Anti-backflow inspection well

Abstract

The utility model relates to an anti-backflow inspection well which comprises a well shaft and further comprises a well cover, a well cover seat, a pressure bearing ring, plain concrete and a well seat, the well cover seat, the well shaft, the pressure bearing ring, the plain concrete and the well seat are sequentially arranged from top to bottom, a well chamber is formed inside the well cover seat, the lower portion of the plain concrete is arranged on the periphery of the upper end of the well seat, and a slow expansion water stop strip is arranged between the well seat. A circle of clamping groove with an L-shaped section is downwards formed in the upper end of the well lid base, and the well lid is clamped in the clamping groove. The well cover seat, the shaft, the pressure-bearing ring, the plain concrete, the well seat and the like are sequentially arranged, during actual use, the surface of a wetland is located on the lower middle portion of the shaft, namely the upper portion of the shaft, the well cover seat and the well cover are all located above the surface of the wetland, and the situation that surface water flows backwards is avoided. And secondly, the surface of the shaft is plastered, and surface water can be prevented from seeping into the inspection well through the arrangement of pressure-bearing ring seat mortar installation, triangular mortar smearing and slow expansion water stop strips, so that the inspection well has a good waterproof function.

Description

Technical Field

[0001] This utility model relates to the field of water pipe sewage technology, specifically to an anti-backflow inspection well. Background Technology

[0002] Inspection wells are installed to facilitate the maintenance and installation of underground infrastructure such as power supply, water supply, drainage, sewage, communications, cable TV, gas pipes, and street light lines in cities. They are generally located at pipe junctions, bends, changes in pipe diameter or slope, and at regular intervals along straight pipe sections to facilitate periodic inspections of ancillary structures. Due to their high ecological value, wetlands and lakeshores are often developed into ecological landscapes for sightseeing and tourism. During the construction of wetland ecological landscapes, there is often a need to install underground pipelines to supply power, water supply, drainage, and sewage for the technical facilities of the wetland landscape; therefore, the installation of inspection wells within wetlands is also necessary.

[0003] To ensure smooth traffic flow, manholes in urban areas are generally level with the road. However, in wetlands, where there is surface water, manholes located in wetlands need to be raised to prevent surface water from entering the pipes. They must be 0.5m above the surface water level. Additionally, waterproofing measures must be taken to prevent water from seeping into the manholes. Utility Model Content

[0004] This utility model provides an anti-backflow inspection well for wetlands to prevent surface water from backflowing or seeping into the inspection well.

[0005] To achieve the above objectives, the technical solution of this utility model is as follows: A backflow prevention inspection well is provided, including a well shaft. Its innovation lies in that it further includes a well cover, a well cover seat, a pressure-bearing ring, plain concrete, and a well base. The well cover seat, well shaft, pressure-bearing ring, plain concrete, and well base are arranged sequentially from top to bottom, forming a well chamber inside. The upper part of the well base, the well cover seat, the well shaft, and the pressure-bearing ring have the same inner diameter. The lower part of the plain concrete is located around the upper end of the well base, and a slow-expansion water-stop strip is provided between the well bases. The upper end of the well cover seat has a downward-facing L-shaped groove, and the well cover is fitted into the groove.

[0006] Furthermore, it also includes a crushed stone cushion layer, which is placed below the plain concrete and has the same thickness as the plain concrete.

[0007] Furthermore, the bearing ring is installed on top of the plain concrete with mortar, and a triangular plaster is applied between the outer perimeter of the bearing ring and the plain concrete. The mortar and the triangular plaster are made of 1:2 waterproof cement mortar.

[0008] Furthermore, the manhole cover seat is a reinforced concrete manhole cover seat, and the manhole cylinder is a brick manhole cylinder with an inner diameter of 700mm.

[0009] Furthermore, both the inner and outer sides of the well casing are plastered with 1:2 waterproof cement mortar, with the inner side of the well casing having a plaster thickness of 20mm and the outer side having a plaster thickness of 10mm.

[0010] Furthermore, the cross-sectional size of the slow-expansion waterstop strip is 30x40mm.

[0011] Furthermore, the strength grade of the plain concrete is C15.

[0012] Furthermore, it also includes a protective net, in which several stainless steel hooks are evenly embedded along the circumference inside the plain concrete, with the ends of the hooks placed inside the well chamber, and the protective net is connected to each stainless steel hook.

[0013] Furthermore, it also includes a foundation pad, the well base is cross-shaped, with water pipes connected to the two horizontal ends, and the foundation pad is located at the bottom of the well base.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] (1) The anti-backflow inspection well of this utility model is arranged in sequence with a well cover seat, well cylinder, pressure ring, plain concrete and well seat. In actual use, the wetland surface is in the middle and lower part of the well cylinder, that is, the upper part of the well cylinder and the well cover seat are above the wetland surface, so there will be no backflow of surface water. In addition, the surface of the well cylinder, the installation of the pressure ring seat grout, the application of triangular mortar, and the setting of the slow expansion water-stop strip can all prevent surface water from seeping into the inspection well. The inspection well of this utility model has a very good waterproof function.

[0016] (2) The anti-backflow inspection well of this utility model is provided with a crushed stone cushion layer and a foundation cushion layer, which can replace the weak soil layer in the wetland, improve the bearing capacity and stability of the foundation, and the crushed stone cushion layer has good permeability, effectively preventing water accumulation.

[0017] (3) The anti-backflow inspection well of this utility model is equipped with a protective net. Since the inspection well of this utility model is equipped with a pressure ring, plain concrete, crushed stone cushion layer, etc., its height is higher than that of ordinary inspection wells. The setting of the protective net can buffer the fall of personnel when they enter the inspection well, avoid direct fall and injury due to excessive height, and increase the safety factor. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the cross-sectional structure of an anti-backflow inspection well according to the present invention.

[0020] Figure 2 This is a cross-sectional view of a stainless steel hook pre-embedded in the pressure ring of an anti-backflow inspection well according to the present invention.

[0021] Among them, 1-well shaft, 2-well cover, 3-well cover seat, 4-pressure bearing ring, 5-plain concrete, 6-well seat, 7-well chamber, 8-slow expansion waterstop strip, 9-slot, 10-crushed stone cushion layer, 11-grouting, 12-plastering triangular mortar, 13-plastering, 14-protective net, 15-stainless steel hook, 16-foundation cushion layer, 17-water pipe. Detailed Implementation

[0022] The technical solution of this utility model will be clearly and completely described below through specific embodiments.

[0023] This utility model provides an anti-backflow inspection well, including a well casing 1, the specific structure of which is as follows: Figure 1 As shown in the cross-sectional view, the structure also includes a manhole cover 2, a manhole cover seat 3, a pressure ring 4, plain concrete 5, and a manhole base 6. The manhole cover seat 3, manhole casing 4, pressure ring 4, plain concrete 5, and manhole base 6 are arranged sequentially from top to bottom, forming a manhole chamber 7 inside. The upper part of the manhole base 6, the manhole cover seat 3, the manhole casing 1, and the pressure ring 4 have the same inner diameter. The lower part of the plain concrete 5 is located around the upper end of the manhole base 6, and a slow-expansion water-stop strip 8 is provided between the manhole bases 6. Preferably, the cross-sectional size of the slow-expansion water-stop strip 8 is 30x40mm. The slow-expansion water-stop strip 8 can seal the connection between the upper part of the manhole base 6 and the plain concrete 5, preventing surface water from seeping into the manhole chamber 7. The upper end of the manhole cover seat 3 has a downward-facing L-shaped groove 9. The manhole cover 2 is inserted into the groove 9. To open or close the manhole cover 2, simply move the manhole cover 2 upwards to open it or downwards to insert it into the groove 9.

[0024] Figure 1 The dashed lines in the text represent the wetland surface.

[0025] This utility model also includes a crushed stone cushion layer 10, which is disposed below the plain concrete 5 and has the same thickness as the plain concrete 5. The crushed stone cushion layer 10 can replace the weak soil layer in the wetland, improve the bearing capacity and stability of the foundation, and at the same time, the crushed stone cushion layer has good permeability, effectively preventing water accumulation.

[0026] The bearing ring is installed on top of the plain concrete with grout 11, and a triangular plaster 12 is applied between the outer perimeter of the bearing ring and the plain concrete. The grout and triangular plaster are made of 1:2 waterproof cement mortar. The grout and triangular plaster sealing of the bearing ring and plain concrete prevents surface water from seeping into the well chamber in wet areas.

[0027] Preferably, the manhole cover seat of this utility model is a reinforced concrete manhole cover seat, the manhole cylinder is a brick manhole cylinder, and the inner diameter of the manhole cylinder is 700mm.

[0028] Both the inner and outer sides of the well casing are coated with 1:2 waterproof cement mortar 13. The thickness of the coating 13 on the inner side of the well casing is 20mm, and the thickness of the coating 13 on the outer side of the well casing is 10mm. Preferably, the lower end of the coating 13 on the inner side of the well casing extends to the position of the pressure ring. The cement mortar coating also seals the connection between the well casing 1 and the pressure ring 4 to prevent surface water from seeping in.

[0029] Preferably, the strength grade of plain concrete 5 is C15.

[0030] This utility model also includes a protective net 14, and several stainless steel hooks 15 are evenly embedded along the circumference inside the plain concrete 5, such as... Figure 2 As shown, in this embodiment, eight stainless steel hooks 1 are pre-embedded, with the hook ends placed inside the well chamber 7. A protective net 14 is connected to each stainless steel hook 15. Because the inspection well of this invention is higher than the wetland surface, its overall height is greater than that of a typical inspection well. Maintenance personnel entering the well chamber may be injured by accident due to the excessive height of the inspection well. The protective net buffers the entry of personnel, increasing the safety factor.

[0031] Preferably, this utility model also includes a foundation pad 16, and the well base 6 is cross-shaped, with water pipes 17 connected to the two horizontal ends. The foundation pad 16 is located at the bottom of the well base 6. The foundation pad can also replace the weak soil layer in the wetland, improve the bearing capacity and stability of the foundation, and also level the ground to ensure the overall stability of the inspection well.

[0032] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the concept and scope of the present utility model. Without departing from the design concept of the present utility model, all modifications and improvements made by those skilled in the art to the technical solutions of the present utility model should fall within the protection scope of the present utility model. The technical content for which protection is sought in the present utility model has been fully recorded in the technical requirements.

Claims

1. A backflow prevention inspection well, comprising a well casing, characterized in that: It also includes a manhole cover, a manhole cover base, a pressure-bearing ring, plain concrete, and a manhole base. The manhole cover base, manhole casing, pressure-bearing ring, plain concrete, and manhole base are arranged sequentially from top to bottom, forming a manhole chamber inside. The upper part of the manhole base, the manhole cover base, the manhole casing, and the pressure-bearing ring have the same inner diameter. The lower part of the plain concrete is located on the outer periphery of the upper end of the manhole base, and a slow-expansion water-stop strip is provided between the manhole bases. The upper end of the manhole cover base has a groove with an L-shaped cross section, and the manhole cover is fitted into the groove.

2. The anti-backflow inspection well according to claim 1, characterized in that: It also includes a crushed stone cushion layer, which is placed below the plain concrete and has the same thickness as the plain concrete.

3. The anti-backflow inspection well according to claim 1, characterized in that: The pressure ring is installed on top of plain concrete with mortar, and the area between the pressure ring and the plain concrete is filled with triangular plaster. The mortar and the triangular plaster are made of 1:2 waterproof cement mortar.

4. The anti-backflow inspection well according to claim 1, characterized in that: The manhole cover is a reinforced concrete manhole cover, and the manhole cylinder is a brick manhole cylinder with an inner diameter of 700mm.

5. A backflow prevention inspection well according to claim 4, characterized in that: The inner and outer sides of the well casing are plastered with 1:2 waterproof cement mortar. The thickness of the plaster on the inner side of the well casing is 20mm, and the thickness of the plaster on the outer side of the well casing is 10mm.

6. The anti-backflow inspection well according to claim 1, characterized in that: The cross-sectional size of the slow-expansion waterstop strip is 30x40mm.

7. The anti-backflow inspection well according to claim 1, characterized in that: The strength grade of the plain concrete is C15.

8. A backflow prevention inspection well according to claim 1, characterized in that: It also includes a protective net, in which several stainless steel hooks are evenly embedded along the circumference inside the plain concrete, with the ends of the hooks placed inside the well chamber, and the protective net is connected to each stainless steel hook.

9. A backflow prevention inspection well according to claim 1, characterized in that: It also includes a foundation pad, the well base is cross-shaped, with water pipes connected to the two horizontal ends, and the foundation pad is located at the bottom of the well base.

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