CN2648198Y

CN2648198Y - Butterfly valve

Info

Publication number: CN2648198Y
Application number: CN 03279060
Authority: CN
Inventors: 喻文山; 吴结涟
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-09-29
Filing date: 2003-09-29
Publication date: 2004-10-13
Anticipated expiration: 2013-09-29

Abstract

The utility model provides a butterfly valve, which comprises a butterfly board, a valve cavity and a rotary axis, the butterfly board is arranged in the valve cavity through the rotary axis which penetrates the butterfly board and the center of the valve cavity, the utility model is characterized in that the outer of the butterfly board is covered with a rubber layer. As the utility model adopts the rubber layer and the butterfly board one body modeling technics, the rubber layer is not easy to fall off, and the rotary axis and the butterfly board is designed to be closer, the sealing performance of the butterfly valve is better, and the service life is long.

Description

Butterfly valve

Technical field

The utility model relates to the valve arrangement field, particularly a kind of butterfly valve apparatus.

Background technique

Butterfly valve is one of common type in the valve arrangement, because of its valve plates is gained the name like butterfly.Existing reed valve includes valve cavity, butterfly plate, rotating shaft and power mechanism and forms, the central authorities that this rotating shaft one end runs through valve cavity and butterfly plate, thereby butterfly plate is arranged in the valve cavity, its the other end is connected on the power mechanism, and the rotating shaft two ends in this butterfly plate and its are by the fixing interlock of two taper pins, so when power mechanism moved, the rotating shaft meeting was rotated thereupon, the interlock butterfly plate overturns in valve cavity, makes valve be the closure or openness state.This butterfly plate and valve cavity are fabricated metals, in order to strengthen the sealing of valve, now often paste or fastening piece is fixed with rubber sealant at the inwall of valve cavity, but when usual the use, because repeated friction, the rubber layer of valve cavity is damaged easily, come off, and causes valve to seal inadequately; The sealing that causes of the decentraction of the butterfly plate that produces because of the gap between butterfly plate and rotating shaft and valve cavity is unreliable in addition, or because of taper pin fracture or distortion cause afunction, causes the weak point in working life of existing butterfly valve.

Summary of the invention

The purpose of this utility model is in order to overcome the defective of prior art, a kind of butterfly valve apparatus of improvement to be provided.

The purpose of this utility model realizes by following technical proposals: a kind of butterfly valve, it includes butterfly plate, valve cavity and rotating shaft, this butterfly plate is arranged in the valve cavity by the central authorities that this rotating shaft runs through itself and valve cavity, it is characterized in that this butterfly plate is coated with rubber layer.

Wherein, this rotating shaft two-end part that is applied in this butterfly plate has rolled straight decorative pattern.

The circle Zhou Yiti of this butterfly plate has moulded rubber layer, and the thickness of this rubber layer can be 2-5mm.

In addition, this butterfly plate can also be thereon, rubber layer has all been moulded on the two sides down, and one-body molded with the rubber layer in circle week, and the thickness of this rubber layer also can be 2-5mm.

Positive progressive effect of the present utility model is:

1, butterfly plate of the present utility model has coated one deck rubber layer outward, this rubber layer combines by the mold pressing once-through with butterfly plate, make rubber layer difficult drop-off and dislocation, add reasonable cooperation the between butterfly plate and valve cavity, make the sealability of this butterfly valve better, butterfly plate does not corrode because of medium, long service life;

2, the utility model has straight decorative pattern in the design of the rotating shaft two-end part in butterfly plate, directly be pressed into rotating shaft in the butterfly plate during assembling, because the nonhomogeneous hardness of rotating shaft and butterfly plate, make butterfly plate distortion and with the rotating shaft close fit, and locate and provide the ability of enough transfer of torque thus, the sealing of having avoided the decentraction of butterfly plate that existing butterfly valve produces because of the gap between butterfly plate and rotating shaft and valve cavity to cause is unreliable or because of the taper pin fracture or be out of shape the afunction that causes.

Description of drawings

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

Fig. 2 is a generalized section of the present utility model.

Fig. 3 directly is pressed into the structural representation of butterfly plate for the utility model one embodiment's rotating shaft.

Fig. 4 is another embodiment's of the utility model a butterfly plate structural profile schematic representation.

Embodiment

Lift two preferred embodiments below, and come the clearer the utility model that intactly illustrates in conjunction with the accompanying drawings.

Embodiment 1

As Fig. 1, Fig. 2, shown in Figure 3, butterfly valve of the present utility model includes members such as butterfly plate 1, valve cavity 2 and rotating shaft 3 and forms, the central authorities that these rotating shaft 3 one ends run through valve cavity 2 and butterfly plate 1, thereby butterfly plate 1 is arranged in the valve cavity 2, its the other end is connected in (figure does not show) on the power mechanism, and its characteristics are that this butterfly plate is coated with rubber layer 11.As shown in Figure 3, this rubber layer 11 is coated on the circle week of butterfly plate 1, and is moulded with its metal layer 12 one, and the thickness of this rubber layer 11 is generally 2-5mm; In addition, this rotating shaft two-end part that is applied in this butterfly plate 1 has rolled straight decorative pattern 31, and during assembling, this rotating shaft 3 directly is pressed into the effect of playing location and transfer of torque in the butterfly plate 1.

Embodiment 2

By shown in Figure 4, the upper and lower faces of the butterfly plate 1 of this butterfly valve and circle Zhou Jun are coated with integrated rubber layer 11, and its thickness generally also is 2-5mm.The remaining part of butterfly valve is identical with embodiment 1, does not give unnecessary details at this.

By said structure, when power mechanism (figure does not show) action, rotating shaft 3 of the present utility model is rotated thereupon, and interlock butterfly plate 1 stirs in valve cavity 2, make valve be the closure or openness state, and its closed state will more seal.

Claims

1, a kind of butterfly valve, it includes butterfly plate, valve cavity and rotating shaft, and this butterfly plate is arranged in the valve cavity by the central authorities that this rotating shaft runs through itself and valve cavity, it is characterized in that this butterfly plate is coated with rubber layer.

2, butterfly valve as claimed in claim 1 is characterized in that this rotating shaft two-end part that is applied in this butterfly plate has rolled straight decorative pattern.

3, butterfly valve as claimed in claim 1 is characterized in that the circle Zhou Yiti of this butterfly plate has moulded rubber layer, and the thickness of this rubber layer is 2-5mm.

4, butterfly valve as claimed in claim 3 is characterized in that the upper and lower faces of this butterfly plate has been moulded rubber layer, and one-body molded with the rubber layer in circle week, and the thickness of this rubber layer is 2-5mm.