A prefabricated mold for a faultless round inspection well and a construction process thereof

Abstract

The application relates to a prefabricated mold for a faultless round inspection well and a construction process, and belongs to the technical field of prefabricated concrete component forming molds. The prefabricated mold comprises a bottom frame, a plurality of shock absorbers are horizontally arranged in the bottom frame, a rubber pad is arranged on the top of the middle shock absorber, two groups of sliding grooves are arranged on the top of the front end of the bottom frame, a limiting frame is arranged around the top of the bottom frame, an arc-shaped groove is arranged on the top of the limiting frame, a limiting block one is arranged on the bottom of the arc-shaped groove, a locking assembly is arranged on the center of the top of the bottom frame. The two arc-shaped outer molds are precisely concentrically slid and closed through the sliding grooves, the movable oblique teeth are locked with the limiting oblique teeth, the radial deviation of the mold closing is avoided, the outer mold vertical displacement is locked through the pressing block pressed by the concrete self-weight, the linkage L-shaped rod and the spring one drive the back-shaped block to pull down the clamping plate, the outer mold vertical displacement is locked, and the oscillation and the outer mold floating and sinking in the pouring process are avoided.

Description

Technical Field

[0001] This invention relates to the field of precast concrete component molding mold technology, and in particular to a non-misaligned circular inspection well precast mold and construction process. Background Technology

[0002] With the large-scale advancement of urban rainwater and sewage separation, sponge city construction, and renovation of old pipe networks, precast circular concrete inspection wells have become a core supporting component of municipal drainage pipe networks due to their advantages such as fast construction speed, excellent seepage prevention performance, and minimal on-site pollution.

[0003] The forming accuracy and appearance quality of prefabricated inspection wells depend entirely on the matching mold structure. Currently, the mainstream in the industry is to use split-assembly circular inspection well steel molds, which are mainly composed of an inner mold, two or three arc-shaped outer molds, a simple base and a top sealing plate. Technical defects exposed during the mass prefabrication process will directly affect the qualification rate of the finished well body and the production efficiency of the prefabrication plant.

[0004] Traditional curved outer molds are often equipped with simple single pulleys and simple tracks at the bottom to achieve opening and closing sliding. Under long-term repeated friction and vibration impact, the pulleys and tracks are prone to problems such as wheel wear, loose wheel axles, and deformation of track grooves.

[0005] After the mold has been used dozens of times, the radial and vertical gaps of the pulleys continue to increase. During the mold closing process, it is difficult for the two arc-shaped outer molds on both sides to be precisely aligned along a unified concentric trajectory, resulting in slight offsets in the left and right and front and back.

[0006] Meanwhile, during the oscillation of the casting, the lack of limiting the overall frame amplifies the displacement of the template due to the oscillation wear gap, and the joints automatically stagger. This not only exacerbates the radial misalignment of the outer wall of the well, but also causes the concentricity of the inner and outer molds to be inaccurate, resulting in excessive deviation of the well wall thickness.

[0007] Meanwhile, worn pulleys are prone to jamming, and the resistance to mold disassembly and closure increases sharply. Manual external force is required to pry the template, which further damages the mold positioning benchmark, forming a vicious cycle and causing continuous deterioration of the consistency of well body dimensions in batches.

[0008] Therefore, this application provides a prefabricated mold and construction process for a non-misaligned circular inspection well to meet the requirements. Summary of the Invention

[0009] The technical problem to be solved by the present invention is to provide a non-misaligned circular inspection well prefabricated mold and construction process to solve the problems that the long-term wear of the sliding guide pulley of the existing prefabricated circular inspection well mold will continuously damage the positioning accuracy of the mold, and at the same time cause multiple pain points such as radial and vertical misalignment, oscillation displacement, grout leakage at the joints, and inefficient disassembly and transportation.

[0010] To solve the above-mentioned technical problems, the present invention provides the following technical solution: A precast mold for a circular inspection well without misalignment includes a base frame. Multiple sets of shock absorbers are horizontally installed inside the base frame. A rubber pad is installed on the top of the middle set of shock absorbers. Two sets of sliding grooves are formed at the front top of the base frame. Limiting frames are installed around the top of the base frame, with arc-shaped grooves on their tops and limiting blocks installed on both sides of the bottom of the arc-shaped grooves. A locking assembly is installed at the center of the top of the base frame to lock the mold. A casting assembly is installed on the outer wall of the locking assembly to cast the mold in conjunction with the locking assembly. A lifting limiting assembly is installed on the top of the casting assembly to move the mold as a whole.

[0011] Optionally, the locking assembly includes an inner mold, a base is mounted on the bottom outer wall of the inner mold, two sets of loop blocks are mounted on the top of the inner mold, an L-shaped rod is mounted on the bottom of the loop blocks, and a spring is mounted on the outer wall of the other end of the L-shaped rod.

[0012] Optionally, a pressing block is installed at the top of the other end of the L-shaped rod. The pressing block is slidably connected to the base. The pressing block can move down to pull the loop block down. A shock-absorbing column is installed at the bottom of the inner mold. The shock-absorbing column is located at the top of the rubber pad.

[0013] Optionally, the casting assembly includes a semi-circular outer mold located on the outer wall of the rear end of the inner mold, the bottom inner wall of the semi-circular outer mold contacting the outer wall of the base, arc-shaped outer molds installed on both sides of the front end of the semi-circular outer mold, and a clamping plate installed on the top inner wall of the arc-shaped outer mold.

[0014] Optionally, the card plate is inserted into the U-shaped block, and a traveling roller is installed at the bottom of the front end of the arc-shaped outer mold, with the traveling roller located in the slide groove.

[0015] Optionally, the front end of the arc-shaped outer mold on the left is equipped with multiple sets of movable helical teeth, and the front end of the arc-shaped outer mold on the right is equipped with multiple sets of box locks. Telescopic rods are installed on both sides of the inner wall of the box locks, and springs are installed on the outer wall of the telescopic rods.

[0016] Optionally, a limiting helical tooth is installed at the other end of the telescopic rod. The limiting helical tooth meshes with the movable rack. A pull ring is installed at the center of the limiting helical tooth. The pull ring is located outside the lock box. The tilting directions of each tooth of the movable helical tooth and the limiting helical tooth are opposite.

[0017] Optionally, the lifting and limiting assembly includes a support plate, a lifting ring is installed on the top of the support plate, and a leak-proof plate is installed on the bottom of the support plate.

[0018] Optionally, a swivel frame is installed on the four sides of the support plate, a rotating rod is installed at the bottom of the swivel frame, and two sets of limiting blocks are installed on the side wall of the rotating rod.

[0019] This application also provides another technical solution: a construction process for a prefabricated mold for a non-misaligned circular inspection well, the specific steps of which are as follows: S1. The hoisting locking assembly is placed in the center of the base frame, the shock-absorbing column presses the rubber pad, and the bottom shock absorption system is built by relying on the shock absorber. The slide and the limit frame form a concentric positioning reference. S2. Fix the semi-circular outer mold, and the two arc-shaped outer molds on both sides are closed along the slide groove by the walking roller. Pull the pull ring to compress the second spring. After closing, release the pull ring. The limiting helical tooth and the movable helical tooth mesh and lock to eliminate the misalignment and leakage of the joint. S3. When closing, the clamping plate is inserted into the U-shaped block. The concrete is poured and the pressing block is pressed down. The L-shaped rod compresses the spring and pulls the U-shaped block to lock the clamping plate firmly, restricting the upper and lower movement of the outer mold. S4. Lift and place the lifting and limiting components, seal the pouring port with the anti-leakage plate, insert the rotating rod into the arc groove, and lock the limiting block one and limiting block two to form an overall rigid frame; pour in layers and vibrate, the vibration is weakened by the bottom buffer, multiple constraints ensure that there are no misalignments in the molding, and lock and let it stand for curing. S5. Unlock the pull ring, slide to separate the arc-shaped outer mold and remove the semi-circular outer mold, lift away the lifting limit component and take out the well body; use the lifting ring to transfer the components; clean the mold, reset the spring and rack, and return the outer mold to its position for the next production.

[0020] Compared with the prior art, the present invention has at least the following beneficial effects: In the above solution, the two arc-shaped outer molds are precisely and concentrically slid together by sliding along the grooves, which allows the movable helical teeth and the limiting helical teeth to mesh and lock the joint, thus preventing radial displacement of the mold. By pressing down the pressing block with the self-weight of the poured concrete, the L-shaped rod and the spring together drive the loop block to pull down the clamping plate, thereby locking the vertical displacement of the outer mold and preventing vibration and floating or sinking of the outer mold during the pouring process. At the same time, the rotating rod of the top lifting and limiting component and the limiting frame of the base frame are engaged to form an integral rigid frame, so that the concentricity and relative height of the inner and outer molds remain constant throughout the pouring and curing process. This fundamentally solves the problems of radial and vertical misalignment and uneven wall thickness of the well wall and well opening after the traditional mold is formed, making the finished product have a neat appearance and meet the dimensional accuracy standards, and greatly improving the factory qualification rate of precast inspection wells.

[0021] By integrating multiple sets of shock absorbers into the base frame and combining the central rubber pad with the shock absorber column at the bottom of the inner mold, a composite shock absorption and buffer system is formed. This system allows the high-frequency vibrations generated during oscillation operations to be absorbed and attenuated step by step by multiple layers of elastic components, thereby significantly reducing the transmission of vibrations to the inner and outer molds and reducing the offset caused by mold shaking and gap expansion. At the same time, it avoids the micro-deformation of the mold caused by external site vibrations and the stress of the concrete's own weight. Even if the mold is used repeatedly for a long time, the positioning reference is not easy to fail, thereby extending the high-precision service life of the mold and improving the vicious cycle of guide wheel wear, track deformation, and continuous deterioration of positioning after repeated oscillation of traditional molds.

[0022] By using the rollers at the bottom of the arc-shaped outer mold to match the sliding grooves on the base frame, the sliding opening and closing of the arc-shaped outer mold has low resistance, eliminating the need for manual prying of the template and disruption of the positioning benchmark. By setting limiting teeth and movable racks, the movable rack automatically engages and locks with the limiting teeth when the two arc-shaped outer molds are fitted together. The lock's built-in spring and telescopic rod allow for one-button unlocking by pulling the outer ring, enabling a single person to complete the mold closing and locking operation, resulting in high construction efficiency. The rack engagement ensures a seamless fit between the joints, sealing the template joints, preventing concrete leakage and the formation of burrs and flash, reducing subsequent well body grinding and repair processes, and lowering labor and material costs. The lifting limit component ensures that the stress point during lifting is on the lifting limit component and the base frame connected to the limit frame, preventing excessive stress on the mold during lifting that could cause loosening, disintegration, or deformation due to component impact. Attached Figure Description

[0023] Figure 1 A schematic diagram of the overall structure of a prefabricated mold for a circular inspection well without misalignment. Figure 2 A schematic diagram of the disassembled structure of a prefabricated mold for a circular inspection well without misalignment. Figure 3 A schematic diagram showing the disassembled structure of the base frame, locking components, and casting components; Figure 4 This is a schematic diagram of the cross-sectional structure of the arc-shaped outer mold in its unclosed state; Figure 5 This is a schematic cross-sectional view of the movable helical tooth and the limiting helical tooth in the non-meshing state. Figure 6 This is a schematic diagram of the cross-sectional structure of the base frame and locking assembly; Figure 7 This is a schematic diagram of the split cross-sectional structure of the locking component; Figure 8 This is a schematic diagram of the cross-sectional structure of the base frame and the lifting and limiting components; Figure 9 for Figure 8 A partially enlarged structural diagram.

[0024] Figure label: 1. Base frame; 101. Shock absorber; 102. Rubber pad; 103. Slide groove; 104. Limiting frame; 105. Arc groove; 106. Limiting block one; 2. Locking assembly; 201. Inner mold; 202. Base; 203. U-shaped block; 204. L-shaped rod; 205. Spring one; 206. Pressing block; 207. Shock-absorbing column; 3. Casting assembly; 301. Semi-circular outer mold 302. Arc-shaped outer mold; 303. Clamping plate; 304. Traveling roller; 305. Movable helical gear; 306. Box lock; 307. Telescopic rod; 308. Spring II; 309. Limiting helical gear; 310. Pull ring; 4. Lifting limit assembly; 401. Support plate; 402. Lifting ring; 403. Leak-proof plate; 404. L-shaped frame; 405. Rotating rod; 406. Limiting block II. Detailed Implementation

[0025] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided below.

[0026] like Figures 1 to 9 As shown, an embodiment of the present invention provides a prefabricated mold for a circular inspection well without misalignment, including a base frame 1. Multiple sets of shock absorbers 101 are horizontally installed inside the base frame 1. A rubber pad 102 is installed on the top of the middle set of shock absorbers 101, forming a bottom composite buffer layer. Two sets of sliding grooves 103 are opened at the front end of the top of the base frame 1. The curvature of the sliding grooves 103 matches that of the outer mold of the circular inspection well, limiting the arc-shaped outer mold 302 to slide only along a concentric arc. Limiting frames 104 are installed around the top of the base frame 1. The top of the limiting frames 104... An arc-shaped groove 105 is provided, and limit blocks 106 are installed on both sides of the bottom of the arc-shaped groove 105 for later locking with the top lifting limit component 4 to achieve overall locking of the mold. A locking component 2 is installed at the top center of the base frame 1 to lock the mold. A casting component 3 is installed on the outer wall of the locking component 2 to cast the mold in conjunction with the locking component 2. A lifting limit component 4 is installed on the top of the casting component 3 to drive the overall movement of the mold.

[0027] like Figure 3 , Figure 6 and Figure 7As shown, the locking assembly 2 includes an inner mold 201. The locking assembly 2 performs the dual functions of vertically locking the outer mold and bottom shock absorption and buffering. A base 202 is installed on the bottom outer wall of the inner mold 201. Two sets of U-shaped blocks 203 are installed on the top of the inner mold 201. An L-shaped rod 204 is installed at the bottom of the U-shaped block 203. A spring 205 is installed on the outer wall of the other end of the L-shaped rod 204. A pressing block 206 is installed on the top of the other end of the L-shaped rod 204. The pressing block 206 is slidably connected to the base 202. When the pressing block 206 moves down, the L-shaped rod 204 can pull the U-shaped block 203 down. A shock-absorbing column 207 is installed at the bottom of the inner mold 201. The shock-absorbing column 207 is located on top of the rubber pad 102. The shock-absorbing column 207, the rubber pad 102, and the shock absorber 101 form a three-stage shock absorption system to absorb irregular high-frequency vibrations generated by oscillation and prevent the inner mold 201 from shifting.

[0028] In the empty formwork state, spring 205 pushes the L-shaped rod 204 upward, at which time the loop block 203 is in a high position and can be smoothly inserted into the clamping plate 303; after the concrete is poured, the concrete's own weight presses down on the pressing block 206, causing the pressing block 206 to drive the L-shaped rod 204 to compress the spring 205 downward, and simultaneously pull down the loop block 203, causing the loop block 203 to move down and hug the clamping plate 303, thereby locking the vertical displacement of the arc-shaped outer formwork 302 and preventing vertical misalignment caused by floating or sinking during pouring.

[0029] like Figures 3 to 5As shown, the casting component 3 includes a semi-circular outer mold 301, which is located on the outer wall of the rear end of the inner mold 201. The bottom inner wall of the semi-circular outer mold 301 is in contact with the outer wall of the base 202. Arc-shaped outer molds 302 are installed on both sides of the front end of the semi-circular outer mold 301. A clamping plate 303 is installed on the top inner wall of the arc-shaped outer mold 302. The clamping plate 303 is inserted into the U-shaped block 203. During the closing process of the two arc-shaped outer molds 302, the clamping plate 303 automatically inserts into the U-shaped block 203 at the top of the inner mold 201 to complete the upper and lower pre-positioning of the inner and outer molds. With the help of the concrete self-weight linkage locking mechanism, the vertical movement of the outer mold is doubly constrained. A traveling roller 304 is installed at the bottom of the front end of the arc-shaped outer mold 302. The traveling roller 304 is located in the slide groove 103, so that the traveling roller 304 can only close inward and separate outward along the concentric arc, ensuring that the inner and outer molds are strictly concentric after the mold is closed, eliminating radial offset and misalignment. The front end of the left arc-shaped outer mold 302 is installed with There are multiple sets of movable helical teeth 305. Multiple sets of box locks 306 are installed at the front end of the right-side arc-shaped outer mold 302. Telescopic rods 307 are installed on both sides of the inner wall of the box locks 306. Springs 308 are installed on the outer wall of the telescopic rods 307. A limiting helical tooth 309 is installed at the other end of the telescopic rod 307. The limiting helical tooth 309 meshes with the movable rack 305. A pull ring 310 is installed at the center of the limiting helical tooth 309, located outside the box locks 306. During molding, the two arc-shaped outer molds 302 slide inward until the joint is fitted; the limiting helical teeth 309 and the movable helical teeth 305 fully engage, rigidly locking the joint of the two arc-shaped outer molds 302, with no gaps between the joints, avoiding grout leakage and radial misalignment during pouring; when disassembling the mold, simply pull the pull ring 310 again, and the limiting helical teeth 309 disengage, allowing the arc-shaped outer molds 302 to slide outward and separate. The operation is simple and does not require prying the template with a pry bar, protecting the positioning reference of the slide groove 103.

[0030] like Figure 8 and Figure 9 As shown, the lifting and limiting assembly 4 includes a support plate 401. A lifting ring 402 is installed on the top of the support plate 401 for lifting and transporting the entire set of molds and the formed well body. A leak-proof plate 403 is installed at the bottom of the support plate 401. After the lifting and limiting assembly 4 is lowered, the leak-proof plate 403 completely seals the top pouring opening of the inner and outer molds to prevent vibration and concrete slurry overflow during the pouring process, and to ensure that the well opening end face is flat and free of burrs. A seven-shaped frame 404 is installed on the four sides of the support plate 401. A rotating rod 405 is installed at the bottom of the seven-shaped frame 404. Two sets of limiting blocks 406 are installed on the side wall of the rotating rod 405.

[0031] After the lifting and limiting component 4 is hoisted into place, the rotating rod 405 falls vertically into the arc-shaped groove 105 of the base frame limiting frame 104; then the rotating rod 405 is rotated so that the limiting blocks 406 on both sides of the rotating rod 405 and the limiting block 106 at the bottom of the arc-shaped groove 105 are locked together, locking the top lifting and limiting component 4, the middle pouring component 3, and the bottom base frame 1 into an integrated rigid frame; during the pouring and curing stages, the entire mold does not separate or deform slightly, thus preventing step misalignment of the well wall and well opening from the source.

[0032] This application also provides another technical solution: a construction process for a prefabricated mold for a non-misaligned circular inspection well, the specific steps of which are as follows: S1. The hoisting locking assembly 2 is placed in the center of the base frame 1. The shock absorber 207 presses the rubber pad 102 together. The bottom shock absorber system is constructed by relying on the shock absorber 101. The slide 103 and the limit frame 104 form a concentric positioning reference. S2. Fix the semi-circular outer mold 301, and the two arc-shaped outer molds 302 on both sides are closed along the slide groove 103 via the walking roller 304. Pull the pull ring 310 to compress the second spring 308. After closing, release the pull ring 310. The limiting helical tooth 309 engages with the movable helical tooth 305 to lock and eliminate the misalignment and leakage of the joint. S3. When closing, the clamping plate 303 is inserted into the loop block 203. When pouring concrete, the pressing block 206 is pressed down. The loop block 203 is pulled down by the L-shaped rod 204 and the spring 205. The clamping plate 303 is locked firmly, which restricts the upper and lower movement of the outer mold. S4. Lifting and limiting component 4, anti-leakage plate 403 to seal the pouring port, rotating rod 405 to be inserted into arc groove 105, limiting block one 106 and limiting block two 406 locked together to form an overall rigid frame; layered pouring and vibration, vibration is weakened by bottom buffer, multiple constraints ensure no misalignment in the forming, and lock and static curing. S5, unlock the pull ring 310, slide and separate the arc-shaped outer mold 302 and remove the semi-circular outer mold 301, lift off the lifting limit assembly 4 and take out the well body; use the lifting ring 402 to transfer the components; clean the mold, reset the spring and rack, and return the outer mold to its position to prepare for the next production.

[0033] The working principle of the technical solution provided by this invention is as follows: Before operation, the locking assembly 2 is hoisted and placed in the center area of ​​the base frame 1, so that the bottom shock-absorbing column 207 of the inner mold 201 is precisely pressed on the center rubber pad 102; the two sliding grooves 103 are arranged along the arc to provide a guide track for the subsequent sliding of the arc-shaped outer mold 302, so as to establish a fixed concentric benchmark, form a shock-absorbing buffer system in advance, avoid mold displacement caused by subsequent oscillation process, and eliminate the radial and vertical misalignment of the well body from the bottom.

[0034] Subsequently, the semi-circular outer mold 301 is fixed to the rear side of the inner mold 201 as the main body for shaping the rear end of the outer mold; the traveling rollers 304 at the bottom of the two arc-shaped outer molds 302 are embedded in the sliding grooves 103 on the base frame 1 and slide smoothly inward along the sliding grooves 103. The two arc-shaped outer molds 302 are brought together towards the center and spliced ​​with the rear semi-circular outer mold 301 to form a complete annular casting cavity.

[0035] After the two arc-shaped outer molds 302 are fully fitted, since the movable helical teeth 305 and the limiting helical teeth 309 are inclined in opposite directions, when the mold is closed, the movable helical teeth 305 pushes the limiting helical teeth 309 backward, and the elastic force of the compression spring 308 makes each locking tooth smoothly engage. Since the locking teeth are inclined in opposite directions, each pair of corresponding locking teeth forms a lock, so that the limiting helical teeth 309 and the opposite movable helical teeth 305 are tightly engaged, realizing the rigid locking of the arc-shaped outer mold 302 joint without gaps, and preventing grout leakage and joint misalignment during pouring.

[0036] As the two arc-shaped outer molds 302 close towards the center, the top plate 303 of the arc-shaped outer mold 302 is obliquely inserted into the U-shaped block 203 at the top of the inner mold 201, completing the initial vertical locking of the inner and outer molds, locking the relative positions of the inner and outer molds, and preventing the outer molds from floating or sinking during pouring, thus preventing misalignment of the well body.

[0037] Subsequently, concrete is poured in layers into the annular cavity formed by the inner and outer molds. The concrete presses down on the pressing block 206 on the base 202, causing the pressing block 206 to slide vertically along the base 202, pulling the L-shaped rod 204 down and compressing the spring 205, which drives the two sets of U-shaped blocks 203 at the top of the inner mold 201 to descend synchronously, completely locking the clamping plate 303 and preventing the two arc-shaped outer molds 302 from moving up and down.

[0038] Simultaneously with the pouring of concrete, vibration operations are carried out. The high-frequency vibration generated by the vibration is transmitted downward to the base frame 1, and is absorbed and buffered step by step by the shock absorber 101, rubber pad 102, and shock absorber column 207 to reduce the displacement of the mold caused by the vibration. The side rack meshing locking structure and the top loop block 203 plug-in structure play a dual constraint role at the same time, limiting the slippage, floating, and opening deformation of the outer mold, so that there is no deviation in the distance between the inner and outer molds and the vertical height during the pouring and forming process. After the forming, the inner wall, outer wall, and wellhead end face of the inspection well are free of steps and misalignments, and the joints are flat without any unevenness or defects.

[0039] After the pouring is completed, the lifting and limiting component 4 is lowered to the top of the mold by the lifting ring 402. The bottom anti-leakage plate 403 of the support plate 401 completely covers the pouring opening at the top of the inner and outer molds, sealing the gap at the top of the cavity, preventing the grout from overflowing during concrete pouring and vibration, and ensuring the flatness of the wellhead end face. At the same time, during the hoisting, the lifting ring 402 can ensure that the center of gravity is kept in the center when the device is lifted and moved, avoiding the overall tilting of the device.

[0040] The support plate 401 is surrounded by a seven-shaped frame 404 that extends downwards. The bottom rotating rod 405 is embedded in the arc-shaped groove 105 of the limiting frame 104. Then, the rotating rod 405 is rotated so that the limiting blocks 406 on both sides of the rotating rod 405 and the limiting block 106 at the bottom of the arc-shaped groove 105 engage with each other, connecting the top lifting limiting component 4, the middle casting cavity, and the bottom base frame 1 into an integrated rigid frame. After the overall frame is formed, the mold forms multiple constraints in both the radial and vertical directions. The concentricity and relative height of the inner and outer molds remain constant throughout the casting process, thus structurally preventing misalignment of the well wall and well opening.

[0041] At the same time, the entire integrated mold is kept locked and statically cured. The overall rigid frame continuously restrains the deformation of the mold, avoiding slight displacement of the mold caused by the self-weight and shrinkage stress of the concrete during the curing stage. The bottom shock-absorbing and buffering structure can offset the disturbance of the mold caused by slight vibration of the site, ensuring the stability of the dimensional accuracy of the precast inspection well.

[0042] In addition, when disassembling the mold, pull the outer ring 310 of the box lock 306 to compress the second spring 308 so that the limiting helical tooth 309 and the movable helical tooth 305 are disengaged, and the side locking of the two arc-shaped outer molds 302 is released; the two arc-shaped outer molds 302 are slid outward along the slide groove 103 to separate and detach from the outer wall of the prefabricated inspection well, and then the rear semi-circular outer mold 301 is removed to complete the outer mold disassembly; then the lifting limiting component 4 is hoisted and separated from the inner mold 201, and the prefabricated circular inspection well component without misalignment is fully exposed.

[0043] In addition, when transfer is required, the entire mold or the prefabricated manhole component can be lifted by lifting ring 402 to complete the transfer of components; at the same time, the stress point during the lifting process is on the base frame 1 connected to the lifting limit component 4 and the limit frame 104. The base frame 1 has a load-bearing function and will not directly act on the mold. The limit structure of the seven-shaped frame 404 and the rotating rod 405 can prevent the mold from being loosened and disintegrated due to excessive force during the lifting process or the deformation caused by component collision.

[0044] After the transfer is completed, clean the residual concrete inside the mold, reset all elastic components (spring 1 205, spring 2 308, movable helical tooth 305), and then slide the arc-shaped outer mold 302 to the initial position to restore the mold to the initial production state and enter the next round of prefabrication construction cycle.

[0045] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A prefabricated mold for a circular inspection well without misalignment, characterized in that, Includes a base frame (1), inside which multiple sets of shock absorbers (101) are horizontally installed. A rubber pad (102) is installed on the top of the middle set of shock absorbers (101). Two sets of sliding grooves (103) are opened at the front end of the top of the base frame (1). Limiting frames (104) are installed around the top of the base frame (1). An arc-shaped groove (105) is opened on the top of the limiting frame (104). Limiting blocks (106) are installed on both sides of the bottom of the arc-shaped groove (105). A locking assembly (2) is installed at the top center of the base frame (1), and the locking assembly (2) is used to lock the mold; The locking assembly (2) is equipped with a casting assembly (3) on its outer wall. The casting assembly (3) is used to cooperate with the locking assembly (2) to cast molds. The top of the casting component (3) is equipped with a lifting and limiting component (4), which is used to drive the mold to move as a whole.

2. The prefabricated mold for a circular inspection well without misalignment according to claim 1, characterized in that, The locking assembly (2) includes an inner mold (201), a base (202) is installed on the bottom outer wall of the inner mold (201), two sets of loop blocks (203) are installed on the top of the inner mold (201), an L-shaped rod (204) is installed at the bottom of the loop block (203), and a spring (205) is installed on the outer wall of the other end of the L-shaped rod (204).

3. The prefabricated mold for a circular inspection well without misalignment according to claim 2, characterized in that, A pressing block (206) is installed at the top of the other end of the L-shaped rod (204). The pressing block (206) is slidably connected to the base (202). The pressing block (206) can move down to pull the loop block (203) down by the L-shaped rod (204). A shock-absorbing column (207) is installed at the bottom of the inner mold (201). The shock-absorbing column (207) is located on top of the rubber pad (102).

4. The prefabricated mold for a circular inspection well without misalignment according to claim 1, characterized in that, The casting component (3) includes a semi-circular outer mold (301), which is located on the outer wall of the rear end of the inner mold (201). The bottom inner wall of the semi-circular outer mold (301) is in contact with the outer wall of the base (202). Arc-shaped outer molds (302) are installed on both sides of the front end of the semi-circular outer mold (301), and a clamping plate (303) is installed on the top inner wall of the arc-shaped outer mold (302).

5. The prefabricated mold for a circular inspection well without misalignment according to claim 4, characterized in that, The card plate (303) is inserted into the loop block (203), and a walking roller (304) is installed at the bottom front end of the arc-shaped outer mold (302). The walking roller (304) is located in the slide groove (103).

6. The prefabricated mold for a circular inspection well without misalignment according to claim 5, characterized in that, The front end of the arc-shaped outer mold (302) on the left is equipped with multiple sets of movable helical teeth (305), and the front end of the arc-shaped outer mold (302) on the right is equipped with multiple sets of box locks (306). The inner walls of the box locks (306) are equipped with telescopic rods (307), and the outer walls of the telescopic rods (307) are equipped with springs (308).

7. The prefabricated mold for a circular inspection well without misalignment according to claim 6, characterized in that, The telescopic rod (307) is equipped with a limiting helical tooth (309) at the other end. The limiting helical tooth (309) is engaged with the movable rack (305). A pull ring (310) is installed at the center of the limiting helical tooth (309). The pull ring (310) is located outside the lock box (306). The movable helical tooth (305) and the limiting helical tooth (309) are inclined in opposite directions.

8. The prefabricated mold for a circular inspection well without misalignment according to claim 1, characterized in that, The lifting limit assembly (4) includes a support plate (401), a lifting ring (402) is installed on the top of the support plate (401), and a leak-proof plate (403) is installed on the bottom of the support plate (401).

9. The prefabricated mold for a circular inspection well without misalignment according to claim 8, characterized in that, The support plate (401) is equipped with a seven-shaped frame (404) on its four sides, and a rotating rod (405) is installed at the bottom of the seven-shaped frame (404). Two sets of limiting blocks (406) are installed on the side wall of the rotating rod (405).

10. A construction process for a non-misaligned circular inspection well prefabrication mold, applicable to the non-misaligned circular inspection well prefabrication mold as described in claim 9, characterized in that, The process includes the following steps: S1. The hoisting locking assembly (2) is placed in the center of the base frame (1), the shock absorber column (207) presses the rubber pad (102), and the bottom shock absorber system is constructed by relying on the shock absorber (101). The slide groove (103) and the limit frame (104) form a concentric positioning reference. S2. Fix the semi-circular outer mold (301), and the two arc-shaped outer molds (302) are closed along the slide groove (103) by the walking roller (304). Pull the pull ring (310) to compress the second spring (308). After closing, release the pull ring (310), and the limiting helical tooth (309) engages with the movable helical tooth (305) to lock and eliminate the misalignment and leakage of the joint. S3. When closing, the clamping plate (303) is inserted into the loop block (203), and the concrete is poured to press down the pressing block (206). The loop block (203) is pulled down by the L-shaped rod (204) and the spring (205), which firmly locks the clamping plate (303) and restricts the upper and lower movement of the outer mold. S4. Lifting and setting up the lifting limit component (4), sealing the pouring port with the anti-leakage plate (403), inserting the rotating rod (405) into the arc groove (105), locking the first limit block (106) and the second limit block (406) together to form an overall rigid frame; pouring and vibrating in layers, the vibration is weakened by the bottom buffer, multiple constraints ensure that there are no misalignments in the molding, and locking and static curing; S5. Unlock the pull ring (310), slide and separate the arc-shaped outer mold (302) and remove the semi-circular outer mold (301), lift off the lifting limit assembly (4) and take out the well body; use the lifting ring (402) to transfer the components; clean the mold, reset the spring and rack, and put the outer mold back in place to prepare for the next production.

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