Battery sewage treatment and drainage device

By using the drive assembly in the lithium battery sewage treatment device to extrude and crush the flocculant and stir the stirring assembly, the problem of poor mixing effect caused by flocculant agglomeration is solved, and the full mixing and efficient treatment of flocculant and sewage are achieved , meet emission standards.

CN119191503APending Publication Date: 2024-12-27CHENZHOU NAIPU POWER SUPPLY CO LTD
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Patent Information

Application Number
CN202411454794.9
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-10-17
Publication Date
2024-12-27

AI Technical Summary

Technical Problem

In existing lithium battery sewage treatment devices, flocculants are prone to agglomeration, resulting in poor mixing effect with sewage and cannot meet emission standards.

Method used

A battery sewage treatment and drainage device is designed, using a driving component to squeeze and crush the agglomerated flocculant, and fully mix the flocculant and sewage through the agitating component, including installing the agitating component on the treatment tank and setting a cavity in the box. The body, pressure plate and drive assembly are used to squeeze and crush the flocculant through the screw, gear and rack drive plate, and the opening and closing of the lower end of the cavity is controlled by the opening and closing assembly.

Benefits of technology

It effectively shortens the dissolution time of flocculant, improves the mixing effect of flocculant and sewage, ensures that flocculant can better treat sewage and meets emission standards.

✦ Generated by Eureka AI based on patent content.

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Abstract

The invention relates to the technical field of battery sewage treatment, and discloses a battery sewage treatment drainage device which comprises a treatment tank, a mounting plate is arranged at the upper end of the treatment tank, a stirring assembly used for stirring sewage in the treatment tank is arranged on the mounting plate, and a box body is further arranged on the upper end face of the mounting plate. A cavity with two open ends and used for containing a flocculant is formed in the box body, the lower end of the cavity is communicated with the treatment tank, opposite pressing plates are arranged in the cavity, a cavity is formed in one side wall of the box body, a driving assembly used for driving the two pressing plates to crush the agglomerated flocculant is arranged in the cavity, and an opening and closing assembly is further arranged on the mounting plate. By means of the structure, the two pressing plates are driven by the driving assembly to extrude and crush the agglomerated flocculating agent, so that the agglomerated flocculating agent is prevented from being added into the treatment cavity to be mixed with sewage, the mixing effect of the flocculating agent and the sewage is better, and then the sewage treatment effect of the flocculating agent is better.
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Description

Technical Field

[0001] The present invention relates to the technical field of battery wastewater treatment, in particular to a battery wastewater treatment drainage device. Background Art

[0002] A large amount of wastewater is generated during the processing and production of lithium batteries. In order to make the wastewater meet the national emission standards, the wastewater needs to be treated before it can be discharged. The existing methods of treating wastewater include using flocculants to flocculate and precipitate the wastewater.

[0003] For example, the patent with announcement number CN218145999U discloses a sewage treatment device for lithium battery mass production workshops. Although the sewage treatment device for lithium battery mass production workshops can ensure the full mixing of flocculant and sewage and improve the sewage treatment effect by rotating the first stirring rod and the second stirring rod in opposite directions; however, when the sewage treatment device for lithium battery mass production workshops is actually used, the flocculant is easy to agglomerate. When the agglomerated flocculant enters the reaction tank from the dosing pipe, the agglomerated flocculant is not easy to be fully mixed with the sewage, resulting in a poor mixing effect of the flocculant and sewage, so it needs to be improved. Summary of the invention

[0004] The object of the present invention is to provide a battery wastewater treatment and drainage device to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A battery sewage treatment and drainage device comprises a treatment tank, wherein a mounting plate is provided at the upper end of the treatment tank, a stirring assembly for stirring the sewage in the treatment tank is provided on the mounting plate, a box body is also provided on the upper end surface of the mounting plate, a cavity with openings at both ends and used for containing flocculant is opened in the box body, the lower end of the cavity is connected to the treatment tank, relative pressure plates are provided in the cavity, a cavity is also provided in the box body, a driving assembly for driving two pressure plates to break up agglomerated flocculant is provided in the cavity, and an opening and closing assembly for opening and closing the opening at the lower end of the cavity is also provided at the lower end of the box body.

[0007] Preferably, the driving assembly includes a screw rod that is relatively arranged in the cavity and can rotate, one end of the screw rod extends into the cavity and the thread passes through the two pressure plates. The two screw rods rotate synchronously to drive the two pressure plates to move closer to or away from each other. A rotating part is also provided in the cavity to drive the two screw rods to rotate synchronously.

[0008] Preferably, the screw rods in the cavity are sleeved with gears;

[0009] The rotating member includes a slidable rack disposed between the two gears, the side wall of the rack being meshed with the corresponding gear, and the movement of the rack is used to drive the two gears to rotate, thereby realizing the rotation of the two screw rods.

[0010] Preferably, a moving groove is opened on the side wall of the box body along the moving direction of the rack, a moving rod with one end extending out of the moving groove is provided on the rack, and a shifting block for driving the rack to move is provided on the moving rod.

[0011] Preferably, a round rod with one end passing through the rack is provided in the cavity, and a spring for pushing the rack to move upward is sleeved on the round rod.

[0012] Preferably, a sliding groove with one end penetrating the box body is provided on one side wall of the cavity;

[0013] The opening and closing assembly includes an opening and closing plate which is arranged on the mounting plate and can slide. One end of the opening and closing plate passes through the slide groove and slides into or out of the cavity, so that the opening and closing plate can open and close the opening at the lower end of the cavity. A positioning piece is also provided on the side wall of the box body, and the positioning piece is used to position the opening and closing plate which slides into the cavity.

[0014] Preferably, a fixing plate is provided on the other end of the opening and closing plate;

[0015] The positioning member includes a positioning box arranged on the side wall of the box body. A positioning rod with one end extending out is installed in the positioning box through a torsion spring. A positioning plate is provided at the extended end of the positioning rod. The torsion spring is used to drive the positioning plate on the positioning rod to abut against the fixed plate to realize the positioning of the positioning plate on the opening and closing plate.

[0016] Preferably, the stirring assembly includes a rotatable rotating rod disposed on the lower end surface of the mounting plate, a plurality of stirring rods are provided on the rotating rod along its height direction, and the rotation of the rotating rod is used to drive the stirring rod to stir the sewage in the treatment tank.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. The present invention squeezes and crushes the agglomerated flocculant by driving two pressure plates of the assembly, thereby preventing the agglomerated flocculant from being added into the treatment chamber and mixed with sewage. Compared with the existing ones, the battery sewage treatment and drainage device can squeeze and crush the agglomerated flocculant during actual use, shorten the dissolution time of the agglomerated flocculant, and achieve a better mixing effect of the flocculant and sewage, thereby achieving a better mixing effect of the flocculant on the sewage.

[0019] 2. In the present invention, a plurality of protrusions are installed on the opposite side walls of the two pressing plates. When the two pressing plates squeeze the agglomerated flocculant, the agglomerated flocculant can be better broken up by the protrusions, so that the two pressing plates have a better effect of breaking up the flocculant. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of a battery wastewater treatment and drainage device in the present invention.

[0021] Figure 2 It is a cross-sectional structural schematic diagram of the mounting plate installed on the processing tank in the present invention.

[0022] Figure 3 It is a schematic diagram of the structure of the box body in the present invention.

[0023] Figure 4 It is a schematic cross-sectional structural diagram of the box body in the present invention.

[0024] Figure 5 It is a schematic diagram of the structure inside the hollow cavity of the box body in the present invention.

[0025] Figure 6 It is a schematic diagram of the structure of the positioning member in the present invention.

[0026] Figure 7 It is a structural schematic diagram of the opening and closing plate in the present invention.

[0027] The meaning of the symbols in the figure is:

[0028] 100, treatment tank; 110, mounting plate; 120, box body; 130, water supply pipe; 140, drainage pipe; 150, motor;

[0029] 200, rotating rod; 201, processing chamber; 210, stirring rod;

[0030] 301, cavity; 310, pressing plate; 311, guide plate; 320, fixing plate; 321, handle; 330, positioning box;

[0031] 400, screw rod; 401, cavity; 411, moving groove; 420, rack; 421, moving rod; 422, shift block; 430, round rod; 440, spring; 450, opening and closing plate;

[0032] 500, gear;

[0033] 600, positioning rod; 610, positioning plate. DETAILED DESCRIPTION

[0034] In order to further understand the content of the present invention, the present invention is described in detail in conjunction with the accompanying drawings and embodiments. It should be understood that the embodiments are only for explaining the present invention and are not intended to limit it.

[0035] The following is combined with Figure 1-Figure 7 This embodiment is described in further detail.

[0036] like Figure 1As shown, a battery sewage treatment and drainage device in this embodiment includes a treatment tank 100, a mounting plate 110 is provided at the upper end of the treatment tank 100, a stirring assembly for stirring the sewage in the treatment tank 100 is provided on the mounting plate 110, a box body 120 is also provided on the upper end surface of the mounting plate 110, a cavity 301 with openings at both ends and used for containing flocculant is opened in the box body 120, the lower end of the cavity 301 is connected to the treatment tank 100, relative pressing plates 310 are provided in the cavity 301, a cavity 401 is also provided in the box body 120, a driving assembly for driving the two pressing plates 310 to break the agglomerated flocculant is provided in the cavity 401, and an opening and closing assembly for opening and closing the opening at the lower end of the cavity 301 is also provided at the lower end of the box body 120.

[0037] In this embodiment, a treatment chamber 201 with an upward opening is provided in the treatment tank 100. When sewage is contained in the treatment chamber 201, a flocculant is placed in the chamber 301 and between two pressing plates 310, and the two pressing plates 310 are driven to move closer to or farther from each other by a driving component, so that the two pressing plates 310 can squeeze the flocculant in the chamber 301, so that the agglomerated flocculant is squeezed and crushed. When the flocculant is crushed, the lower end of the chamber 301 is released by the opening and closing component, so that the crushed flocculant can flow from the chamber 301 into the treatment chamber 201. At this time, the sewage and flocculant in the treatment chamber 201 are stirred by the stirring component, so that the sewage and the flocculant can be fully mixed, and then the flocculant can better flocculate and precipitate the sewage.

[0038] The driving assembly drives the two pressing plates 310 to break up the agglomerated flocculants, thereby preventing the agglomerated flocculants from being added into the treatment chamber 201 and mixed with the sewage. Compared with the existing battery sewage treatment and drainage device, the dissolution time of the agglomerated flocculants is shortened during actual use, and the mixing effect of the flocculants and the sewage is better, so that the flocculants have a better treatment effect on the sewage.

[0039] Wherein, a plurality of protrusions are installed on the opposite side walls of the two pressing plates 310. When the two pressing plates 310 squeeze the agglomerated flocculant, the agglomerated flocculant can be squeezed and crushed better through the protrusions, so that the two pressing plates 310 have a better crushing effect on the flocculant.

[0040] In actual use, a water supply pipe 130 connected to the processing chamber 201 is fixedly installed at the upper end of the processing tank 100, and sewage can be added to the processing chamber 201 through the water supply pipe 130 for treatment. A drainage pipe 140 connected to the processing chamber 201 is also fixedly installed on the lower end surface of the processing tank 100. A solenoid valve is installed in the drainage pipe 140. When the sewage in the processing chamber 201 is mixed with the flocculant, the solenoid valve is opened, and the mixed sewage is discharged to the sedimentation tank through the drainage pipe 140 for static sedimentation treatment.

[0041] During actual use, the box body 120 is fixedly mounted on the mounting plate 110, and the outer wall of the mounting plate 110 extends outward to form a mounting portion, which is threadedly mounted on the upper end surface of the processing tank 100 to achieve the installation of the mounting plate 110 and the box body 120 on the processing tank 100. When the mounting plate 110 is installed on the processing tank 100, the stirring assembly on the mounting plate 110 is located in the processing chamber 201.

[0042] like Figure 1-4 As shown, in this embodiment, the driving assembly includes a screw rod 400 which is relatively arranged in the cavity 401 and can rotate. One end of the screw rod 400 extends into the cavity 301 and the thread passes through the two pressure plates 310. The two screw rods 400 rotate synchronously to drive the two pressure plates 310 to move closer to or away from each other. A rotating part is also provided in the cavity 401 to drive the two screw rods 400 to rotate synchronously.

[0043] In this embodiment, by setting the screw rod 400 and the rotating part, the two ends of the screw rod 400 are rotatably installed on the opposite side walls of the cavity 301 through bearings to realize the rotational installation of the screw rod 400, wherein the screw rod 400 is provided with relative and reverse threads, and the threads are matched with the corresponding threads of the pressure plate 310, so that when the two screw rods 400 rotate synchronously, the two pressure plates 310 will approach or move away from each other along the screw rod 400, thereby realizing that the two pressure plates 310 can squeeze and crush the flocculant between the two pressure plates 310.

[0044] like Figure 1-5 As shown, in this embodiment, the screw rod 400 located in the cavity 401 is sleeved with a gear 500;

[0045] The rotating member includes a slidable rack 420 disposed between the two gears 500 , the side wall of the rack 420 is meshed with the corresponding gear 500 , and the movement of the rack 420 is used to drive the two gears 500 to rotate, thereby realizing the rotation of the two screw rods 400 .

[0046] In this embodiment, by setting the gear 500 and the rack 420, the gear 500 is fixedly mounted on the screw 400 located in the cavity 401. When the rack 420 is lifted and slid in the cavity 401, the rack 420 drives the two meshing gears 500 to rotate. When the gear 500 rotates, the corresponding screw 400 is driven to rotate, so that the screw 400 drives the two pressing plates 310 to squeeze and crush the flocculant.

[0047] A moving groove 411 is provided on the side wall of the box body 120 along the moving direction of the rack 420, a moving rod 421 with one end extending out of the moving groove 411 is fixedly installed on the rack 420, and a shifting block 422 for driving the rack 420 to move is fixedly installed on the moving rod 421. The shifting block 422 drives the moving rod 421 to move up and down along the moving groove 411, so that the rack 420 can be lifted and lowered in the cavity 401, and at the same time, the two gears 500 are driven to rotate;

[0048] When too much flocculant is placed between the two pressing plates 310, the two pressing plates 310 may squeeze the flocculant, which may cause the flocculant to overflow from the opening of the cavity 301. In order to prevent the flocculant from overflowing from the opening of the cavity 301 when the two pressing plates 310 squeeze the flocculant, a round rod 430 with one end passing through the rack 420 is fixedly installed in the cavity 401. The round rod 430 is sleeved with a spring 440 for pushing the rack 420 to move upward. The spring 440 is used to push the upper end face of the rack 420 to abut against the upper end face of the cavity 401. At this time, the rack 420 is in the initial position. When the upper end face of the rack 420 When the end faces are in contact with the upper end face of the cavity 401, the two pressing plates 310 are close to each other and there is a certain space between them. In actual use, the agglomerated flocculant is placed in this space. At this time, the shift block 422 can only drive the rack 420 to move downward, so that the screw rod 400 drives the two pressing plates 310 away from each other. Then, the shift block 422 drives the rack 420 to move upward to the initial position, so that the screw rod 400 drives the two pressing plates 310 to move closer to each other, and the agglomerated flocculant is broken. The above operation can prevent the flocculant from overflowing from the opening of the cavity 301 when the two pressing plates 310 break the flocculant.

[0049] It should be noted that, in the initial state of this embodiment, flocculant is added into the cavity 301 between the two pressing plates 310 . Preferably, the height of the flocculant is located below the screw rod 400 to avoid affecting the rotation of the screw rod 400 .

[0050] In actual use, a guide plate 311 is fixedly installed on the upper end surface of the pressing plate 310 and is movable and extends out of the cavity 401. The guide plate 311 is inclined. The inclined guide plate 311 is used to prevent the flocculant from being added into the cavity 301 between the pressing plate 310 and the side wall of the box body 120 when adding the flocculant, thereby affecting the actual use.

[0051] like Figure 1-7 As shown, in this embodiment, a slide groove with one end penetrating the box body 120 is provided on one side wall of the cavity 301;

[0052] The opening and closing assembly includes an opening and closing plate 450 which is arranged on the mounting plate 110 and can slide. One end of the opening and closing plate 450 slides into or out of the cavity 301 through a slide groove, so that the opening and closing plate 450 opens and closes the opening at the lower end of the cavity 301. A positioning member is also provided on the side wall of the box body 120, and the positioning member is used to position the opening and closing plate 450 that slides into the cavity 301.

[0053] In this embodiment, by setting the chute, the opening and closing plate 450 and the positioning member, the positioning member releases the positioning of the opening and closing plate 450, and the opening and closing plate 450 in the cavity 301 can slide out of the cavity 401 through the chute. At this time, the crushed flocculant in the cavity 301 can flow into the treatment chamber 201 and mix with the sewage.

[0054] Before the flocculant is added into the cavity 301, the opening and closing plate 450 needs to be inserted into the cavity 401 from the slide, and the lower end of the cavity 301 is closed, so that the flocculant added into the cavity 301 will not enter the processing chamber 201 without being crushed;

[0055] During actual use, when the opening and closing plate 450 closes the lower end of the cavity 301, it is necessary to position the opening and closing plate 450 through a positioning piece to prevent the opening and closing plate 450 from moving when the pressure plate 310 crushes the flocculant, causing the agglomerated flocculant to flow into the processing chamber 201 and affect the actual use effect.

[0056] like Figure 1-7 As shown, in this embodiment, a fixing plate 320 is provided on the other end of the opening and closing plate 450;

[0057] The positioning member includes a positioning box 330 arranged on the side wall of the box body 120, and a positioning rod 600 with one end extending out is installed in the positioning box 330 through a torsion spring. A positioning plate 610 is provided at the extended end of the positioning rod 600. The torsion spring is used to drive the positioning plate 610 on the positioning rod 600 to abut against the fixed plate 320, so as to realize the positioning of the positioning plate 610 on the opening and closing plate 450. In this embodiment, by setting the fixing plate 320, the positioning box 330, the positioning rod 600, the positioning plate 610 and the torsion spring, the fixing plate 320 is fixedly installed on the opening and closing plate 450, the positioning box 330 is fixedly installed on the box body 120, and the torsion spring is installed in the positioning box 330 using the existing installation method. When the opening and closing plate 450 closes the opening and closing of the lower end of the cavity 401, one side wall of the fixing plate 320 abuts against the side wall of the box body 120. At this time, the torsion spring drives the positioning plate 610 on the positioning rod 600 to abut against the other side wall of the fixing plate 320, thereby realizing the positioning of the opening and closing plate 450.

[0058] The positioning plate 610 is rotated to release the positioning plate 610 from contacting the fixed plate 320. At this time, the opening and closing plate 450 can be slid out of the slide groove through the fixed plate 320, releasing the closing of the lower end of the cavity 301 by the opening and closing plate 450.

[0059] In actual use, a handle 321 is fixedly installed on the other side of the fixed plate 320 , and the handle 321 is used to drive the opening and closing plate 450 to open and close the opening at the lower end of the cavity 401 .

[0060] like Figure 1-2 As shown, in this embodiment, the stirring assembly includes a rotatable rotating rod 200 disposed on the lower end surface of the mounting plate 110, and a plurality of stirring rods 210 are provided on the rotating rod 200 along its height direction. The rotation of the rotating rod 200 is used to drive the stirring rod 210 to stir the sewage in the treatment tank 100.

[0061] In this embodiment, by setting the rotating rod 200 and the stirring rod 210, the upper end of the rotating rod 200 is rotated on the mounting plate 110 through the bearing rotating rod 200, and the stirring rod 210 is fixedly mounted on the rotating rod 200. When the rotating rod 200 rotates, the stirring rod 210 rotates along the circumference of the rotating rod 200, so that the stirring rod 210 mixes and stirs the sewage and the flocculant in the treatment chamber 201;

[0062] In actual use, a motor 150 is installed on the upper end surface of the mounting plate 110 , and the output shaft of the motor 150 is connected to the rotating rod 200 , so that the rotating rod 200 can be driven to rotate by the motor 150 .

[0063] Working principle: Sewage is added into the treatment chamber 201 through the water supply pipe 130, and then the flocculant is added into the chamber 301 between the two pressing plates 310, and the shifting block 422 slides along the moving groove 411, so that the rack 420 drives the two gears 500 to rotate, and the gear 500 rotates to drive the screw 400 to rotate, so that the convex blocks on the two pressing plates 310 break the flocculant in the chamber 301. When the flocculant is broken, the positioning plate 61 is shifted. 0, release the abutment of the positioning plate 610 on the fixed plate 320, and then, the opening and closing plate 450 can be slid out of the cavity 301 through the handle 321. At this time, the crushed flocculant in the cavity 301 will flow into the processing chamber 201, and then, the rotating rod 200 is driven to rotate by the motor 150, so that the stirring rod 210 mixes the sewage and flocculant in the processing chamber 201. Finally, the solenoid valve is opened to discharge the mixed sewage through the drain pipe 140.

[0064] In conclusion, the above is only a preferred embodiment of the present invention, and all equivalent changes and modifications made according to the scope of the patent application of the present invention should fall within the scope of the patent of the present invention.

Claims

1. A battery wastewater treatment and drainage device, comprising a treatment tank (100), characterized in that: The upper end of the treatment tank (100) is provided with a mounting plate (110), and a stirring assembly for stirring the sewage in the treatment tank (100) is provided on the mounting plate (110). A box body (120) is also provided on the upper end surface of the mounting plate (110). A cavity (301) with openings at both ends and used for containing flocculants is provided in the box body (120). The lower end of the cavity (301) is connected to the treatment tank (100). A relative pressing plate (310) is provided in the cavity (301). A cavity (401) is provided in the box body (120). (401) is provided with a driving assembly for driving the two pressing plates (310) to break up the agglomerated flocculant, the driving assembly comprises a screw rod (400) relatively arranged in the cavity (401) and rotatable, one end of the screw rod (400) extends into the cavity (301) and the thread penetrates through the two pressing plates (310), the two screw rods (400) rotate synchronously to drive the two pressing plates (310) to move closer to or away from each other, and the lower end of the box body (120) is also provided with an opening and closing assembly for opening and closing the opening at the lower end of the cavity (301).

2. A battery wastewater treatment and drainage device according to claim 1, characterized in that: The driving assembly also includes a rotating member disposed in the cavity (401) and used for driving the two screw rods (400) to rotate synchronously.

3. A battery wastewater treatment and drainage device according to claim 2, characterized in that: The screw rods (400) in the cavity (401) are sleeved with gears (500); The rotating member comprises a slidable rack (420) disposed between the two gears (500); the side wall of the rack (420) is meshed with the corresponding gear (500); the rack (420) moves to drive the two gears (500) to rotate, thereby realizing the rotation of the two screw rods (400).

4. A battery wastewater treatment and drainage device according to claim 3, characterized in that: A moving groove (411) is provided on the side wall of the box body (120) along the moving direction of the rack (420); a moving rod (421) with one end extending out of the moving groove (411) is provided on the rack (420); and a shifting block (422) for driving the rack (420) to move is provided on the moving rod (421).

5. A battery wastewater treatment and drainage device according to claim 4, characterized in that: A round rod (430) having one end penetrating the rack (420) is disposed in the cavity (401), and a spring (440) for pushing the rack (420) upward is sleeved on the round rod (430).

6. A battery wastewater treatment and drainage device according to claim 1, characterized in that: A sliding groove with one end penetrating the box body (120) is provided on one side wall of the cavity (301); The opening and closing assembly comprises an opening and closing plate (450) which is slidably arranged on the mounting plate (110); one end of the opening and closing plate (450) passes through a slide groove and slides into or out of the cavity (301), so that the opening and closing plate (450) can open and close the opening at the lower end of the cavity (301); a positioning member is also provided on the side wall of the box body (120), and the positioning member is used to position the opening and closing plate (450) which slides into the cavity (301).

7. A battery wastewater treatment and drainage device according to claim 6, characterized in that: A fixing plate (320) is provided on the other end of the opening and closing plate (450); The positioning member comprises a positioning box (330) arranged on the side wall of the box body (120), a movable and extended positioning rod (600) is installed in the positioning box (330) through a torsion spring, and a positioning plate (610) is provided at the extended end of the positioning rod (600), and the torsion spring is used to drive the positioning plate (610) on the positioning rod (600) to abut against the fixed plate (320), so as to realize the positioning of the positioning plate (610) on the opening and closing plate (450).

8. A battery wastewater treatment and drainage device according to claim 1, characterized in that: The stirring assembly comprises a rotating rod (200) which is rotatably arranged on the lower end surface of the mounting plate (110), and a plurality of stirring rods (210) are provided on the rotating rod (200) along its height direction. The rotating rod (200) is rotated to drive the stirring rods (210) to stir the sewage in the treatment tank (100).