CN210674608U - Building site construction dust collector - Google Patents

Abstract

The utility model provides a building site construction dust collector, belongs to building dust collecting equipment technical field for remove dust to building site. The technical scheme is as follows: the dolly is the rectangle box, and two parallel push rods of upper portion fixedly connected with of dolly are connected with the holding rod between the push rod, and dolly bottom fixedly connected with removes the wheel, and the blowdown door that can open is installed to dolly lower part one side, and the spraying gun passes through the spraying gun rotating device and installs on the dolly top surface, cleans mechanism fixed connection in the bottom surface below of dolly, cleans mechanism and dolly and be the liftable and be connected, and fan mechanism installs and cleans between mechanism and the dolly bottom surface, and fan mechanism upper portion is linked together with the dolly cavity. The utility model relates to a rationally, practical, dust removal effect is good, can effectively clean dust removal and aerial dust fall to construction site, makes dust collection efficiency show the improvement when cost greatly reduced, provides the guarantee for site worker's healthy, has improved work efficiency, has also protected the environment.

Description

A construction site dust removal device

technical field

The utility model relates to a device for dust removal during construction on a construction site, belonging to the technical field of construction dust removal equipment.

Background technique

In the process of construction, dust and dust are inevitably generated. These dust and dust are raised by wind and other reasons to form fugitive dust, causing serious pollution to the surrounding air environment, not only harming the health of construction workers, but also affecting the growth of plants. Dust pollution is not only the main pollution of construction sites, but also the main pollution of cities at present. After statistics, it is found that the total dust emission from cement use and its related dust accounts for 35% of the total construction dust. It can be said that the dust emission during the use of cement is the main source of construction dust. Dust is divided into two types: falling dust and floating dust. The falling dust particles are larger, with a particle size of more than ten microns, and can quickly land on the ground; the floating dust particles are small, with a particle size of less than ten microns, and float in the air for a long time. Most of the dust formed on the construction site is falling dust, with a particle size of ten to one hundred microns, among which the particle size of cement dust is about one hundred microns. The dust pollutants at the construction site generally have a relatively high concentration, and the construction workers work in the environment of dust pollutants for a long time, which has serious harm to human health. At present, there are the following problems in removing dust pollution from construction sites:

1. Most of the existing technologies are to humidify the dust on the construction site, but after a period of time, the water in the dust evaporates and will regenerate dust. If the dust on the ground is not cleaned, it will accumulate more and more, which will be harmful to the environment. and cause great harm to the human body;

2. Most of the current dust removal devices are inconvenient to move, and the cost of convenient movement will be very high, which affects the general use in most construction sites.

Utility model content

The technical problem to be solved by the utility model is to provide a dust removal device for construction sites, which can effectively clean and vacuum the dust on the ground, and can also reduce the dust in the air, and can walk and move, and has the advantages of dust removal. Features of high efficiency and low cost.

The technical solutions to solve the above technical problems are:

A construction site dust removal device, which includes a trolley, a cleaning mechanism, a fan mechanism, a spray gun and a spray gun rotating device. The trolley is a rectangular box body, and the upper part of the trolley is fixedly connected with two parallel push rods. There is a grip rod, a moving wheel is fixedly connected to the bottom of the trolley, an openable sewage door is installed on one side of the lower part of the trolley, the spray gun is installed on the top surface of the trolley through the spray gun rotating device, and the cleaning mechanism is fixedly connected to the bottom of the trolley. The mechanism and the trolley are connected up and down, the fan mechanism is installed between the cleaning mechanism and the bottom surface of the trolley, and the upper part of the fan mechanism is communicated with the trolley chamber.

In the above-mentioned construction site dust removal device, the cleaning mechanism is composed of a cleaning motor, a cleaning device rotating shaft, a cleaning device rotating rod, and a cleaning device. The cleaning motor is fixedly installed in the center of the lower bottom surface of the trolley. The shaft is connected with the upper end of the rotating shaft of the cleaner, the lower end of the rotating shaft of the cleaner is vertically connected with the center of the rotating rod of the cleaner, and the two ends of the rotating rod of the cleaner are respectively connected with the cleaner. The cleaner rotating rod drives the cleaner to rotate.

In the above-mentioned construction site dust removal device, the cleaner is composed of a ring top surface, an annular side wall and a cleaning brush, the ring top surface is fixedly connected with the cleaning device rotating rod, and the upper end of the ring side wall is connected to the outer edge of the ring top surface. Vertically connected, the lower end of the annular side wall is inclined to the central axis of the top surface of the ring, the lower bottom surface of the ring top surface is fixed with a cleaning brush, the front end of the bristles of the cleaning brush protrudes from the lower end of the annular side wall, and the bristles of the cleaning brush are in contact with the ground. touch.

The above-mentioned construction site dust removal device, the rotating shaft of the cleaning device and the rotating rod of the cleaning device are connected up and down, the middle of the rotating rod of the cleaning device is welded with a casing, the inner hole of the casing is located in the vertical direction, and the diameter of the inner hole of the casing is the same as the diameter of the inner hole. The outer diameter of the rotating shaft of the cleaner is matched, the lower end of the rotating shaft of the cleaner is inserted into the casing, there is a hole on the wall of the casing, and there are two pin holes on the rotating shaft of the cleaner along the vertical direction, two The positions of the holes correspond to the working and lifting positions of the cleaning brush respectively, and the pin shaft connects the cleaning device rotating rod and the cleaning device rotating shaft through the insertion hole and the pin shaft hole.

The above-mentioned construction site dust removal device, the fan mechanism is composed of a fan fixed pipe, a cross support frame, a fan motor, a fan blade, a fan protection net, and a dust exhaust pipe. The two fan fixed pipes are placed vertically and parallel, and the inner diameter of the fan fixed pipe is the same as The outer diameters of the fan blades match, and the two fan fixing pipes are located in the inner hole of the top surface of the circular ring of the cleaner. The upper ends of the two fan fixing pipes are respectively fixedly connected to the lower bottom surface of the trolley. In the tube cavity, the fan motor is fixedly connected under the cross support frame, the fan blade is connected with the motor shaft of the fan motor, there is a fan protection net under the fan blade, and the outer circumference of the fan protection net is connected to the pipe wall of the fan fixing pipe, The upper ends of the two fan fixing pipes are respectively connected with the lower ends of the two dust exhaust pipes, and the upper parts of the two dust exhaust pipes extend into the inner cavity of the trolley.

In the above-mentioned construction site dust removal device, the spray gun is composed of a barrel, a water pipe joint, an annular water pipe, and a high-pressure nozzle. The diameter of the front end, the water pipe joint is fixed on the outer wall of the front end of the barrel, the annular water pipe is fixed in the inner cavity of the barrel cylinder, the plane of the annular water pipe is perpendicular to the length direction of the barrel cylinder, and there are many installations on the front of the annular water pipe. The high-pressure nozzles are evenly distributed on the circumference of the annular water pipe, and the spraying direction of the high-pressure nozzles is opposite to the opening at the front end of the barrel.

In the above-mentioned construction site dust removal device, the spray gun rotating device is composed of a support seat, a support rod, a spray gun rotating shaft and a telescopic rod. The support seat is fixedly connected to the top surface of the trolley, and the lower ends of the two parallel support rods are connected to the support seat Vertical fixed connection, the upper ends of the two support rods are connected to the horizontal spray gun rotating shaft, the spray gun barrel is connected with the spray gun rotating shaft, the telescopic rod is placed obliquely, the lower end of the telescopic rod is connected with the front end of the support base, the telescopic rod The upper end of the spray gun is connected to the lower bottom surface of the front of the barrel of the spray gun.

In the above-mentioned construction site dust removal device, the sewage door at the lower part of the trolley is hinged with the side wall of the trolley through the sewage door rotating shaft, the sewage door is fixedly connected with a connecting block, and the connecting block is provided with connecting bolts, and the connecting block and the trolley are connected and fixed by connecting bolts.

The beneficial effects of the present utility model are:

The trolley of the utility model can move and walk, and can clean the construction site in all directions; the cleaning mechanism can clean the dust on the ground, and can be lifted and lowered without affecting the movement; the fan mechanism can send the dust swept up by the cleaner through the sewage pipe. Enter the trolley, and then clean the dust in the trolley through the sewage door; the spray gun can rotate the spray to spray and dust the air on the construction site, which greatly improves the dust removal efficiency on the construction site.

The design of the utility model is reasonable and practical, the dust removal effect is good, the construction site can be effectively cleaned and dedusted and airborne dust can be removed, and the working environment of the construction site can be better adapted. , to provide protection for the physical health of on-site workers, improve work efficiency, and protect the environment.

Description of drawings

Fig. 1 is the structural representation of the present utility model;

Figure 2 is a schematic top view of a cleaner and a fan;

Figure 3 is a schematic side view of the fan;

Figure 4 is a schematic diagram of the internal structure of the spray cannon.

The marks in the figure are as follows: trolley 1, push rod 2, grip rod 3, moving wheel 4, sewage door 5, sewage door rotating shaft 6, connecting block 7, connecting bolt 8, spray gun 9, support seat 10, support rod 11, spray Cannon rotation shaft 12, telescopic rod 13, cleaning motor 14, cleaner rotation shaft 15, cleaner rotation rod 16, cleaner 17, annular top surface 18, annular side wall 19, cleaning brush 20, fan fixing pipe 21, cross Support frame 22 , fan motor 23 , fan blade 24 , fan protection net 25 , dust exhaust pipe 26 , gun barrel 27 , water pipe joint 28 , annular water pipe 29 , and high-pressure nozzle 30 .

Detailed ways

The utility model is composed of a trolley 1, a cleaning mechanism, a fan mechanism, a spray gun 9 and a spray gun rotating device.

FIG. 1 shows that the trolley 1 includes a push rod 2 , a grip rod 3 , a moving wheel 4 , a sewage door 5 , a sewage door rotating shaft 6 , a connecting block 7 , and a connecting bolt 8 .

Figure 1 shows that the trolley 1 is a rectangular box. The upper part of the trolley 1 is fixedly connected with two parallel push rods 2, and a grip rod 3 is connected between the push rods 2. Four moving wheels 4 are fixedly installed at the four corners of the bottom of the trolley 2, and the moving wheels 4 are universal wheels. The operator can push the trolley 1 to the position that needs to be dust-removed through the grip rod 3 and the push rod 2 for cleaning and dust removal.

Figure 1 shows that the openable sewage door 5 is installed on the lower side of the trolley 1. The sewage door is hinged to the trolley through the sewage door rotating shaft. The sewage door is fixedly connected with a connecting block, and there are connecting bolts on the connecting block. The connecting block and the trolley are connected by Bolted connection. The operator can open the drain door 5 to remove the dust.

1 and 2 show that the cleaning mechanism is fixedly connected under the bottom surface of the trolley 1 , and the cleaning mechanism includes a cleaning motor 14 , a cleaning device rotating shaft 15 , a cleaning device rotating rod 16 , and a cleaning device 17 .

The cleaning motor 14 is fixedly installed in the center of the lower bottom surface of the trolley 1, the motor shaft of the cleaning motor 14 is vertically downward, the motor shaft is connected with the upper end of the cleaning device rotating shaft 15, and the lower end of the cleaning device rotating shaft 15 is connected with the cleaning device rotating rod 16. The center is connected vertically, the two ends of the cleaning device rotating rod 16 are respectively connected with the cleaning device 17, and the cleaning motor 14 drives the cleaning device 17 to rotate through the cleaning device rotating shaft 15 and the cleaning device rotating rod 16.

As shown in FIGS. 1 and 2 , the cleaning device 17 is composed of an annular top surface 18 , an annular side wall 19 and a cleaning brush 20 . The annular top surface 18 is fixedly connected to the cleaning device rotating rod 16, the upper end of the annular side wall 19 is vertically connected to the outer edge of the annular top surface 18, and the lower end of the annular side wall 19 is inclined to the central axis of the annular top surface 18. A cleaning brush 20 is fixed on the lower bottom surface of the ring top surface 18 . The front end of the bristles of the cleaning brush 20 protrudes from the lower end of the annular side wall 19 , and the bristles of the cleaning brush 20 are in contact with the ground. During operation, the sweeper 17 is driven by the sweeper rotating rod 16 to rotate, and the sweeping brush 20 rotates in a circular manner to sweep up the dust on the ground. Suck the dust away.

1 and 2 show that the cleaning mechanism and the trolley 1 are connected in a liftable manner, so that the cleaning mechanism does not contact the ground when the trolley 1 moves, and does not affect the movement of the trolley 1 . The rotating shaft 15 of the cleaner and the rotating rod 16 of the cleaner are connected up and down, the middle of the rotating rod 16 of the cleaner is welded with a sleeve, the inner hole of the sleeve is in the vertical direction, and the diameter of the inner hole of the sleeve is the same as the diameter of the rotating shaft 15 of the cleaner. The outer diameters are matched, and the lower end of the rotating shaft 16 of the cleaner is inserted into the casing. There is a hole on the casing wall, and there are two pin holes on the rotating shaft 15 of the cleaner along the vertical direction. The positions of the two pin holes correspond to the working and lifting positions of the cleaning brush respectively. The pin passes through the hole and the pin. The shaft hole connects the cleaner rotating rod 16 and the cleaner rotating shaft 15 . When the trolley 1 is moving, connect the pin shaft to the upper pin shaft hole, lift the cleaning device rotating rod 16 upward, and the cleaning brush 20 moves up with it, which is convenient for the trolley 1 to move; The pin shaft holes are connected, and the rotating rod 16 of the cleaner is lowered, and the cleaning brush 20 is moved down to contact the ground to carry out the cleaning operation.

1 and 3 show that the fan mechanism is composed of a fan fixing pipe 21 , a cross support frame 22 , a fan motor 23 , a fan blade 24 , a fan protection net 25 , and a dust exhaust pipe 26 .

The two fan fixing pipes 21 are placed vertically and parallel. The inner diameter of the fan fixing pipe 21 matches the outer diameter of the fan blade 24. The two fan fixing pipes 21 are located in the inner hole of the annular top surface 18 of the cleaner 17. The upper ends of the fixing pipes 21 are respectively fixedly connected with the lower bottom surface of the trolley 1, the cross support frame 22 is fixed in the cavity of the fan fixing pipe 21, the fan motor 23 is fixedly connected under the cross support frame 22, and the fan blades 24 are connected to the fan motor 23. The motor shaft is connected, and there is a fan protection net 25 under the fan blade 24. The outer circumference of the fan protection net 25 is connected to the pipe wall of the fan fixing pipe 21. The upper ends of the two fan fixing pipes 21 are respectively connected with the two dust exhaust pipes 26. The lower ends are connected, and the upper parts of the two dust exhaust pipes 26 extend into the inner cavity of the trolley 1 . During operation, the fan motor 23 drives the fan blade 24 to rotate, and the fan blade 24 blows upward, sucking the dust in the inner hole of the annular top surface 18 of the cleaner 17 into the fan fixing pipe 21, and going up to the exhaust along the fan fixing pipe 21. The dust pipe 26 is discharged into the inner chamber of the trolley 1 from the upper end of the dust discharge pipe 26 . The fan protection net 25 can allow airflow and dust to pass, and block objects such as large stones, so as to protect the fan blades 24 from being damaged by impact.

1 and 4 show that the spray gun 9 is composed of a barrel 27 , a water pipe joint 28 , an annular water pipe 29 and a high-pressure nozzle 30 .

The barrel 27 is a cylindrical body, the cylindrical body of the barrel 27 has a taper, and the diameter of the rear end of the barrel 27 is larger than the diameter of the front end of the barrel 27 . The water pipe joint 28 is fixed on the outer wall of the front end of the gun barrel 27 , and the water pipe joint 28 is connected with the high-pressure water pump to provide high-pressure water for the spray gun 9 to spray water. The annular water pipe 29 is fixed in the inner cavity of the cylindrical body of the barrel 27, the plane of the annular water pipe 29 is perpendicular to the length direction of the cylindrical body of the barrel 27, and 10-16 high-pressure nozzles 30 are installed on the front of the annular water pipe 29, and the high-pressure nozzles 30 The annular water pipe 29 is evenly distributed around the circumference, and the spraying direction of the high-pressure spray head 30 is opposite to the opening at the front end of the barrel 27 .

FIG. 1 shows that the spray gun rotating device is composed of a support base 10 , a support rod 11 , a spray gun rotating shaft 12 , and a telescopic rod 13 .

The support base 10 is fixedly connected to the upper surface of the trolley 1, the lower ends of the two parallel support rods 11 are vertically fixedly connected to the support base 10, the upper ends of the two support rods 11 are connected to the horizontal spray gun rotating shaft 12, and the barrel of the spray gun 9 is connected. 27 is connected with the spray gun rotating shaft 12, the telescopic rod 13 is placed obliquely, the lower end of the telescopic rod 13 is connected with the front end of the support base 10, and the upper end of the telescopic rod 13 is connected with the lower bottom surface of the front of the barrel 27 of the spray gun 9. The telescopic rod 13 adopts a manual hydraulic jack structure, and the telescopic rod 13 is the top rod of the hydraulic jack. When the telescopic rod 13 needs to be extended forward, the operator uses the pressure rod of the hydraulic jack to extend the telescopic rod 13 forward.

The use process of the present utility model is as follows:

When the utility model is in use, it is necessary to connect the cleaning motor 14 and the fan motor 23 to an external power supply through wires, provide power to the cleaning motor 14 and the fan motor 23, and connect the water pipe joint 28 of the spray gun 9 to the high-pressure water pump, Provide high-pressure water for spraying water from the spray cannon 9.

The operator holds the handle bar 3 and pushes the trolley 1 to the position where dust removal is required. When the trolley 1 is moving, the cleaning device rotating rod 16 is connected with the pin shaft hole above the cleaning device rotating shaft 15 by a pin, and the cleaning brush 20 moves upward to facilitate the movement of the trolley 1 . After reaching the cleaning position, connect the pin shaft to the pin shaft hole below the rotary shaft 15 of the cleaner, lower the rotary rod 16 of the cleaner, and move the cleaning brush 20 down to contact the ground for cleaning.

The cleaning motor 14 is started, and the cleaning motor 14 drives the cleaning device 17 to rotate through the cleaning device rotating shaft 15 and the cleaning device rotating rod 16 . The sweeping brush 20 of the sweeper 17 rotates in a circular manner to sweep up the dust on the ground. The annular top surface 18 and the annular side wall 19 of the sweeper 17 enclose the dust, so that the fan mechanism can suck the dust away.

Start the fan motor 23, the fan motor 23 drives the fan blade 24 to rotate, the fan blade 24 blows air upward, and sucks the dust in the inner hole of the annular top surface 18 of the cleaner 17 into the fan fixing pipe 21, and moves upward along the fan fixing pipe 21. into the dust discharge pipe 26 , and discharge into the inner chamber of the trolley 1 from the upper end of the dust discharge pipe 26 . The fan protection net 25 can allow airflow and dust to pass, and block objects such as large stones, so as to protect the fan blades 24 from being damaged by impact.

After the cleaning is completed, the operator opens the sewage door 5 through the connecting bolt 8 to clean out the dust in the trolley 1 .

When there is a lot of dust in the air at the construction site, open the water pipe joint 28 of the spray gun 9, turn on the high-pressure water pump, and the spray gun 9 sprays the water mist through the high-pressure nozzle 30 on the annular water pipe 29, which can reduce the dust in the air. You can also spray and dust the places where the trolley 1 does not go. During the spraying process, the spraying angle of the water mist can be controlled by the telescopic rod 13, and the places with different heights can be dedusted.

An embodiment of the present utility model is as follows:

The length of the trolley 1 is 1600mm, the width is 830mm, and the height is 780mm;

The length of the push rod 2 is 500mm and the diameter is 40mm;

The length of the sewage door 5 is 150mm and the height is 100mm;

The model of the cleaning motor 14 is YO6324;

The diameter of the rotating shaft 15 of the cleaner is 30mm;

The diameter of the cleaning device rotating rod 16 is 28mm;

The outer diameter of the annular top surface 18 of the cleaning device 17 is 350 mm, the inner diameter is 250 mm, the height of the annular side wall 19 is 200 mm, and the height of the cleaning brush 20 is 100 mm;

The diameter of the fan fixing pipe 21 is 70mm;

The diameter of the cross support frame 22 is 10mm;

The model of the fan motor 23 is YYHS-30;

The number of blades of the fan blade 24 is 6;

The diameter of the dust exhaust pipe 26 is 70mm;

The length of the support base 10 is 200mm, the width is 400mm, and the thickness is 40mm;

The length of the support rod 11 is 200mm;

The diameter of the spray gun rotating shaft 12 is 300mm;

The length of the telescopic rod 13 is 600mm;

The length of the barrel 27 of the spray gun 9 is 1500mm, the diameter of the lower end is 340mm, and the diameter of the upper end is 250mm;

The annular diameter of the annular water pipe 29 of the spray gun 9 is 210mm, and the pipe diameter of the water pipe is 21mm;

The number of high-pressure spray heads 30 is 11.

Claims (8)

1. The utility model provides a building site construction dust collector which characterized in that: it includes dolly (1), clean the mechanism, fan mechanism, spray gun (9) and spray gun rotating device, dolly (1) is the rectangle box, push rod (2) of two parallels of upper portion fixedly connected with of dolly (1), be connected with holding rod (3) between push rod (2), dolly (1) bottom fixedly connected with removes wheel (4), blowdown door (5) that can open are installed to dolly (1) lower part one side, install on the top surface of dolly (1) spray gun (9) through spray gun rotating device, clean mechanism fixed connection in the bottom surface below of dolly (1), clean mechanism and dolly (1) and be the liftable and be connected, fan mechanism installs between the bottom surface of cleaning mechanism and dolly (1), fan mechanism upper portion is linked together with the dolly cavity.

2. The dust removing device for construction site according to claim 1, wherein: cleaning mechanism is by cleaning motor (14), sweeper axis of rotation (15), sweeper dwang (16), sweeper (17) are constituteed, clean motor (14) fixed mounting at the center of bottom surface under dolly (1), the motor shaft that cleans motor (14) is perpendicular downwards, the motor shaft is connected with the upper end of sweeper axis of rotation (15), the lower extreme of sweeper axis of rotation (15) is perpendicular with the center of sweeper dwang (16) is connected, the both ends of sweeper dwang (16) are connected with sweeper (17) respectively, clean motor (14) through sweeper axis of rotation (15), sweeper dwang (16) drive sweeper (17) and rotate.

3. The dust removing device for construction site construction according to claim 2, wherein: sweeper (17) comprise ring top surface (18), annular lateral wall (19), sweeper brush (20), ring top surface (18) and sweeper dwang (16) fixed connection, the upper end of annular lateral wall (19) is connected with the outward flange of ring top surface (18) is perpendicular, the lower extreme of annular lateral wall (19) inclines to the central axis of ring top surface (18), the lower bottom surface of ring top surface (18) is fixed with sweeper brush (20), the lower extreme of annular lateral wall (19) is stretched out to the brush hair front end of sweeper brush (20), the brush hair of sweeper brush (20) contacts with ground.

4. The dust removing device for construction site construction according to claim 3, wherein: sweeper axis of rotation (15) and sweeper dwang (16) are the liftable connection, the middle welding of sweeper dwang (16) has the sleeve pipe, sheathed tube hole is located the vertical direction, the sheathed tube hole diameter matches with the external diameter of sweeper axis of rotation (15), the lower extreme of sweeper axis of rotation (15) is inserted in the sleeve pipe, there is the jack on the sleeve pipe wall, there are two round pin shaft holes along the vertical direction on sweeper axis of rotation (15), the position in two round pin shaft holes respectively with cleaning brush (20) work with mention the position corresponding, the round pin axle is connected sweeper dwang (16) and sweeper axis of rotation (15) through jack and round pin shaft hole.

5. The dust removing device for construction site according to claim 1, wherein: the fan mechanism comprises fan fixing pipes (21), a cross support frame (22), a fan motor (23), fan blades (24), a fan protection net (25) and a dust exhaust pipe (26), wherein the two fan fixing pipes (21) are vertically and parallelly arranged, the inner diameter of each fan fixing pipe (21) is matched with the outer diameter of each fan blade (24), the two fan fixing pipes (21) are positioned in an inner hole of a circular ring top surface (18) of a sweeper (17), the upper ends of the two fan fixing pipes (21) are respectively fixedly connected with the lower bottom surface of a trolley (1), the cross support frame (22) is fixed in a pipe cavity of each fan fixing pipe (21), the fan motor (23) is fixedly connected below the cross support frame (22), the fan blades (24) are connected with a motor shaft of the fan motor (23), the fan protection net (25) is arranged below the fan blades (24), the periphery of the fan protection net (25) is connected to the pipe wall of each fan fixing pipe (21), the upper ends of the two fan fixing pipes (21) are respectively connected with the lower ends of the two dust exhaust pipes (26), and the upper parts of the two dust exhaust pipes (26) extend into the inner cavity of the trolley.

6. The dust removing device for construction site according to claim 1, wherein: the fog spraying gun (9) is composed of a gun barrel (27), water pipe connectors (28), an annular water pipe (29) and high-pressure spray heads (30), the gun barrel (27) is a cylinder, the cylinder of the gun barrel (27) has conicity, the diameter of the rear end of the gun barrel (27) is larger than that of the front end of the gun barrel (27), the water pipe connectors (28) are fixed on the outer wall of the front end of the gun barrel (27), the annular water pipe (29) is fixed in the inner cavity of the cylinder of the gun barrel (27), the plane of the annular water pipe (29) is perpendicular to the length direction of the cylinder of the gun barrel (27), a plurality of high-pressure spray heads (30) are installed in front of the annular water pipe (29), the high-pressure spray heads (30) are evenly distributed on the circumference of the annular water pipe (29), and the spraying direction of the high-pressure spray heads (30) is opposite to.

7. The dust removing device for construction site according to claim 1, wherein: the spray gun rotating device is composed of a supporting seat (10), supporting rods (11), a spray gun rotating shaft (12) and a telescopic rod (13), wherein the supporting seat (10) is fixedly connected to the upper top surface of the trolley (1), the lower ends of the two parallel supporting rods (11) are fixedly connected with the supporting seat (10) in a perpendicular mode, the upper ends of the two supporting rods (11) are connected with the horizontal spray gun rotating shaft (12), a gun barrel (27) of a spray gun (9) is connected with the spray gun rotating shaft (12), the telescopic rod (13) is obliquely placed, the lower end of the telescopic rod (13) is connected with the front end of the supporting seat (10), and the upper end of the telescopic rod (13) is connected with the front lower bottom surface of the gun barrel (27) of the spray.

8. The dust removing device for construction site according to claim 1, wherein: the sewage discharging door (5) at the lower part of the trolley (1) is hinged with the side wall of the trolley (1) through a sewage discharging door rotating shaft (6), a connecting block (7) is fixedly connected onto the sewage discharging door (5), a connecting bolt (8) is arranged on the connecting block (7), and the connecting block (7) is fixedly connected with the trolley (1) through the connecting bolt (8).

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