CN217030015U

CN217030015U - High-pressure ball valve

Info

Publication number: CN217030015U
Application number: CN202122448759.4U
Authority: CN
Inventors: 陈江顺
Original assignee: ZHEJIANG FANGDUN INSTRUMENT VALVE CO Ltd
Current assignee: ZHEJIANG FANGDUN INSTRUMENT VALVE CO Ltd
Priority date: 2021-10-11
Filing date: 2021-10-11
Publication date: 2022-07-22
Anticipated expiration: 2031-10-11

Abstract

The utility model relates to a high-pressure ball valve, which comprises a valve body, a valve rod, a handle, a packing gland, a brake ring, a locking nut and a sealing assembly, wherein the packing gland is in threaded connection with the upper end of the valve body and is locked by the locking nut, the brake ring is fixed at the upper end of the packing gland through a screw, one end of the valve rod is connected with the handle, a trunnion type ball core is integrally formed at the other end of the valve rod, the sealing assembly sequentially comprises a pressure pad, a support ring, a lip-shaped sealing ring, an O-shaped ring and a front retaining ring from top to bottom, and the O-shaped ring is arranged in a ring groove of an outer lip-shaped sealing ring. The ball valve is directly screwed with the valve body through the packing gland and is locked through the locking nut, so that the traditional valve cover is eliminated, the structure of the ball valve is greatly simplified, and the production cost is reduced. And, the direct integrated into one piece trunnion formula ball core in valve rod bottom effectively eliminates shearing destructive power, reduces the side load in two-piece design, improves life.

Description

High-pressure ball valve

Technical Field

The utility model relates to the technical field of ball valves, in particular to a high-pressure ball valve.

Background

The high-pressure ball valve is a valve in which an opening and closing part (a ball) is driven by a valve rod and rotates around the axis of the valve rod. The high-pressure ball valve is used for hydraulic mechanical equipment, hydraulic switches, natural gas and the like, the high-pressure ball valve is appeared in the 50 th century, and along with the rapid development of scientific technology and the continuous improvement of production process and product structure, the high-pressure ball valve is rapidly developed into a main valve in short 40 years. The high-pressure ball valve is mainly used for cutting off or connecting a medium in a pipeline and can also be used for regulating and controlling fluid.

Current high-pressure ball valve mainly includes valve body, valve rod, valve ball, valve gap and gland, and the valve rod passes the valve gap and stretches into in the valve body to be connected with the valve ball, and valve gap and valve body fixed connection set up the filler between valve gap and the valve rod, and gland and valve gap threaded connection compress tightly on the filler, in order to ensure sealing performance, still need set up the sealing member between valve body and valve gap usually, lead to valve ball structure complicacy, and the cost of manufacture is high, and sealing performance is poor. Moreover, the valve stem is connected to the valve ball, the two-piece design is prone to shear failure forces, and the side loads in the two-piece design are excessive, affecting service life.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects in the background art, the utility model provides a high-pressure ball valve.

The technical scheme adopted by the utility model is as follows: the utility model provides a high-pressure ball valve, includes valve body, valve rod and handle, still includes gland, brake ring, lock nut and seal assembly, gland threaded connection is in the valve body upper end and through above-mentioned lock nut locking, the brake ring passes through the fix with screw in the gland upper end, valve rod one end is connected with the handle, and integrated into one piece has gudgeon ball core on the other end, seal assembly comprises pressure pad, support ring, lip seal circle, "O" type circle and preceding fender circle from last to down in proper order, "O" type circle sets up in the annular of lip seal outer lane.

Furthermore, the pressure pad sets up between valve rod and trunnion formula ball core, the outside arch in trunnion formula ball core upper end forms the location step, support ring, lip seal, "O" type circle and preceding retainer ring set up in between pressure pad and the location step.

Further, the valve seat is arranged in the valve body through a valve seat retainer ring, and the trunnion type ball core is in sealing fit with the valve seat.

Further, the trunnion type ball core is rotatably connected with the valve body through a bearing.

Furthermore, the two ends of the valve body are screwed with valve seat glands, the valve seat glands are tightly pressed on the valve body through gland locking nuts, and check rings and sealing rings are arranged between the valve seat glands and the valve body.

Furthermore, the valve seat gland is provided with a V-shaped bulge at one end of the trunnion type ball core, and the valve seat is provided with a V-shaped groove matched with the V-shaped bulge.

Furthermore, a flow channel for medium to pass through is arranged on the valve seat gland, the flow channel comprises a thin opening section and a thick opening section, the caliber of the thin opening section is smaller than that of the thick opening section, and the caliber of the thick opening section is the same as that of the through hole of the trunnion type ball core.

Furthermore, one side of the valve seat, which is positioned at the thin opening section, is screwed with a connecting gland, and a shaft collar is arranged between the connecting gland and the valve seat gland.

The utility model has the beneficial effects that: the ball valve is directly screwed with the valve body through the packing gland and is locked through the locking nut, so that the traditional valve cover is eliminated, the structure of the ball valve is greatly simplified, and the production cost is reduced. And, the direct integrated into one piece trunnion formula ball core in valve rod bottom effectively eliminates shearing destructive power, reduces the side load in two-piece design, improves life. In addition, through setting up seal assembly for the ball valve has better sealing performance.

In addition to the objects, features and advantages described above, other objects, features and advantages of the present invention are also provided.

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

Drawings

FIG. 1 is a schematic view of the present invention.

Fig. 2 is an enlarged schematic view of a in fig. 1.

In FIGS. 1-2: 1. a valve body; 2. a valve stem; 3. a handle; 4. a packing gland; 5. a brake ring; 6. locking the nut; 7. a screw; 8. a trunnion style ball core; 9. a pressure pad; 10. a support ring; 11. a lip-shaped seal ring; 12. an "O" ring; 13. a front retainer ring; 14. a ring groove; 15. positioning a step; 16. a valve seat retainer; 17. a bearing; 18. a valve seat gland; 19. a gland locking nut; 20. a retainer ring; 21. a seal ring; 22. a "V" shaped protrusion; 23. a V-shaped groove; 24. a thin-mouth section; 25. a wide-mouth section; 26. connecting a gland; 27. a collar.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used for explaining the relative position relationship between the components, the motion situation, and the like under a certain posture (as shown in the drawing), and if the certain posture is changed, the directional indications are changed accordingly.

The utility model provides a high-pressure ball valve.

In this embodiment, referring to fig. 1-2, this high pressure ball valve, including valve body 1, valve rod 2 and handle 3, still include gland 4, brake ring 5, lock nut 6 and seal assembly, gland threaded connection is in the valve body upper end and locks through above-mentioned lock nut, the brake ring passes through screw 7 to be fixed in the gland upper end, valve rod one end is connected with the handle, and integrated into one piece has trunnion formula ball core 8 on the other end, seal assembly comprises pressure pad 9, support ring 10, lip seal 11, "O" type circle 12 and preceding retainer ring 13 from last to down in proper order, "O" type circle sets up in the annular 14 of lip seal outer lane.

Among the above-mentioned technical scheme, the ball valve passes through gland and directly connects with the valve body soon to lock through lock nut, thereby abandon traditional valve gap, simplify the structure of ball valve greatly, reduction in production cost. And, the direct integrated into one piece trunnion formula ball core in valve rod bottom effectively eliminates shearing destructive power, reduces the side load in two-piece design, improves life. In addition, through setting up seal assembly for the ball valve has better sealing performance.

The lip of the lip-shaped sealing ring is soft, so that the lip-shaped sealing ring can be transversely expanded under the action of medium pressure to cling to the inner wall, the sealing performance is better when the pressure is higher, and the sealing performance of the ball valve is ensured.

In addition, an O-shaped ring is arranged in the annular groove of the lip-shaped sealing ring, when a medium enters the packing cavity from the bottom, the O-shaped ring moves to a gap between the packing cavity and the lip-shaped sealing ring, and therefore a leakage passage is blocked. The higher the pressure, the better the sealing, when the pressure of the filling cavity is reduced again, the O-shaped ring recovers the original shape again, and the sealing assembly adopting the combination greatly improves the sealing performance of the ball valve.

Specifically, the pressure pad sets up between valve rod and trunnion formula ball core, the outside arch in trunnion formula ball core upper end forms location step 15, support ring, lip seal, "O" type circle and preceding retaining ring set up in between pressure pad and the location step.

The packing cavity for installing the sealing assembly is formed between the pressure pad and the positioning step, the positioning step is arranged, the sealing assembly is positioned, and the working stability of the sealing assembly is improved.

Specifically, the valve seat is arranged in the valve body through a valve seat retainer 16, and the trunnion type ball core is in sealing fit with the valve seat; the trunnion type ball core is rotationally connected with the valve body through a bearing 17; the valve body both ends have connect the disk seat gland 18 soon, the disk seat gland compresses tightly on the valve body through gland lock nut 19, is equipped with retaining ring 20 and sealing washer 21 between disk seat gland and the valve body, and disk seat gland screw connects soon on the valve body, can change the use, easy dismounting, long service life.

Specifically, the valve seat gland is provided with a V-shaped bulge 22 at one end of the trunnion type ball core, and the valve seat is provided with a V-shaped groove 23 matched with the V-shaped bulge.

Through setting up "V" type arch and "V" type recess, effectively improve the leakproofness.

Specifically, a flow channel for medium to pass through is arranged on the valve seat gland, the flow channel comprises a thin opening section 24 and a thick opening section 25, the caliber of the thin opening section is smaller than that of the thick opening section, and the caliber of the thick opening section is the same as that of a through hole of the trunnion type ball core; one side of the valve seat, which is positioned at the thin opening section, is screwed with a connecting gland 26, and a shaft collar 27 is arranged between the connecting gland and the valve seat gland.

The skilled person should understand that: although the present invention has been described in terms of the above embodiments, the inventive concepts are not limited to the embodiments, and any modifications that utilize the inventive concepts are intended to be included within the scope of the appended claims.

Claims

1. The utility model provides a high-pressure ball valve, includes valve body, valve rod and handle, its characterized in that: still include gland, brake ring, lock nut and seal assembly, gland threaded connection is in the valve body upper end and through the locking nut locking of above-mentioned, the brake ring passes through the fix with screw in the gland upper end, valve rod one end is connected with the handle, and integrated into one piece has trunnion formula ball core on the other end, seal assembly is from last to constituteing by pressure pad, support ring, lip seal circle, "O" type circle and preceding retainer ring down in proper order, "O" type circle sets up in the annular of lip seal outer lane.

2. The high pressure ball valve of claim 1, wherein: the pressure pad sets up between valve rod and trunnion formula ball core, the outside arch in trunnion formula ball core upper end forms the location step, support ring, lip seal, "O" type circle and preceding retaining ring set up between pressure pad and location step.

3. The high pressure ball valve of claim 1, wherein: still include the disk seat, the disk seat passes through the disk seat retainer setting in the valve body, trunnion formula ball core and disk seat sealing fit.

4. The high pressure ball valve of claim 1, wherein: the trunnion type ball core is rotationally connected with the valve body through a bearing.

5. A high-pressure ball valve according to claim 3, wherein: the valve is characterized in that valve seat glands are screwed at two ends of the valve body and are tightly pressed on the valve body through gland locking nuts, and check rings and sealing rings are arranged between the valve seat glands and the valve body.

6. The high pressure ball valve of claim 5, wherein: the valve seat gland is located one of trunnion formula ball core and is served and be equipped with "V" type arch, be equipped with the "V" type recess with the protruding looks adaptation of "V" type on the valve seat.

7. The high pressure ball valve of claim 6, wherein: the valve seat gland is provided with a flow passage for medium to pass through, the flow passage comprises a thin opening section and a thick opening section, the caliber of the thin opening section is smaller than that of the thick opening section, and the caliber of the thick opening section is the same as that of the through hole of the trunnion type ball core.

8. The high pressure ball valve of claim 6, wherein: one side of the valve seat, which is positioned at the thin opening section, is screwed with a connecting gland, and a shaft collar is arranged between the connecting gland and the valve seat gland.