CN216789278U

CN216789278U - Corrugated pipe gate valve

Info

Publication number: CN216789278U
Application number: CN202220454908.XU
Authority: CN
Inventors: 郑忠兴; 祁欢; 余孙杰; 沈伟光
Original assignee: Zhejiang Xinou Automatic Control Instrument Co ltd
Current assignee: Zhejiang Xinou Automatic Control Instrument Co ltd
Priority date: 2022-03-02
Filing date: 2022-03-02
Publication date: 2022-06-21
Anticipated expiration: 2032-03-02

Abstract

The utility model discloses a corrugated pipe gate valve, which comprises a valve body, the valve cover assembly comprises a first valve cover arranged on the valve body and a second valve cover arranged on the first valve cover, the first installation cavity corresponds to the second installation cavity in position, a corrugated pipe base is arranged between the first valve cover and the second valve cover and limited between the first valve cover and the second valve cover, a through hole matched with the diameter of the valve rod is formed in the corrugated pipe base, a corrugated pipe which is positioned in the first installation cavity and sleeved outside the valve rod is welded on the corrugated pipe base, a second annular groove is formed in one side, close to the second valve cover, of the corrugated pipe base, an elastic part is arranged in the second annular groove, a first annular groove is formed in one side, close to the first valve cover, of the corrugated pipe base, an elastic part is arranged in the first annular groove, and the first valve cover and the second valve cover are connected and fastened through threads to enable the elastic part to be in a pressed state; the utility model has good sealing performance and avoids the sealing leakage at the valve rod.

Description

Corrugated pipe gate valve

Technical Field

The utility model relates to the technical field of valves, in particular to a corrugated pipe gate valve.

Background

The bellows gate valve is a valve for opening and closing a flow passage through a gate plate, and is applied to various fluid fields due to small flow resistance, labor-saving opening and closing and simple body.

The traditional gate valve usually comprises a valve body with a T-shaped structure, a flashboard used for cutting off the circulation of a medium in a horizontal section of the T-shaped structure of the valve body, a valve cover fixedly connected with the upper end of a vertical section of the T-shaped structure of the valve body, and a valve rod, wherein one end of the valve rod penetrates through the valve cover and is fixedly connected with the flashboard and the other end of the valve rod through a rotating hand wheel. In the process of moving the valve rod up and down in use, a medium can contact the valve rod and leak to the outside of the gate valve along a gap between the valve rod and the valve cover, so that the valve rod and related equipment are easily corroded, and the environment around the gate valve is easily polluted.

Disclosure of Invention

The utility model aims to overcome the defects of the prior art and provide a corrugated pipe gate valve.

In order to achieve the purpose, the utility model provides the following technical scheme: a corrugated pipe gate valve comprises a valve body, a valve cover assembly, a valve rod and an actuating mechanism, wherein the valve cover assembly, the valve rod and the actuating mechanism are arranged on the valve body, the end, located in the valve body, of the valve rod is provided with a flashboard, a valve seat matched with the flashboard for sealing is arranged in a flow channel of the valve body, the flashboard is driven by the actuating mechanism to open and close the flow channel of the valve body, the valve cover assembly comprises a first valve cover arranged on the valve body and a second valve cover arranged on the first valve cover, a first installation cavity and a second installation cavity for the valve rod to enter are respectively arranged in the first valve cover and the second valve cover, the first installation cavity corresponds to the second installation cavity in position, a corrugated pipe base is arranged between the first valve cover and the second valve cover, a through hole matched with the diameter of the valve rod is formed in the corrugated pipe base, and a corrugated pipe positioned in the first installation cavity and sleeved outside the valve rod is welded on the corrugated pipe base, the corrugated pipe base is close to one side of second valve gap and has been seted up the second annular groove and be provided with the elastic component in the second annular groove, corrugated pipe base is close to one side of first valve gap and has been seted up first annular groove and be provided with the elastic component in the first annular groove, first valve gap passes through threaded connection fastening messenger with the second valve gap the elastic component is in the pressurized state.

Through adopting above-mentioned technical scheme, through set up bellows base between first valve gap and second valve gap, can provide sufficient mounting height for the bellows, the upper end of bellows base and the first ring channel and the second ring channel that the lower extreme set up simultaneously, and set up the elastic component in it, when first valve gap and second valve gap pass through threaded fastener and are connected, the elastic component of upper end and lower extreme is in the pressurized state, avoid the medium to reveal the gate valve outside along the gap between valve rod and valve gap, sealing performance is good.

As a preferred technical scheme of the present invention, the upper end of the bellows base is provided with a limiting portion integrally formed therewith, the limiting portion is integrally truncated cone-shaped, the diameter of the lower end surface of the limiting portion is equal to the inner diameter of the second annular groove, the lower end surface of the second valve cover is provided with an installation groove adapted to the shape of the limiting portion, and when the circular boss portion of the bellows base completely enters the installation groove, the bellows base cooperates with the first valve cover and the second valve cover to make the elastic member in a compressed state.

Through adopting above-mentioned technical scheme, set up spacing portion and can play the positioning action, make its connection more stable, it is more convenient to assemble simultaneously.

As a preferable technical solution of the present invention, the elastic member is a metal wound gasket.

Through adopting above-mentioned technical scheme, provide clearance compensation, can guarantee sealed effect.

As a preferable technical solution of the present invention, the first valve cover and the second valve cover are connected by a screw member, the first valve cover and the second valve cover are correspondingly provided with a connecting hole for the screw member to pass through, two end portions of the screw member are provided with external threads, and two ends of the screw member are respectively provided with a nut.

Through adopting above-mentioned technical scheme, the both ends part of screw rod spare sets up the external screw thread fit nut and fixes, and not only processing is convenient, and the connection of first valve gap and second valve gap is more stable moreover.

As a preferable technical scheme of the utility model, a stuffing box is arranged between the second valve cover and the valve rod, a stuffing cover is arranged on the stuffing box and extrudes a stuffing assembly in the stuffing box, and the stuffing assembly is formed by combining a plurality of layers of stuffing.

By adopting the technical scheme, the particle materials are prevented from entering the filler to cause sealing leakage at the valve rod, and the reliability of sealing can be ensured by the composition of the multiple layers of fillers.

As a preferred technical scheme of the utility model, the packing assembly comprises a sealing ring compression ring, an aramid packing, a spacer ring and a graphite packing which are sequentially arranged from bottom to top.

As a preferable technical scheme of the utility model, one side of the second valve cover is provided with a pressure gauge which is communicated with the second installation cavity.

By adopting the technical scheme, whether the bellows seal is intact can be visually observed, the bellows seal inspection device is safe and reliable, the service life is long, the maintenance frequency is low, and the operation cost is reduced.

Drawings

FIG. 1 is a front view of the present embodiment;

FIG. 2 is an enlarged view of portion A of FIG. 1;

fig. 3 is an enlarged view of a portion B of fig. 1.

Reference numerals: 1. a valve body; 2. a valve cover assembly; 3. a valve stem; 4. a shutter plate; 5. a valve seat; 6. a first valve cover; 7. a second valve cover; 8. a first mounting cavity; 9. a second mounting cavity; 10. a bellows base; 11. a bellows; 12. a second annular groove; 13. an elastic member; 14. a first annular groove; 15. a limiting part; 16. mounting grooves; 17. a screw member; 18. connecting holes; 19. a nut; 20. a stuffing box; 21. a packing gland; 22. a packing assembly; 23. a sealing ring is pressed; 24. aramid packing; 25. a spacer ring; 26. graphite packing; 27. and a pressure gauge.

Detailed Description

The present invention will be further described with reference to the following detailed description and the accompanying drawings, which are provided for the purpose of illustrating the utility model and are not intended to limit the utility model to the particular embodiments disclosed. Other embodiments obtained by persons skilled in the art without making creative efforts based on the embodiments in the implementation belong to the protection scope of the utility model.

Specific embodiments of the present invention are described below with reference to the accompanying drawings.

As shown in fig. 1 to 3, the bellows gate valve includes a valve body 1, a valve cover assembly 2 disposed on the valve body 1, a valve rod 3, and an actuating mechanism for driving the valve rod 3 to ascend and descend, a gate plate 4 is disposed at one end of the valve rod 3 located in the valve body 1, a valve seat 5 sealed by the gate plate 4 is disposed in a flow passage of the valve body 1, the gate plate 4 opens and closes the flow passage of the valve body 1 under the driving of the actuating mechanism, the valve cover assembly 2 includes a first valve cover 6 disposed on the valve body 1 and a second valve cover 7 disposed on the first valve cover 6, a first installation cavity 8 and a second installation cavity 9 for the valve rod 3 to enter are respectively disposed in the first valve cover 6 and the second valve cover 7, the first installation cavity 8 corresponds to the second installation cavity 9 in position, a bellows base 10 is disposed between the first valve cover 6 and the second valve cover 7, and the bellows base 10 is limited between the two, offer the through-hole that is used for supplying valve rod 3 to pass and diameter and valve rod adaptation on the bellows base 10, the welding of bellows base 10 has and is located first installation cavity 8 and the outer bellows 11 of valve rod 3 is located to the cover, bellows base 10 is close one side of second valve gap 7 and has been seted up second annular groove 12 and be provided with elastic component 13, bellows base 10 is close one side of first valve gap 6 and has been seted up first ring channel 14 and be provided with elastic component 13 in the first ring channel 14, first valve gap 6 makes through the threaded connection fastening with second valve gap 7 elastic component 13 is in the pressurized state.

Through set up bellows base 10 between first valve gap 6 and second valve gap 7, can provide sufficient mounting height for bellows 11, first ring channel 14 and the second ring channel 12 that the upper end and the lower extreme of bellows base 10 set up simultaneously to set up elastic component 13 in it, when first valve gap 6 passes through threaded fastener with second valve gap 7 and is connected, elastic component 13 of upper end and lower extreme is in the pressurized state, avoids the medium to reveal outside the gate valve along the gap between valve rod 3 and the valve gap, and sealing performance is good.

The upper end of the corrugated pipe base 10 is provided with a limiting part 15 integrally formed with the corrugated pipe base, the limiting part 15 is integrally in a circular truncated cone shape, the diameter of the lower end face of the limiting part 15 is equal to the inner diameter of the second annular groove 12, the lower end face of the second valve cover 7 is provided with an installation groove 16 matched with the limiting part 15 in shape, and after the circular truncated cone part of the corrugated pipe 11 base 10 completely enters the installation groove 16, the corrugated pipe base 10 is matched with the first valve cover 6 and the second valve cover 7 to enable the elastic part 13 to be in a pressed state. The limiting part 15 is arranged to play a role in positioning, so that the connection is more stable, and the assembly is more convenient.

The elastic member 13 is a metal wound gasket, provides clearance compensation, and can ensure a sealing effect, and is not limited to the metal wound gasket mentioned in this embodiment.

The first valve cover 6 and the second valve cover 7 are connected through a screw member 17, connecting holes 18 for the screw member 17 to pass through are correspondingly formed in the first valve cover 6 and the second valve cover 7, external threads are formed at two end portions of the screw member 17, and nuts 19 are respectively arranged at two ends of the screw member 17.

The two end parts of the screw member 17 are provided with external threads matched with the nuts 19 for fixing, so that the processing is convenient, and the connection between the first valve cover 6 and the second valve cover 7 is more stable.

Packing gland 20 has been seted up between second valve bonnet 7 and the valve rod 3, it forms the extrusion to be provided with packing gland 21 and packing gland 21 on the packing gland 20 to the packing assembly 22 in the packing gland 20, packing assembly 22 forms for the multilayer packing combination, avoids particulate material to get into the filler, arouses valve rod department sealed leakage, and the reliability of sealing can be guaranteed to multilayer packing component, and packing assembly 22 includes sealing washer clamping ring 23, aramid packing 24, spacer ring 25 and the graphite packing 26 that set gradually from bottom to top in this embodiment.

One side of the second valve cover is provided with a pressure gauge 27, the pressure gauge 27 is communicated with the second mounting cavity 9, whether the sealing of the corrugated pipe 11 is intact can be visually observed, the sealing device is safe and reliable, the service life is long, the maintenance frequency is low, and the operation cost is reduced.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The foregoing shows and describes the general principles, essential features, and advantages of the utility model. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, that the preferred embodiments of the present invention are described in the above embodiments and the description, and not intended to limit the present invention, and that various changes and modifications may be made within the scope of the utility model as claimed, which is defined by the appended claims and their equivalents, without departing from the spirit and scope of the utility model.

Claims

1. The utility model provides a bellows gate valve, includes the valve body, sets up valve gap subassembly, valve rod on the valve body and is used for driving the actuating mechanism that the valve rod goes up and down, the one end that the valve rod is located the valve body is provided with the flashboard, be equipped with the sealed disk seat of cooperation flashboard in the valve body runner, the flashboard opens and close the valve body runner under actuating mechanism's drive, its characterized in that: the valve cover component comprises a first valve cover arranged on the valve body and a second valve cover arranged on the first valve cover, a first mounting cavity and a second mounting cavity for the valve rod to enter are respectively arranged in the first valve cover and the second valve cover, the first installation cavity corresponds to the second installation cavity in position, a corrugated pipe base is arranged between the first valve cover and the second valve cover and limited between the first installation cavity and the second installation cavity, the corrugated pipe base is provided with a through hole matched with the diameter of the valve rod, the corrugated pipe base is welded with a corrugated pipe which is positioned in the first mounting cavity and sleeved outside the valve rod, a second annular groove is arranged on one side of the corrugated pipe base close to the second valve cover, an elastic piece is arranged in the second annular groove, a first annular groove is formed in one side, close to the first valve cover, of the corrugated pipe base, an elastic piece is arranged in the first annular groove, the first valve cover and the second valve cover are fastened through threaded connection, so that the elastic piece is in a pressed state.

2. The bellows gate valve of claim 1, wherein: the upper end of bellows base is provided with rather than integrated into one piece's spacing portion, the whole lower terminal surface diameter that is round platform form and spacing portion of spacing portion equals with the internal diameter of second annular groove in spacing portion, the mounting groove with spacing portion shape adaptation is seted up to the lower terminal surface of second valve gap, and after bellows base's round platform portion got into the mounting groove completely, bellows base cooperation first valve gap and second valve gap made the elastic component be in the pressurized state.

3. The bellows gate valve of claim 1, wherein: the elastic piece is a metal winding gasket.

4. The bellows gate valve of claim 1, wherein: the first valve cover and the second valve cover are connected through the screw rod piece, connecting holes for the screw rod piece to penetrate through are correspondingly formed in the first valve cover and the second valve cover, external threads are arranged at two end portions of the screw rod piece, and nuts are arranged at two ends of the screw rod piece respectively.

5. The bellows gate valve of claim 1, wherein: the packing box is arranged between the second valve cover and the valve rod, a packing gland is arranged on the packing box and extrudes a packing assembly in the packing box, and the packing assembly is formed by combining a plurality of layers of packing.

6. The bellows gate valve of claim 5, wherein: the packing assembly comprises a sealing ring compression ring, an aramid fiber packing, a spacer ring and a graphite packing which are sequentially arranged from bottom to top.

7. The bellows gate valve of claim 1, wherein: and a pressure gauge is arranged on one side of the second valve cover and communicated with the second mounting cavity.