Wastewater treatment device

Abstract

The utility model relates to the technical field of wastewater treatment, and discloses a wastewater treatment device which comprises a treatment box internally provided with a treatment cavity, a shell arranged on the lower end face of the treatment box, a cavity arranged in the shell, a rotating rod arranged in the cavity, a mounting rod arranged in the treatment cavity and opposite stirring frames arranged in the treatment cavity, a rotating assembly is arranged in the cavity; a dismounting assembly is arranged at one end part of the mounting rod; a cover plate is arranged on the upper end face of the treatment cavity, a water inlet pipe and a medicament box which are communicated with the treatment cavity are arranged on the cover plate, and a mounting assembly is further arranged on the cover plate. By means of the structure, the two rotating rods are driven by the rotating assembly to rotate oppositely, the two rotating rods drive the two stirring frames to rotate oppositely in the treatment cavity, that is, the two stirring frames can conduct stirring in multiple directions, and therefore the mixing effect of a flocculating agent and waste water is good.

Description

TECHNICAL FIELD

[0001] The utility model relates to wastewater treatment technical field, specifically, relate to a wastewater treatment device. BACKGROUND

[0002] Catalyst processing wastewater mainly comes from raw material cleaning, pretreatment, synthesis reaction etc. link, contains suspended solids, organic matter, inorganic salt and so on various pollutants, if these wastewaters are not properly treated, will cause serious influence to the environment.

[0003] For example, the patent number CN211496967U discloses a wastewater treatment device, although the wastewater treatment device relieves the technical problem that the gas generated in the process of neutralizing acidic wastewater has irritating smell, diffuses into the air and will affect the surrounding working environment in the prior art, realizes the technical effect of avoiding the gas with irritating smell from affecting the surrounding environment, but the wastewater treatment device in actual use, through the rotation shaft drive rotating rod rotation, realizes the mixing and stirring of reactant and wastewater, in this process, the stirring direction of rotating rod is single, and the mixing of reactant and wastewater is not enough, that is, the mixing effect of mixture and wastewater is poor, so it needs to be improved. SUMMARY

[0004] The utility model aims at providing a wastewater treatment device to solve the problems in the above background.

[0005] To achieve the above object, the utility model provides the following technical scheme:

[0006] A wastewater treatment device, comprising a treatment box with a treatment cavity, a housing is arranged on the lower end face of the treatment box, a cavity is arranged in the housing, a rotating rod is arranged in the cavity, the rotating rod is opposite and one end extends into the treatment cavity, an installation rod and an opposite stirring frame are arranged in the treatment cavity, the installation rod is used for mounting the two stirring frames on the corresponding rotating rods, a rotating assembly is arranged in the cavity, and the rotating assembly is used for driving the two rotating rods to rotate in opposite directions.

[0007] A dismounting assembly is arranged at one end of the installation rod, and the dismounting assembly is used for dismounting the installation rod in the treatment cavity.

[0008] A cover plate is arranged on the upper end face of the treatment cavity, a water inlet pipe and a reagent box are arranged on the cover plate, and a mounting assembly is further arranged on the cover plate, and the mounting assembly is used for mounting the cover plate on the installation rod.

[0009] Preferably, a first gear and a first sprocket are respectively arranged on the two rotating rods in the cavity.

[0010] The rotating assembly comprises a vertical rod arranged in the cavity and rotatable, a second gear sleeved on the vertical rod and engaged with the first gear, and a second sprocket sleeved on the vertical rod, wherein a chain is sleeved between the second sprocket and the first sprocket, a motor is arranged on the lower end surface of the shell, and an output shaft of the motor is connected to one of the two rotating rods, so that the motor drives the two rotating rods to rotate in opposite directions.

[0011] Preferably, the opposite side walls of the treatment cavity are provided with insertion holes, the one end of the mounting rod is provided with a mounting groove, and the other end of the mounting rod is provided with an insertion block inserted into the corresponding insertion hole.

[0012] The dismounting assembly comprises a sleeve rod sleeved on the one end of the mounting rod, the one end of the sleeve rod is provided with a protruding block, and the mounting groove is provided with a spring for driving the protruding block on the sleeve rod to be inserted into the corresponding insertion hole, so as to realize the mounting of the mounting rod in the treatment cavity.

[0013] Preferably, the sleeve rod is provided with a limiting slot, one end of the limiting slot is provided with a communication slot communicating with the limiting slot, and the side wall of the mounting rod is provided with a limiting block inserted into the limiting slot.

[0014] Preferably, the cover plate is provided with a box body, the box body is provided with a cavity, and the mounting rod is provided with opposite fixing plates with one end inserted into the cavity.

[0015] The mounting assembly comprises a threaded rod arranged in the cavity and rotatable, opposite insertion plates threadedly sleeved on the threaded rod, and insertion rods arranged on the insertion plates, wherein the threaded rod is rotated to drive the insertion rods on the insertion plates to be inserted into the corresponding fixing plates, so as to realize the mounting of the cover plate on the mounting rod, and a driving member is arranged in the cavity and used for driving the threaded rod to rotate.

[0016] Preferably, the threaded rod is provided with a third gear.

[0017] The driving member comprises a circular rod arranged in the cavity and rotatable, and a fourth gear sleeved on the circular rod and engaged with the third gear, wherein the circular rod is rotated to drive the third gear on the threaded rod to rotate, so as to realize the rotation of the threaded rod.

[0018] Preferably, one end of the circular rod is arranged outside the box body, and the extending end of the circular rod is provided with a knob used for driving the circular rod to rotate.

[0019] Compared with the prior art, the utility model has the beneficial effects that:

[0020] 1. The utility model discloses a rotating assembly for driving two rotating rods to rotate in opposite directions, so that the two rotating rods drive two stirring frames to rotate in opposite directions in the treatment cavity, that is, the two stirring frames can stir in multiple directions, and the mixing effect of the flocculating agent and the wastewater is better.

[0021] The utility model discloses, when installing the pole is installed in the processing cavity, the cover plate can be installed on the installing pole through the installing component, namely the cover plate is fixed on the upper end surface of the processing box, thereby avoiding the cover plate from moving on the processing box when the wastewater is added into the processing cavity through the water inlet pipe on the cover plate, and affecting the wastewater from adding into the processing cavity through the water inlet pipe to carry out processing. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is a structure schematic view of wastewater treatment device in the utility model.

[0023] Figure 2 It is a sectional structure schematic view of processing box in the utility model.

[0024] Figure 3 It is a structure schematic view in the shell.

[0025] Figure 4 It is a structure schematic view of stirring frame in the utility model.

[0026] Figure 5 It is a structure schematic view of installing pole in the utility model.

[0027] Figure 6 It is an explosion structure schematic view of sleeve pole on the installing pole in the utility model.

[0028] Figure 7 It is an explosion structure schematic view of box body in the utility model.

[0029] The meaning of each reference numeral in the drawing is as follows:

[0030] 100, processing box;101, drain pipe;110, shell;111, support leg;120, cover plate;121, water inlet pipe;122, medicament box;130, box body;131, knob;

[0031] 201, processing cavity;202, cavity;210, rotating rod;211, first chain wheel;220, installing pole;221, fixed plate;230, vertical rod;231, second chain wheel;232, second gear;240, first gear;250, chain;260, motor;270, stirring shaft;271, stirring rod;

[0032] 301, square groove;

[0033] 400, square block;410, convex rod;

[0034] 500, plug block;510, sleeve pole;511, convex block;512, limiting slot;513, communication slot;520, limiting block;530, mounting seat;

[0035] 601, installing slot;610, spring;

[0036] 701, cavity; 710, threaded rod; 711, third gear; 720, insert plate; 721, insert rod; 730, round rod; 731, fourth gear; 740, threaded seat. Detailed Implementation

[0037] To further understand the content of this utility model, a detailed description of this utility model will be provided in conjunction with the accompanying drawings and embodiments. It should be understood that the embodiments are merely illustrative of this utility model and are not intended to limit it.

[0038] The following is in conjunction with the appendix Figures 1-7 This embodiment will be described in further detail.

[0039] like Figure 1 As shown, a wastewater treatment device in this embodiment includes a treatment box 100 with a treatment chamber 201 inside. A housing 110 is provided on the lower end surface of the treatment box 100. A cavity 202 is provided inside the housing 110. Rotating rods 210 with opposite ends extending into the treatment chamber 201 are provided inside the cavity 202. An installation rod 220 and opposite stirring racks are provided inside the treatment chamber 201. The installation rod 220 is used to install two stirring racks on the corresponding rotating rods 210. A rotating assembly is provided inside the cavity 202. The rotating assembly is used to drive the two rotating rods 210 to rotate in opposite directions.

[0040] A disassembly assembly is provided at one end of the mounting rod 220, which is used to disassemble and assemble the mounting rod 220 within the processing cavity 201.

[0041] The upper surface of the treatment chamber 201 is provided with a cover plate 120. The cover plate 120 is provided with a water inlet pipe 121 that connects to the treatment chamber 201 and a medicine box 122. The cover plate 120 is also provided with an installation component for installing the cover plate 120 onto the installation rod 220.

[0042] In this embodiment, flocculant is first added to reagent box 122. Then, wastewater is added to treatment chamber 201 through water inlet pipe 121, and flocculant in reagent box 122 is added to wastewater in treatment tank 100 to achieve treatment of wastewater by flocculant. In order to improve the treatment effect of flocculant on wastewater, flocculant in wastewater needs to be mixed and stirred. Two rotating rods 210 are driven to rotate in opposite directions by rotating component, so that the two rotating rods 210 drive two stirring frames to rotate in opposite directions in treatment chamber 201. That is, the two stirring frames can stir in multiple directions. Compared with the existing ones, this wastewater treatment device can achieve better mixing effect of flocculant and wastewater in actual use.

[0043] The upper end face of the rotating rod 210 is provided with a square slot 301, the mounting rod 220 is fixedly provided with opposite mounting seats 530, the mounting seat 530 is provided with a downward opening mounting hole, the stirring frame comprises a stirring shaft 270, a plurality of stirring rods 271 are fixedly installed on the side wall of the stirring shaft 270, a square block 400 is fixedly installed on the lower end face of the stirring shaft 270, the square block 400 and the square slot 301 are square, a protruding rod 410 is fixedly installed on the upper end face of the stirring shaft 270, the square block 400 on the stirring rod 271 is inserted into the corresponding square slot 301, the stirring shaft 270 is pre-installed on the corresponding rotating rod 210, at this time, the mounting rod 220 is installed in the treatment cavity 201 through the dismounting assembly, the protruding rod 410 on the stirring shaft 270 is inserted into the corresponding mounting hole, the upper end of the stirring shaft 270 is limited, and the stirring shaft 270 is installed on the rotating rod 210;

[0044] When the mounting rod 220 is dismounted from the treatment cavity 201 through the dismounting assembly, the two stirring frames can be taken out from the treatment cavity 201 by lifting the two stirring frames, so that the treatment cavity 201 and the stirring frame are convenient for the staff to clean;

[0045] When the mounting rod 220 is installed in the treatment cavity 201, the cover plate 120 can be installed on the mounting rod 220 through the mounting assembly, that is, the cover plate 120 is fixed on the upper end face of the treatment box 100, so that when the wastewater is added into the treatment cavity 201 through the water inlet pipe 121 on the cover plate 120, the position of the cover plate 120 on the treatment box 100 is not moved, and the wastewater is not added into the treatment cavity 201 for treatment through the water inlet pipe 121;

[0046] When the mounting assembly dismounts the cover plate 120 from the mounting rod 220, the cover plate 120 can be taken off from the treatment box 100, at this time, the mounting rod 220 can be taken out from the treatment cavity 201 through the dismounting assembly;

[0047] The water inlet pipe 121 is fixedly installed on the cover plate 120, the medicine box 122 is fixedly installed on the cover plate 120, a medicine pipe communicating with the treatment cavity 201 is fixedly installed on the lower end face of the medicine box 122, a first electromagnetic valve is installed in the medicine pipe, the flocculating agent in the medicine box 122 can be added into the wastewater in the treatment cavity 201 through the opening and closing of the first electromagnetic valve, a drain pipe 101 communicating with the treatment cavity 201 is fixedly installed at the lower end of the treatment box 100, a second electromagnetic valve is installed in the drain pipe 101, the wastewater mixed with the flocculating agent in the treatment cavity 201 can be discharged out of the treatment box 100 through the drain pipe 101 through the opening and closing of the second electromagnetic valve, and subsequent flocculation and precipitation are carried out;

[0048] In actual use, the shell 110 is fixedly installed on the lower end face of the processing box 100, the upper and lower ends of the rotating rods 210 are rotatably installed on the bottom wall of the cavity 202 and the bottom wall of the processing cavity 201 through bearings, the lower end face of the shell 110 and at the four corners are fixedly installed with supporting legs 111, and the supporting legs 111 can support the processing box 100 through the shell 110.

[0049] As shown in Figures 1-3 In this embodiment, the first gear 240 and the first sprocket 211 are respectively sleeved on the two rotating rods 210 in the cavity 202.

[0050] The rotating assembly comprises a vertical rod 230 arranged in the cavity 202 and rotatable, the vertical rod 230 is sleeved with the second gear 232 engaged with the first gear 240, and the vertical rod 230 is also sleeved with the second sprocket 231, the chain 250 is sleeved between the second sprocket 231 and the first sprocket 211, the lower end face of the shell 110 is provided with a motor 260, and the output shaft of the motor 260 is connected to one of the two rotating rods 210, so that the motor 260 drives the two rotating rods 210 to rotate in opposite directions.

[0051] In this embodiment, by arranging the first gear 240, the second sprocket 231, the vertical rod 230, the second gear 232, the second sprocket 231, the chain 250 and the motor 260, the first gear 240 is fixedly installed on the corresponding rotating rod 210, the first sprocket 211 is fixedly installed on the corresponding rotating rod 210, the two ends of the vertical rod 230 are rotatably installed on the bottom wall of the cavity 202 and the lower end face of the processing box 100, the second sprocket 231 and the second gear 232 are fixedly installed on the vertical rod 230, the motor 260 is fixedly installed on the lower end face of the shell 110, and the output shaft of the motor 260 is fixedly connected to one of the two rotating rods 210, so that when the motor 260 drives the rotating rod 210 to rotate, the rotating rod 210 can drive the first sprocket 211 to rotate, the first sprocket 211 can drive the second sprocket 231 to rotate through the chain 250, that is, the vertical rod 230 rotates, the vertical rod 230 rotates to drive the first gear 240 to rotate through the second gear 232, that is, the first gear 240 drives the other rotating rod 210 to rotate, so that the two rotating rods 210 rotate in opposite directions.

[0052] As shown in Figures 1-6 In this embodiment, the processing cavity 201 is provided with a bushing on the opposite side walls, the mounting rod 220 is provided with a mounting groove 601 at one end, and the other end is provided with a plug 500 inserted into the corresponding bushing.

[0053] The dismounting and assembling component comprises a sleeve rod 510 sleeved on one end of the mounting rod 220, a protrusion 511 is arranged on one end of the sleeve rod 510, and a spring 610 is arranged in the mounting groove 601 and used to drive the protrusion 511 on the sleeve rod 510 to be inserted into the corresponding insertion hole, so as to realize the mounting of the mounting rod 220 in the processing cavity 201.

[0054] In the embodiment, the insertion hole, the mounting groove 601, the insertion block 500, the sleeve rod 510, the protrusion 511 and the spring 610 are arranged, the insertion block 500 is fixedly mounted on the mounting rod 220, the protrusion 511 is fixedly mounted on the sleeve rod 510, when the mounting rod 220 and the sleeve rod 510 are located in the processing cavity 201 and the insertion block 500 is inserted into the corresponding insertion hole, the sleeve rod 510 is moved by the spring 610, the protrusion 511 on the sleeve rod 510 is inserted into the corresponding insertion hole, and the mounting in the processing cavity 201 is realized.

[0055] When the worker holds the sleeve rod 510 and drives the sleeve rod 510 to move towards the mounting rod 220, the protrusion 511 on the sleeve rod 510 slides out of the corresponding insertion hole, at this time, the mounting of the mounting rod 220 in the processing cavity 201 is released.

[0056] The sleeve rod 510 is provided with a limiting groove 512, the limiting groove 512 is arranged along the length direction of the sleeve rod 510, one end of the limiting groove 512 is provided with a communication groove 513 in communication with the limiting groove 512, the side wall of the mounting rod 220 is fixedly provided with a limiting block 520 which is clamped into the limiting groove 512, the sleeve rod 510 is limited by the limiting block 520 and the limiting groove 512, so that the sleeve rod 510 can only move horizontally, when the sleeve rod 510 moves to the appropriate position of the mounting rod 220, the communication groove 513 on the sleeve rod 510 corresponds to the limiting block 520, at this time, the sleeve rod 510 is rotated, so that the limiting block 520 is located in the communication groove 513, so that the sleeve rod 510 can always keep the state after moving, so that the worker can dismount and assemble the mounting rod 220 in the processing cavity 201.

[0057] In actual use, the limiting block 520 is slid out of the communication groove 513 and located in the limiting groove 512 by rotating the sleeve rod 510, so that the state of the sleeve rod 510 after moving is released.

[0058] As shown in Figures 1-7 In the embodiment, the cover plate 120 is provided with a box body 130, the box body 130 is provided with a cavity 701, and the mounting rod 220 is provided with a fixed plate 221 which is opposite and has one end extending into the cavity 701.

[0059] The mounting assembly comprises a threaded rod 710 arranged in the cavity 701 and rotatable, and opposite insertion plates 720 threadedly sleeved on the threaded rod 710, and insertion rods 721 are arranged on the insertion plates 720, the threaded rod 710 is rotated to drive the insertion rods 721 on the insertion plates 720 to be inserted into the corresponding fixed plates 221, so that the cover plate 120 is mounted on the mounting rods 220, and a driving member is arranged in the cavity 701 and used to drive the threaded rod 710 to rotate.

[0060] In the embodiment, the box body 130 is fixedly mounted on the cover plate 120, the fixed plates 221 are fixedly mounted on the mounting rods 220, the insertion rods 721 are fixedly mounted on the insertion plates 720, the side walls of the insertion plates 720 are slidably attached to the side walls of the cavity 701, and the insertion plates 720 are square-shaped, when the cover plate 120 is placed on the processing box 100, the two fixed plates 221 can penetrate through the cover plate 120 and extend into the cavity 701, at this time, the threaded rod 710 is driven to rotate by the driving member, so that the threaded rod 710 can drive the two insertion plates 720 to move relative to each other, the movement of the insertion plates 720 drives the movement of the insertion rods 721, and when one end of the insertion rod 721 is inserted into the corresponding fixed plate 221, the installation of the cover plate 120 on the mounting rod 220 is realized.

[0061] When the driving member drives the threaded rod 710 to rotate, the threaded rod 710 drives the two insertion plates 720 to move close to each other, the insertion rods 721 on the two insertion plates 720 slide out of the corresponding fixed plates 221, so that the installation of the cover plate 120 on the mounting rod 220 is released, at this time, the cover plate 120 is lifted up, and the cover plate 120 can be removed from the processing box 100.

[0062] The threaded rod 710 is fixedly mounted with a plug ring at both ends, the plug ring intercepts the insertion plate 720, so that the insertion plate 720 is prevented from being separated from the threaded rod 710, and the actual use is affected.

[0063] In actual use, opposite threaded seats 740 are fixedly mounted in the cavity 701 and on the cover plate 120, and both ends of the threaded rod 710 are rotatably mounted on the corresponding threaded seats 740 through bearings.

[0064] As shown in the drawings, Figures 1-7 In the embodiment, a third gear 711 is arranged on the threaded rod 710.

[0065] The driving member comprises a circular rod 730 arranged in the cavity 701 and rotatable, and a fourth gear 731 meshing with the third gear 711 is sleeved on the circular rod 730, the circular rod 730 is rotated to drive the third gear 711 on the threaded rod 710 to rotate, so that the threaded rod 710 is rotated.

[0066] In the embodiment, the third gear 711, the round rod 730 and the fourth gear 731 are arranged, the third gear 711 is fixedly installed on the threaded rod 710, the two ends of the round rod 730 are rotatably installed on the side wall of the cavity 701 through bearings, the fourth gear 731 is fixedly installed on the round rod 730, when the round rod 730 drives the fourth gear 731 to rotate, the fourth gear 731 drives the third gear 711 to rotate, that is, the third gear 711 drives the threaded rod 710 to rotate.

[0067] In actual use, one end of the round rod 730 extends out of the box body 130 and is fixedly installed with a knob 131 for driving the round rod 730 to rotate.

[0068] In actual use, first, the wastewater is added into the treatment cavity 201 through the water inlet pipe 121, then, the first electromagnetic valve is opened, the flocculating agent in the agent box 122 is added into the wastewater in the treatment cavity 201, at this time, one of the two rotating rods 210 is driven to rotate by the motor 260, the rotation of the one rotating rod 210 can drive the first sprocket 211 to rotate, the first sprocket 211 can drive the vertical rod 230 to rotate through the cooperation of the chain 250 and the second sprocket 231, the vertical rod 230 rotates to drive the first gear 240 to rotate through the second gear 232, so that the other rotating rod 210 rotates, at this time, the two rotating rods 210 rotate in opposite directions, that is, the two rotating rods 210 drive the two stirring frames to rotate in opposite directions, so that the flocculating agent and the wastewater in the treatment cavity 201 can be fully mixed, after the mixing is completed, the second electromagnetic valve is opened, the mixed wastewater in the treatment cavity 201 can be discharged through the drain pipe 101, finally, the discharged wastewater can be flocculated and precipitated.

[0069] In summary, the above only describes the preferred embodiments of the present application, any changes and modifications made within the scope of the present application should be included in the scope of the present application.

Claims

1. A wastewater treatment device, comprising a treatment box (100) with a treatment cavity (201) arranged therein, characterized in that: The lower end face of the processing box (100) is provided with a shell (110), the shell (110) is provided with a cavity (202) in the inside, the cavity (202) is provided with two rotating rods (210) which are opposite and one end of each of which extends into a processing cavity (201), the processing cavity (201) is provided with a mounting rod (220) and opposite stirring frames, the mounting rod (220) is used for mounting the two stirring frames on the corresponding rotating rods (210), the cavity (202) is provided with a rotating assembly, and the rotating assembly is used for driving the two rotating rods (210) to rotate in opposite directions. One end of the mounting rod (220) is provided with a dismounting assembly, and the dismounting assembly is used for dismounting the mounting rod (220) in the processing cavity (201). The upper end face of the processing cavity (201) is provided with a cover plate (120), the cover plate (120) is provided with a water inlet pipe (121) and a medicine box (122) which communicate with the processing cavity (201), and the cover plate (120) is further provided with a mounting assembly, and the mounting assembly is used for mounting the cover plate (120) on the mounting rod (220).

2. A wastewater treatment device according to claim 1, characterised in that: The two rotating rods (210) in the cavity (202) are respectively provided with a first gear (240) and a first sprocket (211). The rotating assembly comprises a vertical rod (230) which is arranged in the cavity (202) and can rotate, the vertical rod (230) is provided with a second gear (232) which is engaged with the first gear (240), and the vertical rod (230) is further provided with a second sprocket (231), the second sprocket (231) and the first sprocket (211) are provided with a chain (250) in the inside, and the lower end face of the shell (110) is provided with a motor (260), the output shaft of the motor (260) is connected to one of the two rotating rods (210), so that the motor (260) drives the two rotating rods (210) to rotate in opposite directions.

3. A wastewater treatment device according to claim 1, wherein: The opposite side walls of the processing cavity (201) are provided with insertion holes, one end of the mounting rod (220) is provided with a mounting groove (601), and the other end of the mounting rod (220) is provided with an insertion block (500) which is inserted into the corresponding insertion hole. The dismounting assembly comprises a sleeve rod (510) which is arranged at one end of the mounting rod (220), one end of the sleeve rod (510) is provided with a protrusion (511), and the mounting groove (601) is provided with a spring (610), the spring (610) is used for driving the protrusion (511) on the sleeve rod (510) to be inserted into the corresponding insertion hole, so that the mounting rod (220) is mounted in the processing cavity (201).

4. A wastewater treatment apparatus as claimed in claim 3, wherein: The sleeve rod (510) is provided with a limiting groove (512), one end of the limiting groove (512) is provided with a communication groove (513) which communicates with the limiting groove (512), and the side wall of the mounting rod (220) is provided with a limiting block (520) which is inserted into the limiting groove (512).

5. A wastewater treatment apparatus as claimed in claim 4, wherein: The cover plate (120) is provided with a box body (130), the box body (130) is provided with a cavity (701) in the inside, and the mounting rod (220) is provided with a fixing plate (221) which is opposite and one end of which extends into the cavity (701). The mounting assembly comprises a threaded rod (710) arranged in the cavity (701) and rotatable, opposite plug plates (720) threadedly sleeved on the threaded rod (710), and plug rods (721) arranged on the plug plates (720), the threaded rod (710) is rotated to drive the plug rods (721) on the plug plates (720) to be inserted into the corresponding fixed plates (221), so that the cover plate (120) is mounted on the mounting rod (220), and a driving member is arranged in the cavity (701) and used to drive the threaded rod (710) to rotate.

6. A wastewater treatment device according to claim 5, characterised in that: The threaded rod (710) is provided with a third gear (711); The driving member comprises a circular rod (730) arranged in the cavity (701) and rotatable, and a fourth gear (731) engaged with the third gear (711) is sleeved on the circular rod (730), the circular rod (730) is rotated to drive the third gear (711) on the threaded rod (710) to rotate, so that the threaded rod (710) rotates.

7. A wastewater treatment apparatus as claimed in claim 6, wherein: One end of the circular rod (730) extends out of the box body (130) and is provided with a knob (131) used to drive the circular rod (730) to rotate.

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