Pneumatic insulating paint spraying device

Abstract

The utility model provides a pneumatic type insulating paint spraying device, which relates to the technical field of insulating paint spraying and comprises a main control module, a handheld mechanism, a spraying mechanism and a pneumatic mechanism, a protective cover of the handheld mechanism is fixedly installed at the top end of the handheld mechanism, a paint storage tank is installed on a handheld rod, the bottom of the paint storage tank is communicated with the paint inlet end of a spray head through a paint pipe, and the spray head is fixedly installed on the protective cover. A fan of the pneumatic mechanism is fixedly installed at the lower end of the handheld rod, and the air outlet end of the fan communicates with the upper end of the paint storage tank through an air pipe and further communicates with the air inlet end of the spray head through an air pipe. Blades and a motor of the fan are arranged in the shell, the motor is arranged between the blades and the air outlet end of the shell, and the driving end of the motor is rotationally connected with the blades; and the main control module is electrically connected with the fan and is used for controlling the fan to work. According to the scheme, the influence on the spraying operation efficiency can be reduced while the motor is prevented from being damaged due to heating of the motor.

Description

Technical Field

[0001] This utility model relates to the fields of insulating varnish spraying and power cable technology, and in particular to a pneumatic insulating varnish spraying device. Background Technology

[0002] Spray coating equipment is a product of the increasing automation in industrial technology. As automation levels rise, spray coating production lines are being used more widely and have penetrated into various sectors of the national economy. For example, in the power technology field, insulating varnish is applied to power cables.

[0003] Currently, for power cables with protective insulating varnish, the insulation layer can be damaged by factors such as temperature changes, strong storms, rain, fog, icing loads, and natural and industrial debris. This damage can weaken or reduce the insulation strength, leading to power accidents. Therefore, it is necessary to repair power cables by spraying insulating varnish.

[0004] Currently, when applying insulating varnish to power cables, a varnish spraying robot is typically used. This robot walks along the overhead power line and sprays the varnish as it moves. For example, in the varnish spraying device for overhead bare power transmission lines disclosed in patent number CN201310570566.3, two wheels travel along the conductor. Personnel on the pole turn on the electric pump, and personnel below the pole use ropes to pull the traction hole on the upright plate. The electric pump sprays the insulating varnish from the tank onto the surface of the conductor through the pump and nozzle. This invention effectively reduces the difficulty of spraying varnish on bare aluminum wires and speeds up the spraying process. For example, the uniform spraying device for insulating paint on overhead power lines disclosed in patent number CN201921110583.8 includes a mobile vehicle, a power module, an airborne control system, a mixing module, a spraying module, and a clamping device. The mobile vehicle is suspended on the overhead power line and moves back and forth along it. The power module, airborne control system, and clamping device are mounted on the upper connecting plate, while the mixing module and spraying module are mounted on the lower connecting plate. The airborne control system communicates with the ground station via a wireless communication unit, receiving control commands from the ground station for speed, forward, backward, stop, mixing, spraying, and stop spraying, and sending back detection data such as operating speed, current voltage of the power module, and tilt angle of the distribution network conductors to the ground station.

[0005] However, all of the above-mentioned existing solutions require the entire device to be fixedly installed on the cable, which is cumbersome to install and disassemble, and has poor operational flexibility, thus affecting the spraying efficiency.

[0006] Furthermore, when using a fan to drive the spraying of insulating varnish, the fan motor needs to operate continuously during the spraying process, and the motor is a device prone to overheating. For example, the background art of Chinese utility model patent application number 202320951820.3 points out that the motor of a centrifugal blower generates a lot of heat due to its operating speed of around 30,000 rpm, and therefore proposes a rapid cooling device for centrifugal blowers to reduce the damage caused by motor overheating. Another example is the background art of Chinese utility model patent application number 202321165236.1, which points out that existing fans are prone to overheating of the fan motor during prolonged operation, affecting the service life of the fan motor. Yet another example is the background art of Chinese utility model patent application number 202321098994.6, which points out that the motor inside existing fans lacks a good heat dissipation method, and when the motor is used for a long time, the internal heat becomes too high, leading to increased motor wear and tear. Utility Model Content

[0007] In view of this, and to address the above shortcomings, it is necessary to propose a pneumatic insulating paint spraying device that does not require the device to be fixedly installed on a cable, thus avoiding the cumbersome installation and disassembly process. It can be operated flexibly through a handheld mechanism, which helps to improve the efficiency of spraying operations. At the same time, it can reduce the occurrence of motor damage due to motor overheating.

[0008] This utility model provides a pneumatic insulating paint spraying device, which includes: a main control module, a handheld mechanism, a spraying mechanism and a pneumatic mechanism;

[0009] The handheld mechanism includes a handheld handle, and the spraying mechanism includes a protective cover, a nozzle, and a paint reservoir. The protective cover is fixedly installed at the top of the handheld mechanism, and the paint reservoir is installed on the handheld handle near the top. The bottom of the paint reservoir and the paint inlet of the nozzle are connected through a paint pipe, and the nozzle is fixedly installed on the protective cover. The pneumatic mechanism includes at least one fan, which is fixedly installed at the lower end of the handheld handle. The air outlet of the fan is connected to the upper end of the paint reservoir through an air pipe, so as to use air pressure to push the insulating paint in the paint reservoir from the nozzle. The air outlet of the fan is also connected to the air inlet of the nozzle through an air pipe, so as to shape the insulating paint sprayed from the nozzle.

[0010] Each of the aforementioned fans includes a motor, blades, and a housing. The blades and the motor are both disposed inside the housing. The blades are positioned near the air inlet end of the housing, and the motor is positioned between the blades and the air outlet end of the housing. The drive end of the motor is rotatably connected to the blades so that the airflow drawn in by the rotating blades flows through the motor, thereby carrying away the heat generated by the motor. The main control module is fixedly installed at the lower end of the handheld mechanism and is electrically connected to each fan to control the operation of each fan.

[0011] Preferably, the nozzle includes a first nozzle and a second nozzle, and the pneumatic mechanism includes a first fan and a second fan respectively fixedly installed on both sides of the main control module. The air pipe connected to the air outlet of the first fan is connected to the upper end of the paint storage tank and the air inlet of the first nozzle through a three-way component. The air outlet of the second fan is connected to the air inlet of the second nozzle through an air pipe. The paint pipe connected to the lower end of the paint storage tank is connected to the paint inlet of the first nozzle and the second nozzle through a three-way component.

[0012] Preferably, the handheld mechanism further includes an angle adjustment component and an opening / closing adjustment component. The lower end of the angle adjustment component is fixedly connected to the top end of the handheld mechanism, and the upper end is connected to the opening / closing adjustment component to adjust the angle between the protective cover and the handheld mechanism. The protective cover includes a movable annular shell and a non-movable annular shell. The opening / closing adjustment component includes an L-shaped connector, a first drive component, and a first fixing component. The upper end of the angle adjustment component is fixedly connected to the side of the L-shaped connector. The upper end of the longitudinal plate of the L-shaped connector is movably connected to the bottom of the movable annular shell. The side of the longitudinal plate of the L-shaped connector is fixedly connected to one end of the first fixing component, and the other end of the first fixing component is fixedly connected to the non-movable annular shell. The fixed end of the first drive component is fixedly connected to the transverse plate of the L-shaped connector, and the drive end is movably connected to the side of the movable annular shell to control the opening and closing of the protective cover through the first drive component. The main control module is electrically connected to the first drive component and is used to control the operation of the first drive component.

[0013] Preferably, a limiting member is fixedly provided on the inner wall of the movable annular shell of the protective cover. The limiting member is provided with several slots for clamping the power cable; the nozzles of the first nozzle and the second nozzle are both facing the direction of the limiting member.

[0014] Preferably, the hand-held mechanism further includes an extension rod, one end of which has an internal thread and the bottom end of the hand-held rod has an external thread. The extension rod is used to fix the hand-held rod to the hand-held rod through a threaded engagement.

[0015] Preferably, the device further includes a remote controller, which is communicatively connected to the main control module for controlling the operation of the fan and the first drive component.

[0016] Preferably, the fan further includes a dustproof pad, which is disposed on the inner side of one end of the housing air inlet and located between the blades and the housing air inlet.

[0017] Preferably, a shock-absorbing pad is provided between the outer edge of the blade and the inner wall of the outer shell.

[0018] Preferably, the outer shell is funnel-shaped, with the larger end of the funnel-shaped outer shell serving as the air inlet and the smaller end serving as the air outlet.

[0019] Preferably, the main control module is also equipped with a power supply battery to supply power to the main control module and each power-consuming component.

[0020] As can be seen from the above technical solution, the pneumatic insulating varnish spraying device provided in this utility model embodiment includes a main control module, a handheld mechanism, a spraying mechanism, and a pneumatic mechanism. The pneumatic mechanism mainly consists of a fan, which is fixedly installed at the lower end of the handheld mechanism. Its outlet end is connected to the varnish storage tank and the inlet end of the nozzle via an air pipe. It is used to use air pressure to push the insulating varnish in the varnish storage tank out of the nozzle to achieve insulating varnish spraying. Simultaneously, gas is ejected from the outlet end of the nozzle to shape the insulating varnish spray. Furthermore, the fan specifically includes a motor, blades, and a housing. The motor is located between the blades and the outlet end. When the motor drives the blades to rotate, it draws in outside air into the housing and delivers it to the fan's outlet end. The outside air flows through the motor, and the heat generated by the motor is carried away by the outside air drawn in by the fan, thereby reducing the motor temperature and preventing damage to the fan due to overheating during prolonged operation. It also reduces the number of times spraying operations need to be paused to allow the motor to cool down, thus reducing the impact on spraying efficiency. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of a pneumatic insulating paint spraying device provided for an embodiment of the present invention.

[0022] Figure 2 This is a schematic diagram of a spraying mechanism and a handheld mechanism provided for an embodiment of the present utility model.

[0023] Figure 3 This is a schematic diagram of a spraying mechanism provided for an embodiment of the present utility model.

[0024] Figure 4 This is a schematic diagram of a pneumatic insulating paint spraying device after assembling an extension rod, provided as an embodiment of the present utility model.

[0025] Figure 5A cross-sectional view of a fan provided in an embodiment of this utility model.

[0026] In the diagram: Main control module 10, handheld mechanism 20, handheld stick 21, extension stick 22, angle adjustment component 23, opening and closing adjustment component 24, L-shaped connector 241, first drive component 242, first fixing component 243, spraying mechanism 30, protective cover 31, movable annular shell 311, non-movable annular shell 312, spray nozzle 32, paint tank 33, limiting component 34, slot 35, pneumatic mechanism 40, motor 41, blade 42, outer shell 43, dustproof pad 44, shock absorption pad 45, remote control 50, power supply battery 60. Detailed Implementation

[0027] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] See Figure 1-5 This utility model provides a pneumatic insulating paint spraying device, which includes: a main control module 10, a handheld mechanism 20, a spraying mechanism 30 and a pneumatic mechanism 40.

[0029] The handheld mechanism 20 includes a handheld lever 21, and the spraying mechanism 30 includes a protective cover 31, a nozzle 32, and a paint storage tank 33. The protective cover 31 is fixedly installed on the top of the handheld mechanism 20, and the paint storage tank 33 is installed on the handheld lever 21 near the top. The bottom of the paint storage tank 33 and the paint inlet end of the nozzle 32 are connected through a paint pipe. The nozzle 32 is fixedly installed on the protective cover 31. The pneumatic mechanism 40 includes at least one fan, which is fixedly installed on the lower end of the handheld lever 21. The air outlet end of the fan is connected to the upper end of the paint storage tank 33 through an air pipe to push the insulating paint in the paint storage tank 33 out of the nozzle 32 through air pressure. The air outlet end of the fan is also connected to the air inlet end of the nozzle 32 through an air pipe to shape the insulating paint spray from the nozzle 32.

[0030] Each fan includes a motor 41, blades 42, and a housing 43. Both blades 42 and motor 41 are located inside the housing 43. Blades 42 are located near the air inlet of the housing 43, and motor 41 is located between blades 42 and the air outlet of the housing 43. The drive end of motor 41 is rotatably connected to blades 42 so that the airflow drawn in by the rotating blades 42 flows through motor 41, thus carrying away the heat generated by motor 41. The main control module 10 is fixedly installed at the lower end of the handheld mechanism 20 and is electrically connected to each fan to control the operation of each fan.

[0031] In this embodiment, the fan mainly consists of a motor 41, blades 42, and a housing 43. The motor 41 is located between the blades 42 and the air outlet. When the motor 41 drives the blades 42 to rotate, it draws outside air into the housing 43 and delivers it to the air outlet of the fan. During delivery, the outside air passes through the motor 41, and the heat generated by the motor 41 is carried away by the outside air drawn in by the fan. This reduces the temperature of the motor 41, preventing the fan from being damaged due to overheating during prolonged operation. It also reduces the number of times the spraying operation needs to be paused to allow the motor 41 to cool down, thereby reducing the impact on the efficiency of the spraying operation.

[0032] Furthermore, since the motor 41 is located behind the blade 42, the blade 42 can carry away the heat from the motor 41. As a result, the temperature of the air generated by the fan increases after passing through the motor 41. When the air is used as the driving force for spraying the insulating varnish from the varnish storage tank 33, it can delay the increase in viscosity of the insulating varnish due to factors such as low temperature to a certain extent. This can solve the problem to a certain extent that the viscosity of the insulating varnish increases due to low temperature, resulting in poor spraying effect or ineffective spraying.

[0033] The handheld mechanism 20 may include an extension rod 22 in addition to the handheld lever 21. One end of the extension rod 22 has an internal thread, and the bottom end of the handheld lever 21 has an external thread. Thus, the extension rod 22 can be threadedly fixed to the handheld lever 21. Of course, several extension rods 22 of different sizes can be equipped simultaneously. In practical applications, an extension rod 22 of appropriate length can be selected and attached to the end of the handheld lever 21 according to the working height.

[0034] Furthermore, the handheld mechanism 20 may include an angle adjustment component 23 and an opening / closing adjustment component 24. The lower end of the angle adjustment component 23 is fixedly connected to the top end of the handheld mechanism 20, and the upper end is connected to the opening / closing adjustment component 24 to adjust the angle between the protective cover 31 and the handheld mechanism 20. The protective cover 31 includes a movable annular shell 311 and a non-movable annular shell 312. The opening / closing adjustment component 24 includes an L-shaped connector 241, a first drive component 242, and a first fixing component 243. The upper end of the angle adjustment component 23 is fixedly connected to the side of the L-shaped connector 241, and the longitudinal direction of the L-shaped connector 241 is... The upper end of the plate is movably connected to the bottom of the movable annular housing 311. The longitudinal side of the L-shaped connector 241 is fixedly connected to one end of the first fixing member 243, and the other end of the first fixing member 243 is fixedly connected to the non-movable annular housing 312. The fixed end of the first drive assembly 242 is fixedly connected to the transverse plate of the L-shaped connector 241, and the drive end is movably connected to the side of the movable annular housing 311, so as to control the opening and closing of the protective cover 31 through the first drive assembly 242. The main control module 10 is electrically connected to the first drive assembly 242 and is used to control the operation of the first drive assembly 242.

[0035] In this embodiment, the opening and closing adjustment component 24 includes an L-shaped connector 241, a first drive component 242, and a first fixing component 243. The upper end of the angle adjustment component 23 is fixedly connected to the L-shaped connector 241. A protrusion is provided on the longitudinal plate of the L-shaped connector 241, which can be movably connected to the bottom of the movable annular housing 311. The first fixing component 243 is fixed to the side of the longitudinal plate. The fixed end of the first drive component 242 is fixedly connected to one end of the transverse plate, and the drive end is movably connected to the side of the movable annular housing 311. Thus, the non-movable annular housing 312 is the fixed half of the protective cover 31, and the movable annular housing 311 can close and open the protective cover 31 by extending and retracting the drive end of the first drive component 242.

[0036] The angle adjustment component 23 enables angle adjustment between the protective cover 31 and the handheld mechanism 20, allowing the spraying device to adapt to more complex environments with power cables and thus broadening its application range. Specifically, for example, a fixing component can be provided fixed to the opening / closing adjustment component 24, and another fixing component can be provided fixed to the top of the handheld mechanism 20. These two fixing components are movably connected by fasteners. In practical applications, the angle between the two fixing components can be adjusted by adjusting the fasteners, thereby adjusting the angle between the handheld mechanism 20 and the protective cover 31.

[0037] The spraying mechanism 30 mainly includes a protective cover 31, a nozzle 32, and a paint storage tank 33. The protective cover 31 not only facilitates the fixing of the nozzle 32 onto the protective cover 31, but also blocks the wind, preventing the insulating paint sprayed from the nozzle 32 from being blown away from the power cable to be sprayed, thus reducing the spraying effect and efficiency. In addition, the protective cover 31 also provides a certain degree of protection, reducing the amount of dust, suspended matter, and other debris falling onto the undried insulating paint during the spraying process, which could affect the insulation effect.

[0038] The pneumatic mechanism 40 is mainly composed of a fan, which is used to supply air to the upper end of the paint storage tank 33 and the air inlet end of the nozzle 32 respectively, thereby driving the insulating paint in the paint storage tank 33 to be sprayed out of the nozzle 32 through air pressure, and shaping the insulating paint sprayed out of the nozzle 32.

[0039] In one embodiment, the nozzle 32 may include a first nozzle and a second nozzle, and the pneumatic mechanism 40 includes a first fan and a second fan respectively fixedly installed on both sides of the main control module 10. The air pipe connected to the air outlet of the first fan is connected to the upper end of the paint storage tank 33 and the air inlet of the first nozzle through a three-way component. The air outlet of the second fan is connected to the air inlet of the second nozzle through an air pipe, and the paint pipe connected to the lower end of the paint storage tank 33 is connected to the paint inlet of the first nozzle and the second nozzle through a three-way component.

[0040] In this embodiment, two nozzles 32 can be installed on the protective cover 31, allowing for the spraying of insulating varnish onto the power cable from different angles, thereby improving the efficiency and uniformity of the spraying. Furthermore, each nozzle 32 requires a fan to operate; using a single nozzle 32 and a single fan reduces the uniformity and efficiency of the insulating varnish spraying. If more than two nozzles 32 are installed, a corresponding number of fans are needed, significantly increasing the weight of the entire device and making handheld operation more difficult for non-operating personnel.

[0041] The nozzles on a typical spray head 32 are circular, resulting in a dispersed cone-shaped spray of insulating varnish. This leads to poor efficiency and effectiveness in coating power cables, and the varnish is easily sprayed outside the cable, causing waste. Furthermore, it is difficult to ensure uniform coating of regularly shaped power cables, requiring repeated spraying to maintain even coverage. Therefore, this solution shapes the insulating varnish spray at the outlet of the spray head 32, creating a sheet-like spray. This sheet-like spray is not only more uniform but also more suitable for coating power cables with regular edges. Specifically, when shaping the insulating varnish spray, two air outlets can be arranged opposite each other along the path of the sprayed insulating varnish on the spray head 32.

[0042] Furthermore, a limiting member 34 can be fixedly installed on the inner wall of the movable annular housing 311 of the protective cover 31. This limiting member 34 can have several slots 35 for engaging the power cable. The nozzles of both the first and second spray heads can be aligned directly with the limiting member 34. In practical applications, this allows the power cable to be coated to be positioned at the appropriate coating location, ensuring accuracy and efficiency while reducing waste of insulating varnish due to missed coatings on the power cable.

[0043] In one embodiment, the fan may further include a dustproof pad 44, which is disposed on the inner side of one end of the air inlet of the housing 43 and located between the blades 42 and the air inlet of the housing 43. This can prevent external sand and other debris from being sucked into the fan, causing blockage or even damage to the fan and its pipelines.

[0044] In actual operation of the wind turbine, the blades 42 will generate significant vibrations due to high-speed rotation. This can easily damage the inner wall of the outer casing 43, and the severe vibrations will greatly increase the difficulty for operators to hold the blades. Therefore, it is recommended to install a shock-absorbing pad 45, such as shock-absorbing cotton, between the outer edge of the blades 42 and the inner wall of the outer casing 43 to reduce the vibration transmitted when the blades 42 rotate.

[0045] The fan casing 43 can be funnel-shaped, with the larger end of the casing 43 serving as the air inlet, facing the tail of the handle 21, and the smaller end serving as the air outlet, facing the spraying mechanism 30. By arranging the casing 43 in a funnel shape, the air generated by the rotation of the blades 42, when transported to the outlet, experiences increased internal pressure and wind speed due to the reduced diameter of the casing 43's inner cavity. Consequently, the pressure of the gas discharged from the outlet is also greater, enabling the fan to generate a higher wind speed with the same power output.

[0046] In addition, the spraying device may also include a remote control 50, which is communicatively connected to the main control module 10 to control the operation of the fan and the first drive assembly 242. In practice, the remote control 50 can be held by the operator or fixed to the handheld lever 21 or the extension lever 22.

[0047] Of course, a power supply battery 60 should be provided on the main control module 10 to supply power to the main control module 10 and each electrical component. The power supply battery 60 can be a rechargeable battery.

[0048] Specifically, when using the spraying device provided in this solution for spraying operations, firstly, select a suitable extension rod according to the location of the power cable to be sprayed, and adjust the angle between the protective cover and the handheld mechanism. After proper adjustment, the operator holds the extension rod and moves the device to the power cable to be sprayed, and can open the protective cover using a remote control. After the protective cover is opened, the power cable to be sprayed is secured by the limiting device inside the protective cover. At this time, the protective cover is closed by controlling the remote control, and the pneumatic mechanism is engaged to complete the spraying operation on the power cable. To ensure uniform spraying, after one side is sprayed, the device can be rotated to spray the other side.

[0049] The modules or units in the device of this utility model embodiment can be merged, divided, and deleted according to actual needs. The above-disclosed embodiments are merely preferred embodiments of this utility model and should not be construed as limiting the scope of this utility model. Those skilled in the art can understand that implementing all or part of the processes of the above embodiments and making equivalent changes according to the claims of this utility model still fall within the scope of this utility model.

Claims

1. A pneumatic type insulation paint spraying device, characterized by, The spraying device comprises a main control module, a handheld mechanism, a spraying mechanism and a pneumatic mechanism. The handheld mechanism comprises a handheld rod, the spraying mechanism comprises a protective cover, a spraying head and a paint storage tank, the protective cover is fixedly installed at the top end of the handheld mechanism, the paint storage tank is installed on the handheld rod near the top end, the bottom of the paint storage tank and the paint inlet end of the spraying head are communicated through a paint pipe, and the spraying head is fixedly installed on the protective cover; the pneumatic mechanism comprises at least one fan, the fan is fixedly installed at the lower end of the handheld rod, the air outlet end of the fan is communicated with the upper end of the paint storage tank through an air pipe, the air pressure is used to push the insulating paint in the paint storage tank to be sprayed out of the spraying head, and the air outlet end of the fan is also communicated with the air inlet end of the spraying head through an air pipe, so that the insulating paint spray sprayed out of the spraying head is shaped. Each fan comprises a motor, a blade and a shell, the blade and the motor are arranged in the shell, the blade is arranged at the air inlet end of the shell, the motor is arranged between the blade and the air outlet end of the shell, and the driving end of the motor is rotatably connected with the blade, so that the air flow sucked by the blade flows through the motor and takes away the heat generated by the motor; the main control module is fixedly installed at the lower end of the handheld mechanism and is electrically connected with each fan, so as to control the operation of each fan.

2. The air-activated insulation paint spraying device according to claim 1, wherein, The spraying head comprises a first spraying head and a second spraying head, the pneumatic mechanism comprises a first fan and a second fan which are fixedly installed on the two sides of the main control module, the air pipe connected with the air outlet end of the first fan is communicated with the upper end of the paint storage tank and the air inlet end of the first spraying head through a three-way component, the air outlet end of the second fan is communicated with the air inlet end of the second spraying head through an air pipe, and the paint pipe connected with the lower end of the paint storage tank is communicated with the paint inlet end of the first spraying head and the second spraying head through a three-way component.

3. The air-activated insulation spray painting device according to claim 2, wherein, The handheld mechanism further comprises an angle adjusting assembly and an opening and closing adjusting assembly, the lower end of the angle adjusting assembly is fixedly connected with the top end of the handheld mechanism, the upper end is connected with the opening and closing adjusting assembly, and the angle between the protective cover and the handheld mechanism is adjusted; the protective cover comprises a movable annular shell and a non-movable annular shell, the opening and closing adjusting assembly comprises an L-shaped connecting piece, a first driving assembly and a first fixing piece, the upper end of the angle adjusting assembly is fixedly connected with the side surface of the L-shaped connecting piece, the upper end of the longitudinal plate of the L-shaped connecting piece is movably connected with the bottom of the movable annular shell, the side surface of the longitudinal plate of the L-shaped connecting piece is fixedly connected with one end of the first fixing piece, and the other end of the first fixing piece is fixedly connected with the non-movable annular shell; the fixed end of the first driving assembly is fixedly connected on the transverse plate of the L-shaped connecting piece, the driving end is movably connected with the side surface of the movable annular shell, and the opening and closing of the protective cover is controlled through the first driving assembly; the main control module is electrically connected with the first driving assembly, and is used to control the operation of the first driving assembly.

4. The air-activated insulation spray painting device according to claim 3, wherein The inner wall of the movable annular shell of the protective cover is further provided with a limiting piece, and a plurality of clamping grooves are arranged on the limiting piece to clamp the power cable; the nozzles of the first and second spray heads are opposite to the direction where the limiting piece is located.

5. The air-activated insulation spray painting device according to claim 3, wherein The handheld mechanism further comprises an extension rod, one end of which is provided with an internal thread, and the bottom end of the handheld rod is provided with an external thread, and the extension rod is used to be fixed on the handheld rod through thread cooperation.

6. The air-activated insulation spray painting device according to claim 5, wherein The device further comprises a remote controller which is in communication connection with the main control module, so as to control the working of the fan and the first driving assembly through the remote controller.

7. The air-activated insulation spray painting device according to claim 1, wherein The fan further comprises a dustproof pad which is arranged on the inner side of one end of the air inlet end of the shell and is located between the blade and the air inlet end of the shell.

8. The air-activated insulation paint spraying device of claim 7, wherein, A damping pad is arranged between the outer edge of the blade and the inner wall of the shell.

9. The air-activated insulation paint spraying device of claim 8, wherein, The shell is funnel-shaped, and the large end of the funnel-shaped shell is the air inlet end, and the small end is the air outlet end.

10. The air-activated insulation paint spraying device according to any one of claims 1 to 9, characterized in that, The main control module is further provided with a power supply battery for supplying power to the main control module and each electrical component.

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