CN220930205U - Low torsion butterfly valve - Google Patents

Abstract

The utility model relates to the technical field of regulating valves, in particular to a low-torque butterfly valve. The valve comprises a valve body provided with a through cavity, a sealing ring, a valve clack and a valve rod; the valve clack is provided with a connecting part, the valve rod is connected with the valve clack through the connecting part, and the valve rod is rotationally connected with the valve body; the sealing ring comprises a ring body, one side of the ring body is provided with a convex ring, the inner wall of the through cavity is provided with a first clamping groove, and the convex ring is clamped with the first clamping groove. The utility model overcomes the defect of high cost of the driving device caused by larger resistance of screwing the valve clack in the prior art, increases the local thickness of the sealing ring by arranging the convex ring, increases the local impact force absorption and pressure bearing capacity of the sealing ring under the condition of not increasing the radial thickness of the whole sealing ring, and can reduce the extrusion force born by the valve clack, thereby reducing the screwing resistance of the valve clack; meanwhile, the first buffer bulge and the second buffer bulge are arranged on the sealing ring, so that the extrusion force of the flange ring to the ring body of the sealing ring can be reduced, and the ring body is prevented from buckling deformation to prevent the valve clack from rotating.

Description

Low torsion butterfly valve

Technical Field

The utility model relates to the technical field of regulating valves, in particular to a low-torque butterfly valve.

Background

Butterfly valves are valves that open, close, or regulate the flow of a medium by screwing a valve flap, and are commonly used in large-scale piping systems. The butterfly valve with the detachable sealing ring disclosed in the prior art comprises a valve body, a driving device, a valve rod connected with the driving device, a shaft connected with the valve rod, a butterfly plate fixed on the shaft, a fixing plate attached to the inner wall of the valve body and a sealing ring fixed on the fixing plate, wherein the sealing ring is round; the circumference edge of the butterfly plate is a smooth part.

In the above technical solution, the butterfly plate, that is, the valve clack, transmits torque to the valve clack through the driving device to open or close the butterfly valve. The driving device is used as a power source of the butterfly valve switch, the model of the driving device depends on the torque force of the screwing valve clack, and the butterfly valve with larger screwing torque force corresponds to the required driving device, so that the driving device is larger in size and higher in cost.

For butterfly valves in which the sealing ring is of soft material, factors influencing the screwing resistance of the valve flap mainly include the hardness of the sealing ring and the radial thickness of the sealing ring. When the valve clack is in abutting connection with the sealing ring, the hardness of the sealing ring is larger, the capability of the sealing ring for absorbing impact force and bearing pressure is poorer, the extrusion force on the valve clack is larger, and the resistance for screwing the valve clack is larger; the smaller the radial thickness of the sealing ring, the poorer the capability of the sealing ring to absorb impact force and bear pressure, resulting in the larger the extrusion force from the butterfly valve body, so that the larger the resistance of screwing the valve clack. In order to reduce the resistance of the screwing flap, the flow resistance of the fluid can be increased by increasing the radial thickness of the entire sealing ring, but this in turn reduces the effective flow cross-sectional area of the fluid.

Disclosure of utility model

Aiming at the problem that the cost of a driving device is high due to the fact that the resistance of screwing the valve clack is high in the prior art, the utility model provides a low-torque butterfly valve which can reduce the resistance of screwing the valve clack, and therefore the cost of the driving device is reduced.

In order to solve the technical problems, the technical scheme provided by the utility model is as follows:

The low-torque butterfly valve comprises a valve body provided with a through cavity, a sealing ring, a valve clack and a valve rod, wherein the sealing ring is connected with the valve body; the valve clack is positioned in the through cavity of the valve body and used for opening or closing the through cavity, the valve clack is provided with a connecting part, the valve rod is connected with the valve clack through the connecting part, the valve rod is rotationally connected with the valve body, and the valve rod part is positioned outside the valve body; the sealing ring comprises a ring body which is positioned in the through cavity and is attached to the inner wall of the through cavity, a convex ring is arranged on one side, close to the inner wall of the through cavity, of the ring body, a first clamping groove is formed in the inner wall of the through cavity, and the convex ring is clamped with the first clamping groove; and one side of the valve clack, which is abutted against the ring body, is positioned in the inner cavity of the convex ring in the closed state.

In the technical scheme, the local thickness of the ring body is increased through the convex ring, when the through cavity of the valve body is opened or closed, the resistance to screwing the valve clack comes from the part of the ring body which is locally thickened, and the part of the ring body which is locally thickened has better capability of absorbing impact force and bearing pressure, so that the extrusion force to which the valve clack is subjected can be reduced, and the resistance to screwing the valve clack is reduced. Meanwhile, as the convex ring is arranged on one side of the ring body close to the inner wall of the through cavity, the effective flow cross-sectional area of the fluid is not affected, and therefore the flow resistance of the fluid is not affected.

Preferably, the two ends of the ring body are respectively provided with a first extending structure and a second extending structure which are both positioned outside the through cavity, the first extending structure is abutted with one side of the valve body, and the second extending structure is abutted with the other side of the valve body. When two sides of the valve body are respectively connected with two flange rings in the pipeline system, the first extending structure and the second extending structure can be respectively clamped between the valve body and one flange ring, so that the gap between the valve body and the flange ring is reduced, and the connection tightness of the valve body and the two flange rings is improved.

Preferably, a first abutting part for abutting against the flange ring is arranged on one side of the valve body, and a second abutting part for abutting against the flange ring is arranged on the other side of the valve body; one side of the first extending structure far away from the second extending structure is flush with one side of the first abutting part, which is used for abutting with the flange ring, and one side of the first extending structure far away from the second extending structure is provided with a plurality of first buffer bulges which are used for abutting with the flange ring; one side of the second extending structure far away from the first extending structure is flush with one side of the second abutting part, which is used for abutting with the flange ring, and a plurality of second buffer bulges are arranged on one side of the second extending structure far away from the first extending structure, which is used for abutting with the flange ring. Because when valve body and two flange rings are connected, if two flange rings directly butt respectively on with first extending structure and second extending structure, first extending structure and second extending structure receive the great extrusion force of flange ring respectively and with extrusion force transmission for the circle body, can lead to the circle body to appear warp deformation and hinder the rotation of valve clack, increase and twist the resistance of valve clack. After the first abutting part, the first buffer bulge, the second abutting part and the second buffer bulge 5 are arranged, the first buffer bulge and the second buffer bulge can be abutted by the flange rings respectively, and the buffer flange rings extrude the first extending structure and the second extending structure, so that extrusion force on the ring body is reduced, and buckling deformation of the ring body is avoided.

Preferably, the first buffer bulge and the second buffer bulge are annular, and the axes of the first buffer bulge and the second buffer bulge are coincident with the axis of the through cavity; the outer diameter sizes of the first buffer protrusions are different from each other, and the outer diameter sizes of the second buffer protrusions are different from each other. The annular first buffer bulge and the annular second buffer bulge can further increase the connection tightness of the valve body and the flange ring.

Preferably, the opposite sides of the valve body are respectively provided with a second clamping groove and a third clamping groove; the tail end of the first extension structure is provided with a first clamping protrusion, and the first clamping protrusion is clamped with the second clamping groove; the tail end of the second extending structure is provided with a second clamping protrusion, and the second clamping protrusion is clamped with the third clamping groove. The first clamping bulge and the second clamping bulge are respectively clamped with the second clamping groove and the third clamping groove, so that the first extending structure and the second extending structure are respectively clung to the two sides of the valve body, and the problem that the local warpage of the first extending structure and the second extending structure affects the connection tightness between the valve body and the flange ring is avoided. Besides, the first clamping protrusion and the second clamping protrusion enable the connection between the sealing ring and the valve body to be firmer, and the risk that the sealing ring is separated from the valve body is reduced.

Preferably, the thickness of the side, close to the ring body, of the valve flap is smaller than the thickness of the middle part of the valve flap in the closed state, so that the valve flap has enough strength, and the flow resistance of the fluid in the open state of the valve flap is reduced.

Preferably, an arc-shaped part for abutting against the ring body protrudes from one side, close to the ring body, of the valve clack in the closed state. The arc-shaped part can reduce the friction force between the valve clack and the ring body, thereby further reducing the resistance of screwing the valve clack.

The valve rod and the connecting part can be connected in an adhesive mode, a fixed mode or a clamping mode. Preferably, a fourth clamping groove is formed in the connecting portion, and the valve rod portion penetrates into the fourth clamping groove to be clamped with the fourth clamping groove. Such a structure and connection are simpler, which is advantageous to improve the assembly efficiency when assembling the entire butterfly valve.

Preferably, a handle is connected to the end of the valve rod remote from the valve clack. The handle is manually screwed to screw the valve clack, and the butterfly valve is a manual switch type butterfly valve.

Preferably, one end of the valve rod, which is far away from the valve clack, is connected with a rotary driving mechanism, and the rotary driving mechanism can be one of a motor, a rotary cylinder, a rotary hydraulic cylinder, a synchronous belt transmission mechanism and a gear rack transmission mechanism. The valve rod and the valve clack are driven to rotate through the rotary driving mechanism, and the butterfly valve is an automatic switching type butterfly valve, so that the manpower can be saved compared with a manual switching type butterfly valve.

The utility model has the beneficial effects that: the screwing resistance of the valve clack is small, the local thickness of the sealing ring is increased by arranging the convex ring, the local impact force absorption and pressure bearing capacity of the sealing ring are increased under the condition that the radial thickness of the whole sealing ring is not increased, and the extrusion force born by the valve clack can be reduced, so that the screwing resistance of the valve clack is reduced; the first extending structure and the second extending structure are arranged on the sealing ring, so that the connection tightness between the valve body and the flange ring can be improved; the first buffer bulge and the second buffer bulge are respectively arranged on the first extension structure and the second extension structure, so that the extrusion force of the flange ring to the ring body can be reduced, and the ring body is prevented from buckling deformation to prevent the valve clack from rotating.

Drawings

FIG. 1 is a schematic diagram of a low torque butterfly valve;

FIG. 2 is an exploded view of a low torque butterfly valve;

FIG. 3 is a schematic diagram of a low torque butterfly valve in a closed position;

FIG. 4 is a schematic cross-sectional view of a valve body;

FIG. 5 is a schematic cross-sectional view of a seal ring;

FIG. 6 is a schematic structural view of a seal ring;

FIG. 7 is a schematic diagram of a low torque butterfly valve in an open condition;

FIG. 8 is a schematic diagram of a connection of a low torque butterfly valve to a flange ring;

Fig. 9 is an enlarged schematic view of a portion a in fig. 8.

In the accompanying drawings: 1-a valve body; 101-communicating a cavity; 102-a first clamping groove; 103-a second clamping groove; 104-a third clamping groove; 105-a first abutment; 106-a second abutment; 2-a valve clack; 201-an arc-shaped portion; 3-a valve stem; 4-connecting part; 401-fourth clamping groove; 5-a sealing ring; 501-a ring body; 502-convex ring; 503-a first extension structure; 504-a second extension structure; 505-first buffer protuberance; 506-a second buffer protrusion; 507-first snap-fit protrusions; 508-a second snap-in projection; 509-a through hole; and 6-a flange ring.

Detailed Description

The drawings are for illustrative purposes only and are not to be construed as limiting the present patent; for the purpose of better illustrating the embodiments, certain elements of the drawings may be omitted, enlarged or reduced and do not represent the actual product dimensions; it will be appreciated by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted. The positional relationship depicted in the drawings is for illustrative purposes only and is not to be construed as limiting the present patent.

The same or similar reference numbers in the drawings of embodiments of the utility model correspond to the same or similar components; in the description of the present utility model, it should be understood that, if there are orientations or positional relationships indicated by terms "upper", "lower", "left", "right", "long", "short", etc., based on the orientations or positional relationships shown in the drawings, this is merely for convenience in describing the present utility model and simplifying the description, and is not an indication or suggestion that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, so that the terms describing the positional relationships in the drawings are merely for exemplary illustration and are not to be construed as limitations of the present patent, and that it is possible for those of ordinary skill in the art to understand the specific meaning of the terms described above according to specific circumstances.

The technical scheme of the utility model is further specifically described by the following specific embodiments with reference to the accompanying drawings:

Example 1

The low torque butterfly valve as shown in fig. 1 and 2 comprises a valve body 1 provided with a through cavity 101, a sealing ring 5, a valve clack 2 and a valve rod 3, wherein the sealing ring 5 is connected with the valve body 1; the valve clack 2 is positioned in the through cavity 101 of the valve body 1 and used for opening or closing the through cavity 101, the valve clack 2 is provided with a connecting part 4, the connecting part 4 extends from the top of the valve clack 2 to the bottom of the valve clack 2, the valve clack 2 is rotationally connected with the valve body 1 through the connecting part 4, and the valve rod 3 is connected with the valve clack 2 through being connected with the connecting part 4; the valve rod 3 is rotatably connected with the valve body 1 and the valve rod 3 is partially located outside the valve body 1. Specifically, referring to fig. 3 to 6, the seal ring 5 includes a ring body 501 located in the through cavity 101 and attached to an inner wall of the through cavity 101, and a convex ring 502 is disposed on a side of the ring body 501 close to the inner wall of the through cavity 101; the inner wall of the through cavity 101 is provided with a first clamping groove 102, and the convex ring 502 is clamped with the first clamping groove 102; the side of the valve flap 2, which abuts against the ring body 501 in the closed state, is located in the inner cavity of the convex ring 502. It is understood that the inner cavity of the convex ring 502 refers to a cavity surrounded by the side where the convex ring 502 is connected to the ring body 501. Further, the top and bottom of the ring body 501 are respectively provided with a through hole 509, and the top and bottom of the connecting part 4 are respectively and correspondingly connected with the through hole 509 in a rotating way and are attached to the inner wall of the through hole 509.

Further, both ends of the ring body 501 are respectively provided with a first extension structure 503 and a second extension structure 504 which are both positioned outside the through cavity 101, the first extension structure 503 is abutted with one side of the valve body 1, and the second extension structure 504 is abutted with the other side of the valve body 1.

Further, referring to fig. 4 to 9, both sides of the valve body 1 are respectively provided with a first abutting portion 105 for abutting against one of the flange rings 6 and a second abutting portion 106 for abutting against the other flange ring 6, wherein one side of the first abutting portion 105 abutting against the one flange ring 6 is flush with one side of the first extending structure 503, and one side of the second abutting portion 106 abutting against the other flange ring 6 is flush with one side of the second extending structure. The side of the first extension structure 503 away from the second extension structure 504 is provided with a plurality of first buffer protrusions 505 for abutting against one of the flange rings 6; the side of the second extension structure 504 away from the first extension structure 503 is provided with a plurality of second buffer protrusions 506 for abutting against the other flange ring 6. Since the valve body 1 is connected with the two flange rings 6, if the two flange rings 6 are respectively and directly abutted against the first extension structure 503 and the second extension structure 504, the first extension structure 503 and the second extension structure 504 are respectively subjected to a larger extrusion force of the flange rings 6 and transmit the extrusion force to the ring body 501, the ring body 501 may be deformed to generate buckling, so that the rotation of the valve clack 2 is blocked, and the resistance of screwing the valve clack 2 is increased. After the first abutting portion 105, the first buffer protrusion 505, the second abutting portion 106 and the second buffer protrusion 506 are arranged, the first buffer protrusion 505 and the second buffer protrusion 506 can be abutted against the flange ring 6 respectively, and the buffer flange ring 6 presses the first extension structure 503 and the second extension structure 504, so that the pressing force on the ring body 501 is reduced, and the buckling deformation of the ring body 501 is avoided.

Further, the first buffer protrusion 505 and the second buffer protrusion 506 are both annular, and the axes of the first buffer protrusion and the second buffer protrusion are coincident with the axis of the through cavity 101; the outer diameter sizes of the first buffer protrusions 505 are different from each other, and the outer diameter sizes of the second buffer protrusions 506 are different from each other. The annular first buffer projection 505 and second buffer projection 506 can further increase the connection tightness of the valve body 1 and the flange ring 6.

Further, the opposite sides of the valve body 1 are respectively provided with a second clamping groove 103 and a third clamping groove 104; the tail end of the first extension structure 503 is provided with a first clamping protrusion 507, and the first clamping protrusion 507 is clamped with the second clamping groove 103; the second extending structure 504 is provided with a second locking protrusion 508 at the end, and the second locking protrusion 508 is locked with the third locking slot 104. The first clamping protrusion 507 and the second clamping protrusion 508 are respectively clamped with the second clamping groove 103 and the third clamping groove 104, so that the first extension structure 503 and the second extension structure 504 are respectively clung to two sides of the valve body 1, and the first extension structure 503 and the second extension structure 504 are prevented from being locally warped to influence the connection tightness between the valve body 1 and the flange ring 6. In addition, the first clamping protrusion 507 and the second clamping protrusion 508 further make the connection between the sealing ring 5 and the valve body 1 more firm, so as to reduce the risk that the sealing ring 5 is separated from the valve body 1.

The working principle or workflow of the present embodiment: as shown in fig. 6 and 7, the open state and the closed state of the butterfly valve according to the present embodiment are respectively shown in fig. 6 and 7, such butterfly valve increases the local thickness of the ring body 501 through the convex ring 502, when the through cavity 101 of the valve body 1 is opened or closed, the resistance force applied to screwing the valve clack 2 comes from the part of the ring body 501 that is locally thickened, and the resistance force screwing the valve clack 2 can be reduced due to the better pressure bearing and deformation capability of the part of the ring body 501 that is locally thickened. Meanwhile, since the convex ring 502 is provided on the side of the ring body 501 close to the inner wall of the through cavity 101, the effective flow cross-sectional area of the fluid is not affected, and thus the flow resistance of the fluid is not affected.

The beneficial effects of this embodiment are: the screwing resistance of the valve clack is small, the local thickness of the sealing ring is increased by arranging the convex ring, the local impact force absorption and pressure bearing capacity of the sealing ring are increased under the condition that the radial thickness of the whole sealing ring is not increased, and the extrusion force born by the valve clack can be reduced, so that the screwing resistance of the valve clack is reduced; the first extending structure and the second extending structure are arranged on the sealing ring, so that the connection tightness between the valve body and the flange ring can be improved; the first buffer bulge and the second buffer bulge are respectively arranged on the first extension structure and the second extension structure, so that the extrusion force of the flange ring to the ring body can be reduced, and the ring body is prevented from buckling deformation to prevent the valve clack from rotating.

Example 2

In this embodiment, as shown in fig. 3 and 7, the cross sections of two sides of the valve clack 2 are tapered, and the thickness of one side of the valve clack 2, which is close to the ring body 501, is smaller than the thickness of the middle part of the valve clack 2 in the closed state, so that the valve clack 2 has enough strength, and meanwhile, the flow resistance of fluid in the open state of the butterfly valve is reduced.

Further, the side of the valve flap 2 close to the ring body 501 in the closed state protrudes to the arc-shaped portion 201 for abutting against the ring body 501. The arc portion 201 can reduce friction between the valve flap 2 and the ring body 501, thereby further reducing resistance to screwing the valve flap 2.

Further, as shown in fig. 1 and 2, the connecting portion 4 is provided with a fourth clamping groove 401, and the valve rod 3 partially penetrates into the fourth clamping groove 401 to be clamped with the fourth clamping groove 401. Such a structure and connection are simpler, which is advantageous to improve the assembly efficiency when assembling the entire butterfly valve.

Other features, operation principles, and advantageous effects of this embodiment are the same as those of embodiment 1.

Example 3

In this embodiment, referring to fig. 1, on the basis of embodiment 2, a handle is connected to an end of the valve rod 3 away from the valve clack 2. The handle is manually screwed to screw the valve flap 2, and such a butterfly valve is a manually opened and closed butterfly valve.

Other features, operation principles, and advantageous effects of this embodiment are the same as those of embodiment 2.

Example 4

In this embodiment, referring to fig. 1, on the basis of embodiment 2, one end of the valve rod 3 far away from the valve clack 2 is connected with a rotation driving mechanism, and the rotation driving mechanism may be one of a motor, a rotation cylinder, a rotation hydraulic cylinder, a synchronous belt transmission mechanism and a rack-and-pinion transmission mechanism. The valve rod 3 and the valve clack 2 are driven to rotate through the rotary driving mechanism, and the butterfly valve is an automatic switching type butterfly valve, so that the manpower can be saved compared with a manual switching type butterfly valve.

Other features, operation principles, and advantageous effects of this embodiment are the same as those of embodiment 2.

It is to be understood that the above examples of the present utility model are provided by way of illustration only and not by way of limitation of the embodiments of the present utility model. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the utility model are desired to be protected by the following claims.

Claims (10)

1. The low-torque butterfly valve comprises a valve body (1) provided with a through cavity (101), a sealing ring (5), a valve clack (2) and a valve rod (3), wherein the sealing ring (5) is connected with the valve body (1); the valve clack (2) is positioned in the through cavity (101) of the valve body (1) and used for opening or closing the through cavity (101), the valve clack (2) is provided with a connecting part (4), the valve rod (3) is connected with the valve clack (2) through the connecting part (4), the valve rod (3) is rotationally connected with the valve body (1), and the valve rod (3) is partially positioned outside the valve body (1); the sealing ring (5) comprises a ring body (501) which is positioned in the through cavity (101) and is attached to the inner wall of the through cavity (101), a convex ring (502) is arranged on one side, close to the inner wall of the through cavity (101), of the ring body (501), a first clamping groove (102) is formed in the inner wall of the through cavity (101), and the convex ring (502) is clamped with the first clamping groove (102); the valve clack (2) is positioned in the inner cavity of the convex ring (502) at one side which is abutted against the ring body (501) in the closed state.

2. The low torque butterfly valve according to claim 1, wherein the two ends of the ring body (501) are respectively provided with a first extension structure (503) and a second extension structure (504) which are both positioned outside the through cavity (101), the first extension structure (503) is abutted to one side of the valve body (1), and the second extension structure (504) is abutted to the other side of the valve body (1).

3. A low torque butterfly valve according to claim 2, wherein one side of the valve body (1) is provided with a first abutment (105) for abutment with a flange ring, and the other side is provided with a second abutment (106) for abutment with a flange ring; one side of the first extending structure (503) away from the second extending structure (504) is flush with one side of the first abutting part (105) for abutting with the flange ring, and a plurality of first buffer protrusions (505) for abutting with the flange ring are arranged on one side of the first extending structure (503) away from the second extending structure (504); one side of the second extending structure (504) away from the first extending structure (503) is flush with one side of the second abutting portion (106) abutting against the flange ring, and a plurality of second buffer protrusions (506) abutting against the flange ring are arranged on one side of the second extending structure (504) away from the first extending structure (503).

4. A low torque butterfly valve according to claim 3, wherein the first buffer projection (505) and the second buffer projection (506) are both annular and have axes that coincide with the axis of the through cavity (101); the outer diameter sizes of the first buffer protrusions (505) are different from each other, and the outer diameter sizes of the second buffer protrusions (506) are different from each other.

5. The low-torque butterfly valve according to claim 2, wherein the opposite sides of the valve body (1) are respectively provided with a second clamping groove (103) and a third clamping groove (104); a first clamping protrusion (507) is arranged at the tail end of the first extension structure (503), and the first clamping protrusion (507) is clamped with the second clamping groove (103); the tail end of the second extending structure (504) is provided with a second clamping protrusion (508), and the second clamping protrusion (508) is clamped with the third clamping groove (104).

6. A low torque butterfly valve according to claim 1, wherein the thickness of the side of the flap (2) adjacent to the ring (501) in the closed state is smaller than the thickness of the middle part of the flap (2).

7. The low torque butterfly valve according to claim 6, characterized in that the flap (2) protrudes on the side close to the ring body (501) in the closed state with an arc (201) for abutment with the ring body (501).

8. The low torque butterfly valve according to any one of claims 1 to 7, wherein the connecting portions (4) are each provided with a fourth clamping groove (401), and the valve rod (3) partially penetrates into the fourth clamping grooves (401) to be clamped with the fourth clamping grooves (401).

9. A low torque butterfly valve according to claim 8, wherein the end of the valve stem (3) remote from the valve flap (2) is connected with a handle.

10. A low torque butterfly valve according to claim 8, wherein the end of the valve stem (3) remote from the valve flap (2) is connected with a rotary drive mechanism.