A rainwater and sewage inspection well and mounting structure

Abstract

This invention pertains to a stormwater and sewage inspection well in the field of urban drainage technology. It includes an inspection well body, a well cover, and a water seal box. The key features are: three guide pipes on each of the left and right sides of the inspection well body; a main flow channel and a secondary flow channel on each of the left and right sides of the bottom of the inspection well body; cleaning grooves near the guide pipes in both the main and secondary flow channels; the well cover is placed on top of the inspection well body; two first shafts are rotatably installed at the intersection of the main and secondary flow channels; cleaning components are provided in the cleaning grooves; a drive shaft is horizontally and rotatably installed within the inspection well body; a first rod sleeve is provided on one baffle plate, and second rod sleeves are provided on the other two baffle plates; the two baffle plates are fixed and rotatably installed on the drive shaft via the first and second rod sleeves, respectively. This inspection well combines the functions of a stormwater and sewage inspection well and has a diversion function, reducing the drainage pressure of stormwater and sewage on one hand and saving costs on the other.

Description

Technical Field

[0001] This invention belongs to the field of urban drainage technology, and specifically relates to a stormwater and sewage inspection well and its installation structure. Background Technology

[0002] Rainwater inspection wells have holes on their sides connecting to drainage pipes, and a downward-extending seepage pipe at the bottom to mitigate ground subsidence and prevent road flooding during heavy rain. Sewage inspection wells are manholes installed in drainage pipe systems for inspecting and cleaning pipes. They also serve as ventilation points connecting pipe sections and the entire system. Pipe sections between adjacent wells should be in a straight line; therefore, inspection wells are required at points where pipe cross-sections change, slopes change, junctions, and elevations change. Long straight pipe sections also require segmented installation of inspection wells (the spacing between segments is determined according to pipe diameter and the type of rainwater or sewage). The essential difference between rainwater and sewage inspection wells is whether or not they can directly discharge into waterways. In urban drainage systems, rainwater and sewage inspection wells are installed separately and use different pipelines, resulting in high construction costs. During heavy rain, rainwater inspection wells experience high drainage pressure while sewage inspection wells remain idle, wasting urban drainage resources. Furthermore, existing rainwater and sewage inspection wells cannot adjust the drainage direction according to the drainage pressure of each connecting pipe in practical engineering. Therefore, we urgently need to invent a combined rainwater and sewage inspection well and its installation structure that can adjust the drainage direction according to drainage pressure. Summary of the Invention

[0003] To solve the above-mentioned technical problems, the present invention provides the following technical solution:

[0004] This invention relates to a rainwater and sewage inspection system, comprising an inspection well body, a well cover, and a water seal box. The inspection well body has three guide pipes on each of its left and right sides. A main flow channel and a secondary flow channel are formed on each of the left and right sides of the bottom of the inspection well body. Cleaning grooves are provided near the guide pipes in both the main and secondary flow channels. The well cover is placed on top of the inspection well body. A flow guiding assembly is provided at the intersection of the main and secondary flow channels. The flow guiding assembly includes guide plates, a second shaft, and a first mounting bracket. The first shaft is fixedly inserted into the two guide plates. The shafts are rotatably mounted at the intersection of the main flow channel and the secondary flow channel. A cleaning component is provided in the cleaning channel. A flow-blocking component is provided in the inspection well body. The flow-blocking component includes a flow-blocking plate, a drive shaft, and a second mounting bracket. The drive shaft is rotatably mounted in the inspection well body in a horizontal forward and backward direction. There are two flow-blocking plates, which are respectively placed on the top of the main flow channel and the secondary flow channel on both sides. One flow-blocking plate is provided with a first rod sleeve, and the other flow-blocking plate is provided with a second rod sleeve. The two flow-blocking plates are fixed and rotatably mounted on the drive shaft by the first rod sleeve and the second rod sleeve, respectively.

[0005] As a preferred embodiment of the present invention, the two ends of the main flow channel are respectively connected to two opposing guide pipes on the same side, the secondary flow channel is connected to the guide pipe on the side, and both the main flow channel and the secondary flow channel are arc-shaped.

[0006] As a preferred embodiment of the present invention, the inspection well body is fixedly equipped with a fall protection net, a water level monitor and a ladder. The water level monitor is located above the fall protection net. There are two ladders, which are respectively located on both sides of the fall protection net. A lip plate is provided at the top edge of the inspection well body.

[0007] As a preferred embodiment of the present invention, the manhole cover has multiple water channels, the bottom of the manhole cover has a water storage chamber, the bottom of the water storage chamber has a drain pipe, the top of the water seal box has a filter screen fixedly installed, the center of the filter screen has a screw sleeve, and the water seal box is threadedly installed on the drain pipe through the screw sleeve.

[0008] As a preferred embodiment of the present invention, the bottom ends of the two first shafts extend to the outer side of the bottom of the inspection well body and are fixedly mounted with first gears. The two second shafts are fixedly mounted with second gears, which mesh with the first gears. The first mounting bracket is fixedly mounted at the bottom of the inspection well body and located between the two second gears. Guide grooves are provided on both sides of the first mounting bracket. A double-rod hydraulic cylinder is fixedly mounted on the first mounting bracket. The two output ends of the double-rod hydraulic cylinder are fixedly mounted with first toothed plates, which are slidably mounted in the guide grooves. The double-rod hydraulic cylinder is equipped with a two-way valve.

[0009] As a preferred embodiment of the present invention, the cleaning assembly includes an impeller and a third shaft. The impeller is rotatably mounted to the manhole body. The impeller shaft extends to the outer side of the bottom of the manhole body and is fixedly mounted with a ratchet. The third shaft is rotatably mounted to the bottom of the manhole body. A pawl is fixedly mounted on the third shaft. The pawl is adapted to the ratchet. A torsion spring is fixedly mounted between the third shaft and the bottom of the manhole body. The blades of the impeller are arc-shaped with the inner arc surface facing the main flow channel. The limiting directions of the ratchet and the torsion spring are both facing the outer arc surface.

[0010] As a preferred embodiment of the present invention, one end of the second rod sleeve and the transmission shaft both extend to the outside of the inspection well body and are fixedly mounted with a third gear. The second mounting bracket is fixedly mounted at the rear end of the inspection well body. Two guide slide rods and one drive screw are symmetrically fixedly mounted on the left and right sides inside the second mounting bracket. Two drive motors are fixedly mounted on the top of the second mounting bracket. The output ends of the two drive motors are respectively fixedly connected to the two drive screws. Second toothed plates are slidably mounted on the two guide slide rods. The two second toothed plates are symmetrically provided with teeth in the front and rear halves. The two second toothed plates are respectively meshed with the two third gears.

[0011] This invention relates to an installation structure for a stormwater and sewage inspection well, comprising a ground surface, a poured concrete layer, and a backfill layer. The poured concrete layer is located on the outside of the inspection well body, the ground surface is located on top of the poured concrete layer, the backfill layer is located at the bottom of the poured concrete layer, and multiple water passages are provided between the backfill layer and the poured concrete layer at positions corresponding to the guide pipes.

[0012] As a preferred embodiment of the present invention, an adhesive layer is provided on the inner side of the poured concrete layer, and multiple reinforcing steel bars are inserted between the adhesive layer and the poured concrete layer. A placement groove is provided on the top of the landfill layer, and the inspection well body is placed in the placement groove.

[0013] The beneficial effects achieved by this invention are:

[0014] This inspection well combines the functions of a rainwater inspection well and a sewage inspection well. The main flow channel and the secondary flow channel on both sides serve as rainwater pipe network channels and sewage pipe network channels, respectively. The extension and retraction of the double-rod hydraulic cylinder drives the first guide plate to rotate to the main flow channel and the secondary flow channel. It can also adjust the flow direction according to the drainage pressure of each pipe, so as to achieve the purpose of selecting the flow channel according to the drainage pressure of rainwater and sewage.

[0015] The drive motor rotates two baffles, which can adjust the drainage channel according to the rainwater and sewage drainage pressure. When the rainwater drainage pressure is high, both baffles open, which can reduce the drainage pressure of the rainwater drainage network.

[0016] The water flow drives the impeller to rotate, which can change the direction of drainage and play a guiding role. The rotation of the impeller can also guide foreign objects into the guide pipe for drainage and prevent blockage. Furthermore, the ratchet and pawl limit action can prevent water backflow.

[0017] Rainwater from the road surface can be channeled into the water storage chamber through the drainage channel, and then discharged into the water seal box through the drain pipe. When the rainwater level is higher than the water seal box, it overflows. The filter screen can filter out solid foreign objects, which not only prevents the inspection well from becoming clogged, but also prevents backflow of odors by utilizing the water seal principle. When cleaning foreign objects, simply remove the manhole cover and rotate the water seal box to remove the foreign objects. Attached Figure Description

[0018] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0019] Figure 1 This is a schematic diagram of a stormwater and sewage inspection well and its installation structure according to the present invention;

[0020] Figure 2This is a schematic diagram of the structure of a stormwater and sewage inspection well according to the present invention. Figure 1 ;

[0021] Figure 3 This is a schematic diagram of the structure of a stormwater and sewage inspection well according to the present invention. Figure 2 ;

[0022] Figure 4 This is a schematic diagram of the structure of a stormwater and sewage inspection well according to the present invention. Figure 3 ;

[0023] Figure 5 This is a partial cross-sectional view of the inspection well body in a stormwater and sewage inspection well according to the present invention;

[0024] Figure 6 This is a top view of the bottom of the inspection well body in a stormwater and sewage inspection well according to the present invention;

[0025] Figure 7 This is a schematic diagram of the structure of a flow guiding component in a stormwater and sewage inspection well according to the present invention;

[0026] Figure 8 This is a schematic diagram of the structure of a cleaning component in a stormwater and sewage inspection well according to the present invention;

[0027] Figure 9 This is a schematic diagram of the flow-blocking component in a stormwater and sewage inspection well according to the present invention. Figure 1 ;

[0028] Figure 10 This is a schematic diagram of the flow-blocking component in a stormwater and sewage inspection well according to the present invention. Figure 2 ;

[0029] Figure 11 This is a partial cross-sectional view of a manhole cover for a stormwater and sewage inspection well according to the present invention.

[0030] In the diagram: 1. Inspection well body; 101. Diversion pipe; 102. Main diversion channel; 103. Secondary diversion channel; 104. Cleaning channel; 105. Base cover; 106. Control box; 107. Protective shell; 108. Fall protection net; 109. Water level monitor; 110. Ladder; 111. Lip plate;

[0031] 2. Manhole cover; 201. Water channel; 202. Water storage chamber; 203. Drain pipe;

[0032] 3. Water seal box; 301. Filter screen; 302. Screw sleeve;

[0033] 4. Flow guiding assembly; 401. Flow guiding plate; 402. Second shaft; 403. First mounting bracket; 404. First shaft; 405. First gear; 406. Second gear; 407. Guide groove; 408. Double-rod hydraulic cylinder; 409. First gear plate; 410. Two-way valve;

[0034] 5. Cleaning components; 501. Impeller; 502. Third shaft; 503. Ratchet; 504. Pad; 505. Torsion spring;

[0035] 6. Baffle assembly; 601. Baffle plate; 602. Drive shaft; 603. Second mounting bracket; 604. First rod sleeve; 605. Second rod sleeve; 606. Third gear; 607. Guide slide rod; 608. Drive screw; 609. Drive motor; 610. Second gear plate;

[0036] 7. Ground;

[0037] 8. Pour the concrete layer; 801. Bonding layer; 802. Reinforcing steel bars;

[0038] 9. Landfill layer; 901. Placement trench; 10. Water culvert. Detailed Implementation

[0039] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0040] Example: Figure 1-11As shown, a stormwater and sewage inspection well includes an inspection well body 1, a well cover 2, and a water seal box 3. Three guide pipes 101 are provided on both the left and right sides of the inspection well body 1. A main flow channel 102 and a secondary flow channel 103 are provided on both the left and right sides of the bottom of the inspection well body 1. Cleaning grooves 104 are provided near the guide pipes 101 on both the main flow channel 102 and the secondary flow channel 103. A base cover 105 and a control box 106 are fixedly installed at the bottom of the inspection well body 1, with the control box 106 located inside the base cover 105. A protective shell 107 is fixedly installed on the rear side of the inspection well body 1. The well cover 2 is placed on top of the inspection well body 1. A flow guiding assembly 4 is provided at the intersection of the main flow channel 102 and the secondary flow channel 103. The flow guiding assembly 4 includes a guide plate 401, a second shaft 402, and a first mounting bracket 403. A first shaft 404 is fixedly inserted into the flow guide plate 401. Both first shafts 404 are rotatably installed at the intersection of the main flow channel 102 and the secondary flow channel 103. A cleaning component 5 is provided in the cleaning channel 104. A flow blocking component 6 is provided in the inspection well body 1. The flow blocking component 6 includes a flow blocking plate 601, a drive shaft 602, and a second mounting bracket 603. The drive shaft 602 is rotatably installed in the inspection well body 1 in a horizontal and backward direction. Two flow blocking plates 601 are provided and are respectively placed on the top of the main flow channel 102 and the secondary flow channel 103 on both sides. One flow blocking plate 601 is provided with a first rod sleeve 604, and the other two flow blocking plates 601 are provided with a second rod sleeve 605. The two flow blocking plates 601 are fixed and rotatably installed on the drive shaft 602 by the first rod sleeve 604 and the second rod sleeve 605 respectively.

[0041] In use, multiple inspection well bodies 1 are connected by corrugated pipes. The main flow channel 102 and the secondary flow channel 103 on both sides serve as rainwater pipe network channels and sewage pipe network channels, respectively. On the one hand, rainwater flows into the inspection well body 1 through the manhole cover 2 and into the main flow channel 102 and the secondary flow channel 103, and is connected through the flow pipe 101.

[0042] The two ends of the main flow channel 102 are connected to two opposite flow guide pipes 101 on the same side, and the secondary flow guide channel 103 is connected to the flow guide pipe 101 on the side. Both the main flow channel 102 and the secondary flow guide channel 103 are arc-shaped.

[0043] When in use, the rainwater and sewage channels are divided into two channels, and the diversion channel can be selected according to the rainwater and sewage drainage pressure.

[0044] The inspection well body 1 is fixedly installed with a fall protection net 108, a water level monitor 109 and a ladder 110. The water level monitor 109 is located above the fall protection net 108. There are two ladders 110, which are respectively located on both sides of the fall protection net 108. A lip plate 111 is provided at the top edge of the inspection well body 1.

[0045] When in use, if an inspection is required, the manhole cover 2 can be opened and the ladder 110 can be used to descend for maintenance. The fall protection net 108 can effectively prevent people from falling accidentally. The water level detector can monitor the rainwater storage pressure and report it to the background control center for timely feedback.

[0046] The manhole cover 2 has multiple water channels 201, the bottom of the manhole cover 2 has a water storage chamber 202, the bottom of the water storage chamber 202 has a drain pipe 203, the top of the water seal box 3 has a filter screen 301 fixedly installed, the center of the filter screen 301 has a screw sleeve 302, and the water seal box 3 is threadedly installed on the drain pipe 203 through the screw sleeve 302.

[0047] In use, rainwater from the road surface can be guided into the water storage chamber 202 through the water channel 201, and then discharged into the water seal box 3 through the drain pipe 203. When the rainwater level is higher than the water seal box 3, it overflows. The filter screen 301 can filter solid foreign objects, which not only prevents the inspection well from being blocked, but also prevents backflow of odors by using the water seal principle. When cleaning foreign objects, simply remove the manhole cover 2 and rotate the water seal box 3 to remove the water seal box 3 to clean the foreign objects.

[0048] The bottom ends of the two first shafts 404 extend to the outer side of the bottom of the inspection well body 1 and are fixedly installed with first gears 405. The two second shafts 402 are fixedly installed with second gears 406, which mesh with the first gears 405. The first mounting bracket 403 is fixedly installed at the bottom of the inspection well body 1 and is located between the two second gears 406. The first mounting bracket 403 has guide grooves 407 on both sides. The first mounting bracket 403 is fixedly installed with a double-rod hydraulic cylinder 408. The two output ends of the double-rod hydraulic cylinder 408 are fixedly installed with first toothed plates 409. The first toothed plates 409 are slidably installed in the guide grooves 407. The double-rod hydraulic cylinder 408 is equipped with a two-way valve 410.

[0049] In use, the extension and retraction of the double-rod hydraulic cylinder 408 drives the first toothed plate 409 to slide on the guide groove 407. The movement of the first toothed plate 409 drives the second gear 406 to rotate, and the second gear 406 drives the first gear 405 to rotate. The rotation of the first gear 405 drives the guide plate 401 to rotate to the main flow channel 102 and the secondary flow channel 103 through the first shaft 404. The flow direction can be adjusted according to the drainage pressure of each pipe.

[0050] The cleaning assembly 5 includes an impeller 501 and a third shaft 502. The impeller 501 is rotatably mounted to the inspection well body 1. The shaft of the impeller 501 extends to the outer side of the bottom of the inspection well body 1 and is fixedly mounted with a ratchet 503. The third shaft 502 is rotatably mounted to the bottom of the inspection well body 1. A pawl 504 is fixedly mounted on the third shaft 502. The pawl 504 is adapted to the ratchet 503. A torsion spring 505 is fixedly mounted between the third shaft 502 and the bottom of the inspection well body 1. The blades of the impeller 501 are arc-shaped and the inner arc surface faces the main flow channel 102. The limiting directions of the ratchet 503 and the torsion spring 505 are both facing the outer arc surface.

[0051] When in use, the water flow drives the impeller 501 to rotate, which can change the direction of drainage and play a guiding role. The rotation of the impeller 501 can also guide foreign objects into the guide pipe 101 for guidance, preventing blockage. Furthermore, the limiting effect of the ratchet 503 and the pawl 504 can prevent the water flow from flowing back.

[0052] The second sleeve 605 and the drive shaft 602 both extend to the outside of the inspection well body 1 and are both fixedly installed with a third gear 606. The second mounting bracket 603 is fixedly installed at the rear end of the inspection well body 1. Two guide slide rods 607 and a drive screw 608 are symmetrically fixedly installed on the left and right sides inside the second mounting bracket 603. Two drive motors 609 are fixedly installed on the top of the second mounting bracket 603. The output ends of the two drive motors 609 are fixedly connected to the two drive screws 608 respectively. The second toothed plates 610 are slidably installed on the two guide slide rods 607. The two second toothed plates 610 are symmetrically provided with teeth in the front and rear halves. The two second toothed plates 610 are respectively meshed with the two third gears 606.

[0053] In use, the drive motor 609 drives the drive screw 608 to rotate. The rotation of the drive screw 608 drives the second gear plate 610 to move up and down. The movement of the second gear plate 610 drives the third gear 606 to rotate. The rotation of the two third gears 606 can drive the two baffle plates 601 to rotate respectively. The drainage channel can be adjusted according to the rainwater and sewage drainage pressure. When the rainwater drainage pressure is high, both baffle plates 601 are opened, which can reduce the drainage pressure of the rainwater drainage network in the sewage drainage network.

[0054] An installation structure for a stormwater and sewage inspection well includes a ground surface 7, a poured concrete layer 8, and a backfill layer 9. The structure is characterized by: the poured concrete layer 8 being located on the outside of the inspection well body 1; the ground surface 7 being located on top of the poured concrete layer 8; the backfill layer 9 being located at the bottom of the poured concrete layer 8; multiple water passages 10 being provided between the backfill layer 9 and the poured concrete layer 8 at positions corresponding to the guide pipe 101; an adhesive layer 801 being provided on the inner side of the poured concrete layer 8; multiple reinforcing steel bars 802 being inserted between the adhesive layer 801 and the poured concrete layer 8; a placement groove 901 being provided on the top of the backfill layer 9; and the inspection well body 1 being fixedly attached to the placement groove 901 by a base cover 105.

[0055] When in use, the casting method is adopted, which is more convenient and faster. Furthermore, the addition of the adhesive layer 801 and the reinforcing steel bar 802 can improve the overall installation strength.

[0056] In the description of this invention, it should be understood that the terms "coaxial," "bottom," "one end," "top," "middle," "other end," "upper," "side," "top," "inner," "front," "center," "both ends," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0057] Furthermore, the terms "first," "second," "third," and "fourth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first," "second," "third," or "fourth" may explicitly or implicitly include at least one of those features.

[0058] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "setting," "connection," "fixing," "screw connection," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0059] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A combined sewer inspection chamber comprising a chamber body (1), a chamber cover (2) and a water seal box (3), characterised in that: The inspection well body (1) is provided with three guide pipes (101) on both the left and right sides. The bottom of the inspection well body (1) is provided with a main flow channel (102) and a secondary flow channel (103) on both the left and right sides. The two ends of the main flow channel (102) are connected to the two guide pipes (101) on the same side respectively. The secondary flow channel (103) is connected to the guide pipe (101) on the side. The main flow channel (102) and the secondary flow channel (103) on both sides serve as rainwater pipe network channels and sewage pipe network channels respectively. The main flow channel (102) and the secondary flow channel (103) are provided with cleaning grooves (104) near the guide pipes (101). The well cover (2) is placed on the top of the inspection well body (1). The flow guide component (4) is provided at the intersection of the main flow channel (102) and the secondary flow channel (103). The flow guiding assembly (4) includes a flow guiding plate (401), a second shaft (402), and a first mounting bracket (403). The first shaft (404) is fixedly inserted into the two flow guiding plates (401). The two first shafts (404) are rotatably installed at the intersection of the main flow channel (102) and the secondary flow guiding channel (103). The cleaning channel (104) is provided with a cleaning assembly (5). The inspection well body (1) is provided with a flow-blocking assembly (6). The flow-blocking assembly (6) includes a flow-blocking plate (601), a drive shaft (602), and a second mounting bracket (603). The drive shaft (602) is horizontally and rotatably installed in the inspection well body (1). There are two flow-blocking plates (601) and they are respectively placed on the top of the main flow channel (102) and the secondary flow channel (103) on both sides. One flow-blocking plate (601) is provided with a first rod sleeve (604), and the other flow-blocking plate (601) is provided with a second rod sleeve (605). The two flow-blocking plates (601) are fixed and rotatably installed on the drive shaft (602) by the first rod sleeve (604) and the second rod sleeve (605), respectively. Both (605) and the drive shaft (602) extend to the outside of the inspection well body (1) and are fixedly installed with a third gear (606). Two guide slide rods (607) and a drive screw (608) are symmetrically fixedly installed on the left and right sides inside the second mounting bracket (603). Two drive motors (609) are fixedly installed on the top of the second mounting bracket (603). The output ends of the two drive motors (609) are fixedly connected to the two drive screws (608) respectively. Second toothed plates (610) are slidably installed on the two guide slide rods (607). The two second toothed plates (610) are symmetrically provided with teeth in the front and rear halves. The two second toothed plates (610) are respectively meshed with the two third gears (606).

2. The stormwater and sewage inspection well according to claim 1, characterized in that: Both the main guide channel (102) and the secondary guide channel (103) are arc-shaped.

3. The rainwater and sewage inspection well according to claim 1, characterized in that: The inspection well body (1) is fixedly installed with a fall protection net (108), a water level monitor (109) and a ladder (110). The water level monitor (109) is located above the fall protection net (108). There are two ladders (110) respectively located on both sides of the fall protection net (108). A lip plate (111) is provided at the top edge of the inspection well body (1).

4. The rainwater and sewage inspection well according to claim 1, characterized in that: The manhole cover (2) has multiple water channels (201), the bottom of the manhole cover (2) is provided with a water storage chamber (202), the bottom of the water storage chamber (202) is provided with a drain pipe (203), the top of the water seal box (3) is fixedly installed with a filter screen (301), the center of the filter screen (301) is provided with a screw sleeve (302), and the water seal box (3) is threadedly installed on the drain pipe (203) through the screw sleeve (302).

5. The rainwater and sewage inspection well according to claim 1, characterized in that: The bottom ends of the two first shafts (404) extend to the outer side of the bottom of the inspection well body (1) and are fixedly installed with first gears (405). The two second shafts (402) are fixedly installed with second gears (406). The second gears (406) mesh with the first gears (405). The first mounting bracket (403) is fixedly installed at the bottom of the inspection well body (1) and located between the two second gears (406). The first mounting bracket (403) has guide grooves (407) on both sides. The first mounting bracket (403) is fixedly installed with a double-rod hydraulic cylinder (408). The two output ends of the double-rod hydraulic cylinder (408) are fixedly installed with first toothed plates (409). The first toothed plates (409) are slidably installed in the guide grooves (407). The double-rod hydraulic cylinder (408) is provided with a two-way valve (410).

6. The combined rainwater and sewage inspection well according to claim 1, wherein: The cleaning assembly (5) includes an impeller (501) and a third shaft (502). The impeller (501) is rotatably mounted to the manhole body (1). The shaft of the impeller (501) extends to the outer side of the bottom of the manhole body (1) and is fixedly mounted with a ratchet (503). The third shaft (502) is rotatably mounted to the bottom of the manhole body (1). A pawl (504) is fixedly mounted on the third shaft (502). The pawl (504) is adapted to the ratchet (503). A torsion spring (505) is fixedly mounted between the third shaft (502) and the bottom of the manhole body (1). The blades of the impeller (501) are arc-shaped and the inner arc surface faces the main flow channel (102). The limiting directions of the ratchet (503) and the torsion spring (505) are both facing the outer arc surface.

7. The rainwater and sewage inspection well according to claim 1, characterized in that: The second mounting bracket (603) is fixedly installed at the rear end of the inspection well body (1).

8. The installation structure of a stormwater and sewage inspection well according to claim 1, comprising a ground surface (7), a poured concrete layer (8), and a backfill layer (9), characterized in that: The concrete layer (8) is located outside the manhole body (1), the ground (7) is located on top of the concrete layer (8), the fill layer (9) is located at the bottom of the concrete layer (8), and multiple water passages (10) are opened between the fill layer (9) and the concrete layer (8) at the corresponding position of the guide pipe (101).

9. The installation structure of a rain sewage inspection well according to claim 8, characterized in that: An adhesive layer (801) is provided on the inner side of the poured concrete layer (8), and multiple reinforcing steel bars (802) are inserted between the adhesive layer (801) and the poured concrete layer (8). A placement groove (901) is opened on the top of the landfill layer (9), and the inspection well body (1) is placed in the placement groove (901).

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