A sectional assembled precast concrete inspection well

Abstract

This utility model discloses a segmented, precast concrete inspection well, relating to the field of assembled inspection well technology. It includes an upper well body, trapezoidal tenons, trapezoidal mortises, and a first rubber ring. A first annular groove is provided at the top of the outer wall of the upper well body, and trapezoidal tenons are provided at the four corners of the bottom of the outer wall of the upper well body. The outer wall of the trapezoidal tenon and the inner wall of the trapezoidal mortise interlock. The trapezoidal mortises are provided at the four corners of the top of the outer wall of the lower well body, and a second annular groove is provided at the top of the outer wall of the lower well body, with the first rubber ring disposed in the second annular groove. This utility model, by installing trapezoidal tenons, trapezoidal mortises, second bolts, and sealing rings, achieves rigid fastening and elastic sealing between the upper and lower well bodies, significantly improving the structural stability and long-term watertightness of the segmented connection of the well body. Fixing and sealing can be quickly completed without complex grouting procedures during installation.

Description

Technical Field

[0001] This utility model relates to the field of assembled inspection well technology, specifically a segmented assembled precast concrete inspection well. Background Technology

[0002] In infrastructure projects such as municipal drainage and underground pipe networks, inspection wells serve as important nodes in the pipeline system, undertaking key functions such as inspection, dredging, and connection. Traditional inspection wells are mostly constructed by on-site concrete pouring, which requires formwork, steel reinforcement binding, pouring, vibration, and curing. This results in problems such as long construction period, large on-site workload, and significant weather influence. Moreover, the concrete quality is prone to defects such as honeycomb and pitting due to differences in manual operation, leading to a high risk of leakage later.

[0003] The existing defects are that the connection of inspection well components mostly relies on grouting or single bolt fixing, resulting in low positioning accuracy and easy gaps due to installation deviation. In addition, the grouting has a long curing time, which affects construction efficiency. The seals mostly use ordinary rubber gaskets, which are prone to leakage due to settlement or aging of the seals after long-term use. Furthermore, the ladder inside the well lacks an auxiliary positioning structure, which concentrates the stress and is prone to loosening, posing a safety hazard. Moreover, the connection between the ladder and the well body is not strong enough, and concrete cracking may occur after long-term load-bearing. Utility Model Content

[0004] The purpose of this invention is to provide a segmented, assembled precast concrete inspection well to solve the problems of low construction efficiency, high leakage risk, and insufficient safety performance mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a segmented precast concrete inspection well, comprising an upper well body, a trapezoidal tenon, a trapezoidal mortise, and a first rubber ring. The top of the outer wall of the upper well body is provided with a first annular groove, and the four corners of the bottom of the outer wall of the upper well body are provided with trapezoidal tenons. The top to the middle of the trapezoidal tenon is a rectangular block, and the middle to the bottom of the trapezoidal tenon is an inverted trapezoidal block. The outer wall of the trapezoidal tenon and the inner wall of the trapezoidal mortise are interlocked. The top to the middle of the trapezoidal mortise is a rectangular space, and the middle to the bottom of the trapezoidal mortise is an inverted trapezoidal space. The trapezoidal mortise is provided at the four corners of the top of the outer wall of the lower well body, and the top of the outer wall of the lower well body is provided with a second annular groove, in which the first rubber ring is provided.

[0006] Preferably, the trapezoidal tenon is provided with a second screw hole, which passes through both sides of the trapezoidal tenon. Two fourth screw holes are provided on the front and rear sides of the outer wall of the lower well body. When the trapezoidal tenon and the trapezoidal mortise are fitted together, the second screw hole and the fourth screw hole are concentrically aligned. The second bolt passes through the second screw hole and the fourth screw hole to connect and fix the upper well body and the lower well body.

[0007] Preferably, a steel ring is installed in the first annular groove, the inner wall of the first annular groove and the outer wall of the steel ring are interlocked, and a third screw hole is provided on the side of the outer wall of the steel ring, the third screw hole penetrating both sides of the outer wall of the steel ring.

[0008] Preferably, the upper wellbore is provided with an upper well cavity, the top of the inner wall of the upper well cavity is provided with a first screw hole, the first screw hole and the third screw hole are concentrically aligned, and a connecting groove is provided in the middle of the inner wall of the upper well cavity.

[0009] Preferably, a ladder is provided inside the upper well cavity, and a fixing hole is provided on the front side of the outer wall of the ladder. The fixing hole is concentrically aligned with the first screw hole in the upper well cavity and the third screw hole in the steel ring. The first bolt passes through the fixing hole, the first screw hole and the third screw hole to fix the ladder in the upper well cavity. A climbing rod is provided on the ladder.

[0010] Preferably, a connecting rod is provided on the rear side of the outer wall of the ladder, and the connecting rod is engaged with the connecting groove on the inner wall of the upper well cavity.

[0011] Preferably, the lower wellbore is provided with a lower well cavity, and an inlet is provided on the front side of the outer wall of the lower wellbore, the inlet penetrating the side wall of the lower wellbore and connecting to the lower well cavity inside. A first groove is provided on the inner wall of the inlet, and a second rubber ring is installed in the first groove. An outlet is provided on the rear side of the outer wall of the lower wellbore, the outlet penetrating the side wall of the lower wellbore and connecting to the lower well cavity inside. A second groove is provided on the inner wall of the outlet, and a third rubber ring is installed in the second groove.

[0012] Compared with the prior art, the beneficial effects of this utility model are: 1. This utility model achieves rigid fastening and elastic sealing between the upper and lower well bodies by installing trapezoidal tenons, trapezoidal mortises, second bolts and sealing rings, which greatly improves the structural stability and long-term water tightness of the segmented connection of the well body. During installation, no complicated grouting process is required to quickly complete the fixing and sealing, which solves the problem that the existing inspection well segmented connection is prone to loosening and leakage due to positioning deviation. 2. This utility model achieves double fixation between the ladder and the upper well body by installing a steel ring, a ladder, and a first bolt. The tightening of the bolt and the engagement of the connecting rod ensure that the ladder is fixed and does not shift. The steel ring enhances the structural strength of the connection part, ensuring the firmness and safety of the ladder installation, avoiding the risk of the ladder shaking or falling off during maintenance, and solving the problems of traditional ladders being fixed at only one point and easily loosening due to uneven force. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the unfolded structure of the upper and lower wellbore of this utility model; Figure 3This is a schematic diagram of the unfolded structure of the upper well body and climbing ladder of this utility model; Figure 4 This is a schematic diagram of the upper wellbore structure of this utility model; Figure 5 This is a schematic diagram of the lower wellbore and rubber ring unfolding structure of this utility model.

[0014] In the diagram: 1. Upper wellbore; 2. Lower wellbore; 3. First annular groove; 4. First screw hole; 5. Connecting groove; 6. Trapezoidal tenon; 7. Second screw hole; 8. Connecting rod; 9. Ladder; 10. Climbing rod; 11. Fixing hole; 12. First bolt; 13. Steel ring; 14. Third screw hole; 15. Trapezoidal mortise; 16. Fourth screw hole; 17. Second annular groove; 18. First rubber ring; 19. Upper well cavity; 20. Inlet pipe; 21. First groove; 22. Outlet pipe; 23. Second groove; 24. Second rubber ring; 25. Third rubber ring; 26. Second bolt; 27. Lower well cavity. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model 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 limitations on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0017] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0018] Please see Figure 1 ,Figure 3 and Figure 4 This utility model provides one embodiment: a segmented, assembled precast concrete inspection well, wherein a ladder 9 is installed in the upper well cavity 19, the fixing hole 11 on the ladder 9 is concentrically aligned with the first screw hole 4 in the upper well cavity 19 and the third screw hole 14 in the steel ring 13, the first bolt 12 passes through the fixing hole 11, the first screw hole 4 and the third screw hole 14 to fix the ladder 9 in the upper well cavity 19, and the connecting rod 8 provided on the rear side of the outer wall of the ladder 9 is engaged with the connecting groove 5 on the inner wall of the upper well cavity 19. Furthermore, when assembling the inspection well, the operator first places the steel ring 13 in the first annular groove 3, so that the outer side of the steel ring 13 and the inner wall of the first annular groove 3 fit together. Then, the operator rotates the steel ring 13 in the first annular groove 3, so that the third screw hole 14 in the steel ring 13 and the first screw hole 4 in the upper well cavity 19 are aligned with each other. Then, the connecting rod 8 on the rear side of the ladder 9 is placed in the connecting groove 5 on the inner wall of the upper well cavity 19. Then, the operator aligns the fixing hole 11 on the front side of the top of the ladder 9 with the third screw hole 14 and the first screw hole 4. Finally, the first bolt 12 is inserted into the fixing hole 11, the third screw hole 14 and the first screw hole 4 to firmly fix the ladder 9, the upper well body 1 and the steel ring 13 together.

[0019] Please see Figure 1 and Figure 5 This utility model provides an embodiment of a segmented, assembled precast concrete inspection well. The top of the outer wall of the lower well body 2 is provided with a second annular groove 17, in which a first rubber ring 18 is disposed. An inlet 20 is provided on the front side of the outer wall of the lower well body 2, and a first groove 21 is provided on the inner wall of the inlet 20. A second rubber ring 24 is installed in the first groove 21. An outlet 22 is provided on the rear side of the outer wall of the lower well body 2, and a second groove 23 is provided on the inner wall of the outlet 22. A third rubber ring 25 is installed in the second groove 23. Furthermore, when the operator installs the lower wellbore 2, the first rubber ring 18 is placed in the second annular groove 17, so that the outer wall of the first rubber ring 18 and the inner wall of the second annular groove 17 fit together. The first rubber ring 18 expands when it comes into contact with water. It is made of natural rubber as the base material and contains hydrophilic polymer swelling components such as polyacrylamide and sodium carboxymethyl cellulose. The hydrophilic polymer material will swell when it comes into contact with water. The molecular chains are combined with water molecules through hydrogen bonds, absorb water and stretch, causing the volume of the first rubber ring 18 to expand. At the same time, the elastic skeleton of the rubber substrate will limit excessive expansion, ensuring that the expansion tightly fills the connection gap and achieves sealing and water stop. Then, the operator places the second rubber ring 24 in the first groove 21 in the inlet 20, so that the outer wall of the second rubber ring 24 fits against the inner wall of the first groove 21. The material of the second rubber ring 24 is the same as that of the first rubber ring 18. When leakage occurs, the second rubber ring 24 expands when it comes into contact with water to fill the gap. Then, the third rubber ring 25 is placed in the second groove 23 in the outlet 22, so that the outer wall of the third rubber ring 25 fits tightly against the inner wall of the second groove 23. Finally, the water inlet pipe is connected to the inlet 20, and the outer wall of the water inlet pipe is in contact with the outer wall of the second rubber ring 24. The water outlet pipe is connected to the outlet 22, and the water outlet pipe is in contact with the third rubber ring 25.

[0020] Please see Figure 1 , Figure 2 and Figure 5 This utility model provides an embodiment of a segmented, precast concrete inspection well. The upper well body 1 has four trapezoidal tenons 6 at the bottom corners of its outer wall. The outer walls of the trapezoidal tenons 6 and the inner walls of the trapezoidal mortises 15 are interlocked. The trapezoidal mortises 15 are located at the four corners of the top of the lower well body 2's outer wall. A first rubber ring 18 is provided in a second annular groove 17. A second screw hole 7 is provided on the trapezoidal tenon 6. Two fourth screw holes 16 are provided on the front and rear sides of the lower well body 2's outer wall. When the trapezoidal tenons 6 and the trapezoidal mortises 15 are interlocked, the second screw holes 7 and the fourth screw holes 16 are concentrically aligned. A second bolt 26 passes through the second screw holes 7 and the fourth screw holes 16, tightly connecting the upper well body 1 and the lower well body 2 together. Next, the operator lifts the assembled upper well body 1 using a crane, then adjusts its position so that the four trapezoidal tenons 6 of the upper well body 1 and the trapezoidal mortises 15 of the lower well body 2 are aligned with each other. The trapezoidal tenons 6 are slowly placed into the trapezoidal mortises 15, so that the inverted trapezoidal block at the bottom of the trapezoidal tenon 6 and the inverted trapezoidal space at the bottom of the trapezoidal mortises 15 are interlocked. When the trapezoidal tenons 6 and the trapezoidal mortises 15 are fully interlocked, the fourth screw hole 16 on the outer wall of the lower well body 2 and the second screw hole 7 on the trapezoidal tenon 6 are concentrically aligned. The operator screws the second bolt 26 into the fourth screw hole 16 and the second screw hole 7, so that the upper well body 1 and the lower well body 2 are tightly fitted and fixed. At this time, the top of the outer wall of the first rubber ring 18 is tightly fitted with the bottom of the outer wall of the upper well body 1 to prevent water leakage.

[0021] Please see Figure 1 , Figure 2 , Figure 3 and Figure 5This utility model provides an embodiment of a segmented precast concrete inspection well, which is composed of an upper well body 1 and a lower well body 2 connected by trapezoidal tenons 6 and trapezoidal mortises 15. The inlet 20 is connected to the inner lower well cavity 27, and the outlet 22 is connected to the inner lower well cavity 27. The upper well cavity 19 is equipped with a ladder 9 and a climbing rod 10 to allow maintenance personnel to move up and down. The inlet 20 and outlet 22 of the lower well body 2 are respectively sealed to the external pipeline by a second rubber ring 24 and a third rubber ring 25, forming a complete segmented assembly structure. Furthermore, in actual use, the interlocking of the trapezoidal tenon 6 and trapezoidal mortise 15, along with the tightening of the second bolt 26, ensures the structural stability of the connection between the upper well body 1 and the lower well body 2, resisting the influence of soil pressure and settlement. The first rubber ring 18 expands when exposed to water, filling the gap at the connection between the upper well body 1 and the lower well body 2. The second rubber ring 24 and the third rubber ring 25 respectively seal the connection between the inlet 20 and the outlet 22 and the pipeline. The triple seal blocks the leakage path. The ladder 9 is double-fixed by the first bolt 12 and the connecting rod 8, providing a safe and reliable access for maintenance personnel. This facilitates the segmented assembly. Through the combination of mechanical fixing and elastic sealing, the structural strength and water tightness of the inspection well are guaranteed, adapting to the long-term use needs of complex working conditions such as municipal drainage.

[0022] Working principle: First, the upper well body 1 and the lower well body 2 are initially positioned by the interlocking of trapezoidal tenon 6 and trapezoidal mortise 15. The rectangular section of trapezoidal tenon 6 can ensure radial alignment, and the inverted trapezoidal section of trapezoidal tenon 6 can enhance vertical interlocking stability. Then, the two are rigidly fixed by the second bolt 26 passing through the concentrically aligned second screw hole 7 and fourth screw hole 16 to form an integral load-bearing structure to resist external soil pressure and settlement. Then, multiple rubber rings are used to prevent seepage. After the upper well body 1 and the lower well body 2 are attached to the second annular groove 17, the first rubber ring 18 fills the connection gap by using its water-expanding property. The first groove 21 and the second groove 23 are equipped with the second rubber ring 24 and the third rubber ring 25, which are in close contact with the outer wall of the external pipe. After encountering water, they expand and seal the pipe interface. The triple defense line blocks the water leakage path. Finally, the ladder 9 inside the upper well chamber 19 is fixed to the steel ring 13 and the upper well body 1 by the first bolt 12, and the connecting rod 8 is fitted into the connecting groove 5 to enhance stability, providing a safe passage for maintenance personnel, facilitating the inspection and maintenance of the well and pipeline system, and realizing the functions of rapid assembly, long-term stable operation and convenient operation and maintenance.

[0023] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A segmented precast concrete inspection well, comprising an upper well body (1), a trapezoidal tenon (6), a trapezoidal mortise (15), and a first rubber ring (18), characterized in that: The top of the outer wall of the upper well body (1) is provided with a first annular groove (3), and the four corners of the bottom of the outer wall of the upper well body (1) are provided with trapezoidal tenons (6). The top to the middle of the trapezoidal tenon (6) is a rectangular block, and the middle to the bottom of the trapezoidal tenon (6) is an inverted trapezoidal block. The outer wall of the trapezoidal tenon (6) and the inner wall of the trapezoidal mortise (15) fit together. The top to the middle of the trapezoidal mortise (15) is a rectangular space, and the middle to the bottom of the trapezoidal mortise (15) is an inverted trapezoidal space. The trapezoidal mortise (15) is provided at the four corners of the top of the outer wall of the lower well body (2). The top of the outer wall of the lower well body (2) is provided with a second annular groove (17), and a first rubber ring (18) is provided in the second annular groove (17).

2. The segmented precast concrete inspection well according to claim 1, characterized in that: The trapezoidal tenon (6) is provided with a second screw hole (7), which passes through both sides of the trapezoidal tenon (6). The lower well body (2) is provided with two fourth screw holes (16) on the front and rear sides of the outer wall. When the trapezoidal tenon (6) and the trapezoidal mortise (15) are fitted together, the second screw hole (7) and the fourth screw hole (16) are concentrically aligned. The second bolt (26) passes through the second screw hole (7) and the fourth screw hole (16) to connect and fix the upper well body (1) and the lower well body (2).

3. The segmented precast concrete inspection well according to claim 1, characterized in that: A steel ring (13) is installed in the first annular groove (3). The inner wall of the first annular groove (3) and the outer wall of the steel ring (13) are fitted together. A third screw hole (14) is provided on the side of the outer wall of the steel ring (13). The third screw hole (14) passes through both sides of the outer wall of the steel ring (13).

4. A segmented precast concrete inspection well according to claim 1, characterized in that: The upper wellbore (1) is provided with an upper well cavity (19), and a first screw hole (4) is provided on the top of the inner wall of the upper well cavity (19). The first screw hole (4) and the third screw hole (14) are concentrically aligned, and a connecting groove (5) is provided in the middle of the inner wall of the upper well cavity (19).

5. A segmented precast concrete inspection well according to claim 4, characterized in that: A ladder (9) is provided inside the upper well cavity (19). A fixing hole (11) is provided on the front side of the outer wall of the ladder (9). The fixing hole (11) is concentrically aligned with the first screw hole (4) in the upper well cavity (19) and the third screw hole (14) in the steel ring (13). The first bolt (12) passes through the fixing hole (11), the first screw hole (4) and the third screw hole (14) to fix the ladder (9) in the upper well cavity (19). A climbing rod (10) is provided on the ladder (9).

6. A segmented precast concrete inspection well according to claim 5, characterized in that: A connecting rod (8) is provided on the rear side of the outer wall of the ladder (9), and the connecting rod (8) is engaged with the connecting groove (5) on the inner wall of the upper well cavity (19).

7. A segmented precast concrete inspection well according to claim 1, characterized in that: The lower well body (2) is provided with a lower well cavity (27). An inlet (20) is provided on the front side of the outer wall of the lower well body (2). The inlet (20) penetrates the side wall of the lower well body (2) and is connected to the lower well cavity (27) inside. A first groove (21) is provided on the inner wall of the inlet (20). A second rubber ring (24) is installed in the first groove (21). An outlet (22) is provided on the rear side of the outer wall of the lower well body (2). The outlet (22) penetrates the side wall of the lower well body (2) and is connected to the lower well cavity (27) inside. A second groove (23) is provided on the inner wall of the outlet (22). A third rubber ring (25) is installed in the second groove (23).

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