Sewage multi-stage treatment equipment

Abstract

The utility model relates to the field of sewage multi-stage treatment equipment, in particular to sewage multi-stage treatment equipment. Comprising a box body, a plurality of filter screens are arranged in the box body, a water inlet is formed in one side of the box body, a water outlet is formed in the side, away from the water inlet, of the box body, an adjusting structure is arranged on one side of the box body and comprises a sliding rail, and the sliding rail is fixedly connected with the box body; a plurality of sliding blocks are slidably connected to the inner wall of the sliding rail, a connecting groove is formed in one side of the sliding rail, a plurality of connecting rods are slidably connected to the inner wall of the connecting groove, the connecting rods are fixedly connected with the sliding blocks, nuts are in threaded connection with the arc surfaces of the connecting rods, and inserting rods are slidably connected to the inner walls of the sliding blocks. The side face of the inserting rod is sleeved with a spring. The multi-stage sewage treatment equipment provided by the utility model has the advantage that a plurality of filter screens with filter holes of different sizes can be conveniently and randomly mounted to treat sewage to different degrees.

Description

Technical Field

[0001] The utility model relates to the field of multi-stage sewage treatment equipment, in particular to multi-stage sewage treatment equipment. Background Art

[0002] Sewage treatment equipment is an industrial equipment that can effectively treat urban domestic sewage, industrial wastewater, etc., and prevent sewage and pollutants from flowing directly into waters. It is of great significance to improving the ecological environment, enhancing the quality of the city and promoting economic development.

[0003] Prior art, such as announcement number: CN206089273U, discloses a multi-stage filtering sewage treatment equipment, which includes a multi-stage filtering pool, a water inlet device arranged at the upper left of the multi-stage filtering pool, a stirring device arranged on the left side of the multi-stage filtering pool, a support frame arranged below the multi-stage filtering pool, and a water outlet pipe arranged on the right side of the multi-stage filtering pool; the multi-stage filtering pool includes a sewage mixing pool, a primary filtering pool, a secondary filtering pool and a tertiary filtering pool; a water inlet device passing through the sewage mixing pool is arranged above the sewage mixing pool, and a stirring device is arranged on the left side thereof; the utility model overcomes the shortcomings of the prior art, has a clever design and a reasonable structure, and the sewage in the sewage pool is stirred and then filtered layer by layer through the primary filtering pool, the secondary filtering pool and the tertiary filtering pool, so that the filtered water has a good purification effect.

[0004] The inventors discovered during daily use that when the multi-stage sewage treatment equipment is in use, because a fixed number of filter screens are installed inside the existing multi-stage sewage treatment equipment, although the filter screens arranged in sequence have filter holes from large to small to treat the sewage, it is inconvenient to replace the number of filter screens and replace filter screens with different filter holes, resulting in the problem that the sewage can only be treated to a certain degree, which leads to certain limitations.

[0005] Therefore, it is necessary to provide a new multi-stage sewage treatment equipment to solve the above technical problems. Utility Model Content

[0006] The utility model aims to solve the shortcomings in the prior art and proposes a multi-stage sewage treatment device.

[0007] In order to solve the above technical problems, the utility model provides a sewage multi-stage treatment equipment, comprising: a box body, a plurality of filter screens are arranged inside the box body, a water inlet is provided on one side of the box body, a water outlet is provided on the side of the box body away from the water inlet, an adjustment structure is provided on one side of the box body, and the adjustment structure comprises a slide rail, the slide rail is fixedly connected to the box body, a plurality of sliders are slidably connected to the inner wall of the slide rail, a connecting groove is provided on one side of the slide rail, a plurality of connecting rods are slidably connected to the inner wall of the connecting groove, the connecting rod and the slider are fixedly connected, a nut is threadedly connected to the circular arc surface of the connecting rod, a plug rod is slidably connected to the inner wall of the slider, a spring is sleeved on the side of the plug rod, two ends of the spring are respectively fixedly connected to the slider and the plug rod, a groove is provided on one side of the slider, a fixing groove is provided on the inner wall of the groove, a plurality of filter screens are fixedly connected to a connecting plate on one side, a connecting hole is provided on one side of the connecting plate, and the connecting hole and the fixing groove are both adapted to the plug rod.

[0008] The effect achieved by the above components is that a fixed number of filters are installed inside the existing multi-stage sewage treatment equipment. Although the filter holes of the filters arranged in sequence are from large to small to treat the sewage, it is inconvenient to change the number of filters and replace the filters with different filter holes, which results in only one degree of sewage treatment. By setting the adjustment structure, it is convenient to install a number of filters with different sizes of filter holes at will to treat the sewage to different degrees.

[0009] Preferably, the inner walls of a plurality of the sliding blocks are slidably connected to a same limiting rod, and the limiting rod is fixedly connected to the inner wall of the slide rail.

[0010] The effect achieved by the above components is that when the slider slides on the inner wall of the slide rail, the limit rod can prevent the slider from deviating when sliding on the inner wall of the slide rail.

[0011] Preferably, one end of the insertion rod is fixedly connected to a pull ring, and the cross-section of the pull ring is circular.

[0012] The effect achieved by the above components is that when the insertion rod needs to be moved, the insertion rod is driven to move by pulling the pull ring, which is convenient and labor-saving to operate.

[0013] Preferably, an anti-skid pad is fixedly connected to one side of the nut, and the anti-skid pad is a rubber pad.

[0014] The effect achieved by the above components is that when the slider moves into position and is fixed by rotating the nut on the arc surface of the connecting rod to squeeze the side of the slide rail, the anti-slip pad can increase the friction between one side of the nut and the side of the slide rail, making the nut squeezed and fixed more stably.

[0015] Preferably, the surface of the box body is provided with an auxiliary structure, and the auxiliary structure includes a slide groove, which is opened on the box body, and the inner wall of the slide groove is slidably connected with an auxiliary block, the inner wall of the box body is rotatably connected with a screw rod, the screw rod and the auxiliary block are threadedly connected, one end of the screw rod is fixedly connected with a turntable, one side of the auxiliary block is fixedly connected with a connecting plate, the inner wall of the connecting plate is slidably connected with a sliding rod, one end of the sliding rod is fixedly connected with a brush, the surface of the connecting plate is fixedly connected with an auxiliary plate, the inner wall of the auxiliary plate is threadedly connected with a screw, and the arc surface of the sliding rod is provided with a fixing hole, and the fixing hole and the screw are adapted.

[0016] The effect achieved by the above components is: after the filter is used for a long time, the filter holes on the filter are easily blocked by foreign matter, thereby affecting the use efficiency of the filter. By setting up the auxiliary structure, it is convenient to clean the foreign matter blocking the surface of the filter.

[0017] Preferably, an auxiliary rod is slidably connected to the inner wall of the connecting plate, and the auxiliary rod is fixedly connected to the brush.

[0018] The effect achieved by the above components is that when the brush is moved by moving the sliding rod, the auxiliary rod fixed on one side of the brush slides on the inner wall of the connecting plate, thereby preventing the brush from deflecting during the movement and making the brush move more stably.

[0019] Preferably, one end of the screw is fixedly connected to a guide block, and the guide block is conical.

[0020] The effect achieved by the above components is: when the brush is not in use, the brush is driven to move upward by moving the sliding rod upward. When the sliding rod is moved up to the right position, the screw rod on the inner wall of the auxiliary plate is rotated to pass through the fixing hole on the arc surface of the sliding rod for fixing. Because the guide block is conical, it is convenient for the screw rod to be inserted into the fixing hole quickly and accurately.

[0021] Compared with the related art, the multi-stage sewage treatment equipment provided by the utility model has the following beneficial effects:

[0022] The utility model provides a sewage multi-stage treatment device. A fixed number of filter screens are installed inside the existing sewage multi-stage treatment device. Although the filter holes of the filter screens arranged in sequence are from large to small to treat the sewage, it is inconvenient to replace the number of filter screens and replace filter screens with different filter holes, which results in that the sewage can only be treated to a certain degree. Therefore, when the sewage needs to be treated, the filter screens and the number of corresponding filter holes are determined according to the degree of sewage treatment that needs to be treated, and then a plurality of sliders on the inner wall of the slide rail are moved to corresponding positions. At the same time, the plurality of sliders slide on the arc surface of the limit rod. The limit rod can prevent the slider from deviating when sliding on the inner wall of the slide rail. The movement of the slider drives the connecting rod of the inner wall of the connecting groove to move. When the slider moves to the corresponding position, the nut on the arc surface of the connecting rod is rotated to squeeze the side of the slide rail for fixing. A non-slip pad is fixed on one side of the nut. The non-slip pad can increase The friction between one side of the nut and the side of the slide rail makes the nut extrusion and fixation more stable. When the slider is fixed, the prepared filter screens are placed in the box one by one, and then the pull ring is pulled to drive the plug rod to move up and out of the groove. The movement of the plug rod drives the spring to stretch, and then the connecting plate on one side of the filter screen is placed in the groove. When the connecting plate is in place, the pull ring is released, and the resilience of the spring drives the plug rod to automatically move back and slide through the connecting hole on the connecting plate and insert it into the fixed groove on the inner wall of the groove to limit and fix the filter screen. In this way, several filter screens can be installed and fixed in the box. Sewage enters from the water inlet and passes through the filter screens with different filter holes in turn for treatment, and is finally discharged from the water outlet. When it is necessary to treat the sewage to different degrees, it is convenient to replace the model and quantity of the filter screen. By setting the adjustment structure, the effect of conveniently installing several filter screens with different sizes of filter holes to treat the sewage to different degrees is achieved.

[0023] After the filter has been used for a long time, the filter holes on the filter are easily clogged by foreign matter, thus affecting the use efficiency of the filter. Therefore, when the surface of the filter is clogged with foreign matter, the turntable is driven to rotate the screw rod, and the rotation of the screw rod drives the auxiliary block on the inner wall of the slide groove to move, and the movement of the auxiliary block drives the movement of the connecting plate, and the movement of the connecting plate drives the movement of the brush. When the bristles on the brush move to the surface of the filter, the turntable is stopped, and then the screw on the inner wall of the auxiliary plate is disengaged from the fixing hole on the arc surface of the slide rod to release the fixation of the slide rod, and then the slide rod is moved up and down to drive the brush to move up and down, and the brush is fixed while moving. The auxiliary rod on one side of the brush slides on the inner wall of the connecting plate to prevent the brush from deflecting during movement, making the brush move more stably. The foreign matter blocked on the surface of the filter is cleaned by the up and down movement of the brush. When the surface of the filter is cleaned, the brush is driven to move upward by the upward sliding rod. When the brush is moved into place, it is fixed by rotating the screw on the inner wall of the auxiliary plate in the opposite direction through the fixing hole on the arc surface of the sliding rod. A guide block is fixed at one end of the screw. Because the guide block is conical, it is convenient for the screw to be inserted into the fixing hole quickly and accurately. By setting the auxiliary structure, the effect of facilitating the cleaning of foreign matter blocked on the surface of the filter is achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A schematic diagram of the structure of a multi-stage sewage treatment device provided by the utility model;

[0025] Figure 2 for Figure 1 A schematic diagram of the structure of the regulatory structure shown;

[0026] Figure 3 for Figure 2 The enlarged structural diagram of point A is shown;

[0027] Figure 4 for Figure 1 A schematic diagram of the structure of the auxiliary structure shown;

[0028] Figure 5 for Figure 4 The enlarged structural diagram of point B is shown;

[0029] Figure 6 for Figure 4 The enlarged structural diagram of point C is shown.

[0030] Numbers in the figure: 1. Box body; 2. Filter; 3. Adjustment structure; 301. Slide rail; 302. Slider; 303. Connecting groove; 304. Connecting rod; 305. Nut; 306. Insert rod; 307. Spring; 308. Groove; 309. Fixing groove; 310. Connecting plate; 311. Connecting hole; 312. Limit rod; 313. Pull ring; 314. Anti-skid pad; 4. Auxiliary structure; 401. Slide groove; 402. Auxiliary block; 403. Screw rod; 404. Turntable; 405. Connecting plate; 406. Slide rod; 407. Brush; 408. Auxiliary plate; 409. Screw rod; 410. Fixing hole; 411. Auxiliary rod; 412. Guide block; 5. Water inlet; 6. Water outlet. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0032] The specific implementation of the present utility model is described in detail below in conjunction with specific embodiments.

[0033] See also Figures 1 to 6 A multi-stage sewage treatment device provided by an embodiment of the utility model includes: a box body 1, a plurality of filter screens 2 are arranged inside the box body 1, a water inlet 5 is opened on one side of the box body 1, a water outlet 6 is opened on the side of the box body 1 away from the water inlet 5, an adjustment structure 3 is arranged on one side of the box body 1, and an auxiliary structure 4 is arranged on the surface of the box body 1.

[0034] In the embodiments of the present invention, please refer to Figure 2 and Figure 3The adjustment structure 3 includes a slide rail 301, which is fixedly connected to the box body 1. The inner wall of the slide rail 301 is slidably connected to a plurality of sliders 302. A connecting groove 303 is provided on one side of the slide rail 301. The inner wall of the connecting groove 303 is slidably connected to a plurality of connecting rods 304. The connecting rods 304 are fixedly connected to the slider 302. The arc surface of the connecting rod 304 is threadedly connected to a nut 305. The inner wall of the slider 302 is slidably connected to an insertion rod 306. A spring 307 is sleeved on the side of the insertion rod 306. The two ends of the spring 307 are respectively connected to the slider 302. The slider 302 is fixedly connected to the plug rod 306, a groove 308 is provided on one side of the slider 302, a fixing groove 309 is provided on the inner wall of the groove 308, a connecting plate 310 is fixedly connected to one side of a plurality of filter screens 2, a connecting hole 311 is provided on one side of the connecting plate 310, and the connecting hole 311 and the fixing groove 309 are both adapted to the plug rod 306. A fixed number of filter screens 2 are installed inside the existing multi-stage sewage treatment equipment. Although the filter holes of the filter screens 2 arranged in sequence are from large to small to treat the sewage, it is inconvenient to replace the number of filter screens 2 and replace different filter holes. The filter screen 2 can only process the sewage to a certain extent. By setting the adjustment structure 3, it is convenient to install a plurality of filter screens 2 with different filter holes to process the sewage to different degrees. The inner walls of the plurality of sliders 302 are slidably connected with the same limit rod 312. The limit rod 312 is fixedly connected to the inner wall of the slide rail 301. When the slider 302 slides on the inner wall of the slide rail 301, the limit rod 312 can prevent the slider 302 from deviating when sliding on the inner wall of the slide rail 301. One end of the insertion rod 306 is fixedly connected with a pull ring 313. The cross section of the pull ring 313 is circular. When the insertion rod 306 needs to be moved, the insertion rod 306 is driven to move by pulling the pull ring 313, which is convenient and labor-saving. One side of the nut 305 is fixedly connected with an anti-skid pad 314, which is a rubber pad. When the slider 302 is moved into place and the nut 305 on the arc surface of the connecting rod 304 is rotated to squeeze the side of the slide rail 301 for fixing, the anti-skid pad 314 can increase the friction between one side of the nut 305 and the side of the slide rail 301, so that the nut 305 is squeezed and fixed more stably.

[0035] In the embodiments of the present invention, please refer to Figure 4 , Figure 5 and Figure 6The auxiliary structure 4 includes a slide groove 401, which is opened on the box body 1, and the inner wall of the slide groove 401 is slidably connected with an auxiliary block 402, and the inner wall of the box body 1 is rotatably connected with a screw rod 403, the screw rod 403 and the auxiliary block 402 are threadedly connected, one end of the screw rod 403 is fixedly connected with a turntable 404, and one side of the auxiliary block 402 is fixedly connected with a connecting plate 405, and the inner wall of the connecting plate 405 is slidably connected with a slide rod 406, and one end of the slide rod 406 is fixedly connected with a brush 407, and the surface of the connecting plate 405 is fixedly connected with an auxiliary plate 408, and the inner wall of the auxiliary plate 408 is threadedly connected with a screw rod 409, and the arc surface of the slide rod 406 is provided with a fixing hole 410, and the fixing hole 410 and the screw rod 409 are adapted. After the filter screen 2 is used for a long time, the filter holes on the filter screen 2 are easily blocked by foreign matter, thereby affecting the use efficiency of the filter screen 2. By setting the auxiliary structure 4, the filter screen 2 can be easily blocked by foreign matter. In order to clean the foreign matter blocked on the surface of the filter screen 2, the inner wall of the connecting plate 405 is slidably connected with an auxiliary rod 411, and the auxiliary rod 411 and the brush 407 are fixedly connected. When the brush 407 is driven to move by moving the sliding rod 406, the auxiliary rod 411 fixed on one side of the brush 407 slides on the inner wall of the connecting plate 405, thereby preventing the brush 407 from deflecting during the movement, making the brush 407 move more stably. One end of the screw 409 is fixedly connected with a guide block 412, and the guide block 412 is tapered. When the brush 407 is not in use, the brush 407 is driven to move upward by moving the sliding rod 406. When the sliding rod 406 is moved up to the right position, the screw 409 on the inner wall of the auxiliary plate 408 is rotated to pass through the fixing hole 410 on the arc surface of the sliding rod 406 for fixing. Because the guide block 412 is tapered, it is convenient for the screw 409 to be quickly and accurately inserted into the fixing hole 410;

[0036] The working principle of a sewage multi-stage treatment device provided by the utility model is as follows: a fixed number of filter screens 2 are installed inside the existing sewage multi-stage treatment device. Although the filter holes of the filter screens 2 arranged in sequence are from large to small to treat the sewage, it is inconvenient to change the number of filter screens 2 and to replace the filter screens 2 with different filter holes, which results in only one degree of sewage treatment. Therefore, when sewage treatment is required, the filter screens 2 and the number of filter holes corresponding to the sewage treatment degree are determined according to the sewage treatment degree, and then a plurality of sliders 30 on the inner wall of the slide rail 301 are moved. 2 moves to the corresponding position, and at the same time, a plurality of sliders 302 slide on the arc surface of the limiting rod 312. The limiting rod 312 can prevent the slider 302 from deviating when sliding on the inner wall of the slide rail 301. The movement of the slider 302 drives the connecting rod 304 on the inner wall of the connecting groove 303 to move. When the slider 302 moves to the corresponding position, the nut 305 on the arc surface of the connecting rod 304 is rotated to squeeze the side of the slide rail 301 for fixing. An anti-skid pad 314 is fixed on one side of the nut 305. The anti-skid pad 314 can increase the nut The friction between one side of 305 and the side of the slide rail 301 makes the nut 305 squeezed and fixed more stably. When the slider 302 is fixed, the prepared filter 2 is placed in the box body 1 in turn, and then the insertion rod 306 is driven to move up and out of the groove 308 by pulling the pull ring 313. The movement of the insertion rod 306 drives the spring 307 to stretch, and then the connecting plate 310 on one side of the filter 2 is placed in the groove 308. When the connecting plate 310 is placed in place, the pull ring 313 is released, and the insertion rod 306 is automatically moved back by the resilience of the spring 307. The connection hole 311 on the sliding connecting plate 310 is inserted into the fixing groove 309 on the inner wall of the groove 308 to limit and fix the filter 2, so that several filter screens 2 can be installed and fixed in the box body 1. The sewage enters from the water inlet 5 and passes through the filter screens 2 with different filter holes in turn for treatment, and is finally discharged from the water outlet 6. When it is necessary to treat the sewage to different degrees, it is convenient to replace the model and quantity of the filter screen 2. By setting the adjustment structure 3, it is convenient to install several filter screens 2 with different sizes of filter holes to treat the sewage to different degrees.

[0037] After the filter 2 has been used for a long time, the filter holes on the filter 2 are easily clogged by foreign matter, thereby affecting the use efficiency of the filter 2. Therefore, when the surface of the filter 2 is clogged with foreign matter, the turntable 404 is rotated to drive the screw rod 403 to rotate, and the rotation of the screw rod 403 drives the auxiliary block 402 on the inner wall of the slide groove 401 to move, and the movement of the auxiliary block 402 drives the movement of the connecting plate 405, and the movement of the connecting plate 405 drives the movement of the brush 407. When the bristles on the brush 407 move to the surface of the filter 2, the turntable 404 is stopped, and then the screw rod 409 on the inner wall of the auxiliary plate 408 is disengaged from the fixing hole 410 on the arc surface of the slide rod 406 to release the fixation of the slide rod 406, and then the slide rod 406 is moved up and down to drive the brush 407 to move up and down. The auxiliary rod 411 fixed on one side of the brush 407 slides on the inner wall of the connecting plate 405 to prevent the brush 407 from deflecting during the movement, so that the brush 407 moves more stably, and the foreign matter blocked on the surface of the filter 2 is cleaned by the up and down movement of the brush 407. When the surface of the filter 2 is cleaned, the brush 407 is driven to move upward by the upward sliding rod 406. When the brush 407 moves into place, the screw 409 on the inner wall of the auxiliary plate 408 is fixed by reversely rotating it through the fixing hole 410 on the arc surface of the sliding rod 406. A guide block 412 is fixed at one end of the screw 409. Because the guide block 412 is conical, it is convenient for the screw 409 to be quickly and accurately inserted into the fixing hole 410. By setting the auxiliary structure 4, the effect of facilitating the cleaning of foreign matter blocked on the surface of the filter 2 is achieved.

[0038] The circuits and controls involved in the present invention are all prior art and will not be described in detail here.

[0039] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A multi-stage sewage treatment equipment, characterized in that: include: A box body (1), wherein a plurality of filters (2) are arranged inside the box body (1), a water inlet (5) is provided on one side of the box body (1), a water outlet (6) is provided on a side of the box body (1) away from the water inlet (5), an adjustment structure (3) is provided on one side of the box body (1), the adjustment structure (3) comprises a slide rail (301), the slide rail (301) and the box body (1) are fixedly connected, a plurality of sliders (302) are slidably connected to the inner wall of the slide rail (301), a connection groove (303) is provided on one side of the slide rail (301), a plurality of connecting rods (304) are slidably connected to the inner wall of the connecting groove (303), and the connecting rods (304) and the sliders (302) are fixedly connected, The arc surface of the connecting rod (304) is threadedly connected with a nut (305); the inner wall of the slider (302) is slidably connected with an insertion rod (306); a spring (307) is sleeved on the side of the insertion rod (306); two ends of the spring (307) are respectively fixedly connected to the slider (302) and the insertion rod (306); a groove (308) is provided on one side of the slider (302); a fixing groove (309) is provided on the inner wall of the groove (308); a connecting plate (310) is fixedly connected to one side of a plurality of the filter screens (2); a connecting hole (311) is provided on one side of the connecting plate (310); the connecting hole (311) and the fixing groove (309) are both adapted to the insertion rod (306).

2. A multi-stage sewage treatment equipment according to claim 1, characterized in that: The inner walls of a plurality of the sliding blocks (302) are slidably connected to a same limiting rod (312), and the limiting rod (312) is fixedly connected to the inner wall of the slide rail (301).

3. A multi-stage sewage treatment equipment according to claim 1, characterized in that: One end of the insertion rod (306) is fixedly connected to a pull ring (313), and the cross section of the pull ring (313) is circular.

4. A multi-stage sewage treatment equipment according to claim 1, characterized in that: An anti-skid pad (314) is fixedly connected to one side of the nut (305), and the anti-skid pad (314) is a rubber pad.

5. The multi-stage sewage treatment equipment according to claim 1, characterized in that: The surface of the box body (1) is provided with an auxiliary structure (4), the auxiliary structure (4) comprising a slide groove (401), the slide groove (401) is opened on the box body (1), the inner wall of the slide groove (401) is slidably connected to an auxiliary block (402), the inner wall of the box body (1) is rotatably connected to a screw rod (403), the screw rod (403) and the auxiliary block (402) are threadedly connected, one end of the screw rod (403) is fixedly connected to a rotating disk (404), and the auxiliary block (402) is rotatably connected to the inner wall of the box body (1). A connecting plate (405) is fixedly connected to one side, a sliding rod (406) is slidably connected to the inner wall of the connecting plate (405), a brush (407) is fixedly connected to one end of the sliding rod (406), an auxiliary plate (408) is fixedly connected to the surface of the connecting plate (405), a screw (409) is threadedly connected to the inner wall of the auxiliary plate (408), and a fixing hole (410) is opened on the arc surface of the sliding rod (406), and the fixing hole (410) and the screw (409) are adapted to each other.

6. A multi-stage sewage treatment equipment according to claim 5, characterized in that: The inner wall of the connecting plate (405) is slidably connected to an auxiliary rod (411), and the auxiliary rod (411) and the brush (407) are fixedly connected.

7. The multi-stage sewage treatment equipment according to claim 5, characterized in that: One end of the screw rod (409) is fixedly connected to a guide block (412), and the guide block (412) is conical.

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