CN1632354A

CN1632354A - Gate valve

Info

Publication number: CN1632354A
Application number: CN 200310117869
Authority: CN
Inventors: 李昀
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-12-23
Filing date: 2003-12-23
Publication date: 2005-06-29

Abstract

The invention discloses a gate valve, comprising valve body, flashboard, connection shaft, handle, seal ring and pipe nozzle. The gate valve applies two elastic seal rings which fixed between the back terminal face of the pipe nozzle and front terminal face of the valve body to clamp the lower terminal face of the valve plate. Therefore, it can prevent the vibration and noise produced by impact of the valve plate fluid and has sealing function. Further, the valve is open and closed by pulling handle. The gate valve is light whose weight is 1/10 of the metal gate valve and is high corrosion resistant.

Description

Gate valve

Technical field

The present invention relates to a kind of gate valve, particularly relate to a kind of gate valve based on engineering plastics.

Background technique

Gate valve is a kind ofly to make open-shut device and move along valve seat axis normal direction with flashboard, to realize the valve of switching motion.It is mainly used in flowing of control fluid.Gate valve commonly used at present mainly is made up of valve body, valve plate, screw mandrel and handwheel, and an end of screw mandrel links to each other with the valve plate that is positioned at valve body, and the other end then joins with handwheel.The flow of regulated fluid is to utilize the mode of rotating handwheel that valve plate is moved up and down in the valve body cavity.But, because this gate valve is to be made by metallic material, thus install, transportation unusual difficulty all, and anti-corrosion capability is poor; Handwheel on it is very heavy in addition, so the speed of switch valve is slower, particularly it is very difficult with being connected of present widely used new type plastic pipe, and costs an arm and a leg.

Summary of the invention

In order to address the above problem, the object of the present invention is to provide a kind of in light weight, be easy to install and transportation, governing speed is fast, antiseptic property good and cheap gate valve.

In order to achieve the above object, gate valve provided by the invention is made up of valve body, flashboard, coupling shaft, handle, seal ring and adapter mouth; Flashboard is vertically set on the inside cavity of valve body; One end of coupling shaft links to each other with the upper end of flashboard, and the other end and handle join; Taking over mouth for two is installed in respectively on the front/rear end of valve body lower portion; Two O-ring seals then are clipped in respectively between the front-end face of two ear end faces of taking over mouthful and valve body.

Described O-ring seal be by can be clipped in the positioning ring taken between mouthful ear end face and the valve body front-end face and from the vertical bending of an end of positioning ring then the edge direction level opposite with positioning ring bend and the seal ring one that forms constitutes.

Be formed with a circle flange away from terminal outwards the giving prominence in the surface of positioning ring on the described seal ring.

Described valve body can be made with PVC or other plastics; Valve plate can be made with PP, nylon, PP and TPE composite material, corrosion resistant plate or sheet metal and PP composite material.

Gate valve provided by the invention is to utilize two to be fixed on the lower end surface that valve plate is clamped in the next front and back of the elastic seal ring of taking between mouthful ear end face and the valve body front-end face, not only can prevent from valve plate to be subjected to the impact of fluid like this and produce to vibrate and noise, but also have seal action.In addition, pull handle can open and close valve about only needing, thereby it is very convenient to operate.In addition, because the material that gate valve of the present invention is selected for use is plastics, stainless steel or rubber, so its weight only is 1/10 of metal gate valve, and corrosion resistance and good, thereby can reduce production costs significantly, and be easy to install and transportation.

Description of drawings

Below in conjunction with the drawings and specific embodiments gate valve of the present invention is elaborated.

Fig. 1 is a gate valve plan view of the present invention.

Fig. 2 is a gate valve longitudinal construction sectional view of the present invention.

Embodiment

As depicted in figs. 1 and 2, gate valve provided by the invention is made up of valve body 1, flashboard 3, coupling shaft 4, handle 5, seal ring 6 and adapter mouth 2; Flashboard 3 is vertically set on the inside cavity of valve body 1; One end of coupling shaft 4 links to each other with the upper end of flashboard 3, and the other end and handle 5 join; Taking over mouth 2 for two is installed in respectively on the front/rear end of valve body 1 bottom; Two O-ring seals 6 then are clipped in two respectively and take between the front-end face of mouthfuls 2 ear end face and valve body 1.Described O-ring seal 6 be by can be clipped in the positioning ring 7 taken between mouthful 2 ear end faces and valve body 1 front-end face and from the vertical bending of an end of positioning ring 7 then edge and positioning ring 7 opposite direction levels bend and seal ring 8 one that form constitute.Be formed with a circle flange 9 away from terminal outwards the giving prominence in the surface of positioning ring 7 on the seal ring 8.This special structure can play seal action, can guarantee that again switch valve is light, thereby prolong the working life of valve greatly.In addition, valve body 1 can be made with PVC or other plastics; Valve plate 3 can be made with PP, nylon, PP and TPE composite material, corrosion resistant plate or sheet metal and PP composite material.Taking over the material of mouth 2 can select according to the material of connection pipe fitting, is convenient to bonding or welding between the two like this.Gate valve provided by the invention can be widely used in sea-farming, freshwater aquiculture, agricultural irrigation, water treatment and various water conservancy project journey.

Claims

1, a kind of gate valve is characterized in that: described gate valve is made up of valve body (1), flashboard (3), coupling shaft (4), handle (5), seal ring (6) and adapter mouthful (2); Flashboard (3) is vertically set on the inside cavity of valve body (1); One end of coupling shaft (4) links to each other with the upper end of flashboard (3), and the other end and handle (5) join; Taking over mouthful (2) for two is installed in respectively on the front/rear end of valve body (1) bottom; Two O-ring seals (6) then are clipped in two respectively and take between the front-end face of the ear end face of mouthful (2) and valve body (1).

2, gate valve according to claim 1 is characterized in that: described O-ring seal (6) is by being clipped in the positioning ring (7) taken between mouthful (2) ear end face and valve body (1) front-end face and then bending and seal ring (8) the one formation that forms along the direction level opposite with positioning ring (7) from the vertical bending of an end of positioning ring (7).

3, gate valve according to claim 2 is characterized in that: described seal ring (8) is gone up away from the terminal outwards outstanding circle flange (9) that is formed with in the surface of positioning ring (7).

4, gate valve according to claim 1 is characterized in that: the available PVC of described valve body (1) or other plastics are made; The available PP of valve plate (3), nylon, PP and TPE composite material, corrosion resistant plate or sheet metal and PP composite material are made.