Movable fire extinguishing device for safe operation in underground coal mine

Abstract

The invention discloses a movable fire extinguishing device for underground coal mine safety operation, and relates to the technical field of mine fire extinguishment, the movable fire extinguishing device comprises a frame body, a fire extinguishing unit is integrated on the frame body, bases are symmetrically installed at the bottoms of the two sides of the frame body, and the bases are elastically connected with supporting parts through elastic pieces; the supporting part can move in an attached mode along the outer side of the track through an elastic piece and retract after being pressed, and an embedding part capable of being embedded into a groove in the outer side of the mine track is arranged on the side edge of the supporting part. The moving assembly is rotationally installed on the side edge of the frame body through a hinge shaft, and a driving wheel is rotationally arranged at the end of the moving assembly and can be in rolling fit with the corner of the inner side of the top of the mining track; the two ends of the telescopic driving part are hinged between the frame body and the moving assembly correspondingly, and the telescopic driving part is used for driving the moving assembly to rotate around the hinge shaft; the triggering part is elastically and slidably arranged at the bottom of the moving assembly; through the rail sharing and dual-mode switching design, compatible use of the fire extinguishing device and the mine car rail is achieved, and the underground fire response speed and the fire extinguishing efficiency are improved.

Description

Technical Field

[0001] The 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] The working environment of coal mines is complex, and fire is one of the main disasters that threaten the safe production of mines. Due to the small space underground, poor ventilation conditions, and accumulation of flammable materials (such as coal dust and gas), once a fire occurs, the fire spreads quickly and is difficult to extinguish, which can easily cause casualties and major economic losses. Traditional underground fire extinguishing devices mostly use fixed or manually transported equipment, which has the following technical defects: Existing mobile fire-fighting devices usually rely on dedicated tracks or independent transportation systems, which are independent of the main transportation tracks (mining tracks) of the mine, resulting in low equipment deployment efficiency and inability to respond to fires quickly. Underground track resources are tight, and if traditional fire-fighting devices occupy the tracks for a long time, they will interfere with the normal passage of mine cars and other equipment, affecting production efficiency. When a fire occurs, it takes time for manually operated fire-fighting equipment to arrive at the scene, and the coverage of fixed devices is limited, making it difficult to meet the emergency needs of multiple fires.

[0003] To solve the above problems, technicians in this field have tried to develop mobile fire-fighting devices based on the main track of the mine, 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

[0004] 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 underground fire response speed and fire extinguishing efficiency.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solutions: 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 installed at the bottom of both sides of the frame, the bases elastically connected to support parts through elastic parts, the support parts can fit and move along the outer side of the track through the elastic parts and retract under pressure, 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 mining track; The moving assembly is rotatably mounted on the side of the frame body through a hinge shaft, and a driving wheel is rotatably arranged at its end, and the driving wheel can roll with the corner inside the top of the mining track; A telescopic driving member, with both ends respectively hinged between the frame body and the moving assembly, is used to drive the moving assembly to rotate around the hinge axis; A triggering part is elastically and slidably arranged at the bottom of the moving assembly; when the moving assembly rotates to the outer side of the top of the mining track, the triggering part presses the supporting part by touching the mining track, so that the fitting part is separated from the mining track.

[0006] As a further solution of the present invention, the moving assembly includes: A housing is rotatably arranged on the frame body through a hinge axis, and the driving wheels are linearly arranged inside the housing; A driving motor is installed inside the housing, and its output shaft is in transmission connection with the driving wheels; A locking assembly is installed between the driving wheels and the housing, and is used to lock the remaining driving wheels when the first driving wheel is separated from the mining track, so as to prevent the frame body from slipping off the end of the track; A protection assembly is installed between the driving motor and the driving wheels, and is used to disconnect the power transmission when the driving wheels are locked, so as to prevent the output end of the driving motor from being impacted.

[0007] As a further solution of the present invention, a driving shaft is rotatably arranged inside the housing, and the driving shaft is axially slidably connected with the driving wheels through a flat key; A plurality of the driving wheels are jointly rotatably connected with a synchronous frame, and a one-way limiter is slidably arranged inside the housing; A spring piece is fixedly arranged at the bottom of the one-way limiter, and when the spring piece touches the mining track, it drives the one-way limiter to approach the driving shaft, triggering the one-way limit of the driving wheels.

[0008] As a further solution of the present invention, the one-way limiter includes: A convex ring is fixedly arranged inside the driving wheel; A bracket is slidably arranged inside the housing and can move radially relative to the driving wheel; A one-way limiting member is fixedly arranged on the bracket and is used to perform one-way limit on the convex ring; A reset member is arranged between the driving wheel and the housing and is used to reset the driving wheel.

[0009] As a further solution of the present invention, the first driving wheel is slidably connected with the housing through a chute; The locking assembly includes: A limiting frame is elastically and slidably arranged inside the housing, and teeth are fixedly arranged on the limiting frame; Limiting teeth are fixedly arranged on the driving shaft; When the first driving wheel is separated from the mining track, the limiting frame synchronously descends with the driving wheel, and its teeth are embedded into the limiting teeth to achieve locking.

[0010] As a further solution of the present invention, the protection assembly includes: The sliding sleeve is elastically and slidably arranged on the output shaft of the driving motor and rotates synchronously; The disengaging teeth are respectively fixedly arranged at the adjacent ends of the end part of the sliding sleeve and the limiting teeth, and chamfers are arranged on the disengaging teeth; When the driving wheel is locked, the sliding sleeve and the limiting teeth are disengaged from meshing with each other through the disengaging teeth.

[0011] As a further scheme of the present invention, the triggering part includes: The spring plate is arranged inside the housing; The wedge-shaped block is slidably arranged inside the housing and is elastically connected with the spring plate; The triggering top plate is installed at the top of the fitting part; When the housing rotates and abuts against the mine track, the wedge-shaped block drives the fitting part to disengage from the mine track through the triggering top plate.

[0012] As a further scheme of the present invention, a strip-shaped groove and a mounting groove are respectively formed at the bottom and the side wall of the fitting part; The strip-shaped groove is used to avoid the bottom connecting piece of the mine track; The mounting grooves are arranged in a linear array and are used to stagger and avoid the protrusions at the joints of the rails of the mine track.

[0013] As a further scheme of the present invention, the telescopic driving part is a telescopic motor.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. In the present invention, the fitting part at the end of the supporting part is embedded into the outer groove of the track, and the supporting part is installed on the outside of the mine track, avoiding occupying the space of the main transportation track in the mine and not interfering with the normal operation of mine cars and other equipment, thus ensuring the smooth progress of mine production; 2. In the present invention, the telescopic driving part drives the moving component to rotate, the triggering part contacts the mine track, and presses the supporting part, so that the fitting part disengages from the mine track, and the driving wheel abuts against the inner corner of the mine track, enabling it to quickly reach the fire site by using the existing mine track, effectively improving the mine's ability to respond to fires and providing a solid guarantee for the safe production of the mine; 3. In the present invention, the moving component rotates around the outer corner of the mine track, lifting the whole frame body, enhancing the passability of the device, enabling it to easily cross obstacles and ensuring that the device can smoothly reach the fire site. Description of the Drawings

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention, and those of ordinary skill in the art can also obtain other drawings based on these drawings without creative efforts.

[0016] Figure 1 Schematic diagram of the usage scenario of the present invention; Figure 2 Schematic diagram of the overall structure of the present invention; Figure 3 Schematic diagram of the moving component of the present invention and its connection relationship; Figure 4 For the present invention Figure 3 Enlarged structure diagram at position A in; Figure 5 Schematic diagram of the cross-sectional structure of the moving component of the present invention; Figure 6 For the present invention Figure 5 Enlarged structure diagram at position B in; Figure 7 For the present invention Figure 5 Enlarged structure diagram at position C in; Figure 8 Schematic diagram of the locking component of the present invention and its connection relationship; Figure 9 For the present invention Figure 8 Enlarged structure diagram at position D in; Figure 10 Schematic diagram of the wedge block of the present invention and its connection relationship; Figure 11 Schematic diagram of the movement track of the moving component of the present invention; In the attached drawings, the list of components represented by each reference numeral is as follows: 1. Frame body; 2. Base; 4. Support part; 41. Fitting part; 42. Strip-shaped groove; 43. Installation groove; 5. Moving component; 51. Driving wheel; 52. Outer shell; 53. Driving motor; 54. Locking component; 55. Protection component; 6. Corner; 7. Telescopic driving part; 8. Hinge 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. Convex ring; 142. Bracket; 143. One-way limiting part; 144. Reset part; 15. Elastic piece; 17. Limiting frame; 171. Tooth; 18. Limiting tooth; 19. Sliding sleeve; 20. Tooth disengaging. Detailed implementation manners

[0017] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0018] Please refer to Figures 1-11 , the present invention provides a technical solution: a mobile fire extinguishing device for safe operation in coal mines, including a frame 1, on which a fire extinguishing unit 10 is integrated. The fire extinguishing unit 10 includes a storage container and a spraying pipeline. The spraying pipeline is arranged on the top of the frame 1 and is connected to the storage container. Different fire extinguishing solutions or inert gases can be stored in the storage container according to requirements. For example, the fire extinguishing device arranged in the mining area of the mine is filled with a fire extinguishing agent 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 fire extinguishing agent for extinguishing fires caused by circuit combustion (including but not limited to ammonium phosphate dry powder extinguishing agent), so as to effectively respond to different types of fire situations. Symmetrically installed at the bottom of both sides of the frame 1 are pedestals 2, and the pedestals 2 are elastically connected to a support portion 4 through elastic members (the elastic members include but are not limited to springs and spring plates). The support portion 4 can move along and fit against the outside of the track and be compressed and retracted through the elastic members. On the side of the support portion 4 is a fitting portion 41 that can be embedded in the groove on the outside of the mine track; A moving assembly 5 is rotatably installed on the side of the frame 1 through a hinge shaft 8, and a driving wheel 51 is rotatably arranged at its end. The driving wheel 51 can rollingly cooperate with the corner 6 on the inner side of the top of the mine track; the driving wheel 51 is provided with a horizontal section and an inclined section. The horizontal section rollingly cooperates with the top of the mine track, and the inclined section rollingly cooperates with the inner side of the top of the mine track (see Figure 11 ); A telescopic driving member 7 is hinged between the frame 1 and the moving assembly 5 at both ends, and the moving assembly 5 is rotated around the hinge shaft 8 by telescopic driving, so that the moving assembly 5 approaches or moves away from the mine track; A triggering 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 mine track, the triggering portion 9 squeezes the support portion 4 by abutting against the mine track, so that the fitting portion 41 disengages from the mine track; at the same time, the moving assembly 5 rotates around the outside corner 6 of the mine track, thereby lifting the entire frame 1, which can increase the height of the fire extinguishing device, thereby improving the passability of the fire extinguishing device and being applicable to obstacles existing outside the mine track. For example, coal residues dropped by mine cars; the support portion 4 and the fitting portion 41 are lifted synchronously with the frame 1, which can reduce the obstruction caused by the bottom connection of the mine track; Specifically, several fire extinguishing devices are arranged along the mine track according to requirements. When a fire breaks out somewhere, the nearest fire extinguishing device is arranged to go to the fire area, realizing a rapid emergency response to multi-point fires, expanding the fire extinguishing coverage range, effectively improving the mine's ability to respond to multi-point fires, and providing a strong guarantee for the safe production of the mine.

[0019] Under normal conditions or when avoiding, the fire extinguishing device is embedded in the groove on the outer side of the track through the fitting part 41 at the end of the support part 4, and the support part 4 is installed on the outer side of the mining track to achieve stable support for the frame 1. Selectively installing a roller with power output in the fitting part 41 can make the fire extinguishing device move slowly for inspection under normal conditions, reduce the overall number of fire extinguishing devices, facilitate the passage of mine cars and rail transportation equipment, and reduce equipment costs and management difficulties; 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 mining track. The trigger part 9 first contacts the mining track. The trigger part 9 is restricted by the mining track and moves relative to the moving assembly 5. The trigger part 9 squeezes the supporting part 4 to make the engaging part 41 break away from the interference with the outer groove of the mining track; the engaging part 41 is still in the outer groove of the mining track. On the one hand, when the engaging part 41 moves along the mining track, it can avoid the protruding part of the connection between the mining tracks. On the other hand, when the frame 1 tilts, the engaging part 41 tilts synchronously and interferes with the outer groove of the mining track, playing a supporting role for the frame 1 and preventing the frame 1 from derailing. 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. 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 support part 4 and the fitting part 41 rise, thereby improving the passability of the frame 1 and avoiding interference of the fitting part 41 with the bottom connection of the mine track; 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; The mobile component 5 is driven to rotate around the hinge shaft 8 through the telescopic driving member 7, so that the mobile component 5 is close to the mining track, and the trigger part 9 contacts the mining track to squeeze the support part 4, so that the interlocking part 41 is separated from the mining track. At the same time, the mobile component 5 rotates around the outer corner 6 of the mining 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 deal with obstacles on the outside of the mining track, such as coal residues dropped from a mine car.

[0020] Based on the above analysis, under normal circumstances, the support part 4 is installed outside the mine track by embedding the end fitting part 41 of the support part 4 into the outer groove of the track, avoiding occupying the space of the main mine transportation track, and not interfering with the normal operation of mine cars and other equipment, thus ensuring the smooth progress of mine production; in case of a fire, the telescopic driving part 7 drives the moving component 5 to rotate, the triggering part 9 contacts the mine track, and presses the support part 4, causing the fitting part 41 to disengage from the mine track, and the driving wheel 51 then abuts against the inner corner 6 of the mine track, enabling the use of the existing mine track to quickly reach the fire site, 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, lifting the entire frame 1, enhancing the passability of the device, and being able to easily cross obstacles to ensure that the device can smoothly reach the fire site.

[0021] As a further solution of the present invention, the moving component 5 includes: A housing 52, rotatably arranged on the frame 1 through a hinge shaft 8, and the driving wheels 51 are linearly arranged inside the housing 52 (in this embodiment, the inside of the housing 52 refers to the adjacent side of the housing 52); a plurality of driving wheels 51 can improve the stability of the frame 1 and prevent the frame 1 from tilting and derailing; A driving motor 53, installed inside the housing 52, and its output shaft is in transmission connection with the driving wheels 51; the driving wheels 51 drive the housing 52 to move relative to the mine track, so that the frame 1 moves along the mine track; A locking component 54, installed between the driving wheels 51 and the housing 52, used to lock the remaining driving wheels 51 when the first driving wheel 51 disengages from the mine track, preventing the frame 1 from slipping off the end of the track; A protection component 55, installed between the driving motor 53 and the driving wheels 51, used to disconnect the power transmission when the driving wheels 51 are locked, preventing the output end of the driving motor 53 from being impacted; Specifically, referring to Figure 2 、 Figure 3 and Figure 5 , when the telescopic driving part 7 extends, the housing 52 rotates around the hinge shaft 8 towards the mine track, so that the triggering part 9 contacts the mine track and triggers the fitting 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 starts, driving the driving wheel 51 to rotate, so that the frame 1 moves along the mine track, switching the fire extinguishing device to use the inner side of the mine track, reducing the impact of the coal accumulation outside the mine track on the movement of the fire extinguishing device, and accelerating the speed of the fire extinguishing device reaching the fire site; When the frame 1 moves to the end of the mine track, the first driving wheel 51 disengages from the mine track first, and at the same time triggers the locking component 54 to lock the remaining driving wheels 51 to prevent the frame 1 from slipping off the end of the track. See Figure 2 and Figure 3 , there are several driving wheels 51. At this time, the frame 1 still has multiple points of support and will not fall forward due to inertia; After the driving wheels 51 are locked, the protection component 55 disconnects the power transmission between the driving motor 53 and the driving wheels 51 to prevent the output end of the driving motor 53 from being damaged by impact; As a further solution of the present invention, a driving shaft 11 is rotatably arranged in the housing 52, and the driving shaft 11 is axially slidably connected to the driving wheel 51 through a flat key 12; the driving wheel 51 can rotate with the driving shaft 11 and can axially slide relative to the driving shaft 11; A plurality of driving wheels 51 are commonly rotatably connected to a synchronizing frame 13, and a one-way limiter 14 is slidably arranged on the inner side (same as above) of the housing 52; the synchronizing frame 13 can synchronize the displacements of several driving wheels 51 along the axial direction of the driving shaft 11, so that the driving wheels 51 are evenly stressed, further improving the stability of the frame 1; A spring piece 15 is fixedly arranged at the bottom of the one-way limiter 14. When the spring piece 15 abuts against the mine track, it drives the one-way limiter 14 to approach the driving shaft 11, triggering the one-way limit of the driving wheel 51, and the one-way limiter 14 restricts the driving wheel 51 from moving away from the moving component 5; Supplement to explain that when the steel rail expands due to heat but is restricted by fasteners and ballast and cannot freely elongate, axial compressive stress is generated inside. The steel rail can be regarded as a slender compression bar, and buckling (unstable bending) occurs when the compressive stress exceeds the critical value. Due to construction errors or long-term loads in the actual track, there is generally an initial bending of micron level towards the outside. Under high temperature, the compressive stress will amplify this defect, resulting in an obvious outward displacement (away from the track center line direction), and the distance between the tracks increases.

[0022] Specifically, see Figure 1 , Figure 5 and Figure 6 , when a fire breaks out in the mine, the temperature in the mine will rise rapidly. Affected by the temperature, the stress of the mine track decreases, and the mine track undergoes slight deformation, which will cause the distance between the mine tracks to change. If the mine track deforms outward (away from the track center line direction), the traditional driving wheel 51 (track wheel) does not have the function of displacement. The outwardly bent track will cause the distance between the tracks to increase, resulting in the driving wheel 51 disengaging from the track, causing the fire extinguishing device to lose the power source and unable to reach the fire site in the first time; In the present invention, when the driving wheel 51 moves to the mine track that deforms outward, the driving wheel 51 can move to the outside of the mine track, that is, approach the moving component 5, so as to cope with the outward deformation of the mine track and avoid derailment of the driving wheel 51. 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.

[0023] As a further solution of the present invention, the one-way limiter 14 includes: The convex ring 141 is fixedly mounted in the driving wheel 51; The bracket 142 is slidably disposed in the housing 52 and is capable of radially moving relative to the driving wheel 51; The one-way limiting member 143 is fixed on the bracket 142 and is used to limit the convex ring 141 in one direction; A reset member 144 is disposed between the driving wheel 51 and the housing 52 and is used to reset the driving wheel 51; For details, see Figures 5-9 When the driving wheel 51 contacts the mining track, the driving wheel 51 is in a free state, and the driving wheel 51 can be away from the moving assembly 5 to ensure that it can roll with the inner corner 6 of the mining track, adapt to the slight deformation of the mining track, and at the same time stretch the reset member 144, so that the reset member 144 is in a power 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 along the axial direction of the driving shaft 11. 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, approach 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. 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. After the spring piece 15 contacts the mining track, the bracket 142 pushes the one-way limiter 143 to fit closely on the driving wheel 51 . When the convex ring 141 squeezes the one-way limiter 143 , the spring piece 15 deforms to provide a clearance space for the one-way limiter 143 .

[0024] As a further solution of the present invention, the first driving wheel 51 is slidably connected to the housing 52 through a slide groove; it should be noted that since the synchronous frame 13 and the first driving wheel 51 need to be able to move radially relative to the driving wheel 51, the implementation means include but are not limited to the gap fit between the synchronous frame 13 and the driving wheel 51, that is, the synchronous frame 13 is sleeved on the driving first driving wheel 51, and there is a gap between the synchronous frame 13 and the driving wheel 51, ensuring that after the first driving wheel 51 leaves the mining track, the locking assembly 54 can be triggered by displacement; The locking assembly 54 includes: The limit frame 17 is elastically and slidably arranged in the outer shell 52, and the limit frame 17 is fixedly provided with teeth 171; The limit teeth 18 are fixedly arranged on the drive shaft 11; See Figure 5 、 Figure 6 and Figure 7 , when the first driving wheel 51 disengages from the mining track, the limit frame 17 descends synchronously with the driving wheel 51, and its teeth 171 are embedded in the limit teeth 18 to achieve locking; the rest of the driving wheels 51 are locked to prevent the frame 1 from slipping off the end of the track.

[0025] As a further solution of the present invention, the protection component 55 includes: The sliding sleeve 19 is elastically and slidably arranged on the output shaft of the driving motor 53 and rotates synchronously; The tooth disengaging part 20 is fixedly arranged at the adjacent end of the end part of the sliding sleeve 19 and the limit teeth 18, and the tooth disengaging part 20 is provided with a chamfer; See Figure 5 、 Figure 6 and Figure 8 , when the driving wheel 51 is locked, the sliding sleeve 19 and the limit teeth 18 are disengaged from meshing with each other through the tooth disengaging part 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.

[0026] As a further solution of the present invention, the triggering part 9 includes: The spring plate 91 is arranged in the outer shell 52; The wedge-shaped block 92 is slidably arranged in the outer shell 52 and is elastically connected with the spring plate 91; The triggering top plate 93 is installed at the top of the fitting part 41; See Figure 3 、 Figure 4 、 Figure 10 and Figure 11 , when the outer shell 52 rotates and abuts against the mining track, the wedge-shaped block 92 is located between the mining track and the triggering top plate 93. The wedge-shaped block 92 moves relative to the moving assembly 5 under the extrusion of the mining track. The wedge-shaped block 92 drives the triggering top plate 93 to move synchronously, and the triggering top plate 93 drives the fitting part 41 to disengage from the mining track; when the fitting part 41 moves along the mining track, it can avoid the protruding part at the connection of the mining tracks.

[0027] As a further solution of the present invention, a strip-shaped groove 42 and a mounting groove 43 are respectively formed at the bottom and side wall of the fitting part 41; under normal conditions, the strip-shaped groove 42 can accommodate the protrusion at the bottom connection of the mining track, avoiding the influence of the protrusion at the bottom connection of the mining track on the movement of the frame. At the same time, the protrusion at the bottom connection of the mining track can limit the fitting part 41 through the strip-shaped groove 42, avoiding the fitting part 41 from disengaging from the mining track groove and improving the stability of the frame 1; The strip-shaped groove 42 is used to avoid the bottom connecting piece of the mine track; The installation grooves 43 are arranged in a linear array, used to stagger and avoid the protrusions at the joints of the mine track rails; the installation grooves 43 are used to install rollers with power output, which can make the fire extinguishing device move slowly for inspection under normal conditions, improve the applicable range of a single fire extinguishing device, and reduce the overall number of fire extinguishing devices; and the used installation grooves 43 can be selected according to the connection method between the mine tracks to avoid the protrusions at the joints of the mine tracks.

[0028] As a further solution of the present invention, the telescopic driving member 7 is a telescopic motor; the internal connection method of the telescopic motor adopts screw drive. On the one hand, compared with hydraulic drive, it is less affected by temperature. On the other hand, the power of extension and contraction is uniform.

Claims

1. A mobile fire extinguishing device for safe operation in coal mines, comprising a frame body (1), and a fire extinguishing unit (10) is integrated on the frame body (1), characterized in that: On both sides of the bottom of the frame body (1), pedestals (2) are symmetrically installed. The pedestals (2) are elastically connected to the supporting parts (4) through elastic members. The supporting parts (4) can move along and fit against the outer side of the track and be compressed and retracted through the elastic members. A fitting part (41) capable of being embedded in the groove on the outer side of the mine track is arranged on the side of the supporting part (4); The moving assembly (5) is rotatably installed on the side of the frame body (1) through a hinge shaft (8), and a driving wheel (51) is rotatably arranged at its end. The driving wheel (51) can rollingly cooperate with the corner (6) on the inner side of the top of the mine track; The telescopic driving member (7) is hinged between the frame body (1) and the moving assembly (5) at both ends for driving the moving assembly (5) to rotate around the hinge shaft (8); The triggering part (9) is elastically and slidably arranged at the bottom of the moving assembly (5); when the moving assembly (5) rotates to the outer side of the top of the mine track, the triggering part (9) presses the supporting part (4) by contacting the mine track, so that the fitting part (41) is separated from the mine track.

2. The mobile fire extinguishing device according to claim 1, characterized in that: The moving assembly (5) includes: A housing (52) is rotatably arranged on the frame body (1) through a hinge shaft (8), and the driving wheels (51) are linearly arranged inside the housing (52); A driving motor (53) is installed inside the housing (52), and its output shaft is in transmission connection with the driving wheel (51); A locking assembly (54) is installed between the driving wheel (51) and the housing (52) for locking the remaining driving wheels (51) when the first driving wheel (51) is separated from the mine track to prevent the frame body (1) from slipping off the end of the track; A protection assembly (55) is installed between the driving motor (53) and the driving wheel (51) for disconnecting the power transmission when the driving wheel (51) is locked to prevent the output end of the driving motor (53) from being impacted.

3. The mobile fire extinguishing device according to claim 2, wherein: A driving shaft (11) is rotatably arranged inside the housing (52), and the driving shaft (11) is axially slidably connected to the driving wheel (51) through a flat key (12); A plurality of the driving wheels (51) are jointly rotatably connected to a synchronous frame (13), and a one-way limiter (14) is slidably arranged inside the housing (52); A spring piece (15) is fixedly arranged at the bottom of the one-way limiter (14). When the spring piece (15) contacts the mine track, it drives the one-way limiter (14) to approach the driving shaft (11), triggering the one-way limit of the driving wheel (51).

4. The mobile fire extinguishing device according to claim 3, wherein: The one-way limiter (14) includes: A convex ring (141) is fixedly arranged inside the driving wheel (51); A bracket (142) is slidably arranged inside the housing (52) and can radially move relative to the driving wheel (51); A one-way limiting member (143) is fixedly arranged on the bracket (142) for performing one-way limiting on the convex ring (141); A reset member (144) is arranged between the driving wheel (51) and the housing (52) for resetting the driving wheel (51).

5. The mobile fire extinguishing device according to claim 2, wherein: The first driving wheel (51) is slidably connected to the housing (52) through a chute; The locking assembly (54) includes: The limit frame (17) is elastically and slidably arranged in the outer shell (52), and the limit frame (17) is fixedly provided with teeth (171); The limit teeth (18) are fixedly arranged on the drive shaft (11); When the first driving wheel (51) disengages from the mining track, the limit frame (17) descends synchronously with the driving wheel (51), and its teeth (171) are embedded into the limit teeth (18) to achieve locking.

6. The mobile fire extinguishing device according to claim 2, wherein: The protection component (55) includes: The sliding sleeve (19) is elastically and slidably arranged on the output shaft of the drive motor (53) and rotates synchronously; The tooth disengaging member (20) is respectively fixedly arranged at the end of the sliding sleeve (19) adjacent to the limit teeth (18), and the tooth disengaging member (20) is provided with a chamfer; When the driving wheel (51) is locked, the sliding sleeve (19) and the limit teeth (18) are disengaged from meshing with each other through the tooth disengaging member (20).

7. The mobile fire extinguishing device according to claim 1, wherein: The triggering part (9) includes: The spring plate (91) is arranged in the outer shell (52); The wedge-shaped block (92) is slidably arranged in the outer shell (52) and is elastically connected with the spring plate (91); The triggering top plate (93) is installed on the top of the fitting part (41); When the outer shell (52) rotates and abuts against the mining track, the wedge-shaped block (92) drives the fitting part (41) to disengage from the mining track through the triggering top plate (93).

8. The mobile fire extinguishing device according to claim 1, wherein: The bottom and side wall of the fitting part (41) are respectively provided with a strip-shaped 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 to stagger and avoid the protrusions at the joints of the rails of the mining track.

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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