Rear-unloading type semi-hanging part spraying equipment

Abstract

The invention relates to the technical field of rear-unloading type semi-hanging spraying, in particular to rear-unloading type semi-hanging part spraying equipment which comprises a spraying room, a hoisting mechanism and the like. And a hoisting mechanism is arranged in the spraying room. According to the device, the two U-shaped suction pipes are arranged at the outlets of the spraying room correspondingly, negative pressure is generated in the two U-shaped suction pipes, and therefore molding powder drifting at the outlets in the two ends of the spraying room is sucked through all suction nozzles on the two U-shaped suction pipes, and the phenomenon that the molding powder drifts out of the spraying room is reduced; the spraying room is simple in structure and convenient to operate, the pollution of the molding powder to the on-site production environment is reduced, meanwhile, the harm to the bodies of on-site workers is reduced, the molding powder is collected through a filtering assembly on a U-shaped suction pipe, the waste of the molding powder is reduced, the production cost is reduced, and through the mode that the two suction pipes conduct suction at outlets in the two ends of the spraying room, the production efficiency is improved. And airflow in the spraying room is more stable, and the spraying effect is prevented from being affected.

Description

Technical Field

[0001] The present invention relates to the technical field of rear-dumping semi-trailer spraying, and particularly to a spraying device for rear-dumping semi-trailer parts. Background Art

[0002] Based on the analysis of the existing technology, it is found that the following problems exist in the process of plastic powder spraying the carriage in a traditional spraying booth: a large number of floating plastic powder particles will be generated in the spraying booth, and these particles are easy to settle and reattach to the surface of the carriage that has been sprayed, especially when the carriage still needs to stay in the spraying booth after spraying is completed, resulting in excessive plastic powder adhesion in local areas, thus making the thickness of the carriage coating uneven;

[0003] In addition, the plastic powder generated during the spraying process cannot be recycled in a timely and effective manner, which not only causes waste of plastic powder, increases production costs, but also may have an adverse impact on the on-site environment and the health of workers due to some plastic powder escaping from the spraying booth. Summary of the Invention

[0004] In order to overcome the defect that the plastic powder floating in the spraying booth reattaches to the surface of the carriage, resulting in uneven thickness of the carriage coating in local areas due to multiple adsorption of plastic powder, the present invention provides a spraying device for rear-dumping semi-trailer parts.

[0005] The technical solution is as follows: a spraying device for rear-dumping semi-trailer parts, including a spraying booth and a hoisting mechanism; a hoisting mechanism is arranged in the spraying booth, and the hoisting mechanism penetrates through the spraying booth; it also includes an electric slide rail, an electric slider, a mask plate, a connecting frame, a U-shaped suction pipe, a suction nozzle and a filtering component; at least two electric slide rails are installed on the spraying booth; at least two electric sliders are slidably connected to each electric slide rail; at least two mask plates are fixedly connected to the outside of each electric slide rail; all mask plates are fixedly connected to the spraying booth; a connecting frame is fixedly connected to each electric slider; a U-shaped suction pipe is fixedly connected to the connecting frames on the same side; a number of suction nozzles are connected to each U-shaped suction pipe, and the air inlets of all suction nozzles face the inside of the spraying booth; a filtering component is connected to each U-shaped suction pipe, and the filtering component is used to filter the plastic powder in the spraying booth.

[0006] Preferably, all suction nozzles are arranged in a horn shape, and an anti-sticking coating is provided inside the U-shaped suction pipe and the suction nozzle.

[0007] Preferably, a filtration system is further included; a filtration system is connected to each U-shaped suction pipe; each filtration system consists of a branch pipe, an electric actuator, a fixed rod, a rotating block and a filter screen; a branch pipe is fixedly connected and communicated with the U-shaped suction pipe; a collection component is connected to the branch pipe, and the collection component is used for collecting plastic powder; an electric actuator is fixedly connected to the branch pipe, and the electric actuator is an electric push rod; the telescopic part of the electric actuator is rotatably connected with a fixed rod; a rotating block is fixedly connected to one end of the fixed rod away from the electric actuator; a filter screen is fixedly connected to the branch pipe, and the filter screen consists of two rings and filter cloth, and the filter screen is made of cloth material; the filter screen is rotatably connected with the rotating block.

[0008] Preferably, an air flow sensor is arranged at one end of the branch pipe far from the U-shaped suction pipe.

[0009] Preferably, the filter screen is arranged in a conical cylinder shape.

[0010] Preferably, the collection component includes a fixed frame, a collection barrel, a conduit and a solenoid valve; a fixed frame is fixedly connected to the branch pipe; a collection barrel is fixedly connected to the fixed frame; a conduit is fixedly connected and communicated with the collection barrel; a solenoid valve is installed on the conduit.

[0011] Preferably, a cross bar, a driving part, a fixed block, a connecting shaft, a connecting block and a cleaning rod are further included; at least two cross bars are fixedly connected to one end of the rotating block away from the fixed rod; a driving part is installed on the fixed rod, and the driving part is used for driving the fixed rod to rotate; a fixed block is fixedly connected to the branch pipe; a connecting shaft is rotatably connected to the fixed block; a connecting block is fixedly connected to the connecting shaft; at least two cleaning rods are fixedly connected to the connecting block, and all the connecting blocks are combined into a figure-eight shape.

[0012] Preferably, the driving part is an impeller.

[0013] Preferably, anti-adhesive coatings are arranged on the outer surfaces of the fixed block, the connecting shaft and the connecting block.

[0014] Preferably, brush hairs are arranged on one side of the cleaning rod close to the filter screen.

[0015] The advantages and positive effects of the present invention are:

[0016] (1). By respectively arranging two U-shaped suction pipes at the outlets of the spraying booth, and then generating negative pressure in both U-shaped suction pipes, all the nozzles on the two U-shaped suction pipes are used to suck the plastic powder floating at the outlets at both ends of the spraying booth, thereby reducing the phenomenon of plastic powder floating out of the spraying booth, reducing the pollution of the plastic powder to the on-site production environment, and at the same time reducing the harm to the bodies of on-site workers. And the plastic powder is collected through the filtration component on the U-shaped suction pipe, reducing the waste of plastic powder while reducing the production cost. Moreover, by the way of sucking at the outlets at both ends of the spraying booth by the two U-shaped suction pipes, the air flow inside the spraying booth is made more stable, avoiding affecting the spraying effect.

[0017] (2) By moving two U-shaped suction pipes towards each other, the plastic powder floating in the entire spraying booth is sucked, and the sucked plastic powder is collected through the filter components on the U-shaped suction pipes, thereby reducing the possibility of the floating plastic powder adhering to the carriage surface again, improving the uniformity of the coating thickness of the carriage, and through the setting of the mask plate, reducing the plastic powder adhering to the electric slide rail and the electric slider, thereby ensuring the normal operation of the electric slide rail and the electric slider.

[0018] (3) The plastic powder is filtered through the filter screen in the branch pipe, and since the filter screen is set in a conical cylinder shape, the plastic powder can stay inside the filter screen, and thus the plastic powder is collected through the filter screen.

[0019] (4) The movement of the fixed rod drives the movement of the rotating block, and the movement of the rotating block drives the movement of the filter screen, so that the filter screen turns outwards, changing the shape of the filter screen, causing the plastic powder accumulated inside the filter screen to fall, and the plastic powder is collected through the collection bucket.

[0020] (5) The two cross bars rotate and touch the connecting block, driving the connecting block to rotate, and then the rotation of the connecting block drives the rotation of the two cleaning rods. Since the two cleaning rods are set in a figure-eight shape, the two cleaning rods can rotate along the surface of the filter screen after turning outwards, further cleaning the filter screen through the rotation of the two cleaning rods, causing the plastic powder on the filter screen to fall, and there are bristles on the side of the cleaning rod close to the filter screen, thereby improving the cleaning effect of the cleaning rod on the filter screen and enhancing the suction effect on the plastic powder. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a three-dimensional structural schematic diagram of the rear-dumping semi-trailer parts spraying equipment of the present invention;

[0022] Figure 2 is a schematic diagram of the installation position of the U-shaped suction pipe of the rear-dumping semi-trailer parts spraying equipment of the present invention;

[0023] Figure 3 is a side view of the rear-dumping semi-trailer parts spraying equipment of the present invention;

[0024] Figure 4 is a combined three-dimensional structural schematic diagram of the electric slide rail, electric slider, mask plate, connecting frame, U-shaped suction pipe and suction nozzle of the rear-dumping semi-trailer parts spraying equipment of the present invention;

[0025] Figure 5 is a three-dimensional structural schematic diagram of the filter system of the rear-dumping semi-trailer parts spraying equipment of the present invention;

[0026] Figure 6Schematic diagram of the combined three-dimensional structure of the branch pipe, electric actuator, fixed rod, rotating block, filter screen, cross bar, driving member, fixed block, coupling shaft, connecting block and cleaning rod of the rear unloading type semi-trailer parts spraying equipment of the present invention;

[0027] Figure 7 Cross-sectional view of the filter screen of the rear unloading type semi-trailer parts spraying equipment of the present invention;

[0028] Figure 8 Schematic diagram of the turned-out state of the filter screen of the rear unloading type semi-trailer parts spraying equipment of the present invention.

[0029] Explanation of reference numerals: 1 - spraying booth, 2 - hoisting mechanism, 3 - carriage, 11 - bottom spraying assembly, 12 - inner spraying assembly, 13 - top spraying assembly, 14 - side spraying assembly, 201 - electric slide rail, 202 - electric slider, 203 - mask plate, 204 - connecting frame, 205 - U-shaped suction pipe, 206 - suction nozzle, 2051 - branch pipe, 301 - fixing frame, 302 - collection bucket, 303 - conduit, 304 - solenoid valve, 305 - electric actuator, 306 - fixed rod, 3061 - rotating block, 307 - filter screen, 308 - cross bar, 309 - driving member, 310 - fixed block, 311 - coupling shaft, 312 - connecting block, 313 - cleaning rod. Detailed implementation manners

[0030] The present invention will be further described below in conjunction with the accompanying drawings and specific implementation manners.

[0031] Embodiment 1:

[0032] A rear unloading type semi-trailer parts spraying equipment, according to Figures 1-4 shown, includes a spraying booth 1 and a hoisting mechanism 2; a hoisting mechanism 2 is arranged in the spraying booth 1, and the hoisting mechanism 2 penetrates through the spraying booth 1; two bottom spraying assemblies 11 are arranged in the spraying booth 1; two inner spraying assemblies 12 are arranged in the spraying booth 1; two top spraying assemblies 13 are arranged in the spraying booth 1; two side spraying assemblies 14 are arranged in the spraying booth 1;

[0033] It further includes an electric slide rail 201, an electric slider 202, a mask plate 203, a connecting frame 204, a U-shaped suction pipe 205, a suction nozzle 206 and a filtering component; two electric slide rails 201 are installed inside the spraying booth 1; two electric sliders 202 are slidably connected to each electric slide rail 201; two mask plates 203 are fixedly connected to the outside of each electric slide rail 201; all the mask plates 203 are fixedly connected to the spraying booth 1; a connecting frame 204 is fixedly connected to each electric slider 202; a U-shaped suction pipe 205 is fixedly connected to the connecting frames 204 on the same side; a number of suction nozzles 206 are fixedly connected to and communicated with each U-shaped suction pipe 205, and the air inlets of all the suction nozzles 206 face the inside of the spraying booth 1; a filtering component is connected to each U-shaped suction pipe 205.

[0034] All the suction nozzles 206 are arranged in a horn shape to increase the suction range, and an anti-sticking coating is provided inside the U-shaped suction pipe 205 and the suction nozzles 206 to reduce the adhesion of the plastic powder inside the U-shaped suction pipe 205 and the suction nozzles 206.

[0035] The initial positions of the two U-shaped suction pipes 205 are respectively located at the two ends of the spraying booth 1. When spraying the carriage 3, two external pumps are pre-connected to one U-shaped suction pipe 205 each, and then the carriage 3 is hoisted onto the lifting mechanism 2 manually, and then the lifting mechanism 2 is controlled to operate to drive the carriage 3 to move into the spraying booth 1. Then, according to the moving position of the carriage 3, the corresponding bottom spraying component 11, inner spraying component 12, top spraying component 13 and side spraying component 14 inside the spraying booth 1 are controlled to operate, so as to spray the plastic powder on the outer surface of the carriage 3, thereby realizing the spraying of the plastic powder on the carriage 3. After the spraying is completed, the lifting mechanism 2 is controlled to operate to drive the carriage 3 out of the spraying booth 1 and then move to the next process;

[0036] However, when the existing spraying booth 1 sprays the plastic powder on the carriage 3, a large amount of plastic powder will float in the spraying booth 1, which will cause the plastic powder to easily settle on the surface of the carriage 3 that has been sprayed, especially when the sprayed area of the carriage 3 remains in the spraying booth 1, which will easily cause the floating plastic powder to adhere to the surface of the carriage 3 again, resulting in uneven coating thickness of the carriage 3 in some areas due to multiple adsorption of the plastic powder.

[0037] To solve the above problems, when the bottom spraying component 11, inner spraying component 12, top spraying component 13 and side spraying component 14 inside the spraying booth 1 operate to spray the carriage 3, the positions of the two U-shaped suction pipes 205 remain unchanged, that is, they are respectively located at the two ends of the spraying booth 1, as Figure 2As shown, then control the start and operation of two peripheral pump machines to suck air, so that negative pressure is generated in both U-shaped suction pipes 205. Then, the plastic powder floating at the two ends of the spraying booth 1 is sucked through all the suction nozzles 206 on the two U-shaped suction pipes 205, thereby reducing the phenomenon of plastic powder floating out of the spraying booth 1, reducing the pollution of the plastic powder to the on-site production environment, and reducing the harm to the physical health of on-site workers. At the same time, the plastic powder is collected through the filtering components on the U-shaped suction pipes 205, reducing plastic powder waste and production costs. Moreover, by sucking at the two ends of the spraying booth 1 through the two U-shaped suction pipes 205, the air flow inside the spraying booth 1 is made more stable, avoiding affecting the spraying effect.

[0038] After the spraying of the carriage 3 is completed, control all the electric sliders 202 to start moving along the corresponding electric slide rails 201, so that the two electric sliders 202 on the same electric slide rail 201 move towards each other. Each electric slider 202 drives the corresponding connecting frame 204 to move, and the connecting frame 204 drives the corresponding U-shaped suction pipe 205 to move. Then, the two U-shaped suction pipes 205 move towards each other and move into the spraying booth 1. Moreover, the U-shaped suction pipes 205 maintain the suction state during the movement. Thus, the plastic powder floating in the entire spraying booth 1 is sucked by the two U-shaped suction pipes 205 moving towards each other, and the sucked plastic powder is collected through the filtering components on the U-shaped suction pipes 205. Thereby, the possibility of the floating plastic powder adhering to the surface of the carriage 3 again is reduced, and the uniformity of the coating thickness of the carriage 3 is improved. And through the setting of the mask plate 203, the plastic powder adhering to the electric slide rail 201 and the electric slider 202 is reduced, thus ensuring the normal operation of the electric slide rail 201 and the electric slider 202.

[0039] It should be noted that since the existing spraying booth 1 is for accommodating a large semi-trailer carriage 3 with a large volume and a large internal space, there will be more plastic powder floating in the spraying booth 1. To save the floor area of the spraying booth 1 and the usage amount of powder materials, the total length of the spraying booth 1 is shortened, and the two ends of the spraying booth 1 are set to be open to reduce the plastic powder floating in the spraying booth 1. At the same time, the open setting at the two ends of the spraying booth 1 facilitates the movement of the carriage 3. However, this method will cause the plastic powder to float out from the two ends of the spraying booth 1. Therefore, a U-shaped suction pipe 205 is provided at each end of the spraying booth 1 to suck the floating plastic powder.

[0040] Embodiment 2:

[0041] On the basis of Embodiment 1, according to Figures 5-8As shown, a filtering system is also included; each U-shaped suction pipe 205 is connected to a filtering system; each filtering system consists of a branch pipe 2051, an electric actuator 305, a fixed rod 306, a rotating block 3061 and a filter 307; a branch pipe 2051 is fixedly connected and connected to the U-shaped suction pipe 205; a collecting assembly is connected to the branch pipe 2051; an electric actuator 305 is fixedly connected to the inner side of the branch pipe 2051, and the electric actuator 305 is an electric push rod; the telescopic part of the electric actuator 305 is rotatably connected to the fixed rod 306; the end of the fixed rod 306 away from the electric actuator 305 is fixedly connected to the rotating block 3061; a filter 307 is fixedly connected to the inner side of the branch pipe 2051, and the filter 307 consists of two rings and filter cloth, and the filter 307 is made of cloth; the filter 307 is rotatably connected to the rotating block 3061.

[0042] An air flow sensor is provided at one end of the branch pipe 2051 away from the U-shaped suction pipe 205 for detecting the air flow passing through the branch pipe 2051 .

[0043] The filter 307 is configured to be conical and is used to filter the air and collect the plastic seal in the air.

[0044] The collecting assembly includes a fixing frame 301, a collecting bucket 302, a conduit 303 and a solenoid valve 304; the fixing frame 301 is fixedly connected to the branch pipe 2051; the collecting bucket 302 is fixedly connected to the fixing frame 301; the conduit 303 is fixedly connected to and communicated with the collecting bucket 302; and a solenoid valve 304 is installed on the conduit 303.

[0045] It also includes a cross bar 308, a driving member 309, a fixed block 310, a connecting shaft 311, a connecting block 312 and a cleaning rod 313; the rotating block 3061 is fixedly connected to two cross bars 308 at one end away from the fixed rod 306; the driving member 309 is installed on the fixed rod 306, and the driving member 309 is used to drive the fixed rod 306 to rotate; the fixed block 310 is fixedly connected to the inner side of the branch pipe 2051; the connecting shaft 311 is rotatably connected to the fixed block 310; the connecting block 312 is fixed to the connecting shaft 311; two cleaning rods 313 are fixedly connected to the connecting block 312, and all the connecting blocks 312 are combined into an eight-shaped shape, which is used to fit the surface of the filter screen 307 to clean the filter screen 307.

[0046] The driving member 309 is an impeller, and the airflow flowing through the branch pipe 2051 drives the driving member 309 to operate. The rotation of the driving member 309 drives the fixing rod 306 to rotate.

[0047] The outer surfaces of the fixing block 310, the connecting shaft 311 and the connecting block 312 are all provided with an anti-stick coating to reduce the adhesion of plastic powder.

[0048] A brush is provided on one side of the cleaning rod 313 close to the filter 307 to improve the cleaning effect of the filter 307 .

[0049] The initial state of the solenoid valve 304 is the closed state. When sucking the plastic powder, each of the two peripheral pumps is connected to a branch pipe 2051. When sucking, the peripheral pumps start to operate, and a negative pressure is generated in the corresponding U-shaped suction pipe 205 through a corresponding branch pipe 2051, so as to realize sucking the plastic powder through the U-shaped suction pipe 205. After the plastic powder enters the U-shaped suction pipe 205, it will move along the U-shaped suction pipe 205 to the branch pipe 2051, and the plastic powder is filtered by the filter screen 307 in the branch pipe 2051. And because the filter screen 307 is arranged in a conical shape, the plastic powder can stay inside the filter screen 307, so as to collect the plastic powder through the filter screen 307.

[0050] And as more and more plastic powder is collected on the filter screen 307, and the plastic powder on the filter screen 307 is in contact with the air for a long time, the plastic powder will agglomerate on the filter screen 307, which will further cause the gas flow rate in the branch pipe 2051 to decrease, and is detected by the air flow sensor in the branch pipe 2051. When the gas flow rate in the branch pipe 2051 decreases, it means that too much plastic powder is accumulated on the filter screen 307. Then control the electric actuator 305 to start and drive the fixed rod 306 to move towards the filter screen 307. The movement of the fixed rod 306 drives the rotation block 3061 to move, and the movement of the rotation block 3061 drives the filter screen 307 to move, so that the filter screen 307 turns outwards, changing the shape of the filter screen 307, as Figure 8 shown, so that the plastic powder accumulated inside the filter screen 307 falls off, and control the solenoid valve 304 to start and operate to open, so that the plastic powder falls into the collection bucket 302 through the conduit 303, so as to realize the collection of the plastic powder. After the plastic powder collection is completed, control the electric actuator 305 to start and drive the fixed rod 306 to move back to its original position, so that the filter screen 307 returns to its original state, so as to continue to filter and collect the plastic powder.

[0051] And because during the cleaning process of the filter screen 307, after changing the shape of the filter screen 307, there will still be plastic powder remaining on the surface of the filter screen 307, resulting in incomplete cleaning of the filter screen 307, which reduces the air intake in the branch pipe 2051 and affects the sucking effect of the plastic powder. When the rotation block 3061 moves to drive the filter screen 307 to move and the filter screen 307 turns outwards, changing the shape of the filter screen 307, the rotation block 3061 moves and drives the two cross bars 308 to move at the same time, and makes the two cross bars 308 move to be stuck outside the connecting block 312, as Figure 8As shown, the gas flow in the branch pipe 2051 drives the driving member 309 to rotate. The rotation of the driving member 309 drives the fixed rod 306 to rotate. The rotation of the fixed rod 306 drives the rotating block 3061 to rotate. The rotation of the rotating block 3061 drives the two cross bars 308 to rotate. The two cross bars 308 rotate and touch the connecting block 312, and drive the connecting block 312 to rotate. Furthermore, the rotation of the connecting block 312 drives the two cleaning rods 313 to rotate. Since the two cleaning rods 313 are arranged in a V-shape, the two cleaning rods 313 can rotate along the surface of the turned-out filter screen 307, so as to further clean the filter screen 307 by the rotation of the two cleaning rods 313, causing the plastic powder on the filter screen 307 to fall off. Moreover, bristles are arranged on the side of the cleaning rod 313 close to the filter screen 307, so as to improve the cleaning effect of the cleaning rod 313 on the filter screen 307, and thus improve the suction effect on the plastic powder.

[0052] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes may be made therein without departing from the principles and spirit of the invention, and the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A rear-dumping semi-trailer component spraying device, comprising a spraying chamber (1) and a lifting and transporting mechanism (2); the lifting and transporting mechanism (2) is arranged in the spraying chamber (1), and the lifting and transporting mechanism (2) penetrates through the spraying chamber (1); characterized in that: It also includes an electric slide rail (201), an electric slider (202), a mask plate (203), a connecting frame (204), a U-shaped suction pipe (205), a suction nozzle (206) and a filtering component; at least two electric slide rails (201) are installed on the spraying booth (1); at least two electric sliders (202) are slidably connected to each electric slide rail (201); at least two mask plates (203) are fixedly connected to the outside of each electric slide rail (201); all the mask plates (203) are fixedly connected to the spraying booth (1); a connecting frame (204) is fixedly connected to each electric slider (202); a U-shaped suction pipe (205) is fixedly connected to the connecting frames (204) on the same side; a number of suction nozzles (206) are connected to each U-shaped suction pipe (205), and the air inlets of all the suction nozzles (206) face the inside of the spraying booth (1); a filtering component is connected to each U-shaped suction pipe (205), and the filtering component is used to filter the plastic powder in the spraying booth (1).

2. The spray coating equipment for rear-dumping semi-trailer parts according to claim 1, characterized in that: All the suction nozzles (206) are set to be flared, and an anti-sticking coating is provided inside the U-shaped suction pipe (205) and the suction nozzles (206).

3. A rear-discharge semi-trailer component spraying device according to any one of claims 1-2, characterized in that: It also includes a filtering system; a filtering system is connected to each U-shaped suction pipe (205); each filtering system is composed of a branch pipe (2051), an electric actuator (305), a fixing rod (306), a rotating block (3061) and a filter screen (307); a branch pipe (2051) is fixedly connected and communicated with the U-shaped suction pipe (205); a collection component is connected to the branch pipe (2051), and the collection component is used to collect the plastic powder; An electric actuator (305) is fixedly connected to the branch pipe (2051), and the electric actuator (305) is an electric push rod; the telescopic part of the electric actuator (305) is rotatably connected to a fixing rod (306); a rotating block (3061) is fixedly connected to the end of the fixing rod (306) far away from the electric actuator (305); a filter screen (307) is fixedly connected to the branch pipe (2051), and the filter screen (307) is composed of two rings and a filter cloth, and the filter screen (307) is made of cloth material; The filter screen (307) is rotatably connected to the rotating block (3061).

4. A rear-dumping semi-trailer component spraying device according to claim 3, characterized in that: An air flow sensor is provided at the end of the branch pipe (2051) far away from the U-shaped suction pipe (205).

5. The spray painting equipment for rear-dumping semi-trailer parts according to claim 3, characterized in that: The filter screen (307) is set to be conical.

6. A rear-discharge semi-trailer component spraying device according to claim 3, characterized in that: The collection component includes a fixing frame (301), a collection bucket (302), a conduit (303) and a solenoid valve (304); a fixing frame (301) is fixedly connected to the branch pipe (2051); a collection bucket (302) is fixedly connected to the fixing frame (301); a conduit (303) is fixedly connected and communicated with the collection bucket (302); a solenoid valve (304) is installed on the conduit (303).

7. The spraying equipment for rear-dumping semi-trailer parts according to claim 6, characterized in that: It further includes a cross bar (308), a driving member (309), a fixing block (310), a coupling shaft (311), a connecting block (312) and a cleaning rod (313); at least two cross bars (308) are fixedly connected to one end of the rotating block (3061) away from the fixing rod (306); a driving member (309) is installed on the fixing rod (306), and the driving member (309) is used to drive the fixing rod (306) to rotate; a fixing block (310) is fixedly connected to the branch pipe (2051); a coupling shaft (311) is rotatably connected to the fixing block (310); a connecting block (312) is fixedly connected to the coupling shaft (311); at least two cleaning rods (313) are fixedly connected to the connecting block (312), and all the connecting blocks (312) are combined into an eight-shaped pattern.

8. A spray painting device for rear-dumping semi-trailer parts according to claim 7, characterized in that: The driving member (309) is an impeller.

9. The spray coating equipment for rear-dumping semi-trailer parts according to claim 7, characterized in that: Anti-sticking coatings are provided on the outer surfaces of the fixing block (310), the coupling shaft (311) and the connecting block (312).

10. A rear-discharge semi-trailer component spraying device according to claim 7, characterized in that: Brush hairs are provided on one side of the cleaning rod (313) close to the filter screen (307).

Images