A multi-stage device for treating underground sewage

Abstract

The application discloses a kind of underground sewage multistage processing device, including processing box, the inside fixed mounting of the processing box is equipped with partition, the partition is used to divide processing box into main processing chamber, flow guide chamber and two backwashing chambers, and the application relates to sewage treatment technical field.The underground sewage multistage processing device, by making underground sewage after multistage processing of three groups of filtering components, part is excluded by liquid flange pipe, part enters backwashing chamber, the filtering component in backwashing chamber is washed, and the liquid after washing is introduced into main processing chamber again by backflow component, reduces the concentration of impurities in main processing chamber, provides conditions for efficient filtration of underground sewage, uses reciprocating drive component to make filtering component in main processing chamber and two backwashing chambers work alternately, realizes the alternate washing of filtering component, further improves the effective filtration work length of filtering component, provides support for efficient treatment of underground sewage.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of sewage treatment, in particular to a multi-stage underground sewage treatment device. BACKGROUND

[0002] In the sewage treatment process, the existing treatment process usually includes multiple steps, such as grid filtration, coagulation sedimentation, biological treatment, etc. The grid filtration is used to remove larger suspended solids, and the coagulation sedimentation is used to make the suspended solids aggregate and settle by adding chemical agents. The biological treatment stage utilizes microorganisms to decompose organic matter.

[0003] For underground sewage, it contains a large amount of sedimentable impurities, mainly including inorganic particulate matters such as silt and clay, organic particulate matters such as plant residues, and part of microorganisms. These impurities can be naturally settled by gravity or settled after forming flocculation with the help of coagulants. The existing technology generally adopts a treatment process of filtering suspended solids first, and then settling and depth filtration. This hierarchical treatment strategy can remove impurities of different particle sizes and properties step by step, ensuring that the effluent water quality meets the standard.

[0004] After filtering the suspended solids, for the sedimentation process, the waiting time for natural sedimentation is too long, which is not conducive to efficient treatment of underground sewage. When using a filter screen to filter impurities, the filter screen is prone to clogging, which requires frequent cleaning or replacement of the filter screen by the staff. In addition, during the use of the filter screen, as the filter screen clogs, the impurity content on the water inlet side of the filter screen rapidly increases, which not only affects the efficiency of sewage treatment, but also causes the filtration effect of the filter screen to rapidly decrease, which is not conducive to the sustained and efficient treatment of underground sewage. Therefore, a multi-stage underground sewage treatment device is provided, which uses a main treatment chamber to cooperate with multiple filter assemblies for multi-stage treatment of impurities, and directs part of the treated water into two backwashing chambers for alternating reverse flushing of the filter assemblies. This reduces the degree of clogging of the filter assemblies, and the backwashing water is again introduced into the main treatment chamber to reduce the impurity concentration on the liquid inlet side of the filter assemblies, thereby providing effective support for the persistent and efficient filtration of the filter assemblies. SUMMARY

[0005] In view of the deficiencies of the prior art, the present application provides a multi-stage underground sewage treatment device, which solves the problem of filter screen clogging when using a filter screen for multi-stage sewage treatment, and the problem of rapid increase of impurity content on the water inlet side of the filter screen during the use of the filter screen, which not only affects the efficiency of multi-stage sewage treatment, but also causes the filtration effect of the filter screen to rapidly decrease.

[0006] In order to achieve the above object, the underground sewage multi-stage treatment device is realized by the following technical scheme: a underground sewage multi-stage treatment device, comprising a treatment box, a partition frame is fixedly installed in the treatment box, the partition frame is used for separating the treatment box into a main treatment chamber, a flow guide chamber and two backwashing chambers, the flow guide chamber is used for connecting the main treatment chamber and the two backwashing chambers, a liquid inlet flange pipe is communicated with one side of the main treatment chamber, a liquid outlet flange pipe is communicated with one side of the flow guide chamber, two groups of backflow assemblies are arranged on the top of the treatment box, the backflow assemblies are used for connecting the backwashing chambers and the main treatment chamber, at least three groups of filter assemblies are arranged in the main treatment chamber and one of the backwashing chambers, and a reciprocal driving assembly matched with the three groups of filter assemblies is fixedly installed on the front of the treatment box.

[0007] An impurity cleaning assembly matched with the main treatment chamber is further arranged on the bottom of the treatment box.

[0008] In order to ensure the effective reduction of the impurity concentration on the water inlet side of the filter screen assembly, the backflow assembly comprises a high-picking cylinder and a reagent box, one side of the high-picking cylinder is communicated with a flow guide pipe, and a one-way valve is arranged on the surface of the flow guide pipe.

[0009] The high-picking cylinder and the reagent box are fixedly installed on the top of the treatment box, two groups of high-picking cylinders are respectively communicated with one of the backwashing chambers, two groups of flow guide pipes are communicated with the reagent box, the reagent box is communicated with the main treatment chamber, and the one-way valve is used for controlling the one-way flow of the liquid in the backwashing chamber to the main treatment chamber.

[0010] In order to realize multi-stage filtration of impurities, the filter assembly comprises a main body frame, two groups of filter plates are fixedly installed in the main body frame, a through groove matched with the main body frame is formed in the surface of the partition frame,

[0011] The mesh sizes of the filter plates in the three groups of filter assemblies are sequentially arranged from large to small along the liquid flow direction.

[0012] While ensuring the filtration effect of impurities, the filter plate is provided with convenient backwashing conditions, the surface of the filter plate is arranged with a plurality of square holes in a rectangular array, a triangular plate is slidably installed in the square hole, a square plate is penetratingly arranged between a plurality of longitudinally arranged triangular plates, a square groove matched with the square plate is formed in the inner surface of the square hole, a movable groove is formed in the top and the bottom of the main body frame, the both ends of the square plate penetratingly extend into the two movable grooves, and a guide cylinder is fixedly installed at the both ends of the square plate.

[0013] Three groups of isosceles trapezoidal plates are fixedly installed on the front and back sides of the top and the bottom of the inner cavity of the treatment box, and the isosceles trapezoidal plates are matched with the guide cylinder.

[0014] In order to realize the alternate work of the two filter plates, the application further provides that the reciprocating driving assembly comprises an electric telescopic rod, a mounting frame is fixedly installed at the telescopic end of the electric telescopic rod, and three groups of push rods are fixedly installed at the back of the mounting frame.

[0015] The electric telescopic rod is fixedly installed at the front of the treatment box, and one end of each of the three groups of push rods penetrates through the treatment box and is fixedly connected with the front of the three groups of main body frames.

[0016] In order to realize the effective collection and cleaning of impurities in the backwashing chamber, the application further provides that a storage pool is fixedly installed at the left side of the front and rear of the bottom of the treatment box, and the two storage pools are respectively communicated with the two backwashing chambers, and a first sewage valve head is communicated with one side of the storage pool.

[0017] In order to realize the rapid cleaning of the sediment impurities in the main treatment chamber, the application further provides that the impurity cleaning assembly comprises a spiral conveying cylinder, a first driving motor is fixedly installed at one end of the spiral conveying cylinder, a first rotating shaft is fixedly installed at the output end of the first driving motor and penetrates through the spiral conveying cylinder through a shaft coupling, a first spiral conveying piece is fixedly installed on the outer periphery of the first rotating shaft and is used in cooperation with the spiral conveying cylinder, and a temporary storage box is communicated with the other end of the spiral conveying cylinder.

[0018] One end of the first rotating shaft penetrates through the temporary storage box and the expansion cylinder in sequence and is rotatably connected with the inner surface of the expansion cylinder through a bearing, a cylinder is communicated with the top of the temporary storage box, a valve-equipped discharge pipe is communicated with the top of one side of the cylinder, and the horizontal height of the connection position of the cylinder and the valve-equipped discharge pipe is much higher than the highest point of the pick-up cylinder.

[0019] The application further provides that three groups of sinking pipes are communicated with the bottom of the treatment box, the three groups of sinking pipes are all communicated with the main treatment chamber, and the three groups of sinking pipes are respectively arranged at the liquid inlet sides of the three groups of filtering assemblies.

[0020] The bottom ends of the three groups of sinking pipes are all communicated with the spiral conveying cylinder.

[0021] In order to improve the cleaning efficiency of impurities, the application further provides that a second driving motor is fixedly installed at the top of the cylinder, a second rotating shaft is fixedly installed at the output end of the second driving motor and penetrates through the cylinder through a shaft coupling, and a second spiral conveying piece is fixedly installed on the outer periphery of the second rotating shaft.

[0022] A second sewage valve head is further communicated with the back of the temporary storage box.

[0023] The application is further provided with a flow regulating valve which can be completely closed on the surface of the liquid outlet flange pipe.

[0024] The application provides an underground sewage multi-stage treatment device.

[0025] (1) The underground sewage is partially discharged by the liquid outlet flange pipe and partially enters the backwashing chamber after multi-stage treatment, the filter assembly in the backwashing chamber is washed, the washed liquid is introduced into the main treatment chamber again through the backflow assembly, the concentration of impurities in the main treatment chamber is reduced, the efficient filtration treatment of underground sewage is provided, the filter assembly can work alternately in the main treatment chamber and the two backwashing chambers under the setting of the reciprocating driving assembly, the alternating washing of the filter assembly is realized, the effective filtration working time of the filter assembly is further improved, and the efficient treatment of underground sewage is supported.

[0026] (2) The square hole, the triangular plate, the square plate and the square groove are arranged, the triangular plate can slide in the square hole, the impurities are filtered by the cooperation of the square hole and the triangular plate, the triangular plate is reset when the filter plate enters the backwashing chamber under the cooperation of the guide cylinder and the isosceles trapezoidal plate, the blocked impurities in the square hole are extruded, and the cleaning of the blocked impurities in the square hole of the backwashing chamber is facilitated.

[0027] (3) The cooperation of the spiral conveying cylinder, the temporary storage box, the cylinder and the valve discharge pipe avoids sewage overflow, the filtered impurities in the main treatment chamber enter the spiral conveying cylinder through the sinking material pipe, the impurities are conveyed to the temporary storage box by the cooperation of the first driving motor, the first rotating shaft and the first spiral conveying piece, the impurities are discharged through the valve discharge pipe as the impurities accumulate, and the cooperation of the second driving motor, the second rotating shaft and the second spiral conveying piece accelerates the discharge speed of the impurities, and reliable support is provided for efficient cleaning of the impurities. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 It is an external structure schematic diagram under the front side view of the application;

[0029] Figure 2 It is an external structure schematic diagram under the rear side view of the application;

[0030] Figure 3 It is a connection schematic diagram of the treatment box and the filter assembly structure of the application;

[0031] Figure 4 It is an internal structure schematic diagram of the treatment box of the application;

[0032] Figure 5The connection diagram of the main frame and the reciprocating driving assembly structure of the present application;

[0033] Figure 6 The structure diagram of the filter assembly of the present application;

[0034] Figure 7 The connection diagram of the filter plate, square hole, square plate, square groove, guide cylinder and triangular plate structure of the present application;

[0035] Figure 8 The connection diagram of the square plate, guide cylinder and triangular plate structure of the present application;

[0036] Figure 9 The top view of the connection of the filter plate, square hole, square plate and triangular plate structure of the present application;

[0037] Figure 10 The connection diagram of the treatment box and the backflow assembly structure of the present application;

[0038] Figure 11 The structure diagram of the impurity cleaning assembly of the present application;

[0039] Figure 12 The structure diagram of the main frame, filter plate and movable groove of the present application.

[0040] In the figure:

[0041] 1, treatment box; 101, partition frame; 102, main treatment chamber; 103, flow guide chamber; 104, backwashing chamber; 105, liquid inlet flange pipe; 106, liquid outlet flange pipe; 107, impurity storage pool; 108, first sewage valve head; 109, sinking material pipe; 1010, flow regulating valve;

[0042] 2, backflow assembly; 201, high-picking cylinder; 202, flow guide pipe; 203, one-way valve; 204, medicament box;

[0043] 3, filter assembly; 301, main frame; 302, filter plate; 303, through groove; 304, square hole; 305, square plate; 306, square groove; 307, movable groove; 308, guide cylinder; 309, isosceles trapezoidal plate; 3010, triangular plate;

[0044] 4, reciprocating driving assembly; 401, electric telescopic rod; 402, assembly frame; 403, push rod;

[0045] 5, impurity cleaning assembly; 501, spiral conveying cylinder; 502, first driving motor; 503, first rotating shaft; 504, first spiral conveying piece; 505, temporary storage box; 506, expansion cylinder; 507, cylinder; 508, valve-equipped discharge pipe; 509, second driving motor; 5010, second rotating shaft; 5011, second spiral conveying piece; 5012, second cleaning valve head. DETAILED DESCRIPTION

[0046] The technical solutions in the embodiments of the present application will be clearly and completely described in connection with the drawings in the embodiments of the present application.

[0047] Please refer to Figures 1-12 The technical solutions provided by the embodiments of the present application are as follows.

[0048] Embodiment one: a multi-stage underground sewage treatment device, comprising a treatment box 1, a partition frame 101 is fixedly installed inside the treatment box 1, the partition frame 101 is used for separating the treatment box 1 into a main treatment chamber 102, a flow guide chamber 103 and two backwashing chambers 104, the flow guide chamber 103 is used for connecting the main treatment chamber 102 and the two backwashing chambers 104, and the inside of the main treatment chamber 102 and one backwashing chamber 104 is jointly provided with at least three groups of filter assemblies 3, a liquid inlet flange pipe 105 is connected to one side of the main treatment chamber 102, and a liquid outlet flange pipe 106 is connected to one side of the flow guide chamber 103, underground sewage that needs to be filtered and settled is pumped into the liquid inlet flange pipe 105, after being filtered by the three groups of filter assemblies 3, part of the liquid is discharged from the liquid outlet flange pipe 106, and part of the liquid enters the backwashing chamber 104.

[0049] As a preferred solution, in order to reduce the concentration of impurities in the main treatment chamber 102, two groups of backflow assemblies 2 are arranged at the top of the treatment box 1, the backflow assemblies 2 are used for connecting the backwashing chamber 104 and the main treatment chamber 102, specifically, the backflow assembly 2 comprises a high-pitched cylinder 201 and a reagent box 204, one side of the high-pitched cylinder 201 is connected with a flow guide pipe 202, the high-pitched cylinder 201 and the reagent box 204 are fixedly installed at the top of the treatment box 1, and the two groups of high-pitched cylinders 201 are respectively connected with one backwashing chamber 104, the two groups of flow guide pipes 202 are connected with the reagent box 204, the reagent box 204 is connected with the main treatment chamber 102, a one-way valve 203 is arranged on the surface of the flow guide pipe 202, the one-way valve 203 is used for controlling the one-way flow of the liquid in the backwashing chamber 104 to the main treatment chamber 102, and the top of the reagent box 204 is further connected with a reagent adding head with a sealing structure, the reagent adding head can be used for adding reagents to the reagent box 204, and further, the reagent adding head can be designed as a flange pipe with a control valve, which is connected with an external pressurized reagent supply device, and the pressurized reagent supply mode can be used for continuously adding reagents during the sewage treatment process.

[0050] As a preferred, in order to achieve multi-stage filtering in the main processing chamber 102, the inside of the main processing chamber 102 and one backwashing chamber 104 are jointly provided with at least three sets of filtering assemblies 3, specifically, the filtering assembly 3 comprises a main frame 301, two sets of filter plates 302 are fixedly installed in the inside of the main frame 301, the main frame 301 is slidingly installed between the top and the bottom of the inner cavity of the processing box 1, and is limited by the partition frame 101, specifically, the surface of the partition frame 101 is provided with a through groove 303 matched with the main frame 301, the mesh sizes of the filter plates 302 in the three sets of filtering assemblies 3 are sequentially arranged from large to small along the liquid flow direction, in order to ensure the sealing effect of the connection between the main frame 301 and the partition frame 101, as shown in the accompanying drawings, grooves are arranged on both sides of the main frame 301, and sealing rings are arranged in the grooves. Figure 12

[0051] Further, in order to use the two filter plates 302 alternately, so that one filter plate 302 always filters impurities in the main processing chamber 102, the front surface of the processing box 1 is also fixedly installed with a reciprocating driving assembly 4 matched with the three sets of filtering assemblies 3, specifically, the reciprocating driving assembly 4 comprises an electric telescopic rod 401, the electric telescopic rod 401 is electrically connected with an external power supply and is controlled by a control switch, the electric telescopic rod 401 is fixedly installed on the front surface of the processing box 1, a mounting frame 402 is fixedly installed at the telescopic end of the electric telescopic rod 401, three sets of push rods 403 are fixedly installed on the back of the mounting frame 402, one end of each of the three sets of push rods 403 penetrates through the processing box 1 and is fixedly connected with the front surface of the three sets of main frames 301 respectively, in use, by controlling the telescopic of the electric telescopic rod 401, the main frame 301 can be driven to drive the two filter plates 302 to be used alternately.

[0052] The bottom of the processing box 1 is also provided with an impurity cleaning assembly 5 matched with the main processing chamber 102.

[0053] Embodiment two, this embodiment is an improvement of embodiment one, in order to facilitate the quality of reverse flushing of the filter plate 302, a plurality of square holes 304 are arranged on the surface of the filter plate 302 in a rectangular array, a triangular plate 3010 is slidingly installed in the inside of the square hole 304, a square plate 305 is jointly arranged through the plurality of triangular plates 3010 arranged in the longitudinal row, square grooves 306 matched with the square plate 305 are arranged on the inner surface of the square hole 304, movable grooves 307 are arranged on the top and the bottom of the main frame 301, the two ends of the square plate 305 penetrate through the main frame 301 and extend into the two movable grooves 307 respectively, guide cylinders 308 are fixedly installed at the two ends of the square plate 305, three sets of isosceles trapezoidal plates 309 are fixedly installed on the front and back of the top and the bottom of the inner cavity of the processing box 1, and the isosceles trapezoidal plates 309 are matched with the guide cylinders 308. ​

[0054] In use, for the filter plate 302 located inside the main treatment chamber 102, under the impact of sewage, the sewage passes through the filter plate 302 through the square hole 304, in the process, the triangular plate 3010 is pushed to slide to the right side, at this time, part of the impurities falls in the square hole 304, in the process of alternating use of the filter plate 302, with the extension and retraction of the electric telescopic rod 401, the main frame 301 drives the filter plate 302 to advance or retreat, in the process, the guide cylinder 308 is limited and guided by the inclined surface of the isosceles trapezoidal plate 309, the guide cylinder 308 drives the square plate 305 to reset the triangular plate 3010, pushes out part of the impurities blocked in the square hole 304, so that it falls into the main treatment chamber 102, until the filter plate 302 enters into a backwashing chamber 104;

[0055] For the filter plate 302 in the backwashing chamber 104, the water flow direction inside is opposite to that in the main treatment chamber 102, in this way, under the flow of water, the impurities in the square hole 304 are pushed out to the backwashing chamber 104, and the triangular plate 3010 is pushed to slide to the left side, in this way, when the filter plate 302 is driven by the electric telescopic rod 401 to move to the main treatment chamber 102 again, the triangular plate 3010 retreats to the square hole 304 under the limitation of the partition frame 101, in the process, part of the impurities adhered to the triangular plate 3010 can also be scraped off.

[0056] In order to realize the convenient cleaning of the settled impurities in the main treatment chamber 102, a kind of underground sewage multi-stage treatment device is provided, including the impurity cleaning assembly 5 used in cooperation with the main treatment chamber 102 in the bottom of the treatment box 1, the impurity cleaning assembly 5 includes the spiral conveying cylinder 501, one end of the spiral conveying cylinder 501 is fixedly installed with the first driving motor 502, the output end of the first driving motor 502 penetrates the spiral conveying cylinder 501, and is fixedly installed with the first rotating shaft 503 by coupling, the first rotating shaft 503 is externally provided with and fixedly installed with the first spiral conveying piece 504, the bottom of the treatment box 1 is communicated with three groups of sinking material pipes 109, the three groups of sinking material pipes 109 are communicated with the main treatment chamber 102, and the three groups of sinking material pipes 109 are respectively arranged at the liquid inlet side of the three groups of filtering assemblies 3, the bottom end of the three groups of sinking material pipes 109 is communicated with the spiral conveying cylinder 501, in order to guarantee the sealing effect, the sealing plate is arranged in the inside of the spiral conveying cylinder 501, the sealing guarantee is provided for the connection place of the first driving motor 502 and the spiral conveying cylinder 501, and the first spiral conveying piece 504 is used in cooperation with the spiral conveying cylinder 501, the other end of the spiral conveying cylinder 501 is communicated with the temporary storage box 505, one side of the temporary storage box 505 is communicated with the expansion cylinder 506, one end of the first rotating shaft 503 penetrates the temporary storage box 505 and the expansion cylinder 506 in sequence, and is rotatably connected with the inner surface of the expansion cylinder 506 by bearing, the top of the temporary storage box 505 is communicated with the cylinder 507, and the top of one side of the cylinder 507 is communicated with the valve discharge pipe 508, the back of the temporary storage box 505 is also communicated with the second cleaning valve head 5012, wherein the horizontal height of the connection place of the cylinder 507 and the valve discharge pipe 508 is much higher than the highest point of the high-pitched cylinder 201.

[0057] Further explanation, in order to avoid that the impurities cannot be conveyed to the valve discharge pipe 508, the top of the cylinder 507 is fixedly installed with the second driving motor 509, the output end of the second driving motor 509 penetrates the cylinder 507, and is fixedly installed with the second rotating shaft 5010 by coupling, the outer periphery of the second rotating shaft 5010 is externally provided with and fixedly installed with the second spiral conveying piece 5011.

[0058] When using, the impurities and sewage in the main treatment chamber 102 fall into the spiral conveying cylinder 501 through the sinking material pipe 109, with the continuous starting of the first driving motor 502, the impurities are continuously conveyed into the temporary storage box 505, with the accumulation of the impurities, the impurities overflow into the cylinder 507, under the rotating drive of the second driving motor 509, the impurities are conveyed into the valve discharge pipe 508, and the impurities are discharged after opening the valve.

[0059] And in order to realize the collection of impurities inside the backwashing chamber 104, the left side of the bottom of the treatment box 1 is fixedly provided with a storage pool 107, and the two storage pools 107 are respectively communicated with the two backwashing chambers 104, and one side of the storage pool 107 is communicated with a first cleaning valve head 108.

[0060] Further, in order to avoid the blockage of the sinking pipe 109, the flow regulating valve 1010 which can be completely closed is arranged on the surface of the liquid outlet flange pipe 106, and by closing the flow regulating valve 1010, the clean water is continuously injected into the treatment box 1, so that the sinking pipe 109 is conducted.

[0061] In summary, the present application can not only reduce the impurity concentration on the filtering side to improve the filtering efficiency, but also ensure the long-term and effective work of the filtering assembly 3 through the reverse flushing of the filtering assembly 3.

[0062] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A multi-stage device for the treatment of underground sewage, comprising a treatment tank (1), characterized in that: The inside of the processing box (1) is fixedly provided with a partition frame (101), which is used for dividing the processing box (1) into a main processing chamber (102), a flow guide chamber (103) and two backwashing chambers (104), the flow guide chamber (103) is used for communicating the main processing chamber (102) and the two backwashing chambers (104), one side of the main processing chamber (102) is communicated with a liquid inlet flange pipe (105), one side of the flow guide chamber (103) is communicated with a liquid outlet flange pipe (106), the top of the processing box (1) is provided with two groups of backflow assemblies (2), which are used for communicating the backwashing chambers (104) and the main processing chamber (102), the inside of the main processing chamber (102) and one backwashing chamber (104) is jointly provided with at least three groups of filter assemblies (3), and the front of the processing box (1) is also fixedly provided with a reciprocating driving assembly (4) matched with the three groups of filter assemblies (3); The bottom of the processing box (1) is also provided with a impurity cleaning assembly (5) matched with the main processing chamber (102); The filter assembly (3) comprises a main body frame (301), the inside of the main body frame (301) is fixedly provided with two groups of filter plates (302), the surface of the partition frame (101) is provided with a through groove (303) matched with the main body frame (301), The mesh sizes of the filter plates (302) in the three groups of filter assemblies (3) are sequentially arranged from large to small along the liquid flow direction; A plurality of square holes (304) are arranged in a rectangular array on the surface of the filter plate (302), a triangular plate (3010) is slidably arranged in the square hole (304), a square plate (305) is jointly arranged through a plurality of triangular plates (3010) arranged in a vertical column, a square groove (306) matched with the square plate (305) is formed in the inner surface of the square hole (304), and the top and bottom of the main body frame (301) are provided with a movable groove (307), the square plate (305) penetrates through the main body frame (301) at both ends and extends into the movable groove (307) at both ends, respectively, and the square plate (305) is further fixedly provided with a guide cylinder (308) at both ends; Three groups of isosceles trapezoidal plates (309) are fixedly arranged on the front and back sides of the top and bottom of the processing box (1), and the isosceles trapezoidal plates (309) are matched with the guide cylinders (308).

2. The multi-stage subsurface sewage treatment device of claim 1, wherein: The backflow assembly (2) comprises a high-pitched cylinder (201) and a medicament box (204), one side of the high-pitched cylinder (201) is communicated with a flow guide pipe (202), and the surface of the flow guide pipe (202) is provided with a one-way valve (203). The high cylinder (201) and the agent box (204) are fixedly installed on the top of the treatment box (1), and two groups of high cylinders (201) are communicated with one backwashing chamber (104) respectively, two groups of the flow guide pipes (202) are communicated with the agent box (204), the agent box (204) is communicated with the main treatment chamber (102), and the one-way valve (203) is used for controlling the one-way flow of liquid in the backwashing chamber (104) to the main treatment chamber (102).

3. The multi-stage subsurface sewage treatment device of claim 1, wherein: The reciprocating driving assembly (4) comprises an electric telescopic rod (401), and the telescopic end of the electric telescopic rod (401) is fixedly installed with an assembling frame (402). The electric telescopic rod (401) is fixedly installed on the front face of the treatment box (1), and one end of the three groups of push rods (403) penetrates the treatment box (1) and is fixedly connected with the front face of the three groups of main frames (301) respectively.

4. The multi-stage subsurface sewage treatment device of claim 1, wherein: The treatment box (1) is fixedly installed with a storage pool (107) on the left side of the front and rear sides of the bottom, and the two storage pools (107) are communicated with the two backwashing chambers (104) respectively, and one side of the storage pool (107) is communicated with a first sewage valve head (108).

5. The multi-stage subsurface sewage treatment device of claim 1, wherein: The impurity cleaning assembly (5) comprises a spiral conveying cylinder (501), one end of the spiral conveying cylinder (501) is fixedly installed with a first driving motor (502), the output end of the first driving motor (502) penetrates the spiral conveying cylinder (501) and is fixedly installed with a first rotating shaft (503) through a shaft coupling, the outer periphery of the first rotating shaft (503) is sleeved and fixedly installed with a first spiral conveying piece (504), and the first spiral conveying piece (504) is used in cooperation with the spiral conveying cylinder (501). The other end of the spiral conveying cylinder (501) is communicated with a temporary storage box (505), one side of the temporary storage box (505) is communicated with an expansion cylinder (506), one end of the first rotating shaft (503) penetrates the temporary storage box (505) and the expansion cylinder (506) in sequence and is rotatably connected with the inner surface of the expansion cylinder (506) through a bearing, the top of the temporary storage box (505) is communicated with a cylinder (507), and the top of one side of the cylinder (507) is communicated with a valve discharge pipe (508).

6. The underground sewage multi-stage treatment device according to claim 5, characterized in that: The bottom of the treatment box (1) is communicated with three groups of sinking pipes (109), the three groups of sinking pipes (109) are communicated with the main treatment chamber (102), and the three groups of sinking pipes (109) are arranged on the liquid inlet sides of the three groups of filtering assemblies (3) respectively. The bottom ends of the three groups of sinking pipes (109) are communicated with the spiral conveying cylinder (501).

7. The underground sewage multi-stage treatment device according to claim 5, characterized in that: The top of the cylinder (507) is fixedly installed with a second driving motor (509), the output end of the second driving motor (509) penetrates the cylinder (507) and is fixedly installed with a second rotating shaft (5010) through a shaft coupling, and the outer periphery of the second rotating shaft (5010) is sleeved and fixedly installed with a second spiral conveying piece (5011). The back of the temporary storage box (505) is also communicated with a second sewage valve head (5012).

8. The multi-stage subsurface sewage treatment device of claim 1, wherein: The surface of the liquid outlet flange pipe (106) is provided with a flow regulating valve (1010) that can be completely closed.

Images