CN210218715U

CN210218715U - Bidirectional pressure-bearing soft sealing butterfly valve

Info

Publication number: CN210218715U
Application number: CN201920807012.3U
Authority: CN
Inventors: Dongshan Deng; 邓东山; Jiannan Tang; 唐建南; Anda Zhao; 赵安达; Ancheng Zhao; 赵安成
Original assignee: CHENGDA SPECIAL VALVE PLANT ZHEJIANG
Current assignee: CHENGDA SPECIAL VALVE PLANT ZHEJIANG
Priority date: 2019-05-30
Filing date: 2019-05-30
Publication date: 2020-03-31
Anticipated expiration: 2029-05-30

Abstract

The utility model discloses a bidirectional bearing soft seal butterfly valve, which comprises a valve body, wherein the top of the valve body is connected with a bracket through a bolt, a valve rod is arranged in the valve body and the bracket in a penetrating way, the top of the valve rod is connected with a hand wheel, the valve rod is connected with a butterfly plate arranged in the valve body through a pin, and the inner wall of the valve body is provided with a valve seat corresponding to the butterfly plate; the edge of the butterfly plate is provided with an annular groove, a first sealing gasket is embedded in the annular groove, the first sealing gasket is fixed in the annular groove through a pressing ring, and the pressing ring is fixed on the butterfly plate through screws; an annular mounting groove is formed in the valve seat, and a second sealing gasket matched with the first sealing gasket is embedded in the annular mounting groove; a plurality of flow guide channels communicated with the annular groove are formed in the side face of the butterfly plate, a guide pipe is in threaded connection with one end of each flow guide channel, which is opposite to the annular mounting groove, and a plurality of mounting holes matched with the guide pipes are formed in the inner side of the first sealing gasket. The utility model discloses can guarantee the sealing performance of valve, avoid the valve to take place to leak.

Description

Bidirectional pressure-bearing soft sealing butterfly valve

Technical Field

The utility model relates to a butterfly valve, especially a two-way pressure-bearing soft seal butterfly valve.

Background

A butterfly valve, also called a flap valve, is a regulating valve with a simple structure, can be used for the on-off control of low-pressure pipeline media, and refers to a valve which is opened and closed by a closing member (a valve clack, a valve plate or a butterfly plate) which is a disc and rotates around a valve shaft. The pipe mainly plays a role in cutting off and throttling. The butterfly valve opening and closing piece is a disc-shaped butterfly plate and rotates around the axis of the butterfly plate in the valve body, so that the opening and closing or adjusting purpose is achieved. Mainly comprises a valve body, a valve rod, a butterfly plate and a sealing ring. The valve body is cylindrical, the axial length is short, and a butterfly plate is arranged in the valve body. However, the sealing gasket of the soft seal butterfly valve is easy to deform under the condition of high pressure, so that the sealing performance of the valve is affected, and the leakage of the valve is caused.

Disclosure of Invention

An object of the utility model is to provide a two-way pressure-bearing soft seal butterfly valve. The utility model discloses can guarantee the sealing performance of valve, avoid the valve to take place to leak, and the utility model discloses still have simple structure, easy dismounting's characteristics.

The technical scheme of the utility model: a bidirectional pressure-bearing soft seal butterfly valve comprises a valve body, wherein the top of the valve body is connected with a support through a bolt, a valve rod penetrates through the valve body and the support, the top of the valve rod is connected with a hand wheel, the valve rod is connected with a butterfly plate arranged in the valve body through a pin, and a valve seat corresponding to the butterfly plate is arranged on the inner wall of the valve body; the edge of the butterfly plate is provided with an annular groove, a first sealing gasket is embedded in the annular groove, the first sealing gasket is fixed in the annular groove through a pressing ring, and the pressing ring is fixed on the butterfly plate through screws; an annular mounting groove is formed in the valve seat, and a second sealing gasket matched with the first sealing gasket is embedded in the annular mounting groove; a plurality of flow guide channels communicated with the annular groove are formed in the side face of the butterfly plate, a guide pipe is in threaded connection with one end of each flow guide channel, which is opposite to the annular mounting groove, and a plurality of mounting holes matched with the guide pipes are formed in the inner side of the first sealing gasket.

In the two-way pressure-bearing soft seal butterfly valve, the annular groove is internally provided with the barb structure, and the first sealing gasket is provided with the barb part matched with the barb structure.

In the bidirectional pressure-bearing soft seal butterfly valve, one surface of the first sealing gasket, which is opposite to the second sealing gasket, is an inclined surface.

In the bidirectional pressure-bearing soft seal butterfly valve, the annular mounting groove is internally provided with a dovetail groove, and the second sealing gasket is provided with a dovetail convex strip matched with the dovetail groove.

In the bidirectional pressure-bearing soft seal butterfly valve, one end of the flow guide channel, which is opposite to the end face of the butterfly plate, is a stepped hole with a large outer part and a small inner part.

In the bidirectional pressure-bearing soft seal butterfly valve, two groups of arc-shaped flow blocking ribs are symmetrically arranged on the end face of the butterfly plate, and the middle part of each arc-shaped flow blocking rib protrudes towards the axis of the valve rod.

In the bidirectional pressure-bearing soft seal butterfly valve, the guide pipe is in interference fit with the mounting hole.

In the bidirectional pressure-bearing soft seal butterfly valve, the first seal gasket and the second seal gasket are both made of polytetrafluoroethylene materials.

In the bidirectional pressure-bearing soft seal butterfly valve, the surface of the butterfly plate is plated with a zinc layer.

Compared with the prior art, the utility model discloses a rotate the hand wheel and make the valve rod rotate, because the butterfly plate sets up on the valve rod, the butterfly plate can be opened, closed or adjusting valve around the axis rotation of valve rod in the valve body. When the valve is closed, the first sealing gasket on the butterfly plate gradually presses the second sealing gasket, the first sealing gasket and the second sealing gasket deform, and the sealing force of the valve gradually reaches the maximum value at the moment. After the valve is closed, because rivers get into the pipe through the water conservancy diversion passageway of butterfly plate, water pressure produces the extrusion force in the ring channel of first sealed pad for first sealed pad produces towards the sealed deformation that fills up of second, has strengthened greatly the utility model discloses a sealing performance avoids the valve to take place to leak. And the utility model discloses simple structure, easy dismounting helps the maintenance operation.

The utility model discloses design barb mechanism in the ring channel, first seal stack up have with barb portion that barb structure agrees with mutually, when making things convenient for the installation of first sealed pad, guaranteed the fastness of the installation of first sealed pad. The second sealing gasket is matched with the annular mounting groove in a dovetail-shaped protruding strip and dovetail-shaped groove matching mode, and the characteristic that the second sealing gasket is easy to disassemble and assemble is also embodied.

The utility model discloses the one end of the relative butterfly plate terminal surface of water conservancy diversion passageway is outer big in little shoulder hole, is favorable to rivers to get into the water conservancy diversion passageway, increases rivers to the extrusion force of first sealed pad to improve the sealing performance of valve.

The utility model discloses the symmetry sets up two sets of arc choked flow muscle on the butterfly plate terminal surface, every arc choked flow muscle middle part arch towards the axis of valve rod. Utilize arc choked flow muscle can reduce the washing away of fluid to the butterfly plate to reduce the washing away of fluid to first sealed pad, greatly reduced fluid wash away to the influence of first sealed pad sealing performance, improved the utility model discloses the ability of two-way pressure-bearing.

The utility model discloses plate with the zinc layer on butterfly plate surface, the galvanizing coat has the rusty function of butterfly plate of preventing.

Drawings

Fig. 1 is a schematic structural view of the whole of the present invention;

FIG. 2 is a schematic view of the first and second gaskets of the present invention;

fig. 3 is a front view of the butterfly plate of the present invention.

The labels in the figures are: 1-a valve body, 2-a support, 3-a valve rod, 4-a hand wheel, 5-a butterfly plate, 6-a valve seat, 7-a first sealing gasket, 8-a second sealing gasket, 9-a pressing ring, 10-a flow guide channel, 11-an arc flow blocking rib, 12-a guide pipe, 13-an annular groove, 14-a mounting hole, 15-a barb structure, 16-a barb part, 17-an annular mounting groove, 18-a dovetail groove and 19-a dovetail convex strip.

Detailed Description

The present invention will be further described with reference to the following examples, which are not intended as a limitation to the present invention.

Example (b): a bidirectional pressure-bearing soft seal butterfly valve is shown in the attached figures 1-3 and comprises a valve body 1, wherein the top of the valve body 1 is connected with a support 2 through a bolt, a valve rod 3 penetrates through the valve body 1 and the support 2, the top of the valve rod 3 is connected with a hand wheel 4, the valve rod 3 is connected with a butterfly plate 5 arranged inside the valve body 1 through a pin, the surface of the butterfly plate 5 is plated with a zinc layer, the zinc layer has the function of preventing the butterfly plate 5 from rusting, a valve seat 6 corresponding to the butterfly plate 5 is arranged on the inner wall of the valve body 1, and the valve seat 6 and the valve; the edge of the butterfly plate 5 is provided with an annular groove 13, a first sealing gasket 7 is embedded on the annular groove 13, the first sealing gasket 7 is fixed in the annular groove 13 through a pressing ring 9, the pressing ring 9 is fixed on the butterfly plate 5 through screws, a barb structure 15 is arranged in the annular groove 13, a barb part 16 matched with the barb structure 15 is arranged on the first sealing gasket 7, and the barb on the barb structure 15 faces the axis direction of the valve body 1 to prevent the first sealing gasket 7 from being separated from the annular groove 13, so that the first sealing gasket 7 is convenient to mount, and the mounting firmness of the first sealing gasket 7 is ensured; the valve seat 6 is provided with an annular mounting groove 17, the annular mounting groove 17 is embedded with a second sealing gasket 8 matched with the first sealing gasket 7, a dovetail groove 18 is formed in the annular mounting groove 17, the second sealing gasket 8 is provided with a dovetail convex strip 19 matched with the dovetail groove 18, and the design structure also embodies the characteristic that the second sealing gasket 8 is easy to disassemble and assemble. One surface of the first sealing gasket 7, which is opposite to the second sealing gasket 8, is an inclined surface, the first sealing gasket 7 and the second sealing gasket 8 are both made of polytetrafluoroethylene materials, and the friction coefficient is only 0.04, so that the opening torque of the valve is greatly reduced, and the service life of the valve is prolonged; the side of the butterfly plate 5 is provided with a plurality of flow guide channels 10 communicated with the annular groove 13, one end of each flow guide channel 10, relative to the annular mounting groove 17, is in threaded connection with a guide pipe 12, the front half section of each guide pipe 12 is a threaded part, and the rear half section of each guide pipe 12 is a smooth surface. The inboard of first sealed 7 of filling up is equipped with a plurality of mounting holes 14 that agree with mutually with pipe 12,

pipe

12 and 14 interference fit of mounting hole, the plain noodles part and the 14 interference fit of mounting hole of pipe 12 promptly, make the dismouting of pipe 12 very convenient, in addition, pipe 12 still has the effect that improves the rigidity of first sealed 7 of filling up, the valve is closed the back, because rivers pass through the water conservancy diversion passageway 10 entering pipe 12 of butterfly plate 5, water pressure produces the extrusion force in the ring channel 13 of first sealed 7 of filling up, make first sealed 7 of filling up produce towards the sealed 8 deformation of second, strengthened greatly the utility model discloses a sealing performance avoids the valve to take place to leak. One end of the flow guide channel 10, which is opposite to the end face of the butterfly plate 5, is a stepped hole with a large outer part and a small inner part, so that water flow can enter the flow guide channel 10, the extrusion force of the water flow on the first sealing gasket 7 is increased, and the sealing performance of the valve is improved.

As shown in fig. 3, two sets of arc-shaped choked flow ribs 11 are symmetrically arranged on the end surface of the butterfly plate 5, the arc-shaped choked flow ribs 11 are in an arch bridge shape rotating by 90 degrees, the middle part of each arc-shaped choked flow rib 11 protrudes towards the axis of the valve rod 3, and the concave part of each arc-shaped choked flow rib 11 plays a role in blocking the flow velocity of the fluid on the surface of the butterfly plate 5. Utilize arc choked flow muscle 11 can reduce the fluid to the erodeing of butterfly plate 5 to reduce the fluid to the erodeing of first sealed pad 7, greatly reduced the fluid erode to the influence of first sealed pad 7 sealing performance, improved the utility model discloses the ability of two-way pressure-bearing.

The working principle is as follows: the utility model discloses a rotating hand wheel 4 makes valve rod 3 rotate, because butterfly plate 5 sets up on valve rod 3, butterfly plate 5 is rotatory around valve rod 3's axis in valve body 1, can open, close or adjusting valve. When the valve is closed, the first sealing gasket 7 on the butterfly plate 5 gradually presses the second sealing gasket 8, the first sealing gasket 7 and the second sealing gasket 8 deform, and the sealing force of the valve gradually reaches the maximum value. After the valve is closed, because rivers get into pipe 12 through the water conservancy diversion passageway 10 of butterfly plate 5, water pressure produces the extrusion force in the ring channel 13 of first sealed pad 7 for first sealed pad 7 produces towards the sealed deformation that fills up 8 of second, has strengthened greatly the utility model discloses a sealing performance avoids the valve to take place to leak. And the utility model discloses simple structure, easy dismounting helps the maintenance operation.

Claims

1. A bidirectional pressure-bearing soft seal butterfly valve comprises a valve body (1), wherein the top of the valve body (1) is connected with a support (2) through bolts, a valve rod (3) penetrates through the valve body (1) and the support (2), the top of the valve rod (3) is connected with a hand wheel (4), the valve rod (3) is connected with a butterfly plate (5) arranged inside the valve body (1) through a pin, and a valve seat (6) corresponding to the butterfly plate (5) is arranged on the inner wall of the valve body (1); the method is characterized in that: an annular groove (13) is formed in the edge of the butterfly plate (5), a first sealing gasket (7) is embedded in the annular groove (13), the first sealing gasket (7) is fixed in the annular groove (13) through a pressing ring (9), and the pressing ring (9) is fixed on the butterfly plate (5) through screws; an annular mounting groove (17) is formed in the valve seat (6), and a second sealing gasket (8) matched with the first sealing gasket (7) is embedded in the annular mounting groove (17); the side of the butterfly plate (5) is provided with a plurality of flow guide channels (10) communicated with the annular groove (13), one end of each flow guide channel (10) opposite to the annular mounting groove (17) is in threaded connection with a guide pipe (12), and the inner side of the first sealing gasket (7) is provided with a plurality of mounting holes (14) matched with the guide pipes (12).

2. The bidirectional pressure-bearing soft seal butterfly valve of claim 1, characterized in that: be equipped with barb structure (15) in ring channel (13), be equipped with barb portion (16) that agree with mutually with barb structure (15) on first sealed pad (7).

3. The bidirectional pressure-bearing soft seal butterfly valve of claim 1, characterized in that: one surface of the first sealing gasket (7) opposite to the second sealing gasket (8) is an inclined surface.

4. The bidirectional pressure-bearing soft seal butterfly valve of claim 1, characterized in that: a dovetail groove (18) is formed in the annular mounting groove (17), and a dovetail convex strip (19) matched with the dovetail groove (18) is arranged on the second sealing gasket (8).

5. The bidirectional pressure-bearing soft seal butterfly valve of claim 1, characterized in that: one end of the flow guide channel (10) opposite to the end face of the butterfly plate (5) is a stepped hole with a large outer part and a small inner part.

6. The bidirectional pressure-bearing soft seal butterfly valve of claim 1, characterized in that: two groups of arc-shaped flow blocking ribs (11) are symmetrically arranged on the end face of the butterfly plate (5), and the middle part of each arc-shaped flow blocking rib (11) protrudes towards the axis of the valve rod (3).

7. The bidirectional pressure-bearing soft seal butterfly valve of claim 1, characterized in that: the guide pipe (12) is in interference fit with the mounting hole (14).

8. The bidirectional pressure-bearing soft seal butterfly valve of claim 1, characterized in that: the first sealing gasket (7) and the second sealing gasket (8) are both made of polytetrafluoroethylene materials.

9. The bidirectional pressure-bearing soft seal butterfly valve of claim 1, characterized in that: the surface of the butterfly plate (5) is plated with a zinc layer.