CN111963733A

CN111963733A - Double-sealing combined valve

Info

Publication number: CN111963733A
Application number: CN202010981547.XA
Authority: CN
Inventors: 赵学强; 郭建林
Original assignee: Jiangsu Jiangheng Valves Co ltd
Current assignee: Jiangsu Jiangheng Valves Co ltd
Priority date: 2020-09-17
Filing date: 2020-09-17
Publication date: 2020-11-20

Abstract

The invention discloses a double-sealing combined valve, which relates to the technical field of valves and comprises a first valve body, wherein one side inside the first valve body is fixedly connected with a first belleville spring, one side of the first belleville spring is provided with a first valve seat, one side of the first valve seat is provided with a valve ball, the top of the valve ball is provided with a valve rod, the top of the first valve body is provided with a stuffing box, the inside of the stuffing box is provided with a first stuffing and a second stuffing, and the top of the stuffing box is fixedly connected with a stuffing pressing sleeve. According to the invention, through the matching among the packing pressing sleeve, the packing pressing plate, the second belleville spring, the second stud and the second nut, the pretightening force is provided by the second belleville spring, the sealing performance of the valve body can be ensured under the condition of temperature change, the sealing force is provided for the axial flow type valve clack and the second valve body by the spring, the size of the sealing force is adjusted by the supporting seat, the structure is simple, the production difficulty is low, the maintenance and the replacement are convenient, and the popularization and the use are facilitated.

Description

Double-sealing combined valve

Technical Field

The invention relates to the technical field of valves, in particular to a double-seal combined valve.

Background

The valves are used for opening and closing pipelines, controlling flow direction, adjusting and controlling parameters of conveying media, and can be divided into shut-off valves, check valves, regulating valves and the like according to functions of the valves, wherein the valves are control parts in a fluid conveying system and have functions of stopping, adjusting, guiding, preventing backflow, stabilizing pressure, shunting or overflowing and relieving pressure, and the valves used for the fluid control system range from the simplest stop valves to various valves used in extremely complex automatic control systems, and the variety and the specification of the valves are quite various.

In the Chinese invention patent application number: CN201921264352.2 discloses a detachable combined valve structure. This detachable combination formula valve structure, including filtering the nut, the upper end fixed mounting who filters the nut has a valve festival pipe, movable mounting has a filtration ring between valve festival pipe and the filtration nut, the upper end of valve festival pipe is connected with a connecting valve pipe, the upper end of connecting valve pipe is connected with a leak protection pipe, the upper end movable mounting of leak protection pipe has a leak protection ring. The device is in the use, and the pretightning force of packing is fixed, and when the temperature changed, the leakproofness of valve received the influence easily, and the device structure is comparatively complicated, and the production degree of difficulty is great, is unfavorable for using widely.

Therefore, it is necessary to provide a double-sealing combination valve to solve the above problems.

Disclosure of Invention

Technical problem to be solved

The invention aims to: the invention provides a double-sealing combined valve, aiming at solving the problems of poor sealing performance and complex structure of the combined valve.

(II) technical scheme

The invention specifically adopts the following technical scheme for realizing the purpose:

a double-seal combined valve comprises a first valve body, wherein a first butterfly spring is fixedly connected to one side inside the first valve body, a first valve seat is arranged on one side of the first butterfly spring, a valve ball is arranged on one side of the first valve seat, a valve rod is arranged at the top of the valve ball, a stuffing box is arranged at the top of the first valve body, first stuffing and second stuffing are arranged inside the stuffing box, a stuffing pressing sleeve is fixedly connected to the top of the stuffing box, a stuffing pressing plate is fixedly connected to the top of the stuffing pressing sleeve, second studs penetrate through two sides of the stuffing pressing plate, a second nut is in threaded connection with the outer side of the top of each second stud, a second butterfly spring is sleeved on the outer side of each second stud, a second valve seat is arranged on one side of the valve ball, which is far away from the first valve seat, a second valve body is arranged on one side of the first valve body, and a first stud is fixedly connected to one side of the first valve body, and a first nut is in threaded connection with the outer side of one end of the first stud.

Furthermore, a second O-shaped ring is sleeved on the outer side of the second valve seat, and a third sealing ring is arranged between the stuffing box and the first valve body.

Further, a third O-shaped ring is arranged on the outer side of the middle of the valve rod.

Further, a fourth O-shaped ring is sleeved on the outer side of the bottom of the stuffing box.

Further, be equipped with first sealing washer, second sealing washer and first O type circle between first valve body and the second valve body, the inside axial-flow type valve clack that is equipped with of one end of first belleville spring, coil spring has been cup jointed in the one end outside of axial-flow type valve clack, the one end fixedly connected with supporting seat of first belleville spring.

Further, the first valve body and the second valve body are fixedly connected through a first stud and a first nut.

Further, a plane bearing is sleeved on the outer side of the bottom of the valve rod, a sliding bearing is arranged on the top of the plane bearing, and the sliding bearing is sleeved on the outer side of the valve rod.

Further, the inside of the stuffing box is provided with a screw.

(III) advantageous effects

The invention has the following beneficial effects:

1. according to the invention, through the matching among the packing pressing sleeve, the packing pressing plate, the second belleville spring, the second stud and the second nut, the pretightening force is provided by the second belleville spring, and the sealing property of the valve body can be ensured under the condition of temperature change.

2. According to the invention, the spring is used for providing sealing force for the axial flow type valve clack and the second valve body, the size of the sealing force is adjusted through the supporting seat, the structure is simple, the production difficulty is low, the maintenance and the replacement are convenient, and the popularization and the use are facilitated.

3. According to the invention, through the matching among the plane bearing, the sliding bearing and the valve rod, the movement of the valve rod is more stable and reliable, the valve rod is prevented from being damaged by pulling, and the service life of the device is effectively prolonged.

Drawings

FIG. 1 is a perspective view of the structure of the present invention;

FIG. 2 is a schematic sectional elevation view of the structure of the present invention;

FIG. 3 is an enlarged view of the structure at A in FIG. 2 according to the present invention;

fig. 4 is an enlarged schematic view of the structure at B in fig. 2 according to the present invention.

Reference numerals: 1. a first valve body; 2. a first belleville spring; 3. a first valve seat; 4. a valve ball; 5. a second valve seat; 6. a first seal ring; 7. a second seal ring; 8. a second valve body; 9. a first stud; 10. a first nut; 11. a supporting seat; 12. a coil spring; 13. an axial flow valve flap; 14. a first O-ring; 15. a second O-ring; 16. a valve stem; 17. a flat bearing; 18. a sliding bearing; 19. a third seal ring; 20. a screw; 21. a stuffing box; 22. a first filler; 23. a second filler; 24. pressing and sleeving the filler; 25. a packing press plate; 26. a second belleville spring; 27. a second stud; 28. a second nut; 29. a third O-ring; 30. and a fourth O-ring.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below 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.

Example 1

Referring to fig. 1-2, a double-sealing combined valve includes a first valve body 1, a first belleville spring 2 fixedly connected to one side of the interior of the first valve body 1, a first valve seat 3 disposed on one side of the first belleville spring 2, a valve ball 4 disposed on one side of the first valve seat 3, a valve rod 16 disposed on the top of the valve ball 4, a stuffing box 21 disposed on the top of the first valve body 1, a first stuffing 22 and a second stuffing 23 disposed inside the stuffing box 21, a stuffing pressing sleeve 24 fixedly connected to the top of the stuffing box 21, a stuffing pressing plate 25 fixedly connected to the top of the stuffing pressing sleeve 24, a second stud 27 penetrating through both sides of the stuffing pressing plate 25, a second nut 28 threadedly connected to the outside of the top of the second stud 27, a second belleville spring 26 sleeved on the outside of the second stud 27, a second valve seat 5 disposed on one side of the valve ball 4 away from the first valve seat 3, and a second valve body 8 disposed on one side of the first valve, one side of the first valve body 1 is fixedly connected with a first stud 9, and the outer side of one end of the first stud 9 is in threaded connection with a first nut 10.

In this embodiment, when the temperature changes, the first filler 22 and the second filler 23 inside the stuffing box 21 expand with heat and contract with cold due to the change of the temperature, a gap exists between the packing press plate 25 and the stuffing box 21, which affects the sealing performance of the device, at this time, under the action of the second belleville spring 26, the packing press plate 25 moves downward to make up the gap between the packing press plate 25 and the stuffing box 21, so as to ensure the sealing integrity, and through the cooperation between the packing press sleeve 24, the packing press plate 25, the second belleville spring 26, the second stud 27 and the second nut 28, the second belleville spring 26 is used to provide a pretightening force, so that the sealing performance of the valve body can be ensured under the condition of the temperature change.

Example 2

Referring to fig. 2-3, the present embodiment is further optimized based on embodiment 1, specifically, a second O-ring 15 is sleeved outside the second valve seat 5, and a third sealing ring 19 is disposed between the stuffing box 21 and the first valve body 1.

Specifically, a third O-ring 29 is disposed outside the middle of the valve stem 16.

Specifically, a fourth O-ring 30 is sleeved on the outer side of the bottom of the stuffing box 21.

Specifically, a first sealing ring 6, a second sealing ring 7 and a first O-shaped ring 14 are arranged between the first valve body 1 and the second valve body 8, an axial flow type valve clack 13 is arranged inside one end of the first butterfly spring 2, a spiral spring 12 is sleeved on the outer side of one end of the axial flow type valve clack 13, and a supporting seat 11 is fixedly connected to one end of the first butterfly spring 2.

In this embodiment, through the cooperation between second O type circle 15, third O type circle 29, first O type circle 14 and the fourth O type circle 30, form double seal at the inside of device respectively, further increase the leakproofness of device, use more reliable and more stable, utilize coil spring 12 to come to provide sealing force for axial-flow valve clack 13 and second valve body 8, adjust the size of sealing force through supporting seat 11, moreover, the steam generator is simple in structure, the production degree of difficulty is low, be convenient for maintenance and change, be favorable to using widely.

Example 3

Referring to fig. 2 and 4, the present embodiment is optimized based on embodiment 1 or embodiment 2, specifically, the first valve body 1 and the second valve body 8 are fixedly connected through a first stud 9 and a first nut 10.

Specifically, a plane bearing 17 is sleeved on the outer side of the bottom of the valve rod 16, a sliding bearing 18 is arranged on the top of the plane bearing 17, and the sliding bearing 18 is sleeved on the outer side of the valve rod 16.

Specifically, the stuffing box 21 is provided with a screw 20 inside.

In this embodiment, when the valve rod 16 moves, the friction force applied to the valve rod 16 during the movement is reduced due to the action of the plane bearing 17 and the sliding bearing 18, so that the valve rod 16 is prevented from being pulled, and the service life of the device is effectively prolonged.

In summary, the following steps: according to the invention, through the matching among the packing pressing sleeve 24, the packing pressing plate 25, the second belleville spring 26, the second stud 27 and the second nut 28, the pretightening force is provided by the second belleville spring 26, the sealing performance of the valve body can be ensured under the condition of temperature change, the sealing force is adjusted through the supporting seat 11, the structure is simple, the maintenance and the replacement are convenient, the popularization and the use are facilitated, the valve rod 16 is prevented from being damaged by pulling through the matching among the plane bearing 17, the sliding bearing 18 and the valve rod 16, and the service life of the device is effectively prolonged.

The above description is only a preferred embodiment of the present invention, and not intended to limit the present invention, and the scope of the present invention is defined by the appended claims, and all structural changes that can be made by using the contents of the description and the drawings of the present invention are intended to be covered by the scope of the present invention.

Claims

1. A double sealing combined valve comprises a first valve body (1), and is characterized in that: a first butterfly spring (2) is fixedly connected to one side of the interior of the first valve body (1), a first valve seat (3) is arranged on one side of the first butterfly spring (2), a valve ball (4) is arranged on one side of the first valve seat (3), a valve rod (16) is arranged at the top of the valve ball (4), a packing box (21) is arranged at the top of the first valve body (1), a first packing (22) and a second packing (23) are arranged in the packing box (21), a packing pressing sleeve (24) is fixedly connected to the top of the packing box (21), a packing pressing plate (25) is fixedly connected to the top of the packing pressing sleeve (24), second studs (27) penetrate through two sides of the packing pressing plate (25), a second nut (28) is in threaded connection with the outer side of the top of the second studs (27), and second butterfly springs (26) are sleeved on the outer side of the second studs (27), one side that first disk seat (3) were kept away from in valve ball (4) is equipped with second disk seat (5), one side of first valve body (1) is equipped with second valve body (8), one side fixedly connected with first double-screw bolt (9) of first valve body (1), the one end outside threaded connection of first double-screw bolt (9) has first nut (10).

2. A double seal combination valve as defined in claim 1, wherein: and a second O-shaped ring (15) is sleeved on the outer side of the second valve seat (5), and a third sealing ring (19) is arranged between the stuffing box (21) and the first valve body (1).

3. A double seal combination valve as defined in claim 1, wherein: and a third O-shaped ring (29) is arranged on the outer side of the middle part of the valve rod (16).

4. A double seal combination valve as defined in claim 1, wherein: and a fourth O-shaped ring (30) is sleeved on the outer side of the bottom of the stuffing box (21).

5. A double seal combination valve as defined in claim 1, wherein: be equipped with first sealing washer (6), second sealing washer (7) and first O type circle (14) between first valve body (1) and second valve body (8), the inside axial flow valve clack (13) that is equipped with of one end of first belleville spring (2), coil spring (12) have been cup jointed in the one end outside of axial flow valve clack (13), the one end fixedly connected with supporting seat (11) of first belleville spring (2).

6. A double seal combination valve as defined in claim 1, wherein: the first valve body (1) and the second valve body (8) are fixedly connected through a first stud (9) and a first nut (10).

7. A double seal combination valve as defined in claim 1, wherein: the outside of the bottom of the valve rod (16) is sleeved with a plane bearing (17), the top of the plane bearing (17) is provided with a sliding bearing (18), and the sliding bearing (18) is sleeved on the outside of the valve rod (16).

8. A double seal combination valve as defined in claim 1, wherein: the inside of the stuffing box (21) is provided with a screw (20).