CN212509764U

CN212509764U - Metal hard sealing butterfly valve

Info

Publication number: CN212509764U
Application number: CN202021196490.4U
Authority: CN
Inventors: 付保现
Original assignee: Zhengzhou Yuhua Valve Co ltd
Current assignee: Zhengzhou Yuhua Valve Co ltd
Priority date: 2020-06-24
Filing date: 2020-06-24
Publication date: 2021-02-09
Anticipated expiration: 2030-06-24

Abstract

Metal butterfly valve sealed firmly, including valve body and valve gap, it installs valve rod and rotates between valve rod and the valve gap to rotate on the valve gap and seals, be fixed with fixed dog on being equipped with recess and the valve body on the valve plate, fixed dog is located one side of recess, the valve rod is equipped with the lead screw for hollow pole and the inside coaxial line of valve rod, screw-thread fit and lead screw keep away from the one end of valve gap between lead screw and the valve rod stretch into the recess, one side that fixed dog is close to the valve plate is equipped with the removal dog and is fixed with the bracing piece on the removal dog, the bracing piece is kept away from one of removal dog and is served and be. The bidirectional sealing can be realized, the use effect of the valve is improved under the condition of avoiding the backflow of the valve, and the use is simple and convenient.

Description

Metal hard sealing butterfly valve

Technical Field

The utility model relates to a valve equipment technical field especially relates to metal butterfly valve sealed firmly.

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 butterfly valve 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. The sealing between the sealing surface of the butterfly plate and the valve seat is realized by pressing the butterfly plate towards the valve seat by the torque of the transmission device. In the positive flow state, the higher the pressure of the medium, the tighter the seal is squeezed. When the medium in the flow channel flows reversely, the unit positive pressure between the butterfly plate and the valve seat is smaller than the pressure of the medium along with the increase of the pressure of the medium, and the sealing part can leak.

SUMMERY OF THE UTILITY MODEL

To the above situation, in order to overcome the defects of the prior art, the present invention aims to provide a metal hard sealing butterfly valve, which improves the sealing performance between the butterfly plate and the valve seat, and avoids the leakage of the butterfly valve when the fluid flows reversely.

The solution is that the metal hard seal butterfly valve comprises a valve body and a valve cover, the valve body and the valve cover are detachably arranged through bolts, the valve body is internally provided with a valve seat, the valve seat is provided with a valve plate, the valve cover is rotatably provided with a valve rod, the valve rod and the valve cover are rotatably sealed, the valve plate is provided with a groove, the valve body is fixed with a fixed stop block which is positioned at one side of the groove, the valve rod is a hollow rod, a screw rod is coaxially arranged in the valve rod, the screw rod is in threaded fit with the valve rod, one end of the screw rod, far away from the valve cover, extends into the groove, a movable stop block is arranged on one side of the fixed stop block close to the valve plate, a support rod is fixed on the movable stop block, the support rod is L-shaped, a connecting block is fixed at one end of the support rod away from the movable stop block, the valve plate is fixed on the valve rod, the connecting block is rotatably connected with one end, far away from the valve cover, of the screw rod, and the rotating handle is fixed on the valve rod, and one end, far away from the valve plate, of the screw rod extends out of the valve rod.

Preferably, an oil cavity is fixed inside the valve cover, sealing oil is filled inside the oil cavity, and the valve cover penetrates through the oil cavity and is in rotary sealing with the oil cavity.

Preferably, a handle is fixed on one end of the screw rod extending out of the valve rod.

Preferably, the opposite surfaces of the fixed stopper and the movable stopper are inclined surfaces.

Preferably, be equipped with the spout on the valve plate and the spout is located the one side towards fixed dog, the inside sliding fit of spout has fixed connection between slider and the bracing piece.

The utility model has the advantages that: the valve cover and the valve rod are sealed by adopting sealing oil, so that the rotary sealing effect of the valve rod is improved. The valve plate has good bidirectional sealing effect, and the valve plate is fixed by the stop block adopted under the condition of counter flow of the valve, so that the sealing effect of the valve plate under the counter flow is improved, and the using effect of the valve is improved. The use is simple and convenient, and the use effect is good.

Drawings

Fig. 1 is a schematic structural view of the front side of the present invention.

Fig. 2 is a schematic structural view of the shaft side of the present invention.

Fig. 3 is a schematic structural view of the side of the present invention.

Detailed Description

The following describes the embodiments of the present invention in further detail with reference to the accompanying drawings.

The metal hard seal butterfly valve is characterized in that the valve body 1 and the valve cover 2 are detachably mounted through bolts, a valve seat 7 is arranged in the valve body 1, a valve plate 8 is arranged on the valve seat 7, a valve rod 3 is rotatably mounted on the valve cover 2, the valve rod 3 and the valve cover 2 are rotatably sealed, a groove 15 is formed in the valve plate 8, a fixed stop block 11 is fixed on the valve body 1, the fixed stop block 11 is located on one side of the groove 15, the valve rod 3 is a hollow rod, a lead screw 5 is coaxially arranged in the valve rod 3, the lead screw 5 is in threaded fit with the valve rod 3, one end, far away from the valve cover 2, of the lead screw 5 extends into the groove 15, a movable stop block 12 is arranged on one side, close to the valve plate 8, of the fixed stop block 11, a support rod 13 is fixed on the movable stop block 12, the support rod 13 is of an L shape, and a connecting block 14 is fixed on one end, far away, the connecting block 14 is rotatably connected with one end, far away from the valve cover 2, of the screw rod 5, and the valve rod 3 is fixedly provided with a rotating handle 4, and one end, far away from the valve plate 8, of the screw rod 5 extends out of the valve rod 3.

This device is when using, at first establishes ties this device to the pipeline on, when needs are closed the pipeline, rotates to change 4, changes 4 and drives valve rod 3 and rotate for valve plate 8 is closed the pipeline, realizes sealed when the positive flow to the pipeline, if the continuous increase of positive flow pressure, makes valve plate 8 compress tightly to disk seat 7, can not produce and reveal. At this time, in order to avoid the situation of leakage caused by reverse flow, the screw rod 5 is rotated, the screw rod 5 can move up and down through the screw thread fit on the screw rod 5 and the valve rod 3, when the screw rod 5 rotates, the valve rod 3 cannot rotate due to the fixation of the valve plate 8 at this time, the screw rod 5 rotates and moves downwards, so as to drive the connecting block 14 to move downwards, the connecting block 14 is rotatably connected with the screw rod 5, the connecting block 14 moves downwards to drive the supporting rod 13 fixed on the connecting block 14 to move downwards, so as to drive the movable check block 12 to move downwards, so that the movable check block 12 is stopped by the fixed check block 11, so as to avoid the movement of the movable check block 12, so as to fix the supporting rod 13, the supporting rod 13 adopts an 'L' shape, so that the valve plate 8 can contact with the supporting rod 13, so as to, the valve plate 8 is prevented from moving, so that the valve is sealed in a reverse flow manner, and the valve has a good two-way sealing effect. When the valve needs to be opened, the screw rod 5 is rotated in the reverse direction to drive the movable stop block 12 to be separated from the fixed stop block 11, so that the valve plate 8 can rotate, and the valve is opened.

An oil cavity 9 is fixed inside the valve cover 2, sealing oil 10 is filled inside the oil cavity 9, and the valve cover 2 penetrates through the oil cavity 9 and is in rotary sealing with the oil cavity 9.

In order to improve the sealing effect between the valve rod 3 and the valve cover 2, an oil chamber 9 is provided inside the valve cover 2, and the sealing effect of the valve rod 3 is improved by sealing oil 10.

And a handle 6 is fixed on one end of the screw rod 5 extending out of the valve rod 3.

The handle 6 on the screw rod 5 is beneficial to the user to rotate the screw rod 5, and the convenience of the device in use is improved.

The opposite surfaces of the fixed stopper 11 and the movable stopper 12 are both inclined surfaces.

In order to make the sealing effect of the countercurrent better, the fixed stop block 11 and the movable stop block 12 are both set to be inclined planes, so that the movable stop block 12 is more compact when moving downwards to be contacted with the fixed stop block 11, the sealing effect of the countercurrent is improved, and the using effect of the device is further improved. And there is an accuracy of fitting with the fixed stopper 11 when moving down by the moving stopper 12.

Be equipped with spout 16 and spout 16 on the valve plate 8 and be located the one side towards fixed stop 11, the inside sliding fit of spout 16 has slider 17 and support rod 13 between fixed connection.

In order to enable the movable stopper 12 to rotate after the fixed stopper 11 is separated, the sliding groove 16 is arranged on the valve plate 8, the movable stopper 12 can only move up and down through the fixed connection of the sliding block 17 and the supporting rod 13, the situation that the movable stopper 12 cannot be normally matched with the fixed stopper 11 after deviation is avoided, and the using effect of the device is further improved.

The above-mentioned embodiments are not intended to limit the scope of the present invention, and various modifications and improvements made by those skilled in the art without departing from the design concept of the present invention should be included in the protection scope defined by the claims of the present invention.

Claims

1. Metal hard seal butterfly valve, including valve body (1) and valve gap (2), its characterized in that, through bolt detachable installation between valve body (1) and valve gap (2), be equipped with on disk seat (7) and disk seat (7) valve plate (8) in valve body (1), it installs valve rod (3) and between valve rod (3) and valve gap (2) rotating on valve gap (2) and rotates sealedly, be fixed with fixed dog (11) on being equipped with recess (15) and valve body (1) on valve plate (8), fixed dog (11) are located one side of recess (15), valve rod (3) are equipped with lead screw (5) for hollow rod and valve rod (3) inside coaxial line, screw-thread fit and lead screw (5) between lead screw (5) and valve rod (3) keep away from one end of valve gap (2) and stretch into recess (15), one side that fixed dog (11) are close to valve plate (8) is equipped with movable dog (12) and is fixed with movable dog (12) on movable dog (12) Bracing piece (13), bracing piece (13) are served and are fixed with connecting block (14) for "L" type and bracing piece (13) keep away from one of removal dog (12), valve gap (2) is kept away from with lead screw (5) one end rotation connection in connecting block (14), be fixed with on valve rod (3) and change (4) and lead screw (5) one end of keeping away from valve plate (8) and stretch out valve rod (3).

2. The metal hard seal butterfly valve according to claim 1, wherein an oil chamber (9) is fixed inside the valve cover (2) and the oil chamber (9) is filled with sealing oil (10), and the valve cover (2) penetrates through the oil chamber (9) and is rotationally sealed with the oil chamber (9).

3. The metal hard seal butterfly valve according to claim 1, characterized in that a handle (6) is fixed to the end of the screw (5) that protrudes from the valve stem (3).

4. The metal hard seal butterfly valve according to claim 1, characterized in that the opposite faces of the fixed stop (11) and the moving stop (12) are inclined.

5. The metal hard seal butterfly valve according to claim 1, characterized in that the valve plate (8) is provided with a sliding groove (16) and the sliding groove (16) is located on a surface facing the fixed stopper (11), a sliding block (17) is slidably fitted inside the sliding groove (16), and the sliding block (17) is fixedly connected with the support rod (13).