CN2329814Y

CN2329814Y - Elastic valve seat wedge gate valve

Info

Publication number: CN2329814Y
Application number: CN 97247308
Authority: CN
Inventors: 林瑞义
Original assignee: Individual
Current assignee: Individual
Priority date: 1997-09-18
Filing date: 1997-09-18
Publication date: 1999-07-21
Anticipated expiration: 2007-09-18

Abstract

The utility model discloses a novel sanitary gate valve for drinking water. In the utility model, on the basis of an original gate valve, the inner and the outer surfaces of the gate valve back are provided with one layer of plastic, appearance can be beautiful, and the inner cavity can be sanitary and clean; meanwhile, surface of an iron core of a gate plate is provided with one layer nontoxic rubber, and an elastic soft sealing form can be formed; in addition, an O-shaped rubber sealing ring is adopted between the valve rod and a press cover, and a wedge type gate valve which has the advantages that the outer appearance is clean and beautiful, the cleanliness of the inner cavity can reach the national standard of direct drinking water, the sealing performance of the valve body, the gate plate, and the valve rod are reliable.

Description

The elastic seat Wedge gate valve

The utility model relates to a kind of health gate valve of potable water, specifically the sealing of gate valve valve seat valve rod and gate valve inner chamber and appearance is implemented improved elastic seat Wedge gate valve.

The gate valve closure structure of present industrial use is whole voussoir, get on the bus out or tumble in the antifriction metal (AFM) seat at valve body and flashboard, but do not have elasticity, and the technology capability of valve is poor, can not guarantee the interior sealing of gate valve, easily produces and leaks.The sealing of valve rod is to use filler, need adjust during use, and the Gland easy-rupturing causes the medium external leakage in the use, and inside screw non-rising stem type gate valve is not gone up sealing and can not be changed filler under line pressure.Valve body is by casting, inner chamber impurity content height, and accumulate impurity in the groove of intracavity bottom easily, the convection cell resistance is big.In sum, existing gate valve all can not reach requirement on the sealability He on the sanitary standard, so can not be used for the pipeline of the higher direct drinking water of water quality requirement.

The purpose of this utility model is to provide a kind of overall appearance attractive in appearance, and the inner chamber turbidity test reach national direct drinking water standard, the reliable new-type elastic seat Wedge gate valve of the sealability at valve body and valve rod place.

The purpose of this utility model is to realize like this.The elastic seat Wedge gate valve that constitutes by valve body, valve gap, valve rod, Stem Mut, flashboard and handwheel etc., it is characterized in that it being that the upper end of valve body is a valve gap, it between valve body and the valve gap ring-shaped rubber seal ring, the compound one deck of the inner and outer surface of valve body and valve gap is thin to be moulded: the upper end of valve gap is a gland, and the center of valve gap and gland is a valve rod; The center, joint of valve rod and gland is installed with nylon lining, is with the O RunddichtringO in the nylon village cover inner face circular groove; Valve gap top and valve rod contacting point are with the nylon thrust pad; The lower end of valve rod is with Stem Mut, and Stem Mut is with flashboard outward; Flashboard outer surface lining one deck rubber; The top of valve rod is a handwheel.The work of whole valve is finished by the rotation handwheel.When driving handwheel toward " opening " direction rotary valve rod, Stem Mut drives flashboard and move valve opening on valve rod; During toward " pass " direction rotary valve rod, Stem Mut drives flashboard and descends along valve rod, makes the sealing layer of flashboard and valve seal position produce relative deformation, realizes sealing.

The utility model is because adopt high pressure electrostatic painting non-toxic plastic powder on the inner and outer surface of valve body and valve gap, it is adhered on it, so it is attractive in appearance that appearance shows, inner chamber casting impurity is by topped the sanitation and hygiene that also seem, the utility model serves as a contrast the rubber of nontoxic elastic in appearance in flashboard iron core integral body simultaneously, make it not only wear-resistant but also corrosion-resistant, and sealing is reliable; Use cotton garment to add the O RunddichtringO in valve rod convex shoulder upper end in addition, play the valve stem seal effect, use the nylon thrust washer in valve rod convex shoulder lower end, can be under line pressure, change valve stem packing ring, play seal action, improved the performance of sealing widely, so the utility model can reach the purpose of drafting.

Concrete structure of the present utility model is provided by following embodiment and accompanying drawing thereof.

Fig. 1 is the utility model topology view.

By valve body (1), the upper end of valve body (1) is valve gap (6) among the figure, is ring-shaped rubber seal ring (5) between valve body (1) and the valve gap (6); Thin mould (12) of inside and outside compound one deck of valve body (1) and valve gap (6); The upper end of valve gap (6) is gland (9), and the center of valve gap (6) and gland (9) is valve rod (4); Valve rod (4) is installed with nylon lining (8) with the center, joint of gland (9), is with O RunddichtringO (13) in nylon lining (8) the inner face circular groove; Valve gap (6) top and valve rod (4) contacting point are with nylon thrust pad (7); The lower end of valve rod (4) is with Stem Mut (3), the outer flashboard (2) that is with of Stem Mut (3); Flashboard (2) outer surface is one deck rubber (11), and the top of valve rod (4) is handwheel (10).The work of whole valve is finished by rotation handwheel (10).When driving handwheel (10) toward " opening " direction rotary valve rod (4), Stem Mut (3) drives flashboard (2) and descends along valve rod (4), makes the sealing layer (11) of flashboard and valve body (1) sealing position produce relative deformation.Realize sealing.

Claims

1, a kind of elastic seat Wedge gate valve that constitutes by valve body (1), valve gap (6), valve rod (4), Stem Mut (3), flashboard (2) and handwheel (10) etc., it is characterized in that by valve body (1), the upper end of valve body (1) is valve gap (6), thin mould (12) of compound one deck of inner and outer surface of valve body (1) and valve gap (6); The upper end of valve gap (6) is gland (9). the center of valve gap (6) and gland (9) is valve rod (4); Valve rod (4) is installed with lining (8) with the center, joint of gland (9), is with seal ring (13) in lining (8) the inner face circular groove; Valve gap (6) top and valve rod (4) contacting point are with thrust pad (7); The lower end of valve rod (4) is with Stem Mut (3), and Stem Mut (3) is outer to be with flashboard (2), and flashboard (2) outer surface is one deck rubber (11); The top of valve rod (4) is handwheel (10).

2, elastic seat Wedge gate valve according to claim 1 is characterized in that lining (8) and thrust pad (7) are that nylon material is made.

3, elastic seat Wedge gate valve according to claim 1 is characterized in that its shape of seal ring (13) is the O type.