CN218000449U

CN218000449U - Gate valve

Info

Publication number: CN218000449U
Application number: CN202222287906.9U
Authority: CN
Inventors: 季滔; 何新华
Original assignee: NINGBO YONGXIANG COPPER PIPELINE CO Ltd
Current assignee: NINGBO YONGXIANG COPPER PIPELINE CO Ltd
Priority date: 2022-08-30
Filing date: 2022-08-30
Publication date: 2022-12-09
Anticipated expiration: 2032-08-30

Abstract

The utility model relates to a gate valve, including valve body, valve gap, flashboard and valve rod, the valve gap passes through the threaded connection mode to be fixed on the valve body, the flashboard is fixed on the lower end of valve rod, the valve rod passes the mounting hole that the valve gap was established, and the flashboard is located the valve chamber that the valve body was established, be equipped with the spacing arch of round on the body of rod of valve rod, be equipped with the spacing groove of round and spacing protruding looks adaptation on the mounting hole, the lower extreme and the spacing groove of spacing arch offset, the upper end of spacing arch is parallel and level with the valve gap mutually and is spacing the spacing arch in the spacing groove through compressing tightly the subassembly; a groove is formed in the circumferential wall of the limiting protrusion, a 0-type sealing ring is placed in the groove, and the 0-type sealing ring is abutted to the groove wall of the limiting groove; the utility model has the advantages of easy operation, greatly reduced customer use cost, sealing performance are reliable and stable more.

Description

Gate valve

Technical Field

The utility model belongs to the technical field of the valve body, especially, relate to a gate valve.

Background

The gate valve plays roles of connection, cutting off and the like in the whole pipeline, has the advantages of small flow resistance, simple structure, labor saving in opening and closing, good rigidity and the like, and is widely applied to pipeline systems in various fields. Although the gate valve is basically in a normally open or normally closed state in a pipeline, the gate valve still has a certain number of times of opening and closing, particularly in certain specific environments, the valve rod is used as the weakest part of all parts, the situation that the rest parts of the valve are all intact often occurs, the valve rod is damaged, and the whole valve can only be replaced at this time, so that the cost is high, and the operation is very complicated; and the traditional valve rod uses a structure fixed by a tight ring, so that the disassembly and the assembly are very troublesome. Meanwhile, the main flow material of the sealing element sealed on the traditional gate valve is polytetrafluoroethylene, the sealing performance is good, but the sealing element is easily influenced by product rotation, temperature and the like, so that the sealing performance is influenced, and leakage is caused.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the not enough of prior art existence, and provide a gate valve, can directly change the valve rod when the valve rod damages appearing, adopt O shape circle sealed simultaneously, sealing performance is reliable and more stable, greatly reduced customer use cost, it is simple convenient to install.

The utility model aims at completing the gate valve by the following technical scheme, the gate valve comprises a valve body, a valve cover, a flashboard and a valve rod, wherein the valve cover is fixed on the valve body in a threaded connection mode, the flashboard is fixed at the lower end of the valve rod, the valve rod passes through a mounting hole arranged on the valve cover, the flashboard is positioned in a valve cavity arranged on the valve body, a circle of limiting bulge is arranged on a rod body of the valve rod, a circle of limiting groove matched with the limiting bulge is arranged on the mounting hole, the lower end of the limiting bulge is abutted against the limiting groove, the upper end of the limiting bulge is flush with the valve cover, and the limiting bulge is limited in the limiting groove through a pressing component; spacing bellied circumference wall is equipped with the recess, just 0 type sealing washer has been placed in the recess, 0 type sealing washer with the cell wall of spacing groove is inconsistent.

The utility model has the advantages that: compared with the prior art, the valve rod is limited and fixed on the valve body through the compressing assembly, so that when the valve rod is damaged, the valve rod can be replaced only by closing the pipeline and unscrewing the compressing assembly, and the valve rod replacing device has the advantages of being simple in operation and greatly reducing the use cost of a customer; meanwhile, the valve rod is sealed by the O-shaped sealing ring, the sealing performance is more stable and reliable, and the influence of the factors such as the rotation of the valve rod, the change of weather and temperature and the like on the sealing element is reduced.

Preferably, the upper end of the valve rod is provided with a stepped threaded rod, a hand wheel is sleeved on the threaded rod, and a nut is screwed on the threaded rod in a threaded connection mode to fix the hand wheel on the valve rod; the hand wheel of being convenient for like this fixes on the valve rod, and the dismouting is more convenient.

Preferably, the compression assembly comprises a compression nut and a gasket, the gasket is sleeved on the valve rod and abuts against the upper end of the limiting bulge, and the compression nut is sleeved on the valve rod and is screwed and fixed with the valve cover in a threaded connection mode; the clamp nut is convenient to fasten the valve rod through the gasket, and meanwhile, the clamp nut is convenient to disassemble and assemble between the valve rod and the valve cover.

Preferably, the upper end part of the compression nut abuts against the gasket in the screwing process, and a through hole for the compression nut to penetrate through the valve rod is formed in the center of the compression nut; make the tight upper end face between gland nut and spacing arch and valve gap of clamp that the packing ring can be fine like this, further promote the spacing stability at spacing inslot of spacing arch.

Preferably, the grooves are at least provided with two grooves which are sequentially arranged at equal intervals along the height direction of the limiting bulges, and the O-shaped sealing ring is placed in each groove; through setting up at least seal structure more than the twice, make the sealing performance of whole gate valve have obvious promotion like this, also reduced the influence of factors such as valve rod rotation, weather temperature change to the sealing member simultaneously.

Preferably, the upper end of the valve body is provided with a connecting part for connecting the valve cover, the valve cover matched with the connecting part is provided with a raised mounting part, and the valve cover is fixed on the valve body in a threaded connection mode of the mounting part and the connecting part; through the arrangement of the structure, the valve cover and the valve body can be conveniently disassembled and assembled.

Preferably, a circle of mounting groove is formed in the valve cover and surrounds the mounting portion, a flat gasket is placed in the mounting groove, and the flat gasket abuts against the upper end face of the connecting portion when the valve cover and the valve body are fastened in a rotating mode; through setting up flat gasket for the sealing performance after installation is better between valve gap and the valve body.

Drawings

Fig. 1 is a schematic view of the sectional structure of the gate valve.

The reference numbers in the drawings are respectively: 1. a valve body; 2. a valve cover; 3. a shutter plate; 4. a valve stem; 5. a compression assembly; 6. a type 0 seal ring; 7. a hand wheel; 8. a nut; 9. a flat gasket; 11. a valve cavity; 12. a connecting portion; 21. mounting holes; 22. a limiting groove; 23. an installation part; 24. mounting grooves; 41. a limiting bulge; 42. a threaded rod; 51. a compression nut; 52. a gasket; 41-1, a groove; 51-1 and through holes.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings: as shown in the attached drawing 1, the utility model discloses a valve body 1, valve gap 2, flashboard 3 and valve rod 4, valve gap 2 passes through threaded connection mode to be fixed on valve body 1, flashboard 3 is fixed on the lower end of valve rod 4, valve rod 4 passes mounting hole 21 that valve gap 2 was equipped with, and flashboard 3 is located the valve pocket 11 that valve body 1 was equipped with, be equipped with round spacing arch 41 on the body of rod of valve rod 4, be equipped with the spacing groove 22 of round and spacing arch 41 looks adaptation on mounting hole 21, the lower extreme of spacing arch 41 offsets with spacing groove 22, the upper end of spacing arch 41 is parallel and level with valve gap 2 and is spacing the spacing arch 41 in spacing groove 22 through compressing tightly subassembly 5, the setting of above-mentioned structure only limits the spacing of spacing arch 41 along the direction of height of valve body 1, there is not any restriction to the circumferential direction of valve rod 4; the circumferential wall of the limiting bulge 41 is provided with a groove 41-1, and a 0-shaped sealing ring 6,0-shaped sealing ring 6 is placed in the groove 41-1 and is abutted against the groove wall of the limiting groove 22; the grooves 41-1 are at least provided with two grooves which are sequentially arranged at equal intervals along the height direction of the limiting protrusions 41, and an O-shaped sealing ring 6 is arranged in each groove 41-1; the upper end of the valve rod 4 is provided with a stepped threaded rod 42, a hand wheel 7 is sleeved on the threaded rod 42, and a nut 8 is screwed on the hand wheel 7 in a threaded connection mode to fix the hand wheel 7 on the valve rod 4. The structure of fixing the valve rod 4 by using the compression nut 51 and the structure of two O-shaped sealing rings 6 replace the traditional structure of fixing the valve rod by using a tight ring and the structure of sealing by using a filler, so that the function of replacing the valve rod by damaging the valve rod is realized, the whole valve is replaced by damaging the valve rod as in the traditional way, and the maintenance cost and the installation cost are greatly reduced. Meanwhile, the two O-shaped sealing ring structures can effectively solve the problem that the product leakage is caused due to the influence of the rotation of the valve rod and the change of the weather temperature on the sealing element.

The compression assembly 5 comprises a compression nut 51 and a gasket 52, the gasket 52 is sleeved on the valve rod 4 and abuts against the upper end of the limiting bulge 41, and the compression nut 51 is sleeved on the valve rod 4 and is screwed and fixed with the valve cover 2 in a threaded connection mode; the upper end of the compression nut 51 abuts against the washer 52 in the screwing process, and the center of the compression nut 51 is provided with a through hole 51-1 for the compression nut 51 to penetrate through the valve rod 4.

The upper end of the valve body 1 is provided with a connecting part 12 for connecting the valve cover 2, the valve cover 2 matched with the connecting part 12 is provided with a raised mounting part 23, the valve cover 2 is fixed on the valve body 1 in a threaded connection mode of the mounting part 23 and the connecting part 12, and the mounting part 23 is positioned on the inner side of the connecting part 12; the valve cover 2 is provided with a circle of mounting groove 24, the mounting groove 24 is arranged around the mounting part 23, the flat gasket 9 is placed in the mounting groove 24, and the flat gasket 9 is rotatably fastened with the valve body 1 at the valve cover 2 and is abutted to the upper end face of the connecting part 12.

The present invention is not limited to the above embodiments, and any change is made on the shape or material composition, and all the structural designs provided by the present invention are all the deformation of the present invention, which should be considered within the protection scope of the present invention.

Claims

1. The utility model provides a gate valve, includes valve body (1), valve gap (2), flashboard (3) and valve rod (4), valve gap (2) are fixed through the threaded connection mode on valve body (1), flashboard (3) are fixed on the lower extreme of valve rod (4), valve rod (4) are passed mounting hole (21) that valve gap (2) were equipped with, just flashboard (3) are located in valve chamber (11) that valve body (1) were equipped with, its characterized in that: a circle of limiting bulges (41) are arranged on the rod body of the valve rod (4), a circle of limiting grooves (22) matched with the limiting bulges (41) are arranged on the mounting hole (21), the lower ends of the limiting bulges (41) are abutted against the limiting grooves (22), and the upper ends of the limiting bulges (41) are flush with the valve cover (2) and limit the limiting bulges (41) in the limiting grooves (22) through a pressing assembly (5); the circumferential wall of the limiting protrusion (41) is provided with a groove (41-1), an O-shaped sealing ring (6) is placed in the groove (41-1), and the O-shaped sealing ring (6) is abutted to the groove wall of the limiting groove (22).

2. The gate valve of claim 1, wherein: the upper end of valve rod (4) is equipped with cascaded threaded rod (42), through threaded rod (42) cover has hand wheel (7) to it will to have screwed nut (8) through the threaded connection mode hand wheel (7) are fixed on valve rod (4).

3. The gate valve of claim 1, wherein: the compressing assembly (5) comprises a compressing nut (51) and a gasket (52), the gasket (52) is sleeved on the valve rod (4) and abuts against the upper end of the limiting bulge (41), and the compressing nut (51) is sleeved on the valve rod (4) and is screwed and fixed with the valve cover (2) in a threaded connection mode.

4. The gate valve of claim 3, wherein: the upper end of the compression nut (51) abuts against the gasket (52) in the screwing process, and a through hole (51-1) for the compression nut (51) to penetrate through the valve rod (4) is formed in the center of the compression nut (51).

5. The gate valve of claim 1, wherein: the grooves (41-1) are at least provided with two grooves and are sequentially arranged at equal intervals along the height direction of the limiting protrusions (41), and O-shaped sealing rings (6) are arranged in each groove (41-1).

6. The gate valve of claim 1, wherein: the upper end of valve body (1) is equipped with and is used for connecting portion (12) of valve gap (2), with connecting portion (12) looks adaptation be equipped with bellied installation department (23) on valve gap (2), through installation department (23) with the threaded connection mode of connecting portion (12) will valve gap (2) is fixed on valve body (1).

7. The gate valve of claim 6, wherein: be equipped with round mounting groove (24) on valve gap (2), just mounting groove (24) center on installation department (23) set up, flat gasket (9) have been placed in mounting groove (24), just flat gasket (9) at valve gap (2) with valve body (1) fasten soon regularly with the up end of connecting portion (12) offsets.