CN219570901U

CN219570901U - Bellows decompression stop valve

Info

Publication number: CN219570901U
Application number: CN202320451610.8U
Authority: CN
Inventors: 张景皓; 张建静; 潘建福
Original assignee: Hongchang Valve Co ltd
Current assignee: Hongchang Valve Co ltd
Priority date: 2023-03-06
Filing date: 2023-03-06
Publication date: 2023-08-22
Anticipated expiration: 2033-03-06

Abstract

The utility model provides a bellows decompression stop valve, which belongs to the technical field of stop valves and comprises a valve body, a valve rod, a valve clack, a valve cover and a valve clack seat, wherein the valve clack seat divides the interior of the valve body into an upper flow passage and a lower flow passage; according to the utility model, the first sealing ring is detachably connected with the valve clack body, and the second sealing ring is detachably connected with the valve clack seat, so that when any sealing ring fails in sealing, only the failed sealing ring can be independently replaced, the use cost is effectively reduced, the first sealing ring and the second sealing ring with different specifications can be matched, the flow quantity of the through holes of the flow passage can be regulated within a certain range, and the practicability is strong.

Description

Bellows decompression stop valve

Technical Field

The utility model relates to the technical field of stop valves, in particular to a bellows decompression stop valve.

Background

The opening and closing member of the stop Valve (Globe Valve) is a plug-shaped Valve clack, the sealing upper surface is a plane or a sea conical surface, and the Valve clack moves linearly along the central line of the Valve seat. The motion mode of the valve rod (common name: hidden rod) and the lifting rotating rod can be used for controlling the flow of various fluids such as air, water, steam, various corrosive media, slurry, oil products, liquid metal, radioactive media and the like. Thus, a shut-off valve of this type is very suitable for shut-off or regulation and throttling. The valve rod of the valve has relatively short opening or closing stroke, has very reliable cutting function, and is very suitable for regulating flow rate due to the proportional relation between the change of the valve seat through opening and the stroke of the valve clack.

The utility model discloses a multi-seal high-stability stop valve, which is disclosed in the prior application of the Chinese patent with publication number of CN216895789U, wherein the sealing end surface of a valve clack is integrated with a valve clack body, and the sealing end surface of a valve clack seat is integrated with a valve body.

Disclosure of Invention

The utility model aims to overcome the defects and the shortcomings of the prior art and provides a decompression stop valve for a corrugated pipe.

The technical scheme adopted by the utility model is as follows: the utility model provides a bellows decompression stop valve, includes valve body, valve rod and valve clack, the valve body top is connected with the valve gap, be provided with in the valve body with valve clack sealing fit's valve clack seat, valve clack seat separates into upper runner and runner down with the valve body inside, the valve clack seat is provided with the runner through-hole of runner and runner down on the intercommunication, the valve clack is including dismantling the valve clack body and the valve clack lid of connecting in the valve rod lower part, be provided with sealed lid between valve gap lower part and the valve rod, be provided with the bellows on the valve rod between sealed lid and the valve clack lid, valve clack body lower part can be dismantled and be connected with first sealing ring, the runner through-hole can be dismantled and be connected with the second sealing ring, first sealing ring is provided with sealing fit's sealed terminal surface with the second sealing ring.

The valve clack body lower part is provided with first external screw thread, first sealing ring sets up the first internal screw thread with first external screw thread adaptation.

The inner wall of the runner through hole is provided with a second internal thread, and the second sealing ring is provided with a second external thread matched with the second internal thread.

The upper end of the first sealing ring is provided with a limiting flange, and an elastic sealing gasket is arranged between the limiting flange and the second sealing ring.

And a sealing flange is arranged below the first internal thread part of the first sealing ring inwards, and the sealing flange is abutted against the lower end face of the valve clack body.

The upper end of the second sealing ring is provided with a mounting flange, and the elastic sealing gasket is abutted between the limiting flange and the mounting flange.

The mounting flange is hexagonal or octagonal.

A packing box is arranged between the valve cover and the valve rod, a plurality of packing is arranged in the packing box, a packing gland is arranged on the packing box, and a plurality of packing is propped between the packing gland and the sealing cover.

And a pressing plate is arranged above the packing pressing cover, and an adjusting bolt is arranged between the pressing plate and the valve cover.

The valve cover extends to have a support portion and is located the clamp plate top, be provided with the valve rod nut between valve rod and the support portion, the valve rod runs through support portion and is connected with the hand wheel.

The beneficial effects of the utility model are as follows: according to the utility model, the first sealing ring is detachably connected with the valve clack body, and the second sealing ring is detachably connected with the valve clack seat, so that when any sealing ring fails in sealing, only the failed sealing ring can be independently replaced, the use cost is effectively reduced, the first sealing ring and the second sealing ring with different specifications can be matched, the flow quantity of the through holes of the flow passage can be regulated within a certain range, and the practicability is strong.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions of the prior art, the drawings which are required in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the utility model, and that it is within the scope of the utility model to one skilled in the art to obtain other drawings from these drawings without inventive faculty.

FIG. 1 is a schematic illustration of the present utility model;

FIG. 2 is a cross-sectional view of the valve clack and valve clack seat of the present utility model in an exploded condition;

FIG. 3 is a schematic diagram of the utility model in an exploded state of the valve flap and the valve flap seat;

FIG. 4 is a cross-sectional view of the valve clack of the present utility model in an assembled state with the valve clack seat;

FIG. 5 is an enlarged view of FIG. 1 at A;

in the figure, 1-valve body, 101-upper runner, 102-lower runner, 103-runner through hole, 2-valve rod, 3-valve clack, 31-valve clack body, 32-valve clack cover, 4-valve cover, 5-valve clack seat, 6-sealing cover, 7-bellows, 8-first sealing ring, 81-limit flange, 82-elastic sealing gasket, 83-sealing flange, 9-second sealing ring, 10-sealing end face, 11-stuffing box, 12-stuffing gland, 13-pressing plate, 14-adjusting bolt, 15-bracket part, 16-valve rod nut and 17-hand wheel.

Detailed Description

The present utility model will be described in further detail with reference to the accompanying drawings, for the purpose of making the objects, technical solutions and advantages of the present utility model more apparent.

It should be noted that, in the embodiments of the present utility model, all the expressions "first" and "second" are used to distinguish two entities with the same name but different entities or different parameters, and it is noted that the "first" and "second" are only used for convenience of expression, and should not be construed as limiting the embodiments of the present utility model, and the following embodiments are not described one by one.

The terms of direction and position in the present utility model, such as "up", "down", "front", "back", "left", "right", "inside", "outside", "top", "bottom", "side", etc., refer only to the direction or position of the drawing. Accordingly, directional and positional terms are used to illustrate and understand the utility model and are not intended to limit the scope of the utility model.

As shown in fig. 1 to 5, an embodiment of the present utility model is provided:

the utility model provides a bellows decompression stop valve, includes valve body 1, valve rod 2 and valve clack 3, valve body 1 top is connected with valve gap 4, be provided with in the valve body 1 with valve clack 3 sealing fit's valve clack seat 5, valve clack seat 5 separates into upper runner 101 and runner 102 with valve body 1 inside, valve clack seat 5 is provided with the runner through-hole 103 that feeds through upper runner 101 and runner 102 down, in this embodiment, valve clack seat 5 and valve body 1 are as an organic whole, valve clack 3 is including dismantling valve clack body 31 and the valve clack lid 32 of connecting in valve rod 2 lower part, be provided with sealed lid 6 between valve gap 4 lower part and the valve rod 2, be provided with bellows 7 on valve rod 2 between sealed lid 6 and the valve clack lid 32, bellows 7 constitutes double seal with the top filler, avoids the medium to leak, can protect the valve rod to avoid receiving the medium erosion simultaneously, extension valve service life.

The lower part of the valve clack body 31 is detachably connected with a first sealing ring 8, specifically, the lower part of the valve clack body 31 is provided with a first external thread, and the first sealing ring 8 is provided with a first internal thread matched with the first external thread; the runner through hole 103 can be dismantled and be connected with second sealing ring 9, first sealing ring 8 is provided with sealed complex sealing end face 10 with second sealing ring 9, specifically, runner through hole 103 inner wall is provided with the second internal thread, second sealing ring 9 is provided with the second external screw thread with second internal screw thread adaptation, adopts threaded connection dismouting convenient, when arbitrary sealing ring seal inefficacy, can only change the sealing ring of inefficacy alone, effectively reduce use cost, and can also supporting first sealing ring 8 and second sealing ring 9 of different specifications, adjusts the circulation of runner through hole 103 in certain limit, the practicality is strong. As shown in fig. 4, the diameter of the passage B can be adjusted by adjusting the wall thicknesses of the first seal ring 8 and the second seal ring 9.

Further, the upper end of the first sealing ring 8 is provided with a limiting flange 81, an elastic sealing gasket 82 is arranged between the limiting flange 81 and the second sealing ring 9, soft sealing is formed between the first sealing ring 8 and the second sealing ring 9 by adopting the elastic sealing gasket 82, double sealing is formed by combining hard sealing of the sealing end surfaces of the first sealing ring 8 and the second sealing ring 9, the sealing performance of the valve is improved, and the elastic sealing gasket 82 has a buffering function, so that the first sealing ring 8 can be prevented from being transitionally pressed down to damage the second sealing ring 9.

Further, a sealing flange 83 is arranged below the first internal thread part of the first sealing ring 8 inwards, the sealing flange 83 is abutted against the lower end face of the valve clack body 31, the sealing performance of the joint of the valve clack body 31 and the first sealing ring 8 is improved, and medium leakage is avoided.

The second sealing ring 9 upper end is provided with the mounting flange 91, the elastic sealing pad 82 butt is between limit flange 81 and mounting flange 91, specifically, the mounting flange 91 is hexagon or octagon, and this structure can be convenient for in valve clack seat 5 department dismouting second sealing ring 9, promotes and changes efficiency.

A packing box 11 is arranged between the valve cover 4 and the valve rod 2, a plurality of packing materials are arranged in the packing box 11, a packing gland 12 is arranged on the packing box 11, a plurality of packing materials are propped between the packing gland 12 and the sealing cover 6, a pressing plate 13 is arranged above the packing gland 12, an adjusting bolt 14 is arranged between the pressing plate 13 and the valve cover 4, the packing gland 12 compresses the packing materials in the packing box 11 through the adjusting bolt 14, the medium is prevented from leaking from the joint of the valve cover 4 and the valve rod 2, and the sealing performance is improved; the valve cover 4 extends to form a support portion 15 and is located above the pressing plate 13, a valve rod nut 16 is arranged between the valve rod 2 and the support portion 15, the valve rod 2 penetrates through the support portion 15 to be connected with a hand wheel 17, and the valve clack 3 can be operated to lift through the hand wheel 17, so that the stop valve can be opened and closed.

The foregoing disclosure is illustrative of the present utility model and is not to be construed as limiting the scope of the utility model, which is defined by the appended claims.

Claims

1. The utility model provides a bellows decompression stop valve, is including valve body (1), valve rod (2) and valve clack (3), valve body (1) top is connected with valve gap (4), be provided with in valve body (1) with valve clack (3) sealing fit's valve clack seat (5), valve clack seat (5) are with valve body (1) internal partition become runner (101) and runner (102) down, valve clack seat (5) are provided with runner through-hole (103) that communicate runner (101) and runner (102) down, a serial communication port, valve clack (3) are including dismantling valve clack body (31) and valve clack lid (32) that connect in valve rod (2) lower part, be provided with sealed lid (6) between valve gap (4) lower part and valve rod (2), be provided with bellows (7) on valve rod (2) between sealed lid (6) and valve clack lid (32), first sealing ring (8) can be dismantled to be connected with in valve clack body (31) lower part, runner through-hole (103) can dismantle and be connected with second (9), sealing ring (8) and sealing ring (10) are provided with sealed end face.

2. A bellows pressure reducing shut-off valve according to claim 1, characterized in that the lower part of the flap body (31) is provided with a first external thread, and the first sealing ring (8) is provided with a first internal thread adapted to the first external thread.

3. A bellows pressure reducing shut-off valve according to claim 1, characterized in that the inner wall of the flow passage through hole (103) is provided with a second internal thread, and the second sealing ring (9) is provided with a second external thread adapted to the second internal thread.

4. A bellows pressure reducing shut-off valve according to claim 1, characterized in that the upper end of the first sealing ring (8) is provided with a limit flange (81), and that an elastic sealing gasket (82) is arranged between the limit flange (81) and the second sealing ring (9).

5. A bellows pressure reducing stop valve according to claim 2, wherein a sealing flange (83) is provided inwardly below the first internal thread portion of the first sealing ring (8), and the sealing flange (83) abuts against the lower end face of the valve flap body (31).

6. A bellows pressure reducing shut-off valve according to claim 4, characterized in that the second sealing ring (9) is provided with a mounting flange (91) at its upper end, the resilient sealing gasket (82) being in abutment between the limit flange (81) and the mounting flange (91).

7. A bellows pressure relief shut-off valve as claimed in claim 6, wherein said mounting flange (91) is hexagonal or octagonal.

8. A bellows pressure reducing stop valve according to claim 1, characterized in that a stuffing box (11) is arranged between the valve cover (4) and the valve rod (2), a plurality of stuffing materials are arranged in the stuffing box (11), a stuffing gland (12) is arranged on the stuffing box (11), and a plurality of stuffing materials are propped between the stuffing gland (12) and the sealing cover (6).

9. The bellows pressure reducing stop valve according to claim 8, characterized in that a pressure plate (13) is arranged above the packing gland (12), and an adjusting bolt (14) is arranged between the pressure plate (13) and the valve cover (4).

10. A bellows pressure reducing stop valve according to claim 1, characterized in that the valve cap (4) extends with a support part (15) and is located above the pressure plate (13), a valve rod nut (16) is arranged between the valve rod (2) and the support part (15), and the valve rod (2) is connected with a hand wheel (17) penetrating the support part (15).