A pipe sealing connection structure and method for prefabricated wells

Abstract

This invention provides a pipe sealing connection structure and method for prefabricated wells. The connection structure includes a prefabricated well body and a water pipe. Connecting cylinders are respectively provided on both sides of the main cylinder of the prefabricated well body. The water pipe is connected to the connecting cylinders through a sealing connection assembly and a fixing and locking mechanism. The sealing connection assembly includes a sealing ring plate, a sealing sleeve, a first sealing ring, and multiple fixing bolts. The water pipe extends into the sealing sleeve of the connecting cylinder, and its outer wall is sealed to the sealing sleeve through the first sealing ring. The fixing and locking mechanism includes a fixing cylinder fixedly fitted onto the outside of the connecting cylinder and a protective sleeve fitted onto the outside of the water pipe. A connecting post is provided between the fixing cylinder and the protective sleeve. The sealing ring plate seals the opening of the connecting cylinder and is fixedly connected to the fixing cylinder through the fixing bolts. In this invention, when the water pipe is inserted into the inner cavity of the sealing sleeve, the sealing ring will be tightly fitted to the surface of the water pipe under the pressure of the water pipe, thereby sealing the water flow and preventing it from flowing out.

Description

Technical Field

[0001] This invention relates to the field of precast well sealing technology, specifically a precast well pipe sealing connection structure and method. Background Technology

[0002] In recent years, with the continuous development of urban construction, pipeline construction has become increasingly important. Water pipeline construction is an important part of municipal infrastructure. During the construction of water pipelines, prefabricated manholes need to be constructed at intervals along the road surface as inspection and maintenance manholes to facilitate regular inspection of ancillary structures.

[0003] The existing connection method between precast wells and water pipes mostly involves cutting a groove on the side of the precast well, inserting the water pipe into the interior of the precast well through the groove, and installing and connecting it with sealing rubber rings and other sealing structures. Because of the groove cutting in the precast well, the connection strength between the water pipe and the precast well is not high during use, and the sealing at the connection is poor. This leads to water leakage at the connection between the municipal pipeline and the precast well during later operations, resulting in low stability of the precast well during use.

[0004] Chinese patent CN201474077U discloses a connection device for prefabricated wells, comprising a prefabricated well, a wound water pipe, and a water-swellable sealing ring. The water-swellable sealing ring, fixed to the wound water pipe, is located between the socket and the prefabricated well. The water-swellable sealing ring can be an annular ring or a water-swellable sealing tape. This prefabricated well prevents strength reduction due to grooved sockets, saves raw materials, and effectively prevents socket cracking and water leakage, thus protecting the environment. However, this connection device uses a water-swellable sealing ring for sealing, and the water pipe is directly inserted into the socket without other fixing devices, resulting in poor sealing performance and poor stability of the connection.

[0005] Patent publication number CN203487551U discloses a safer and more reliable pipeline inspection well, including an inspection well body, several connecting pipes communicating with the inspection well body on the inspection well body, a base plate below the inspection well body, a sedimentation chamber below the base plate, and a sealing device above the inspection well body. CN203487551U has a relatively simple connection structure in use, mostly involving inserting the municipal pipeline into the inspection well and then sealing the connection with concrete. This installation and connection method has poor sealing performance, and cracks may appear at the connection when the municipal pipeline is used for a long time, reducing the sealing performance during use. Furthermore, the stability of the installation connection is not high; when the municipal pipeline is subjected to surface pressure, one end may tilt upwards, leading to breakage or even detachment of the connection between the municipal pipeline and the inspection well. Summary of the Invention

[0006] To address the problems existing in the background art, the present invention provides a prefabricated well pipe sealing connection structure and method. The present invention can ensure the sealing of the prefabricated connection of the drainage hanger, avoid water leakage, and ensure a firm and stable connection.

[0007] To achieve the above objectives, the present invention provides a prefabricated well pipe sealing connection structure. The connection structure includes a prefabricated well body and a water pipe. The prefabricated well body includes a main cylinder and a top cover at the cylinder opening. Connecting cylinders are respectively provided on both sides of the main cylinder. The water pipe is connected to the connecting cylinders through a sealing connection assembly and a fixing and locking mechanism. The sealing connection assembly includes a sealing ring plate, a sealing sleeve fixed inside the connecting cylinder, a first sealing ring fixed inside the sealing sleeve, and multiple fixing bolts. The inner diameter of the sealing sleeve matches the outer diameter of the water pipe. The water pipe extends into the sealing sleeve of the connecting cylinder, and the outer wall of the water pipe is sealed to the sealing sleeve through the first sealing ring. The fixing and locking mechanism includes a fixing cylinder sleeved outside the connecting cylinder and a protective sleeve sleeved outside the water pipe. The fixing cylinder is fixedly sleeved to the connecting cylinder, and at least two connecting posts are provided between the fixing cylinder and the protective sleeve. The sealing ring plate is sleeved outside the water pipe and seals the cylinder opening of the connecting cylinder, and is fixedly connected to the fixing cylinder through multiple fixing bolts.

[0008] The preferred technical solution of the present invention is as follows: the outer diameter of the sealing ring plate is larger than the outer diameter of the connecting cylinder. An annular protrusion with an outer diameter matching the inner diameter of the connecting cylinder and an inner diameter matching the inner diameter of the sealing sleeve is provided on the side of the sealing ring plate adjacent to the connecting cylinder. An annular groove is provided on the inner wall of the annular protrusion. An annular locking block matching the annular groove is provided at the connection end of the water pipe and the connecting cylinder. The distance between the annular locking block and the water pipe port is matched with the length of the connecting cylinder. The inner ring diameter of the sealing ring plate matches the outer diameter of the annular locking block on the water pipe. The water pipe passes through the annular protrusion and the sealing sleeve from the inner ring of the sealing ring plate and extends into the main cylinder of the precast well. The annular locking block is engaged in the annular groove.

[0009] The preferred technical solution of the present invention is as follows: the outer wall of the connecting cylinder is provided with bolt holes, the fixed cylinder is movably sleeved on the outer wall of the connecting cylinder and fixedly connected by connecting bolts and a second nut, and the connecting bolts pass through the bolt holes and are in close contact with the surface of the connecting block.

[0010] A preferred technical solution of the present invention is as follows: the fixing and locking mechanism further includes a circular fixing ring fixedly sleeved outside the protective sleeve, one end of the connecting column is fixedly connected to the fixing cylinder, and the other end is fixedly connected to the circular fixing ring.

[0011] The preferred technical solution of the present invention is as follows: the fixing bolt is inserted into the cylinder wall of the fixing cylinder from the circumferential surface of the sealing ring plate and fixed and locked; a first nut is threadedly connected to the surface of the fixing bolt, and one side of the first nut is in close contact with one side of the sealing ring plate.

[0012] A preferred technical solution of the present invention is as follows: a cylinder top cover is movably connected to the top of the main cylinder body, the cylinder top cover is circular, an embedded block is fixedly connected to the bottom of the cylinder top cover, and the embedded block is movably connected to the top of the inner cavity of the main cylinder body.

[0013] A preferred technical solution of the present invention is as follows: handles are fixedly connected to both sides of the top of the cylinder opening cover, the handles are U-shaped, and a pry hole is provided on the right side of the top of the cylinder opening cover.

[0014] The preferred technical solution of the present invention is as follows: a plurality of first sealing rings are provided and are equidistantly distributed on the inner wall of the sealing sleeve; second sealing rings are respectively fitted on both sides of the annular block of the water pipe; and a third sealing ring is fitted on the outside of the annular protrusion.

[0015] The present invention also provides a method for sealing and connecting pipes in a precast well. The method uses the above-mentioned pipe sealing structure to seal and connect the water pipe to the precast well. The specific steps are as follows:

[0016] S1. Based on the hole height of the precast well body, excavate the water pipe trench and the precast well trench to the design depth, and the height of the water pipe trench matches the height of the connecting cylinder on the precast well.

[0017] S2. Hoist the precast well body to the precast well trench, place multiple pad rollers at intervals in the water pipe trench, and hoist the water pipe to the water pipe trench, placing the water pipe on the pad rollers.

[0018] S3. A sealing connection assembly and a fixing and locking mechanism are installed on the two sides of the connecting cylinder of the precast well body, and the bolts are not fixed.

[0019] S4. Pass the connecting ends of each water pipe through the protective sleeve, sealing ring plate and sealing sleeve in sequence and then insert them into the precast well, and fix and lock the bolts of the fixing and locking mechanism.

[0020] S5. The top cover of the hoisting cylinder is placed on the upper part of the precast well body to complete the connection between the precast well and the water pipe.

[0021] A preferred technical solution of the present invention is to create a stepped groove between the water pipe groove and the prefabricated well groove.

[0022] The beneficial effects of this invention are:

[0023] 1. The present invention firstly involves placing a fixed sleeve on the surface of the connecting block, then passing the water pipe through the inner cavity of the protective sleeve. At this time, the water pipe is inserted into the inner cavity of the sealing sleeve. Under the pressure of the water pipe, the sealing ring will tightly adhere to the surface of the water pipe, thereby completing the sealing of the water flow and preventing it from flowing out. This ensures the sealing performance of the connection between the water pipe and the precast well, and avoids the problem of water leakage due to cracks appearing in the cement seal over a long period of time.

[0024] 2. The present invention, through the setting of the fixing cylinder, can be installed on the surface of the connecting block, thereby facilitating the installation of the sealing ring plate. The setting of the circular fixing ring provides support and fixation for the protective sleeve, preventing the protective sleeve from being squeezed and deviating during backfilling operations, and increasing the strength of the connection part, making the connection more stable.

[0025] This invention involves placing a fixed sleeve on the surface of the connecting block, passing the water pipe through the inner cavity of the protective sleeve, and then inserting the water pipe into the inner cavity of the sealing sleeve. Under the pressure of the water pipe, the sealing ring will tightly adhere to the surface of the water pipe, thereby sealing the water flow and preventing it from leaking out. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0027] Figure 2 This is a schematic diagram showing the connection between the handle and the top cover of the cylinder in this invention;

[0028] Figure 3 This is a schematic diagram of the installation of the sealing assembly in this invention;

[0029] Figure 4 This is a schematic diagram of the fixing and locking mechanism in this invention;

[0030] Figure 5 This is a schematic diagram showing the connection between the sealing ring plate and the connecting cylinder in this invention;

[0031] Figure 6 This is a schematic diagram of the sealing ring plate in this invention;

[0032] Figure 7 This is a schematic diagram of the water pipe connection end in this invention;

[0033] Figure 8 This is an internal schematic diagram of the connection between the water pipe and the prefabricated well in this invention;

[0034] Figure 9 This is a schematic diagram of the construction status of the connection between the water pipe and the prefabricated well in this invention;

[0035] Figure 10 This is a flowchart of the construction method of the present invention.

[0036] The attached figures are labeled as follows: 1. Precast well body; 101. Main cylinder; 102. Pry hole; 103. Handle; 104. Top cover of cylinder opening; 105. Embedded block; 106. Connecting cylinder; 107. Bolt hole; 2. Sealing connection assembly; 201. Sealing ring plate; 202. Annular protrusion; 203. First nut; 204. Fixing bolt; 205. First sealing ring; 206. Sealing sleeve; 207. Annular groove; 208. Third sealing ring; 3. Fixing and locking mechanism; 301. Fixing cylinder; 302. Connecting column; 303. Circular fixing ring; 304. Protective sleeve; 305. Connecting bolt; 306. Second nut; 4. Water pipe; 401. Annular block; 402. Second sealing ring; 5. Precast well groove; 6. Pad roller; 7. Stepped groove; 8. Water pipe groove. Detailed Implementation

[0037] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0038] An embodiment provides a prefabricated well pipe sealing connection structure, such as Figures 1 to 2 As shown, the well includes a prefabricated well body 1 and a water pipe 4. The prefabricated well body 1 includes a main cylinder 101 and a top cover 104. Connecting cylinders 106 are respectively provided on both sides of the main cylinder 101. The water pipe 4 is connected to the connecting cylinders 106 through a sealing connection assembly 2 and a fixing locking mechanism 3. The top cover 104 is movably connected to the top of the main cylinder 101. The top cover 104 is circular. An embedded block 105 is fixedly connected to the bottom of the top cover 104. The embedded block 105 is movably connected to the top of the inner cavity of the main cylinder 101. Through the above technical solution, the top cover 104 can block and limit impurities, preventing other debris from entering the interior of the main cylinder 101. Handles 103 are fixedly connected to both sides of the top of the top cover 104. The handles 103 are U-shaped. A pry hole 102 is provided on the right side of the top of the top cover 104. The handle 103 allows operators to more easily open the top cover 104 of the cylinder mouth to inspect its interior. The pry hole 102 prevents the top cover 104 of the cylinder mouth from becoming difficult to open if it is not opened for a long time. It can be pried open with a pry bar through the pry hole 102.

[0039] An embodiment provides a prefabricated well pipe sealing connection structure, such as Figure 1 and Figures 2 to 9As shown, the sealing connection assembly 2 includes a sealing ring plate 201, a sealing sleeve 206 fixed inside the connecting cylinder 106, a first sealing ring 205 fixed inside the sealing sleeve 206, and a plurality of fixing bolts 204. The inner diameter of the sealing sleeve 206 matches the outer diameter of the water pipe 4. The water pipe 4 extends into the sealing sleeve 206 of the connecting cylinder 106, and the outer wall of the water pipe 4 is sealed to the sealing sleeve 206 by the first sealing ring 205. The fixing and locking mechanism 3 includes a fixing cylinder 301 sleeved outside the connecting cylinder 106, a protective sleeve 304 sleeved outside the water pipe 4, and a circular fixing ring 303 fixedly sleeved outside the protective sleeve 304. The fixing cylinder 301 is fixedly sleeved to the connecting cylinder 106. At least two connecting posts 302 are provided between the fixing cylinder 301 and the protective sleeve 304. One end of the connecting post 302 is fixedly connected to the fixing cylinder 301, and the other end is fixedly connected to the circular fixing ring 303. The connecting post 302 can be fixedly connected to the fixing cylinder 301 and the circular fixing ring 303, or can be movably connected through a connector. The sealing ring plate 201 is sleeved on the outside of the water pipe 4 and seals the opening of the connecting cylinder 106. It is fixedly connected to the fixing cylinder 301 by multiple fixing bolts 204. The fixing bolts 204 are inserted into the cylinder wall of the fixing cylinder 301 from the annular surface of the sealing ring plate 201 and locked in place. A first nut 203 is threaded onto the surface of the fixing bolt 204, and one side of the first nut 203 is in close contact with one side of the sealing ring plate 201. The outer wall of the connecting cylinder 106 is provided with bolt holes 107. The fixing cylinder 301 is movably sleeved on the outer wall of the connecting cylinder 106 and fixedly connected by connecting bolts 305 and second nuts 306. The connecting bolts 305 pass through the bolt holes 107 and are in close contact with the surface of the connecting block.

[0040] In this embodiment, the fixing cylinder 301 can be installed on the surface of the connecting block, thereby facilitating the installation of the sealing ring plate 201. The circular fixing ring 303 provides support and fixation for the protective sleeve 304, preventing it from shifting due to compression during backfilling operations. The second nut 306 and connecting bolt 305 secure the fixing cylinder 301 to the surface of the connecting block, facilitating its positioning and fixing. The first nut 203 can be fixedly installed on the surface of the connecting block.

[0041] An embodiment provides a prefabricated well pipe sealing connection structure, such as Figures 3 to 9As shown, the outer diameter of the sealing ring plate 201 is larger than the outer diameter of the connecting cylinder 106. On the side of the sealing ring plate 201 adjacent to the connecting cylinder 106, there is an annular protrusion 202 with an outer diameter matching the inner diameter of the connecting cylinder 106 and an inner diameter matching the inner diameter of the sealing sleeve 206. An annular groove 207 is provided on the inner wall of the annular protrusion 202. The connection end of the water pipe 4 and the connecting cylinder 106 is provided with an annular locking block 401 that matches the annular groove 207, and the distance between the annular locking block 401 and the port of the water pipe 4 matches the length of the connecting cylinder 106. The inner ring diameter of the sealing ring plate 201 matches the outer diameter of the annular locking block 401 on the water pipe 4. The water pipe 4 passes through the annular protrusion 202 and the sealing sleeve 206 from the inner ring opening of the sealing ring plate 201 and extends into the precast well main cylinder 101, where the annular locking block 401 is engaged in the annular groove 207. Multiple first sealing rings 205 are provided and are equidistantly distributed on the inner wall of the sealing sleeve 206; second sealing rings 402 are respectively fitted on both sides of the annular locking block 401 of the water pipe 4, and third sealing rings 208 are fitted on the annular protrusion 202.

[0042] The installation process of this invention is as follows: the fixing sleeve 301 is fitted onto the surface of the connecting sleeve 201, and then the connecting bolt 305 and the second nut 306 are rotated to the surface of the connecting sleeve 201. Next, the water pipe 4 is passed through the inner cavity of the protective sleeve 304. At this time, the water pipe 4 is inserted into the inner cavity of the sealing sleeve 206. Then, the sealing ring plate 201 is aligned with the fixing bolt 204 and pushed onto the surface of the connecting block. The first nut 203 is fitted onto the surface of the fixing bolt 204. Finally, the first nut 203 is tightened to complete the fixing of the sealing ring plate 201. An annular protrusion 202 is provided on the inner side of the sealing ring plate 201. An annular groove is provided on the inner wall of the annular protrusion 202. The annular protrusion 202 is fitted with a third sealing ring 208. An annular block 401 is provided at one end of the water pipe 4 that is connected to the sealing connection assembly 2. The annular protrusion 202 of the sealing ring plate 201 is embedded in the connecting cylinder 106 and sealed by the third sealing ring 208. After the water pipe 4 is inserted into the sealing sleeve 206, the annular block 401 engages with the annular groove 207 on the sealing ring plate 201. The engagement part is sealed by the second sealing ring 402.

[0043] The method of the present invention will be further described below with reference to embodiments. An embodiment provides a method for sealing and connecting pipes in a precast well. The above-described pipe sealing structure is used to seal and connect water pipes to the precast well. The construction process is as follows: Figure 10 As shown, the specific construction steps are as follows:

[0044] S1, such as Figure 9 As shown, based on the hole height of the precast well body, the water pipe trench 8 and the precast well trench 5 are excavated to the design depth, and the height of the water pipe trench matches the height of the connecting cylinder on the precast well; and a stepped trench 7 is opened between the water pipe trench 8 and the precast well trench 5.

[0045] S2. Hoist the precast well body 1 to the precast well trench 5, place multiple pad rollers 6 at intervals in the water pipe trench 8, and hoist the water pipe 4 to the water pipe trench 8, with the water pipe placed on the pad rollers 6.

[0046] S3. A sealing connection assembly 2 and a fixing locking mechanism 3 are respectively installed on the outside of the connecting cylinders 106 on both sides of the prefabricated well body 1, and the bolts are not fixed.

[0047] S4, such as Figure 8 As shown, the connecting ends of each side water pipe 4 are sequentially passed through the protective sleeve 304, the sealing ring plate 201 and the sealing sleeve 206 and then extended into the precast well, and the bolts of the fixing and locking mechanism 3 are fixed and locked.

[0048] S5. The top cover of the hoisting cylinder is placed on the upper part of the precast well body to complete the connection between the precast well and the water pipe.

[0049] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A prefabricated well pipe sealing connection structure, comprising a prefabricated well body (1) and a water pipe (4), characterized in that: The prefabricated well body (1) includes a main cylinder (101) and a top cover (104) at the cylinder opening. Connecting cylinders (106) are respectively provided on both sides of the main cylinder (101). The water pipe (4) is connected to the connecting cylinder (106) through a sealing connection assembly (2) and a fixing locking mechanism (3). The sealing connection assembly (2) includes a sealing ring plate (201), a sealing sleeve (206) fixed in the connecting cylinder (106), a first sealing ring (205) fixed in the sealing sleeve (206), and multiple fixing bolts (204). The inner diameter of the sealing sleeve (206) matches the outer diameter of the water pipe (4). The water pipe (4) extends into the sealing sleeve (106). The water pipe (4) is sealed to the outer wall of the sleeve (206) by a first sealing ring (205); the fixing and locking mechanism (3) includes a fixing cylinder (301) sleeved on the outside of the connecting cylinder (106) and a protective sleeve (304) sleeved on the outside of the water pipe (4). The fixing cylinder (301) is fixedly sleeved on the connecting cylinder (106), and at least two connecting columns (302) are provided between the fixing cylinder (301) and the protective sleeve (304); the sealing ring plate (201) is sleeved on the outside of the water pipe (4) and seals the opening of the connecting cylinder (106), and is fixedly connected to the fixing cylinder (301) by multiple fixing bolts (204); The outer diameter of the sealing ring plate (201) is larger than the outer diameter of the connecting cylinder (106). An annular protrusion (202) with an outer diameter matching the inner diameter of the connecting cylinder (106) and an inner diameter matching the inner diameter of the sealing sleeve (206) is provided on the side of the sealing ring plate (201) adjacent to the connecting cylinder (106). An annular groove (207) is provided on the inner wall of the annular protrusion (202). An annular locking block (401) matching the annular groove (207) is provided at the connection end of the water pipe (4) and the connecting cylinder (106). The distance between the annular locking block (401) and the port of the water pipe (4) matches the length of the connecting cylinder (106). The sealing... The inner diameter of the ring plate (201) matches the outer diameter of the annular locking block (401) on the water pipe (4). The water pipe (4) passes through the annular protrusion (202) and the sealing sleeve (206) from the inner opening of the sealing ring plate (201) and extends into the main cylinder (101) of the precast well. Its annular locking block (401) is engaged in the annular groove (207). The outer wall of the connecting cylinder (106) is provided with bolt holes (107). The fixed cylinder (301) is movably sleeved on the outer wall of the connecting cylinder (106) and fixedly connected by connecting bolts (305) and second nuts (306). The connecting bolts (305) pass through the bolt holes (107).

2. The precast well pipe sealing connection structure according to claim 1, characterized in that: The fixing and locking mechanism (3) also includes a circular fixing ring (303) fixedly sleeved outside the protective sleeve (304). One end of the connecting column (302) is fixedly connected to the fixing cylinder (301), and the other end is fixedly connected to the circular fixing ring (303).

3. The prefabricated well pipe sealing connection structure according to claim 1, characterized in that: The fixing bolt (204) is inserted into the cylinder wall of the fixing cylinder (301) from the annular surface of the sealing ring plate (201) and fixed and locked; a first nut (203) is threaded on the surface of the fixing bolt (204), and one side of the first nut (203) is in close contact with one side of the sealing ring plate (201).

4. The precast well pipe sealing connection structure according to claim 1, characterized in that: The top of the main cylinder (101) is movably connected to a cylinder mouth cover (104), which is circular. The bottom of the cylinder mouth cover (104) is fixedly connected to an inner block (105), which is movably connected to the top of the inner cavity of the main cylinder (101).

5. The precast well pipe sealing connection structure according to claim 1, characterized in that: The top of the cylinder cap (104) is fixedly connected to both sides of the top with handles (103). The handles (103) are U-shaped. A pry hole (102) is provided on the right side of the top of the cylinder cap (104).

6. The pipe sealing connection structure for a prefabricated well according to claim 1, characterized in that: The first sealing ring (205) is provided in multiples and is distributed at equal intervals on the inner wall of the sealing sleeve (206); the second sealing ring (402) is respectively fitted on both sides of the annular block (401) of the water pipe (4); the third sealing ring (208) is fitted on the annular protrusion (202).

7. A method for sealing and connecting pipes in a precast well, characterized in that: The method uses the pipe sealing connection structure described in any one of claims 1 to 6 to perform a sealing connection between the water pipe and the precast well. The specific steps are as follows: S1. Based on the hole height of the precast well body, excavate the water pipe trench and the precast well trench to the design depth, and the height of the water pipe trench matches the height of the connecting cylinder on the precast well. S2. Hoist the precast well body to the precast well trench, place multiple pad rollers at intervals in the water pipe trench, and hoist the water pipe to the water pipe trench, placing the water pipe on the pad rollers. S3. A sealing connection assembly and a fixing and locking mechanism are installed on the two sides of the connecting cylinder of the precast well body, and the bolts are not fixed. S4. Pass the connecting ends of each water pipe through the protective sleeve, sealing ring plate and sealing sleeve in sequence and then insert them into the precast well, and fix and lock the bolts of the fixing and locking mechanism. S5. The top cover of the hoisting cylinder is placed on the upper part of the precast well body to complete the connection between the precast well and the water pipe.

8. The method for sealing and connecting pipes in a prefabricated well according to claim 7, characterized in that: A stepped trench is created between the water pipe trench and the prefabricated well trench.

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