A mobile fire extinguishing device for safe operation in coal mines

Abstract

The present invention discloses a mobile fire extinguishing device for safe operation in underground coal mines, which relates to the technical field of mine fire extinguishing, including a frame, wherein a fire extinguishing unit is integrated on the frame, and bases are symmetrically installed at the bottom of both sides of the frame, and the bases are elastically connected to support parts through elastic parts, and the support parts can move along the outer side of the track and retract under pressure through the elastic parts, and the side of the support parts is provided with an engaging part that can be embedded in the groove on the outer side of the mine track; a mobile component is rotatably installed on the side of the frame through a hinge shaft, and a driving wheel is rotatably provided at its end, and the driving wheel can roll with the corner on the inner side of the top of the mine track; a telescopic driving part, whose two ends are respectively hinged between the frame and the mobile component, and is used to drive the mobile component to rotate around the hinge shaft; a trigger part is elastically slidably arranged at the bottom of the mobile component; through the track sharing and dual-mode switching design, the compatible use of the fire extinguishing device and the mine car track is achieved, thereby improving the response speed and fire extinguishing efficiency of underground fires.

Description

Technical Field

[0001] The present invention relates to the technical field of mine fire extinguishing, in particular to a mobile fire extinguishing device for safe operation in underground coal mines. Background Art

[0002] Coal mines operate in complex environments, and fire is one of the major hazards threatening mine safety. Due to the cramped underground space, poor ventilation, and accumulation of flammable materials (such as coal dust and gas), once a fire occurs, it spreads rapidly and is difficult to extinguish, easily causing casualties and significant economic losses. Traditional underground fire extinguishing equipment often uses fixed or manually transported equipment, which has the following technical drawbacks:

[0003] Existing mobile fire-fighting equipment typically relies on dedicated tracks or independent transport systems, independent of the mine's main transport tracks (mining tracks). This results in inefficient equipment deployment and a lack of rapid fire response. Underground track resources are limited, and if traditional fire-fighting equipment occupies track for extended periods, it can interfere with the normal movement of mine cars and other equipment, impacting production efficiency. When a fire breaks out, manually operated fire-fighting equipment takes time to reach the scene, while fixed equipment has a limited coverage area, making it difficult to meet the emergency needs of multiple fires.

[0004] To solve the above problems, technicians in this field have tried to develop mobile fire-fighting devices based on the main mine track, but there are still some shortcomings: for example, some designs require the laying of additional dedicated tracks or the modification of existing tracks, which increases construction costs; under normal conditions, the fire-fighting device needs to occupy track space for a long time, or requires frequent manual intervention to avoid mine cars, which is complicated to operate and has low safety; when a fire occurs, the device needs to be started from a fixed position and move along the track, the response time is long, and rescue is easily delayed due to track obstacles (such as mine cars). Summary of the Invention

[0005] The purpose of the present invention is to provide a mobile fire extinguishing device for safe operation in coal mines. Through track sharing and dual-mode switching design, the fire extinguishing device can be used compatibly with the mine car track, thereby improving the response speed and fire extinguishing efficiency of underground fires.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solution: a mobile fire extinguishing device for safe operation in underground coal mines, comprising a frame, a fire extinguishing unit integrated on the frame, bases symmetrically mounted on the bottoms of both sides of the frame, the bases being elastically connected to support portions via elastic members, the support portions being able to move along the outer side of a track and retract under pressure via the elastic members, and the side edges of the support portions being provided with engaging portions capable of being embedded in grooves on the outer side of the mining track;

[0007] The moving assembly is rotatably mounted on the side of the frame through a hinge shaft, and a driving wheel is rotatably provided at its end, and the driving wheel can roll with the corner inside the top of the mining track;

[0008] The telescopic driving member has two ends hinged between the frame and the moving assembly, and is used to drive the moving assembly to rotate around the hinge axis;

[0009] The trigger part is elastically slidably arranged at the bottom of the moving component; when the moving component rotates to the outside of the top of the mining track, the trigger part presses the supporting part by contacting the mining track, so that the engaging part is separated from the mining track.

[0010] As a further solution of the present invention, the mobile component includes:

[0011] The housing is rotatably mounted on the frame via a hinge shaft, and the driving wheels are linearly arranged inside the housing;

[0012] The driving motor is installed in the housing, and its output shaft is drivingly connected to the driving wheel;

[0013] The locking assembly is installed between the driving wheel and the housing. It is used to lock the remaining driving wheels when the first driving wheel leaves the mining track to prevent the frame from slipping off the end of the track.

[0014] The protective component is installed between the drive motor and the drive wheel. It is used to disconnect the power transmission when the drive wheel is locked to prevent the output end of the drive motor from being impacted.

[0015] As a further solution of the present invention, a drive shaft is rotatably arranged in the housing, and the drive shaft is axially slidably connected to the drive wheel via a flat key;

[0016] The plurality of driving wheels are connected to a synchronous frame for common rotation, and a one-way limiter is slidingly provided on the inner side of the housing;

[0017] A spring piece is fixedly provided at the bottom of the one-way limiter. When the spring piece contacts the mining track, the one-way limiter is driven to approach the drive shaft, thereby triggering the one-way limit of the drive wheel.

[0018] As a further solution of the present invention, the one-way limiter includes:

[0019] A convex ring is fixedly arranged in the driving wheel;

[0020] A bracket is slidably disposed in the housing and is capable of radially moving relative to the driving wheel;

[0021] A one-way limiting member is fixed on the bracket and is used to limit the convex ring in one direction;

[0022] The reset member is arranged between the driving wheel and the housing and is used for resetting the driving wheel.

[0023] As a further solution of the present invention, the first driving wheel is slidably connected to the housing via a sliding groove;

[0024] The locking assembly comprises:

[0025] A limit frame is elastically and slidably arranged in the housing, and the limit frame is fixed with teeth;

[0026] The limiting tooth is fixed on the driving shaft;

[0027] When the first driving wheel leaves the mining track, the limit frame drops synchronously with the driving wheel, and its teeth are embedded in the limit teeth to achieve locking.

[0028] As a further solution of the present invention, the protection component includes:

[0029] A sliding sleeve is elastically slidably arranged on the output shaft of the driving motor and rotates synchronously;

[0030] The teeth are fixed on the end of the sliding sleeve and the adjacent end of the limiting tooth, and the teeth are chamfered;

[0031] When the driving wheel is locked, the sliding sleeve and the limiting tooth are disengaged from each other by disengaging the teeth.

[0032] As a further solution of the present invention, the trigger unit includes:

[0033] a spring plate disposed in the housing;

[0034] a wedge-shaped block, slidably disposed in the housing and elastically connected to the spring plate;

[0035] A trigger top plate is installed on the top of the fitting part;

[0036] When the housing rotates and contacts the mining track, the wedge-shaped block drives the engaging portion to disengage from the mining track by triggering the top plate.

[0037] As a further solution of the present invention, the bottom and side walls of the engaging portion are respectively provided with strip grooves and mounting grooves;

[0038] The strip groove is used to avoid the bottom connector of the mining track;

[0039] The mounting grooves are arranged in a linear array and are used for staggering to avoid protrusions at the connection between the mining track and the rails.

[0040] As a further solution of the present invention, the telescopic driving member is a telescopic motor.

[0041] Compared with the prior art, the present invention has the following beneficial effects:

[0042] 1. In the present invention, the end engaging portion of the support portion is embedded in the outer groove of the track, and the support portion is installed on the outer side of the mine track, thereby avoiding occupying the space of the main transportation track of the mine and not interfering with the normal operation of the mine car and other equipment, thereby ensuring the smooth operation of the mine production;

[0043] 2. In the present invention, the mobile assembly is driven to rotate by a telescopic driving member, the trigger portion contacts the mine track and squeezes the support portion, causing the engaging portion to disengage from the mine track. The driving wheel then abuts against the inner corner of the mine track. This allows the existing mine track to be used to quickly reach the fire scene, effectively improving the mine's ability to respond to fires and providing a solid guarantee for safe production in the mine.

[0044] 3. In the present invention, the frame is lifted as a whole by rotating the mobile assembly around the outer corners of the mining track, thereby enhancing the passability of the device, making it easy to cross obstacles and ensuring that the device can smoothly reach the fire scene. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0046] Figure 1 This is a schematic diagram of the use scenario of the present invention;

[0047] Figure 2 It is a schematic diagram of the overall structure of the present invention;

[0048] Figure 3 This is a schematic diagram of the structure of the mobile components and their connection relationships of the present invention;

[0049] Figure 4 For the present invention Figure 3 A in the middle is an enlarged structural diagram;

[0050] Figure 5 This is a schematic diagram of the cross-sectional structure of the mobile component of the present invention;

[0051] Figure 6 For the present invention Figure 5 The enlarged structural diagram at B in the middle;

[0052] Figure 7 For the present invention Figure 5 The enlarged structural diagram at C in the middle;

[0053] Figure 8 This is a schematic structural diagram of the locking assembly and its connection relationship of the present invention;

[0054] Figure 9 For the present invention Figure 8 The enlarged structural diagram at D in the middle;

[0055] Figure 10 This is a schematic diagram of the wedge block and its connection relationship structure of the present invention;

[0056] Figure 11 A schematic diagram of the motion trajectory of the mobile component of the present invention;

[0057] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0058] 1. Frame; 2. Base; 4. Support part; 41. Fitting part; 42. Strip groove; 43. Mounting groove; 5. Moving assembly; 51. Driving wheel; 52. Housing; 53. Driving motor; 54. Locking assembly; 55. Protective assembly; 6. Corner; 7. Telescopic driving part; 8. Articulated shaft; 9. Trigger part; 91. Spring plate; 92. Wedge block; 93. Trigger top plate; 10. Fire extinguishing unit; 11. Driving shaft; 12. Flat key; 13. Synchronous frame; 14. One-way limiter; 141. Raised ring; 142. Bracket; 143. One-way limiter; 144. Reset member; 15. Spring clip; 17. Limiting frame; 171. Tooth; 18. Limiting tooth; 19. Sliding sleeve; 20. De-toothing. DETAILED DESCRIPTION

[0059] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0060] See also Figures 1-11 The present invention provides a technical solution: a mobile fire extinguishing device for safe operation in underground coal mines, comprising a frame 1, on which a fire extinguishing unit 10 is integrated, the fire extinguishing unit 10 comprising a storage container and an injection pipeline, the injection pipeline being arranged at the top of the frame 1 and being connected to the storage container, and different fire extinguishing solutions or inert gases can be stored in the storage container according to needs, for example, the fire extinguishing device arranged in the mining area of ​​the mine is filled with a solution for extinguishing fires caused by spontaneous combustion of coal (including but not limited to water), and the fire extinguishing device arranged in the equipment storage area of ​​the mine is filled with a solution for extinguishing fires caused by combustion of electric circuits (including but not limited to ammonium phosphate dry powder fire extinguishing agent), thereby achieving effective response to different types of fires, bases 2 are symmetrically mounted on the bottom of both sides of the frame 1, the base 2 is elastically connected to a support part 4 through an elastic member (the elastic member includes but not limited to a spring and a spring plate), the support part 4 can fit and move along the outer side of the track and retract under pressure through the elastic member, and a fitting part 41 is provided on the side of the support part 4 that can be embedded in the groove on the outer side of the mining track;

[0061] The moving assembly 5 is rotatably mounted on the side of the frame 1 through the hinge shaft 8, and a driving wheel 51 is rotatably provided at its end. The driving wheel 51 can roll with the corner 6 on the inner side of the top of the mining track; the driving wheel 51 is provided with a horizontal section and an inclined section. The horizontal section rolls with the top of the mining track, and the inclined section rolls with the inner side of the top of the mining track (see Figure 11 );

[0062] The telescopic driving member 7 has two ends hinged between the frame 1 and the moving assembly 5, and drives the moving assembly 5 to rotate around the hinge shaft 8 by telescoping, so that the moving assembly 5 moves closer to or away from the mining track;

[0063] The trigger portion 9 is elastically slidably arranged at the bottom of the moving assembly 5; when the moving assembly 5 rotates to the outside of the top of the mining track, the trigger portion 9 presses the support portion 4 by contacting the mining track, causing the interlocking portion 41 to detach from the mining track; at the same time, the moving assembly 5 rotates around the outer corner 6 of the mining track, thereby raising the frame 1 as a whole, which can increase the height of the fire extinguishing device and thus improve the passability of the fire extinguishing device. It is suitable for obstacles on the outside of the mining track, such as coal residues dropped from mine cars; the support portion 4 and the interlocking portion 41 are raised synchronously with the frame 1, which can reduce the obstruction caused by the connection at the bottom of the mining track;

[0064] Specifically, several fire extinguishing devices are set up along the mine tracks according to needs. When a fire occurs somewhere, the fire extinguishing device is arranged nearby to go to the fire area, realizing rapid emergency response to multiple fires, expanding the fire extinguishing coverage, effectively improving the mine's ability to deal with multiple fires, and providing strong guarantees for mine safety production.

[0065] Under normal conditions or when avoiding, the fire extinguishing device is inserted into the groove outside the track through the interlocking portion 41 at the end of the support portion 4, and the support portion 4 is installed on the outside of the mining track to provide stable support for the frame 1. The optional installation of a roller with power output in the interlocking portion 41 allows the fire extinguishing device to move slowly during inspections under normal conditions, reducing the total number of fire extinguishing devices, facilitating the passage of mine cars and track transportation equipment, and reducing equipment costs and management difficulties.

[0066] When a fire occurs, the telescopic driving member 7 drives the moving assembly 5 to rotate around the hinge shaft 8 by extending, and the driving wheel 51 and the trigger part 9 on the moving assembly 5 approach the mine track. The trigger part 9 first contacts the mine track. The trigger part 9 is restricted by the mine track and moves relative to the moving assembly 5. The trigger part 9 squeezes the support part 4 to make the fitting part 41 break away from the interference with the outer groove of the mine track; the fitting part 41 is still in the outer groove of the mine track. On the one hand, when the fitting part 41 moves along the mine track, it can avoid the protruding part of the connection between the mine tracks. On the other hand, when the frame 1 tilts, the fitting part 41 tilts synchronously and interferes with the outer groove of the mine track, playing a supporting role for the frame 1 and preventing the frame 1 from derailing.

[0067] At the same time, the moving assembly 5 is still in a state of small-angle inclination and conflicts with the mine track. At this time, the moving assembly 5 plays the role of supporting the frame 1. The frame 1 stands on the mine track through the moving assembly 5, and the moving assembly 5 continues to rotate until the driving wheel 51 conflicts with the inner corner 6 of the mine track. Under the joint action of the driving wheels 51 on both sides and the mine track, the frame 1 is centered relative to the mine track and can rise slightly, so that the frame 1, the supporting part 4 and the fitting part 41 rise, thereby improving the passability of the frame 1 and avoiding interference of the bottom connection of the mine track with the fitting part 41; the rotation of the driving wheel 51 can drive the frame 1 to move along the mine track, thereby increasing the moving speed of the frame 1, reducing the time for the fire extinguishing device to reach the fire point, and avoiding further expansion of the fire point;

[0068] The mobile assembly 5 is driven to rotate around the hinge shaft 8 through the telescopic driving member 7, so that the mobile assembly 5 is close to the mine track, and the trigger part 9 contacts the mine track to squeeze the support part 4, so that the interlocking part 41 is disengaged from the mine track. At the same time, the mobile assembly 5 rotates around the outer corner 6 of the mine track to lift the frame 1 as a whole, thereby increasing the height of the fire extinguishing device, thereby enhancing the passability and effectively avoiding obstacles that hinder the movement of the device, in order to cope with obstacles on the outside of the mine track, such as coal residues dropped from a mine car.

[0069] Based on the above analysis, under normal circumstances, the end engaging portion 41 of the support portion 4 is embedded in the outer groove of the track, and the support portion 4 is installed on the outer side of the mine track to avoid occupying the space of the main transport track of the mine, and will not interfere with the normal operation of the mine car and other equipment, thereby ensuring the smooth progress of mine production; when a fire occurs, the telescopic drive part 7 drives the moving component 5 to rotate, the trigger part 9 contacts the mine track, and squeezes the support part 4, so that the engaging portion 41 is disengaged from the mine track, and the driving wheel 51 is in contact with the inner corner 6 of the mine track, and can use the existing mine track to quickly reach the fire scene, effectively improving the mine's ability to respond to fires, and providing a solid guarantee for the safe production of the mine; at the same time, the moving component 5 rotates around the outer corner 6 of the mine track to lift the frame 1 as a whole, thereby enhancing the passability of the device, and being able to easily cross obstacles to ensure that the device can smoothly reach the fire scene.

[0070] As a further solution of the present invention, the mobile component 5 includes:

[0071] The housing 52 is rotatably mounted on the frame 1 via the hinge shaft 8. The drive wheels 51 are linearly arranged on the inner side of the housing 52 (the inner side of the housing 52 in this embodiment refers to the side adjacent to the housing 52). The plurality of drive wheels 51 can improve the stability of the frame 1 and prevent the frame 1 from tilting and derailing.

[0072] The drive motor 53 is installed in the housing 52, and its output shaft is connected to the drive wheel 51; the drive wheel 51 drives the housing 52 to move relative to the mining track, thereby causing the frame 1 to move along the mining track;

[0073] The locking assembly 54 is installed between the driving wheel 51 and the housing 52, and is used to lock the remaining driving wheels 51 when the first driving wheel 51 is off the mining track, thereby preventing the frame 1 from slipping off the end of the track;

[0074] The protection component 55 is installed between the drive motor 53 and the drive wheel 51, and is used to cut off the power transmission when the drive wheel 51 is locked, thereby preventing the output end of the drive motor 53 from being impacted;

[0075] For details, see Figure 2 、 Figure 3 and Figure 5 When the telescopic driving member 7 is extended, the housing 52 rotates around the hinge shaft 8 toward the mine track, so that the trigger part 9 contacts the mine track and triggers the interlocking part 41 to disengage from the mine track, reducing the impact of the mine track on the fast-moving frame 1; when the driving wheel 51 contacts the inner corner 6 of the mine track, the driving motor 53 is started, driving the driving wheel 51 to rotate, thereby moving the frame 1 along the mine track, so that the fire extinguishing device switches to use the inner side of the mine track, reducing the impact of the coal accumulated on the outer side of the mine track on the movement of the fire extinguishing device, and speeding up the speed of the fire extinguishing device reaching the fire scene;

[0076] When the frame 1 moves to the end of the mining track, the first driving wheel 51 will first leave the mining track, and at the same time trigger the locking assembly 54 to lock the remaining driving wheels 51 to prevent the frame 1 from slipping off the track end. Figure 2 and Figure 3 , there are several driving wheels 51. At this time, the frame 1 is still supported at multiple points and will not fall in the forward direction due to inertia;

[0077] After the driving wheel 51 is locked, the protection component 55 disconnects the power transmission between the driving motor 53 and the driving wheel 51 to prevent the output end of the driving motor 53 from being damaged by impact;

[0078] As a further embodiment of the present invention, a drive shaft 11 is rotatably disposed within the housing 52. The drive shaft 11 is axially slidably connected to the drive wheel 51 via a flat key 12. The drive wheel 51 can rotate with the drive shaft 11 and can slide axially relative to the drive shaft 11.

[0079] The multiple drive wheels 51 are connected to the synchronous frame 13 for common rotation, and a one-way limiter 14 is slidably provided on the inner side of the housing 52 (same as above); the synchronous frame 13 can synchronize the axial displacement of the multiple drive wheels 51 along the drive shaft 11, so that the force on the drive wheels 51 is uniform, further improving the stability of the frame 1;

[0080] A spring piece 15 is fixedly provided at the bottom of the one-way limiter 14. When the spring piece 15 contacts the mining track, the one-way limiter 14 is driven to approach the drive shaft 11, triggering the one-way limit of the drive wheel 51. The one-way limiter 14 restricts the drive wheel 51 from moving away from the moving assembly 5.

[0081] Supplementary explanation: When rails expand due to heat but are constrained by fasteners and the trackbed, they develop internal axial compressive stress. Rails can be considered slender compressive rods, and buckling (instability) occurs when the compressive stress exceeds a critical value. Actual rails commonly exhibit initial outward bending at the micrometer level due to construction errors or long-term loads. Compressive stress at high temperatures amplifies this defect, leading to significant outward deflection (away from the track centerline) and increased spacing between rails.

[0082] For details, see Figure 1 、 Figure 5 and Figure 6 When a fire occurs in a mine, the temperature inside the mine rises rapidly. The mine track is affected by the temperature, the track stress decreases, and the mine track undergoes slight deformation, which will cause the track spacing to change. If the mine track deforms outward (away from the track centerline), the traditional drive wheel 51 (track wheel) does not have the function of displacement. The outward bending track will cause the track spacing to increase, causing the drive wheel 51 to deviate from the track, causing the fire extinguishing device to lose power source and unable to reach the fire scene in the first time;

[0083] In the present invention, when the driving wheel 51 moves to the mining track that is deformed outward, the driving wheel 51 can move outward of the mining track, that is, close to the moving component 5, to cope with the deformation of the mining track outward and avoid the driving wheel 51 from derailing.

[0084] When the moving assembly 5 rotates, the spring piece 15 on the one-way limiter 14 first contacts the mining track, and under the action of the spring piece 15, the one-way limiting function of the driving wheel 51 is triggered; when the moving assembly 5 rotates in the opposite direction, the spring piece 15 disengages from the mining track, releasing the one-way limiting function of the driving wheel 5 by the one-way limiter 14.

[0085] As a further solution of the present invention, the one-way limiter 14 includes:

[0086] The convex ring 141 is fixedly mounted in the driving wheel 51;

[0087] The bracket 142 is slidably disposed in the housing 52 and is capable of radially moving relative to the driving wheel 51;

[0088] A one-way limiting member 143 is fixed on the bracket 142 and is used to limit the convex ring 141 in one direction;

[0089] A reset member 144 is provided between the driving wheel 51 and the housing 52 and is used to reset the driving wheel 51;

[0090] For details, see Figure 5-Figure 9 When the driving wheel 51 contacts the mining track, the driving wheel 51 is in a free state, and the driving wheel 51 can move away from the moving assembly 5 to ensure that it can roll with the inner corner 6 of the mining track, adapting to the slight deformation of the mining track, and at the same time stretching the reset member 144, so that the reset member 144 is in a force storage state; when the spring piece 15 contacts the mining track, the bracket 142 drives the one-way limit member 143 to rise, and the one-way limit member 143 overlaps with the convex ring 141 axially along the driving shaft 11, and the one-way limit member 143 limits the convex ring 141 in one direction, so that the driving wheel 51 can only move toward the outside of the mining track (that is, toward the moving assembly 5). Under normal circumstances, the driving wheel 51 is restricted by the mining track and cannot approach the moving assembly 5. The reset member 144 will pull the driving wheel 51 toward the moving assembly 5, and when the driving wheel 51 moves to the outward curved track, the driving wheel 51 can maintain rolling cooperation with the mining track to avoid derailment.

[0091] After the spring piece 15 contacts the mining track, the bracket 142 pushes the one-way limiter 143 to fit tightly against the driving wheel 51 . When the convex ring 141 squeezes the one-way limiter 143 , the spring piece 15 deforms to provide space for the one-way limiter 143 .

[0092] As a further embodiment of the present invention, the first drive wheel 51 is slidably connected to the housing 52 via a slide groove. It should be noted that since the synchronization frame 13 and the first drive wheel 51 need to be able to move radially relative to the drive wheel 51, implementation means include but are not limited to clearance fit between the synchronization frame 13 and the drive wheel 51, that is, the synchronization frame 13 is mounted on the first drive wheel 51 and there is a gap between the synchronization frame 13 and the drive wheel 51, ensuring that the first drive wheel 51 can trigger the locking assembly 54 by displacement after leaving the mining track.

[0093] The locking assembly 54 includes:

[0094] The limiting frame 17 is elastically slidably disposed in the housing 52 and is fixed with teeth 171;

[0095] The limiting tooth 18 is fixed on the driving shaft 11;

[0096] See also Figure 5 、 Figure 6 and Figure 7 When the first driving wheel 51 leaves the mining track, the limit frame 17 drops synchronously with the driving wheel 51, and its teeth 171 are embedded in the limit teeth 18 to achieve locking; the remaining driving wheels 51 are locked to prevent the frame 1 from slipping off the end of the track.

[0097] As a further embodiment of the present invention, the protection component 55 includes:

[0098] The sliding sleeve 19 is elastically slidably disposed on the output shaft of the driving motor 53 and rotates synchronously;

[0099] The stripping teeth 20 are respectively fixed to the end of the sliding sleeve 19 and the adjacent end of the limiting tooth 18, and the stripping teeth 20 are provided with chamfers;

[0100] See also Figure 5 、 Figure 6 and Figure 8 When the driving wheel 51 is locked, the sliding sleeve 19 and the limiting tooth 18 are relatively disengaged through the tooth removal 20; the power transmission between the driving motor 53 and the driving wheel 51 is disconnected to prevent the output end of the driving motor 53 from being damaged by impact.

[0101] As a further solution of the present invention, the trigger unit 9 includes:

[0102] The spring plate 91 is disposed in the housing 52;

[0103] A wedge block 92 is slidably disposed in the housing 52 and elastically connected to the spring plate 91;

[0104] A trigger top plate 93 is mounted on the top of the fitting portion 41;

[0105] See also Figure 3 、 Figure 4 、 Figure 10 and Figure 11 When the housing 52 rotates and contacts the mining track, the wedge block 92 is located between the mining track and the trigger top plate 93. The wedge block 92 moves relative to the moving component 5 under the pressure of the mining track. The wedge block 92 synchronously drives the trigger top plate 93 to move, and the trigger top plate 93 drives the engaging portion 41 to separate from the mining track. When the engaging portion 41 moves along the mining track, it can avoid the protruding part of the connection between the mining tracks.

[0106] As a further solution of the present invention, a strip groove 42 and a mounting groove 43 are respectively formed on the bottom and side wall of the fitting portion 41; under normal conditions, the strip groove 42 can accommodate the protrusion at the bottom connection of the mining track, preventing the protrusion at the bottom connection of the mining track from affecting the movement of the frame. At the same time, the protrusion at the bottom connection of the mining track can limit the fitting portion 41 through the strip groove 42, preventing the fitting portion 41 from being separated from the mining track groove, thereby improving the stability of the frame 1;

[0107] The strip groove 42 is used to avoid the bottom connector of the mining track;

[0108] The mounting grooves 43 are arranged in a linear array, and are used to stagger and avoid the protrusions at the connection between the mine rails; the mounting grooves 43 are used to install rollers with power output, which can enable the fire extinguishing device to move slowly for inspection under normal conditions, improve the applicability of a single fire extinguishing device, and reduce the overall number of fire extinguishing devices; and the mounting grooves 43 used can be selected according to the connection method between the mine rails to avoid the protrusions at the connection between the mine rails.

[0109] As a further solution of the present invention, the telescopic drive member 7 is a telescopic motor; the telescopic motor adopts a threaded transmission connection method inside. On the one hand, compared with the hydraulic drive, it is less affected by temperature, and on the other hand, the extension and contraction power are uniform.

Claims

1. A mobile fire extinguishing device for safe operation in underground coal mines, comprising a frame (1), wherein a fire extinguishing unit (10) is integrated on the frame (1), and characterized in that: Bases (2) are symmetrically mounted on the bottoms of both sides of the frame (1); the bases (2) are elastically connected to support portions (4) via elastic members; the support portions (4) can move along the outer side of the track and retract under pressure via the elastic members; and the sides of the support portions (4) are provided with engaging portions (41) capable of being embedded in the grooves on the outer side of the mining track; The moving assembly (5) is rotatably mounted on the side of the frame (1) via a hinge shaft (8), and a driving wheel (51) is rotatably provided at its end, and the driving wheel (51) can roll with the corner (6) on the inner side of the top of the mining track; A telescopic driving member (7), the two ends of which are respectively hinged between the frame (1) and the moving assembly (5), and is used to drive the moving assembly (5) to rotate around the hinge shaft (8); The trigger portion (9) is elastically slidably arranged at the bottom of the moving assembly (5); when the moving assembly (5) rotates to the outside of the top of the mining track, the trigger portion (9) presses the support portion (4) by contacting the mining track, causing the engaging portion (41) to detach from the mining track.

2. The mobile fire extinguishing device according to claim 1, characterized in that: The mobile component (5) comprises: The outer shell (52) is rotatably mounted on the frame (1) via a hinge shaft (8), and the driving wheels (51) are linearly arranged inside the outer shell (52); A drive motor (53) is installed in the housing (52), and its output shaft is drivingly connected to the drive wheel (51); A locking assembly (54) is installed between the driving wheel (51) and the housing (52) and is used to lock the remaining driving wheels (51) when the first driving wheel (51) leaves the mining track to prevent the frame (1) from slipping off the end of the track; The protection component (55) is installed between the drive motor (53) and the drive wheel (51) and is used to disconnect the power transmission when the drive wheel (51) is locked, thereby preventing the output end of the drive motor (53) from being impacted.

3. The mobile fire extinguishing device according to claim 2, characterized in that: A drive shaft (11) is rotatably disposed in the housing (52), and the drive shaft (11) is axially slidably connected to the drive wheel (51) via a flat key (12); The plurality of driving wheels (51) are connected to a synchronous frame (13) for common rotation, and a one-way limiter (14) is slidably provided inside the housing (52); A spring piece (15) is fixedly provided at the bottom of the one-way limiter (14). When the spring piece (15) contacts the mining track, the one-way limiter (14) is driven close to the drive shaft (11), thereby triggering the one-way limiting of the drive wheel (51).

4. The mobile fire extinguishing device according to claim 3, characterized in that: The one-way limiter (14) comprises: A convex ring (141) is fixedly mounted in the driving wheel (51); A bracket (142) is slidably disposed in the housing (52) and is capable of radially moving relative to the drive wheel (51); A one-way limiting member (143) is fixed on the bracket (142) and is used to limit the convex ring (141) in one direction; The reset member (144) is disposed between the driving wheel (51) and the housing (52) and is used to reset the driving wheel (51).

5. The mobile fire extinguishing device according to claim 2, characterized in that: The driving wheel (51) at the first position is slidably connected to the housing (52) via a sliding groove; The locking assembly (54) includes: A limiting frame (17) is elastically and slidably arranged in the housing (52), and the limiting frame (17) is fixedly provided with teeth (171); A limiting tooth (18) is fixed on the drive shaft (11); When the first driving wheel (51) leaves the mining track, the limiting frame (17) is synchronously lowered along with the driving wheel (51), and its teeth (171) are embedded in the limiting teeth (18) to achieve locking.

6. The mobile fire extinguishing device according to claim 2, characterized in that: The protection component (55) includes: A sliding sleeve (19) is elastically slidably disposed on the output shaft of the drive motor (53) and rotates synchronously; The stripping teeth (20) are respectively fixed to the end of the sliding sleeve (19) and the adjacent end of the limiting teeth (18), and the stripping teeth (20) are provided with chamfers; When the driving wheel (51) is locked, the sliding sleeve (19) and the limiting tooth (18) are relatively disengaged through the disengaging tooth (20).

7. The mobile fire extinguishing device according to claim 1, characterized in that: The triggering unit (9) includes: A spring plate (91) is disposed in the housing (52); A wedge-shaped block (92) is slidably disposed in the housing (52) and elastically connected to the spring plate (91); A trigger top plate (93) is mounted on the top of the engaging portion (41); When the housing (52) rotates and contacts the mining track, the wedge block (92) drives the engaging portion (41) to disengage from the mining track by triggering the top plate (93).

8. The mobile fire extinguishing device according to claim 1, characterized in that: The bottom and side walls of the engaging portion (41) are respectively provided with a strip groove (42) and a mounting groove (43); The strip-shaped groove (42) is used to avoid the bottom connecting piece of the mining track; The mounting grooves (43) are arranged in a linear array and are used for staggering to avoid protrusions at the connection between the mining track and the rails.

9. The mobile fire extinguishing device according to claim 1, characterized in that: The telescopic driving member (7) is a telescopic motor.

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