CN211550596U - Wear-resistant zero-leakage gate valve - Google Patents
Wear-resistant zero-leakage gate valve Download PDFInfo
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- CN211550596U CN211550596U CN201921728454.5U CN201921728454U CN211550596U CN 211550596 U CN211550596 U CN 211550596U CN 201921728454 U CN201921728454 U CN 201921728454U CN 211550596 U CN211550596 U CN 211550596U
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- valve
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- flexible disk
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Abstract
The utility model relates to a wear-resistant zero-leakage gate valve, which comprises a valve body, a flashboard, a valve rod, a valve cover and a hand wheel; the valve is characterized in that a diaphragm sealing device is arranged in a middle cavity of the valve body, the diaphragm sealing device comprises a flexible disk diaphragm, a radial outer circular plane of the flexible disk diaphragm is sealed and pressed between the lower end face of the valve cover and the upper end face of the middle cavity of the valve body, and the center of the flexible disk diaphragm is sealed and fixed on a radial step at the lower end of the valve rod by a compression nut; a shaft sleeve is arranged between the valve rod and the valve cover and is movably arranged in an installation cavity at the upper part of the valve cover through a gland. The problem of leakage caused by abrasion of cavity filler in the prior art is avoided, and the sealing performance is reliable. The sealing device is suitable for being used under the working conditions of toxic, harmful and dangerous media with high sealing requirements.
Description
Technical Field
The utility model belongs to the valve field, in particular to wedge gate valve. The utility model is suitable for an wearability, poisonous, harmful, dangerous medium operating mode.
Background
The wedge gate valve generally comprises a valve body, a gate plate, a valve rod, a valve cover and a transmission device, sealing surfaces on two sides of the gate plate form a V-shaped structure, a V-shaped valve seat matched with the sealing surface of the gate plate is arranged in an inner cavity of the valve body, the lower end of the valve rod is fixedly connected with the upper end of the gate plate, the upper end of the valve rod penetrates through the valve cover to be connected with the transmission device, and the valve rod; the disadvantages are that: in the opening and closing process, abrasion is generated between the valve rod and the packing, the valve rod and the packing are opened and closed repeatedly often, leakage is easy to occur between the valve rod and the packing, the sealing performance of the cavity is poor, and the valve is not suitable for being used under the medium working condition with high sealing requirement.
Disclosure of Invention
The utility model discloses shortcoming to prior art exists provides a wear-resisting zero leakage gate valve that lumen sealing performance is reliable.
The technical scheme of the utility model comprises a valve body, a flashboard, a valve rod, a valve cover and a hand wheel, wherein sealing surfaces on two sides of the flashboard form a V-shaped structure, a V-shaped valve seat matched with the sealing surface of the flashboard is arranged in an inner cavity of the valve body, the lower end of the valve rod is fixedly connected with the upper end of the flashboard, and the upper end of the valve rod passes through the valve cover to be; the valve is characterized in that a diaphragm sealing device is arranged in a middle cavity of the valve body, the diaphragm sealing device comprises a flexible disk diaphragm, a radial outer circular plane of the flexible disk diaphragm is sealed and pressed between the lower end face of the valve cover and the upper end face of the middle cavity of the valve body, and the center of the flexible disk diaphragm is sealed and fixed on a radial step at the lower end of the valve rod by a compression nut; a shaft sleeve is arranged between the valve rod and the valve cover and is movably arranged in an installation cavity at the upper part of the valve cover through a gland.
In the technical scheme, a spiral boss is arranged in the center of the valve cavity below the valve seat.
Compared with the prior art, the utility model beneficial effect be that the valve body lumen adopts the diaphragm sealed, has avoided prior art lumen filler wearing and tearing to take place the leakage problem, and its sealing performance is reliable.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Detailed Description
The wear-resistant zero-leakage gate valve shown in fig. 1 comprises a valve body 1, a gate plate 2, a valve rod 3, a valve cover 7 and a hand wheel 12, wherein the valve cover 7 is installed on the upper end surface of a middle cavity of the valve body 1 through a bolt 4 and a nut 5, sealing surfaces on two sides of the gate plate 2 form a V-shaped structure, a V-shaped valve seat matched with the sealing surface of the gate plate 2 is arranged in an inner cavity of the valve body 1, the lower end of the valve rod 3 is fixedly connected with the upper end of the gate plate 2, and the; the valve is characterized in that a diaphragm sealing device is arranged in a middle cavity of a valve body 1, the diaphragm sealing device comprises a flexible disk diaphragm 6, a circular plane on the radial outer side of the flexible disk diaphragm 6 is sealed and pressed between the lower end surface of a valve cover 7 and the upper end surface of the middle cavity of the valve body 1, the center of the flexible disk diaphragm 6 is sealed and fixed on a radial step at the lower end of a valve rod 3 by a compression nut, and the flexible disk diaphragm 6 is made of elastic, tough, flexible and stretchable materials; set up axle sleeve 8 between valve rod 3 middle part and valve gap 7, this axle sleeve 8 is by gland 9 fixed mounting in the installation cavity on valve gap 7 upper portion, increases valve rod 3 support stability, reduces valve rod 3 lift removal frictional force.
A spiral boss is arranged in the center of the valve cavity below the valve seat, and impurities at the bottom of the valve cavity are washed out by utilizing vortex generated by a medium when the flashboard 2 is closed.
The upper end of the valve rod 3 is in threaded connection with a valve rod nut 10, the valve rod nut 10 is installed on an installation frame at the upper end of the valve cover 7 through a nut gland 11, and a hand wheel 12 is fixedly installed on the valve rod nut 10 through a locking nut 13.
Claims (2)
1. A wear-resistant zero-leakage gate valve comprises a valve body (1), a gate plate (2), a valve rod (3), a valve cover (7) and a hand wheel (12), wherein sealing surfaces on two sides of the gate plate (2) form a V-shaped structure, a V-shaped valve seat matched with the sealing surface of the gate plate (2) is arranged in an inner cavity of the valve body (1), the lower end of the valve rod (3) is fixedly connected with the upper end of the gate plate (2), and the upper end of the valve rod (3) penetrates through the valve cover (7) to be connected with the; the valve is characterized in that a diaphragm sealing device is arranged in a middle cavity of the valve body (1), the diaphragm sealing device comprises a flexible disk diaphragm (6), a circular plane on the radial outer side of the flexible disk diaphragm (6) is hermetically pressed between the lower end face of the valve cover (7) and the upper end face of the middle cavity of the valve body (1), and the center of the flexible disk diaphragm (6) is hermetically fixed on a radial step at the lower end of the valve rod (3) by a compression nut; a shaft sleeve (8) is arranged between the middle part of the valve rod (3) and the valve cover (7), and the shaft sleeve (8) is fixedly arranged in a mounting cavity at the upper part of the valve cover (7) through a gland (9).
2. A wear resistant zero leakage gate valve according to claim 1 wherein a spiral boss is provided centrally of the valve chamber below the valve seat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921728454.5U CN211550596U (en) | 2019-10-16 | 2019-10-16 | Wear-resistant zero-leakage gate valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921728454.5U CN211550596U (en) | 2019-10-16 | 2019-10-16 | Wear-resistant zero-leakage gate valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211550596U true CN211550596U (en) | 2020-09-22 |
Family
ID=72498831
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921728454.5U Active CN211550596U (en) | 2019-10-16 | 2019-10-16 | Wear-resistant zero-leakage gate valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211550596U (en) |
-
2019
- 2019-10-16 CN CN201921728454.5U patent/CN211550596U/en active Active
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