Lifting appliance for lifting steel plate

Abstract

The utility model discloses a lifting appliance for lifting a steel plate, which consists of a lifting appliance main body structure, a hydraulic system and an electric control system, the lifting appliance main body structure consists of a main beam, telescopic beams, telescopic oil cylinders, a lifting hook assembly and lifting hook oil cylinders, the main beam is of a hollow structure, the two ends of the main beam are respectively provided with one telescopic beam, the telescopic beams are positioned in the main beam, and the telescopic oil cylinders are arranged on the telescopic beams. A telescopic oil cylinder is connected between the main beam and the telescopic beam, drives the telescopic beam to do telescopic motion in the main beam and is used for adjusting the total length of the lifting appliance; a pair of lifting hook assemblies is fixed on each of the main beam and the telescopic beam, the middle lower parts of each pair of lifting hook assemblies are connected with each other through a lifting hook oil cylinder, and the telescopic movement of the lifting hook oil cylinders is used for adjusting the opening degree of the lifting hook assemblies; the hydraulic system and the electric control system are fixed to the main beam and jointly control the telescopic motion of the telescopic oil cylinder and the lifting hook oil cylinder. When the lifting appliance is used, the position of the telescopic beam is controlled through the telescopic oil cylinder, so that the total length of the lifting appliance is adjusted to adapt to the length of a steel plate.

Description

Technical Field

[0001] This utility model belongs to the field of lifting tool technology, and in particular relates to a lifting tool for lifting steel plates. Background Technology

[0002] After steel plates are produced from steel mills, they are generally transported in the form of steel coils. At the steel coil distribution center, billing equipment is used to open, flatten, and cut the steel coils to a certain length, and then they are stacked together in a certain quantity, waiting for the end user to pick up the goods.

[0003] After being flattened, it is currently in use. Figure 1 The lifting beam a shown is used to lift steel plate d via wire rope b and hook c. During the lifting process, the lifting beam is first moved above the steel plate, then the hook is manually placed below the steel plate, and finally the steel plate is lifted from the stacking area onto a transfer truck. Several problems exist in this process:

[0004] The length of the lifting beam is fixed, but the length of the steel plate varies from 6 meters to 15 meters. During the lifting process, a single lifting beam cannot adapt to the changes in the length of the steel plate.

[0005] Using manual hooks requires one crane operator on each side of the steel plate for each lifting operation, and the lifting process needs to be completed in three separate trips. Manual unhooking is also necessary during placement. This type of lifting beam results in low overall operational efficiency and high overall costs. Summary of the Invention

[0006] In response to the above situation, this utility model designs a telescopic lifting tool for hoisting steel plates, which can adapt to the hoisting and transportation of steel plates of different lengths, and eliminates the need for manual hooking and unhooking.

[0007] The technical solution adopted by this utility model is as follows: a lifting device for lifting steel plates, comprising a main lifting device structure, a hydraulic system, and an electrical control system. The main lifting device structure consists of a main beam, a telescopic beam, a telescopic cylinder, a hook assembly, and a hook cylinder. The main beam is a hollow structure with a telescopic beam at each end, located within the main beam. A telescopic cylinder connects the main beam and the telescopic beam, driving the telescopic beam to extend and retract within the main beam to adjust the overall length of the lifting device. A pair of hook assemblies are fixed on both the main beam and the telescopic beam. The lower middle parts of each pair of hook assemblies are connected to each other via hook cylinders. The extension and retraction of the hook cylinders adjusts the opening degree of the hook assemblies. The hydraulic system and the electrical control system are fixed on the main beam, and together control the extension and retraction of the telescopic cylinders and the hook cylinders.

[0008] Nylon sliders are arranged on the inner side of the head of the main beam and on the outer side of the tail of the telescopic beam. The nylon sliders of the main beam and the telescopic beam are matched with each other.

[0009] The main beam is provided with two hook mounting plates for mounting the hook assembly; the telescopic beam is provided with two hook mounting plates for mounting the hook assembly.

[0010] The hook assembly has six parts, two of which are connected to the main beam through a pin shaft, and four of which are connected to the two telescopic beams through a pin shaft.

[0011] The hook assembly comprises two connecting rods, a hook frame, a roller and a roller shaft, wherein the connecting rods are connected to the main beam or the telescopic beam through a pin shaft, the hook frame is connected to the two connecting rods through a pin shaft, and the roller is connected to the hook frame through the roller shaft.

[0012] The two hook assemblies on the main beam are connected to the same hook cylinder through a pin shaft.

[0013] The two hook assemblies mounted on the same telescopic beam are connected to the same hook cylinder through a pin shaft.

[0014] The lifting and placing process of the utility model is as follows:

[0015] 1) When hooking, the electric control system sends a command to the hydraulic system, and then controls the hook cylinder to extend and expand to the maximum;

[0016] 2) Then, the lifting device is lowered to the position of the steel plate;

[0017] 3) Then, the electric control system sends a command to the hydraulic system, and controls the hook cylinder to retract until the hook clamps the steel plate.

[0018] 4) The lifting device is lifted, and the steel plate is transported to above the truck for transporting the steel plate;

[0019] 5) The lifting device together with the steel plate is placed on the truck;

[0020] 6) The electric control system sends a command to the hydraulic system, and then controls the hook cylinder to extend and expand to the maximum;

[0021] 7) From now on, the steel plate is successfully placed on the truck;

[0022] 8) Finally, the lifting device is moved above the steel plate that needs to be lifted next time, and the next lifting is started.

[0023] When the utility model is used, the position of the telescopic beam is controlled through the telescopic cylinder, and then the total length of the lifting device is adjusted, so as to adapt to the length of the steel plate. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 is a structural schematic view of an existing lifting device;

[0025] Figure 2 is a structural schematic view of the lifting device of the utility model;

[0026] Figure 3 is the structural schematic diagram of the main beam of the lifting appliance of the utility model;

[0027] Figure 4 is the structural schematic diagram of the telescopic beam of the lifting appliance of the utility model;

[0028] Figure 5 is the structural schematic diagram of the lifting hook assembly of the lifting appliance of the utility model;

[0029] Figure 6 is the action control logic diagram of the hydraulic system of the utility model;

[0030] Figure 7 is the schematic diagram of the lifting process of the utility model, wherein 7-1, 7-2, 7-3 and 7-4 are four states of lifting respectively;

[0031] Figure 8 is the schematic diagram of the placing process of the utility model, wherein 8-1, 8-2, 8-3 and 8-4 are four states of placing respectively;

[0032] In the drawing: 1 is the main beam, 2 is the telescopic beam, 3 is the hydraulic system, 4 is the electric control system, 5 is the telescopic oil cylinder, 6 is the pin shaft, 7 is the lifting hook assembly, 8 is the lifting hook oil cylinder, 9 is the lifting hook mounting plate, 10 is the nylon sliding block, 11 is the connecting rod, 12 is the lifting hook frame, 13 is the roller, 14 is the roller shaft, 15 is the control valve group, 16 is the double-motor pump group, 17 is the oil tank, M1 and M2 are the motors, Y1-Y11 are the electromagnets. DETAILED DESCRIPTION

[0033] In order to facilitate the understanding of the utility model, the utility model will be described more comprehensively below with reference to the relevant drawings.

[0034] The preferred embodiment of the utility model is given in the drawing. However, the utility model can be realized in the form of different lengths, different numbers, different geometric sizes and different angles, and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the utility model more thorough and comprehensive.

[0035] From Figure 2 -4, it can be known that the lifting appliance of the utility model is composed of a lifting appliance main body structure, a hydraulic system 3 and an electric control system 4, the lifting appliance main body structure is composed of 1 main beam 1, 2 telescopic beams 2, 2 telescopic oil cylinders 5, 6 lifting hook assemblies 7 and 3 lifting hook oil cylinders 8, wherein the hydraulic system and the electric control system are fixed on the main beam in the form of bolt connection, and the hydraulic system and the electric control system jointly control the telescopic movement of the telescopic oil cylinder and the lifting hook oil cylinder.

[0036] The main beam is a hollow structure, each end of which is provided with a telescopic beam, the telescopic beam is located in the main beam, and a telescopic oil cylinder is connected between the main beam and the telescopic beam, the telescopic oil cylinder drives the telescopic beam to make telescopic movement in the main beam.

[0037] Nylon sliding blocks 10 are arranged on the inner side of the head of the main beam, and nylon sliding blocks are arranged on the outer side of the tail of the telescopic beam.

[0038] Two hook mounting plates 9 are arranged in the middle of the main beam and are used for mounting hook assemblies; the telescopic beam is provided with two hook mounting plates and is used for mounting hook assemblies.

[0039] Six hook assemblies form three pairs of hook assemblies, the upper ends of one pair of hook assemblies are connected with the main beam through pins, and the upper ends of the other two pairs of hook assemblies are connected with the two telescopic beams through pins.

[0040] From Figure 5 It can be known that the hook assembly comprises two connecting rods 11, a hook frame 12, a roller 13 and a roller shaft 14, wherein the upper ends of the two connecting rods are connected with the main beam or the telescopic beam through pins respectively, the middle part of the lower connecting rod is connected with a hook oil cylinder through a pin, the hook frame is connected with the two connecting rods through pins, and the roller is connected with the hook frame through the roller shaft.

[0041] The two hook assemblies on the main beam are connected with the same hook oil cylinder through pins.

[0042] The two hook assemblies mounted on the same telescopic beam are connected with the same hook oil cylinder through pins.

[0043] The hydraulic system of the utility model comprises a double-motor pump set 16, a control valve set 15 and an oil tank 17, and the specific composition is as follows Figure 6 .

[0044] From Figure 6 It can be known that the action control logic of the hydraulic system of the utility model is as follows: 1, the side beam is stretched

[0045] The motors M1 and M2 are started at the same time.

[0046] The electromagnets Y2 and Y10 are electrified at the same time.

[0047] 2, the side beam is retracted

[0048] The motors M1 and M2 are started at the same time.

[0049] The electromagnets Y3 and Y11 are electrified at the same time.

[0050] 3, the hooks are stretched at the same time (quickly)

[0051] Motor M1, M2 are started simultaneously.

[0052] Electromagnet Y1 is energized.

[0053] Y4, Y6 and Y8 are energized simultaneously

[0054] 4, hooks are extended simultaneously (slow)

[0055] Motor M1 is started;

[0056] Y4, Y6 and Y8 are energized simultaneously.

[0057] 5, hooks are retracted simultaneously (fast)

[0058] Motor M1, M2 are started simultaneously;

[0059] Electromagnet Y1 is energized.

[0060] Y5, Y7 and Y9 are energized simultaneously

[0061] 6, hooks are retracted simultaneously (slow)

[0062] Motor M1 is started;

[0063] Y5, Y7 and Y9 are energized simultaneously.

[0064] 7, single hook is extended (fast)

[0065] Motor M1, M2 are started simultaneously;

[0066] Electromagnet Y1 is energized;

[0067] Which hook to be extended, i.e. the corresponding electromagnet in Y4, Y6 and Y8 is energized.

[0068] 8, single hook is extended (slow)

[0069] Motor M1 is started;

[0070] Which hook to be extended, i.e. the corresponding electromagnet in Y4, Y6 and Y8 is energized.

[0071] 9, single hook is retracted (fast)

[0072] Motor M1, M2 are started simultaneously;

[0073] Electromagnet Y1 is energized;

[0074] Which hook to be retracted, i.e. the corresponding electromagnet in Y5, Y7 and Y9 is energized.

[0075] 10, single hook is retracted (slow)

[0076] Motor M1 is started;

[0077] Which hook to retract, namely Y5, Y7 and Y9 in the corresponding electromagnet power.

[0078] The lifting process of the utility model is as shown in the figure Figure 7 , wherein 7-1, 7-2, 7-3 and 7-4 are four states of lifting; the placing process is as shown in the figure Figure 8 , wherein 8-1, 8-2, 8-3 and 8-4 are four states of lifting; the specific process is as follows:

[0079] 1) When the hook is hung, the electric control system sends a command to the hydraulic system, and then controls the hook cylinder to extend and unfold to the maximum.

[0080] 2) Then the lifting appliance is lowered to the position of the steel plate.

[0081] 3) The electric control system sends a command to the hydraulic system, and controls the hook cylinder to retract until the hook clamps the steel plate.

[0082] 4) The lifting appliance is lifted, and the steel plate is transported to above the truck for transporting the steel plate.

[0083] 5) The lifting appliance is placed on the truck together with the steel plate.

[0084] 6) The electric control system sends a command to the hydraulic system, and then controls the hook cylinder to extend and unfold to the maximum.

[0085] 7) From this point, the steel plate is successfully placed on the truck.

[0086] 8) Finally, the lifting appliance is moved to above the steel plate to be lifted next time, and the next lifting is started.

[0087] The embodiments of the utility model only describe the preferred embodiments of the utility model, and do not limit the design idea and scope of the utility model, and various modifications and improvements of the technical scheme of the utility model made by the engineering technicians in the field without departing from the design idea of the utility model should fall into the protection scope of the utility model, and the technical content of the utility model claimed for protection has been recorded in the claim.

Claims

1. A sling for hoisting steel plates, characterized in that: The lifting appliance is composed of a lifting appliance main structure, a hydraulic system and an electric control system, the lifting appliance main structure is composed of a main beam, telescopic beams, telescopic oil cylinders, hook assemblies and hook oil cylinders, the main beam is a hollow structure, each end of the main beam is provided with a telescopic beam, the telescopic beam is located in the main beam, the telescopic oil cylinders are connected between the main beam and the telescopic beam, the telescopic oil cylinders drive the telescopic beams to make telescopic movement in the main beam, and the total length of the lifting appliance is adjusted; a pair of hook assemblies is fixed on the main beam and the telescopic beam, the middle and lower parts of each pair of hook assemblies are connected with each other through hook oil cylinders, and the telescopic movement of the hook oil cylinders is used to adjust the opening degree of the hook assemblies. The hydraulic system and the electric control system are fixed on the main beam, and the hydraulic system and the electric control system jointly control the telescopic movement of the telescopic oil cylinders and the hook oil cylinders.

2. The sling for hoisting steel plates according to claim 1, characterized in that: Nylon sliding blocks are arranged on the inner side of the head of the main beam, and nylon sliding blocks are arranged on the outer side of the tail of the telescopic beam.

3. The sling for hoisting steel plates according to claim 1, characterized in that: Two hook mounting plates for mounting the hook assemblies are arranged in the middle of the main beam, and two hook mounting plates for mounting the hook assemblies are arranged on the telescopic beam.

4. The lifting device for lifting steel plates according to claim 1, characterized in that: The hook assembly is composed of two connecting rods, a hook frame, a roller and a roller shaft, the connecting rods are connected with the main beam or the telescopic beam through a pin shaft, the hook frame is connected with the two connecting rods through a pin shaft, and the roller is connected with the hook frame through the roller shaft.

5. The lifting device for lifting steel plates according to claim 1, characterized in that: The two hook assemblies on the main beam are connected with the same hook oil cylinder through a pin shaft.

6. The lifting device for lifting steel plates according to claim 1, characterized in that: The two hook assemblies mounted on the same telescopic beam are connected with the same hook oil cylinder through a pin shaft.

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