CN219570901U - Bellows decompression stop valve - Google Patents

Abstract

The utility model provides a bellows decompression cut-off valve, which belongs to the technical field of cut-off valves. It includes a valve body, a valve stem, a valve flap, a valve cover and a valve flap seat. The lower flow channel, the disc seat is provided with a flow channel through hole connecting the upper flow channel and the lower flow channel. The valve disc includes a disc body and a disc cover detachably connected to the lower part of the valve stem. The lower part of the disc body is detachably connected with a first The sealing ring, the second sealing ring is detachably connected to the through hole of the flow channel, and the first sealing ring and the second sealing ring are provided with a sealing end face for sealing fit; in the utility model, the first sealing ring is detachably connected to the valve clack body, and The second sealing ring is detachably connected to the disc seat. When any sealing ring fails, the failed sealing ring can be replaced separately, which can effectively reduce the cost of use, and can also be matched with the first sealing ring and the second sealing ring of different specifications. The flow rate of the through hole of the flow channel is adjusted within a certain range, which has strong practicability.

Description

Bellows decompression cut-off valve

technical field

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

Background technique

The opening and closing part of the globe valve (stop valve, Globe Valve) is a plug-shaped disc, the sealing surface is flat or sea-cone, and the disc moves linearly along the centerline of the valve seat. The movement form of the valve stem, (common name: dark rod), also has a lifting and rotating rod type that can be used to control various types of fluids such as air, water, steam, various corrosive media, mud, oil, liquid metal and radioactive media. flow. Therefore, this type of shut-off valve is very suitable for cutting or regulating and throttling. Because the opening or closing stroke of the valve stem of this type of valve is relatively short, and it has a very reliable cut-off function, and because the change of the valve seat opening is proportional to the stroke of the valve disc, it is very suitable for flow adjustment.

The Chinese patent with the publication number CN216895789U that the applicant previously applied for discloses a multi-sealing high-stability stop valve, the sealing end face of the valve disc is integrated with the valve disc body, and the sealing end face of the valve disc seat is integrated with the valve body. In one piece, after the globe valve is used for a long time, the sealing end face is worn and the seal fails, and the entire valve disc and valve body need to be replaced or repaired, which increases the cost of use.

Utility model content

The purpose of the utility model is to provide a bellows decompression cut-off valve in order to overcome the shortcomings and deficiencies of the prior art.

The technical scheme adopted by the utility model is as follows: a bellows decompression cut-off valve, including a valve body, a valve stem and a valve disc, a valve cover is connected above the valve body, and a valve body is arranged in the valve body to seal with the valve disc. Matching valve disc seat, the valve disc seat divides the interior of the valve body into an upper flow channel and a lower flow channel, the valve disc seat is provided with a flow channel through hole connecting the upper flow channel and the lower flow channel, and the valve disc includes a detachable The disc body and disc cover connected to the lower part of the valve stem, a sealing cover is arranged between the lower part of the valve cover and the valve stem, a bellows is arranged on the valve stem between the sealing cover and the valve disc cover, the A first sealing ring is detachably connected to the lower part of the disc body, and a second sealing ring is detachably connected to the through hole of the flow channel, and the first sealing ring and the second sealing ring are provided with a sealing end surface that is sealingly matched.

The lower part of the valve flap body is provided with a first external thread, and the first sealing ring is provided with a first internal thread adapted to the first external thread.

The inner wall of the passage hole is provided with a second internal thread, and the second sealing ring is provided with a second external thread adapted to the second internal thread.

A limiting flange is arranged on the upper end of the first sealing ring, and an elastic gasket is arranged between the limiting flange and the second sealing ring.

A sealing flange is arranged inwardly at the bottom of the first internal thread of the first sealing ring, and the sealing flange abuts against the lower end surface of the valve clack body.

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

The mounting flange is hexagonal or octagonal.

A stuffing box is arranged between the valve cover and the valve stem, and a number of packings are arranged in the stuffing box, and a packing gland is arranged on the stuffing box, and several of the packings are pressed between the packing gland and the sealing cover .

A pressure plate is arranged above the packing gland, and an adjusting bolt is arranged between the pressure plate and the valve cover.

The valve cover is extended with a support part and is located above the pressing plate, a valve stem nut is arranged between the valve stem and the support part, and the valve stem passes through the support part and is connected with a hand wheel.

The beneficial effects of the utility model are as follows: in the utility model, the first sealing ring is detachably connected to the disc body, and at the same time, the second sealing ring is detachably connected to the disc seat. When any sealing ring fails, only the failed one can be replaced separately. The sealing ring can effectively reduce the cost of use, and it can also be matched with the first sealing ring and the second sealing ring of different specifications to adjust the flow rate of the flow channel through hole within a certain range, which is very practical.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are only some embodiments of the present utility model. For those skilled in the art, obtaining other drawings based on these drawings still belongs to the scope of the present utility model without any creative effort.

Fig. 1 is the schematic diagram of the utility model;

Fig. 2 is the cross-sectional view of valve clack and valve clack seat explosion state in the utility model;

Fig. 3 is the schematic diagram under the explosive state of valve clack and valve clack seat in the utility model;

Fig. 4 is a sectional view of the assembled state of the valve clack and the valve clack seat in the utility model;

Fig. 5 is the enlarged view of place A in Fig. 1;

In the figure, 1-valve body, 101-upper runner, 102-lower runner, 103-runner through hole, 2-valve stem, 3-disc, 31-disc body, 32-disc cover, 4-valve Cover, 5-disc seat, 6-sealing cover, 7-bellows, 8-first sealing ring, 81-limiting flange, 82-elastic gasket, 83-sealing flange, 9-second sealing ring , 10-seal end face, 11-stuffing box, 12-stuffing gland, 13-pressure plate, 14-adjusting bolt, 15-bracket, 16-stem nut, 17-handwheel.

Detailed ways

In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model will be further described in detail below in conjunction with the accompanying drawings.

It should be noted that all expressions using "first" and "second" in the embodiments of the present utility model are used to distinguish two entities with the same name but different parameters or different parameters. It can be seen that "first" and "second" " is only for the convenience of expression, and should not be understood as a limitation on the embodiments of the present utility model, and the subsequent embodiments will not explain them one by one.

The direction and position terms mentioned in the present invention, such as "up", "down", "front", "back", "left", "right", "inside", "outside", "top", " "Bottom", "side", etc., are only referring to the direction or position of the drawings. Therefore, the terms used in direction and position are used to explain and understand the utility model, rather than to limit the protection scope of the utility model.

As shown in Fig. 1 to Fig. 5, a kind of embodiment provided for the utility model:

A bellows decompression cut-off valve, including a valve body 1, a valve stem 2 and a valve disc 3, a valve cover 4 is connected above the valve body 1, and a valve body 1 is provided in the valve body 1 to seal and cooperate with the valve disc 3 Valve disc seat 5, the valve disc seat 5 divides the interior of valve body 1 into an upper flow channel 101 and a lower flow channel 102, and the valve disc seat 5 is provided with a flow channel through hole 103 communicating with the upper flow channel 101 and the lower flow channel 102. In this embodiment, the valve disc seat 5 is integrated with the valve body 1, and the valve disc 3 includes a valve disc body 31 and a valve disc cover 32 detachably connected to the lower part of the valve stem 2, and the lower part of the valve cover 4 is connected to the valve body. A sealing cover 6 is provided between the rods 2, and a bellows 7 is provided on the valve stem 2 between the sealing cover 6 and the disc cover 32, and the bellows 7 forms a double seal with the upper packing to avoid medium leakage and at the same time protect The valve stem is protected from medium erosion, prolonging the service life of the valve.

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 ring that is adapted to the first external thread. The first internal thread; the flow channel through hole 103 is detachably connected with the second seal ring 9, and the first seal ring 8 and the second seal ring 9 are provided with a sealing end surface 10 for sealing fit. Specifically, the flow channel The inner wall of the 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, which is convenient for disassembly and assembly by threaded connection. When any sealing ring fails to seal, it can only Replacing the failed sealing rings separately can effectively reduce the cost of use, and can also be matched with the first sealing ring 8 and the second sealing ring 9 of different specifications to adjust the flow rate of the flow channel through hole 103 within a certain range, which is very practical. As shown in FIG. 4 , the diameter of the channel B can be adjusted by adjusting the wall thicknesses of the first sealing ring 8 and the second sealing ring 9 .

Further, the upper end of the first sealing ring 8 is provided with a limiting flange 81, and an elastic gasket 82 is arranged between the limiting flange 81 and the second sealing ring 9, and the elastic gasket 82 is used to seal the first sealing ring. 8 and the second sealing ring 9 form a soft seal, combined with the hard seal on the sealing end faces of the two to form a double seal, which improves the sealing performance of the valve, and the elastic gasket 82 has a cushioning effect, which can prevent the first sealing ring 8 from being pressed down excessively Damage to the second sealing ring 9.

Further, a sealing flange 83 is arranged inwardly below the first internal thread part of the first sealing ring 8, and the sealing flange 83 abuts against the lower end surface of the valve clack body 31, and lifts the valve clack body 31 and the first valve clack body. The sealing performance of the joint of the sealing ring 8 prevents the medium from leaking therefrom.

The upper end of the second sealing ring 9 is provided with a mounting flange 91, and the elastic gasket 82 abuts between the limiting flange 81 and the mounting flange 91. Specifically, the mounting flange 91 is hexagonal Or octagonal, this structure can facilitate the disassembly and assembly of the second sealing ring 9 at the disc seat 5, improving the replacement efficiency.

A stuffing box 11 is arranged between the bonnet 4 and the valve stem 2, and a number of fillers are arranged in the stuffing box 11, and a stuffing gland 12 is arranged on the stuffing box 11, and a number of the stuffings are pressed against the stuffing pressure. Between the cover 12 and the sealing cover 6, 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, and the packing gland 12 presses several packings by adjusting the bolt 14. Tight in the stuffing box 11 to prevent the medium from leaking from the connection between the valve cover 4 and the valve stem 2, and improve the sealing performance; A valve stem nut 16 is arranged between 15, and the valve stem 2 runs through the bracket part 15 and is connected with a hand wheel 17, through which the valve disc 3 can be operated to lift and close, so as to realize the opening and closing of the shut-off valve.

What is disclosed above is only a preferred embodiment of the utility model, and of course it cannot limit the scope of rights of the utility model. Therefore, equivalent changes made according to the claims of the utility model still fall within the scope of the utility model.

Claims (10)

1. A bellows decompression cut-off valve, including a valve body (1), a valve stem (2) and a valve disc (3), a valve cover (4) is connected above the valve body (1), and the valve The body (1) is provided with a valve disc seat (5) sealingly matched with the valve disc (3), and the valve disc seat (5) divides the inside of the valve body (1) into an upper flow channel (101) and a lower flow channel (102) ), the valve disc seat (5) is provided with a flow channel through hole (103) connecting the upper flow channel (101) and the lower flow channel (102), characterized in that the valve disc (3) includes a detachable connection to the The disc body (31) and disc cover (32) at the lower part of the valve stem (2), and a sealing cover (6) is arranged between the lower part of the valve cover (4) and the valve stem (2), and the sealing cover ( 6) A bellows (7) is provided on the valve stem (2) between the disc cover (32), and a first sealing ring (8) is detachably connected to the lower part of the disc body (31). A second sealing ring (9) is detachably connected to the first through hole (103), and the first sealing ring (8) and the second sealing ring (9) are provided with a sealing end surface (10) for sealing fit. 2. A bellows decompression cut-off valve according to claim 1, characterized in that, the lower part of the disc body (31) is provided with a first external thread, and the first sealing ring (8) is provided with the second An external thread is adapted to the first internal thread. 3. A bellows decompression cut-off valve according to claim 1, characterized in that, the inner wall of the passage 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 decompression cut-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 the limit flange (81) An elastic gasket (82) is arranged between the second sealing ring (9). 5. A bellows decompression cut-off valve according to claim 2, characterized in that, a sealing flange (83) is arranged inwardly at the bottom of the first internal thread part of the first sealing ring (8), so that The sealing flange (83) abuts against the lower end surface of the disc body (31). 6. A bellows decompression cut-off valve according to claim 4, characterized in that, the upper end of the second sealing ring (9) is provided with a mounting flange (91), and the elastic gasket (82) resists Connected between the limit flange (81) and the installation flange (91). 7. The bellows pressure reducing stop valve according to claim 6, characterized in that, the 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 stem (2), and the stuffing box ( 11) A number of fillers are arranged inside, the stuffing box (11) is provided with a stuffing gland (12), and some of the stuffing is pressed between the stuffing gland (12) and the sealing cover (6). 9. A bellows decompression cut-off valve according to claim 8, characterized in that a pressure plate (13) is arranged above the packing gland (12), and the pressure plate (13) and the valve cover (4) Adjusting bolts (14) are arranged between them. 10. A bellows decompression cut-off valve according to claim 1, characterized in that, the valve cover (4) is extended with a bracket part (15) and is located above the pressure plate (13), and the valve stem (2 ) and the bracket part (15) is provided with a stem nut (16), and the valve stem (2) passes through the bracket part (15) and is connected with a hand wheel (17).