Conveying device for mineral exploitation

Abstract

The invention discloses a conveying device for mineral exploitation, and relates to the technical field of ore conveying. The conveying device comprises a U-shaped belt conveying line used for conveying ore, and the two ends of the U-shaped belt conveying line are arranged at an ore mining point and an ore collecting point correspondingly. A plurality of atomizing water spraying and humidifying mechanisms are arranged above the U-shaped belt conveying line, and water spraying and humidifying are carried out on the surface of ore conveyed on a belt through the atomizing water spraying and humidifying mechanisms during use, so that dust raising is inhibited; and meanwhile, a plurality of atomizing water-spraying humidifying mechanisms are arranged, so that flying dust is prevented from being generated again after moisture on the surface layers of the ores is dried along with long-distance conveying.

Description

Technical Field

[0001] The invention belongs to the technical field of ore transportation, and in particular relates to a transportation device used in mineral mining. Background Art

[0002] Ore conveyor belt mainly refers to the transmission equipment used in the mining, production, transportation and processing of coal and other ores. The coal mine conveyor belt has the characteristics of large transportation volume, strong carrying capacity and long transportation distance. It is often used to transport coal after excavation, thereby reducing the cost of manual transportation and improving transportation efficiency.

[0003] When the ore is transported after mining, the powder of the surface ore will float into the air to form dust due to vibration. When this dust floats in the air and is absorbed by the human body, it will have an impact on human health. In addition, a large amount of ore dust enters the air, and the loss of ore increases. Summary of the invention

[0004] The object of the present invention is to provide a conveying device used in mineral mining. By arranging a plurality of atomizing water spraying and humidifying mechanisms above a U-shaped belt conveyor line, the device sprays water and humidifies the surface of the ore conveyed on the belt through the atomizing water spraying and humidifying mechanisms during use, thereby suppressing the generation of dust. At the same time, a plurality of atomizing water spraying and humidifying mechanisms are arranged to avoid the generation of dust again after the moisture on the surface of the ore is dried up due to long-distance transportation, thereby solving the problems raised by the existing background technology.

[0005] In order to solve the above technical problems, the present invention is achieved through the following technical solutions:

[0006] The present invention is a conveying device used in mineral mining, comprising a U-shaped belt conveyor line with two ends respectively arranged at a mining point and an ore collection point; N atomizing water spraying and humidifying mechanisms are installed at equal intervals on the upper frame of the U-shaped belt conveyor line along the conveying direction of the U-shaped belt conveyor line; M dry dust cleaning mechanisms are installed at equal intervals on the lower frame of the U-shaped belt conveyor line in the direction away from the ore collection point, and a wet dust cleaning mechanism is installed on the lower frame of the U-shaped belt conveyor line; the dry dust cleaning mechanism comprises a box body with an open top, and the inner bottom side surface of the box body is connected to a cleaning scraper through a telescopic module B; a plurality of dust suction pipes are arranged on the inner wall of the box body on both sides of the cleaning scraper at the position of the cleaning brush, and the dust suction pipes are connected to the dust extraction device; the wet dust cleaning mechanism comprises a U-shaped frame B with two ends installed below the frame of the U-shaped belt conveyor line, and a cleaning brush roller is connected between the two opposite inner side walls of the U-shaped frame B.

[0007] Furthermore, the atomizing water spray humidification mechanism includes a spray pipe arranged above the U-shaped belt conveyor line, the length direction of the spray pipe is perpendicular to the conveying direction of the U-shaped belt conveyor line; and a spray hole is provided on the spray pipe.

[0008] Furthermore, the dry cleaning mechanism also includes a U-shaped frame A with at least one end installed below the U-shaped belt conveyor line frame, the inner bottom side of the U-shaped frame A is connected to the bottom side of the box body through a telescopic module A, and soft bristles are arranged at the port of the box body; a cleaning brush composed of hard bristles is arranged on the top of the cleaning scraper.

[0009] Furthermore, a collecting tank with an opening at the top is provided directly below the U-shaped frame B;

[0010] A crossbeam is fixed between the two inner walls of the U-shaped frame B located on one side of the cleaning brush roller, a linear module is fixed on one side of the crossbeam, and one side of the slider of the linear module is connected to a brush roller cleaning module through at least one telescopic module C, and the brush roller cleaning module includes a rod body, and a plurality of comb teeth are arranged at equal gaps on one side of the rod body. A scraper plate is connected between the two opposite side walls of the U-shaped frame B, and the scraper plate is located directly below the comb teeth; when the telescopic module C is controlled to extend and retract, the scraper plate contacts the bottom side of the brush roller cleaning module.

[0011] Furthermore, a number of dust detectors A are arranged at equal intervals above the frame along the conveying direction of the U-shaped belt conveyor line.

[0012] Furthermore, at least one dust detector A is arranged between two adjacent atomizing water spraying and humidifying mechanisms; and a controller is also included, and the controller is connected to the dust detector A, the atomizing water spraying and humidifying mechanism, the dry cleaning mechanism and the wet cleaning mechanism.

[0013] Furthermore, a plurality of drying state detection mechanisms are arranged at equal intervals above the frame of the U-shaped belt conveyor line along the conveying direction of the U-shaped belt conveyor line; the drying state detection mechanism comprises a U-shaped frame C installed below the frame of the U-shaped belt conveyor line, a telescopic module D is connected to the inner bottom side of the U-shaped frame C, the top of the telescopic module D is connected to a base plate, and an infrared humidity detector and an infrared distance sensor facing the U-shaped belt conveyor line are arranged on the upper surface of the base plate.

[0014] Furthermore, it also includes a transparent dust cover arranged on the upper surface of the substrate for covering the infrared humidity detector and the infrared distance sensor; the infrared humidity detector and the infrared distance sensor are also provided with a water spray pipe and an air jet pipe facing the top surface of the transparent dust cover; the water spray pipe is connected to the bottom side of a water tank, and the top of the water tank is connected to a tube body, the inner wall of the tube body is provided with a convex ring, the upper surface of the convex ring is connected to a piston that slides along the inner wall of the tube body through a spring A, the top of the piston is connected to a piston rod, and the water tank is installed on the inner bottom side of the U-shaped frame C; a vertical rod is fixed to the inner bottom side of the U-shaped frame C, the top of the vertical rod is provided with a cross rod located above the substrate, the bottom side of the cross rod is fixed with an inner sleeve and an outer sleeve that seal each other, and a spring B is connected between the inner sleeve and the outer sleeve, and the air jet pipe is connected to the bottom side of the inner sleeve.

[0015] Furthermore, when the telescopic module D is in a normal state, the distance between the upper surface of the base plate and the bottom end of the outer sleeve is L1, and the distance between the lower surface of the base plate and the top end surface of the piston rod is L2.

[0016] Furthermore, when the telescopic module D is controlled to be extended to be fully extended, the gas stored in the inner sleeve and the outer sleeve is controlled to form an airflow and blown out to the top surface of the transparent dust cover through the jet pipe; when the telescopic module D is controlled to be retracted to be fully retracted, the water stored in the water tank is controlled to form a water flow and sprayed out to the top surface of the transparent dust cover through the water spray pipe.

[0017] The present invention has the following beneficial effects:

[0018] The present invention arranges a plurality of atomizing water spraying and humidifying mechanisms above the U-shaped belt conveyor line. When in use, the atomizing water spraying and humidifying mechanisms spray water to the surface of the ore conveyed on the belt to humidify it, thereby suppressing the generation of dust. At the same time, a plurality of atomizing water spraying and humidifying mechanisms are arranged to avoid the generation of dust again after the moisture on the surface of the ore is dried up due to long-distance transportation.

[0019] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0021] Figure 1 It is a schematic diagram of the structure of the conveying device of the present invention;

[0022] Figure 2 This is a schematic diagram of the structure of the dry dust cleaning mechanism of the present invention;

[0023] Figure 3 This is a schematic diagram of the wet dust cleaning mechanism structure of the present invention;

[0024] Figure 4 This is a schematic diagram of the structure of the drying state detection mechanism of the present invention;

[0025] Figure 5 It is a partial structural schematic diagram of the water storage tank of the present invention. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] In the description of the present invention, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inside", "all around" and the like indicating orientation or positional relationship are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0028] See also Figure 1 As shown, the present invention is a conveying device used in mineral mining, including a U-shaped belt conveyor line 100 for conveying ore, wherein the two ends of the U-shaped belt conveyor line 100 are respectively arranged at a mining point and an ore collection point, and in order to prevent dust on the surface of the ore from escaping into the air during the conveying process, the present invention installs N atomizing water spraying and humidifying mechanisms 1 at equal intervals along the conveying direction of the U-shaped belt conveyor line 100 on the upper frame of the U-shaped belt conveyor line 100, and when in use, the atomizing water spraying and humidifying mechanisms 1 spray water on the surface of the ore conveyed on the belt to humidify it, thereby suppressing the generation of dust; at the same time, N atomizing water spraying and humidifying mechanisms 1 are arranged to avoid the re-generation of dust after the moisture on the surface of the ore is dried due to long-distance transportation.

[0029] Specifically, the atomizing water spray humidifying mechanism 1 includes a spray pipe arranged above the U-shaped belt conveyor line 100, the length direction of the spray pipe is perpendicular to the conveying direction of the U-shaped belt conveyor line 100; and a spray hole is provided on the spray pipe.

[0030] It can be known that, in order to facilitate the changes in actual ambient temperature, humidity and the humidity of the ore itself during use, the dust generation and water consumption are reduced as much as possible during use. The present invention arranges a number of dust detectors A101 at equal gaps above the frame along the conveying direction of the U-shaped belt conveyor line 100; and two dust detectors A101 are arranged between two adjacent atomizing water spraying humidifying mechanisms 1; then, when in use, when any dust detector A101 detects that dust occurs in the ore at that position, then at this time, an atomizing water spraying humidifying mechanism 1 closest to the dust detector A101 and located in front of the dust detector A101 is controlled to start spraying water, and when the atomizing water spraying humidifying mechanism 1 is originally in a water spraying state, the atomizing water spraying humidifying mechanism 1 is controlled to increase the amount of water sprayed.

[0031] At the same time, when in use, with the long-term use of the U-shaped belt conveyor line 100, the ore dust is easily adhered to the U-shaped belt conveyor line 100 under the action of atomized water spray. At this time, when the belt is located below the frame, the wet or even paste-like dust is easily uncontrollably detached from the belt during transportation, thereby causing pollution. Based on this, the present invention needs to clean the ore dust attached to the belt; that is, the present invention installs M dry cleaning mechanisms 2 at equal intervals on the frame below the U-shaped belt conveyor line 100 in the direction away from the ore collection point, and a wet cleaning mechanism 3 is installed on the frame below the U-shaped belt conveyor line 100.

[0032] like Figure 3The wet dust cleaning mechanism 3 includes a U-shaped frame B30 with both ends installed under the frame of the U-shaped belt conveyor line 100, a cleaning brush roller 31 is connected between the two opposite inner walls of the U-shaped frame B30, and a collecting trough with a top opening is arranged directly below the U-shaped frame B30; a crossbeam 33 is fixed between the two opposite inner walls of the U-shaped frame B30 on one side of the cleaning brush roller 31, a linear module 32 is fixed on one side of the crossbeam 33, and a brush roller cleaning module is connected to one side of the slider of the linear module 32 through at least one telescopic module C34, and the brush roller cleaning module includes a rod body 35, and a plurality of comb teeth 36 are arranged at equal intervals on one side of the rod body 35; a scraper plate 37 is connected between the two opposite side walls of the U-shaped frame B30, and the scraper plate 37 is located at the comb tooth 36; when the telescopic module C34 is controlled to be telescopic, the scraper plate 37 is in contact with the bottom side of the brush roller cleaning module; that is, when in use, the cleaning brush roller 31 is used to clean the moist ore dust adhering to the belt, and after cleaning, the comb teeth 36 are used to clean the moist ore dust adhering to the cleaning brush roller 31; in order to enhance the cleaning effect, when in use, the slider of the linear module 32 is controlled to move along the length direction of the rod body 35 to drive the rod body 35 to move, thereby changing the position of any comb tooth 36 relative to the bristles of the cleaning brush roller 31; and when in use, the telescopic module C34 is used to drive the rod body 35 to move in the horizontal direction, and then the scraper plate 37 is used to remove the moist ore dust adhering to the comb teeth 36.

[0033] Specifically, Figure 2 The dry dust cleaning mechanism 2 includes a U-shaped frame A20 with both ends installed under the frame of the U-shaped belt conveyor line 100. The inner bottom side of the U-shaped frame A20 is connected to the bottom side of the box body 22 through a telescopic module A21. The inner bottom side of the box body 22 is connected to a cleaning scraper 25 through a telescopic module B24. Soft bristles 23 are arranged at the port of the box body 22; a cleaning brush 26 composed of hard bristles is arranged on the top of the cleaning scraper 25, and a plurality of dust suction pipes 27 are arranged on the inner wall of the box body 22 on both sides of the cleaning scraper 25, which are directly opposite to the cleaning brush 26. The dust suction pipe 27 is connected to the dust extraction device, and then the cleaning brush 26 is used to clean the dust adhering to the belt during use, and then the dust is sucked away by the dust suction pipe 27 to avoid direct dissipation and polluting the environment.

[0034] It can be known that, in order to facilitate control, a controller is also included, and the controller is connected to the dust detector A101, the atomizing water spray humidification mechanism 1, the dry cleaning mechanism 2 and the wet cleaning mechanism 3.

[0035] It can be known that, in order to facilitate the control and start-up of the corresponding dry cleaning mechanism 2 during use, a dry cleaning mechanism 2 is arranged between any two adjacent dry cleaning mechanisms 2. When the dry state detection mechanism 5 detects that the area meets the requirements for cleaning by the dry cleaning mechanism 2, a dry cleaning mechanism 2 in front of the dry cleaning mechanism 2 is started for cleaning.

[0036] Specifically, Figure 4 , a plurality of drying state detection mechanisms 5 are arranged at equal intervals above the frame of the U-shaped belt conveyor line 100 along the conveying direction thereof; the drying state detection mechanism 5 comprises a U-shaped frame C50 installed below the frame of the U-shaped belt conveyor line 100, a telescopic module D51 is connected to the inner bottom side of the U-shaped frame C50, the top of the telescopic module D51 is connected to a base plate 52, an infrared humidity detector and an infrared distance sensor facing the U-shaped belt conveyor line 100 are arranged on the upper surface of the base plate 52, the infrared humidity detector is used to facilitate the detection of the dust humidity adhering to the belt, and the infrared distance sensor is used to facilitate the automatic adjustment of the distance between the infrared humidity detector and the belt according to the actual situation.

[0037] Avoid long-term use of dust and other particles adhering to the infrared humidity detector and infrared distance sensor, which may affect the detection accuracy and service life of the two. Figure 4-5 The present invention has a transparent dust cover 55 on the upper surface of the substrate 52 for covering the infrared humidity detector and the infrared distance sensor; the infrared humidity detector and the infrared distance sensor are also provided with a water spray pipe 56 and an air jet pipe 57 facing the top surface of the transparent dust cover 55; the water spray pipe 56 is connected to the bottom side of a water storage tank 560, and the top of the water storage tank 560 is connected to a tube body 561, the inner wall of the tube body 561 is provided with a convex ring 562, the upper surface of the convex ring 562 is connected to a piston 564 that slides along the inner wall of the tube body 561 through a spring A563, and the top of the piston 564 is connected to a piston rod 565, and the water storage tank 560 is installed on the U The inner bottom side of the U-shaped frame C50; a vertical rod 58 is fixed to the inner bottom side of the U-shaped frame C50, and a horizontal rod 581 located above the base plate 52 is arranged on the top of the vertical rod 58, and an inner sleeve 591 and an outer sleeve 590 that are sealed with each other are fixed to the bottom side of the horizontal rod 581, and a spring B is connected between the inner sleeve 591 and the outer sleeve 590, and the jet pipe 57 is connected to the bottom side of the inner sleeve 591; and an opening with a diameter of 0.2 cm is arranged on the top of the water tank 560, and the setting of the opening keeps the ambient gas in the natural state to slowly enter the water tank 560, so as to keep the air pressure inside the water tank 560 equivalent to the ambient pressure.

[0038] When the telescopic module D51 is in a normal state, the upper surface of the substrate 52 is at a distance L1 from the bottom end of the outer sleeve 590, and the lower surface of the substrate 52 is at a distance L2 from the top end of the piston rod 565; when the telescopic module D51 is controlled to be retracted to the process of being fully retracted, the water stored in the water tank 560 is controlled to form a water flow and is sprayed through the water spray pipe 56 to the top end surface of the transparent dust cover 55, and the water flow is used to clean the top end surface of the transparent dust cover 55; when the telescopic module D51 is controlled to be extended to the process of being fully extended, the gas stored in the inner sleeve 591 and the outer sleeve 590 is controlled to form an air flow and is blown out through the jet pipe 57 to the top end surface of the transparent dust cover 55, and the water containing the residues on the top end surface of the transparent dust cover 55 is blown away by the blown air flow, thereby improving the cleaning effect.

[0039] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0040] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A conveying device for mineral mining, characterized in that: It comprises a U-shaped belt conveyor line (100) with two ends respectively arranged at a mining point and an ore collection point; N atomizing water spraying and humidifying mechanisms (1) are installed at equal intervals on the upper frame of the U-shaped belt conveyor line (100) along the conveying direction of the U-shaped belt conveyor line (100); M dry dust cleaning mechanisms (2) are installed at equal intervals on a frame below the U-shaped belt conveyor line (100) in a direction away from the ore collection point, and a wet dust cleaning mechanism (3) is installed on a frame below the U-shaped belt conveyor line (100); The dry dust cleaning mechanism (2) comprises a box body (22) with an opening at the top, the inner bottom side surface of the box body (22) being connected to a cleaning scraper (25) via a telescopic module B (24); a plurality of dust suction pipes (27) are arranged on the inner wall of the box body (22) on both sides of the cleaning scraper (25) at positions facing the cleaning brush (26), and the dust suction pipes (27) are connected to the dust extraction device; The wet dust cleaning mechanism (3) comprises a U-shaped frame B (30) with both ends installed below the frame of the U-shaped belt conveyor line (100), and a cleaning brush roller (31) is connected between two opposite inner side walls of the U-shaped frame B (30).

2. A conveying device for mineral mining according to claim 1, characterized in that: The atomizing water spraying humidifying mechanism (1) comprises a spray pipe arranged above the U-shaped belt conveyor line (100), the length direction of the spray pipe being perpendicular to the conveying direction of the U-shaped belt conveyor line (100); and spray holes being provided on the spray pipe.

3. A conveying device for mineral mining according to claim 1, characterized in that: The dry dust cleaning mechanism (2) further comprises a U-shaped frame A (20) with at least one end mounted below the frame of the U-shaped belt conveyor line (100); the inner bottom side surface of the U-shaped frame A (20) is connected to the bottom side surface of the box body (22) via a telescopic module A (21); and soft bristles (23) are arranged at the port of the box body (22); and a cleaning brush (26) composed of hard bristles is arranged at the top of the cleaning scraper (25).

4. A conveying device for mineral mining according to claim 1, characterized in that: A collecting tank with an open top is provided directly below the U-shaped frame B (30); A crossbeam (33) is fixed between two inner side walls of the U-shaped frame B (30) located on one side of the cleaning brush roller (31); a linear module (32) is fixed on one side of the crossbeam (33); a slider on one side of the linear module (32) is connected to a brush roller cleaning module via at least one telescopic module C (34); the brush roller cleaning module comprises a rod body (35); a plurality of comb teeth (36) are provided at equal intervals on one side of the rod body (35); A scraper plate (37) is connected between two opposite side walls of the U-shaped frame B (30), and the scraper plate (37) is located directly below the comb teeth (36); When the telescopic module C (34) is controlled to telescope, the scraper plate (37) contacts the bottom side of the brush roller cleaning module.

5. A conveying device for mineral mining according to any one of claims 1 to 4, characterized in that: A plurality of dust detectors A (101) are arranged at equal intervals above the frame of the U-shaped belt conveyor line (100) along the conveying direction of the U-shaped belt conveyor line (100).

6. A conveying device for mineral mining according to claim 5, characterized in that: At least one dust detector A (101) is arranged between two adjacent atomizing water spraying and humidifying mechanisms (1); It also includes a controller, which is connected to the dust detector A (101), the atomizing water spraying humidification mechanism (1), the dry dust cleaning mechanism (2) and the wet dust cleaning mechanism (3).

7. A conveying device for mineral mining according to claim 6, characterized in that: A plurality of drying state detection mechanisms (5) are arranged at equal intervals above the frame of the U-shaped belt conveyor line (100) along the conveying direction of the U-shaped belt conveyor line (100); The drying state detection mechanism (5) comprises a U-shaped frame C (50) installed below a frame of a U-shaped belt conveyor line (100); a telescopic module D (51) is connected to the inner bottom side of the U-shaped frame C (50); the top of the telescopic module D (51) is connected to a base plate (52); and an infrared humidity detector and an infrared distance sensor facing the U-shaped belt conveyor line (100) are arranged on the upper surface of the base plate (52).

8. A conveying device for mineral mining according to claim 7, characterized in that: It also includes a transparent dust cover (55) disposed on the upper surface of the substrate (52) and used to cover the infrared humidity detector and the infrared distance sensor; The infrared humidity detector and the infrared distance sensor are also provided with a water spray pipe (56) and an air spray pipe (57) facing the top end surface of the transparent dust cover (55); The water spray pipe (56) is connected to the bottom side of a water storage tank (560), and the top of the water storage tank (560) is connected to a tube body (561), the inner wall of the tube body (561) is provided with a convex ring (562), the upper surface of the convex ring (562) is connected to a piston (564) that slides along the inner wall of the tube body (561) in a sealing manner through a spring A (563), the top of the piston (564) is connected to a piston rod (565), and the water storage tank (560) is installed on the inner bottom side of the U-shaped frame C (50); A vertical rod (58) is fixed to the inner bottom side of the U-shaped frame C (50); a horizontal rod (581) located above the base plate (52) is arranged on the top of the vertical rod (58); an inner sleeve (591) and an outer sleeve (590) that are sealed and matched with each other are fixed to the bottom side of the horizontal rod (581); a spring B is connected between the inner sleeve (591) and the outer sleeve (590); and the jet pipe (57) is connected to the bottom side of the inner sleeve (591).

9. A conveying device for mineral mining according to claim 8, characterized in that: When the telescopic module D (51) is in a normal state, the distance between the upper surface of the base plate (52) and the bottom end of the outer sleeve (590) is L1, and the distance between the lower surface of the base plate (52) and the top end surface of the piston rod (565) is L2.

10. A conveying device for mineral mining according to claim 9, characterized in that: When the telescopic module D (51) is controlled to be extended to be fully extended, the gas stored in the inner sleeve (591) and the outer sleeve (590) is controlled to form an airflow which is blown out to the top surface of the transparent dust cover (55) through the air injection pipe (57); When the telescopic module D (51) is controlled to be retracted to the fully retracted state, the water stored in the water storage tank (560) is controlled to form a water flow and sprayed out to the top surface of the transparent dust cover (55) through the water spray pipe (56).

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