CN215487745U

CN215487745U - PE end elastic sealing gas gate valve

Info

Publication number: CN215487745U
Application number: CN202122199076.XU
Authority: CN
Inventors: 朱国强; 刘文修; 刘华顺
Original assignee: Zhejiang Zhili Valve Technology Co ltd
Current assignee: Zhejiang Zhili Valve Technology Co ltd
Priority date: 2021-09-10
Filing date: 2021-09-10
Publication date: 2022-01-11
Anticipated expiration: 2031-09-10

Abstract

A PE end elastic sealing gas gate valve belongs to the field of gas gate valves. The gate valve comprises a valve body, a gate plate, a valve rod and a valve cover, wherein a packing gland is arranged at the upper end of the valve cover, the valve rod penetrates through the valve cover and the packing gland, a packing box is arranged between the valve cover and the valve rod, an O-shaped ring and packing are sequentially arranged in the packing box from bottom to top, the lower end of the valve cover is connected with the upper end of the valve body, a metal winding gasket is arranged at the joint of the valve cover and the valve rod, and the metal winding gasket is formed by alternately overlapping and spirally winding an alloy material and a soft material. Compared with the gate valve in the prior art, the gate valve has stable sealing performance, strong reliability and prolonged service life.

Description

PE end elastic sealing gas gate valve

Technical Field

The utility model relates to the field of gas gate valves, in particular to a PE end elastic sealing gas gate valve.

Background

The gas gate valve is widely used in planning and construction of urban gas pipelines, the existing gas gate valve generally has defects in sealing performance, particularly gas leakage is easy to occur when the valve rod of the gas gate valve is rotated, and rubber gaskets used for some gas gate valves are easy to damage and lose efficacy, so that the sealing performance of the gate valve is reduced, and therefore, the gate valve with an excellent sealing effect is needed to be designed to solve the problems.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects and shortcomings of the prior art and provide the PE end elastic sealing gas gate valve with good sealing performance.

The technical scheme adopted by the utility model is as follows: the utility model provides a PE end elastic sealing gas gate valve, includes valve body, flashboard, valve rod, valve gap, the valve gap upper end is equipped with gland, valve rod runs through valve gap and gland, be equipped with the gland between valve gap and the valve rod, be equipped with O type circle and filler by supreme down in proper order in the gland, the valve gap lower extreme is connected with the valve body upper end, and its junction is equipped with metal winding gasket, metal winding gasket adopts alloy material and soft material to overlap spiral winding in turn each other and forms.

The valve body both ends pipe surface is provided with the barb, the pipe is connected with the PE pipeline, the PE pipeline outside still is provided with the metal clamp.

The metal hoop is of a detachable structure.

And the circular pipes on two sides of the valve body are respectively provided with a bleeding valve.

And the outer surface of the gate valve is provided with a polyurea coating.

The upper end of the valve rod is provided with a hand wheel, and the valve rod penetrates through the hand wheel and is in threaded connection with a hand wheel nut.

The valve cover upper flange is provided with a threaded through hole, the upper end face of the packing gland is provided with a counter bore, and the valve cover is in threaded connection with the packing gland.

The valve comprises a valve body, a valve cover and a lower flange, wherein the upper end face of the lower flange of the valve cover is provided with a counter bore, the upper end face of the upper flange of the valve body is provided with a threaded blind hole, and the valve cover is in threaded connection with the valve body.

The utility model has the following beneficial effects: aiming at the defect of poor sealing performance of the existing gas gate valve, the O-shaped ring and the filler are arranged in the filler cavity, so that air leakage is prevented when the valve rod rotates, and meanwhile, the metal wound gasket is adopted to replace a rubber gasket, so that the sealing performance between the valve body and the valve cover is prevented from being reduced due to damage and failure of the gasket; through the improvement, the gate valve has stable sealing performance, strong reliability and prolonged service life.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is within the scope of the present invention for those skilled in the art to obtain other drawings based on the drawings without inventive exercise.

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

FIG. 2 is a schematic view of a structural stuffing box of the present invention;

in the figure, 1-valve body, 2-flashboard, 3-valve rod nut, 4-valve rod, 5-metal wound gasket, 6-valve cover, 7-O-shaped ring, 8-packing, 9-packing gland, 10-handwheel, 11-handwheel nut, 12-relief valve, 13-metal hoop, 14-round pipe and 15-PE pipeline.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings.

It should be noted that all expressions using "first" and "second" in the embodiments of the present invention are used for distinguishing two entities with the same name but different names or different parameters, and it should be noted that "first" and "second" are merely for convenience of description and should not be construed as limitations of the embodiments of the present invention, which are not described in any more detail in the following embodiments.

The terms of direction and position of the present invention, such as "up", "down", "front", "back", "left", "right", "inside", "outside", "top", "bottom", "side", etc., refer to the direction and position of the attached drawings. Accordingly, the use of directional and positional terms is intended to illustrate and understand the present invention and is not intended to limit the scope of the present invention.

As shown in fig. 1, in an embodiment of the present invention, a PE end elastic sealing gas gate valve includes a valve body 1, a gate plate 2, a valve rod 4, and a valve cover 6, a packing gland 9 is disposed at an upper end of the valve cover 6, the valve rod 4 penetrates through the valve cover 6 and the packing gland 9, a packing box is disposed between the valve cover 6 and the valve rod 4, an O-ring 7 and a packing 8 are sequentially disposed in the packing box from bottom to top, a lower end of the valve cover 6 is connected with an upper end of the valve body 1, a metal winding gasket 5 is disposed at a connection position of the valve cover 6 and the valve body 1, and the metal winding gasket 5 is formed by spirally winding an alloy material and a soft material which are alternately overlapped with each other. According to the utility model, the O-shaped ring and the filler are arranged in the filler cavity, so that air leakage is prevented when the valve rod 4 rotates, the O-shaped ring 7 can be made of fluororubber, and the filler 8 can be made of polytetrafluoroethylene; adopt metal winding gasket 5 to replace the rubber gasket, it is not fragile, prevent that the gasket from damaging the inefficacy and causing sealing performance between valve body and the valve gap to reduce, metal winding gasket 5 is formed by SUS304 and graphite alternate overlapping spiral winding each other, and the metal band is fixed with the spot welding mode at the beginning and end, and sealing performance through above improvement gate valve is stable, the good reliability, increase of service life.

The outer surface of the round pipe 14 at the two ends of the valve body 1 is provided with barbs, the round pipe 14 is connected with the PE pipeline 15, the metal hoop 13 is further arranged outside the PE pipeline 15, and the PE pipeline 15 is fixed by the barbs and the metal hoop 13 and is more firm in fixation.

The metal clamp 13 is of a detachable structure, for example, fixed by using threads, and is convenient to connect with and detach from the PE pipeline 15.

The two side circular tubes 14 of the valve body 1 are respectively provided with a bleeding valve 12, so that the product has the functions of pipeline pressure relief and pressure detection.

The outer surface of the gate valve is provided with the polyurea coating, and compared with an ordinary coating which adopts an anti-corrosion measure of the polyurea coating, the gate valve is stronger in protection under the buried working condition.

The upper end of the valve rod 4 is provided with a hand wheel 10, the valve rod 4 penetrates through the hand wheel 10 to be in threaded connection with a hand wheel nut 11, and the valve rod is driven by the hand wheel and is simple in structure and durable.

The flange on the valve cover 6 is provided with a threaded through hole, the upper end face of the packing gland 9 is provided with a counter bore, and the valve cover 6 is in threaded connection with the packing gland 9.

The upper end face of the lower flange of the valve cover 9 is provided with a counter bore, the upper end face of the upper flange of the valve body 1 is provided with a threaded blind hole, and the valve cover 9 is in threaded connection with the valve body 1.

The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention, and it is therefore to be understood that the utility model is not limited by the scope of the appended claims.

Claims

1. The utility model provides a PE end elastic seal gas gate valve, includes valve body (1), flashboard (2), valve rod (4), valve gap (6), its characterized in that: valve gap (6) upper end is equipped with gland (9), valve rod (4) run through valve gap (6) and gland (9), be equipped with the stuffing box between valve gap (6) and valve rod (4), be equipped with O type circle (7) and filler (8) by supreme down in proper order in the stuffing box, valve gap (6) lower extreme and valve body (1) upper end are connected, and its junction is equipped with metal winding gasket (5), metal winding gasket (5) adopt alloy material and soft material to overlap spiral winding each other in turn and form.

2. The PE end elastomeric seal gas gate valve of claim 1, wherein: valve body (1) both ends pipe (14) surface is provided with the barb, pipe (14) are connected with PE pipeline (15), PE pipeline (15) outside still is provided with metal clamp (13).

3. The PE end elastomeric seal gas gate valve of claim 2, wherein: the metal hoop (13) is of a detachable structure.

4. The PE end elastomeric seal gas gate valve of claim 2, wherein: the two sides of the circular tube (14) of the valve body (1) are respectively provided with a bleeding valve (12).

5. The PE end elastomeric seal gas gate valve of claim 1, wherein: and the outer surface of the gate valve is provided with a polyurea coating.

6. The PE end elastomeric seal gas gate valve of claim 1, wherein: the valve rod (4) upper end is equipped with hand wheel (10), valve rod (4) run through hand wheel (10) and hand wheel nut (11) threaded connection.

7. The PE end elastomeric seal gas gate valve of claim 1, wherein: the flange is provided with a threaded through hole on the valve cover (6), the upper end face of the packing gland (9) is provided with a counter bore, and the valve cover (6) is in threaded connection with the packing gland (9).

8. The PE end elastomeric seal gas gate valve of claim 1, wherein: the valve is characterized in that a counter bore is formed in the upper end face of the lower flange of the valve cover (6), a threaded blind hole is formed in the upper end face of the upper flange of the valve body (1), and the valve cover (6) is in threaded connection with the valve body (1).