CN2566065Y

CN2566065Y - Framework type pinless butterfly valve

Info

Publication number: CN2566065Y
Application number: CN 02278476
Authority: CN
Inventors: 魏德哲; 许林坡; 袁林枫
Original assignee: HENAN SHANGDIE VALVE CO Ltd
Current assignee: HENAN SHANGDIE VALVE CO Ltd
Priority date: 2002-07-21
Filing date: 2002-07-21
Publication date: 2003-08-13
Anticipated expiration: 2012-07-21

Abstract

The utility model relates to a framework type butterfly valve without a pin. The utility model comprises a valve body and a valve plate, and valve shafts are composed of an upper valve shaft and a lower valve shaft. The utility model is characterized in that An annular back sealed ring coated with a rubber layer is fixedly arranged in the valve body, and the upper and the lower valve shafts are penetrated through shaft holes in the annular back sealed ring in order to match with an upper and a lower blind holes arranged in the valve plate. The valve plate and the sealed ring are matched mutually to form a sealed pair, the lower end of the upper valve shaft is provided with a flat square structure which is inserted in the blind hole having the corresponding shape in the valve plate, and a positioning shaft pin is arranged between the valve body and the upper and the lower valve shafts. The utility model has the advantages that the thickness of rubber is reduced due to the adoption of the back sealed ring, switching and sealing performance are favorable, and operating torque can be reduced; the phenomena of the existing butterfly valve having leakage and corrosion via pin connection is overcome due to the adoption of the blind hole type valve plate without pin connection, the service life of the valve is prolonged, the thickness of the valve plate is reduced, and flow area is enlarged. Positioning pin shafts and clamping springs are arranged between the valve shafts and the valve body and between shaft sleeves and the valve body, and axial float between the valve shafts and the shaft sleeves is avoided.

Description

Skeleton no pin butterfly valve

(1) technical field

The utility model relates to a kind of butterfly valve, and especially a kind of skeleton no pin butterfly valve mainly is applicable on corrosivity such as oil, chemical industry and the noncorrosive liquid medium transfer line.

(2) background technique

In the prior art, the different butterfly valve kind of style is a lot, performance differs, Chinese patent once disclosed a kind of " valve seat and the exoskeletal butterfly valve of valve body tenon joint type ", its patent No. is 87206595, its structure is: valve plate adopts taper pin to be connected with valve shaft, the valve plate rotary shaft hole adopts through-hole structure, and rubber valve seat is direct and the inner side surface joggle of valve body, the deficiency of this valve is: the junction of taper pin and valve plate easily produces the seepage of medium, is unfavorable for line seal, and the passing hole type rotary shaft hole makes that the thickness of valve plate is bigger, influence the negotiability of pipeline, valve body inner side surface processing difficulties.

(3) summary of the invention

A kind of novel skeleton no pin butterfly valve that the purpose of this utility model designs at existing deficiency in the above-mentioned prior art just, this butterfly valve reasonable in internal structure, backrest seal ring modern design, valve shaft and valve plate combination are simple, do not have pin and connect, good seal performance, circulation area is big.

The purpose of this utility model realizes by following scheme: this skeleton no pin butterfly valve comprises valve body, be arranged on the valve plate that valve shaft drives that passes through in the valve body, valve shaft is by last, lower valve shaft is formed, wherein going up valve shaft is installed in the valve body by axle sleeve, the annular backrest seal ring that is enclosed with rubber layer on it is packed in the valve body, last lower valve shaft passes the blind hole up and down that processes on axis hole and the valve plate on the annular backrest seal ring and matches, valve plate and seal ring complement each other to form sealing pair, the lower end of last valve shaft is flat square structure, be inserted in the blind hole of respective shapes on the valve plate, between valve body and last lower valve shaft, be provided with location axle pin, for play does not up and down take place the restriction axle sleeve, be provided with jump ring on the valve shaft on the Lower shaft sleeve upper end position correspondence.

In the utility model, for preventing the play of lower valve shaft, be positioned at the upper valve sleeve lower end on be processed with annular groove on the valve shaft, location axle pin is inserted in this groove by the pivot hole that processes on the valve body; Be processed with annular groove on lower valve shaft, location axle pin is inserted in this groove by the pivot hole that processes on the valve body.

The utility model has the following advantages compared to existing technology: owing to adopt the backrest seal ring, attenuate the thickness of rubber, help switch and sealability, reduce operational torque; Adopt not have the blind-hole type valve plate that pin connects, leakage and corrosion phenomenon when having overcome existing butterfly valve and connecting with pin have prolonged working life of valve, have reduced the thickness of valve plate, have increased circulation area; Between valve shaft and the valve body, all installed alignment pin and jump ring additional between axle sleeve and the valve body, effectively prevented the axial float of valve shaft and axle sleeve, guarantee sealability.

(4) description of drawings

Fig. 1 is a plan view of the present utility model.

Fig. 2 is that enlarged view cuts open in location axle pin, jump ring mounting point, location office.

A kind of embodiment's of Fig. 3 the utility model side view.

Fig. 4 is the another kind of embodiment's of the utility model a side view.

(5) embodiment

The utility model is described further below in conjunction with accompanying drawing:

As Fig. 1, shown in Figure 2: this skeleton no pin butterfly valve comprises valve body 1, be arranged on the valve plate 4 that valve shaft drives that passes through in the valve body, valve shaft is by last, lower valve shaft is formed, wherein going up valve shaft 5 is installed in the valve body 1 by axle sleeve 6, the annular backrest seal ring 2 that is enclosed with rubber layer on it is packed in the valve body 1, on, lower valve shaft passes the blind hole up and down that processes on axis hole and the valve plate 4 on the annular backrest seal ring 2 and matches, valve plate 4 complements each other to form sealing pair with seal ring 2, the lower end of last valve shaft 5 is flat square structure, be inserted in the blind hole of respective shapes on the valve plate 4, on preventing, the play of lower valve shaft, be positioned at the upper valve sleeve lower end on be processed with annular groove on the valve shaft 5, location axle pin 8 is inserted in this groove by the pivot hole that processes on the valve body 1; Also be processed with annular groove on lower valve shaft 3, location axle pin 8 is inserted in this groove by the pivot hole that processes on the valve body.Be provided with jump ring 7 on the valve shaft 5 on the Lower shaft sleeve upper end position correspondence, with the position of restriction Lower shaft sleeve.

Lower end at lower valve shaft 3 also offers the startup groove, conveniently detachable butterfly valve.

9 are valve shaft driving assembly among the figure.

Fig. 3 is an a kind of embodiment's of the present utility model side view, promptly adopts the wafer type Placement with being connected of pipeline.

Fig. 4 is the another kind of embodiment's of the utility model a side view, promptly adopts the lug type Placement with being connected of pipeline.

Claims

1, a kind of skeleton no pin butterfly valve, it comprises valve body (1), be arranged on the valve plate (4) that valve shaft drives that passes through in the valve body, valve shaft is by last, lower valve shaft (5) (3) is formed, wherein going up valve shaft (5) is installed in the valve body (1) by axle sleeve (6), it is characterized in that: the annular backrest seal ring (2) that is enclosed with rubber layer on it is packed in the valve body (1), on, lower valve shaft (5) (3) passes the blind hole up and down that processes on axis hole and the valve plate (4) on the annular backrest seal ring (2) and matches, valve plate (4) complements each other to form sealing pair with seal ring (2), the lower end of last valve shaft (5) is flat square structure, being inserted into valve plate (4) goes up in the blind hole of respective shapes, at valve body (1) and last, be provided with location axle pin (8) between the lower valve shaft (5) (3), on valve shaft on the Lower shaft sleeve upper end position correspondence, be provided with jump ring (7).

2, skeleton no pin butterfly valve according to claim 1 is characterized in that: be positioned at the upper valve sleeve lower end on be processed with annular groove on the valve shaft (5), location axle pin (8) is inserted in this groove by the pivot hole that processes on the valve body (1).

3, skeleton no pin butterfly valve according to claim 1, it is characterized in that: be processed with annular groove on lower valve shaft (3), location axle pin (8) is inserted in this groove by the pivot hole that processes on the valve body.