Mobile portal girder lifting device

Abstract

This utility model relates to the field of gantry crane equipment, specifically to a mobile gantry lifting device, comprising at least two mobile gantry cranes. Each mobile gantry crane includes a gantry body, a crossbeam, an electric hoist, and a lifting assembly. The bottom of the gantry body is equipped with casters. The crossbeam is fixedly connected to the gantry body, and the electric hoist is laterally slidably connected to the crossbeam. A wire rope is connected to the electric hoist and is connected to the lifting assembly. The lifting assembly includes a rope loop and a crossbeam, with both ends of the rope loop connected to the two ends of the crossbeam. This invention solves the problems of cumbersome installation and disassembly processes, poor flexibility, and poor adaptability caused by the fixed structure of current gantry cranes and lifting machines, which cannot be moved.

Description

Technical Field

[0001] This utility model relates to the field of gantry crane equipment, specifically to a mobile gantry lifting device. Background Technology

[0002] Current technology uses fixed gantry cranes or gantry cranes for lifting beams (such as T-beams). This method requires pre-installing fixed support structures on the piers or abutments, and then installing the gantry crane or gantry crane on these structures. This traditional approach has many problems and limitations. First, the fixed gantry crane and gantry crane need to be installed before lifting and dismantled afterward. The installation and dismantling process is cumbersome and consumes a lot of time, manpower, and resources. Furthermore, in complex terrain and confined spaces, the traditional method results in poor flexibility and adaptability of fixed gantry cranes and gantry cranes; they cannot be moved or repositioned, making it difficult to ensure smooth construction. Utility Model Content

[0003] The present invention aims to provide a mobile gantry lifting device to solve the problems of cumbersome installation and disassembly processes, poor flexibility and adaptability caused by the current fixed structure of lifting machines and gantry cranes, which cannot be moved.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a mobile gantry lifting device, comprising at least two mobile gantry frames; each mobile gantry frame includes a gantry body, a crossbeam, an electric hoist, and a lifting assembly; the bottom of the gantry body is equipped with moving wheels; the crossbeam is fixedly connected to the gantry body; the electric hoist is laterally slidably connected to the crossbeam; a steel wire rope is connected to the electric hoist; the steel wire rope is connected to the lifting assembly; the lifting assembly includes a rope loop and a crossbeam; the two ends of the rope loop are respectively connected to the two ends of the crossbeam; the crossbeam is connected to the steel wire rope.

[0005] The principle and advantages of this scheme are as follows: the movable wheels enable the mobile gantry crane to move. At least two mobile gantry cranes are moved to both ends of the beam. Ropes are then looped onto the beam from both ends, with the ends of the ropes connected to the ends of the crossbeam. The electric hoists on the two mobile gantry cranes are activated, winding the wire ropes. The wire ropes pull the lifting assembly, causing the crossbeam to move upwards. The ropes on the two mobile gantry cranes together lift the beam from both ends, thus achieving the lifting of the beam. Before and after lifting, the electric hoists can move on the crossbeam, changing their position and allowing for adjustments to the lifting position.

[0006] In this patent, the mobile gantry crane can move on the ground, and the mobile gantry lifting device has mobility, flexibility, and adaptability, which can greatly improve the efficiency of hoisting operations. Furthermore, because this mobile gantry lifting device is movable, after hoisting is completed, it can be moved to another location for hoisting other beams without requiring installation or disassembly, thus saving significant time, manpower, and resources.

[0007] The reason why this patent includes at least two mobile gantry cranes is that the beam is quite long, and one mobile gantry crane cannot complete the lifting of the beam. Two mobile gantry cranes can lift both ends of the beam together, ensuring the normal lifting operation of the beam.

[0008] In this patent, the lifting assembly includes a rope and a crossbar. By looping the rope onto the beam, the lifting assembly and the beam can be connected, which is simple, convenient, and quick. The crossbar has a certain length, and its two ends connect to the ends of the rope. There is a certain distance between the two ends of the rope, ensuring that the distance is not too small, thus facilitating the looping of the rope onto the beam.

[0009] Preferably, as an improvement, a pulley seat is fixedly connected to the top of each crossbeam, and a pulley is rotatably connected to the sliding seat. Thus, the wire rope passes over the pulley, and the pulley is used to connect with the wire rope.

[0010] Preferably, as an improvement, the two ends of the crossbeam are provided with rope grooves; a horizontal shaft passes through the end of the crossbeam, and the two ends of the loop rope are located in the rope grooves and looped onto the horizontal shaft. Thus, the two ends of the loop rope have fitting holes. By placing the end of the loop rope into the rope groove and passing the horizontal shaft through the rope groove and fitting hole, the connection between the horizontal shaft and the end of the loop rope is achieved, and the loop rope will not separate from the end of the crossbeam. Using this connection method, the connection structure between the end of the loop rope and the end of the crossbeam is simple, and connection and disassembly are convenient.

[0011] Preferably, as an improvement, a limiting block is fixedly connected to one end of the horizontal shaft. Therefore, the limiting block prevents the horizontal shaft from sliding axially on the crossbeam and falling off.

[0012] Preferably, as an improvement, a fixing block is fixedly connected to the side of the crossbar, the fixing block is located above the crossbar, a pin is vertically slidably connected to the fixing block, and a pin hole is provided at the end of the crossbar away from the limiting block, and the pin is vertically inserted into the pin hole.

[0013] Thus, the horizontal shaft is inserted into the horizontal frame, and the pin is lowered. Under the action of gravity, the bottom end of the pin is inserted into the pin hole of the horizontal shaft, thereby fixing the horizontal shaft. The horizontal shaft will not move axially, preventing it from falling off the horizontal frame, ensuring the stability of the connection between the end of the rope and the horizontal shaft, and ensuring the safety of the hoisting operation.

[0014] Preferably, as an improvement, the fixing block is provided with a vertical hole, the pin is vertically slidably connected in the vertical hole, the side of the fixing block is provided with a vertical groove communicating with the vertical hole, and a movable block is fixedly connected to the side wall of the pin, the movable block passes through the vertical groove and extends to the outside of the fixing block.

[0015] Therefore, by pushing the moving block vertically, the moving block causes the pin to slide in the vertical hole, thereby realizing the vertical position adjustment of the pin, which makes it easy to insert the pin into the pin hole or pull it out of the pin hole.

[0016] Preferably, as an improvement, a movable base is fixedly connected to the bottom of the gantry body, and movable wheels are mounted on the movable base. Thus, the movable base serves to support the gantry body and also connects with the movable wheels.

[0017] Preferably, as an improvement, connecting frames are fixedly connected between the two ends of the crossbeam and the movable seat. The connecting frames serve to connect and support the ends of the crossbeam and the movable seat, and have a load-bearing function, thereby improving the structural stability of the mobile gantry and making it less prone to damage during beam hoisting.

[0018] Preferably, as an improvement, the electric hoist is located above the crossbeam, which has vertical rope holes. These rope holes are strip-shaped and extend along the length of the crossbeam, through which the wire rope passes. This design ensures that the crossbeam does not obstruct the wire rope. The electric hoist moves along the crossbeam, and the wire rope moves within the rope holes.

[0019] Preferably, as an improvement, the diameter of the moving wheels is at least 0.5m; the height of the gantry body is at least 5m, and the length of the crossbeam is at least 5m. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the movable gantry in the movable gantry lifting device.

[0021] Figure 2 for Figure 1 Side view of the gantry.

[0022] Figure 3 This is a schematic diagram of two lifting components lifting the beam.

[0023] Figure 4 This is an enlarged view of the end of the crossbar.

[0024] Figure 5 This is a 3D diagram with the horizontal axis as the center. Detailed Implementation

[0025] The following detailed description illustrates the specific implementation method:

[0026] The reference numerals in the accompanying drawings include: crossbeam 1, electric hoist 2, cross frame 3, connecting frame 4, gantry body 5, moving wheel 6, moving seat 7, beam body 8, rope loop 9, horizontal shaft 10, pulley 11, pulley seat 12, rope groove 13, fixing block 14, vertical hole 15, moving block 16, pin 17, vertical groove 18, connecting part 19, and pin hole 20.

[0027] The basic implementation examples are as follows: Figures 1-5 As shown: The movable gantry lifting device includes at least two movable gantry frames; in this embodiment, there are two movable gantry frames. The two movable gantry frames in this embodiment have the same structure. Figure 1 The structure of a mobile gantry is illustrated.

[0028] In this embodiment, the mobile gantry crane includes a gantry body 5, a crossbeam 1, an electric hoist 2, and a lifting assembly. Movable seats 7 are welded to the bottom of both sides of the gantry body 5. Each movable seat 7 is equipped with two movable wheels 6, which are fitted with rubber tires. In some embodiments, the diameter of the movable wheels 6 is not less than 0.5m.

[0029] A crossbeam 1 is welded and fixedly connected to the top of the gantry body 5. The crossbeam 1 is horizontally positioned, and an electric hoist 2 is horizontally slidably connected to it. Specifically, the electric hoist 2 is located above the crossbeam 1 and is equipped with a drive motor and a rolling wheel. The drive motor drives the rolling wheel to rotate. The rolling wheel, located on the crossbeam 1, moves along the crossbeam 1, thus enabling the electric hoist 2 to move along the crossbeam 1. A guide rail can also be installed on the crossbeam 1 to guide the movement of the rolling wheel. The electric hoist 2 is very common in existing cranes. It is connected to a wire rope for lifting objects; by pulling upwards through the wire rope, the object is lifted.

[0030] In this embodiment, the crossbeam 1 is provided with vertical rope holes, which are strip-shaped and arranged along the length of the crossbeam 1. The wire rope passes through the rope holes. In this way, the crossbeam 1 will not affect the wire rope's ability to lift the object. The electric hoist 2 moves on the crossbeam 1, and the wire rope moves in the rope holes.

[0031] Connecting frames 4 are welded and fixedly connected to both ends of the crossbeam 1 and the movable seat 7. Thus, by setting the connecting frames 4, the connecting frames 4 play a connecting role between the crossbeam 1 and the movable seat 7, making the entire gantry body 5 structure more stable and improving its load-bearing capacity.

[0032] In this embodiment, the bottom of the wire rope is connected to the lifting assembly. Figure 1 , Figures 3-5As shown, the lifting assembly includes a rope 9 and a crossbeam 3. The crossbeam 3 is made of iron, and the rope 9 is made of steel wire. The two ends of the rope 9 are respectively connected to the two ends of the crossbeam 3. In this embodiment, the length of the crossbeam 3 is basically the same as the width of the beam 8.

[0033] The specific connection method between the wire rope and the top of the crossbeam 1 is as follows: multiple pulley seats 12 are welded and fixedly connected to the top of the crossbeam 3. Each pulley seat 12 is rotatably connected to a pulley 11 via a rotating shaft. The wire rope passes around the pulley 11 and is connected to the pulley 11.

[0034] The specific connection method between the rope 9 and the end of the crossbar 3 is as follows: both ends of the crossbar 3 are provided with rope grooves 13; the end of the crossbar 3 is provided with a shaft hole, through which a horizontal shaft 10 passes. The horizontal shaft 10 passes through the rope groove 13. Both ends of the rope 9 are connecting parts 19, and the connecting parts 19 are provided with fitting holes. The horizontal shaft 10 is inserted into the fitting holes, thereby realizing the connection between the rope 9 and the horizontal shaft 10, and realizing the connection between the end of the rope 9 and the end of the crossbar 3.

[0035] To prevent the horizontal shaft 10 from detaching from the horizontal frame 3 and to improve the stability of the horizontal shaft 10 on the horizontal frame 3, in this embodiment, a limiting block is integrally fixedly connected to one end of the horizontal shaft 10. The limiting block is located on one side of the horizontal frame 3. In this way, by the limiting block abutting against the side of the horizontal frame 3, the horizontal shaft 10 can be prevented from moving to the other side of the horizontal frame 3. At the same time, combined with Figure 4 As shown, a fixing block 14 is welded and fixedly connected to the side of the cross frame 3 away from the limiting block. The fixing block 14 is located above the horizontal axis 10. A pin 17 is vertically slidably connected to the fixing block 14. The specific sliding method is as follows: the fixing block 14 is provided with a vertical hole 15, and the pin 17 is vertically slidably connected in the vertical hole 15. The side of the fixing block 14 is provided with a vertical groove 18 communicating with the vertical hole 15. A moving block 16 is welded and fixedly connected to the side wall of the pin 17. The moving block 16 passes through the vertical groove 18 and extends to the outside of the fixing block 14. In this way, the pin 17 can be vertically moved by pushing the moving block 16 vertically.

[0036] Combination Figure 5 As shown, the end of the horizontal axis 10 away from the limiting block is provided with a pin hole 20, and the bottom end of the pin 17 can be vertically inserted into the pin hole 20 under its own gravity.

[0037] In this embodiment, the height of the gantry 5 is at least 5m, and the length of the crossbeam 1 is at least 5m. This ensures that there is sufficient space below the gantry 5 to lift the beam 8.

[0038] The specific implementation process is as follows: The mobile gantry in this embodiment can move on the ground. When lifting the beam 8, the two mobile gantry frames are moved to both ends of the beam 8, with the beam 8 located below the gantry frame 5. Then, the rope 9 is passed through the bottom of the beam 8, and the two ends of the rope 9 are connected to the ends of the crossbeam 3 respectively. During connection, the cross shaft 10 is removed from the crossbeam 3, and the top end of the rope 9 is placed into the rope groove 13. Then, the cross shaft 10 is inserted into the crossbeam 3, passing through the rope groove 13 and the sleeve hole of the connecting part 19. The cross shaft 10 passes out from the bottom of the fixing block 14, and then the pin 17 is slid vertically by the moving block 16, inserting the bottom of the pin 17 into the pin hole 20 of the cross shaft 10. At this time, the cross shaft 10 is fixed, and the cross shaft 10 will not slide freely axially on the crossbeam 3, causing the cross shaft 10 to fall off from the sleeve top end. Of course, in other embodiments, the two ends of the rope 9 can be connected to the horizontal shaft 10 to achieve connection to the horizontal frame 3, and then the rope 9 can be looped on the end of the beam 8. Due to the setting of the horizontal frame 3, there is a certain distance between the two ends of the rope, so that the rope 9 will not come together, making it easier for the rope 9 to be looped on the beam.

[0039] Combination Figure 3 As shown, after the lifting ropes 9 on the two mobile gantry frames are respectively looped onto both ends of the beam 8, the electric hoists 2 on the two mobile gantry frames are started. The electric hoists 2 wind the wire ropes, and the wire ropes pull the crossbeam 3. The crossbeam 3 moves upward, and the crossbeam 3 drives the ropes 9 to move upward. The ropes 9 on the two mobile gantry frames lift the beam 8 from both ends of the beam 8, thus realizing the lifting function of the beam 8.

[0040] After hoisting is completed, the moving block 16 is moved upward, and the moving block 16 drives the pin 17 to move upward. The bottom end of the pin 17 slides out of the pin hole 20. Then the horizontal shaft 10 is removed from the horizontal frame 3. The horizontal shaft 10 no longer fixes the rope 9. The rope 9 is separated from the end of the horizontal frame 3, thus realizing the disconnection of the rope 9 and the horizontal frame 3.

[0041] In this embodiment, the horizontal frame 3 is designed so that when the horizontal frame 3 is lifted, both ends of the horizontal frame 3 simultaneously apply force to the rope 9 to pull it upward, thereby making the upward lifting of the beam 8 more stable. The two ends of the rope 9 are respectively connected to the two ends of the horizontal frame 3, and the ends of the horizontal frame 3 and the rope 9 have sufficient installation space and are stably connected.

[0042] In this embodiment, the diameter of the horizontal axis 10 is not less than 5cm and it is a solid structure, thus enabling it to stably withstand force.

[0043] The above descriptions are merely embodiments of this utility model. Commonly known technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solution of this utility model. These modifications and improvements should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A mobile gantry beam-lifting device, characterized by: It includes at least two mobile gantry cranes; each mobile gantry crane includes a gantry body, a crossbeam, an electric hoist, and a lifting assembly. The bottom of the gantry body is equipped with casters, the crossbeam is fixedly connected to the gantry body, and the electric hoist is slidably connected to the crossbeam. A wire rope is connected to the electric hoist, and the wire rope is connected to the lifting assembly. The lifting assembly includes a rope loop and a crossbeam. The two ends of the rope loop are respectively connected to the two ends of the crossbeam, and the crossbeam is connected to the wire rope.

2. The mobile mast and beam assembly of claim 1, wherein: Each of the crossbeams is fixedly connected to a pulley seat at its top, and pulleys are rotatably connected to the pulley seat.

3. The mobile mast and beam assembly of claim 1, wherein: The crossbar has rope grooves at both ends; a horizontal shaft passes through the end of the crossbar and through the rope groove, and the two ends of the rope are located in the rope groove and are looped on the horizontal shaft.

4. The mobile mast and girder lifting apparatus of claim 3, wherein: One end of the horizontal axis is fixedly connected to a limit block.

5. The mobile mast and girder lifting apparatus of claim 4, wherein: A fixing block is fixedly connected to the side of the cross frame. The fixing block is located above the cross axis. A pin is vertically slidably connected to the fixing block. A pin hole is provided at the end of the cross axis away from the limiting block. The pin is vertically inserted into the pin hole.

6. The mobile mast and girder lifting apparatus of claim 5, wherein: The fixing block has a vertical hole, and the pin is vertically slidably connected in the vertical hole. The side of the fixing block has a vertical groove communicating with the vertical hole. A movable block is fixedly connected to the side wall of the pin, and the movable block extends through the vertical groove to the outside of the fixing block.

7. The mobile mast and girder lifting apparatus of claim 1, wherein: A movable base is fixedly connected to the bottom of the gantry body, and the movable wheels are mounted on the movable base.

8. The mobile mast and beam assembly of claim 7, wherein: Connecting frames are fixedly connected between the two ends of the crossbeam and the movable seat.

9. The mobile mast and girder lifting apparatus of claim 1, wherein: The electric hoist is located above the crossbeam, which has vertical rope holes. The rope holes are strip-shaped and are set along the length of the crossbeam, through which the wire rope passes.

10. The mobile mast and girder lifting apparatus of claim 1, wherein: The diameter of the moving wheels is at least 0.5m; the height of the gantry is at least 5m, and the length of the crossbeam is at least 5m.

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