Wastewater filtering device

Abstract

The utility model relates to a wastewater filtering device which comprises a box body, a first filtering part and a second filtering part, a filtering cavity is formed in the box body and can be communicated with a drainage pipeline; the first filtering part and the second filtering part are detachably arranged in the filtering cavity; wastewater can sequentially flow through the first filtering part and the second filtering part, and the mesh number of the first filtering holes in the first filtering part is smaller than that of the second filtering holes in the second filtering part; a filter material chamber is formed in the first filter part and / or the second filter part; a filter material for adsorbing impurities in the wastewater is accommodated in the filter material chamber. The wastewater filtering device has the beneficial effects that wastewater can sequentially flow through the first filtering part and the second filtering part, the first filtering part can filter impurities with relatively large pore diameters, and the second filtering part can filter impurities with relatively small pore diameters, so that the filtering effect of the wastewater is improved. And after the filtering device is used for a long time, impurities on the first filtering holes of the first filtering part and the second filtering holes of the second filtering part can be detached and cleaned.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment, in particular to a waste water filtering device. Background Art

[0002] Drainage pipes for collecting surface water are evenly arranged underground in cities. Since surface water is mixed with solid impurities such as garbage, the drainage pipes are likely to be blocked after long-term use. Therefore, filtering devices are correspondingly arranged in the current drainage pipes to filter solid impurities. However, after long-term use of the filtering device, the filter holes are also likely to be blocked, affecting the filtering performance and thus the normal operation of the drainage pipes. Summary of the Utility Model

[0003] (I) Technical Problems to be Solved

[0004] In view of the above-mentioned disadvantages and deficiencies of the prior art, the utility model provides a waste water filtering device, which solves the technical problem that the filter holes of the existing filtering device are likely to be blocked after long-term use.

[0005] (II) Technical Solutions

[0006] In order to achieve the above object, the main technical solutions adopted by the utility model include:

[0007] An embodiment of the utility model provides a waste water filtering device, including a box body, a first filtering part and a second filtering part;

[0008] A filtering cavity is arranged inside the box body, and the filtering cavity can communicate with a drainage pipe;

[0009] The first filtering part and the second filtering part are both detachably arranged in the filtering cavity;

[0010] Waste water can flow through the first filtering part and the second filtering part in sequence, and the mesh number of the first filtering holes on the first filtering part is less than the mesh number of the second filtering holes on the second filtering part;

[0011] The first filtering part and / or the second filtering part are provided with filter material chambers, and filter materials for adsorbing impurities in the waste water are accommodated in the filter material chambers.

[0012] According to the utility model, it further includes a cover plate;

[0013] An opening and an insertion interface are arranged on the box body; the cover plate can be detachably covered on the opening;

[0014] The first filtering part is detachably connected to the inner wall of the box body;

[0015] The second filtering part can be inserted into or pulled out of the filtering cavity through the insertion interface.

[0016] According to the present utility model, an L-shaped baffle is provided on the inner wall of the box body;

[0017] The first filtering part is a trough body with an open upper end, and a plurality of the first filtering holes are uniformly formed at the bottom of the first filtering part;

[0018] The second filtering part is located on one side below the first filtering part. The second filtering part is a trough body with an open upper end, and a plurality of second filtering holes are uniformly formed on two opposite first side walls of the second filtering part;

[0019] When the first filtering part is inserted into the filtering cavity, the peripheral wall of the first filtering part can abut against the inner wall of the box body and the vertical wall of the L-shaped baffle;

[0020] When the second filtering part is inserted into the filtering cavity, the upper end of the second filtering part can abut against the horizontal wall of the L-shaped baffle to close the upper opening of the second filtering part, and two opposite second side walls of the second filtering part are respectively used for abutting against the inner wall of the box body and closing the insertion opening.

[0021] According to the present utility model, a sealing ring is provided on one side of the cover plate close to the box body; when the cover plate covers the opening, the sealing ring is used to seal the gap between the cover plate and the opening.

[0022] According to the present utility model, the mesh number of the first filtering holes at the bottom of the first filtering part is 10 - 50 meshes, and the mesh number of the second filtering holes on two opposite side walls of the second filtering part is 80 - 800 meshes.

[0023] According to the present utility model, the inner cavity of the second filtering part is a filter material chamber, and the filter material is activated carbon or quartz sand.

[0024] According to the present utility model, water inlets and water outlets communicating with the filtering cavity are formed at both ends of the box body, and both the water inlets and the water outlets are communicated with external pipelines.

[0025] According to the present utility model, a drainage pipeline is further included;

[0026] The number of the water outlets is two, and the two water outlets are arranged at intervals up and down;

[0027] The drainage pipeline is in a Y shape. The main pipe of the drainage pipeline is communicated with the filtering cavity, and two branch pipes are respectively communicated with the two water outlets; a water pump is arranged on the branch pipe communicated with the upper water outlet, and an electric control valve is arranged on the branch pipe communicated with the lower water outlet; a protective box is arranged outside the electric control valve.

[0028] According to the present utility model, a limiting rod is fixedly connected to the outside of the side wall of the second filtering part for closing the insertion opening;

[0029] The wastewater filtering device further includes a locking assembly; the locking assembly is arranged on the outer wall of the box body;

[0030] When the second filtering part is inserted into the filtering cavity, the locking assembly is used to lock or unlock the limiting rod.

[0031] According to the present utility model, a slot is formed on one side of the limiting rod;

[0032] The locking assembly includes a driven gear, an annular rotating block, a locking shell, a motor and a driving gear;

[0033] The locking shell is fixed on the outer wall of the box body; the inner cavity of the locking shell is used to accommodate the driven gear, the annular rotating block, the motor and the driving gear;

[0034] The driven gear is arranged on the inner wall of the locking shell so as to be able to rotate around a horizontal axis relative to the locking shell; the annular rotating block and the driven gear are coaxially arranged and fixedly connected; sockets are formed through the peripheral walls of the locking shell, the driven gear and the annular rotating block.

[0035] The main body of the motor is fixed on the inner wall of the locking shell, and the driving end is drivingly connected to the driving gear, and the driving gear is rotatably connected to the inner wall of the locking shell; the driving gear and the driven gear are meshed.

[0036] When the second filtering part is inserted into the filtering cavity, the limiting rod can be inserted into the socket; the motor is used to drive the driving gear to rotate, and the driving gear drives the annular rotating block to rotate around a horizontal axis through the driven gear, so that the socket end of the annular rotating block can be inserted into or separated from the slot, so as to lock the second filtering part to the box body or unlock it from the box body.

[0037] (III) Beneficial effects

[0038] The beneficial effects of the present utility model are as follows: For the wastewater filtration device of the present utility model, a first filtration part and a second filtration part are detachably arranged in the filtration cavity of the box body, and the mesh number of the first filtration holes on the first filtration part is less than that of the second filtration holes on the second filtration part. During filtration, the wastewater discharged into the filtration cavity through a drainage pipe can flow through the first filtration part and the second filtration part in sequence and then be discharged through another drainage pipe. The first filtration part can filter out larger impurities, and the second filtration part can filter out smaller impurities, so as to improve the filtration effect of the wastewater. At the same time, a filter material chamber is provided on the first filtration part and / or the second filtration part, and filter materials for adsorbing impurities in the wastewater are accommodated in the filter material chamber, which can further adsorb impurities in the wastewater and improve the filtration effect. Furthermore, after the filtration device is used for a long time, the first filtration part and the second filtration part can be detached and the impurities on the first filtration holes and the second filtration holes can be cleaned to ensure the filtration performance of the wastewater filtration device. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 is a three-dimensional schematic diagram of the wastewater filtration device of the present utility model;

[0040] Figure 2 is an internal schematic diagram of the wastewater filtration device when the first filtration part and the second filtration part are inserted into the filtration cavity;

[0041] Figure 3 is an internal schematic diagram of the wastewater filtration device when the first filtration part and the second filtration part are inserted into the filtration cavity;

[0042] Figure 4 is Figure 2 a partial schematic diagram of (the protective box is in a partially sectional state);

[0043] Figure 5 is a three-dimensional schematic diagram of the cover plate;

[0044] Figure 6 is a three-dimensional schematic diagram of the first filtration part;

[0045] Figure 7 is a rear view of the locking assembly.

[0046]

DESCRIPTION OF THE REFERENCE NUMERALS

[0047] 1: box body; 11: filtration cavity; 12: water inlet; 13: water outlet; 14: opening; 15: insertion interface; 16: L-shaped baffle;

[0048] 2: cover plate; 21: sealing ring;

[0049] 31: first filtration part; 311: first filtration holes; 32: second filtration part; 321: second filtration holes; 322: limiting rod; 3221: slot;

[0050] 4: Locking assembly; 41: Driven gear; 42: Annular rotating block; 43: Locking housing; 44: Motor; 45: Driving gear; 451: Shaft; 46: Belt;

[0051] 5: Water pump;

[0052] 6: Drainage pipe;

[0053] 7: Electric control valve;

[0054] 8: Protection box;

[0055] A: Socket. Detailed implementation mode

[0056] For better explaining the present utility model for easy understanding, the present utility model will be described in detail below in conjunction with the accompanying drawings through specific implementation modes. Among them, the orientation nouns such as "upper" and "lower" mentioned in this article are referenced based on Figure 3 the orientation.

[0057] See Figures 1-7 , the waste water filtering device proposed by the embodiment of the present utility model includes a box body 1, a first filtering part 31 and a second filtering part 32.

[0058] A filtering cavity 11 is provided inside the box body 1, and the filtering cavity 11 can communicate with the drainage pipe 6. The first filtering part 31 and the second filtering part 32 are both detachably arranged in the filtering cavity 11. Waste water can flow through the first filtering part 31 and the second filtering part 32 in sequence, and the mesh number of the first filtering holes 311 on the first filtering part 31 is less than the mesh number of the second filtering holes 321 on the second filtering part 32. The first filtering part 31 and / or the second filtering part 32 are provided with filter material chambers, and filter materials for adsorbing impurities in the waste water are accommodated in the filter material chambers.

[0059] In this waste water filtering device, the first filtering part 31 and the second filtering part 32 are detachably arranged in the filtering cavity 11 of the box body 1, and the mesh number of the first filtering holes 311 on the first filtering part 31 is less than the mesh number of the second filtering holes 321 on the second filtering part. During filtering, the waste water discharged into the filtering cavity 11 from a drainage pipe 6 can flow through the first filtering part 31 and the second filtering part 32 in sequence and then be discharged through another drainage pipe 6. The first filtering part 31 can filter larger impurities, and the second filtering part 32 can filter smaller impurities, so as to improve the filtering effect of the waste water. At the same time, the first filtering part 31 and / or the second filtering part 32 are provided with filter material chambers, and filter materials for adsorbing impurities in the waste water are accommodated in the filter material chambers, which can further adsorb impurities in the waste water and improve the filtering effect. Furthermore, after the filtering device is used for a long time, the first filtering part 31 and the second filtering part 32 can be disassembled and the impurities on the first filtering holes 311 and the second filtering holes 321 can be cleaned to ensure the filtering performance of the waste water filtering device.

[0060] Further, water inlets 12 and outlets 13 communicating with the filtration chamber 11 are provided at both ends of the box body 1, and the water inlets 12 and outlets 13 are used to communicate with external pipelines.

[0061] Specifically, the wastewater filtration device further includes a drainage pipeline 6.

[0062] The number of the outlets 13 is two, and the two outlets 13 are arranged at intervals up and down. The drainage pipeline 6 is in a Y shape. The main pipe of the drainage pipeline 6 communicates with the filtration chamber 11, and the two branch pipes respectively communicate with the two outlets 13. A water pump 5 is arranged on the branch pipe communicating with the upper outlet 13, and an electric control valve 7 is arranged on the branch pipe communicating with the lower outlet 13.

[0063] The external pipeline can be connected to one of the two branch pipes to communicate with one of the two outlets 13. When the external pipeline communicates with the upper outlet 13, the water pump 5 is turned on and the electric control valve 7 is turned on, so that the wastewater in the filtration chamber 11 flows upward through the drainage pipeline 6 and is discharged to the external pipeline through the upper outlet 13. When the external pipeline communicates with the lower outlet 13, the electric control valve 7 is turned on and the water pump 5 is turned off, so that the wastewater in the filtration chamber 11 flows through the drainage pipeline 6 and is discharged to the external pipeline through the lower outlet 13.

[0064] Thus, by providing two upper and lower outlets 13 on the box body 1, it is convenient to adjust flexibly and is suitable for connecting external pipelines at different heights.

[0065] Preferably, a protective box 8 is provided outside the electric control valve 7. The protective box 8 is used to protect the electric control valve 7 and isolate the soil to prevent the soil from affecting the normal operation of the electric control valve 7. Specifically, the protective box 8 is fixed on the outer wall of the box body 1.

[0066] Further, the wastewater filtration device further includes a cover plate 2. An opening 14 is provided in the upper part of the box body 1, and an insertion port 15 is provided on the side wall. The cover plate 2 can be detachably covered on the opening 14.

[0067] The first filtration part 31 is detachably connected to the inner wall of the box body 1. The second filtration part 32 can be inserted into or pulled out of the filtration chamber 11 through the insertion port 15

[0068] When it is necessary to clean the first filtration holes 311 on the first filtration part 31: first remove the cover plate 2, then remove the first filtration part 31, and take out the first filtration part 31 from the opening 14 to clean the impurities on the first filtration holes 311. When it is necessary to clean the second filtration holes 321 on the second filtration part 32: first pull out the second filtration part 32 from the insertion port 15, and then clean the impurities on the second filtration holes 321. As can be seen from the above, the cleaning methods of the first filtration holes 311 and the second filtration holes 321 of the present wastewater filtration device are simple and convenient.

[0069] Optionally, the cover plate 2 is detachably covered on the opening 14 by bolts.

[0070] Preferably, an annular groove is formed on one side of the cover plate 2 close to the box body 1, and a first sealing ring 21 is clamped in the annular groove. When the cover plate 2 covers the opening 14, the first sealing ring 21 is used to seal the gap between the cover plate 2 and the opening 14 to prevent wastewater from overflowing from the gap between the cover plate 2 and the opening 14.

[0071] Furthermore, an L-shaped baffle 16 is arranged on the inner wall of the box body 1.

[0072] The first filtering part 31 is a trough body with an open upper end. A plurality of first filtering holes 311 are uniformly arranged at the bottom of the first filtering part 31. The second filtering part 32 is located on one side below the first filtering part 31. The second filtering part 32 is a trough body with an open upper end, and a plurality of second filtering holes 321 are uniformly arranged on two opposite first side walls of the second filtering part 32.

[0073] When the first filtering part 31 is inserted into the filtering cavity 11, the peripheral wall of the first filtering part 31 can abut against the inner wall of the box body 1 and the vertical wall of the L-shaped baffle 16. When the second filtering part 32 is inserted into the filtering cavity 11, the upper end of the second filtering part 32 can abut against the horizontal wall of the L-shaped baffle 16 to close the upper opening 14 of the second filtering part 32, and two opposite second side walls of the second filtering part 32 are respectively used to abut against the inner wall of the box body 1 and close the insertion opening 15.

[0074] Through the above settings, it can be ensured that the wastewater flows through the water inlet 12, the first filtering part 31, the second filtering part 32 and the water outlet 13 in sequence to ensure the filtering effect of the wastewater. At the same time, the setting that the second filtering part 32 closes the insertion opening 15 can also prevent the wastewater from overflowing from the insertion opening 15.

[0075] It should be noted that when it is necessary to clean the first filtering holes 311 on the first filtering part 31, the first filtering holes 311 can be cleaned from the upper opening 14 of the first filtering part 31 after taking out the first filtering part 31. When it is necessary to clean the second filtering holes 321 on the second filtering part 32, the second filtering holes 321 can be cleaned from the upper opening 14 of the second filtering part 32 after taking out the second filtering part 32.

[0076] Optionally, the connection mode between the first filtering part 31 and the box body 1 is as follows:

[0077] A baffle is arranged on the inner wall of the box body 1, and the first filtering part 31 is placed on the baffle to facilitate the placement and removal of the first filtering part 31; or, the first filtering part 31 is detachably connected to the inner wall of the box body 1 and the vertical wall surface of the L-shaped baffle 16 by bolts to improve the connection stability between the first filtering part 31 and the box body 1.

[0078] Further, the second filtering part 32 is used to open an annular groove on the peripheral wall of the second side wall that closes the insertion opening 15, and a second sealing ring is clamped in the annular groove to seal the gap between the second filtering part 32 and the insertion opening 15, further preventing wastewater from overflowing from the gap between the second filtering part 32 and the insertion opening 15.

[0079] Preferably, the mesh number of the first filtering holes 311 at the bottom of the first filtering part 31 is 10 - 50 meshes, and the mesh numbers of the second filtering holes 321 on the opposite side walls of the second filtering part 32 are both 80 - 800 meshes. This set of values can meet the filtering requirements for solid impurities such as stones and plants in the wastewater.

[0080] Preferably, the inner cavity of the second filtering part 32 is a filter material chamber, and the filter material is activated carbon or quartz sand, which can further adsorb impurities in the wastewater.

[0081] During use, first load the filter material into the inner cavity of the second filtering part 32, and then insert the second filtering part 32 into the filtering cavity 11. The upper end of the second filtering part 32 abuts against the horizontal wall surface of the L-shaped baffle 16 to close the upper opening 14, preventing the filter material from being impacted and displaced outside the second filtering part 32. At the same time, with the second filtering part 32 inserted into the filtering cavity 11, the second filtering part 32 can be conveniently taken out and the filter material can be replaced to ensure the adsorption performance of the filter material.

[0082] Further, a limiting rod 322 is fixedly connected to the outside of the second side wall of the second filtering part 32 that closes the insertion opening 15. The wastewater filtering device further includes a locking assembly 4. The locking assembly 4 is arranged on the outer wall of the box body 1.

[0083] When the second filtering part 32 is inserted into the filtering cavity 11, the locking assembly 4 is used to lock or unlock the limiting rod 322, and then lock the second filtering part 32 to the box body 1 or unlock it from the box body 1 to improve the connection stability between the second filtering part 32 and the box body 1 when filtering wastewater.

[0084] Specifically, a slot is opened on one side of the limiting rod 322. The locking assembly 4 includes a driven gear 41, an annular rotating block 42, a locking shell 43, a motor 44, and a driving gear 45.

[0085] The locking shell 43 is fixed on the outer wall of the box body 1. The inner cavity of the locking shell 43 is used to accommodate the driven gear 41, the annular rotating block 42, the motor 44, and the driving gear 45. The driven gear 41 is rotatably arranged on the inner wall of the locking shell 43 relative to the locking shell 43 around the horizontal axis. The annular rotating block 42 and the driven gear 41 are coaxially arranged and fixedly connected. The peripheral walls of the locking shell 43, the driven gear 41, and the annular rotating block 42 are all communicated with an insertion port A. The main body of the motor 44 is fixed on the inner wall of the locking shell 43, and the driving end is drivingly connected to the driving gear 45. The driving gear 45 is rotatably connected to the inner wall of the locking shell 43. The driving gear 45 and the driven gear 41 are meshed.

[0086] When the second filtering part 32 is inserted into the filtering cavity 11, the limiting rod 322 can be inserted into the socket A. The motor 44 is used to drive the driving gear 45 to rotate. The driving gear 45 drives the annular rotating block 42 to rotate around the horizontal axis through the driven gear 41, so that the socket end of the annular rotating block 42 can be inserted into or disengaged from the slot 3221 of the limiting rod 322, so as to lock the second filtering part 32 to the box body 1 or unlock it from the box body 1.

[0087] Specifically, the number of the driving gears 45 is two. The two driving gears 45 are arranged on both sides of the driven gear 41. The driving end of the motor 44 is sleeved on the shafts 451 of the two driving gears 45 through the belt 46 to drive the two driving gears 45 to rotate synchronously, and the two driving gears 45 synchronously drive the driven gear 41 to rotate, so as to improve the stability when the driven gear 41 drives the annular rotating block 42 to rotate.

[0088] Specifically, the locking shell 43 is fixed on the box body 1 by bolts. The driving gear 45 and the driven gear 41 are both rotatably connected to the inner wall of the locking shell 43 through bearings.

[0089] Specifically, the slot 3221 of the limiting rod 322 extends horizontally.

[0090] In the present utility model, unless otherwise clearly defined and limited, the terms "installation", "connection", "connection", "fixation" and other terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated. It can be a mechanical connection or an electrical connection. It can be directly connected or indirectly connected through an intermediate medium. It can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0091] In the present utility model, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0092] In the description of this specification, the descriptions of terms such as "one embodiment", "some embodiments", "embodiment", "example", "specific example" or "some examples" mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0093] Although the embodiments of the present utility model have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be construed as a limitation to the present utility model. Those of ordinary skill in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present utility model.

Claims

1. A wastewater filtration device, characterized in that, It includes a box body (1), a first filtering part (31) and a second filtering part (32); Inside the box body (1), there is a filtering cavity (11), and the filtering cavity (11) can communicate with a drainage pipe (6); Both the first filtering part (31) and the second filtering part (32) are detachably arranged in the filtering cavity (11); Wastewater can flow through the first filtering part (31) and the second filtering part (32) in sequence, and the mesh number of the first filtering holes (311) on the first filtering part (31) is less than the mesh number of the second filtering holes (321) on the second filtering part (32); The first filtering part (31) and / or the second filtering part (32) are provided with a filter material chamber, and filter materials for adsorbing impurities in the wastewater are accommodated in the filter material chamber.

2. The wastewater filtration device according to claim 1, wherein, It further includes a cover plate (2); An opening (14) and an insertion interface (15) are provided on the box body (1); the cover plate (2) can be detachably covered on the opening (14); The first filtering part (31) is detachably connected to the inner wall of the box body (1); The second filtering part (32) can be inserted into or pulled out of the filtering cavity (11) through the insertion interface (15).

3. The wastewater filtration device according to claim 2, wherein An L-shaped baffle (16) is arranged on the inner wall of the box body (1); The first filtering part (31) is a trough body with an open upper end, and a plurality of the first filtering holes (311) are uniformly arranged at the bottom of the first filtering part (31); The second filtering part (32) is located below and on one side of the first filtering part (31). The second filtering part (32) is a trough body with an open upper end, and a plurality of second filtering holes (321) are uniformly arranged on two opposite first side walls of the second filtering part (32); When the first filtering part (31) is inserted into the filtering cavity (11), the peripheral wall of the first filtering part (31) can abut against the inner wall of the box body (1) and the vertical wall of the L-shaped baffle (16); When the second filtering part (32) is inserted into the filtering cavity (11), the upper end of the second filtering part (32) can abut against the horizontal wall of the L-shaped baffle (16) to close the upper end opening of the second filtering part (32), and two opposite second side walls of the second filtering part (32) are respectively used to abut against the inner wall of the box body (1) and close the insertion interface (15).

4. The wastewater filtration device according to claim 2, characterized in that, A sealing ring (21) is arranged on one side of the cover plate (2) close to the box body (1); when the cover plate (2) is covered on the opening (14), the sealing ring (21) is used to seal the gap between the cover plate (2) and the opening (14).

5. The wastewater filtration device according to claim 3, characterized in that, The mesh number of the first filtering holes (311) at the bottom of the first filtering part (31) is 10 - 50 meshes, and the mesh number of the second filtering holes (321) on two opposite side walls of the second filtering part (32) is 80 - 800 meshes.

6. The wastewater filtering device according to claim 3, characterized in that, The inner cavity of the second filtering part (32) is a filter material chamber, and the filter material is activated carbon or quartz sand.

7. The wastewater filtering device according to claim 2, wherein Both ends of the box body (1) are provided with a water inlet (12) and a water outlet (13) that communicate with the filtration chamber (11). The water inlet (12) and the water outlet (13) are both connected to external pipelines.

8. The wastewater filtration device according to claim 7, wherein It further includes a drainage pipeline (6); The number of the water outlets (13) is two, and the water outlets (13) are arranged at an upper and lower interval; The drainage pipeline (6) is Y-shaped. The main pipe of the drainage pipeline (6) communicates with the filtration chamber (11), and two branch pipes are respectively connected to the two water outlets (13); a water pump (5) is arranged on the branch pipe connected to the upper water outlet (13), and an electric control valve (7) is arranged on the branch pipe connected to the lower water outlet (13); a protective box (8) is arranged outside the electric control valve (7).

9. The wastewater filtration device according to claim 2, wherein, The second filtering part (32) is used for fixedly connecting a limiting rod (322) to the outer side wall of the insertion port (15); The waste water filtering device further includes a locking assembly (4); the locking assembly (4) is arranged on the outer wall of the box body (1); When the second filtering part (32) is inserted into the filtration chamber (11), the locking assembly (4) is used for locking or unlocking the limiting rod (322).

10. The wastewater filtration device according to claim 9, characterized in that, A slot (3221) is formed on one side of the limiting rod (322); The locking assembly (4) includes a driven gear (41), an annular rotating block (42), a locking shell (43), a motor (44) and a driving gear (45); The locking shell (43) is fixed on the outer wall of the box body (1); the inner cavity of the locking shell (43) is used for accommodating the driven gear (41), the annular rotating block (42), the motor (44) and the driving gear (45); The driven gear (41) is arranged on the inner wall of the locking shell (43) so as to be able to rotate around a horizontal axis relative to the locking shell (43); the annular rotating block (42) and the driven gear (41) are coaxially arranged and fixedly connected; insertion ports (A) are formed in communication with the peripheral walls of the locking shell (43), the driven gear (41) and the annular rotating block (42); The main body of the motor (44) is fixed on the inner wall of the locking shell (43), and the driving end is drivingly connected to the driving gear (45). The driving gear (45) is rotatably connected to the inner wall of the locking shell (43); the driving gear (45) and the driven gear (41) are meshed; When the second filtering part (32) is inserted into the filtration chamber (11), the limiting rod (322) can be inserted into the insertion port (A); the motor (44) is used for driving the driving gear (45) to rotate, and the driving gear (45) drives the annular rotating block (42) to rotate around a horizontal axis through the driven gear (41), so that the insertion port end of the annular rotating block (42) can be inserted into or separated from the slot (3221), so as to lock the second filtering part (32) to the box body (1) or unlock it from the box body (1).

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