CN202629104U

CN202629104U - High-temperature seal butterfly valve

Info

Publication number: CN202629104U
Application number: CN 201220254780
Authority: CN
Inventors: 郑广安; 靳永明
Original assignee: WUXI BONIU CONTROL VALVE CO Ltd
Current assignee: WUXI BONIU CONTROL VALVE CO Ltd
Priority date: 2012-05-31
Filing date: 2012-05-31
Publication date: 2012-12-26
Anticipated expiration: 2022-05-31

Abstract

The utility model relates to a high-temperature seal butterfly valve which comprises a valve body. A valve seat is arranged in an inner cavity of the valve body, a valve plate is matched with the inside of the valve seat in sealed mode, the valve plate is connected with the valve body through a valve rod, and the valve rod is arranged in the valve body through a bearing. The high-temperature seal butterfly valve is characterized in that two ends of the valve rod are provided with elastic stop collars in sleeved mode, and the elastic stop collars are located between the valve plate and the valve body. The elastic stop collars are shaped like circular rings, and side walls of the elastic stop collars are shaped like straight lines or waves. According to the high-temperature seal butterfly valve, a sealing effect on the condition of high temperature can be guaranteed, and the valve plate can not be completely blocked.

Description

The elevated-temperature seal butterfly valve

Technical field

The utility model relates to a kind of butterfly valve, and especially a kind of have an elevated-temperature seal butterfly valve that position-limiting action can prevent that valve plate is stuck.

Background technique

A kind of modulating valve simple in structure of butterfly valve can be used for the switch control of low pressure pipeline medium.Butterfly valve is applicable in the engineering systems such as producer, coal gas, rock gas, LPG, town gas, cold and hot air, chemical industry smelting and generation environment-friendly and carries on the pipeline of various corrosivity, non-corrosive fluids medium, is used to regulate and block flowing of medium.

In the existing market, the high temperature butterfly valve ubiquity a lot of problems, is failure to actuate etc. as blocking at condition of high temperature lower valve plate; Poor sealing causes leakage rate to be difficult to control.

Summary of the invention

The purpose of the utility model is to overcome the deficiency that exists in the existing technology, and a kind of elevated-temperature seal butterfly valve is provided, can be not stuck at condition of high temperature lower valve plate, and can guarantee sealing effect.

According to the technological scheme that the utility model provides, said elevated-temperature seal butterfly valve comprises valve body, at the inner chamber of said valve body valve seat is set, and the inner sealing of valve seat cooperates valve plate, and valve plate is connected with valve body through valve rod, and valve rod is arranged in the valve body through bearing; Characteristic is: the sheathed elasticity limited ring at the two ends of said valve rod, this elasticity limited ring is between valve plate and valve body.

Said elasticity limited ring is circular, and the sidewall of this elasticity limited ring is shape or waveform linearly.

The described elevated-temperature seal butterfly valve of the utility model can guarantee the sealing effect under the condition of high temperature, and valve plate can be not stuck.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Fig. 2 is the structural representation of the described elasticity limited ring of the utility model.

Embodiment

Below in conjunction with concrete accompanying drawing the utility model is described further.

Like Fig. 1 ~ shown in Figure 2: elevated-temperature seal butterfly valve body 1, valve seat 2, valve plate 3, valve rod 4, elasticity limited ring 5 etc.

As shown in Figure 1, the utility model comprises valve body 1, at the inner chamber of said valve body 1 valve seat 2 is set, and the inner sealing of valve seat 2 cooperates valve plate 3, and valve plate 3 is connected with valve body 1 through valve rod 4, and valve rod 4 is arranged in the valve body 1 through bearing; The sheathed elasticity limited ring 5 at the two ends of said valve rod 4, this elasticity limited ring 5 is between valve plate 3 and valve body 1;

As shown in Figure 2, said elasticity limited ring 5 is the rubber-like annulus, and this annulus is set on the valve rod 4, and the sidewall of annulus 4 can be lineal shape, also can be designed to waveform, to guarantee to have certain compressed capability.The working principle of the utility model: under the condition of high temperature; Valve plate 3 expanded by heating; The elasticity limited ring 5 at valve plate 3 two ends is compressed, and through the elastic compression compensation of elasticity limited ring 5, can guarantee the position no change of valve plate 3; Can not be stuck yet, guarantee the sealing effect under the condition of high temperature simultaneously yet.

Claims

1. elevated-temperature seal butterfly valve; Comprise valve body (1), at the inner chamber of said valve body (1) valve seat (2) is set, the inner sealing of valve seat (2) cooperates valve plate (3); Valve plate (3) is connected with valve body (1) through valve rod (4), and valve rod (4) is arranged in the valve body (1) through bearing; It is characterized in that: at the sheathed elasticity limited rings in the two ends of said valve rod (4) (5), this elasticity limited ring (5) is positioned between valve plate (3) and the valve body (1).

2. elevated-temperature seal butterfly valve as claimed in claim 1 is characterized in that: said elasticity limited ring (5) is for circular, and the sidewall of this elasticity limited ring (5) is shape or waveform linearly.