CN210397833U

CN210397833U - Check valve

Info

Publication number: CN210397833U
Application number: CN201921157507.2U
Authority: CN
Inventors: 梁静; 薛会鸽; 周广利
Original assignee: Wansui Valve Shanghai Co Ltd
Current assignee: Wansui Valve Shanghai Co Ltd
Priority date: 2019-07-23
Filing date: 2019-07-23
Publication date: 2020-04-24
Anticipated expiration: 2029-07-23

Abstract

The utility model discloses a check valve, including connecting valve body pipe, check valve body and case, it is equipped with the flange to connect valve body pipe tip, has the screw thread on the flange, the side the place ahead of check valve body is equipped with the through-hole, installs the pipe in the through-hole, and the pipe is equipped with fixture block inwards towards the inside one end of check valve body, sliding connection sliding block one and sliding block two in the pipe, and the left side of spring coupling pipe is passed through to the left end of sliding block one, and the sliding block two is located the outside of check valve body, the utility model discloses simple structure through the setting of spring one and spring two, makes the check valve adapt to different operating condition, can manually close the check valve through the hand wheel, and the operating condition of check valve can be judged with the setting of sliding block two, provides convenience for maintenance and safety inspection, and both ends connect the valve body.

Description

Check valve

Technical Field

The utility model relates to a valve equipment technical field specifically is a check valve.

Background

The check valve is a kind of automatic valve, which opens and closes the valve clack automatically by medium flowing, and is also called check valve, one-way valve, reverse flow valve and back pressure valve to prevent medium from flowing backwards. The main functions of the device are to prevent medium backflow, reverse rotation of the pump and the driving motor and discharge of container medium.

At present, although the effect of backflow prevention of the check valve on the market is good, the structure is complex, the check valve can only adapt to different water pressures through materials, and when the check valve is damaged, the check valve cannot be judged and replaced in time. Accordingly, one skilled in the art has provided a check valve to solve the problems set forth in the background art described above.

Disclosure of Invention

An object of the utility model is to provide a check valve to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme:

a check valve comprises a joint valve body pipe, a check valve body and a valve core, wherein the end part of the joint valve body pipe is provided with a flange, the flange is provided with threads, a through hole is arranged in the lateral front of the check valve body, a guide pipe is arranged in the through hole, an inward fixture block is arranged at one end of the guide pipe facing the inside of the check valve body, a first sliding block and a second sliding block are connected in the guide pipe in a sliding manner, the left end of the first sliding block is connected with the left side of the guide pipe through a spring, the second sliding block is positioned outside the check valve body, flanges are arranged at two ends of the check valve body, threads are arranged on the flanges, a valve cover is slidably arranged on one side of each flange towards the through hole, a first sealing ring is arranged between each valve cover and each flange, a flat gasket sealing ring is arranged between the flange of the check valve body and the flange of the connector valve body pipe, an annular limiting block is arranged on the inner side of the check valve body, a trapezoidal sealing ring is arranged on the right side of the limiting block, and a first limiting column is arranged on the trapezoidal sealing ring towards one side of the axis of the check valve body;

the valve core comprises a left wide edge and a right narrow edge, the middle part of the left wide edge of the valve core is hollow, a limit column II is arranged at one side of the left wide edge towards the non-return valve body, a rubber ring III is arranged at one side of the limit column II towards the limit block, a rubber ring II is arranged at the limit column II towards the axis direction of the valve core, a spring I is fixedly arranged inside the narrow edge at the right side of the valve core, a sliding block III is fixedly arranged at one end of the spring I, which is far away from the valve core, a rubber block is arranged at one side of the sliding block III, which is far away from the spring I, an upper through hole, a lower through hole and a front side through hole are arranged at the middle parts of the left wide edge and the right narrow edge of the valve core, a rubber ring I is arranged at one side of the upper through hole, and a third limiting column is fixedly arranged on the left side of the fixing column and is positioned inside the second spring.

As a further aspect of the present invention: the fixing column is supported by three supporting columns, so that materials are saved on one hand, and a supporting force is provided for the valve core through the second spring on the other hand.

As a further aspect of the present invention: the angle of the inclined plane of the trapezoidal sealing ring on the limiting block is the same as that of the inclined plane of the rubber ring II, and the angle of the inclined plane of the rubber block is the same as that of the inclined plane of the rubber ring I, so that the check valve body and the valve core can be clamped conveniently.

As a further aspect of the present invention: the through-hole one side is equipped with the rotation post, rotates the post outside and keeps away from the one end of check valve body and installs the hand wheel, rotates the one end fixedly connected with spiral piece that the post is located the internal portion of check valve body.

As a further aspect of the present invention: and the spiral block is in sliding connection with a clamping block on the third sliding block through a front side through hole so as to push the rubber block to move.

As a further aspect of the present invention: the spiral piece uses the centre of a circle of rotating the post as the centre of a circle setting, and the spiral piece divide into spiral piece and lower spiral piece, and when the spiral piece rotated to the maximum angle, the spiral piece pushed the case and supported on the stopper, and the rubber piece supported on rubber circle one, made the valve close.

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

the utility model discloses simple structure through the setting of spring one and spring two, makes the check valve adapt to different operating condition, can manually close the check valve through the hand wheel, and the operating condition of check valve can be judged out in the setting of sliding block one and sliding block two, provides convenience for maintenance and safety inspection, and threaded connection connects the valve body pipe through at both ends, makes things convenient for dismouting and change.

Drawings

Fig. 1 is a schematic structural view of a check valve.

Fig. 2 is a side view of a check valve.

Fig. 3 is a schematic top view of a check valve.

FIG. 4 is a schematic cross-sectional view of a check valve.

Fig. 5 is a perspective view of a screw block of a check valve.

In the figure: 1. a connector valve body tube; 2. a check valve body; 3. a valve core; 4. a through hole; 5. a conduit; 6. a first sliding block; 7. a second sliding block; 8. a valve cover; 9. a first sealing ring; 10. a flat gasket seal ring; 11. a limiting block; 12. a trapezoidal sealing ring; 13. a first limiting column; 14. a first spring; 15. a third sliding block; 16. a rubber block; 17. an upper through hole and a lower through hole; 171. a front side through hole; 18. a first rubber ring; 19. a second rubber ring; 20. a second limiting column; 21. a third rubber ring; 22. a second spring; 23. a third limiting column; 24. fixing a column; 25. rotating the column; 26. a hand wheel; 27. a spiral block.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1 to 5, in the embodiment of the present invention, a check valve comprises a joint valve body 1, a check valve body 2 and a valve core 3, wherein a flange is arranged at the end of the joint valve body 1, a thread is arranged on the flange, a through hole 4 is arranged in front of the side of the check valve body 2, a conduit 5 is arranged in the through hole 4, an inward fixture block is arranged at one end of the conduit 5 facing the inside of the check valve body 2, a first sliding block 6 and a second sliding block 7 are slidably connected in the conduit 5, the left end of the first sliding block 6 is connected with the left side of the conduit 5 through a spring, the second sliding block 7 is arranged outside the check valve body 2, flanges are arranged at the two ends of the check valve body 2, a thread is arranged on the flange, a valve cover 8 is slidably arranged at one side of the flange facing the through hole 4, a first sealing ring 9 is arranged, an annular limiting block 11 is arranged on the inner side of the check valve body 2, a trapezoidal sealing ring 12 is arranged on the right side of the limiting block 11, and a limiting column I13 is arranged on the trapezoidal sealing ring 12 towards one side of the axis of the check valve body 2;

the valve core 3 comprises a left wide edge and a right narrow edge, the middle part of the left wide edge of the valve core 3 is hollow, a second limiting column 20 is arranged at one side of the left wide edge, which faces the check valve body 2, the second limiting column 20 is provided with a third rubber ring 21 at one side of the limiting block 11, the second limiting column 20 is provided with a second rubber ring 19 in the axis direction of the valve core 3, a first spring 14 is fixedly arranged inside the right narrow edge of the valve core 3, a third sliding block 15 is fixedly arranged at one end, which is far away from the valve core 3, of the first spring 14, a rubber block 16 is arranged at one side, which is far away from the first spring 14, of the third sliding block 15, an upper through hole 17 and a lower through hole 17 and a front through hole 171 are arranged at the middle parts of the left wide edge and the right narrow edge of the valve core 3, a first rubber ring, one end, far away from the valve core 3, of the second spring 22 is fixedly installed on a fixed column 24, the fixed column 24 is fixedly installed inside the check valve body 2, a third limiting column 23 is fixedly installed on the left side of the fixed column 24, and the third limiting column 23 is located inside the second spring 22.

The fixing column 24 is provided with three supporting columns for supporting, on one hand, saving materials, and on the other hand, providing supporting force for the valve core 3 through the spring two 22.

The angle of the inclined plane of the trapezoidal sealing ring 12 on the limiting block 11 is the same as that of the inclined plane of the rubber ring II 19, and the angle of the inclined plane of the rubber block 16 is the same as that of the inclined plane of the rubber ring I18, so that the check valve body 2 and the valve core 3 can be clamped conveniently.

Through-hole 4 one side is equipped with rotates post 25, rotates the post 25 outside and keeps away from the one end of check valve body 2 and installs hand wheel 26, rotates the one end fixedly connected with spiral piece 27 that post 25 is located the inside of check valve body 2.

The screw block 27 is slidably connected with the latch on the third sliding block 15 through the front side through hole 171 to push the rubber block 16 to move.

The spiral block 27 is arranged by taking the circle center of the rotating column 25 as the circle center, the spiral block 27 is divided into an upper spiral block and a lower spiral block, when the spiral block 27 rotates to the maximum angle, the spiral block 27 pushes the valve element 3 to abut against the limiting block 11, and the rubber block 16 abuts against the rubber ring I18, so that the valve is closed.

The utility model discloses a theory of operation is: when the valve is installed, the liquid flow direction is that the left side of the valve core 3 flows to the right side, the valve cover 8 is screwed through threads on two flanges, at the moment, the second sliding block 7 is located at the leftmost side of the guide pipe 5, the first spring 14 and the second spring 22 are in a compression state, the trapezoid sealing ring 12, the second rubber ring 19, the rubber block 16 and the first rubber ring 18 are in a joint state, after the liquid is introduced, the liquid presses the valve core 3 from the left end, when the pressure reaches a certain value, the liquid pushes the rubber block 16 to move rightwards, the rubber block 16 is separated from the first rubber ring 18, the first sliding block 15 is driven to compress the first spring 14, the liquid flows through the check valve through the upper and lower through holes 17, at the guide pipe 5, because the liquid flow rate suddenly becomes fast, the second sliding block 7 is driven by suction force to slide downwards, the second sliding block 7 is limited by the block, the air pressure in the guide, when the liquid flow rate is reduced, the second spring 22 pushes the valve core 3 to make the valve core 3 move leftwards, the trapezoid sealing ring 12 and the second rubber ring 19 are compacted, the liquid cannot pass through two sides of the valve core 3, when the liquid flow rate is further reduced, the first spring 14 pushes the third sliding block 15 to drive the first rubber block 16 to compact the first rubber ring 18, the water flow stops, the check valve takes effect, the second sliding block 7 is not subjected to suction, the first sliding block returns to the left side of the guide pipe 5 under the traction of the spring, the outside can judge that the water flow stops, when the check valve is expected to be closed manually, the hand wheel 26 is rotated anticlockwise, the rotating column 25 drives the spiral block 27 to rotate, the spiral block 27 presses the valve core 3 and the third sliding block 15 to slide leftwards, the spiral block 27 pushes the valve core 3 to abut against the limiting block 11, and the rubber block 16 abuts against the first rubber ring 18, so that the valve is closed.

The utility model discloses simple structure through the setting of spring one 14 and spring two 22, makes the check valve adapt to different operating condition, can manually close the check valve through hand wheel 26, and the operating condition of check valve can be judged out in setting up of sliding block one 6 and sliding block two 7, provides convenience for maintenance and safety inspection, and threaded connection connects valve body 1 through at both ends, makes things convenient for dismouting and change.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. A check valve comprises a joint valve body (1), a check valve body (2) and a valve core (3), and is characterized in that a flange is arranged at the end part of the joint valve body (1), threads are arranged on the flange, a through hole (4) is formed in the front side of the check valve body (2), a guide pipe (5) is installed in the through hole (4), an inward fixture block is arranged at one end, facing the inside of the check valve body (2), of the guide pipe (5), a first sliding block (6) and a second sliding block (7) are connected in the guide pipe (5) in a sliding mode, the left end of the first sliding block (6) is connected with the left side of the guide pipe (5) through a spring, the second sliding block (7) is located outside the check valve body (2), flanges are arranged at the two ends of the check valve body (2), threads are arranged on the flanges, a valve cover (8) is installed on one, a flat gasket sealing ring (10) is arranged between the flange of the check valve body (2) and the flange of the connector valve body pipe (1), an annular limiting block (11) is arranged on the inner side of the check valve body (2), a trapezoidal sealing ring (12) is arranged on the right side of the limiting block (11), and a first limiting column (13) is arranged on one side, facing the axis of the check valve body (2), of the trapezoidal sealing ring (12);

the valve core (3) comprises a left wide edge and a right narrow edge, the middle part of the left wide edge of the valve core (3) is hollow, a limiting column II (20) is arranged on one side, facing the non-return valve body (2), of the left wide edge, a rubber ring III (21) is arranged on one side, facing the limiting block (11), of the limiting column II (20), a rubber ring II (19) is arranged on the limiting column II (20) in the direction of the axis of the valve core (3), a spring I (14) is fixedly arranged inside the right narrow edge of the valve core (3), a sliding block III (15) is fixedly arranged at one end, far away from the valve core (3), of the spring I (14), a rubber block (16) is arranged on one side, far away from the spring I (14), an upper through hole (17) and a lower through hole (171) are arranged in the middles of the left wide edge and the right narrow edge of the valve core (3), and a rubber ring I (, one side that the narrow limit on case (3) right side kept away from spring (14) is fixed mounting have spring two (22), and the one end fixed mounting that case (3) were kept away from in spring two (22) is on fixed column (24), and fixed column (24) fixed mounting is inside non return valve body (2), and fixed column (24) left side fixed mounting is spacing post three (23), and spacing post three (23) are located the inside of spring two (22).

2. A non-return valve according to claim 1, characterized in that the fixing posts (24) are provided as three-post supports.

3. The check valve according to claim 1, characterized in that the trapezoid sealing ring (12) on the stopper (11) and the rubber ring two (19) have the same bevel angle, and the rubber block (16) and the rubber ring one (18) have the same bevel angle.

4. The check valve according to claim 1, characterized in that a rotating column (25) is arranged at one side of the through hole (4), a hand wheel (26) is installed at one end of the outer side of the rotating column (25) far away from the check valve body (2), and a spiral block (27) is fixedly connected to one end of the rotating column (25) located inside the check valve body (2).

5. A check valve according to claim 4, characterized in that the screw block (27) is slidably connected with the latch of the slide block three (15) through a front side through hole (171).

6. A non-return valve according to claim 4, characterized in that the screw block (27) is arranged with the centre of the circle of the rotating column (25) as the centre of the circle, the screw block (27) being divided into an upper screw block and a lower screw block.