A lifting and demolding mechanism for steel molds of rainwater wells

Abstract

This utility model discloses a lifting and demolding mechanism for a steel mold of a rainwater well, including a mounting support fixedly installed on the ground; a connecting seat fixedly connected to the upper end face of the mounting support, and a mold core provided on the connecting seat. The mold core is a hollow cylindrical steel component, and a wedge-shaped limiting plate is fixedly connected to the bottom outer edge of the mold core. A sealing element is provided on the outer periphery of the limiting plate; a lifting mechanism including at least one hydraulic cylinder fixed to the connecting seat. The beneficial effects of this utility model are: solving the technical problems of the existing mold demolding method being relatively simple, relying on manually cranking the lifting machine to demold the core, which easily causes slurry leakage at the gap between the core and the molding device during demolding, resulting in mold jamming, low mold usability, time-consuming and labor-intensive production, increased product scrap rate, and damage to mold precision.

Description

Technical Field

[0001] This utility model relates to the technical field of demolding mechanisms, specifically to a lifting and demolding mechanism for a steel mold of a rainwater well. Background Technology

[0002] Stormwater wells are key structures in urban stormwater drainage systems, mainly used to collect and transport surface runoff stormwater. They are usually set up in roadside ditches, intersections, or low-lying areas, serving as transitional nodes connecting stormwater inlets, branch pipes, and main drainage pipes. They play an important role in ensuring urban flood control capacity and promoting the construction of sponge cities.

[0003] Chinese utility model patent CN222387219U discloses an "easy-to-demold testing well casting mold," which adopts an inner core lifting structure. The inner core is driven upward by a manually cranked lifting machine to separate it from the solidified well body. Although this solution simplifies the demolding operation to some extent, the mating surface between the inner core and the outer mold is usually flat and lacks effective sealing measures. When pouring highly fluid resin concrete, the slurry is very easy to seep out from the contact gap between the two, forming slurry leakage. After the leaked slurry solidifies, it adheres to the moving interface, not only contaminating the mold but also causing mechanical interference during subsequent demolding. At the same time, because the resin concrete tightly wraps the surface of the inner core during the curing process, coupled with the filling effect of the slurry leakage residue, it is very easy to generate great frictional resistance between the inner core and the product, and even mechanical seizing. At this time, the output force of the manually operated lifting machine is limited and it is difficult to overcome the demolding resistance, causing the inner core to get stuck and unable to rise normally. Once demolding fails, on-site operators are often forced to use violent means such as pry bars and hammers to forcibly dismantle the mold. Such operations not only easily cause rainwater well products to crack, chip, or even be scrapped, but also cause irreversible damage to the geometric accuracy and surface finish of the mold core, greatly reducing the number of times the mold can be reused and increasing production costs and maintenance burden. Utility Model Content

[0004] The purpose of this utility model is to overcome the above-mentioned technical deficiencies and provide a lifting and demolding mechanism for steel molds of rainwater wells. This solves the technical problems of the existing mold demolding methods being relatively simple, where the inner core is demolded by manually cranking the lifting machine. During demolding, the gap between the inner core and the molding device is prone to leakage, causing the mold to jam. This results in low mold ease of use, time-consuming and labor-intensive production, increased product scrap rate, and damage to the precision of the mold.

[0005] To achieve the above-mentioned technical objectives, the present invention adopts the following technical solution:

[0006] In a first aspect, this utility model provides a lifting and demolding mechanism for a steel mold of a rainwater well, comprising:

[0007] The mounting bracket is fixedly installed on the ground;

[0008] A connecting seat is fixedly connected to the upper end face of the mounting support, and the connecting seat is provided with a mold core. The mold core is a hollow cylindrical steel component. A wedge-shaped limiting plate is fixedly connected to the bottom outer edge of the mold core, and a sealing element is provided on the outer periphery of the limiting plate.

[0009] The lifting mechanism includes at least one hydraulic cylinder, which is fixed to the connecting seat and the telescopic end of the hydraulic cylinder is connected to the movable base. The movable base is sleeved under the outer periphery of the mold core and can move up and down along the axial direction of the mold core under the drive of the hydraulic cylinder.

[0010] In some embodiments, the mounting bracket includes a first I-beam, a second I-beam, and a bracket body. The first I-beam and the second I-beam are arranged parallel to each other on the ground, and the upper ends of the first I-beam and the second I-beam are connected to the bracket body.

[0011] In some embodiments, the outer periphery of the support body is provided with four grooves, and the four grooves form four support apex corners and are used to support the connecting seat.

[0012] In some embodiments, a plurality of support plates are provided between the inner wall of the connecting seat and the support body, and the upper end of the connecting seat is fixedly connected to the mold core.

[0013] In some embodiments, the outer periphery of the support body is provided with a plurality of lugs.

[0014] In some embodiments, the number of hydraulic cylinders is at least four, and the telescopic end of any one of the hydraulic cylinders is fixedly connected to the movable base via a connecting plate.

[0015] In some embodiments, the sealing element is a sealing ring, and a sealing ring is provided between the connecting surfaces of the limiting plate and the movable base.

[0016] Compared with existing technologies, this utility model provides a lifting and demolding mechanism for a steel mold of a rainwater well. By installing a hydraulic cylinder on the connecting seat, the movable base is directly driven to move up and down along the axial direction of the mold's inner core, replacing the traditional method of manually cranking the lifting mechanism. Operators only need to control the start and stop of the hydraulic system to complete the entire demolding process, saving time and effort. A wedge-shaped limiting plate is fixed to the outer edge of the bottom of the mold's inner core, and the movable base fits tightly against it in the mold-closed state. The contact surface between the two forms an oblique pressing structure, thereby ensuring the molding quality of the rainwater well product. Because the mold's inner core remains fixed throughout the entire molding and demolding process, the demolding action... The movable base drives the solidified rainwater well to detach from the inner core, thus eliminating the risk of jamming and seizing caused by friction, encapsulation, and slurry leakage during solidification. The demolding process is smooth and controllable, requiring no destructive methods such as prying or hammering, effectively preventing product cracking and damage, and significantly improving the yield. The cooperative structure of the movable base and the wedge-shaped limiting plate has both sealing and limiting functions. On the one hand, it prevents slurry intrusion and reduces wear; on the other hand, it provides a mechanical stop at the end of the demolding stroke to avoid impact damage caused by excessive travel of the hydraulic cylinder. At the same time, fixing the inner core avoids guide wear and deformation caused by repeated lifting and lowering. The overall structure has strong stability and the durability of the mold is greatly improved. Attached Figure Description

[0017] Figure 1 This is a three-dimensional schematic diagram of the lifting and demolding mechanism for the steel mold of the rainwater well provided in this embodiment of the utility model;

[0018] Figure 2 This is a schematic diagram of the groove of the lifting and demolding mechanism for the steel mold of the rainwater well provided in this embodiment of the utility model;

[0019] Figure 3 This is a bottom view of the lifting and demolding mechanism for the steel mold of the rainwater well provided in this embodiment of the utility model;

[0020] Figure 4 This utility model provides a lifting and demolding mechanism for a steel mold used for rainwater wells. Figure 3 Enlarged view of point A in the middle;

[0021] Figure 5 This is a schematic diagram of the installation support structure of the lifting and demolding mechanism for the steel mold of the rainwater well provided in this embodiment of the utility model;

[0022] Figure 6 This is a schematic diagram of the mounting support and mold core assembly of the lifting and demolding mechanism for the steel mold of the rainwater well provided in this embodiment of the utility model;

[0023] Figure 7 The rainwater well steel mold lifting and demolding mechanism provided in this embodiment of the utility model Figure 6 Enlarged diagram of point B.

[0024] Explanation of reference numerals in the attached drawings: 1. Mounting support; 11. First I-beam; 12. Second I-beam; 13. Support body; 131. Groove; 1311. Support apex; 14. Lifting lug; 2. Connecting seat; 21. Support plate; 3. Lifting mechanism; 31. Hydraulic cylinder; 311. Connecting plate; 4. Movable base; 5. Mold core; 51. Limiting plate; 52. Sealing ring. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0026] Please see Figure 1 , Figure 1 This is a schematic diagram of the structure of a lifting and demolding mechanism for a steel mold of a rainwater well, according to one embodiment of the present invention. The mechanism includes:

[0027] Mounting support 1 is fixedly installed on the ground;

[0028] The connecting seat 2 is fixedly connected to the upper end face of the mounting support 1, and the connecting seat 2 is provided with a mold core 5. The mold core 5 is a hollow cylindrical steel component. A wedge-shaped limiting plate 51 is fixedly connected to the bottom outer edge of the mold core 5, and a sealing element is provided on the outer periphery of the limiting plate 51.

[0029] The lifting mechanism 3 includes at least one hydraulic cylinder 31, which is fixed on the connecting seat 2. The telescopic end of the hydraulic cylinder 31 is connected to the movable base 4. The movable base 4 is sleeved on the lower outer periphery of the mold core 5 and can move up and down along the axial direction of the mold core 5 under the drive of the hydraulic cylinder 31.

[0030] In this embodiment, by setting a hydraulic cylinder 31 on the connecting seat 2, the movable base 4 is directly driven to move up and down along the axial direction of the mold core 5, replacing the traditional method of relying on manual cranking of the lifting machine. The operator only needs to control the start and stop of the hydraulic system to complete the entire demolding process, saving time and effort. A wedge-shaped limiting plate 51 is fixedly provided on the bottom outer edge of the mold core 5, and the movable base 4 fits tightly against it in the mold-closed state. The contact surface of the two forms an oblique pressing structure, thereby ensuring the molding quality of the rainwater well product. Since the mold core 5 always maintains its position throughout the entire molding and demolding process, The mold remains stationary while the movable base 4 drives the solidified rainwater well to detach from the inner core, eliminating the risk of jamming and seizing caused by friction, encapsulation, and slurry leakage during solidification. The demolding process is smooth and controllable, requiring no prying or other destructive methods, effectively preventing product cracking and damage, and significantly improving the yield. The cooperative structure of the movable base 4 and the wedge-shaped limiting plate 51 has both sealing and limiting functions. On the one hand, it prevents slurry from seeping in and reduces wear; on the other hand, it provides a mechanical stop at the end of the demolding stroke to avoid impact damage caused by overtravel of the hydraulic cylinder 31. At the same time, the fixed inner core avoids guide wear and deformation caused by repeated lifting and lowering, resulting in strong overall structural stability and significantly improved mold durability.

[0031] In one embodiment, please refer to Figure 1 - Figure 4 To improve the stability of the mounting support 1, the mounting support 1 includes a first I-beam 11, a second I-beam 12, and a support body 13. The first I-beam 11 and the second I-beam 12 are arranged parallel to each other on the ground, and the upper ends of the first I-beam 11 and the second I-beam 12 are connected to the support body 13. The outer periphery of the support body 13 is provided with four grooves 131, and the four grooves 131 form four supporting apex corners 1311, which are used to support the connecting seat 2. Multiple support plates 21 are provided between the connecting seat 2 and the inner wall of the support body 13, and the upper end of the connecting seat 2 is fixedly connected to the mold core 5. Multiple lifting lugs 14 are provided on the outer periphery of the support body 13.

[0032] In this embodiment, the first I-beam 11 and the second I-beam 12 are laid parallel to each other on the ground, forming two high-strength longitudinal load-bearing beams. The support body 13 is erected on the two I-beams, forming a stable rigid platform. This prevents the mold from tilting or vibrating due to uneven ground or local settlement, ensuring a smooth and precise demolding process. The four grooves 131 on the outer periphery of the support body 13 form four supporting apexes 1311 in space, which perfectly match the bottom contour of the connecting seat 2. This evenly transmits the vertical load borne by the connecting seat 2 to the support body 13 and the I-beams below through the four apexes, avoiding local stress concentration, preventing deformation of the connecting seat 2, and improving the overall structural durability. Multiple support plates 21 are added between the connecting seat 2 and the inner wall of the support body 13 to form a reinforced structure, which improves the connection rigidity between the two and effectively resists the horizontal component force or lateral displacement caused by the hydraulic cylinder 31 during demolding. This prevents the connecting seat 2 from shaking or deflecting, thereby ensuring the coaxiality between the movable base 4 and the mold core 5 and avoiding leakage or jamming caused by misalignment. Multiple lifting lugs 14 are provided on the outer periphery of the support body 13 to provide a standardized lifting interface for the entire mold. After prefabrication in the factory, it can be lifted to the curing area or loaded onto a vehicle for transportation in one go by a crane, which improves the equipment turnover efficiency and is especially suitable for multi-station assembly lines or mobile prefabrication operation scenarios.

[0033] In one embodiment, please refer to Figure 1 - Figure 5 To further improve the sealing performance of the equipment, the number of hydraulic cylinders 31 is at least four, and the extension end of any one of the hydraulic cylinders 31 is fixedly connected to the movable base 4 through the connecting plate 311. The sealing element is a sealing ring 52, and a sealing ring 52 is provided between the connecting surface of the limiting plate 51 and the movable base 4.

[0034] In this embodiment, four hydraulic cylinders 31 are arranged in a rectangular pattern. This ensures that the movable base 4 is subjected to uniform force and moves synchronously during lifting or lowering. This effectively prevents the base from tilting, warping, or experiencing excessive local force due to single-point or double-point driving, thereby avoiding scraping, jamming, or sealing failure between the movable base 4 and the mold core 5. This ensures smooth demolding and accurate repeatability. Resin concrete rainwater well products are heavy and still have a certain degree of fluidity before complete curing, requiring high thrust and stability from the demolding mechanism. The coordinated work of multiple hydraulic cylinders 31 not only significantly improves the overall lifting force but also distributes the load, reduces the workload of individual cylinders, reduces the failure rate, and extends the service life of the hydraulic system. This is particularly suitable for the production of heavy precast components with large diameters and heights. Each hydraulic cylinder... The telescopic end of 31 is fixed to the movable base 4 via the connecting plate 311. The connecting plate 311 is made of high-strength steel plate and has good shear and bending resistance. Its function is not only a mechanical connector, but also a force transmission medium to ensure that the thrust output by the hydraulic cylinder is transmitted to the movable base 4 efficiently and without loss, avoiding stroke error or action delay caused by loose connection or deformation. An elastic sealing ring 52 is set on the mating surface of the wedge-shaped limiting plate 51 and the movable base 4. When the movable base 4 falls back to the mold closing position under the drive of the hydraulic cylinder, the wedge-shaped inclined structure will automatically apply radial clamping force to the sealing ring 52, so that it tightly fills the contact gap, which can effectively block the leakage path of resin concrete slurry during high-pressure pouring, and completely solve the problems of rough edges, surface defects and subsequent mold jamming caused by slurry leakage in traditional molds.

[0035] To better understand this utility model, the following is combined with... Figures 1 to 7The technical solution of this utility model is described in detail as follows: Using a lifting device, the entire mold is hoisted to the prefabrication production station via the lifting lugs 14 located on the outer periphery of the support body 13. The first I-beam 11 and the second I-beam 12 are placed stably on the hardened ground, ensuring that the two I-beams are parallel and horizontal. The hydraulic system is activated, controlling the four hydraulic cylinders 31 to retract synchronously, driving the movable base 4 to move downwards along the axial direction of the mold core 5. When the movable base 4 descends to its lowest position, its upper surface and the bottom of the mold core 5 are aligned. The molded cavity of the rainwater well is formed by the surrounding structure. At this point, the inner edge of the movable base 4 is tightly fitted with the inclined surface of the wedge-shaped limiting plate 51. Under the action of pre-tightening force, the sealing ring 52 is radially compressed to form a reliable seal. The prepared resin concrete slurry is slowly injected into the molding cavity from the top of the mold. During the pouring process, because the sealing ring 52 has been pressed by the wedge surface, the slurry cannot seep out from the gap between the movable base 4 and the inner core, ensuring that the bottom of the product is flat and free of burrs. After pouring, the product is left to stand or cured at room temperature / accelerated under a temperature-controlled environment. During the curing process, the inner core 5 of the mold remains fixed to prevent stress concentration or deformation of the product due to core movement. Once the resin concrete reaches its demolding strength, typically 2–6 hours, the demolding stage begins. The hydraulic station is activated to simultaneously supply oil to the four hydraulic cylinders 31, causing the piston rods to extend synchronously. Each cylinder transmits thrust to the movable base 4 via a high-strength connecting plate 311, pushing it and the cured rainwater well product upwards. Driven by the movable base 4, the product smoothly detaches from the fixed mold. The inner core 5 completes demolding. When the movable base 4 rises to the end of its stroke, its inner edge is mechanically blocked by the inclined surface of the wedge-shaped limiting plate 51, automatically stopping to prevent the hydraulic cylinder from over-stroke and causing impact. After demolding, the operator removes the rainwater well product, controls the hydraulic system to depressurize, the cylinder piston rod retracts, and drives the movable base 4 to automatically fall back to the mold closing position. The movable base 4 is once again attached to the wedge-shaped limiting plate 51, the sealing ring 52 resets and tightens, the mold returns to the pouring state, the mold surface is cleaned of residue, and the next round of pouring can begin.

[0036] The specific embodiments of this utility model described above do not constitute a limitation on the scope of protection of this utility model. Any other corresponding changes and modifications made based on the technical concept of this utility model should be included within the scope of protection of the claims of this utility model.

Claims

1. A steel mold jacking and stripping mechanism for a storm water well, characterized by, include: The mounting bracket is fixedly installed on the ground; A connecting seat is fixedly connected to the upper end face of the mounting support, and the connecting seat is provided with a mold core. The mold core is a hollow cylindrical steel component. A wedge-shaped limiting plate is fixedly connected to the bottom outer edge of the mold core, and a sealing element is provided on the outer periphery of the limiting plate. The lifting mechanism includes at least one hydraulic cylinder, which is fixed to the connecting seat and the telescopic end of the hydraulic cylinder is connected to the movable base. The movable base is sleeved under the outer periphery of the mold core and can move up and down along the axial direction of the mold core under the drive of the hydraulic cylinder.

2. A steel mould jacking stripping mechanism for a stormwater well according to claim 1, characterised in that: The mounting bracket includes a first I-beam, a second I-beam, and a bracket body. The first I-beam and the second I-beam are arranged parallel to each other on the ground, and the upper ends of the first I-beam and the second I-beam are connected to the bracket body.

3. A steel mould jacking stripping mechanism for a stormwater well according to claim 2, characterised in that: The outer periphery of the support body has four grooves, which form four support apex corners and are used to support the connecting seat.

4. The steel mold jacking and stripping mechanism of a storm water well according to claim 3, characterized in that: Multiple support plates are provided between the inner wall of the connecting seat and the support body, and the upper end of the connecting seat is fixedly connected to the mold core.

5. A steel mould jacking stripping mechanism for a stormwater well according to claim 4, characterised in that: The outer periphery of the support body is provided with multiple lifting lugs.

6. A steel mould jacking stripping mechanism for a stormwater well according to claim 1 characterised in that: The number of hydraulic cylinders is at least four, and the telescopic end of any one of the hydraulic cylinders is fixedly connected to the movable base through a connecting plate.

7. A steel mould jacking stripping mechanism for a stormwater well according to claim 1 characterised in that: The sealing element is a sealing ring, and a sealing ring is provided between the connecting surfaces of the limiting plate and the movable base.

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