CN215596500U

CN215596500U - Dead weight type closed fan valve

Info

Publication number: CN215596500U
Application number: CN202122223911.9U
Authority: CN
Inventors: 陈炯; 彭文伟
Original assignee: Zhejiang Top Motoring Technology Co ltd
Current assignee: Zhejiang Top Motoring Technology Co ltd
Priority date: 2021-09-14
Filing date: 2021-09-14
Publication date: 2022-01-21
Anticipated expiration: 2031-09-14

Abstract

The utility model discloses a self-weight type closed fan valve, which comprises an air valve barrel and is characterized in that the air valve barrel is formed by encircling two semi-circular arc sheets, and two end faces of the encircled air valve barrel form an acute angle; the air inlet end of the air valve cylinder is matched with the fan, the air outlet end is provided with a pair of air doors, and the pair of air doors are hinged on the same door shaft through hinges; two ends of the door shaft are positioned in the shaft terminals, and a limiting mechanism is arranged between the hinge close to the shaft terminals and the shaft terminals. The opening/closing action is completely finished by wind power and the dead weight of the air door, and no other power configuration is needed, so that the energy is saved; the friction force is reduced among the rotating parts, so that the movement is light and sensitive; the air exhaust system engineering of fans with different power can be satisfied, the structure is stable and reliable, and the service life is long.

Description

Dead weight type closed fan valve

Technical Field

The utility model relates to a fan manufacturing technology, in particular to a dead weight type closed fan valve.

Background

The fan valve is a part for protecting the safety of the fan and the equipment thereof, when the pressure in the fan and the equipment abnormally rises to a certain specified value (the opening pressure of the safety valve), the safety valve can automatically open and discharge a medium to prevent the pressure from continuously rising, and when the pressure in the fan and the equipment falls to a certain specified value (the recoil pressure of the safety valve), the safety valve automatically closes. The traditional safety valve mainly has two opening and closing modes, firstly, a spring with lower rigidity is adopted, and the structure has the defect that the traditional safety valve cannot accurately and sensitively act under low pressure; the other is an electrically controlled valve, such as the patent publication No. CN203868359U, which includes a valve body, a rotating shaft with two ends penetrating through the valve body, a blade sleeved on the rotating shaft, a stopping device disposed at a position on the valve body where the stopping device can contact the blade, a motor mechanically connected to the rotating shaft, and a controller electrically connected to the motor. The electrically controlled type is inferior to the former in terms of energy saving. In addition, theoretically, the weight of the air door should be light, but the light-weight structure is often insufficient in strength, and the rotating part of the door panel with larger weight has larger friction force between hinges due to the action of gravity, so that the sensitivity is poor.

Disclosure of Invention

The utility model aims to solve the problems and provides a dead weight type closed fan valve which has a dead weight type air door closing mechanism without power control, and has the characteristics of small friction coefficient among rotating parts, high sensitivity, self-limitation of the maximum opening position of an air door and the like.

The technical problem of the utility model is mainly solved by the following technical scheme: a dead weight type closed fan valve comprises an air valve cylinder body and is characterized in that the air valve cylinder body is formed by encircling two semi-circular arc sheets, and two end faces of the encircled air valve cylinder body form an acute angle; the air inlet end of the air valve cylinder is matched with the fan, the air outlet end is provided with a pair of air doors, and the pair of air doors are hinged on the same door shaft through hinges; two ends of the door shaft are positioned in the shaft terminals, and a limiting mechanism is arranged between the hinge close to the shaft terminals and the shaft terminals.

In the aforementioned dead-weight type closed fan valve, preferably, the end faces of the air inlets of the two end faces of the air valve cylinder are perpendicular to the central line of the air valve cylinder.

In the aforementioned dead weight formula closed fan valve, as preferred, a pair of air door is left air door and right air door, and left air door and right air door are articulated the location on the door-hinge through a plurality of left hinges, right hinges respectively.

In the aforementioned dead weight type closed fan valve, as an optimal selection, among a plurality of left hinges and right hinges, a limiting mechanism is arranged in a direction of the shaft end of the left hinge or the right hinge at the lowermost end, and the limiting mechanism is a limiting pipe.

In the aforementioned dead weight type closed fan valve, as preferred, the shaft terminal includes a seat body connected with an end face of an air outlet end of the air valve cylinder, and a limiting body located on the seat body in the air outlet direction, and an inclined supporting plate is arranged between the limiting body and the seat body.

In the aforementioned dead weight type closed fan valve, preferably, a flat bearing is disposed between the left hinge and the right hinge.

In the self-weight type closed fan valve, preferably, the two sides of the width of the limiting body on the shaft terminal satisfy the condition that the left air door and the right air door are in the maximum opening position, and the two air doors are both positioned at the position which is not more than 90 degrees with the end face of the air outlet of the air valve cylinder.

In the aforementioned dead weight type closed fan valve, as preferred, the reinforcing ribs integrated with the plate body are arranged on the webs of the left air door and the right air door.

This technical scheme uses the blast gate as the design target, encloses into a circular barrel through two semicircle slices to make two terminal surfaces of barrel become an acute angle mutually, two semicircle slices can rational utilization panel, do not produce more material waste, and the manufacturing process is simple moreover, and its circle structural strength also obtains improving by a wide margin after the hem merges. One end of the air valve cylinder body is matched with the fan, and the air outlet end at the other end is provided with an air door (cover plate). The air door is composed of a left block and a right block, is hinged on a door shaft, and realizes opening/closing action under the action of wind power and dead weight. This scheme mainly used level project of airing exhaust, the air door is in the tilt state all the time, and the air door pastes tight air valve barrel terminal surface and forms and close, and the air door is opened completely and is pushed up by fan pressure, and the air door is pushed down by the dead weight and is closed again when fan stop work does not have pressure.

The included angle that two terminal surfaces of air valve barrel become can match according to fan function size, as long as the air door is located the tilt state, then whenever (open/close meeting) the gravity of air door all is decurrent, its closing force depends on the horizontal component of gravity, the inclination is bigger, the horizontal component is also big, according to this principle, this scheme even the product of same specification and size can also be applied to the exhaust system of different power size fans, as long as change its contained angle, make closing gravity satisfy exhaust pressure can.

The shaft terminal in this scheme has the air door and opens the time limit effect completely, and the spacing body width slightly is greater than left and right air door and opens completely, is in the distance between the two when parallel state, guarantees that left and right air door is perpendicular with air valve barrel terminal surface basically at the open state completely, and under the natural state of not airing exhaust, the gravity of left and right air door nevertheless produces the effect of downward force to its self all the time, makes the air door immediately closed.

In order to reduce the friction force generated by rotation between the hinges, the plane bearing is arranged between the left hinge and the right hinge, so that the left air door and the right air door can be flexibly moved. Because the inclined plane makes the gravity of left and right air door concentrate on the hinge of the below on the fulcrum relatively, so suit spacing pipe on the door axis of a hinge of below towards axle end direction, play stable support effect to whole air door subassembly.

Compared with the prior art, the utility model has the beneficial effects that: the opening/closing action is completely finished by wind power and the dead weight of the air door, and no other power configuration is needed, so that the energy is saved; the friction force is reduced among the rotating parts, so that the movement is light and sensitive; the air exhaust system engineering of fans with different power can be satisfied, the structure is stable and reliable, and the service life is long.

Drawings

FIG. 1 is a schematic diagram of an embodiment of the present invention.

Fig. 2 is a front view of the present invention.

Fig. 3 is a schematic view of a part of the enlarged structure at M in fig. 1.

Fig. 4 is a right side view of fig. 2.

Fig. 5 is a schematic view of a shaft terminal structure according to the present invention.

Fig. 6 is a partially enlarged structural view of the hinge assembly of the present invention.

In the figure: 1. the air valve comprises an air valve cylinder body, 2 shaft terminals, 201 a seat body, 202 shaft holes, 203 a limiting body, 204 a diagonal bracing rib, 3 left air doors, 4 right air doors, 5 limiting pipes, 6 reinforcing ribs, 7 left hinges, 8 right hinges, 9 plane bearings and 10 door shafts.

A. And (4) end face included angle.

Detailed Description

The technical scheme of the utility model is further specifically described by the following embodiments and the accompanying drawings.

This embodiment is a dead weight formula closed fan valve, as shown in fig. 1, fig. 2, establishes a pipe shape blast gate barrel 1, and blast gate barrel 1 is enclosed by two semicircle pieces and forms, and two terminal surfaces of blast gate barrel 1 become an acute angle a, and a equals 15 degrees, and the air intake terminal surface in two terminal surfaces is perpendicular with 1 central line of blast gate barrel.

Establish a ring at the air outlet end of blast gate barrel 1, the ring has two faces to constitute: one surface is consistent with the air outlet direction, and the other surface is positioned on the plane where the 15-degree acute angle is positioned and used for installing two air doors, namely a left air door 3 and a right air door 4. The two air doors are made of aluminum plates, and reinforcing ribs 6 are arranged in the plate breadth of the air doors to improve the plane strength of the air doors, as shown in fig. 4.

The left air door 3 and the right air door 4 are hinged and positioned on the same door shaft 10 through a left hinge 7 and a right hinge 8 respectively, as shown in fig. 3 and 6, the door shaft 10 is positioned on a diameter of the air outlet end of the air valve cylinder 1 in the up-and-down direction, and two ends of the door shaft 10 are positioned in the shaft terminal 2.

The shaft terminal 2 is integrally L-shaped as shown in fig. 5, the shorter section is a seat body 201 connected with the end face of the air outlet end of the air valve cylinder 1, the longer section is a limiting body 203 extending from the seat body in the air outlet direction, and an inclined brace rib 204 is arranged between the limiting body 203 and the seat body 201. The base body 201 is provided with a shaft hole 202, and the shaft hole 202 is a counter bore.

The width of the spacing body 203 on the shaft terminal 2 is to satisfy that the left air door 3 and the right air door 4 are in the maximum position state of opening, and both air doors are all in and form an angle of 90 degrees with the air outlet end face of the air valve cylinder body 1.

A plane bearing 9 is arranged between the left hinge 7 and the right hinge 8, a limiting pipe 5 is arranged on the left hinge 7 or the right hinge 8 at the lowest position on the door shaft 10 towards the shaft terminal 2, and the plane bearing 9 is also arranged between the limiting pipe 5 and the adjacent hinge.

When the air valve barrel is installed, the flange at one end of the air valve barrel 1 corresponding to the fan is connected with the fan flange, and the air outlet at the other end is upward at a natural small inclination angle. When the fan is started, the wind pressure is increased from zero, and when the wind pressure is greater than the gravity component of the air door along the wind outlet direction, the air door is lifted and pushed up until the maximum opening angle is reached. When the fan is shut down, the air door is closed under the action of self gravity in the process that the air pressure is reduced.

The above embodiments are illustrative of the present invention, and are not intended to limit the present invention, and any simple modified structure of the present invention is within the scope of the present invention without departing from the principle of the present invention.

Claims

1. A dead weight type closed fan valve comprises an air valve cylinder body (1) and is characterized in that the air valve cylinder body is formed by encircling two semi-circular arc pieces, and two end faces of the encircled air valve cylinder body form an acute angle; the air inlet end of the air valve cylinder is matched with the fan, the air outlet end is provided with a pair of air doors, and the pair of air doors are hinged on the same door shaft (10) through hinges; two ends of the door shaft are positioned in the shaft end terminals (2), and a limiting mechanism is arranged between the hinge close to the shaft end terminals and the shaft end terminals.

2. The dead-weight type closed fan valve according to claim 1, wherein the air inlet end faces of the two end faces of the air valve cylinder (1) are perpendicular to the central line of the air valve cylinder (1).

3. The dead-weight type closed fan valve as claimed in claim 1, wherein the pair of air doors are a left air door (3) and a right air door (4), and the left air door and the right air door are respectively hinged and positioned on a door shaft (10) through a plurality of left hinges (7) and right hinges (8).

4. A dead-weight type closed fan valve as claimed in claim 3, wherein, among the left hinge (7) and the right hinge (8), the left hinge or the right hinge at the lowest end is provided with a limiting mechanism towards the shaft terminal (2), and the limiting mechanism is a limiting pipe (5).

5. The dead-weight type closed fan valve as claimed in claim 1, wherein the shaft terminal (2) comprises a seat body (201) connected with the end face of the air outlet end of the air valve cylinder (1), and a limiting body (203) located on the seat body in the air outlet direction, and a diagonal bracing rib (204) is arranged between the limiting body and the seat body.

6. A dead-weight closed fan valve as claimed in claim 3, wherein a flat bearing (9) is provided between the left hinge (7) and the right hinge (8).

7. The self-weight type closed fan valve as claimed in claim 5, wherein the width of the limiting body (203) on the shaft terminal (2) is such that the left air door (3) and the right air door (4) are in the maximum opening position, and the two air doors are both located at the position which is not more than 90 degrees with the end face of the air outlet of the air valve cylinder (1).

8. The dead-weight type closed fan valve as claimed in claim 1, wherein the web of the left air door (3) and the right air door (4) is provided with a reinforcing rib (6) integrated with the plate body.