A high-efficiency exhaust gas purification device for a painting plant

Abstract

This invention relates to the technical field of workshop exhaust gas purification devices, and discloses a high-efficiency exhaust gas purification device for painting workshops. The device includes a housing, with an upper winding assembly and a lower winding assembly fixedly connected to the top and bottom of the housing. A primary filtration chamber is provided inside the housing, with a filter cloth frame installed on the inner wall. Air filter cloth is wound around the surface of the filter cloth frame, and the other end of the air filter cloth is wound and connected to the lower winding assembly. A secondary filtration chamber is also provided inside the housing, with a filter box fixedly connected to the inner wall of the secondary filtration chamber. This invention connects the motors of each part to a touch control screen via a circuit. The operator only needs to operate the touch control screen to automatically complete the unwinding and rewinding of the Z-shaped air filter cloth and the automatic replenishment of activated carbon, achieving fully automatic replacement of the filter cloth and activated carbon without disassembling any mechanical parts.

Description

Technical Field

[0001] This invention relates to the field of workshop exhaust gas purification devices, and more specifically to a high-efficiency exhaust gas purification device for painting workshops. Background Technology

[0002] The high-efficiency purification device for exhaust gas in painting workshops is primarily used to treat exhaust gas containing paint mist and harmful gases generated in the painting workshop. It achieves graded purification of exhaust gas to ensure that emissions meet standards. It also features automatic filter cloth replacement, convenient activated carbon replenishment, and centralized treatment. The treatment technology for painting exhaust gas is mainly divided into two stages: pretreatment and deep purification. The pretreatment stage mainly uses filter materials to intercept paint mist and large particulate dust in the exhaust gas to prevent clogging of subsequent treatment equipment. Common pretreatment methods include dry filtration (such as filter cloth and filter cotton) and wet scrubbing (such as water swirl and spray). The deep purification stage targets gaseous pollutants. Mainstream technologies include activated carbon adsorption, regenerative thermal oxidizer (RTO), catalytic combustion (RCO), and zeolite rotor concentration coupled with combustion processes. Among them, the "adsorption concentration + combustion" technology is widely used in the treatment of low-concentration, high-volume organic waste gas and can achieve high purification efficiency.

[0003] In existing devices, air filter cloths mostly adopt a fixed installation structure. When the filter cloth becomes clogged due to intercepting a large amount of paint mist after a period of use, the system resistance will increase significantly, and the purification efficiency will decrease accordingly. At this time, the operator must stop the machine and turn on the equipment, manually remove the clogged filter cloth, and then manually spread out a new filter cloth for installation. The whole process is time-consuming and labor-intensive. Moreover, the equipment cannot treat exhaust gas during the shutdown period, which leads to the forced interruption of the production line or direct discharge of exhaust gas, seriously affecting the production rhythm and environmental safety of the workshop. Even if some devices adopt a roll-type filter cloth structure, the replacement still requires manual pulling of the filter cloth and manual adjustment of the spreading state, making it difficult to achieve fast and continuous automated operation. Activated carbon, as an adsorbent material, will become saturated and ineffective after a period of use, requiring regular replacement to ensure purification efficiency. In traditional devices, the activated carbon layer often uses a fixed filling structure. When the adsorption performance decreases, operators must stop the machine, open the equipment, manually remove the saturated activated carbon, and refill it with new carbon. The entire replacement process is time-consuming. During the downtime, the equipment cannot treat waste gas, which also leads to the forced interruption of the production line or direct discharge of waste gas. For continuous production painting workshops, frequent downtime for maintenance not only reduces the efficiency of waste gas treatment but may also lead to cumulative emissions exceeding standards, making it difficult to meet increasingly stringent environmental emission standards. In addition, the equipment's seal is compromised during the replacement process, posing a risk of waste gas leakage, which endangers the health of operators and pollutes the workshop environment. Summary of the Invention

[0004] In order to overcome the above-mentioned defects of the prior art, the present invention provides a high-efficiency purification device for exhaust gas in a painting workshop, so as to solve the problems existing in the background art.

[0005] This invention provides the following technical solution: a high-efficiency exhaust gas purification device for a painting workshop, comprising a purification device housing, an upper winding assembly fixedly connected to the top of the purification device housing, a lower winding assembly fixedly connected to the bottom of the purification device housing, a primary filtration chamber opened inside the purification device housing, a filter cloth frame installed on the inner wall of the primary filtration chamber, an air filter cloth wound around the surface of the filter cloth frame, one end of the air filter cloth wound and connected to the upper winding assembly, and the other end of the air filter cloth wound and connected to the lower winding assembly, a secondary filtration chamber opened inside the purification device housing, a filter box fixedly connected to the inner wall of the secondary filtration chamber, a storage box installed on the top of the filter box, and a discharge box installed on the bottom of the filter box.

[0006] Furthermore, a base is fixedly connected to the bottom of the purification device housing, a touch control screen is installed on the side of the purification device housing, a sealed cabinet door is provided outside the touch control screen, and a purification filter cartridge is inserted inside the sealed cabinet door.

[0007] Furthermore, the filter cloth frame includes a first round rod and a second round rod. The two ends of the first round rod are welded and fixed to the inner wall of the primary filtration chamber. One end of the second round rod is fixedly connected to a round rod push plate. Both the top and bottom ends of the second round rod are equipped with pulleys.

[0008] Furthermore, the upper winding assembly includes an upper winding machine housing and an upper motor housing. A first roll is sleeved inside the upper winding machine housing, and an air filter cloth is wound around the surface of the first roll. An upper telescopic device is installed at the bottom of the upper winding machine housing, and a second conveyor belt is sleeved inside the upper motor housing.

[0009] Furthermore, a first conveyor belt is fitted inside the upper motor housing, a double gear is fitted at the bottom of the upper motor housing, a gear rack is meshed at the bottom of the double gear, and a round rod push plate is fixedly connected to the outside of the gear rack.

[0010] Furthermore, alligator clips are fixedly connected to both sides of the winding machine box, spring columns are installed at both ends of the top of the winding machine box, a conductive plate is provided at one end of the top of the winding machine box, and an outer cabinet door is movably connected to the other end of the winding machine box. A copper sheet is fixedly connected to the surface of the outer cabinet door, and a copper sheet can be nested inside the conductive plate.

[0011] Furthermore, the lower winding assembly includes a lower winding machine housing, bolts, a lower motor housing, and a second drum. The top of the lower winding machine housing is fitted to the bottom of the outer shell of the purification device. Bolts are sleeved on both sides of the lower winding machine housing. The lower motor housing is fixedly connected inside the lower winding machine housing. The second drum is sleeved on the inner wall of the lower winding machine housing. Air filter cloth is wound on the surface of the second drum. A lower telescopic device is provided at the top of the second drum.

[0012] Furthermore, the bottom of the storage box is provided with a closed slide groove, the bottom of the closed slide groove is provided with a feed port, a closed slide plate is slidably connected inside the closed slide groove, and electric telescopic rods are fixedly connected to both sides of the storage box, and the electric telescopic rods are fixedly connected to the closed slide plate.

[0013] Furthermore, a third motor is fixedly connected to the bottom of the secondary filtration chamber. The two sides of the third motor are respectively connected to transmission gears via rotating shafts. A closed baffle is movably connected to the outer shell of the third motor. A sliding connecting rod is slidably connected to the bottom of the closed baffle, and the sliding connecting rod is fixedly connected to the transmission gears.

[0014] Furthermore, a louvered regulating valve is provided at one end of the secondary filter chamber, a tertiary filter chamber is provided at the other end of the secondary filter chamber, and an exhaust fan box is provided at the other end of the tertiary filter chamber.

[0015] The technical effects and advantages of this invention are as follows: 1. This invention, through the cooperation of an upper winding assembly, a lower winding assembly, and a movable second round rod, can automatically complete the winding of the old filter cloth and the lowering of the new filter cloth after the filter cloth becomes clogged, and automatically re-stretch the filter cloth into a Z-shaped structure. The entire process does not require machine shutdown for disassembly or manual spreading of the filter cloth, which greatly improves the continuous working capacity of the coating exhaust gas purification device. This is a function that traditional fixed filter cloth structures and ordinary roll filter cloths do not have.

[0016] 2. This invention can automatically replenish new activated carbon in the storage tank and automatically discharge waste activated carbon from the bottom of the filter box without stopping the equipment. The replenishment and discharge processes are sealed and isolated by electric mechanism and transmission gear, avoiding mixing of new and old activated carbon, leakage of waste gas or short circuit of airflow. It solves the problems of traditional activated carbon filter devices that require stopping the machine to open the cover for replacement, cumbersome maintenance and easy interruption of purification efficiency.

[0017] 3. This invention connects the motors of each part to the touch control screen via circuitry. The operator only needs to operate the touch control screen to automatically unwind and rewind the Z-shaped air filter cloth and automatically replenish the activated carbon. The entire process does not require disassembling any mechanical parts, and the filter cloth and activated carbon can be automatically replaced throughout the process. This greatly reduces the difficulty of operation, ensures the continuous and stable operation of the device, and effectively solves the technical pain points of traditional devices that require disassembly for maintenance, have complicated processes, and are prone to interruption of purification efficiency. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0019] Figure 2 This is a schematic diagram of the internal structure of the purification device housing of the present invention.

[0020] Figure 3 This is a schematic diagram of the primary filter chamber structure of the present invention.

[0021] Figure 4 This is a schematic diagram of the filter cloth frame structure of the present invention.

[0022] Figure 5 This is a schematic diagram of the upper winding assembly structure of the present invention.

[0023] Figure 6 This is a schematic diagram of the internal structure of the upper winding assembly of the present invention.

[0024] Figure 7 This is a schematic diagram of the secondary filtration chamber structure of the present invention.

[0025] Figure 8 This is a schematic diagram of the storage box structure of the present invention.

[0026] Figure 9 This is a schematic diagram of the sliding connecting rod structure of the present invention.

[0027] The attached figures are labeled as follows: 1. Purification device housing; 2. Primary filtration chamber; 3. Filter cloth frame; 4. Air filter cloth; 5. Upper winding assembly; 6. Lower winding assembly; 7. Secondary filtration chamber; 8. Filter box; 9. Storage bin; 10. Discharge bin; 101. Base; 102. Touch control screen; 103. Sealed cabinet door; 104. Purification filter cartridge; 201. First conveyor belt; 202. Double gear; 203. Gear rack; 301. First round rod; 302. Second round rod; 303. Round rod push plate; 304. Pulley; 501. Upper winding machine box; 502. Upper motor box; 503. First drum; 504. 505. Second conveyor belt; 506. Upper telescopic device; 507. Outer cabinet door; 508. Copper sheet plate; 509. Conductive plate; 510. Alligator clip; 511. Spring column; 602. Lower winding machine box; 603. Bolt; 604. Lower motor box; 605. Second drum; 706. Lower telescopic device; 707. Third motor; 708. Transmission gear; 709. Closing baffle; 7000. Sliding connecting rod; 801. Louvered regulating valve; 802. Three-stage filter chamber; 803. Exhaust fan box; 901. Closing chute; 902. Feed inlet; 903. Closing slide plate; 904. Electric telescopic rod. Detailed Implementation

[0028] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. In addition, the forms of the various structures described in the following embodiments are merely illustrative. The workshop exhaust gas purification device involved in the present invention is not limited to the structures described in the following embodiments. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] Reference Figure 1-9 This invention provides a high-efficiency purification device for exhaust gas in a painting workshop, comprising a purification device housing 1. Exhaust gas generated in the painting workshop enters the primary filtration chamber 2 of the purification device housing 1 through a pipeline. As the exhaust gas flows within the primary filtration chamber 2, it passes through air filter cloths 4 arranged in a Z-shape. Impurities such as paint mist and large particulate dust are intercepted by the air filter cloths 4, thus achieving preliminary filtration of the exhaust gas. The pre-filtered exhaust gas enters the secondary filtration chamber 7, passing through the activated carbon adsorption layer within the filter box 8. Harmful gases and fine impurities in the exhaust gas are adsorbed by the activated carbon, completing deep purification. The purified exhaust gas exits through the outlet of the secondary filtration chamber 7. The air is discharged in a manner that meets emission standards. When the air filter cloth 4 becomes clogged after a period of use, the upper winding assembly 5 and the lower winding assembly 6 can be activated. The lower winding assembly 6 winds up the clogged air filter cloth 4 and stores it, while the upper winding assembly 5 lowers a new air filter cloth 4, stretching it synchronously and maintaining a Z-shaped structure to tightly fit the filter cloth frame 3, thus completing the automatic replacement of the filter cloth. When the adsorption performance of activated carbon decreases, new activated carbon can be added to the filter box 8 through the storage box 9. The saturated waste activated carbon falls into the discharge box 10 for regular centralized treatment, ensuring the continuous and stable operation of the purification device and achieving efficient and convenient purification of coating exhaust gas.

[0030] In a preferred embodiment, the base 101 installed at the bottom of the purification device housing 1 provides stable support for the device, preventing shaking during operation and improving operational stability. Simultaneously, the touch control screen 102 connects to multiple motors, allowing the operator to intuitively and conveniently control operating parameters such as winding speed and activated carbon replenishment. When the purification filter cartridge 104 is used up and needs replacement, the replacement can be performed by opening the sealed cabinet door 103. The operation is simple and convenient, and the sealed cabinet door 103 ensures the device's airtightness, preventing exhaust gas leakage.

[0031] In a preferred embodiment, when replacing the old air filter cloth 4, the second round rod 302 is pushed by the round rod push plate 303 and slid by the pulley 304, and moves smoothly to one end of the first round rod 301. At this time, the air filter cloth 4 loses the tensile force of the second round rod 302 and is in a relaxed state, which facilitates the cooperation between the lower winding assembly 6 and the upper winding assembly 5 to replace the old part of the air filter cloth 4 with the new part. After the replacement is completed, the round rod push plate 303 pulls the second round rod 302 to the other end of the first round rod 301, thereby re-stretching the air filter cloth 4 into a Z-shape, ensuring that the air filter cloth 4 fits tightly against the inner wall of the device, ensuring the subsequent exhaust gas filtration effect. At the same time, the pulley 304 can reduce the friction when the second round rod 302 moves, making the operation smoother.

[0032] In a preferred embodiment, a motor installed inside the upper motor housing 502 drives the first roll 503 to rotate via the second conveyor belt 504, thereby unwinding the air filter cloth 4 wound on the first roll 503, achieving automatic unwinding of the air filter cloth 4. When the air filter cloth 4 is unwound to a specified length, the upper telescopic device 505 installed at the bottom of the upper winding housing 501 presses the telescopic rubber plate down to the top of the transport channel opening of the air filter cloth 4. This not only stably clamps and fixes the air filter cloth 4, ensuring that the air filter cloth 4 remains flat, but also ensures the sealing of the transport channel opening of the air filter cloth 4, preventing exhaust gas from leaking from the gaps and ensuring that the filtration and purification effect is not affected.

[0033] In a preferred embodiment, the motor inside the upper motor housing 502 drives the double gear 202 to rotate via the first conveyor belt 201. The double gear 202 and the gear rack 203 mesh together, driving the gear rack 203 to move the welded round rod push plate 303 back and forth, thus realizing the automatic movement of the second round rod 302 without manual pushing. This improves the automation level of the equipment, reduces the labor intensity of the operators, and ensures that the gear transmission structure is stable, ensuring the precise movement of the second round rod 302 and guaranteeing the stretching effect of the air filter cloth 4.

[0034] In a preferred embodiment, when adding a new air filter cloth 4 through the outer cabinet door 506 installed on the top of the upper winding machine box 501, the upper telescopic device 505 presses the telescopic rubber plate down to the top of the transport channel opening of the air filter cloth 4 to prevent exhaust gas from leaking out of the inner wall. After the air filter cloth 4 is replaced, the outer cabinet door 506 is closed. When the copper plate 507 installed on the outer cabinet door 506 is in contact with the conductive plate 508, the upper telescopic device 505 is triggered to operate, causing the telescopic rubber plate to rise and open the transport channel opening of the air filter cloth 4, realizing automated control. The spring column 510 installed on the top of the upper winding machine box 501 can prevent accidental contact with the outer cabinet door 506, which would cause the copper plate 507 and the conductive plate 508 to close prematurely, thereby avoiding exhaust gas leakage and improving the safety and reliability of the equipment. The alligator clip 509 can further fix the upper winding machine box 501 to ensure its stable installation.

[0035] In a preferred embodiment, the lower telescopic device 605 controls the telescopic rubber plate to retract, thereby opening the transport channel opening of the air filter cloth 4 to facilitate the winding of the air filter cloth 4. The motor of the lower motor housing 603 drives the second drum 604 to rotate, thereby performing the winding operation of the air filter cloth 4 and realizing the automatic collection of the blocked filter cloth. When the air filter cloth 4 is wound to a specified length, the lower telescopic device 605 pushes the telescopic rubber plate to reset, sealing the transport channel opening of the air filter cloth 4 to prevent exhaust gas leakage. A lower winding machine housing 601 is installed outside the transport channel opening and is fixed with bolts installed on the lower winding machine housing 601 to further improve the sealing performance and ensure that there is no exhaust gas leakage during equipment operation.

[0036] In a preferred embodiment, when the adsorption effect of activated carbon decreases, the electric telescopic rod 904 pushes the closed slide plate 903 to move inside the closed slide groove 901, so that the feed inlet 902 is no longer blocked by the closed slide plate 903. This allows the activated carbon inside the storage tank 9 to fall from the feed inlet 902 into the filter box 8, realizing automatic replenishment of activated carbon. When the filter box 8 is full of activated carbon, the electric telescopic rod 904 pulls the closed slide plate 903 inside the closed slide groove 901 to reset, realizing the separation of the activated carbon inside the storage tank 9 from the activated carbon inside the filter box 8. This not only increases the sealing of the secondary filtration chamber 7, but also avoids the mixing of new and old activated carbon from affecting the adsorption effect, ensuring stable deep purification effect.

[0037] In a preferred embodiment, the third motor 701 drives the sliding connecting rod 704 to rotate via its internal output shaft and transmission gear 702. This, in turn, causes the closed baffle 703 connected to the sliding connecting rod 704 to open and close at the bottom channel of the filter box 8. This ensures that the activated carbon in the filter box 8 can fully adsorb harmful gases in the exhaust gas. When the activated carbon inside the filter box 8 needs to be replaced, the transmission gear 702 drives the sliding connecting rod 704 to rotate, pushing the slider connected to the bottom of the closed baffle 703 forward. This causes the closed baffle 703 to rotate downward, thereby opening the bottom channel of the filter box 8. The activated carbon in the filter box 8 falls into the discharge box 10, achieving automatic discharge of waste activated carbon. After the activated carbon is discharged, the sliding connecting rod 704 pulls the slider at the bottom of the closed baffle 703 backward, causing the closed baffle 703 to reset and seal the bottom channel of the filter box 8, preventing exhaust gas leakage and ensuring the airtightness of the equipment during operation.

[0038] In a preferred embodiment, a louvered regulating valve 801 is installed between the secondary filter chamber 7 and the primary filter chamber 2. When the activated carbon in the filter box 8 is replaced, the louvered regulating valve 801 can be closed to prevent unpurified waste gas or activated carbon from flowing into the tertiary filter chamber 802, thus avoiding a reduction in the purification effect of the waste gas. The tertiary filter chamber 802 is used to further purify the already purified waste gas, further removing fine impurities and improving the purification precision. The purified air is then discharged through a fan inside the exhaust fan box 803, accelerating the waste gas flow speed, improving purification efficiency, and ensuring that the discharged air meets emission standards.

[0039] Working principle of the invention: The core of this device is used to treat the waste gas containing paint mist and harmful gases in the painting workshop, achieving graded purification and emission compliance. It also has the functions of automatic filter cloth replacement, convenient activated carbon replenishment and centralized treatment. Its overall structure is based on the outer shell 1 of the purification device. The outer shell is integrally welded from corrosion-resistant and high-temperature resistant stainless steel. Inside, there are interconnected primary filter chamber 2 and secondary filter chamber 7, which respectively undertake the tasks of preliminary filtration and deep purification. The upper winding assembly 5 at the top of the outer shell and the lower winding assembly 6 at the bottom work together to provide power for the automatic replacement of the air filter cloth 4. The filter cloth frame 3 in the sliding connecting rod 704 supports the air filter cloth in a Z-shaped arrangement to improve filtration efficiency. The filter box 8 in the secondary filter chamber is filled with an activated carbon adsorption layer. The matching storage box 9 and discharge box 10 realize the replenishment of new activated carbon and the centralized collection of waste activated carbon, respectively.

[0040] During equipment operation, exhaust gas from the painting workshop enters the primary filtration chamber 2 through pipelines. It passes through the Z-shaped air filter cloth 4 to intercept paint mist and large dust particles, completing preliminary filtration. The pre-purified exhaust gas enters the secondary filtration chamber 7, where it passes through the activated carbon adsorption layer in the filter box 8 to adsorb harmful gases and fine impurities, achieving deep purification before being discharged in compliance with standards. During maintenance, when the air filter cloth 4 becomes clogged, the upper and lower winding components operate synchronously. The lower winding component winds up the old filter cloth, while the upper winding component lowers the new filter cloth and maintains a Z-shaped stretching state, completing automatic replacement. When the activated carbon adsorption is saturated, new activated carbon is replenished through the storage box 9, while the waste activated carbon falls into the discharge box 10 for periodic centralized treatment, ensuring the continuous and stable operation of the equipment.

[0041] To further enhance equipment stability, automation, and sealing, the base 101 ensures stable equipment operation, the touch control screen 102 facilitates parameter control, and the sealed cabinet door 103 enables convenient replacement of the purification filter cartridge 104. The filter cloth frame 3, through a movable second round rod 302 and gear transmission, achieves automatic tensioning of the air filter cloth. The upper and lower winding components, triggered by a motor, telescopic device, and cabinet door sensor, achieve fully sealed and automated linkage during filter cloth replacement. The storage box 9 and filter box 8, through an electric sliding plate and an openable / closable channel, achieve automatic replenishment of activated carbon and discharge of waste carbon. The secondary filtration chamber is equipped with a louvered regulating valve 801, the tertiary filtration chamber 802, and an exhaust fan box 803, further improving purification accuracy and airflow efficiency, and comprehensively ensuring the purification effect of exhaust gas.

[0042] Although the invention has been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these inventions without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

[0043] Finally, the following points should be noted: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection", and "linkage" should be interpreted broadly, and can be mechanical or electrical connections, or internal connections between two components, or direct connections. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may change. Secondly: The accompanying drawings of this invention only involve structures related to this invention. Other structures can be referred to with common designs. In the absence of conflict, the same invention and different inventions of this invention can be combined with each other. Finally: The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A high-efficiency purification device for exhaust gas in a painting workshop, comprising a purification device housing (1), characterized in that: The top of the purification device housing (1) is fixedly connected to an upper winding assembly (5), and the bottom of the purification device housing (1) is fixedly connected to a lower winding assembly (6). The purification device housing (1) has a primary filtration chamber (2) inside. A filter cloth frame (3) is installed on the inner wall of the primary filtration chamber (2). An air filter cloth (4) is wound around the surface of the filter cloth frame (3). One end of the air filter cloth (4) is wound and connected to the upper winding assembly (5), and the other end of the air filter cloth (4) is wound and connected to the lower winding assembly (6). The purification device housing (1) has a secondary filtration chamber (7) inside. A filter box (8) is fixedly connected to the inner wall of the secondary filtration chamber (7). A storage box (9) is installed on the top of the filter box (8), and a discharge box (10) is installed on the bottom of the filter box (8).

2. The high-efficiency purification device for exhaust gas in a painting workshop according to claim 1, characterized in that: The bottom of the purification device housing (1) is fixedly connected to a base (101), and a touch control screen (102) is installed on the side of the purification device housing (1). A sealed cabinet door (103) is provided on the outside of the touch control screen (102), and a purification filter cartridge (104) is inserted inside the sealed cabinet door (103).

3. The high-efficiency purification device for exhaust gas in a painting workshop according to claim 1, characterized in that: The filter cloth frame (3) includes a first round rod (301) and a second round rod (302). The two ends of the first round rod (301) are welded and fixed to the inner wall of the primary filter chamber (2). One end of the second round rod (302) is fixedly connected to a round rod push plate (303). Both the top and bottom ends of the second round rod (302) are equipped with pulleys (304).

4. The high-efficiency purification device for exhaust gas in a painting workshop according to claim 1, characterized in that: The upper winding assembly (5) includes an upper winding machine housing (501) and an upper motor housing (502). The upper winding machine housing (501) is fitted with a first roll (503), and the surface of the first roll (503) is wrapped with an air filter cloth (4). An upper telescopic device (505) is installed at the bottom of the upper winding machine housing (501), and a second conveyor belt (504) is fitted with the inside of the upper motor housing (502).

5. The high-efficiency purification device for exhaust gas in a painting workshop according to claim 4, characterized in that: The upper motor housing (502) is fitted with a first conveyor belt (201), and a double gear (202) is fitted with the bottom of the upper motor housing (502). A gear rack (203) meshes with the bottom of the double gear (202), and a round rod push plate (303) is fixedly connected to the outside of the gear rack (203).

6. The high-efficiency purification device for exhaust gas in a painting workshop according to claim 4, characterized in that: Alligator clips (509) are fixedly connected to both sides of the upper winding machine box (501). Spring columns (510) are installed at both ends of the top of the upper winding machine box (501). A conductive plate (508) is provided at one end of the top of the upper winding machine box (501). A cabinet door (506) is movably connected to the other end of the upper winding machine box (501). A copper sheet (507) is fixedly connected to the surface of the cabinet door (506). The copper sheet (507) can be nested inside the conductive plate (508).

7. The high-efficiency purification device for exhaust gas in a painting workshop according to claim 1, characterized in that: The lower winding assembly (6) includes a lower winding machine housing (601), bolts (602), a lower motor housing (603), and a second drum (604). The top of the lower winding machine housing (601) is attached to the bottom of the outer shell (1) of the purification device. Bolts (602) are sleeved on both sides of the lower winding machine housing (601). The lower motor housing (603) is fixedly connected inside the lower winding machine housing (601). The second drum (604) is sleeved on the inner wall of the lower winding machine housing (601). Air filter cloth (4) is wound on the surface of the second drum (604). A lower telescopic device (605) is provided on the top of the second drum (604).

8. The high-efficiency purification device for exhaust gas in a painting workshop according to claim 1, characterized in that: The bottom of the storage box (9) is provided with a closed slide groove (901), the bottom of the closed slide groove (901) is provided with a feed inlet (902), the inside of the closed slide groove (901) is slidably connected with a closed slide plate (903), and electric telescopic rods (904) are fixedly connected to both sides of the storage box (9). The electric telescopic rods (904) are connected and fixed to the closed slide plate (903).

9. The high-efficiency purification device for exhaust gas in a painting workshop according to claim 1, characterized in that: A third motor (701) is fixedly connected to the bottom of the secondary filter chamber (7). The two sides of the third motor (701) are respectively connected to transmission gears (702) through rotating shafts. A closing baffle (703) is movably connected to the outer shell of the third motor (701). A sliding connecting rod (704) is slidably connected to the bottom of the closing baffle (703). The sliding connecting rod (704) is fixedly connected to the transmission gear (702).

10. A high-efficiency purification device for exhaust gas in a painting workshop according to claim 1, characterized in that: One end of the secondary filter chamber (7) is provided with a louvered regulating valve (801), and the other end of the secondary filter chamber (7) is provided with a tertiary filter chamber (802). The other end of the tertiary filter chamber (802) is provided with an exhaust fan box (803).

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