CN211474939U

CN211474939U - Pneumatic ball valve

Info

Publication number: CN211474939U
Application number: CN202020054346.0U
Authority: CN
Inventors: 洪钦赐; 洪守用
Original assignee: Quancheng Valve Co ltd
Current assignee: Quancheng Valve Co ltd
Priority date: 2020-01-12
Filing date: 2020-01-12
Publication date: 2020-09-11
Anticipated expiration: 2030-01-12

Abstract

The utility model discloses a pneumatic ball valve, which belongs to the technical field of valves and comprises a main valve body, an auxiliary valve body, a spherical valve core, a valve rod and a pneumatic actuating mechanism, wherein the upper part of the main valve body is provided with a fixed cylinder, the inner side of the fixed cylinder is in threaded connection with a lifting cylinder, the bottom of the lifting cylinder is positioned below the position where the spherical valve core is clamped with the valve rod, the bottom surface of the lifting cylinder is matched with the outer side of the upper half part of the spherical valve core, and the bottom of the lifting cylinder is provided with an elastic sealing layer; the inner side wall of the lifting cylinder is provided with a multi-stage stepped groove with the caliber being sequentially reduced from top to bottom, the lower part of the valve rod is provided with a stepped shaft matched with the multi-stage stepped groove, and an elastic sealing ring is arranged in the multi-stage stepped groove; the bottom of the fixed cylinder is higher than the top of the spherical valve core, and the spherical valve core is clamped with the valve rod. The utility model discloses rational in infrastructure, the equipment is convenient, can realize comprehensively and the efficient is sealed, and the sealing member is difficult for the damage that drops, can not cause liquid leakage, and the security is high for the life-span of valve body can prolong, does not need frequent change, is favorable to guaranteeing output.

Description

Pneumatic ball valve

Technical Field

The utility model relates to the technical field of valves, specificly relate to a pneumatic ball valve.

Background

In China, the pneumatic ball valve is widely applied to industries such as petroleum refining, long-distance pipelines, chemical industry, papermaking, pharmacy, water conservancy, electric power, municipal administration, steel and the like, and plays a significant role in national economy. The pneumatic ball valve is a ball valve matched with a pneumatic actuator, the pneumatic actuator has high execution speed and is mainly used for cutting off, distributing and changing the flow direction of a medium in a pipeline, so the pneumatic ball valve is also called as a pneumatic quick cutting-off ball valve. The plug body of the pneumatic ball valve is a sphere, a circular through hole or a channel passes through the axis of the sphere, and the pneumatic ball valve can be tightly closed only by rotating 90 degrees and using a small moment in the use process. However, the sealing structure of the existing pneumatic ball valve is unreasonable, the sealing element is easy to fall off and damage, liquid leakage can be caused, and potential safety hazards exist, so that the service life of the valve is short, the valve needs to be frequently replaced, and the yield is influenced.

SUMMERY OF THE UTILITY MODEL

1. Technical problem to be solved

The to-be-solved technical problem of the utility model is to provide a pneumatic ball valve, its is rational in infrastructure, and the equipment is convenient, can realize comprehensively and the efficient is sealed, and the sealing member is difficult for the damage that drops, can not cause liquid leakage, and the security is high for the life-span of valve body can prolong, does not need frequent change, is favorable to guaranteeing output.

2. Technical scheme

In order to solve the above problem, the utility model adopts the following technical scheme:

a pneumatic ball valve comprises a main valve body, an auxiliary valve body, a spherical valve core, a valve rod and a pneumatic actuating mechanism, wherein the main valve body and the auxiliary valve body are fixed together through bolts;

the valve rod is clamped with the spherical valve core, the upper end of the main valve body is fixed with a fixed cylinder which is coaxial with the valve rod, the lower end of the fixed cylinder is higher than the top of the spherical valve core, the inner side surface of the fixed cylinder is provided with internal threads, the outer surface of the upper end of the fixed cylinder is connected with a first flange which is integrally formed with the fixed cylinder, the inner side of the fixed cylinder is in threaded connection with a lifting cylinder, the outer side surface of the lifting cylinder is provided with an external thread matched with the internal thread, the bottom of the lifting cylinder is positioned below the position where the spherical valve core is clamped with the valve rod, the bottom surface of the lifting cylinder is matched with the outer surface of the upper half part of the spherical valve core, an elastic sealing layer is fixed on the bottom surface of the lifting cylinder, a multi-stage stepped groove with the caliber being reduced from top to bottom is arranged on the inner side wall of the lifting cylinder, the lower part of the valve rod is provided with a stepped shaft matched with the multistage stepped groove, and each caliber part in the multistage stepped groove is provided with an elastic sealing ring; the upper end of a lift section of thick bamboo extends to the top of a fixed section of thick bamboo, and is connected with the second flange that is located first flange top on the surface of a lift section of thick bamboo, second flange and a lift section of thick bamboo integrated into one piece, the connecting piece is the ring body that the section of intercepting is "L" shape, the connecting piece is located the top of second flange, first flange, second flange and connecting piece overlap joint in proper order and are in the same place through the fix with screw.

Furthermore, an elastic sealing gasket is fixed on the side surface of the part, connected with the main valve body through the bolt, of the auxiliary valve body, facing the main valve body. The elastic sealing gasket can ensure the sealing performance of the joint between the main valve body and the auxiliary valve body and can promote the sealing performance of the ball valve.

Furthermore, a clamping block in a square structure is fixed at the bottom of the valve rod, and a square groove matched with the clamping block is formed in the top of the spherical valve core. The clamping connection between the valve rod and the spherical valve core can be realized by the arrangement of the clamping block and the square groove, and the spherical valve core can be driven to rotate by the valve rod.

Furthermore, a cylindrical limiting block is fixed at the bottom of the spherical valve core, and a limiting groove matched with the limiting block is formed in the position, corresponding to the bottom of the spherical valve core, on the valve seat. The arrangement of the limiting block and the limiting groove can further limit the installation position of the spherical valve core, and the rotation of the spherical valve core is not influenced.

3. Advantageous effects

(1) The utility model is provided with a fixed cylinder on the upper part of the main valve body, the inner side of the fixed cylinder is connected with a lifting cylinder by screw thread, a first flange and a second flange are respectively fixed on the fixed cylinder and the lifting cylinder correspondingly, and the first flange and the second flange are fixed together by screws, the lifting cylinder and the fixed cylinder are sealed by screw thread connection, and the sealing part is not easy to fall off and damage; the bottom of a lift section of thick bamboo is located the below of the position of spherical case and valve rod joint, the bottom surface and the first half surface looks adaptation of spherical case of a lift section of thick bamboo, can make the lift section of thick bamboo bottom sticis on spherical case and realize sealedly through rotatory lift section of thick bamboo, and the elastic sealing layer of lift section of thick bamboo bottom can further promote the sealing performance between a lift section of thick bamboo and the spherical case, can prevent effectively that liquid from getting into main valve body upper portion, and the difficult emergence of the position of a lift section of thick bamboo changes, thereby can ensure the sealed effect between lift section of thick bamboo bottom and the spherical case.

(2) The utility model discloses be equipped with the multistage ladder groove that the bore reduced from top to bottom in proper order on the inside wall of a lift section of thick bamboo, the valve rod lower part be with the step shaft of multistage ladder groove looks adaptation, the cooperation through multistage ladder groove and step shaft between valve rod and the lift section of thick bamboo realizes sealedly, and the elasticity sealing washer of multistage ladder inslot can further promote the sealing performance between valve rod and the lift section of thick bamboo, can further prevent that liquid from getting into main valve body upper portion, and the inboard multistage ladder groove of a lift section of thick bamboo can support elasticity sealing washer and step shaft, make them be difficult for droing, thereby can ensure the sealed effect between valve rod and the lift section of thick bamboo.

(3) The utility model discloses a bottom of fixed section of thick bamboo is higher than the top of spherical case, joint between spherical case and the valve rod. During the equipment, can be comparatively convenient put into the disk seat with spherical case from the main valve body one side of connecting the vice valve body, then link together vice valve body and main valve body, rotate a lift section of thick bamboo again and make it descend, it sticiss on spherical case to the elastic sealing layer, then insert the valve rod from the last port of a lift section of thick bamboo, insert square inslot to the fixture block, simultaneously, the step shaft on the valve rod just inserts multistage ladder inslot, arrange the connecting piece in on the second flange again, and link together connecting piece, second flange and first flange with the screw, last with pneumatic actuator's output shaft and the upper end fixed connection of valve rod, and fix pneumatic actuator on the connecting piece can, its is rational in infrastructure, the equipment is convenient.

To sum up, the utility model discloses rational in infrastructure, the equipment is convenient, can realize comprehensively and the efficient is sealed, and the sealing member is difficult for droing the damage, can not cause liquid to leak, and the security is high for the life-span of valve body can prolong, does not need frequent change, is favorable to guaranteeing output.

Drawings

Fig. 1 is a schematic structural view of the present invention;

reference numerals: 1. a main valve body; 2. a sub-valve body; 3. a spherical valve core; 4. a valve stem; 5. a pneumatic actuator; 6. a valve seat; 7. a connecting member; 8. a fixed cylinder; 9. an internal thread; 10. a first flange; 11. a lifting cylinder; 12. an external thread; 13. an elastomeric sealing layer; 14. a multi-stage stepped groove; 15. a stepped shaft; 16. an elastic sealing ring; 17. a second flange; 18. a screw; 19. an elastic sealing gasket; 20. a clamping block; 21. a square groove; 22. a limiting block; 23. a limiting groove.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples.

Examples

A pneumatic ball valve as shown in fig. 1, which includes a main valve body 1, an auxiliary valve body 2, a spherical valve core 3, a valve rod 4 and a pneumatic actuator 5, wherein the main valve body 1 and the auxiliary valve body 2 are fixed together by bolts, a valve seat 6 is arranged at one end of the main valve body 1 close to the auxiliary valve body 2, the spherical valve core 3 is rotatably arranged in the valve seat 6, the middle of the end surface of the auxiliary valve body 2 facing the main valve body 1 is matched with the outer surface of the spherical valve core 3, the valve rod 4 is connected to the top of the spherical valve core 3, the pneumatic actuator 5 is connected to the top of the main valve body 1 by a connecting piece 7, and the valve rod 4 is coaxially and fixedly connected with the output shaft of the pneumatic actuator;

the joint between valve rod 4 and the spherical case 3, main valve body 1 upper end is fixed with the solid fixed cylinder 8 with the coaxial setting of valve rod 4, and the lower extreme of solid fixed cylinder 8 is higher than the top of spherical case 3, be equipped with internal thread 9 on the medial surface of solid fixed cylinder 8, and the upper end surface of solid fixed cylinder 8 is connected with rather than integrated into one piece's first flange 10, the inboard threaded connection of solid fixed cylinder 8 has a section of thick bamboo 11 that goes up and down, be equipped with the external screw thread 12 with internal thread 9 looks adaptation on the lateral surface of a section of thick bamboo 11 that goes up and down, the bottom of a section of thick bamboo 11 is located the below of the position of spherical case 3 and valve rod 4 joint, the bottom surface of a section of thick bamboo 11 and the first half surface looks adaptation of spherical case 3, and be fixed with elastic sealing layer 13 on the bottom surface of a section of thick bamboo 11, be equipped with the multistage ladder groove 14 that the bore reduces from top to, and each caliber part in the multistage stepped groove 14 is provided with an elastic sealing ring 16; the upper end of a lift section of thick bamboo 11 extends to the top of a fixed section of thick bamboo 8, and is connected with the second flange 17 that is located first flange 10 top on a lift section of thick bamboo 11's the surface, second flange 17 and a lift section of thick bamboo 11 integrated into one piece, connecting piece 7 is the ring body that the section of thick bamboo was "L" shape of cutting, connecting piece 7 is located the top of second flange 17, first flange 10, second flange 17 and connecting piece 7 overlap joint in proper order and are in the same place through screw 18 is fixed.

In the present embodiment, an elastic packing 19 is fixed to a side surface of the sub-valve body 2, which faces the main valve body 1, at a portion connected to the main valve body 1 by a bolt. The elastic sealing gasket 19 can ensure the sealing performance of the joint between the main valve body 1 and the auxiliary valve body 2 and can promote the sealing performance of the ball valve.

In this embodiment, a latch 20 having a square structure is fixed at the bottom of the valve rod 4, and a square groove 21 adapted to the latch 20 is formed at the top of the spherical valve core 3. The clamping connection between the valve rod 4 and the spherical valve core 3 can be realized by the arrangement of the clamping block 20 and the square groove 21, and the spherical valve core 3 can be driven to rotate by the valve rod 4.

In this embodiment, a cylindrical limiting block 22 is fixed at the bottom of the spherical valve core 3, and a limiting groove 23 adapted to the limiting block 22 is formed at a position on the valve seat 6 corresponding to the bottom of the spherical valve core 3. The arrangement of the limiting block 22 and the limiting groove 23 can further limit the installation position of the ball valve core 3, and the rotation of the ball valve core 3 is not influenced.

The specific application process of the pneumatic ball valve is as follows:

when the ball valve is assembled, firstly, the lifting cylinder 11 is rotated to lift the lifting cylinder until the bottom of the lifting cylinder is positioned above the bottom of the fixed cylinder 8, then the spherical valve core 3 is placed into the valve seat 6 from one side of the main valve body 1 connected with the auxiliary valve body 2, the limiting block 22 is clamped into the limiting groove 23, then the auxiliary valve body 2 is connected with the main valve body 1, so that the auxiliary valve body 2 and the main valve body 1 clamp the spherical valve core 3, then the lifting cylinder 11 is rotated to lower the lifting cylinder until the elastic sealing layer 13 is tightly pressed on the spherical valve core 3, at the moment, the second flange 17 just contacts the first flange 10, then the valve rod 4 is inserted into the lifting cylinder 11 from the upper port until the clamping block 20 is inserted into the square groove 21, meanwhile, the stepped shaft 15 on the valve rod 4 just inserts into the multistage stepped groove 14, then the connecting piece 7 is placed on the second flange 17, and the connecting piece 7, the second flange 17 and the first flange 10 are, and finally, fixedly connecting an output shaft of the pneumatic actuator 5 with the upper end of the valve rod 4 and fixing the pneumatic actuator 5 on the connecting piece 7.

When the valve is used, the main valve body 1 and the auxiliary valve body 2 are respectively connected with a water inlet end and a water outlet end, when a channel in the spherical valve core 3 is communicated with channels in the main valve body 1 and the auxiliary valve body 2, liquid can be smoothly conveyed, the valve rod 4 is driven to rotate through the pneumatic actuator 5, the valve rod 4 drives the spherical valve core 3 to rotate, and once the channel in the spherical valve core 3 is staggered with the channels in the main valve body 1 and the auxiliary valve body 2, the liquid conveying is blocked. In the application process, the main valve body 1 and the auxiliary valve body 2 are sealed through the elastic sealing gasket 19; the lifting cylinder 11 and the fixed cylinder 8 are sealed in a threaded connection mode; the bottom of the lifting cylinder 11 is tightly pressed on the spherical valve core 3 to realize sealing, and the elastic sealing layer 13 at the bottom of the lifting cylinder 11 can further improve the sealing performance between the lifting cylinder 11 and the spherical valve core 3, so that liquid can be effectively prevented from entering the upper part of the main valve body 1; the valve rod 4 and the lifting cylinder 11 are sealed through the matching action of the multistage stepped grooves 14 and the stepped shaft 15, the sealing performance between the valve rod 4 and the lifting cylinder 11 can be further improved through the elastic sealing rings 16 in the multistage stepped grooves 14, and liquid can be further prevented from entering the upper portion of the main valve body 1. In addition, the lifting cylinder 11 is connected with the fixed cylinder 8 in a threaded connection mode, and flanges of the lifting cylinder 11 and the fixed cylinder are connected together through a screw 18, so that the position of the lifting cylinder 11 is not easy to change, and the sealing effect between the bottom of the lifting cylinder 11 and the spherical valve core 3 can be guaranteed; the multi-stage stepped groove 14 on the inner side of the lifting cylinder 11 can support the elastic sealing ring 16 and the stepped shaft 15, so that the elastic sealing ring and the stepped shaft are not easy to fall off, and the sealing effect between the valve rod 4 and the lifting cylinder 11 can be guaranteed; the lifting cylinder 11 and the fixed cylinder 8 are connected in a threaded connection mode, and the sealing action part of the lifting cylinder is not easy to fall off and damage, so that the pneumatic ball valve cannot cause liquid leakage and is high in safety.

According to the above, the utility model discloses rational in infrastructure, the equipment is convenient, can realize comprehensively and the efficient is sealed, and the sealing member is difficult for coming off the damage, can not cause the liquid leakage, and the security is high for the life-span of valve body can be prolonged, does not need frequent change, is favorable to guaranteeing output.

It will be appreciated by those skilled in the art that the above embodiments are only for illustrating the present invention and are not to be used as limitations of the present invention, and that changes and modifications to the above described embodiments will fall within the scope of the claims of the present invention as long as they are within the spirit and scope of the present invention.

Claims

1. A pneumatic ball valve comprises a main valve body (1), an auxiliary valve body (2), a spherical valve core (3), a valve rod (4) and a pneumatic actuating mechanism (5), wherein the main valve body (1) and the auxiliary valve body (2) are fixed together through bolts, a valve seat (6) is arranged at one end, close to the auxiliary valve body (2), in the main valve body (1), the spherical valve core (3) can be rotatably arranged in the valve seat (6), the middle of the end face, facing the main valve body (1), of the auxiliary valve body (2) is matched with the outer surface of the spherical valve core (3), the valve rod (4) is connected to the top of the spherical valve core (3), the pneumatic actuating mechanism (5) is connected to the top of the main valve body (1) through a connecting piece (7), and the valve rod (4) is coaxially and fixedly connected with an output shaft of the pneumatic actuating mechanism (5); it is characterized in that the preparation method is characterized in that,

the valve rod (4) is clamped with the spherical valve core (3), a fixed cylinder (8) which is coaxial with the valve rod (4) is fixed at the upper end of the main valve body (1), the lower end of the fixed cylinder (8) is higher than the top of the spherical valve core (3), an internal thread (9) is arranged on the inner side surface of the fixed cylinder (8), a first flange (10) which is integrally formed with the fixed cylinder (8) is connected to the outer surface of the upper end of the fixed cylinder (8), a lifting cylinder (11) is in threaded connection with the inner side of the fixed cylinder (8), an external thread (12) which is matched with the internal thread (9) is arranged on the outer side surface of the lifting cylinder (11), the bottom of the lifting cylinder (11) is positioned below the position where the spherical valve core (3) is clamped with the valve rod (4), the bottom surface of the lifting cylinder (11) is matched with the outer surface of the upper half part of the spherical valve core (3), and an, the inner side wall of the lifting cylinder (11) is provided with a multi-stage stepped groove (14) with the caliber being sequentially reduced from top to bottom, the lower part of the valve rod (4) is provided with a stepped shaft (15) matched with the multi-stage stepped groove (14), and each caliber part in the multi-stage stepped groove (14) is provided with an elastic sealing ring (16); the upper end of a lift section of thick bamboo (11) extends to the top of a fixed section of thick bamboo (8), and is connected with second flange (17) that are located first flange (10) top on the surface of a lift section of thick bamboo (11), second flange (17) and a lift section of thick bamboo (11) integrated into one piece, connecting piece (7) are the ring body that the section of truncation is "L" shape, connecting piece (7) are located the top of second flange (17), first flange (10), second flange (17) and connecting piece (7) overlap joint in proper order and are fixed together through screw (18).

2. A pneumatic ball valve according to claim 1, characterized in that the part of the secondary valve body (2) which is bolted to the main valve body (1) is secured with an elastic gasket (19) on the side facing the main valve body (1).

3. The pneumatic ball valve according to claim 1, wherein a fixture block (20) with a square structure is fixed at the bottom of the valve rod (4), and a square groove (21) matched with the fixture block (20) is formed at the top of the spherical valve core (3).

4. The pneumatic ball valve according to claim 1, wherein a cylindrical limiting block (22) is fixed at the bottom of the spherical valve core (3), and a limiting groove (23) matched with the limiting block (22) is formed in the position, corresponding to the bottom of the spherical valve core (3), on the valve seat (6).