Mounting and hoisting device for precast concrete guardrail

Abstract

The utility model discloses a prefabricated concrete guardrail mounting and hoisting device, and relates to the technical field of highway engineering guardrail appliances. Comprising a carrying pole beam device (1), a connecting flange (2), a rotating device (3), a lifting arm (4), an L-shaped clamp (5), a connecting bolt (6) and a lifting hook (7). And the seven components form a scissor-shaped mounting lifting appliance. The technical problems that when a prefabricated guardrail is installed, the installation progress is slow and the line shape is poor due to the fact that no appropriate lifting tool exists are solved. After the lifting appliance is used, only two persons are needed for lifting by utilizing a forklift, the construction efficiency is high, and the mounted guardrail is accurate in positioning, round and straight in appearance line shape, simple and convenient to construct and operate, safe and reliable.

Description

Technical Field

[0001] The utility model relates to the field of highway engineering guardrail equipment, in particular to a prefabricated concrete guardrail installation and hoisting device. Background Art

[0002] Concrete guardrail is one of the important traffic safety facilities in highway engineering. Its construction technology mainly includes cast-in-place concrete and prefabricated installation. Most of the guardrails in the central median of highways are prefabricated in factories and transported to the site for installation. The length of the sections of prefabricated guardrails is generally no more than 4m, and the weight is large, which is not conducive to transportation and even more not conducive to precise positioning and installation. It needs to be lifted by loaders, forklifts and other machinery using wire ropes or special slings to assist manual precise positioning and installation. However, since wire ropes and slings are soft materials, they need to be lifted at both ends of the guardrail to maintain left-right balance and ensure verticality up and down in order to accurately position the guardrail. After the guardrail is positioned and placed, it is not convenient to remove the wire rope or sling. The workers are not only cumbersome to operate and have low safety during installation, but also have slow installation progress, poor installation line shape, and quality cannot be guaranteed. In order to solve the above problems encountered during the installation of guardrails, while improving construction efficiency and reducing costs, it is necessary to design a hoisting device that can be applied to the installation of precast concrete guardrails. Utility Model Content

[0003] In view of this, the purpose of the present invention is to provide a precast concrete guardrail installation and hoisting device, aiming to solve the problems raised in the above-mentioned background technology.

[0004] To achieve the above purpose, a precast concrete guardrail installation and lifting device is provided, characterized in that it includes a shoulder beam device, a connecting flange, a rotating device, a hanging arm, an L-shaped clamp, a connecting bolt, and a hook. The above seven constitute a "scissor-shaped" installation and lifting device, the connecting flange is arranged at the bottom of the shoulder beam device, the rotating device is installed at the bottom of the shoulder beam, two hanging arms are arranged at the bottom of the rotating device, two L-shaped clamps are cross-arranged at the bottom of the hanging arm, the connecting bolt is used to connect the L-shaped clamp, and the hook is used to connect the rotating device and the L-shaped clamp. The shoulder beam device adopts two 1200mm long No. 14 channel steels welded into a square tube, and two 800mm long No. 14 channel steels are vertically welded at both ends of the square tube, with the notch facing downward, as a forklift arm insertion port; three Φ20mm steel bars are respectively welded at the longitudinal left, middle and right notches on the 800mm long channel steel to prevent the forklift arm from tipping over due to uneven force during the lifting process.

[0005] The shoulder beam device is welded into a whole by two channel steels, and two channel steels are vertically welded at both ends, with the notches facing downwards, as the insertion port of the forklift arm; the connecting flange is welded by steel plates and welded to the middle of the shoulder beam, and holes are reserved in the steel plate at the bottom of the flange; high-strength bolts are passed through the holes at the bottom of the flange and welded to the lower steel plate to form a rotating device; the lifting arm is cut into rectangular strips by steel plates, and circular holes are punched at both ends, and connected to the rotating device by bolts; the L-shaped clamp is cut into an "L" shape by steel plates, and circular holes are punched at the upper end and the middle position, forming a scissor shape with bolts, and two small steel plates are welded at the mouth of the scissor-shaped clamp to increase the contact area. The upper end of the hook is hung on the welded short steel bar on the side of the rotating device. When hoisting, the lower end hook is not used and is in a free vertical state. When not hoisting, the lower end hook is hung on the bolt protruding in the middle of the scissor shape, so that the clamp is in an open state.

[0006] Furthermore, the rotating device is cut from a 2 cm thick steel plate, cut into a U shape in the middle, with round holes punched at both ends, and high-strength bolts and screws are inserted through the round holes at the bottom of the flange into the U-shaped opening and welded into one piece.

[0007] Furthermore, the boom is cut from a steel plate into four identical rectangular strips, with circular holes punched at both ends; the L-shaped clamp steel plate is cut into four identical "L" shapes, with circular holes punched at the upper end and the bend of the "L" respectively.

[0008] Furthermore, all the circular holes are connected by bolts and 5 mm steel plate spacers are added.

[0009] It can be seen from the above technical solutions that, compared with the prior art, the utility model provides a prefabricated concrete guardrail installation and hoisting device, which solves the technical problem of slow installation progress and poor linear shape caused by the lack of suitable lifting tools during the installation of prefabricated guardrails. After using the hoist, only two people are needed to complete the lifting with a forklift, with high construction efficiency, and the guardrail is accurately positioned after installation, with a rounded and straight appearance, and the construction operation is simple, safe and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0011] Figure 1 It is a schematic diagram of the three-dimensional structure of an embodiment of the utility model;

[0012] Figure 2 It is a schematic diagram of the structure of an embodiment of the utility model in another viewing angle;

[0013] Figure 3 It is a front view of an embodiment of the utility model;

[0014] Figure 4 It is a left side view of an embodiment of the utility model;

[0015] Figure 5 A large-scale drawing of a connecting flange of an embodiment of the utility model;

[0016] In the figure:

[0017] (1)-Pole beam device;

[0018] (2)-Connecting flange;

[0019] (3) - Rotating device;

[0020] (4)-Boom;

[0021] (5)-L clamp;

[0022] (6)-Connecting bolts;

[0023] (7)-Hook. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] See also Figure 1-5 The utility model discloses a prefabricated concrete guardrail installation and hoisting device, the structure of which includes a shoulder beam device, a connecting flange, a rotating device, a hanging arm, an L-shaped clamp, and a connecting bolt hook.

[0026] In this embodiment, the shoulder beam device is welded by two 1200mm long and two 800mm long No. 14 channel steels. First, the two 1200mm long channel steels are welded together to form a square tube, and then the 800mm long channel steel is vertically welded to both ends of the square tube to form a frame side shape "[", with the notch facing downward as the forklift arm insertion port; finally, three Φ20mm steel bars are welded at the notches at the longitudinal left, middle and right positions of the 800mm long channel steel.

[0027] In this embodiment, the connecting flange is cut and welded from a 20mm thick steel plate, and is respectively composed of a bottom plate of 200mm long and 120mm wide, a back side plate of 160mm long and 50mm wide, two end side plates of 60mm long and 50mm wide, and two triangular end side plates (with right angles of 120mm×60mm), which are welded into a whole to form a flange and welded to the middle of the shoulder beam. A circular hole with a diameter of 32mm is reserved in the middle of the flange bottom plate to connect the rotating device.

[0028] In this embodiment, the rotating device is made of high-strength bolts with a diameter of D30mm and a length of 140mm and a 20mm thick 300mm×150mm rectangular steel plate welded on both sides. First, cut a U-shaped notch with a width of 31mm and a depth of 75mm on the long side of the rectangular steel plate, and then insert the high-strength bolt screw into the U-shaped opening and weld it into one. Before welding, a 5mm thick steel plate pad is required on the high-strength bolt, and then pass it through the reserved hole of the connecting flange bottom plate, and finally insert it into the U-shaped opening and weld it into a whole; two circular holes with a diameter of 32mm are punched at 8cm from the edge at both ends of the rectangular steel plate to connect the boom to form a rotating device. Finally, a short steel bar about 8cm long is vertically welded in the middle and lower position of the steel plate to hang the hook.

[0029] In this embodiment, the boom is cut from a 10 mm thick steel plate, with a length of 500 mm and a width of 100 mm. Two arms form a group, totaling 4 arms. Two circular holes with a diameter of 32 mm are punched at the upper and lower ends of the boom, respectively, and connected with the rotating device at the top and the L-shaped clamp at the bottom by connecting bolts.

[0030] In this embodiment, the L-shaped clamp is made of 10mm thick steel plate cut into an "L" shape. The outer angle of the "L" shape is about 100°, and the inner side is cut into an arc. Four pieces are made, two in a group; a round hole with a diameter of 32mm is punched at the upper end of the "L"-shaped steel plate to connect to the boom; another round hole with a diameter of 32mm is punched about 2 / 3 of the way down, and they are placed crosswise oppositely according to the scissor-shaped principle and connected with bolts to form a scissor-shaped clamp. Finally, two 180mm×250mm rectangular steel plates are welded at the mouth of the scissor-shaped clamp to increase the contact area between the clamp and the clamped object.

[0031] In this embodiment, the connection bolts are 80mm long D30mm high-strength bolts, and a total of 5 groups are required. Two groups are required to connect the upper end of the boom with the rotating device, two groups are required to connect the lower end of the boom with the scissor-shaped clamp, and one group is required for the scissor-shaped clamp. All bolt connections are equipped with gaskets, two inside and outside, and the gaskets are made of 5mm thick steel plates cut into 50mm×50mm rectangular blocks.

[0032] In this embodiment, the hook is made of 20mm diameter threaded steel bar, about 60cm long, with upper and lower ends bent into hooks, the upper end is hung on the short steel bar of the rotating device, and the lower end is hung on the scissor-shaped connecting bolt when in use, and can be removed when not in use. The function of the hook is that when the clamp is not lifting heavy objects, the hook is hung on the scissor-shaped connecting bolt, so that the clamp is always in an open state; when lifting, the hook is removed, and the clamp is naturally closed and tightened under the action of gravity, which is convenient and practical to operate.

[0033] In this specification, each embodiment is described part by part, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referenced to each other.

[0034] The above are only preferred implementation modes of the present invention. Although the embodiments of the present invention have been shown and described, it is understandable to those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and these improvements and substitutions should also be regarded as within the scope of protection of the present invention.

Claims

1. A precast concrete guardrail installation and hoisting device, characterized in that: The invention comprises a shoulder beam device (1), a connecting flange (2), a rotating device (3), a suspension arm (4), an L-shaped clamp (5), a connecting bolt (6), and a hook (7), wherein the above 7 constitute a "scissor-shaped" installation hanger, wherein the connecting flange (2) is arranged at the bottom of the shoulder beam device (1), the rotating device (3) is installed at the bottom of the shoulder beam device (1), the two suspension arms (4) are arranged at the bottom of the rotating device (3), the two L-shaped clamps (5) are cross-arranged at the bottom of the suspension arm (4), and the connecting bolts (6) are arranged at the bottom of the suspension arm (4). The bolt (6) is used to connect the L-shaped clamp (5), and the hook (7) is used to connect the rotating device (3) and the L-shaped clamp (5). The shoulder beam device (1) uses two 1200mm long No. 14 channel steels to be welded into a square tube. Two 800mm long No. 14 channel steels are vertically welded at both ends of the square tube, with the notches facing downwards, serving as forklift arm insertion ports; three Φ20mm steel bars are respectively welded at the notches at the left, middle and right positions along the longitudinal direction of the 800mm long channel steel to prevent the forklift arm from tipping over due to uneven force during the lifting process.

2. A precast concrete guardrail installation and hoisting device according to claim 1, characterized in that: The connecting flange (2) is made of 20 mm thick steel plate and welded, and is respectively composed of a bottom plate of 200 mm long and 120 mm wide, a back side plate of 160 mm long and 50 mm wide, two end side plates of 60 mm long and 50 mm wide, and two triangular end side plates, the right-angled sides of the side plates are 120 mm × 60 mm, which are welded into a whole to form a flange and welded to the middle position of the connecting flange (2). A circular hole with a diameter of 32 mm is reserved in the middle of the bottom plate to facilitate the connection of the rotating device (3).

3. The precast concrete guardrail installation and hoisting device according to claim 1 is characterized in that: The rotating device (3) is formed by double-sided welding of high-strength bolts with a diameter of 30mm and a length of 140mm and a 20mm thick rectangular steel plate of 300mm×150mm. First, a U-shaped groove with a width of 31mm and a depth of 75mm is cut on the long side of the rectangular steel plate, and then the high-strength bolt screw is inserted into the U-shaped groove and welded into a whole. Before welding, a 5mm thick steel plate pad is placed on the high-strength bolt, and then the bolt is passed through the reserved hole of the bottom plate of the connecting flange (2), and finally inserted into the U-shaped groove and welded into a whole. Two circular holes with a diameter of 32mm are punched at the two ends of the rectangular steel plate at a distance of 8cm from the edge to connect the boom (4) to form the rotating device (3). Finally, a short steel bar about 8cm long is vertically welded at the lower middle position of the steel plate for use by the hook (7).

4. The precast concrete guardrail installation and hoisting device according to claim 1 is characterized in that: The boom (4) is cut from a 10 mm thick steel plate, is 500 mm long and 100 mm wide, and is grouped in pairs, totaling four. Two circular holes with a diameter of 32 mm are punched at the upper and lower ends of the boom, respectively, and are connected to the rotating device (3) at the top and to the L-shaped clamp (5) at the bottom using connecting bolts (6).

5. The precast concrete guardrail installation and hoisting device according to claim 4 is characterized in that: The L-shaped clamp (5) is made of a 10 mm thick steel plate cut into an "L" shape, the "L" shape angle is about 100 degrees, and the inner side of the "L" shape is cut into an arc shape. Four pieces are made, two in a group; a circular hole with a diameter of 32 mm is punched at the upper end of the "L"-shaped steel plate, which is connected to the suspension arm (4); another circular hole with a diameter of 32 mm is punched at about 2 / 3 of the lower position, and they are placed oppositely and crosswise according to the scissor-shaped principle and connected with bolts to form a scissor-shaped sling. Finally, two 180 mm×250 mm rectangular steel plates are welded at the mouth of the scissor-shaped clamp to increase the contact area between the clamp and the clamped object.

6. The precast concrete guardrail installation and hoisting device according to claim 1, characterized in that: The connecting bolts (6) are 80mm long D30mm high-strength bolts, and a total of 5 groups are required. 2 groups are required to connect the upper end of the boom with the rotating device (3), 2 groups are required to connect the lower end of the boom with the scissor-shaped clamp, and 1 group is required for the scissor-shaped clamp. All bolt connections are equipped with gaskets, 2 inside and outside, and the gaskets are made of 5mm thick steel plates cut into 50mm×50mm rectangular blocks.

7. The precast concrete guardrail installation and hoisting device according to claim 1, characterized in that: The hook (7) is made of a threaded steel bar with a diameter of 20 mm and a length of about 60 cm. The upper and lower ends are bent into hooks. The upper end is hung on the short steel bar of the rotating device (3), and the lower end is hung on the scissor-shaped connecting bolt (6) when in use and can be removed when not in use.

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