Foam rubber generating air bag and mining rapid sealing air bag

Abstract

The invention relates to a foam rubber generating air bag which comprises an external air chamber, a first air chamber and a second air chamber are arranged in the external air chamber, and the first air chamber and the second air chamber are in one-way communication with the inner surface of the external air chamber through a first one-way air valve and a second one-way air valve respectively. The first gas chamber and the second gas chamber are respectively filled with a first reactant and a second reactant, external pressure gas respectively enters the first gas chamber and the second gas chamber through the first one-way gas valve and the second one-way gas valve and bursts the first gas chamber and the second gas chamber, and the reactants in the first gas chamber and the second gas chamber are rapidly mixed to generate foam glue; foam glue generated after the third fracture line on the surface of the external air chamber is expanded and cracked overflows; the invention further provides a mining rapid sealing air bag, the periphery of the mining rapid sealing air bag is connected with a foam rubber generation air bag in an attached mode, and a gap between the tunnel and the mining rapid sealing air bag can be rapidly blocked through the generated foam rubber; the device has the advantages of low cost, portability, high sealing speed and the like.

Description

[0001] The invention belongs to the technical field of coal mining, and in particular relates to a foam glue generating air bag and a mine-used rapid sealing air bag. Background Art

[0002] As the depth of coal mining increases, the gas content of coal seams and the amount of gas outburst in mines will increase, and the danger of coal and gas outbursts will also increase, thereby increasing the difficulty of governance. In existing mining, by stacking and stacking mining gas stacks and filling the mining gas stacks with gas to expand the air bags, the ventilation conditions in the upper corners can be improved, gas outbursts in the goaf can be prevented, and the gas can be more easily extracted by the extraction system. At present, mining gas stacks are mostly stacked after artificial inflation. Gaps will appear at the corners of mining gas stacks, and the speed of artificial inflation is slow, which affects the stacking and blocking time. At the same time, there are still gaps between the saturated air bags and the top and side walls of the tunnel, and it is impossible to completely prevent gas leakage.

[0003] In the prior art, a "gas rapid inflation airbag device for coal mine safety" with publication number "CN221442649U" can improve the sealing between the inflatable airbags when multiple mining inflatable airbags are used in combination, and improve the interception and blocking effect of the device on gas, through the middle gap filling airbags that are detachably connected between adjacent mining inflatable airbags. However, it requires the use of multiple inflatable airbags and middle gap filling airbags to be inflated one by one and then spliced ​​and stacked to complete the tunnel surface blocking, which is time-consuming, and the gap between the inner wall of the tunnel and the adjacent inflatable airbags cannot be blocked, and the problem of gas leakage still exists. Summary of the invention

[0004] In order to overcome the shortcomings of the above-mentioned prior art, the purpose of the present invention is to provide a foam glue generating air bag, after the first air chamber and the second air chamber are expanded by external air pressure, the raw materials filled therein respectively react quickly to generate foam glue, and the foam glue will eventually overflow through the rupture of the external air chamber and gradually solidify, so as to achieve the effect of quickly filling and sealing the target gap; the mining rapid sealing air bag equipped with the foam glue generating air bag can use the rapidly generated foam glue to fill the gap between the air bag and the tunnel surface. The present invention has the advantages of low cost, easy portability, fast sealing speed, etc., and has a good application prospect.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is:

[0006] A foam glue generating air bag comprises an external air chamber 1, wherein a first air chamber 2 and a second air chamber 3 are arranged inside the external air chamber 1, the first air chamber 2 and the second air chamber 3 are connected to the external air chamber 1 and the outside in one direction through a first one-way air valve 4 and a second one-way air valve 5 respectively, and the external pressurized gas of the external air chamber 1 enters the first air chamber 2 and the second air chamber 3 respectively through the first one-way air valve 4 and the second one-way air valve 5; the first air chamber 2 and the second air chamber 3 are filled with a first reactant and a second reactant respectively, and the first reactant and the second reactant react to generate foam glue after mixing and contacting.

[0007] Furthermore, the first air chamber 2 and the second air chamber 3 are respectively provided with a first rupture line 6 and a second rupture line 7 on the surface away from the first one-way air valve 4 and the second one-way air valve 5, and the thickness of the airbag at the first rupture line 6 and the second rupture line 7 is 10%-80% of the thickness of the airbag at other positions of the first air chamber 2 and the second air chamber 3.

[0008] Furthermore, a third rupture line 8 is provided on the surface of the external air chamber 1 away from the first one-way air valve 4 or the second one-way air valve 5 , and the thickness of the airbag at the third rupture line 8 is 10%-80% of the thickness of the airbag at other positions of the external air chamber 1 .

[0009] Furthermore, the first air chamber 2 , the second air chamber 3 and the external air chamber 1 are all made of polyvinyl chloride (PVC).

[0010] Furthermore, the first one-way air valve 4 and the second one-way air valve 5 are located on the same side of the external air chamber 1 .

[0011] Furthermore, the first reactant comprises isocyanate, the second reactant comprises polyol, and the mass ratio of the isocyanate to the polyol is 1:0.8 to 1:1.3.

[0012] A quick-sealing airbag for mining comprises an inflatable stack 9, the outer periphery of which is connected with a foam rubber to produce an airbag, and the inflatable stack 9 is unidirectionally connected with the first air chamber 2 and the second air chamber 3 through the first one-way air valve 4 and the second one-way air valve 5 respectively.

[0013] The external air chamber 1 is connected to the inflatable stack 9 by hot-melt bonding, and the inflatable stack 9 is made of flame-retardant and fireproof material.

[0014] The foam glue generates air bags which are closely connected to the inflatable pile 9 in a single or beaded manner.

[0015] The outer surface of the mining quick-sealing airbag that contacts the ground after being filled with air is bonded and connected with an elastic gasket 10 .

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. In the present invention, the first air chamber 2 and the second air chamber 3 are connected to the external gas through the first one-way air valve 4 and the second one-way air valve 5 respectively. When the external gas is pressurized, the gas enters the first air chamber 2 and the second air chamber 3 through the first one-way air valve 4 and the second one-way air valve 5 respectively and stretches them open. The raw materials inside the first air chamber 2 and the second air chamber 3 are mixed and reacted to quickly produce foam glue. The external gas continues to fill the external air chamber 1 until the third rupture line 8 is stretched open. The generated foam glue is sprayed or overflows to the outside through the rupture site. The foam glue is quickly generated and overflows, and can be well used for filling the target position.

[0018] 2. The quick-sealing airbag for mining in the present invention can be quickly inflated and propped up manually or automatically, and the foam glue attached to its outer surface can be used to produce an airbag through the action of air pressure, so that the foam glue can quickly overflow from the airbag, thereby quickly filling the gap between the quick-sealing airbag for mining and the tunnel surface. At the same time, the foam glue can gradually solidify within 10 minutes, and fix the quick-sealing airbag for mining to the inner surface of the tunnel while blocking the gap, thereby enhancing the supporting stability of the quick-sealing airbag for mining. In actual use, it is only necessary to inflate the inflatable stack, and no manual operation is required subsequently, which is convenient for human evacuation and gas blocking in emergency situations in tunnels such as coal mines.

[0019] In summary, the mine-used quick-sealing airbag can quickly and automatically inflate to seal the hole where the gas leaks, and use the generated foam glue to automatically seal the gap and fix the mine-used quick-sealing airbag. It has the advantages of low cost, easy portability, fast sealing speed, etc., and has a good application prospect. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a cross-sectional diagram of the air bag generated by the foam rubber after inflation.

[0021] Figure 2 This is a schematic cross-sectional view of the mine-use quick-sealing airbag under tunnel usage conditions after inflation.

[0022] Figure numerals: 1. external air chamber; 2. first air chamber; 3. second air chamber; 4. first one-way air valve; 5. second one-way air valve; 6. first rupture line; 7. second rupture line; 8. third rupture line; 9. inflatable pile; 10. elastic gasket; 11. through hole; 12. tunnel. DETAILED DESCRIPTION

[0023] The following will be combined Figure 1 , Figure 2 The present invention is further described in detail, but the embodiments of the present invention are not limited thereto.

[0024] See also Figure 1A foam rubber airbag comprises an external air chamber 1, wherein the external air chamber 1 is provided with a first air chamber 2 and a second air chamber 3, wherein the first air chamber 2 and the second air chamber 3 are connected to the external air chamber 1 and the outside in one direction through a first one-way air valve 4 and a second one-way air valve 5 respectively, wherein the first one-way air valve 4 or the second one-way air valve 5 can be located at an overlapping portion of the first air chamber 2 or the second air chamber 3 and the external air chamber 1, and an air inlet of the first one-way air valve 4 or the second one-way air valve 5 is in direct contact with the outside, i.e., the first air chamber 2 and the second air chamber 3 are connected to the external air chamber 1 and the outside in one direction through the first one-way air valve 4 and the second one-way air valve 5 respectively. The air inlet nozzle is attached to and connected with the external air chamber 1 and the outside world. In actual implementation, the first one-way air valve 4, the second one-way air valve 5 and the external air chamber 1 are sealed and connected by heat fusion, and the air inlet nozzles of the first one-way air valve 4 and the second one-way air valve 5 are exposed outside the external air chamber 1. The air flow direction of the first one-way air valve 4 or the second one-way air valve 5 is from the outside to enter the first air chamber 2 or the second air chamber 3. Under the condition of external gas pressure in the external air chamber 1, the external pressurized gas can directly enter the first air chamber 2 and the second air chamber 3 through the air inlet nozzles of the first one-way air valve 4 and the second one-way air valve 5 respectively.

[0025] The first one-way air valve 4 and the second one-way air valve 5 are elastic air valves made of organic materials, which can be deformed under the pressure of external gas, thereby opening the valve to allow gas to pass through. When the gas tries to flow in from the opposite direction, the one-way air valve will remain closed due to the pressure difference to prevent the backflow of gas; the first air chamber 2 and the second air chamber 3 are filled with the first reactant and the second reactant respectively, and the first reactant and the second reactant are mixed and contacted and reacted to generate foam glue under the condition of continuous influx of air; in actual production, the reactant raw materials are added to the first air chamber 2 and the second air chamber 3 in proportion in advance and sealed by the first one-way air valve 4 and the second one-way air valve 5.

[0026] Furthermore, the first air chamber 2 and the second air chamber 3 are respectively provided with a first rupture line 6 and a second rupture line 7 on surfaces away from the first one-way air valve 4 and the second one-way air valve 5, the thickness of the airbag at the first rupture line 6 and the second rupture line 7 are respectively 10%-80% of the thickness of the airbag at other positions of the first air chamber 2 and the second air chamber 3, and the rupture line lengths of the first rupture line 6 and the second rupture line 7 are respectively 5%-80% of the circumference of the maximum cross-section of the first air chamber 2 and the second air chamber 3; when the pressure of the gas entering the first air chamber 2 or the second air chamber 3 through the first one-way air valve 4 or the second one-way air valve 5 exceeds 0.2MPa, the first rupture line 6 or the second rupture line 7 is ruptured or stretched due to the pressure difference between the inside and outside of the airbag, so that the reactants of the first air chamber 2 or the second air chamber 3 are ejected or overflowed, thereby playing a role in contact reaction of different reactants, and the gas that continues to increase through the first one-way air valve 4 or the second one-way air valve 5 can also play a role in stirring and mixing different reactants.

[0027] Furthermore, a third rupture line 8 is provided on the surface of the external air chamber 1 away from the first one-way air valve 4 or the second one-way air valve 5. The thickness of the airbag at the third rupture line 8 is 10%-80% of the thickness of the airbag at other positions of the external air chamber 1. The length of the third rupture line 8 is 5%-80% of the circumference of the maximum cross-section of the external air chamber 1. The third rupture line 8 is also ruptured or stretched when the internal air pressure of the external air chamber 1 increases to a certain range of values. At this time, the reactants have a reaction time of tens of seconds to several minutes, and the reactants of the foam glue have basically reacted and successfully pass through the third rupture line 8 into the external space.

[0028] Furthermore, the first air chamber 2 , the second air chamber 3 and the external air chamber 1 are all made of polyvinyl chloride (PVC).

[0029] Furthermore, the first one-way air valve 4 and the second one-way air valve 5 are located on the same side of the external air chamber 1, so as to facilitate the connection with the external gas delivery device.

[0030] Furthermore, the first reactant comprises isocyanate, and the second reactant comprises polyol, the mass ratio of the isocyanate to the polyol is 1:0.8 to 1:1.3, the polyol may be one of polyether polyol, polyester polyol, acrylic polyol or polycarbonate polyol, the first reactant further comprises a catalyst, and the catalyst may be one of amines, tins or organometallic compounds, and the second reactant further comprises a blowing agent; the polyol and the isocyanate generate polyurethane through polymerization reaction, and the blowing agent releases gas to rapidly expand the polyurethane liquid colloid and form a foam.

[0031] After the external gas pressure applied to the first one-way air valve 4 or the second one-way air valve 5 exceeds 0.2MPa, the first one-way air valve 4 or the second one-way air valve 5 is opened, and the external gas enters the first air chamber 2 and the second air chamber 3 in one direction along the first one-way air valve 4 and the second one-way air valve 5 respectively. Since the first rupture line 6 and the second rupture line 7 are respectively the weak parts of the first air chamber 2 and the second air chamber 3, after the air pressure in the first air chamber 2 and the second air chamber 3 reaches 0.2MPa, the first rupture line 6 or the second rupture line 7 will rupture, and the first reactant and the second reactant (i.e., isocyanate and polyol) inside the first air chamber 2 and the second air chamber 3 will fully react under the action of gas impact to form foam glue. When the external gas raises the internal air pressure of the external air chamber 1 to above 0.2MPa, the gas will expand the third rupture line 8 of the external air chamber 1, and the generated foam glue will overflow outward, thereby filling the gap.

[0032] See also Figure 2, a mining quick-sealing airbag, comprising an inflatable stack 9, wherein the inflatable stack 9 has a curved surface matching the tunnel surface 12 after being inflated, and the outer periphery of the inflatable stack 9 is connected with foam glue to produce an airbag, and the inflatable stack 9 is connected to the first air chamber 2 and the second air chamber 3 in one-way manner through the first one-way air valve 4 and the second one-way air valve 5, respectively. In specific production, the first one-way air valve (4) and the second one-way air valve (5) can be respectively connected to the prefabricated through hole 11 on the surface of the inflatable stack 9 by hot melting, and the air inlet nozzles of the first one-way air valve 4 and the second one-way air valve 5 are both allowed to enter the inflation cavity of the inflatable stack 9, so that the inflatable stack 9 can directly transport gas to the first air chamber 2 and the second air chamber 3 through the first one-way air valve 4 and the second one-way air valve 5 during the inflation process.

[0033] Furthermore, the external air chamber 1 is connected to the inflatable stack 9 by hot-melt bonding, and the inflatable stack 9 is made of flame-retardant and fireproof materials, which may be thermoplastic polyurethane (TPU), fluororubber, flame-retardant PVC film, polytetrafluoroethylene (PTFE) film, and the like.

[0034] Furthermore, the foam glue generating airbags are connected to the inflatable pile 9 in a single or beaded manner, and the foam glue generating airbags are arranged at the corner vacant position between the inflatable pile 9 and the inner surface of the tunnel 12, so as to facilitate the foam glue sealing effect.

[0035] Furthermore, the outer surface of the mining quick-sealing airbag that contacts the tunnel floor after being inflated is fitted with an elastic gasket 10; the elastic gasket 10 can be rubber or other lightweight elastic materials with a thickness of 1-5 mm. On the one hand, it plays a role in supporting the stability of the inflatable stack 9, and on the other hand, it reduces the friction between the inflatable stack 9 and the tunnel floor, and can also make the inflatable stack 9 open quickly.

[0036] The working principle of the present invention is:

[0037] When the inflatable stack 9 is inflated and the air pressure exceeds the threshold of the first one-way air valve 4 or the second one-way air valve 5, the first one-way air valve 4 and the second one-way air valve 5 are opened, and the gas in the inflatable stack 9 enters the first air chamber 2 and the second air chamber 3 in one direction along the air inlet nozzles of the first one-way air valve 4 and the second one-way air valve 5 respectively. After the air pressure in the first air chamber 2 and the second air chamber 3 exceeds a certain pressure value, the first rupture line 6 and the second rupture line 7 are successively opened, and the reaction raw materials (i.e., isocyanate and polyol) in the first air chamber 2 and the second air chamber 3 are opened in the air. Under the impact of the body, it fully reacts to form foam glue. At this time, the foam glue continues to be produced, and the air pressure inside the external air chamber 1 continues to increase. When the air pressure rises to a certain pressure value, the gas will open the third rupture line 8 of the external air chamber 1, and the foam glue produced inside the external air chamber 1 will spray or overflow outward. The gap between the tunnel surface and the inflatable pile 9 and the foam glue producing air bag is filled with the overflowing foam glue. The foam glue can gradually solidify within 10 minutes, so as to fill and seal the tunnel gap and fix the mining rapid sealing air bag.

Claims

1. A foam rubber airbag, comprising an outer air chamber (1), wherein a first air chamber (2) and a second air chamber (3) are arranged inside the outer air chamber (1), characterized in that: The first air chamber (2) and the second air chamber (3) are in one-way communication with the external air chamber (1) and the outside through a first one-way air valve (4) and a second one-way air valve (5), respectively; the external pressurized gas of the external air chamber (1) enters the first air chamber (2) and the second air chamber (3) through the first one-way air valve (4) and the second one-way air valve (5), respectively; the first air chamber (2) and the second air chamber (3) are filled with a first reactant and a second reactant, respectively; the first reactant and the second reactant react to form a foam adhesive after being mixed and contacted.

2. The foam rubber airbag as claimed in claim 1, characterized in that: A first rupture line (6) and a second rupture line (7) are respectively arranged on the surfaces of the first air chamber (2) and the second air chamber (3) away from the first one-way air valve (4) and the second one-way air valve (5); the thickness of the airbag at the first rupture line (6) and the second rupture line (7) is 10% to 80% of the thickness of the airbag at other positions of the first air chamber (2) and the second air chamber (3).

3. The foam rubber airbag as claimed in claim 1, characterized in that: A third rupture line (8) is provided on the surface of the external air chamber (1) away from the first one-way air valve (4) or the second one-way air valve (5), and the thickness of the airbag at the third rupture line (8) is 10%-80% of the thickness of the airbag at other positions of the external air chamber (1).

4. The foam rubber airbag as claimed in claim 1, characterized in that: The first air chamber (2), the second air chamber (3) and the external air chamber (1) are all made of polyvinyl chloride (PVC).

5. The foam rubber airbag as claimed in claim 1, characterized in that: The first one-way air valve (4) and the second one-way air valve (5) are located on the same side of the external air chamber (1).

6. The foam rubber airbag as claimed in claim 1, characterized in that: The first reactant comprises isocyanate, the second reactant comprises polyol, and the mass ratio of the isocyanate to the polyol is 1:0.8 to 1:1.

3.

7. A quick-sealing airbag for mining, comprising an inflatable stack (9), characterized in that: The inflatable stack (9) is connected to the outer periphery of the foam glue generating air bag as claimed in claim 1, and the inflatable stack (9) is unidirectionally connected to the first air chamber (2) and the second air chamber (3) through the first one-way air valve (4) and the second one-way air valve (5) respectively.

8. The rapid sealing airbag for mining as claimed in claim 7, characterized in that: The external air chamber (1) is connected to the inflatable stack (9) by hot-melt bonding, and the inflatable stack (9) is made of flame-retardant and fireproof material.

9. The rapid sealing airbag for mining as claimed in claim 7, characterized in that: The foam glue generates air bags which are connected to the inflatable pile (9) in a single or beaded manner.

10. The rapid sealing airbag for mining as claimed in claim 7, characterized in that: The outer surface of the mining quick-sealing airbag that contacts the ground after being filled with air is fitted with an elastic gasket (10).

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