Connecting device for inspection well and pipeline

Abstract

The utility model relates to the technical field of joints or sealing of underground structures, in particular to a connecting device for an inspection well and a pipeline, preformed holes are formed in a well wall, the connecting device comprises a connecting block, the connecting block comprises connecting clamping plates and an arc-shaped inserting plate, and each connecting clamping plate is provided with an arc-shaped groove; every two connecting blocks form a group, the two groups are located on the two sides of the well wall correspondingly, and the two connecting blocks in the same group are symmetrically arranged up and down; the arc-shaped inserting plate is inserted into the preformed hole, the connecting clamping plate abuts against the well wall, and the arc-shaped groove abuts against the pipeline; the two connecting blocks in the same group are locked and fixed through a locking mechanism; a drainage groove is formed in the connecting block on the upper side; a pouring channel is formed by gaps among the drainage groove, the well wall, the arc-shaped insertion plate, the preformed hole and the pipeline; compared with a manual concrete filling mode, effective pouring and flowing filling of the concrete can be achieved through the pouring channel, the problems of insufficient compactness, hollowing and the like caused by manual filling are avoided, and the concrete compactness of the connecting joint is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of joint reinforcement or sealing technology for underground structures, specifically a connection device for inspection wells and pipelines. Background Technology

[0002] Inspection wells, as key structures in urban drainage systems, are typically located at the intersections, turning points, slope changes, and sections of drainage pipes that require regular inspection and cleaning. Their function is to ensure the normal operation and maintenance of the drainage network.

[0003] In existing technologies, the connection between inspection wells and drainage pipes is typically achieved by filling and fixing them with cement-based materials. During construction, concrete is manually filled into the gap between the pipe and the inspection well to solidify them. However, this process has the following technical drawbacks: 1. Insufficient compaction: Manual filling easily leads to poor compaction of the concrete at the connection interface, resulting in hollow defects and affecting the overall structural integrity; 2. Material loss: Before initial setting, the concrete's fluidity makes it prone to overflowing from the connection point, requiring secondary grouting, reducing construction efficiency and wasting materials; 3. Structural damage risk: During long-term service, due to the difference in pipe length between the inside and outside of the well (the outside pipe section is significantly longer than the inside pipe section), the backfill soil will exert an asymmetric bending moment on the vertical load of the outside pipe, causing unbalanced stress on the inspection well wall. Under this condition, the following failure modes are likely to occur: plastic deformation occurs in the bottom area of ​​the outside pipe section and the top area of ​​the inside pipe section due to stress concentration; the concrete at the connection point crushes and fails, subsequently inducing structural damage such as interface leakage, circumferential cracking, and pipe misalignment.

[0004] It is worth noting that the aforementioned connection parts are concealed works. Once damaged, the repair work is characterized by a large excavation area, long construction period, and significant traffic impact, resulting in extremely high economic and social costs.

[0005] To significantly reduce the probability of damage to the manhole-pipe connection node and extend the service life of the drainage system, this utility model proposes a connection reinforcement device for manholes and pipes to improve the long-term stability of the connection node. Utility Model Content

[0006] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a connection reinforcement device for inspection wells and pipelines that can strengthen the connection position, increase the density of concrete at the connection node, and extend the service life of the drainage system.

[0007] The technical solution adopted by this utility model to solve its technical problem is:

[0008] A connection and reinforcement device for manholes and pipelines is disclosed. The manhole wall has a pre-drilled hole through which the pipeline passes. The connection device includes four connecting blocks, each comprising a connecting clamp and an arc-shaped insert plate on one side of the clamp. Each clamp has an arc-shaped groove adapted to the pipeline. The four connecting blocks are arranged in pairs, with two groups located on the left and right sides of the manhole wall, and the two blocks in the same group arranged symmetrically vertically. The arc-shaped insert plate is inserted into the pre-drilled hole, the connecting clamp abuts against the manhole wall, and the arc-shaped groove abuts against the pipeline. The two connecting blocks in the same group are locked to the pipeline by a locking mechanism. A drainage groove is provided on the upper connecting block, and the length of the arc-shaped insert plate is less than half the depth of the pre-drilled hole. The gaps between the drainage groove, the manhole wall, the arc-shaped insert plate, the pre-drilled hole, and the pipeline form a casting channel.

[0009] Compared with the prior art, the outstanding features of this utility model, which adopts the above technical solution, are:

[0010] The connecting clamp and the arc-shaped groove abut against the well wall and the pipe respectively, and together with the locking mechanism, the connecting block and the pipe are locked and fixed, making the connection between the connecting device and the pipe and well wall more stable. This can effectively resist the vertical load and asymmetric bending moment generated by the backfill soil on the pipe outside the well, and reduce the risks of pipe plastic deformation and concrete crushing failure at the connection point. At the same time, the upper connecting block is equipped with a drainage groove, and the length of the arc-shaped insert plate is less than half the depth of the reserved hole. This makes the gap between the drainage groove, the well wall, the arc-shaped insert plate, the reserved hole and the pipe form a pouring channel, which is more efficient than existing methods. The technology utilizes a manual concrete filling method. This pouring channel enables effective concrete pouring and flow filling, avoiding problems such as insufficient compaction and hollow defects caused by manual filling. It ensures the concrete compaction of the connection joint and improves the long-term stability of the connection joint. Furthermore, pouring concrete through the channel prevents concrete from overflowing from the connection area before initial setting, reducing the need for secondary grouting, improving construction efficiency, and reducing material waste. In addition, this structure can effectively solve the structural damage problem caused by uneven stress on the pipes inside and outside the well, extending the service life of the drainage system.

[0011] As a preferred embodiment, a further technical solution of this utility model is:

[0012] Preferably, the locking mechanism includes a locking screw, and the connecting plates are provided with longitudinal through holes. The locking screw passes through the two connecting plates through two corresponding longitudinal through holes, and is further locked and fixed by locking nuts. The structure is simple and easy to operate, which allows construction personnel to quickly lock and fix the two connecting blocks in the same group to the pipeline. It can provide reliable fastening force, ensure the stability of the connection between the connecting blocks and the pipeline, prevent the connecting blocks from loosening during use, and further enhance the overall stability of the manhole and pipeline connection device.

[0013] Preferably, each connecting clamp has two longitudinal through holes symmetrically arranged on the left and right sides; compared with a single or asymmetrical through hole, the locking force of the connecting block on the pipeline can be more evenly distributed, ensuring the strength of the connection structure between the inspection well and the pipeline.

[0014] Preferably, the drainage channel connects the top surface of the connecting clamp and the end face of the arc-shaped insert plate; it provides a clear and smooth channel for concrete pouring, ensuring that the concrete can flow smoothly from the top surface of the connecting clamp into the gap between the reserved hole and the pipe through the drainage channel.

[0015] Preferably, a water-swellable sealing layer is provided on the inner wall of the arc-shaped groove; it serves to seal the gap between the arc-shaped groove and the pipe during concrete pouring, preventing concrete from overflowing.

[0016] Preferably, the side cross-section of the connecting clamp is a right-angled trapezoidal structure; this further enhances the support and disperses the uneven stress on the pipeline located on both sides of the well wall.

[0017] Preferably, the inner diameter of the arc-shaped insert plate is greater than or equal to the inner diameter of the arc-shaped groove and less than the inner diameter of the reserved hole; this ensures the fitting accuracy between the connecting block and the pipe and well wall, which not only ensures the effective fixing of the connecting block to the pipe, but also allows a suitable gap to be formed between the arc-shaped insert plate and the reserved hole for concrete pouring, ensuring the normal use of the concrete pouring channel and improving the installation convenience and connection stability of the connecting device. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the connection structure between the inspection well and the pipeline in an embodiment of this utility model;

[0019] Figure 2 This is a schematic diagram of the connecting device in an embodiment of the present invention;

[0020] Figure 3 This is a schematic diagram of the connecting block in an embodiment of this utility model.

[0021] Explanation of reference numerals in the attached drawings: 1. Well wall; 2. Pipeline; 3. Connecting block; 301. Connecting clamp; 302. Arc-shaped insert; 303. Drainage channel; 4. Locking mechanism; 401. Locking screw; 402. Locking nut; 5. Water-swellable sealing layer. Detailed Implementation

[0022] The present invention will be further described below with reference to specific embodiments. The purpose of this description is only to better understand the content of the present invention. Therefore, the examples given do not limit the scope of protection of the present invention.

[0023] like Figures 1 to 3As shown, this embodiment provides a connection device for a manhole and a pipe 2. A reserved hole is provided on the manhole wall 1, and the pipe 2 passes through the reserved hole into the manhole. The connection device includes four connecting blocks 3. Each connecting block 3 includes a connecting clamp 301 and an arc-shaped insert 302 disposed on one side of the connecting clamp 301. Each connecting clamp 301 is provided with an arc-shaped groove adapted to the pipe 2. One of the connecting blocks 3 is provided with a drainage groove 303. The length of the arc-shaped insert 302 is less than half the depth of the reserved hole. Four connecting blocks 3 are arranged in pairs, with two groups of connecting blocks 3 located on the left and right sides of the well wall 1, and the two connecting blocks 3 in the same group arranged symmetrically vertically. An arc-shaped insert plate 302 is inserted into a pre-drilled hole, a connecting clamp plate 301 abuts against the well wall 1, and an arc-shaped groove abuts against the pipe 2. The two connecting blocks 3 in the same group are locked and fixed to the pipe 2 by a locking mechanism 4. To facilitate concrete pouring, one connecting block 3 with a drainage channel 303 is located on the upper side. The gap between the drainage channel 303, the well wall 1, the arc-shaped insert plate 302, the pre-drilled hole, and the pipe 2 forms a pouring channel. The drainage channel 303 connects the top surface of the connecting clamp plate 301 and the end face of the arc-shaped insert plate 302. The inner diameter of the arc-shaped insert plate 302 is greater than or equal to the inner diameter of the arc-shaped groove and less than the inner diameter of the pre-drilled hole. The connecting blocks 3 can be prefabricated using fiber-reinforced cementitious composite material (FRCC) or high-performance polymer concrete (PC).

[0024] In use, first insert the arc-shaped insert plates 302 of the two lower connecting blocks 3 into the reserved holes, then pass the pipe through, and then insert the arc-shaped insert plates 302 of the two upper connecting blocks 3 into the reserved holes. The construction personnel press the connecting clamps 301 tightly so that the inner side of the connecting clamps 301 is tightly against the well wall. At the same time, the two connecting blocks in the same group (corresponding to each other) are locked by the locking device. Cement mortar is poured into the pouring channel through the drainage channel 303. After the concrete has set, the connecting blocks 3, well wall 1, and pipe 2 are firmly connected by this connecting device and the concrete. During the long-term service of the pipeline, the connecting device can distribute the unbalanced load on the pipeline (for example, the pressure of the backfill soil on the outside of the well wall 1 on the pipe 2), thereby protecting the connection node between the pipe 2 and the inspection well and avoiding frequent repairs at the connection node.

[0025] Furthermore, the side section of the connecting clamp 301 has a right-angled trapezoidal structure, which further enhances the support and disperses the uneven stress on the pipeline located on both sides of the well wall.

[0026] Furthermore, the cross-section of the diversion channel 303 is trapezoidal or semi-circular to facilitate the flow of concrete.

[0027] like Figure 2 The locking mechanism 4 includes a locking screw 401. The connecting clamp 301 is provided with a longitudinal through hole. The locking screw 401 passes through the two connecting clamps 301 through two corresponding longitudinal through holes, and is further locked and fixed by a locking nut 402. Each connecting clamp 301 has two longitudinal through holes symmetrically arranged on the left and right sides.

[0028] To prevent concrete from flowing out from the gap between the arc-shaped groove of the connecting clamp 301 and the pipe 2, a water-swellable sealing layer 5 is provided on the inner side wall of the arc-shaped groove; the water-swellable sealing layer 5 can be made of water-swellable rubber or water-swellable sealing strip.

[0029] This invention achieves mechanical fixation between the pipe 2 and the inspection well through four modularly designed connecting blocks 3 and a locking mechanism 4. Combined with symmetrically arranged arc-shaped inserts 302 and drainage channels 303, it forms an optimized concrete pouring channel, ensuring dense filling without voids. Simultaneously, the water-swellable sealing layer 5 and the micro-expansion concrete form a double seal, effectively solving leakage problems caused by insufficient density, material loss, and uneven stress in traditional processes. Its innovative structure not only improves construction efficiency but also evenly distributes the load on the pipe 2, significantly extending the service life of the inspection well.

[0030] The above description is merely a preferred embodiment of the present utility model and does not limit the scope of the present utility model. All equivalent changes made based on the content of the present utility model specification and its drawings are included within the scope of the present utility model.

Claims

1. A connection device for a manhole and a pipeline, wherein a reserved hole is provided on the manhole wall (1), and a pipeline (2) passes through the reserved hole into the manhole, characterized in that: The connecting device includes four connecting blocks (3), each connecting block (3) includes a connecting clamp (301) and an arc-shaped insert (302) disposed on one side of the connecting clamp (301). Each connecting clamp (301) is provided with an arc-shaped groove adapted to the pipe (2). Four connecting blocks (3) are arranged in pairs, with the two sets of connecting blocks (3) located on the left and right sides of the well wall (1) respectively. The two connecting blocks (3) in the same group are arranged symmetrically up and down. The arc-shaped insert plate (302) is inserted into the reserved hole, the connecting clamp plate (301) abuts against the well wall (1), and the arc-shaped groove abuts against the pipe (2). The two connecting blocks (3) in the same group are locked and fixed to the pipe (2) by the locking mechanism (4). A diversion channel (303) is provided on a connecting block (3) located on the upper side, and the length of the arc-shaped insert plate (302) is less than half the depth of the reserved hole; the gap between the diversion channel (303), the well wall (1), the arc-shaped insert plate (302), the reserved hole and the pipe (2) constitutes the pouring channel.

2. The connection device for inspection wells and pipelines according to claim 1, characterized in that: The locking mechanism (4) includes a locking screw (401), and the connecting clamp (301) is provided with a longitudinal through hole. The locking screw (401) passes through the two connecting clamps (301) through two corresponding longitudinal through holes, and is further locked and fixed by the locking nut (402).

3. The connection device for inspection wells and pipelines according to claim 2, characterized in that: Each connecting clamp (301) has two longitudinal through holes symmetrically arranged on the left and right sides.

4. The connection device for inspection wells and pipelines according to claim 1, characterized in that: The drainage channel (303) connects the top surface of the connecting clamp (301) and the end face of the arc-shaped insert (302).

5. The connection device for inspection wells and pipelines according to claim 1, characterized in that: A water-swellable waterproof layer (5) is provided on the inner side wall of the arc-shaped groove.

6. The connection device for inspection wells and pipelines according to claim 1, characterized in that: The side section of the connecting clamp (301) is a right-angled trapezoidal structure.

7. The connection device for inspection wells and pipelines according to claim 1, characterized in that: The inner diameter of the arc-shaped insert (302) is greater than or equal to the inner diameter of the arc-shaped groove and less than the inner diameter of the reserved hole.

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