CN217271991U

CN217271991U - Expansion gate valve flashboard limit structure

Info

Publication number: CN217271991U
Application number: CN202220120283.3U
Authority: CN
Inventors: 韩泽海; 梁若莲
Original assignee: Dhv Valve & Foundry Suzhou Co ltd
Current assignee: Dhv Valve & Foundry Suzhou Co ltd
Priority date: 2022-01-18
Filing date: 2022-01-18
Publication date: 2022-08-23
Anticipated expiration: 2032-01-18

Abstract

The utility model relates to an inflation gate valve flashboard limit structure, including the valve body, set up flashboard in the valve body, set up in the valve gap of valve body top and wear to establish in the valve gap and the valve rod of being connected with the flashboard, the valve gap inner top is fixed with a detachable setting element, and when this inflation gate valve was opened completely, the lower extreme of setting element was supported with the upper end of flashboard and is leaned on. This inflation gate valve flashboard limit structure reasonable in design can realize accurate spacing to the flashboard under the condition of boss wearing and tearing, and convenient the change can reduce the repair cost of original design.

Description

Expansion gate valve flashboard limit structure

Technical Field

The utility model relates to a gate valve field, in particular to inflation gate valve flashboard limit structure.

Background

Referring to the attached drawing 2, after the valve rod lifts the gate plate, the gate plate is contacted with a boss in the valve cover to limit the opening position of the valve, and the valve is easily abraded by the boss after being frequently opened and closed, so that the limit is not accurate. Because the boss and the valve cover are connected into a whole, the boss cannot be adjusted, the valve cover needs to be replaced again, and the use cost is increased.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the technical problem that will solve is: in order to overcome the defects of the prior art, the limiting structure of the expansion gate valve flashboard can be replaced and adjusted to be limited.

In order to achieve the above technical effect, the utility model discloses a technical scheme is: the utility model provides an inflation gate valve flashboard limit structure, includes the valve body, sets up flashboard in the valve body, sets up in the valve gap of valve body top and wear to establish in the valve gap and the valve rod of being connected with the flashboard, the top is fixed with a detachable setting element in the valve gap, and when this inflation gate valve was opened completely, the lower extreme of setting element was supported with the upper end of flashboard and is leaned on.

Furthermore, the locating piece is a vertically arranged limit screw, a threaded hole is formed in the inner top of the valve cover, and the limit screw is in threaded connection with the threaded hole.

Furthermore, the limiting screw is fixed with the inner top of the valve cover through spot welding.

Further, an O-shaped ring is arranged between the valve body and the valve cover.

Further, valve body and valve gap are provided with seal groove and lower seal groove respectively, the O shape circle is located between seal groove and the lower seal groove.

Further, a packing seal assembly is arranged between the valve rod and the valve cover.

Further, the packing seal assembly comprises a packing backing ring, graphite packing and a packing pressing sleeve which are sequentially arranged from bottom to top, a pressing plate is arranged above the packing pressing sleeve, and the pressing plate and the valve cover are fixed through bolts.

Further, a disc spring is arranged above the pressing plate, and the bolt penetrates through the disc spring and the pressing plate and then is in threaded connection with the valve cover.

Compared with the prior art, the beneficial effects of the utility model are that: this inflation gate valve flashboard limit structure reasonable in design can realize accurate spacing to the flashboard under the condition of boss wearing and tearing, and convenient the change can reduce the repair cost of original design.

The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clearly understood, the present invention may be implemented according to the content of the description, and in order to make the above and other objects, features, and advantages of the present invention more clearly understood, the present invention will be further described in detail with reference to the accompanying drawings and the embodiments, and it is obvious that the described embodiments are some embodiments, not all embodiments of the present invention.

Drawings

Fig. 1 is a schematic view of the limiting structure of the gate plate of the expansion gate valve of the present invention;

FIG. 2 is a schematic diagram of a limiting structure of a gate plate of an expansion gate valve in the prior art;

the reference numbers and corresponding designations in the drawings are: 1. the valve comprises a valve body, a gate plate, a valve cover, a threaded hole, a boss, a valve rod, a positioning piece, an O-shaped ring, a packing sealing assembly, a packing backing ring, a graphite packing, a packing pressing sleeve, a pressing plate, a bolt and a disc spring, wherein the valve body is 2, the gate plate is 3, the valve cover is 31, the threaded hole is 32, the boss is 4, the valve rod is 5, the positioning piece is 6, the O-shaped ring is 7, the packing sealing assembly is 71, the packing backing ring is 72, the graphite packing is 73, the packing pressing sleeve is 74, the pressing plate is 75, the bolt is 76, and the disc spring is 76.

Detailed Description

The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic drawings and illustrate the basic structure of the present invention only in a schematic manner, and thus show only the components related to the present invention.

Referring to fig. 2, the boss 32 on the original valve cover 3 cannot accurately limit the gate plate 2 when worn, and the cost is high if the valve cover 3 is directly replaced. In the embodiment, an original valve cover 3 is improved, and a limiting structure of a gate plate 2 of an expansion gate valve is provided, referring to fig. 1, which includes a valve body 1, a gate plate 2 arranged in the valve body 1, a valve cover 3 arranged above the valve body 1, and a valve rod 4 penetrating through the valve cover 3 and connected with the gate plate 2, wherein a detachable positioning member 5 is fixed on the inner top of the valve cover 3, and when the expansion gate valve is completely opened, the lower end of the positioning member 5 abuts against the upper end of the gate plate 2; preferably, the positioning member 5 is a vertically arranged limit screw, the valve cover 3 is internally provided with a threaded hole 31 at the top, and the limit screw is in threaded connection with the threaded hole 31.

During the use, twist the screw hole 31 of valve gap 3 with stop screw in to promote flashboard 2 through valve rod 4, run through flashboard 2 through the passageway of valve body 1 and whether in its centre, make it and flashboard 2 contact in the position of adjustment stop screw, it is fixed with stop screw and valve gap 3 after the adjustment is accomplished, dismantle the setting element 5 when needs are changed can. This limit structure design is simple, can realize accurate spacing to flashboard 2 under the condition of boss 32 wearing and tearing, and convenient the change can reduce the repair cost of original design.

On the basis of the embodiment, the limiting screw is fixed with the top spot welding in the valve cover 3 to ensure the fixing effect of the limiting screw, and when the limiting screw needs to be replaced, the welding spot is only needed to be polished, and the limiting screw is screwed down.

In order to ensure the sealing performance between the valve body 1 and the valve cover 3, an O-shaped ring 6 is arranged between the valve body 1 and the valve cover 3; wherein, valve body 1 and valve gap 3 are provided with seal groove and lower seal groove respectively, and O shape circle 6 is located between seal groove and the lower seal groove.

In order to ensure the sealing performance between the valve rod 4 and the valve cover 3, a packing sealing component 7 is arranged between the valve rod 4 and the valve cover 3; preferably, the packing seal assembly 7 comprises a packing backing ring 71, a graphite packing 72 and a packing pressing sleeve 73 which are sequentially arranged from bottom to top, a pressing plate 74 is arranged above the packing pressing sleeve 73, and the pressing plate 74 and the valve cover 3 are fixed through a bolt 75.

Further, a disc spring 76 is disposed above the pressing plate 74, and a bolt 75 is threaded to the bonnet 3 after penetrating the disc spring 76 and the pressing plate 74. By adopting the disc spring 76, even if the graphite packing 72 becomes loose due to temperature and medium pressure changes and the like during use, the packing box of the valve cover 3 can always keep a certain pretightening force, so that the sealing reliability of the valve rod 4 is enhanced.

The present invention is not limited to the above specific embodiments, and for those skilled in the art, the above conception can be used without any creative work, and all the changes made fall within the protection scope of the present invention.

Claims

1. The utility model provides an inflation gate valve flashboard limit structure, includes valve body (1), sets up flashboard (2) in valve body (1), sets up valve gap (3) in valve body (1) top and wear to establish in valve gap (3) and valve rod (4) be connected with flashboard (2), its characterized in that, valve gap (3) inner top is fixed with a detachable setting element (5), and when this inflation gate valve opened completely, the lower extreme of setting element (5) supported with the upper end of flashboard (2) and leaned on.

2. The gate plate limiting structure of an expansion gate valve according to claim 1, wherein the positioning member (5) is a vertically arranged limiting screw, the valve cover (3) is internally provided with a threaded hole (31) at the top, and the limiting screw is in threaded connection with the threaded hole (31).

3. The gate plate restricting structure of an expansion gate valve according to claim 2, wherein the restricting screw is further fixed to the inner top of the valve cover (3) by spot welding.

4. The gate plate limiting structure of an expansion gate valve according to claim 3, wherein an O-ring (6) is provided between the valve body (1) and the valve cover (3).

5. The gate plate limiting structure of an expansion gate valve according to claim 4, wherein the valve body (1) and the valve cover (3) are respectively provided with an upper sealing groove and a lower sealing groove, and the O-shaped ring (6) is positioned between the upper sealing groove and the lower sealing groove.

6. The gate plate limiting structure of an expansion gate valve according to claim 3, wherein a packing seal assembly (7) is provided between the valve stem (4) and the valve cover (3).

7. The gate plate limiting structure of an expansion gate valve according to claim 6, wherein the packing sealing assembly (7) comprises a packing backing ring (71), a graphite packing (72) and a packing pressing sleeve (73) which are sequentially arranged from bottom to top, a pressing plate (74) is arranged above the packing pressing sleeve (73), and the pressing plate (74) and the valve cover (3) are fixed through a bolt (75).

8. The gate plate limiting structure of the expansion gate valve according to claim 7, wherein a disc spring (76) is arranged above the pressure plate (74), and the bolt (75) penetrates through the disc spring (76) and the pressure plate (74) and then is in threaded connection with the valve cover (3).