KR200311759Y1 - Butterfly valve - Google Patents

Abstract

The present invention is made of a metal material is made of a portion of the sealing member is in contact with the valve body seat and the direct impact of the fluid to improve the durability and at the same time the sealing member is applied to the valve body seat by a pressure ring made of an elastic material The present invention relates to a butterfly valve of a new structure that can be pressurized to improve the airtightness of the valve.

According to the present invention, openings 210a and 210b are provided at least on both sides thereof and connected to a pipeline, and the valve body 210 having an annular valve body seat 212 protruding along the inner circumferential surface thereof, and the valve body 210 of the valve body 210. The disk-shaped valve disk 220 is rotatably mounted via a rotating shaft 232 therein to rotate the valve body 210 to open and close the valve body 210, and is coupled to the outer circumference of the valve disk 220 to In the butterfly valve comprising a sealing member (227, 250) in close contact with the valve body seat 212 at the time of shutoff, at least one of the sealing member (227, 250) is in contact with the valve body seat (212) The surface is surrounded by a metal sheet 251, the inner side of the metal sheet 251 is provided with an elastic pressure ring 252 for supporting the metal sheet 251 to be in close contact with the valve body sheet 212 Characterized by a butterfly valve is provided.

Description

Butterfly valve {Butterfly valve}

The present invention relates to a butterfly valve, and more particularly, a portion of the sealing member which is in contact with the valve body seat and a portion which is directly impacted by the fluid is made of a metal material to improve durability and at the same time the sealing member The present invention relates to a butterfly valve having a new structure that is capable of being press-contacted to the valve body seat by an elastic ring to improve the airtightness of the valve.

In general, the butterfly valve is a plate-shaped valve disk is installed in the valve body that is connected to the pipe line is to be opened and closed according to the rotation of the valve disk, as shown in Figure 1, the valve body An annular valve body sheet 111 protrudes from the inner circumferential surface of the 110, and a sealing member 125 that is in close contact with the valve body sheet 111 at the outer circumferential portion of the valve disc 120 adjacent to the valve body sheet 111. ) Is configured to maintain airtightness when the valve is closed.

In the conventional butterfly valve, the sealing member 125 is mainly made of a flexible elastic material such as rubber, the sealing member 125 made of such elastic material is excellent in adhesion with the valve body seat 111 of the valve Although there is an advantage in that the airtightness can be increased, it is very weak in terms of strength, and is easily broken due to friction with the valve body seat 111 due to frequent opening and closing operations, impact from the transfer fluid, foreign matter in the pipe, and the like. There was this.

On the other hand, due to its weakness in strength, a sealing member made of a metal material is also used. However, the metal sealing member is less elastic and flexible than a rubber material such as rubber, and has a high hardness, so that the sealing member is closely adhered to the valve body seat 111. There is a problem that the airtightness is worse when the valve is shut off because it can not but fall.

The present invention is to solve the problems as described above, the object of the present invention is the portion of the sealing member is in contact with the valve body seat and the portion directly applied by the fluid is made of a metal material can improve the durability At the same time, the sealing member is to provide a butterfly valve of a new structure that is to be in close contact with the valve body seat by the pressure ring of the elastic material to improve the airtightness of the valve.

1 is a cross-sectional view showing a conventional butterfly valve

Figure 2 is a side cross-sectional view showing an embodiment configuration of a butterfly valve according to the present invention

<Description of the symbols for the main parts of the drawings>

210: valve body 212: valve body seat

220: valve disc 222: support portion

223: rotating plate 227: first sealing member

228: fastening ring 230: valve actuator

250: second sealing member 251: metal sheet

252: pressure ring

According to the present invention, openings 210a and 210b are provided at least on both sides thereof and connected to a pipeline, and the valve body 210 having an annular valve body seat 212 protruding along the inner circumferential surface thereof, and the valve body 210 of the valve body 210. The disk-shaped valve disk 220 is rotatably mounted via a rotating shaft 232 therein to rotate the valve body 210 to open and close the valve body 210, and is coupled to the outer circumference of the valve disk 220 to In the butterfly valve comprising a sealing member (227, 250) in close contact with the valve body seat 212 at the time of shutoff, at least one of the sealing member (227, 250) is in contact with the valve body seat (212) The surface is surrounded by a metal sheet 251, the inner side of the metal sheet 251 is provided with an elastic pressure ring 252 for supporting the metal sheet 251 to be in close contact with the valve body sheet 212 Characterized by a butterfly valve is provided.

According to another feature of the present invention, the metal sheet 251 is hooked so that the inner peripheral portion is coupled to the valve disk 220 via the fastening ring 228 and the outer peripheral portion is in close contact with the valve body seat 212 It is made of an annular metal plate having a cross-sectional shape, the pressure ring 252 is provided with a butterfly valve, characterized in that inserted between the curled portion of the metal sheet 251 and the outer peripheral surface of the valve disk 220. .

The above objects, features and advantages will become more apparent from the following detailed description taken in conjunction with the accompanying drawings. Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Figure 2 is a cross-sectional view showing an embodiment configuration of a butterfly valve according to the present invention, in the present embodiment will be exemplarily described that the valve disk 220 is applied to the inclined butterfly valve installed inclined to one side.

As shown, the butterfly valve of the present invention includes a valve body 210 having openings 210a and 210b connected to pipe lines 10 and 10 'at both sides thereof, and rotating inside the valve body 210. A valve disk 220 installed to be capable of opening and closing the inside of the valve body 210 according to the rotation thereof, and a valve actuator 230 installed at one side of the valve body 210 to rotate the valve disk 220. It consists of.

In this embodiment, the flange portion 211 extends radially outward at both side openings 210a and 210b of the valve body 210 to form a bolt 9 at the flange portion 11 of the conduits 10 and 10 '. And a nut (8).

A rotating shaft 232 is rotatably installed at the central portion of the valve body 210 so as to traverse the inner central portion thereof, and the valve disc 220 is mounted to the rotating shaft 232 to rotate according to the rotation of the rotating shaft 232. Rotating integrally, the valve actuator 230 is fixedly installed outside the valve body 210 to be connected to one side of the rotating shaft 232. Here, the valve actuator 230 is a conventional one, although not shown, may be made of an automatic structure provided with an electric motor and a reducer for rotating the rotary shaft 232, or may be made of a structure provided with a manual handle. have.

An inner circumferential surface of the valve body 210 is provided with a valve body seat 212 adjacent to the outer circumference of the valve disc 220 protruding in an annular shape when the valve is blocked. In this embodiment, one side of the valve body seat 212 is biased toward one of the openings 210a of both side openings 210a and 210b of the valve body 210 and the other side of the valve body seat 212 is opposite to the opening of the valve body 210 ( Slanted toward 210b).

The valve disc 220 includes a support part 222 having a coupling hole 221 into which the rotation shaft 232 is inserted, a rotation plate 223 integrally formed with the support part 222, and the rotation plate 223. Consists of the first and second sealing members 227, 250 mounted in parallel at a predetermined interval in the outer peripheral portion, the rotating plate 223 is the radius of the valve body seat 212 the outer peripheral surface of the valve in the closing operation One side is inclined so as to be adjacent to the direction inner front end surface 212a and the other side is located to the right side than the rotation axis 232 to the left side.

The first and second sealing members 227 and 250 are detachably fixed to each other by a fastening ring 228 coupled to both sides of the rotating plate 223 via bolts 229, and the valve disc 220. The inner end surface 212a of the valve body seat 212 is formed of a curved surface having a predetermined curvature so that the first and second sealing members 227 and 250 slide smoothly during the rotation.

In addition, the first sealing member 227 has a unitary structure made of a high elastic material such as rubber, whereas the second sealing member 250 has an inner circumference thereof between the fastening ring 228 and the rotating plate 223. The metal sheet 251 is formed of an annular metal plate having a hooked cross-sectional shape, and the outer circumferential portion of the valve body seat 212 is rolled to be in close contact with the inner end surface 212a of the valve body seat 212. It is composed of a pressure ring 252 of a rubber material is inserted between the chamfered portion and the outer peripheral surface of the valve disk 220 to support the metal sheet 251 to be in close contact with the valve body seat 212, the of the metal sheet 251 In one surface, a protrusion 253 is inserted into the insertion hole 223a of the valve disc 220. At this time, it is preferable that the second sealing member 250 is installed to face the side to which the impact force by the fluid transferred from both sides of the valve disc 220 is more strongly applied.

Looking at the operation of the butterfly valve for the bidirectional feed pipe of the present invention configured as described above are as follows.

As the rotating shaft 232 is rotated in both directions by the valve actuator 230, the valve disc 220 is rotated to open and close the valve. That is, when the valve disk 220 is rotated so that the first and second sealing members 227 and 250 are spaced apart from the valve body seat 212, the valve may be opened to allow fluid to flow through the spaced gaps. When the outer circumferential portion of the valve disc 220 is adjacent to the valve body seat 212 of the valve body 210, the first and second sealing members 227 and 250 may have a front end surface 212a of the valve body seat 212. Close to the valve disc 220 to block fluid communication on both sides.

At this time, the airtightness between both sides of the valve disc 220 is maintained by the first sealing member 227 made of a rubber material, while the second sealing member 250 is in contact with the valve body seat 212 and Since the portion directly applied by the impact of the fluid is made of a metal sheet 251, and has a superior durability than the conventional sealing member made of rubber only against repeated opening and closing operations and the impact of the fluid being conveyed, the valve body Since the seat 212 is elastically supported by the pressure ring 252 of a rubber material, the seat 212 has better adhesion to the valve body seat 212 than the conventional metal sealing member, thereby increasing the airtightness of the valve. Therefore, in the butterfly valve of the present invention, not only the blockage of the conduit by the sealing members 227 and 250 is correctly made at the time of the shutoff operation of the valve, but also the durability of the sealing members 227 and 250 is remarkably improved so that frequent replacement is possible. Since there is no need, there is an advantage that the maintenance is easy.

Meanwhile, in the above-described embodiment, the present invention has been exemplarily described that the rotary plate 223 of the valve disc 220 is applied to an inclined butterfly valve formed to be inclined with respect to the rotating shaft, but the present invention is not limited thereto. In addition, the same applies to the conventional butterfly valve in which the rotating shaft 232 and the rotating plate 223 are formed in the same manner as in the above-described embodiment.

As described above, according to the present invention, the metal sheet 251 is covered on the outside of the sealing member 250 installed at the outer circumference of the valve disc 220 to provide durability against friction with the valve body seat 212 and impact by fluid. At the same time, a rubber ring presser 252 is installed between the metal seat 251 and the valve disc 220 of the sealing member 250 so that the metal seat 251 is pressed against the valve body seat 212. By constructing, the durability of the sealing member 250 can be improved to facilitate maintenance, and the airtightness can be improved to provide a butterfly valve having a new structure such that the shut-off operation can be accurately performed.

Claims (2)

Openings 210a and 210b connected to the conduit at least on both sides thereof are provided with a valve body 210 having an annular valve body sheet 212 protruding along the inner circumferential surface thereof, and a rotating shaft 232 inside the valve body 210. A disk-shaped valve disk 220 which is rotatably mounted to open and close the valve body 210, and is coupled to an outer circumference of the valve disk 220, and the valve is closed when the valve is blocked. In a butterfly valve including sealing members 227 and 250 in close contact with the body seat 212, at least one of the sealing members 227 and 250 may have a metal sheet having an outer surface contacting the valve body seat 212. 251 is surrounded by a butterfly, characterized in that the inner side of the metal sheet 251 is provided with an elastic pressure ring 252 for supporting the metal sheet 251 to be in close contact with the valve body seat 212 valve. The hook of claim 1, wherein the metal seat 251 is rolled such that an inner circumference thereof is coupled to the valve disc 220 via a fastening ring 228, and the outer circumference thereof is in close contact with the valve body seat 212. It is made of an annular metal plate having a shape, the pressure ring 252 is a butterfly valve, characterized in that inserted between the curled portion of the metal sheet 251 and the outer peripheral surface of the valve disk (220).