CN221196184U - Stop valve with non-return function - Google Patents

Abstract

The utility model discloses a stop valve with a check function, which comprises a check component, wherein the check component comprises a fixed frame, the outer side wall of the fixed frame is attached to the inner wall of a water outlet cavity, a communication cavity communicated with the water outlet cavity is arranged in the fixed frame, movable baffles for opening or closing the communication cavity are also arranged in the fixed frame through axisymmetric rotation, one ends, close to each other, of the two movable baffles are connected with the same spring, and one end, far away from the spring, of the fixed frame is also provided with a limiting plate. According to the utility model, through the arranged check assembly, when reverse water flow passes through the check assembly in the water outlet cavity, the two movable baffles are mutually far away from each other by the force of the water flow, the spring stretches until the movable baffles are in a vertical state and are propped against the limiting plate, at the moment, the movable baffles block the communication cavity, the reverse water flow cannot pass through, a check effect is achieved, and pollution on the upstream of a pipeline caused by backflow is avoided.

Description

Stop valve with non-return function

Technical Field

The utility model belongs to the technical field of stop valves, and particularly relates to a stop valve with a check function.

Background

The shut-off valve is also called a shut-off valve, and belongs to a forced sealing type valve, so that when the valve is closed, pressure is applied to a valve clack to force a sealing surface not to leak, and the shut-off valve is one of the most widely used valves.

In the prior art, the traditional stop valve has single function and no check function, and when the stop valve is in an open state, fluid in an outlet cavity is likely to flow back, and the fluid easily enters the upstream of a pipeline to cause pollution.

Disclosure of utility model

Aiming at the problems in the prior art, the utility model provides the following technical scheme:

The utility model provides a stop valve with a non-return function, which comprises a valve body and a valve cover, wherein the valve body is connected to the bottom end of the valve cover through bolts, a valve rod is arranged in the valve cover and the valve body in a telescopic manner, the bottom end of the valve rod extends into the valve body and is fixedly connected with a valve clack, the bottom end of the valve clack is positioned on the inner wall of the valve body and is tightly attached with a valve hole, and the top end of the valve rod is provided with a telescopic assembly;

A water inlet cavity is arranged in the valve body below the valve hole, a water outlet cavity is arranged above the valve hole in the valve body, and a check assembly is arranged in the water outlet cavity;

The non-return subassembly is including fixed frame, the lateral wall of fixed frame is laminated mutually with the inner wall of play water cavity, fixed frame inside is provided with the intercommunication chamber that is linked together with play water cavity, fixed frame inside is still provided with the adjustable fender that opens or seal the intercommunication chamber through axisymmetric rotation, two the one end that adjustable fender is close to each other is connected with same spring, the one end that the spring was kept away from to fixed frame still is provided with the limiting plate.

As the preference of above-mentioned technical scheme, the telescopic subassembly includes the hand wheel, the hand wheel sets up the top outside the valve gap, the bottom fixedly connected with of hand wheel rotates the screw rod of being connected with the valve gap, the bottom threaded connection of screw rod has the sleeve with the vertical direction sliding connection of valve gap inner wall, telescopic bottom and valve rod fixed connection.

As the optimization of the technical scheme, the sealing strips are fixedly arranged at the ends of the movable baffle, which are far away from the shafts.

As the optimization of the technical scheme, a sleeve limiting piece for preventing the screw from being separated is arranged inside the sleeve which is in threaded sleeve connection with the bottom end of the screw.

The beneficial effects of the utility model are as follows:

According to the utility model, through the arranged check assembly, when reverse water flow passes through the check assembly in the water outlet cavity, the two movable baffles are mutually far away from each other by the force of the water flow, the spring stretches until the movable baffles are in a vertical state and are propped against the limiting plate, at the moment, the movable baffles block the communication cavity, the reverse water flow cannot pass through, a check effect is achieved, and pollution on the upstream of a pipeline caused by backflow is avoided.

Drawings

FIG. 1 shows an overall schematic of a shut-off valve in an embodiment;

FIG. 2 illustrates a front view of an embodiment abort back component;

FIG. 3 illustrates a cross-sectional view of an embodiment stop back assembly;

Reference numerals: 11. a valve body; 12. a valve cover; 13. a valve stem; 14. a valve flap; 15. a valve hole; 16. a water inlet cavity; 17. a water outlet cavity; 21. a screw; 22. a sleeve; 23. a hand wheel; 30. a non-return assembly; 31. a fixed frame; 32. a communication chamber; 33. a shaft; 34. a movable baffle; 35. a spring; 36. a limiting plate; 37. and (5) a sealing strip.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the present utility model will be clearly and completely described below with reference to the embodiments.

Examples

As shown in fig. 1, fig. 1 is a schematic view of the whole of the shutoff valve in the embodiment.

The device comprises a valve body 11 and a valve cover 12, wherein the valve body 11 is connected with the bottom end of the valve cover 12 through bolts, a valve rod 13 is arranged in the valve cover 12 and the valve body 11 in a telescopic manner, the bottom end of the valve rod 13 extends to the inside of the valve body 11 and is fixedly connected with a valve clack 14, the bottom end of the valve clack 14 is located on the inner wall of the valve body 11 and is tightly attached with a valve hole 15, and a telescopic assembly is arranged at the top end of the valve rod 13.

The telescopic component drives the valve rod 13 and the valve clack 14 to move up and down, so that the valve hole 15 is opened or closed, and the stable stopping operation of liquid can be realized through the mutual cooperation of the valve clack 14 and the valve hole 15.

The telescopic assembly comprises a hand wheel 23, the hand wheel 23 is arranged above the valve cover 12, the bottom end of the hand wheel 23 is fixedly connected with a screw rod 21 rotationally connected with the valve cover 12, the bottom end of the screw rod 21 is in threaded connection with a sleeve 22 which is in sliding connection with the inner wall of the valve cover 12 in the vertical direction, and the bottom end of the sleeve 22 is fixedly connected with the valve rod 13.

The sleeve 22 which is in threaded sleeve connection with the bottom end of the screw 21 is internally provided with a limiting piece of the sleeve 22 for preventing the screw 21 from being separated, and the hand wheel 23 is rotated to drive the screw 21 to rotate, so that the sleeve 22, the valve rod 13 and the valve clack 14 are driven to move up and down.

A water inlet cavity 16 is arranged in the valve body 11 below the valve hole 15, a water outlet cavity 17 is arranged above the valve hole 15 in the valve body 11, and a check assembly 30 is further arranged in the water outlet cavity 17.

The liquid flows from the water inlet cavity 16 to the water outlet cavity 17, and the check assembly 30 performs a check operation on the liquid flowing reversely in the water outlet cavity 17.

As shown in fig. 2 and 3, fig. 2 is a front view of the embodiment suspension loop assembly, and fig. 3 is a cross-sectional view of the embodiment suspension loop assembly.

The non-return assembly 30 comprises a fixed frame 31, the outer side wall of the fixed frame 31 is attached to the inner wall of the water outlet cavity 17, a communication cavity 32 communicated with the water outlet cavity 17 is arranged inside the fixed frame 31, movable baffles 34 for opening or closing the communication cavity 32 are symmetrically arranged inside the fixed frame 31 in a rotating mode through shafts 33, and one ends, close to each other, of the two movable baffles 34 are connected with the same spring 35.

The fixed frame 31 is kept away from the one end of spring 35 and still is provided with limiting plate 36, and the movable baffle 34 is kept away from the one end of axle 33 and is all fixed and be provided with sealing strip 37.

In the state of no water flow, both movable baffles 34 are vertical and close the communicating cavity 32, when water flow passes through, the movable baffles 34 are pushed to compress the spring 35 when water flow from the water inlet cavity 16 to the water outlet cavity 17 passes through the check assembly 30, and the communicating cavity 32 is opened, so that the water flow normally passes through. When the reverse water flows through the check assembly 30, the force of the water flow makes the two movable baffles 34 far away from each other until the movable baffles 34 are in the original vertical state and keep the state of closing the communication cavity 32 under the cooperation of the limiting plates 36, and at this time, the movable baffles 34 block the communication cavity 32, so that the reverse water flow cannot pass through and the check effect is achieved. The sealing strip 37 makes the effect that the movable baffle 34 blocks the communication cavity 32 better.

Working principle: when the stop valve works, the hand wheel 23 is rotated to drive the screw 21 to rotate, the sleeve 22, the valve rod 13 and the valve clack 14 are driven to move up and down, the valve hole 15 can be opened and closed, the normal flowing direction of liquid is from the water inlet cavity 16 to the water outlet cavity 17, and the check assembly 30 performs check operation on the liquid flowing reversely in the water outlet cavity 17. When water flows through the check assembly 30, the movable baffle 34 is pushed to compress the spring 35 when the water flows from the water inlet cavity 16 to the water outlet cavity 17 and passes through the check assembly 30, the communication cavity 32 is opened, the water flows normally, and when reverse water flows through the check assembly 30, the two movable baffles 34 are separated from each other by the force of the water flow until the movable baffle 34 is restored to the original vertical state, and the state of closing the communication cavity 32 is kept under the cooperation of the limiting plate 36, at the moment, the movable baffle 34 can not pass through due to the blocking of the communication cavity 32, and the reverse water flow has a check effect.

The above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting.

Claims (4)

1. The stop valve with the non-return function is characterized by comprising a valve body (11) and a valve cover (12), wherein the valve body (11) is connected with the bottom end of the valve cover (12) through bolts, a valve rod (13) is arranged in the valve cover (12) and the valve body (11) in a telescopic manner, the bottom end of the valve rod (13) extends to the inside of the valve body (11) and is fixedly connected with a valve clack (14), the bottom end of the valve clack (14) is positioned on the inner wall of the valve body (11) and is tightly attached with a valve hole (15), and a telescopic assembly is arranged at the top end of the valve rod (13);

A water inlet cavity (16) is formed in the valve body (11) and below the valve hole (15), a water outlet cavity (17) is formed in the valve body (11) above the valve hole (15), and a check assembly (30) is arranged in the water outlet cavity (17);

The check assembly (30) comprises a fixed frame (31), the outer side wall of the fixed frame (31) is attached to the inner wall of the water outlet cavity (17), a communication cavity (32) communicated with the water outlet cavity (17) is arranged inside the fixed frame (31), movable baffles (34) for opening or closing the communication cavity (32) are further arranged inside the fixed frame (31) in a symmetrical rotation mode through shafts (33), one ends, close to each other, of the two movable baffles (34) are connected with the same spring (35), and one end, away from the spring (35), of the fixed frame (31) is further provided with a limiting plate (36).

2. The stop valve with the non-return function according to claim 1, wherein the telescopic component comprises a hand wheel (23), the hand wheel (23) is arranged above the outside of the valve cover (12), a screw rod (21) rotationally connected with the valve cover (12) is fixedly connected with the bottom end of the hand wheel (23), a sleeve (22) which is slidingly connected with the inner wall of the valve cover (12) in the vertical direction is connected with the bottom end of the screw rod (21) in a threaded manner, and the bottom end of the sleeve (22) is fixedly connected with the valve rod (13).

3. The stop valve with the non-return function according to claim 1, wherein sealing strips (37) are fixedly arranged at one ends of the movable baffle plates (34) away from the shafts (33).

4. The stop valve with the non-return function according to claim 2, wherein a limiting piece of the sleeve (22) for preventing the screw (21) from being separated is arranged inside the sleeve (22) in threaded sleeve connection with the bottom end of the screw (21).