CN205578749U - Big flux butt clamp formula high performance butterfly valve - Google Patents

Abstract

The utility model discloses a large flux wafer-type high-performance butterfly valve, which comprises a valve body, a valve plate, a valve seat, an upper valve shaft, a lower valve shaft and a valve body pressing plate. The valve body pressing plate and the valve body are composed of circular cloth. The connecting bolts of the row are fixedly connected, the valve seat is embedded between the valve body and the valve body pressure plate, the valve body pressure plate is the same as the valve port outer diameter of the valve body, and is clamped and positioned at the connection between the valve body and the pipeline. The sealing gasket between the flanges covers the inner ring of the connecting bolts of the pressure plate of the valve body as a whole. The valve body pressing plate of the utility model is the same as the outer diameter of the valve port of the valve body, and the outer circle of the valve body pressing plate is as large as the outer circle of the valve body, and the connecting bolts can be arranged on the outside, and then the diameter of the inner cavity of the valve seat can be designed. Larger, also increases the medium flow of the valve and improves the flow capacity of the valve. That is, under the same appearance volume, the effective diameter of the utility model will be larger to ensure the smooth passage of the medium. The connecting bolts are expanded outward to avoid interference with the sealing gasket and improve the overall sealing performance.

Description

Large flux wafer type high performance butterfly valve

technical field

The utility model relates to the technical field of butterfly valves, in particular to a wafer-type high-performance butterfly valve with large flux.

Background technique

Butterfly valves are widely used in fluid device control equipment in various occasions such as petroleum, chemical industry, metallurgy, electric power, textile, light industry, machinery manufacturing, construction and national defense industry. Valves play a vital role in the entire working device and system. The failure of butterfly valves will cause the system and equipment to fail to work normally, and even lead to catastrophic accidents in serious cases. This requires butterfly valves to have high reliability. .

At the same time, as a cut-off mechanism, the butterfly valve will inevitably affect the fluid when it is turned on. Especially when the volume of the valve is restricted in the installation occasion, the flow capacity of the valve will be limited, which will affect the normal delivery of the fluid. At the same time, the setting of the connecting bolts of the valve body pressure plate will also affect the sealing performance of the sealing ring.

Utility model content

The purpose of the utility model is to provide a large flux wafer type high performance butterfly valve aiming at the technical defects in the prior art.

The technical scheme adopted for realizing the purpose of this utility model is:

A wafer-type high-performance butterfly valve with a large flux, including a valve body, a valve plate, a valve seat, an upper valve shaft, a lower valve shaft and a valve body pressure plate, and the valve body pressure plate and the valve body are fixed by connecting bolts arranged in a circle Connection, the valve seat is embedded between the valve body and the valve body pressure plate, the valve body pressure plate is the same as the outer diameter of the valve port of the valve body, clamping and positioning the sealing between the valve body and the pipe connecting flange The gasket covers the inner ring of the connecting bolts of the pressure plate of the valve body as a whole.

The back of the valve plate is spherical and has no hub in the middle part.

The valve seat is made of PTFE material.

The back of the valve plate is designed with a boss, and the inner cavity of the valve is designed with a boss stopper. When the valve plate is closed, there is a parallel gap of 1-2mm between the boss and the boss stopper to prevent the valve plate from over-closing.

Compared with the prior art, the beneficial effects of the utility model are:

The valve body pressing plate of the utility model is the same as the outer diameter of the valve port of the valve body, and the outer circle of the valve body pressing plate is as large as the outer circle of the valve body. Larger, also increases the medium flow of the valve and improves the flow capacity of the valve. That is, under the same appearance volume, the effective diameter of the utility model will be larger to ensure the smooth passage of the medium. At the same time, the connecting bolts are expanded outward to avoid interference with the sealing gasket and improve the overall sealing performance.

Description of drawings

Fig. 1 shows the structural representation of the large flux wafer type high-performance butterfly valve of the present utility model;

Figure 2 is a schematic cross-sectional view of the assembled state;

FIG. 3 is a partially enlarged schematic diagram of part a shown in FIG. 2 .

detailed description

Below in conjunction with accompanying drawing and specific embodiment the utility model is described in further detail. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not intended to limit the utility model.

As shown in Figures 1-3, the large-flux wafer-type high-performance butterfly valve of the present invention includes a valve body 1, a valve plate 2, a valve seat 3 and a valve body pressure plate 4, and the valve body pressure plate 4 and the valve body 1 are composed of The connecting bolts 5 arranged in a circle are fixedly connected, the valve seat 3 is clamped and embedded between the valve body and the valve body pressure plate, the valve body pressure plate 4 is the same as the outer diameter of the valve port of the valve body 1, The sealing gasket 6 clamped and positioned between the valve body and the pipeline connecting flange 8 covers the inner ring of the connecting bolt of the valve body pressure plate 4 as a whole. Specifically, the sealing mechanism between the valve body and the pipeline connection flange includes a centering ring 7 fixedly connected with the valve body, and a sealing gasket 6 integrally formed in the centering ring, which is similar to the prior art and will not be repeated here. Expand the description.

The valve body pressing plate of the utility model is the same as the outer diameter of the valve port of the valve body, and the outer circle of the valve body pressing plate is as large as the outer circle of the valve body. Larger, also increases the medium flow of the valve and improves the flow capacity of the valve. That is, under the same appearance volume, the effective diameter of the utility model will be larger to ensure the smooth passage of the medium. At the same time, the connecting bolts are expanded outward to avoid interference with the sealing gasket and improve the overall sealing performance.

Further, the thickness of the center of the valve plate is reduced. At the same time, the valve plate adopts a design with a spherical back and no hub in the middle, which increases the medium flow rate of the valve and improves the performance of the valve while ensuring the strength of the valve shaft and the valve plate. flow capacity of the valve.

Preferably, the valve seat is made of PTFE, and the sealing of the valve is achieved by the extrusion deformation of the valve plate and the valve seat. PTFE has certain elasticity and strong corrosion resistance, which can be used in various occasions.

Preferably, the back of the valve plate is designed with a boss, and the inner cavity of the valve is designed with a boss stopper. When the valve plate is closed, there is a parallel gap of 1-2mm between the boss and the boss stopper to prevent the valve plate from over-closing.

The above is only a preferred embodiment of the utility model, it should be pointed out that for those of ordinary skill in the art, without departing from the principle of the utility model, some improvements and modifications can also be made, these Improvement and retouching should also be regarded as the protection scope of the present utility model.

Claims (4)

1. a big flux wafer type high-performance butterfly valve, it is characterized in that, including valve body, valve plate, valve seat, upper valve shaft, lower valve shaft and valve body pressing plate, valve body pressing plate is connected by the connecting bolt of rounded Boulez is fixing with valve body, described valve seat is embedded between valve body and valve body pressing plate, described valve body pressing plate is identical with the valve port external diameter of described valve body, and clamping position gasket seal entirety between valve body and pipeline coupling flange covers the connecting bolt inner ring at valve body pressing plate.

2. big flux wafer type high-performance butterfly valve as claimed in claim 1, it is characterised in that the back of described valve plate spherically shape and mid portion are without propeller boss.

3. big flux wafer type high-performance butterfly valve as claimed in claim 1, it is characterised in that described valve seat is PTFE material.

4. big flux wafer type high-performance butterfly valve as claimed in claim 1, it is characterised in that valve plate back designs has boss, body cavity to be designed with boss block, and when valve plate is closed, boss and boss block exist parallel clearance 1-2mm.