CN112402843B

CN112402843B - Fire retardant device for ventilation system

Info

Publication number: CN112402843B
Application number: CN201910783221.3A
Authority: CN
Inventors: 付福来
Original assignee: Jiangsu Aiweite Ship Equipment Co ltd
Current assignee: JIANGSU AIWEITE SHIP EQUIPMENT Co.,Ltd.
Priority date: 2019-08-23
Filing date: 2019-08-23
Publication date: 2022-02-01
Anticipated expiration: 2039-08-23
Also published as: CN112402843A

Abstract

The invention relates to the technical field of ventilation equipment, and discloses a fire retardant device for a ventilation system. This back-fire relief device for ventilation system, under the cooling effect and the isolation of the nitrogen gas of cooling gas pitcher release, the continuous back-fire relief time and the back-fire relief number of times of this back-fire relief device have been prolonged by a wide margin, longer back-fire relief effect has reduced the probability of conflagration outbreak on the one hand, secondly, the position control of adjusting a section of thick bamboo has prolonged the passageway of quenching and has hindered flame transmission speed, the temperature that loses of flame has aggravated to the nitrogen gas of instantaneous injection communicating pipe, the back-fire relief efficiency of this back-fire relief device has been improved, the regulation section of thick bamboo of activity has simultaneously improved and has prevented stifled ability, it is less to gaseous hindrance effect behind back-fire relief unit withdrawal unit passageway, the design degree of difficulty and material requirement have been reduced.

Description

Fire retardant device for ventilation system

Technical Field

The invention relates to the technical field of ventilation equipment, in particular to a fire retardant device for a ventilation system.

Background

When one end of the pipeline filled with combustible gas is ignited, flame propagates along the pipe wall to the direction of unburned gas, the movement of the flame surface has an acceleration process, and if the propagation of flame is inhibited in the early stage of the low-speed propagation of flame, the flame can be blocked, so that the combustible gas space communicated with the pipeline is protected.

Referring to fig. 1, a conventional fire retardant device is provided, which divides a pipe section into a plurality of unit channels, on one hand, a heat dissipation area is increased, when a flame passes through the unit channels, a large amount of heat loss is generated, which causes temperature drop and helps to extinguish the flame, on the other hand, a small channel contains less free radicals and reaction molecules, which reduces a reaction speed and inhibits a combustion reaction, and the two aspects act together to inhibit the transmission of the flame.

Generally speaking, the smaller the diameter of the unit channel in the fire retardant device is, the longer the length is, the better the fire retardant effect is, but in practical application, the ventilation effect and the anti-blocking effect need to be considered, the development of the fire retardant capability of the fire retardant device is restricted, the design difficulty and the material requirement of the fire retardant device are increased by comprehensively considering the fire retardant capability, the flow resistance loss and the anti-blocking capability, and the use cost is increased.

Disclosure of Invention

Aiming at the defects of the background technology, the invention provides the fire retardant device for the ventilation system, which has the advantage of good fire retardant effect and solves the problems in the background technology.

The invention provides the following technical scheme: the utility model provides a fire relief device for ventilation system, includes the casing, the inner wall fixed mounting of casing has the back-fire relief unit of a plurality of ranges of level, the back-fire relief unit is even to be equipped with the unit hole, the upper end fixedly connected with connecting block of casing, connecting block swing joint has the slide bar, slide bar fixedly connected with strikes the lid, strike the middle part fixedly connected with communicating pipe of lid, the upper end intercommunication of communicating pipe has the cooling gas pitcher, the lower extreme and the back-fire relief unit activity of communicating pipe cup joint, the lateral wall of communicating pipe is equipped with the gas pocket, and the gas pocket aims at the clearance between the two-layer back-fire relief unit, the middle part fixedly connected with connecting plate of communicating pipe, the lower extreme fixedly connected with of connecting plate adjusts a section of thick bamboo.

Preferably, the impact cap is umbrella-shaped.

Preferably, liquid nitrogen is filled in the cooling gas tank.

Preferably, be equipped with the control between communicating pipe and the cooling gas pitcher, the control passes through the pin joint of pin and cooling gas pitcher, the pin is high temperature yielding material, the lower extreme of control blocks through the shutoff board, the material of shutoff board is shape memory alloy.

Preferably, adjust a section of thick bamboo and include extension pipe, connecting rod and piston, the top the extension pipe and connecting plate fixed connection, two through connecting rod fixed connection between the extension pipe, the shape of connecting rod be with the flat shape of extension pipe adaptation, the lower extreme of extension pipe is equipped with the piston.

The invention has the following beneficial effects:

1. this back-fire relief device for ventilation system, under the cooling effect and the isolation of the nitrogen gas of cooling gas pitcher release, prolonged this back-fire relief device's continuous back-fire relief time and back-fire relief number of times by a wide margin, longer back-fire relief effect has reduced the probability of conflagration outbreak on the one hand, and on the other hand gives the reaction time of staff discovery and handling accident, and then has improved safety control's quality.

2. This back-fire relief device for ventilation system, the position control of adjusting a section of thick bamboo has prolonged the quenching passageway and has hindered flame transmission speed, the nitrogen gas of instantaneous injection has aggravated the temperature loss of flame communicating pipe, the back-fire relief efficiency of this back-fire relief device has been improved, the regulation section of thick bamboo of activity has simultaneously improved and has prevented stifled ability, it is less to gaseous hindrance effect behind back-fire relief unit withdrawal unit passageway, consequently, it is more free when designer's balance accepts and accepts this back-fire relief device attribute, the design degree of difficulty and material requirement have been reduced, and then use cost is reduced.

Drawings

FIG. 1 is a schematic diagram of a prior art configuration of the present invention;

FIG. 2 is a schematic structural view of the present invention in a firestopped state;

FIG. 3 is a schematic structural diagram of the present invention in an initial state;

FIG. 4 is a schematic view of an adjustment barrel of the present invention;

FIG. 5 is a schematic view of a control member of the present invention;

FIG. 6 is a schematic view of the gas flow between two fire stop units when the present invention is fire stopped.

In the figure: 1. a housing; 2. a fire retardant unit; 3. connecting blocks; 4. an impact cap; 5. a slide bar; 6. a cooling gas tank; 7. a communicating pipe; 8. a connecting plate; 9. an adjusting cylinder; 91. an extension tube; 92. a connecting rod; 93. a piston; 10. a control member; 11. a pin; 12. a plugging plate.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 2-6, a fire retardant device for a ventilation system comprises a housing 1, a plurality of fire retardant units 2 horizontally arranged are fixedly mounted on the inner wall of the housing 1, the fire retardant units 2 are uniformly provided with unit holes, the upper end of the housing 1 is fixedly connected with a connecting block 3, the connecting block 3 is movably connected with a slide bar 5, the slide bar 5 is fixedly connected with an impact cover 4, a reset spring is fixedly sleeved between the slide bar 5 and the connecting block 3, the impact cover 4 can reciprocate with the connecting block 3 through the slide bar 5, the middle part of the impact cover 4 is fixedly connected with a communicating pipe 7, the upper end of the communicating pipe 7 is communicated with a cooling gas tank 6, the lower end of the communicating pipe 7 is movably sleeved with the fire retardant units 2, the outer side wall of the communicating pipe 7 is provided with a gas hole, the gas hole is aligned with the gap between the two layers of fire retardant units 2, the cooling gas tank 6 outputs cooling gas through the gas hole on the communicating pipe 7 to cool the fire retardant units 2, further promote the temperature loss of flame among the back-fire relief unit 2, the middle part fixedly connected with connecting plate 8 of communicating pipe 7, the lower extreme fixedly connected with of connecting plate 8 adjusts a section of thick bamboo 9, drives connecting plate 8 and adjusts a section of thick bamboo 9 and remove when communicating pipe 7 removes, adjusts a section of thick bamboo 9 and removes the effective length that has increased the unit passageway in back-fire relief unit 2 on the one hand, has improved instantaneous flame-out effect, can also clean the tip pass of back-fire relief unit 2 simultaneously, reduces and blocks up.

Wherein, strike lid 4 and be the umbrella-type, when instantaneous detonation takes place, absorb gaseous inflation and shock wave, impel to strike lid 4 and upwards remove, and then drive and adjust a section of thick bamboo 9 and remove, prolong the unit passageway, improve instantaneous back-fire relief effect.

Wherein, 6 intussuseptions of cooling gas pitcher are the liquid nitrogen, and the gasified cooling of liquid nitrogen is effectual, simultaneously because nitrogen gas density is less, upward movement can play the effect of blowing out flame, and the nitrogen gas gathering is being strikeed 4 lower extremes simultaneously, forms a nitrogen gas layer, further completely cuts off inflammable gas and flame, and extension back-fire relief time improves the back-fire relief effect.

Wherein, be equipped with control 10 between communicating pipe 7 and the cooling gas pitcher 6, control 10 is through

11 and 6 pin joints of cooling gas pitcher, pin 11 is high temperature yielding material, under the combustion environment of longer time, the ability of fixed control 10 is lost in the deformation of pin 11, control 10 removes under the atmospheric pressure effect, a large amount of nitrogen gas gets into and improves the temperature that reduces back-fire relief unit 2 department in communicating pipe 7, improve back-fire relief effect of back-fire relief unit 2, the lower extreme of control 10 carries out the shutoff through shutoff board 12, the material of shutoff board 12 is shape memory alloy, shutoff board 12 is heated deformation short-term release gas, carry out instantaneous cooling to back-fire relief unit 2, improve instantaneous cooling effect.

Wherein, it includes extension pipe 91 to adjust section of thick bamboo 9, connecting rod 92 and piston 93, extension pipe 91 and the 8 fixed connection of connecting plate of top, through connecting rod 92 fixed connection between two extension pipes 91, connecting rod 92's shape is for the platykurtic with extension pipe 91 adaptation, make the multilayer extension pipe 91 synchronous motion through connecting rod 92, the lower extreme of extension pipe 91 is equipped with

piston

93, 2 inner walls of back-fire relief unit can be cleared up with the 2 piston motions of back-fire relief unit to piston 93, it is outstanding to seal the unit passageway that makes extension pipe 91 and back-fire relief unit 2 constitute simultaneously, make the gaseous looper after the clearance diffusion between two back-fire relief units 2 of burning, final direction of motion is opposite with the flame direction, further flame transmission speed has been hindered, the back-fire relief effect is improved.

The working principle of the invention is as follows:

instant fire-retardant reaction

When gas is instantaneously ignited by an external fire source, the shock wave and the expansion impact of gas deflagration impact the lid 4, make the impact lid 4 upwards move, impact the lid 4 and remove and drive communicating pipe 7, connecting plate 8 and adjusting cylinder 9 remove, make the unit passageway stack of adjusting cylinder 9 and back-fire relief unit 2, quench length has been increased, the back-fire relief effect has been improved, instantaneous high temperature has changed the shape of shutoff board 12 simultaneously, shutoff board 12 short-term release nitrogen gas and realize the shutoff again under the effect of nitrogen gas cooling fast reconversion, short-term exhaust nitrogen gas gets into the clearance between two back-fire relief units 2 through communicating pipe 7, cool down back-fire relief unit 2, meanwhile, outstanding gas in clearance is circled and the final flame direction flows back to back-fire relief unit 2's unit passageway in adjusting cylinder 9 of back-fire relief unit 2, hinder flame transmission speed.

Longer time of fire retardant reaction

The combustible gas is lighted in succession of a section longer time, the bulk temperature that makes the back-fire relief device improves, 11 high temperature deformations of pin, control 10 slides a large amount of release nitrogen gas, through 7 flow direction back-fire relief units 2 of communicating pipe cool down back-fire relief units 2, make back-fire relief units 2 resume reasonable temperature, between combustible gas is lighted once more, a large amount of gas is because the lower extreme of impact lid 4 is being gathered in the density relation, isolated combustible gas and fire source make this back-fire relief device in longer one end time the fire effect can guarantee.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a fire relief device for ventilation system, includes casing (1), the inner wall fixed mounting of casing (1) has back-fire relief unit (2) of a plurality of ranges of level, back-fire relief unit (2) are even is equipped with unit hole, its characterized in that: the upper end of the shell (1) is fixedly connected with a connecting block (3), the connecting block (3) is movably connected with a sliding rod (5), the sliding rod (5) is fixedly connected with an impact cover (4), the middle part of the impact cover (4) is fixedly connected with a communicating pipe (7), the upper end of the communicating pipe (7) is communicated with a cooling gas tank (6), the lower end of the communicating pipe (7) is movably sleeved with the fire retardant unit (2), the outer side wall of the communicating pipe (7) is provided with a gas hole, the gas hole is aligned to a gap between the two layers of fire retardant units (2), the middle part of the communicating pipe (7) is fixedly connected with a connecting plate (8), and the lower end of the connecting plate (8) is fixedly connected with an adjusting cylinder (9);

a control piece (10) is arranged between the communicating pipe (7) and the cooling gas tank (6), the control piece (10) is in pin joint with the cooling gas tank (6) through a pin (11), the pin (11) is made of a high-temperature deformable material, the lower end of the control piece (10) is plugged through a plugging plate (12), and the plugging plate (12) is made of shape memory alloy;

adjust a section of thick bamboo (9) including extension pipe (91), connecting rod (92) and piston (93), the top extension pipe (91) and connecting plate (8) fixed connection, two pass through connecting rod (92) fixed connection between extension pipe (91), the shape of connecting rod (92) is the platykurtic with extension pipe (91) adaptation, the lower extreme of extension pipe (91) is equipped with piston (93).

2. A fire stopping device for a ventilation system as claimed in claim 1, wherein: the impact cover (4) is umbrella-shaped.

3. A fire stopping device for a ventilation system as claimed in claim 1, wherein: liquid nitrogen is filled in the cooling gas tank (6).