Telescopic cantilever double-beam portal crane

Abstract

The utility model discloses a telescopic cantilever double-beam portal crane, and relates to the technical field of cranes, in particular to the telescopic cantilever double-beam portal crane, which comprises a main beam, the main beam consists of an upper-layer beam and a lower-layer beam, the bottom of the upper-layer beam is respectively provided with an upper beam stopper and a driving wheel, and the top of the lower-layer beam is provided with a lower beam stopper. According to the telescopic cantilever double-beam portal crane, through the arrangement of the upper-layer beam, the lower-layer beam, the electric hoist, the matching plate and the reinforcing plate, the telescopic cantilever double-beam portal crane has the functions that the cantilever can stretch out and draw back at will, the cantilever retracts when not used, and the cantilever extends out when used; compared with the prior art, the lifting device has the advantages of being convenient to use, simple in structure, low in failure rate, high in efficiency and multipurpose, the effective lifting hook length of the cantilever and the effective lifting height of lifting force are increased, the site utilization rate is increased, the effect of avoiding obstacles in the cantilever is achieved, and the purpose of improving practicability is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of cranes, in particular to a telescopic cantilever double-beam gantry crane. Background Art

[0002] Gantry crane is a kind of deformation of bridge crane, also called gantry crane. It is mainly used for loading and unloading of outdoor cargo yard, material yard cargo and bulk cargo. Gantry crane has the characteristics of high site utilization, large operating range, wide adaptability and strong versatility. It is widely used in port cargo yards. Its metal structure is like a door-shaped frame. Two legs are installed under the load-bearing main beam. It can walk directly on the track on the ground. Both ends of the main beam can have an outward cantilever beam. It is widely used in high-speed rail, water conservancy and hydropower, ordinary railways, tunnels and other working conditions where enterprises have obstacles and cannot use gantry crane cantilever, but some places must use tunnels (for example: cantilever is needed on the bridge under construction, but cantilever cannot be used in the tunnel). It can save customers procurement costs, convenient use, one machine for multiple uses and other advantages. In the past, the designs of other manufacturers were far from meeting the use requirements of this product.

[0003] 1. The original product has a single main beam structure, and its stability is not as stable as this product. 2. Because the electric hoist needs to descend to a certain depth to lift objects in the pit, but the single-winding electric hoist is too long when the descent depth is relatively deep, resulting in a large cantilever that affects safety. 3. The effective height of the previous single-beam double-layer telescopic crane will be greatly reduced, and it cannot be used in tunnels or other effective spaces. Now a telescopic cantilever double-beam gantry crane is invented to solve the above problems. Utility Model Content

[0004] 1. Technical issues to be resolved

[0005] In view of the deficiencies in the prior art, the utility model provides a telescopic cantilever double-beam gantry crane, which solves the problems raised in the above-mentioned background technology.

[0006] (II) Technical solution

[0007] To achieve the above purpose, the utility model is implemented through the following technical scheme: a retractable cantilever double-beam gantry crane, including a main beam, the main beam is composed of an upper beam and a lower beam, the bottom of the upper beam is respectively installed with an upper beam stopper and a driving wheel, the top of the lower beam is installed with a lower beam stopper, a mobile electric hoist is arranged on the top of the upper beam, a matching plate is installed on the front of the upper beam by bolts, the rear of the matching plate is rotatably connected with a rolling wheel by an axle rod, and reinforcement plates are installed on the front and rear of the lower beam.

[0008] Optionally, the position of the upper beam stopper corresponds to the position of the lower beam stopper, and the outer surface of the driving wheel abuts against the top of the lower beam.

[0009] Optionally, the outer surface of the rolling wheel abuts against the bottom of the lower beam, and the lowest position of the upper beam stopper is lower than the highest position of the lower beam stopper.

[0010] Optionally, the cross-section of the reinforcement plate is U-shaped, the highest position of the reinforcement plate is higher than the highest position of the upper beam, and the reinforcement plate is sleeved outside the upper beam.

[0011] Optionally, the number of the upper beam stoppers, the driving wheels and the lower beam stoppers is several, and several upper beam stoppers and driving wheels are both located between two lower beam stoppers.

[0012] Optionally, the position of the upper beam is higher than that of the lower beam, and the position of the electric hoist corresponds to that of the lower beam.

[0013] Optionally, the length of the lower beam is 10700 mm, the effective height of the upper beam is 4500 mm, and the highest position of the reinforcement plate is 5700 mm.

[0014] The utility model provides a telescopic cantilever double-girder gantry crane, which has the following beneficial effects:

[0015] 1. The telescopic cantilever double-girder gantry crane, through the settings of the upper beam, the lower beam, the electric hoist, the matching plate and the reinforcement plate, enables the telescopic cantilever double-girder gantry crane to have the function of arbitrarily telescoping the cantilever, retracting when not using the cantilever, and extending when using it, and has the functions of convenient use, simple structure, low failure rate, high efficiency and multi-purpose of one machine, achieving the purpose of improving the practicability.

[0016] 2. The telescopic cantilever double-girder gantry crane, through the settings of the upper beam, the lower beam, the electric hoist, the matching plate and the reinforcement plate, enables the telescopic cantilever double-girder gantry crane to have the effects of increasing the effective hook length of the cantilever, the effective lifting height of the lifting force, increasing the site utilization rate and avoiding the obstacles inside the cantilever, achieving the purpose of improving the practicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a front view structural schematic diagram of the utility model;

[0018] Figure 2 is a side view structural schematic diagram of the utility model;

[0019] Figure 3 is a structural schematic diagram of the electrical control schematic diagram of the utility model;

[0020] Figure 4 is a structural schematic diagram of the electrical control schematic diagram of the utility model;

[0021] Figure 5 is a structural schematic diagram of the electrical control schematic diagram of the utility model.

[0022] In the figure: 1. upper beam; 2. lower beam; 3. mobile electric hoist; 4. mating plate; 5. reinforcement plate. Specific implementation manner

[0023] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0024] Embodiment 1

[0025] Please refer to Figures 1 to 5 , the present invention provides a technical solution: a telescopic cantilever double-beam gantry crane, including a main beam, the main beam is composed of an upper beam 1 and a lower beam 2, the position of the upper beam 1 is higher than the position of the lower beam 2, the position of the electric hoist 3 corresponds to the position of the lower beam 2, the length of the lower beam 2 is 10700 mm, the effective height of the upper beam 1 is 4500 mm, the highest position of the reinforcement plate 5 is 5700 mm, upper beam stops and drive wheels are respectively installed at the bottom of the upper beam 1, the positions of the upper beam stops correspond to the positions of the lower beam stops, the outer surface of the drive wheels abuts against the top of the lower beam 2, the number of the upper beam stops, drive wheels and lower beam stops are all several, several upper beam stops and drive wheels are all located between two lower beam stops, a lower beam stop is installed at the top of the lower beam 2, a mobile electric hoist 3 is arranged at the top of the upper beam 1, a mating plate 4 is installed in front of the upper beam 1 through bolts, a rolling wheel is rotatably connected to the back of the mating plate 4 through a shaft rod, the outer surface of the rolling wheel abuts against the bottom of the lower beam 2, the lowest position of the upper beam stop is lower than the highest position of the lower beam stop, reinforcement plates 5 are installed on the front and back of the lower beam 2, the cross-section of the reinforcement plate 5 is U-shaped, the highest position of the reinforcement plate 5 is higher than the highest position of the upper beam 1, and the reinforcement plate 5 is sleeved outside the upper beam 1.

[0026] During use, when adjusting the position of the electric hoist for lifting heavy objects, the position of the upper beam is moved by driving the pulley. The driving pulley abuts against the top of the lower beam, facilitating the movement of the upper beam and the adjustment of the position of the electric hoist. The outer surface of the rolling wheel abuts against the bottom of the upper beam, and through the cooperation of the matching plate, it assists in the movement of the position of the upper beam. It has the function of arbitrarily telescoping the cantilever, retracting when not in use and extending when in use. It has the functions of being easy to use, simple in structure, low in failure rate, high in efficiency, and multi-functional. It increases the effective hook length of the cantilever, the effective lifting height of the lifting force, increases the site utilization rate, avoids obstacles inside the cantilever, and facilitates the lifting of heavy objects through the electric hoist. The telescopic structure we designed can be used on tire cranes, rail-mounted cranes, suspended cranes, etc. The patent applied for this time adopts the mode of a double-layer box-shaped square beam. The lower layer adopts a structure with square steel welded on the box-shaped beam, and the upper layer adopts a structure with square steel welded on the box-shaped beam. By operating the trolley to run left and right, the cantilever can be extended and retracted, avoiding obstacles affecting the cantilever arbitrarily, and can be used conveniently by extending and retracting the cantilever when there are no obstacles. In order to ensure that there is no tipping phenomenon under the condition of lifting weight when the upper beam is in the extended state, we have two solutions to ensure safety: 1. Pour cement on the rear wheels of the upper layer to increase the counterweight; 2. Two anti-rollers can effectively prevent the occurrence of tipping accidents in the overweight state. Since the two sides of the main beam of the lower layer cannot be connected by end beams, we use the form of adding saddles on the top to ensure the control range of the deformation amount of the lower main beam under the strong contraction force and the swinging force during operation. In order to prevent the upper main beam from rushing out of the lower beam due to strong impact during operation, we use an electrical limiter and a stop to hard prevent the occurrence of accidents. The above-mentioned hoist and trolley also use an electrical limiter and a stop to hard prevent the occurrence of accidents.

[0027] The above is only the preferred specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A telescopic cantilever double-beam gantry crane, comprising a main beam, characterized in that: The main beam is composed of an upper beam and a lower beam. The upper beam stopper and driving wheels are respectively installed at the bottom of the upper beam, and the lower beam stopper is installed at the top of the lower beam. A mobile electric hoist is arranged on the top of the upper beam. A matching plate is installed on the front of the upper beam by bolts, and a rolling wheel is connected to the back of the matching plate by an axle rod. Reinforcement plates are installed in front and back of the lower beam.

2. A telescopic cantilever double-beam gantry crane according to claim 1, characterized in that: The position of the upper beam stopper corresponds to the position of the lower beam stopper, and the outer surface of the driving wheel abuts against the top of the lower beam.

3. The telescopic cantilever double-beam gantry crane according to claim 1, characterized in that: The outer surface of the rolling wheel abuts against the bottom of the lower beam, and the lowest position of the upper beam stopper is lower than the highest position of the lower beam stopper.

4. The telescopic cantilever double-beam gantry crane according to claim 1, characterized in that: The cross section of the reinforcement plate is U-shaped, the highest position of the reinforcement plate is higher than the highest position of the upper beam, and the reinforcement plate is sleeved on the outside of the upper beam.

5. The telescopic cantilever double-beam gantry crane according to claim 1, characterized in that: There are several upper beam stops, driving wheels and lower beam stops, and the several upper beam stops and driving wheels are located between the two lower beam stops.

6. The telescopic cantilever double-beam gantry crane according to claim 1, characterized in that: The position of the upper beam is higher than that of the lower beam, and the position of the electric hoist corresponds to the position of the lower beam.

7. The telescopic cantilever double-beam gantry crane according to claim 1, characterized in that: The length of the lower beam is 10700mm, the effective height of the upper beam is 4500mm, and the highest position of the reinforcement plate is 5700mm.

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