CN212004330U - Corrosion-resistant corrugated pipe gate valve - Google Patents

Abstract

The utility model discloses an anticorrosion bellows gate valve, including valve body, flashboard, valve gap, valve rod, bellows subassembly and valve rod interlock spare, the valve gap is established in the valve body top, the inside valve pocket that forms of valve body and valve gap, the inside vertical establishment of valve pocket the valve rod, valve rod periphery cover is equipped with the bellows subassembly, bellows footstock and valve body fixed connection, bellows base fix in bellows subassembly lower part, the bellows subassembly outside sets up the protective sheath, protective sheath fixed connection is in bellows footstock lower part and by bellows footstock downwardly extending, the valve rod bottom sets up the flashboard, just the flashboard is connected fixedly with the valve rod, works as the lower part of protective sheath meets with the bellows base hard seal when the bellows is in compression state. The utility model discloses a having protected the valve rod when the bellows outside sets up the protective sheath and protect the bellows, reduced the medium to the erosion and abrasion of bellows, reduced the turbulent flow of medium to the vibration of bellows, structural stability is strong.

Description

Corrosion-resistant corrugated pipe gate valve

Technical Field

The utility model relates to a gate valve technical field, especially a bellows gate valve.

Background

The gate valve is widely applied to various fields of petroleum, chemical industry, steel, metallurgy, electric power and the like, and has the advantages of small flow resistance, small opening and closing torque, large application temperature range, reliable sealing and the like compared with other valves for controlling medium flow of pipelines. However, in the conventional gate valve, the packing is used for sealing between the valve rod and the valve cover, and the packing pressing sleeve, the pressing sleeve flange and the bolt maintain the pressing force of the packing surface, but in the valve opening and closing process, the lifting of the valve rod can cause the reduction of the specific pressure between the packing surface and the sealing surface of the valve rod, thereby causing the failure of the packing seal and leakage. The leakage can cause serious hazards such as environmental pollution, fire, personal safety and the like for special media such as toxic media, various chemical fluids such as acid and alkali, flammable and explosive fluids, heat-conducting oil and the like.

The bellows in the bellows gate valve among the prior art, along with the corruption of environment, the welding department often appears the crack and leads to sealing performance greatly reduced.

Disclosure of Invention

In order to solve the technical problem, the utility model provides an anticorrosion bellows stop valve.

An anti-corrosion corrugated pipe gate valve comprises a valve body, a gate plate, a valve cover, a valve rod, a corrugated pipe component and a valve rod linkage component, the valve cover is arranged above the valve body, a flow passage is formed in the valve body, a feed inlet and a discharge outlet are formed on two sides of the flow passage, a valve cavity is formed inside the valve body and the valve cover, the valve rod is vertically arranged inside the valve cavity, a corrugated pipe assembly is sleeved on the periphery of the valve rod, the top of the corrugated pipe component is provided with a corrugated pipe top seat, the bottom of the corrugated pipe component is provided with a corrugated pipe base, the corrugated pipe top seat is fixedly connected with the valve body, the corrugated pipe base is fixed at the lower part of the corrugated pipe component, the outer part of the corrugated pipe component is provided with a protective sleeve which is fixedly connected with the lower part of the corrugated pipe top seat and extends downwards from the corrugated pipe top seat, the bottom of the valve rod is provided with a flashboard which is fixedly connected with the valve rod, when the corrugated pipe is in a compressed state, the lower part of the protective sleeve is connected with the corrugated pipe base in a hard sealing mode.

Preferably, the bellows assembly includes an upper bellows, a lower bellows, and a connection ring fixedly connecting the upper bellows and the lower bellows, and an inner diameter of the connection ring is smaller than inner diameters of the upper bellows and the lower bellows.

Preferably, the bottom of the upper corrugated pipe is welded and fixed with the top of the connecting ring, and the top of the lower corrugated pipe is welded and fixed with the bottom of the connecting ring.

Preferably, the bellows gate valve still includes well bucket and bracket component, well bucket sealing connection is between valve body and valve gap, and the upper and lower both ends of well bucket are connected with valve body, valve gap through the bracket component that corresponds.

Preferably, all be equipped with the annular between the bracket component, the inside shim group that is provided with of annular, bellows footstock is located between valve gap and the well bucket, the top of valve rod is provided with valve-stem nut, the valve rod pass through valve-stem nut with valve gap spacing connection.

Preferably, the valve rod linkage part is a hand wheel, and the hand wheel is fixedly connected with the valve rod through a locking nut.

Preferably, a mounting cavity is formed in the center of the gate plate, and the gate plate is connected with the valve rod in a clamping mode.

Preferably, an annular gap is formed between the connecting ring and the valve rod, and the width of the annular gap is less than or equal to 5 mm.

Preferably, the upper bellows, the lower bellows and the connecting ring are all made of 304 stainless steel.

The beneficial effects of the utility model reside in that: the utility model protects the valve rod while protecting the corrugated pipe by arranging the protective sleeve outside the corrugated pipe, reduces the scouring abrasion of the medium to the corrugated pipe, reduces the vibration of the turbulent flow of the medium to the corrugated pipe, and has strong structural stability; the connecting ring is used for limiting the corrugated pipe with a longer stroke, so that the corrugated pipe is prevented from being deformed to cause left and right displacement during working to rub the valve rod after being used for a long time, and the service life of the corrugated pipe is prolonged; through set up the go-between the bellows, be divided into bellows and lower bellows with the bellows, the pressure sharing that receives traditional bellows reduces to set up two gasket groups, prolonged bellows life when having increased the leakproofness, and be convenient for install, dismantle.

Drawings

FIG. 1 is a schematic structural view of the present invention,

FIG. 2 is an enlarged view of a portion A,

fig. 3 is an enlarged view of a portion B in fig. a.

Reference numerals:

1. the valve comprises a valve body, 2, a flashboard, 3, a valve rod, 4, a lower gasket group, 5, a bolt, 6, a middle barrel, 7, a lower corrugated pipe, 8, a connecting ring, 9, an upper corrugated pipe, 10, an upper gasket group, 11, a valve cover, 12, a filler, 13, a valve rod nut, 14, a hand wheel, 15, a locking nut, 16, a corrugated pipe top seat, 17, a protective sleeve, 18, a lower bracket group, 19, a feeding hole, 20, a discharging hole, 21, a corrugated pipe base, 22, an upper bracket group, 23, an upper ring groove group, 24 and a lower ring groove group.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

The invention will be further described with reference to the accompanying drawings.

In order to solve the technical problem, the utility model provides a corrosion prevention ripple gate valve.

An anti-corrosion corrugated pipe gate valve comprises a valve body 1, a gate plate 2, a valve cover 11, a valve rod 3, a corrugated pipe assembly and a valve rod linkage part, wherein the valve cover 11 is arranged above the valve body 1, a flow passage is formed in the valve body 1, a feed inlet 19 and a discharge outlet 20 are formed on two sides of the flow passage, a valve cavity is formed inside the valve body 1 and the valve cover 11, the valve rod 3 is vertically arranged inside the valve cavity, the corrugated pipe assembly is sleeved on the periphery of the valve rod 3, a corrugated pipe top seat 16 is arranged at the top of the corrugated pipe assembly, a corrugated pipe base 21 is arranged at the bottom of the corrugated pipe assembly, the corrugated pipe top seat 16 is fixedly connected with the valve body 1, the corrugated pipe base 21 is fixed at the lower part of the corrugated pipe assembly, a protective sleeve 17 is arranged outside the corrugated pipe assembly, the protective sleeve 17 is fixedly connected to, the lower portion of the protective sleeve 17 is in a hard sealing engagement with the bellows base 21 when the bellows is in a compressed state. The center of the gate plate 2 forms an installation cavity, and the gate plate 2 is connected with the valve rod 3 in a clamping mode.

The feed inlet 19 is located same horizontal straight line with discharge gate 20, the feed inlet 19 is established and is set up respectively at the both ends of runner with discharge gate 20, works as when the stop valve is in the off-state, flashboard 2 blocks the runner. Through setting up protective sheath 17, when the bellows was in the compression state, the bellows stop valve was in the conducting state, and the lower part of protective sheath 17 and bellows base 21 hard sealing contact this moment, in the cavity between protective sheath 17 and the bellows can't be got into to the medium, the medium is in transportation process, can not vibrate the bellows because of the turbulent flow, in addition, has also avoided the medium to the washing of bellows to destroy. That is to say, the utility model discloses a having protected valve rod 3 when bellows outside sets up protective sheath 17 and protect the bellows, reduced the medium to the erosive wear of bellows, reduced the turbulent flow of medium to the vibration of bellows, structural stability is strong.

Specifically, the bellows assembly includes an upper bellows 9, a lower bellows 7, and a connection ring 8 fixedly connecting the upper bellows 9 and the lower bellows 7, and an inner diameter of the connection ring 8 is smaller than inner diameters of the upper bellows 9 and the lower bellows 7. An annular gap is formed between the connecting ring 8 and the valve rod 3, and the width of the annular gap is less than or equal to 5 mm. When the corrugated pipe stop valve is suitable for a pipeline with a larger caliber, the corrugated pipe stop valve is required to have a longer stroke, the corrugated pipe with the longer stroke is limited by the connecting ring, the valve rod 3 is prevented from being rubbed by the left and right displacement of the corrugated pipe during working due to deformation after long-term use, and the service life of the corrugated pipe is prolonged; through set up go-between 8 between the bellows, divide into bellows 9 and bellows 7 down with the bellows, the pressure sharing that receives traditional bellows reduces to set up two gasket groups, prolonged bellows life when having increased the leakproofness, and be convenient for installation, dismantlement. In practice, if the diameter of the inlet 19 is larger, for example, when the diameter is larger than 600mm, the bellows assembly may be provided with a plurality of connecting rings 8, and the connecting rings 8 are spaced apart to divide the bellows assembly into a plurality of bellows segments, in order to improve the guiding performance of the bellows. With this arrangement, the hard connection ring 8 is not elastically deformed as is common with a bellows due to a long-term use, so that the structure of the bellows assembly is more stable.

In specific implementation, the bottom of the upper corrugated pipe 9 is welded and fixed with the top of the connecting ring 8, and the top of the lower corrugated pipe 7 is welded and fixed with the bottom of the connecting ring 8.

Bellows gate valve still includes well bucket 6 and bracket component, well bucket 6 sealing connection is between valve body 1 and valve gap 11, and the upper and lower both ends of well bucket 6 are connected with valve body 1, valve gap 11 through the bracket component that corresponds. The bracket assembly comprises an upper bracket assembly for connecting the valve cover 11 with the middle barrel 6 and a lower bracket assembly for connecting the middle barrel 6 with the valve body 1. All corresponding being equipped with the annular between each bracket component, gasket group 10 and lower gasket group 4 are gone up in the inside setting that sets up of annular corresponds, bellows top seat 16 is located between valve gap 11 and well bucket 6, the top of valve rod 3 is provided with valve-stem nut 13, valve rod 3 pass through valve-stem nut 13 with valve gap 11 limit connection. The annular is divided into upper annular groove group 23 and lower annular groove group 24, go up gasket group 10 and be located upper annular groove group 23, lower gasket group 4 is located lower annular groove group 24, upper annular groove group 23 is located upper bracket group 22, lower annular groove group 24 is located lower bracket group 18. The valve rod linkage part is a hand wheel 14, and the hand wheel 14 is fixedly connected with the valve rod 3 through a locking nut 15. The upper bellows 9, the lower bellows 7 and the connecting ring 8 may be all made of 304 stainless steel.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (9)

1. The utility model provides an anticorrosion bellows gate valve, includes valve body, flashboard, valve gap, valve rod, bellows subassembly and valve rod interlock spare, its characterized in that: the utility model discloses a bellows valve structure, including valve body, valve rod, bellows footstock, valve rod top, valve rod top, bellows footstock, valve rod fixed connection, bellows footstock, bellows base, bellows subassembly outside sets up the protective sheath, protective sheath fixed connection is in bellows footstock lower part and by bellows footstock downwardly extending, the valve rod bottom sets up the flashboard, just the flashboard is connected fixedly with the valve rod, works as the lower part of protective sheath meets with the bellows base is sealed firmly when the bellows is in the compression state.

2. The corrosion protection bellows gate valve of claim 1, wherein: the corrugated pipe assembly comprises an upper corrugated pipe, a lower corrugated pipe and a connecting ring fixedly connected with the upper corrugated pipe and the lower corrugated pipe, and the inner diameter of the connecting ring is smaller than that of the upper corrugated pipe and that of the lower corrugated pipe.

3. The corrosion protection bellows gate valve of claim 2, wherein: the bottom of the upper corrugated pipe is welded and fixed with the top of the connecting ring, and the top of the lower corrugated pipe is welded and fixed with the bottom of the connecting ring.

4. The corrosion protection bellows gate valve of claim 2, wherein: the corrugated pipe gate valve further comprises a middle barrel and a support component, the middle barrel is connected between the valve body and the valve cover in a sealing mode, and the upper end and the lower end of the middle barrel are connected with the valve body and the valve cover through the corresponding support components.

5. The corrosion protection bellows gate valve of claim 4, wherein: all be equipped with the annular between the bracket component, the inside shim group that is provided with of annular, the bellows footstock is located between valve gap and the well bucket, the top of valve rod is provided with valve-stem nut, the valve rod pass through valve-stem nut with valve gap limit connection.

6. The corrosion protection bellows gate valve of claim 2, wherein: the valve rod linkage piece is a hand wheel, and the hand wheel is fixedly connected with the valve rod through a locking nut.

7. The corrosion protection bellows gate valve of claim 2, wherein: the central installation cavity that forms of flashboard, just the flashboard clamps with the valve rod and installs the connection.

8. The corrosion protection bellows gate valve of claim 2, wherein: an annular gap is formed between the connecting ring and the valve rod, and the width of the annular gap is less than or equal to 5 mm.

9. The corrosion protection bellows gate valve of claim 2, wherein: the upper corrugated pipe, the lower corrugated pipe and the connecting ring are all made of 304 stainless steel.

Images