Rainwater and sewage inspection well connecting structure

Abstract

The utility model relates to a rainwater and sewage inspection well connecting structure belongs to inspection well installation technical field, including concrete basement, downhole pipe, upper well pipe, apron, pipeline body, support block, be equipped with filling cavity in support block, be equipped with the support arc groove of support pipeline body bottom on the opposite two side walls of support block, the outer end of mounting hole is equipped with the sealing hole of taper, be equipped with the sealing ring of filling on pipeline body in sealing hole, the outside of sealing ring is equipped with polyurethane sealing paste no.

Description

Technical Field

[0001] This utility model relates to a connection structure for rainwater and sewage inspection wells, belonging to the field of inspection well installation technology. Background Technology

[0002] In stormwater and sewage discharge systems, manholes are core components for pipe connection and maintenance, and the quality of their connection to the pipe body directly affects the system's operational stability. Existing manhole connection structures have the following problems: Poor sealing performance: The gap between the pipe body and the installation hole of the manhole pipe is mostly filled with a single sealing material. Under the long-term impact of water flow and soil settlement, the seal is prone to failure, resulting in rainwater and sewage leakage and pollution of groundwater and soil. Insufficient support stability: The part of the pipeline extending out of the well pipe lacks a reliable support structure and is prone to settlement due to soil pressure and the pipeline's own weight, which can lead to misalignment of the pipeline joints or even breakage.

[0003] To address the aforementioned issues, there is an urgent need to design a manhole connection structure that combines high sealing performance and strong support to overcome the shortcomings of existing technologies. Utility Model Content

[0004] This utility model provides a connection structure for rainwater and sewage inspection wells, which solves the problems existing in the background art.

[0005] This utility model relates to a connection structure for rainwater and sewage inspection wells, including a concrete base set at the bottom of a rainwater and sewage trench. A lower well pipe, an upper well pipe, and a cover plate are sequentially connected above the concrete base. The lower well pipe has an installation hole, and a pipe body is installed inside the installation hole. A support block is provided at the bottom of the pipe body outside the lower well pipe. A filling cavity is provided inside the support block. Support arc grooves supporting the bottom of the pipe body are provided on the opposite side walls of the support block. A conical sealing hole is provided at the outer end of the installation hole. A sealing ring is provided inside the sealing hole and fitted on the pipe body. A polyurethane sealant is provided outside the sealing ring. A concrete support layer is filled in the gap between the support block and the lower well pipe. The concrete support layer covers the lower part of the polyurethane sealant and the top of the concrete support layer is flush with the support block. A concrete filling layer is provided in the filling cavity of the support block.

[0006] As a preferred option, the bottom of the stormwater and sewage trench is equipped with an installation trough, within which the concrete base rests. Both the stormwater and sewage trenches have a medium-coarse sand cushion layer at the bottom. The installation trough ensures that the height of the pipe body matches the installation hole, while the medium-coarse sand cushion layer levels the bottom of the trench and installation trough, buffering the impact of uneven soil settlement on the concrete base and reducing cracking or displacement caused by soil settlement. This provides a stable bottom bearing foundation for the entire inspection well structure.

[0007] As a preferred option, a coarse sand layer for the pipe is provided above the medium-coarse sand layer on the outside of the support block. The coarse sand layer for the pipe can further disperse the load transmitted from the pipe body to the soil, prevent the soil outside the support block from settling due to excessive local pressure, thereby ensuring the stability of the installation height of the pipe body, and at the same time, it can also provide positioning support for the bottom of the pipe body.

[0008] As a preferred embodiment, the inner top of the lower well casing is provided with an inverted conical support and sealing recess, and a sealing support mortar layer is provided between the outer wall of the support and sealing recess and the outer wall of the upper well casing. The inverted conical support and sealing recess provides installation positioning for the upper well casing, and the sealing support mortar layer not only fills the gap between the support and sealing recess and the outer wall of the upper well casing to achieve a reliable seal and prevent rainwater or well water from leaking from the connection between the two, but also provides structural support for the upper well casing, enhancing the firmness of the connection between the upper and lower well casings and preventing the upper well casing from loosening after long-term use.

[0009] As a preferred embodiment, the upper part of the sealing and supporting mortar layer forms a conical structure. A gap is provided between the top of the supporting sealing recess and the outer wall of the downhole casing. The top of this gap forms a supporting platform for the outer bottom of the sealing and supporting mortar layer. The supporting platform can effectively support the outer bottom of the sealing and supporting mortar layer, preventing the mortar layer from sagging due to its own weight during solidification, thus improving the sealing performance and structural stability of the connection.

[0010] As a preferred embodiment, the bottom of the cover plate is provided with an installation cone that extends into the inner hole at the top of the upper well pipe, the inner wall of the top of the upper well pipe is conical, and the upper part of the upper well pipe is a variable diameter structure with wellhead contraction.

[0011] As a preferred embodiment, the top of the concrete base is provided with an annular limiting cone supporting the inner hole of the lower well pipe. The space between the upper outer side of the annular limiting cone and the inner wall of the lower well pipe is filled with polyurethane sealant. The annular limiting cone supports and limits the inner hole of the lower well pipe, preventing radial displacement due to external forces and ensuring the relative stability of the lower well pipe and the concrete base. The polyurethane sealant tightly fills the gap between the annular limiting cone and the inner wall of the lower well pipe, forming a reliable seal and preventing water leakage from the connection between the lower well pipe and the concrete base, thus protecting the groundwater and soil environment.

[0012] As a preferred embodiment, the annular limiting cone has a casting guide platform inside. The inner end of the pipe body extends beyond the mounting hole by a certain distance. Both ends of the casting guide platform extend to the bottom of the inner end of the pipe body. The top of the casting guide platform has a guide groove, which is inclined and its two ends are flush with the inner bottom walls of the pipe body on both sides. The inclined guide groove of the casting guide platform can guide the water flowing out of the pipe body to flow smoothly along a fixed path, avoiding the formation of stagnant areas in the well, reducing the accumulation of silt and debris in the well, and reducing the frequency of sludge removal and maintenance costs of the inspection well. The two ends of the casting guide platform extending to the bottom of the inner end of the pipe body can support the bottom of the pipe body and increase stability.

[0013] This utility model has the following beneficial effects: Significantly improved sealing: The pipe body and the downhole pipe adopt a double seal of "sealing ring + polyurethane sealant". The double sealing structure can effectively prevent rainwater and sewage leakage and protect the underground environment.

[0014] The pipe body forms a double-level support through "support block with concrete filling layer + concrete support layer". This not only facilitates the application of polyurethane sealant to the lower part for sealing, but also ensures the support effect of the pipe body at the protruding end, and better prevents breakage caused by settlement. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the main structure of this utility model; Figure 2 This is a schematic diagram of the side structure of the support block; Figure 3 for Figure 1 Enlarged structural diagram at point A; Figure 4 for Figure 1 Enlarged structural diagram at point B; In the diagram: 1. Medium-coarse sand cushion layer; 2. Concrete base; 3. Pipeline coarse sand cushion layer; 4. Concrete filling layer; 5. Support block; 6. Pipeline body; 7. Concrete support layer; 8. Polyurethane sealant one; 9. Lower well pipe; 10. Support sealing recess; 11. Sealing support mortar layer; 12. Upper well pipe; 13. Cover plate; 14. Installation cone; 15. Support platform; 16. Sealing ring; 17. Polyurethane sealant two; 18. Annular limiting cone; 19. Casting guide platform; 20. Support arc groove. Detailed Implementation

[0016] The present invention will be further described below with reference to the embodiments.

[0017] Example 1, as Figures 1 to 4As shown, this utility model is a connection structure for rainwater and sewage inspection wells, including a concrete base 2 set at the bottom of the rainwater and sewage foundation trench. A lower well pipe 9, an upper well pipe 12, and a cover plate 13 are connected sequentially above the concrete base 2. The lower well pipe 9 is provided with an installation hole, and a pipe body 6 is provided in the installation hole. A support block 5 is provided at the bottom of the pipe body 6 outside the lower well pipe 9. A filling cavity is provided in the support block 5. Support arc grooves 20 supporting the bottom of the pipe body 6 are provided on the opposite side walls of the support block 5. A conical sealing hole is provided at the outer end of the installation hole. A sealing ring 16 is provided in the sealing hole and fitted on the pipe body 6. A polyurethane sealant 8 is provided on the outside of the sealing ring 16. A concrete support layer 7 is filled in the gap between the support block 5 and the lower well pipe 9. The concrete support layer 7 covers the lower part of the polyurethane sealant 8. The top of the concrete support layer 7 is flush with the support block 5. A concrete filling layer 4 is provided in the filling cavity of the support block 5.

[0018] During construction, the stormwater and sewage foundation trench is excavated according to the design dimensions. The depth and width of the foundation trench are determined based on the burial depth of the inspection well and the pipe body 6. Reinforcing mesh with Φ12@200 steel bars is tied at the corresponding positions of the inspection well in the stormwater and sewage foundation trench. Then, formwork is erected, and C35 concrete is poured to form the concrete base 2. The lower manhole pipe 9 is hoisted onto the concrete base 2 and installed. A support block 5 is then placed on the outside of the lower manhole pipe 9. The pipe body 6 is then hoisted to the support block 5, with its bottom supported within the support arc groove 20 of the support block 5. The inner end of the pipe body 6 is then ground, and a matching lubricant is applied to the socket and outer wall. A sealing ring 16 is then fitted, and the end of the pipe body 6 is inserted into the installation hole. A ring of polyurethane sealant-8 is then evenly applied to the outside of the sealing hole to seal it. A concrete filling layer 4 is then poured into the filling cavity of the support block 5, and a concrete support layer 7 is poured in the gap between the support block 5 and the lower manhole pipe 9. Finally, the upper manhole pipe 12 and the cover plate 13 are hoisted and installed sequentially.

[0019] In Example 2, based on Example 1, an installation trough is provided at the bottom of the stormwater and sewage foundation trench, with the concrete base 2 situated within it. Both the stormwater and sewage foundation trench and the installation trough have a medium-coarse sand cushion layer 1 at their bottoms. During the excavation of the stormwater and sewage foundation trench, the installation trough is excavated at the bottom corresponding to the manhole location. Then, the medium-coarse sand cushion layer 1 is laid at the bottom of both the stormwater and sewage foundation trench and the installation trough, and compacted. The medium-coarse sand has a mud content ≤3% and a compaction degree ≥92%.

[0020] A coarse sand pad 3 for pipes is provided above the medium-coarse sand pad 1 on the outside of the support block 5. After the support block 5 is placed on the medium-coarse sand pad 1 and the height is determined, the coarse sand pad 3 for pipes is laid on top of the medium-coarse sand pad 1 on the outside of the support block 5 and flattened. Then, when the pipe body 6 is hoisted and installed, the pipe body 6 is pressed into the coarse sand pad 3 for pipes. The coarse sand pad 3 for pipes can support the bottom of the pipe body 6 on the outside of the support block 5.

[0021] The inner side of the top of the lower well casing 9 is provided with an inverted conical support and sealing recess 10, and a sealing support mortar layer 11 is provided between the outer wall of the support and sealing recess 10 and the outer wall of the upper well casing 12.

[0022] The upper part of the sealing support mortar layer 11 forms a conical structure. A gap is provided between the top of the supporting sealing recess 10 and the outer wall of the lower well pipe 9. The top of this gap forms a support platform 15 at the bottom of the outer side of the supporting sealing support mortar layer 11. When the upper well pipe 12 is installed, the bottom of the upper well pipe 12 is inserted into the supporting sealing recess 10 of the lower well pipe 9, and then the sealing support mortar layer 11 is applied between the outer wall of the supporting sealing recess 10 and the outer wall of the upper well pipe 12.

[0023] The bottom of the cover plate 13 is provided with an installation cone 14 that extends into the inner hole at the top of the upper well pipe 12. The inner wall of the top hole of the upper well pipe 12 is conical, and the upper part of the upper well pipe 12 is a variable diameter structure with wellhead contraction.

[0024] The top of the concrete base 2 is provided with an annular limiting cone 18 to support the inner hole of the bottom of the lower well pipe 9. The space between the upper outer side of the annular limiting cone 18 and the inner wall of the lower well pipe 9 is filled with polyurethane sealant 17. During the installation of the lower well pipe 9, the bottom of the lower well pipe 9 is inserted into the annular limiting cone 18, and then polyurethane sealant 17 is evenly applied between the upper outer side of the annular limiting cone 18 and the inner wall of the lower well pipe 9.

[0025] The annular limiting cone 18 has a casting guide platform 19 inside. The inner end of the pipe body 6 extends beyond the installation hole by a certain distance. Both ends of the casting guide platform 19 extend to the bottom of the inner end of the pipe body 6. The top of the casting guide platform 19 has a guide groove, which is inclined. Both ends of the guide groove are flush with the bottom inner wall of the pipe body 6 on both sides. After the pipe bodies 6 on both sides are installed, the guide platform 19 can be cast in place on the top of the annular limiting cone 18, and the guide groove can be smoothed. The guide groove is inclined.

[0026] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0027] In the description of this utility model, the terms "inner", "outer", "longitudinal", "transverse", "upper", "lower", "top", "bottom", 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 utility model and do not require that this utility model must be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

Claims

1. A connection structure for a stormwater and sewage inspection well, comprising a concrete base (2) set at the bottom of a stormwater and sewage trench, wherein a lower well pipe (9), an upper well pipe (12), and a cover plate (13) are sequentially connected above the concrete base (2), and the lower well pipe (9) is provided with an installation hole, and a pipe body (6) is provided in the installation hole, characterized in that: A support block (5) is provided at the bottom of the pipe body (6) outside the downhole pipe (9). A filling cavity is provided inside the support block (5). Support arc grooves (20) supporting the bottom of the pipe body (6) are provided on the opposite side walls of the support block (5). A conical sealing hole is provided at the outer end of the mounting hole. A sealing ring (16) is provided inside the sealing hole and fitted on the pipe body (6). A polyurethane sealant (8) is provided on the outside of the sealing ring (16). A concrete support layer (7) is filled in the gap between the support block (5) and the downhole pipe (9). The concrete support layer (7) covers the lower part of the polyurethane sealant (8). The top of the concrete support layer (7) is flush with the support block (5). A concrete filling layer (4) is provided in the filling cavity of the support block (5).

2. The connection structure for rainwater and sewage inspection wells according to claim 1, characterized in that: The bottom of the stormwater and sewage foundation is provided with an installation trough, and the concrete base (2) is located in the installation trough. Both the stormwater and sewage foundation and the installation trough are provided with a medium-coarse sand cushion layer (1).

3. The connection structure for rainwater and sewage inspection wells according to claim 2, characterized in that: A coarse sand pad (3) is provided above the medium-coarse sand pad (1) on the outside of the support block (5).

4. The connection structure for rainwater and sewage inspection wells according to claim 1, characterized in that: The inner side of the top of the lower well pipe (9) is provided with an inverted conical support and sealing recess (10), and a sealing support mortar layer (11) is provided between the outer wall of the support and sealing recess (10) and the outer wall of the upper well pipe (12).

5. The connection structure for rainwater and sewage inspection wells according to claim 4, characterized in that: The upper part of the sealing support mortar layer (11) forms a conical structure. There is a gap between the top of the supporting sealing recess (10) and the outer wall of the downhole pipe (9). The top of this gap forms the support platform (15) at the bottom of the outer side of the supporting sealing support mortar layer (11).

6. The connection structure for rainwater and sewage inspection wells according to claim 1, characterized in that: The bottom of the cover plate (13) is provided with an installation cone (14) that extends into the inner hole at the top of the upper well pipe (12). The inner wall of the top hole of the upper well pipe (12) is conical, and the upper part of the upper well pipe (12) is a variable diameter structure with wellhead shrinkage.

7. The connection structure for rainwater and sewage inspection wells according to claim 1, characterized in that: The top of the concrete base (2) is provided with an annular limiting cone (18) that supports the bottom inner hole of the lower well pipe (9). The upper outer side of the annular limiting cone (18) and the inner wall of the lower well pipe (9) are filled with polyurethane sealant II (17).

8. The connection structure for rainwater and sewage inspection wells according to claim 7, characterized in that: The annular limiting cone (18) is provided with a casting guide platform (19). The inner end of the pipe body (6) extends beyond the installation hole by a certain distance. The two ends of the casting guide platform (19) extend to the bottom of the inner end of the pipe body (6). The top of the casting guide platform (19) is provided with a guide groove. The guide groove is inclined and the two ends of the guide groove are flush with the bottom inner wall of the pipe body (6) on both sides.

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