CN2245694Y

CN2245694Y - Gate valve

Info

Publication number: CN2245694Y
Application number: CN 96202720
Authority: CN
Inventors: 赵鑫发
Original assignee: Individual
Current assignee: Individual
Priority date: 1996-01-23
Filing date: 1996-01-23
Publication date: 1997-01-22
Anticipated expiration: 2006-01-23

Abstract

The utility model relates to a gate valve whose inner part is provided with a lifting and pressing rod. One end where the lifting and pressing rod is positioned in the valve body is connected with a thread sleeve whose inner part is provided with a threaded rod to engage the thread sleeve, a gate board which is made of elastic material with two forward extended and inward cambered river closure surfaces is connected to the threaded rod, and the inner wall of the valve body is coated with a resin lining layer. The gate valve has simple structure and low cost, applicable to corrosive fluids.

Description

A kind of gate valve

The utility model relates to the gate valve with flat sealing surface.

A kind of gate valve of the prior art, the lock body is made by metallic material, is involutory between the metal covering when damming, and sealing effect is relatively poor.Other has a kind of gate valve that coats elastic material in the metal to-metal brake surface, and its structure relative complex is a little, and the fabricating cost of lock body is also higher.

The purpose of this utility model is to provide a kind of good sealing effect, simply constructed gate valve.

A kind of gate valve of the utility model, the fluid passage inwall of valve body is established boss, offer flashboard slot on the boss, install flashboard in the flashboard slot, be equipped with the overhanging pressure-raising bar of an end in the valve body, the seal ring that the residing valve body passage port of this pressure-raising bar is established blind nut and roof pressure thereof is embraced and is placed in the pressure-raising bar, its special way is that the pressure-raising bar is in interior being with externally threaded screw rod to be meshed and installing of being put of tapped swivel nut that the end in the valve body connect and valve body, and this screw rod is associated with the protract flashboard of introversion of two-section stream interface that rubber-like elastic material makes with respect to the other end of meeting swivel nut one end.

Be covered with a lining at said valve interior wall and close layer, this gate valve is applicable to corrosive fluid.

The overhanging end of said pressure-raising bar is established and is revolved handle.

Said pressure-raising bar said blind nut and revolve between part embrace and be with packing ring.

A kind of gate valve of the utility model, because flashboard integral body is made by elastic material, so good airproof performance, the simple structure of flashboard own is changed conveniently, and the tool corrosion resistance; Its flashboard first line of a couplet screw rod of this gate valve, screw engages be in the swivel nut of pressure-raising bar the inner, and pressure-raising bar and swivel nut are twisted in the lump and driven the flashboard lifting and open and close simple structure; Its valve interior wall of this gate valve paste the lining close layer after, just have decay resistance, applicable to corrosive fluid.

The technical solution of the utility model is described further in conjunction with respective drawings with embodiment below.

Fig. 1. a kind of gate valve sectional view;

Fig. 2. inwall pastes the valve body schematic representation that lining closes layer.

A kind of gate valve of the utility model, fluid passage 9 inwalls of valve body 6 are established boss, offer flashboard slot on the boss, install two-section stream interface that oil resistant rubber makes protract introversion and the rectangular flashboard 8 of the face that dams in the flashboard slot, be equipped with the overhanging pressure-raising bar 5 of an end in the valve body 6, the seal ring that pressure-raising bar 5 residing valve body passage ports are established blind nut 3 and roof pressure thereof is placed in pressure-raising bar 5 for 4 armfuls, pressure-raising bar 5 is in the end in the valve body, be linked with tapped swivel nut, be with externally threaded screw rod 7 to be meshed and an end is positioned at swivel nut with said swivel nut, the other end of screw rod 7 is connect by bolt and said flashboard 8, the overhanging end of pressure-raising bar is provided with and revolves 1, pressure-raising bar 5 revolve 1 and blind nut 3 between part embrace and be with packing ring 2.

Its swivel nut of this gate valve be same as the pressure-raising bar by about when twisting, screw rod 7 is made switching motion together with flashboard 8 one liftings.

Another embodiment of the utility model is that valve body 6 inwalls are covered with ABS lining and close layer 10.Other structures are identical with last example.This gate valve is applicable to corrosive fluid.The lining of this gate valve valve interior wall closes layer and is achieved in that with valve body and makes external mold, is same as and volume is made internal mold less than the inner core of valve pocket with shape, inject the ABS melt in the gap of inside and outside mould, removes internal mold after the cooling.

The another embodiment of the utility model is that a kind of lining that valve body 6 inwalls are covered with PVC, CPVC, PVDC, PBT, PCTFE closes layer.Other structures are identical with the first two example.

Claims

1, a kind of gate valve, fluid passage (9) inwall of valve body (6) is established boss, offer flashboard slot on the boss, install flashboard (8) in the flashboard slot, be equipped with the overhanging pressure-raising bar (5) of an end in the valve body (6), the seal ring (4) that the residing valve body passage port of pressure-raising bar (5) is established blind nut (3) and roof pressure thereof is embraced and to be placed in pressure-raising bar (5), it is characterized in that, the client link that pressure-raising bar (5) is in the valve body has tapped swivel nut, be with externally threaded screw rod (7) to be meshed with said swivel nut and be provided with, screw rod (7) is associated with the protract flashboard (8) of introversion of two-section stream interface that rubber-like elastic material makes with respect to the other end of meeting swivel nut one end.

2, a kind of gate valve as claimed in claim 1 is characterized in that, valve body (6) inwall is covered with lining and closes layer (10).

3, a kind of gate valve as claimed in claim 1 or 2 is characterized in that, the overhanging end of pressure-raising bar (5) is established and revolved (1).

4, a kind of gate valve as claimed in claim 3 is characterized in that, pressure-raising bar (5) is at blind nut (3) and revolve the part between (1) embraced and be with packing ring (2).

5, a kind of gate valve as claimed in claim 2 is characterized in that, lining closes a kind of for ABS, PVC, CPVC, PVDC, PBT, PCTFE of layer (10).

6, a kind of gate valve as claimed in claim 1 or 2 is characterized in that, flashboard (8) connects mutually with the bolt and the screw rod of connection in flashboard longitudinal center through hole of screw rod (7).