CN220540344U

CN220540344U - Stop valve with non-return function

Info

Publication number: CN220540344U
Application number: CN202321476558.8U
Authority: CN
Inventors: 韩宏桥; 王德伟; 周涛
Original assignee: Dalian Shuntian Xingda Special Valve Co ltd
Current assignee: Dalian Shuntian Xingda Special Valve Co ltd
Priority date: 2023-06-10
Filing date: 2023-06-10
Publication date: 2024-02-27
Anticipated expiration: 2033-06-10

Abstract

The utility model relates to the technical field of stop valves, in particular to a stop valve with a non-return function. According to the utility model, the check block and the limiting ring are arranged in the liquid inlet cavity of the valve body, when the stop valve is closed, the valve core is in sealing contact with the liquid inlet cavity and the liquid outlet cavity at two sides, and the liquid inlet cavity is blocked by the check, so that the liquid inlet cavity can be subjected to double backflow prevention and check protection, and liquid is prevented from flowing backwards from the liquid outlet cavity. When the stop valve is opened, the valve core leaves the bottom end inside the valve body, the first guide hole and the second guide hole are used for sealing, backflow of internal liquid can be prevented, liquid is prevented from entering the valve pipe to erode the inner wall of the valve pipe and part of the valve rod, and external water flow and water vapor can be prevented from entering the valve pipe to influence the use of the stop valve.

Description

Stop valve with non-return function

Technical Field

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

Background

The stop valve is a valve capable of cutting off the water source in the pipe at any time. When the existing stop valve is used, water flow backflow can be prevented through cutting off a water source in the pipe.

The stop valve is also called a stop valve, and belongs to a forced sealing 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 stop valve is one of the most widely used valves, is suitable for medium and low pressure and high pressure, and plays an important role in cutting off and throttling a medium in a pipeline where the stop valve is positioned.

A valve core in the valve body in the conventional stop valve is directly rotated and lifted through a valve rod to block the communication between a water inlet and a water outlet at two sides of a valve core seat, and the valve core is directly clung to a valve seat along with the rotation of the valve rod.

For example, the prior patent publication CN218377700U provides a stop valve with a non-return function, in which a valve rod is fixedly connected to a pressing member, and the pressing member can move up and down along with the valve rod, so as to change the relative distance between the pressing member and the valve clack, and change the elastic force of an elastic member disposed between the pressing member and the valve clack. When the rebound ability of the elastic piece weakens, the height of the pressure-resisting piece can be properly reduced when the closure through hole is not tightly sealed, the distance between the pressure-resisting piece and the valve clack is reduced, the elastic piece can still work normally to check fluid, the service life of the device is prolonged, and the possible fluid backflow risk is reduced. And can be through further reduction the height of supporting the casting die, increase the pressure of elastic component, with the valve clack lock support on the shutoff through-hole, the fluid in feed liquor chamber can not jack the valve clack, realizes stopping completely to two directions of immersed pump system's pipeline, can be relieved to overhaul the pipeline, and the maintenance process is safer.

However, the device is only suitable for changing the relative distance between the pressing piece and the valve clack, so that the elastic force of the elastic piece arranged between the pressing piece and the valve clack is changed, and the liquid in the valve body cannot be fully stopped and prevented from flowing backwards.

The existing stop valve with the check function stops liquid feeding in the liquid feeding cavity at one end of the valve body, liquid is discharged from the liquid discharging cavity to flow back, liquid is not fully stopped, liquid is guided, meanwhile, sealing inside the valve tube is single, sealing leakage is easy to cause liquid to enter the valve tube, and liquid erosion is carried out on the inner wall of the valve tube and part of valve rods, so that service life is influenced.

Disclosure of Invention

The utility model aims to provide a stop valve with a non-return function, so as to solve the problem that the liquid in a valve body cannot be sufficiently stopped and backflow is prevented.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the stop valve with the check function comprises a valve body, wherein a valve pipe is fixed at the top end of the valve body, a valve rod penetrates through the valve pipe, and a valve core is fixed at the bottom end of the valve rod.

Preferably, one end of the valve body is provided with a liquid inlet cavity, the inner end of the liquid inlet cavity is fixedly provided with a limiting ring, the inner end of the limiting ring is provided with a check block, and the inside of the check block is provided with a liquid inlet through groove.

Preferably, a third guide hole is formed in the outer side of the limiting ring, and a guide rod is fixed to the outer side of the check block.

Preferably, the guide rod passes through the third guide hole, a spring is sleeved on the surface of the guide rod, and a limiting block is fixed at the outer end of the guide rod.

Preferably, a liquid outlet cavity is formed in the other end of the valve body, a stop block is fixed at the inner end of the liquid outlet cavity, and a liquid outlet through hole is formed in the surface of the stop block.

Preferably, the surface of the valve core is sleeved with a sealing sleeve, and the bottom end of the valve rod is sleeved with a first sealing gasket.

Preferably, a limiting plate is fixed in the valve tube, a first guide hole is formed in the middle of the limiting plate, and the valve rod penetrates through the first guide hole.

Preferably, a second guide hole is formed in the top end of the valve tube, the valve rod penetrates through the second guide hole, and a rotary hand wheel is fixed to the top end of the valve rod.

Preferably, the surface of the valve rod is sleeved with a second sealing gasket and a nut, the second sealing gasket is positioned at the top end of the second guide hole, and the nut is positioned at the top end of the second sealing gasket.

Compared with the prior art, the utility model has the beneficial effects that:

1. according to the utility model, the check block and the limiting ring are arranged in the liquid inlet cavity of the valve body, when the stop valve is closed, the valve core is inserted into the bottom end of the valve body and is in sealing contact with the liquid inlet cavity and the liquid outlet cavity at two sides, and the check block is retracted into the liquid inlet cavity and blocks the liquid inlet cavity, so that double backflow prevention and check protection can be performed on the liquid inlet cavity, and liquid backflow from the liquid outlet cavity is avoided; simultaneously, when the stop valve is opened, the valve core leaves the inside bottom of valve body, upwards gets into the valve intraduct, simultaneously, the liquid that the feed liquor chamber got into is strikeed the promotion to the non return piece for the non return piece moves to the below of valve core in the middle of the valve body, makes feed liquor logical groove and valve body inside and go out the liquid chamber intercommunication, and liquid circulates.

2. When the stop valve is closed, the valve core is inserted into the inner bottom end of the valve body and is in sealing contact with the liquid inlet cavities and the liquid outlet cavities at two sides, when the stop valve is opened, the valve core leaves the inner bottom end of the valve body and upwards enters the valve pipe until the first sealing gasket upwards abuts against the first guide hole, and meanwhile, the nut is rotated downwards to tightly press the second sealing gasket on the top end of the second guide hole, so that the first guide hole and the second guide hole are subjected to sealing treatment, not only can the backflow of internal liquid be prevented, but also the phenomenon that the inner wall of the valve pipe and part of valve rods are corroded due to the fact that external water vapor enters the valve pipe can be avoided, and the use of the stop valve is influenced.

Drawings

FIG. 1 is a schematic diagram of the overall structure of the present utility model;

FIG. 2 is a cross-sectional view of FIG. 1 of the present utility model;

FIG. 3 is an enlarged view of the utility model at A of FIG. 2;

FIG. 4 is a schematic view of a portion of the check block of FIG. 2 according to the present utility model;

FIG. 5 is a schematic view of a portion of the stop collar of FIG. 2 according to the present utility model;

fig. 6 is a schematic view of a block portion of fig. 2 according to the present utility model.

In the figure: 1. a valve body; 2. a limiting ring; 3. a non-return block; 4. a valve core; 5. sealing sleeve; 6. a stop block; 7. a liquid outlet cavity; 8. a liquid outlet through hole; 9. a valve stem; 10. a limiting plate; 11. a second guide hole; 12. a nut; 13. rotating a hand wheel; 14. a second gasket; 15. a first guide hole; 16. a valve tube; 17. a first gasket; 18. a liquid inlet through groove; 19. a liquid inlet cavity; 20. a third guide hole; 21. a limiting block; 22. a guide rod; 23. and (3) a spring.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. 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.

Example 1

Referring to fig. 1, 2, 3, 4, 5 and 6, the check valve in the drawings comprises a valve body 1, a valve tube 16 is fixed at the top end of the valve body 1, the valve tube 16 is of a circular tube structure and is vertically arranged, a valve rod 9 penetrates through the valve tube 16, and the valve rod 9 is of a threaded rod structure and is vertically arranged.

The bottom end of the valve rod 9 is fixed with a valve core 4, the valve core 4 is of a cylindrical structure, and when the stop valve is closed, the valve core 4 is positioned at the inner bottom end of the valve body 1 to seal the liquid inlet cavity 19 and the liquid outlet cavity 7; when the shut-off valve is open, the valve element 4 is located inside the valve tube 16.

One end of the valve body 1 is provided with a liquid inlet cavity 19, the inner end of the liquid inlet cavity 19 is fixedly provided with a limiting ring 2, the limiting ring 2 is of a circular ring structure, and the inner end of the limiting ring 2 is provided with a check block 3; the inside of the check block 3 is provided with a liquid inlet through groove 18, the section of the liquid inlet through groove 18 is of an L-shaped structure, and the top end of the liquid inlet through groove protrudes out of the top end of the check block 3.

The outside of the limiting ring 2 is provided with a third guide hole 20, the third guide hole 20 is of an opening structure, the outside of the check block 3 is fixedly provided with a guide rod 22, the guide rod 22 is horizontally arranged, and the guide rod 22 slides through the third guide hole 20.

A limiting block 21 is fixed at the outer end of the guide rod 22, a spring 23 is sleeved on the surface of the guide rod 22, when the stop valve is opened, the spring 23 is in a compressed state, the check block 3 moves to the lower part of the valve core 4, the liquid inlet through groove 18 is communicated, and liquid flows through; when the stop valve is closed, the spring 23 is in an extension state, the check block 3 is positioned in the liquid inlet cavity 19, the liquid inlet through groove 18 is closed, and the liquid is subjected to check backflow prevention.

The other end of the valve body 1 is provided with a liquid outlet cavity 7, the inner end of the liquid outlet cavity 7 is fixedly provided with a stop block 6, and the surface of the stop block 6 is provided with a liquid outlet through hole 8 for circulating liquid.

The surface of the valve core 4 is sleeved with a sealing sleeve 5, and after the stop valve is closed, the valve core 4 is sealed with the two sides of the liquid inlet cavity 19 and the liquid outlet cavity 7 through the sealing sleeve 5, so that the liquid is subjected to non-return and backflow prevention.

The bottom of valve rod 9 has cup jointed first sealed pad 17, and the inside of valve pipe 16 is fixed with limiting plate 10, and open in the centre of limiting plate 10 has first guiding hole 15, and first guiding hole 15 is the screw hole structure, and valve rod 9 passes first guiding hole 15 to screw thread fit connects each other.

The top end of the valve tube 16 is provided with a second guide hole 11, the second connecting hole 11 is of a threaded hole structure, and the valve rod 9 passes through the second guide hole 11 and is in threaded fit connection with each other; a rotary hand wheel 13 is fixed at the top end of the valve rod 9.

The surface of the valve rod 9 is sleeved with a second sealing gasket 14 and a nut 12, the second sealing gasket 14 is positioned at the top end of the second guide hole 11, and the nut 12 is positioned at the top end of the second sealing gasket 14.

After the stop valve is opened, the valve rod 9 rotates through the first guide hole 15 and the second guide hole 11 and drives the valve core 4 upwards, the first sealing gasket 17 upwards pushes against the first guide hole 15, the second sealing gasket 14 downwards presses through the nut 12, the second sealing gasket 14 presses against the second guide hole 11, the inside of the valve pipe 16 is sealed, and the stop valve is sealed.

This take stop valve of non return function, when using: by arranging the check block 3 and the limiting ring 2 inside the liquid inlet cavity 19 of the valve body 1, when the stop valve is closed, the valve core 4 is inserted into the bottom end inside the valve body 1 and is in sealing contact with the liquid inlet cavities 19 and the liquid outlet cavities 7 on two sides.

Moreover, the check block 3 is retracted into the liquid inlet cavity 19 and blocks the liquid inlet cavity 19, so that double backflow prevention check protection can be performed on the liquid inlet cavity 19, and backflow of liquid from the liquid outlet cavity 7 is avoided.

Meanwhile, when the stop valve is opened, the valve core 4 leaves the bottom end inside the valve body 1 and upwards enters the valve pipe 16, meanwhile, liquid entering the liquid inlet cavity 19 impacts and pushes the check block 3, so that the check block 3 moves to the middle of the valve body 1 to the lower side of the valve core 4, the liquid inlet through groove 18 is communicated with the inside of the valve body 1 and the liquid outlet cavity 7, and the liquid circulates.

When the stop valve is closed, the valve core 4 is inserted into the inner bottom end of the valve body 1 and is in sealing contact with the liquid inlet cavity 19 and the liquid outlet cavity 7 at two sides.

When the stop valve is opened, the valve core 4 leaves the bottom end of the valve body 1 and upwards enters the valve tube 16 until the first sealing gasket 17 upwards pushes against the first guide hole 15, and simultaneously, the rotary nut 12 downwards tightly presses the second sealing gasket 14 on the top end of the second guide hole 11.

So, carry out sealed processing to first guiding hole 15 and second guiding hole 11, not only can prevent flowing backwards to the inside liquid of valve body 1, avoid liquid to get into inside valve pipe 16 and erode valve pipe 16 inner wall and partial valve rod 9, can also avoid outside rivers steam to get into inside valve pipe 16 and influence the use of stop valve.

It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. Stop valve of area non return function, its characterized in that includes: valve body (1), the top of valve body (1) is fixed with valve pipe (16), valve rod (9) have been passed to the inside of valve pipe (16), the bottom mounting of valve rod (9) has case (4), the one end of valve body (1) is provided with feed liquor chamber (19), the inner end of feed liquor chamber (19) is fixed with spacing ring (2), the inner end of spacing ring (2) is provided with check block (3), open the inside of check block (3) has feed liquor logical groove (18), open the outside of spacing ring (2) has third guiding hole (20), the outside of check block (3) is fixed with guide bar (22), guide bar (22) pass third guiding hole (20), spring (23) have been cup jointed on the surface of guide bar (22), the outer end of guide bar (22) is fixed with stopper (21), the other end of valve body (1) is provided with out liquid chamber (7), the inner end of play liquid chamber (7) is fixed with dog (6), open the outside of check block (2) has third guiding hole (20), the outside of check block (3) is fixed with guide bar (22) has a sealing washer (16), the bottom of valve (5) has cup jointed on the surface (5), the novel valve is characterized in that a first guide hole (15) is formed in the middle of the limiting plate (10), the valve rod (9) penetrates through the first guide hole (15), a second guide hole (11) is formed in the top end of the valve tube (16), the valve rod (9) penetrates through the second guide hole (11), a rotary hand wheel (13) is fixed to the top end of the valve rod (9), a second sealing pad (14) and a nut (12) are sleeved on the surface of the valve rod (9), the second sealing pad (14) is located at the top end of the second guide hole (11), and the nut (12) is located at the top end of the second sealing pad (14).