurity case 3 inner wall fixedly connected with second baffle 321, first baffle 32 shape is the rectangle, and first baffle 32 is installed in the one side of keeping away from filter screen 12, second baffle 321 is located the one side that first baffle 32 below is close to filter screen 12, cooperation between first baffle 32 and the second baffle 321 can prevent to have too much contact between impurity and the fluid, can make impurity can not be given by fluidic motion and take out impurity case 3, and can also play a effect that stops to the impurity that gets into impurity case 3.

The utility model discloses a theory of operation is: when the device is used, the valve rod 21 is driven to rotate by the pneumatic actuator 4 to open the turning plate 2, fluid flows from the input end of the water pipe 1 to the output end of the water pipe 1, the fluid is filtered by the filter screen 12 when the fluid is at the output end of the water pipe 1, impurities in the fluid are blocked by the filter screen 12 and then fall into the impurity box 3 along with gravity, when the impurities in the impurity box 3 are accumulated to a certain degree, people can open the screw thread stop valve 31 to discharge the impurities in the impurity box 3 to the outside of the device, the impurities can be effectively prevented from entering between the first sealing layer 11 and the second sealing layer 22, the sealing performance between the sealing layers is affected, the screw thread stop valve 31 is convenient for people to use, the fluid in the device can be effectively prevented from leaking out when in use, the impurities in the impurity box 3 can be blocked by the first baffle 32 and the second baffle 321, prevent that there is too much contact between the impurity in the impurity case 3 and the outside fluid that flows, prevent that impurity from being given by fluidic motion and taking out impurity case 3 outside, but also can play a effect that stops to the impurity that gets into impurity case 3 through first baffle 32 and second baffle 321, more make things convenient for people's use.

Claims

1. A pneumatic butterfly valve comprises a water pipe (1), a turning plate (2), an impurity box (3) and a pneumatic actuator (4), and is characterized in that a first sealing layer (11) is fixedly connected to the inner wall of the water pipe (1), a filter screen (12) is fixedly connected to the inner part of the water pipe (1), flanges (13) are fixedly connected to the two ends of the water pipe (1), a connecting hole (131) is formed in each flange (13), a supporting seat (14) is fixedly connected to the outer wall of the water pipe (1), the turning plate (2) is rotatably connected with the water pipe (1), a valve rod (21) is fixedly connected to the turning plate (2), the bottom end of the valve rod (21) is rotatably connected with the supporting seat (14), a second sealing layer (22) is fixedly connected to the periphery of the outer wall of the turning plate (2), and the impurity box (3) is fixedly connected with the outer wall of the, impurity case (3) bottom threaded connection has screw thread stop valve (31), first baffle of impurity case (3) top fixedly connected with (32), impurity case (3) inner wall fixedly connected with second baffle (321), discharge opening (33) have been seted up to impurity case (3) bottom, valve rod (21) with pneumatic actuator (4) output fixed connection, pneumatic actuator (4) are connected with outside air supply.

2. A pneumatic butterfly valve according to claim 1, characterised in that said first sealing layer (11) is dimensionally congruent with said second sealing layer (22) and in that said first sealing layer (11) is in transition fit with said second sealing layer (22).

3. A pneumatic butterfly valve according to claim 1, characterised in that said connection holes (131) are several in number and are uniformly distributed on said flange (13), said flange (13) being symmetrically distributed on both sides of said water pipe (1).

4. A pneumatic butterfly valve according to claim 1, characterised in that said flap (2) is cylindrical in shape and in that said stem (21) is connected at the centre line of said flap (2).

5. A pneumatic butterfly valve according to claim 1, characterised in that the outer wall of the flap (2) is provided with a corrosion protection layer (23), the corrosion protection layer (23) being fixedly connected to the flap (2).

6. A pneumatic butterfly valve according to claim 1, characterised in that the outlet opening (33) is circular in shape and the threaded shut-off valve (31) is located directly below the outlet opening (33).

7. A pneumatic butterfly valve according to claim 1, characterised in that said first flap (32) is rectangular in shape and in that said first flap (32) is mounted on the side remote from said sieve (12) and in that said second flap (321) is located on the side close to said sieve (12) below said first flap (32).