CN213361127U

CN213361127U - Butterfly valve with high sealing performance

Info

Publication number: CN213361127U
Application number: CN202022392533.2U
Authority: CN
Inventors: 展洲; 李会超
Original assignee: Shijiazhuang Ruiheng Metallurgical Valve Equipment Manufacturing Co ltd
Current assignee: Shijiazhuang Ruiheng Metallurgical Valve Equipment Manufacturing Co ltd
Priority date: 2020-10-24
Filing date: 2020-10-24
Publication date: 2021-06-04
Anticipated expiration: 2030-10-24

Abstract

The application relates to a butterfly valve with high sealing performance, which comprises a valve body, wherein two semicircular valve plates are arranged in the valve body, the two valve plates are coplanar, the diameter edges of the two valve plates are at the same end point, a valve rod rotationally connected with the valve body is arranged between the two valve plates, the axis of the valve rod is parallel to the diameter edges of the two valve plates, one end of the valve rod extends out of the valve body and is provided with a driving mechanism for realizing angle adjustment of the valve plates, and sealing mechanisms are respectively arranged between the two valve plates and the valve body; the sealing mechanism comprises a valve seat which is arranged along the circumferential direction of the valve plate, the valve seat comprises a body which is fixedly connected with the inner circumferential surface of the valve body, and a limiting body which is fixedly arranged on the inner circumferential surface of the body and is abutted to one end of the valve plate in the axial direction, a rubber pad is arranged between the body and the valve plate, a mounting groove which is matched with the rubber pad is formed in the body, a spring which is abutted to the rubber pad is arranged in the mounting groove, and the two valve plates and the sealing mechanism are. This application has the effect that improves the valve plate leakproofness, reduces the butterfly valve and takes place fluid leakage.

Description

Butterfly valve with high sealing performance

Technical Field

The application relates to butterfly valve technical field especially relates to a butterfly valve of high leakproofness.

Background

The butterfly valve is also called as flap valve, is a regulating valve with simple structure, and can be used for on-off control of low-pressure pipeline fluid. The butterfly valve generally comprises a valve body, a valve seat is arranged in the valve body, a valve plate is arranged in the valve seat, a valve rod is arranged on the valve plate along the radial direction of the valve rod, a driving mechanism for realizing the rotation of the valve rod is arranged on the valve rod, and a sealing ring is arranged on the edge of the valve seat, which is attached to the valve plate. The butterfly valve has the advantages of simple structure, small volume, light weight and simple operation, and simultaneously has good flow regulation function and closing tightness.

When the existing butterfly valve is used, when the pressure of fluid in the valve body is too high, high-pressure fluid impacts the valve plate, so that the valve plate deflects, an impact gap is generated between the valve plate and the valve body, the sealing ring is easy to wear or damage, the sealing effect between the valve body and the valve plate is influenced, and the leakage condition of the butterfly valve is caused.

SUMMERY OF THE UTILITY MODEL

In order to improve the leakproofness between valve plate and the disk seat, reduce the butterfly valve and take place fluid leakage, this application provides the butterfly valve of high leakproofness.

The application provides a butterfly valve of high leakproofness adopts following technical scheme:

a butterfly valve with high sealing performance comprises a valve body, wherein two semicircular valve plates are arranged in the valve body, the two valve plates are coplanar, the diameter edges of the two valve plates are end points, a valve rod rotationally connected with the valve body is arranged between the two valve plates, the axis of the valve rod is parallel to the diameter edges of the two valve plates, one end of the valve rod extends out of the valve body and is provided with a driving mechanism for realizing angle adjustment of the valve plates, and sealing mechanisms are respectively arranged between the two valve plates and the valve body;

the sealing mechanism comprises valve seats arranged along the circumferential direction of the valve plate, the cross sections of the valve seats along the circumferential direction of the valve seats are L-shaped, each valve seat comprises a body fixedly connected with the inner circumferential surface of the valve body and a limiting body fixedly arranged on the inner circumferential surface of the body and abutted to one end of the valve plate in the axial direction, the inner circumferential surface of the body is attached to the outer circumferential surface of the valve plate, a rubber pad is arranged between the body and the valve plate, an installation groove matched with the rubber pad is formed in the body, a spring abutted to the side surface, away from the valve plate, of the rubber pad is arranged in the installation groove, the two valve seats of the two sealing mechanisms are fixedly connected at the two ends of the two sealing mechanisms in;

the mounting groove is characterized in that a limiting block is arranged on the side wall of the mounting groove, a limiting groove matched with the limiting block is formed in the side wall of the rubber pad, and the limiting block is mounted in the limiting groove and enables the rubber pad to slide in the limiting groove along the radial direction of the valve seat.

Through adopting above-mentioned technical scheme, when the valve plate was in the closure state, the valve plate outer peripheral face was inconsistent with the rubber pad, and the valve plate was inconsistent with the spacing body along its axis direction's one end, and the rubber pad was inconsistent with the valve plate lateral wall, had increased the seal stability of valve plate and disk seat, in addition, because the valve plate was inconsistent with the spacing body along its axis direction's one end, the impact force of fluid to the valve plate can be transmitted to the spacing body on to reduced the influence of fluid to the valve plate leakproofness, increased the seal stability of valve plate.

Optionally, the number of the springs is multiple, and the multiple springs are uniformly distributed along the circumferential direction of the valve seat.

Through adopting above-mentioned technical scheme, spring have a plurality ofly along disk seat circumference evenly distributed for the rubber pad is more even with the intensity that the valve plate contradicts everywhere, thereby makes the leakproofness of valve plate and rubber pad more even, makes the leakproofness of valve plate better, has reduced the emergence that the condition was revealed in the fluid emergence.

Optionally, the outer peripheral surface of the valve plate is set to be a conical surface, and the inner side wall, close to the valve plate, of the rubber pad is set to be a conical surface matched with the valve plate.

Through adopting above-mentioned technical scheme, the outer peripheral face of valve plate sets up to the circular conical surface, and when the valve plate used the valve rod as the axle rotation, the valve plate was close to disk seat and rubber pad earlier along the less one end of diameter of its axis direction for the closed process between valve plate and disk seat, the rubber pad is more smooth, also makes more laminating between valve plate and disk seat, the rubber pad, thereby makes the leakproofness better.

Optionally, a plurality of seal grooves are formed in the inner circumferential surface of the rubber pad along the axial direction of the valve seat, and the seal grooves are formed in the circumferential direction of the valve seat.

Through adopting above-mentioned technical scheme, the setting of seal groove for there are several accommodation space between the face that the rubber pad is close to the valve plate and the valve plate, when infiltration fluid between rubber pad and the valve plate, accommodation space can hold a small amount of fluid, and blocks in the further infiltration of fluid in the inconsistent gap of next ring rubber pad and valve plate.

Optionally, the valve plate is provided with a first sealing block along the outer peripheral surface of one end with a larger diameter in the axial direction.

Through adopting above-mentioned technical scheme, the setting of first sealed piece has protected valve plate and rubber pad conflict department, has avoided the direct impact of fluid to valve plate and rubber pad conflict department to increased the seal stability between valve plate and the rubber pad, reduced the emergence of the condition of revealing of fluid.

Optionally, a second sealing block is fixedly arranged between the first sealing block and the rubber pad on the body.

Through adopting above-mentioned technical scheme, because the rubber pad has elasticity, at the in-process that the valve plate is close to the rubber pad, the extrusion force to the rubber pad probably makes the rubber pad drop from the mounting groove, and the setting of second sealed piece has been protected and is fixed the part that the mounting groove was stretched out to the rubber pad, has also reduced the area of contact of fluid with the rubber pad, has increased the life of rubber pad.

Optionally, the driving mechanism includes an installation cover fixedly arranged on the outer peripheral surface of the valve body and a turbine fixedly arranged on the outer peripheral surface of the valve rod, a worm adapted to the worm is arranged on the turbine, and two ends of the worm are rotatably connected to the installation cover.

Through adopting above-mentioned technical scheme, rotate the scroll bar, the scroll bar drives the turbine and rotates, and the turbine rotation drives the valve rod and rotates, and the valve rod rotates and drives the valve plate and rotate for the fluid circulation that is located the valve body, because the turbine is difficult to drive the scroll bar and rotates, fluidic impact force is very little to the influence of valve plate position, under the condition of not operating the scroll bar, the valve plate keeps at more stable state.

Optionally, a limiting assembly used for limiting the rotation angle of the valve plate is arranged in the mounting cover.

Through adopting above-mentioned technical scheme, spacing subassembly has restricted the turned angle of valve plate to valve plate rotation range is too big, causes wearing and tearing to the butterfly valve part.

Optionally, the limiting assembly comprises two first fixing blocks which are fixedly arranged on the outer peripheral surface of the valve rod along the circumferential direction of the valve rod at intervals, a second fixing block is arranged between the two first fixing blocks, the second fixing block is fixedly arranged on the side surface of the turbine, and the second fixing block is driven by the turbine to rotate between the two first fixing blocks.

Through adopting above-mentioned technical scheme, when the valve plate was in the closure state, the second fixed block was inconsistent with the lateral wall of one of them first fixed block, and when the valve plate was in the state of opening completely, the second fixed block was inconsistent with the lateral wall of the remaining first fixed block, and spacing subassembly is injectd the rotation angle of valve plate between the contained angle of two adjacent lateral walls of two first fixed blocks.

In summary, the present application includes at least one of the following beneficial technical effects:

1. when the valve plate was in the closure state, the valve plate outer peripheral face was inconsistent with the rubber pad, and setting up of spring has increased the pressure of contact surface between rubber pad and the valve plate, has increased the sealing stability of valve plate and disk seat, in addition, because the valve plate is inconsistent with spacing body along the one end of its axis direction, the impact force of fluid to the valve plate can be transmitted on the spacing body to reduced the influence of fluid to the valve plate leakproofness, increased the sealing stability of valve plate.

2. The spring has a plurality ofly along disk seat circumference evenly distributed for the rubber pad is more even with the intensity that the valve plate contradicts everywhere, thereby makes the leakproofness of valve plate and rubber pad more even, makes the leakproofness of valve plate better, has reduced the emergence that the condition was revealed in the fluid emergence.

Drawings

FIG. 1 is a schematic structural diagram of a butterfly valve according to an embodiment of the present disclosure;

FIG. 2 is a front view of a butterfly valve according to an embodiment of the present application;

FIG. 3 is a cross-sectional view taken along line A-A of FIG. 2;

FIG. 4 is an enlarged view of detail B of FIG. 3;

fig. 5 is a partial sectional view in the direction C-C in fig. 2.

Description of reference numerals: 1. a valve body; 2. a valve plate; 21. a first seal block; 3. a valve stem; 4. a sealing mechanism; 41. a valve seat; 411. a body; 4111. mounting grooves; 4112. a spring; 4113. a limiting block; 4114. a second seal block; 412. a limiting body; 42. a rubber pad; 421. a limiting groove; 422. a sealing groove; 5. a drive mechanism; 51. mounting a cover; 52. a turbine; 53. a scroll bar; 54. a handle; 55. a limiting component; 551. a first fixed block; 552. and a second fixed block.

Detailed Description

The present application is described in further detail below with reference to figures 1-5.

The embodiment of the application discloses butterfly valve of high leakproofness, refer to fig. 1 and fig. 2, including valve body 1, be provided with two semicircular valve plates 2 in the valve body 1, two valve plates 2 coplanar, and the both ends of straight flange are endpoint altogether. The valve plate 2 is a thick plate, and the outer peripheral surface of the valve plate 2 is a conical surface. A valve rod 3 which is rotationally connected with the valve body 1 is fixedly arranged between the two valve plates 2. And sealing mechanisms 4 used for sealing the valve plates 2 and the valve body 1 are arranged between the two valve plates 2 and the valve body 1. Two sealing mechanism 4 and two valve plates 2 all use valve rod 3 to be central symmetry distribution as the axle. One end of the valve rod 3 penetrates out of the valve body 1 and is provided with a driving mechanism 5 for realizing angle adjustment of the valve plate 2.

Referring to fig. 3 and 4, the sealing mechanism 4 includes a valve seat 41, and the valve seat 41 is disposed between the valve body 1 and the valve plate 2 along the circumferential direction of the valve body 1. The valve seat 41 has an L-shaped cross section along the circumferential direction, the valve seat 41 includes a body 411 fixedly connected to the inner circumferential surface of the valve body 1, and a stopper 412 abutting against the valve plate 2 is fixedly disposed at one end of the inner circumferential surface of the body 411 along the axial direction of the valve plate 2. A rubber pad 42 is arranged between the body 411 and the valve plate 2, the rubber pad 42 is arranged along the circumferential direction of the body 411, and the rubber pad 42 is abutted to the body 411 and the valve plate 2. Be provided with the mounting groove 4111 with rubber pad 42 looks adaptation on body 411, rubber pad 42 installs in mounting groove 4111, and the department sets firmly a plurality of springs 4112 in the mounting groove 4111 in being close to rubber pad 42 outer peripheral face, and a plurality of springs 4112 are along disk seat 41 circumference evenly distributed.

Referring to fig. 3 and fig. 4, all set firmly stopper 4113 on two lateral walls of mounting groove 4111, stopper 4113 sets up along mounting groove 4111's circumference, set up on rubber pad 42 with two spacing grooves 421 of two stopper 4113 looks adaptations, spacing groove 421 is greater than stopper 4113 along the ascending length in radial direction of valve plate 2 along valve plate 2 for rubber pad 42 removes and can not break away from mounting groove 4111 in its radial certain limit.

Rubber pads 42 fixed connection of two sealing mechanism 4 becomes an annular, and when rubber pad 42 and valve plate 2 contradict, rubber pad 42 is in the state of strutting, and stopper 4113 keeps away from the one end and the rubber pad 42 separation of valve plate 2, treats that rubber pad 42 and valve plate 2 separate, and stopper 4113 keeps away from the one end and the rubber pad 42 conflict of valve plate 2, and spring 4112 is convenient for the recovery of rubber pad 42.

Referring to fig. 3 and 4, a plurality of sealing grooves 422 are uniformly formed in the side surface of the rubber gasket 42 close to the valve plate 2 along the axial direction of the valve seat 41, and the plurality of sealing grooves 422 are arranged along the circumferential direction of the rubber gasket 42. The arrangement of the sealing groove 422 enables a containing space to be formed between the rubber pad 42 and the valve plate 2, and when a small amount of fluid is accidentally infiltrated between the rubber pad 42 and the valve plate 2, a small amount of fluid can be temporarily stored in the sealing groove 422, so that the fluid is prevented from further infiltrating into the rubber pad 42, and the sealing effect of the valve plate 2 is improved. In addition, the arrangement of the sealing groove 422 reduces the contact area between the rubber pad 42 and the valve plate 2, thereby increasing the pressure of the contact surface between the rubber pad 42 and the valve plate 2 and increasing the sealing strength between the rubber pad 42 and the valve plate 2. In order to reduce the direct impact of the fluid on the rubber pad 42, the joint of the valve seat 41 and the valve body 1, a first sealing block 21 is fixedly arranged on the outer peripheral surface of the end with the larger diameter in the axial direction of the valve plate 2. In order to further improve the stability of the rubber gasket 42 in the mounting groove 4111 and improve the sealing effect of the valve plate 2, when the valve plate 2 is in the closed state, a second sealing block 4114 is fixedly arranged between the first sealing block 21 and the rubber gasket 42 on the body 411.

Referring to fig. 1 and 5, the driving mechanism 5 includes a mounting cover 51 fixedly installed on the top of the outer peripheral surface of the valve body 1, and a worm wheel 52 fixedly installed on the outer peripheral surface of the valve stem 3, and a worm 53 rotatably connected to the mounting cover 51 is engaged with the worm wheel 52. One end of the scroll 53 penetrates through the mounting cover 51 and is fixedly provided with a handle 54, so that the scroll 53 can be conveniently rotated to adjust the angle of the valve plate 2. The turbine 52 is provided with a limit assembly 55 for limiting the range of the rotation angle of the valve plate 2. The limiting assembly 55 comprises two first fixing blocks 551 fixedly arranged on the outer peripheral surface of the valve rod 3, the two first fixing blocks 551 are arranged at intervals along the circumferential direction of the valve rod 3, a second fixing block 552 is arranged between the two first fixing blocks 551, the second fixing block 552 is fixedly connected with the side surface of the turbine 52, and the second fixing block 552 rotates between the two first fixing blocks 551 under the driving of the turbine 52.

The implementation principle of the butterfly valve of this application embodiment a high leakproofness is: when the valve plate 2 is in a closed state, the outer peripheral surface of the valve plate 2 is abutted against the inner peripheral surface of the rubber pad 42, the smaller end of the cross section of the valve plate 2 is abutted against the limiting body 412, the second sealing block 4114 is abutted against the first sealing block 21 and the rubber pad 42, the second fixing block 552 is abutted against one of the first fixing blocks 551, the worm 53 is rotated, the worm 53 drives the turbine 52 to rotate, the turbine 52 drives the valve rod 3 to rotate, the valve rod 3 drives the valve plate 2 to rotate, fluid in the valve body 1 flows through a gap between the valve plate 2 and the valve seat 41, the rotation angles of the valve plate 2 are different, the flow areas of the fluid are different, when the second fixing block 552 is abutted against the remaining one of the first fixing blocks 551, the valve plate 2 is in a completely opened state, and the. When the valve plate 2 needs to be closed, the scroll rod 53 is rotated, the scroll rod 53 sequentially drives the turbine 52, the valve rod 3 and the valve plate 2 to rotate, and when the second fixing block 552 collides with the first fixing block 551 in the initial state again, the valve plate 2 is completely closed. The butterfly valve of the application has good leakproofness, and the occurrence of fluid leakage of the butterfly valve is reduced.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a butterfly valve of high leakproofness, includes valve body (1), its characterized in that: two semicircular valve plates (2) are arranged in the valve body (1), the two valve plates (2) are coplanar, the diameter edges of the two valve plates are end points, a valve rod (3) rotatably connected with the valve body (1) is arranged between the two valve plates (2), the axis of the valve rod (3) is parallel to the diameter edges of the two valve plates (2), one end of the valve rod (3) extends out of the valve body (1) and is provided with a driving mechanism (5) for realizing angle adjustment of the valve plates (2), and sealing mechanisms (4) are respectively arranged between the two valve plates (2) and the valve body (1);

the sealing mechanism (4) comprises a valve seat (41) arranged along the circumferential direction of the valve plate (2), the cross section of the valve seat (41) along the circumferential direction is L-shaped, the valve seat (41) comprises a body (411) fixedly connected with the inner circumferential surface of the valve body (1) and a limiting body (412) fixedly arranged on the inner circumferential surface of the body (411) and abutted against one end of the valve plate (2) in the axial direction, the inner circumferential surface of the body (411) is attached to the outer circumferential surface of the valve plate (2), a rubber pad (42) is arranged between the body (411) and the valve plate (2), an installation groove (4111) matched with the rubber pad (42) is formed in the body (411), a spring (4112) abutted against the side surface of the rubber pad (42) far away from the valve plate (2) is arranged in the installation groove (4111), and the valve seats (41) of the sealing mechanism (4) are fixedly connected at, the two valve plates (2) and the sealing mechanism (4) are axisymmetrical with the valve rod (3) as an axis;

be provided with stopper (4113) on mounting groove (4111) the lateral wall, set up spacing groove (421) with stopper (4113) looks adaptation on rubber pad (42) lateral wall, stopper (4113) is installed in spacing groove (421) to make rubber pad (42) follow disk seat (41) radial slide in spacing groove (421).

2. The butterfly valve with high sealing performance according to claim 1, wherein: the quantity of spring (4112) is a plurality of, a plurality of spring (4112) is along valve seat (41) circumference evenly distributed.

3. The butterfly valve with high sealing performance according to claim 1, wherein: the outer peripheral face of the valve plate (2) is set to be a conical face, and the inner side wall, close to the valve plate (2), of the rubber pad (42) is set to be a conical face matched with the valve plate (2).

4. A butterfly valve with high sealing performance according to claim 3, wherein: a plurality of sealing grooves (422) are formed in the inner circumferential surface of the rubber pad (42) along the axis direction of the valve seat (41), and the sealing grooves (422) are arranged along the circumferential direction of the valve seat (41).

5. The butterfly valve with high sealing performance according to claim 4, wherein: the valve plate (2) is provided with a first sealing block (21) along the peripheral surface of one end with a larger diameter in the axial direction.

6. A butterfly valve with high sealing performance according to claim 5, wherein: a second sealing block (4114) is fixedly arranged between the first sealing block (21) and the rubber pad (42) on the body (411).

7. The butterfly valve with high sealing performance according to claim 1, wherein: the driving mechanism (5) comprises an installation cover (51) fixedly arranged on the outer peripheral surface of the valve body (1) and a turbine (52) fixedly arranged on the outer peripheral surface of the valve rod (3), a worm (53) matched with the turbine (52) is arranged on the turbine (52), and two ends of the worm (53) are rotatably connected to the installation cover (51).

8. The butterfly valve with high sealing performance according to claim 7, wherein: and a limiting assembly (55) used for limiting the rotation angle of the valve plate (2) is arranged in the mounting cover (51).

9. The butterfly valve with high sealing performance according to claim 8, wherein: the limiting assembly (55) comprises two first fixing blocks (551) fixedly arranged on the outer peripheral surface of the valve rod (3) at intervals along the circumferential direction of the valve rod (3), a second fixing block (552) is arranged between the two first fixing blocks (551), the second fixing block (552) is fixedly arranged on the side surface of the turbine (52), and the second fixing block (552) is driven by the turbine (52) to rotate between the two first fixing blocks (551).