CN212251271U

CN212251271U - Wear-resisting V-shaped cut-off ball valve

Info

Publication number: CN212251271U
Application number: CN202020910720.2U
Authority: CN
Inventors: 周渝钦; 王汉克; 余洪斌; 谢锦礼; 李家慧; 陈阿云
Original assignee: Zhejiang Pariworld Automation Meter Co ltd
Current assignee: Zhejiang Pariworld Automation Meter Co ltd
Priority date: 2020-05-26
Filing date: 2020-05-26
Publication date: 2020-12-29
Anticipated expiration: 2030-05-26

Abstract

The utility model discloses a wear-resistant V-shaped cut-off ball valve, which comprises a valve body, wherein a valve seat and a valve core are arranged in the valve body, an upper valve rod is arranged on the upper part of the valve body in a penetrating way, the upper end of the upper valve rod is connected with a pneumatic actuating mechanism, and the lower end of the upper valve rod extends into the valve body and is connected with the valve core; the disk seat is installed on the valve body inner wall, the ring channel has been seted up along circumference to the one end that the disk seat is interior to be close to the case in the disk seat, first chamfer face has been seted up to the juncture of ring channel and disk seat inner terminal surface, the juncture of ring channel and disk seat inner periphery is equipped with the transition inclined plane with case surface looks adaptation, the inner periphery of disk seat is equipped with first wearing layer, second chamfer face has been seted up with the juncture of first wearing layer inner periphery and first wearing layer inner terminal surface, the surface of case is equipped with the second wearing layer, first chamfer face all offsets and forms sealed cooperation with second wearing layer surface with the second chamfer face. The utility model discloses have extremely strong wear resistance, can guarantee the leakproofness between disk seat and the case, avoid the ball valve to produce the medium leakage under the off-state.

Description

Wear-resisting V-shaped cut-off ball valve

Technical Field

The utility model relates to a ball valve technical field especially relates to a ball valve is cut off to wear-resisting V type.

Background

The ball valve has the action of rotating 90 degrees, and the cock body is a sphere and is provided with a circular through hole or a channel passing through the axis of the sphere. The ball valve is mainly used for cutting off and distributing in a pipeline and changing the flow direction of a medium, and can be closed tightly only by rotating 90 degrees and a small rotating moment. Ball valves are best suited for use as switches, shut-off valves, but recent developments have designed ball valves to provide throttling and flow control, such as V-shaped ball valves. The V-shaped ball valve belongs to a fixed ball valve and is also a single-seat sealing ball valve, the adjusting performance is the best of the ball valves, the flow characteristics are equal in percentage, and the adjustable ratio reaches 100: 1. The V-shaped notch and the metal valve seat have a shearing effect, and are particularly suitable for media containing fibers, tiny solid particles, slurry and the like. However, the conventional V-shaped ball valve has poor wear resistance, and a gap is generated by abrasion of a contact surface between a valve seat and a valve element after a plurality of opening and closing operations for a long time, and thus, when the ball valve is closed, a medium is easily leaked through the gap.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a ball valve is cut off to wear-resisting V type, the utility model discloses have extremely strong wear resistance, can guarantee the leakproofness between disk seat and the case, avoid wear-resisting V type to cut off the ball valve and produce the medium leakage under the closed condition.

In order to achieve the above object, the utility model provides a following technical scheme: the wear-resistant V-shaped cut-off ball valve comprises a valve body, wherein a valve seat and a valve core are arranged in the valve body, an upper valve rod penetrates through the upper part of the valve body, a pneumatic actuating mechanism is connected to the upper end of the upper valve rod, the lower end of the upper valve rod extends into the interior of the valve body and is connected with the valve core, a lower valve rod penetrates through the lower part of the valve body, the upper end of the lower valve rod extends into the interior of the valve body and is connected with the valve core, and the lower end of the; the valve seat is installed on the inner wall of the valve body, a circular groove is formed in one end, close to the valve element, of the inner periphery of the valve seat in the circumferential direction, a first chamfer surface is formed in the junction of the circular groove and the inner end face of the valve seat, a transition inclined plane matched with the surface of the valve element is arranged at the junction of the circular groove and the inner periphery of the valve seat, a first wear-resistant layer is arranged on the inner periphery of the valve seat, a second chamfer surface is formed in the junction of the inner periphery of the first wear-resistant layer and the inner end face of the first wear-resistant layer, a second wear-resistant layer is arranged on the surface of the valve element, and the first.

Preferably, an installation cavity is formed in the inner wall of the valve body along the circumferential direction, a disc spring acting on the valve seat is arranged in the installation cavity, a fixing clamping groove for clamping the edge of the disc spring is formed in the inner wall of the installation cavity, a moving clamping groove for clamping the edge of the disc spring is formed in the outer peripheral wall of the valve seat, the part, fixed in the moving clamping groove, of the disc spring deforms outwards under the action of the valve seat, and the disc spring exerts acting force on the valve seat and points to the valve core.

Preferably, a movable inclined plane inclined towards the direction far away from the disc spring is arranged at the position, located in the mounting cavity, of the inner wall of the valve body, and a movable cavity supporting the disc spring to deform outwards is formed between the movable inclined plane and the disc spring.

Preferably, a sealing cavity is formed in the peripheral wall of the valve seat along the circumferential direction, and a first O-shaped ring in sealing fit with the inner wall of the valve body is embedded in the sealing cavity.

Preferably, the lower end of the upper valve rod and the valve core and the upper end of the lower valve rod and the valve core are fixed through cylindrical pins.

Preferably, an adjusting gasket is arranged between the lower valve rod and the rear gland, and a second O-shaped ring which is in sealing fit with the inner wall of the valve body is arranged on the rear gland.

Preferably, the rear gland and the valve body are fixed through bolts, a counter bore for installing the bolts is formed in the rear gland, and a plug is inserted into the counter bore.

Preferably, the inner end of the plug is provided with a hexagonal groove matched with the nut part of the bolt.

Preferably, the outer end of the plug is in an arched arc shape, and a handle convenient to grasp is arranged at the outer end of the plug.

The utility model discloses a technological effect and advantage:

1. the utility model discloses a first chamfer face has on the disk seat, the second chamfer face has on the first wearing layer of disk seat simultaneously, first chamfer face and second chamfer face all with the case on the surface of second wearing layer inconsistent and form sealed cooperation, form double-seal's structure, when closing the valve, there is a small amount of leakage between the second wearing layer on indulging first chamfer face and the case, the seal structure that second chamfer face and second wearing layer formed also can block the medium and pass through, and all cover the wearing layer in the surface of disk seat interior week and case, the abrasive effect of sealed face has been strengthened greatly. Therefore, the utility model discloses have extremely strong wear resistance, can guarantee the leakproofness between disk seat and the case, avoid wear-resisting V type to cut off the ball valve and produce the medium leakage under the off-state.

2. The utility model discloses the dish spring of installation effect disk seat in the installation cavity of valve body inner wall, the position that the dish spring is fixed in the moving slot outwards warp under the effect of disk seat, and the dish spring applys the effort of directional case to the disk seat, make disk seat and case closely laminate, first chamfer face closely laminates with the second wearing layer on second chamfer face and case surface promptly, indulge first chamfer face, second chamfer face and second wearing layer surface take place wearing and tearing, the dish spring also can promote the disk seat and make disk seat and case closely laminate, first chamfer face has been eliminated, the friction loss on second chamfer face and second wearing layer surface, the production in clearance between disk seat and the case has been avoided, the leakproofness between disk seat and the case has further been guaranteed, avoid wear-resisting V type to cut off the ball valve and produce the medium leakage under the off condition.

3. The utility model discloses add movable chamber and can provide wider initial elastic potential energy for the dish spring at the installation intracavity to utilize the difference of dish spring deformation volume to provide the corresponding extrusion force of disk seat under different work condition, make disk seat and case closely cooperate, in order to guarantee the leakproofness between disk seat and the case.

4. The utility model discloses set up first O shape circle between disk seat and valve body, guaranteed the leakproofness between the two, prevent that the medium from leaking between disk seat and the valve body.

5. The utility model discloses go up between the lower extreme of valve rod and the case and all fix through the cylindric lock between the upper end of lower valve rod and the case, connect simple structure in succession, the installation is firm moreover, makes between the lower extreme of valve rod and the case and between the upper end of lower valve rod and the case all can not produce relative displacement, has guaranteed case pivoted stability.

6. The utility model discloses set up and adjust the gasket between lower valve rod and back gland, the stability of valve rod installation under can further strengthening prevents that lower valve rod from producing axial displacement. And then the second O-shaped ring on the gland can strengthen the leakproofness between the rear gland and the inner wall of the valve body, thereby not only playing the role of preventing medium leakage, but also playing the dustproof effect.

7. The utility model discloses a back has the counter bore that is used for construction bolt on the gland, and careless bolt scotch by the protrusion when can avoiding staff's operation valve in the nut of bolt sinks into the counter bore, inserts on the counter bore and establishes the end cap and have dustproof damp-proofing effect, can avoid on the bolt dust pile up or rust and lead to being difficult to the condition of dismantling to take place.

8. The utility model discloses have the hexagonal groove that agrees with mutually with the nut position of bolt in the inner of end cap, the cooperation is inseparable, can play locking effect to the bolt to guarantee the fastness of back gland installation.

9. The utility model discloses the outer end design of end cap is the arc shape of hunch-up to the outer end of end cap has the handle of being convenient for snatch, has made things convenient for taking out of dismantlement during operation end cap greatly, has saved operating time.

Drawings

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

FIG. 2 is an enlarged view of portion A of FIG. 1;

FIG. 3 is an enlarged view of the portion B in FIG. 1;

fig. 4 is a schematic structural diagram of the plug of the present invention.

In the figure: 1. a valve body; 2. a valve seat; 3. a valve core; 4. an upper valve stem; 5. a pneumatic actuator; 6. a lower valve stem; 7. a rear gland; 8. a cylindrical pin; 9. adjusting the gasket; 10. a second O-ring; 11. an annular groove; 12. a first chamfer surface; 13. a transition bevel; 14. a first wear resistant layer; 15. a second chamfer surface; 16. a second wear layer; 17. a mounting cavity; 18. a disc spring; 19. fixing the clamping groove; 20. moving the card slot; 21. a movable inclined plane; 22. a movable cavity; 23. sealing the cavity; 24. a first O-ring; 25. a bolt; 26. a counter bore; 27. a plug; 28. a hexagonal groove; 29. a handle.

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 wear-resistant V-shaped cut-off ball valve shown in the attached figures 1-4 comprises a valve body 1, a valve seat 2 and a valve core 3 are arranged in the valve body 1, an upper valve rod 4 penetrates through the upper part of the valve body 1, the upper end of the upper valve rod 4 is connected with a pneumatic actuator 5, the lower end of the upper valve rod 4 extends into the valve body 1 and is connected with the valve core 3, a lower valve rod 6 penetrates through the lower part of the valve body 1, the upper end of the lower valve rod 6 extends into the valve body 1 and is connected with the valve core 3, and the lower end of the lower valve rod 6 is fixed through a rear gland 7 arranged at the; the valve rod 6 is driven by the pneumatic actuator 5 to rotate, and the valve core 3 is driven to rotate. The valve seat 2 is arranged on the inner wall of the valve body 1, one end of the inner periphery of the valve seat 2, which is close to the valve core 3, is circumferentially provided with an annular groove 11, the junction of the annular groove 11 and the inner end face of the valve seat 2 is provided with a first chamfer face 12, the junction of the annular groove 11 and the inner periphery of the valve seat 2 is provided with a transition inclined face 13 matched with the surface of the valve core 3, the inner periphery of the valve seat 2 is provided with a first wear-resistant layer 14, the junction of the inner periphery of the first wear-resistant layer 14 and the inner end face of the first wear, the surface of the valve core 3 is provided with a second wear-resistant layer 16, the first chamfer surface 12 and the second chamfer surface 15 are both abutted against the surface of the second wear-resistant layer 16 and form sealing fit to form a double-sealing structure, the transition inclined plane 13 is a distance between the second chamfer surface 15 and the first chamfer surface 12, so as to be matched with the radian of the surface of the valve core 3, and the valve core can be smoothly abutted against the second wear-resistant layer 16 on the valve core 3. When the valve is closed, even if a small amount of leakage exists between the first chamfer surface 12 and the second wear-resistant layer 16 on the valve core 3, the sealing structure formed by the second chamfer surface 15 and the second wear-resistant layer 16 can also prevent a medium from passing through, and the wear-resistant layers cover the inner periphery of the valve seat 2 and the surface of the valve core 3, so that the wear-resistant effect of the sealing surface is greatly enhanced. The first wear-resistant layer 14 and the second wear-resistant layer 16 may be made of CoCrW material.

As shown in fig. 2, an installation cavity 17 is formed in the inner wall of the valve body 1 along the circumferential direction, a disc spring 18 acting on the valve seat 2 is arranged in the installation cavity 17, a fixed clamping groove 19 for clamping the edge of the disc spring 18 is formed in the inner wall of the installation cavity 17, a movable clamping groove 20 for clamping the edge of the disc spring 18 is formed in the outer circumferential wall of the valve seat 2, that is, the fixed clamping groove 19 and the movable clamping groove 20 are respectively located at two sides of the disc spring 18 and are used for clamping the disc spring 18, the part of the disc spring 18 fixed to the movable clamping groove 20 is deformed outwards under the action of the valve seat 2, and the disc spring 18 applies an acting force pointing to the valve core 3 to the valve seat 2, so that the valve seat 2 and the valve core 3 are tightly attached, that the first chamfered surface 12 and the second chamfered surface 15 are tightly attached to the second wear-resistant layer 16 on the surface of the valve core 3, even if the surfaces of the first chamfered surface 12, the second chamfered surface 15 and the second wear, the friction loss on the surfaces of the first chamfer surface 12, the second chamfer surface 15 and the second wear-resistant layer 16 is eliminated, the generation of a gap between the valve seat 2 and the valve core 3 is avoided, the sealing performance between the valve seat 2 and the valve core 3 is further ensured, and the medium leakage generated when the wear-resistant V-shaped cut-off ball valve is in a closed state is avoided.

As shown in fig. 2, a movable inclined surface 21 inclined towards a direction away from the disc spring 18 is arranged at a position, located in the installation cavity 17, of the inner wall of the valve body 1, a movable cavity 22 supporting the disc spring 18 to deform outwards is formed between the movable inclined surface 21 and the disc spring 18, and the movable cavity 22 can provide a wider range of initial elastic potential energy for the disc spring 18, so that corresponding extrusion force of the valve seat 2 is provided by using different deformation amounts of the disc spring 18 under different working conditions, and the valve seat 2 is tightly matched with the valve core 3, so that the sealing performance between the valve seat 2 and the valve core 3 is ensured.

As shown in fig. 2, a sealing cavity 23 is formed in the peripheral wall of the valve seat 2 along the circumferential direction, and a first O-ring 24 which is in sealing fit with the inner wall of the valve body 1 is embedded in the sealing cavity 23, so that the sealing performance between the sealing cavity and the valve body 1 is ensured, and the medium is prevented from leaking between the valve seat 2 and the valve body 1.

The connecting structure is simple, and the installation is firm, so that relative displacement cannot be generated between the lower end of the upper valve rod 4 and the valve core 3 and between the upper end of the lower valve rod 6 and the valve core 3, and the rotating stability of the valve core 3 is ensured.

As shown in the attached drawing 1, an adjusting gasket 9 is arranged between the lower valve rod 6 and the rear gland 7, so that the installation stability of the lower valve rod 6 can be further enhanced, the lower valve rod 6 is prevented from generating axial displacement, a second O-shaped ring 10 which is in sealing fit with the inner wall of the valve body 1 is arranged on the rear gland 7, and the structure not only plays a role in preventing medium leakage, but also plays a dustproof effect.

As shown in fig. 3, the rear gland 7 is fixed with the valve body 1 through a bolt 25, a counter bore 26 for installing the bolt 25 is formed in the rear gland 7, a nut of the bolt 25 is sunk into the counter bore 26 to prevent the bolt 25 which is protruded when a worker operates the valve from being scratched by carelessness, a plug 27 is inserted into the counter bore 26, the structure has a dustproof and moistureproof effect, and the situation that dust is accumulated or rusted on the bolt 25 to cause difficulty in disassembly can be avoided.

As shown in fig. 3, the inner end of the plug 27 is provided with a hexagonal groove 28 engaged with the nut of the bolt 25, and the structure is tightly fitted, so that the bolt 25 can be prevented from being loosened, and the firmness of installation of the rear gland 7 is ensured.

As shown in fig. 3, the outer end of the plug 27 is in an arched arc shape, and the outer end of the plug 27 is provided with a handle 29 which is convenient to grasp, so that the plug 27 can be taken out when being disassembled, and the operation time is saved.

The working principle is as follows: the utility model discloses a first chamfer face 12 has on disk seat 2, second chamfer face 15 has on disk seat 2's the first wearing layer 14 simultaneously, first chamfer face 12 and second chamfer face 15 all with the case 3 on the surface of second wearing layer 16 inconsistent and form sealed cooperation, form double-seal's structure, when closing the valve, there is a small amount of leakage between the second wearing layer 16 on indulging to make first chamfer face 12 and case 3, the seal structure that second chamfer face 15 and second wearing layer 16 formed also can block the medium and pass through, and all cover the wearing layer in disk seat 2 interior week and the surface of case 3, the wear-resisting effect of sealed face has been strengthened greatly. Therefore, the utility model discloses have extremely strong wear resistance, can guarantee the leakproofness between disk seat 2 and the case 3, avoid wear-resisting V type to cut off the ball valve and produce the medium leakage under the off-state.

Claims

1. Wear-resisting V type cuts off ball valve, including valve body (1), be equipped with disk seat (2) and case (3) in valve body (1), the upper portion of valve body (1) is run through and is provided with upper valve rod (4), the upper end of upper valve rod (4) is connected with pneumatic actuator (5), the lower extreme of upper valve rod (4) stretches into valve body (1) inside and is connected with case (3), the lower part of valve body (1) is run through and is provided with lower valve rod (6), the upper end of lower valve rod (6) stretches into valve body (1) inside and is connected with case (3), the lower extreme of lower valve rod (6) is fixed through setting up in back gland (7) of valve body (1) lower extreme; the method is characterized in that: the valve seat (2) is installed on the inner wall of the valve body (1), an annular groove (11) is formed in one end, close to the valve element (3), of the inner periphery of the valve seat (2) along the circumferential direction, a first chamfer surface (12) is formed in the junction of the annular groove (11) and the inner end face of the valve seat (2), a transition inclined surface (13) matched with the surface of the valve element (3) is formed in the junction of the annular groove (11) and the inner end face of the valve seat (2), a first wear-resistant layer (14) is arranged on the inner periphery of the valve seat (2), a second chamfer surface (15) is formed in the junction of the inner periphery of the first wear-resistant layer (14) and the inner end face of the first wear-resistant layer (14), a second wear-resistant layer (16) is arranged on the surface of the valve element (3), and the first chamfer surface (12) and the second chamfer surface (.

2. A wear resistant V-cut ball valve according to claim 1, wherein: the valve is characterized in that a mounting cavity (17) is formed in the inner wall of the valve body (1) along the circumferential direction, a disc spring (18) acting on the valve seat (2) is arranged in the mounting cavity (17), a fixing clamping groove (19) for clamping the edge of the disc spring (18) is formed in the inner wall of the mounting cavity (17), a moving clamping groove (20) for clamping the edge of the disc spring (18) is formed in the outer peripheral wall of the valve seat (2), the part, fixed on the moving clamping groove (20), of the disc spring (18) deforms outwards under the action of the valve seat (2), and the disc spring (18) exerts acting force on the valve seat (2) to point to the valve core (3).

3. A wear resistant V-cut ball valve according to claim 2, wherein: the inner wall of the valve body (1) is provided with a movable inclined surface (21) which inclines towards the direction far away from the disc spring (18) at the position of the mounting cavity (17), and a movable cavity (22) which supports the outward deformation of the disc spring (18) is formed between the movable inclined surface (21) and the disc spring (18).

4. A wear resistant V-cut ball valve according to claim 1, wherein: the outer peripheral wall of the valve seat (2) is provided with a sealing cavity (23) along the circumferential direction, and a first O-shaped ring (24) which is in sealing fit with the inner wall of the valve body (1) is embedded in the sealing cavity (23).

5. A wear resistant V-cut ball valve according to claim 1, wherein: the lower end of the upper valve rod (4) is fixed with the valve core (3) and the upper end of the lower valve rod (6) is fixed with the valve core (3) through cylindrical pins (8).

6. A wear resistant V-cut ball valve according to claim 1, wherein: an adjusting gasket (9) is arranged between the lower valve rod (6) and the rear gland (7), and a second O-shaped ring (10) which is in sealing fit with the inner wall of the valve body (1) is arranged on the rear gland (7).

7. A wear resistant V-cut ball valve according to claim 1, wherein: the rear gland (7) and the valve body (1) are fixed through bolts (25), a counter bore (26) used for installing the bolts (25) is formed in the rear gland (7), and a plug (27) is inserted into the counter bore (26).

8. The wear-resistant V-shaped cut-off ball valve according to claim 7, wherein: the inner end of the plug (27) is provided with a hexagonal groove (28) matched with the nut part of the bolt (25).

9. The wear-resistant V-shaped cut-off ball valve according to claim 7, wherein: the outer end of the plug (27) is in an arched arc shape, and a handle (29) convenient to grab is arranged at the outer end of the plug (27).