Prefabricated inspection shaft

Abstract

The utility model relates to a prefabricated inspection wellbore, and relates to the technical field of inspection wellbores, the prefabricated inspection wellbore comprises a well seat, a middle wellbore and an upper wellbore which are sequentially arranged from bottom to top, the well seat is a cylinder with an upper opening, the middle wellbore and the upper wellbore are vertically through cylinders, and convex rings are arranged on the lower end faces of the middle wellbore and the upper wellbore; annular grooves matched with the protruding rings are formed in the upper end faces of the well base and the middle shaft correspondingly, a plurality of clamping blocks are arranged on the inner walls of the protruding rings, and a plurality of vertical grooves and transverse grooves for the clamping blocks to move are formed in the side walls of the annular grooves. The device has the effect of improving the working efficiency of shaft assembly inspection.

Description

Technical Field

[0001] This application relates to the field of manhole technology, and in particular to a prefabricated manhole. 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 intersections, bends, changes in pipe diameter or slope, and at regular intervals on straight pipe sections to facilitate the periodic inspection of ancillary structures.

[0003] Traditional inspection wells are constructed using on-site formwork casting or brick masonry, which increases construction time, makes it difficult to guarantee construction quality, has a low degree of prefabrication, and increases construction pollution, failing to meet national requirements for green building development. Existing well casings are all prefabricated components, which are then installed inside the well opening.

[0004] However, each section of the well casing is quite heavy, and it is not easy to align and connect the sections coaxially during the installation of the prefabricated well casing, which makes the assembly of each section of the well casing relatively slow and reduces the work efficiency of well casing assembly. Utility Model Content

[0005] To improve the efficiency of manhole assembly, this application provides a prefabricated manhole casing.

[0006] This application provides a prefabricated inspection well casing, which adopts the following technical solution:

[0007] A prefabricated inspection well includes a well base, a middle well tube, and an upper well tube arranged sequentially from bottom to top. The well base is a cylinder with an opening at the top, and the middle well tube and the upper well tube are cylinders that run vertically through each other. The lower end face of both the middle well tube and the upper well tube is provided with a convex ring, and the upper end face of both the well base and the middle well tube is provided with an annular groove adapted to the convex ring. The inner wall of the convex ring is provided with a number of locking blocks, and the side wall of the annular groove is provided with a number of vertical grooves and horizontal grooves for moving the locking blocks.

[0008] By adopting the above technical solution, the upper shaft and the middle shaft, as well as the middle shaft and the shaft base, are tightly connected through the cooperation of the convex ring and the ring groove, which effectively avoids horizontal misalignment. At the same time, the convex ring drives the convex block to enter the horizontal groove along the vertical groove, and then the convex ring is rotated to make the convex block move along the horizontal groove, which can restrict the convex ring from leaving the ring groove in the vertical direction, thereby improving the stability of the shaft and the installation efficiency.

[0009] Optionally, several fixing rods are inserted vertically into the inner side wall of the well base, with the end of the fixing rod away from the well base passing through the middle well cylinder and the upper well cylinder in sequence.

[0010] By adopting the above technical solution, the well base, intermediate well cylinder and upper well cylinder are rotated in sequence in the vertical direction and stacked together. Then, a fixing rod is used to connect the three together, making the connection between the well base, intermediate well cylinder and upper well cylinder more stable and further enhancing the overall stability.

[0011] Optionally, the outer walls of the well base, the intermediate well shaft, and the upper well shaft are uniformly provided with several support rods along the circumference.

[0012] By adopting the above technical solution, the support rod increases the contact area between the well casing and the soil, effectively improving the stability of the well casing and preventing it from tilting or moving.

[0013] Optionally, a vertically downward extending stop bar is fixed at the end of the support rod away from the well seat.

[0014] By adopting the above technical solution, hooks can be suspended on the support rod to hoist various components of the well shaft. The stop rod can prevent hooks and other objects from falling off the support rod during hoisting and construction, thus enhancing the convenience and safety of construction.

[0015] Optionally, the inner diameter of the upper wellbore is smaller than the inner diameter of the intermediate wellbore.

[0016] By adopting the above technical solution, the shrinkage design of the upper well casing can reduce the risk of rainwater backflow and protect the inside of the well casing from the influence of external water pressure.

[0017] Optionally, the upper end face of the upper wellbore is provided with a guide ring, and a well ring is sleeved between the outer wall of the guide ring and the fixing rod. The inner wall of the well ring abuts against the outer wall of the guide ring, the lower end face of the well ring abuts against the upper end face of the upper wellbore, and the upper end face of the guide ring is below the upper end face of the well ring.

[0018] By adopting the above technical solutions, the design of the guide ring and well ring makes the installation of the well cover faster and more accurate, thus improving construction efficiency.

[0019] Optionally, the intermediate wellbore may be provided in several parts.

[0020] By adopting the above technical solution, the number of intermediate wells can be flexibly adjusted according to actual needs to meet the installation requirements of different heights and improve the applicability of the wells.

[0021] Optionally, the side wall of the well base is provided with several through holes that connect the inside and outside of the well base.

[0022] By adopting the above technical solution, through holes are used to connect pipes in different directions, ensuring that water can flow smoothly from one pipe to another, thus achieving the connectivity of the drainage system.

[0023] In summary, this application includes at least one of the following beneficial technical effects:

[0024] 1. The upper shaft and the intermediate shaft, as well as the intermediate shaft and the shaft base, are tightly connected by the fit of the convex ring and the annular groove, which effectively avoids horizontal misalignment. At the same time, the convex ring drives the convex block to enter the horizontal groove along the vertical groove. Then, by rotating the convex ring, the convex block moves along the horizontal groove, which can limit the convex ring from leaving the annular groove in the vertical direction, thus improving the stability of the shaft and the installation efficiency.

[0025] 2. The well base, intermediate well cylinder, and upper well cylinder are rotated vertically in sequence and stacked together. Then, a fixing rod is used to connect the three together, making the connection between the well base, intermediate well cylinder, and upper well cylinder more stable and further enhancing the overall stability.

[0026] 3. The support rods increase the contact area between the well casing and the soil, effectively improving the stability of the well casing and preventing it from tilting or moving. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of a prefabricated inspection well.

[0028] Figure 2 This is a cross-sectional schematic diagram of the overall structure of a prefabricated inspection well.

[0029] Figure 3 This is a structural diagram of the upper shaft.

[0030] Figure 4 This is a structural diagram of the intermediate shaft.

[0031] Figure 5 This is a schematic diagram of a structure with two intermediate shafts installed.

[0032] Explanation of reference numerals in the attached drawings: 1. Well base; 11. Fixing rod; 12. Support rod; 121. Stop rod; 13. Through hole; 2. Intermediate well shaft; 3. Upper well shaft; 31. Guide ring; 4. Protruding ring; 41. Locking block; 5. Annular groove; 51. Vertical groove; 52. Horizontal groove; 6. Well ring. Detailed Implementation

[0033] The present application will be further described in detail below with reference to all the accompanying drawings.

[0034] This application discloses a prefabricated inspection well casing.

[0035] Reference Figure 1 A prefabricated inspection well includes a well base 1, an intermediate well 2, and an upper well 3 arranged sequentially from bottom to top.

[0036] Reference Figure 2The well base 1 is a cylindrical tube with an opening at the top. Several through holes 13 are provided on the side wall at the lower end of the well base 1, connecting the inside and outside of the well base 1. The design of these through holes 13 is mainly to connect pipes in different directions, ensuring that water can flow smoothly from one pipe to another, thereby realizing the connectivity of the drainage system.

[0037] Reference Figure 2 and Figure 3 The upper shaft 3 is a cylindrical tube that runs through the top and bottom. A convex ring 4 coaxial with the upper shaft 3 is fixed on the lower end face of the upper shaft 3. Several locking blocks 41 are fixed on the inner wall of the convex ring 4. The convex ring 4, the locking blocks 41 and the upper shaft 3 are integrally formed.

[0038] Reference Figure 2 and Figure 4 The intermediate shaft 2 is also a cylindrical tube that runs through the top and bottom. A protruding ring 4 is also fixed on the lower end face of the intermediate shaft 2. The intermediate shaft 2 and the protruding ring 4 and the locking block 41 on the intermediate shaft 2 are integrally formed.

[0039] Reference Figure 4 The upper end faces of the well base 1 and the intermediate well cylinder 2 are provided with annular grooves 5, and the side walls of the annular grooves 5 are provided with several vertical grooves 51 and horizontal grooves 52, which are connected.

[0040] Reference Figure 1 The outer walls of the well base 1, the intermediate well shaft 2, and the upper well shaft 3 are all uniformly equipped with several support rods 12 along the circumference. These support rods 12 increase the contact area between the well shaft and the surrounding soil, effectively improving the stability of the well shaft and preventing it from tilting or moving. Furthermore, each support rod 12 has a vertically extending stop 121 fixedly installed at the end away from the well base 1. This design not only allows for the suspension of hooks on the support rods 12 for convenient hoisting of various components of the well shaft, but also effectively prevents hooks and other objects from falling off the support rods 12 during hoisting and construction, thereby greatly enhancing the convenience and safety of construction.

[0041] Reference Figure 1Before installing the well casing, excavation is carried out using equipment such as excavators according to the design drawings to form a well casing foundation pit. The size of the foundation pit must meet the requirements of the well casing installation. The bottom of the foundation pit needs to be leveled and compacted, and a sand and gravel cushion layer is laid to ensure the stability of the foundation and drainage performance. During the installation process, the hook is hooked onto the support rod 12, and the well base 1 is first installed on the foundation pit base using hoisting equipment; then, the hoisting equipment is used to lift the intermediate well casing 2 and stack it on top of the well base 1, or to stack the upper well casing 3 on the intermediate well casing 2. First, the convex ring 4 is aligned with the annular groove 5, and the convex ring 4 is inserted into the annular groove 5. At this time, the convex ring 4 drives the convex block to enter the transverse groove 52 along the vertical groove 51. The hoisting equipment uses pulling force to offset the pressure of the upper well casing component on the lower well casing component, making it easier to rotate the upper well casing component. At this time, rotating the convex ring 4 causes the convex block to move along the transverse groove 52, which can restrict the convex ring 4 from leaving the annular groove 5 in the vertical direction, improving the stability of the well casing and the installation efficiency.

[0042] Reference Figure 1 In addition, fixing rods 11 are vertically inserted into the side wall of the well base 1. These fixing rods 11, starting from the well base 1, pass sequentially through the intermediate well cylinder 2 and the upper well cylinder 3 at the end furthest from the well base 1. This design allows the well base 1, intermediate well cylinder 2, and upper well cylinder 3 to be tightly connected together when rotated and stacked vertically. This connection method makes the connection between the well base 1, intermediate well cylinder 2, and upper well cylinder 3 more stable, thereby further enhancing the overall stability. The upper end of the fixing rod 11 can be positioned above the upper well cylinder 3, increasing the contact area between the fixing rod 11 and the soil during backfilling, thus improving stability.

[0043] Reference Figure 2 A guide ring 31 is specially provided on the upper end face of the upper well casing 3. A well ring 6 is fitted between the outer wall of the guide ring 31 and the fixing rod 11, and the inner wall of the well ring 6 is in close contact with the outer wall of the guide ring 31. During installation, the well ring 6 moves downward along the outer wall of the guide ring 31 until the lower end face of the well ring 6 abuts against the upper end face of the upper well casing 3. At this time, the upper end face of the guide ring 31 is located below the upper end face of the well ring 6, and the height difference between the two is left for the installation of the well cover. This design structure makes the installation of the well cover faster and more accurate, thereby greatly improving the construction efficiency. At the same time, when backfilling the surrounding area after installation, the outer wall of the well ring 6 and the upper end face of the upper well casing 3 are backfilled together, enhancing stability.

[0044] Reference Figure 2 The design of the well casing also takes into account the actual drainage needs. In particular, the inner diameter of the upper well casing 3 is designed to be smaller than the inner diameter of the middle well casing 2. This contraction design can effectively reduce the risk of rainwater backflow, thereby protecting the inside of the well casing from the influence of external water pressure.

[0045] Reference Figure 5Meanwhile, in order to meet the installation requirements of different heights, the intermediate shaft 2 is designed to be flexibly adjustable in number, so that the number of intermediate shaft 2 can be increased or decreased as needed, thereby greatly improving the applicability of the shaft.

[0046] The implementation principle of a prefabricated inspection well in this application embodiment is as follows: the upper well 3 and the middle well 2, and the middle well 2 and the well base 1 are all tightly connected by the cooperation of the convex ring 4 and the annular groove 5, which effectively avoids the horizontal misalignment phenomenon. At the same time, the convex ring 4 drives the convex block to enter the horizontal groove 52 along the vertical groove 51. Then, the convex ring 4 is rotated so that the convex block moves along the horizontal groove 52, which can restrict the convex ring 4 from leaving the annular groove 5 in the vertical direction, thereby improving the stability and installation efficiency of the well.

[0047] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A prefabricated manhole casing, comprising a manhole base (1), an intermediate manhole casing (2), and an upper manhole casing (3) arranged sequentially from bottom to top, characterized in that: The well base (1) is a cylinder with an opening at the top. The middle well cylinder (2) and the upper well cylinder (3) are cylinders that run through the top and bottom. The lower end face of both the middle well cylinder (2) and the upper well cylinder (3) is provided with a convex ring (4). The upper end face of both the well base (1) and the middle well cylinder (2) is provided with an annular groove (5) that matches the convex ring (4). The inner wall of the convex ring (4) is provided with several locking blocks (41). The side wall of the annular groove (5) is provided with several vertical grooves (51) and horizontal grooves (52) for moving the locking blocks (41).

2. A prefabricated inspection well casing according to claim 1, characterized in that: Several fixing rods (11) are inserted vertically into the side wall of the well base (1). The end of the fixing rod (11) away from the well base (1) passes through the middle well cylinder (2) and the upper well cylinder (3) in sequence.

3. A prefabricated inspection well casing according to claim 1, characterized in that: The outer walls of the well base (1), the intermediate well cylinder (2) and the upper well cylinder (3) are uniformly provided with several support rods (12) along the circumference.

4. A prefabricated inspection well casing according to claim 3, characterized in that: The end of the support rod (12) away from the well seat (1) is fixed with a vertically downward extending stop (121).

5. A prefabricated inspection well casing according to claim 1, characterized in that: The inner diameter of the upper wellbore (3) is smaller than the inner diameter of the middle wellbore (2).

6. A prefabricated inspection well casing according to claim 2, characterized in that: The upper end face of the upper wellbore (3) is provided with a guide ring (31), and a well ring (6) is sleeved between the outer wall of the guide ring (31) and the fixing rod (11). The inner wall of the well ring (6) abuts against the outer wall of the guide ring (31), the lower end face of the well ring (6) abuts against the upper end face of the upper wellbore (3), and the upper end face of the guide ring (31) is below the upper end face of the well ring (6).

7. A prefabricated inspection well casing according to claim 1, characterized in that: The intermediate wellbore (2) is provided in several parts.

8. A prefabricated inspection well casing according to claim 1, characterized in that: The well seat (1) has several through holes (13) on its side wall that connect the inside and outside of the well seat (1).

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