CN203585452U

CN203585452U - Low-leakage multi-blade check valve

Info

Publication number: CN203585452U
Application number: CN201320711772.7U
Authority: CN
Inventors: 汪琴; 刘家钊; 刘静; 甘瑞霞; 陈达海; 邓雨生; 杨日辉; 严连菊; 朱建康
Original assignee: NANFANG VENTILATOR CO Ltd
Current assignee: NANFANG VENTILATOR CO Ltd
Priority date: 2013-11-12
Filing date: 2013-11-12
Publication date: 2014-05-07
Anticipated expiration: 2023-11-12

Abstract

A low-leakage multi-blade check valve comprises a valve body (1), butterfly plates (2), rotating shafts (3), valve seats (4), bearing seats (6), a connection rod mechanism (7) and a heavy hammer (8). The rotating shafts (3) are mounted on the bearing seats (6), two sides of each butterfly plate (2) are fixedly connected with the corresponding rotating shaft (3), each butterfly plate (2) corresponds to one valve seat (4) which is of an enclosed loop shape, a sealing ring (5) is inlaid in each valve seat (4), sealing faces of the butterfly plates (2) tightly press on the sealing rings (5) when the valve is totally closed, and each of the rotating shafts (3) is an end shaft with two sections concentric When the low-leakage multi-blade check valve is totally closed, the sealing faces of the butterfly plates tightly press on the sealing rings, contact area between each butterfly plate and the corresponding sealing ring is large, the contact surfaces of the butterfly plates and the sealing rings are less prone to leakage, and sealing performance is strong.

Description

The leafy safety check of low leakage

Technical field

The utility model relates to a kind of safety check, particularly relates to a kind of leafy safety check that is applied to ventilation system.

Background technique

Shown in Fig. 1 is the structural drawing of the existing leafy safety check that is applied to ventilation system under in off position, this leafy safety check is realized sealing on need to going up the lower limb of a butterfly plate and be overlapped on the top edge of next butterfly plate, also need the rotating shaft sealing of valve seat to the first butterfly plate, but because rotating shaft is cambered surface, the surface of contact of rotating shaft and valve seat is little, there is angle of inclination in the overlap joint between butterfly plate and butterfly plate, surface of contact between butterfly plate and butterfly plate is little, therefore, this leafy safety check easily leaks from the contacting point of rotating shaft and valve seat and the contacting point between butterfly plate and butterfly plate, and sealing is poor.

Model utility content

The technical problems to be solved in the utility model is, a kind of strong sealability that has is provided, and can realize the leafy safety check of low leakage.

For solving the problems of the technologies described above, the leafy safety check of a kind of low leakage of the present utility model comprises valve body, butterfly plate, rotating shaft, valve seat, bearing support, linkage mechanism, weight, rotating shaft is arranged on bearing support, each rotating shaft connects by linkage mechanism, it is characterized in that: described butterfly plate both sides are fixedly connected with rotating shaft respectively, the corresponding valve seat of described each butterfly plate, described valve seat is closed circular, valve seat is embedded with seal ring, and valve is under buttoned-up status, and the sealing surface of butterfly plate is pressed on seal ring.

Described rotating shaft is two sections of concentric end axles.

The utility model is due under buttoned-up status, and the sealing surface of butterfly plate is pressed on seal ring, and the surface of contact area between butterfly plate and seal ring is larger, therefore, is difficult for leaking from butterfly plate and seal ring surface of contact, and sealability is stronger.

Accompanying drawing explanation

Below in conjunction with accompanying drawing, the utility model is specifically described.

Fig. 1 is the closed condition sectional view of existing leafy safety check.

Fig. 2 is structural representation of the present utility model.

Fig. 3 is the C-C sectional view of Fig. 2.

Specific embodiments

As shown in Figures 2 and 3, the leafy safety check of a kind of low leakage comprises valve body 1, butterfly plate 2, rotating shaft 3, valve seat 4, bearing support 6, linkage mechanism 7, weight 8, rotating shaft 3 is arranged on bearing support 6, described butterfly plate 2 both sides are fixedly connected with rotating shaft 3 respectively, the corresponding valve seat 4 of described each butterfly plate 2, described valve seat 4 is closed circular, valve seat 4 is embedded with seal ring 5, valve is under buttoned-up status, and the sealing surface of butterfly plate 2 is pressed on seal ring 5.Because the surface of contact area between butterfly plate 2 and seal ring 5 is larger, therefore, be difficult for leaking from butterfly plate 2 and seal ring 5 surface of contact, sealability is stronger.

For alleviating the quality of safety check, save material, described rotating shaft 3 is two sections of concentric end axles.

Claims

1. the leafy safety check of low leakage, comprise valve body (1), butterfly plate (2), rotating shaft (3), valve seat (4), bearing support (6), linkage mechanism (7), weight (8), rotating shaft (3) is arranged on bearing support (6), it is characterized in that: described butterfly plate (2) both sides are fixedly connected with rotating shaft (3) respectively, the corresponding valve seat of described each butterfly plate (2) (4), described valve seat (4) is closed circular, valve seat (4) is embedded with seal ring (5), valve is under buttoned-up status, and the sealing surface of butterfly plate (2) is pressed on seal ring (5).

2. according to the leafy safety check of low leakage claimed in claim 1, it is characterized in that: described rotating shaft (3) is two sections of concentric end axles.