Dust falling device of wet spraying trolley

Abstract

The invention provides a wet spraying trolley dust falling device, and relates to the technical field of building construction equipment.The wet spraying trolley dust falling device comprises a base, a supporting frame and a rotating mechanism used for driving the supporting frame to rotate are arranged on the base, a dust falling cover and a driving assembly used for driving the dust falling cover to move in the length direction of the supporting frame are arranged on the supporting frame, and a connecting mechanism is arranged on the dust falling cover; a suction mechanism is arranged on the base; the connecting mechanism comprises a connecting pipe, a connecting plate and a connecting frame body, a notch is formed in the dust falling cover, the connecting frame body is slidably arranged in the notch in the length direction of the notch, and the connecting plate is slidably arranged in the connecting frame body in the width direction of the notch; the suction mechanism comprises an exhaust fan, a transfer box and a suction pipe, an air pipe of the exhaust fan is communicated with the top of the transfer box, and the suction pipe is arranged between the transfer box and the dust falling cover. According to the spraying device, dust falling treatment can be conveniently conducted on the sprayed position in the spraying process, and therefore the influence of dust on the environment and personnel health is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of building construction equipment, and in particular to a dust suppression device for a wet spraying trolley. Background Art

[0002] The wet concrete spraying trolley uses compressed air to spray the concrete material mixed with a certain water-cement ratio at a high speed through the conveying pipe and the nozzle of the sprayer, thereby forming a concrete support layer on the sprayed surface. It is the main equipment in the sprayed concrete construction operation. Since the concrete spraying technology has the characteristics of saving concrete, saving labor, improving construction efficiency, and reducing engineering costs, the wet spraying trolley is becoming more and more popular. It has been widely used in the construction of railways, highways, water conservancy and other construction projects, and has become an ideal construction machine for solving temporary and permanent water support of tunnels, road slope protection, building foundation pits, and underground projects.

[0003] At present, a large amount of dust is generated during the concrete spraying operation, causing environmental pollution and endangering personnel health. Since the nozzle of the wet spraying trolley is at a certain distance from the sprayed surface during the spraying operation, it is currently not convenient to carry out dust reduction treatment on the dust generated during the spraying process. Summary of the invention

[0004] The object of the present invention is to provide a dust reduction device for a wet spraying trolley, which can conveniently perform dust reduction treatment on the sprayed position during the spraying process, thereby avoiding the impact of dust on the environment and personnel health.

[0005] The present invention is implemented by the following technical scheme: a dust suppression device for a wet spraying trolley, comprising a base, a support frame and a rotating mechanism for driving the support frame to rotate are arranged on the base, a dust suppression cover and a driving assembly for driving the dust suppression cover to move along the length direction of the support frame are arranged on the support frame, a connecting mechanism for connecting with a nozzle of the wet spraying trolley is arranged on the dust suppression cover, and a suction mechanism for making the dust suppression cover in a negative pressure state is arranged on the base;

[0006] The connecting mechanism comprises a connecting pipe, a connecting plate and a connecting frame, a notch is provided on the dust cover, the connecting frame is slidably arranged in the notch along the length direction of the notch, the connecting plate is slidably arranged in the connecting frame along the width direction of the notch, the connecting pipe is tapered and one end of the connecting pipe passes through the connecting plate and extends into the dust cover, the area of ​​the end of the connecting pipe located in the dust cover is larger than the area of ​​the end of the connecting pipe located outside the dust cover, and a plurality of connecting bolts are circumferentially distributed on the end of the connecting pipe located outside the dust cover;

[0007] The suction mechanism includes an exhaust fan, a transfer box and a suction pipe. The transfer box is arranged on a base. The transfer box contains a dissolving liquid. The exhaust fan is arranged on one side of the transfer box and the air duct of the exhaust fan is connected to the top of the transfer box. One end of the suction pipe is connected to one side of the transfer box, and the other end is connected to the dust suppression hood.

[0008] Furthermore, a first conical bucket is provided at one end of the suction pipe connected to the dust suppression hood, a second conical bucket is provided at one end of the suction pipe located in the transfer box, a partition is provided in the transfer box, the partition divides the interior of the transfer box into a first chamber and a second chamber, and an opening and closing component for connecting or isolating the first chamber and the second chamber is provided at the bottom of the partition.

[0009] Furthermore, the opening and closing assembly includes an opening and closing electric cylinder and an opening and closing plate, the opening and closing plate is slidably arranged on one side of the partition along the vertical direction, the cylinder barrel of the opening and closing electric cylinder is fixedly arranged on the partition, and the piston rod of the opening and closing electric cylinder is fixedly connected to the top of the opening and closing plate.

[0010] Furthermore, the second conical bucket is located in the first chamber and the opening end of the second conical bucket faces the bottom wall of the first chamber, an isolation mesh is arranged below the second conical bucket, a counterweight frame is arranged at the bottom of the isolation mesh, and the counterweight frame is located below the liquid level of the first chamber.

[0011] Furthermore, accordion-type baffles are connected to the ends of the notches on both sides of the connection frame, and elastic films are connected between the connection frame and both sides of the connection plate.

[0012] Furthermore, a dust discharge port is provided on the dust suppression cover, a retaining mesh plate is provided in the dust discharge port, and a retaining bar is provided on the inner wall of the dust suppression cover on the side close to the first conical bucket, and the retaining bar extends obliquely upward.

[0013] Furthermore, drive seats are provided on both sides of the outside of the dust cover, a drive electric cylinder is provided on the drive seat, a drive block is provided on the piston rod of the drive electric cylinder, and the two drive blocks are respectively fixed on both sides of the dust cover; the drive assembly includes a drive motor, a lead screw and a guide rod, the length directions of the lead screw and the guide rod are consistent with the length direction of the support frame and are respectively located on both sides of the support frame, one of the drive seats is threadedly connected to the lead screw, and the other drive seat is slidably connected to the guide rod, the drive motor is fixedly arranged on the support frame and the output shaft of the drive motor is fixedly connected to the lead screw.

[0014] Further, the driving seat includes a first support and a second support rotatably connected to the first support, a torsion spring is connected between the first support and the second support, a positioning member is arranged on the first support, and the positioning member includes a support block, a clamping spring, a positioning block and a positioning rod, the support block is fixedly arranged on the first support, the positioning block is slidably arranged on one side of the support block, the clamping spring is connected between the support block and the positioning block, the positioning rod is arranged on the side of the positioning block away from the support block, a positioning seat is arranged on the second support, and a positioning hole for inserting the positioning rod is opened on the positioning seat.

[0015] Furthermore, both sides of the support frame are provided with a loosening piece for driving the positioning block to move away from the positioning seat, the loosening piece includes a sliding seat, the sliding seat is slidably set on the support frame along the length direction of the support frame, the side of the sliding seat located outside the support frame is provided with a tightening bolt for tightening on the support frame, the side of the sliding seat located inside the support frame is provided with a loosening rod, the bottom of the loosening rod is provided with a loosening block, and the end of the loosening block facing the positioning block is provided with an arc chamfer.

[0016] Furthermore, a flipping member for driving the dust cover to flip is arranged between the two sliding seats, and the flipping member includes an arc-shaped pressing rod and two rotating rods. The two rotating rods are respectively rotatably connected to the sides of the two sliding seats that are opposite to each other, and the arc-shaped pressing rod is detachably connected between the two rotating rods. A rotating member is arranged on one of the sliding seats, and the rotating member includes a rotating motor, a driving gear and a driven gear. The rotating motor is fixedly arranged on the sliding seat, and the driving gear is arranged on the output shaft of the rotating motor. The driven gear is coaxially connected to one of the rotating rods and meshes with the driving gear; a touch switch is arranged on the end of the loosening block away from the positioning block, and the rotating motor can be turned on when the positioning block abuts against the touch switch.

[0017] The technical solution of the present invention has at least the following advantages and beneficial effects:

[0018] 1. The present invention uses a dust suppression hood to isolate the outside of the spraying point, so that the dust generated during the spraying process will not float outward, thereby avoiding the impact of dust on the environment and personnel health; by arranging a suction mechanism to suck the dust suppression hood into a negative pressure state, the dust accumulated in the dust suppression hood enters the transfer box through the suction pipe and dissolves into the dissolving liquid, so as to reduce the dust content in the gas extracted by the exhaust fan in the transfer box.

[0019] 2. The present invention drives the driving seat through the driving assembly so that the dust suppression hood can move as a whole along the length direction of the support frame, so that after spraying one spray point is completed, the dust suppression hood can be moved as a whole to the next spray point for dust suppression operation; by arranging a driving electric cylinder and a driving block on the driving seat, the driving electric cylinder drives the driving block to move, that is, it can drive the dust suppression hood to move in the direction close to or away from the sprayed surface, so as to adjust the distance between the dust suppression hood and the sprayed surface.

[0020] 3. The present invention forms a driving seat through the first support and the second support, and fixes the relative positions of the first support and the second support through the positioning member and the positioning seat to ensure the stability of the driving seat during movement; the positioning member is driven to move out of the positioning seat through the loosening member, and the dust cover is pressed through the flipping member, so that after the inclined surface of the slope is sprayed, when it is necessary to spray the flat surface at the top of the slope, the inclination angle of the dust cover is changed to adapt to the change in the angle of the sprayed position. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0022] Figure 2 It is a schematic diagram of the structure of the support frame, dust suppression cover and suction mechanism of the present invention;

[0023] Figure 3 It is a structural schematic diagram of the suction mechanism of the present invention;

[0024] Figure 4 It is a schematic diagram of the structure of the suction pipe, dust suppression cover and support frame of the present invention;

[0025] Figure 5 It is a schematic diagram of the structure of the connecting mechanism, the driving seat, the loosening member, the turning member and the dust suppression cover of the present invention;

[0026] Figure 6 It is a schematic diagram of the structure of the connecting mechanism of the present invention in the dust suppression cover;

[0027] Figure 7 It is a schematic diagram of the structure of the driving seat, the loosening member and the turning member of the present invention;

[0028] Figure 8 It is a structural schematic diagram of the driving seat of the present invention;

[0029] Figure numerals: 1-base, 2-support frame, 21-rotating mechanism, 3-dust suppression cover, 31-notch, 32-dust exhaust port, 33-retention mesh plate, 34-retention strip, 4-driving assembly, 41-driving motor, 42-screw, 43-guide rod, 5-connecting mechanism, 51-connecting pipe, 52-connecting plate, 521-elastic film, 53-connecting frame, 531-accordion baffle, 54-connecting bolt, 6-suction mechanism, 61-exhaust fan, 62-transfer box, 621-partition, 622-first chamber, 623-second chamber, 624-opening and closing assembly, 6241-opening and closing electric cylinder, 6242-opening and closing plate, 63-suction pipe, 631-first cone Bucket, 632-second conical bucket, 633-isolation mesh, 634-counterweight frame, 7-driving seat, 701-first support, 702-second support, 703-torsion spring, 71-driving electric cylinder, 72-driving block, 73-positioning piece, 731-support block, 732-tightening spring, 733-positioning block, 734-positioning plug rod, 74-positioning seat, 8-loosening piece, 81-sliding seat, 82-tightening bolt, 83-loosening rod, 84-loosening block, 841-arc chamfer, 842-touch switch, 9-flipping piece, 91-arc pressing rod, 92-rotating rod, 93-rotating piece, 931-rotating motor, 932-driving gear, 933-driven gear. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0031] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. 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.

[0032] Example

[0033] The following reference Figure 1-Figure 8As shown, further described in combination with a specific embodiment, this embodiment provides a dust suppression device for a wet spraying trolley, including a base 1, a support frame 2 and a rotating mechanism 21 for driving the support frame 2 to rotate are arranged on the base 1, a dust suppression cover 3 and a driving assembly 4 for driving the dust suppression cover 3 to move along the length direction of the support frame 2 are arranged on the support frame 2, and a connecting mechanism 5 for connecting with the nozzle of the wet spraying trolley is arranged on the dust suppression cover 3. The base 1 is also provided with a suction mechanism 6 for making the dust suppression cover 3 in a negative pressure state. Before the wet spraying operation, the base 1 is moved to a designated position, and the angle of the support frame 2 is adjusted by the rotating mechanism 21, and the dust suppression cover 3 is moved to the position where the spraying operation is to be performed along the length direction of the support frame 2, and then the connecting mechanism 5 is connected to the nozzle of the wet spraying trolley, and the spraying unit of the concrete wet spraying trolley is started, that is, the wet spraying operation can be performed on the spraying point. During the operation, the dust suppression cover 3 is arranged outside the spraying point to play an isolation role, so that the dust generated during the spraying process will not float outward, thereby avoiding the dust from affecting the environment and personnel health. In this embodiment, the rotating mechanism 21 is a worm gear mechanism, which has the advantages of a large transmission ratio, smooth transmission and a compact structure, and has a self-locking function, and can keep the support frame at a specified angle after the adjustment is completed.

[0034] Reference Figure 2 , Figure 3 As shown, the suction mechanism 6 includes an exhaust fan 61, a transfer box 62 and a suction pipe 63. The transfer box 62 is installed on the base 1. The transfer box 62 contains a dissolving liquid. The exhaust fan 61 is installed on one side of the transfer box 62 and the air duct of the exhaust fan 61 is connected to the top of the transfer box 62. One end of the suction pipe 63 is connected to one side of the transfer box 62 and the other end is connected to the dust cover 3. The exhaust fan 61 is started to suck the air in the transfer box 62, so that the transfer box 62 is in a negative pressure state and the dust cover 3 is sucked into a negative pressure state through the suction pipe 63, so that the dust accumulated in the dust cover 3 enters the transfer box 62 through the suction pipe 63 and dissolves in the dissolving liquid. In this embodiment, salt water is selected as the dissolving liquid. In other embodiments, ethanol solution can also be selected as the dissolving liquid, which can improve the dissolving efficiency of dust.

[0035] Reference Figure 3 , Figure 4As shown, a first conical bucket 631 is provided at one end of the suction pipe 63 connected to the dust cover 3, a second conical bucket 632 is provided at one end of the suction pipe 63 located in the transfer box 62, a partition 621 is provided in the transfer box 62, the partition 621 divides the interior of the transfer box 62 into a first chamber 622 and a second chamber 623, and an opening and closing assembly 624 for connecting or separating the first chamber 622 and the second chamber 623 is provided at the bottom of the partition 621. The opening and closing assembly 624 includes an opening and closing electric cylinder 6241 and an opening and closing plate 6242, the opening and closing plate 6242 is slidably arranged on one side of the partition 621 in the vertical direction, the cylinder barrel of the opening and closing electric cylinder 6241 is fixedly arranged on the partition 621, and the piston rod of the opening and closing electric cylinder 6241 is fixedly connected to the top of the opening and closing plate 6242. When in use, the second chamber 623 is filled with the dissolving liquid, and then the opening and closing electric cylinder 6241 is opened to drive the opening and closing plate 6242 to move upward to connect the first chamber 622 with the second chamber 623, so that part of the dissolving liquid flows from the second chamber 623 into the first chamber 622, and then the opening and closing electric cylinder 6241 drives the opening and closing plate 6242 to move downward to separate the first chamber 622 from the second chamber 623, and the dust enters the dissolving liquid in the first chamber 622 through the second conical bucket 632. When there is a lot of dust dissolved in the dissolving liquid, the dissolving liquid in the first chamber 622 is discharged and the opening and closing plate 6242 is opened again to allow part of the dissolving liquid to flow from the second chamber 623 into the first chamber 622, so as to replace the dissolving liquid in the first chamber 622 and avoid reducing the dissolving effect of the dust.

[0036] Reference Figure 3 As shown, the second conical bucket 632 is located in the first chamber 622 and the opening end of the second conical bucket 632 faces the bottom wall of the first chamber 622. An isolation mesh 633 is provided below the second conical bucket 632. A counterweight frame 634 is provided at the bottom of the isolation mesh 633. The counterweight frame 634 is located below the liquid level of the first chamber 622. The isolation mesh 633 can block dust so that dust can only be in the space enclosed by the isolation mesh 633 and fall into the dissolving liquid for dissolution, and will not float to other areas in the transfer box 62, thereby preventing the exhaust fan 61 from directly extracting dust along with the air. The setting of the counterweight frame 634 can make the isolation mesh 633 in a downwardly stretched state under the action of tension, thereby preventing the isolation mesh 633 from being deformed under the action of negative pressure and affecting the use effect.

[0037] Reference Figure 5 , Figure 6As shown, the connecting mechanism 5 includes a connecting pipe 51, a connecting plate 52 and a connecting frame 53. A notch 31 is provided on the dust cover 3. The connecting frame 53 is slidably arranged in the notch 31 along the length direction of the notch 31. Both sides of the connecting frame 53 are connected to the ends of the notch 31 with accordion-type baffles 531; the connecting plate 52 is slidably arranged in the connecting frame 53 along the width direction of the notch 31. Both sides of the connecting plate 52 are connected to the connecting frame 53 with elastic films 521; the connecting pipe 51 is conical and one end of the connecting pipe 51 passes through the connecting plate 52 and extends into the dust cover 3. The area of ​​the connecting pipe 51 at one end inside the dust cover 3 is larger than the area of ​​the connecting pipe 51 at one end outside the dust cover 3. A plurality of connecting bolts 54 are circumferentially distributed on the end of the connecting pipe 51 outside the dust cover 3. The end of the connecting pipe 51 with the smallest diameter is connected to the nozzle by the connecting bolt 54. Since the diameter of the connecting pipe 51 gradually increases from the end outside the dust cover 3 to the end inside the dust cover 3, it can adapt to the divergent concrete beam during the spraying process. The connecting frame 53 can slide relative to the dust cover 3 along the length direction of the notch 31, and the connecting plate 52 can slide relative to the connecting frame 53 along the width direction of the notch 31. Therefore, the end of the connecting pipe 51 located inside the dust cover 3 can move inside the dust cover 3 to adapt to the change of the nozzle direction during the spraying process.

[0038] Reference Figure 6 As shown, a dust outlet 32 ​​is provided on the side of the dust cover 3 facing the base 1, and a retention mesh plate 33 is installed in the dust outlet 32 ​​to intercept large particles of impurities. A retention bar 34 is provided on the inner wall of the dust cover 3 close to the first conical bucket 631, and the retention bar 34 extends upward at an angle to temporarily store large particles of impurities during construction.

[0039] Reference Figure 4 , Figure 5As shown, a driving seat 7 is provided on both sides of the outside of the dust cover 3, a driving electric cylinder 71 is provided on the driving seat 7, a driving block 72 is provided on the piston rod of the driving electric cylinder 71, and two driving blocks 72 are respectively fixed on both sides of the dust cover 3; the driving assembly 4 includes a driving motor 41, a lead screw 42 and a guide rod 43, the length directions of the lead screw 42 and the guide rod 43 are consistent with the length direction of the support frame 2 and are respectively located on both sides of the support frame 2, one of the driving seats 7 is threadedly connected to the lead screw 42, and the other driving seat 7 is slidably connected to the guide rod 43, the driving motor 41 is fixedly arranged on the support frame 2, and the output shaft of the driving motor 41 is fixedly connected to the lead screw 42. The driving electric cylinder 71 drives the driving block 72 to move, that is, it can drive the dust cover 3 to move in the direction close to or away from the sprayed surface, so as to adjust the distance between the dust cover 3 and the sprayed surface. Start the drive motor 41 to drive the screw 42 to rotate. Under the limiting action of the guide rod 43, the drive seat 7 and the dust suppression cover 3 can move as a whole along the length direction of the support frame 2, so that after spraying one spray point is completed, the dust suppression cover 3 can be moved as a whole to the next spray point for dust reduction operation.

[0040] Reference Figure 7 , Figure 8 As shown, the driving seat 7 includes a first support 701 and a second support 702 rotatably connected to the first support 701, a torsion spring 703 is connected between the first support 701 and the second support 702, a positioning member 73 is arranged on the first support 701, the positioning member 73 includes a support block 731, a clamping spring 732, a positioning block 733 and a positioning rod 734, the support block 731 is fixedly arranged on the first support 701, the positioning block 733 is slidably arranged on one side of the support block 731, the clamping spring 732 is connected between the support block 731 and the positioning block 733, the positioning rod 734 is arranged on the side of the positioning block 733 away from the support block 731, and a positioning seat 74 is arranged on the second support 702, and a positioning hole for inserting the positioning rod 734 is opened on the positioning seat 74. When not affected by external force, the positioning block 733 drives the positioning rod 734 to be inserted into the positioning hole under the elastic force of the clamping spring 732, so as to fix the relative position of the first support 701 and the second support 702; after the inclined surface of the slope is sprayed, when the plane at the top of the slope needs to be sprayed, the angle of the dust cover 3 needs to be adjusted. At this time, the positioning rod 734 is moved out of the positioning hole, and the dust cover 3 is pressed, that is, the inclination angle of the dust cover 3 can be changed to adapt to the change of the angle of the sprayed position.

[0041] Reference Figure 4 , Figure 7As shown, both sides of the support frame 2 are provided with a release member 8 for driving the positioning block 733 to move away from the positioning seat 74. The release member 8 includes a sliding seat 81, which is slidably installed on the support frame 2 along the length direction of the support frame 2. The side of the sliding seat 81 located outside the support frame 2 is provided with a tightening bolt 82 for tightening on the support frame 2. By sliding the sliding seat 81 to a specified position and fixing the position after sliding by the tightening bolt 82, the release member 8 can be moved to a corresponding position, so as to separate the positioning block 733 from the positioning seat 74 at the specified position, and release the positioning effect between the first support 701 and the second support 702. A release rod 83 is provided on one side of the sliding seat 81 located inside the support frame 2, and a release block 84 is provided at the bottom of the release rod 83. An arc chamfer 841 is provided on the end of the release block 84 facing the positioning block 733. When the positioning block 733 moves to contact with the releasing block 84, the arc chamfer 841 on the releasing block 84 can abut against the positioning block 733 and drive the positioning block 733 to move away from the positioning seat 74, so that the positioning rod 734 moves out of the positioning hole, thereby allowing the first support 701 and the second support 702 to rotate relative to each other under the action of external force.

[0042] Reference Figure 5 , Figure 7 As shown, a flipping member 9 for driving the dust cover 3 to flip is arranged between the two sliding seats 81, and the flipping member 9 includes an arc-shaped pressing rod 91 and two rotating rods 92. The two rotating rods 92 are respectively rotatably connected to the opposite sides of the two sliding seats 81, and the arc-shaped pressing rod 91 is detachably connected between the two rotating rods 92. A rotating member 93 is arranged on one of the sliding seats 81, and the rotating member 93 includes a rotating motor 931, a driving gear 932 and a driven gear 933. The rotating motor 931 is fixedly arranged on the sliding seat 81, and the driving gear 932 is arranged on the output shaft of the rotating motor 931. The driven gear 933 is coaxially connected to one of the rotating rods 92 and meshes with the driving gear 932; a touch switch 842 is arranged on the end of the loosening block 84 away from the positioning block 733. When the positioning block 733 contacts the touch switch 842, the rotating motor 931 can be turned on, thereby driving the driving gear 932 to rotate. Under the meshing action of the driving gear 932, the driven gear 933 rotates synchronously to drive one of the rotating rods 92 to rotate, thereby causing the arc-shaped pressing rod 91 to press the dust cover 3, so that the dust cover 3 rotates downward to a specified angle to adapt to the plane at the top of the slope. By detachably connecting the arc-shaped pressing rod 91 between the two rotating rods 92, the dust cover 3 can be pressed to different inclination angles by replacing the arc-shaped pressing rods 91 with different curvatures.

[0043] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A wet spraying trolley dust suppression device, characterized in that: The invention comprises a base (1), wherein the base (1) is provided with a support frame (2) and a rotating mechanism (21) for driving the support frame (2) to rotate, the support frame (2) is provided with a dust cover (3) and a driving assembly (4) for driving the dust cover (3) to move along the length direction of the support frame (2), the dust cover (3) is provided with a connecting mechanism (5) for connecting with a nozzle of a wet spraying trolley, and the base (1) is provided with a suction mechanism (6) for making the dust cover (3) present a negative pressure state; The connection mechanism (5) comprises a connection pipe (51), a connection plate (52) and a connection frame (53); a notch (31) is provided on the dust cover (3); the connection frame (53) is slidably arranged in the notch (31) along the length direction of the notch (31); the connection plate (52) is slidably arranged in the connection frame (53) along the width direction of the notch (31); the connection pipe (51) is tapered and one end of the connection pipe (51) passes through the connection plate (52) and extends into the dust cover (3); the area of ​​the end of the connection pipe (51) located inside the dust cover (3) is larger than the area of ​​the end of the connection pipe (51) located outside the dust cover (3); and a plurality of connection bolts (54) are circumferentially distributed on the end of the connection pipe (51) located outside the dust cover (3); The suction mechanism (6) comprises an exhaust fan (61), a transfer box (62) and a suction pipe (63); the transfer box (62) is arranged on the base (1); the transfer box (62) contains a dissolving liquid; the exhaust fan (61) is arranged on one side of the transfer box (62) and the air duct of the exhaust fan (61) is connected to the top of the transfer box (62); one end of the suction pipe (63) is connected to one side of the transfer box (62) and the other end is connected to the dust suppression cover (3).

2. The dust suppression device for wet spraying trolley according to claim 1 is characterized in that: A first conical bucket (631) is provided at one end of the suction pipe (63) connected to the dust suppression hood (3), and a second conical bucket (632) is provided at one end of the suction pipe (63) located in the transfer box (62). A partition (621) is provided in the transfer box (62), and the partition (621) divides the interior of the transfer box (62) into a first chamber (622) and a second chamber (623). An opening and closing component (624) for connecting or isolating the first chamber (622) and the second chamber (623) is provided at the bottom of the partition (621).

3. The dust suppression device for wet spraying trolley according to claim 2 is characterized in that: The opening and closing assembly (624) comprises an opening and closing electric cylinder (6241) and an opening and closing plate (6242); the opening and closing plate (6242) is slidably arranged on one side of the partition (621) in the vertical direction; the cylinder barrel of the opening and closing electric cylinder (6241) is fixedly arranged on the partition (621); and the piston rod of the opening and closing electric cylinder (6241) is fixedly connected to the top of the opening and closing plate (6242).

4. The dust suppression device for wet spraying trolley according to claim 2, characterized in that: The second conical bucket (632) is located in the first chamber (622) and the opening end of the second conical bucket (632) faces the bottom wall of the first chamber (622). An isolation mesh (633) is arranged below the second conical bucket (632). A counterweight frame (634) is arranged at the bottom of the isolation mesh (633). The counterweight frame (634) is located below the liquid level of the first chamber (622).

5. The dust suppression device for wet spraying trolley according to claim 1, characterized in that: Both sides of the connection frame (53) are connected to the ends of the notch (31) with accordion-type baffles (531), and both sides of the connection plate (52) are connected to the connection frame (53) with elastic films (521).

6. The dust suppression device for wet spraying trolley according to claim 2, characterized in that: The dust removal cover (3) is provided with a dust discharge port (32), a retaining mesh plate (33) is arranged inside the dust removal port (32), and a retaining strip (34) is arranged on the inner wall of the dust removal cover (3) on the side close to the first conical bucket (631), and the retaining strip (34) extends obliquely upward.

7. The dust suppression device for wet spraying trolley according to claim 1, characterized in that: A driving seat (7) is provided on both sides of the outside of the dust cover (3), a driving electric cylinder (71) is provided on the driving seat (7), a driving block (72) is provided on the piston rod of the driving electric cylinder (71), and two driving blocks (72) are respectively fixed on both sides of the dust cover (3); the driving assembly (4) comprises a driving motor (41), a lead screw (42) and a guide rod (43), the length directions of the lead screw (42) and the guide rod (43) are consistent with the length direction of the support frame (2) and are respectively located on both sides of the support frame (2), one of the driving seats (7) is threadedly connected to the lead screw (42), and the other driving seat (7) is slidably connected to the guide rod (43), the driving motor (41) is fixedly arranged on the support frame (2), and the output shaft of the driving motor (41) is fixedly connected to the lead screw (42).

8. The dust suppression device for wet spraying trolley according to claim 7, characterized in that: The driving seat (7) comprises a first support (701) and a second support (702) rotatably connected to the first support (701); a torsion spring (703) is connected between the first support (701) and the second support (702); a positioning member (73) is provided on the first support (701); the positioning member (73) comprises a supporting block (731), a pressing spring (732), a positioning block (733) and a positioning plug rod (734); the supporting block (731) is fixed The first support (701) is provided with the positioning block (733) being slidably arranged on one side of the supporting block (731); the retaining spring (732) is connected between the supporting block (731) and the positioning block (733); the positioning rod (734) is arranged on the side of the positioning block (733) away from the supporting block (731); the second support (702) is provided with a positioning seat (74); and the positioning seat (74) is provided with a positioning hole for inserting the positioning rod (734).

9. The dust suppression device for wet spraying trolley according to claim 8, characterized in that: Both sides of the support frame (2) are provided with a loosening member (8) for driving the positioning block (733) to move in a direction away from the positioning seat (74); the loosening member (8) comprises a sliding seat (81); the sliding seat (81) is slidably arranged on the support frame (2) along the length direction of the support frame (2); a tightening bolt (82) for tightening against the support frame (2) is arranged on the side of the sliding seat (81) located outside the support frame (2); a loosening rod (83) is arranged on the side of the sliding seat (81) located inside the support frame (2); a loosening block (84) is arranged at the bottom of the loosening rod (83); and an arc chamfer (841) is arranged on one end of the loosening block (84) facing the positioning block (733).

10. The dust suppression device for wet spraying trolley according to claim 9, characterized in that: A flipping member (9) for driving the dust suppression cover (3) to flip is arranged between the two sliding seats (81), the flipping member (9) comprising an arc-shaped pressing rod (91) and two rotating rods (92), the two rotating rods (92) being respectively rotatably connected to the mutually opposite sides of the two sliding seats (81), the arc-shaped pressing rod (91) being detachably connected between the two rotating rods (92), a rotating member (93) being arranged on one of the sliding seats (81), the rotating member (93) comprising a rotating motor (931), a driving gear (932) and a driven gear (933), the rotating motor (931) being fixedly arranged on the sliding seat (81), the driving gear (932) being arranged on the output shaft of the rotating motor (931), the driven gear (933) being coaxially connected to one of the rotating rods (92) and meshing with the driving gear (932); A touch switch (842) is provided at one end of the release block (84) away from the positioning block (733), and the rotating motor (931) can be turned on when the positioning block (733) abuts against the touch switch (842).

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