Waste gas recovery system applied to electrostatic spraying process

Abstract

The invention relates to the technical field of spraying, and discloses a waste gas recovery system applied to an electrostatic spraying procedure, the waste gas recovery system comprises a bottom plate, the upper surface of the bottom plate is fixedly connected with a composite plate through a connecting rod, and the upper surface of the bottom plate is fixedly connected with a placing frame and a recovery cylinder; the top end of the shaft rod is rotationally connected to the lower surface of the composite plate, a spiral plate is fixedly connected to the outer circumferential surface of the shaft rod, a middle ring body is fixedly connected to the outer circumferential surface of the shaft rod, the outer circumferential surface of the shaft rod is slidably sleeved with an upper ring body and a lower ring body, and a worm is rotationally connected to the lower surface of the composite plate. The waste gas recovery system can effectively solve the problems that in the prior art, when the gas inflow of waste gas is large, the movement speed of the waste gas in the absorption liquid is easily increased, the retention time of the waste gas in the absorption liquid is shortened, contact between the waste gas and the absorption liquid is insufficient, and then the purification efficiency of the absorption liquid on the waste gas is reduced.

Description

Technical Field

[0001] The invention relates to the field of spraying technology, and in particular to a waste gas recovery system applied to an electrostatic spraying process. Background Art

[0002] Electrostatic spraying is a process that uses the physical phenomenon of electrostatic induction to spray paint onto the surface of a workpiece based on the effect of electrostatic field on electric charges. During the electrostatic spraying process, certain specific liquids are usually used to recycle the waste gas generated by the spraying, so that the particulate matter and some organic matter in the waste gas are dissolved in the absorption liquid, thereby achieving the purpose of purifying the waste gas and preventing environmental pollution.

[0003] At present, in the process of using liquid to absorb particles and organic matter in exhaust gas, when the intake volume of exhaust gas is large, it is easy to accelerate the movement speed of exhaust gas in the absorption liquid, making the residence time of exhaust gas in the absorption liquid shorter, resulting in insufficient gas-liquid contact between exhaust gas and absorption liquid, thereby reducing the purification efficiency of absorption liquid for exhaust gas. Summary of the invention

[0004] Technical issues solved

[0005] In view of the above-mentioned shortcomings of the prior art, the present invention provides a waste gas recovery system applied to the electrostatic spraying process, which can effectively solve the problem in the prior art that when the exhaust gas intake volume is large, it is easy to accelerate the movement speed of the exhaust gas in the absorption liquid, shorten the residence time of the exhaust gas in the absorption liquid, and the contact between the exhaust gas and the absorption liquid is not sufficient, thereby reducing the purification efficiency of the absorption liquid for the exhaust gas.

[0006] Technical Solution

[0007] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0008] The present invention provides a waste gas recovery system applied to an electrostatic spraying process, comprising:

[0009] A bottom plate, the upper surface of which is fixedly connected to a composite plate via a connecting rod, and the upper surface of which is fixedly connected to a placement rack and a recovery barrel;

[0010] A shaft, the top end of which is rotatably connected to the lower surface of the composite plate, a spiral plate is fixedly connected to the circumferential outer surface of the shaft, a middle ring body is fixedly connected to the circumferential outer surface of the shaft, an upper ring body and a lower ring body are slidably sleeved on the circumferential outer surface of the shaft, a worm is rotatably connected to the lower surface of the composite plate, and an air inlet pipe and a U-shaped water pipe are fixedly connected to the circumferential outer surface of the recovery cylinder;

[0011] In the process of the shaft and the worm rotating under the composite plate, the spiral plate pushes the absorption liquid in the recovery cylinder downward so that the downward-flowing absorption liquid produces resistance to the upward-moving exhaust gas, and the rotating middle ring body cuts the bubbles in the middle by splitting the middle ring, the upper ring body cuts the bubbles above the middle ring body by splitting the upper ring, and the lower ring body cuts the bubbles below the middle ring body by splitting the lower ring.

[0012] Further, the middle ring body comprises a middle inner ring and a middle outer ring, the middle inner ring is fixedly connected to the circumferential outer surface of the shaft rod, the middle outer ring is rotatably connected to the circumferential inner surface of the recovery cylinder, a rotating middle rod is rotatably connected between the middle inner ring and the middle outer ring, and a plurality of rotating middle rods are provided and distributed in a circular array between the middle inner ring and the middle outer ring;

[0013] Among them, a split middle ring is fixedly connected to the circumferential outer surface of the rotating middle rod, the end of the rotating middle rod away from the middle inner ring passes through the middle outer ring and is fixedly connected to the middle gear, and a middle gear ring matching the middle gear is fixedly connected to the circumferential inner surface of the recovery cylinder.

[0014] Furthermore, a worm wheel is rotatably connected to the top of the placement rack, the worm wheel is meshingly connected to the worm, a transmission rod is fixedly connected to both sides of the worm wheel, and an upper rod and a lower rod are rotatably connected on the circumferential outer surface of the transmission rod.

[0015] Further, the upper ring body comprises an upper inner ring and an upper outer ring, the upper inner ring is slidably sleeved on the circumferential outer surface of the shaft rod, the upper outer ring is slidably sleeved on the circumferential outer surface of the recovery barrel, a rotating upper rod is rotatably connected between the upper inner ring and the upper outer ring, and a plurality of rotating upper rods are provided and distributed in a circular array between the upper inner ring and the upper outer ring;

[0016] Wherein, a split upper ring is fixedly connected to the circumferential outer surface of the rotating upper rod, one end of the rotating upper rod away from the upper inner ring passes through the upper outer ring and the recovery drum in sequence and is fixedly connected to an upper gear, and an upper rack matching the upper gear is fixedly connected to the circumferential outer surface of the recovery drum;

[0017] Wherein, one end of the upper rod away from the transmission rod is rotatably connected to the circumferential outer surface of the upper outer ring.

[0018] Further, the lower ring body comprises a lower inner ring and a lower outer ring, the lower inner ring is slidably sleeved on the circumferential outer surface of the shaft rod, the lower outer ring is slidably sleeved on the circumferential outer surface of the recovery barrel, a rotating lower rod is rotatably connected between the lower inner ring and the lower outer ring, and a plurality of rotating lower rods are provided and distributed in a circular array between the lower inner ring and the lower outer ring;

[0019] Wherein, a split lower ring is fixedly connected on the circumferential outer surface of the rotating lower rod, one end of the rotating lower rod away from the lower inner ring passes through the lower outer ring and the recovery drum in sequence and is fixedly connected with a lower gear, and a lower rack matching the lower gear is fixedly connected on the circumferential outer surface of the recovery drum;

[0020] Wherein, one end of the connecting lower rod away from the transmission rod is rotatably connected to the circumferential outer surface of the lower inner ring.

[0021] Furthermore, a vertical slide groove is provided on the circumferential outer surface of the recovery cylinder, and patches for closing the vertical slide groove are fixedly connected to the upper and lower sides of the upper ring body and the lower ring body.

[0022] Furthermore, a driving motor is fixedly connected to the upper surface of the composite plate, an output end of the driving motor is fixedly connected to the worm, and a driving belt is connected to a transmission sleeve on the circumferential outer surface of the worm and the shaft.

[0023] Beneficial Effects

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

[0025] The present invention is provided with a spiral plate, a middle ring body, an upper ring body and a lower ring body. The worm and the shaft are driven to rotate by controlling the driving motor. The rotating shaft pushes the absorption liquid to flow downward inside the recovery tube through the spiral plate, thereby increasing the resistance encountered by the exhaust gas moving upward in the absorption liquid, thereby controlling the movement speed of the exhaust gas in the absorption liquid and prolonging the residence time of the exhaust gas in the absorption liquid; the rotating shaft drives the middle ring body to rotate inside the recovery tube, so that the rotating split middle ring cuts the bubbles located in the middle of the absorption liquid; the rotating worm drives the upper ring body and the lower ring body to slide back and forth up and down on the surface of the recovery tube through the worm gear, so that the upper ring body cuts the bubbles above the middle ring body for multiple times, and the lower ring body cuts the bubbles below the middle ring body for multiple times, so that the gas-liquid contact between the exhaust gas and the absorption liquid is more complete, thereby improving the purification efficiency of the absorption liquid for the exhaust gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0027] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present invention;

[0028] Figure 2 This is a schematic diagram of the structure of a transmission belt according to an embodiment of the present invention;

[0029] Figure 3 It is a structural schematic diagram of a worm gear according to an embodiment of the present invention;

[0030] Figure 4 This is a schematic diagram of the structure of a spiral plate according to an embodiment of the present invention;

[0031] Figure 5 It is a schematic diagram of the structure of the ring body in an embodiment of the present invention;

[0032] Figure 6 This is a schematic diagram of the structure of the shaft rod according to an embodiment of the present invention;

[0033] Figure 7 It is a schematic diagram of the structure of a patch according to an embodiment of the present invention;

[0034] Figure 8 It is a schematic structural diagram of a worm gear according to an embodiment of the present invention.

[0035] The numbers in the figure represent:

[0036] 1. Bottom plate; 11. Composite plate; 12. Placement rack; 13. Recovery barrel;

[0037] 2. Shaft; 21. Spiral plate;

[0038] 22, middle ring body; 221, middle inner ring; 222, middle outer ring; 223, rotating middle rod; 2231, split middle ring; 2232, middle gear; 2233, middle gear ring;

[0039] 23, upper ring body; 231, upper inner ring; 232, upper outer ring; 233, rotating upper rod; 2331, splitting upper ring; 2332, upper gear; 2333, upper rack;

[0040] 24, lower ring body; 241, lower inner ring; 242, lower outer ring; 243, rotating lower rod; 2431, splitting lower ring; 2432, lower gear; 2433, lower rack;

[0041] 25, worm; 251, worm wheel; 252, transmission rod; 253, connecting upper rod; 254, connecting lower rod;

[0042] 26. Vertical chute; 261. Patch; 27. Air inlet pipe; 28. U-shaped water pipe;

[0043] 3. Driving motor; 31. Transmission belt. DETAILED DESCRIPTION

[0044] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are 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 creative work are within the scope of protection of the present invention.

[0045] The present invention will be further described below in conjunction with the embodiments.

[0046] Example:

[0047] See also Figure 1-Figure 8 The present invention provides a technical solution: a waste gas recovery system applied to an electrostatic spraying process, comprising:

[0048] A bottom plate 1, a composite plate 11 is fixedly connected to the upper surface of the bottom plate 1 through a connecting rod, and a placement rack 12 and a recovery barrel 13 are fixedly connected to the upper surface of the bottom plate 1;

[0049] A shaft 2, the top end of the shaft 2 is rotatably connected to the lower surface of the composite plate 11, a spiral plate 21 is fixedly connected to the circumferential outer surface of the shaft 2, a middle ring body 22 is fixedly connected to the circumferential outer surface of the shaft 2, an upper ring body 23 and a lower ring body 24 are slidably sleeved on the circumferential outer surface of the shaft 2, a worm 25 is rotatably connected to the lower surface of the composite plate 11, and an air inlet pipe 27 and a U-shaped water pipe 28 are fixedly connected to the circumferential outer surface of the recovery cylinder 13;

[0050] In which, when the shaft 2 and the worm 25 rotate under the composite plate 11, the spiral plate 21 pushes the absorption liquid in the recovery cylinder 13 downward so that the downward-flowing absorption liquid produces resistance to the exhaust gas moving upward, and the rotating middle ring body 22 cuts the bubbles in the middle by splitting the middle ring 2231, the upper ring body 23 cuts the bubbles above the middle ring body 22 by splitting the upper ring 2331, and the lower ring body 24 cuts the bubbles below the middle ring body 22 by splitting the lower ring 2431.

[0051] The middle ring body 22 includes a middle inner ring 221 and a middle outer ring 222. The middle inner ring 221 is fixedly connected to the circumferential outer surface of the shaft rod 2, and the middle outer ring 222 is rotatably connected to the circumferential inner surface of the recovery barrel 13. A rotating middle rod 223 is rotatably connected between the middle inner ring 221 and the middle outer ring 222. A plurality of rotating middle rods 223 are provided and distributed in a circumferential array between the middle inner ring 221 and the middle outer ring 222.

[0052] Among them, a split middle ring 2231 is fixedly connected to the circumferential outer surface of the rotating middle rod 223, the end of the rotating middle rod 223 away from the middle inner ring 221 passes through the middle outer ring 222 and is fixedly connected to the middle gear 2232, and a middle gear ring 2233 matching the middle gear 2232 is fixedly connected to the circumferential inner surface of the recovery tube 13.

[0053] The top of the placement rack 12 is rotatably connected to a worm wheel 251, which is meshed with the worm 25, and transmission rods 252 are fixedly connected to both sides of the worm wheel 251. An upper rod 253 and a lower rod 254 are rotatably connected on the circumferential outer surface of the transmission rod 252.

[0054] The upper ring body 23 includes an upper inner ring 231 and an upper outer ring 232. The upper inner ring 231 is slidably sleeved on the circumferential outer surface of the shaft rod 2, and the upper outer ring 232 is slidably sleeved on the circumferential outer surface of the recovery barrel 13. A rotating upper rod 233 is rotatably connected between the upper inner ring 231 and the upper outer ring 232. A plurality of rotating upper rods 233 are provided and distributed in a circumferential array between the upper inner ring 231 and the upper outer ring 232.

[0055] Among them, a split upper ring 2331 is fixedly connected to the circumferential outer surface of the rotating upper rod 233, and one end of the rotating upper rod 233 away from the upper inner ring 231 passes through the upper outer ring 232 and the recovery cylinder 13 in sequence and is fixedly connected to an upper gear 2332, and an upper rack 2333 matching the upper gear 2332 is fixedly connected to the circumferential outer surface of the recovery cylinder 13;

[0056] Among them, one end of the upper rod 253 away from the transmission rod 252 is rotatably connected to the circumferential outer surface of the upper outer ring 232.

[0057] The lower ring body 24 includes a lower inner ring 241 and a lower outer ring 242. The lower inner ring 241 is slidably sleeved on the circumferential outer surface of the shaft rod 2, and the lower outer ring 242 is slidably sleeved on the circumferential outer surface of the recovery barrel 13. A rotating lower rod 243 is rotatably connected between the lower inner ring 241 and the lower outer ring 242. A plurality of rotating lower rods 243 are provided and distributed in a circular array between the lower inner ring 241 and the lower outer ring 242.

[0058] Among them, a split lower ring 2431 is fixedly connected to the circumferential outer surface of the rotating lower rod 243, and one end of the rotating lower rod 243 away from the lower inner ring 241 passes through the lower outer ring 242 and the recovery cylinder 13 in sequence and is fixedly connected to a lower gear 2432, and a lower rack 2433 matching the lower gear 2432 is fixedly connected to the circumferential outer surface of the recovery cylinder 13;

[0059] Among them, one end of the lower connecting rod 254 away from the transmission rod 252 is rotatably connected to the circumferential outer surface of the lower inner ring 241.

[0060] A vertical slide groove 26 is provided on the circumferential outer surface of the recovery cylinder 13 , and patches 261 for closing the vertical slide groove 26 are fixedly connected to the upper and lower sides of the upper ring body 23 and the lower ring body 24 .

[0061] The upper surface of the composite plate 11 is fixedly connected with a driving motor 3 , the output end of the driving motor 3 is fixedly connected with a worm 25 , and a driving belt 31 is drivingly sleeved on the circumferential outer surface of the worm 25 and the shaft 2 .

[0062] The process of reducing the speed of exhaust gas movement:

[0063] In actual application, the exhaust gas is taken into the inside of the recovery tube 13 through the air intake pipe 27. By starting the driving motor 3, the driving motor 3 drives the worm 25 to rotate between the bottom plate 1 and the composite plate 11 through the output end. Under the transmission action of the transmission belt 31, the worm 25 drives the two shafts 2 to rotate synchronously under the composite plate 11 through the transmission belt 31. The two shafts 2 drive the spiral plates 21 on their circumferential outer surfaces to rotate around the axis of the recovery tube 13. Under the rotation action of the spiral plates 21, the rotating spiral plates 21 push the absorption liquid above the inside of the recovery tube 13 to flow downward. Under the conveying action of the U-shaped water pipe 28, the absorption liquid below the inside of the recovery tube 13 is again transported to the bottom of the recovery tube 13 through the U-shaped water pipe 28. The exhaust gas flows above the recovery cylinder 13, so that the absorption liquid circulates between the recovery cylinder 13 and the U-shaped water pipe 28. When the exhaust gas moves upward from the bottom of the recovery cylinder 13 through the air inlet pipe 27, the absorption liquid flowing downward inside the recovery cylinder 13 hinders the upward movement of the exhaust gas, thereby reducing the movement speed of the exhaust gas in the absorption liquid. When the exhaust gas intake volume is large, the rotation speed of the shaft 2 under the composite plate 11 is increased to increase the resistance to the upward movement of the exhaust gas in the absorption liquid, thereby controlling the movement speed of the exhaust gas in the absorption liquid, extending the residence time of the exhaust gas in the absorption liquid, making the gas-liquid contact between the exhaust gas and the absorption liquid more complete, and improving the purification efficiency of the absorption liquid for the exhaust gas.

[0064] The process of cutting the middle exhaust gas bubble:

[0065] In actual applications, during the process of the shaft rod 2 rotating around the axis of the recovery drum 13, the shaft rod 2 drives the middle ring body 22 on its circumferential outer surface to rotate inside the recovery drum 13, so that the middle inner ring 221, the middle outer ring 222 and multiple rotating middle rods 223 rotate around the shaft rod 2 inside the recovery drum 13. While the multiple rotating middle rods 223 revolve around the shaft rod 2 inside the recovery drum 13, under the meshing action of the middle gear ring 2233 and the middle gear 2232, the multiple rotating middle rods 223 rotate on their own. The multiple rotating middle rods 223 drive the multiple divided middle rings 2231 on their circumferential outer surface to revolve around the shaft rod 2 and rotate around the rotating middle rod 223, so that the rotating divided middle rings 2231 cut the bubbles located in the middle of the absorption liquid, thereby making the gas-liquid contact between the exhaust gas and the absorption liquid more complete, thereby improving the purification efficiency of the absorption liquid for the exhaust gas.

[0066] The cutting process of the upper and lower exhaust gas bubbles:

[0067] In actual application, when the worm 25 rotates between the bottom plate 1 and the composite plate 11, the worm 25 drives the worm wheel 251 to rotate at the top of the placement rack 12, and the worm wheel 251 drives the transmission rods 252 on both sides thereof to rotate around the axis of the worm wheel 251. Under the limiting action of the vertical slide groove 26, the transmission rod 252 drives the upper outer ring 232 to slide downward along the outer surface of the recovery barrel 13 by connecting the upper rod 253, so that the upper outer ring 232 drives multiple rotating upper rods 233 to slide downward along the vertical slide groove 26, and multiple rotating upper rods 233 drive multiple upper gears 2332 to move downward synchronously. Under the meshing action of the upper gear 2332 and the upper rack 2333, the multiple rotating upper rods 233 rotate on their own, and the multiple rotating upper rods 233 drive the gears on their circumferential outer surfaces. Multiple segmented upper rings 2331 rotate around the axis of the rotating upper rod 233 and approach the middle ring body 22. After the transmission rod 252 rotates to the bottom of the worm gear 251, the transmission rod 252 begins to rotate upward. The transmission rod 252 drives the upper outer ring 232 to slide upward along the outer surface of the recovery tube 13 by connecting to the upper rod 253, so that the multiple rotating upper rods 233 drive the multiple segmented upper rings 2331 to rotate around the axis of the rotating upper rod 233 and gradually separate from the middle ring body 22; similarly, the rotating transmission rod 252 drives the multiple rotating lower rods 243 and the multiple segmented lower rings 2431 to rotate around the axis of the rotating lower rod 243 by connecting to the lower rod 254, and controls the multiple rotating segmented lower rings 2431 to gradually separate from the middle ring body 22 and then gradually approach the middle ring body 22.

[0068] The upper ring body 23 cuts the bubbles above the middle ring body 22 multiple times, and the lower ring body 24 cuts the bubbles below the middle ring body 22 multiple times, thereby enhancing the cutting effect on the bubbles in the absorption liquid, making the gas-liquid contact between the exhaust gas and the absorption liquid more complete, and improving the purification efficiency of the absorption liquid on the exhaust gas.

[0069] In summary, the present application has the following advantages by adopting the spiral plate 21, the middle ring body 22, the upper ring body 23 and the lower ring body 24:

[0070] Advantage 1: by accelerating the rotation speed of the shaft 2, the resistance encountered by the exhaust gas in the upward movement in the absorption liquid is increased, thereby controlling the movement speed of the exhaust gas in the absorption liquid, prolonging the residence time of the exhaust gas in the absorption liquid, making the gas-liquid contact between the exhaust gas and the absorption liquid more complete, and improving the purification efficiency of the absorption liquid for the exhaust gas.

[0071] Advantage 2: By controlling the middle ring body 22 to rotate inside the recovery tube 13, the rotating split middle ring 2231 can cut the bubbles located in the middle of the absorption liquid, thereby making the gas-liquid contact between the exhaust gas and the absorption liquid more complete, thereby improving the purification efficiency of the absorption liquid for the exhaust gas.

[0072] Advantage three, by controlling the upper ring body 23 and the lower ring body 24 to slide back and forth on the outer surface of the recovery cylinder 13, the upper ring body 23 cuts the bubbles above the middle ring body 22 multiple times, and the lower ring body 24 cuts the bubbles below the middle ring body 22 multiple times, thereby enhancing the cutting effect of the bubbles in the absorption liquid, making the gas-liquid contact between the exhaust gas and the absorption liquid more complete, and improving the purification efficiency of the absorption liquid for the exhaust gas.

[0073] Advantage four, by setting the vertical slide groove 26 and the patch 261, the rotating upper rod 233 and the rotating lower rod 243 pass through the side wall of the recovery cylinder 13 through the vertical slide groove 26, and when the upper ring body 23 and the lower ring body 24 slide back and forth up and down, the vertical slide groove 26 is sealed by setting the patches 261 on the upper and lower sides thereof to prevent the absorption liquid from overflowing to the outside of the recovery cylinder 13 through the vertical slide groove 26.

[0074] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A waste gas recovery system used in an electrostatic spraying process, characterized in that: include: A bottom plate (1), the upper surface of which is fixedly connected to a composite plate (11) via a connecting rod, and the upper surface of which is fixedly connected to a placement rack (12) and a recovery drum (13); A shaft (2), the top end of the shaft (2) is rotatably connected to the lower surface of the composite plate (11), a spiral plate (21) is fixedly connected to the circumferential outer surface of the shaft (2), a middle ring body (22) is fixedly connected to the circumferential outer surface of the shaft (2), an upper ring body (23) and a lower ring body (24) are slidably sleeved on the circumferential outer surface of the shaft (2), a worm (25) is rotatably connected to the lower surface of the composite plate (11), and an air intake pipe (27) and a U-shaped water pipe (28) are fixedly connected to the circumferential outer surface of the recovery cylinder (13); In the process of the shaft (2) and the worm (25) rotating under the composite plate (11), the spiral plate (21) pushes the absorption liquid in the recovery cylinder (13) downward so that the absorption liquid flowing downward generates resistance to the exhaust gas moving upward, the rotating middle ring body (22) cuts the bubbles located in the middle by splitting the middle ring (2231), the upper ring body (23) cuts the bubbles above the middle ring body (22) by splitting the upper ring (2331), and the lower ring body (24) cuts the bubbles below the middle ring body (22) by splitting the lower ring (2431).

2. The waste gas recovery system used in the electrostatic spraying process according to claim 1 is characterized in that: The middle ring body (22) comprises a middle inner ring (221) and a middle outer ring (222), wherein the middle inner ring (221) is fixedly connected to the circumferential outer surface of the shaft rod (2), and the middle outer ring (222) is rotatably connected to the circumferential inner surface of the recovery drum (13), and a rotating middle rod (223) is rotatably connected between the middle inner ring (221) and the middle outer ring (222), and a plurality of the rotating middle rods (223) are provided and distributed in a circumferential array between the middle inner ring (221) and the middle outer ring (222); Among them, a split middle ring (2231) is fixedly connected to the circumferential outer surface of the rotating middle rod (223), one end of the rotating middle rod (223) away from the middle inner ring (221) passes through the middle outer ring (222) and is fixedly connected to a middle gear (2232), and a middle gear ring (2233) that matches the middle gear (2232) is fixedly connected to the circumferential inner surface of the recovery cylinder (13).

3. The waste gas recovery system used in the electrostatic spraying process according to claim 1 is characterized in that: The top end of the placement rack (12) is rotatably connected to a worm wheel (251), the worm wheel (251) is meshingly connected to the worm (25), both sides of the worm wheel (251) are fixedly connected to a transmission rod (252), and an upper connecting rod (253) and a lower connecting rod (254) are rotatably connected on the circumferential outer surface of the transmission rod (252).

4. The waste gas recovery system used in the electrostatic spraying process according to claim 3 is characterized in that: The upper ring body (23) comprises an upper inner ring (231) and an upper outer ring (232), wherein the upper inner ring (231) is slidably sleeved on the circumferential outer surface of the shaft rod (2), and the upper outer ring (232) is slidably sleeved on the circumferential outer surface of the recovery barrel (13), and a rotating upper rod (233) is rotatably connected between the upper inner ring (231) and the upper outer ring (232), and a plurality of rotating upper rods (233) are provided and distributed in a circular array between the upper inner ring (231) and the upper outer ring (232); The split upper ring (2331) is fixedly connected to the circumferential outer surface of the rotating upper rod (233); one end of the rotating upper rod (233) away from the upper inner ring (231) passes through the upper outer ring (232) and the recovery drum (13) in sequence and is fixedly connected to an upper gear (2332); the circumferential outer surface of the recovery drum (13) is fixedly connected to an upper rack (2333) matched with the upper gear (2332); One end of the upper rod (253) away from the transmission rod (252) is rotatably connected to the circumferential outer surface of the upper outer ring (232).

5. The waste gas recovery system used in the electrostatic spraying process according to claim 3 is characterized in that: The lower ring body (24) comprises a lower inner ring (241) and a lower outer ring (242); the lower inner ring (241) is slidably sleeved on the circumferential outer surface of the shaft rod (2); the lower outer ring (242) is slidably sleeved on the circumferential outer surface of the recovery barrel (13); a rotating lower rod (243) is rotatably connected between the lower inner ring (241) and the lower outer ring (242); a plurality of rotating lower rods (243) are provided and distributed in a circular array between the lower inner ring (241) and the lower outer ring (242); The rotating lower rod (243) is fixedly connected to a split lower ring (2431) on its circumferential outer surface, and one end of the rotating lower rod (243) away from the lower inner ring (241) passes through the lower outer ring (242) and the recovery drum (13) in sequence and is fixedly connected to a lower gear (2432), and the recovery drum (13) is fixedly connected to a lower rack (2433) matched with the lower gear (2432) on its circumferential outer surface; Wherein, one end of the connecting lower rod (254) away from the transmission rod (252) is rotatably connected to the circumferential outer surface of the lower inner ring (241).

6. The waste gas recovery system used in the electrostatic spraying process according to claim 1 is characterized in that: A vertical slide groove (26) is provided on the circumferential outer surface of the recovery cylinder (13), and patches (261) for closing the vertical slide groove (26) are fixedly connected to the upper and lower sides of the upper ring body (23) and the lower ring body (24).

7. The waste gas recovery system used in the electrostatic spraying process according to claim 1 is characterized in that: A drive motor (3) is fixedly connected to the upper surface of the composite plate (11); an output end of the drive motor (3) is fixedly connected to a worm (25); and a drive belt (31) is drive-sleeved on the circumferential outer surfaces of the worm (25) and the shaft (2).

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