CN219159576U

CN219159576U - Stainless steel welding gate valve

Info

Publication number: CN219159576U
Application number: CN202223198867.1U
Authority: CN
Inventors: 梁志宝; 赵爱花; 范超; 徐立明
Original assignee: Yangquan Valve Co ltd
Current assignee: Yangquan Valve Co ltd
Priority date: 2022-12-01
Filing date: 2022-12-01
Publication date: 2023-06-09
Anticipated expiration: 2032-12-01

Abstract

The utility model relates to the technical field of valve machinery, in particular to a stainless steel welded gate valve, which comprises a valve body, a valve cover, a valve rod and a gate plate, wherein the valve body is connected with the valve cover through bolts; the lower end of the valve body is provided with a mounting seat, one side of the mounting seat is provided with a cleaning hole, and the outer side of the cleaning hole is connected with a cleaning side cover through a bolt. The left sealing plate and the right sealing plate are arranged in the valve body, and the gate plate is matched with the sealing plate, so that the tightness of the gate valve is enhanced, and the abrasion of the valve body is reduced; one side of the left sealing plate or the right sealing plate is provided with a spring device, so that the sealing pressure between the sealing plate and the flashboard can be adjusted, and the leakage probability caused by the abrasion of the sealing surface is reduced.

Description

Stainless steel welding gate valve

Technical Field

The utility model relates to the technical field of valve machinery, in particular to a stainless steel welding gate valve.

Background

In the gas transmission pipelines of final cooling benzene washing working section, ammonium sulfate working section and other working section in metallurgical, coking and other industries, gate valves are needed to control the on-off of the pipelines, and the medium in the gas transmission pipeline is mainly gas with acid and sulfur-containing properties, so that the gate valves which are required to be matched with the system have good corrosion resistance, the service life and sealing effect of the valves in the service period are ensured, and environmental pollution, energy waste, danger and the like caused by gas leakage are avoided.

Prior document (Liuzhen design of high-pressure flat gate valve for high-sulfur natural gas [ J ]. Valve

The gate 2020, no.228 (02): 13-15.DOI: 10.16630/j.cnki.1002-5855.2020.02.003.) discloses a high-pressure flat gate valve for high-sulfur natural gas, which is first integrally forged or integrally cast from a material such as high-sulfur resistant carbon steel WCB, WCC, LCC or nickel-based alloy Incoloy825, and has a high cost although it can achieve an anti-corrosion effect; and secondly, the flashboard sealing structure adopts a floating valve seat driven by a spring to seal, the sealing pressure is not adjustable, and the application range is limited.

Accordingly, there is a need for improvements over the prior art.

Disclosure of Invention

In order to overcome the defects in the prior art, the stainless steel welding gate valve with good sealing effect and good corrosion resistance is provided.

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

the stainless steel welded gate valve comprises a valve body, a valve cover, a valve rod and a gate plate, wherein the valve body is connected with the valve cover through bolts, a middle opening gasket is arranged on the connecting surface of the valve body and the valve cover, medium holes are formed in two sides of the valve body, the gate plate is arranged in the valve body and matched with the medium holes to realize opening and closing of the gate valve, one end of the valve rod is connected with the gate plate, the other end of the valve rod extends out of the valve cover and is connected with a transmission device through a packing gland, and packing is arranged between the packing gland and the valve cover;

the valve body lower extreme is provided with the mount pad, mount pad one side is provided with the cleaning hole, and the cleaning hole outside is through bolted connection there being clean side cap.

For convenient maintenance, the mount pad lower extreme seals through the closing cap, passes through bolted connection between closing cap and the mount pad, be provided with the ladder groove of mutually supporting on the face that the closing cap contacted with the mount pad, be provided with sealed pad in the ladder groove.

In order to improve sealing effect of the sealing gate valve, a left sealing plate and a right sealing plate are arranged in the valve body corresponding to medium holes on two sides respectively, sealing rings or sealing gaskets are arranged between the left sealing plate, the right sealing plate and the valve body, the flashboard is arranged between the left sealing plate and the right sealing plate, and hard alloy layers are arranged on the annular surfaces of the flashboard, which are in contact with the left sealing plate and the right sealing plate.

In order to guide the movement of the flashboard, left and right displacement is prevented in the opening and closing process of the flashboard, L-shaped guide plates are fixedly connected to the two sides of the left sealing plate and the right sealing plate along the height direction of the valve body, and the L-shaped guide plates of the left sealing plate and the right sealing plate are matched to form a vertical guide groove for the flashboard to slide.

In order to make flashboard and closing plate laminating, the outside of L shape baffle is provided with a plurality of guiding holes along length direction, be provided with the through-hole coaxial with the guiding hole corresponding to guiding hole position on valve body or the valve gap, the welding has adjusting nut outward of through-hole, adjusting nut internal thread connection has adjusting bolt, adjusting bolt's afterbody coaxial coupling has a step shaft, step shaft's big footpath end and through-hole sliding connection and be provided with the sealing washer, step shaft's little footpath end and guiding hole sliding connection, the cover is equipped with compression spring on the step shaft, compression spring one end is contradicted with step of step shaft, the compression spring other end is contradicted with L shape baffle.

Further, the middle opening gasket is an acid-resistant asbestos plate.

In order to improve the corrosion resistance of the gate valve, the valve body, the valve cover, the flashboard and the valve rod are all made of stainless steel.

Compared with the prior art, the utility model has the following beneficial effects:

1. according to the utility model, the valve body and the valve cover are made of corrosion-resistant stainless steel materials, so that the corrosion resistance of the valve is better, and the middle opening gasket is made of acid-resistant asbestos plates, so that the corrosion resistance of the gasket is increased, and the valve is ensured not to leak.

2. The left sealing plate and the right sealing plate are arranged in the valve body, and the gate plate is matched with the sealing plate, so that the tightness of the gate valve is enhanced, and the abrasion of the valve body is reduced; one side of the left sealing plate or the right sealing plate is provided with a spring device, so that the sealing pressure between the sealing plate and the flashboard can be adjusted, and the leakage probability caused by the abrasion of the sealing surface is reduced.

Drawings

The following detailed description of the utility model will be given with reference to the accompanying drawings.

FIG. 1 is a schematic elevational cross-sectional view of the present utility model;

FIG. 2 is an enlarged view of a portion of FIG. 1A;

FIG. 3 is a schematic side cross-sectional view of the present utility model;

fig. 4 is a partial enlarged view of a in fig. 2.

In the figure: 1-valve body, 2-valve cover, 3-valve rod, 4-flashboard, 5-mid-hole gasket, 6-medium hole, 7-packing gland, 8-packing, 9-mount pad, 10-cleaning hole, 11-cleaning side cover, 12-closing cover, 13-ladder groove, 14-gasket, 15-left sealing plate, 16-right sealing plate, 17-sealing ring, 18-hard alloy layer, 19-L-shaped guide plate, 20 vertical guide groove, 21-guide hole, 22-through hole, 23-adjusting nut, 24-adjusting bolt, 25-ladder shaft, 26-compression spring.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Examples:

as shown in fig. 1 to 4, a stainless steel welded gate valve comprises a valve body 1, a valve cover 2, a valve rod 3 and a gate plate 4, wherein the valve body 1 and the valve cover 2 are connected through bolts, a middle opening gasket 5 is arranged on the connecting surface of the valve body 1 and the valve cover 2, the middle opening gasket 5 is made of acid-proof asbestos plates, corrosion resistance is enhanced, and leakage caused by corrosion of the middle opening gasket 5 is avoided. The valve body 1, the valve cover 2, the flashboard 4 and the valve rod 3 are all made of stainless steel materials.

The two sides of the valve body 1 are provided with medium holes 6 for communicating with a pipeline, the flashboard 4 is arranged in the valve body 1 and matched with the medium holes 6 to realize the opening and closing of the gate valve, the positions, corresponding to the medium holes 6 on the two sides, in the valve body 1 are respectively provided with a left sealing plate 15 and a right sealing plate 16, sealing rings 17 or sealing gaskets are arranged between the left sealing plate 15, the right sealing plate 16 and the valve body 1, one of the left sealing plate 15 and the right sealing plate 16 can slightly float along the normal direction of the end face, and the floating distance ensures that the pressure of the sealing rings 17 is always in a reliable sealing range.

The two sides of the left sealing plate 15 and the right sealing plate 16 are fixedly connected with L-shaped guide plates 19 along the height direction of the valve body 1, the L-shaped guide plates 19 of the left sealing plate 15 and the right sealing plate 16 are matched to form a vertical guide groove 20 for sliding the flashboard 4, the movement of the flashboard is guided through the vertical guide groove 20, the deviation is prevented, and a floating gap is reserved between the L-shaped guide plates of the left sealing plate 15 and the right sealing plate 16.

The outside of L shape baffle 19 is provided with a plurality of guiding holes 21 along length direction, be provided with on valve body 1 or the valve gap 2 corresponding to guiding hole 21 position with the coaxial through-hole 22 of guiding hole 21, the welding has adjusting nut 23 outward of through-hole 22, adjusting nut 23 internal thread is connected with adjusting bolt 24, the sealing pressure of closing plate is controlled through adjusting bolt 24, the afterbody coaxial coupling of adjusting bolt 24 has step shaft 25, step shaft 25's big diameter end and through-hole 22 sliding connection and be provided with the sealing washer, prevent that the medium from taking place to leak from through-hole 22, step shaft 25's little diameter end and guiding hole 21 sliding connection, step shaft 25's little diameter end and guiding hole bottom do not contact, the cover is equipped with compression spring 26 on the step shaft 25, compression spring 26 one end is contradicted with step shaft 25's step, the compression spring 26 other end is contradicted with L shape baffle 19, through rotatory adjusting bolt 24, can change compression spring 26's deformation length, and then change sealing pressure between closing plate and the flashboard.

The flashboard 4 is arranged between the left sealing plate 15 and the right sealing plate 16, and hard alloy layers 18 are arranged on the annular surfaces of the flashboard 4, which are contacted with the left sealing plate 15 and the right sealing plate 16, so that the wear resistance is enhanced.

One end of the valve rod 3 is connected with the flashboard 4, the other end of the valve rod 3 extends out of the valve cover 2 and is connected with a transmission device through a packing gland 7, packing 8 is arranged between the packing gland 7 and the valve cover 2, and tightness with the valve cover is guaranteed.

The lower extreme of valve body 1 is provided with mount pad 9, mount pad 9 one side is provided with clean hole 10, and the clean side cap 11 is connected with through the bolt in clean hole 10 outside, opens clean side cap 11 and can carry out simple and easy cleanness to the valve body. The lower extreme of mount pad 9 seals through closing cap 12, and when the valve body cohered more impurity, the accessible was opened the closing cap and is maintained and clean, passes through bolted connection between closing cap 12 and the mount pad 9, is provided with the ladder groove 13 of mutually supporting on the face that closing cap 12 contacted with mount pad 9, is provided with sealed pad 14 in the ladder groove 13, prevents to take place to leak.

The preferred embodiments of the present utility model have been described in detail, but the present utility model is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the spirit of the present utility model, and the various changes are included in the scope of the present utility model.

Claims

1. A stainless steel welding gate valve, characterized in that: the valve comprises a valve body (1), a valve cover (2), a valve rod (3) and a flashboard (4), wherein the valve body (1) is connected with the valve cover (2) through bolts, a middle opening gasket (5) is arranged on the connecting surface of the valve body (1) and the valve cover (2), medium holes (6) are formed in two sides of the valve body (1), the flashboard (4) is arranged in the valve body (1) and matched with the medium holes (6) to realize opening and closing of the gate valve, one end of the valve rod (3) is connected with the flashboard (4), the other end of the valve rod (3) extends out of the valve cover (2) and is connected with a transmission device through a packing gland (7), and a packing (8) is arranged between the packing gland (7) and the valve cover (2);

the valve is characterized in that an installation seat (9) is arranged at the lower end of the valve body (1), a cleaning hole (10) is formed in one side of the installation seat (9), and a cleaning side cover (11) is connected to the outer side of the cleaning hole (10) through a bolt.

2. A stainless steel welding gate valve as defined in claim 1, wherein: the lower end of the mounting seat (9) is sealed through a sealing cover (12), the sealing cover (12) is connected with the mounting seat (9) through bolts, a mutually matched stepped groove (13) is formed in the surface, which is contacted with the mounting seat (9), of the sealing cover (12), and a sealing gasket (14) is arranged in the stepped groove (13).

3. A stainless steel welding gate valve as defined in claim 1, wherein: the valve is characterized in that a left sealing plate (15) and a right sealing plate (16) are respectively arranged in the valve body (1) corresponding to the positions of the medium holes (6) on two sides, a sealing ring (17) or a sealing gasket is arranged between the left sealing plate (15), the right sealing plate (16) and the valve body (1), the flashboard (4) is arranged between the left sealing plate (15) and the right sealing plate (16), and hard alloy layers (18) are arranged on the annular surfaces of the flashboard (4) contacted with the left sealing plate (15) and the right sealing plate (16).

4. A stainless steel welding gate valve as claimed in claim 3, wherein: the two sides of the left sealing plate (15) and the right sealing plate (16) are fixedly connected with L-shaped guide plates (19) along the height direction of the valve body (1), and the L-shaped guide plates (19) of the left sealing plate (15) and the right sealing plate (16) are matched to form a vertical guide groove (20) for sliding the flashboard (4).

5. A stainless steel welding gate valve as defined in claim 4, wherein: a plurality of guide holes (21) are formed in the outer side of the L-shaped guide plate (19) along the length direction, through holes (22) coaxial with the guide holes (21) are formed in the valve body (1) or the valve cover (2) corresponding to the guide holes (21), adjusting nuts (23) are welded outside the through holes (22), adjusting bolts (24) are connected with inner threads of the adjusting nuts (23), stepped shafts (25) are coaxially connected with the tail parts of the adjusting bolts (24), the large shaft diameter end of the stepped shaft (25) is slidably connected with the through hole (22) and is provided with a sealing ring, the small shaft diameter end of the stepped shaft (25) is slidably connected with the guide hole (21), the stepped shaft (25) is sleeved with a compression spring (26), one end of the compression spring (26) is abutted against a step of the stepped shaft (25), and the other end of the compression spring (26) is abutted against the L-shaped guide plate (19).

6. A stainless steel welding gate valve as defined in claim 1, wherein: the middle opening gasket (5) is an acid-resistant asbestos plate.

7. A stainless steel welding gate valve as defined in claim 1, wherein: the valve body (1), the valve cover (2), the flashboard (4) and the valve rod (3) are all made of stainless steel materials.