CN219112081U

CN219112081U - Coating system

Info

Publication number: CN219112081U
Application number: CN202223385592.2U
Authority: CN
Inventors: 乐林江
Original assignee: Yancheng Keao Mechanical Co ltd
Current assignee: Yancheng Keao Mechanical Co ltd
Priority date: 2022-12-16
Filing date: 2022-12-16
Publication date: 2023-06-02
Anticipated expiration: 2032-12-16

Abstract

The utility model discloses a coating system, which comprises a coating device and a tunnel type heating device; the coating device comprises a lifting driving mechanism, a transferring driving mechanism, a rotating driving mechanism and a coating mechanism; the tunnel type heating device comprises a heat preservation shell, a steel mesh conveying belt and a heating mechanism. The coating system can realize lifting and horizontal transfer of the rotary driving mechanism by utilizing the lifting driving mechanism and the transfer driving mechanism, so that the loaded workpieces are transferred between the coating mechanism and the steel mesh conveying belt, manual transportation is reduced, and the working efficiency and the production safety are improved; the lifting driving mechanism can be utilized to adjust the height of the rotary driving mechanism, so that the loaded workpieces can enter different height positions of the coating mechanism to be coated and spin-dried.

Description

Coating system

Technical Field

The utility model relates to a workpiece surface treatment system, in particular to a coating system.

Background

Coating the surface of a workpiece can form a film layer to improve the surface performance. The surface property of the workpiece can be enhanced by the coating layer, the bonding strength of the coating layer and the matrix material can be enhanced by heating and baking, and the coating has wider application scenes. At present, the existing coating system is characterized in that a manual conveying mode is adopted between a coating machine and a heating device for feeding and discharging, so that the working efficiency is low, and a certain safety risk exists.

Disclosure of Invention

The utility model aims at: the utility model provides a coating system can realize that the work piece is transported between coating machine and heating device's level, reduces artifical the participation for the work piece after the coating is accomplished can get into heating device as early as possible and heat and toast, improves production efficiency, reduces the security risk.

In order to achieve the above object, the present utility model provides a coating system including a coating device and a tunnel heating device; the coating device comprises a lifting driving mechanism, a transferring driving mechanism, a rotating driving mechanism and a coating mechanism; the tunnel type heating device comprises a heat preservation shell, a steel mesh conveying belt and a heating mechanism; the steel mesh conveyor belt is arranged on the heat-preserving shell in a penetrating way, the heating mechanism is arranged in the heat-preserving shell, the steel mesh conveyor belt conveys the workpiece into the heat-preserving shell, and the heating mechanism heats and toasts the workpiece; the transfer driving mechanism is arranged on the lifting driving mechanism, and the lifting driving mechanism drives the transfer driving mechanism to move up and down; the rotary driving mechanism is arranged on the transferring driving mechanism, and the transferring driving mechanism drives the rotary driving mechanism to horizontally transfer between the coating mechanism and the steel mesh conveying belt; the rotary driving mechanism is used for loading the workpiece into and out of the coating mechanism to carry out coating treatment and spin-drying the coated workpiece.

Further, the lifting driving mechanism comprises a supporting tubular column, a lifting driving motor, a lifting sliding sleeve and a lifting driving screw rod; the lifting sliding sleeve is slidably arranged on the supporting pipe column, the lifting driving screw rod is vertically and rotatably arranged, and the lifting sliding sleeve is in threaded fit with the lifting driving screw rod; the lifting driving motor is used for driving the lifting driving screw rod to rotate; the transfer driving mechanism is arranged on the lifting sliding sleeve.

Further, the transferring driving mechanism comprises a rotary supporting sleeve, a cantilever beam and a transferring driving motor; the rotary supporting sleeve is rotatably arranged on the lifting sliding sleeve, and the transferring driving motor drives the rotary supporting sleeve to rotate through the worm and gear mechanism; the cantilever beam is fixedly arranged on the rotary supporting sleeve, and the rotary driving mechanism is arranged on the cantilever end part of the cantilever beam.

Further, the rotary driving mechanism comprises a rotary driving motor, a rotary driving shaft, a U-shaped frame and a steel mesh drum; the upper end of the rotary driving shaft is rotatably arranged on the overhanging end part of the overhanging beam, and the rotary driving motor drives the rotary driving shaft to rotate through a sprocket transmission mechanism; the lower end of the rotary driving shaft is fixed in the middle of the upper side frame of the U-shaped frame; the lower ends of the two vertical frames of the U-shaped frame are respectively hinged at the bisection points of the bottom edge of the steel mesh cylinder; and two vertical frames of the U-shaped frame are respectively provided with a hand-screwed bolt in a penetrating mode, and the end parts of the two hand-screwed bolts are respectively inserted into the positioning pin holes at the bisection points of the top edge of the steel mesh cylinder.

Further, the coating mechanism comprises a spin-drying cylinder and a liquid storage cylinder; the spin-drying tube is arranged above the liquid storage tube, and the bottom of the spin-drying tube is communicated with the top of the liquid storage tube; the top of the spin-drying tube is provided with an inlet and outlet window.

Further, the heating mechanism comprises a height adjusting unit, each upper-layer electric heating unit and each lower-layer electric heating unit; each lower-layer electric heating unit is arranged in the heat-preserving shell and is positioned below the steel mesh conveyer belt; each upper electric heating unit is suspended in the heat-preserving shell through the height adjusting unit and is positioned above the steel mesh conveyer belt; the height adjusting unit is used for synchronously adjusting the heights of the upper-layer electric heating units.

Further, the height adjusting unit comprises an adjusting driving motor and lifting driving components; each lifting driving assembly comprises a lifting driving shaft and a lifting driving steel rope; the lifting driving shafts are rotatably arranged in the heat-preserving shell, one end shaft head extends out of the heat-preserving shell, and synchronous rotation transmission is realized between adjacent lifting driving shafts through a transmission chain wheel mechanism; the adjusting driving motor is used for driving one lifting driving shaft to rotate; a steel rope reel is fixedly arranged on the lifting driving shaft, the lower end of the lifting driving steel rope is fixed on the corresponding upper-layer electric heating unit, and the upper end of the lifting driving steel rope is fixed on the steel rope reel at the corresponding position.

Further, the upper electric heating unit comprises a heat insulation column, a heating cover and each upper electric heating tube; the upper end of the heat insulation column extends out of the top of the heat insulation shell in a penetrating way, and the lower end of the heat insulation column is fixedly arranged at the center of the top of the heating cover; the upper electric heating pipes are distributed and arranged in the lower cover opening of the heating cover, and the wiring ends of the upper electric heating pipes extend out of the heat insulation shell from the inside of the heat insulation column.

The utility model has the beneficial effects that: the lifting driving mechanism and the transferring driving mechanism can be used for realizing lifting and horizontal transferring of the rotary driving mechanism, so that the loaded workpiece is transferred between the coating mechanism and the steel mesh conveying belt, manual conveying is reduced, and the working efficiency and the production safety are improved; the lifting driving mechanism can be utilized to adjust the height of the rotary driving mechanism, so that the loaded workpieces can enter different height positions of the coating mechanism to be coated and spin-dried; the steel mesh conveyer belt and the heating mechanism are utilized to immediately heat and bake the coated workpiece in a running water mode, so that the coating performance is ensured.

Drawings

FIG. 1 is a schematic diagram of the overall structure of the present utility model;

FIG. 2 is a schematic view of a partial cross-sectional structure of the present utility model;

fig. 3 is a schematic structural diagram of a tunnel heating device according to the present utility model.

Detailed Description

The technical scheme of the present utility model will be described in detail with reference to the accompanying drawings, but the scope of the present utility model is not limited to the embodiments.

Example 1:

as shown in fig. 1-3, the disclosed coating system includes: a coating device and a tunnel heating device; the coating device comprises a lifting driving mechanism, a transferring driving mechanism, a rotating driving mechanism and a coating mechanism; the tunnel type heating device comprises a heat preservation shell, a steel mesh conveying belt and a heating mechanism; the steel mesh conveyer belt is arranged on the heat-preserving shell in a penetrating way, the heating mechanism is arranged in the heat-preserving shell, the steel mesh conveyer belt conveys the workpiece 45 into the heat-preserving shell, and the heating mechanism heats and toasts the workpiece 45; the transfer driving mechanism is arranged on the lifting driving mechanism, and the lifting driving mechanism drives the transfer driving mechanism to move up and down; the rotary driving mechanism is arranged on the transferring driving mechanism, and the transferring driving mechanism drives the rotary driving mechanism to horizontally transfer between the coating mechanism and the steel mesh conveying belt; the rotary driving mechanism is used for loading the workpiece 45 into and out of the coating mechanism for coating treatment and spin-drying the coated workpiece 45.

The lifting and horizontal transfer of the rotary driving mechanism can be realized by utilizing the lifting driving mechanism and the transfer driving mechanism, so that the loaded workpiece 45 is transferred between the coating mechanism and the steel mesh conveying belt, the manual transfer is reduced, and the working efficiency and the production safety are improved; the lifting driving mechanism can be utilized to adjust the height of the rotary driving mechanism, so that the loaded workpieces 45 can enter different height positions of the coating mechanism to be coated and spin-dried; the steel mesh conveyer belt and the heating mechanism can be utilized to immediately perform running water type heating and baking on the coated workpiece 45, so that the coating performance is ensured.

Further, the lifting driving mechanism comprises a supporting pipe column 2, a lifting driving motor 5, a lifting sliding sleeve 4 and a lifting driving screw 3; the lifting sliding sleeve 4 is slidably arranged on the support pipe column 2, the lifting driving screw 3 is vertically and rotatably arranged, and the lifting sliding sleeve 4 is in threaded fit with the lifting driving screw 3; the lifting driving motor 5 is used for driving the lifting driving screw 3 to rotate; the transfer driving mechanism is arranged on the lifting sliding sleeve 4. The vertical height can be adjusted by utilizing the threaded fit of the lifting sliding sleeve 4 and the lifting driving screw 3, so that the requirements of different working heights of the rotary driving mechanism are met.

Further, two bar-shaped holes 9 are formed in the support pipe column 2, the lifting driving screw 3 is vertically and rotatably arranged in the support pipe column 2, lifting driving blocks meshed with the lifting driving screw 3 are slidably arranged in the support pipe column 2, the lifting driving blocks extend out of the bar-shaped holes 9 and then are fixed on the inner wall of the lifting sliding sleeve 4, and the lifting sliding sleeve 4 and the lifting driving screw 3 are in threaded fit through the lifting driving blocks, so that stable lifting driving can be achieved, and rotation limitation of the lifting sliding sleeve 4 can be achieved through cooperation with the bar-shaped holes 9.

Further, the transferring driving mechanism comprises a rotary supporting sleeve 11, an overhanging beam 12 and a transferring driving motor 7; the rotary supporting sleeve 11 is rotatably arranged on the lifting sliding sleeve 4, the transfer driving motor 7 drives the rotary supporting sleeve 11 to rotate through a worm gear mechanism, specifically, the end part of an output shaft of the transfer driving motor 7 is in butt joint with the transfer driving worm 8, and the transfer driving worm wheel 6 meshed with the transfer driving worm 8 is arranged on the rotary supporting sleeve 11; the transfer driving motor 7 is arranged on the side edge of the lifting sliding sleeve 4 through a motor bracket; the cantilever beam 12 is fixedly mounted on the rotary support sleeve 11, and the rotary driving mechanism is mounted on the cantilever end of the cantilever beam 12. The rotary support sleeve 11 is utilized for rotary installation, so that the cantilever beam 12 can be conveniently rotated horizontally, the integral horizontal transfer of the rotary driving mechanism is realized, and the coated workpiece 45 is transferred to the upper part of the feeding side of the steel mesh conveying belt; by utilizing the cooperation of the transferring driving worm 8 and the transferring driving worm wheel 6, the rotary driving of the rotary supporting sleeve 11 can be realized, and the locking after the rotary positioning can be realized.

Further, the rotary driving mechanism includes a rotary driving motor 13, a rotary driving shaft 17, a U-shaped frame 15, and a steel mesh drum 18; the upper end of the rotary driving shaft 17 is rotatably mounted on the overhanging end part of the overhanging beam 12, the rotary driving motor 13 drives the rotary driving shaft 17 to rotate through a sprocket transmission mechanism, specifically, a rotary driving gear is mounted on the end part of an output shaft of the rotary driving motor 13, a rotary driven gear is arranged on the rotary driving shaft 17, and the rotary driving gear drives the rotary driven gear to rotate through a rotary driving chain 14; the lower end of the rotary driving shaft 17 is fixed in the middle of the upper side frame of the U-shaped frame 15; the lower ends of the two vertical frames of the U-shaped frame 15 are respectively hinged at the bisection points of the bottom edge of the steel mesh tube 18; one hand-screwed bolt 16 is installed on two vertical frames of the U-shaped frame 15 in a penetrating threaded screwing mode, and the end portions of the two hand-screwed bolts 16 are respectively inserted into positioning pin holes at the bisection points of the top edge of the steel mesh drum 18. The U-shaped frame 15 is utilized to facilitate the hinged installation of the steel mesh drum 18, so that after the steel mesh drum 18 is transported to the feeding side of the steel mesh conveyor belt, a coated workpiece 45 in the steel mesh drum 18 is poured onto the steel mesh conveyor belt by unlocking the hand-screwed bolts 16; the U-shaped frame 15 and the steel net drum 18 are driven to rotate by the rotary driving shaft 17, so that the workpiece 45 is lifted into the spin-drying drum 19 for spin-drying after being coated; the steel mesh drum 18 can be locked in a tilting manner by matching the hand-screwed bolts 16 with the positioning pin holes, so that the stability of the steel mesh drum 18 during coating and spin-drying is ensured.

Further, the coating mechanism comprises a spin-drying drum 19 and a liquid storage drum 10; the spin-drying tube 19 is arranged above the liquid storage tube 10, the bottom of the spin-drying tube 19 is communicated with the top of the liquid storage tube 10, and the steel mesh tube 18 can descend into the liquid storage tube 10 for coating; the top of the spin-drying drum 19 is provided with an access window.

Further, the support pipe column 2 and the liquid storage barrel 10 are both arranged on the support bottom plate 1, so that the stability of installation can be enhanced; the upper part of the liquid storage barrel 10 is communicated with a liquid supplementing pipe 20, and the lower part of the liquid storage barrel 10 is communicated with a liquid discharging pipe 21, so that the coating liquid in the liquid storage barrel 10 is convenient to replace.

Further, the heating mechanism comprises a height adjusting unit, each upper-layer electric heating unit and each lower-layer electric heating unit; each lower-layer electric heating unit is arranged in the heat-preserving shell and is positioned below the steel mesh conveyer belt; each upper electric heating unit is suspended in the heat-preserving shell through the height adjusting unit and is positioned above the steel mesh conveyer belt; the height adjusting unit is used for synchronously adjusting the heights of the upper-layer electric heating units. The upper and lower sides of the workpiece 45 can be synchronously heated and baked by utilizing each upper-layer electric heating unit and each lower-layer electric heating unit, so that the heating performance of the workpiece 45 is ensured; the height of each upper-layer electric heating unit can be adjusted by the height adjusting unit, so that each upper-layer electric heating unit can be heated close to the workpiece 45, and the heating effect is enhanced.

Further, the height adjusting unit includes an adjusting driving motor 37 and respective elevating driving assemblies; each lift drive assembly includes a lift drive shaft 32 and a lift drive cable 34; the lifting driving shafts 32 are rotatably arranged in the heat-insulating shell, one end shaft head extends out of the heat-insulating shell, and synchronous rotation transmission is realized between adjacent lifting driving shafts 32 through a transmission chain wheel mechanism, so that synchronous lifting driving of each upper-layer electric heating unit is realized, and particularly, a group of synchronous gears are arranged on the end parts of the lifting driving shafts 32, and the adjacent synchronous gears are synchronously driven in rotation through a synchronous chain 35; the adjusting driving motor 37 is used for driving one of the lifting driving shafts 32 to rotate, specifically, an adjusting driving worm 38 is arranged at the end part of an output shaft of the adjusting driving motor 37 in a butt joint manner, an adjusting driving worm wheel 36 is arranged at the end part of one of the lifting driving shafts, and the adjusting driving worm 38 and the adjusting driving worm wheel 36 are in meshed transmission, so that not only can the rotation driving of the lifting driving shaft 32 be realized, but also the positioning locking of the lifting driving shaft 32 can be realized; a steel rope reel 33 is fixedly arranged on the lifting driving shaft 32, the lower end of the lifting driving steel rope 34 is fixed on the corresponding upper-layer electric heating unit, and the upper end is fixed on the steel rope reel 33 at the corresponding position.

Further, the upper electric heating unit comprises a heat insulation column 28, a heating cover 30 and each upper electric heating tube 31; the upper end of the heat insulation column 28 extends out of the top of the heat insulation shell through a lifting window 27 at the top of the heat insulation shell, and the lower end of the heat insulation column is fixedly arranged at the center of the top of the heating cover 30; each upper-layer electric heating tube 31 is arranged in the lower-side cover opening of the heating cover 30 in a distributed manner, and the wiring end of each upper-layer electric heating tube 31 extends out of the heat insulation shell from the inside of the heat insulation column 28. The downward radiation performance of each upper electrothermal tube 31 can be further enhanced by the heating mantle 30.

Furthermore, when the system works, a control cabinet is selected and provided with a control handle, so that the lifting driving motor 5, the transferring driving motor 7, the rotating driving motor 13, the adjusting driving motor 37 and the conveying driving motor 44 can be driven and controlled, and the hardware circuits and the control software of the control cabinet and the control handle are integrated by adopting the prior art and are not the inventiveness of the utility model.

Further, an upper junction box 29 is arranged at the upper end of the thermal insulation column 28, and the wiring terminals of each upper electrothermal tube 31 are located in the upper junction box 29, so that the safety of the wiring terminals can be effectively enhanced.

Further, the lower electric heating unit comprises a lower electric heating tube 40 and a lower junction box 26; the heating end of the lower electrothermal tube 40 extends into the heat-preserving shell and is positioned below the steel mesh conveyer belt; the wiring terminal of lower electrothermal tube 40 stretches out of the heat preservation casing, and installs in lower terminal box 26, can strengthen the security of wiring terminal.

Further, the insulation housing includes an outer tunnel housing 22, an inner tunnel housing 24, and respective support legs 25; the inner tunnel type shell 24 is arranged in the outer tunnel type shell 22, and a heat preservation cotton layer 23 is filled between the inner tunnel type shell 24 and the outer tunnel type shell 22; the support legs 25 are fixedly mounted on the bottom of the outer tunnel shell 22. The heat insulation performance can be effectively enhanced by utilizing the heat insulation cotton layer 23, the energy loss is reduced, and the heating power consumption is reduced.

Further, the steel mesh conveyor belt includes a conveyor driving motor 44, a steel mesh belt 43, two conveyor driving rollers 41, and two side strip plates 39; the two side strip plates 39 are fixedly installed on the heat-insulating shell in a penetrating manner, the two conveying driving rollers 41 are respectively and rotatably installed between the two end parts of the two side strip plates 39, and the conveying driving motor 44 is used for driving the conveying driving rollers 41 to rotate; a support roller 42 is also rotatably mounted between the two side strip plates 39; the steel mesh belt 43 is wound on the two conveying driving rollers 41, and the supporting rollers 42 are supported on the upper layer of the steel mesh belt 43, so that the stability of the workpiece 45 in the transportation process is ensured; the steel mesh belt 43 is utilized for conveying, so that the workpiece 45 can be supported, the radiation of heating air flow can be facilitated, and the heating effect of the workpiece 45 is ensured.

When the coating system disclosed by the utility model works, the lifting driving motor 5 works to lift the steel mesh drum 18 from the liquid storage drum 10 into the spin-drying drum 19, then the rotating driving motor 13 works to drive the steel mesh drum 18 to rotate, the spin-drying operation is carried out on the workpiece 45 in the steel mesh drum 18, after spin-drying is stopped, the lifting driving motor 5 and the transferring driving motor 7 work to transfer the steel mesh drum 18 to the upper part of the feeding side of the steel mesh conveyor belt, the worker opens two hand-screwing bolts 16, slowly pours the workpiece 45 in the steel mesh drum 18 onto the steel mesh belt 43, the worker locks the hand-screwing bolts 16 again to enable the steel mesh drum 18 to be stationary, and then the lifting driving motor 5 and the transferring driving motor 7 work to transfer the steel mesh drum 18 to the feeding side, and then the worker loads the workpiece 45 into the steel mesh drum 18 for coating; the steel mesh belt 43 continuously conveys the workpiece 45 into the heat-insulating shell, and the upper electric heating pipes 31 and the lower electric heating pipes 40 heat the workpiece 45, so that the surface baking and curing of the workpiece 45 are completed.

As described above, although the present utility model has been shown and described with reference to certain preferred embodiments, it is not to be construed as limiting the utility model itself. Various changes in form and details may be made therein without departing from the spirit and scope of the utility model as defined by the appended claims.

Claims

1. A coating system characterized by: comprises a coating device and a tunnel heating device; the coating device comprises a lifting driving mechanism, a transferring driving mechanism, a rotating driving mechanism and a coating mechanism; the tunnel type heating device comprises a heat preservation shell, a steel mesh conveying belt and a heating mechanism; the steel mesh conveyor belt is arranged on the heat-preserving shell in a penetrating way, the heating mechanism is arranged in the heat-preserving shell, the steel mesh conveyor belt conveys the workpiece (45) into the heat-preserving shell, and the heating mechanism heats and toasts the workpiece (45); the transfer driving mechanism is arranged on the lifting driving mechanism, and the lifting driving mechanism drives the transfer driving mechanism to move up and down; the rotary driving mechanism is arranged on the transferring driving mechanism, and the transferring driving mechanism drives the rotary driving mechanism to horizontally transfer between the coating mechanism and the steel mesh conveying belt; the rotary driving mechanism is used for loading the workpiece (45) into and out of the coating mechanism to carry out coating treatment and spin-drying the coated workpiece (45).

2. The coating system of claim 1, wherein: the lifting driving mechanism comprises a supporting pipe column (2), a lifting driving motor (5), a lifting sliding sleeve (4) and a lifting driving screw rod (3); the lifting sliding sleeve (4) is slidably arranged on the supporting pipe column (2), the lifting driving screw (3) is vertically and rotatably arranged, and the lifting sliding sleeve (4) is in threaded fit with the lifting driving screw (3); the lifting driving motor (5) is used for driving the lifting driving screw (3) to rotate; the transfer driving mechanism is arranged on the lifting sliding sleeve (4).

3. The coating system of claim 2, wherein: the transferring driving mechanism comprises a rotary supporting sleeve (11), an overhanging beam (12) and a transferring driving motor (7); the rotary supporting sleeve (11) is rotatably arranged on the lifting sliding sleeve (4), and the transferring driving motor (7) drives the rotary supporting sleeve (11) to rotate through a worm and gear mechanism; the cantilever beam (12) is fixedly arranged on the rotary supporting sleeve (11), and the rotary driving mechanism is arranged on the cantilever end part of the cantilever beam (12).

4. A coating system according to claim 3, wherein: the rotary driving mechanism comprises a rotary driving motor (13), a rotary driving shaft (17), a U-shaped frame (15) and a steel mesh drum (18); the upper end of the rotary driving shaft (17) is rotatably arranged on the overhanging end part of the overhanging beam (12), and the rotary driving motor (13) drives the rotary driving shaft (17) to rotate through a sprocket transmission mechanism; the lower end of the rotary driving shaft (17) is fixed in the middle of the upper side frame of the U-shaped frame (15); the lower ends of two vertical frames of the U-shaped frame (15) are respectively hinged at the bisection points of the bottom edge of the steel mesh drum (18); two vertical frames of the U-shaped frame (15) are respectively provided with a hand-screwed bolt (16) in a penetrating and threaded manner, and the end parts of the two hand-screwed bolts (16) are respectively inserted into positioning pin holes at the bisection points of the top edge of the steel mesh cylinder (18).

5. The coating system of claim 1, wherein: the coating mechanism comprises a spin-drying tube (19) and a liquid storage tube (10); the spin-drying tube (19) is arranged above the liquid storage tube (10), and the bottom of the spin-drying tube (19) is communicated with the top of the liquid storage tube (10); the top of the spin-drying tube (19) is provided with an inlet and outlet window.

6. The coating system of claim 1, wherein: the heating mechanism comprises a height adjusting unit, each upper-layer electric heating unit and each lower-layer electric heating unit; each lower-layer electric heating unit is arranged in the heat-preserving shell and is positioned below the steel mesh conveyer belt; each upper electric heating unit is suspended in the heat-preserving shell through the height adjusting unit and is positioned above the steel mesh conveyer belt; the height adjusting unit is used for synchronously adjusting the heights of the upper-layer electric heating units.

7. The coating system of claim 6, wherein: the height adjusting unit comprises an adjusting driving motor (37) and lifting driving components; each lift drive assembly includes a lift drive shaft (32) and a lift drive cable (34); the lifting driving shafts (32) are rotatably arranged in the heat-insulating shell, one end shaft head extends out of the heat-insulating shell, and synchronous rotation transmission is realized between adjacent lifting driving shafts (32) through a transmission chain wheel mechanism; the adjusting driving motor (37) is used for driving one lifting driving shaft (32) to rotate; a steel rope reel (33) is fixedly arranged on the lifting driving shaft (32), the lower end of the lifting driving steel rope (34) is fixed on the corresponding upper-layer electric heating unit, and the upper end of the lifting driving steel rope is fixed on the steel rope reel (33) at the corresponding position.

8. The coating system of claim 6, wherein: the upper-layer electric heating unit comprises a heat insulation column (28), a heating cover (30) and each upper-layer electric heating tube (31); the upper end of the heat insulation column (28) extends out of the top of the heat insulation shell in a penetrating way, and the lower end of the heat insulation column is fixedly arranged at the center of the top of the heating cover (30); the upper electric heating pipes (31) are distributed and arranged in the lower cover opening of the heating cover (30), and the wiring ends of the upper electric heating pipes (31) extend out of the heat insulation shell from the inside of the heat insulation column (28).