Paint surface drying equipment and working method thereof

Abstract

The present invention discloses a paint drying equipment, comprising a drying box; a box door arranged at the front of the drying box; a partition plate fixedly installed on the inner wall of the drying box; and a drying component arranged in the drying box, wherein the drying component comprises a hot air flow part and a support part, wherein the air flow is blown by a fan and the air flow is sucked by an air pump, so as to form an air flow with a stable flow direction in the lifting frame, the air flow is heated by an electric heating wire, and the hot air flow is used to exchange heat with the air on the surface of the metal part to achieve drying of the paint surface of the metal part. Because the hot air flow is not blown directly onto the paint surface, there is no need to worry about dust and other particles in the hot air flow being adsorbed by the paint surface, and the drying process is arranged inside the drying box to prevent external flowing air from entering the drying box during the drying process. Secondly, the metal part is covered by the lifting frame, and a balanced inlet and outlet air flow is arranged in the lifting frame, which can also effectively prevent the air in the drying box from entering the lifting frame.

Description

Technical Field

[0001] The present invention relates to the technical field of paint surface drying equipment, in particular to paint surface drying equipment and a working method thereof. Background Art

[0002] Paint is a chemical mixture that can firmly cover the surface of an object for protection, decoration, marking and other special purposes. Spraying paint on metal surfaces is an important step in metal surface treatment. After the paint is sprayed, drying equipment is needed to accelerate the curing speed of the paint on the metal surface.

[0003] Existing Chinese patent CN 219150654 U discloses a paint drying device that uses a fan to blow heat from an electric heating tube through multiple air outlet slots to heat and dry the metal paint surface, thereby evenly heating the metal paint surface and preventing the paint surface from cracking or peeling due to uneven drying.

[0004] However, the above-mentioned paint drying equipment uses hot air to blow and dry the paint surface to achieve the purpose of uniform drying of the paint surface. However, in actual use, the dust-proof net provided therein can only remove dust from the air entering the equipment. When the air is heated and leaves the equipment, it will come into contact with the outside air. The fast-flowing air will drive the dust and other particles in the air to flow together. When the dust and other particles come into contact with the undried paint surface, they will be absorbed by the paint, causing the paint to accumulate dust. Especially after the paint surface is dried, it will be very troublesome to clean the dust and other particles on the paint surface. Summary of the Invention

[0005] The object of the present invention is to provide a paint surface drying equipment and a working method thereof to solve the problems raised in the above background technology.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: a paint drying equipment, comprising a drying box;

[0007] A door provided on the front of the drying box;

[0008] A partition plate fixedly mounted on the inner wall of the drying box;

[0009] And a drying component arranged in the drying box, the drying component includes a hot air flow part and a support part, the hot air flow part is located inside the drying box, a waste heat recovery part is provided outside the hot air flow part, the support part is located on the top of the partition plate, and a heating part is provided outside the support part.

[0010] According to the above technical solution, the hot air flow part includes a cylinder and an air duct, the cylinder is fixedly installed on the top of the drying box, the extended end of the cylinder extends into the drying box, the extended end of the cylinder is fixedly installed with a lifting frame, the air duct is fixedly installed on the top of the drying box, the inner wall of the air duct 314 is fixedly installed with a dustproof net 312, the inner wall of the air duct is fixedly installed with a fan, the air outlet of the fan is connected with an air inlet duct, and the bottom end of the air inlet duct extends into the lifting frame, the inner wall of the lifting frame is fixedly installed with an electric heating wire, the inner wall of the lifting frame is fixedly installed with an air outlet plate, the inner wall of the lifting frame is fixedly installed with an air inlet plate, the electric heating wire, the air outlet plate and the air inlet plate are arranged from right to left, the left inner wall of the lifting frame is connected with an air outlet pipe, the bottom end of the air outlet pipe is connected with a bending pipe, and the right end of the bending pipe is connected with an air suction pump.

[0011] According to the above technical solution, the support part includes a base plate, which is fixedly installed on the top of the partition plate, a guide groove is opened on the top of the base plate, and an I-shaped plate is slidably provided on the inner wall of the guide groove, a support rod is fixedly installed on the top of the I-shaped plate, a rack is fixedly installed on the bottom of the I-shaped plate, the rack is meshed with a gear, and a second rotating shaft is fixedly installed on the inner wall of the gear, the bottom end of the second rotating shaft is rotatably connected to the inner wall of the base plate through a bearing, the second rotating shaft is connected to the first rotating shaft through a pulley set, and the top of the first rotating shaft passes through the inner wall of the base plate through a bearing.

[0012] According to the above technical solution, the heating part includes a guide rail, which is fixedly mounted on the side outer wall of the base plate, a sliding rod is slidingly provided on the inner wall of the guide rail, a heating plate is fixedly mounted on the top of the sliding rod, a heater is fixedly mounted on the right outer wall of the heating plate, the heating end of the heater extends into the heating plate, a motor is fixedly mounted on the front of the guide rail, a screw rod is fixedly mounted on the output end of the motor, and the outer wall of the screw rod is threadedly connected to the inner wall of the sliding rod.

[0013] According to the above technical solution, the waste heat recovery part includes a water tank and a water outlet pipe. The water tank is fixedly installed on the bottom inner wall of the drying box, and the bent pipe extends into the water tank. A water pump is fixedly installed on the top of the water tank. The water inlet of the water pump is connected to a water inlet pipe. The bottom end of the water inlet pipe extends into the water tank. The water outlet of the water pump is connected to a connecting pipe. The top end of the connecting pipe is connected to the interior of the heating plate. The top end of the water outlet pipe is connected to the interior of the heating plate, and the bottom end of the water outlet pipe extends into the water tank.

[0014] According to the above technical solution, a limit frame is fixedly installed on the back of the drying box, a clamping plate is fixedly installed on the back of the box door, a sealing strip is fixedly installed on the inner wall of the limit frame, and the clamping plate is clamped in the limit frame.

[0015] According to the above technical solution, the air outlet end of the suction pump is connected to a filter box through a pipeline, a filter element is fixedly installed on the inner wall of the filter box, and an exhaust pipe is connected to the right inner wall of the filter box, and the right end of the exhaust pipe extends outside the drying box.

[0016] According to the above technical solution, there are four rotating shafts 2, which are symmetrically arranged in the base plate. The front and rear adjacent rotating shafts 2 are connected by a second pulley group, and a magnet is fixedly installed on the top of the support rod.

[0017] According to the above technical solution, the connection point between the connecting pipe and the heating plate is located at the left end of the heating plate, and the connection point between the water outlet pipe and the heating plate is located at the right end of the heating plate.

[0018] A working method of paint drying equipment comprises the following steps:

[0019] S1. Open the door and rotate shaft 1 so that shaft 1 drives shaft 2 to rotate through pulley set 1, which in turn drives the gear to rotate. The gear rotation drives the rack to move, which in turn drives the I-type plate to move along the guide groove. The movement of the I-type plate drives the support rod to move, so that the four shafts 2 correspond to the four corners of the metal part respectively, and then the metal part is placed on the magnet sheet;

[0020] S2. Close the door, turn on the motor to drive the screw to rotate, so that the sliding rod moves along the guide rail, thereby driving the heating plate to move. At the same time, turn on the heater to heat the heating plate, and use the heating plate to heat the unpainted surface of the metal part. The thermal conductivity of the metal is used to heat the paint on the painted surface, thereby accelerating the drying of the paint.

[0021] S3. The air cylinder is turned on to drive the lifting frame down so that the lifting frame covers the metal part. Then, the fan and the suction pump are turned on at the same time. The fan draws air into the air duct, which is then accelerated by the fan and passed into the air inlet duct. Then, the air enters the lifting frame from the air inlet duct. The air is heated by the electric heating wire and flows out from the air outlet plate. At the same time, the suction pump is used to extract the original air inside the lifting frame, forming a stable airflow, so that the airflow flows over the metal part instead of blowing towards the metal part.

[0022] S4. The airflow passing through the bent pipe exchanges heat with the water in the water tank, heating the water. The water pump is turned on to pump the hot water into the heating plate to exchange heat with the heating plate. The water involved in the heat exchange flows back into the water tank through the outlet pipe.

[0023] S5. The air flow sucked in by the suction pump enters the filter box, where the pungent smell of the paint is filtered out, and then discharged to the outside through the exhaust pipe.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] 1. The present invention is provided with a hot air flow portion, which uses a fan to blow air and an air pump to suck air, forming a stable air flow in the lifting frame. The air flow is heated by an electric heating wire, and the hot air flow is used to exchange heat with the air on the surface of the metal part to achieve drying of the paint surface of the metal part. Because the hot air flow is not directly blown onto the paint surface, there is no need to worry about dust and other particles in the hot air flow being adsorbed by the paint surface. The drying process is set inside the drying box to prevent external flowing air from entering the drying box during the drying process. Secondly, the metal part is covered by the lifting frame, and a balanced inflow and outflow air flow is set in the lifting frame, which can also effectively prevent the air in the drying box from entering the lifting frame.

[0026] 2. The present invention is provided with a support portion. According to the size of the metal part, the first rotating shaft is rotated so that the first rotating shaft drives the second rotating shaft to rotate through the first pulley set, thereby driving the gear to rotate. The rotation of the gear drives the rack to move, thereby driving the I-shaped plate to move along the guide groove. The movement of the I-shaped plate drives the support rod to move, so that the four second rotating shafts correspond to the four corners of the metal part respectively. The metal part is then placed on the magnet sheet. Because the position of the support rod can be changed, it can be adjusted according to the size of the metal part.

[0027] 3. The present invention is provided with a heating part, and uses a motor to drive the screw rod to rotate, so that the sliding rod moves along the guide rail, thereby driving the heating plate to move, and at the same time turning on the heater to heat the heating plate, using the heating plate to heat the unpainted surface of the metal part, and using the thermal conductivity of the metal to heat the paint on the painted surface, thereby accelerating the drying of the paint. Moreover, the movable heating plate enables the heating plate to heat metal parts of different sizes. Compared with a fixed heating plate, the movable heating plate can ensure that metal parts of larger sizes can be heated, and also avoids the problem of heat waste when the metal parts are smaller. Moreover, by periodically moving back and forth, uniform heating of the metal parts can be ensured.

[0028] 4. The present invention is provided with a waste heat recovery unit, so that the air flow flowing through the bent pipe exchanges heat with the water in the water tank to heat the water. The water pump is turned on to pump hot water into the heating plate to exchange heat with the heating plate. The water involved in the heat exchange flows back to the water tank from the outlet pipe, thereby improving the utilization rate of the heat for drying. When the water in the water tank is heated to a sufficient temperature, the heating plate can be heated by hot water alone to meet the heating requirements of the heating plate for the metal parts without starting the heater. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0030] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0031] Figure 2 This is a schematic diagram of the front cross-sectional view of the drying box of the present invention;

[0032] Figure 3 This is a schematic diagram of the front cross-sectional view of the lifting frame, water tank, and filter box of the present invention;

[0033] Figure 4 It is a schematic structural diagram of the heating part of the present invention;

[0034] Figure 5 It is a schematic structural diagram of the support portion of the present invention;

[0035] Figure 6 This is a schematic diagram of the internal structure of the base plate of the present invention;

[0036] Figure 7 This is a partial structural diagram of the waste heat recovery unit of the present invention;

[0037] Figure 8 It is a structural schematic diagram of the box door and the limiting frame of the present invention.

[0038] In the figure: 1. Drying box; 2. Box door; 3. Drying assembly; 31. Hot air flow unit; 311. Cylinder; 312. Dust screen; 313. Fan; 314. Air duct; 315. Lifting frame; 316. Air inlet duct; 317. Electric heating wire; 318. Air outlet plate; 319. Suction pump; 3110. Bending pipe; 3111. Air inlet plate; 3112. Air outlet duct; 32. Support unit; 321. Bottom plate; 322. I-type plate; 323. Guide groove; 324. Support rod; 325. Rotating shaft 1; 326. Pulley assembly 1; 327, rotating shaft 2; 328, gear; 329, rack; 33, heating unit; 331, motor; 332, guide rail; 333, sliding rod; 334, screw; 335, heating plate; 336, heater; 34, waste heat recovery unit; 341, water tank; 342, water inlet pipe; 343, water pump; 344, connecting pipe; 345, water outlet pipe; 4, sealing strip; 5, card plate; 6, limit frame; 7, partition plate; 8, filter box; 9, filter element; 10, exhaust pipe; 11, magnet; 12, pulley set 2. DETAILED DESCRIPTION

[0039] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention. Example 1

[0040] A preferred embodiment of a paint drying device and a working method thereof provided by the present invention is as follows: Figures 1 to 8 Shown: A paint drying equipment, including a drying box 1;

[0041] A door 2 is provided on the front of the drying box 1;

[0042] A partition plate 7 fixedly mounted on the inner wall of the drying box 1;

[0043] and a drying assembly 3 disposed in the drying box 1, the drying assembly 3 including a hot air flow portion 31 and a support portion 32. The hot air flow portion 31 is located inside the drying box 1, a waste heat recovery portion 34 is provided outside the hot air flow portion 31, the support portion 32 is located on top of the partition plate 7, and a heating portion 33 is provided outside the support portion 32;

[0044] The hot air flow section 31 includes a cylinder 311 and an air duct 314. The cylinder 311 is fixedly mounted on the top of the drying box 1. The extended end of the cylinder 311 extends into the drying box 1. A lifting frame 315 is fixedly mounted on the extended end of the cylinder 311. The air duct 314 is fixedly mounted on the top of the drying box 1. A dustproof net 312 is fixedly mounted on the inner wall of the air duct 314. A fan 313 is fixedly mounted on the inner wall of the air duct 314. The air outlet of the fan 313 is connected to an air inlet duct 316. The bottom end of the air inlet duct 316 extends into the lifting frame 315. 5, the inner wall of the lifting frame 315 is fixedly installed with an electric heating wire 317, the inner wall of the lifting frame 315 is fixedly installed with an air outlet plate 318, and the inner wall of the lifting frame 315 is fixedly installed with an air inlet plate 3111. The electric heating wire 317, the air outlet plate 318, and the air inlet plate 3111 are arranged from right to left. The left inner wall of the lifting frame 315 is connected with an air outlet pipe 3112, and the bottom end of the air outlet pipe 3112 is connected with a bent pipe 3110. The right end of the bent pipe 3110 is connected with an air suction pump 319, which is connected to the fan 31 3 blows the airflow and the air suction pump 319 sucks the airflow, forming a stable airflow in the lifting frame 315, and the airflow is heated by the electric heating wire 317. The hot airflow is used to exchange heat with the air on the surface of the metal part to achieve the purpose of drying the paint surface of the metal part. Because the hot airflow is not directly blown to the paint surface, there is no need to worry about dust and other particles in the hot airflow being adsorbed by the paint surface, and the drying process is set inside the drying box 1 to prevent the outside flowing air from entering the drying box 1 during the drying process. Secondly, the metal is lifted by the lifting frame 315. The lifting frame 315 is covered with accessories, and a balanced airflow is set in and out in the lifting frame 315, which can also effectively prevent the air in the drying box 1 from entering the lifting frame 315. A limit frame 6 is fixedly installed on the back of the drying box 1, and a clamping plate 5 is fixedly installed on the back of the box door 2. A sealing strip 4 is fixedly installed on the inner wall of the limit frame 6. The clamping plate 5 is clamped in the limit frame 6. The sealing strip 4 is used to ensure the sealing effect between the clamping plate 5 and the limit frame 6, so that when the box door 2 is closed, outside air cannot enter the drying box 1 through the edge gap between the box door 2 and the drying box 1;

[0045] The cylinder 311 is turned on to drive the lifting frame 315 to descend, so that the lifting frame 315 covers the metal part, and then the fan 313 and the suction pump 319 are turned on at the same time. The fan 313 sucks air into the air duct 314, and then the air is accelerated by the fan 313 and passed into the air inlet duct 316, and then enters the lifting frame 315 from the air inlet duct 316. The air flow is heated by the electric heating wire 317 and flows out from the air outlet plate 318. At the same time, the suction pump 319 is used to extract the original air inside the lifting frame 315 to form a stable airflow, so that the air flow flows over the metal part instead of blowing towards the metal part. The hot air flow is used to exchange heat with the air on the surface of the metal part to achieve drying of the paint surface of the metal part.

[0046] In this embodiment, the air outlet end of the air suction pump 319 is connected to a filter box 8 through a pipeline, a filter element 9 is fixedly installed on the inner wall of the filter box 8, and an exhaust pipe 10 is connected to the right inner wall of the filter box 8. The right end of the exhaust pipe 10 extends to the outside of the drying box 1. The airflow sucked in by the air suction pump 319 enters the filter box 8, and the pungent smell of the volatilized paint is filtered out by the filter box 8, and then discharged to the outside through the exhaust pipe 10. Example 2

[0047] On the basis of Example 1, a preferred embodiment of a paint drying equipment and a working method thereof provided by the present invention is as follows Figures 1 to 8 As shown: the support portion 32 includes a bottom plate 321, the bottom plate 321 is fixedly mounted on the top of the partition plate 7, a guide groove 323 is provided on the top of the bottom plate 321, and a type plate 322 is slidably provided on the inner wall of the guide groove 323, a support rod 324 is fixedly mounted on the top of the type plate 322, a rack 329 is fixedly mounted on the bottom of the type plate 322, the rack 329 is meshed with a gear 328, and a second rotating shaft 327 is fixedly mounted on the inner wall of the gear 328, and the bottom end of the second rotating shaft 327 is rotatably connected to the inner wall of the bottom plate 321 through a bearing, and the second rotating shaft 327 is connected to the inner wall of the bottom plate 321 through a pulley group A first shaft 326 is transmission-connected to a first rotating shaft 325, the top end of which passes through the inner wall of the base plate 321 via a bearing. Four second rotating shafts 327 are provided and symmetrically arranged within the base plate 321. The front and rear adjacent second rotating shafts 327 are transmission-connected via a second pulley set 12, and are used to set corresponding four support rods 324 to support the four corners of the unpainted surface of the metal part. A magnet sheet 11 is fixedly mounted on the top of the support rod 324, which uses the magnet sheet 11 to attract the part of the metal part containing iron and nickel components, thereby increasing the support stability of the support rod 324 on the metal part.

[0048] Rotating shaft 1 325 causes shaft 1 325 to drive shaft 2 327 to rotate through pulley set 1 326, thereby driving gear 328 to rotate. The rotation of gear 328 drives rack 329 to move, thereby driving I-type plate 322 to move along guide groove 323. The movement of I-type plate 322 drives support rod 324 to move, so that the four shafts 2 327 correspond to the four corners of the metal part respectively, and then the metal part is placed on the magnet sheet 11. Since the position of support rod 324 can be changed, it can be adjusted according to the size of the metal part. Example 3

[0049] On the basis of Example 1, a preferred embodiment of a paint drying equipment and a working method thereof provided by the present invention is as follows Figures 1 to 8 As shown, the heating portion 33 includes a guide rail 332, which is fixedly mounted on the side outer wall of the bottom plate 321. A sliding rod 333 is slidably provided on the inner wall of the guide rail 332. A heating plate 335 is fixedly mounted on the top of the sliding rod 333. A heater 336 is fixedly mounted on the right outer wall of the heating plate 335. The heating end of the heater 336 extends into the heating plate 335. A motor 331 is fixedly mounted on the front of the guide rail 332. A screw rod 334 is fixedly mounted on the output end of the motor 331. The outer wall of the screw rod 334 is threadedly connected to the inner wall of the sliding rod 333.

[0050] The motor 331 is turned on to drive the screw rod 334 to rotate, so that the sliding rod 333 moves along the guide rail 332, thereby driving the heating plate 335 to move, and at the same time the heater 336 is turned on to heat the heating plate 335. The heating plate 335 is used to heat the unpainted surface of the metal part, and the thermal conductivity of the metal is used to heat the paint on the painted surface to accelerate the drying of the paint. The movable heating plate 335 allows the heating plate 335 to heat metal parts of different sizes. Compared with the fixed heating plate 335, the movable heating plate 335 can ensure that larger metal parts are heated, and also avoids the problem of heat waste when the metal parts are small. Moreover, by periodically moving back and forth, uniform heating of the metal parts can be ensured. Example 4

[0051] On the basis of Examples 1 and 3, a preferred embodiment of a paint drying device and a working method thereof provided by the present invention is as follows Figures 1 to 8As shown: the waste heat recovery unit 34 includes a water tank 341 and a water outlet pipe 345. The water tank 341 is fixedly installed on the bottom inner wall of the drying box 1, and the bent pipe 3110 extends into the water tank 341. A water pump 343 is fixedly installed on the top of the water tank 341. The water inlet of the water pump 343 is connected to the water inlet pipe 342. The bottom end of the water inlet pipe 342 extends into the water tank 341. The water outlet of the water pump 343 is connected to the connecting pipe 344. The top end of the connecting pipe 344 is connected to the interior of the heating plate 335. The top end of the water outlet pipe 345 is connected to the interior of the heating plate 335, and the bottom end of the water outlet pipe 345 extends into the water tank 341.

[0052] The air flow passing through the bent tube 3110 exchanges heat with the water in the water tank 341 to heat the water. The water pump 343 is turned on to pump hot water into the heating plate 335 to exchange heat with the heating plate 335. The water involved in the heat exchange flows back to the water tank 341 from the outlet pipe 345, thereby improving the utilization rate of the heat for drying. When the water in the water tank 341 is heated to a sufficient temperature, the heating plate 335 can be heated by the hot water alone to meet the heating requirements of the heating plate 335 for the metal parts without starting the heater 336.

[0053] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0054] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or substitute equivalents for some of the technical features. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A paint drying device, comprising a drying box (1); A door (2) provided on the front of the drying box (1); A partition plate (7) fixedly mounted on the inner wall of the drying box (1); And a drying component (3) arranged in a drying box (1), characterized in that: The drying assembly (3) comprises a hot air flow portion (31) and a support portion (32); the hot air flow portion (31) is located inside the drying box (1); a waste heat recovery portion (34) is provided outside the hot air flow portion (31); the support portion (32) is located on top of the partition plate (7); a heating portion (33) is provided outside the support portion (32); The hot air flow portion (31) includes a cylinder (311) and an air duct (314). The cylinder (311) is fixedly mounted on the top of the drying box (1). The extended end of the cylinder (311) extends into the drying box (1). A lifting frame (315) is fixedly mounted on the extended end of the cylinder (311). The air duct (314) is fixedly mounted on the top of the drying box (1). A dustproof net (312) is fixedly mounted on the inner wall of the air duct (314). A fan (313) is fixedly mounted on the inner wall of the air duct (314). The air outlet of the fan (313) is connected to an air inlet duct (316). The bottom end of the air inlet duct (316) extends outward. The lifting frame (315) is inserted into the lifting frame (315), the inner wall of the lifting frame (315) is fixedly installed with an electric heating wire (317), the inner wall of the lifting frame (315) is fixedly installed with an air outlet plate (318), and the inner wall of the lifting frame (315) is fixedly installed with an air inlet plate (3111). The electric heating wire (317), the air outlet plate (318), and the air inlet plate (3111) are arranged from right to left. The left inner wall of the lifting frame (315) is connected to an air outlet pipe (3112), the bottom end of the air outlet pipe (3112) is connected to a bending pipe (3110), and the right end of the bending pipe (3110) is connected to an air suction pump (319).

2. The paint drying equipment according to claim 1, characterized in that: The support portion (32) includes a bottom plate (321), the bottom plate (321) is fixedly mounted on the top of the partition plate (7), a guide groove (323) is provided on the top of the bottom plate (321), an I-shaped plate (322) is slidably provided on the inner wall of the guide groove (323), a support rod (324) is fixedly mounted on the top of the I-shaped plate (322), a rack (329) is fixedly mounted on the bottom of the I-shaped plate (322), the rack (329) is meshed with a gear (328), a second rotating shaft (327) is fixedly mounted on the inner wall of the gear (328), the bottom end of the second rotating shaft (327) is rotatably connected to the inner wall of the bottom plate (321) through a bearing, the second rotating shaft (327) is transmission-connected to the first rotating shaft (325) through a pulley set (326), and the top end of the first rotating shaft (325) passes through the inner wall of the bottom plate (321) through a bearing.

3. The paint drying equipment according to claim 2, characterized in that: The heating portion (33) includes a guide rail (332), which is fixedly mounted on the side outer wall of the bottom plate (321); a sliding rod (333) is slidably provided on the inner wall of the guide rail (332); a heating plate (335) is fixedly mounted on the top end of the sliding rod (333); a heater (336) is fixedly mounted on the right outer wall of the heating plate (335); the heating end of the heater (336) extends into the heating plate (335); a motor (331) is fixedly mounted on the front of the guide rail (332); a screw rod (334) is fixedly mounted on the output end of the motor (331); and the outer wall of the screw rod (334) is threadedly connected to the inner wall of the sliding rod (333).

4. The paint drying equipment according to claim 3, characterized in that: The waste heat recovery unit (34) comprises a water tank (341) and a water outlet pipe (345). The water tank (341) is fixedly mounted on the bottom inner wall of the drying box (1), and the bent pipe (3110) extends into the water tank (341). A water pump (343) is fixedly mounted on the top of the water tank (341). The water inlet of the water pump (343) is connected to a water inlet pipe (342). The bottom end of the water inlet pipe (342) extends into the water tank (341). The water outlet of the water pump (343) is connected to a connecting pipe (344). The top end of the connecting pipe (344) is connected to the interior of the heating plate (335). The top end of the water outlet pipe (345) is connected to the interior of the heating plate (335). The bottom end of the water outlet pipe (345) extends into the water tank (341).

5. The paint drying equipment according to claim 4, characterized in that: A limit frame (6) is fixedly mounted on the back of the drying box (1), a clamping plate (5) is fixedly mounted on the back of the box door (2), a sealing strip (4) is fixedly mounted on the inner wall of the limit frame (6), and the clamping plate (5) is clamped in the limit frame (6).

6. The paint drying equipment according to claim 5, characterized in that: The air outlet end of the suction pump (319) is connected to a filter box (8) via a pipeline, a filter element (9) is fixedly mounted on the inner wall of the filter box (8), and an exhaust pipe (10) is connected to the right inner wall of the filter box (8), and the right end of the exhaust pipe (10) extends outside the drying box (1).

7. The paint drying equipment according to claim 6, characterized in that: There are four rotating shafts (327) provided and symmetrically arranged in the bottom plate (321). The front and rear adjacent rotating shafts (327) are connected by a pulley group (12) for transmission. A magnet sheet (11) is fixedly mounted on the top of the support rod (324).

8. The paint drying equipment according to claim 7, characterized in that: The connection point between the connecting pipe (344) and the heating plate (335) is located at the left end of the heating plate (335), and the connection point between the water outlet pipe (345) and the heating plate (335) is located at the right end of the heating plate (335).

9. A method for operating paint drying equipment, applied to the paint drying equipment according to claim 8, characterized in that: The following steps are included: S1. Open the box door (2), rotate the rotating shaft (325) so that the rotating shaft (325) drives the rotating shaft (327) to rotate through the pulley set (326), thereby driving the gear (328) to rotate, the gear (328) rotates and drives the rack (329) to move, thereby driving the I-type plate (322) to move along the guide groove (323), the movement of the I-type plate (322) drives the support rod (324) to move, so that the four rotating shafts (327) correspond to the four corners of the metal piece respectively, and then place the metal piece on the magnet sheet (11); S2, closing the door (2), turning on the motor (331) to drive the screw (334) to rotate, causing the sliding rod (333) to move along the guide rail (332), thereby driving the heating plate (335) to move, and simultaneously turning on the heater (336) to heat the heating plate (335), using the heating plate (335) to heat the unpainted surface of the metal part, and using the metal's thermal conductivity to heat the paint on the painted surface, thereby accelerating the drying of the paint; S3, the cylinder (311) is turned on to drive the lifting frame (315) to descend, so that the lifting frame (315) is covered above the metal part, and then the fan (313) and the suction pump (319) are turned on at the same time. The fan (313) sucks air into the air duct (314), and then the air is accelerated by the fan (313) and passed into the air inlet pipe (316), and then enters the lifting frame (315) from the air inlet pipe (316). The air flow is heated by the electric heating wire (317) and flows out from the air outlet plate (318). At the same time, the suction pump (319) is used to extract the original air inside the lifting frame (315), forming a stable air flow, so that the air flow flows over the metal part instead of blowing towards the metal part; S4, the airflow passing through the bent tube (3110) exchanges heat with the water in the water tank (341), heating the water. The water pump (343) is turned on to pump the hot water into the heating plate (335), exchanging heat with the heating plate (335). The water involved in the heat exchange flows back into the water tank (341) through the outlet pipe (345); S5. The air flow sucked by the air suction pump (319) enters the filter box (8), where the filter box (8) filters out the pungent odor of the paint volatilization, and then the air flow is discharged to the outside through the exhaust pipe (10).

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