CN2156357Y

CN2156357Y - Gate plate valve without leakage

Info

Publication number: CN2156357Y
Application number: CN 93203217
Authority: CN
Inventors: 方友金
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-02-11
Filing date: 1993-02-11
Publication date: 1994-02-16
Anticipated expiration: 2003-02-11

Abstract

The utility model relates to a gate plate valve without outer leakage, which belongs to the valve with a ring sealing axle of rubber material between an axle and an outer shell. The structure adopts a corrugated sealing sleeve as a leakage prevention layer to be sheathed on a valve rod and placed in the hollow cavity of a valve body used for opening and placing a gate plate. The upper end of the corrugated sealing sleeve is connectively pressed on the connective portion of a valve cover and a valve body and the lower end is tightly fixed on the upper end of the gate plate. The sealing sleeve conducts reciprocating movement with the upper and the lower opening and closing of the gate plate to prevent the outer leakage of water, oil, gas and other medium. The utility model has simple structure, good sealing performance and high reliability and is suitable for the gate plate valve and the throttling valve.

Description

Gate plate valve without leakage

A kind of gate valve that is used for the anti-external leakage of Liquid valve belongs to the shaft sealing valve that has the rubber material ring between axle and shell at least.

Valves such as the present gate valve that uses, throttle valve, the valve packing leakage problem often appears, for addressing this problem, the gate valve of improvement leakage-proof structure patent is arranged, the patent No. is 88218154,8, this architecture advances valve rod, valve cover structure all adopt multi-layer sealed mechanism to reach no external leakage purpose at valve gap top and valve rod top.This structure is complicated, poor reliability, and the manufacturing process complexity needs debugging in advance during use.At the defective that said structure exists, the purpose of this utility model provides a kind of no external leakage gate valve of simple in structure, easy to use, good airproof performance.

The utility model is to adopt the anti-layer of letting out of ripple sealing interplanting to be set on the valve rod, and place in the cavity of valve body breakdown stop and start flashboard, its upper end-face edge is crimped on the joint of valve gap and valve body, the lower end is crimped on the upper end of flashboard, stuffing box gland prevents the external leakage of media such as water, oil, gas along with the switching up and down of flashboard is reciprocating.This is simple in structure, and good airproof performance is applicable to various gate valves and throttle valve.

Concrete structure of the present utility model is enumeration in conjunction with the following drawings:

Fig. 1, the structural drawing of no external leakage gate valve.

The utility model is by handwheel 1 as seen from the figure, valve rod 2, valve gap 3, valve body 5, flashboard 10 compositions such as grade, valve body 5 upper ends are provided with the internal thread concave station 6 of supporting valve gap 3, flashboard 10 upper ends are provided with outside thread boss 8, anti-cover 7 of letting out of valve rod 2 upper sleeve throughs, should anti-let out cover 7 is located at breakdown and parks in the cavity of flashboard 10, its upper end-face edge is located on the concave station 6 of valve body 5, fastening by valve gap 3 spinning, its lower edge is located on the boss 8 of flashboard 10 fastening by guard bar nut 9, make the anti-cover 7 of letting out can to-and-fro motion along with the unlatching up and down of flashboard 10, liquid, gas medium can only flow at anti-cover 7 skins of letting out, and has promptly avoided the external leakage phenomenon.For making structural reliability good, 2 positioning section places are provided with round boss 11 at valve rod, and valve gap 3 inner tops are provided with concave station, and the boss of valve rod 2 is assemblied in the concave station in the valve gap 3, screws by guard bar nut 4, and

guard bar nut

4 and 9 is nested the guard bar effect of playing is set simultaneously.

Most preferred embodiment of the present utility model as mentioned above.

Claims

1, a kind of no external leakage gate valve, form by handwheel 1, valve rod 2, valve gap 3, valve body 5, flashboard 10, it is characterized in that, valve body 5 upper ends are provided with the internal thread concave station 6 of supporting valve gap, and flashboard 10 upper ends are provided with outside thread boss 8, and valve rod 2 upper sleeve throughs have the anti-cover 7 of letting out, and be located at breakdown and park in the cavity of flashboard 10, the anti-upper end-face edge of letting out cover 7 is located on the concave station 6 of valve body 5, and is fastening by valve gap 3 spinning, and its lower edge is located on the boss 8 of flashboard 10 fastening by guard bar nut 9.

2, no external leakage gate valve according to claim 1 is characterized in that, the positioning section of valve rod 2 is provided with round boss 11, and valve gap 3 inner tops are provided with concave station, and the boss of valve rod 2 is assemblied in the concave station in the valve gap 3, screws by guard bar nut 4.