Paint constant-temperature heating device

Abstract

The invention discloses a paint constant-temperature heating device which comprises a box body, a mounting bracket is welded in the box body, two groups of heating pipes are mounted on the mounting bracket, a temperature detection probe is mounted on the inner wall of one side of the box body, and a temperature controller and a control box are mounted on the outer side surface of the box body. A magnetic stirring assembly is arranged at the bottom of the box body, cover plates are hinged to the two sides of the upper end of the box body, a partition plate and a sealing assembly are arranged in the box body, and a contactor, a time relay and a power module are arranged in the control box. The technical key points are as follows: a water bath heating mode is adopted to replace a conventional heating fan heating mode, as the heat conduction efficiency of water is higher than that of air, the problem of low-temperature thickening of paint can be effectively solved after the constant-temperature heating device is used, and compared with time consumption and power consumption of air heating, the heating efficiency of the water bath heating mode is effectively improved; therefore, power consumption is saved, and paint heating cost is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of paint heating, and particularly relates to a paint constant-temperature heating device. Background Art

[0002] Paint is a chemical mixture coating, usually mainly composed of resin, oil or emulsion, with or without pigments and fillers, and corresponding additives are added, and it is a viscous liquid prepared with organic solvents or water. Its main function is to firmly cover the surface of an object, serving for protection, decoration, marking and other special purposes. Paints can be classified into various types according to their usage methods and components, such as water-based paints, oil-based paints, latex paints, etc. The viscosity of paint changes significantly with temperature. At low temperatures, too high viscosity will lead to poor fluidity, making it difficult to pump out and spray evenly. Heating can reduce the viscosity and make the paint easier to operate, especially suitable for fine spraying processes. In cold weather or low-temperature environments, paint is prone to thickening, and by heating, its fluidity can be quickly restored to ensure construction efficiency. In order to avoid low-temperature thickening of paint and eliminate internal crystallization in a certain special paint, the paint needs to be heated and maintained within a constant temperature range to meet the technological requirements of paint construction.

[0003] Currently, the heating method for paint mostly uses a heating fan to heat the air, thereby increasing the temperature of the paint storage space and then increasing the temperature of the paint. This heating method has a long heating time, low heating efficiency, and high power consumption; moreover, using a heating fan to heat paint can only avoid low-temperature thickening of paint and cannot eliminate internal crystallization in the paint, having certain limitations, and the paint is prone to uneven heating. Summary of the Invention

[0004] Technical problems to be solved: Aiming at the deficiencies of the prior art, the present invention provides a paint constant-temperature heating device, which uses a water bath heating method to replace the conventional heating fan heating. Since the heat conduction efficiency of water is higher than that of air, after using the constant-temperature heating device, the problem of low-temperature thickening of paint can be effectively solved. Comparing the heating time and power consumption of air heating, the heating efficiency of the water bath heating method has been effectively improved, thereby saving power consumption and reducing the paint heating cost, and solving the technical problems mentioned in the background art.

[0005] Technical solutions: To achieve the above object, the present invention is realized through the following technical solutions: A paint constant temperature heating device includes a box body. An installation bracket is welded inside the box body, and a heating pipe is installed on the installation bracket. There are two groups of heating pipes. A temperature detection probe is installed on one inner wall of the box body. A temperature controller and a control box are installed on the outer side of the box body. A magnetic stirring component is arranged at the bottom of the box body. Covers are hinged on both sides at the upper end of the box body. A partition board and a sealing component are arranged inside the box body, and the sealing component is located above the partition board. Multiple groups of notches are opened on the partition board. The control box is internally provided with a contactor, a time relay and a power supply module. The PT100 temperature detection probe converts the water temperature signal into an electrical signal and transmits it to the temperature controller. The temperature controller compares the water temperature signal with the internally set temperature, and adjusts and outputs a control signal through internal PID data. This control signal controls two groups of contactors. The contactors supply the 380V main power to the two groups of heating pipes to heat the water, and can stably control the temperature at the set temperature of 65°C.

[0006] In a possible implementation manner, the magnetic stirring component includes a fixed box and a stirring rotor. A motor is installed inside the fixed box. The output shaft of the motor is fixedly connected to a magnetic steel. The stirring rotor is located at the bottom end inside the box body, and the magnetic steel is located at the bottom end outside the box body. When the motor of the magnetic stirring component works, it drives the magnetic steel at one end to rotate. Utilizing the characteristics of the same-sex repulsion and opposite-sex attraction of the magnetic field, when the magnetic steel makes a rotational motion driven by the motor, the stirring rotor is affected by the rotating magnetic field and then makes a circular motion inside the box body. The circular motion of the stirring rotor can effectively stir the heating water inside the box body, force the convection of the liquid, reduce the temperature gradient, and improve the heating uniformity.

[0007] In a possible implementation manner, mounting lugs are welded and fixed on both sides of the fixed box. Mounting holes are opened on the mounting lugs. The fixed box is fixedly connected to the box body through screws. The motor is installed and fixed inside the fixed box, and the fixed box is installed and fixed at the bottom of the box body.

[0008] In a possible implementation manner, there are two groups of covers. Handles are welded and fixed on both groups of covers. A safety valve is installed on one of the covers. One end of the cover is hinged to the box body. After placing the paint bucket inside the box body, if the height of the paint bucket does not exceed the height of the box body, the two groups of covers can be smoothly closed at this time. When heating the paint bucket, the two groups of covers are relied on to seal the box body to reduce heat loss and save energy consumption.

[0009] In a possible implementation manner, rollers are installed at the corners of the lower end face of the box body, and the rollers are fixedly connected to the box body through screws, which can quickly move the overall heating device to a designated position for use, facilitate the position adjustment of the overall heating device, and facilitate transportation.

[0010] In a possible implementation, a drain pipe is provided on the lower end surface of the box body, and a valve is installed on the drain pipe. When the valve is opened, the passage of the drain pipe is opened, and the water body inside the box body can be discharged through the drain pipe. When the valve is closed, the passage of the drain pipe is closed.

[0011] In a possible implementation, limiting plates are fixedly welded on the inner walls on both sides of the box body. The limiting plates are used to support the partition plate. The position of the partition plate is higher than that of the heating pipe and the stirring rotor. Avoidance grooves are provided on the partition plate for avoiding the temperature detection probe. The partition plate can be moved in and out. The paint bucket is supported by the partition plate, and the heating water body overflows through multiple sets of notches to perform water bath heating on the paint bucket.

[0012] In a possible implementation, both the box body and the cover plate include a first steel plate and a second steel plate. A polyurethane heat insulation layer is provided between the first steel plate and the second steel plate. The steel plate and the polyurethane heat insulation layer together form the thin-walled structure of the box body and the cover plate structure. Both the box body and the cover plate have the function of heat insulation.

[0013] In a possible implementation, the sealing assembly includes a fixed frame. The fixed frame is fixedly arranged on the inner wall of the box body. An elastic layer is fixedly connected to the inner side surface of the fixed frame. An elastic ring is fixedly connected to the inner circle of the elastic layer. When placing the paint bucket, both the elastic layer and the elastic ring undergo corresponding elastic deformations, so that the elastic ring on the inner circle closely adheres to the outer side surface of the paint bucket, forming a sealed structure for the water bath heating chamber of the box body. When the height of the paint bucket is higher than the height of the box body, the cover plate at this time cannot be normally closed, and the sealing assembly is relied on to seal the water bath heating chamber.

[0014] In a possible implementation, an opening is formed in the elastic ring of the sealing assembly. The paint bucket is placed into the box body through the opening of the sealing assembly and placed on the partition plate.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. The present invention adopts the water bath heating method to replace the conventional heating fan heating, which is more energy-saving. The paint constant temperature heating device can stably control the temperature at the set temperature of 65°C, and the temperature deviation is within 1°C. It can effectively eliminate the internal crystallization of a certain special paint and reach the best process conditions for paint use. Since the heat conduction efficiency of water is higher than that of air, after using the constant temperature heating device, the problem of paint low-temperature thickening can be effectively solved. Compared with the time-consuming and power consumption of air heating, the heating efficiency of the water bath heating method has been effectively improved, thereby saving power consumption and reducing the paint heating cost.

[0016] 2. The present invention is provided with a magnetic stirring component at the bottom of the box body. When the motor of the magnetic stirring component works, it drives the magnetic steel at one end to rotate. By utilizing the characteristics of like poles repelling and opposite poles attracting in the magnetic field, when the magnetic steel makes a rotational movement driven by the motor, the stirring rotor is affected by the rotating magnetic field and then makes a circular motion inside the box body. The circular motion of the stirring rotor can effectively stir the heating water in the box body, force the convection of the liquid, reduce the temperature gradient, improve the heating uniformity, and thus achieve uniform heating of the paint, avoiding local overheating.

[0017] 3. After the paint bucket is placed inside the box body of the present invention, if the height of the paint bucket does not exceed the height of the box body, the two groups of cover plates can be smoothly closed at this time. When heating the paint bucket, the box body is sealed by relying on the two groups of cover plates. When the height of the paint bucket is higher than the height of the box body, the cover plates cannot be normally closed at this time, and the water bath heating chamber is sealed by relying on the sealing component, reducing heat loss and saving energy consumption.

[0018] 4. The steel plate and the polyurethane heat insulation layer of the present invention jointly constitute the thin-wall structure of the box body and the cover plate structure. Both the box body and the cover plate have the function of heat insulation. The polyurethane heat insulation layer reduces heat loss by virtue of its low thermal conductivity, thereby reducing heat loss and saving energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above description is only an overview of the technical solution of the present invention. In order to be able to understand the technical means of the present invention more clearly and implement it in accordance with the content of the description, the following describes in detail with reference to the preferred embodiments of the present invention and the accompanying drawings.

[0020] Figure 1 It is a schematic diagram of the overall structure of the top view of the present invention; Figure 2 It is a schematic diagram of the overall structure of the bottom view of the present invention; Figure 3 It is a schematic diagram of the top view structure of the present invention after removing the sealing component; Figure 4 It is a schematic diagram of the top view structure of the present invention after removing the sealing component and the partition; Figure 5 It is a cross-sectional view of the present invention; Figure 6 It is for Figure 5 The partial enlarged view of area A in Figure 7 It is a schematic diagram of the structure of the magnetic stirring component of the present invention; Figure 8 It is a schematic diagram of the structure of the partition of the present invention; Figure 9 It is a schematic diagram of the structure of the box body and the cover plate of the present invention; Figure 10This is a schematic structural diagram of the sealing component of the present invention.

[0021] In the figure: 1, box body; 2, heating pipe; 3, temperature detection probe; 4, temperature controller; 5, control box; 6, cover plate; 7, magnetic stirring component; 8, partition plate; 9, sealing component; 11, roller; 12, limiting plate; 13, drain pipe; 14, valve; 15, first steel plate; 16, second steel plate; 17, polyurethane insulation layer; 61, safety valve; 62, handle; 71, fixed box; 72, motor; 73, magnetic steel; 74, stirring rotor; 75, mounting lug; 81, notch; 91, fixed frame; 92, elastic layer; 93, elastic ring; 94, opening. Specific embodiments

[0022] In the embodiment of the present application, a paint constant temperature heating device is provided, which uses the water bath heating method to replace the conventional heating fan heating. Since the heat conduction efficiency of water is higher than that of air, after using the constant temperature heating device, the problem of paint low temperature thickening can be effectively solved. Comparing the time consumption and power consumption of air heating, the heating efficiency of the water bath heating method has been effectively improved, thereby saving power consumption and reducing the paint heating cost, and solving the technical problems mentioned in the background art.

[0023] The technical solution in the embodiment of the present application is to solve the problems in the above background art, and the general idea is as follows: Embodiment 1: Please refer to Figures 1-10 , the present invention provides a technical solution: a paint constant temperature heating device, including a box body 1, an installation bracket is welded inside the box body 1, and a heating pipe 2 is installed on the installation bracket. There are two groups of heating pipes 2. A temperature detection probe 3 is installed on one inner wall of the box body 1. The temperature detection probe 3 monitors the water temperature in real time and collects the water temperature. A temperature controller 4 and a control box 5 are installed on the outer side surface of the box body 1. The temperature is precisely controlled through the temperature controller 4. A magnetic stirring component 7 is arranged at the bottom of the box body 1. The heating water is stirred through the magnetic stirring component 7 to improve its heating effect and avoid local overheating. Both sides of the upper end of the box body 1 are hinged with a cover plate 6. A partition plate 8 and a sealing component 9 are arranged inside the box body 1, and the sealing component 9 is located above the partition plate 8. Multiple notches 81 are opened on the partition plate 8, and the multiple notches 81 are evenly distributed at intervals. The heating water overflows through the multiple notches 81. The partition plate 8 is used to support the paint bucket. The control box 5 is internally provided with a contactor, a time relay and a power supply module. The power supply module is a 380V main power supply. The temperature detection probe 3, the temperature controller 4, the contactor, the time relay and the power supply module are electrically connected.

[0024] The heating tube 2 is selected as 380V 12KW, made of 304 stainless steel, and used as a heating element. The main circuit is selected with a 63A three-phase leakage protection device and a CHINT 6511 contactor. The heating time control selects a time relay of Omron H3Y series. The PT100 temperature detection probe 3 is used to collect the water temperature. The Huifeng XMTD7000 intelligent PID temperature controller 4 is selected. The precise control of the temperature is achieved by setting the PID parameters. In order to achieve temperature constant control, it is necessary to adjust the PID parameters of the temperature controller 4 according to the actual situation. P - proportional adjustment, which generates the response speed and strength. If the setting is too small, the response is slow; if it is too large, oscillation will occur. It is the basis of the I and D parameters. First, set I and D to 0, and increase P from small to large until oscillation occurs in the output of the temperature controller 4, and then gradually reduce the parameters until the output is stable. At this time, the P parameter is fixed at 25. I - integral adjustment, which eliminates the deviation and improves the accuracy under the system error and external force, and has a steady-state output. At the same time, it will also increase the response speed and generate overshoot. If the parameter setting is too large, oscillation will occur. The adjustment of I is opposite to that of P. The parameter is adjusted from large to small until the output is stable. Finally, the I parameter is 0.2. D - derivative adjustment, which suppresses overshoot and oscillation. If the parameter is too small, overshoot cannot be suppressed; if it is too large, the response speed will be slowed down. The adjustment of D is similar to that of I. The parameter is adjusted from large to small until both oscillation and overshoot are controlled within an appropriate range. The final data is 0.6. When heating, the temperature is stable at 64.5 - 65.2°C, meeting the process requirements.

[0025] Heating water is pre-introduced into the box body 1. The paint bucket is directly placed in the box body 1, and the paint bucket is heated by the water bath method. The internal paint is heated through the paint bucket. The PT100 temperature detection probe 3 converts the water temperature signal into an electrical signal and transmits it to the temperature controller 4. The temperature controller 4 compares the water temperature signal with the internal set temperature, and adjusts and outputs a control signal through the internal PID data. This control signal controls two groups of contactors. The contactors supply the 380V main power supply to two groups of heating tubes 2 to heat the water. In the heating-up stage, the temperature controller 4 controls the two groups of heating tubes 2 to heat simultaneously. In the constant-temperature stage, the temperature controller 4 only needs to control one group of heating tubes 2 for constant-temperature heating. The paint constant-temperature heating device can stably control the temperature at the set temperature of 65°C, and the temperature deviation is within 1°C, which can effectively eliminate the internal crystallization of a certain special paint and reach the best process conditions for paint use.

[0026] In some examples, the magnetic stirring assembly 7 includes a fixed box 71 and a stirring rotor 74. The heating water is stirred by driving the stirring rotor 74 to rotate. An electric motor 72 is installed inside the fixed box 71. The output shaft of the electric motor 72 is fixedly connected to a magnetic steel 73. The stirring rotor 74 is located at the bottom end inside the box body 1, and the magnetic steel 73 is located at the bottom end outside the box body 1.

[0027] At the bottom of the box body 1, there is a magnetic stirring rotor 74 placed. When the motor 72 works, it drives the magnetic steel 73 at one end to rotate. By using the characteristics of the repulsion of like poles and attraction of opposite poles in the magnetic field, when the magnetic steel 73 makes a rotational motion driven by the motor 72, the stirring rotor 74 is affected by the rotating magnetic field and then makes a circular motion inside the box body 1. The circular motion of the stirring rotor 74 can effectively stir the heating water body inside the box body 1, force the convection of the liquid, reduce the temperature gradient, improve the heating uniformity, and then achieve uniform heating of the paint, avoiding the phenomenon of local overheating.

[0028] In some examples, mounting lugs 75 are welded and fixed on both sides of the fixed box 71. Mounting holes are provided on the mounting lugs 75. The fixed box 71 is fixedly connected to the box body 1 through screws. The motor 72 is installed and fixed inside the fixed box 71. The fixed box 71 is installed and fixed at the bottom of the box body 1. The magnetic stirring assembly 7 and the box body 1 are of a detachable structure, which is convenient for the maintenance of the magnetic stirring assembly 7.

[0029] In some examples, there are two groups of cover plates 6. Handles 62 are welded and fixed on both groups of cover plates 6. A safety valve 61 is installed on one group of cover plates 6. One end of the cover plate 6 is hinged to the box body 1, and the cover plate 6 can rotate along the hinged part.

[0030] After the paint bucket is placed inside the box body 1, if the height of the paint bucket does not exceed the height of the box body 1, the two groups of cover plates 6 can be smoothly closed at this time. When heating the paint bucket, the two groups of cover plates 6 are relied on to seal the box body 1 to reduce heat loss and save energy consumption. The setting of the handles 62 facilitates the opening and closing actions of the two groups of cover plates 6. During the heating process of water, the increase in temperature will cause volume expansion and partial vaporization. The safety valve 61 can perform safe automatic pressure relief to improve the safety during the paint heating process.

[0031] In some examples, rollers 11 are installed at the corners of the lower end face of the box body 1, and the rollers 11 are fixedly connected to the box body 1 through screws.

[0032] There are four groups of rollers 11. The four groups of rollers 11 are used as feet. The setting of the rollers 11 facilitates the movement of the overall heating device, can quickly move the overall heating device to the designated position for use, is convenient for adjusting the position of the overall heating device, and is convenient for transportation.

[0033] In some examples, a drain pipe 13 is provided on the lower end face of the box body 1. A valve 14 is installed on the drain pipe 13. When the valve 14 is opened, the passage of the drain pipe 13 is opened, and the water body inside the box body 1 can be discharged through the drain pipe 13. When the valve 14 is closed, the passage of the drain pipe 13 is closed, and the water body inside the box body 1 cannot be discharged. The water body can be discharged through the drain pipe 13 to replace the heating water body, and the replacement is convenient.

[0034] In some examples, limiting plates 12 are fixedly welded on the inner walls on both sides of the box body 1, and the limiting plates 12 are used to support the partition plate 8.

[0035] The position of the partition plate 8 is higher than that of the heating pipe 2 and the stirring rotor 74. As Figure 8 shown, an avoidance groove is formed in the partition plate 8 for avoiding the temperature detection probe 3. The partition plate 8 can be moved in and out. When heating the paint, first place the partition plate 8. The two groups of limiting plates 12 support the partition plate 8 and limit the height of the partition plate 8. Then place the paint bucket on the partition plate 8. The heating water body overflows through multiple groups of notches 81 to perform water bath heating on the paint bucket, and heat the internal paint of the paint bucket through the paint bucket.

[0036] By adopting the above technical solutions: Adopting the water bath heating method to replace the conventional heating fan heating is more energy-saving. The paint constant temperature heating device can stably control the temperature at the set temperature of 65 °C, and the temperature deviation is within 1 °C, which can effectively eliminate the internal crystallization of a certain special paint and reach the best process conditions for paint use.

[0037] Since the heat conduction efficiency of water is higher than that of air, after using the constant temperature heating device, the problem of low-temperature thickening of the paint can be effectively solved. Compared with the heating time and power consumption of air heating, the heating efficiency of the water bath heating method has been effectively improved, thereby saving power consumption and reducing the paint heating cost.

[0038] A magnetic stirring assembly 7 is additionally provided at the bottom of the box body 1. When the motor 72 of the magnetic stirring assembly 7 works, it drives the magnetic steel 73 at one end to rotate. When the magnetic steel 73 makes a rotational motion under the drive of the motor 72, the stirring rotor 74 is affected by the rotating magnetic field and then makes a circular motion in the box body 1. The circular motion of the stirring rotor 74 can effectively stir the heating water body in the box body 1, force the convection of the liquid, reduce the temperature gradient, improve the heating uniformity, and thus realize the uniform heating of the paint and avoid the phenomenon of local overheating.

[0039] After placing the paint bucket inside the box body 1, if the height of the paint bucket does not exceed the height of the box body 1, the two groups of cover plates 6 can be smoothly closed at this time. When heating the paint bucket, rely on the two groups of cover plates 6 to seal the box body 1 to reduce heat loss and save energy consumption.

[0040] Embodiment 2: Based on Embodiment 1, this embodiment introduces the specific structures of the box body 1 and the cover plate 6 in a paint constant temperature heating device. The box body 1 and the cover plate 6 both include a first steel plate 15 and a second steel plate 16, and a polyurethane heat insulation layer 17 is arranged between the first steel plate 15 and the second steel plate 16.

[0041] Both the box body 1 and the cover plate 6 are of double-layer steel plate structure, and a polyurethane heat-insulating layer 17 is arranged in the interlayer of the double-layer steel plates. The steel plates and the polyurethane heat-insulating layer 17 together constitute the thin-wall structure of the box body 1 and the structure of the cover plate 6. Both the box body 1 and the cover plate 6 have the function of heat preservation. The polyurethane heat-insulating layer 17 reduces the loss of heat by virtue of its low thermal conductivity, thereby saving energy consumption and reducing the paint heating cost.

[0042] Example 3: Based on Example 1 and Example 2, this example introduces the specific structure of the sealing component 9 in a paint constant-temperature heating device. The sealing component 9 includes a fixed frame 91, which is fixedly arranged on the inner wall of the box body 1. The inner side surface of the fixed frame 91 is fixedly connected with an elastic layer 92, and the inner ring of the elastic layer 92 is fixedly connected with an elastic ring 93.

[0043] The elastic layer 92 is made of an elastic material, and the elastic ring 93 is made of an elastic material. When placing the paint bucket, the elastic layer 92 and the elastic ring 93 undergo corresponding elastic deformations, so that the inner elastic ring 93 closely adheres to the outer side surface of the paint bucket, forming a sealed structure for the water bath heating chamber of the box body 1 and reducing the loss of heat. When the height of the paint bucket is higher than the height of the box body 1, the cover plate 6 at this time cannot be normally closed. Rely on the sealing component 9 to seal the water bath heating chamber to reduce heat loss, thereby reducing the paint heating cost.

[0044] In some examples, an opening 94 is formed in the elastic ring 93 of the sealing component 9. The paint bucket is placed into the box body 1 through the opening 94 of the sealing component 9, placed on the partition plate 8, and the box body 1 is used to heat the paint bucket by water bath.

[0045] Finally, it should be noted that: Obviously, the above examples are only examples for clearly explaining the present invention, rather than limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or modifications can be made on the basis of the above description. It is not necessary and impossible to enumerate all the implementation manners here. And the obvious changes or modifications derived therefrom are still within the protection scope of the present invention.

Claims

1. A paint constant temperature heating device, comprising a box body (1), characterized in that: Inside the box body (1), there is a welded installation bracket, and a heating pipe (2) is installed on the installation bracket. There are two groups of the heating pipes (2). A temperature detection probe (3) is installed on one inner wall of the box body (1). A temperature controller (4) and a control box (5) are installed on the outer side of the box body (1). A magnetic stirring assembly (7) is arranged at the bottom of the box body (1). On both sides at the upper end of the box body (1), there are hinged cover plates (6). Inside the box body (1), there are a partition plate (8) and a sealing assembly (9), and the sealing assembly (9) is located above the partition plate (8). Multiple groups of notches (81) are formed on the partition plate (8). Inside the control box (5), there are a contactor, a time relay, and a power supply module.

2. The paint constant-temperature heating device according to claim 1, characterized in that: The magnetic stirring assembly (7) includes a fixed box (71) and a stirring rotor (74). Inside the fixed box (71), there is an electric motor (72). The output shaft of the electric motor (72) is fixedly connected to a magnetic steel (73). The stirring rotor (74) is located at the bottom end inside the box body (1), and the magnetic steel (73) is located at the bottom end outside the box body (1).

3. The paint constant temperature heating device according to claim 2, characterized in that: On both sides of the fixed box (71), there are welded and fixed installation lugs (75). Installation holes are formed on the installation lugs (75). The fixed box (71) is fixedly connected to the box body (1) through screws.

4. A paint constant temperature heating device according to claim 1, characterized in that: There are two groups of the cover plates (6). On both groups of the cover plates (6), there are welded and fixed handles (62). A safety valve (61) is installed on one of the cover plates (6). One end of the cover plate (6) is hinged to the box body (1).

5. A paint constant temperature heating device according to claim 1, characterized in that: At the corners of the lower end face of the box body (1), there are installed rollers (11), and the rollers (11) are fixedly connected to the box body (1) through screws.

6. The paint constant temperature heating device according to claim 1, characterized in that: A drain pipe (13) is arranged on the lower end face of the box body (1), and a valve (14) is installed on the drain pipe (13).

7. An paint constant temperature heating device according to claim 1, characterized in that: On both inner walls of the box body (1), there are welded and fixed limiting plates (12), and the limiting plates (12) are used to support the partition plate (8).

8. A paint constant temperature heating device according to claim 1, characterized in that: Both the box body (1) and the cover plate (6) include a first steel plate (15) and a second steel plate (16). A polyurethane heat insulation layer (17) is arranged between the first steel plate (15) and the second steel plate (16).

9. The paint constant temperature heating device according to claim 1, wherein: The sealing assembly (9) includes a fixed frame (91). The fixed frame (91) is fixedly arranged on the inner wall of the box body (1). The inner side of the fixed frame (91) is fixedly connected to an elastic layer (92). The inner ring of the elastic layer (92) is fixedly connected to an elastic ring (93).

10. The paint constant-temperature heating device according to claim 9, characterized in that: An opening (94) is formed in the elastic ring (93) of the sealing assembly (9).

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