Mechanical bearing device and method for self-adaptive closed cavity

Abstract

The invention provides a self-adaptive sealed cavity mechanical bearing device and method.The device comprises a supporting structure and a mechanical anchoring structure, the supporting structure comprises a transversely-arranged supporting rod and a vertically-arranged in-place rod, the mechanical anchoring structure comprises a main rod, the upper end of the main rod is in threaded connection with the lower end of the in-place rod, and a fixing head is fixed to the lower end of the main rod; the main rod is sleeved with a sliding sleeve, expansion rods and lower supporting rods are evenly distributed outside the sliding sleeve and the fixing head respectively, the upper ends of the expansion rods are rotationally connected with the sliding sleeve, the lower ends of the expansion rods are of a pointed-end structure, the lower ends of the lower supporting rods are rotationally connected with the fixing head, and the upper ends of the lower supporting rods are rotationally connected with the lower sections of the expansion rods through rotary connecting parts. An eccentric gravity lock is arranged on the sliding sleeve, and a bearing piece used for bearing concrete is arranged on the expansion rod. The anchoring and fixing device can be anchored and fixed to a wall, the fixing effect can be further enhanced through the gravity effect of poured concrete, the steel bar support can be recycled during placement, high efficiency is achieved, materials are saved, and the green construction effect is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of building construction, and in particular to a mechanical supporting device and method for an adaptive closed cavity. Background Art

[0002] Sealing the cavity of precast cast-in-place piles is a critical process in the construction industry. Its purpose is to create a concrete seal within the pile body that provides a certain degree of strength and reliable waterproofing. The current common sealing method typically involves using three rebars with a diameter of at least 14 mm, welded to these with circular steel plates to form a support structure, and then lowering this assembly from the top of the cavity into the desired position. However, this process has several significant drawbacks: 1. Serious material waste: Since the rebar is long and permanently buried in the concrete, it cannot be recycled or reused, resulting in high steel consumption; 2. Low construction efficiency: welding operations rely on manual operation, the process is cumbersome and time-consuming, affecting the overall construction progress; 3. High customization cost: Sealing pallets need to be individually cut and cut according to the specific diameter of the pile cavity, which lacks versatility and increases material and management costs; 4. Poor adaptability: Different pile diameters require re-making matching support plates, which is not conducive to standardized construction and also increases the complexity of project management.

[0003] In summary, the existing cavity sealing technology needs to be improved in terms of economy, construction efficiency and resource sustainability. Summary of the Invention

[0004] To solve the above problems, the present invention discloses a mechanical support device and method for an adaptive closed cavity, wherein the device can be anchored and fixed to the wall, and the fixing effect can be further enhanced by the gravity effect of pouring concrete. The steel support during placement can be recycled, which is efficient and saves materials, achieving a green construction effect.

[0005] The specific plan is as follows: The axle up and down groove at two ends embeds respectively in two guide rails up and down of being made up of the groove on the attachment piece, and the tooth on the attachment piece is meshed with tooth on upper sprocket wheel, the lower sprocket. The tooth on the attachment piece is meshed with tooth on upper sprocket.

[0006] Furthermore, the upper end of the positioning rod is fixed to the middle of the support rod, and the support rod is used to support the circular cavity mouth. The positioning rod is used to fix the lower mechanical anchoring structure to the required position. After fixation, the support rod is rotated to disengage the positioning rod from the threaded sleeve.

[0007] Furthermore, the eccentric gravity lock is rotatably mounted inwardly within the upper end of the sliding sleeve, which is provided with an eccentric mixing gear. The upper section of the main rod is provided with one-way serrations that mate with the eccentric mixing gear. This allows the sliding sleeve to slide only in one direction, downward, relative to the main rod; the other direction is locked in place by the eccentric gravity lock and the one-way serrations.

[0008] Furthermore, the supporting member is a sealed cloth capable of preventing concrete from leaking.

[0009] A mechanical support method for an adaptive closed cavity comprises the following steps: S. Place the mechanical anchoring structure of the mechanical support device in a folded state into the circular cavity. Under the action of its own weight, the mechanical anchoring structure opens to achieve preliminary mechanical fixation; S. Carry out the first concrete pouring with a pouring height of mm. Use the gravity of the concrete to press the support member downward, thereby driving the mechanical anchoring structure to expand radially, so that the tip is embedded in the peripheral wall of the circular cavity to form a mechanical interlocking; After h, the remaining concrete can be poured, and the anchor body is formed after the concrete solidifies. At this time, the device and the solidified concrete core are integrated with the circular cavity, which not only seals the circular cavity but also ensures waterproof performance.

[0010] Furthermore, an expansion agent is added to the concrete poured for the first time in step S.

[0011] The beneficial effects of the present invention include: designing a mechanical anchoring structure that can be quickly installed and fixed inside a circular cavity, and the mechanical structure can be adaptively fixed according to the different diameters of the circular cavity. Designing a gravity-type lock buckle, the lock can always be fixed in place with the rod through the action of gravity, ensuring the posture of the expansion machine. Specific advantages are as follows: 1. Gravity-driven mechanism: This cleverly utilizes the concrete's own weight as the driving force, resulting in a high degree of automation and eliminating the need for complex external tensioning or jacking equipment. The weight of the freshly poured concrete is used as the sole or primary driving force to achieve radial mechanical expansion of the mechanically anchored structure.

[0012] 2. Increased expansion force: The mechanical anchoring structure efficiently converts vertical downward pressure into horizontal radial expansion force through an articulated connecting rod. This is an ingenious mechanical design. The expansion rod provides a huge radial expansion force, a large mechanical engagement depth, and a pullout resistance significantly higher than traditional methods.

[0013] 3. Construction process of placing first and then expanding: the device is placed with the minimum radial size and expanded to the working size in place, achieving the unity of construction convenience and final anchoring reliability.

[0014] 4. Simple and efficient construction: The device is integrated and concrete can be poured into the hole immediately, which greatly shortens the construction period and reduces labor costs.

[0015] 5. Lossless connection: It relies entirely on mechanical engagement, without the need to drill holes on the cavity wall, and without damaging the original structure.

[0016] 6. Wide applicability: It can be applied to circular cavities of various diameters, such as drilled holes, steel pipe piles, and splicing holes of prefabricated pipe corridors. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the present invention.

[0018] Figure 2 Schematic diagram of unlocking the eccentric gravity lock in the present invention.

[0019] Figure 3 This is a locking schematic diagram of the eccentric gravity lock in the present invention.

[0020] Figure 4 Schematic diagram of the end portion of the expansion rod in the present invention.

[0021] Figure 5 This is a state diagram of the present invention after pouring concrete. The left picture is a schematic diagram of the interior of the circular cavity, and the right picture is a schematic diagram of the removed positioning rod.

[0022] List of reference numerals: 1-Expansion rod, 2-Supporting part, 3-Sliding sleeve, 4-Eccentric gravity lock, 5-Threaded sleeve, 6-Rotary connection component, 7-Lower support rod, 8-Fixed head, 9-Position rod, 10-Support rod, 11-One-way sawtooth, 12-Eccentric mixing gear, 13-Main rod. DETAILED DESCRIPTION

[0023] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be understood that the following specific embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention.

[0024] As shown in the figure, the present invention provides a mechanical support device for an adaptive closed cavity, including a support structure and a mechanical anchoring structure that are detachably connected in an upper and lower manner. The support structure is T-shaped and includes a horizontally arranged support rod 10 and a vertically arranged positioning rod 9. The mechanical anchoring structure includes a vertically arranged main rod 13. The upper end of the main rod 13 is threadedly connected to the lower end of the positioning rod 9 through a threaded sleeve 5, and a fixed head 8 is fixedly sleeved at the lower end. A sliding sleeve 3 that can slide up and down is sleeved on the main rod 13. The outer sides of the sliding sleeve 3 and the fixed head 8 are respectively distributed with the same number of expansion rods 1 and lower support rods 7 in corresponding positions in the circumferential direction. The upper end of the expansion rod 1 is rotatably connected to the sliding sleeve 3, and the lower end is a pointed structure for inserting into the side wall of the circular cavity. The lower end of the lower support rod 7 is rotatably connected to the fixed head 8, and the upper end is rotatably connected to the lower section of the expansion rod 1 through a rotating connection component 6. An eccentric gravity lock 4 is provided on the sliding sleeve 3 to limit the sliding sleeve 3 to move downward only relative to the main rod 13. A supporting member 2 for supporting concrete is arranged on the expansion rod 1.

[0025] In this embodiment, the upper end of the positioning rod 9 is fixed to the middle of the support rod 10, and the support rod 10 is used to support the circular cavity mouth. The positioning rod 9 is used to fix the lower mechanical anchoring structure to the desired position. After fixation, the support rod 10 is rotated to disengage the positioning rod 9 from the threaded sleeve 5.

[0026] In this embodiment, the eccentric gravity lock 4 is rotatably mounted inwardly within the upper end of the sliding sleeve 3, which is provided with an eccentric mixing gear 12. The upper section of the main rod 13 is provided with one-way serrations 11 that mate with the eccentric mixing gear 12. This allows the sliding sleeve 3 to slide only in one direction, downward, relative to the main rod 13; the other direction is locked in place by the eccentric gravity lock 4 and the one-way serrations 11.

[0027] In this embodiment, the supporting member 2 is a sealing cloth capable of preventing concrete from leaking.

[0028] The present invention also provides a mechanical support method for an adaptive closed cavity, comprising the following steps: S1. Place the mechanical anchoring structure of the mechanical support device in a folded state into the circular cavity. Under the action of its own weight, the mechanical anchoring structure opens to achieve preliminary mechanical fixation. S2. Perform the first concrete pouring at a height of 300 mm. Use the gravity of the concrete to press the support member 2 downward, thereby driving the mechanical anchor structure to expand radially, so that the pointed tip is embedded in the peripheral wall of the circular cavity, forming a mechanical interlocking. S3. After 6 hours, the remaining concrete can be poured. After the concrete solidifies, the anchor body is formed. At this time, the device, the solidified concrete core and the circular cavity are integrated, which not only seals the circular cavity but also ensures waterproof performance.

[0029] In this embodiment, an expansion agent is added to the concrete poured for the first time in step S2.

[0030] The technical means disclosed in the solutions of the present invention are not limited to those disclosed in the above-mentioned embodiments, but also include technical solutions composed of any combination of the above-mentioned technical features. It should be noted that those skilled in the art may make various improvements and modifications without departing from the principles of the present invention, and such improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A mechanical support device for an adaptive closed cavity, characterized in that: The invention comprises a support structure and a mechanical anchoring structure which are detachably connected to each other. The support structure is T-shaped and comprises a horizontally arranged support rod (10) and a vertically arranged positioning rod (9). The mechanical anchoring structure comprises a vertically arranged main rod (13). The upper end of the main rod (13) is threadedly connected to the lower end of the positioning rod (9) through a threaded sleeve (5). The lower end is fixedly sleeved with a fixed head (8). The main rod (13) is sleeved with a sliding sleeve (3) which can slide up and down. The outer sides of the sliding sleeve (3) and the fixed head (8) are respectively uniformly distributed with the same number of The expansion rod (1) and the lower support rod (7) are positioned correspondingly, the upper end of the expansion rod (1) is rotatably connected to the sliding sleeve (3), and the lower end is a pointed structure for inserting into the side wall of the circular cavity. The lower end of the lower support rod (7) is rotatably connected to the fixed head (8), and the upper end is rotatably connected to the lower section of the expansion rod (1) through a rotating connection component (6). The sliding sleeve (3) is provided with an eccentric gravity lock (4) for limiting the sliding sleeve (3) to move downward relative to the main rod (13). The expansion rod (1) is provided with a supporting member (2) for supporting concrete.

2. The mechanical support device for an adaptive closed cavity according to claim 1, characterized in that: The upper end of the positioning rod (9) is fixed to the middle of the support rod (10).

3. The mechanical support device for an adaptive closed cavity according to claim 1, characterized in that: The eccentric gravity lock (4) is rotatably arranged inwardly within the upper end of the sliding sleeve (3), and an eccentric mixing gear (12) is provided at the upper end thereof. The upper section of the main rod (13) is provided with a one-way sawtooth (11) adapted to the eccentric mixing gear (12).

4. The mechanical support device for an adaptive closed cavity according to claim 1, characterized in that: The supporting member (2) is a sealed cloth capable of preventing concrete from leaking.

5. A mechanical support method for an adaptive closed cavity, characterized in that: The following steps are involved: S1. Place the mechanical anchoring structure of the mechanical support device in a folded state into the circular cavity. Under the action of its own weight, the mechanical anchoring structure opens to achieve preliminary mechanical fixation. S2, perform the first concrete pouring, with a pouring height of 300mm, and use the gravity of the concrete to press the support member (2) downward, thereby driving the mechanical anchoring structure to expand radially, so that the tip is embedded in the peripheral wall of the circular cavity, forming a mechanical interlocking; S3. After 6 hours, the remaining concrete can be poured, and the anchor body will be formed after the concrete solidifies.

6. The mechanical support method of an adaptive closed cavity according to claim 5, characterized in that: An expansion agent is added to the concrete poured for the first time in step S2.

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