CN220185925U

CN220185925U - Check valve

Info

Publication number: CN220185925U
Application number: CN202321962112.6U
Authority: CN
Inventors: 董宏攀; 董林霞
Original assignee: Lishui Qingshan Valve Co ltd
Current assignee: Lishui Qingshan Valve Co ltd
Priority date: 2023-07-25
Filing date: 2023-07-25
Publication date: 2023-12-15
Anticipated expiration: 2033-07-25

Abstract

The utility model relates to a check valve, which comprises a valve body, a valve cover, a valve seat and a valve clack assembly, and is characterized in that: the valve clack assembly comprises a connecting plate fixedly connected to the valve cover through bolts, a rocker arm rotatably connected to a connecting rod of the connecting plate and a valve clack connected to the rocker arm, the valve seat is symmetrically arranged on two sides of the middle part of a flow passage of the valve body, and the valve seat is obliquely arranged and is in sealing fit with the valve clack. According to the utility model, the rocker arm is directly and detachably connected to the valve cover, and the valve seats matched with the valve clack are symmetrically arranged on the two sides of the flow channel, so that when the same pipeline needs medium reverse control, the valve cover is only required to be loosened, the valve cover is rotated 180 degrees to be installed, the medium reverse control can be realized, the operation is convenient, and the adaptation capability is stronger.

Description

Check valve

Technical Field

The utility model relates to the technical field of check valves, in particular to a check valve.

Background

The check valve is a valve with a circular valve clack as an opening and closing part and can stop the medium from flowing backwards by the action of the self weight and the medium pressure. The flap motion mode is divided into a lifting type and a swing type. The lifting check valve is similar to a stop valve in structure, and only lacks a valve rod for driving the valve clack. The medium flows in from the inlet end and flows out from the outlet end. When the inlet pressure is greater than the sum of the valve flap weight and its flow resistance, the valve is opened. Otherwise, the valve is closed when the medium flows backwards.

The swing check valve mainly comprises a valve body, a valve cover, and a valve clack connected with the valve body through a rocker arm, wherein the valve clack is in sealing fit with a valve seat in the valve body. For a specific structure, reference may be made to a swing check valve disclosed in CN2022226668264 (it should be emphasized that the above reference does not represent an absolute prior art, but is merely for the purpose of aiding in explaining the technical problem to be solved by the present utility model, and emphasizes the original purpose of improvement of the present utility model). The check valve with the above structure is provided on one side of the valve flap, and the medium can only enter the right end from the left end (the left end and the right end are referred to in the description of fig. 1 of the above-mentioned reference patent), and cannot be used reversely. When the same pipeline needs to exchange the medium flow direction, the check valve needs to be disassembled for use, and the disassembly and the use are inconvenient.

Disclosure of Invention

In view of the deficiencies in the prior art, the present utility model provides a check valve.

The technical scheme adopted by the utility model is as follows: the check valve comprises a valve body, a valve cover, a valve seat and a valve clack assembly, wherein the valve clack assembly comprises a connecting plate fixedly connected to the valve cover through bolts, a rocker arm rotatably connected to a connecting rod of the connecting plate and a valve clack connected to the rocker arm, the valve seat is symmetrically arranged on two sides of the middle part of a runner of the valve body, and the valve seat is obliquely arranged and is in sealing fit with the valve clack.

Further, a ball rod is arranged at one end, far away from the connecting plate, of the rocker arm, and the ball rod is rotationally connected with the valve clack.

Further, a graphite sealing ring is arranged between the valve seat and the valve body.

Further, air bag plates are arranged in the flow channels at two sides of the valve seat, and air bags are fixed on the air bag plates.

Further, a water baffle is arranged on the outer side of the valve seat.

Further, the valve clack assembly lifting device further comprises a lifting mechanism for lifting the valve clack assembly, the lifting mechanism comprises a screw rod, a handle and a circular tray, one end of the screw rod is arranged outside the valve body and connected with the handle, the other end of the screw rod penetrates through the valve body and stretches into the valve body to be connected with the circular tray, and the screw rod is in threaded connection with a screw hole on the valve body.

Further, a packing cavity is arranged in the valve body above the screw hole, sealing packing is filled in the packing cavity, and a packing cover is connected to the packing cavity in a threaded manner.

The beneficial effects of the utility model are as follows: according to the utility model, the rocker arm is directly and detachably connected to the valve cover, and the valve seats matched with the valve clack are symmetrically arranged on the two sides of the flow channel, so that when the same pipeline needs medium reverse control, the valve cover is only required to be loosened, the valve cover is rotated 180 degrees to be installed, the medium reverse control can be realized, the operation is convenient, and the adaptation capability is stronger.

In addition to the objects, features and advantages described above, the present utility model has other objects, features and advantages.

The utility model will be described in further detail with reference to the accompanying drawings.

Drawings

Fig. 1 is a schematic structural view of the present utility model.

In fig. 1: 1. a valve body; 2. a valve cover; 3. a valve seat; 4. a connecting plate; 5. a connecting rod; 6. a rocker arm; 7. a valve flap; 8. a valve seat; 9. a cue; 10. a graphite seal ring; 11. an airbag plate; 12. an air bag; 13. a water baffle; 14. a screw; 15. a handle; 16. a circular tray; 17. a screw hole; 18. a filler cavity; 19. sealing filler; 20. and a filler cover.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that, if directional indications (such as up, down, left, right, front, and rear … …) are included in the embodiments of the present utility model, the directional indications are merely used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are correspondingly changed.

The utility model provides a check valve.

In this embodiment, referring to fig. 1, the check valve comprises a valve body 1, a valve cover 2, a valve seat 3 and a valve clack assembly, wherein the valve clack assembly comprises a connecting plate 4 fixedly connected to the valve cover through bolts, a rocker arm 6 rotatably connected to a connecting rod 5 of the connecting plate and a valve clack 7 connected to the rocker arm, the valve seat 8 is symmetrically arranged on two sides of the middle part of a runner of the valve body, and the valve seat is obliquely arranged and is in sealing fit with the valve clack.

According to the utility model, the rocker arm is directly and detachably connected to the valve cover, and the valve seats matched with the valve clack are symmetrically arranged on the two sides of the flow channel, so that when the medium is required to be reversely controlled in the same pipeline, the valve cover is only required to be loosened, the valve cover is rotated by 180 degrees to be installed, the reverse control of the medium can be realized, the operation is convenient, and the adaptation capability is stronger.

Specifically, the one end that the rocking arm was kept away from the connecting plate is equipped with club 9, club and valve clack swivelling joint.

The rocker arm is movably matched with the valve clack, so that the valve clack has self-adapting capability and can be better matched with the valve seat in a sealing way,

specifically, a graphite sealing ring 10 is arranged between the valve seat and the valve body.

By arranging the graphite sealing ring, the tightness between the valve seat and the valve body gap is improved.

Specifically, an air bag plate 11 is arranged in the flow channels at two sides of the valve seat, and an air bag 12 is fixed on the air bag plate.

Because the valve clack and the rocker arm are mostly made of metal, the weight is heavier, and when the pressure of a medium is insufficient, the valve clack return cover can emit larger noise on the valve seat.

Specifically, a water baffle 13 is arranged on the outer side of the valve seat.

The water baffle can prevent the medium from directly impacting the valve seat, so that the service life of the valve seat is prolonged.

The valve comprises a valve body, a valve clack assembly, a lifting mechanism and a valve body, wherein the valve clack assembly is lifted by the lifting mechanism, the lifting mechanism comprises a screw rod 14, a handle 15 and a circular tray 16, one end of the screw rod is arranged outside the valve body and connected with the handle, the other end of the screw rod penetrates through the valve body and stretches into the valve body to be connected with the circular tray, and the screw rod is in threaded connection with a screw hole 17 on the valve body; a packing cavity 18 is arranged in the valve body above the screw hole, sealing packing 19 is filled in the packing cavity, and a packing cover 20 is connected to the packing cavity in a threaded manner.

In the technical scheme, the working principle of the check valve is that the valve plate is pressed on the valve seat by utilizing the dead weight of the valve clack to realize sealing, and after the medium pressure is lost, the check valve is in a closed state and cannot be realized if the medium is required to flow at a low speed. According to the utility model, the protrusion mechanism is arranged, and the valve clack can be lifted by a certain angle through the operation handle, so that a small amount of medium can flow through the valve clack.

The skilled person will know: while the utility model has been described in terms of the foregoing embodiments, the inventive concepts are not limited to the utility model, and any modifications that use the inventive concepts are intended to be within the scope of the appended claims.

Claims

1. A check valve comprising a valve body, a valve cover, a valve seat and a clack assembly, characterized in that: the valve clack assembly comprises a connecting plate fixedly connected to the valve cover through bolts, a rocker arm rotatably connected to a connecting rod of the connecting plate and a valve clack connected to the rocker arm, the valve seat is symmetrically arranged on two sides of the middle part of a flow passage of the valve body, and the valve seat is obliquely arranged and is in sealing fit with the valve clack.

2. The check valve of claim 1, wherein: the one end that the rocking arm was kept away from the connecting plate is equipped with the club, club and valve clack swivelling joint.

3. The check valve of claim 1, wherein: and a graphite sealing ring is arranged between the valve seat and the valve body.

4. A check valve according to any one of claims 1-3, wherein: and air bag plates are arranged in the flow channels at two sides of the valve seat, and air bags are fixed on the air bag plates.

5. A check valve according to any one of claims 1-3, wherein: and a water baffle is arranged on the outer side of the valve seat.

6. A check valve according to any one of claims 1-3, wherein: the valve body is characterized by further comprising a lifting mechanism for lifting the valve clack assembly, the lifting mechanism comprises a screw rod, a handle and a circular tray, one end of the screw rod is arranged outside the valve body and connected with the handle, the other end of the screw rod penetrates through the valve body and stretches into the valve body to be connected with the circular tray, and the screw rod is in threaded connection with a screw hole on the valve body.

7. The check valve of claim 6, wherein: a packing cavity is arranged in the valve body above the screw hole, sealing packing is filled in the packing cavity, and a packing cover is connected to the packing cavity through threads.