An integrated vehicle-mounted device for sealing a target area with a coal mine underground solid residue foam

Abstract

This application discloses an integrated vehicle-mounted device for sealing target areas in coal mines, comprising a foaming device, a foam spraying component, and a moving assembly. The foaming device is connected to the foam spraying component and mounted on the moving assembly. The foaming device has a collision foaming chamber and an acceleration chamber, including a converging collision foaming chamber inner wall, which can perform secondary acceleration on the foam premixed liquid generated by the foaming device. A baffle is provided on the inner wall of the collision foaming chamber, and an arc-shaped protrusion is provided on one end of the baffle, which can perform tertiary foaming on the foam premixed liquid. A hyperbolic jet guide is provided on the fixed side of the baffle to facilitate the full mixing and foaming of the foam premixed liquid. The foaming material introduced into the foaming device may include slag, saline cement, and modified foam. This application is applicable to the use of solid slag foam to seal corners, high-risk areas, and roadway sides in coal mines where spontaneous combustion of coal is prone to occur.

Description

Technical Field

[0001] This application relates to the field of coal mining safety technology, and in particular to an integrated vehicle-mounted device for sealing target areas in coal mines using solid slag foam. Background Technology

[0002] Under the requirement of "adjusting the structure and optimizing the layout" at the source of the coal mining industry, green coal mining technologies such as backfilling mining, coal and gas co-mining, and pillarless mining have been promoted. These green coal mining technologies can fully exploit the mines. However, with the increase in the amount of coal mined, a large amount of raw coal cannot be transported out in time, resulting in a large amount of raw coal left in the goaf, which frequently causes coal spontaneous combustion disasters.

[0003] Currently, commonly used measures for preventing spontaneous combustion of coal mainly include grouting for fire prevention and extinguishing, inert gas for fire prevention and extinguishing, and foam spraying for leak sealing. These methods have a certain sealing and fire extinguishing effect, but they generally have the disadvantage of weak foaming properties, and their effect on preventing spontaneous combustion of coal is limited. Summary of the Invention

[0004] In view of this, the embodiments of this application provide an integrated vehicle-mounted device for sealing target areas in coal mines, which can increase the amount of foam produced per unit volume of foaming material.

[0005] To achieve the above objectives, the embodiments of this application provide the following technical solutions:

[0006] This application provides a vehicle-mounted device for sealing target areas using an integrated solid slag foam system in coal mines. The device includes a foaming device with a collision foaming chamber. The collision foaming chamber includes a foaming material inlet, a collision foam outlet, and a tapered inner wall connecting the foaming material inlet and the collision foam outlet. The opening of the inner wall at the foaming material inlet is larger than the opening of the inner wall at the collision foam outlet. Baffles are axially staggered on the inner wall of the collision foaming chamber. Each baffle has an opening near its fixed end close to the inner wall of the tapered collision foaming chamber.

[0007] According to one specific implementation of this application, one side of the free end of the baffle has an arcuate protrusion; the baffle includes a swirling baffle assembly, the swirling baffle assembly includes a first baffle and a second baffle, the swirling side of the arcuate protrusion of the first baffle is opposite to the swirling side of the arcuate protrusion of the second baffle; wherein, the swirling side is the side of the arcuate protrusion that is biased towards the fixed end of the baffle.

[0008] According to one specific implementation of this application, the foaming device further includes an acceleration chamber, which includes an acceleration inlet, an acceleration outlet, and a tapered inner wall connected to the acceleration inlet and the acceleration outlet, wherein the opening of the inner wall at the acceleration inlet is larger than the opening of the inner wall at the acceleration outlet; the acceleration inlet of the acceleration chamber is connected to the collision foam outlet of the collision foaming chamber, wherein the acceleration inlet is larger than the collision foam outlet of the collision foaming chamber.

[0009] According to one specific implementation of this application, the foaming device is connected to an air inlet pipe and a foaming material pipe at the foaming raw material inlet, wherein the air inlet pipe is located at the center of the foaming raw material inlet of the foaming device.

[0010] According to one specific implementation of this application, the foam material tube is provided with anti-backflow blades that can be bent unidirectionally along the feeding direction; when the foam material accumulates and flows back, the anti-backflow blades can cross and close under the reverse push of the foam material to block the foam material tube.

[0011] According to one specific implementation of this application, the angle between the foaming material tube and the end face of the foaming raw material inlet of the foaming device is 40-50°.

[0012] According to a specific implementation of this application, it further includes a foam spraying component, which includes a spraying pipe and a foam nozzle with a receiving cavity. The foam inlet of the spraying pipe is connected to the collision foam outlet of the collision foaming cavity, and the foam outlet of the spraying pipe is connected to the receiving cavity of the foam nozzle. The cavity wall of the receiving cavity of the foam nozzle is provided with a foam jet channel communicating with the outside of the receiving cavity, and the openings of the foam jet channel are arrayed on the cavity wall of the receiving cavity.

[0013] According to one specific implementation of this application, the foam jet channels are arranged in a vortex-like cluster.

[0014] According to one specific implementation of this application, a ball bearing is provided at the foam inlet of the injection pipe.

[0015] According to one specific implementation of this application, the foam spraying component further includes an outer inlay shell, and an embedded axial bearing is provided between the spraying pipeline and the outer inlay shell.

[0016] According to a specific implementation of this application, a hydraulic crushing device is further included, comprising a double-layer cylindrical shell and a water inlet pipe; the double-layer cylindrical shell includes a water inlet, a feed inlet, a discharge outlet, and a crushing chamber, wherein the water inlet, the feed inlet, and the discharge outlet are respectively connected to the crushing chamber, and the discharge outlet is also connected to the foaming material inlet of the collision foaming chamber of the coal mine underground solid slag foam integrated vehicle-mounted device used for sealing the target area; a coaxial drive shaft is provided inside the crushing chamber, and a drive turbine is sleeved at one end of the drive shaft, the drive turbine being arranged opposite to the water inlet; rotating blades are provided on the shaft of the drive shaft, and crushing blades are provided on the cavity wall of the crushing chamber of the double-layer cylindrical shell, the rotating blades on the drive shaft and the crushing blades on the cavity wall of the crushing chamber being arranged alternately in the axial direction.

[0017] According to one specific implementation of this application, the bottom of the crushing chamber of the double-layer cylindrical shell of the hydraulic crushing device is provided with a filter screen, and the discharge port of the double-layer cylindrical shell is located below the filter screen.

[0018] According to one specific implementation of this application, the hydraulic crushing device further includes a water inlet pipe, which includes a drive branch pipe and a liquid delivery branch pipe. The liquid delivery branch pipe is connected to the foaming agent through a suction pipe. The double-layer cylindrical shell is also provided with a liquid inlet. The outlet of the drive branch pipe is connected to the water inlet of the double-layer cylindrical shell, and the outlet of the liquid delivery branch pipe is connected to the liquid inlet of the double-layer cylindrical shell. The diameter of the middle section of the liquid delivery branch pipe is smaller than the diameter of the front and rear sections of the liquid delivery branch pipe.

[0019] According to one specific implementation of this application, the drive shaft is provided with a liquid delivery chamber, which is connected to the liquid inlet of the double-layer cylindrical shell; the wall of the liquid delivery chamber of the drive shaft is provided with a liquid delivery port, which connects the liquid delivery chamber of the drive shaft and the crushing chamber of the double-layer cylindrical shell.

[0020] According to one specific implementation of this application, the liquid delivery ports on the wall of the liquid delivery chamber of the drive shaft are symmetrically distributed, and the liquid delivery ports are arranged in increasing order along the flow direction of the liquid in the liquid delivery chamber of the drive shaft.

[0021] According to one specific implementation of this application, the coal mine underground solid slag foam integrated vehicle-mounted device for sealing target areas further includes a mobile component, the mobile component including a first track, a second track and a load-bearing plate connected to the first track and the second track; the hydraulic crushing device includes a connecting seat, the connecting seat being disposed on the load-bearing plate.

[0022] The vehicle-mounted device for sealing target areas in coal mines, provided in this application, includes a foaming device with a collision foaming chamber. Baffles are axially staggered on the inner wall of the collision foaming chamber. When the foaming material flows within the collision foaming chamber, foam is generated through collisions between the foaming material and the baffles. Firstly, the inner wall of the collision foaming chamber gradually narrows from the foaming material inlet towards the collision foam outlet. This gradually increases the flow velocity of the foaming material as it flows within the chamber, enhancing the intensity of the collisions between the material and the baffles, thus ensuring sufficient foaming and increasing the amount of foam produced per unit volume of material. Secondly, an opening is provided at the fixed end of the baffle near the narrowing inner wall of the collision foaming chamber. Airflow can pass through this opening to further collide with the foaming material, further ensuring sufficient foaming and increasing the amount of foam produced per unit volume of material. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of one embodiment of the coal mine underground solid slag foam integrated vehicle-mounted device for sealing target areas, as described in this application.

[0025] Figure 2 for Figure 1 The diagram shows the structure of the foaming device of the integrated vehicle-mounted solid slag foam device for sealing target areas in coal mines.

[0026] Figure 3 for Figure 2 The diagram shows the structure of the baffle in the foaming device.

[0027] Figure 4 for Figure 2 A schematic diagram of sinusoidal rotary mixing within the foaming device shown;

[0028] Figure 5 This is a schematic diagram of the connecting end cap of an embodiment of the coal mine underground solid slag foam integrated vehicle-mounted device for sealing target areas, as described in this application.

[0029] Figure 6 This is a schematic diagram of the foaming material pipe of the foaming device of the integrated vehicle-mounted solid slag foam device for sealing target areas in coal mines, as described in this application.

[0030] Figure 7 This is a schematic diagram of the internal structure of the foaming material pipe of the foaming device of the coal mine underground solid slag foam integrated vehicle-mounted device used for sealing target areas in this application;

[0031] Figure 8 for Figure 1 The diagram shows the structure of the spray pipe of the foam spraying component of the underground coal mine solidification foam integrated vehicle-mounted device for sealing target areas;

[0032] Figure 9 for Figure 1 The diagram shows the structure of the spray nozzle of the foam spraying component of the integrated vehicle-mounted solidification foam device for sealing target areas in coal mines.

[0033] Figure 10 for Figure 1 The diagram shows a structural schematic of a hydraulic fracturing device for an integrated vehicle-mounted solid slag foam sealing device used to seal off target areas in coal mines.

[0034] Figure 11 for Figure 10 The diagram shows the structure of the double-layer cylindrical shell of the hydraulic crusher.

[0035] Figure 12 A schematic diagram illustrating the application of this invention's integrated vehicle-mounted device for sealing target areas in coal mines, demonstrating the sealing of different areas in a coal mine.

[0036] Figure 13 A schematic diagram illustrating the application of this invention's underground coal mine solid slag foam integrated vehicle-mounted device for sealing target areas, used for sealing lower corners;

[0037] Figure 14 This is a schematic diagram illustrating the layer-by-layer spraying of an embodiment of the coal mine underground solid slag foam integrated vehicle-mounted device for sealing target areas, as described in this application. Detailed Implementation

[0038] The embodiments of this application will now be described in detail with reference to the accompanying drawings.

[0039] It should be understood that the described embodiments are merely some, not all, of the embodiments in this application. All other embodiments obtained by those skilled in the art based on the embodiments in this application without inventive effort are within the scope of protection of this application.

[0040] This invention provides a vehicle-mounted device for sealing target areas in coal mines that integrates solidification foaming with foaming material, which can increase the amount of foam produced per unit volume of foaming material.

[0041] The following combination Figures 1 to 11The embodiments of this application will be further described below.

[0042] Figure 1 This application shows a schematic diagram of the structure of a vehicle-mounted device for sealing target areas in coal mines, integrating solidification foam, and other components. (See attached diagram.) Figure 1 As shown, the integrated vehicle-mounted device for sealing target areas in coal mines using solid slag foam in this application may include a foaming device 1, a foam spraying component 2, a hydraulic crushing device 3, and a moving component 4. Solid slag foam is an expanded, foam-like substance that is sprayed from the coal mine solid slag foam generating device and solidifies upon exposure to air.

[0043] See Figure 2 As shown, the foaming device 1 includes a collision foaming chamber 101, which comprises a foaming material inlet 1011, a collision foam outlet 1012, and a tapered inner wall 1013 connecting the foaming material inlet 1011 and the collision foam outlet 1012; wherein the opening of the inner wall at the foaming material inlet 1011 is larger than the opening of the inner wall at the collision foam outlet 1012. In one embodiment, the radial dimension of the foaming material inlet 1011 of the collision foaming chamber 101 is 190 cm, and the collision foam outlet 1012 of the collision foaming chamber is 110 cm.

[0044] See Figure 2 As shown, in one embodiment, the cavity of the collision foaming chamber 101 is frustum-shaped. In this case, the opening of the inner wall at the foaming material inlet 1011 refers to the radial dimension on the cross-section of the inner wall where the foaming material inlet 1011 is located. In one embodiment, the foaming material includes coal particles and a foaming agent.

[0045] See Figure 2 As shown, baffles 102 are axially staggered on the inner wall of the collision foaming chamber 101. When the foaming material flows in the collision foaming chamber 101, it collides with the side of a baffle 102 facing the foaming material inlet 1011. Under the blocking effect of the staggered baffles 102, it flows toward the baffle 102 and collides again with the side of the baffle 102 facing away from the foaming material inlet 1011. By increasing the number of collisions between the foaming material and the baffles 102, the foaming material can be fully foamed, thereby increasing the amount of foam produced per unit volume of foaming material.

[0046] An opening 1021 is provided at the fixed end of the baffle 102 near the inner wall 1013 of the tapered collision foaming chamber. See also Figure 3 As shown, in one embodiment, the upper and lower surfaces of the opening 1021 are curved, and its length occupies two-thirds of the width of the baffle 102 and extends through one side of the baffle 102 (the opening 1021 in this embodiment is also referred to as a hyperbolic jet guide).

[0047] The coal mine underground solid slag foam integrated vehicle-mounted device for sealing target areas provided in this application includes a foaming device 1. The foaming device 1 is provided with a collision foaming chamber 101. Baffles 102 are arranged axially and alternately on the inner wall of the collision foaming chamber 101. In this way, when the foaming material flows along the collision foaming chamber 101, foam can be generated through the collision between the foaming material and the baffles 102. On the one hand, the inner wall of the collision foaming chamber 101 is a wall that gradually narrows from the foaming material inlet 1011 to the collision foam outlet 1012. In this way, when the foaming material flows along the collision foaming chamber 101, the flow speed of the foaming material will gradually increase, thereby enhancing the intensity of the collision between the foaming material and the baffle 102, which can make the foaming material fully foamed, thereby increasing the amount of foam produced per unit volume of foaming material. On the other hand, an opening 1021 is provided at the fixed end of the baffle 102 near the narrowing inner wall of the collision foaming chamber 101. The airflow can pass through the opening 1021 near the fixed end of the baffle 102 to further collide with the foaming material, thereby making the foaming material fully foamed and increasing the amount of foam produced per unit volume of foaming material.

[0048] See Figure 3 As shown, in one embodiment, one side of the free end of the baffle 102 on the inner wall of the collision foaming chamber 101 has an arc-shaped protrusion 1022 connected to the other side of the baffle 102 by a rounded corner. Thus, the baffle 102 has three turning points connecting the rounded corner, the top of the arc-shaped protrusion 1022, and the connection point between the arc-shaped protrusion 1022 and the side of the baffle 102 with the arc-shaped protrusion 1022. When the foaming material flows along the collision foaming chamber 101, the collision between the foaming material and the turning points of the baffle 102 becomes more intense. Thus, the baffle 102 has three turning points through the arc-shaped protrusion 1022, which can further collide with the foaming material, thereby enabling the foaming material to fully foam and increasing the amount of foam produced per unit volume of foaming material.

[0049] See Figure 4As shown, in one embodiment, the baffle includes a swirling baffle assembly, which includes a first baffle and a second baffle. The swirling side of the arcuate protrusion of the first baffle is opposite to the swirling side of the arcuate protrusion of the second baffle. The swirling side is the side of the arcuate protrusion that is biased towards the fixed end of the baffle. In other words, the top of the aforementioned arcuate protrusion 1022 of each adjacent baffle 102 and the turning point at the connection between the arcuate protrusion 1022 and the side of the baffle 102 with the arcuate protrusion 1022 are arranged opposite each other. In this way, when the foaming material flows along the collision foaming cavity 101, after colliding with the baffle 102, while flowing along the baffle 102, it can flow towards the top of the arc protrusion 1022 of the adjacent baffle 102 and the turning point where the arc protrusion 1022 connects with the side of the baffle 102 with the arc protrusion 1022 (which can also be called the turning point where the foaming material undergoes sinusoidal rotational mixing at the top of the arc protrusion 1022 of the adjacent baffle 102 and the turning point where the arc protrusion 1022 connects with the side of the baffle 102 with the arc protrusion 1022), thus slowing down the slurry flow rate and further mixing, so that the foaming material can be fully foamed.

[0050] Since flow rate is conserved, the flow rates before and after baffle 102 are the same. The surface area of ​​the side of baffle 102 without the arc-shaped protrusion 1022 is S1, and the flow velocity on this side is V1. The surface area of ​​the side of baffle 102 with the arc-shaped protrusion 1022 is S2, and the flow velocity on this side is V2. Because of the arc-shaped protrusion 1022, the flow area on the side of baffle 102 with the arc-shaped protrusion 1022 is smaller, i.e., S2 < S1.

[0051] Q = V·S, where Q is the flow rate, V is the flow velocity, and S is the flow area. Therefore, V1 > V2 in this case.

[0052]

[0053] Where P is the fluid pressure (unit: Pascal, Pa), and ρ is the fluid density (unit: kg / m³). 3 V is the fluid velocity (unit: m / s), g is the gravitational acceleration (unit: m / s²), and h is the fluid height (unit: m).

[0054] Based on the above equations, it can be seen that the pressure is low where the flow velocity is high, i.e., P1 (pressure on the side of baffle 102 without the arc-shaped protrusion 1022) > P2 (pressure on the side of baffle 102 with the arc-shaped protrusion 1022). Therefore, ΔP = P1 - P2 > 0. The side of baffle 102 with the arc-shaped protrusion 1022 has a thrust perpendicular to the curved surface, which can push the airflow and the mixed slurry upward along the hyperbolic jet pipe, thereby causing a collision with the horizontal direction, realizing the self-mixing of the foam premix, and intensifying the collision of the foam premix, which is beneficial to increasing the foaming amount of the foam premix. The magnitude of the thrust is F. P = (P1-P2)·S.

[0055] In one embodiment, the baffle 102 on the inner wall of the impact foaming cavity 101 forms an angle of 10° to 20° with the vertical direction. In one embodiment, the baffle 102 on the inner wall of the impact foaming cavity 101 forms an angle of 10° with the vertical direction. In another embodiment, the baffle 102 on the inner wall of the impact foaming cavity 101 forms an angle of 15° with the vertical direction. In yet another embodiment, the baffle 102 on the inner wall of the impact foaming cavity 101 forms an angle of 20° with the vertical direction.

[0056] See Figure 2 As shown, in one embodiment, the foaming device 1 further includes an acceleration chamber 103, the acceleration inlet 1031 of the acceleration chamber 103 being connected to the collision foam outlet 1012 of the collision foaming chamber 101. In this way, the foam premix generated by the collision foaming chamber 101 can further enhance its flow rate in the acceleration chamber 103 to facilitate foam spraying.

[0057] Specifically, the acceleration inlet 1031 of the acceleration chamber 103 is larger than the collision foam outlet 1012 of the collision foaming chamber 101, so that the foam premix liquid flowing out from the collision foam outlet 1012 of the collision foaming chamber 101 can be sprayed into the acceleration chamber 103.

[0058] The acceleration chamber 103 includes an acceleration inlet 1031, an acceleration outlet 1032, and a tapered inner wall 1033 connected to the acceleration inlet 1031 and the acceleration outlet 1032. The opening of the inner wall at the acceleration inlet 1031 is larger than the opening of the inner wall at the acceleration outlet 1032, so that the foam premix liquid can be sprayed from the collision foam outlet 1012 of the collision foaming chamber 101 into the acceleration chamber 103.

[0059] Q = V·S, where Q is the flow rate of the foam premixed liquid, V is the flow velocity of the foam premixed liquid, and S is the cross-sectional area of ​​the inner wall of the acceleration chamber 103. Therefore, as the cross-sectional area of ​​the inner wall 1033 of the acceleration chamber decreases, the flow velocity of the foam premixed liquid gradually increases, reaching its maximum velocity at the acceleration outlet 1032 of the acceleration chamber 103. The larger the fluid volume, the greater the negative pressure generated. Therefore, the foam premixed liquid can generate a large negative pressure at the acceleration outlet 1032 of the acceleration chamber 103, ensuring that both the gas and the foam premixed liquid at the acceleration outlet 1032 of the acceleration chamber 103 are in a jet state. This facilitates the spraying of foam by the integrated vehicle-mounted device for sealing target areas in coal mines, as described in this application.

[0060] See Figure 2 As shown, in one embodiment, an air inlet 1034 is inclinedly provided on the inner wall 1033 of the acceleration chamber, and the air inlet 1034 is connected to the outside air.

[0061] In one embodiment, the air inlet 1034 is connected to an air pump, so that gas can be introduced into the acceleration chamber 103 through the air pump, further enhancing the flow rate of the foam premixed liquid in the acceleration chamber 103, so as to facilitate the spraying of foam by the coal mine underground solid slag foam integrated vehicle-mounted device for sealing target areas of this application.

[0062] See Figure 2 As shown, in one embodiment, the foaming device 1 may further include a fan blade foaming cavity 104. The fan blade foaming cavity 104 has a fan blade foaming inlet 1041 and a fan blade foaming outlet 1042 at both ends. Fan blades 1044 are equidistantly arranged along the axis within the equal-diameter cavity. The fan blade foaming inlet 1041 is connected to the acceleration outlet 1032 of the acceleration cavity 103. The acceleration outlet 1032 is equal to the fan blade foaming inlet 1041 of the fan blade foaming cavity 104. The blade surface of the fan blade 1044 is arranged facing the fan blade foaming inlet 1041 (or the fan blade foaming outlet 1042) of the fan blade foaming cavity 104.

[0063] After the foam premixed liquid flowing out of the acceleration outlet 1032 of the acceleration chamber 103 flows into the fan blade foaming chamber 104, the foam premixed liquid will directly impact the fan surface of the fan blade 1044 inside the fan blade foaming chamber 104. In this way, the rapid decay of the kinetic energy of the foam premixed liquid flow will generate a large amount of excess energy, so as to promote the foam, the insufficiently mixed foaming raw materials and the gas (gas, liquid and solid three phases) mixed in the foam premixed liquid flow to be fully stirred and mixed here. At the same time, the rotation of the fan blade 1044 can generate violent turbulent vortices, further stirring the foam premixed liquid, so as to further generate foam in the foam premixed liquid.

[0064] Furthermore, when the foam premix flows from the fan blade foaming cavity 104 toward the fan blade foaming outlet 1042, it is mechanically cut and squeezed and dispersed by the fan blade 1044 in the fan blade foaming cavity 104. This makes the foam more delicate and improves the quality of the foam produced.

[0065] See Figure 2 As shown, in one embodiment, the equal-diameter cavity 1043 of the fan blade foaming cavity 104 is radially provided with a support rod 1045, and the fan blade 1044 of the fan blade foaming cavity 104 is disposed on the support rod 1045.

[0066] In one embodiment, three sets of fan blades 1044 are equidistantly arranged along the axis inside the equal-diameter cavity 1043. The number of sets of fan blades 1044 can be set according to the fineness of the generated foam. The finer the generated foam, the more sets of fan blades 1044 are required.

[0067] See Figure 2 As shown, in one embodiment, the fan blade foaming chamber 104 and the acceleration chamber 103 are connected by a flange 1047 to facilitate the replacement of the fan blade foaming chamber 104 and the replacement and maintenance of the fan blade 1044 and other structures in the fan blade foaming chamber 104.

[0068] In one embodiment, the first fan blade 1044 near the fan blade foaming outlet 1042 in the fan blade foaming chamber 104 has a preset distance from the fan blade foaming outlet 1042, so that the foam premix liquid flowing out from the acceleration outlet 1032 of the acceleration chamber 103 can easily enter the fan blade foaming chamber 104.

[0069] See Figure 2 As shown, in one embodiment, the foaming device 1 further includes a transition pipe 1046. One end of the transition pipe 1046 is connected to the acceleration outlet 1032 of the acceleration chamber 103, and the other end of the transition pipe 1046 is connected to the fan blade foaming inlet 1041 of the fan blade foaming chamber 104. The diameter of the transition pipe 1046 is the same as the radial dimension of the acceleration chamber 103, which facilitates the smooth entry of the foam premixed liquid flowing out of the acceleration outlet 1032 of the acceleration chamber 103 into the fan blade foaming chamber 104. One end of the transition pipe 1046 can be connected to the acceleration chamber 103 via a flange 1047, and the other end of the transition pipe 1046 can be connected to the fan blade foaming chamber 104 via a flange 1047.

[0070] In one embodiment, an air inlet pipe and a foaming material pipe are connected to the foaming material inlet 1011 of the foaming device 1. The air inlet pipe is located at the center of the foaming material inlet 1011 of the foaming device 1. In this way, the gas provided by the air inlet pipe can provide maximum power to the foaming material entering the foaming device 1 through the foaming material inlet 1011.

[0071] In one embodiment, the coal mine underground solid slag foam integrated vehicle-mounted device for sealing the target area also includes a connecting end cap 105, which is connected to the foaming material inlet 1011 of the foaming device 1, for example, by a threaded connection. The connecting end cap 105 is provided with an air inlet 1051 and a feeding part, wherein the air inlet 1051 is connected to an air inlet pipe and the feeding part is connected to a foaming material pipe.

[0072] See Figure 5 As shown, in another embodiment, the integrated vehicle-mounted device for sealing target areas in coal mines also includes a connecting end cap 105. The connecting end cap 105 is connected to the foaming material inlet 1011 of the foaming device 1, for example, by a threaded connection. The connecting end cap 105 is provided with an air inlet 1051, a first feeding part 1052, and a second feeding part 1053. The air inlet 1051 is connected to an air inlet pipe, the first feeding part 1052 is connected to a foaming material pipe, and the second feeding part 1053 is connected to a composite slurry foaming material. In this way, the integrated vehicle-mounted device for sealing target areas in coal mines can generate foam through the combined use of the foaming material and the composite slurry foaming material.

[0073] In addition, by feeding the foaming raw materials and composite foam materials separately through two feeding sections, the conveying efficiency of the foaming raw materials and composite foam materials can be improved.

[0074] In one embodiment, the composite foam material may include 50% solid waste slag, 40% saline cement and 10% modified foam.

[0075] See Figure 6 As shown, in one embodiment, the foam material pipe is provided with an anti-backflow blade 1054 that can be bent unidirectionally along the feeding direction; when the foam material accumulates and flows back, the anti-backflow blade 1054 can cross and close under the reverse push of the foam material to block the foam material pipe, thereby preventing the foam material from flowing back in the foam material pipe.

[0076] The anti-backflow blade 1054 can be made of a shape memory material, such as a shape memory alloy, and a groove or groove is provided on one side of the anti-backflow blade 1054 so that the anti-backflow blade 1054 can only be bent in one direction along the feeding direction and cannot be bent in the opposite direction.

[0077] See Figure 6 As shown, in one embodiment, three anti-backflow blades 1054 are provided on one cross-section of the foamed material pipe. Each anti-backflow blade 1054 is arc-shaped with a central angle of 120°, an arc length of one-third of the circumference of the cross-section of the foamed material pipe, and a radius of the cross-section of the foamed material pipe, for example, 20cm.

[0078] In one embodiment, the anti-backflow blade 1054 is bent at an angle of 0 to 90° in the feeding direction. In one embodiment, no foaming material flows inside the foaming material pipe, and the anti-backflow blade 1054 is bent at an angle of 0° in the feeding direction. In another embodiment, foaming material flows inside the foaming material pipe, and the anti-backflow blade 1054 is bent at an angle of 45° in the feeding direction. In yet another embodiment, the anti-backflow blade 1054 is bent at an angle of 90° in the feeding direction.

[0079] See Figure 5 and Figure 6 As shown, in one embodiment, anti-backflow blades 1054 that can be bent unidirectionally along the feeding direction are respectively provided on multiple cross sections of the foam material pipe.

[0080] In one embodiment, the angle between the pipe of the foaming material tube and the end face of the foaming raw material inlet 1011 of the foaming device 1 is 40° to 50°. In another embodiment, the angle between the pipe of the foaming material tube and the end face of the foaming raw material inlet 1011 of the foaming device 1 is 40°. In yet another embodiment, the angle between the pipe of the foaming material tube and the end face of the foaming raw material inlet 1011 of the foaming device 1 is 45°. In still another embodiment, the angle between the pipe of the foaming material tube and the end face of the foaming raw material inlet 1011 of the foaming device 1 is 50°.

[0081] See Figure 5 and Figure 6 As shown, in one embodiment, the foaming material tube includes a fan-shaped curved surface inlet 1055 and a feed pipe 1056. The feed end of the feed pipe 1056 is connected to the fan-shaped curved surface inlet 1055, and the discharge end of the feed pipe 1056 is connected to the foaming raw material inlet 1011 of the foaming device 1. The aforementioned anti-backflow blade 1054 is provided inside the feed pipe 1056.

[0082] In other words, the foaming material tube is funnel-shaped, which allows the foaming material to enter the collision foaming chamber 101 of the foaming device 1 of the coal mine underground solid slag foam integrated vehicle-mounted device used for sealing the target area, while filtering out solid impurities or larger solid particles in the foaming material.

[0083] See Figure 8As shown, in one embodiment, the integrated vehicle-mounted device for sealing target areas in coal mines further includes a foam spraying component 2. The foam spraying component 2 includes a spraying pipe 201 and a foam nozzle 202 with a receiving cavity. The foam inlet of the spraying pipe 201 is connected to the impact foam outlet 1012 of the impact foaming cavity 101, and the foam outlet of the spraying pipe 201 is connected to the receiving cavity of the foam nozzle 202. A foam jet channel 203 is provided on the cavity wall of the foam nozzle 202, connecting the receiving cavity to the outside. The openings 1021 of the foam jet channel 203 are arrayed on the cavity wall of the receiving cavity. Thus, the foam in the foam spraying component 2 can be sprayed circumferentially from the foam nozzle 202 of the foam spraying component 2, thereby expanding the coverage area of ​​the sprayed foam of the integrated vehicle-mounted device for sealing target areas in coal mines.

[0084] In one embodiment, the pressure of the premixed foam liquid at the foam inlet of the spray pipe 201 of the foam spraying component 2 can reach about 80 kPa, and the range of the premixed foam liquid ejected from the foam nozzle of the foam spraying component 2 exceeds 4.0 m, with a diffusion angle of 35°. In one example, when the premixed foam liquid is sprayed to a target area 3.0 m away from the foam nozzle of the foam spraying component 2, a coverage area of ​​0.4 m × 1.6 m can be formed.

[0085] See Figure 1 As shown, in one embodiment, the foam inlet of the injection pipe 201 can be connected to the foam outlet of the fan blade 1044 of the fan blade foaming chamber 104.

[0086] See Figure 9 As shown, compared to the circumferential arrangement of foam jet channels 203 (each foam jet channel 203 is arranged along the diameter direction), foam is sprayed to cover a larger area. In one embodiment, the foam nozzle 202 of the foam spraying component 2 of this application is columnar, and the receiving cavity of the foam nozzle 202 is also columnar. On the cavity wall of the columnar receiving cavity, the foam jet channels 203 are arranged in a vortex-like cluster. In this way, the foam premixed liquid is sprayed out in a flat cuboid shape along the foam jet channel 203. Multiple groups of flat cuboid foam can be tilted and interlocked to form columnar foam, which can spray more foam in a unit area. The foam sprayed by the foam spraying component 2 of this application is used for fire extinguishing. Thus, spraying more foam in a unit area can enhance the fire extinguishing effect of the foam sprayed by the foam spraying component 2.

[0087] See Figure 8 As shown, in one embodiment, a ball bearing 204 is provided at the foam inlet of the spray pipe 201.

[0088] In this way, the foam premixed liquid flowing from the foam outlet of the foaming chamber connected to the foam inlet of the spray pipe 201 will impact the ball bearing 204 before entering the foam inlet of the spray pipe 201, further foaming the premixed liquid and making the sprayed foam finer and more uniform. Furthermore, by setting the ball bearing 204, the cross-sectional area at the foam inlet can be reduced. As mentioned above, Q = V·S. Similarly, a smaller cross-sectional area at the foam inlet increases the flow rate of the foam premixed liquid, allowing the foam sprayed from the spray pipe 201 to travel faster, thus enabling rapid fire extinguishing.

[0089] In one embodiment, the foam inlet of the spray pipe 201 is connected to the foam outlet of the foaming chamber via a ball bearing 204. Thus, after the foam premixed liquid enters the spray pipe 201 through the ball bearing 204, it impacts the inner wall of the spray pipe 201, causing it to oscillate around the ball bearing 204. This oscillates the foam nozzle 202 connected to the spray pipe 201, thereby expanding the spray range of the foam nozzle 202, minimizing foam loss, and enabling rapid fire extinguishing.

[0090] The foam outlet of the foaming chamber can be the collision foam outlet 1012 of the collision foaming chamber 101, or the fan blade 1044 foam outlet of the fan blade foaming chamber 104.

[0091] See Figure 8 As shown, in one embodiment, the foam spraying component 2 further includes an outer inlay shell 205. An embedded axial bearing 206 is provided between the spraying pipe 201 and the outer inlay shell 205. In this way, the spraying pipe 201 of the foam spraying component 2 can rotate around the axis inside the outer inlay shell 205 of the foam spraying component 2, so that the foam flow is gradually accelerated and the foam premix is ​​further mixed, so that the sprayed foam (the foam premix is ​​sprayed from the foam nozzle 202 of the foam spraying component 2 to the outside of the foam spraying component 2 to form foam) is more delicate and uniform.

[0092] See Figure 10 As shown, in one embodiment, the coal mine underground solid slag foam integrated vehicle-mounted device for sealing the target area also includes a hydraulic crushing device 3, which includes a double-layer cylindrical shell 301 and a water inlet pipe 302.

[0093] See Figure 11 As shown, the double-layer cylindrical shell 301 includes a water inlet 3011, a feed inlet 3012, a discharge outlet 3013, and a crushing chamber 3014. The water inlet 3011, the feed inlet 3012, and the discharge outlet 3013 are respectively connected to the crushing chamber 3014. The discharge outlet 3013 is also connected to the foaming material inlet 1011 of the collision foaming chamber 101 of the coal mine underground solid slag foam integrated vehicle-mounted device used for sealing the target area.

[0094] See Figure 11 As shown, a coaxial drive shaft 3015 is provided inside the crushing chamber 3014. A drive turbine 3016 is sleeved at one end of the drive shaft 3015, and the drive turbine 3016 is arranged opposite to the water inlet 3011. Rotating blades 3017 are provided on the shaft of the drive shaft 3015, and crushing blades 3018 are provided on the cavity wall of the crushing chamber 3014 of the double-layer cylindrical shell 301. The rotating blades 3017 on the drive shaft 3015 and the crushing blades 3018 on the cavity wall of the crushing chamber 3014 are staggered in the axial direction. In this way, the foaming material entering the crushing chamber 3014 from the feed inlet 3012 can be crushed into foaming raw material under the extrusion of the adjacent surfaces of the rotating blades 3017 and the crushing blades 3018, and then enters the collision foaming chamber 101 of the coal mine underground solid slag foam integrated vehicle-mounted device for sealing the target area from the discharge outlet 3013. Furthermore, the foamed material entering the crushing chamber 3014 through the feed inlet 3012 can rotate around the drive shaft 3015 under the action of the rotating blades 3017 on the drive shaft 3015, thereby colliding with the crushing blades 3018. Under the shearing force of the crushing blades 3018, it is further crushed into foamed raw material. The rotating blades 3017 and the crushing blades 3018 are made of stainless steel, which prevents them from breaking due to excessive torque during the crushing of the foamed material.

[0095] See Figure 11 As shown, in one embodiment, a thrust bearing 3019, such as a thrust ball bearing 204, is provided between the end of the drive shaft 3015 and the end of the crushing chamber 3014.

[0096] In one embodiment, the double-layer cylindrical shell 301 has an inner height of 400 mm and a wall thickness of 10 mm. A water inlet 3011 and a feed inlet 3012 are provided at different positions on the side of the double-layer cylindrical shell 301 at a distance of 1 / 4 from the upper part. A drive turbine 3016 is installed in the crushing chamber 3014 of the double-layer cylindrical shell 301 at a distance of 1 / 4 from the upper part. A discharge outlet 3013 is provided on the side of the double-layer cylindrical shell at a position of 1 / 4 from the bottom. The foaming material is coal lumps. The feed inlet 3012 of the double-layer cylindrical shell 301 has a diameter of 50mm. The rotating blades 3017 on the drive shaft 3015 of the double-layer cylindrical shell 301 have a thickness of 30mm. The axial spacing between the rotating blades 3017 is 60mm. The axial distance between the rotating blades 3017 closest to the drive turbine 3016 and the drive turbine 3016 sleeved on the drive shaft 3015 is 30mm. The crushing blades 3018 on the wall of the crushing chamber 3014 of the double-layer cylindrical shell 301 have a thickness of 10mm.

[0097] In one embodiment, both the rotating blade 3017 and the crushing blade 3018 are curved blades, and the bending directions of the rotating blade 3017 and the crushing blade 3018 are opposite.

[0098] See Figure 11 As shown, in one embodiment, a filter screen 3020 is provided at the bottom of the crushing chamber 3014 of the double-layer cylindrical shell 301 of the hydraulic crushing device 3, and the discharge port 3013 of the double-layer cylindrical shell 301 is located below the filter screen 3020. In this way, only foaming material that meets the pore size requirements of the filter screen 3020 can pass through the filter screen 3020 and enter the impact foaming chamber 101 through the discharge port 3013.

[0099] The filter 3020 can be replaced depending on the type of foaming material or the foaming requirements.

[0100] In one embodiment, there is a preset distance between the filter screen 3020 and the rotating blade 3017 of the drive shaft 3015 closest to the filter screen 3020, so that by rotating the rotating blade 3017, the foamed material on the filter screen 3020 that is larger than the filter screen pore size can be further crushed under the friction and extrusion of the rotating blade 3017 and the filter screen, thereby improving the crushing rate of the foamed material in the crushing chamber 3014 and thus improving the material utilization rate.

[0101] In one embodiment, the preset distance between the filter screen 3020 and the rotating blades 3017 on the drive shaft 3015 is equal to the axial spacing between the rotating blades 3017 on the drive shaft 3015, for example, 70 mm.

[0102] See Figure 10 As shown, in one embodiment, the hydraulic crushing device 3 further includes a water inlet pipe 302, which includes a drive branch pipe 3021 and a liquid delivery branch pipe 3022. The liquid delivery branch pipe 3022 is connected to the foaming agent through a suction pipe 3023. The double-layer cylindrical shell 301 is also provided with a liquid inlet 3024. The water outlet of the drive branch pipe 3021 is connected to the water inlet 3011 of the double-layer cylindrical shell 301, and the liquid outlet 3025 of the liquid delivery branch pipe 3022 is connected to the liquid inlet 3024 of the double-layer cylindrical shell 301.

[0103] See Figure 10As shown, specifically, the middle section of the liquid delivery branch pipe 3022 is equipped with a suction pipe 3023 connected to the foaming agent. The diameter of the middle section of the liquid delivery branch pipe 3022 is smaller than the diameter of the front and rear sections of the liquid delivery branch pipe 3022. Thus, when water flows from the front section of the liquid delivery branch pipe 3022 into the narrower cross-sectional area of ​​the middle section, the flow velocity increases, thereby reducing the pressure in the middle section of the liquid delivery branch pipe 3022. This results in the pressure in the suction pipe 3023 being greater than the pressure inside the middle section of the liquid delivery branch pipe 3022. Consequently, the foaming agent flows into the middle section of the liquid delivery branch pipe 3022 under high pressure, mixes with the water in the middle section, and then enters the crushing chamber 3014 of the double-layer cylindrical shell 301. In this way, water and liquid (water mixed with foaming agent) can be supplied to the double-layer cylindrical shell 301 simultaneously through a single water intake, simplifying the structure of the hydraulic crusher 3 and reducing the space occupied by the hydraulic crusher 3.

[0104] See Figure 10 and Figure 11 As shown, in one embodiment, a liquid inlet 3024 is provided at the top center of the double-layer cylindrical shell 301; the drive branch pipe 3021 is 1000mm long, and a liquid delivery branch pipe 3022 is connected 100mm away from the water inlet 3011 of the drive branch pipe 3021. The liquid delivery branch pipe 3022 is 900mm long in total, with a front section of 350mm, a middle section of 350mm, and a rear section of 350mm.

[0105] The diameter of the drive branch pipe 3021 is 40mm, the diameter of the front and rear sections of the liquid delivery branch pipe 3022 is 40mm, and the diameter of the middle section of the liquid delivery branch pipe 3022 is 18mm. This pipe diameter ratio can effectively improve the liquid suction efficiency. Furthermore, the diameter of the drive branch pipe 3021 and the front section of the liquid delivery branch pipe 3022 are the same, which can reduce the kinetic energy loss of the liquid delivery branch pipe 3022 under a fixed flow rate and water pressure.

[0106] In one example, the total water flow rate is 20 L / s, and the ratio of water flow in the drive branch pipe to water flow in the delivery branch pipe is 4:1.

[0107] See Figure 10 As shown, in one embodiment, a conical tube is used to connect the front and middle sections of the liquid delivery branch pipe 3022, and a conical tube is used to connect the middle and rear sections of the liquid delivery branch pipe 3022. This can further increase the flow velocity from the front section of the liquid delivery branch pipe 3022 into the middle section of the liquid delivery branch pipe 3022. The acceleration principle is the same as the acceleration principle of the aforementioned tapered pipeline.

[0108] See Figure 11As shown, in one embodiment, the drive shaft 3015 is provided with a liquid delivery chamber, which is connected to the liquid inlet 3024 of the double-layer cylindrical shell 301; the wall of the liquid delivery chamber of the drive shaft 3015 is provided with a liquid delivery port, which connects the liquid delivery chamber of the drive shaft 3015 and the crushing chamber 3014 of the double-layer cylindrical shell 301. In this way, liquid can be uniformly delivered to the foaming material in the crushing chamber 3014 at different positions on a circumference within the crushing chamber 3014 through the liquid inlet 3024 on the drive shaft 3015, which is driven to rotate by the driven turbine 3016, thereby fully wetting the foaming material and making it easier to crush. In addition, by uniformly delivering liquid into the crushing chamber 3014, the heat generated by friction with the foaming material in the crushing chamber 3014 can be effectively dissipated, thereby suppressing the spontaneous combustion phenomenon that may occur during the crushing of the foaming material (e.g., coal).

[0109] In one embodiment, the drive shaft 3015 has a length of 300 mm and a liquid inlet diameter of 5 mm.

[0110] See Figure 11 As shown, in one embodiment, the liquid delivery ports on the wall of the liquid delivery chamber of the drive shaft 3015 are symmetrically distributed, which helps to uniformly deliver liquid to the foaming material in the crushing chamber 3014.

[0111] After the foamed material enters the crushing chamber 3014 through the feed inlet 3012, it slides downwards under the action of gravity. (See attached image) Figure 11 As shown, in one embodiment, the liquid inlets are arranged in increasing order along the flow direction of the liquid in the liquid delivery chamber of the drive shaft 3015. This improves the mixing effect between the foaming material and the liquid delivered into the crushing chamber 3014 via the liquid delivery pipe. In one embodiment, the liquid inlets are arranged sequentially in the order of 2, 4, and 6 along the flow direction of the liquid in the liquid delivery chamber of the drive shaft 3015.

[0112] See Figure 1 As shown, in one embodiment, the coal mine underground solid slag foam integrated vehicle-mounted device for sealing the target area further includes a mobile component 4, which includes a first track 401, a second track 402, and a load-bearing plate 403 connected to the first track 401 and the second track 402.

[0113] In one embodiment, the mobile component 4 may be a mobile vehicle group.

[0114] See Figure 1 As shown, in one embodiment, the hydraulic crushing device 3 includes a connecting seat, which is disposed on the load-bearing plate 403. For example, the connecting seat of the hydraulic crushing device 3 is provided with a connecting hole through which a bolt 405 can pass, and the hydraulic crushing device 3 can be fixed on the load-bearing plate 403 by means of a detachable nut 404 and a bolt 405.

[0115] See Figure 1As shown, in one embodiment, the air inlet pipe connected to the foaming device 1 passes through the connecting seat of the hydraulic crushing device 3, connecting the foaming device 1 and the hydraulic crushing device 3.

[0116] In one embodiment, the moving component 4 can be hydraulically driven to perform spray fire extinguishing operations above the drainage ditch on the side of the tunnel.

[0117] See Figures 12 to 14 As shown, the foam generated by the coal mine underground solid slag foam integrated vehicle-mounted device used to seal the target area can be used not only for fire extinguishing but also for sealing leaking areas.

[0118] Underground coal mines generally include goaf (5), coal seam (6), and roadways. Roadways generally include return airway (7) and intake airway (8). In the high-risk areas within the roadways, spontaneous combustion of coal is prone to occur.

[0119] In one embodiment, before spraying, the sections are divided according to the single-line operation of horizontal and inclined roadways and vertical shafts. Then, the operation area is sprayed in a cyclic manner by a coal mine underground solid slag foam integrated vehicle-mounted device for sealing the target area.

[0120] Specifically, a vehicle-mounted device integrating solidification foam in coal mines is used to spray layers of foam onto the target area. Starting from the initial spray point, multiple layers of foam are sprayed sequentially according to a pre-set working order until the foam thickness reaches the specified level, thus saving operation time and improving work efficiency. During spraying, the walls are sprayed first, then the arches. When spraying walls, start from the foundation and proceed from bottom to top; when spraying arches, start from the arch foot and then the arch top. Spraying should begin from the next section and proceed from bottom to top. Adjacent sections should be joined at an oblique angle, with a width twice the thickness. The spray nozzle should be perpendicular to the spray surface. In areas with cracks or depressions, fill and level the area first before proceeding with normal spraying. The distance from the spray nozzle to the spray surface should not exceed 1.0 meter. After spraying one layer of foam, wait for it to completely solidify before spraying the next layer.

[0121] In one embodiment, the sections for single-line blowout operations in horizontal and inclined roadways and vertical shafts are divided into 1.5–2.0 m sections, and the spraying speed of the foam spraying component 2 can reach 6 m / s. 3 / h, single spray thickness is 30-50mm, total spray thickness is 100-150mm.

[0122] In one embodiment, the coal mine underground solidification foam integrated vehicle-mounted device for sealing the target area operates in three shifts, accompanying personnel to and from work. When on duty, the device is taken to the work site by the staff, and when off duty, it is used as the staff leave, ensuring that it is used as soon as it is extracted. The spraying thickness of each layer is 50mm, and the spraying interval of each layer is its solidification time, which is 20 minutes.

[0123] In one embodiment, the underground coal mine solidification foam integrated vehicle-mounted device for sealing target areas can seal both the upper and lower corners. Specifically, the direction of the foam nozzle 202 can be adjusted according to the working area. The foam nozzle 202 can spray in a cyclical manner along the lower corner, simultaneously moving horizontally, and spraying back and forth three times. This allows the spray to form a columnar body with the optimal sealing effect along the shape of the tunnel wall, until the lower corner is completely sealed.

[0124] See Figure 12 As shown, in one embodiment, the coal mine underground solidification foam integrated vehicle-mounted device for sealing target areas can spray and seal enclosed spaces. For example, after spontaneous combustion of coal in a high-risk area generates an ignition point 9, foam can be sprayed onto the ignition point 9. After the slag, saline cement and modified foam in the foam mix and solidify, they form a sealed space with the roadway wall, isolating oxygen and thus achieving sealing and fire extinguishing. When there are cracks in the roadway wall that result in a large air leakage 10, foam can be sprayed onto the cracks. After the slag, saline cement and modified foam in the foam mix and solidify, the cracks are sealed, thereby reducing the air leakage 10.

[0125] In addition, when sealing enclosed spaces, the foam nozzle 202 sprays the foam in a reciprocating motion up and down in the desired direction, see [link / reference]. Figure 13 As shown, after the first spraying forms a thin foam wall, the process is repeated three times along the same path until a foam wall with a certain thickness that completely fits the alleyway wall is formed, which can further reduce air leakage and even achieve zero air leakage.

[0126] The various embodiments in this specification are described in a related manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.

[0127] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A coal mine downhole solid residue sealing and foaming integrated vehicle-mounted device for sealing a target area, characterized in that, The device includes a foaming apparatus with a collision foaming chamber. The collision foaming chamber includes a foaming material inlet, a collision foam outlet, and a tapered inner wall connecting the foaming material inlet and the collision foam outlet. The opening of the inner wall at the foaming material inlet is larger than the opening of the inner wall at the collision foam outlet. Baffles are axially staggered on the inner wall of the collision foaming chamber. Each baffle has an opening near its fixed end on the inner wall of the tapered collision foaming chamber. One side of the free end of each baffle has an arc-shaped protrusion. The baffles include a swirling baffle assembly, which includes a first baffle and a second baffle. The swirling side of the arc-shaped protrusion of the first baffle and the arc-shaped protrusion of the second baffle are intersected. The swirling sides are opposite each other, wherein the swirling side is the side of the arc-shaped protrusion that is biased towards the fixed end of the baffle; the foaming device further includes an acceleration chamber, which includes an acceleration inlet, an acceleration outlet, and a tapered inner wall connected to the acceleration inlet and the acceleration outlet, wherein the opening of the inner wall at the acceleration inlet is larger than the opening of the inner wall at the acceleration outlet, the acceleration inlet of the acceleration chamber is connected to the collision foam outlet of the collision foaming chamber, and the acceleration inlet is larger than the collision foam outlet of the collision foaming chamber; the foaming raw material inlet of the foaming device is connected to an air inlet pipe and a foaming material pipe, and the air inlet pipe is located at the center of the foaming raw material inlet of the foaming device.

2. The integrated vehicle-mounted device for sealing target areas in coal mines using solid slag foam as described in claim 1, characterized in that, The foam material tube is equipped with anti-backflow blades that can be bent unidirectionally along the feeding direction. Each anti-backflow blade is arc-shaped with a central angle of 120°. The anti-backflow blades can only bend unidirectionally along the feeding direction and cannot bend in the opposite direction. When the foam material accumulates and flows back, the anti-backflow blades can cross and close under the reverse push of the foam material to block the foam material tube.

3. The integrated vehicle-mounted device for sealing target areas in coal mines using solid slag foam as described in claim 2, characterized in that, The angle between the foaming material tube and the end face of the foaming raw material inlet of the foaming device is 40~50°.

4. The integrated vehicle-mounted device for sealing target areas in coal mines using solid slag foam as described in claim 1, characterized in that, It also includes a foam spraying component, which includes a spraying pipe and a foam nozzle with a receiving cavity. The foam inlet of the spraying pipe is connected to the impact foam outlet of the impact foaming cavity, and the foam outlet of the spraying pipe is connected to the receiving cavity of the foam nozzle. The cavity wall of the receiving cavity of the foam nozzle is provided with a foam jet channel that connects the receiving cavity to the outside, and the openings of the foam jet channel are arrayed on the cavity wall of the receiving cavity.

5. The integrated vehicle-mounted device for sealing target areas in coal mines using solid slag foam as described in claim 4, characterized in that, The foam jet channels are arranged in a vortex-like cluster, and the foam premixed liquid is sprayed out in a flat cuboid shape along the foam jet channels. Multiple groups of flat cuboid foam can be tilted and interact to form a columnar foam.

6. The integrated vehicle-mounted device for sealing target areas in coal mines using solid slag foam as described in claim 4, characterized in that, A ball bearing is provided at the foam inlet of the spray pipe. By impacting the inner wall of the spray pipe, the spray pipe can swing around the ball bearing, thereby driving the foam nozzle connected to the spray pipe to swing.

7. The integrated vehicle-mounted device for sealing target areas in coal mines using solid slag foam as described in claim 4, characterized in that, The foam spraying component also includes an outer inlay shell, and an embedded axial bearing is provided between the spraying pipe and the outer inlay shell. The spraying pipe of the foam spraying component can rotate around the axis inside the outer inlay shell of the foam spraying component, while further mixing the foam premix liquid.

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