CN111946387A

CN111946387A - Circulated automatic spraying dust fall system in colliery underworkings

Info

Publication number: CN111946387A
Application number: CN202010842328.3A
Authority: CN
Inventors: 王建文
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-08-20
Filing date: 2020-08-20
Publication date: 2020-11-17

Abstract

The invention discloses a recyclable automatic spraying dust-settling system for an underground roadway of a coal mine, which comprises a dust-settling chamber, wherein a water tank is fixedly connected to the outer wall of the bottom side of the dust-settling chamber, a rectangular pipe is fixedly connected to a guide plate, a second motor is arranged in a housing of the dust-settling chamber, the output end of the second motor is fixedly connected with a reciprocating lead screw, a reciprocating lead screw sleeve is in threaded connection with the reciprocating lead screw, the bottom of the reciprocating lead screw sleeve is fixedly connected with an outer rod, an inner rod is slidably connected to the outer rod, a third connecting rod is fixedly connected to the bottom of the inner rod, a brush rod is rotatably connected to the third connecting rod, bristles are arranged on the brush rod, a filter screen is fixedly connected in the rectangular pipe, an opening is formed in the rectangular. The invention starts the second motor to drive the reciprocating screw rod to rotate, so as to drive the brush hair to move on the filter screen, and the dust filtered from the filter screen is pushed to one side of the filter screen and enters the collecting frame through the opening.

Description

Circulated automatic spraying dust fall system in colliery underworkings

Technical Field

The invention relates to the technical field of environment-friendly equipment, in particular to a coal mine underground roadway circulating automatic spraying dust-settling system.

Background

The coal mine is an area where people mine coal resources in a coal-rich mining area, and is generally divided into a mineworker coal mine and an opencast coal mine, when a coal seam is far away from the ground, coal is generally selected to dig into an underground excavation roadway, the mineworker coal mine is the mineworker coal mine, when the coal seam is very close to the ground, the direct stripping of a ground surface soil layer is generally selected to dig the coal, the opencast coal mine is the opencast coal mine, a large amount of dust can be generated in the process of mining the mineworker coal mine, the dust is dispersed in the roadway, the production and development of coal enterprises are influenced, the health and life of workers can be seriously damaged, and along with the gradual improvement of the national requirements on occupational health and safety of the workers, the proportion of dust prevention of the mine in' one-pass and three-. How to systematically treat mine dust becomes an unbearable problem in front of people. The spray dust settling is a novel dust settling technology, and the principle of the spray dust settling is that particles generated by spraying are extremely fine, the surface tension is basically zero, and the particles can quickly adsorb dust particles with various sizes in the air when being sprayed to the air to form effective dust control.

Current spraying dust device, because mostly carry out the dust fall in the tunnel through laying the water pipe in the tunnel and then spraying the water smoke, consequently can cause the tunnel in the moisture great and remain the sewage behind a large amount of dust fall and make the road surface wet and smooth have the potential safety hazard, and the dust after the dust fall can't be collected and still remain in the tunnel, when dry again in the tunnel, the dust can be raised again, and the dust fall effect is relatively poor.

Disclosure of Invention

The invention aims to overcome the defects that in the prior art, dust is reduced in a roadway mostly by paving a water pipe in the roadway and then spraying water mist, so that potential safety hazards exist in wet and slippery road surfaces due to large moisture in the roadway and a large amount of dust-reduced sewage remained in the roadway, dust after dust reduction cannot be collected and still remains in the roadway, and when the roadway is dried again, the dust can be lifted again, and the dust reduction effect is poor, so that the coal mine underground roadway circulating automatic spraying dust reduction system is provided.

In order to achieve the purpose, the invention adopts the following technical scheme:

a circulated automatic spraying dust-settling system for a coal mine underground roadway comprises a dust-settling chamber, wherein a roadway wall body is arranged outside the dust-settling chamber, slide rails are symmetrically and fixedly connected to the roadway wall body, grooves are formed in the slide rails, an installation rod is arranged between the two slide rails, two ends of the installation rod extend into the grooves, cavities are formed in the installation rod, a first motor is arranged on the installation rod, the output end of the first motor is fixedly connected with a worm, the worm extends into the cavities and is rotatably connected to the inner wall of the cavities, a rotating shaft is symmetrically and rotatably inserted into the cavities, a transmission mechanism is arranged in the cavities, mounting grooves are symmetrically formed in the installation rod, the rotating shaft extends into the mounting grooves and is rotatably connected to the side walls of the mounting grooves, gears are fixedly connected to the rotating shaft, the gears are positioned in the mounting grooves, and toothed plates are, the toothed plate is matched with the gear, the bottom side of the mounting rod is fixedly connected with a first connecting rod, the bottom end of the first connecting rod is fixedly connected to the dust settling chamber, the dust settling chamber is fixedly connected with an air outlet pipe, the top wall of the dust settling chamber is fixedly connected with a plurality of second connecting rods, the bottom end of each second connecting rod is fixedly connected with a first water delivery pipe, the first water delivery pipe is fixedly connected with a plurality of water outlet pipes, the water outlet pipes are provided with atomizing nozzles, the bottom wall of the dust settling chamber is fixedly inserted with an air inlet pipe, the air inlet pipe is internally provided with an air exhauster, the dust settling chamber is fixedly connected with a guide plate, the air inlet pipe extends to the upper part of the guide plate, the outer wall of the bottom side of the dust settling chamber is fixedly connected with a water tank, the guide plate is fixedly connected with a rectangular pipe, and, the dust settling chamber is characterized in that a second motor is arranged in the dust settling chamber shell, the output end of the second motor is fixedly connected with a reciprocating lead screw, the reciprocating lead screw extends into the rectangular pipe and is rotatably connected to the inner wall of the rectangular pipe, a reciprocating lead screw sleeve is connected to the reciprocating lead screw in a threaded manner, the bottom of the reciprocating lead screw sleeve is fixedly connected with an outer rod, an inner rod is connected to the outer rod in a sliding manner, the bottom of the inner rod is fixedly connected with a third connecting rod, a brush rod is rotatably connected to the third connecting rod, brush bristles are arranged on the brush rod, a filter screen is fixedly connected in the rectangular pipe and is inclined at a certain angle, the brush bristles are attached to the upper surface of the filter screen, an opening is formed in the rectangular pipe, a placing plate is fixedly connected to the outer wall of the bottom of the rectangular pipe, a collecting, the dust settling chamber is characterized in that a second water delivery pipe is fixedly connected to the output end of the water pump, the second water delivery pipe is fixedly inserted into the side wall of the water tank and the bottom wall of the dust settling chamber and extends into the dust settling chamber, the second water delivery pipe is fixedly connected to the first water delivery pipe, a water source inlet pipe is fixedly connected to the side wall of the water tank, a water source outlet pipe is fixedly connected to the side wall of the water tank, a door body is arranged on the water tank, sliding plates are symmetrically and fixedly connected to the wall of the roadway, and the dust settling chamber and the sliding plates.

Preferably, drive mechanism includes dwang, worm wheel, two first bevel gears and two second bevel gears, the dwang sets up in the cavity, worm wheel fixed connection is on the dwang, the worm wheel is connected with the worm meshing, two first bevel gear symmetry fixed connection respectively is on the dwang both ends, two second bevel gear fixed connection respectively is on the pivot top, first bevel gear and second bevel gear meshing are connected.

Preferably, the cavity is internally and symmetrically and fixedly connected with supporting rods, the supporting rods are fixedly connected with supporting sleeves, and the supporting sleeves are rotatably connected to the rotating rod.

Preferably, a bar magnet is arranged in the pipe wall at the bottom of the rectangular pipe and matched with the collecting frame.

Preferably, the collecting frame is made of a mesh metal, and the pore size of the mesh metal is the same as that of the filter screen.

Preferably, a magnetic gasket is arranged on the inner wall of the door body in a surrounding mode and matched with the water tank.

Compared with the prior art, the invention has the beneficial effects that:

1. when the dust-settling device is used, water is injected into the water tank through the water source inlet pipe, the exhaust fan and the water pump are started to absorb air in the roadway into the dust-settling chamber, the water in the water tank is conveyed to the first water pipe through the second water pipe by the water pump and is finally sprayed out from the atomizing nozzle through the water outlet pipe, dust in the air is adsorbed by the sprayed water mist, the dust is finally fallen onto the guide plate, the dust-settled air is finally conveyed into the roadway again through the air outlet pipe to settle dust of the air in the roadway, the first motor is started to rotate the worm to drive the worm wheel to rotate, the rotating rod is rotated to drive the first bevel gear to rotate, the rotating shaft is driven to rotate, the gear is rotated to drive the mounting rod to slide on the sliding rail to drive the first connecting rod to move, the dust-settling chamber is made to slide on the sliding plate to settle dust in different areas in the roadway, make and need not to spray the water smoke in the tunnel and carry out the dust fall when the dust fall, avoid causing in the tunnel that the moisture is great and remain the sewage behind a large amount of dust falls to make the wet and slippery phenomenon that has the potential safety hazard in road surface.

2. The water mist adsorbed with dust falls onto the guide plate, flows to the rectangular pipe along with the guide plate, then flows into the water tank through the rectangular pipe, when the dusted sewage passes through the filter screen, the dust in the sewage is filtered on the filter screen, the second motor is started, the reciprocating screw rod rotates to drive the reciprocating screw rod sleeve to move left and right, the outer rod moves left and right, the inner rod moves left and right, the third connecting rod moves left and right, the brush hair is driven to move on the filter screen, the dust filtered from the filter screen is pushed to one side of the filter screen, enters the collecting frame through the opening to be collected, meanwhile, the filtered water enters the water tank, is conveyed into the second water conveying pipe through the water pump and finally sprayed out through the atomizing spray head, the cyclic utilization of water resources is realized, after the dustfall work is finished, the water in the water tank is discharged through the water outlet pipe, and then the door body is opened, the collecting frame is taken out, collected dust in the collecting frame is cleaned, the dust after falling is collected and removed out of the roadway, the phenomenon that original dust can be lifted again when the roadway is dried again is avoided, and the dust falling effect is improved.

Drawings

FIG. 1 is a schematic structural diagram of the front side of a coal mine underground roadway recyclable automatic spraying dust-settling system provided by the invention;

FIG. 2 is an enlarged schematic view at A in FIG. 1;

FIG. 3 is an enlarged schematic view at B of FIG. 1;

fig. 4 is a front view of the water tank.

In the figure: 1 dust settling chamber, 2 roadway walls, 3 sliding rails, 4 mounting rods, 5 first motors, 6 worms, 7 rotating rods, 8 worm gears, 9 first bevel gears, 10 rotating shafts, 11 second bevel gears, 12 gears, 13 toothed plates, 14 first connecting rods, 15 air outlet pipes, 16 second connecting rods, 17 first water conveying pipes, 18 water outlet pipes, 19 air inlet pipes, 20 exhaust fans, 21 guide plates, 22 water tanks, 23 rectangular pipes, 24 second motors, 25 reciprocating lead screws, 26 reciprocating lead screw sleeves, 27 outer rods, 28 inner rods, 29 third connecting rods, 30 brush rods, 31 filter screens, 32 openings, 33 placing plates, 34 collecting frames, 35 bar magnets, 36 second water conveying pipes, 37 sliding plates, 38 door bodies, 39 water source inlet pipes and 40 water source outlet pipes.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

Referring to fig. 1-4, a circulated automatic spraying dust-settling system for a coal mine underground roadway comprises a dust-settling chamber 1, a roadway wall 2 is arranged outside the dust-settling chamber 1, slide rails 3 are symmetrically and fixedly connected to the roadway wall 2, grooves are formed in the slide rails 3, an installation rod 4 is arranged between the two slide rails 3, two ends of the installation rod 4 extend into the grooves, a cavity is formed in the installation rod 4, a first motor 5 is arranged on the installation rod 4, a worm 6 is fixedly connected to the output end of the first motor 5, the worm 6 extends into the cavity and is rotatably connected to the inner wall of the cavity, a rotating shaft 10 is symmetrically and rotatably inserted in the cavity, a transmission mechanism is arranged in the cavity and comprises a rotating rod 7, a worm wheel 8, two first bevel gears 9 and two second bevel gears 11, the rotating rod 7 is arranged in the cavity, supporting rods are symmetrically and fixedly connected to the, the support sleeve is rotatably connected on the rotating rod 7 to support the rotating rod 7, the worm wheel 8 is fixedly connected on the rotating rod 7, the worm wheel 8 is meshed with the worm 6, the two first bevel gears 9 are respectively and symmetrically fixedly connected on two ends of the rotating rod 7, the two second bevel gears 11 are respectively and fixedly connected on the top ends of the rotating shafts 10, the first bevel gears 9 are meshed with the second bevel gears 11, so that when the worm 6 rotates, can drive the worm wheel 8 to rotate, so that the rotating rod 7 rotates to drive the first bevel gear 9 to rotate, the second bevel gear 11 rotates to drive the rotating shaft 10 to rotate, make gear 12 rotate, the mounting groove has been seted up to the symmetry on the installation pole 4, and pivot 10 extends to in the mounting groove and rotates to be connected on the mounting groove lateral wall, fixedly connected with gear 12 on the pivot 10, and gear 12 is located the mounting groove, fixedly connected with pinion rack 13 in the recess, pinion rack 13 and gear 12 phase-match.

4 bottom side fixedly connected with head rod 14 of installation pole, head rod 14 bottom fixed connection is on the dust settling chamber 1, fixedly connected with outlet duct 15 on the dust settling chamber 1, fixedly connected with a plurality of second connecting rod 16 on the roof in the dust settling chamber 1, the first raceway 17 of 16 bottom fixedly connected with of second connecting rod, fixedly connected with a plurality of outlet pipe 18 on the first raceway 17, be equipped with atomizer on the outlet pipe 18, it has intake pipe 19 to fix the interlude on the dust settling chamber 1 diapire, be equipped with air exhauster 20 in the intake pipe 19, fixedly connected with guide plate 21 in the dust settling chamber 1, intake pipe 19 extends to guide plate 21 top.

The outer wall of the bottom side of the dust settling chamber 1 is fixedly connected with a water tank 22, a rectangular pipe 23 is fixedly connected to a guide plate 21, the rectangular pipe 23 is fixedly inserted on the bottom wall of the dust settling chamber 1 and the top wall of the water tank 22 and extends into the water tank 22, a second motor 24 is arranged in a shell of the dust settling chamber 1, the output end of the second motor 24 is fixedly connected with a reciprocating lead screw 25, the reciprocating lead screw 25 extends into the rectangular pipe 23 and is rotatably connected to the inner wall of the rectangular pipe 23, a reciprocating lead screw sleeve 26 is connected to the reciprocating lead screw 25 in a threaded manner, an outer rod 27 is fixedly connected to the bottom of the reciprocating lead screw sleeve 26, an inner rod 28 is slidably connected to the outer rod 27, a third connecting rod 29 is fixedly connected to the bottom end of the inner rod 28, a brush rod 30 is rotatably connected to the third connecting rod 29, bristles are arranged on the brush rod 30, a filter screen 31 is fixedly connected, fixedly connected with places board 33 on the lateral wall of rectangular pipe 23 bottom, it is equipped with collection frame 34 on board 33 to place, collect frame 34 and opening 32 cooperate, be equipped with bar magnet 35 in the rectangular pipe 23 bottom pipe wall, bar magnet 35 cooperatees with collection frame 34, make collection frame 34 receive bar magnet 35's attraction and hug closely on rectangular pipe 23, collect frame 34 and comprise netted metal, netted metal aperture size is the same with filter screen 31's aperture size, make the part get into the water in collecting frame 34 through opening 32, the downward seepage of frame 34 is collected to the accessible.

Be equipped with the water pump in the water tank 22, water pump output end fixedly connected with second raceway 36, second raceway 36 is fixed respectively and alternates on water tank 22 lateral wall and the 1 diapire of dust settling chamber and extend to in the dust settling chamber 1, second raceway 36 fixed connection is on first raceway 17, fixedly connected with water source advances pipe 39 on the water tank 22 lateral wall, fixedly connected with water source exit tube 40 on the water tank 22 lateral wall, be equipped with a body 38 on the water tank 22, the winding is provided with the magnetic gasket on the 38 inner walls of the body, magnetic gasket and water tank 22 phase-match, strengthen water tank 22's leakproofness, avoid the rivers play in the water tank 22, symmetrical fixedly connected with slide 37 on the tunnel wall body 2, dust settling chamber 1 and sliding connection are on slide 37.

In the invention, when a user uses the device, water is injected into the water tank 22 through the water source inlet pipe 39, then the exhaust fan 20 and the water pump are started, air in a tunnel is absorbed into the dust settling chamber 1, the water in the water tank 22 is conveyed to the first water pipe 17 through the second water pipe 36 by the water pump, the water is finally sprayed out from the atomizing spray head through the water outlet pipe 18, dust in the air is adsorbed by the sprayed water mist, the dust is finally fallen onto the guide plate 21, the dusted air is finally conveyed into the tunnel again through the air outlet pipe 15, the air in the tunnel is settled, meanwhile, the first motor 5 is started, the worm 6 is rotated to drive the worm wheel 8 to rotate, the rotating rod 7 is rotated to drive the first bevel gear 9 to rotate, the second bevel gear 11 is rotated to drive the rotating shaft 10 to rotate the gear 12, the mounting rod 4 slides on the sliding rail 3 to drive the first connecting rod 14 to move, the dust settling chamber 1 slides on the sliding plate 37 to perform dust settling on different areas in a roadway, water mist with dust adsorbed on the dust falls onto the guide plate 21, then flows to the rectangular pipe 23 along with the guide plate 21, and then flows into the water tank 22 through the rectangular pipe 23, when the dusted sewage passes through the filter screen 31, the dust in the sewage is filtered on the filter screen 31, the second motor 24 is started, the reciprocating screw 25 is rotated to drive the reciprocating screw sleeve 26 to move left and right, the outer rod 27 to move left and right, the inner rod 28 to move left and right, the third connecting rod 29 to move left and right, the brush rod 30 to move left and right, bristles to move on the filter screen 31, the dust filtered on the filter screen 31 is pushed to one side of the filter screen 31 to enter the collecting frame 34 through the opening 32 to be collected, meanwhile, the filtered water enters the water tank 22, is conveyed to the second water conveying pipe 36 through the water pump and finally sprayed out by the atomizing nozzle, realize the cyclic utilization of water resource, after the dust fall work is accomplished, discharge the water in the water tank 22 through water source exit tube 40, then open door body 38, take out collection frame 34, clear up the dust of the inside collection of collection frame 34.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims

1. The circulated automatic spraying dust-settling system for the coal mine underground roadway comprises a dust-settling chamber (1) and is characterized in that a roadway wall body (2) is arranged outside the dust-settling chamber (1), slide rails (3) are symmetrically and fixedly connected to the roadway wall body (2), grooves are formed in the slide rails (3), an installation rod (4) is arranged between the two slide rails (3), two ends of the installation rod (4) extend into the grooves, a cavity is formed in the installation rod (4), a first motor (5) is arranged on the installation rod (4), a worm (6) is fixedly connected to the output end of the first motor (5), the worm (6) extends into the cavity and is rotatably connected to the inner wall of the cavity, a rotating shaft (10) is symmetrically and rotatably inserted in the cavity, a transmission mechanism is arranged in the cavity, and installation grooves are symmetrically formed in the installation rod (4), the dust-removing device is characterized in that the rotating shaft (10) extends into the mounting groove and is rotatably connected to the side wall of the mounting groove, a gear (12) is fixedly connected to the rotating shaft (10), the gear (12) is located in the mounting groove, a toothed plate (13) is fixedly connected to the inner side of the groove, the toothed plate (13) is matched with the gear (12), a first connecting rod (14) is fixedly connected to the bottom side of the mounting rod (4), the bottom end of the first connecting rod (14) is fixedly connected to the dust-removing chamber (1), an air outlet pipe (15) is fixedly connected to the dust-removing chamber (1), a plurality of second connecting rods (16) are fixedly connected to the inner top wall of the dust-removing chamber (1), a first water pipe (17) is fixedly connected to the bottom end of the second connecting rods (16), a plurality of water outlet pipes (18) are fixedly connected to the first water pipe (17, an air inlet pipe (19) is fixedly inserted into the bottom wall of the dust settling chamber (1), an exhaust fan (20) is arranged in the air inlet pipe (19), a guide plate (21) is fixedly connected into the dust settling chamber (1), the air inlet pipe (19) extends to the position above the guide plate (21), a water tank (22) is fixedly connected onto the outer wall of the bottom side of the dust settling chamber (1), a rectangular pipe (23) is fixedly connected onto the guide plate (21), the rectangular pipe (23) is fixedly inserted into the top wall of the bottom wall and the water tank (22) of the dust settling chamber (1) and extends into the water tank (22), a second motor (24) is arranged in a shell of the dust settling chamber (1), a reciprocating lead screw (25) is fixedly connected to the output end of the second motor (24), the reciprocating lead screw (25) extends into the rectangular pipe (23) and is rotatably connected onto the inner wall of the rectangular pipe (23), and a reciprocating lead screw sleeve (26) is connected, the reciprocating screw rod sleeve is characterized in that an outer rod (27) is fixedly connected to the bottom of the reciprocating screw rod sleeve (26), an inner rod (28) is connected to the outer rod (27) in a sliding manner, a third connecting rod (29) is fixedly connected to the bottom of the inner rod (28), a brush rod (30) is connected to the third connecting rod (29) in a rotating manner, bristles are arranged on the brush rod (30), a filter screen (31) is fixedly connected to the inner side of the rectangular pipe (23), the filter screen (31) is inclined at a certain angle, the bristles are attached to the upper surface of the filter screen (31), an opening (32) is formed in the rectangular pipe (23), a placing plate (33) is fixedly connected to the outer side wall of the bottom of the rectangular pipe (23), a collecting frame (34) is arranged on the placing plate (33), the collecting frame (34) is matched with the opening (32), a water pump is arranged in the water tank (, second raceway (36) are fixed respectively and are alternates on water tank (22) lateral wall and dust settling chamber (1) diapire and extend to in dust settling chamber (1), second raceway (36) fixed connection is on first raceway (17), fixedly connected with water source advances pipe (39) on the water tank (22) lateral wall, fixedly connected with water source exit tube (40) on the water tank (22) lateral wall, be equipped with a body (38) on water tank (22), symmetry fixedly connected with slide (37) on tunnel wall body (2), dust settling chamber (1) and sliding connection are on slide (37).

2. The automatic circulated spraying dust suppression system for the underground coal mine roadway according to claim 1, wherein the transmission mechanism comprises a rotating rod (7), a worm wheel (8), two first bevel gears (9) and two second bevel gears (11), the rotating rod (7) is arranged in a cavity, the worm wheel (8) is fixedly connected to the rotating rod (7), the worm wheel (8) is meshed with a worm (6), the two first bevel gears (9) are respectively and symmetrically fixedly connected to two ends of the rotating rod (7), the two second bevel gears (11) are respectively and fixedly connected to the top end of a rotating shaft (10), and the first bevel gears (9) are meshed with the second bevel gears (11).

3. The coal mine underground roadway circulating automatic spraying dust-settling system according to claim 2, wherein supporting rods are symmetrically and fixedly connected in the cavity, supporting sleeves are fixedly connected on the supporting rods, and the supporting sleeves are rotatably connected on the rotating rods (7).

4. The coal mine underground roadway circulating automatic spraying dust-settling system according to claim 1, wherein a bar magnet (35) is arranged in the bottom pipe wall of the rectangular pipe (23), and the bar magnet (35) is matched with the collecting frame (34).

5. The coal mine underground roadway circulating automatic spraying dust-settling system as claimed in claim 1, wherein the collecting frame (34) is made of reticular metal, and the pore size of the reticular metal is the same as that of the filter screen (31).

6. The coal mine underground roadway circulating automatic spraying dust-settling system as claimed in claim 1, wherein a magnetic gasket is arranged on the inner wall of the door body (38) in a surrounding mode and matched with the water tank (22).