Auxiliary device for loading and unloading prefabricated concrete floor slab

Abstract

The utility model provides an auxiliary device for loading and unloading a prefabricated concrete floor slab. The auxiliary device comprises a hoisting machine, a traction part and an insertion part, the number of the traction parts is at least two, the top end of each traction part is connected with a lifting hook of a lifting machine, the insertion parts are connected to the bottom ends of the traction parts, and the traction parts are of flexible structures; the insertion part is of a hard columnar structure with the length larger than or equal to 80 cm and used for being inserted into a hole channel of a prefabricated concrete floor. The prefabricated concrete floor loading and unloading auxiliary device has the advantages of being simple in hoisting operation, free of damage to concrete and high in safety.

Description

Technical Field

[0001] The utility model relates to special transfer equipment for building construction, and specifically, to an auxiliary device for loading and unloading precast concrete floor slabs. Background Art

[0002] In building engineering, it is often necessary to prepare precast concrete floor slabs on site. The usage of precast concrete floor slabs is large, and hoisting and unloading are frequent. Currently, wire ropes or rope sleeves are basically used to assist hoisting facilities for hoisting and unloading. The wire ropes or rope sleeves need to be sleeved at the bottom of the precast concrete floor slab. Therefore, a crowbar is required to manually pry out a space at the bottom of the precast concrete floor slab or a spacer block is used to raise a certain space so that the wire ropes or rope sleeves can be sleeved at the bottom of the precast concrete floor slab. On the one hand, hoisting and unloading are inconvenient, and on the other hand, it is easy to damage the precast concrete floor slab.

[0003] As Figure 3 and Figure 4 shown, for the basic principle of existing hoisting, a hoisting machine 1 is used to lift from the bottom of a precast concrete floor slab 3 with the aid of a rope sleeve or a wire rope 2.

[0004] Due to the insufficient friction of the rope sleeve or the wire rope itself, there will also be a problem of slippage, and the safety risk is relatively high.

[0005] To solve the problems of safety, convenience and protection of the precast concrete floor slab, it is urgent to improve this hoisting structure. Content of the Utility Model

[0006] The purpose of the utility model is to overcome the deficiencies of the prior art, and thus provide an auxiliary device for loading and unloading precast concrete floor slabs with simple hoisting operation, no damage to concrete and high safety.

[0007] To achieve the above purpose, the technical solution adopted by the utility model is: an auxiliary device for loading and unloading precast concrete floor slabs, including a hoisting machine, a traction part and an insertion part;

[0008] At least two traction parts are provided, the top ends of each traction part are connected to the hook of the hoisting machine, the insertion part is connected to the bottom end of the traction part, and the traction part is a flexible structure;

[0009] The insertion part is a rigid columnar structure with a length ≥ 80 cm and is used to be inserted into the hole of the precast concrete floor slab.

[0010] Preferably, the traction part is a manganese steel chain.

[0011] Preferably, the grade of the manganese steel chain is G80.

[0012] Preferably, the insertion part is a steel pipe with a diameter ≤ 48 mm and a wall thickness ≥ 3.5 mm.

[0013] Preferably, the traction part is a steel wire rope or a rope sleeve.

[0014] Preferably, the outside of the steel pipe is wrapped with a flexible outer skin.

[0015] Preferably, the flexible outer skin is rubber or a paper sleeve.

[0016] Preferably, the flexible outer skin is detachably installed on the steel pipe.

[0017] Preferably, the traction parts are paired in twos, with 3 - 5 pairs provided in total, and 3 - 5 pairs are correspondingly provided for the insertion parts. The tops of each pair of traction parts are hooked to the hooks of the hoisting machinery.

[0018] Preferably, the cantilever of the hoisting machinery is telescopic.

[0019] The utility model has substantial features and progress compared with the prior art. Specifically, when hoisting a precast concrete floor slab, the insertion part can be inserted into the holes at both ends of the precast concrete floor slab from both ends, and then hoisting is carried out. Due to the pulling force generated during hoisting, the insertion part is lifted up by a certain angle, so that the insertion part is in stable contact with the inner wall of the hole, thereby realizing hoisting and transportation. Since it is not necessary to manually lift the corners of the precast slab and insert a rope sleeve or a steel wire rope, the operation convenience is greatly improved, the damage to the floor slab is reduced, and the safety is also greatly improved.

[0020] Furthermore, a flexible outer skin is wrapped outside the insertion part to enhance the friction force and at the same time reduce the hard contact with the precast concrete floor slab, ensuring that the precast concrete floor slab is not damaged. Description of the Drawings

[0021] Figure 1 is one of the working principle diagrams of an auxiliary device for loading and unloading precast concrete floor slabs in the utility model.

[0022] Figure 2 is the second working principle diagram of an auxiliary device for loading and unloading precast concrete floor slabs in the utility model.

[0023] Figure 3 is one of the structural schematic diagrams of the precast concrete floor slab hoisting equipment in the prior art.

[0024] Figure 4 is the second structural schematic diagram of the precast concrete floor slab hoisting equipment in the prior art.

[0025] In the figures: 1. Hoisting machinery; 2. Steel wire rope; 3. Precast concrete floor slab; 4. Manganese steel chain; 5. Steel pipe. Detailed Embodiments

[0026] The following further describes the technical solutions of the utility model in detail through specific embodiments.

[0027] As Figure 1 and Figure 2 shown, a precast concrete floor loading and unloading auxiliary device includes a hoisting machine 1, a traction part, and an insertion part.

[0028] In this embodiment, the hoisting machine is a general-purpose hoisting machine. The cantilever is telescopic, and the terminal is a hook.

[0029] In this embodiment, the traction part is configured as a manganese steel chain 4 with a manganese steel grade of G80. There are two of them. The top of the chain is connected to the hook of the hoisting machine, and the insertion part is connected to the bottom end of the manganese steel chain 4.

[0030] The insertion part is a rigid columnar structure with a length ≥ 80 cm and is used to insert into the duct of the precast concrete floor.

[0031] In this embodiment, the insertion part selects a steel pipe 5 with a diameter ≤ 48 mm and a wall thickness ≥ 3.5 mm. It is matched with the manganese steel chain 4 to form a lifting chain. Two sets form a pair and work together to lift the precast concrete floor 3.

[0032] In other embodiments, to improve efficiency, multiple pairs of lifting chains can be set, such as setting 3 - 5 pairs. The tops of each pair of lifting chains are hooked to the hook of the hoisting machine, and 3 - 5 precast concrete slabs can be lifted at a time.

[0033] In a preferred embodiment, the outside of the steel pipe is wrapped with a flexible outer skin, and the flexible outer skin is rubber or a paper sleeve. The flexible outer skin is detachably installed on the steel pipe.

[0034] The advantage is that it can protect the concrete from hard contact with the steel pipe 5 and avoid concrete damage. At the same time, it is designed to be detachable and can be replaced regularly.

[0035] In other embodiments, the traction part is a steel wire rope or a rope sleeve, and they can also be used in combination.

[0036] Before lifting, the steel pipe 5 is inserted into the duct of the precast concrete slab 3, and the other end of the manganese steel chain 4 is connected to the hook of the hoisting machine. A group of 2 lifting chains assist in lifting one precast concrete floor slab.

[0037] When lifting, the rubber coating on the steel pipe 5 can increase the contact area between the steel pipe 5 and the duct, ensuring that the local stress of the concrete does not cause damage.

[0038] 6 - 8 lifting chains can be used for each lifting, and 3 - 4 precast slabs can be lifted at a time.

[0039] When unloading, park the precast slab stably and then pull out the steel pipe of the lifting chain from the duct of the precast slab.

[0040] This scheme was experimentally verified at the main construction camp of Jiufengshan Pumped Storage Power Station in Huixian County, Henan Province. The main construction camp of Jiufengshan Pumped Storage Power Station in Huixian County, Henan Province is divided into the upper reservoir camp, the lower reservoir camp, and the underground plant construction camp. The camp adopts a three- to four-story brick-concrete structure. The floor slabs use C30 concrete prefabricated floor slabs, about 3,400 pieces, which are hoisted and transported from the prefabrication plant to the construction site using a truck crane.

[0041] The three camps of Jiufengshan Pumped Storage Power Station in Huixian County, Henan Province use a total of about 3,400 C30 precast concrete floor slabs. The original plan was to use traditional lifting and unloading methods, using one 16t truck crane and 20 man-hours per day to complete the lifting, transportation and unloading of 50 precast concrete floor slabs.

[0042] With this solution, one 16t truck crane is used every day, which consumes 10 man-hours of labor every day, and an average of 82 precast concrete slabs are hoisted, transported, and unloaded, which greatly reduces the number of workers used and improves construction efficiency.

[0043] Finally, it should be noted that: The above describes in detail the preferred implementation of this patent, but this patent is not limited to the above implementation. Various changes can be made within the knowledge scope of ordinary technicians in this field without departing from the purpose of this patent.

Claims

1. A precast concrete floor loading and unloading auxiliary device, characterized in that: It includes a lifting mechanism, a traction unit and an insertion unit; At least two traction parts are provided, the top end of each traction part is connected to the hook of the lifting machine, the insertion part is connected to the bottom end of the traction part, and the traction part is a flexible structure; The insertion part is a hard columnar structure with a length of ≥80 cm, and is used for being inserted into the channel of the precast concrete floor slab.

2. The precast concrete floor slab loading and unloading auxiliary device according to claim 1 is characterized in that: The traction part is a manganese steel chain.

3. The precast concrete floor slab loading and unloading auxiliary device according to claim 2 is characterized in that: The grade of the manganese steel chain is G80.

4. The precast concrete floor slab loading and unloading auxiliary device according to claim 3 is characterized in that: The inserting part is a steel pipe with a diameter of ≤48 mm and a wall thickness of ≥3.5 mm.

5. The precast concrete floor slab loading and unloading auxiliary device according to claim 1 is characterized in that: The traction part is a steel wire rope or a rope loop.

6. The precast concrete floor slab loading and unloading auxiliary device according to claim 4 is characterized in that: The steel pipe is wrapped with a flexible outer skin.

7. The precast concrete floor slab loading and unloading auxiliary device according to claim 6 is characterized in that: The flexible outer skin is a rubber or paper cover.

8. The precast concrete floor slab loading and unloading auxiliary device according to claim 6 or 7, characterized in that: The flexible outer skin and the steel pipe can be detachably installed.

9. The precast concrete floor slab loading and unloading auxiliary device according to claim 8, characterized in that: The traction parts are arranged in pairs, with 3-5 pairs in total, and the insertion parts are arranged in pairs in a matching manner, with the top end of each pair of traction parts being hooked to the hook of the lifting machinery.

10. The precast concrete floor slab loading and unloading auxiliary device according to claim 9, characterized in that: The cantilever of the lifting machinery is retractable.

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