Double-clack wafer check valve

Abstract

The utility model discloses a bivalve wafer check valve which comprises a valve body, an inlet end and an outlet end are arranged on the valve body, an annular boss is arranged in the middle of the valve body, a stop pin is transversely arranged on the valve body in a penetrating mode, and a hinge pin is further installed on the side, facing the outlet end, of the stop pin. A left butterfly plate and a right butterfly plate which are symmetrically arranged are rotationally arranged on the hinge pin, the hinge pin is sleeved with two sets of torsional springs which are pressed on the left butterfly plate and the right butterfly plate, and a supporting seat is arranged at the position, located at the joint of the left butterfly plate and the right butterfly plate, in the valve body; according to the double-clack butt-clamping check valve, the impact force between the butterfly plates and the valve body when the butterfly plates are closed can be reduced, and the service life of the butterfly plates and the service life of the sealing rings are prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, and particularly relates to a double-flap wafer check valve. Background Art

[0002] The wafer double-flap check valve is used in pure pipelines, industrial, environmental protection, water treatment, and high-rise building water supply and drainage pipelines to prevent the reverse flow of the medium. The check valve adopts a wafer type, the butterfly plate is composed of two semi-circles, and is forced to reset by a spring. The sealing surface can be the body surfacing wear-resistant material or lined with rubber. The butterfly plate opens under the action of fluid pressure, and the fluid flows from the inlet side to the outlet side. When the pressure on the inlet side is lower than that on the outlet side, the butterfly plate automatically closes under the action of factors such as fluid pressure difference and its own gravity to prevent the reverse flow of the fluid. The deficiencies in the prior art in use are that when the butterfly plate automatically closes, due to the reduction of the fluid pressure difference, the impact pressure when sealing with the sealing platform in the valve body is too large, resulting in a continuous decline in the sealing effect of the sealing ring and a significant reduction in the service life. Content of the Utility Model

[0003] The purpose of the utility model is to provide a double-flap wafer check valve, which can reduce the impact force of the butterfly plate when closing and improve the service life of the butterfly plate and the sealing ring.

[0004] To achieve the above purpose, the utility model provides the following technical solution: A double-flap wafer check valve, including a valve body, an inlet end and an outlet end are provided on the valve body, a circular boss is arranged in the middle of the valve body, a stop pin is horizontally penetrated through the valve body, a hinge pin is further installed on one side of the stop pin facing the outlet end, a left butterfly plate and a symmetrically arranged right butterfly plate are rotatably arranged on the hinge pin, two groups of torsion springs pressing on the left butterfly plate and the right butterfly plate are sleeved on the hinge pin, a support seat is arranged in the valve body at the connection of the left butterfly plate and the right butterfly plate, and two groups of symmetrically installed buffer components are respectively arranged between the left butterfly plate and the right butterfly plate and the support seat.

[0005] Preferably, an abutting part and a sealing part are arranged on the left butterfly plate, a circular groove is arranged on the left butterfly plate, the sealing part is embedded in the circular groove and forms a tight seal with the circular boss, and one end of the abutting part is connected to the other end of the left butterfly plate and protrudes towards the support seat side.

[0006] Preferably, a T-shaped insertion groove is arranged on the abutting part, the buffer component includes a sealing panel and an elastic member, the sealing panel is inserted into the T-shaped insertion groove, and the elastic member is clamped between the sealing panel and the insertion groove.

[0007] Preferably, a first support leg, a U-shaped part and a second support leg are sequentially arranged on the sealing panel. The first support leg and the second support leg are respectively connected to two sides of the U-shaped part port. A first step and a second step for forming a support fit with the first support leg and the second support leg are arranged on the T-shaped insertion slot. One end of the elastic member is embedded in the U-shaped part groove.

[0008] Preferably, a first mounting hole is formed in the first step, a second mounting hole is correspondingly formed in the first support leg, a first screw hole corresponding to the second mounting hole is formed in the inner wall of the T-shaped insertion slot, a first bolt is arranged in the first mounting hole, and the first bolt sequentially passes through the first mounting hole and the second mounting hole and is screwed into the first screw hole.

[0009] Preferably, a mounting groove is formed in the support seat, a shock-absorbing gasket is embedded in the mounting groove, one end of the shock-absorbing gasket is tightly abutted in the mounting groove, and the other end forms a sealing abutment with one end of the U-shaped part.

[0010] Preferably, two positioning support legs are arranged on one side of the shock-absorbing gasket facing the mounting groove, and positioning grooves adapted to the positioning support legs are formed at the bottom of the mounting groove.

[0011] Compared with the prior art, the beneficial effects of the utility model are as follows: when the fluid decreases, the left butterfly plate and the right butterfly plate rotate towards the side of the annular boss. At this time, the U-shaped part on the abutting part abuts and rubs against the shock-absorbing gasket on the support seat. And with the restoring force of the butterfly plate, the U-shaped part contracts inward by using the elastic member. At the same time, the elastic member releases elastic force to increase the abutting friction force between the U-shaped part and the shock-absorbing gasket. This structure can reduce the impact force of the butterfly plate on the valve body when the butterfly plate is closed, and improve the service life of the butterfly plate and the sealing ring. Description of the Drawings

[0012] Figure 1 is the overall structure sectional view of the utility model;

[0013] Figure 2 is the partial sectional view of the top view of the utility model;

[0014] Figure 3 is the enlarged view of part A of the utility model.

[0015] In the figure: 1, valve body; 2, inlet end; 3, outlet end; 4, annular boss; 5, stop pin; 8, hinge pin; 9, left butterfly plate; 10, right butterfly plate; 11, torsion spring; 12, support seat; 13, buffer assembly; 14, abutting portion; 15, sealing portion; 16, annular groove; 17, T-shaped insertion groove; 18, sealing panel; 19, elastic member; 20, first support leg; 21, U-shaped portion; 23, second support leg; 24, first step; 25, second step; 26, first mounting hole; 27, second mounting hole; 28, first screw hole; 29, first bolt; 30, mounting groove; 31, shock-absorbing gasket; 32, positioning support leg; 33, positioning groove. Detailed implementation mode

[0016] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0017] Embodiment: As shown in the attached Figures 1 to 3 figure, a double-flap wafer check valve includes a valve body 1. An inlet end 2 and an outlet end 3 are provided on the valve body 1. An annular boss 4 is arranged in the middle of the valve body 1. A stop pin 5 is horizontally penetrated through the valve body 1. A hinge pin 8 is further installed on one side of the stop pin 5 facing the outlet end 3. A left butterfly plate 9 and symmetrically arranged right butterfly plates 10 are rotatably arranged on the hinge pin 8. Two groups of torsion springs 11 that are pressed on the left butterfly plate 9 and the right butterfly plate 10 are sleeved on the hinge pin 8. A support seat 12 is arranged inside the valve body 1 at the connection of the left butterfly plate 9 and the right butterfly plate 10. Two groups of symmetrically installed buffer assemblies 13 are respectively arranged between the left butterfly plate 9 and the right butterfly plate 10 and the support seat 12. When the fluid decreases, the left butterfly plate 9 and the right butterfly plate 10 rotate towards the annular boss 4. At this time, the U-shaped portion 21 on the abutting portion 14 forms an abutting friction with the shock-absorbing gasket 31 on the support seat 12. And with the restoring force of the butterfly plate, the U-shaped portion 21 contracts inwards by using the elastic member 19. At the same time, the elastic member 19 releases elastic force to increase the abutting friction force between the U-shaped portion 21 and the shock-absorbing gasket. This structure can reduce the impact force of the butterfly plate on the valve body 1 when closing, and improve the service life of the butterfly plate and the sealing ring.

[0018] As shown in the attached Figure 1As shown, the left butterfly plate 9 is provided with an abutment portion 14 (an integrated structure) and a sealing portion 15 (specifically made of rubber material), an annular groove 16 is opened on the left butterfly plate 9, the sealing portion 15 is embedded in the annular groove 16 and forms a tight seal with the annular boss 4, one end of the abutment portion 14 is connected to the other end of the left butterfly plate 9, and protrudes toward one side of the support seat 12, and forms a sealing fit with the annular boss 4 through the sealing portion 15, and the protrusion of the abutment portion 14 prevents the structure from being stuck during rotation.

[0019] As attached Figure 3 As shown, a T-shaped plug-in groove 17 is provided on the abutting portion 14, and the buffer assembly 13 includes a sealing panel 18 and an elastic member 19 (specifically a pressure spring). The sealing panel 18 is plugged into the T-shaped plug-in groove 17, and the elastic member 19 is clamped between the sealing panel 18 and the plug-in groove, so that the sealing panel 18 can be telescoped in the T-shaped plug-in groove 17 through the elastic member 19.

[0020] As attached Figure 3 As shown, the sealing panel 18 is provided with a first leg 20, a U-shaped portion 21 and a second leg 23 (an integrated structure) in sequence, the first leg 20 and the second leg 23 are respectively connected to the positions on both sides of the port of the U-shaped portion 21, the T-shaped plug-in slot 17 is provided with a first step 24 and a second step 25 that form a support cooperation with the first leg 20 and the second leg 23, one end of the elastic member 19 is embedded in the groove of the U-shaped portion 21, and the first leg 20 and the second leg 23 are used to play a positioning support role, and the U-shaped portion 21 can limit the telescopic stroke of the elastic member 19, so as to stabilize the telescopic effect of the elastic member 19.

[0021] As attached Figure 3 As shown, the first step 24 is provided with a first mounting hole 26, the first support leg 20 is correspondingly provided with a second mounting hole 27, the inner wall of the T-shaped plug-in slot 17 is provided with a first screw hole 28 corresponding to the second, the first mounting hole 26 is provided with a first bolt 29, the first bolt 29 passes through the first mounting hole 26 and the second mounting hole 27 in sequence and is tightened in the first screw hole 28 (the right butterfly plate 10 adopts the same structural installation arrangement), the sealing panel 18 passes through the second mounting hole 27 provided by the first support leg 20, so that the telescopic stroke is limited to avoid shaking left and right during operation, and at the same time the first bolt 29 plays a fixing role to prevent the sealing panel 18 from sliding out from both sides.

[0022] As attached Figure 3 As shown, a mounting groove 30 is opened on the support seat 12, and a shock-absorbing gasket 31 is embedded in the mounting groove 30. One end of the shock-absorbing gasket 31 is tightly set in the mounting groove 30, and the other end forms a sealing press with one end of the U-shaped portion 21, thereby increasing the pressure friction with the U-shaped portion 21 and reducing the wear of the U-shaped portion 21.

[0023] As shown in the attached Figure 3 figure, the shock-absorbing gasket 31 (specifically made of rubber material) is provided with two positioning feet 32 (integral structure) on the side facing the mounting groove 30. The bottom of the mounting groove 30 is provided with a positioning groove 33 adapted to the positioning feet 32, which can prevent the shock-absorbing gasket 31 from falling off and has a good fixing effect.

[0024] In the present utility model, terms such as "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "side", "bottom", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the attached drawings. They are only relational terms determined for the convenience of describing the structural relationship of each component or element of the present utility model, and do not specifically refer to any component or element in the present utility model, and should not be construed as a limitation to the present utility model.

Claims

1. A double-flap wafer check valve, comprising a valve body (1), an inlet end (2) and an outlet end (3) are provided on the valve body (1), and an annular boss (4) is arranged in the middle of the valve body (1), characterized in that: A stop pin (5) is transversely penetrated through the valve body (1). A hinge pin (8) is further installed on one side of the stop pin (5) facing the outlet end (3). A left butterfly plate (9) and symmetrically arranged right butterfly plates (10) are rotatably arranged on the hinge pin (8). Two groups of torsion springs (11) that are pressed against the left butterfly plate (9) and the right butterfly plates (10) are sleeved on the hinge pin (8). A support seat (12) is arranged inside the valve body (1) at the connection of the left butterfly plate (9) and the right butterfly plates (10). Two groups of symmetrically installed buffer components (13) are respectively arranged between the left butterfly plate (9) and the right butterfly plates (10) and the support seat (12). An abutting portion (14) and a sealing portion (15) are arranged on the left butterfly plate (9). An annular groove (16) is formed on the left butterfly plate (9). The sealing portion (15) is embedded in the annular groove (16) and forms a pressing seal with the annular boss (4). One end of the abutting portion (14) is connected to the other end of the left butterfly plate (9) and protrudes towards the side of the support seat (12). A T-shaped plugging groove (17) is formed on the abutting portion (14). The buffer component (13) includes a sealing panel (18) and an elastic member (19). The sealing panel (18) is plugged in the T-shaped plugging groove (17). The elastic member (19) is clamped between the sealing panel (18) and the plugging groove.

2. The double-flap wafer check valve according to claim 1, wherein: A first support leg (20), a U-shaped portion (21), and a second support leg (23) are sequentially arranged on the sealing panel (18). The first support leg (20) and the second support leg (23) are respectively connected to both sides of the port of the U-shaped portion (21). A first step (24) and a second step (25) that form a support fit with the first support leg (20) and the second support leg (23) are arranged on the T-shaped plugging groove (17). One end of the elastic member (19) is embedded in the groove of the U-shaped portion (21).

3. The double-flap wafer check valve according to claim 2, wherein: A first mounting hole (26) is formed in the first step (24). A second mounting hole (27) is correspondingly formed in the first support leg (20). A first screw hole (28) corresponding to the second one is formed on the inner wall of the T-shaped plugging groove (17). A first bolt (29) is arranged in the first mounting hole (26). The first bolt (29) sequentially passes through the first mounting hole (26), the second mounting hole (27) and is screwed into the first screw hole (28).

4. A double-flap wafer check valve according to claim 3, characterized in that: An installation groove (30) is formed on the support seat (12). A shock-absorbing gasket (31) is embedded in the installation groove (30). One end of the shock-absorbing gasket (31) is tightly pressed in the installation groove (30), and the other end forms a sealing press fit with one end of the U-shaped portion (21).

5. A double-flap wafer check valve according to claim 4, characterized in that: Two positioning support legs (32) are arranged on one side of the shock-absorbing gasket (31) facing the installation groove (30). A positioning groove (33) adapted to the positioning support legs (32) is formed at the bottom of the installation groove (30).

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