WO2020215525A1

WO2020215525A1 - Temporary isolation wall with double-layer air bags for closed wind path roadway of underground coal mine

Info

Publication number: WO2020215525A1
Application number: PCT/CN2019/098778
Authority: WO
Inventors: 王刚; 谭波; 程卫民; 刘学麟; 孙路路; 牛会永; 胡相明; 刘志远
Original assignee: 山东科技大学
Priority date: 2019-04-24
Filing date: 2019-08-01
Publication date: 2020-10-29
Also published as: CN110318806A

Abstract

Provided is a temporary isolation wall with double-layer air bags for closed wind path roadway of underground coal mine, and belongs to the technical field of prevention for coal self-combustion in underground coal mines. The temporary isolation wall comprises an air inflation bag body (1), a fixed assembly (3) and an auxiliary fire extinguishment channel (124), the air inflation bag body (1) is a double-layer bag body structure formed by an outer-layer air bag (11) and an inner-layer air bag (12), the shape of the air-inflated air inflation bag body (1) is a columnar structure, the outer-layer air bag (11) is prepared from fireproof EVA foaming cotton (111), the inner-layer air bag (12) is prepared from compact asbestos cloth (121); the fixed assembly (3) comprises a connection rope (13) and a fixed pile (33), an air inflation port (122) is arranged in the central position of the bottom surface of the inner-layer air bag (12), the air inflation port (122) is connected with an air inflation pump (2) through a pipeline, an exhaust valve (126) is arranged at the part adjacent to the air inflation port (122). The isolation wall is simple in structure, convenient to install, efficient and convenient, and capable of saving manpower and material resources.

Description

Double-layer airbag type temporary isolation wall used for closed air road tunnel in coal mine

Technical field

The invention relates to the technical field of preventing and controlling coal spontaneous combustion in coal mines, in particular to a temporary isolation wall used in coal mines.

Background technique

The construction of a temporary firewall is one of the important measures for underground fire prevention and extinguishing, which can cut off the supply of ventilation and oxygen at the fire point and avoid the spread of hazardous gases generated by the fire point.

Among the existing technologies, the technologies and equipment for constructing temporary firewalls mainly include:

Application number 201811225056.1 discloses a coal mine underground fire prevention method, including a gas pressure regulating chamber and a gas monitoring system. The gas pressure regulating chamber is connected through pipelines, and the return air of the coal mine is connected and concentrated to the equalizing chamber; the gas monitoring system Flammable gas detectors and infrared sensors are installed at each monitoring point. An alarm controller is connected near the flammable gas detector, and the alarm controller is connected to the equalizing chamber fan through a wire to control the equalizing chamber fan The alarm controller and infrared sensor are connected to the control computer remotely through wireless communication.

Application No. 200810176846.5 discloses a mine firewall, which includes a firewall body, a fire extinguishing channel, a filling pressure valve and a fire extinguishing pressure valve. The outer layer of the firewall body is PAN-based oxidized fiber cloth coated with heat and heat insulation and fireproof paint. For the spliced polyurethane filling capsule, the fire extinguishing channel is in the middle and upper part of the firewall body, the filling pressure valve is connected with the filling capsule, and the fire extinguishing pressure valve is connected with the fire extinguishing pipeline.

The above-mentioned prior art has two common points, namely, the construction time is long, the construction of a temporary firewall often requires a large amount of materials such as wood, stone and concrete, and requires a lot of manpower, labor intensity, manpower and material mobilization, and the construction of the firewall consumes a lot of money. time. It is a one-time facility and it is difficult to dismantle. When the fire is extinguished, the indicators are normal. The temporary firewall needs to be dismantled, but dismantling requires the use of large equipment, which is quite difficult and generates a lot of garbage. Therefore, there is an urgent need for a temporary fire wall that can close the wind tunnel in a short time and save time and effort to recycle to improve the efficiency of underground fire fighting.

Summary of the invention

technical problem

The solution to the problem

Technical solutions

The purpose of the present invention is to provide a double-layer airbag type temporary isolation wall for closed air passages in coal mines, which has simple structure, convenient installation, high efficiency and convenience, and saves manpower and material resources.

Its technical solutions include:

A double-layer airbag type temporary isolation wall for closed air tunnels in coal mines, which comprises an inflatable bag body, a fixing assembly and an auxiliary fire extinguishing channel. The inflatable bag body is formed by an outer layer air bag and an inner layer air bag. Double-layer airbag structure, when inflated, the shape of the inflatable airbag body is a columnar structure, the outer airbag is made of fireproof EVA foamed cotton, and the inner airbag is made of dense asbestos cloth. to make;

The fixing assembly includes a connecting rope and a fixing pile, the connecting rope is fixed between the outer layer airbag and the inner layer airbag, and the connecting rope is located between the outer layer airbag and the inner layer airbag There are several evenly distributed around the annular cavity formed between the outer layer air bag and the inner layer air bag at the top surface position; the fixing posts are located near the inflatable bag body and are used to fix the inflatable bag body;

An inflation port is provided at the center of the bottom surface of the inner layer airbag, the inflation port is connected with an inflator through a pipeline, and the top surface of the inner layer airbag opposite to the inflation port is provided with A gas pipeline for inputting gas in the outer airbag, the gas pipeline is provided with a one-way valve for inflating the outer airbag from the inner airbag to the outer airbag, and an exhaust valve is provided adjacent to the inflation port;

The auxiliary fire extinguishing channel is arranged under the exhaust valve, and after the inflation bag body is inflated, the auxiliary fire extinguishing channel is located at the lowermost end.

The beneficial technical effects directly brought about by the above technical solutions are:

The use of a double-layer airbag structure makes the separation wall more stable and has a higher safety factor. If accidental rupture occurs, it will not generate excessive gas shock waves. Because the outer airbag adopts a circular structure and high elastic fireproof EVA foam cotton, it is outside the roadway The shape of the layer airbag has deformation space, which can fit the shape of the roadway as much as possible to reduce the gap between the roadway and the roadway. On the other hand, the outer layer airbag is wrapped with fleece fireproof cotton, which can better play the role of fire prevention while further reducing The gap between the roadway wall and the roadway wall increases the friction with the roadway wall and is not easy to slip. Because the inner and outer airbags are equipped with connecting ropes, which are fixed to each other, it can avoid the misalignment of the inner and outer airbags, the dislocation and knotting when inflating quality prevention, and ensure the reliability of the equipment. The auxiliary fire extinguishing channel is to provide a channel for nitrogen injection and water injection to extinguish Provide a window for later judgment of the fire situation in the enclosed area.

As a preferred solution of the present invention, the top surface of the outer layer airbag and the top surface of the inner layer airbag share the same center, and the outer layer airbag is 30m long after being inflated with a radius of 3m; the inner layer airbag is long after being inflated 29m, radius 2.5m.

As another preferred solution of the present invention, a fixing ring is arranged around the circular end surface of the outer airbag, and the fixing ring is connected to the fixing pile by a fixing rope.

Further, there are six fixed rings mentioned above.

Further, the above-mentioned air pump is provided with a multifunctional interface, and the above-mentioned multifunctional interface is connected to the nitrogen generating device.

Further, a fixed thread is provided at the above-mentioned inflation port, and the pipeline connected with the inflator is connected to the inflation port through the fixed thread.

Further, the auxiliary fire extinguishing channel is assisted by water injection and nitrogen injection, and the auxiliary fire extinguishing channel is blocked by a fire plug after the water injection and nitrogen injection.

In the above technical solution, since the inflator can be connected to the nitrogen generator, nitrogen can be injected into the airbag. This is because when the fire is more serious, the injection of nitrogen can better buy time for escape.

The beneficial effects of the invention

Beneficial effect

Compared with the prior art, the present invention brings the following beneficial technical effects:

(1) The operation is simple, convenient and fast. Each person can build a separation wall within 30 minutes, which can win precious time for fire fighting and rescue.

(2) In response to different fires, the present invention can adapt to different fire extinguishing schemes and cooperate with different fire extinguishing methods to achieve the best fire extinguishing effect.

(3) It can be recycled quickly. After the fire is extinguished, the product can be recycled within 30 minutes per person and can be reused.

Brief description of the drawings

Description of the drawings

The present invention will be further explained below in conjunction with the drawings:

Figure 1 is a bottom view of the separation wall of the present invention;

Figure 2 is a vertical sectional view of the inflated state of the separation wall of the present invention;

Figure 3 is a schematic diagram of the working state of the separation wall of the present invention;

In the picture, 1. Inflatable bladder body, 2. Multifunctional inflator, 3. Fixing components, 11, Outer air bag, 111, Foamed cotton, 112, Fleece-like fireproof cotton, 113, Outer air bag groove, 12. Layer airbag, 13, connecting rope, 121, asbestos cloth, 122, inflation port, 123, one-way valve, 124, auxiliary fire extinguishing channel, 125, fire plug, 126, exhaust valve, 21, air pump inlet, 22 , Air outlet, 23, supporting pipe, 31, fixed ring, 32, fixed rope, 33, fixed pile.

Invention embodiment

Embodiments of the invention

The present invention proposes a double-layer airbag temporary isolation wall for closed air passages in coal mines. In order to make the advantages and technical solutions of the present invention clearer and clearer, the present invention will be described in detail below with reference to specific embodiments.

With reference to Figures 1 to 3, the present invention is a double-layer airbag type temporary isolation wall used for closed air passages in underground coal mines. It includes an inflatable bladder body 1, a fixing assembly 3, and an auxiliary fire extinguishing channel 124. The double-layer airbag structure formed by the outer airbag 11 and the inner airbag 12 adopts the double-layer airbag structure, which makes the firewall more stable and has a higher safety factor. If accidental rupture occurs, it will not generate excessive gas shock waves; The shape of the rear inflatable bladder body 1 is a columnar structure. The outer layer of the bladder is made of fireproof EVA foamed cotton 111. After inflation, it is cylindrical with a length of 30m and a radius of 3m. The inside is connected by a connecting rope with a length of 50cm set every 1m. 13 is connected to the outer side of the inner airbag 12, and the connecting rope fixes the outer airbag and the inner airbag to each other, which can avoid the misalignment of the inner and outer airbags, prevent the misalignment and knotting when inflating the quality, and ensure the reliability of the equipment.

The outer side of the airbag is covered with fleece fireproof cotton 112. Because the outer airbag adopts a circular structure and high-elasticity fireproof EVA foam cotton, the shape of the outer airbag of the roadway has deformation space, which can fit the shape of the roadway as much as possible to reduce the gap between the roadway and the roadway. The gap, on the other hand, the use of fleece fireproof cotton 112 to wrap the outer airbag can better play a fire protection effect, while further reducing the gap with the roadway wall, increasing the friction with the roadway wall, and not easy to slip Shift, there is an outer airbag groove 113 at the center. The inner airbag 12 is made of dense asbestos cloth 121. After inflating, it has a length of 29m and a radius of 2.5m. The outside is connected to the inner side of the outer airbag by a connecting rope of 50cm in length; the fixing assembly includes the above connecting rope and fixing piles. 33. The connecting rope 13 is fixed between the outer layer airbag and the inner layer airbag, and the connecting rope is located on the top surface between the outer layer airbag 11 and the inner layer airbag 12, around the ring formed between the outer layer airbag and the inner layer airbag There are a number of uniformly distributed cavities, preferably 8-16; the fixed pile 33 is located near the inflatable bag body, a fixed ring 31 is arranged around the circular end surface of the outer air bag, and the fixed ring is fixed with a fixed rope 32. The piles 33 are connected together.

Further, there are six fixed rings described above to enhance the stability of the inflatable balloon body. An inflation port 122 is provided at the center of the bottom surface of the inner airbag. The inflation port is provided at the center of the circular surface of the inner airbag. The inflation port is provided with a fixed thread connected to the pipeline connected to the air outlet 22 of the inflator. A multifunctional inflator 2 is connected to the interface and pipeline. A one-way valve 123 is provided at the center of another circular plane of the inner airbag opposite to the inflation port to inflate from the inner airbag to the outer airbag. An exhaust valve 126 is provided adjacent to

The auxiliary fire extinguishing channel 124 is arranged under the exhaust valve, and when the inflatable bag body is inflated, the auxiliary fire extinguishing channel is located at the lowest end. Auxiliary fire extinguishing passage openings are arranged on the upper and lower circular surfaces of the inflatable bag body. Between the inner and outer air bags, the length is 30m and runs through the entire isolation wall. The fire plug 125 is made of fireproof material to close the auxiliary fire extinguishing passage 124. .

The air inlet 21 of the inflator is equipped with a multifunctional interface, which can be connected to the nitrogen generator, and the air outlet 22 is connected to the air inlet 122 through a matching pipe 23. Nitrogen can be injected into the airbag. This is when the fire is more serious. Good to buy time to escape.

The general working method of the double-layer airbag type temporary isolation wall of the present invention is:

When working, at a distance of 100m from the ignition position, after removing the debris in the roadway, spread the uninflated bladder along the roadway in the roadway, with the non-inflating end facing the ignition position, and the air outlet of the inflatable pump to inflate through the pipe During the inflation process, adjust the position of the airbag so that the auxiliary fire extinguishing channel is at the lower end. After the position is adjusted, drive the fixed piles around the roadway to fix the position of the airbag until the outer airbag is in precise contact with the inner wall of the roadway, and the airbag is inflated complete.

When a fire occurs somewhere underground, the rescue team can quickly carry the isolation wall of the present invention, and inflate the air intake and return air tunnels at the fire location respectively to block the air flow in the tunnel, cut off the ventilation and oxygen supply at the fire point, and prevent the spread of harmful gases from the fire point. After the rescue is completed, it can be recovered by deflation. The isolation wall of the present invention can also be combined with various fire extinguishing methods such as nitrogen injection and water injection to meet various fire extinguishing needs.

The parts not mentioned in the present invention can be realized by referring to the prior art.

It should be noted that any equivalent manners or obvious modifications made by those skilled in the art under the teaching of this specification should fall within the protection scope of the present invention.

Claims

A double-layer airbag type temporary isolation wall used for closed air passages in coal mines, which includes an inflatable bag body, a fixed assembly and an auxiliary fire extinguishing channel, and is characterized in:

The inflatable bag body is a double-layered bag body structure formed by the outer layer air bag and the inner layer air bag. When inflated, the shape of the inflatable bag body is a columnar structure, and the outer layer air bag is made of fireproof EVA foam Is made of cotton, and the inner airbag is made of dense asbestos cloth;

The fixing assembly includes a connecting rope and a fixing pile, the connecting rope is fixed between the outer layer airbag and the inner layer airbag, and the connecting rope is located between the outer layer airbag and the inner layer airbag There are several evenly distributed around the annular cavity formed between the outer layer air bag and the inner layer air bag at the top surface position; the fixing posts are located near the inflatable bag body and are used to fix the inflatable bag body;

An inflation port is provided at the center of the bottom surface of the inner layer airbag, the inflation port is connected with an inflator through a pipeline, and the top surface of the inner layer airbag opposite to the inflation port is provided with A gas pipeline for inputting gas in the outer airbag, the gas pipeline is provided with a one-way valve for inflating the outer airbag from the inner airbag to the outer airbag, and an exhaust valve is provided adjacent to the inflation port;

The auxiliary fire extinguishing channel is arranged under the exhaust valve, and after the inflation bag body is inflated, the auxiliary fire extinguishing channel is located at the lowermost end.
According to claim 1, a double-layer airbag type temporary isolation wall for closed air tunnels in coal mines, wherein the top surface of the outer airbag and the top surface of the inner airbag are shared It has a center, and the outer airbag is 30m long and has a radius of 3m after being inflated; the inner airbag is 29m long and has a radius of 2.5m after being inflated.
According to claim 2, a double-layer airbag type temporary isolation wall for closed air tunnels in coal mines is characterized in that: a fixed ring is provided around the circular end surface of the outer airbag, and The fixed ring is connected with the fixed pile through a fixed rope.
According to claim 3, a double-layer airbag type temporary isolation wall for closed air passages in underground coal mines is characterized in that there are six fixed rings.
According to claim 4, a double-layer airbag type temporary isolation wall for closed wind tunnels in coal mines, wherein the air pump is provided with a multifunctional interface, and the multifunctional interface is connected with a system Nitrogen device.
According to claim 5, a double-layer airbag type temporary isolation wall for closed air tunnels in underground coal mines is characterized in that: the air inlet is provided with a fixed thread, and the pipeline connected with the air pump is fixed through The thread is connected to the inflation port.
According to claim 6, a double-layer airbag type temporary isolation wall for closed air passages in coal mines, characterized in that: the auxiliary fire extinguishing channel assists fire extinguishing by means of water injection and nitrogen injection, and water injection and injection After nitrogen, the auxiliary fire extinguishing channel is blocked by a fire plug.