CN111350833A

CN111350833A - Butterfly valve

Info

Publication number: CN111350833A
Application number: CN202010220905.5A
Authority: CN
Inventors: 陈少同; 其他发明人请求不公开姓名
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-03-26
Filing date: 2020-03-26
Publication date: 2020-06-30

Abstract

The invention discloses a butterfly valve, which comprises a valve body, wherein a channel is arranged in the valve body, the left end of the channel is an inlet, and the right end of the channel is an outlet; the end face of the valve plate is provided with an upper lug, a rotating shaft hole with one open end is formed in the upper lug, and the loop bar extends into the rotating shaft hole and is fixedly connected with the upper lug; the inner side wall of the channel is provided with a convex block; a fan-shaped cutting groove is formed in one end, extending into the rotating shaft hole, of the sleeve rod, a shaft rod is rotatably connected in the sleeve rod, and a stop block extending into the fan-shaped cutting groove is arranged on the side face of the shaft rod in an extending mode; the stop block divides the fan-shaped cutting groove into a first chamber and a second chamber; an elastic component is arranged in the valve body; the valve body is provided with a positioning assembly; the butterfly valve is simple in structure and good in sealing effect.

Description

Butterfly valve

Technical Field

The invention belongs to the technical field of pipeline valves, and particularly relates to a butterfly valve.

Background

The butterfly valve is also called a flap valve, is a regulating valve with simple structure, and mainly plays a role in cutting off and throttling on a pipeline. The butterfly valve opening and closing piece is a disc-shaped turning plate and rotates around the axis of the butterfly valve opening and closing piece in the valve body, so that the opening and closing or adjusting purpose is achieved. However, the leakage problem often occurs due to the structural characteristics of the valve plate in the use process of a common butterfly valve, and the valve plate of the butterfly valve can generate serious friction with the sealing element in the overturning process, so that the abrasion of the sealing element is serious, and the service life of the butterfly valve is seriously influenced.

Disclosure of Invention

The invention aims to provide a butterfly valve which is simple in structure and good in sealing effect.

In order to achieve the purpose, the invention provides the following technical scheme:

a butterfly valve comprises a valve body, wherein a channel is arranged in the valve body, the left end of the channel is an inlet, the right end of the channel is an outlet, the side surface of the valve body is rotatably connected with a loop bar, one end of the loop bar extends into the channel, one end of the loop bar extending into the channel is provided with a valve plate assembly used for controlling the on-off of the channel, the valve plate assembly comprises a valve plate, and the circumferential side surface of the valve plate is provided with a rubber cylinder capable of expanding and retracting; an expansion cavity is formed between the rubber cylinder and the circumferential side surface of the valve plate; the end face of the valve plate is provided with an upper lug, a rotating shaft hole with one open end is formed in the upper lug, and the loop bar extends into the rotating shaft hole and is fixedly connected with the upper lug; the inner side wall of the channel is provided with a convex block, and the valve plate is abutted against the convex block when the valve plate closes the channel; the sleeve rod is provided with a fan-shaped cutting groove at one end extending into the rotating shaft hole, a shaft lever is rotationally connected in the sleeve rod, the upper end of the shaft lever extends out of the sleeve rod and is fixedly provided with a handle, a stop block extending into the fan-shaped cutting groove is arranged on the side surface of the shaft lever in an extending mode, and the stop block is connected between one end far away from the shaft lever and the inner side wall of the rotating shaft hole in a sliding mode; the baffle divides the fan-shaped cutting groove into a first chamber and a second chamber, the first chamber is communicated with the expansion cavity, and the second chamber is communicated with the channel; when the stop block rotates towards the first cavity, the rubber cylinder expands, and when the stop block rotates towards the second cavity, the rubber cylinder contracts; an elastic component used for forcing the stop block to move towards the second chamber is arranged in the valve body; the valve body is provided with a positioning assembly, and the positioning assembly is used for positioning the handle.

In a further technical scheme, a first through hole for communicating the first cavity with the expansion cavity is formed in the valve plate; and a second through hole communicated with the second cavity is formed in the upper lug.

In a further technical scheme, a check valve communicated with the first through hole is arranged on the valve plate and used for controlling pressure fluid in the channel to flow into the first through hole; the one-way valve is arranged to ensure that when the volume of the first chamber is minimum, if the pressure in the first chamber, the first through hole and the expansion cavity is too low due to leakage, the medium in the channel can automatically enter the first chamber, the first through hole and the expansion cavity through the one-way valve to replenish the liquid.

In a further technical scheme, elastic component includes the torsional spring, the lower extreme of axostylus axostyle is worn out the pivot hole and is equipped with the convex shoulder, be equipped with the bumping post on the convex shoulder, be equipped with on the upper lug to the flange that the convex shoulder direction extends, the torsional spring cup joints on the axostylus axostyle and is located between lug and the convex shoulder, the one end of torsional spring supports on the bumping post, the other end supports and is used for forcing the axostylus axostyle to drive the dog and rotate to second cavity direction on the flange.

In a further technical scheme, a convex column is arranged on the side face of the valve body, a mounting groove is formed in the outer side of the sleeve rod in the convex column, a sealing ring sleeved on the sleeve rod is arranged in the mounting groove, a plug sleeved on the sleeve rod is fixedly mounted at an opening at the upper end of the mounting groove, and the plug is used for preventing the sealing ring from being separated from the mounting groove.

In a further technical scheme, the locating component comprises a locating disc, a locating rod and a locating spring, the locating disc is fixedly installed at the upper end of the plug, the locating rod is hinged to the handle, the locating spring is located between the handle and the locating rod, and the locating spring is used for forcing one end of the locating rod to be inserted into a locating groove in the outer circumferential side face of the locating disc.

Advantageous effects

Compared with the prior art, the technical scheme of the invention has the following advantages:

(1) the elastic rubber cylinder is inflated by filling liquid into the elastic rubber cylinder, so that the butterfly valve has a better sealing effect;

(2) when the butterfly valve is opened, the medium pressure in the rubber cylinder is reduced, the rubber cylinder shrinks to reduce the friction between the rubber cylinder and the wall of the butterfly valve pipe in the rotation process of the valve plate, the abrasion of the rubber cylinder is reduced, and the service life is prolonged.

Drawings

FIG. 1 is a cross-sectional view of the present invention;

FIG. 2 is a cross-sectional view taken along the line A-A of the present invention;

FIG. 3 is a cross-sectional view taken along the direction C-C of the present invention;

FIG. 4 is a cross-sectional view taken along the line B-B of the present invention;

FIG. 5 is a cross-sectional view of the present invention in an intermediate operating state;

FIG. 6 is a cross-sectional view taken in the direction D-D of FIG. 5;

FIG. 7 is a cross-sectional view taken in the direction E-E of FIG. 5;

FIG. 8 is a cross-sectional view of the present invention with the valve plate open;

FIG. 9 is a cross-sectional view taken in the direction F-F of FIG. 8;

fig. 10 is a sectional view taken in the direction of G-G in fig. 8.

Detailed Description

Referring to fig. 1 to 10, a butterfly valve includes a valve body 9, a passage 901 is provided in the valve body 9, the left end of the passage 901 is an inlet, and the right end of the passage 901 is an outlet, a side surface of the valve body 9 is rotatably connected with a loop bar 3 with one end extending into the passage 901, one end of the loop bar 3 extending into the passage 901 is provided with a valve plate assembly for controlling the opening and closing of the passage 901, the valve plate assembly includes a valve plate 1, and a rubber sleeve 4 capable of expanding and retracting is provided on a circumferential side surface of the valve plate 1; an expansion cavity 4a is formed between the rubber cylinder 4 and the circumferential side surface of the valve plate 1; the end face of the valve plate 1 is provided with an upper lug 11, a rotating shaft hole 11a with an opening at one end is formed in the upper lug 11, and the loop bar 3 extends into the rotating shaft hole 11a and is fixedly connected with the upper lug 11 through a positioning pin; a bump 9a is arranged on the inner side wall of the passage 901, and when the passage 901 is closed by the valve plate 1, the valve plate 1 abuts against the bump 9 a; a fan-shaped cutting groove 3a is formed in one end, extending into the rotating shaft hole 11a, of the sleeve rod 3, a shaft rod 2 is connected in the sleeve rod 3 in a rotating mode, the upper end of the shaft rod 2 extends out of the sleeve rod 3 and is fixedly provided with a handle 5, a stop block 2a extending into the fan-shaped cutting groove 3a is arranged on the side face of the shaft rod 2 in an extending mode, and the stop block 2a is connected between one end, far away from the shaft rod 2, of the stop block and the inner side wall of the rotating shaft hole 11; the block 2a divides the fan-shaped cutting slot 3a into a first chamber 1b and a second chamber 1e, wherein the first chamber 1b is communicated with the expansion cavity 4a, and the second chamber 1e is communicated with the passage 901; when the block 2a rotates towards the first chamber 1b, the rubber cylinder 4 expands, and when the block 2a rotates towards the second chamber 1e, the rubber cylinder 4 contracts; an elastic component for forcing the stop block 2a to move towards the second chamber 1e is arranged in the valve body 9; and a positioning assembly is arranged on the valve body 9 and used for positioning the handle 5.

Wherein, a first through hole 1a used for communicating a first cavity 1b and an expansion cavity 4a is arranged in the valve plate 1; a second through hole 1c communicated with the second chamber 1e is arranged in the upper lug 11. The valve plate 1 is provided with a check valve 7 communicated with the first through hole 1a, and the check valve 7 is used for controlling the pressure fluid in the passage 901 to flow into the first through hole 1 a. The function of the check valve 7 is that when the volume of the first chamber 1b is minimum, if the pressure in the first chamber 1b, the first through hole 1a and the expansion cavity 4a is too low due to leakage, the medium in the channel 901 can automatically enter the first chamber, the first through hole 1a and the expansion cavity 4a through the check valve 7 to perform fluid replacement.

Elastic component includes torsional spring 8, the lower extreme of axostylus axostyle 2 is worn out pivot hole 11a and is equipped with shoulder 21, be equipped with bumping post 2b on the shoulder 21, upward be equipped with on the lug 11 to the flange 1d that the 21 direction of shoulder extends, torsional spring 8 cup joints on axostylus axostyle 2 and is located between lug 11 and the shoulder 21, the one end of torsional spring 8 supports on bumping post 2b, the other end supports and is used for forcing axostylus axostyle 2 to drive dog 2a and rotate to second cavity 1e direction on flange 1 d.

The side of the valve body 9 is provided with a convex column 91, the convex column 91 is internally provided with a mounting groove 92 at the outer side of the loop bar 3, a sealing ring 93 sleeved on the loop bar 3 is arranged in the mounting groove 92, an opening at the upper end of the mounting groove 92 is fixedly provided with a plug 94 sleeved on the loop bar 3, and the plug 94 is used for preventing the sealing ring 93 from separating from the mounting groove 92. The positioning assembly comprises a positioning disc 95, a positioning rod 96 and a positioning spring 97, the positioning disc 95 is fixedly mounted at the upper end of the plug 94, the positioning rod 96 is hinged on the handle 5, the positioning spring 97 is located between the handle 5 and the positioning rod 96, and the positioning spring 97 is used for forcing one end of the positioning rod 96 to be inserted into a positioning groove (not shown in the prior art) on the outer circumferential side surface of the positioning disc 95.

As shown in figure 1, the butterfly valve is a simple structure of the butterfly valve, the butterfly valve needs to be connected into a pipeline before working, when the butterfly valve needs to be opened, the positioning rod 96 needs to be pinched firstly, so that one end of the positioning rod 96 is separated from the positioning groove on the outer circumferential side surface of the positioning disc 95, the rotating handle 5 drives the shaft rod 2 to rotate, the stop block 2a is driven to rotate towards the direction of the second chamber 1e through the rotation of the shaft rod 2, at the moment, the first chamber 1b is increased, the pressure of an internal medium is reduced, and the rubber barrel 4 is contracted. As shown in fig. 5 and 6, when the stopper 2a abuts against one end of the sector-shaped slot 3a, the handle 5 continues to rotate, which drives the loop bar 3 to rotate and the valve plate 1 to rotate; as shown in fig. 8, when the valve plate 1 is rotated to fully open the valve port and then stopped, the butterfly valve is fully opened.

When the butterfly valve needs to be closed, the positioning rod 96 needs to be pinched, so that one end of the positioning rod 96 is separated from the positioning groove on the outer circumferential side surface of the positioning disc 95, the rotation handle 5 drives the shaft rod 2 to rotate, at the moment, the torsion spring 8 pushes the valve plate 1 to rotate along with the rotation in the rotation process of the shaft rod 2, at the moment, the first chamber 1b cannot be shrunk, as shown in fig. 5, after the valve plate 1 rotates and contacts with the bump 9a, the valve plate 1 stops, the handle 5 continues to rotate, at the moment, the stop block 2a rotates towards the first chamber 1b to compress the torsion spring 8, the first chamber 1b is shrunk, the internal medium of the first chamber is pressed into the rubber cylinder 4 through the first channel 901 to expand the rubber cylinder 4 to seal the valve plate 1, when the stop block 2a abuts against the other end of the fan-shaped cutting groove 3a, the handle 5 stops, at the moment, the first chamber 1, thus, the sealing degree of the rubber cylinder 4 reaches the maximum, and the butterfly valve is closed.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the technical principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims

1. A butterfly valve comprises a valve body, wherein a channel is arranged in the valve body, the left end of the channel is an inlet, the right end of the channel is an outlet, the side surface of the valve body is rotatably connected with a loop bar, one end of the loop bar extends into the channel, one end of the loop bar extending into the channel is provided with a valve plate assembly used for controlling the on-off of the channel, the valve plate assembly comprises a valve plate, and the circumferential side surface of the valve plate is provided with a rubber cylinder capable of expanding and retracting; an expansion cavity is formed between the rubber cylinder and the circumferential side surface of the valve plate; the end face of the valve plate is provided with an upper lug, a rotating shaft hole with one open end is formed in the upper lug, and the loop bar extends into the rotating shaft hole and is fixedly connected with the upper lug; the inner side wall of the channel is provided with a convex block, and the valve plate is abutted against the convex block when the valve plate closes the channel; the sleeve rod is provided with a fan-shaped cutting groove at one end extending into the rotating shaft hole, a shaft lever is rotationally connected in the sleeve rod, the upper end of the shaft lever extends out of the sleeve rod and is fixedly provided with a handle, a stop block extending into the fan-shaped cutting groove is arranged on the side surface of the shaft lever in an extending mode, and the stop block is connected between one end far away from the shaft lever and the inner side wall of the rotating shaft hole in a sliding mode; the baffle divides the fan-shaped cutting groove into a first chamber and a second chamber, the first chamber is communicated with the expansion cavity, and the second chamber is communicated with the channel; when the stop block rotates towards the first cavity, the rubber cylinder expands, and when the stop block rotates towards the second cavity, the rubber cylinder contracts; an elastic component used for forcing the stop block to move towards the second chamber is arranged in the valve body; the valve body is provided with a positioning assembly, and the positioning assembly is used for positioning the handle.

2. The butterfly valve of claim 1, wherein a first through hole is provided in the valve plate for communicating the first chamber with the expansion chamber; and a second through hole communicated with the second cavity is formed in the upper lug.

3. The butterfly valve of claim 2, wherein the valve plate is provided with a check valve in communication with the first through hole, the check valve being configured to control the flow of pressurized fluid within the passage into the first through hole.

4. The butterfly valve of claim 1, wherein the resilient member comprises a torsion spring, the lower end of the shaft passes through the hole of the shaft and has a shoulder, the shoulder has a stop post, the upper lug has a rib extending toward the shoulder, the torsion spring is sleeved on the shaft and located between the upper lug and the shoulder, one end of the torsion spring abuts against the stop post, and the other end of the torsion spring abuts against the rib for forcing the shaft to drive the stop to rotate toward the second chamber.

5. The butterfly valve according to claim 1, wherein a convex column is disposed on a side surface of the valve body, a mounting groove is disposed inside the convex column and outside the loop bar, a sealing ring sleeved on the loop bar is disposed inside the mounting groove, a plug sleeved on the loop bar is fixedly mounted at an opening at an upper end of the mounting groove, and the plug is used for preventing the sealing ring from separating from the mounting groove.

6. The butterfly valve of claim 5, wherein the positioning assembly comprises a positioning plate fixedly mounted at an upper end of the plug, a positioning rod hinged to the handle, and a positioning spring disposed between the handle and the positioning rod for forcing one end of the positioning rod to be inserted into the positioning groove at the outer circumferential side of the positioning plate.