CN114704654A

CN114704654A - Pre-decompression butterfly valve

Info

Publication number: CN114704654A
Application number: CN202210383165.6A
Authority: CN
Inventors: 杨兰
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-04-12
Filing date: 2022-04-12
Publication date: 2022-07-05

Abstract

The invention relates to the technical field of industrial valves, in particular to a pre-pressure-relief butterfly valve which comprises a valve body, a valve seat, a valve rod, a butterfly plate and a sealing device, wherein the valve seat is fixedly arranged at the top of the valve body, the valve rod is rotatably arranged in the valve body, the butterfly plate is fixedly arranged on the outer surface of the valve rod, the sealing device is arranged in the valve body, a transmission mechanism is arranged in the valve body and positioned on the right side of the sealing device, a pressure-relief mechanism is arranged in the butterfly plate, and the sealing device comprises a control ring rotatably arranged in the valve body. The butterfly plate sealing device can enable the control panel to rotate through the transmission mechanism, so that the sealing block is pushed out and contracted inwards through the connecting strip by the control panel, the sealing position of the butterfly plate and the inner wall of the butterfly valve is further sealed, the sealing performance of the butterfly valve is improved, the leakage phenomenon of the butterfly valve is reduced, meanwhile, the butterfly plate can be further reinforced through the surrounding sealing plate, and the phenomenon that the butterfly plate is damaged due to the fact that the pressure on one side is too large is prevented.

Description

Pre-decompression butterfly valve

Technical Field

The invention relates to the technical field of industrial valves, in particular to a pre-pressure-relief butterfly valve.

Background

A butterfly valve, also called a flap valve, is a regulating valve with simple structure, and can be used for the on-off control of low-pressure pipeline media, namely a valve with a closing member which is a disc and rotates around a valve shaft to open and close. The valve can be used for controlling the flow of various types of fluids such as air, water, steam, various corrosive media, slurry, oil products, liquid metal, radioactive media and the like, and mainly plays a role in cutting off and throttling on a pipeline.

The existing pre-decompression butterfly valve has the defects that the radial eccentricity of a valve rod and the friction force of a sealing surface of the existing pre-decompression butterfly valve cause the torque of a valve protection ball to be very large, the tightness of the butterfly valve is poor compared with that of a ball valve and a gate valve, the working requirements of the butterfly valve cannot be met in many environments, meanwhile, the two sides of the butterfly plate are stressed unevenly due to the fact that the pipeline on the two sides of the butterfly plate is large in stress, and the butterfly plate is damaged easily.

To this end, a pre-relief butterfly valve is proposed.

Disclosure of Invention

The invention aims to provide a pre-pressure-relief butterfly valve, which can enable a control panel to rotate through a transmission mechanism, enables the control panel to push out and contract inwards a sealing block through a connecting strip, and further seals a place where a butterfly plate and the inner wall of the butterfly valve are sealed, so as to solve the problems in the background technology.

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

the utility model provides a pressure release butterfly valve in advance, includes the valve body, the disk seat, and fixed mounting is in the top of valve body, the valve rod rotates and installs the inside of valve body, butterfly plate, fixed mounting are in the surface of valve rod, the inside of valve body is provided with sealing device, the inside of valve body just is located sealing device's the right-hand drive mechanism that is provided with, the inside of butterfly plate is provided with pressure release mechanism, sealing device installs the inside control ring at the valve body including rotating, the right side fixed mounting of control ring has annular bevel gear, the inside equidistance slidable mounting of valve body has four sealed pieces, four the right side of sealed piece is all rotated and is installed the connecting strip, the relative position of connecting strip and control ring rotates and connects.

Preferably, one side of each of the four sealing blocks extends into the valve body, and the opposite parts of the sealing blocks and the butterfly plate are movably connected.

Preferably, drive mechanism installs the pivot in the valve body inside including rotating, the top of pivot runs through valve body and disk seat in proper order and extends to the outside of disk seat, the top fixed mounting of pivot has the carousel.

Preferably, the limiting groove has been seted up to the surface of pivot, the inside fixed mounting of disk seat has spacing post, the surface of spacing post and the internal surface sliding connection of limiting groove, the limiting groove comprises two horizontal spouts and a chute of connecting two horizontal spouts from top to bottom, and is located the horizontal spout of the horizontal spout length of top and below.

Preferably, the bottom mounting of pivot has the driving gear, the internal rotation of valve body installs drive gear No. one, the top of valve rod extends to the inside of valve body, the bottom of valve rod runs through the valve body and extends to the outside of valve body, the top fixed mounting of valve rod has No. two drive gear.

Preferably, the bottom of the first transmission gear is fixedly provided with a transmission bevel gear, the driving gears are meshed with the first transmission gear and the second transmission gear, and the transmission bevel gear is meshed with the annular bevel gear.

Preferably, the pressure relief mechanism includes the inside control panel of slidable mounting at the butterfly plate, the equal fixed mounting in both sides at control panel top has the limiting plate, the inside front of butterfly plate and the equal slidable mounting in back have the pressure relief board.

Preferably, a spring is fixedly mounted between the two pressure relief plates, a pressure relief hole is formed in the left side of the butterfly plate, a sliding groove is formed in the top of each pressure relief plate in a penetrating mode, and the outer surface of the limiting plate is connected with the inner surface of the sliding groove in a sliding mode.

Preferably, the inside slidable mounting of valve rod has the control lever, the relative position fixed connection of control lever and control panel, the top fixed mounting of control lever has No. two springs, the top of No. two springs and the inner wall fixed connection of valve rod.

Preferably, the bottom of control lever runs through the valve rod and extends to the outside of valve rod, the ring channel has been seted up to one side of control lever, the inside of valve rod is rotated and is installed spacing, the surface of spacing and the internal surface sliding connection of ring channel.

Compared with the prior art, the invention has the beneficial effects that:

1. can make the control panel rotate through drive mechanism, make the control panel through the connecting strip with sealed piece outer release with inside shrink, further seal in the inclosed place of butterfly plate and butterfly valve inner wall, improve the seal of butterfly valve, reduce the phenomenon that the butterfly valve took place the seepage, can also carry out further reinforcement to the butterfly plate through the closing plate that encircles simultaneously, prevent that one side pressure from too big leading to the phenomenon that the butterfly plate upset takes place to damage.

2. Through the cooperation of spacing groove and spacing post, realize the switching of the meshing between control driving gear and a drive gear and No. two drive gears, make the butterfly valve when closing and opening, only need rotate the pivot, can be when opening the butterfly plate, sealing device can open in advance, and after the butterfly plate was closed, sealing device can close voluntarily, and it is more convenient at the in-process of butterfly plate switching to make the butterfly valve.

3. Loosening after pressing the control lever, making the control lever take the ring channel to move to valve rod inside simultaneously, make the control lever fixed after removing, the limiting plate passes through the sliding tray with two pressure release boards inwards and outside pulling simultaneously, control the pressure release hole and open and close, the both sides of intercommunication butterfly valve make both sides pressure tend to the same, make the butterfly valve use more convenient laborsaving when releasing pressure to both sides.

Drawings

FIG. 1 is a perspective view of the external structure of the present invention;

FIG. 2 is a front view in longitudinal section of the internal structure of the present invention;

FIG. 3 is a longitudinal sectional side view of the internal structure of the present invention;

FIG. 4 is a longitudinal sectional side view of the inner structure of the butterfly plate of the present invention;

FIG. 5 is a front view of the internal structure of the valve stem of the present invention;

fig. 6 is a side view of the internal structure of the valve stem of the present invention.

In the figure: the pressure relief valve comprises a valve body 1, a valve seat 2, a valve rod 3, a butterfly plate 4, a sealing device 5, a transmission mechanism 6, a pressure relief mechanism 7, a control ring 8, a ring-shaped bevel gear 9, a sealing block 10, a connecting strip 11, a rotating shaft 12, a rotating disc 13, a limiting groove 14, a limiting column 15, a driving gear 16, a first transmission gear 17, a second transmission gear 18, a transmission bevel gear 19, a control plate 20, a limiting plate 21, a pressure relief plate 22, a first spring 23, a pressure relief hole 24, a sliding groove 25, a control rod 26, a second spring 27, an annular groove 28 and a limiting strip 29.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first" and "second" may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise. Furthermore, the terms "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The embodiment of the invention provides a pre-pressure-relief butterfly valve, which solves the problem that the sealing performance of the butterfly valve is inferior to that of a ball valve and a gate valve due to the fact that the radial eccentricity of a valve rod and the friction force of a sealing surface of the existing pre-pressure-relief butterfly valve cause large torque of a valve ball retainer in the using process; the side with larger pipeline stress at the two sides can cause the two sides of the butterfly plate to be stressed unevenly, so that the butterfly plate is easy to be damaged;

in order to solve the technical problems, the technical scheme in the embodiment of the invention has the following general idea: the control panel can rotate through the transmission mechanism, the sealing block is pushed out and contracted inwards through the connecting strip by the control panel, the butterfly plate and the inner wall of the butterfly valve are further sealed in a closed place, the tightness of the butterfly valve is improved, the phenomenon of leakage of the butterfly valve is reduced, meanwhile, the butterfly plate can be further reinforced through the surrounding sealing plate, and the phenomenon that the butterfly plate is damaged due to the fact that the butterfly plate is overturned due to the fact that pressure on one side is too large is prevented;

referring to fig. 1 to 6, the present invention provides a pre-pressure relief butterfly valve, which has the following technical scheme:

the utility model provides a pressure release butterfly valve in advance, including valve body 1, disk seat 2, fixed mounting is at the top of valve body 1, valve rod 3, rotate the inside of installing at valve body 1, butterfly plate 4, fixed mounting is at the surface of valve rod 3, the inside of valve body 1 is provided with sealing device 5, the inside of valve body 1 just is located the right-hand drive mechanism 6 that is provided with of sealing device 5, the inside of butterfly plate 4 is provided with pressure release mechanism 7, sealing device 5 is including rotating the control ring 8 of installing in the inside of valve body 1, the right side fixed mounting of control ring 8 has annular bevel gear 9, the inside equidistance slidable mounting of valve body 1 has four sealed blocks 10, the right side of four sealed blocks 10 is all rotated and is installed connecting strip 11, the relative position of connecting strip 11 and control ring 8 rotates and connects, one side of four sealed blocks 10 all extends to the inside of valve body 1, the relative position swing joint of sealed block 10 and butterfly plate 4.

When the control ring 8 rotates clockwise, and the sealing block 10 can only slide inside the valve body 1, the control ring 8 pulls the sealing block 10 outwards through the connecting strip 11, and when the control ring 8 rotates anticlockwise, the sealing block 10 is pushed inwards through the connecting strip 11, and the butterfly plate 4 is further sealed with the sealed place of the inner wall of the valve body 1.

As an embodiment of the invention, referring to fig. 2, the transmission mechanism 6 includes a rotating shaft 12 rotatably installed inside the valve body 1, the top of the rotating shaft 12 sequentially penetrates through the valve body 1 and the valve seat 2 and extends to the outside of the valve seat 2, the top of the rotating shaft 12 is fixedly installed with a rotating disc 13, the outer surface of the rotating shaft 12 is provided with a limit groove 14, the inside of the valve seat 2 is fixedly installed with a limit post 15, the outer surface of the limit post 15 is slidably connected with the inner surface of the limit groove 14, the bottom end of the rotating shaft 12 is fixed with a driving gear 16, the inside of the valve body 1 is rotatably installed with a first transmission gear 17, the top end of the valve rod 3 extends to the inside of the valve body 1, the bottom end of the valve rod 3 penetrates through the valve body 1 and extends to the outside of the valve body 1, the top end of the valve rod 3 is fixedly installed with a second transmission gear 18, the bottom of the first transmission gear 17 is fixedly installed with a transmission bevel gear 19, the driving gear 16 is engaged with the first transmission gear 17 and the second transmission gear 18, the drive bevel gear 19 meshes with the ring bevel gear 9.

The rotating shaft 12 is rotated counterclockwise through the rotating disc 13, wherein the limiting groove 14 is composed of an upper horizontal sliding groove and a lower horizontal sliding groove and a chute connecting the two horizontal sliding grooves, the horizontal sliding grooves are arc-shaped sliding grooves extending horizontally, and the horizontal sliding groove positioned at the upper part is longer than the horizontal sliding groove positioned at the lower part, so that the bottom driving gear 16 is firstly meshed with the first transmission gear 17 in the rotating process of the rotating shaft 12, at the moment, the limiting column 15 moves in the horizontal sliding groove positioned at the lower part to drive the transmission bevel gear 19 to rotate clockwise, thereby driving the control ring 8 to rotate clockwise through the annular bevel gear 9, releasing the sealing of the sealing device 5 on the butterfly plate 4, when the limiting column 15 moves to the inclined groove position of the limiting groove 14 in the rotating process, the rotating shaft 12 is pulled downwards, so that the driving gear 16 leaves the first transmission gear 17 to be meshed with the second transmission gear 18, the rotating shaft 12 is rotated counterclockwise, at the moment, the limiting column 15 moves in the horizontal sliding groove positioned at the upper part, the shaft 12 drives the valve rod 3 and the butterfly plate 4 on the valve rod 3 to rotate clockwise through the second transmission gear 18 to open the butterfly valve.

As an embodiment of the present invention, referring to fig. 4-6, the pressure relief mechanism 7 includes a control plate 20 slidably mounted inside a butterfly plate 4, two sides of the top of the control plate 20 are fixedly mounted with a limit plate 21, a front surface and a back surface inside the butterfly plate 4 are slidably mounted with pressure relief plates 22, a first spring 23 is fixedly mounted between the two pressure relief plates 22, the left side of the butterfly plate 4 is provided with a pressure relief hole 24, the top of the pressure relief plate 22 is provided with a sliding groove 25 in a penetrating manner, the outer surface of the limit plate 21 is slidably connected with the inner surface of the sliding groove 25, the inside of the valve stem 3 is slidably mounted with a control rod 26, the control rod 26 is fixedly connected with the opposite portion of the control plate 20, the top of the control rod 26 is fixedly mounted with a second spring 27, the top of the second spring 27 is fixedly connected with the inner wall of the valve stem 3, the bottom of the control rod 26 penetrates through the valve stem 3 and extends to the outside of the valve stem 3, one side of the control rod 26 is provided with an annular groove 28, a stop strip 29 is rotatably mounted inside the valve stem 3, and the outer surface of the stop strip 29 is slidably connected with the inner surface of the annular groove 28.

When the pressure on the two sides of the butterfly valve needs to be relieved, the control rod 26 is released after being pressed, the control rod 26 drives the annular groove 28 to move towards the inside of the valve rod 3 at the same time, the limiting strip 29 moves to the bottom concave position from the concave position at the top of the annular groove 28 along the annular groove 28, the second spring 27 pushes the control rod 26 outwards all the time, so that the limiting strip 29 hooks the control rod 26 at the concave position at the bottom of the annular groove 28 through the annular groove 28, the control rod 26 is fixed after moving upwards, and the control plate 20 on the control rod 26 is driven to move simultaneously, so that the limiting plate 21 on the control plate 20 pulls the two pressure relief plates 22 towards the direction approaching each other through the sliding groove 25, and in an initial state, the pressure relief plate 22 can block the opening of the pressure relief hole 24 in the butterfly plate 4, and the pressure relief hole 24 penetrating and arranged in the butterfly plate 4 is blocked from the middle position, so that when the two pressure relief plates 22 move towards each other direction, the pressure relief hole 24 is communicated, so that the pressure relief hole 24 is opened, two sides of the butterfly valve are communicated, and the pressures of the two sides tend to be the same.

The working principle is as follows: when a worker needs to open the butterfly valve, firstly, the worker presses and releases the control rod 26, so that the control rod 26 carries the annular groove 28 to move towards the inside of the valve rod 3 at the same time, the limit strip 29 moves from the concave part at the top of the annular groove 28 to the concave part at the bottom of the annular groove 28 along the annular groove 28, meanwhile, the second spring 27 pushes the control rod 26 outwards all the time, so that the limit strip 29 hooks the control rod 26 at the concave part at the bottom of the annular groove 28 through the annular groove 28, the control rod 26 is fixed after moving upwards, and drives the control plate 20 on the control rod 26 to move simultaneously, so that the limit plate 21 on the control plate 20 pulls the two pressure release plates 22 towards the direction approaching each other through the sliding groove 25, and in an initial state, the pressure release plates 22 block the pressure release holes 24 formed in the butterfly plate 4 from the middle positions, so when the two pressure release plates 22 move in the direction approaching each other, the pressure relief hole 24 is communicated, so that the pressure relief hole 24 is opened, the two sides of the butterfly valve are communicated, the pressure on the two sides tends to be the same, finally, the rotating shaft 12 is rotated anticlockwise through the rotating disc 13, wherein the limiting groove 14 consists of an upper transverse sliding groove, a lower transverse sliding groove and a chute connecting the two transverse sliding grooves, the length of the transverse sliding groove positioned above and the transverse sliding groove positioned below are long, so that the bottom driving gear 16 is firstly meshed with the first transmission gear 17 in the rotating process of the rotating shaft 12, at the moment, the limiting column 15 moves in the transverse sliding groove positioned below to drive the transmission bevel gear 19 to rotate clockwise, so that the control ring 8 is driven to rotate clockwise through the annular bevel gear 9, and because the sealing block 10 can only slide in the valve body 1, the control ring 8 can pull the sealing block 10 outwards through the connecting strip 11, when the sealing block 10 completely moves to the inside of the valve body 1, the limiting column 15 moves to the inclined position of the limiting groove 14 in the rotating process, the rotating shaft 12 is pulled downwards, the driving gear 16 leaves the first transmission gear 17 and is meshed with the second transmission gear 18, the rotating shaft 12 continues to rotate anticlockwise, the limiting column 15 moves in the upper transverse sliding groove, the rotating shaft 12 drives the valve rod 3 and the butterfly plate 4 on the valve rod 3 to rotate clockwise through the second transmission gear 18 to open the butterfly valve, when the butterfly valve needs to be closed, the control rod 26 is firstly pressed, the control plate 20 moves downwards and is fixed under the cooperation of the annular groove 28, the limiting strip 29 and the second spring 27, the first spring 23 pushes the two pressure release plates 22 back to the original positions to block the pressure release holes 24, then the rotating disc 13 rotates clockwise, the driving gear 16 is meshed with the second transmission gear 18 at the moment to drive the butterfly plate 4 to be closed anticlockwise, and then the driving gear 16 is meshed with the first transmission gear 17 under the driving of the limiting groove 14 and the limiting column 15, and the rotating shaft 12 is continuously rotated clockwise, so that the control ring 8 rotates anticlockwise, the sealing block 10 is pushed inwards through the connecting strip 11, the butterfly plate 4 and the sealed position of the inner wall of the valve body 1 are further sealed, and the butterfly valve can be closed.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A pre-pressure relief butterfly valve comprises a valve body (1);

the valve seat (2) is fixedly arranged at the top of the valve body (1);

the valve rod (3) is rotatably arranged in the valve body (1);

the butterfly plate (4) is fixedly arranged on the outer surface of the valve rod (3);

the method is characterized in that: the inside of valve body (1) is provided with sealing device (5), the inside of valve body (1) just is located the right-hand drive mechanism (6) that is provided with of sealing device (5), the inside of butterfly plate (4) is provided with pressure release mechanism (7), sealing device (5) are including rotating control ring (8) of installing in valve body (1) inside, the right side fixed mounting of control ring (8) has annular bevel gear (9), the inside equidistance slidable mounting of valve body (1) has four sealed pieces (10), four the right side of sealed piece (10) is all rotated and is installed connecting strip (11), the relative position of connecting strip (11) and control ring (8) rotates and is connected.

2. The pre-venting butterfly valve of claim 1, wherein: one side of each of the four sealing blocks (10) extends into the valve body (1), and the opposite parts of the sealing blocks (10) and the butterfly plate (4) are movably connected.

3. The pre-venting butterfly valve of claim 1, wherein: drive mechanism (6) are including rotating pivot (12) of installing in valve body (1) inside, the top of pivot (12) runs through valve body (1) and disk seat (2) in proper order and extends to the outside of disk seat (2), the top fixed mounting of pivot (12) has carousel (13).

4. The pre-venting butterfly valve of claim 3, wherein: the outer surface of the rotating shaft (12) is provided with a limiting groove (14), a limiting column (15) is fixedly mounted inside the valve seat (2), and the outer surface of the limiting column (15) is connected with the inner surface of the limiting groove (14) in a sliding mode.

5. The pre-venting butterfly valve of claim 3, wherein: the bottom mounting of pivot (12) has driving gear (16), drive gear (17) are installed to the inside rotation of valve body (1), the top of valve rod (3) extends to the inside of valve body (1), the bottom of valve rod (3) runs through valve body (1) and extends to the outside of valve body (1), the top fixed mounting of valve rod (3) has No. two drive gear (18).

6. The pre-venting butterfly valve of claim 5, wherein: the bottom of the first transmission gear (17) is fixedly provided with a transmission bevel gear (19), the driving gear (16) is meshed with the first transmission gear (17) and the second transmission gear (18), and the transmission bevel gear (19) is meshed with the annular bevel gear (9).

7. The pre-venting butterfly valve of claim 1, wherein: pressure release mechanism (7) are including slidable mounting at inside control panel (20) of butterfly board (4), the equal fixed mounting in both sides at control panel (20) top has limiting plate (21), inside front and the equal slidable mounting in the back of butterfly board (4) have pressure release board (22).

8. The pre-venting butterfly valve of claim 7, wherein: two fixed mounting has spring (23) No. one between pressure release board (22), pressure release hole (24) have been run through to the left side of butterfly plate (4), sliding tray (25) have been run through to the top of pressure release board (22), the surface of limiting plate (21) and the internal surface sliding connection of sliding tray (25).

9. The pre-venting butterfly valve of claim 7, wherein: the inside slidable mounting of valve rod (3) has control lever (26), the relative position fixed connection of control lever (26) and control panel (20), the top fixed mounting of control lever (26) has No. two springs (27), the top of No. two springs (27) and the inner wall fixed connection of valve rod (3).

10. The pre-venting butterfly valve of claim 9, wherein: the bottom of control lever (26) runs through valve rod (3) and extends to the outside of valve rod (3), ring channel (28) have been seted up to one side of control lever (26), the inside rotation of valve rod (3) installs spacing strip (29), the internal surface sliding connection of the surface of spacing strip (29) and ring channel (28).