Screening device for returned lead-acid storage batteries

Abstract

A first protection assembly, a second protection assembly and a third protection assembly are arranged to serve as three levels of protection, if a small amount of acid liquid leaks from a returned battery, the returned battery makes contact with second alkali powder to be neutralized, and if the returned battery is exploded, when an outer frame is not damaged, the acid liquid does not make contact with the second alkali powder to be neutralized. The first alkali powder is matched with the leaked acid liquor for neutralization, if the explosion intensity is relatively high, the outer frame is damaged and relatively high heat is generated, the fire-fighting spray head sprays the alkali liquor for acid-base neutralization, and different protection levels are triggered according to different acid liquor leakage states, so that the potential safety hazard caused by the leakage of the acid liquor in the returned battery can be reduced, and the service life of the returned battery is prolonged. The waste of resources is avoided; and surface detection, internal detection and classified storage of the returned batteries are realized in sequence, the screening detection function is achieved, manual field operation is not needed, and the detection efficiency and safety are improved.

Description

Technical Field

[0001] The invention relates to the technical field of returned battery recycling, and in particular to a returned lead-acid battery screening device. Background Art

[0002] After 3-5 years of use, the discharge performance of lead-acid batteries gradually declines and cannot meet the standard of use. Among the battery packs that cannot meet the discharge time standard, most batteries still have great use value. This part of the returned lead-acid batteries has special characteristics. They are different from new batteries and scrapped and recycled batteries. They are in the middle of the battery life cycle. They have not completely lost their use value and their appearance is intact, but their performance no longer meets the original use requirements. This part of the lead-acid batteries is screened and combined for secondary use to improve the utilization efficiency of the batteries. The conventional screening method is to manually observe whether the battery surface is damaged, and use a battery comprehensive measuring instrument to test the performance of the returned batteries, including actual capacity, open circuit voltage and internal resistance tests.

[0003] Conventional manual screening requires inspectors to operate a comprehensive battery measuring instrument. The manual operation of the measuring instrument connector is to abut or clamp the battery electrode column. The measurement efficiency is low and there are no good protective measures, which is dangerous. Summary of the invention

[0004] In view of the above-mentioned defects or deficiencies in the prior art, it is desirable to provide a returned lead-acid battery screening device.

[0005] The present invention provides a returned lead-acid battery screening device, comprising a second belt conveyor, wherein the second belt conveyor is used to transport the returned batteries, and the transport direction thereof is a first direction. The screening device further comprises a testing mechanism disposed above the middle of the second belt conveyor, and the testing mechanism comprises:

[0006] The measuring assembly comprises a main support plate disposed above the middle of the second belt conveyor, the main support plate is provided with a measuring instrument body, the measuring instrument body has two measuring instrument connectors for connecting the returned battery electrodes, the main support plate is provided with a first linear driving member, the first linear driving member is used to drive the two measuring instrument connectors to approach or move away from the returned battery electrodes along a second direction, the first direction and the second direction are perpendicular to each other;

[0007] A first protective assembly comprises an outer frame disposed below the main support plate, an inner frame is disposed inside the outer frame, a telescopic end of the first linear drive member is connected to a top end of the outer frame, a measuring instrument connector is disposed inside the inner frame, a first alkali powder is filled between the inner frame and the outer frame, and a first protective film is disposed on an inner wall of the inner frame;

[0008] A second protection assembly is arranged on the second belt conveyor, comprising a triangular protection box filled with a second alkali powder, wherein a second protection film is arranged at the bottom end of the triangular protection box;

[0009] The third protection component comprises a liquid storage tank arranged on the main support plate, wherein the liquid storage tank is provided with alkaline solution, and a fire sprinkler is arranged at the bottom of the liquid storage tank.

[0010] According to the technical solution provided in the embodiment of the present application, the screening device further includes a first belt conveyor provided on one side of the second belt conveyor along the first direction, and a transmission component is further provided between the first belt conveyor and the second belt conveyor, and the transmission component is used to clamp the returned batteries and transport the returned batteries from the first belt conveyor to the second belt conveyor;

[0011] The screening device also includes a primary screening mechanism, including a second shooting component arranged between the first belt conveyor and the second belt conveyor, and two first shooting components respectively arranged above the ends of the first belt conveyor and the second belt conveyor where they are close to each other, the two first shooting components are used to shoot the two side surfaces and the top surface of the returned battery along the first direction, and the second shooting component is used to shoot the two side surfaces and the bottom surface of the returned battery along the third direction, and the first direction, the second direction and the third direction are perpendicular to each other.

[0012] According to the technical solution provided in the embodiment of the present application, the two first shooting assemblies each include a fixed rod, the axis extension direction of the fixed rod is a third direction, an adjustable sleeve is mounted in the middle of the two fixed rods, a first mounting plate is provided on the sides of the two adjustable sleeves close to each other, a first camera is provided on the two first mounting plates, and a locking bolt is threadedly connected through the side of each adjustable sleeve away from the corresponding first mounting plate.

[0013] According to the technical solution provided in the embodiment of the present application, the second shooting component includes:

[0014] A bottom plate is provided between the first belt conveyor and the second belt conveyor;

[0015] The adjusting structure comprises a screw rod arranged on the bottom plate, the axis extension direction of the screw rod is the third direction, two threaded areas with opposite rotation directions are arranged at both ends of the screw rod, the two threaded areas of the screw rod are connected to threaded sleeve blocks through threads, the top ends of the two threaded sleeve blocks are provided with limit connecting rods, and one end of the screw rod is provided with a third rotation driving member;

[0016] The shooting structure includes two second mounting plates, on which second cameras are arranged, and the two second mounting plates are hingedly connected to the top of the base plate at ends away from each other, and are hingedly connected to the top of the corresponding limiting connecting rods at ends close to each other, and the axis extension direction of each hinge shaft is the first direction.

[0017] According to the technical solution provided in the embodiment of the present application, the second belt conveyor is provided with a plurality of pushing components away from the first belt conveyor end along the first direction, each of the pushing components comprises a fixed plate provided on the second belt conveyor, and a third linear driving member provided on the fixed plate, and the third linear driving member is used to push the returned battery to move along the third direction;

[0018] Each of the pushing components is provided with a receiving component along one side of the third direction, and each of the receiving components includes a translation plate, a lower slide plate and a storage plate which are arranged in sequence toward the side away from the corresponding pushing component, and the translation plate is used to receive the returned batteries pushed by the corresponding pushing component. The receiving component is provided with a fourth protective component, and the fourth protective component is used to set a protective pad between two returned batteries.

[0019] According to the technical solution provided in the embodiment of the present application, the fourth protective component includes first support bars arranged at both ends of the translation plate along the first direction, and the top of the two first support bars is provided with a connecting shaft, and a clamping sleeve is rotatably mounted on the middle part of the connecting shaft, and the clamping sleeve is provided with a plurality of clamping groups, each of the clamping groups includes two clamping plates, and the extension direction of each of the clamping plates, the connecting shaft and the clamping sleeve is the first direction, and a protective pad can be clamped between the two clamping plates of each of the clamping groups.

[0020] According to the technical solution provided in the embodiment of the present application, the fourth protection component is provided with a feeding component along one side of the first direction, and the feeding component includes:

[0021] The storage part comprises a storage box, wherein a plurality of protective pads are arranged and stored inside the storage box along a third direction, wherein the storage box has a feeding end portion close to the second belt conveyor along the third direction, wherein one end of the feeding end portion close to the clamping sleeve along the first direction is provided with an outlet, and the other end thereof is provided with a second linear driving member, wherein the second linear driving member is used to push a protective pad along the outlet to be clamped between two clamping plates of the same clamping group;

[0022] The limiting part comprises a pressure plate arranged inside the storage box, a compression spring is arranged on the side of the pressure plate away from the protection pad, and the compression spring is connected to the inner wall of the storage box away from the end of the pressure plate.

[0023] According to the technical solution provided in the embodiment of the present application, a plurality of grooves are provided on the translation plate, the lower slide plate and the storage plate, a third alkali powder is stored in each of the grooves, and a third protective film is provided at the opening of the groove.

[0024] According to the technical solution provided in the embodiment of the present application, a second alarm is provided on the storage box near the receiving component side, and a first alarm is provided on the top of the main support plate.

[0025] According to the technical solution provided in the embodiment of the present application, a first positioner is provided at the first belt conveyor near the end of the second belt conveyor, a second positioner is provided at the middle of the second belt conveyor corresponding to the testing mechanism, and a third positioner is provided on each of the fixed plates.

[0026] Compared with the prior art, the beneficial effects of the present invention are:

[0027] 1. A preliminary screening mechanism is provided. Through the first shooting component and the second shooting component, the first shooting component can shoot the front and rear end faces and the top face of the returned battery. Under the cooperation of the first belt conveyor, the second belt conveyor and the transport component, the second shooting component can shoot the left and right sides and the bottom face of the returned battery, thereby completing the shooting of six faces, which is convenient for remote analysis of the defects of the returned battery. Manual inspection is not required, which improves the efficiency of the preliminary inspection and avoids the hidden danger of damage to the returned battery, which puts personnel in a dangerous environment. Furthermore, the adjustable sleeve and the locking bolt can adjust the shooting angle of the first camera, and then the shooting angle of the second camera can be adjusted through the cooperation of the screw and the threaded sleeve block, thereby facilitating the acquisition of a more suitable shooting angle, obtaining a more comprehensive image, and improving the judgment efficiency.

[0028] 2. A testing mechanism is set up, and the inner frame and the outer frame are driven to move downward by the first linear drive member, so that the measuring instrument connector contacts the motor of the returned battery, and the returned battery is tested through the detector body, without manual operation, thereby improving the inspection efficiency; further, a first protection component, a second protection component, and a third protection component are set up as three levels of protection. If a small amount of acid leaks from the returned battery, it is contacted with the second alkali powder for neutralization. If the returned battery explodes, when the outer frame is not damaged, the first alkali powder is used to neutralize the leaked acid. If the explosion intensity is large, the outer frame is damaged and generates a large amount of heat, the fire sprinkler sprays alkali liquid to neutralize the acid and alkali. By triggering different protection levels according to different acid leakage states, it can not only reduce the safety hazards caused by acid leakage in the returned battery, but also avoid waste of resources;

[0029] 3. A storage mechanism and a pushing component are provided. The returned batteries are pushed toward the translation plate through the third linear drive member, so that the returned batteries can be slid onto the storage plate along the lower slide plate. Different returned batteries are classified and stored according to the screening results, which are convenient for subsequent use or destruction. Furthermore, a fourth protective component is provided on the translation plate, which includes a rotatable clamping sleeve, a plurality of clamping plates and a protective pad. When the returned batteries move along the lower slide plate, the protective pads will be driven to separate from the clamping plates, so that the protective pads are attached to the sides of the returned batteries, thereby avoiding collision and damage of adjacent returned batteries and reducing safety hazards caused by collision. In addition, grooves and a third alkali powder are provided on the translation plate, the lower slide plate and the storage plate. If acid leaks from the returned batteries, it will also be neutralized with the third alkali powder, further reducing safety hazards.

[0030] 5. The alkaline substances in the first alkali powder, the second alkali powder, the third alkali and the alkali solution are all sodium bicarbonate, which can generate carbon dioxide after reacting with sulfuric acid in the returned battery, thus forming a foam state, which plays the role of inhibiting combustion and alerting the staff, and reduces safety hazards; further, the first alarm and the second alarm are set, and after detecting the increase in the local concentration of carbon dioxide, an alarm can be issued to the user, so as to further improve the effect of alerting the staff;

[0031] 6. A feeding assembly is provided, and a second linear drive member pushes the protective pad inside the storage box out from the exit, so that the protective pad is inserted between two clamping plates of a clamping group to clamp the protective pad, so as to continuously provide the protective pad to the fourth protective assembly and play a continuous protective role. A pressure plate and a clamping spring are also provided to make the pressure plate press the protective pad to ensure the stability of the protective pad, so as to facilitate the second linear drive member to push the protective pad more stably. Furthermore, a protective cloth, a winding shaft and a second torsion spring are provided to avoid interference from other protective pads when the push block is retracted, so as to ensure the stable pushing out and retraction of the push block. In addition, a positioning lever and a first torsion spring are also provided. When the protective pad is clamped between two clamping plates of a clamping group, it will swing with gravity and be limited by the positioning lever to ensure the accurate position of the protective pad. After the protective pad moves synchronously with the returned battery and disengages, the first torsion spring returns to the position of the positioning lever to achieve the purpose of repeated positioning.

[0032] To summarize, the surface inspection, internal inspection and classified storage of returned batteries are carried out in sequence to achieve the function of screening inspection. No manual on-site operation is required, which improves the inspection efficiency. Further, various protective components are used to reduce safety hazards and improve the safety of inspection.

[0033] It should be understood that the contents described in the summary of the invention are not intended to limit the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Other features, objects and advantages of the present invention will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings:

[0035] Figure 1 A schematic diagram of the structure of a returned lead-acid battery screening device provided in an embodiment of the present application;

[0036] Figure 2 A schematic diagram of the structure of a primary screening mechanism in a returned lead-acid battery screening device provided in an embodiment of the present application;

[0037] Figure 3A schematic diagram of the structure of a second shooting component in a returned lead-acid battery screening device provided in an embodiment of the present application;

[0038] Figure 4 A schematic diagram of the structure of a clamp assembly in a returned lead-acid battery screening device provided in an embodiment of the present application;

[0039] Figure 5 A schematic diagram of the structure of a railcar assembly in a returned lead-acid battery screening device provided in an embodiment of the present application;

[0040] Figure 6 A schematic diagram of the structure of a testing mechanism in a returned lead-acid battery screening device provided in an embodiment of the present application;

[0041] Figure 7 A schematic diagram of the structure of a first roller and a second roller in a returned lead-acid battery screening device provided in an embodiment of the present application;

[0042] Figure 8 for Figure 7 A magnified view of the local structure of area A in the middle;

[0043] Fig. 9 A schematic diagram of the structure of a first protective component in a returned lead-acid battery screening device provided in an embodiment of the present application;

[0044] Fig.10 A schematic diagram of the structure of a storage mechanism in a returned lead-acid battery screening device provided in an embodiment of the present application;

[0045] Fig.11 A schematic diagram of the structure of a feeding assembly in a returned lead-acid battery screening device provided in an embodiment of the present application;

[0046] Fig.12 for Fig.11 A magnified view of the local structure of the middle B area;

[0047] Fig.13 for Fig.11 A magnified view of the local structure of the middle C area;

[0048] Fig.14 A schematic diagram of the structure of a fourth protective component in a returned lead-acid battery screening device provided in an embodiment of the present application;

[0049] Fig.15 for Fig.14 A magnified view of the local structure of the D area in the middle.

[0050] Numbers in the figure:

[0051] 11. first belt conveyor; 111. first side plate; 112. first conveyor belt;

[0052] 12. second belt conveyor; 121. second side plate; 122. second conveyor belt;

[0053] 13. Transmission assembly; 131. First door frame; 132. Fixture assembly; 133. Railcar assembly;

[0054] 1321, main mounting plate; 1322, connecting plate; 1323, first driving gear; 1324, first rotating driving member; 1325, first connecting rod; 1326, first driven gear; 1327, clamping arm; 1328, second connecting rod; 1329, third connecting rod; 13210, clamping claw; 13211, second driven gear

[0055] 1331, vehicle plate; 1332, wheel axle; 1333, track wheel; 1334, third driven gear; 1335, second driving gear; 1336, second rotating driving member;

[0056] 14. Pushing assembly; 141. Fixing plate; 142. Third linear driving member;

[0057] 2. Preliminary screening mechanism; 21. Guiding component; 22. First shooting component; 23. Second shooting component;

[0058] 211, guide inclined plate; 212, side baffle; 213, L-shaped mounting rod;

[0059] 221, fixing rod; 222, adjustable sleeve; 223, locking bolt; 224, first mounting plate; 225, first camera;

[0060] 231, bottom plate; 232, first shaft seat; 233, first adjustment shaft; 234, second mounting plate; 235, second camera; 236, second shaft seat; 237, screw rod; 238, threaded sleeve block; 239, limit connecting rod; 2310, third shaft seat; 2311, second adjustment shaft; 2312, third rotating driving member;

[0061] 3. Testing mechanism; 31. Second door frame; 32. Main support plate; 33. First protection assembly; 34. Measuring instrument body; 35. First linear drive member; 36. Second protection assembly; 37. Third protection assembly;

[0062] 331, inner frame; 332, outer frame; 333, insulating column; 334, measuring instrument connector; 335, wire hole; 336, first protective film; 337, rectangular partition;

[0063] 361, first roller; 362, second roller; 363, triangular protective box; 364, second protective film;

[0064] 371, liquid storage tank; 372, fire sprinkler; 373, water injection valve; 374, air injection valve;

[0065] 4. Storage mechanism; 41. Receiving assembly; 42. Fourth protection assembly; 43. Feeding assembly;

[0066] 411, translation plate; 412, lower slide plate; 413, storage plate; 414, side protection plate; 415, channel;

[0067] 421, first support bar; 422, connecting shaft; 423, clamping sleeve; 424, clamping plate; 425, protective pad; 426, fourth shaft seat; 427, third adjusting shaft; 428, positioning lever; 429, first torsion spring;

[0068] 431, second support bar; 432, storage box; 433, outlet; 434, limit tube; 435, pressure plate; 436, compression spring; 437, second linear drive member; 438, push block; 439, protective cloth; 4310, reel; 4311, second torsion spring; 4312, avoidance channel; 4313, storage side groove; 4314, connection channel;

[0069] 51. First alarm; 52. Second alarm;

[0070] 61. First locator; 62. Second locator; 63. Third locator. DETAILED DESCRIPTION

[0071] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the relevant invention, rather than to limit the invention. It should also be noted that, for ease of description, only the parts related to the invention are shown in the accompanying drawings.

[0072] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0073] Please refer to Figure 1 to Figure 15 The embodiment of the present invention provides a returned lead-acid battery screening device, comprising a second belt conveyor 12, the second belt conveyor 12 is used to transport the returned batteries, and the transport direction is a first direction, wherein the second belt conveyor 12 comprises a second side plate 121 and a second conveyor belt 122, and the returned batteries are placed on the top surface of the second conveyor belt 122 for transport, and the first direction is Figure 1 In the front-to-back direction, the screening device also includes a testing mechanism 3 arranged above the middle of the second belt conveyor 12, and the testing mechanism 3 includes:

[0074] The measuring assembly includes a main support plate 32 disposed above the middle of the second belt conveyor 12, a measuring instrument body 34 is disposed on the main support plate 32, the measuring instrument body 34 has two measuring instrument connectors 334 for connecting the returned battery electrodes, and a first linear drive member 35 is disposed on the main support plate 32, the first linear drive member 35 is used to drive the two measuring instrument connectors 334 to approach or move away from the returned battery electrodes along a second direction, the first direction and the second direction are perpendicular to each other; wherein the second direction is Figure 1 In the vertical direction, the measuring instrument body 34 is the main part of the battery comprehensive measuring instrument, which can measure the actual capacity, open circuit voltage and internal resistance test of the returned battery. In addition, Figure 6 As shown, the second door frames 31 are installed on the two second side plates 121, and the main support plate 32 is detachably installed between the top ends of the two second door frames 31 to achieve the installation of the main support plate 32. Optionally, the first linear drive member 35 can be an electric push rod or a hydraulic push rod; in addition,

[0075] The first protective assembly 33 includes an outer frame 332 disposed below the main support plate 32, an inner frame 331 is disposed inside the outer frame 332, a telescopic end of a first linear drive member 35 is connected to the top of the outer frame 332, a measuring instrument connector 334 is disposed inside the inner frame 331, a first alkali powder is filled between the inner frame 331 and the outer frame 332, and a first protective film 336 is disposed on the inner wall of the inner frame 331; wherein, Figure 7 and Fig. 9 As shown, an insulating column 333 is provided between the inner frame 331 and the outer frame 332, and a measuring instrument connector 334 is provided at the bottom end of the insulating column 333. A wire hole 335 is provided inside the insulating column 333 for the connecting wire between the measuring instrument connector 334 and the measuring instrument body 34 to pass through. Then, when the first linear drive member 35 pushes the outer frame 332, the inner frame 331, the insulating column 333 and the measuring instrument connector 334 can be driven to move, so that the measuring instrument connector 334 can be in contact with the returned battery electrode, which is convenient for measurement by the battery comprehensive measuring instrument. Furthermore, a plurality of rectangular partitions 335 are arranged along the second direction between the inner frame 331 and the outer frame 332. 37, the first alkali powder is divided into multiple portions and placed on each rectangular partition 337 respectively, the first protective film 336 includes a plurality of strip-shaped branch films, and a strip-shaped branch film is provided at the inner wall of the inner frame 331 corresponding to a rectangular partition 337. When the returned battery explodes, the scattered acid will corrode the first protective film 336 and contact with the first alkali powder, so as to achieve the purpose of neutralizing the acid, play a safety protection role, and avoid the safety hazard caused by the leakage of the acid; optionally, the first alkali powder is sodium bicarbonate powder, which can generate carbon dioxide after reacting with sulfuric acid in the returned battery, thus forming a foam state, which plays the purpose of inhibiting combustion and warning the staff, and plays the effect of reducing safety hazards;

[0076] The second protection assembly 36 is arranged on the second belt conveyor 12, and includes a triangular protection box 363 filled with a second alkali powder, and a second protection film 364 is arranged at the bottom of the triangular protection box 363; wherein, the two ends of the triangular protection box 363 are respectively connected to the two second side plates 121, when the acid leaks onto the second conveyor belt 122, the accumulated acid will corrode the second protection film 364, and the second alkali powder inside the triangular protection box 363 will neutralize the leaked acid, thereby playing a safety protection role and avoiding the safety hazards caused by the acid leakage, such as Figure 7 and Figure 8 As shown, in order to prevent the triangular protection box 363 from interfering with the transportation of the returned batteries, the second protection assembly 36 also includes a plurality of second rollers 362 arranged on the second conveyor belt 122, the bottom end of each second roller 362 abuts against the top surface of the second conveyor belt 122, the axis of each second roller 362 extends in the left-right direction, and the triangular protection box 363 is arranged between adjacent second rollers 362; further, first rollers 361 are arranged on both sides of all second rollers 362 along the first direction, the first rollers 361 abut against the bottom end of the second conveyor belt 122, play a role of auxiliary support, and ensure the stable transmission of the second conveyor belt 122; optionally, the second alkali powder is sodium bicarbonate powder, which can generate carbon dioxide after reacting with sulfuric acid in the returned batteries, thereby forming a foam state, which plays a role in suppressing combustion and warning staff, and plays an effect of reducing safety hazards;

[0077] The third protection assembly 37 includes a liquid storage tank 371 disposed on the main support plate 32, the liquid storage tank 371 is provided with alkaline solution, and a fire sprinkler 372 is provided at the bottom of the liquid storage tank 371; Figure 6 and Figure 7 As shown, when abnormal conditions such as explosion and high temperature occur, the fire sprinkler 372 will spray alkali solution downward to achieve the purpose of neutralizing the leaked acid. In addition, a water injection valve 373 and an air injection valve 374 are provided at the top of the liquid storage tank 371. The alkali solution is replenished through the water injection valve 373, and gas is injected into the liquid storage tank 371 through the air injection valve 374 to increase the pressure inside the liquid storage tank 371, so that the alkali solution can be stably sprayed from the fire sprinkler 372; optionally, the alkali solution contains sodium bicarbonate, which can generate carbon dioxide after reacting with sulfuric acid in the returned battery, thereby forming a foam state, which serves the purpose of inhibiting combustion and alerting staff, and reduces safety hazards;

[0078] The three protection components serve as three levels of protection. If a small amount of acid leaks from the returned battery, it will be neutralized by contact with the second alkali powder. If the returned battery explodes, when the outer frame 332 is not damaged, the first alkali powder will be used to neutralize the leaked acid. If the explosion intensity is large, the outer frame 332 is damaged and generates a lot of heat, the fire sprinkler 372 will spray alkali solution to neutralize the acid and alkali. By triggering different protection levels according to different acid leakage states, it can not only reduce the safety hazards caused by acid leakage in the returned battery, but also avoid waste of resources.

[0079] In some embodiments, the screening device further includes a first belt conveyor 11 disposed on one side of the second belt conveyor 12 along the first direction, and a transmission component 13 is further disposed between the first belt conveyor 11 and the second belt conveyor 12, and the transmission component 13 is used to clamp the returned batteries and transport the returned batteries from the first belt conveyor 11 to the second belt conveyor 12;

[0080] The screening device further includes a primary screening mechanism 2, including a second shooting component 23 disposed between the first belt conveyor 11 and the second belt conveyor 12, and two first shooting components 22 respectively disposed above the ends of the first belt conveyor 11 and the second belt conveyor 12 close to each other, the two first shooting components 22 are used to shoot the two side surfaces and the top surface of the returned battery along the first direction, and the second shooting component 23 is used to shoot the two side surfaces and the bottom surface of the returned battery along the third direction, and the first direction, the second direction and the third direction are perpendicular to each other;

[0081] like Figure 1 and Figure 2 As shown, the third direction is Figure 1 In the left and right directions, the two first shooting components 22 and the second shooting component 23 can shoot six sides of the returned battery, and the collected images of the returned battery are transmitted to the remote terminal, which can be processed manually or by programming software to determine whether the surface is damaged. There is no need for personnel to turn over the returned battery on site, which improves the detection efficiency. Further use of visual recognition software or models to identify damaged areas can further improve the detection efficiency.

[0082] In some embodiments, the transmission component 13 includes two first portal frames 131, one end of the two first portal frames 131 is connected to the first belt conveyor 11, and the other end is connected to the second belt conveyor 12. A rail car component 133 is provided on the two first portal frames 131, and a clamp component 132 is provided at the bottom of the rail car component 133. The clamp component 132 clamps the returned battery on the first belt conveyor 11, and then the clamp component 132 and the returned battery are moved to the second belt conveyor 12 by the rail car component 133, and then the clamp component 132 releases the returned battery to complete the transportation of the returned battery. In this way, the bottom is suspended during the transportation process, and the second shooting component 23 shoots the bottom surface of the returned battery.

[0083] In some embodiments, the rail vehicle assembly 133 includes a vehicle plate 1331, two wheel axles 1332 passing through the vehicle plate 1331, and rail wheels 1333 are provided at both ends of the two wheel axles 1332. The rail wheels 1333 located on the same side of the vehicle plate 1331 are rotatably arranged on the top of a first door frame 131, and a third driven gear 1334 is provided on the outer sleeve of one wheel axle 1332. A second driving gear 1335 is meshedly connected to one side of the third driven gear 1334. A second rotating driving member 1336 is also provided on the top of the vehicle plate 1331. The second rotating driving member 1336 drives the second driving gear 1335 to rotate, thereby driving the third driven gear 1334 and the wheel axle 1332 to rotate; Figure 2 and Figure 6 As shown, when one wheel axle 1332 rotates, the track wheels 1333 at both ends thereof serve as driving wheels, and the track wheels 1333 at both ends of the other wheel axle 1332 serve as driven wheels, so as to achieve the purpose of the vehicle plate 1331 driving the clamp assembly 132 to move. In addition, the track wheel 1333 includes a wheel body and a limiting ring plate arranged at both ends of the wheel to ensure the stability of the track wheel 1333 during the movement; the second rotating driving member 1336 is a motor arranged at the top of the vehicle plate 1331, and the second driving gear 1335 is mounted on the output shaft end of the motor to achieve the driving purpose.

[0084] In some embodiments, the fixture assembly 132 includes a main mounting plate 1321, the top of the main mounting plate 1321 is connected to the vehicle plate 1331 through a connecting plate 1322, a first driving gear 1323 is provided on one side of the top of the main mounting plate 1321, and a first rotating driving member 1324 is provided on the other end surface, and the first rotating driving member 1324 is used to drive the first driving gear 1323 to rotate.

[0085] Two rotatable first connecting rods 1325 are provided at both ends of the middle part of the main mounting plate 1321 along the third direction. A second driven gear 13211 is provided at the connecting end of one of the first connecting rods 1325 and the main mounting plate 1321, and a first driven gear 1326 is provided at the connecting end of the other first connecting rod 1325 and the main mounting plate 1321. The first driven gear 1326 is meshed and connected with the second driven gear 13211 and the first driving gear 1323 respectively. Two second connecting rods 1328 are rotatably connected at both ends of the bottom of the main mounting plate 1321 along the third direction; the extension direction of each rotating axis of the first connecting rod 1325 and the second connecting rod 1328 is the first direction;

[0086] The clamp assembly 132 further includes two clamp arms 1327, the tops of the two clamp arms 1327 are rotatably connected to the two first connecting rods 1325 respectively, the middles of the two clamp arms 1327 are rotatably connected to the two second connecting rods 1328 respectively, and the bottoms of the two clamp arms 1327 are provided with clamping claws 13210 at the ends close to each other;

[0087] like Figure 2 and Figure 5 As shown, the first rotating driving member 1324 can select a motor, and the first driving gear 1323 is mounted on the output shaft end of the motor to achieve the driving purpose. The first rotating driving member 1324 drives the first driving gear 1323 to rotate, and through the meshing relationship, the first driven gear 1326 is first driven to rotate, and then the first driven gear 1326 drives the second driven gear 13211 to rotate, so as to achieve the purpose of swinging the two first connecting rods 1325. Further, the clamping arm 1327 is restricted by the second connecting rod 1328, so that the two clamping claws 13210 are close to each other to clamp the returned battery, so as to achieve the clamping purpose. Further, the main mounting plate 1321 is provided with There are several hollow grooves, and the first driven gear 1326 and the second driven gear 13211 are respectively molded with the two first connecting rods 1325, which reduces the number of parts, reduces manufacturing costs, and improves parts processing efficiency; in addition, four third connecting rods 1329 are provided, which are arranged on the side of the main mounting plate 1321 away from the first connecting rod 1325 and the second connecting rod 1328. The four third connecting rods 1329 correspond to the two second connecting rods 1328 and the two first connecting rods 1325 one by one, and the four third connecting rods 1329 are also connected to the corresponding rotating shafts of the four ones one by one, which improves the stability of the connection and avoids the loosening or damage of the connection caused by unilateral force.

[0088] In some embodiments, a guide assembly 21 is provided at the front end of the first belt conveyor 11. The guide assembly 21 includes an L-shaped mounting rod 213 provided on two first side plates 111. The L-shaped mounting rod 213 is provided with a side baffle 212 at the end close to each other. The side baffles 212 extend away from the transmission assembly 13 and away from each other to form a guide inclined plate 211. Figure 2As shown, the returned battery is guided by the guiding inclined plate 211 and is transported after being attached to the side baffle 212, so that the position is determined, which facilitates the subsequent clamp assembly 132 to clamp the returned battery.

[0089] In some embodiments, the two first shooting assemblies 22 each include a fixed rod 221, the axis of the fixed rod 221 extends in the third direction, an adjustable sleeve 222 is sleeved in the middle of the two fixed rods 221, a first mounting plate 224 is provided on the two adjustable sleeves 222 close to each other, a first camera 225 is provided on the two first mounting plates 224, and a locking bolt 223 is threadedly connected through the side of each adjustable sleeve 222 away from the corresponding first mounting plate 224;

[0090] like Figure 2 As shown, both ends of the fixed rod 221 are respectively connected to the two first door frames 131. By rotating the adjustable sleeve 222, the angle of the first mounting plate 224 can be adjusted, so as to facilitate adjusting the first camera 225 to a suitable shooting angle, obtain a more comprehensive image, and improve the judgment efficiency; the locking bolt 223 is rotated and abuts against the fixed rod 221 to achieve the locking purpose and improve the stability of the adjustable sleeve 222 after adjustment.

[0091] In some embodiments, the second photographing component 23 includes:

[0092] A bottom plate 231 is provided between the first belt conveyor 11 and the second belt conveyor 12;

[0093] The adjustment structure includes a screw 237 disposed on the bottom plate 231, the axis of the screw 237 extending in the third direction, two threaded areas with opposite rotation directions are disposed at both ends of the screw 237, the two threaded areas of the screw 237 are both connected to a threaded sleeve 238 through threads, the top ends of the two threaded sleeves 238 are both provided with a limiting connecting rod 239, and one end of the screw 237 is provided with a third rotation driving member 2312;

[0094] The shooting structure includes two second mounting plates 234, on which second cameras 235 are arranged, and the ends of the two second mounting plates 234 that are far away from each other are hingedly connected to the top of the bottom plate 231, and the ends of the two second mounting plates 234 that are close to each other are hingedly connected to the top of the corresponding limiting connecting rods 239, and the axis extension direction of each hinge axis is the first direction;

[0095] Among them, Figure 2 and Figure 3As shown, the third rotating driving member 2312 can drive the screw rod 237 to rotate, and through the action of the thread, drive the two threaded sleeves 238 to move closer to or away from each other, drive the second mounting plate 234 to lift or sink at the end close to each other, and adjust the angle of the second mounting plate 234, so as to adjust the second camera 235 to a suitable shooting angle, obtain a more comprehensive image, and improve the judgment efficiency; specifically, two second shaft seats 236 are provided on the bottom plate 231, and the screw rod 237 is installed in the second shaft seat 236. The ends of the two second mounting plates 234 that are away from each other are provided with a first adjustment shaft 233 Both ends of the first adjusting shaft 233 are rotatably connected to the first shaft seat 232, and the bottom end of the first shaft seat 232 is installed on the bottom plate 231, and the top of the limiting connecting rod 239 is provided with a second adjusting shaft 2311, and both ends of the second adjusting shaft 2311 are rotatably connected to the third shaft seat 2310, and the third shaft seat 2310 is installed at the bottom end of the second mounting plate 234, finally realizing a hinged connection; optionally, the third rotating driving member 2312 can use a screw block for manual adjustment. Preferably, the third rotating driving member 2312 can use a motor, which does not require manual adjustment and is more accurate.

[0096] In some embodiments, the second belt conveyor 12 is provided with a plurality of push assemblies 14 at an end away from the first belt conveyor 11 along the first direction, each push assembly 14 includes a fixed plate 141 provided on the second belt conveyor 12, and a third linear drive member 142 provided on the fixed plate 141, and the third linear drive member 142 is used to push the returned battery to move along the third direction;

[0097] Each push assembly 14 is provided with a receiving assembly 41 on one side along the third direction. Each receiving assembly 41 includes a translation plate 411, a lower slide plate 412 and a storage plate 413 which are sequentially arranged toward the side away from the corresponding push assembly 14. The translation plate 411 is used to receive the returned battery pushed by the corresponding push assembly 14. A fourth protection assembly 42 is provided on the receiving assembly 41. The fourth protection assembly 42 is used to set a protection pad 425 between two returned batteries.

[0098] like Fig.10 and Fig.14 As shown, the third linear drive member 142 can be an electric push rod or a hydraulic push rod. The third linear drive member 142 pushes the returned battery to move to the left, and the returned battery will enter the lower slide plate 412 along the translation plate 411, and finally slide onto the storage plate 413 to achieve storage. According to the standards of the returned batteries after inspection, the returned batteries of different standards are classified and stored for convenient secondary utilization or destruction. Furthermore, the fourth protective component 42 can set a protective pad 425 between the two returned batteries to play a protective role, avoid the two returned batteries from colliding with each other and causing damage, and improve the safety of the returned batteries during classified storage.

[0099] In some embodiments, the fourth protection component 42 includes first support bars 421 provided at both ends of the translation plate 411 along the first direction, the tops of the two first support bars 421 are provided with connecting shafts 422, the middle of the connecting shaft 422 is rotatably sleeved with a clamping sleeve 423, the clamping sleeve 423 is provided with a plurality of clamping groups, each clamping group includes two clamping plates 424, the extension direction of each clamping plate 424, the connecting shaft 422 and the clamping sleeve 423 is the first direction, and a protective pad 425 can be clamped between the two clamping plates 424 of each clamping group;

[0100] like Fig.10 and Fig.14 As shown, after a protective pad 425 is clamped onto two clamping plates 424, the clamping sleeve 423 rotates under the action of gravity, causing the protective pad 425 to swing downward, that is, between the two first support bars 421. When the returned battery moves from the translation plate 411 toward the lower slide plate 412 and moves downward along the lower slide plate 412, the protective pad 425 will be driven to separate from the two clamping plates 424 and move with the returned battery, so that the returned battery sliding down will not collide with another returned battery, thereby playing a protective role. In addition, side protective plates 414 are provided on the front and rear sides of the translation plate 411, the lower slide plate 412 and the storage plate 413 to play a role of limiting protection and prevent the returned batteries from falling off, and two first support bars 421 are arranged on the side protective plates 414 to avoid interfering with the movement of the returned batteries. Furthermore, the first support bar 421 is located between the translation plate 411 and the lower slide plate 412. When the protective pad 425 swings to the bottom of the clamping sleeve 423, it is easier for the returned battery to push the protective pad 425.

[0101] In some embodiments, two fourth shaft seats 426 are provided at the ends close to each other of the two first support bars 421, and a third adjustment shaft 427 is rotatably connected between the two fourth shaft seats 426 of the same first support bar 421, and the extension direction of each third adjustment shaft 427 is the vertical direction. A positioning lever 428 is provided in the middle of each third adjustment shaft 427, and each positioning lever 428 extends away from the corresponding first support bar 421. First torsion springs 429 are mounted at both ends of each third adjustment shaft 427, and one end of each first torsion spring 429 is connected to the corresponding fourth shaft seat 426, and the other end is connected to the corresponding first support bar 421; Fig.14 and Fig.15 As shown, excessive swinging of the protective pad 425 is avoided by limiting it through the positioning stopper rod 428 .

[0102] In some embodiments, a feeding assembly 43 is provided on one side of the fourth protection assembly 42 along the first direction, and the feeding assembly 43 includes:

[0103] The storage part includes a storage box 432, wherein a plurality of protective pads 425 are arranged and stored along a third direction inside the storage box 432, and the storage box 432 has a feeding end portion along the third direction close to the second belt conveyor 12, and an outlet 433 is provided at one end of the feeding end portion along the first direction close to the clamping sleeve 423, and a second linear driving member 437 is provided at the other end thereof, and the second linear driving member 437 is used to push a protective pad 425 along the outlet 433 to be clamped between two clamping plates 424 of the same clamping group; wherein a second supporting bar 431 is further provided at the bottom end of the storage box 432 to improve the supporting effect, thereby improving the stability of the storage box 432;

[0104] The limiting part includes a pressure plate 435 disposed inside the storage box 432, a compression spring 436 is disposed on the side of the pressure plate 435 away from the protective pad 425, and the end of the compression spring 436 away from the pressure plate 435 is connected to the inner wall of the storage box 432;

[0105] like Fig.10 and Fig.11 As shown, the pressure plate 435 is pushed toward the outlet 433 end by the compression spring 436, and then the protective pad 425 on the inner wall of the storage box 432 is pushed by the second linear drive component 437, and the protective pad 425 is clamped between the two clamping plates 424 of the same clamping group along the outlet 433, so as to achieve the purpose of installing the protective pad 425. Optionally, the second linear drive component 437 can use a chain window opener, an electric push rod or a hydraulic push rod, among which the chain window opener is used, which occupies less space and avoids the situation where the storage box 432 has an unstable connection due to the excessive force arm of the storage box 432; in addition, a limiting tube 434 is also provided at the end of the pressure plate 435 away from the protective pad 425, and the limiting tube 434 passes through the side wall of the storage box 432, and the stability of the pressure plate 435 during movement is ensured by the limiting tube 434.

[0106] In some embodiments, the telescopic portion of the second linear drive member 437 is provided with a push block 438, and the storage box 432 is provided with an avoidance channel 4312, and the telescopic portion of the second linear drive member 437 passes through the avoidance channel 4312 and extends into the storage box 432; in addition, an inner wall of the storage box 432 is also provided with a storage side groove 4313, and a connecting channel 4314 is provided between the storage side groove 4313 and the avoidance channel 4312, and a rotatable winding shaft 4310 is provided in the storage side groove 4313, and a protective cloth 439 is rolled up on the winding shaft 4310, and the protective cloth 439 passes through the connecting channel 4314 and is connected to the push block 438, and second torsion springs 4311 are provided at both ends of the winding shaft 4310, and one end of the second torsion spring 4311 is connected to the winding shaft 4310, and the other end is connected to the inner wall of the storage side groove 4313;

[0107] like Fig.11 , Fig.12 and Fig.13As shown, when the push block 438 pushes the protective pad 425, the winding shaft 4310 rotates, the second torsion spring 4311 is deformed, and the protective cloth 439 stretches. When the protective pad 425 is withdrawn, the clamping spring 436 pushes the pressure plate 435 to push the other protective pad 425 toward the protective cloth 439. As the push block 438 contracts, the winding shaft 4310 rotates in the opposite direction, the second torsion spring 4311 recovers its deformation, and the protective cloth 439 contracts. During this process, the protective pad 425 always abuts against the protective cloth 439 and will not interfere with the retraction of the push block 438. If the protective cloth 439 is not provided, the protective pad 425 will abut against the telescopic part of the second linear drive member 437 and the push block 438, interfering with the normal contraction of the push block 438.

[0108] In some embodiments, a plurality of grooves 415 are provided on the translation plate 411, the lower slide plate 412 and the storage plate 413, and a third alkali powder is stored in each groove 415, and a third protective film is provided at the opening of the groove 415;

[0109] like Fig.10 and Fig.14 As shown, when the returned battery leaks, the third protective film will be corroded, and the third alkali powder will react with the leaked acid to neutralize the leaked acid, thereby playing a safety protection role and avoiding safety hazards caused by acid leakage; optionally, the third alkali powder is sodium bicarbonate powder, which can generate carbon dioxide after reacting with sulfuric acid in the returned battery, thus forming a foam state, which plays a role in suppressing combustion and alerting staff, thereby reducing safety hazards.

[0110] In some embodiments, a second alarm 52 is provided on the storage box 432 near the receiving assembly 41 , and a first alarm 51 is provided on the top of the main support plate 32 ;

[0111] like Figure 1 As shown, the first alarm 51 and the second alarm 52 are carbon dioxide alarms. When the first alkali powder or the second alkali powder or the third alkali powder or one of the alkali liquid reacts with the acid to neutralize, carbon dioxide will be generated, causing the local carbon dioxide concentration to increase, triggering the concentration warning line of the carbon dioxide alarm, and sending an alarm signal to the customer.

[0112] In some embodiments, a first locator 61 is provided at the end of the first belt conveyor 11 close to the second belt conveyor 12, a second locator 62 is provided at the middle of the second belt conveyor 12 corresponding to the testing mechanism 3, and a third locator 63 is provided on each fixing plate 141;

[0113] like Figure 1As shown, the first positioner 61 detects the returned battery, starts the rail car assembly 133 and the clamp assembly 132 to drive the returned battery for transportation, and the initial screening mechanism 2 collects images of the returned battery. When the second positioner 62 detects the returned battery, the testing mechanism 3 is used to detect relevant parameters of the returned battery. When the third positioner 63 detects the returned battery, it will determine whether to enable the third linear drive member 142. If enabled, the returned battery will be pushed to the storage mechanism 4 for storage.

[0114] In some embodiments, electrical components such as the first belt conveyor 11, the second belt conveyor 12, the first rotating drive member 1324, the second rotating drive member 1336, the first camera 225, the second camera 235 and the measuring instrument body 34 are all controlled by a remote terminal, which controls each electrical component to start and stop according to corresponding conditions through programming to achieve automated operation. The programming method and the start and stop condition settings are commonly used techniques and will not be elaborated here.

[0115] The process of detecting a returned battery of the present invention is as follows:

[0116] Step 1: Start the first belt conveyor 11 and the second belt conveyor 12, place the returned battery on the first conveyor belt 112 of the first belt conveyor 11, and adjust the returned battery to a preset position through the guide assembly 21;

[0117] Step 2: When the first locator 61 detects the returned battery, the first belt conveyor 11 is shut down, and the railcar assembly 133 and the clamp assembly 132 are started. The clamp assembly 132 clamps the returned battery, and the railcar assembly 133 transports the two to the second belt conveyor 12;

[0118] Step 3: During the movement of the railcar assembly 133, the first camera 225 photographs the front, back and top surfaces of the returned battery, and the second camera 235 photographs the left, right and bottom surfaces of the returned battery, and transmits the image information to the remote terminal, which identifies the specifications, models and damage of the returned battery through a visual recognition model or software; if the degree of damage is lower than a preset value, step 4 is executed; if the degree of damage is higher than a preset value, it is marked as a damaged product and step 6 is executed;

[0119] Step 4: When the second positioner 62 detects the returned battery, the second belt conveyor 12 is stopped, and the first linear drive member 35 is started. The inner frame 331 and the outer frame 332 are driven downward by the first linear drive member 35, so that the measuring instrument connector 334 on the insulating column 333 abuts against the electrode of the returned battery, and then the returned battery is detected by the measuring instrument body 34. The parameters obtained include but are not limited to the actual capacity, open circuit voltage and internal resistance test of the returned battery. If the actual capacity is lower than the preset value, it is marked as recyclable, and if the actual capacity is higher than the preset value, it is marked as reusable.

[0120] Step 5: Start the first linear drive member 35 to reset the inner frame 331 and the outer frame 332, and start the second belt conveyor 12 again;

[0121] Step 6: If the returned battery has been inspected before, skip this step, start the second linear drive member 437 to push the protective pad 425 in the storage box 432 between the two clamping plates 424, and the protective pad 425 drives the clamping sleeve 423 to rotate under the action of gravity, so that the protective pad 425 swings to the bottom of the clamping sleeve 423;

[0122] Step 7: Start the second linear drive member 437 to push the protective pad 425 in the storage box 432 between the two clamping plates 424, and the protective pad 425 is used as a spare pad for this time;

[0123] Step 8, three push components 14 and storage mechanisms 4 are set, the first one corresponds to damaged products, the second one corresponds to recyclable products, and the third one corresponds to reusable products; when the returned battery detected this time is marked as a damaged product, the corresponding third positioner 63 on the push component 14 is started, and when the damaged product is detected by the third positioner 63, the third linear drive member 142 is started to store the damaged product in the corresponding storage mechanism 4; for other marked returned batteries, the corresponding third positioner 63 is started, and the returned batteries are stored in the corresponding storage mechanism 4 through the corresponding third linear drive member 142;

[0124] Step nine, when the returned battery moves along the translation plate 411 and the lower slide plate 412 toward the storage plate 413, the protective pad 425 under the clamping sleeve 423 will detach from the two clamping plates 424, so that the returned battery stored this time will not collide with the returned battery stored previously; at the same time, it will drive the clamping sleeve 423 to rotate, and swing the spare pad to the bottom of the clamping sleeve 423, waiting for the next use.

[0125] In the description of this specification, the terms "connection", "installation", "fixation" and the like should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0126] In the description of this specification, the description of the terms "one embodiment", "some embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0127] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A device for screening returned lead-acid batteries, characterized in that: The second belt conveyor (12) is used to transport the returned batteries, and the transport direction is a first direction. The screening device also includes a testing mechanism (3) arranged above the middle of the second belt conveyor (12), and the testing mechanism (3) includes: A measuring assembly, comprising a main support plate (32) arranged above the middle of the second belt conveyor (12), a measuring instrument body (34) being arranged on the main support plate (32), the measuring instrument body (34) having two measuring instrument connectors (334) for connecting to electrodes of returned batteries, a first linear drive member (35) being arranged on the main support plate (32), the first linear drive member (35) being used to drive the two measuring instrument connectors (334) to approach or move away from the electrodes of returned batteries along a second direction, the first direction and the second direction being perpendicular to each other; A first protective component (33) comprises an outer frame (332) arranged below the main support plate (32), an inner frame (331) is arranged inside the outer frame (332), a telescopic end of the first linear drive member (35) is connected to the top of the outer frame (332), a measuring instrument connector (334) is arranged inside the inner frame (331), a first alkali powder is filled between the inner frame (331) and the outer frame (332), and a first protective film (336) is arranged on the inner wall of the inner frame (331); A second protection assembly (36) is disposed on the second belt conveyor (12), comprising a triangular protection box (363) filled with a second alkali powder, wherein a second protection film (364) is disposed at the bottom end of the triangular protection box (363); The third protection component (37) comprises a liquid storage tank (371) arranged on the main support plate (32), wherein alkaline solution is arranged in the liquid storage tank (371), and a fire sprinkler (372) is arranged at the bottom end of the liquid storage tank (371).

2. The returned lead-acid battery screening device according to claim 1, characterized in that: The screening device further comprises a first belt conveyor (11) arranged on one side of the second belt conveyor (12) along the first direction, a transmission component (13) is further arranged between the first belt conveyor (11) and the second belt conveyor (12), and the transmission component (13) is used to clamp the returned batteries and transport the returned batteries from the first belt conveyor (11) to the second belt conveyor (12); The screening device further comprises a primary screening mechanism (2), comprising a second photographing assembly (23) arranged between the first belt conveyor (11) and the second belt conveyor (12), and two first photographing assemblies (22) respectively arranged above the ends of the first belt conveyor (11) and the second belt conveyor (12) close to each other, the two first photographing assemblies (22) being used to photograph the two side surfaces and the top surface of the returned battery along a first direction, and the second photographing assembly (23) being used to photograph the two side surfaces and the bottom surface of the returned battery along a third direction, the first direction, the second direction and the third direction being perpendicular to each other.

3. The returned lead-acid battery screening device according to claim 2, characterized in that: The two first shooting assemblies (22) each comprise a fixed rod (221), the axis of the fixed rod (221) extending in a third direction, an adjustable sleeve (222) being sleeved in the middle of the two fixed rods (221), a first mounting plate (224) being provided on the sides of the two adjustable sleeves (222) close to each other, a first camera (225) being provided on the two first mounting plates (224), and a locking bolt (223) being threadedly connected through the side of each adjustable sleeve (222) away from the corresponding first mounting plate (224).

4. The returned lead-acid battery screening device according to claim 3, characterized in that: The second shooting component (23) comprises: A bottom plate (231) is provided between the first belt conveyor (11) and the second belt conveyor (12); The adjusting structure comprises a screw (237) arranged on a bottom plate (231), the axis of the screw (237) extending in a third direction, two threaded areas with opposite rotation directions are arranged at two ends of the screw (237), the two threaded areas of the screw (237) are both connected to a threaded sleeve (238) through threads, the top ends of the two threaded sleeves (238) are both provided with a limiting connecting rod (239), and one end of the screw (237) is provided with a third rotating driving member (2312); The shooting structure comprises two second mounting plates (234), on which second cameras (235) are arranged, and the ends of the two second mounting plates (234) that are far away from each other are hingedly connected to the top of a bottom plate (231), and the ends of the two second mounting plates (234) that are close to each other are hingedly connected to the top of a corresponding limiting connecting rod (239), and the axis extension direction of each hinge shaft is a first direction.

5. The returned lead-acid battery screening device according to claim 2, characterized in that: The second belt conveyor (12) is provided with a plurality of push assemblies (14) at an end away from the first belt conveyor (11) along the first direction, each of the push assemblies (14) comprising a fixed plate (141) provided on the second belt conveyor (12), and a third linear drive member (142) provided on the fixed plate (141), the third linear drive member (142) being used to push the returned battery to move along the third direction; Each of the pushing components (14) is provided with a receiving component (41) on one side along the third direction, and each of the receiving components (41) comprises a translation plate (411), a lower slide plate (412) and a storage plate (413) which are sequentially arranged toward a side away from the corresponding pushing component (14), and the translation plate (411) is used to receive the returned battery pushed by the corresponding pushing component (14). A fourth protective component (42) is provided on the receiving component (41), and the fourth protective component (42) is used to set a protective pad (425) between two returned batteries.

6. The returned lead-acid battery screening device according to claim 5, characterized in that: The fourth protection component (42) comprises first support bars (421) arranged at both ends of the translation plate (411) along the first direction. The top ends of the two first support bars (421) are provided with connecting shafts (422). The middle part of the connecting shaft (422) is rotatably sleeved with a clamping sleeve (423). The clamping sleeve (423) is provided with a plurality of clamping groups. Each of the clamping groups comprises two clamping plates (424). The extension direction of each of the clamping plates (424), the connecting shaft (422) and the clamping sleeve (423) is the first direction. A protection pad (425) can be clamped between the two clamping plates (424) of each clamping group.

7. The returned lead-acid battery screening device according to claim 6, characterized in that: The fourth protection component (42) is provided with a feeding component (43) along one side of the first direction, and the feeding component (43) comprises: A storage portion, comprising a storage box (432), wherein a plurality of protective pads (425) are arranged and stored inside the storage box (432) along a third direction, wherein the storage box (432) has a feeding end portion close to the second belt conveyor (12) along the third direction, wherein one end of the feeding end portion close to the clamping sleeve (423) along the first direction is provided with an outlet (433), and the other end thereof is provided with a second linear drive member (437), wherein the second linear drive member (437) is used to push a protective pad (425) along the outlet (433) to be clamped between two clamping plates (424) of the same clamping group; The limiting part includes a pressure plate (435) arranged inside the storage box (432), and a compression spring (436) is provided on the side of the pressure plate (435) away from the protective pad (425), and the end of the compression spring (436) away from the pressure plate (435) is connected to the inner wall of the storage box (432).

8. The returned lead-acid battery screening device according to claim 6, characterized in that: A plurality of grooves (415) are provided on the translation plate (411), the lower slide plate (412) and the storage plate (413), each groove (415) stores a third alkali powder, and a third protective film is provided at the opening of the groove (415).

9. The returned lead-acid battery screening device according to claim 7, characterized in that: The storage box (432) is provided with a second alarm (52) on the side close to the receiving assembly (41), and the top end of the main support plate (32) is provided with a first alarm (51).

10. The returned lead-acid battery screening device according to claim 5, characterized in that: The first belt conveyor (11) is provided with a first positioner (61) near the end of the second belt conveyor (12), a second positioner (62) is provided at the middle of the second belt conveyor (12) corresponding to the testing mechanism (3), and each of the fixed plates (141) is provided with a third positioner (63).

Images