CN215110532U

CN215110532U - Valve clack automatic sealing stop valve

Info

Publication number: CN215110532U
Application number: CN202121016729.XU
Authority: CN
Inventors: 叶迅良; 叶超超; 胡道忠; 张海兰; 金卡迪; 吕智健
Original assignee: Zhejiang Bertley Technology Co ltd
Current assignee: Zhejiang Bertley Technology Co ltd
Priority date: 2021-05-12
Filing date: 2021-05-12
Publication date: 2021-12-10
Anticipated expiration: 2031-05-12

Abstract

The utility model discloses a valve clack automatic sealing stop valve, which comprises a valve body, a cover plate, a valve rod, a hand wheel, a valve clack and a valve seat, wherein a flow passage is arranged in the valve body; the valve comprises a valve body, a valve rod is arranged in the valve body, a valve clack is arranged on the valve body, the valve clack is arranged in the valve body, an annular hollow portion is arranged on one end face, far away from the valve rod, of the valve clack, an annular sealing portion which is bent towards the center is formed in the position, located on the periphery of the annular hollow portion, of the valve clack, and when the valve rod drives the valve clack to move downwards, the annular sealing portion on the valve clack is abutted to a valve seat. The utility model has the advantages of sealing performance is good and operating torque is little, is applicable to the occasion of high pressure, heavy-calibre, easily popularizes and applies.

Description

Valve clack automatic sealing stop valve

Technical Field

The utility model relates to the technical field of valves, especially, relate to a valve clack self sealing stop valve.

Background

The traditional stop valve is mainly applied to pipelines flowing in steam paths, water paths, oil paths and the like in the fields of petrochemical industry, oil and gas transportation, mine metallurgy, electric power and the like, and is used for connecting and cutting media in pipelines and ensuring the normal operation of equipment and pipelines. The stop valve is sealed by welding and stacking the valve seat, grinding and grinding the valve seat by a bench worker, and forming hardness difference with a valve clack material, wherein the medium flow direction of the commonly used stop valve is generally low in inlet and high in outlet, but the medium flow direction has the defects of poor sealing performance and large operating torque for a valve with high pressure and large caliber.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a valve clack self sealing stop valve, the utility model has the advantages of sealing performance is good and operating torque is little, is applicable to the occasion of high pressure, heavy-calibre, easily popularizes and applies.

In order to achieve the above object, the utility model provides a following technical scheme: the valve clack automatic sealing stop valve comprises a valve body, a cover plate, a valve rod, a hand wheel, a valve clack and a valve seat, wherein a flow channel is arranged in the valve body, the cover plate is arranged at the upper end of the valve body, the valve rod penetrates through the cover plate and extends into the flow channel in the valve body to be connected with the valve clack, the valve seat and the valve body are of an integrated structure, and the valve seat is arranged on the inner wall of the valve body and is used for forming sealing fit with the valve clack; the valve comprises a valve body, a valve rod is arranged in the valve body, a valve clack is arranged on the valve body, the valve clack is arranged in the valve body, an annular hollow portion is arranged on one end face, far away from the valve rod, of the valve clack, an annular sealing portion which is bent towards the center is formed in the position, located on the periphery of the annular hollow portion, of the valve clack, and when the valve rod drives the valve clack to move downwards, the annular sealing portion on the valve clack is abutted to a valve seat.

Through adopting above-mentioned technical scheme, set up annular fretwork portion on the valve clack keeps away from a terminal surface of valve rod, accessible medium auxiliary seal when the valve is closed, the medium gets into annular fretwork portion promptly and exerts pressure medium power all around along the annular in the annular fretwork portion, help the valve clack moves down, make annular sealing portion on the valve clack inconsistent with the disk seat, realize the valve clack self-sealing, make it possess the advantage that sealing performance is good and operating torque is little, be applicable to the high pressure, heavy-calibre's occasion, easily popularize and apply.

The utility model discloses further set up as, the periphery of annular seal portion and the surperficial all build-up welding of disk seat have cobalt base carbide.

Through adopting above-mentioned technical scheme, improved the sealing surface of annular seal portion and the sealed surface of valve seat's wear resistance and sealing performance, can show the life who promotes the valve.

The utility model discloses further set up to, the one end that the valve clack is close to the valve rod is equipped with the mounting groove, the inner of valve rod is equipped with the spacing ring that extends to the periphery, and the periphery cover of valve rod is equipped with the valve clack nut, and the inner wall threaded connection of the periphery of valve clack nut and mounting groove, the lower extreme of valve clack nut support on the up end of spacing ring.

Through adopting above-mentioned technical scheme, can realize the quick assembly disassembly of valve clack and valve clack, do benefit to the maintenance operation of assembly in earlier stage and later stage.

The utility model discloses further set up to, press from both sides between the interior terminal surface of mounting groove and the lower terminal surface of spacing ring and be equipped with valve clack thrust plate.

Through adopting above-mentioned technical scheme, the thrust plate can prevent effectively that the valve rod from taking place the displacement, promotes the steadiness of valve clack installation.

The utility model discloses further set up to, still include self sealss subassembly, self sealss subassembly includes from seal receptacle, self-sealing ring, self sealss pad and only blows the ring, the last port department of valve body is equipped with the installation cavity, the draw-in groove has been seted up along circumference in the position that the installation cavity inner wall is close to the export, only blow the ring joint on the draw-in groove, from seal receptacle cover in the valve rod periphery and the position that the periphery of self-sealing receptacle is located only blow the ring below be equipped with the supporting part of the inseparable laminating of inner wall of installation cavity, the supporting part with only blow and form the seal groove between the ring, self-sealing ring and self sealss pad set up in the seal groove from top to bottom to self-sealing ring and self sealss pad are stopped to blow the ring and are compressed tightly on the up end of supporting part.

Through adopting above-mentioned technical scheme, can show the sealing performance who promotes the valve, avoid appearing the medium and reveal.

The utility model discloses further set up to, adopt the inclined plane to mutually support from the lower terminal surface of sealed pad and the up end of supporting part.

Through adopting above-mentioned technical scheme, medium pressure is big more, and the sealed effect between self sealss pad and the supporting part is better to promote the sealing performance of valve.

The utility model discloses further set up to, still include from top to bottom along the valve rod set up the clamp plate that packs, pack and press cover and seal packing, be equipped with along axially extended sealed chamber from the interior upper end of seal receptacle, the clamp plate that packs is connected with the apron through full tooth double-screw bolt to the apron acts on and packs and presses the cover, makes to pack and presses the cover to seal and packs and establishes in sealed chamber.

Through adopting above-mentioned technical scheme, can promote from the sealing performance between seal receptacle and the valve rod, avoid the medium to leak to external world from the clearance between the two.

The utility model discloses further set up to, the valve body upper end still is connected with the support, installs bevel gear transmission on the support, the hand wheel is connected with bevel gear transmission's input shaft, the valve rod is connected with bevel gear transmission's output shaft.

Through adopting above-mentioned technical scheme, make the operation that the hand wheel drove the valve rod and goes up and down laborsaving and steady more, have the advantage of opening and close rapidly simultaneously.

The utility model discloses further set up to, the runner is the S-shaped structure.

By adopting the technical scheme, the good flow linearity of the medium is ensured, and the flow blocking coefficient is smaller.

Drawings

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

FIG. 2 is an enlarged view of section I of FIG. 1;

fig. 3 is an enlarged schematic view of section II in fig. 1.

In the figure: 1. a valve body; 2. a cover plate; 3. a valve stem; 4. a hand wheel; 5. a valve flap; 6. a valve seat; 7. an annular hollowed-out portion; 8. an annular seal portion; 9. a cobalt-based cemented carbide; 10. mounting grooves; 11. a limiting ring; 12. a valve clack nut; 13. a valve clack thrust plate; 14. a self-sealing seat; 15. a self-sealing ring; 16. a self-sealing gasket; 17. a blowing stop ring; 18. a mounting cavity; 19. a card slot; 20. a support portion; 21. a sealing groove; 22. a packing press plate; 23. pressing and sleeving the filler; 24. sealing and filling; 25. sealing the cavity; 26. a full-tooth stud; 27. a support; 28. a bevel gear transmission; 29. and a flow passage.

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.

Example (b): the automatic sealing stop valve for the valve clack as shown in the attached figures 1-3 comprises a valve body 1, a cover plate 2, a valve rod 3, a hand wheel 4, the valve clack 5 and a valve seat 6, wherein a flow channel 29 is arranged in the valve body 1, the cover plate 2 is arranged at the upper end of the valve body 1, the valve rod 3 penetrates through the cover plate 2 and extends into the flow channel 29 in the valve body 1 to be connected with the valve clack 5, the valve seat 6 and the valve body 1 are of an integrated structure, and the valve seat 6 is arranged on the inner wall of the valve body 1 and is used for forming sealing fit with the valve clack 5; an annular hollow-out portion 7 is arranged on one end face, far away from the valve rod 3, of the valve clack 5, an annular sealing portion 8 which is bent towards the center is formed at the position, located on the periphery of the annular hollow-out portion 7, of the valve clack 5, and when the valve rod 3 drives the valve clack 5 to move downwards, the annular sealing portion 8 on the valve clack 5 is abutted to the valve seat 6. Set up annular fretwork portion 7 on valve clack 5 keeps away from a terminal surface of valve rod 3, accessible medium is supplementary sealed when the valve is closed, the medium gets into annular fretwork portion 7 promptly and exerts pressure medium power all around along the annular in the annular fretwork portion 7, help valve clack 5 moves down, make annular sealing portion 8 on the valve clack 5 inconsistent with disk seat 6, realize valve clack 5 self-sealing, make it possess the advantage that sealing performance is good and operating torque is little, be applicable to high pressure, heavy-calibre's occasion, and easy popularization and application.

As shown in fig. 3, cobalt-based cemented carbide 9 is deposited on the outer periphery of the annular sealing portion 8 and the surface of the valve seat 6, and this design improves the wear resistance and the sealing performance of the sealing surface of the annular sealing portion 8 and the sealing surface of the valve seat 6, and can significantly improve the service life of the valve.

As shown in the attached drawing 1, one end of the valve clack 5 close to the valve rod 3 is provided with a mounting groove 10, the inner end of the valve rod 3 is provided with a limit ring 11 extending towards the periphery, the limit ring 11 and the valve rod 3 are integrated, a valve clack nut 12 is sleeved on the periphery of the valve rod 3, the periphery of the valve clack nut 12 is in threaded connection with the inner wall of the mounting groove 10, and the lower end of the valve clack nut 12 abuts against the upper end face of the limit ring 11. This design can realize valve clack 5 and valve clack 5's quick assembly disassembly, does benefit to the maintenance operation in assembly and the later stage in earlier stage.

As shown in fig. 1, a valve flap thrust plate 13 is interposed between an inner end surface of the mounting groove 10 and a lower end surface of the limit ring 11. The thrust plate can effectively prevent the valve rod 3 from displacing, and the stability of the installation of the valve clack 5 is improved.

As shown in the attached drawing 1, the valve further comprises a self-sealing assembly, the self-sealing assembly comprises a self-sealing seat 14, a self-sealing ring 15, a self-sealing gasket 16 and a blowing stop ring 17, an installation cavity 18 is arranged at the upper port of the valve body 1, a clamping groove 19 is formed in the position, close to the outlet, of the inner wall of the installation cavity 18 along the circumferential direction, the blowing stop ring 17 is clamped on the clamping groove 19, a supporting part 20 tightly attached to the inner wall of the installation cavity 18 is arranged at the position, below the blowing stop ring 17, of the periphery of the valve rod 3, of the self-sealing seat 14 in a sleeved mode on the periphery of the valve rod 14, a supporting part 20 is formed between the supporting part 20 and the blowing stop ring 17, the self-sealing ring 15 and the self-sealing gasket 16 are arranged in the sealing groove 21 from top to bottom, and the self-sealing ring 15 and the self-sealing gasket 16 are compressed on the upper end face of the supporting part 20 by the blowing stop ring 17. The design can obviously improve the sealing performance of the valve and avoid medium leakage.

As shown in fig. 1, the lower end surface of the self-sealing gasket 16 and the upper end surface of the supporting portion 20 are inclined to each other. The greater the pressure of the medium, the better the sealing effect between the self-sealing gasket 16 and the support 20, and thus the sealing performance of the valve is improved.

As shown in fig. 1 and fig. 2, the sealing device further includes a packing pressing plate 22, a packing pressing sleeve 23 and a sealing packing 24, which are arranged from top to bottom along the valve rod 3, the upper end of the inner periphery of the sealing seat 14 is provided with a sealing cavity 25 extending along the axial direction, the packing pressing plate 22 is connected with the cover plate 2 through a full-tooth stud 26, and the cover plate 2 acts on the packing pressing sleeve 23, so that the packing pressing sleeve 23 presses the sealing packing 24 in the sealing cavity 25. This design can promote from the sealing performance between seal receptacle 14 and valve rod 3, avoids the medium to leak to the external world from the clearance between the two.

As shown in fig. 1, the upper end of the valve body 1 is further connected with a bracket 27, a bevel gear transmission 28 is mounted on the bracket 27, and the bevel gear transmission 28 is a conventional commutator and is easily available on the market, so the detailed structure thereof is not described in detail. The hand wheel 4 is connected with an input shaft of a bevel gear transmission device 28, and the valve rod 3 is connected with an output shaft of the bevel gear transmission device 28. This design makes the operation that hand wheel 4 drove valve rod 3 and goes up and down more laborsaving and steady, has the advantage of opening and close rapidly simultaneously.

As shown in fig. 1, the flow channel 29 has an S-shaped structure, and this design can ensure good flow linearity of the medium and make the choke coefficient smaller.

Claims

1. The automatic sealing stop valve for the valve clack comprises a valve body (1), a cover plate (2), a valve rod (3), a hand wheel (4), the valve clack (5) and a valve seat (6), wherein a flow channel (29) is arranged in the valve body (1), the cover plate (2) is arranged at the upper end of the valve body (1), the valve rod (3) penetrates through the cover plate (2) and extends into the flow channel (29) in the valve body (1) to be connected with the valve clack (5), the valve seat (6) and the valve body (1) are of an integrated structure, and the valve seat (6) is arranged on the inner wall of the valve body (1) and used for forming sealing fit with the valve clack (5); the method is characterized in that: an annular hollow-out portion (7) is arranged on one end face, far away from the valve rod (3), of the valve clack (5), an annular sealing portion (8) which is bent towards the center is formed at the position, located on the periphery of the annular hollow-out portion (7), of the valve clack (5), and when the valve rod (3) drives the valve clack (5) to move downwards, the annular sealing portion (8) on the valve clack (5) is abutted to the valve seat (6).

2. The flap self-sealing shut-off valve of claim 1, wherein: and cobalt-based hard alloy (9) is welded on the periphery of the annular sealing part (8) and the surface of the valve seat (6).

3. The flap self-sealing shut-off valve of claim 1, wherein: one end that valve clack (5) are close to valve rod (3) is equipped with mounting groove (10), the inner of valve rod (3) is equipped with spacing ring (11) that extend to the periphery, and the periphery cover of valve rod (3) is equipped with valve clack nut (12), the inner wall threaded connection of the periphery of valve clack nut (12) and mounting groove (10), and the lower extreme of valve clack nut (12) supports on the up end of spacing ring (11).

4. The flap self-sealing shut-off valve of claim 3, wherein: and a valve clack thrust plate (13) is clamped between the inner end surface of the mounting groove (10) and the lower end surface of the limiting ring (11).

5. The flap self-sealing shut-off valve of claim 1, wherein: also comprises a self-sealing assembly, the self-sealing assembly comprises a self-sealing seat (14), a self-sealing ring (15), a self-sealing pad (16) and a blow-stopping ring (17), an installation cavity (18) is arranged at the upper port of the valve body (1), a clamping groove (19) is arranged on the inner wall of the installation cavity (18) close to the outlet along the circumferential direction, the blowing stop ring (17) is clamped on the clamping groove (19), the self-sealing seat (14) is sleeved on the periphery of the valve rod (3), a supporting part (20) which is tightly attached to the inner wall of the installation cavity (18) is arranged at the position, below the blowing stop ring (17), of the periphery of the self-sealing seat (14), a sealing groove (21) is formed between the supporting part (20) and the blowing stop ring (17), the self-sealing ring (15) and the self-sealing gasket (16) are arranged in the sealing groove (21) from top to bottom, and the self-sealing ring (15) and the self-sealing gasket (16) are pressed against the upper end surface of the support part (20) by the blow-out preventing ring (17).

6. The flap self-sealing shut-off valve of claim 5, wherein: the lower end face of the self-sealing gasket (16) is matched with the upper end face of the supporting part (20) by adopting an inclined plane.

7. The flap self-sealing shut-off valve of claim 5, wherein: still include from top to bottom along valve rod (3) packing clamp plate (22), packing pressure cover (23) and sealed packing (24) that set up, be equipped with along axially extended sealed chamber (25) from the upper end of seal receptacle (14) inner periphery, packing clamp plate (22) are connected with apron (2) through full tooth double-screw bolt (26) to apron (2) act on packing pressure cover (23), make packing pressure cover (23) press sealed packing (24) to establish in sealed chamber (25).

8. The flap self-sealing shut-off valve of claim 1, wherein: the upper end of the valve body (1) is further connected with a support (27), a bevel gear transmission device (28) is mounted on the support (27), the hand wheel (4) is connected with an input shaft of the bevel gear transmission device (28), and the valve rod (3) is connected with an output shaft of the bevel gear transmission device (28).

9. The flap self-sealing shut-off valve of claim 1, wherein: the flow channel (29) is of an S-shaped structure.