CN117090992B

CN117090992B - Pneumatic stop valve

Info

Publication number: CN117090992B
Application number: CN202311360368.4A
Authority: CN
Inventors: 林阿龙; 张志亮; 林福龙; 林雨轩
Original assignee: Shandong Tiancheng Valve Manufacturing Co ltd
Current assignee: Shandong Tiancheng Valve Manufacturing Co ltd
Priority date: 2023-10-20
Filing date: 2023-10-20
Publication date: 2024-01-16
Anticipated expiration: 2043-10-20
Also published as: CN117090992A

Abstract

The invention discloses a pneumatic stop valve, which belongs to the technical field of stop valves and comprises an upper valve body and a lower valve body, wherein a valve rod is movably arranged in the upper valve body, a valve plate is fixed at the bottom of the valve rod, the upper valve body is fixedly connected with the lower valve body, a groove is formed in the bottom of the valve plate, a first spring is connected to the inner wall of the groove, and one end of the first spring is connected with a buffer plate; the valve plate is symmetrically provided with vent holes communicated with the grooves, the top wall of the valve plate is fixedly provided with an annular pipe, the annular pipe is communicated with the vent holes, the annular pipe is connected with a vertically arranged moving pipe, the top wall of the moving pipe is movably and hermetically connected with an L-shaped pipe, and the inner wall of the lower valve body is fixedly provided with a first gas tank; the invention can effectively buffer the fluid impact, protect the valve plate, change the buffer effect according to the opening degree of the valve, reduce adverse factors and prolong the service life of the valve.

Description

Pneumatic stop valve

Technical Field

The invention relates to the technical field of stop valves, in particular to a pneumatic stop valve.

Background

A pneumatic shut-off valve is a valve that uses pneumatic control for controlling the flow of a fluid (typically a gas or a liquid). It consists of a piston, a valve seat and a valve core. When pressure is applied by the air source, the piston is pushed to separate the valve core from the valve seat, so that fluid can flow through the valve. When the air source stops applying pressure, the spring pushes the valve core back to the valve seat, and the valve is closed to prevent further flow of fluid;

the invention with the publication number of CN112855951A discloses a pneumatic stop valve, which comprises a valve body, a valve rod, a sealing disc, a cylinder shell with an opening at the lower end and a piston arranged in the cylinder shell, wherein the opening end of the cylinder shell is in sealing connection with the valve body, a groove is formed in the connecting end surface of the valve body and the cylinder shell, the groove is covered inside the cylinder shell, the sealing disc is arranged in the groove and is in sealing connection with the groove, the valve rod penetrates through the sealing disc to be connected with the piston, and a first sealing ring is arranged between the sealing disc and the valve rod.

Although pneumatic shut-off valves have advantages in many respects, there are certain disadvantages, such as a low velocity of the fluid when the valve is open and a small impact on the valve plate when the fluid is delivered, but as the valve is open, the velocity of the fluid through the valve gradually increases, resulting in an increase in the impact force. Particularly at high flow rates or high differential pressures, the impact of the fluid on the valve plate can be more pronounced, and such an increase in impact force can adversely affect the valve and system, such as noise, vibration, wear, and damage.

Disclosure of Invention

The invention aims to provide a pneumatic stop valve, which solves the following technical problems: when the opening degree of the existing valve is larger, the impact on the valve plate is larger, and phenomena such as noise, vibration, abrasion and damage are easy to occur.

The aim of the invention can be achieved by the following technical scheme:

the pneumatic stop valve comprises an upper valve body and a lower valve body, wherein a valve rod is movably arranged in the upper valve body, a valve plate is fixed at the bottom of the valve rod, the upper valve body is fixedly connected with the lower valve body, a groove is formed in the bottom of the valve plate, a first spring is connected to the inner wall of the groove, and one end of the first spring is connected with a buffer plate;

the valve plate is characterized in that vent holes communicated with the grooves are symmetrically formed in the valve plate, an annular pipe is fixed on the top wall of the valve plate and communicated with the vent holes, a vertically arranged moving pipe is connected to the annular pipe, an L-shaped pipe is movably and hermetically connected to the top wall of the moving pipe, a first gas tank is fixed on the inner wall of the lower valve body, one end of the L-shaped pipe is communicated with the first gas tank, a first ejector rod is fixed on the top wall of the valve plate, the top of the first ejector rod penetrates through the bottom wall of the first gas tank and is fixedly provided with a first piston plate, a second spring is connected to the upper surface of the first piston plate, and one end of the second spring is connected with a second piston plate.

As a further scheme of the invention: the upper valve body is connected with a cylinder through a flange, and an output shaft of the cylinder is fixedly connected with a valve rod.

As a further scheme of the invention: the lower valve body is provided with a fluid inlet pipe and a fluid outlet pipe.

As a further scheme of the invention: the upper surface of valve plate is fixed with waterproof circle, waterproof circle is the rubber material.

As a further scheme of the invention: be fixed with the horizontal pole on the inner wall of lower valve body, the activity is provided with the montant on the horizontal pole, the bottom of montant is fixed with curved conflict board, the lateral wall of conflict board contacts with the inner wall of waterproof circle.

As a further scheme of the invention: the one end of horizontal pole is fixed with first stopper, fixed cover is equipped with the second stopper on the horizontal pole, just the montant is located between first stopper and the second stopper, the cover is equipped with the third spring on the horizontal pole, the third spring is located between first stopper and the montant.

As a further scheme of the invention: the valve is characterized in that a second gas tank and a fixed cylinder are fixed on the inner wall of the upper valve body, a second ejector rod is fixed on the upper surface of the valve plate, the top of the second ejector rod penetrates through the bottom wall of the second gas tank and is fixed with a third piston plate, one end of the top wall of the second gas tank is connected with a communicating pipe, the communicating pipe is communicated with the fixed cylinder, a movable rod is movably and hermetically connected on the bottom wall of the fixed cylinder, a spring telescopic rod is hinged to the bottom of the movable rod, and one end, far away from the movable rod, of the spring telescopic rod is hinged to the abutting plate.

As a further scheme of the invention: the spring telescopic link includes the sleeve, swing joint has branch in the sleeve, telescopic one end is articulated with the movable rod, the one end and the conflict board of branch are articulated, still be provided with the fourth spring in the sleeve, the telescopic inner wall is connected to the one end of fourth spring, and branch is connected to the other end.

The invention has the beneficial effects that:

(1) According to the invention, through the structures such as the groove, the first spring, the buffer plate, the first gas tank and the first piston plate, when the valve is opened, the buffer plate can move in the groove, the impact of the fluid is buffered by the spring, and the valve plate gradually moves upwards along with the increase of the opening degree of the valve, so that the gas pressure in the groove can be increased, the buffer plate is in a dynamic balance state, the impact of the fluid on the valve is reduced, and the normal operation of the valve is ensured;

(2) According to the invention, the waterproof ring is arranged, so that fluid is prevented from entering the upper part of the valve plate when the valve plate moves upwards, and is completely discharged through the fluid outlet pipe, so that the fluid is prevented from remaining in the upper valve body;

(3) According to the invention, by arranging the structures such as the interference plate, the cross rod, the vertical rod, the third spring and the like, the impact of fluid on the waterproof ring can be increased along with the increase of the opening degree of the valve, and the interference plate interferes with the waterproof ring, so that the impact of fluid on the waterproof ring is reduced;

(4) According to the invention, through the arrangement of the structures such as the second gas tank, the fixed cylinder, the second ejector rod, the communicating pipe, the spring telescopic rod and the like, the larger the opening degree of the valve is, the more gas enters the fixed cylinder from the second gas tank, and the larger the descending amplitude of the movable rod is, so that the spring telescopic rod is compressed, more impact force or vibration energy can be absorbed, the buffering performance is improved, and the waterproof ring is protected.

Drawings

The invention is further described below with reference to the accompanying drawings.

FIG. 1 is a schematic diagram of the structure of the present invention;

FIG. 2 is a schematic view of the internal structure of the upper and lower valve bodies of the present invention;

FIG. 3 is a schematic perspective view of a valve stem and valve plate of the present invention;

fig. 4 is an enlarged view at a in fig. 2;

fig. 5 is an enlarged view at B in fig. 2;

FIG. 6 is a schematic view of the structure of the interference plate, cross bar and vertical bar of the present invention;

fig. 7 is a schematic view of the structure of the spring telescoping rod of the present invention.

In the figure: 1. an upper valve body; 2. a lower valve body; 3. a fluid inlet pipe; 4. a fluid outlet pipe; 5. a cylinder; 6. a valve stem; 7. a valve plate; 8. a groove; 9. a buffer plate; 10. a first spring; 11. a vent hole; 12. an annular tube; 13. a moving tube; 14. an L-shaped tube; 15. a first ejector rod; 16. a first gas box; 17. a first piston plate; 18. a second spring; 19. a second piston plate; 20. a waterproof ring; 21. a contact plate; 22. a cross bar; 23. a vertical rod; 24. a first limiting block; 25. a third spring; 26. a second limiting block; 27. a second ejector rod; 28. a second gas tank; 29. a third piston plate; 30. a communicating pipe; 31. a fixed cylinder; 32. a movable rod; 33. a spring telescoping rod; 3301. a sleeve; 3302. a support rod; 3303. and a fourth spring.

Detailed Description

The following description of the embodiments of the present invention 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 invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

Referring to fig. 1-4, the invention discloses a pneumatic stop valve, which comprises an upper valve body 1 and a lower valve body 2, wherein a valve rod 6 is movably arranged in the upper valve body 1, and a valve plate 7 is fixed at the bottom of the valve rod 6; the valve plate 7 is symmetrically provided with vent holes 11 communicated with the grooves 8, the top wall of the valve plate 7 is fixedly provided with an annular pipe 12, the annular pipe 12 is communicated with the vent holes 11, the annular pipe 12 is connected with a vertically arranged moving pipe 13, the top wall of the moving pipe 13 is movably and hermetically connected with an L-shaped pipe 14, the inner wall of the lower valve body 2 is fixedly provided with a first gas box 16, one end of the L-shaped pipe 14 is communicated with the first gas box 16, the top wall of the valve plate 7 is fixedly provided with a first ejector rod 15, the top of the first ejector rod 15 penetrates through the bottom wall of the first gas box 16 and is fixedly provided with a first piston plate 17, the upper surface of the first piston plate 17 is connected with a second spring 18, and one end of the second spring 18 is connected with a second piston plate 19; the upper valve body 1 is connected with a cylinder 5 through a flange, an output shaft of the cylinder 5 is fixedly connected with a valve rod 6, and the lower valve body 2 is provided with a fluid inlet pipe 3 and a fluid outlet pipe 4; when the valve is opened, the valve rod 6 and the valve plate 7 are driven to rise by the air cylinder 5, fluid flows to the fluid outlet pipe 4 through the fluid inlet pipe 3, impact can be caused to the valve plate 7 in the fluid flowing process, if the valve opening degree is small, the upward moving amplitude of the valve plate 7 is small, the buffer plate 9 is arranged below the valve plate 7 and matched with the first spring 10 to buffer impact force, if the valve opening degree is large, the upward moving amplitude of the valve plate 7 is large, the impact force can be increased, the first ejector rod 15 drives the first piston plate 17 to move upward, so that gas in the first gas tank 16 is extruded into the groove 8, the pressure in the groove 8 is increased, the buffer plate 9 can always keep a dynamic balance, namely, along with the increase of the valve opening degree, the impact force is increased along with the increase of the impact force, the buffer capacity of the buffer plate 9 is gradually increased, and adverse effects on the valve are reduced.

Referring to fig. 2-4, a waterproof ring 20 is fixed on the upper surface of the valve plate 7, and the waterproof ring 20 is made of rubber; in order to prevent fluid from entering the upper side of the valve plate 7 when the valve plate 7 is lifted, a waterproof ring 20 is provided to isolate the upper space of the valve plate 7 from the fluid when the valve plate 7 is lifted, thereby preventing the fluid from remaining in the upper valve body 1.

Referring to fig. 2, 5 and 6, a cross rod 22 is fixed on the inner wall of the lower valve body 2, a vertical rod 23 is movably arranged on the cross rod 22, an arc-shaped abutting plate 21 is fixed at the bottom of the vertical rod 23, the side wall of the abutting plate 21 is in contact with the inner wall of the waterproof ring 20, a first limiting block 24 is fixed at one end of the cross rod 22, a second limiting block 26 is fixedly sleeved on the cross rod 22, the vertical rod 23 is positioned between the first limiting block 24 and the second limiting block 26, a third spring 25 is sleeved on the cross rod 22, and the third spring 25 is positioned between the first limiting block 24 and the vertical rod 23; because waterproof circle 20 adopts the rubber material, utilizes conflict board 21 to contact and support waterproof circle 20 to through third spring 25, make conflict board 21 have certain activity space, not rigid support, better cushion the impact force, avoid waterproof circle 20 one side to receive the fluid impact and damage for a long time as far as possible.

Referring to fig. 5-7, a second gas tank 28 and a fixed cylinder 31 are fixed on the inner wall of the upper valve body 1, a second ejector rod 27 is fixed on the upper surface of the valve plate 7, the top of the second ejector rod 27 penetrates through the bottom wall of the second gas tank 28 and is fixed with a third piston plate 29, one end of the top wall of the second gas tank 28 is connected with a communicating pipe 30, the communicating pipe 30 is communicated with the fixed cylinder 31, a movable rod 32 is movably and sealingly connected on the bottom wall of the fixed cylinder 31, a spring telescopic rod 33 is hinged at the bottom of the movable rod 32, one end of the spring telescopic rod 33 far away from the movable rod 32 is hinged with a collision plate 21, the spring telescopic rod 33 comprises a sleeve 3301, a supporting rod 3302 is movably connected in the sleeve 3301, one end of the sleeve 3301 is hinged with the movable rod 32, one end of the supporting rod 3302 is hinged with the collision plate 21, a fourth spring 3303 is further arranged in the sleeve 3301, one end of the fourth spring 3303 is connected with the inner wall of the supporting rod 3301, and the other end is connected with the supporting rod 3302; the greater the valve opening degree is, the greater the flow of fluid is, the impact on the waterproof ring 20 is greater, the valve plate 7 drives the second ejector rod 27 and the third piston plate 29 to move upwards, the gas in the second gas tank 28 is introduced into the fixed cylinder 31, and then the movable rod 32 is pushed to move downwards, so that the spring telescopic rod 33 is extruded, more impact force or vibration energy can be absorbed, the buffer performance is improved, and the waterproof ring 20 is protected.

The working principle of the invention is as follows: when in use, the air cylinder 5 is utilized to drive the valve rod 6 and the valve plate 7 to move upwards, so that the valve is in an open state, the larger the upward moving distance of the valve plate 7 is, the larger the opening degree of the valve is, fluid enters the lower valve body 2 through the fluid inlet pipe 3 and is discharged through the fluid outlet pipe 4, the fluid continuously impacts the valve plate 7 in the flowing process, the buffer plate 9 is arranged below the valve plate 7, when the opening degree of the valve is small, the fluid contacts the buffer plate 9 in the flowing process, the first spring 10 is matched, the first spring 10 is extruded to buffer the impact force, the influence on the valve plate 7 is reduced, when the opening degree of the valve is large, the flow of the fluid is increased, the impact on the valve plate 7 is also increased, and when the upward moving distance of the valve plate 7 is increased, the valve plate 7 drives the first ejector rod 15 and the first piston plate 17 to be lifted, the gas in the first gas box 16 enters the annular pipe 12 through the L-shaped pipe 14 and the moving pipe 13 and then enters the groove 8 through the two vent holes 11, and due to the impact of fluid, the buffer plate 9 is not easy to move downwards, so that the air pressure in the groove 8 is increased, the buffer plate 9 is in a dynamic balance state, the impact of the fluid on the valve is reduced, the normal operation of the valve is ensured, after the opening degree is determined, the first piston plate 17 cannot move, the second piston plate 19 is connected with the first piston plate 17 through the second spring 18, and at the moment, the second piston plate 19 can move in the first gas box 16, so that the impact force is further buffered, the buffer plate 9 is in a dynamic balance state better, and the buffering effect is ensured;

the valve plate 7 moves up when the valve is opened, in the prior art, like mention application file in the background art, after the valve clack rises, fluid can get into the valve clack top, after closing the valve, the valve clack descends, inside has fluidic residue, this application sets up waterproof circle 20 in the top of valve plate 7, this problem can avoid taking place, utilize conflict board 21 to contact and support waterproof circle 20, and through third spring 25, make conflict board 21 have certain activity space, and not rigid support, better cushion impact force, avoid waterproof circle 20's one side to receive fluid impact for a long time and damage as far as possible, the valve opening degree is bigger, the fluidic flow increases, impact to waterproof circle 20 is bigger, valve plate 7 drives second ejector pin 27 and third piston plate 29 to move up, let in the gas in the second gas box 28 in fixed cylinder 31, then promote movable rod 32 and move down, make spring telescopic link 33 be extrudeed, fourth spring 3303 can absorb more impact force or vibration energy, improve the cushioning properties, further protect waterproof circle 20.

The foregoing describes one embodiment of the present invention in detail, but the description is only a preferred embodiment of the present invention and should not be construed as limiting the scope of the invention. All equivalent changes and modifications within the scope of the present invention are intended to be covered by the present invention.

Claims

1. The pneumatic stop valve comprises an upper valve body (1) and a lower valve body (2), wherein a valve rod (6) is movably arranged in the upper valve body (1), and a valve plate (7) is fixed at the bottom of the valve rod (6), and is characterized in that the upper valve body (1) is fixedly connected with the lower valve body (2), a groove (8) is formed in the bottom of the valve plate (7), a first spring (10) is connected to the inner wall of the groove (8), and a buffer plate (9) is connected to one end of the first spring (10);

vent (11) that are linked together with recess (8) are offered to symmetry on valve plate (7), the roof of valve plate (7) is fixed with ring pipe (12), ring pipe (12) are linked together with vent (11), be connected with vertical movable tube (13) that set up on ring pipe (12), the roof movable seal of movable tube (13) is connected with L type pipe (14), be fixed with first gas tank (16) on the inner wall of lower valve body (2), the one end and the first gas tank (16) of L type pipe (14) are linked together, be fixed with first ejector pin (15) on the roof of valve plate (7), the diapire of first gas tank (16) is run through at the top of first ejector pin (15) and are fixed with first piston plate (17), the upper surface of first piston plate (17) is connected with second spring (18), and the one end of second spring (18) is connected with second piston plate (19).

2. A pneumatic shut-off valve according to claim 1, characterised in that the upper valve body (1) is flanged to a cylinder (5), the output shaft of the cylinder (5) being fixedly connected to the valve stem (6).

3. A pneumatic shut-off valve according to claim 1, characterized in that the upper surface of the valve plate (7) is fixed with a waterproof ring (20), the waterproof ring (20) being of rubber material.

4. A pneumatic stop valve according to claim 3, characterized in that a cross rod (22) is fixed on the inner wall of the lower valve body (2), a vertical rod (23) is movably arranged on the cross rod (22), an arc-shaped abutting plate (21) is fixed at the bottom of the vertical rod (23), and the side wall of the abutting plate (21) is in contact with the inner wall of the waterproof ring (20).

5. A pneumatic stop valve according to claim 4, wherein a first limiting block (24) is fixed at one end of the cross rod (22), a second limiting block (26) is fixedly sleeved on the cross rod (22), the vertical rod (23) is located between the first limiting block (24) and the second limiting block (26), a third spring (25) is sleeved on the cross rod (22), and the third spring (25) is located between the first limiting block (24) and the vertical rod (23).

6. A pneumatic shut-off valve according to claim 2, characterized in that the lower valve body (2) is provided with a fluid inlet pipe (3) and a fluid outlet pipe (4).

7. The pneumatic stop valve according to claim 4, wherein a second gas tank (28) and a fixed cylinder (31) are fixed on the inner wall of the upper valve body (1), a second ejector rod (27) is fixed on the upper surface of the valve plate (7), the top of the second ejector rod (27) penetrates through the bottom wall of the second gas tank (28) and is fixed with a third piston plate (29), one end of the top wall of the second gas tank (28) is connected with a communicating pipe (30), the communicating pipe (30) is communicated with the fixed cylinder (31), a movable rod (32) is movably and hermetically connected to the bottom wall of the fixed cylinder (31), a spring telescopic rod (33) is hinged to the bottom of the movable rod (32), and one end, away from the movable rod (32), of the spring telescopic rod (33) is hinged to the abutting plate (21).

8. The pneumatic stop valve according to claim 7, wherein the spring telescopic rod (33) comprises a sleeve (3301), a supporting rod (3302) is movably connected in the sleeve (3301), one end of the sleeve (3301) is hinged to the movable rod (32), one end of the supporting rod (3302) is hinged to the abutting plate (21), a fourth spring (3303) is further arranged in the sleeve (3301), one end of the fourth spring (3303) is connected with the inner wall of the sleeve (3301), and the other end of the fourth spring is connected with the supporting rod (3302).