CN217003168U

CN217003168U - Flange ferrule type plug valve with good air tightness

Info

Publication number: CN217003168U
Application number: CN202122660367.4U
Authority: CN
Inventors: 蒋武扬
Original assignee: Shanghai Guangvalve Valve Co ltd
Current assignee: Shanghai Guangvalve Valve Co ltd
Priority date: 2021-11-02
Filing date: 2021-11-02
Publication date: 2022-07-19
Anticipated expiration: 2031-11-02

Abstract

The utility model discloses a flange cutting sleeve type plug valve with good air tightness, which comprises a valve body, a plug and a valve rod, wherein the upper end of the plug is fixedly connected with the lower end of the valve rod, a second connecting seat is arranged on the valve body, a first air blocking mechanism used for reducing gas entering the valve body is arranged in the valve body, the first air blocking mechanism comprises a propping block which is slidably sleeved on the side wall of the valve rod, the upper end of the propping block is elastically connected with the lower end of the second connecting seat through four compression springs, a second sealing groove is formed in the side wall of the propping block, and a first sealing ring is arranged in the second sealing groove. The utility model is provided with the abutting block and the first sealing ring, so that the first sealing ring can always play a role in sealing, the sealing effect of the valve body is improved, meanwhile, the maintenance frequency of the valve body is reduced, in addition, the ventilating pipe and the telescopic air bag are arranged, the effective warning effect can be realized, and people are reminded of needing to overhaul the plug valve in time.

Description

Flange ferrule type plug valve with good air tightness

Technical Field

The utility model relates to the technical field of plug valves, in particular to a flange cutting sleeve type plug valve with good air tightness.

Background

The plug valve is widely applied to oil field exploitation, transportation and refining equipment, and is also widely applied to petrochemical industry, chemical industry, coal gas, natural gas, liquefied petroleum gas, heating and ventilation industry, ships and general industry.

The existing plug valve is mainly sealed by direct contact between a precisely-machined metal plug body and a valve body inner cavity, is extremely easy to wear, is mainly sealed by a sealing ring arranged at a fixed position, and can not be effectively sealed with the valve body inner cavity after the plug body is worn, so that the whole plug valve is out of work, and the problem is solved by designing a flange cutting sleeve type plug valve with good air tightness.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the defects in the prior art and provides a flange cutting sleeve type plug valve with good air tightness.

In order to achieve the purpose, the utility model adopts the following technical scheme:

the utility model provides a flange cutting ferrule formula plug valve with good gas tightness, includes valve body, cock, valve rod, cock upper end and valve rod lower extreme fixed connection, be equipped with the second connecting seat on the valve body, be equipped with the first choke mechanism that is used for reducing in the gaseous admission valve body in the valve body, first choke mechanism cup joints the tight piece of support at the valve rod lateral wall including sliding, support tight piece upper end through four compression spring and second connecting seat lower extreme elastic connection, support tight piece lateral wall and seted up the second seal groove, be equipped with first sealing washer in the second seal groove, be equipped with the second choke mechanism that is used for reducing in the gaseous admission valve body in the valve body.

Preferably, the second choke mechanism includes the second sealing washer that sets up at the tight piece lower extreme of supporting, the tight piece lower extreme of supporting has seted up the third seal groove, second sealing washer adhesive bonding is in the third seal groove, third seal groove cross-section is the annular.

Preferably, a first sealing groove is formed in the lower end of the second connecting seat, a third sealing ring is arranged in the first sealing groove, and the section of the first sealing groove is annular.

Preferably, the upper end of the second connecting seat is fixedly connected with a first connecting seat through a plurality of bolts, the bolts are connected with nuts in a threaded manner, and the upper end of the first connecting seat is fixedly connected with a mounting seat.

Preferably, the lower end of the second connecting seat is provided with a vent pipe in a penetrating manner, the upper end of the vent pipe penetrates through the upper end of the first connecting seat, and the upper end of the vent pipe is provided with a telescopic air bag in a communicating manner.

Preferably, the abutting block part is an inclined circular truncated cone, and the four compression springs are arranged at equal intervals.

The utility model has the following beneficial effects:

1. the device is provided with the first air blocking mechanism, the abutting block moves downwards under the elastic action of the four compression springs for supplementing, the first sealing ring seals the inside of the attached valve body, and the abutting block can automatically feed and supplement after the cock is worn, so that the first sealing ring always has a sealing effect, manual operation and maintenance are not needed, the sealing effect of the valve body is improved, and the maintenance frequency of the valve body is reduced;

2. the device is provided with the second air blocking mechanism, after the plug valve is used for a longer time, the first sealing ring is seriously abraded, gas flows upwards from the gap of the first sealing ring, and the third sealing ring starts to play a sealing role at the moment and becomes a final barrier for ensuring the sealing of the plug valve, so that the sealing effect of the device is improved;

3. the device is provided with the vent pipe and the telescopic air bag, partial gas enters the telescopic air bag through the vent pipe, and the telescopic air bag expands and is coated with bright colors on the surface, so that the device has the function of warning effectively and reminds people of needing to overhaul the plug valve in time.

Drawings

FIG. 1 is a schematic structural view of a flange bite type plug valve with good air tightness according to the present invention;

FIG. 2 is an enlarged view of the structure at A in FIG. 1;

fig. 3 is an assembly diagram of the abutment block and the second seal groove of the flange ferrule type plug valve with good air tightness according to the present invention.

In the figure: 1 valve body, 2 cocks, 3 mount pads, 4 valve rods, 5 first connecting seats, 6 second connecting seats, 7 bolts, 8 first seal grooves, 9 support tight piece, 10 second seal grooves, 11 first seal rings, 12 third seal grooves, 13 second seal rings, 14 compression springs, 15 third seal rings, 16 breather pipes, 17 flexible gasbags.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

Referring to fig. 1-3, a flange cutting ferrule formula plug valve with good gas tightness includes valve body 1, cock 2,

valve rod

4, 2 upper ends of cock and 4 lower extremes of valve rod fixed connection, are equipped with second connecting seat 6 on the

valve body

1, 6 upper ends of second connecting seat through a plurality of bolts 7 fixedly connected with first connecting

seat

5, 5 upper ends fixedly connected with mount pads 3 of first connecting seat, threaded connection has the nut on the bolt 7, the quantity of bolt 7 is four, four bolts 7 equidistant settings.

The gas check valve is characterized in that a first gas check mechanism used for reducing gas entering the valve body 1 is arranged in the valve body 1, the first gas check mechanism comprises a pressing block 9 which is slidably sleeved on the side wall of the valve rod 4, the upper end of the pressing block 9 is elastically connected with the lower end of a second connecting seat 6 through four compression springs 14, a second sealing groove 10 is formed in the side wall of the pressing block 9, a first sealing ring 11 is arranged in the second sealing groove 10, the pressing block 9 is partially an inclined circular truncated cone, the pressing block 9 can move downwards under the elastic action of the compression springs 14 after the cock 2 is abraded, and is supplemented, and the four compression springs 14 are arranged at equal intervals.

Be equipped with in the valve body 1 and be used for reducing the second choke mechanism in gaseous entering valve body 1, second choke mechanism is including setting up at the second sealing washer 13 that supports tight piece 9 lower extreme, supports tight piece 9 lower extreme and has seted up third seal groove 12, second sealing washer 13 adhesive connection is in third seal groove 12, third seal groove 12 cross-section is the annular, setting up of second sealing washer 13 is used for improving cock 2 and supports the leakproofness between tight piece 9, avoids gaseous from cock 2 and support tight piece 9 clearance to pass through.

According to the utility model, the lower end of the second connecting seat 6 is provided with the first sealing groove 8, the third sealing ring 15 is arranged in the first sealing groove 8, the section of the first sealing groove 8 is annular, the third sealing ring 15 is arranged as the final sealing measure of the whole device, and when the first sealing ring 11 is worn, the third sealing ring 15 starts to play a sealing role.

The lower extreme of second connecting seat 6 runs through and is equipped with breather pipe 16, and the breather pipe 16 upper end runs through 5 upper ends of first connecting seat, and 16 upper ends of breather pipes intercommunication are equipped with flexible gasbag 17, scribble bright-colored colour on flexible gasbag 17, and gaseous entering breather pipe 16 when first sealing washer 11 wearing and tearing back, flexible gasbag 17 inflation plays the warning effect.

When the cock is used, after the cock 2 is used for a long time, the side wall of the cock 2 is abraded, the cock 2 moves downwards to ensure that the valve body 1 is closed, the abutting block 9 moves downwards under the elastic action of the four compression springs 14 for supplement, the first sealing ring 11 seals the inside of the attached valve body 1, and the abutting block 9 can automatically perform feeding supplement after the cock is abraded, so that the first sealing ring 11 always has a sealing effect, manual operation and maintenance are not needed, the sealing effect of the valve body 1 is improved, and the maintenance frequency of the valve body 1 is reduced;

after the plug valve is used for a longer time, 11 wearing and tearing of first sealing washer are serious, and gaseous from 11 gaps of first sealing washer upwards flow, and third sealing washer 15 begins to play sealed effect this moment, becomes the last protective screen that the plug valve is sealed to be guaranteed, and partial gas passes through in breather pipe 16 gets into flexible gasbag 17, and flexible gasbag 17 inflation scribbles bright-colored colour because of its surface to play warning effect effectively, reminded people's plug valve needs in time to overhaul.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be able to cover the technical scope of the present invention, the technical solutions and the practical concepts of the present invention equivalent or changed within the technical scope of the present invention.

Claims

1. A flange cutting sleeve type plug valve with good air tightness comprises a valve body (1), a plug (2) and a valve rod (4), it is characterized in that the upper end of the cock (2) is fixedly connected with the lower end of the valve rod (4), the valve body (1) is provided with a second connecting seat (6), a first air blocking mechanism for reducing air entering the valve body (1) is arranged in the valve body (1), the first choke mechanism comprises a propping block (9) which is sleeved on the side wall of the valve rod (4) in a sliding way, the upper end of the abutting block (9) is elastically connected with the lower end of the second connecting seat (6) through four compression springs (14), a second sealing groove (10) is arranged on the side wall of the abutting block (9), a first sealing ring (11) is arranged in the second sealing groove (10), and a second air blocking mechanism for reducing air entering the valve body (1) is arranged in the valve body (1).

2. The flange ferrule type plug valve with good air tightness according to claim 1, wherein the second air blocking mechanism comprises a second sealing ring (13) disposed at a lower end of the abutting block (9), a third sealing groove (12) is formed at a lower end of the abutting block (9), the second sealing ring (13) is adhesively connected in the third sealing groove (12), and a cross section of the third sealing groove (12) is annular.

3. The flange ferrule type plug valve with good air tightness according to claim 1, wherein a first sealing groove (8) is formed at the lower end of the second connecting seat (6), a third sealing ring (15) is arranged in the first sealing groove (8), and the cross section of the first sealing groove (8) is annular.

4. A flange cutting sleeve type plug valve with good air tightness according to claim 1, characterized in that the upper end of the second connecting seat (6) is fixedly connected with a first connecting seat (5) through a plurality of bolts (7), the bolts (7) are in threaded connection with nuts, and the upper end of the first connecting seat (5) is fixedly connected with a mounting seat (3).

5. A flange cutting sleeve type plug valve with good air tightness according to claim 4, characterized in that the lower end of the second connecting seat (6) is provided with a vent pipe (16) in a penetrating way, the upper end of the vent pipe (16) is provided with a first connecting seat (5) in a penetrating way, and the upper end of the vent pipe (16) is communicated with a telescopic air bag (17).

6. A flange ferrule type plug valve with good air tightness according to claim 1, characterized in that the part of the abutting block (9) is a bevel truncated cone, and four compression springs (14) are arranged at equal intervals.