CN114849407A - Automatic dust falling device and method thereof - Google Patents

Abstract

The invention discloses an automatic dust-settling device, which sucks underground air into a spray cylinder for preliminary spray dust settling and secondarily filters residual coal dust in the underground air through a first filter screen and a second filter screen in a filter cylinder for dust settling. Can carry out the secondary dust fall with the coal dust in the air among the air suction the device in the pit, avoid spraying water smoke in a large number to the coal mine tunnel and carry out the dust fall for moist muddy in the tunnel. After can tentatively spraying the dust fall to the air in the pit, the rethread first filter screen cooperation second filter screen carries out the secondary to the remaining coal dust of air in the pit and filters the dust fall, and the dust fall effect is better. Through the first clean pole of dwang cooperation, the clean pole of second, can clear away the coal dust impurity of adhesion on first filter screen and the second filter screen. Through the cooperation of the dust collection chamber and the dust collection box, the coal dust impurities falling after being removed can be collected and cleaned.

Description

Automatic dust falling device and method thereof

Technical Field

The invention discloses an automatic dust falling device and method, relates to an automatic dust falling device and method in a coal mine tunnel, and belongs to the technical field of coal mine dust falling.

Background

The colliery is in process of production, because the colliery is located the ground end, carry out the exploitation operation under the environment of relative confined, can produce a large amount of coal dusts, the workman is long-term to be operated under the environment of densely covered coal dusts, can lead to the visibility to reduce on the one hand, influence the operation safety, on the other hand workman inhales the coal dusts easily, influence healthily, consequently, need carry out the dust fall to the air in the colliery, current colliery dust device adopts the form of spraying dust fall to carry out the dust fall more, nevertheless spray the water smoke in a large number in the colliery tunnel and carry out the dust fall, can make moist muddy mud in the tunnel on the one hand, influence normal production work, on the other hand is great owing to spraying the scope, the density that sprays the water smoke is comparatively sparse, still can residual part's coal dusts in the air in the pit after the spraying dust fall, the dust fall effect is thorough inadequately.

Publication No. CN216381486U discloses an automatic spraying dust-settling device for coal mines, which comprises a main water inlet pipe; the main water inlet pipe is communicated with a water inlet electric ball valve, and the main water inlet pipe is communicated with a water inlet pressure gauge; the main water inlet pipe is fixedly connected with the spray fixing frame, side fixing frames are rotatably arranged on two sides of the spray fixing frame, and screw hole sites are arranged on the spray fixing frame in an array around the center of a connecting rotating shaft of the spray fixing frame and the side fixing frames; the spraying assembly is arranged in the spraying fixing frame in an array mode, and three inner spraying rings are fixedly arranged in the spraying assembly in an array mode; the device can spray the dust fall in the colliery tunnel, nevertheless sprays the water smoke in a large number in the colliery tunnel and carries out the dust fall, and on the one hand can make moist muddy in the tunnel, influences normal production work, and on the other hand is because the range of spraying is great, and the density of spraying the water smoke is comparatively sparse, still can remain the coal dust of part in the air in the pit after the dust fall of spraying.

The publication number CN205117391U discloses a coal mine underground movable spray dust-settling device, which consists of a pump, a spray frame and a water tank moving along with the spray frame, wherein the water tank is detachably mounted on a trolley and can conveniently move along an underground track according to the requirement of a working surface, and a plurality of backup water tanks for replacement are matched, so that the problem that the working range of the prior art is limited by underground water pipes is solved, and dust-settling operation can be carried out on the working surface without laying the underground water pipes; however, the device sprays water smoke in a large number in to coal mine tunnel and carries out the dust fall, and on the one hand can make moist mire in the tunnel, influences normal production work, and on the other hand is because the range of spraying is great, and the density that sprays the water smoke is comparatively sparse, still can residual part's coal dust in the air in the pit after the spraying dust fall.

The publication number CN111075497A discloses a height-adjustable spray dust-settling device in a coal mine, which comprises a spray head, wherein the spray head is fixedly arranged on an installation hole, the bottom of the installation hole is fixedly provided with a lifting block, the lifting block is arranged in a guide block in a vertically sliding manner, the inside of the lifting block is provided with a cavity, a threaded rod is rotatably arranged in the cavity and matched with a threaded hole in the lifting block, the bottom of the threaded rod is rotatably arranged on a support block, the bottom of the threaded rod is fixedly sleeved with an A gear, the A gear is meshed with a B gear arranged on a motor, and the motor is fixedly arranged on a chassis; the supporting block and the guide block are fixedly arranged on the chassis; the device can spray the dust fall in the colliery tunnel, nevertheless sprays the water smoke in a large number in the colliery tunnel and carries out the dust fall, and on the one hand can make moist muddy in the tunnel, influences normal production work, and on the other hand is because the range of spraying is great, and the density of spraying the water smoke is comparatively sparse, still can remain the coal dust of part in the air in the pit after the dust fall of spraying.

Disclosure of Invention

In order to improve the situation, the invention provides an automatic dust-settling device which sucks underground air into a spray cylinder for primary spray dust settling and secondarily filters and settles residual coal dust in the underground air through a first filter screen and a second filter screen in a filter cylinder.

The invention discloses an automatic dust falling device, which is realized by the following steps: the invention relates to an automatic dust-settling device, which comprises a spraying component for primarily spraying underground air to settle dust, a connecting pipe and a filtering component for secondarily filtering residual coal dust in the underground air to settle dust,

it is characterized in that one end of the connecting pipe is communicated with the spraying component, the other end is communicated with the filtering component,

the spray component consists of a spray cylinder, an air suction pipe, a spiral spray pipe, a blow-down cylinder, a blow-down pipe, a suction fan, a spray header and a drainage plate,

the spray cylinder is communicated with the air suction pipe, the suction fan is arranged in the air suction pipe,

preferably, the spray cylinder is of a cylindrical structure, the air suction pipe is close to one end of the spray cylinder,

the spray cylinder is communicated with one end of the connecting pipe,

preferably, the connecting pipe is close to the other end of the spray cylinder,

a sewage draining cylinder is arranged at the other end of the spraying cylinder,

preferably, the blowdown cylinder is of a cylindrical structure, the diameter of the blowdown cylinder is gradually reduced from one end to the other end,

one end of the sewage discharge cylinder is communicated with the spray cylinder, the other end is communicated with the sewage discharge pipe,

the spiral spray pipe disc is arranged on the outer wall of the spray cylinder, a plurality of spray heads are arranged on the spiral spray pipe, one end of each spray head is communicated with the spiral spray pipe, the other end of each spray head penetrates through the cylinder wall of the spray cylinder and extends into the spray cylinder,

preferably, the spray header extends downwards obliquely towards the direction of the central line of the spray cylinder,

two groups of drainage plates are arranged on the inner wall of the spray cylinder at equal intervals along the circumferential direction, each group of drainage plates consists of a plurality of drainage plates,

preferably, two groups of the drainage plates are arranged in a staggered way, the plurality of drainage plates in the same group are arranged at equal intervals along the central line direction of the spray cylinder,

preferably, one end of the drainage plate and the inner wall of the spray cylinder form an acute included angle and extend downwards in an inclined mode, the other end of the drainage plate is bent downwards in a vertical mode,

the filtering component consists of a filter cartridge, a rotating motor, a dust collecting cavity, a dust collecting box, a first filter screen, a first cleaning rod, a second cleaning rod, a brush, a second filter screen, a rotating rod and an air outlet pipe,

one end of the filter cartridge is communicated with the other end of the connecting pipe,

preferably, the filter cartridge is of a cylindrical structure,

a first filter screen is arranged in the filter cylinder through a filter screen frame, a second filter screen is arranged in the filter cylinder through the filter screen frame,

preferably, the filter screen frame is in a cross structure,

preferably, the filter screen is of a circular structure,

the middle part of the other end of the filter cartridge is provided with a rotating motor, the other end of the filter cartridge is communicated with an air outlet pipe,

preferably, the air outlet pipe is positioned below the rotating motor,

a rotating rod is arranged on the rotating motor,

preferably, the rotating rod is positioned in the filter cylinder,

one end of the rotating rod passes through the other end of the filter cartridge and is connected with the rotating motor, the other end of the rotating rod is connected with the cross-shaped intersection of the filter screen frame through a bearing,

preferably, a sealing bearing is arranged between the rotating rod and the filter cylinder,

preferably, the other end of the rotating rod is positioned between the first filter screen and the second filter screen,

a first cleaning rod is arranged on the rotating rod, a second cleaning rod is arranged on the rotating rod,

preferably, the first cleaning rod is positioned between the first filter screen and the second filter screen and close to the first filter screen, the second cleaning rod is positioned between the first filter screen and the second filter screen and close to the second filter screen,

a row of hairbrushes are arranged on the first cleaning rod, one end of the hairbrush is connected with the first cleaning rod, the other end of the hairbrush is contacted with the first filter screen,

a row of hairbrushes are arranged on the second cleaning rod, one end of each hairbrush is connected with the second cleaning rod, the other end of each hairbrush is contacted with the second filter screen,

a dust collecting cavity is arranged on the filter cylinder and communicated with the filter cylinder,

preferably, the dust collecting chamber is of a rectangular structure, the length of the dust collecting chamber is the same as the diameter of the filter cylinder,

the dust collecting cavity is positioned under the first filter screen and the second filter screen,

the dust collecting box is detachably arranged in the dust collecting cavity through a handle,

preferably, the dust box is positioned at the bottom of the dust collecting cavity,

furthermore, a third cleaning rod is arranged on the rotating rod, the third cleaning rod and the first cleaning rod are symmetrically distributed about the rotating rod, a fourth cleaning rod is arranged on the rotating rod, the fourth cleaning rod and the second cleaning rod are symmetrically distributed about the rotating rod, the third cleaning rod is positioned between the first filter screen and the second filter screen and is close to the first filter screen, the fourth cleaning rod is positioned between the first filter screen and the second filter screen and is close to the second filter screen, a row of hairbrushes are arranged on the third cleaning rod, one end of each hairbrush is connected with the third cleaning rod, the other end of each hairbrush is contacted with the first filter screen, a row of hairbrushes are arranged on the fourth cleaning rod, one end of each hairbrush is connected with the fourth cleaning rod, and the other end of each hairbrush is contacted with the second filter screen;

the invention also relates to an automatic dust settling method, which is characterized by comprising the following steps:

1) the automatic dust settling device is fixedly arranged on the side wall of a roadway under a coal mine, so that a drain pipe is positioned above a drainage groove at the edge of the coal mine roadway;

2) communicating a spiral spray pipe with a water pump, communicating an air outlet pipe with a suction machine, simultaneously starting the water pump, the suction machine and a suction fan in an air suction pipe, and sucking turbid air in a coal mine into a spray cylinder;

3) after being sucked into the spray cylinder, the turbid air slowly flows along the drainage plates, the spray head is opened, water mist is sprayed out of the spray head to carry out primary dust fall treatment on granular coal dust in the turbid air, and the generated sewage flows into the drainage groove through the drainage pipe after being finally collected by the drainage cylinders under the drainage action of the drainage plates;

4) air subjected to primary dust-settling treatment in the spraying cylinder flows into the filter cylinder through the connecting pipe, secondary dust settling is performed on granular coal dust remaining in the air under the filtering action of the first filter screen and the second filter screen, and the air subjected to double dust settling is sucked into the air outlet pipe and is exhausted under the suction action of the suction machine;

5) when the first filter screen and the first filter screen push excessive coal dust impurities to affect the filtering effect, the rotating motor is started, the first cleaning rod and the second cleaning rod are driven to rotate through the rotation of the rotating rod, so that the hair brush on the first cleaning rod can clean the coal dust impurities adhered to the first filter screen, the hair brush on the second cleaning rod can clean the coal dust impurities adhered to the second filter screen, and the cleaned coal dust impurities fall into the dust collection box in the dust collection cavity;

6) the dust collection box is drawn out from the dust collection cavity by using the handle, and the dust collection box is installed back into the dust collection cavity after coal dust impurities in the dust collection box are poured out.

Has the beneficial effects.

One, can carry out the secondary dust fall with the coal dust in the air among the air suction the device, avoid spraying water smoke in a large number in the colliery tunnel and carry out the dust fall for moist muddy in the tunnel.

Secondly, can tentatively spray the dust fall back to the air in the pit, the rethread first filter screen cooperation second filter screen carries out the secondary to the remaining coal dust of air in the pit and filters the dust fall, and the dust fall effect is better.

Thirdly, through the first clean pole of dwang cooperation, the clean pole of second, can clear away the coal dust impurity of adhesion on first filter screen and the second filter screen.

Fourthly, the dust collecting chamber is matched with the dust collecting box, so that the coal dust impurities falling after being removed can be collected and cleaned.

Drawings

Fig. 1 is a three-dimensional structure diagram of an automatic dust falling device of the invention;

FIG. 2 is a schematic structural diagram of an automatic dust-settling device according to the present invention; it shows only the structure at the spray cylinder;

fig. 3 is a perspective view of an automatic dust falling apparatus according to the present invention, which shows only the structure at the filter cartridge;

fig. 4 is a perspective view of an automatic dust falling device according to the present invention, which shows only the structure of the rotating rod;

fig. 5 is a schematic structural diagram of embodiment 2 of the automatic dust falling device of the present invention, which only shows the structure at the rotating rod.

In the attached drawings

Wherein the method comprises the following steps: the dust collector comprises a spray cylinder (1), an air suction pipe (2), a spiral spray pipe (3), a connecting pipe (4), a filter cylinder (5), a rotating motor (6), a dust collection cavity (7), a dust collection box (8), a sewage discharge cylinder (9), a sewage discharge pipe (10), a suction fan (11), a spray header (12), a drainage plate (13), a first filter screen (14), a first cleaning rod (15), a second cleaning rod (16), a brush (17), a second filter screen (18), a rotating rod (19), an air outlet pipe (20), a third cleaning rod (21) and a fourth cleaning rod (22).

The specific implementation mode is as follows:

example 1:

the invention discloses an automatic dust settling device, which is realized by the following steps: comprises a spraying component for primarily spraying and dedusting underground air, a connecting pipe (4) and a filtering component for secondarily filtering and dedusting residual coal dust in the underground air,

it is characterized in that one end of the connecting pipe (4) is communicated with the spraying component, the other end is communicated with the filtering component,

the spray assembly consists of a spray cylinder (1), an air suction pipe (2), a spiral spray pipe (3), a sewage discharge cylinder (9), a sewage discharge pipe (10), a suction fan (11), a spray header (12) and a drainage plate (13),

the spray cylinder (1) is communicated with the air suction pipe (2), the suction fan (11) is arranged in the air suction pipe (2),

preferably, the spraying cylinder (1) is of a cylindrical structure, the air suction pipe (2) is close to one end of the spraying cylinder (1),

the spray cylinder (1) is communicated with one end of the connecting pipe (4),

preferably, the connecting pipe (4) is close to the other end of the spray cylinder (1),

a sewage draining cylinder (9) is arranged at the other end of the spraying cylinder (1),

preferably, the blowdown cylinder (9) is of a cylindrical structure, the diameter of the blowdown cylinder (9) is gradually reduced from one end to the other end,

one end of the sewage discharge cylinder (9) is communicated with the spray cylinder (1), the other end is communicated with a sewage discharge pipe (10),

the spiral spray pipe (3) is coiled on the outer wall of the spray cylinder (1), a plurality of spray heads (12) are arranged on the spiral spray pipe (3), one end of each spray head (12) is communicated with the spiral spray pipe (3), the other end of each spray head (12) penetrates through the cylinder wall of the spray cylinder (1) and extends into the spray cylinder (1),

preferably, the spray header (12) extends obliquely downwards towards the direction of the central line of the spray cylinder (1),

two groups of drainage plates (13) are arranged on the inner wall of the spray cylinder (1) at equal intervals along the circumferential direction, the drainage plates (13) consist of a plurality of drainage plates (13),

preferably, two groups of the drainage plates (13) are arranged in a staggered way, the plurality of drainage plates (13) in the same group are arranged at equal intervals along the central line direction of the spray cylinder (1),

preferably, one end of the drainage plate (13) and the inner wall of the spray cylinder (1) form an acute included angle and extend downwards in an inclined way, the other end is vertically bent downwards,

the filter component consists of a filter cartridge (5), a rotating motor (6), a dust collecting cavity (7), a dust collecting box (8), a first filter screen (14), a first cleaning rod (15), a second cleaning rod (16), a brush (17), a second filter screen (18), a rotating rod (19) and an air outlet pipe (20),

one end of the filter cartridge (5) is communicated with the other end of the connecting pipe (4),

preferably, the filter cartridge (5) is of cylindrical construction,

a first filter screen (14) is arranged in the filter cartridge (5) through a filter screen frame, a second filter screen (18) is arranged in the filter cartridge (5) through the filter screen frame,

preferably, the filter screen frame is in a cross structure,

preferably, the filter screen is of a circular structure,

a rotating motor (6) is arranged in the middle of the other end of the filter cartridge (5), the other end of the filter cartridge (5) is communicated with an air outlet pipe (20),

preferably, the air outlet pipe (20) is positioned below the rotating motor (6),

a rotating rod (19) is arranged on the rotating motor (6),

preferably, the rotating rod (19) is positioned in the filter cartridge (5),

one end of the rotating rod (19) passes through the other end of the filter cartridge (5) and is connected with the rotating motor (6), the other end is connected with the crisscross part of the filter screen frame through a bearing,

preferably, a sealing bearing is arranged between the rotating rod (19) and the filter cylinder (5),

preferably, the other end of the rotating rod (19) is positioned between the first filter screen (14) and the second filter screen (18),

a first cleaning rod (15) is arranged on the rotating rod (19), a second cleaning rod (16) is arranged on the rotating rod (19),

preferably, the first cleaning bar (15) is located between the first filter (14) and the second filter (18) and is adjacent to the first filter (14), the second cleaning bar (16) is located between the first filter (14) and the second filter (18) and is adjacent to the second filter (18),

a row of hairbrushes (17) are arranged on the first cleaning rod (15), one end of each hairbrush (17) is connected with the first cleaning rod (15), the other end of each hairbrush (17) is contacted with the first filter screen (14),

a row of hairbrushes (17) are arranged on the second cleaning rod (16), one end of the hairbrush (17) is connected with the second cleaning rod (16), the other end is contacted with a second filter screen (18),

a dust collecting cavity (7) is arranged on the filter cylinder (5), the dust collecting cavity (7) is communicated with the filter cylinder (5),

preferably, the dust collection chamber (7) is of a rectangular structure, the length of the dust collection chamber (7) is the same as the diameter of the filter cartridge (5),

the dust collection chamber (7) is positioned under the first filter screen (14) and the second filter screen (18),

the dust collection box (8) is detachably arranged in the dust collection cavity (7) through a handle,

preferably, the dust collection box (8) is positioned at the bottom of the dust collection cavity (7);

preferably, the first filter screen (14) is composed of a stainless steel wire mesh, the stainless steel wire mesh is a special filter material of the filter device, is rolled into a wave mesh shape and is overlapped with each other in a crossing way at a correct angle, and the filter screens are folded and expanded in multiple layers and are arranged from thick to thin in different densities and apertures, so that the flowing direction of sewage is changed for multiple times when the sewage passes through the filter screens, and the filtering efficiency of the filter screens is improved;

preferably, the second filter screen (18) is made of a stainless steel wire mesh;

the invention also relates to an automatic dust settling method, which is characterized by comprising the following steps:

1) the automatic dust settling device is fixedly arranged on the side wall of a coal mine underground roadway, so that a blow-off pipe (10) is positioned above a drainage groove at the edge of the coal mine roadway;

2) communicating a spiral spray pipe (3) with a water pump, communicating an air outlet pipe (20) with an aspirator, simultaneously starting the water pump, the aspirator and a suction fan (11) in an air suction pipe (2), and sucking turbid air in a coal mine into a spray cylinder (1);

3) after being sucked into the spray cylinder (1), the turbid air slowly flows along the drainage plates (13), the spray head (12) is opened, water mist sprayed by the spray head (12) is used for carrying out primary dust fall treatment on granular coal dust in the turbid air, and the generated sewage is finally collected by the drainage cylinders (9) and flows into a drainage groove through the drainage pipe (10) under the drainage action of the drainage plates (13);

4) air subjected to primary dust fall treatment in the spraying cylinder (1) flows into the filter cylinder (5) through the connecting pipe (4), secondary dust fall is carried out on granular coal dust remaining in the air under the filtering action of the first filter screen (14) and the second filter screen (18), and the air subjected to double dust fall is sucked into the air outlet pipe (20) under the suction action of the suction machine and is discharged;

5) when the first filter screen (14) and the first filter screen (14) are pushed up to accumulate too many coal dust impurities to influence the filtering effect, the rotating motor (6) is started, the first cleaning rod (15) and the second cleaning rod (16) are driven to rotate through the rotation of the rotating rod (19), so that the brush (17) on the first cleaning rod (15) removes the coal dust impurities adhered to the first filter screen (14), the brush (17) on the second cleaning rod (16) removes the coal dust impurities adhered to the second filter screen (18), and the removed coal dust impurities fall into the dust collection box (8) in the dust collection cavity (7);

6) the dust collection box (8) is drawn out from the dust collection cavity (7) by using a handle, and the dust collection box (8) is installed back into the dust collection cavity (7) after coal dust impurities in the dust collection box (8) are poured out;

example 2:

this example differs from example 1 in that: third cleaning rod (21) is arranged on the rotating rod (19), the third cleaning rod (21) and the first cleaning rod (15) are symmetrically distributed about the rotating rod (19), a fourth cleaning rod (22) is arranged on the rotating rod (19), the fourth cleaning rod (22) and the second cleaning rod (16) are symmetrically distributed about the rotating rod (19), the third cleaning rod (21) is positioned between the first filter screen (14) and the second filter screen (18) and is close to the first filter screen (14), the fourth cleaning rod (22) is positioned between the first filter screen (14) and the second filter screen (18) and is close to the second filter screen (18), a row of brushes (17) is arranged on the third cleaning rod (21), one end of each brush (17) is connected with the third cleaning rod (21), the other end of each brush is contacted with the first filter screen (14), a row of brushes (17) is arranged on the fourth cleaning rod (22), one end of the brush (17) is connected with the fourth cleaning rod (22), and the other end of the brush is contacted with the second filter screen (18); when in use, the cleaning speed of the coal dust impurities accumulated on the first filter screen (14) and the second filter screen (18) can be improved;

the sewage discharge cylinder (9) is of a cylindrical structure, and the diameter of the sewage discharge cylinder (9) is gradually reduced from one end to the other end, so that sewage generated by primary spraying dust fall can be collected and is convenient to discharge from a discharge pipe;

the spray header (12) extends obliquely downwards towards the direction of the central line of the spray cylinder (1), so that underground air entering the spray cylinder (1) can be better intensively sprayed and dusted;

the two groups of the drainage plates (13) are arranged in a staggered mode, and the drainage plates (13) in the same group are arranged at equal intervals along the central line direction of the spray cylinder (1), so that the flow speed of underground air in the spray cylinder (1) can be reduced, the detention time of the underground air in the spray cylinder (1) is prolonged, and preliminary spray dust reduction of the underground air in the spray cylinder (1) is more sufficient;

one end of the drainage plate (13) and the inner wall of the spray cylinder (1) form an acute included angle and extend downwards in an inclined mode, and the other end of the drainage plate is bent downwards in a vertical mode, so that sewage generated by primary spraying and dust falling can be drained, the sewage can smoothly flow into the sewage discharge cylinder (9), and meanwhile impurities in the sewage are prevented from being accumulated on the drainage plate (13);

the length of the dust collection cavity (7) is the same as the diameter of the filter cartridge (5), and the dust collection cavity (7) is arranged right below the first filter screen (14) and the second filter screen (18), so that coal dust impurities falling off after cleaning can directly fall into the dust collection cavity (7) for collection;

the spiral spray pipe (3) is matched with the spray head (12) and can carry out preliminary spray dust reduction on underground air sucked into the spray cylinder (1);

the first filter screen (14) is matched with the second filter screen (18) and can perform secondary filtration and dust reduction on coal dust remained in underground air;

the first cleaning rod (15) and the second cleaning rod (16) are matched with a brush (17), so that coal dust impurities adhered to the first filter screen (14) and the second filter screen (18) can be removed;

the dust collection chamber (7) is matched with the dust collection box (8) and can collect and clean coal dust impurities falling after being cleaned;

the purposes of sucking underground air into the spray cylinder (1) for preliminary spraying dust reduction and secondarily filtering and reducing dust of residual coal dust in the underground air through the first filter screen (14) and the second filter screen (18) in the filter cylinder (5) are achieved.

It should be further noted that, while the above specific embodiments are described for simplicity and clarity, only the differences from other embodiments are described, but those skilled in the art should understand that the above specific embodiments are independent technical solutions.

Claims (10)

1. The utility model provides an automatic dust device, includes to the air in the pit that spray assembly, the connecting pipe that tentatively sprays the dust fall and remain the filter assembly that the coal dust carries out the secondary filter dust fall to the air in the pit, its characterized in that: one end of the connecting pipe is communicated with the spraying assembly, and the other end of the connecting pipe is communicated with the filtering assembly.

2. The automatic dust settling device of claim 1, wherein the spray assembly comprises a spray cylinder, an air suction pipe, a spiral spray pipe, a blow-down cylinder, a blow-down pipe, a suction fan, spray headers and flow guide plates, the spray cylinder is communicated with the air suction pipe, the suction fan is arranged in the air suction pipe, the spray cylinder is of a cylindrical structure, the air suction pipe is close to one end of the spray cylinder, the spray cylinder is communicated with one end of a connecting pipe, the connecting pipe is close to the other end of the spray cylinder, the blow-down cylinder is arranged at the other end of the spray cylinder, one end of the blow-down cylinder is communicated with the spray cylinder, the other end of the blow-down cylinder is communicated with the blow-down pipe, the spiral spray pipe is coiled on the outer wall of the spray cylinder, the spiral spray pipe is provided with a plurality of spray headers, one end of the spray headers is communicated with the spiral spray pipe, the other end of the spray pipe penetrates through the wall of the spray cylinder and extends into the spray cylinder, the inner wall of the spray cylinder is provided with two flow guide plates at equal intervals along the circumferential direction, a set of the drainage plate comprises a plurality of drainage plates, and is two sets of drainage plate staggered arrangement is a plurality of in the same group the drainage plate is arranged along spray cylinder central line direction equidistance.

3. The automatic dust falling device according to claim 1, wherein the filter assembly comprises a filter cartridge, a rotary motor, a dust collecting chamber, a dust collecting box, a first filter screen, a first cleaning rod, a second cleaning rod, a brush, a second filter screen, a rotary motor and an air outlet pipe, one end of the filter cartridge is communicated with the other end of the connecting pipe, the filter cartridge is of a cylindrical structure, the first filter screen is arranged in the filter cartridge through the filter screen frame, the second filter screen is arranged in the filter cartridge through the filter screen frame, the filter screen frame is of a cross structure, the filter screen is of a circular structure, the rotary motor is arranged in the middle of the other end of the filter cartridge, the other end of the filter cartridge is communicated with the air outlet pipe, the rotary motor is provided with the rotary rod, the rotary rod is positioned in the filter cartridge, one end of the rotary rod penetrates through the other end of the filter cartridge and is connected with the rotary motor, the other end is connected through bearing and filter screen frame cross intersection, sealed bearing has been put between dwang and the cartridge filter, the dwang other end is located between first filter screen and the second filter screen, first clean pole has been put on the dwang, the clean pole of second has been put on the dwang, first clean pole overhead has one row of brush, brush one end and first clean pole are connected, and the other end and first filter screen contact, the clean pole overhead of second has one row of brush, brush one end and the clean pole of second are connected, and the other end and second filter screen contact, and the cartridge filter overhead has the dust collection chamber, dust collection chamber and cartridge filter are linked together, the dust collection chamber is located under first filter screen and the second filter screen, and the dust collection intracavity is arranged in through handle detachable to the dust collection box, the dust collection box is located the dust collection chamber bottom.

4. The automatic dust falling device of claim 3, wherein a third cleaning rod is arranged on the rotating rod, the third cleaning rod and the first cleaning rod are symmetrically distributed about the rotating rod, a fourth cleaning rod is arranged on the rotating rod, the fourth cleaning rod and the second cleaning rod are symmetrically distributed about the rotating rod, the third cleaning rod is positioned between the first filter screen and the second filter screen and is close to the first filter screen, the fourth cleaning rod is positioned between the first filter screen and the second filter screen and is close to the second filter screen, a row of brushes are arranged on the third cleaning rod, one end of each brush is connected with the third cleaning rod, the other end of each brush is contacted with the first filter screen, a row of brushes are arranged on the fourth cleaning rod, one end of each brush is connected with the fourth cleaning rod, and the other end of each brush is contacted with the second filter screen.

5. An automatic dust falling device according to claim 2, wherein the blowdown cylinder is of a cylindrical structure, and the diameter of the blowdown cylinder gradually decreases from one end to the other end.

6. The automatic dust falling device of claim 2, wherein the spray header extends obliquely downward toward the center line of the spray cylinder.

7. The automatic dust falling device according to claim 2, wherein one end of the flow guide plate and the inner wall of the spray cylinder form an acute included angle and extend downwards in an inclined mode, and the other end of the flow guide plate is bent downwards in a vertical mode.

8. The automatic dust falling device according to claim 3, wherein the air outlet pipe is positioned below the rotating motor.

9. The automatic dust falling device according to claim 3, wherein the first cleaning rod is located between the first filter screen and the second filter screen and close to the first filter screen, the second cleaning rod is located between the first filter screen and the second filter screen and close to the second filter screen, the dust collection chamber is of a rectangular structure, and the length of the dust collection chamber is the same as the diameter of the filter cylinder.

10. An automatic dust settling method using the automatic dust settling device of claim 1, comprising the steps of:

1) the automatic dust settling device is fixedly arranged on the side wall of the underground coal mine roadway, so that the blow-off pipe is positioned above the drainage groove at the edge of the coal mine roadway;

2) communicating a spiral spraying pipe with a water pump, communicating an air outlet pipe with a suction machine, starting the water pump, the suction machine and a suction fan in an air suction pipe at the same time, and sucking turbid air in the coal mine into a spraying cylinder;

3) after being sucked into the spray cylinder, the turbid air slowly flows along the drainage plates, the spray head is opened, water mist is sprayed out of the spray head to carry out primary dust fall treatment on granular coal dust in the turbid air, and the generated sewage flows into the drainage groove through the drainage pipe after being finally collected by the drainage cylinders under the drainage action of the drainage plates;

4) air subjected to primary dust-settling treatment in the spraying cylinder flows into the filter cylinder through the connecting pipe, secondary dust settling is performed on granular coal dust remaining in the air under the filtering action of the first filter screen and the second filter screen, and the air subjected to double dust settling is sucked into the air outlet pipe and is exhausted under the suction action of the suction machine;

5) when the first filter screen and the first filter screen push excessive coal dust impurities to affect the filtering effect, the rotating motor is started, the first cleaning rod and the second cleaning rod are driven to rotate through the rotation of the rotating rod, so that the hair brush on the first cleaning rod can clean the coal dust impurities adhered to the first filter screen, the hair brush on the second cleaning rod can clean the coal dust impurities adhered to the second filter screen, and the cleaned coal dust impurities fall into the dust collection box in the dust collection cavity;

6) the dust collection box is drawn out from the dust collection cavity by using the handle, and the dust collection box is installed back into the dust collection cavity after coal dust impurities in the dust collection box are poured out.

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