RU166903U1 - AIR VENT CHANNEL OVERLAPPING DEVICE - Google Patents

Abstract

1. The device for blocking the air ventilation channel, containing two rows of oppositely directed overlapping elements made in the form of dampers, the front edges of which are oriented parallel to the direction of the air flow, mounted on the axes with the possibility of rotation under the influence of a critical change in the speed of the air flow and interacting with the device for holding the dampers, allowing air to flow through the device at speeds lower than the critical speed, while your device includes a device for the simultaneous forced closing and opening of the shutters of each row, which has a vertical movable rod connected to the shutters, characterized in that both rows of overlapping elements are installed in a single housing made in the form of a metal frame, and all shutters of the same row are pivotally connected to two vertical movable rods of a spring-loaded movable frame with the formation of devices for holding the dampers, while devices for simultaneous forced closing The flaps of each row are opened and opened in the form of stops on movable frames that interact with the working surfaces of the eccentrics fixed on a shaft common to two eccentrics. 2. The device according to claim 1, characterized in that the shaft has a removable handle for manual drive.

Description

IPC: F16K 17/34

AIR VENT CHANNEL OVERLAPPING DEVICE

The technical field to which the utility model belongs .

This utility model relates to equipment for blocking air ventilation ducts when exposed to an air shock wave and a rarefaction wave, and more particularly, to devices for blocking air ventilation ducts containing two rows of oppositely directed overlapping elements made in the form of dampers, the front edges of which are oriented parallel to the direction of the air flow mounted on axles with the possibility of rotation under the influence of a critical change in air velocity and interacting with the device for holding the dampers, allowing air to pass through the device at speeds lower than the critical speed, the device includes a device for simultaneously forcing closing and opening the dampers of each row, which has a vertical movable link connected to the dampers, and can be used for emergency shutdown air ventilation ducts during explosions and similar sharp pressure drops.

In the present description, a critical change in air flow is understood to mean any sudden change in the parameters of the air flow - as pressure gradients during the passage of an air shock wave or rarefaction wave.

The level of technology.

The prior art device for blocking the air ventilation duct, containing two rows of oppositely directed overlapping elements made in the form of dampers, the front edges of which are oriented parallel to the direction of the air flow, mounted on the axes with the possibility of rotation under the influence of a critical change in the speed of the air flow and interacting with the holding device dampers that allow air to flow through the device at speeds less than critical at the same time, the device includes a device for the simultaneous forced closing and opening of the shutters of each row, which has a vertical movable rod connected to the shutters, see Utility Model Patent No. 53402, published May 10, 2006.

This device is the closest in technical essence and the achieved technical result to the proposed solution and is taken as a prototype of the proposed utility model.

Its disadvantage is that it is not reliable enough, since it consists of two interconnected nodes that do not have a common single body. In addition, it is not reliable enough, since it has many autonomous non-removable elements that elastically load the flaps, at least two for each flap. At the same time, this device has inconvenience during operation, expressed in the fact that, if necessary, change the threshold value of the device’s response to block the air channel, it is necessary to change the whole set of autonomous non-removable elements (springs), elastically loading shutters, of which at least two for each damper. It is also inconvenient to conduct a functional test. This is due to the fact that the device is made of two independent modules and each of them needs to be checked separately.

Disclosure of a utility model.

Based on this original observation, the present utility model mainly aims to propose a device for blocking the air ventilation channel, comprising two rows of oppositely directed blocking elements made in the form of dampers, the front edges of which are oriented parallel to the direction of the air flow, mounted on axes with the possibility of rotation under the action of a critical change in air flow rate and interacting with the device to hold the dampers, providing passing through the device air flow at speeds lower than the critical speed, the device includes a device for the simultaneous forced closing and opening of the dampers of each row, which has a vertical movable thrust connected to the dampers, which allows at least to alleviate the above drawback, namely, to ensure improving the reliability of the operation while improving the ease of use, which is the technical task that this useful mod is designed to solve e.

To achieve this goal, both rows of overlapping elements are installed in a single housing made in the form of a metal frame, and all the flaps of one row are pivotally connected to two vertical movable rods of a spring-loaded movable frame with the formation of devices for holding the flaps, while devices for simultaneously closing and opening the flaps of each series are made in the form of stops on moving frames that interact with the working surfaces of the eccentrics, fixed on a common for two x eccentrics shaft.

Thanks to such advantageous characteristics, it becomes possible to increase the reliability of operation due to the implementation of the device in a single housing, and also due to the fact that the device that holds the shutters in the open position and the forced shutter of the shutters are combined in one mechanism, which allows, in contrast to the prototype, to produce simultaneous closing all (both rows) of the device dampers.

Also, in comparison with the prototype, the manufacturability of the device is increased and the process of its assembly and disassembly is simplified by reducing the number of parts of the device. By reducing the number of parts of the device, as a result, its maintenance is also facilitated, the degree of maintainability is increased, which also increases the reliability of the device as a whole.

In addition, in comparison with the prototype, it is possible to tune for a given channel productivity and for a given pressure gradient separately for a shock wave and for a rarefaction wave, which allows to achieve optimal thresholds for the device to operate. This increases the usability of the specified device.

There is an advantageous variant of the utility model, in which the shaft has a removable handle for manual drive.

Thanks to this advantageous characteristic, it becomes possible to simultaneously close all (both rows) of the device shutters by turning one removable handle.

The set of essential features of the proposed utility model is unknown from the prior art for devices of similar purpose, which allows us to conclude that the criterion of "novelty" for the utility model is met.

A brief description of the drawings.

Other distinguishing features and advantages of the utility model clearly follow from the description below for illustration and not being restrictive, with reference to the accompanying drawings, in which:

- figure 1 schematically depicts a vertical section of a device for blocking an air channel, according to a utility model,

- figure 2 schematically depicts a side view of a device for blocking an air channel, according to a utility model,

- figures 3 and 4 schematically depict the position of the shutters of the air channel shutoff device in different operating modes, according to the utility model.

In the figures indicated:

1 - metal frame

2 - horizontal freely rotating axes

3 - butterfly valves

4 - axis of the shutters

5 - vertical thrust

6 - movable frame of the first row of dampers

7 - springs, the force of which holds the flaps at an angle to the air flow and prevents them from turning under the action of the air flow

8 - movable frame of the second row of dampers

9 and 10 - emphasis directed towards each other.

11 - clown

12 - shaft

13 - removable handle

According to figures 1-4, the device for blocking the air ventilation channel contains two rows of oppositely directed overlapping elements made in the form of shutters 3, the front edges of which are oriented parallel to the direction of the air flow, mounted on the axes 4 with the possibility of rotation under the influence of a critical change in the speed of the air flow and interacting with a device for holding the dampers that allows air to pass through the device at speeds lower than the critical speed, wherein the device includes a device for the simultaneous forced closing and opening of the dampers of each row, which has a vertical movable rod 5 connected to the dampers.

Both rows of overlapping elements are installed in a single housing made in the form of a metal frame 1. All shutters of one row are pivotally connected to two vertical movable rods 5 of a spring-loaded movable frame 6 and 8 with the formation of a device for holding the shutters. Devices for simultaneous forced closing and opening of the shutters of each row are made in the form of stops 9 and 10 on the movable frames 6 and 8, which interact with the working surfaces of the eccentrics 11, mounted on a shaft 12 common to the two eccentrics.

The shaft 12 has a removable handle 13 for manual drive

All dampers of the same row through the 4 axis are pivotally connected to two vertical rods 5 of the movable frame 6, spring-loaded with one, two, four or five springs 7, the force of which holds the dampers at an angle to the air flow and prevents their rotation under the action of the air flow up to some critical flow rate, above which the flow pressure can overpower the action of the springs and simultaneously rotate the dampers of one row, blocking the passage section of the device frame. At the same time, the valves of the other row remain in the open position. The value of the critical speed can vary significantly due to changes in the number of installed springs. In this case, the second row dampers work similarly when the flow direction changes to the opposite.

Implementation of a utility model.

The device for blocking the air ventilation duct works as follows.

The device installed in the air channel of the supply or exhaust ventilation system, operates as follows. In normal operation, the air flow freely passes through the channel, flowing around the flaps 3 of both rows, held in the initial (open) position by the efforts of the respective springs 7 (see Fig. 3)

When a shock wave passes through the device in the channel and on the dampers, a pressure gradient arises under the influence of which the dampers 3 of the first row along the wave simultaneously rotate, compressing the springs 7, and block the channel, as shown in Fig. 4.

Following the shock wave, a rarefaction wave passes through the device, creating a reverse pressure gradient in the channel, under the influence of which the channel is blocked by the second row of valves, and the first row of valves opens automatically. When the pressure gradient decreases to less than a predetermined value, the second row flaps open automatically (under the action of springs), after which the air channel can operate in normal mode.

When the roller is rotated by hand by means of a removable handle 13, the eccentrics move both movable frames 6 and 8 downward by pressing on the stops, compressing the springs 7 and turning the shutters 3 of both rows simultaneously to close the channel (see Fig. 3). With the reverse rotation of the handle, all the flaps simultaneously return to their original (open) position under the action of expanding springs 7.

The sequence of steps is approximate and allows you to rearrange, add or perform some operations at the same time without losing the ability to provide all the functions of the proposed device.

Industrial applicability.

The proposed device for blocking the air ventilation channel can be implemented by a specialist in practice and, when implemented, ensures the fulfillment of the declared purpose. The possibility of being implemented by a specialist in practice follows from the fact that for each feature included in the utility model formula based on the description, the material equivalent is known, which allows us to conclude that the criteria for “completeness of disclosure” and “industrial applicability” for the utility model are met.

In accordance with the proposed utility model, the applicant tested the design of the device for blocking the air ventilation duct.

Tests have shown that the device for blocking the air ventilation duct can allow:

- to increase the reliability of the device due to the fact that both mechanisms of the channel overlap (both from the shock wave and from the rarefaction wave) are located in one housing;

- increase the reliability of the device due to the fact that it excludes many autonomous non-removable elements that elastically load the flaps (at least two for each flap), and the elastic loading of all the flaps is done by at least two and no more than ten easily removable springs by means of rods and hinges, which in the prototype serve only to synchronize the rotation of the valves and for manual operation;

- to improve the usability of the device due to the fact that one removable handle 13 can simultaneously close all (both rows) of the device dampers.

Besides:

- increases the manufacturability of the device;

- simplifies the process of its assembly and disassembly by reducing the number of parts of the device;

- facilitates its maintenance;

- increases the degree of maintainability,

- it is possible to tune for a given channel performance and for a given pressure gradient separately for a shock wave and for a rarefaction wave, which allows achieving optimal thresholds for the device to operate.

All this, ultimately, ensures the achievement of the technical result achieved - improving the reliability of the operation while improving the ease of use.

Claims (2)

1. The device for blocking the air ventilation channel, containing two rows of oppositely directed overlapping elements made in the form of dampers, the front edges of which are oriented parallel to the direction of the air flow, mounted on the axes with the possibility of rotation under the influence of a critical change in the speed of the air flow and interacting with the device for holding the dampers, allowing air to flow through the device at speeds lower than the critical speed, while your device includes a device for the simultaneous forced closing and opening of the shutters of each row, which has a vertical movable rod connected to the shutters, characterized in that both rows of overlapping elements are installed in a single housing made in the form of a metal frame, and all shutters of the same row are pivotally connected to two vertical movable rods of a spring-loaded movable frame with the formation of devices for holding the dampers, while devices for simultaneous forced closing yvaniya and opening flaps of each row are formed as stops for the movable part, which interact with the working surfaces of cams fixed on a common shaft of two eccentrics. 2. The device according to claim 1, characterized in that the shaft has a removable handle for manual drive.

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