CN201715004U

CN201715004U - High anti-corrosive flat gate-valve

Info

Publication number: CN201715004U
Application number: CN2010201141748U
Authority: CN
Inventors: 张文勇; 罗文友
Original assignee: Chengdu Holy Valve & Complete Equipment Co Ltd
Current assignee: Chengdu Holy Valve & Complete Equipment Co Ltd
Priority date: 2010-02-20
Filing date: 2010-02-20
Publication date: 2011-01-19
Anticipated expiration: 2020-02-20

Abstract

The utility model discloses a high anti-corrosive flat gate-valve, which belongs to the field of valve technology. The high anti-corrosive flat gate-valve comprises a valve cover, a grease injecting machine, a valve body, a sealing ring, a channel, a valve seat, a gate plate, and a valve cavity; a sealing plate extending downwards is arranged at the lower end of the valve seat. The high anti-corrosive flat gate-valve can prevent corrodent from entering the middle cavity of the valve, reduces the corroding speed for the valve cavity, extends the service life for the valve, prevents impurities in the medium from depositing in the valve cavity, avoids machine fault caused by deposited impurities, ensures long-period reliable work of the valve, and is suitable for transmitting high corrosive medium in chemical, metallurgy, and petroleum industries.

Description

High anticorrosion plate valve

Affiliated technical field

The utility model relates to a kind of anticorrosion valve, and especially high anticorrosion plate valve belongs to valve technology field.

Background technique

At present, the ordinary flat gate valve is when in the valve opening during in half-open position, has formed a passage between the passage of flashboard, the passage of valve body and the valve pocket, and aggressive medium enters valve pocket, valve pocket is produced corrosive action, shown in Fig. 2,3,4.Because valve pocket is the pressure-bearing boundary of valve, the corrosion of wall thickness can cause blast and medium to leak, cause environmental pollution and security incident, so aggressive medium with valve when the selection otherwise integral body select corrosion-resistant material for use, just select the local built-up welding corrosion resistant material of common material for use, and the manufacture cost of two kinds of schemes is all higher at the valve contact medium.

The model utility content

For the corrosion-prone deficiency of the valve cavity wall that overcomes existing plate valve, the utility model provides a kind of Flat Sluice valve that is used for the highly corrosive medium.

The technological scheme that its technical problem that solves the utility model adopts is: high anticorrosion plate valve, and it comprises valve gap, grease injection device, valve body, seal ring, passage, valve seat, flashboard, valve pocket, the valve seat lower end is provided with the sealing plate of downward extension.

The beneficial effects of the utility model are, can prevent that aggressive medium from entering the valve lumen, reduce the rate of corrosion to valve pocket, prolong valve working life, simultaneously, can prevent the precipitation of impurity in valve pocket in the medium, avoid the mechanical failure that causes thus, guarantee working reliably and with long-term of valve.

Description of drawings

Fig. 1 is an overall construction drawing of the present utility model;

Fig. 2 is the valve opening state schematic representation of prior art;

Fig. 3 is the valve half-open position schematic representation of prior art;

Fig. 4 is the valve closing view of prior art;

Fig. 5 is a valve opening state working state schematic representation of the present utility model;

Fig. 6 is a valve half-open position working state schematic representation of the present utility model;

Fig. 7 is a valve closing state working state schematic representation of the present utility model.

Component and numbering among the figure:

The 1-valve gap; The 2-grease injection device; The 3-valve body; The 4-seal ring; The 5-passage; The 6-sealing plate;

The 7-flashboard; The 8-valve pocket; The 9-valve seat.

Embodiment

Below in conjunction with drawings and Examples the utility model is further specified.

High anticorrosion plate valve, it comprises valve gap 1, grease injection device 2, valve body 3, seal ring 4, passage 5, valve seat 9, flashboard 7, valve pocket 8, valve seat 9 lower ends are provided with the sealing plate 6 of downward extension.

State during work is shown in Fig. 1,5,6,7, on the valve seat 9 of plate valve, designed the sealing plate 6 of band lengthening, valve seat 9 and sealing plate 6 are the anticorrosion alloy material, can any position in the flashboard 7 whole strokes be sealed, when flashboard 7 half-open positions, sealed obstruct between the passage 5 of flashboard 7 and the valve pocket 8; When flashboard 7 closed conditions, the sealed obstruct of medium that retains in the passage 5 of flashboard 7 can not enter into valve pocket 8, and passage 5 wherein is built-up welding anticorrosion alloy material.

The passage 5 equal built-up welding of valve body 3, valve seat 9, flashboard 7 one deck anticorrosive material, the sealing plate 6 of band lengthening also built-up welding one deck anticorrosive material.

Fig. 2,3, the 4th, Fig. 5,6,7 contrast schematic representation.

Installing grease injection device 2 on the valve gap 1, grease injection device 2 can inject full-bodied packing grease in valve pocket 8, prevent that further aggressive medium from entering the valve seat 9 of band sealing plate 6 and the seal clearance between the flashboard 7 enters valve pocket 8.On the valve seat 9 of band sealing plate 6 seal ring 4 is arranged, to sealing between passage 5 and the valve pocket 8.Also guarantee simultaneously not inlet passage 5 of valve pocket 8 interior packing greases.

Claims

1. one kind high anticorrosion plate valve comprises valve gap (1), grease injection device (2), valve body (3), seal ring (4), passage (5), valve seat (9), flashboard (7), valve pocket (8), it is characterized in that, valve seat (9) lower end is provided with the sealing plate (6) of downward extension.

2. the anticorrosion plate valve of height according to claim 1 is characterized in that, described valve seat (9) and sealing plate (6) are the anticorrosion alloy material.

3. the anticorrosion plate valve of height according to claim 1 is characterized in that described passage (5) is a built-up welding anticorrosion alloy material.