CN2126898Y

CN2126898Y - Square non-return wind door

Info

Publication number: CN2126898Y
Application number: CN 92224955
Authority: CN
Inventors: 郭长岭; 郭宇; 郭立明
Original assignee: Individual
Current assignee: Individual
Priority date: 1992-06-11
Filing date: 1992-06-11
Publication date: 1993-02-10
Anticipated expiration: 2002-06-11

Abstract

Disclosed is a square non-return wind door, belonging to the class of an air door which is an accessory for an air transmission pipeline. On the basis of the existing square air door which is composed of a housing, baffle plates, front rotating shafts, a support bearing, a back rotating shaft, and a support bearing, a limit piece, a plate for a rotating arm, a connecting pin shaft, a connecting rod, and an elastic sealing sheet, each baffle plate is changed to an eccentric baffle plate whose two wings are of unequal width. The air door can be automatically closed under the actions of the eccentric gravitation and air pressure. The end of one front rotating shaft of the front rotating shafts is fixed with a key which is sheathed with a control arm, the outer end of the control arm is hinged with the connecting rod, and the rotating angles of the baffle plates can be controlled via the connecting rod in the distance. The air door can be stilled automatically closed right now.

Description

Square non-return wind door

The utility model belongs to gas transmission pipeline annex air door class.

On the pipeline that gas is carried, existing square shutoff air door is by shell, several baffle plates, and front rotary shaft and block bearing, back rotating shaft and block bearing, locating part, the pivoted arm plate, connecting link pin, connecting rod, elastic sealing strip is formed.This air door since front rotary shaft and back rotating shaft equal seam on the center at baffle plate two ends, when air-flow stopped to flow, baffle plate can not be closed air door voluntarily, no automatic braking effect.

The purpose of this utility model is: provide a kind of on gas transmission pipeline, can prevent gas backstreaming, the square non-return air door of good airproof performance.

Technical measures of the present utility model are: each baffle plate is the eccentric baffle plate that the both wings width does not wait, front rotary shaft and back rotating shaft just is not fixed on the center at baffle plate two ends, in the air channel, there is air communication out-of-date, the baffle plate both wings are subjected to force unbalance, will inevitably be that rotate at the center with the rotating shaft, air door be opened automatically, when air-flow stops to flow, baffle plate rotates under the effect of gas pressure behind eccentric gravity and the non-return air door air door is closed automatically, stops the backflow of air-flow.

Air door of the present utility model owing to adopt eccentric baffle plate, so behind reliable eccentric gravity and the non-return air door under the effect of gas pressure rotation close air door voluntarily, stop the good effect of airflow reflux.

Fig. 1 is that structural representation of the present utility model, Fig. 2 are that side view, Fig. 3 are side cutaway views.

Fig. 4 is that part section amplifies to revolve and turn 90 degrees schematic diagram.

Fig. 5 is a partial view.

Fig. 6. Fig. 7 is part sectioned view.

1 is shell among the figure, the 2nd, and baffle plate is made up of several baffles in each air door; Each baffle plate 2 hollow baffle plate that to be wing plates of being formed by two compactings form with two end plate seam at a middle riser and two ends, on riser two ends and the end plate respectively seam front rotary shaft 3 and back rotating shaft 4 are arranged.The utility model adopts two wing plates that width is different, makes front rotary shaft 3 and back rotating shaft 4 not seam on the center at baffle plate two ends, forms eccentric baffle plate, relies on the gentle body pressure of eccentric gravity to carry out self-closing damper with regard to forming like this.Front rotary shaft 3 is by bearing 5 supportings that are fixed on the shell 1, back rotating shaft 4 is by bearing 6 supportings that are fixed on the housing 1, the 7th, the locating part of the defining baffle 2 switch pole extreme position of seam on shell 1, on each front rotary shaft 3, fix a pivoted arm plate 8 respectively, the end of each pivoted arm plate 8 links by bearing pin 11 and connecting rod 10 respectively, each baffle plate can not be rotated separately, must rotate synchronously simultaneously with other baffle plate, in order to increase sealing effectiveness, on baffle plate, be fixed with the diaphragm seal of making of thin corrosion resistant plate 13,14,16(sees Fig. 4), in order to control intake, the axle head of the utility model front rotary shaft 3 therein is fixed with a key 15, be set with a control arm 9(in the outside of axle 3 and key 15 and see Fig. 5), there is the arc notch of one 90 degree the axis hole outer of control arm 9, axle 3 and key 15 can be rotated in the scope of notch, the hinged connecting rod 12 of bearing pin K is passed through in outer end at control arm 9, connecting rod 12 is being controlled the angle of control arm 9, so just can adjust the position of control arm 9 by a distant place by connecting rod 12, and then reach and make baffle plate 2 on needed position, in certain angle, regulate air-flow, this moment, baffle plate still can be closed automatically.Fig. 6 is the assembling schematic diagram of back rotating shaft 4 and block bearing 6, and bearing 6 direct seam do not have and leak on shell 1

Problem, the 16th, be fixed on the diaphragm seal on the end plate of baffle plate 2 end faces.Fig. 7 is the assembling schematic diagram of front rotary shaft 3 and block bearing 5, the 17th, and the sealing ring of seam on shell 1, the 19th, filler, the 18th, bonnet.Above-mentioned bearing 6 and 5 all adopts the radial inflow spherical bearing, like this can with axle to contact adaptability good, be difficult for blocking, rotate flexibly.

Claims

1, a kind of square non-return air door is by shell, baffle plate, and front rotary shaft and block bearing, back rotating shaft and block bearing, locating part, the pivoted arm plate, connecting link pin, connecting rod, elastic sealing strip is formed, and it is characterized in that: each baffle plate is the eccentric baffle plate that the both wings width does not wait.

2, by the described air door of claim 1, it is characterized in that:

A. be fixed with a key on the front rotary shaft end therein;

B. be set with a control arm in the outside of front rotary shaft and key, there is the arc notch of one 90 degree the axis hole outer of control arm;

C. be hinged with a connecting rod in the control arm outer end by bearing pin.