CN210266016U

CN210266016U - Vacuum circuit breaker valve

Info

Publication number: CN210266016U
Application number: CN201921254895.6U
Authority: CN
Inventors: 蒋腾; 祝正成; 吴凤仪; 朱丹丹; 张冠平; 吴立标; 何宗取
Original assignee: Zhejiang Carbo Copper Industry Co ltd
Current assignee: Zhejiang Carbo Copper Industry Co ltd
Priority date: 2019-08-05
Filing date: 2019-08-05
Publication date: 2020-04-07
Anticipated expiration: 2029-08-05

Abstract

The utility model provides a vacuum circuit breaker valve belongs to valve manufacturing technical field. The vacuum circuit breaker solves the problems that an existing vacuum circuit breaker is low in adjusting precision, short in service life and the like. The vacuum circuit breaker valve comprises a valve body, a spring, an upper disc, a support and a lower disc, wherein a water inlet is formed in the lower portion of the valve body, a water outlet is formed in the side portion of the valve body, a valve cap with an air inlet hole is connected to the top of the valve body, the spring is located in the valve body and enables the lower disc to always have the trend of being sealed at the inner end of the water inlet, the upper disc is connected with the support into a whole, the lower disc and the support are arranged in a split mode and can play a role in supporting the support when the lower disc and the support do not return, and a guide structure. The utility model has the advantages of prevent the backward flow in time, can avoid the water hammer effect to produce and job stabilization nature is good.

Description

Vacuum circuit breaker valve

Technical Field

The utility model belongs to the technical field of the valve is made, a backflow preventer is related to, in particular to vacuum circuit breaker.

Background

The backflow preventer for preventing water backflow pollution at present mainly has three structural forms: 1. the pressure-reducing backflow preventer consists of two check valves and a pressure reducing valve, has the highest safety coefficient, and can be applied to any occasions where water backflow pollution is prevented; 2. the double-check backflow preventer consists of two check valves and is mainly applied to non-drinking water systems, such as fire-fighting pipelines, farm irrigation and other occasions; 3. a vacuum circuit-breaking valve is mainly applied to drinking water systems, has the requirement of preventing reverse siphon backflow, and is used in occasions without a cut-off valve behind the valve. Namely, the vacuum circuit breaker valve is a valve which can effectively prevent non-drinking water from entering a drinking water pipeline due to the anti-siphon effect and is widely applied to a water delivery pipe network.

For example, chinese patent literature patent discloses an anti-siphon vacuum breaker valve [ application No.: 201010119939.1, respectively; authorization notice number: CN102192332B ], which comprises a valve body, a water inlet, a water outlet, a return spring and a valve core, wherein the valve core comprises an upper disc, a poppet valve and a lower disc, the return spring is arranged between the lower disc and a valve cap and keeps the lower disc to keep the trend of sealing the water inlet downwards, the upper disc is connected with the top end of the poppet valve by a connector, the lower disc is connected with the bottom end of the poppet valve by a bolt in a plugging way, a bearing nut is sleeved on the bolt, the bearing nut is arranged between the lower disc and the poppet valve and is used for supporting the poppet valve, the lower disc is matched with a first valve port, the upper disc is matched with a second valve port, the first valve port is arranged at the water inlet at the lower part.

The anti-siphon vacuum circuit breaker valve has a compact structure and is convenient to assemble due to the fact that the upper disc, the lifting valve and the lower disc are connected with one another, but the upper end of the spring abuts against the bottom surface of the convex edge of the plastic valve cap, the service life of the valve cap is short, the installation and tightening degrees of the valve cap are different, the acting force of the spring on the lower disc is inconsistent, the precision is affected, the elastic force of the spring can deform the bottom surface of the convex edge of the valve cap after the valve cap is used for a period of time, the adjusting precision is affected, the deformation of the convex edge of the valve cap is upwarped, the sealing performance is affected; the hanging wall, poppet valve and lower wall link together and make weight heavier, in addition need cooperate the water pressure regulation and control, the whole regulation precision is not high, when the water inlet does not have the water pressure of intaking or delivery port when the water pressure of water inlet is higher, hanging wall and lower wall move down in step, the speed that the lower wall is sealed in first valve port is not fast enough, the hanging wall breaks away from the second valve port prematurely, the higher water pressure of delivery port leads to water to spray from the second valve port, cause shroud department to damage easily, and quick backward flow impact can form the water hammer effect, to this prevent that siphon vacuum circuit breaker or the water pump on the pipeline cause the water hammer to strike, and service life is shortened.

Chinese patent literature patent also discloses a vacuum breaker valve [ application number: 201120187168. X; authorization notice number: CN202100769U ], the structure of which is substantially the same as that of the anti-siphon vacuum circuit breaker, except that the upper disc of the vacuum circuit breaker is slidably fitted in the through hole of the valve cap, the outer wall of the upper disc is radially and convexly provided with a first limit ring for axially limiting the upper disc, and the upper surface of the first limit ring is provided with a protrusion for locally heightening the upper sealing pad. In addition, chinese patent literature patent also discloses a pressure type vacuum breaker valve [ application number: 201120187176.4, respectively; authorization notice number: CN202100722U ], the structure of which is substantially the same as that of the vacuum interrupter valve described above, except that at least one groove is formed on the bottom end surface of the side wall of the bonnet, the groove penetrating the side wall.

The vacuum circuit-breaking valve and the pressure type vacuum circuit-breaking valve can accelerate the opening speed of the exhaust valve to a certain degree through the protrusion of the upper disc or the groove of the valve cap, but still have the problem that the upper end position of the spring is abutted against the bottom surface of the convex edge of the plastic valve cap, so that the adjusting precision is not high and the sealing performance is not good, and still have the problems that the upper disc, the poppet valve and the lower disc are connected into a whole, so that the weight is heavy, the adjusting precision is not high, the lower disc is not sealed fast enough during backflow, parts are easily damaged at the upper disc, and the water hammer effect is generated.

Disclosure of Invention

The utility model aims at the above-mentioned problem that exists among the prior art, provide a can in time prevent the backward flow, can avoid the vacuum circuit breaker that the water hammer effect produced.

The purpose of the utility model can be realized by the following technical proposal: the utility model provides a vacuum circuit breaker, includes valve body, spring, hanging wall, support, lower wall, the lower part of valve body be equipped with the water inlet, the lateral part of valve body is equipped with the delivery port, the top of valve body is connected with the valve cap that has the inlet port, the spring be located the valve body and make the lower wall have the trend sealed in the inner of water inlet all the time, hanging wall and support fuse, its characterized in that, lower wall and support set up and when not flowing back for the components of a whole that can function independently the lower wall play the bearing effect to the support, valve cap and hanging wall between be equipped with the guide structure who plays the direction to hanging wall axial displacement.

In the vacuum circuit breaker, the guide structure comprises a guide hole axially penetrating through the valve cap, a guide rod penetrates through the guide hole, and the upper disc is provided with an insertion part for the guide rod to be inserted. The guide rod is matched with the guide hole to guide the upper disc, so that the axial displacement of the upper disc is stable.

In the vacuum circuit breaker, the insertion part is a bolt, the bolt penetrates through the upper disc and is in threaded connection with the bracket, the bolt, the upper disc and the bracket are coaxially arranged, the bolt is provided with an insertion hole which is coaxially arranged, and the guide hole is inserted in the insertion hole. The bolt makes hanging wall and leg joint convenient, and the coaxial setting of three makes the structure firm and axial displacement steady.

As another aspect, in the vacuum interrupter valve described above, the guide structure includes a plurality of guide blocks axially protruding and circumferentially and uniformly distributed on the top of the upper plate, the air inlet hole of the bonnet is a circular hole, and the guide blocks are supported on the inner wall of the air inlet hole. The guide block is matched with the air inlet hole to realize the guiding function, and the axial displacement of the upper disc is stable.

In the vacuum circuit breaker, the inner wall of the valve body is provided with a radially outward protruding retaining shoulder, the upper end of the spring abuts against the retaining shoulder, and the lower end of the spring abuts against the lower disc.

In the vacuum interrupter valve, the spring is a tower spring, and the end of the tower spring with a large diameter is the upper end and abuts against the stop shoulder.

In the vacuum circuit breaker valve, a circle of annular plastic gaskets is arranged between the valve cap and the retaining shoulder, and a circle of sealing rings is embedded at the top of the retaining shoulder. The sealing effect has been guaranteed to spacing sealing washer, and plastic gaskets and sealing washer play the dual seal effect for the leakproofness between valve cap and the valve body is good, and plastic gaskets supplies the sealed conflict of hanging wall moreover, and the leakproofness is good.

In a foretell vacuum circuit breaker, the valve cap be the metalwork, the top of valve cap spliced pole that has a plurality of circumference equipartition, the spliced pole have the top cap through screwed connection. The valve cap and the valve body firm in connection of metalwork just are difficult for the damage, long service life, and the top cap passes through the multiple spot with the valve cap and is connected, firm in connection, and the top cap can not be impacted by rivers and drops, and the stability in use is good.

In the vacuum circuit breaker valve, the lower disc is fixedly connected with a support positioned in the water inlet, and the support is provided with supporting legs which are circumferentially and uniformly distributed and supported on the inner wall of the water inlet. The support plays the guide effect to the lower wall, and the lower wall axial displacement is steady.

In the vacuum circuit breaker, the water inlet is connected with a water inlet ball valve, the water inlet ball valve is connected with a water inlet pressure measuring joint, the water outlet is connected with a water outlet ball valve, and the water outlet ball valve is connected with a water outlet pressure measuring joint. Thus, the pressure test of the water inlet and the water outlet is facilitated, and the pipeline connection is facilitated.

Compared with the prior art, the lower disc and the support in the vacuum circuit breaker valve are arranged in a split mode, the lower disc is light in weight and can be matched with water pressure and adjusted and controlled by the spring, high-precision adjusting precision can be obtained, when water is cut off or the water outlet is under high pressure, the lower disc is quickly sealed at the inner end of the water inlet to prevent backflow in time, the upper disc can independently play a sealing role at the moment to prevent water from rapidly leaking from the air inlet hole and prevent water hammer effect caused by rapid backflow, after the water pressure of the water outlet is reduced, the upper disc releases the sealing role, air enters the air inlet hole to prevent vacuum at the water outlet, anti-siphon phenomenon is avoided, water at the water outlet can overflow from the upper disc and the valve cap when overpressure occurs, the pipeline or a water using device is prevented from being damaged due to overh.

Drawings

Fig. 1 is a structural sectional view of the present vacuum breaker valve.

Fig. 2 is an exploded view of the present vacuum interrupter valve.

In the figure, 1, a valve body; 1a, a water inlet; 1b, a water outlet; 1c, a shoulder; 2. a spring; 3. hanging the plate; 3a, a plug part; 4. a support; 5. a bottom wall; 6. a bonnet; 6a, an air inlet hole; 6b, a guide hole; 6c, connecting columns; 7. a guide bar; 8. a plastic gasket; 9. a seal ring; 10. a screw; 11. a top cover; 12. a support; 12a, supporting legs; 13. a water inlet ball valve; 14. a water inlet pressure measuring joint; 15. a water outlet ball valve; 16. go out water pressure measurement joint.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

As shown in fig. 1 and 2, the vacuum circuit breaker comprises a valve body 1, a spring 2, an upper disc 3, a support 4 and a lower disc 5, wherein a water inlet 1a is formed in the lower portion of the valve body 1, a water outlet 1b is formed in the side portion of the valve body 1, a valve cap 6 with an air inlet 6a is connected to the top of the valve body 1, the spring 2 is located in the valve body 1 and enables the lower disc 5 to always have the trend of being sealed at the inner end of the water inlet 1a, the upper disc 3 is connected with the support 4 into a whole, the lower disc 5 and the support 4 are arranged in a split mode, when the vacuum circuit breaker does not flow back, the lower disc 5 plays a supporting role for the support 4, and a guide structure which plays a guide role.

The lower disc 5 and the bracket 4 of the vacuum circuit breaker valve are not connected into a whole, the lower disc 5 is light in weight and can be adjusted and controlled by matching with water pressure and the spring 2, and high-precision adjusting precision can be obtained. When the vacuum circuit breaker valve is used for feeding water, water enters from the water inlet 1a, the lower disc 5 is separated from the inner end of the water inlet 1a by overcoming the elasticity of the spring 2, the water enters the valve body 1 again and flows out from the water outlet 1b, at the moment, the lower disc 5 supports the support 4 to enable the support 4 to drive the upper disc 3 to axially move towards the valve cap 6, the guide structure plays a role in guiding, so that the upper disc 3 and the support 4 are stably axially moved, the upper disc 3 plays a role in sealing the valve cap 6, air is prevented from entering the valve body 1 from the air inlet 6a of the valve cap 6 and overflowing from the valve cap 6, and water flow in a pipeline at the water inlet 1a and the water outlet 1; when water does not enter the water inlet 1a or the water pressure of the water outlet 1b is higher than the water pressure of the water inlet 1a, the water pressure at the water outlet 1b and the elastic force provided by the spring 2 enable the independent and light-weight lower disc 5 to be rapidly sealed at the inner end of the water inlet 1a, so as to prevent backflow in time and avoid water source pollution caused by backflow, at the moment, the upper disc 3 is still sealed on the valve cap 6 under the action of the water pressure, so that water is prevented from rapidly leaking from the air inlet 6a, water hammer effect caused by rapid backflow is avoided, the service lives of a water using device on a pipeline and the vacuum circuit breaker are prolonged, when the pressure below the upper disc 3 is reduced and is close to a set value, air enters from the air inlet 6a and pushes the upper disc 3 to axially displace towards the lower disc 5, so as to avoid the vacuum at the water outlet 1b to generate anti-siphon phenomenon, when the water pressure below the upper disc 3 continuously rises to reach, the pipeline or the water using device is prevented from being damaged due to overhigh water pressure, and the set value and the specified value are set according to the product requirement.

Further saying, guide structure includes the axially through guide hole 6b that valve cap 6 has in this embodiment, 6 middle parts of valve cap have a rib, the rib middle part has the projection, projection axial through guide hole 6b, the rib both sides all have an inlet port 6a, wear to be equipped with guide bar 7 in the guide hole 6b, it has grafting portion 3a that supplies guide bar 7 to peg graft to go up dish 3, grafting portion 3a is the bolt, the bolt pass go up dish 3 and with 4 threaded connection of support and bolt, the coaxial setting of hanging dish 3 and 4 three of support, the bolt has the spliced eye of coaxial setting, guide hole 6b pegs graft in the spliced eye. The guide rod 7 is matched with the guide hole 6b to guide the upper disc 3, so that the upper disc 3 is stable in axial displacement.

The inner wall of the valve body 1 is provided with a radially outward convex retaining shoulder 1c, the upper end of the spring 2 props against the retaining shoulder 1c, and the lower end of the spring 2 props against the lower disc 5. Like this to spring 2's support effect good, the spring 2 is packed into the volume of compression behind the valve body 1 unanimously, and is unanimous to the elastic force of lower wall 5 for the product uniformity is good, and the regulation precision is good, and valve body 1 keeps off the problem that shoulder 1c does not have deformation in addition, and spring 2 job stabilization nature is good, does not have the problem that spring 2 upper end destroyed valve cap 6 in the past in order to influence regulation precision and leakproofness. Spring 2 is the turriform spring in this embodiment, and the tip that the turriform spring diameter is big is the upper end and contradicts on keeping off shoulder 1c, and the more ordinary compression spring of turriform spring can bear bigger pressure like this, and the compression ratio that is linear growth makes the regulation convenient to better adaptation is adjusted in the pressure of lower wall 5 department, long service life.

For good sealing performance, a circle of annular plastic gasket 8 is arranged between the valve cap 6 and the retaining shoulder 1c, and a circle of sealing ring 9 is embedded at the top of the retaining shoulder 1 c. In order to be firmly connected, the bonnet 6 is a metal piece, the bonnet 6 is made of an alloy copper material in the embodiment, the top of the bonnet 6 is provided with three connecting columns 6c which are uniformly distributed in the circumferential direction, and the connecting columns 6c are connected with a top cover 11 through screws 10; in order to ensure that the lower disc 5 has stable axial displacement, the lower disc 5 is fixedly connected with a support 12 positioned in the water inlet 1a, a bolt penetrates through the lower disc 5 and the support 12 from the top of the lower disc 5, the part of the bolt extending out of the support 12 is locked with a nut, and the support 12 is provided with three support legs 12a which are uniformly distributed in the circumferential direction and supported on the inner wall of the water inlet 1 a; in order to connect and measure the pressure conveniently, water inlet 1a is connected with into water ball valve 13, and the ball valve 13 of intaking is connected with into water pressure measurement joint 14, and pressure measurement joint 14 of intaking communicates between ball valve 13 of intaking and water inlet 1a, and delivery port 1b is connected with out water ball valve 15, and it is 16 that ball valve 15 of going out water is connected with out water pressure measurement joint, and it communicates between ball valve 15 of going out water and delivery port 1b to go out water pressure measurement joint 16.

Those not described in detail in this specification are within the skill of the art. The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims

1. A vacuum circuit breaker comprises a valve body (1), a spring (2), an upper disc (3), a bracket (4) and a lower disc (5), a water inlet (1 a) is arranged at the lower part of the valve body (1), a water outlet (1 b) is arranged at the side part of the valve body (1), a valve cap (6) with an air inlet hole (6 a) is connected at the top part of the valve body (1), the spring (2) is positioned in the valve body (1) and ensures that the lower disc (5) always has the tendency of being sealed at the inner end of the water inlet (1 a), the upper disc (3) is connected with the bracket (4) into a whole, it is characterized in that the lower disc (5) and the bracket (4) are arranged in a split way, and the lower disc (5) plays a role in supporting the bracket (4) when the backflow does not occur, a guide structure for guiding the axial displacement of the upper disc (3) is arranged between the valve cap (6) and the upper disc (3).

2. A vacuum interrupter valve according to claim 1, wherein the guiding structure comprises a guiding hole (6 b) axially penetrating the valve cap (6), a guiding rod (7) is inserted into the guiding hole (6 b), and the upper plate (3) has an insertion part (3 a) for inserting the guiding rod (7).

3. The vacuum circuit breaker according to claim 2, wherein the insertion portion (3 a) is a bolt, the bolt passes through the upper plate (3) and is in threaded connection with the bracket (4), the bolt, the upper plate (3) and the bracket (4) are coaxially arranged, the bolt is provided with an insertion hole which is coaxially arranged, and the guide hole (6 b) is inserted into the insertion hole.

4. The vacuum circuit breaker according to claim 1, wherein the guiding structure comprises a plurality of axially protruding and circumferentially distributed guiding blocks on the top of the upper plate (3), the air inlet hole (6 a) of the valve cap (6) is a circular hole, and the guiding blocks are supported on the inner wall of the air inlet hole (6 a).

5. A vacuum interrupter valve as defined in claim 1 or 2 or 3 or 4 wherein the inner wall of the valve body (1) has a radially protruding shoulder (1 c), the upper end of the spring (2) abuts against the shoulder (1 c), and the lower end of the spring (2) abuts against the lower disk (5).

6. A vacuum interrupter valve according to claim 5 wherein the spring (2) is a tower spring having a larger diameter end that abuts the shoulder (1 c).

7. A vacuum interrupter valve according to claim 6 wherein a ring-shaped plastic gasket (8) is provided between the valve cap (6) and the retaining shoulder (1 c), and a ring-shaped sealing ring (9) is embedded on top of the retaining shoulder (1 c).

8. A vacuum interrupter valve according to claim 7 wherein the valve cap (6) is a metal piece, the top of the valve cap (6) has a plurality of connecting posts (6 c) evenly distributed in the circumferential direction, and the connecting posts (6 c) are connected to the top cover (11) through screws (10).

9. A vacuum interrupter valve according to claim 8 wherein the lower plate (5) is attached to a support (12) in the inlet (1 a), the support (12) having support legs (12 a) circumferentially spaced and supported on the inner wall of the inlet (1 a).

10. A vacuum interrupter valve according to claim 9, wherein the water inlet (1 a) is connected to a water inlet ball valve (13), the water inlet ball valve (13) is connected to a water inlet pressure measuring connector (14), the water outlet (1 b) is connected to a water outlet ball valve (15), and the water outlet ball valve (15) is connected to a water outlet pressure measuring connector (16).