CN201434099Y

CN201434099Y - Flat gate valve

Info

Publication number: CN201434099Y
Application number: CN2009201191848U
Authority: CN
Inventors: 卓曙光; 李建忠; 叶展磊
Original assignee: ZHEJIANG OUSITE VAVLE CO Ltd
Current assignee: ZHEJIANG OUSITE VAVLE CO Ltd
Priority date: 2009-05-06
Filing date: 2009-05-06
Publication date: 2010-03-31
Anticipated expiration: 2019-05-06

Abstract

The utility model relates to a flat gate valve, which comprises a valve body, a valve seat, a valve stem, a gate disc, a valve cover and an operating mechanism, wherein the valve seat is arranged in the valve body; the gate disc is closely attached to and matched with the valve seat; one end of the valve stem is connected with the gate disc, and the other end is connected with the operating mechanism; and the valve cover is fixedly connected with the valve body. The flat gate valve is characterized in that a bellows is arranged on the inner wall of a valve body channel; one end of the bellowsis fixedly connected with the valve body, and the other end is fixedly connected with the valve seat; and the valve seat is closely attached to and matched with the gate disc under the elastic drive of the bellows. The flat gate valve has the benefits that as one group of bellows are arranged on the inner wall of the valve body channel and the stable elasticity of the bellows reinforces the adhesive force between the valve seat and the valve body, the sealing reliability is reinforced; and the high-temperature resistance performance and the sealing performance of the flat gate valve can be effectively improved by adopting the structure.

Description

Plate valve

Technical field

The utility model relates to a kind of valve, relates to a kind of plate valve in particular, is mainly used in the pipe-line system engineering.

Background technique

Existing plate valve includes valve body, valve seat, and valve rod, flashboard, valve gap and driving mechanism, described valve seat places in the valve body, and described flashboard one end is connected with an end of valve rod, and the described valve rod the other end links to each other with operating device; For guaranteeing the sealability of valve when closing, in described valve body, be provided with the rubber o-ring that many groups cooperate with the valve seat roof pressure; When flashboard cut out, valve seat was under the radial effect of O type circle, and the working surface of its working surface and flashboard is snug fit mutually; Adopt this structure, though can strengthen the sealability of plate valve to a certain extent, but any rubber (silicone rubber, fluorine rubber or nitrile rubber, natural rubber etc.) does not have resistance to high temperature, when the temperature in the valve passage reaches more than 250 ℃, O type circle can produce seal failure under the situation of high temperature, thereby causes valve leakage phenomenon to occur.

Summary of the invention

Valve seat and flashboard can produce technical problems such as leakage because of the seal failure of O type circle in order to solve at high temperature, the utility model provides a kind of plate valve, it is rational in infrastructure, and the sealing surface that can effectively solve valve seat and flashboard produces technical problems such as leakage in the part.

For solving above technical problem, the technological scheme that the utility model is taked is a kind of plate valve, and it includes valve body, valve seat, valve rod, flashboard, valve gap and operating device, described valve seat places in the valve body, described flashboard and valve seat be snug fit mutually, described valve rod one end is connected with flashboard, and its other end links to each other with operating device, and described valve gap and valve body are fixedly connected; The inwall of described valve channel is provided with a bellows, and this bellows one end is fixedlyed connected with valve body, and its other end and valve seat are fixedly connected, and described valve seat orders about down and flashboard snug fit mutually at the elastic force of bellows.

Further, also be provided with a location steel pipe and a guide thimble in the described valve channel, described positioning steel tube external diameter is identical with the valve channel internal diameter, and the one end is fixedlyed connected with guide thimble, and the other end is fixed on the valve channel mouth; Described bellows is nested with on the external diameter of guide thimble.Further, described positioning steel tube internal diameter is identical with the guide thimble internal diameter.

The beneficial effects of the utility model are that one group of bellows is installed on the vias inner walls of valve body and since the stable elastic reinforcement of bellows valve seat and valve body adhesion, strengthened the reliability that seals; Adopt this structure, can effectively improve the resistance to high temperature and the sealability of plate valve.

Description of drawings

Fig. 1 is the broken section structural drawing of the utility model embodiment plate valve

Fig. 2 is a P place enlarged view among Fig. 1

Specific embodiments

Below in conjunction with accompanying drawing the utility model mode of execution is described further:

Extremely shown in Figure 2 as Fig. 1, a kind of plate valve of the utility model, it includes valve body 1, valve seat 2, valve rod 3, flashboard 4, valve gap 5 and operating device 6, described valve seat 2 places in the valve body 1, described flashboard 4 and valve seat 2 be snug fit mutually, described valve rod 3 one ends are connected with flashboard 4, and its other end links to each other with operating device 6, and described valve gap 5 is fixedly connected with valve body 1; In order to solve under high-temperature condition, because the seal failure of O type circle causes valve leakage phenomenon to occur, on the inwall of described valve body 1 passage, be provided with a bellows 7, these bellows 7 one ends are fixedlyed connected with valve body 1, and its other end and valve seat 2 are fixedly connected; Described valve seat 2 orders about down and flashboard 4 snug fit mutually at the elastic force of bellows 7; Change O type circle into bellows 7,, thereby strengthened the adhesion of valve seat 2, improved the reliability of sealing with flashboard 4 because bellows 7 has stable elasticity; Adopt this structure, can effectively solve O type circle and under high-temperature condition, produce leakage phenomenon.

In the present embodiment, for making things convenient for the installation of bellows 7, also be provided with a location steel pipe 11 and a guide thimble 12 in described valve body 1 passage, described positioning steel tube 11 external diameters are identical with valve body 1 passage internal diameter, the one end is fixedlyed connected with guide thimble 12, and the other end is fixed on valve body 1 passway; Described bellows 7 is nested with on the external diameter of guide thimble 12; Adopt this structure, in convenient the installation, also can play the effect that protection bellows 7 is avoided the fed sheet of a media corrosion; Certainly, also can not set a steel pipe 11 and guide thimble 12, such as directly bellows 7 is nested with on the vias inner walls of valve body 1, can reach identical purpose equally, but owing to directly be nested with on the vias inner walls of valve body 1, be unfavorable for the installation of bellows 7, therefore, the mode of execution of present embodiment is preferential mode of execution.

In the present embodiment, in order to maximize the flow sectional area that guarantees valve body 1 passage, described guide thimble 12 internal diameters are identical with positioning steel tube 11 internal diameters; Certainly, guide thimble 12 internal diameters also can be less than the internal diameter of positioning steel tube 11, but owing to can dwindle the flow sectional area of valve body 1 passage relatively less than the internal diameter of positioning steel tube 11, therefore, the mode of execution in the present embodiment is preferential mode of execution.

In the present embodiment, described operating device 6 is manual, electronic, pneumatic and hydraulic pressure, specifically takes which kind of mode, can set according to the application demand of reality.

The foregoing description should not be considered as restriction of the present utility model, but any improvement of doing based on spirit of the present utility model, all should be within protection domain of the present utility model.

Claims

1. plate valve, it includes valve body, valve seat, valve rod, flashboard, valve gap and behaviour mechanism, described valve seat places in the valve body, and described flashboard and valve seat be snug fit mutually, and described valve rod one end is connected with flashboard, its the other end links to each other with operating device, and described valve gap and valve body are fixedly connected; The inwall that it is characterized in that described valve channel is provided with a bellows, and this bellows one end is fixedlyed connected with valve body, and its other end and valve seat are fixedly connected, and described valve seat orders about down and flashboard snug fit mutually at the elastic force of bellows.

2. a kind of plate valve according to claim 1, it is characterized in that also being provided with in the described valve channel location steel pipe and a guide thimble, described positioning steel tube external diameter is identical with the valve channel internal diameter, and the one end is fixedlyed connected with guide thimble, and the other end is fixed on the valve channel mouth; Described bellows is nested with on the external diameter of guide thimble.

3. a kind of plate valve according to claim 2 is characterized in that described positioning steel tube internal diameter is identical with the guide thimble internal diameter.