CN217233577U - A injection mechanism for colliery is put out a fire - Google Patents

Abstract

The utility model provides an injection mechanism for colliery is put out a fire for can't put out a fire and the dangerous problem of manual work to the accurate fire extinguishing of ignition point after solving among the prior art colliery conflagration and taking place. Including swing subassembly and injection subassembly, circular track passes through fixing on the bottom plate of pillar, injection subassembly's rotation center line is the same with circular orbital axis, make and move along with the motion group when first driving piece can drive injection subassembly's injection end, circular orbital radian can be for exceeding 90 degrees and upwards move to vertical direction at most, make injection angle can be the level and descend downwards, injection subassembly can cover whole circular orbital scope this moment, when the conflagration breaing out, can be close to the ignition through colliery fortune coal dolly or manual handling with injection apparatus, in order to avoid smoke and dust and temperature to artificial influence, can spray the direction through artifical remote operation, the position of injection end is adjusted to the position of adjustment motion group on circular track, aim at the ignition and put out a fire.

Description

A injection mechanism for colliery is put out a fire

Technical Field

The utility model relates to a colliery fire extinguishing apparatus field especially relates to an injection mechanism for colliery is put out a fire.

Background

China is used as a world energy resource, large-scale coal mining activities are carried out for a long time, a large number of mined coal resources make contributions to the economic construction business of China, coal currently plays a role in the energy system of China for a long time, and the energy consumption main position of the coal is difficult to change for a long time. Accidents often occur in the coal mining process, particularly, the coal mine causes fire disasters due to spontaneous combustion or electrical short circuit and the like, the coal mine fire disasters are often in a small range, and the coal mine fire disasters cannot be timely and quickly extinguished, so that the coal mine fire disasters are quickly expanded, great property loss is caused, and even more serious accidents such as gas explosion, mine tunnel collapse and the like are caused.

In the prior art, when a coal mine fire happens, the modes of temporarily sealing a channel of a fire point, injecting nitrogen, grouting yellow mud, bathing by bubbles, spraying water, extinguishing fire and the like are generally adopted, but the injected fire extinguishing agent cannot accurately reach the position of the fire point, the fire extinguishing timeliness is poor, the fire extinguishing range is limited, the fire behavior of the fire point of the coal mine can be continuously expanded, coal mining equipment in the coal mine can be damaged, the potential safety hazard is large during secondary mining, the life safety of a fire prevention and extinguishing person is greatly threatened due to factors such as smoke dust, high temperature and the like during manual fire extinguishing, and the like, so that a mechanism is needed to accurately and quickly extinguish the fire to the fire point.

Disclosure of Invention

In view of the above prior art's shortcoming, the utility model aims to provide an injection mechanism for colliery is put out a fire for can't put out a fire and the dangerous problem of manual fire extinguishing to the ignition point accuracy after the colliery conflagration takes place among the solution prior art.

To achieve the above and other related objects, the present invention provides a spray mechanism for fire extinguishing in coal mines, comprising a swing assembly and a spray assembly,

a swing assembly including a base plate, a plurality of pillars fixed on the base plate, a circular track, and a motion group, the plurality of pillars for supporting the circular track, the radian of the circular track is not lower than 90 degrees, teeth are arranged on the outer side of the circular track, the axial width of the teeth on the outer side of the circular track is not more than one half of the axial width of the circular track, the motion group comprises a support plate, a first driving piece, a gear and two guide wheels, the first driving piece is fixedly arranged on the support plate, the gear is fixedly sleeved at the output end of the first driving piece, the gear is meshed with the rack on the circular track, the two guide wheels are respectively positioned at the two sides of the circular track, one end of the guide wheel is fixed on the supporting plate, and the guide wheel can slide in a circumferential non-toothed area of the circular track.

The spraying assembly is installed on the bottom plate and used for spraying fire extinguishing agents, the spraying assembly is rotatably connected with the swinging assembly, and the rotating center of the spraying assembly coincides with the axis of the circular track.

Preferably, the injection subassembly includes fire extinguishing agent container, fire extinguishing agent pump, first output tube, rotary joint and second output tube, the fire extinguishing agent container is located on the bottom plate, the fire extinguishing agent pump is located the bottom of fire extinguishing agent container, first output tube cover is in admittedly the output of fire extinguishing agent pump, the fire extinguishing agent pump be used for with fire extinguishing agent pump in the fire extinguishing agent container is gone into first output tube, first output tube with circular orbital coaxial arrangement, first output tube with the second output tube passes through rotary joint rotates to be connected, the second output tube is close to the rotary joint link is equipped with the return bend, the other end of second output tube is fixed in the backup pad.

Preferably, the cross-sectional shape of the fire extinguishing agent container perpendicular to the plane of the circular track is concave.

Preferably, the arc of the circular track is not less than 180 degrees.

Preferably, the swing assembly further comprises a limiting block for limiting the position of the motion group.

Preferably, the circular track is provided with a concave guide groove, and the guide wheel can slide in the guide groove of the circular track.

Preferably, the number of the guide wheels is not less than two, and the two guide wheels are in sliding connection with the circular track.

Preferably, the motion group includes two the gear, circular orbit both sides all are equipped with the rack, two the gear symmetrical arrangement in circular orbit both sides and all with rack toothing, first driving piece can drive arbitrary one the gear revolve.

Preferably, a detection device is further arranged on the supporting plate, the detection device is located on the supporting plate, and the detection direction is the same as the length direction of the second output pipe.

Preferably, still include the casing, the casing is used for protecting swing subassembly with the injection subassembly, the casing is in be equipped with the breach on the motion trail of second output tube.

As mentioned above, the utility model discloses a spraying mechanism for colliery is put out a fire has following beneficial effect at least:

the circular track is fixedly supported on the bottom plate through a plurality of supporting columns, the rotation center line of the spraying assembly is the same as the axis of the circular track, and the rotation point of the spraying assembly is equal to the position of the moving group at the moment, so that when the first driving piece drives the moving group to move on the circular track, the spraying end of the spraying assembly moves along with the moving group and can spray the fire extinguishing agent. The arc of the circular track may be over 90 degrees and move up to the vertical direction at most so that the spraying end may move to the horizontal direction downward, at which time the fire extinguishing agent sprayed by the spraying assembly may extinguish a fire on the ground. The fire extinguishing agent that sprays the subassembly and spray can cover whole circular orbit's scope, when the conflagration breaing out, can be according to the scene of a fire, be close to the ignition through colliery coal-transporting dolly or artifical transport with injection apparatus, in order to avoid smoke and dust and temperature to artificial influence, can artifical remote operation spray direction, adjust the position of injection end through the position of adjustment motion group on circular orbit, it can to put out a fire to aim at the ignition, thereby effectively solved colliery conflagration and can't put out a fire to the ignition accuracy and the dangerous problem of manual fire extinguishing after taking place.

Drawings

Fig. 1 shows a schematic front view of a spraying mechanism for fire extinguishing in a coal mine.

Fig. 2 shows another schematic front view of the spraying mechanism for coal mine fire extinguishing according to the present invention.

Fig. 3 shows a schematic top view of the spraying mechanism for coal mine fire extinguishing according to the present invention.

Fig. 4 is a schematic front view of an embodiment of the sports team of the present invention.

Fig. 5 is a schematic front view of another embodiment of the sports team of the present invention.

Fig. 6 is a schematic top view of an embodiment of the kinematic group of the present invention.

Fig. 7 is a schematic cross-sectional view of an embodiment of the exercise assembly of the present invention.

Description of the element reference

1. A swing assembly; 11. a base plate; 12. a circular track; 13. a pillar; 14. a motion group; 141. a support plate; 142. a first driving member; 143. a gear; 144. a guide wheel; 15. a limiting block;

2. a spray assembly; 21. a fire suppressant container; 22. a fire suppressant pump; 23. a first output pipe; 24. a rotary joint; 25. a second output pipe; 251. connecting a bracket;

3. a detection device;

4. a housing.

Detailed Description

The following description is provided for illustrative purposes, and other advantages and features of the present invention will become apparent to those skilled in the art from the following detailed description.

Please refer to fig. 1 to 7. It should be understood that the structure, ratio, size and the like shown in the drawings attached to the present specification are only used for matching with the content disclosed in the specification, so as to be known and read by those skilled in the art, and are not used for limiting the limit conditions that the present invention can be implemented, so that the present invention has no technical essential meaning, and any structure modification, ratio relationship change or size adjustment should still fall within the scope that the technical content disclosed in the present invention can cover without affecting the function that the present invention can produce and the purpose that the present invention can achieve. Meanwhile, the terms such as "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for convenience of description, and are not intended to limit the scope of the present invention, and changes or adjustments of the relative relationship thereof may be made without substantial technical changes, and the present invention is also regarded as the scope of the present invention.

The following examples are for illustrative purposes only. The various embodiments may be combined, and are not limited to what is presented in the following single embodiment.

Referring to fig. 1 to 7, the present invention provides a spraying mechanism for fire extinguishing in coal mine, which comprises a swing assembly 1 and a spraying assembly 2,

the swing assembly 1 comprises a base plate 11, a plurality of pillars 13, a circular track 12 and a motion set 14, wherein the base plate 11 can be made of light materials such as aluminum alloy plates or hard plastic plates capable of bearing a certain weight, the weight of the whole equipment is reduced, the base plate 11 can be square, four support legs can be arranged on the periphery of the base plate 11, the placement and the carrying mechanism are convenient, the pillars 13 are fixed on the base plate 11, the pillars 13 are used for supporting the circular track 12, at least two pillars 13 are respectively divided into the front end and the rear end of the base plate 11, the pillars 13, the base plate 11 and the circular track 12 can be fixed in a welding, bonding or screwing mode, the radian of the circular track 12 is not lower than 90 degrees, namely the circular track 12 exceeds a quarter of a circular arc, so that the motion set 14 can move upwards to the vertical direction at most and can move downwards to the horizontal direction, at this time, the fire extinguishing agent spraying port fixed on the moving group 14 can extinguish fire on the ground, so that the fire extinguishing range is expanded, the outer side of the circular rail 12 is provided with teeth, the ratio of the teeth on the outer side of the circular rail 12 to the axial width of the circular rail 12 is not more than one half, so that an area where the gear 143 and the guide wheel 144 slide is arranged in the axial direction of the circular rail 12, the moving group 14 comprises a support plate 141, a first driving member 142, a gear 143 and two guide wheels 144, wherein the guide wheel 144 and the gear 143 are both located on one side of the support plate 141, and one end of each guide wheel 144 and one end of each gear 143 are fixed on the support plate 141, so that the relative positions of the guide wheels 144 and the gear 143 are not changed, the first driving member 142 and the gear 143 are respectively located on both sides of the support plate 141, the first driving member 142 is fixed on the support plate 141, and the gear 143 is fixedly sleeved on the output end of the first driving member 142, the gear 143 is engaged with the rack on the circular track 12, the output end of the first driving member 142 passes through the supporting plate 141 and is rotatably connected with the gear 143 without contacting with the supporting plate 141, or the output shaft of the first driving member 142 passes through the supporting plate 141, a bearing is arranged on the supporting plate 141 at the passing position, the outer ring of the bearing is fixed on the supporting plate 141, and the inner ring of the bearing is fixedly connected with the output end of the first driving member 142, so that when the first driving member 142 drives the gear 143 to rotate, the bearing rotates while the supporting plate 141 keeps the relative position and plays a supporting role for the gear 143, the first driving member 142 has a locking function, and when the moving group 14 moves to a proper position along the circular track 12, the fixing of the moving group 14 is realized through the locking of the first driving member 142. The gear 143 is engaged with a rack on the circular track 12, and the second driving assembly can drive the gear 143 to rotate on the rack on the circular track. The two guide wheels 144 are respectively located at two sides of the circular track, one end of each guide wheel 144 is fixed on the support plate 141, the guide wheels 144 can slide in the circumferential non-toothed region of the circular track 12, the support plate 141 plays a role in guiding the guide wheels 144 to prevent the support plate 141 from rotating, the movement of the support plate 141 is along the circumferential direction of the circular track 12, particularly when the moving group 14 is located at the lowest position of the circular track 12, the first driving group is locked, at this time, the two guide wheels 144 are both in close contact with the circular track 12 and the rack is meshed with the gear 143, the gear 143 is meshed with the rack without relative movement, the sliding of the moving group 14 can be avoided, the number of the guide wheels 144 can also be two, the guiding function is better, the material of the guide wheels 144 can be smooth plastic, so that the guide wheels 144 have small friction and are not easy to deform when sliding on the circular track 12, the first driving member 142 outputs a small force to push the moving group 14 to slide along the circular track 12.

A jetting assembly 2, said jetting assembly 2 being mounted on said base plate 11. The fire extinguishing agent container 21 of the spraying component 2 can be fixed on the upper side of the bottom plate 11 in a bonding mode and other modes, the spraying component 2 is used for spraying a fire extinguishing agent which can be dry powder, foam, liquid nitrogen, liquid carbon dioxide and the like, when the container is filled with the fire extinguishing agent such as the liquid nitrogen or the liquid carbon dioxide, the container needs to be protected, high temperature is isolated, leakage is avoided, potential safety hazards are avoided, meanwhile, the fire extinguishing agent is sprayed through a mechanism, the harm of the fire extinguishing agent to a human body in manual operation is also avoided, the spraying component 2 is rotationally connected with the swinging component 1, the rotation center of the spraying component 2 coincides with the axis of the circular track 12, the spraying end is fixed on the moving group 14, the distance between the moving group 14 on the circular track 12 and the rotation center of the spraying component 2 is equal everywhere, and the swinging center of the spraying component 2 can synchronously rotate along with the moving group 14, at this moment, the moving group 14 is locked at any position of the circular track 12, the fire extinguishing agent spraying end fixed on the moving group 14 can spray the fire extinguishing agent, the spraying direction is the radial direction of the circular track 12, the amplitude of the circular track 12 exceeds 90 degrees and the circular track can move to the vertical direction at the highest, the fire extinguishing agent spraying range covers the positions of the lower front part, the front part and the upper part, and the fire extinguishing of the fire extinguishing points at the places can be realized by the spraying assembly 2.

Referring to fig. 1 to 3, in the present embodiment, the spraying assembly 2 includes a fire extinguishing agent container 21, a fire extinguishing agent pump 22, a first output pipe 23, a rotary joint 24 and a second output pipe 25, the fire extinguishing agent container 21 is located on the bottom plate 11, the fire extinguishing agent container 21 is used for containing a fire extinguishing agent, the shape of the fire extinguishing agent container 21 may be similar to a horseshoe shape, that is, the middle of the fire extinguishing agent container is low, the two sides of the fire extinguishing agent container are high, the middle of the fire extinguishing agent container is low, the second output pipe 25 is convenient to move, the fire extinguishing agent container 21 may be dry powder, foam, liquid nitrogen, liquid carbon dioxide or the like, and when the fire extinguishing agent container is filled with liquid nitrogen or liquid carbon dioxide or the like, the fire extinguishing agent container 21 needs to be capable of protecting the container, isolating high temperature, avoiding leakage and causing potential safety hazards. The fire extinguishing agent pump 22 is located at the bottom of the fire extinguishing agent container 21, the fire extinguishing agent pump 22 may be an air pump or a liquid pump, etc., and corresponds to the type of fire extinguishing agent, the first output pipe 23 is fixedly sleeved at the output end of the fire extinguishing agent pump 22, the fire extinguishing agent pump 22 is used for pumping the fire extinguishing agent pump 22 in the fire extinguishing agent container 21 into the first output pipe 23, the first output pipe 23 is coaxially arranged with the circular track 12, so that the distance between the moving group 14 on the circular track 12 and the first output pipe 23 is equal everywhere, the first output pipe 23 and the second output pipe 25 are rotatably connected through the rotary joint 24, the rotary joint 24 is a common technology, which is not mentioned here, the second output pipe 25 is provided with a bent pipe near the rotary joint connection end, and since the direction of the first output pipe 23 and the spraying direction of the fire extinguishing agent are 90 degrees, a 90-degree bent pipe may be provided here, the pumped fire extinguishing agent can be sprayed out along the radial direction of the circular track 12, the other end of the second output pipe 25 is fixed on the supporting plate 141, a connecting support 251 can be further arranged at the position, close to the supporting plate 141, of the second output pipe 25, one end of the connecting support 251 is fixedly arranged on the second output pipe 25, the other end of the connecting support 251 is rotatably connected with the supporting plate 141 through a bearing, the outer ring of the bearing is fixed on the supporting plate 141, the inner ring of the bearing is fixedly sleeved on the connecting support 251, therefore, the motion group 14 drives the second output pipe 25 to rotate along the center of the circular track 12, the output port of the second output pipe 25 is horn-shaped, the output port of the horn-shaped output pipe enables the sprayed fire extinguishing agent to cover a large range, and faster fire extinguishing is facilitated. The amplitude of the circular track 12 exceeds 90 degrees, so that the fire extinguishing agent spraying range covers positions which are lower, front and upper in front, and the fire extinguishing of the fire ignition points of the positions can be realized by the spraying assembly 2.

Referring to fig. 1 to 3, in the present embodiment, the cross-sectional shape of the fire extinguishing agent container 21 perpendicular to the plane of the circular track 12 is a concave shape, the second output pipe 25 can swing at the lower part of the concave shape, and the concave shape is capable of carrying more fire extinguishing agent, and the output end of the fire extinguishing agent pump 22 and the first output pipe 23 are located at the lower part of the concave fire extinguishing agent container 21.

Referring to fig. 1 to 2, the arc of the circular track 12 is not less than 180 degrees, i.e. more than a semicircle, at this time, the moving group 14 can exceed a semicircle in the moving range of the circular track 12, the moving group 14 can slide on the circular track 12 and lock at any position of the circular track 12, and the mechanism can spray extinguishing agent over a wider range.

Referring to fig. 1 to 2, in this embodiment, the swing assembly 1 further includes a limiting block 15, the limiting block 15 is used to limit the position of the motion set 14, the material of the limiting block 15 may be a soft material such as rubber, so as to avoid damaging the device when colliding with the motion set 14, the limiting block 15 is fixedly disposed at two ends of the circular track 12 by bonding, and the limiting block 15 slides out of the circular track 12 in order to prevent the motion set 14 from being too fast.

Referring to fig. 1 to 7, in the embodiment, the circular track 12 is provided with a concave guide groove, the concave guide grooves are provided on both sides of the circular track 12, the guide wheel 144 can slide in the guide groove of the circular track 12, and the guide wheel 144 cannot slide out of the guide groove when sliding, so that the moving group 14 does not swing in the axial direction of the circular track 12, and the movement is more stable.

Referring to fig. 1 to 6, in the embodiment, the number of the guide wheels 144 is not less than two, the two guide wheels 144 are both slidably connected to the circular track 12, the two guide wheels 144 contact with the circular guide rail, so that the guiding effect is better, and meanwhile, after the guide wheels 144 are used for a long time, a gap occurs between the guide wheels 144 and the support of the circular track 12, so that the support slightly swings, which may cause a situation that the gear 143 is not tightly engaged with the rack, and the two guide wheels 144 can prevent the situation.

Referring to fig. 1 to 5, in the present embodiment, the motion set 14 includes two gears 143, racks are arranged on both sides of the circular track 12, the two gears 143 are symmetrically arranged on both sides of the circular track 12 and are engaged with the racks, the first driving member 142 can drive one of the gears 143 to rotate, one end of the shaft of the gear 143 of the other non-driven gear 143 is fixed on the supporting plate 141, the size of the shaft of the gear 143 is rotatably connected with the shaft of the gear 143 through a bearing, so that the gear 143 without driving force can still be engaged with the rack and rotated, so that when the moving group 14 is located at the lowest end of the circular orbit 12, the two gears 143 are engaged with the racks on the two sides of the circular track 12, and the upper guide wheel 144 is contacted with the circular track 12, so that the gears 143 are always engaged with the racks, and the moving group 14 cannot slide.

Referring to fig. 1 to 7, in this embodiment, the supporting plate 141 is further provided with a detecting device 3, the detecting device 3 is located on the supporting plate 141, and the detecting direction is the same as the spraying direction of the second output tube 25, the detecting device may include a camera, an illuminating device, a temperature sensor, a distance sensor, and the like, so that when an operator performs remote operation, the accurate ignition point is determined by the detecting device 3, the illuminating and the camera device enable the operator in a dark coal mine to clearly see the road surface and the state of the ignition point, and meanwhile, the detecting device 3 needs to be protected so that it has certain high temperature resistance or water resistance and is not damaged when extinguishing a fire.

Referring to fig. 1 to 3, in this embodiment, the fire extinguishing apparatus further includes a casing 4, the casing 4 is used for protecting the swing assembly 1 and the spraying assembly 2, the casing 4 is provided with a gap on a motion track of the second output pipe 25, the casing 4 can effectively protect coal falling from above during the advancing process of the apparatus, prevent coal ash from entering the casing 4, reduce various dust and impurities deposited on a rack and influence normal operation of the apparatus, the gap on the casing 4 is used for spraying a fire extinguishing agent through the second output pipe 25, and if the apparatus is provided with other detection apparatuses, the gap can be exposed to the outside to achieve functions of the apparatus.

To sum up, the utility model discloses circular track 12 is through the fixed stay of a plurality of pillars 13 on bottom plate 11, and the axis of rotation of injection subassembly 2 is the same with circular track 12, and the rotation point of injection subassembly 2 equals everywhere to the position department of motion group 14 this moment for when first driving piece 142 drive motion group 14 moves on circular track 12, the injection end of injection subassembly 2 just can spout the fire extinguishing agent along with motion group 14 moves together. The arc of the circular track 12 may be over 90 degrees and move up to the vertical direction at most so that the spraying end can move to the horizontal downward direction, at which time the fire extinguishing agent sprayed by the spraying assembly 2 can extinguish the fire on the ground. The fire extinguishing agent that sprays subassembly 2 sprays can cover the scope of whole circular track 12, when the conflagration breaing out, can be according to the scene of a fire, it is close to the ignition point with injection apparatus through colliery coal-carrying dolly or artifical transport, in order to avoid smoke and dust and temperature to artificial influence, can artifical remote operation spray direction, adjust the position of injection end through the position of adjustment motion group 14 on circular track 12, it can to put out a fire to aim at the ignition point, thereby the unable problem of putting out a fire to the ignition point accuracy and the manual fire extinguishing danger after effectively having solved colliery conflagration emergence. Therefore, the utility model effectively overcomes various defects in the prior art and has high industrial utilization value.

The above embodiments are merely illustrative of the principles and effects of the present invention, and are not to be construed as limiting the invention. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which may be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.

Claims (10)

1. A spray mechanism for coal mine fire extinguishing, comprising:

the swinging assembly comprises a bottom plate, a plurality of pillars, a circular track and a movement group, the pillars are fixed on the bottom plate, the pillars are used for supporting the circular track, the radian of the circular track is not lower than 90 degrees, teeth are arranged on the outer side of the circular track, the ratio of the teeth on the outer side of the circular track to the axial width of the circular track is not more than one half, the movement group comprises a support plate, a first driving part, a gear and two guide wheels, the first driving part is fixedly arranged on the support plate, the gear is fixedly sleeved on the output end of the first driving part, the gear is meshed with a rack on the circular track, the two guide wheels are respectively positioned on two sides of the circular track, one end of each guide wheel is fixed on the support plate, and the guide wheels can slide in the area without teeth in the circumferential direction of the circular track,

the spraying assembly is installed on the bottom plate and used for spraying fire extinguishing agent, the spraying end of the spraying assembly is fixed to the supporting plate, the spraying assembly is rotatably connected with the swinging assembly, and the rotating center of the spraying assembly coincides with the axis of the circular track.

2. A spray mechanism for coal mine fire suppression according to claim 1, wherein: the injection subassembly includes fire extinguishing agent container, fire extinguishing agent pump, first output tube, rotary joint and second output tube, the fire extinguishing agent container is located on the bottom plate, the fire extinguishing agent pump is located the bottom of fire extinguishing agent container, first output tube overlaps admittedly the output of fire extinguishing agent pump, the fire extinguishing agent pump be used for with fire extinguishing agent pump income in the fire extinguishing agent container first output tube, first output tube with circular orbital coaxial arrangement, first output tube with the second output tube passes through rotary joint rotates to be connected, the second output tube is close to the rotary joint link is equipped with the return bend, the other end of second output tube is fixed in the backup pad.

3. A spray mechanism for coal mine fire suppression according to claim 2, wherein: the cross section of the fire extinguishing agent container perpendicular to the plane of the circular track is concave.

4. A spray mechanism for coal mine fire suppression according to claim 1, wherein: the radian of the circular track is not lower than 180 degrees.

5. A spray mechanism for coal mine fire suppression according to claim 1, wherein: the swing assembly further comprises a limiting block, and the limiting block is used for limiting the position of the motion group.

6. A spray mechanism for coal mine fire suppression according to claim 1, wherein: the circular track is provided with a concave guide groove, and the guide wheel can slide in the guide groove of the circular track.

7. A spray mechanism for coal mine fire suppression according to claim 1, wherein: the number of the guide wheels is not less than two, and the two guide wheels are connected with the circular track in a sliding mode.

8. A spray mechanism for coal mine fire suppression according to claim 1, wherein: the motion group includes two the gear, circular track both sides all are equipped with the rack, two gear symmetric arrangement is in circular track's both sides and all with rack toothing, first driving piece can drive arbitrary one the gear revolve.

9. A spray mechanism for coal mine fire suppression according to claim 2, wherein: the supporting plate is further provided with a detecting device, the detecting device is located on the supporting plate, and the detecting direction is the same as the length direction of the second output pipe.

10. A spray mechanism for coal mine fire suppression according to claim 2, wherein: the shell is used for protecting the swinging assembly and the spraying assembly, and a notch is formed in the motion track of the second output pipe.

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