Stable lifting mechanism of conductive trolley

Abstract

The utility model discloses a stable lifting mechanism of a conductive trolley in the related technical field of electric arc furnaces, and the stable lifting mechanism comprises a power cylinder used for lifting a workbench of the conductive trolley, and further comprises a plurality of chain type lifting assemblies which are evenly distributed on the two sides of the workbench of the conductive trolley. The lifting assembly comprises a chain and a plurality of pulleys, one end of the chain is connected with a frame of the conductive trolley, the other end of the chain is connected with a workbench of the conductive trolley, the pulleys are arranged on the workbench, the frame and the lifting guide column respectively, and the chain is connected to the pulleys in a tensioned and wound mode. According to the scheme, the composition and the structure of the lifting mechanism are improved on the basis of the prior art, one power cylinder drives a plurality of lifting assemblies, a power source is saved, meanwhile, multi-point stress is achieved in the lifting process of the workbench, stress is balanced, the stability and the balance of the workbench in the lifting process are enhanced, the lifting stroke of the workbench can be improved, and the working efficiency is improved. And the requirement of lifting height under more conditions is met.

Description

TECHNICAL FIELD

[0001] The utility model belongs to electric arc furnace related technical field, especially related to a stable lifting mechanism of electric conductive trolley. BACKGROUND

[0002] Electric arc furnace is an electric furnace that uses electrode arc to generate high temperature to smelt ore and metal. When gas discharge forms electric arc, energy is very concentrated, and arc area temperature is above 3000 DEG C. For smelting metal, electric arc furnace has greater process flexibility than other steelmaking furnaces, can effectively remove impurities such as sulfur and phosphorus, furnace temperature is easy to control, equipment occupies small area, and is suitable for smelting high-quality alloy steel. Graphite electrode is mainly made of petroleum coke and needle coke as raw material, coal pitch as binder, and is made by calcination, batching, kneading, pressing, baking, graphitization and machining. It is a conductor that releases electric energy in the form of electric arc in the electric arc furnace to heat and melt the furnace charge.

[0003] The temperature of electric arc furnace reaches above 3000 DEG C, and it takes about 60 hours to complete the heating and melting of furnace charge. When power is on, the furnace end busbar needs to be connected with the rectifier side busbar, and the electric hoist is heated after power is on at both ends. After each use of each electric hoist, the material in the electric arc furnace needs to be cooled before it can be taken out. Because the temperature is high, the cooling time is very long.

[0004] In order to improve production efficiency, multiple electric arc furnaces are often used in rotation to avoid production interruption. In order to facilitate production, multiple electric arc furnaces are arranged in order. Therefore, electrode clamps are used to transfer between multiple electric arc furnaces, and the furnace end busbar and the rectifier side busbar are clamped for conduction.

[0005] The applicant has previously developed an electrically conductive trolley, the structure of which is shown in an electrically conductive trolley disclosed in the patent No. CN220062509U, which comprises a clamping mechanism, an electrically conductive track and a trolley body provided on the electrically conductive track. The trolley body comprises a frame, a roller is rotatably mounted on the electrically conductive track below the frame, and a driving mechanism for driving the roller to rotate is mounted on the frame. The clamping mechanism comprises a workbench and a clamping assembly symmetrically arranged at both ends of the workbench. The workbench and the frame are connected by a lifting mechanism. The lifting mechanism comprises a lifting cylinder. A lifting guide column is slidably connected to the periphery of the workbench and connected to the frame. The lifting cylinder is connected to the workbench. The clamping assembly comprises a telescopic device and an electrically conductive busbar connected to the end of the telescopic device. An electrical cabinet is mounted on the frame to provide power for the telescopic device, the lifting mechanism and the driving mechanism. The electrically conductive trolley can quickly clamp and loosen the electrode during the process of rotating use of multiple electric arc furnaces, which is conducive to efficient production. It is found in the use process that the oil cylinder lifting device is used on the center of the workbench to make the workbench move up and down along the lifting guide column through the extension and contraction of the oil cylinder. The disadvantage is that the workbench is subjected to single-point force, the force point is prone to deformation, and the workbench cannot be balanced when subjected to uneven force, resulting in unstable lifting. The space below the workbench is limited, and a single-stage oil cylinder cannot be used. After using a two-stage oil cylinder, the lifting speed of the oil cylinder is not the same when switching between the two stages, which is not conducive to the control of the lifting speed, so it will affect the smooth lifting of the workbench to some extent, and also accelerate the attenuation of the service life of the workbench and the oil cylinder. Practical new type content

[0006] The utility model intends to provide a kind of stable lifting mechanism of electrically conductive trolley, to solve the problem of poor lifting stability caused by the imbalance of workbench lifting in prior art electrically conductive trolley.

[0007] The stable lifting mechanism of electrically conductive trolley in the present scheme comprises a power cylinder, which is used to lift the workbench of the electrically conductive trolley. It also comprises a chain-type lifting assembly. The lifting assembly has multiple groups, and the multiple groups of lifting assemblies are evenly distributed on both sides of the workbench of the electrically conductive trolley. The lifting assembly comprises a chain and multiple pulleys. One end of the chain is connected to the frame of the electrically conductive trolley, and the other end of the chain is connected to the workbench of the electrically conductive trolley. The workbench, the frame and the lifting guide column are each provided with the pulley. The chain is tightly wound around the pulley.

[0008] The working principle of the present scheme is as follows: the present scheme adopts a lifting mechanism combining a power cylinder and a chain-type lifting assembly. The power cylinder can be a gas cylinder or an oil cylinder. The chain in the multiple groups of lifting assemblies is driven by one power cylinder. The chain and the pulley help to expand the lifting stroke of the power cylinder, meet the lifting height requirement, and evenly distribute the stress points around the workbench, so that the workbench is subjected to multiple-point force and balanced, and the lifting stability of the workbench is improved.

[0009] The beneficial technical effects of the scheme are that the composition and structure of the lifting mechanism are improved on the basis of the prior art, one power cylinder drives multiple lifting assemblies, power source is saved, multiple points are stressed during the lifting of the workbench, stress is balanced, stability and balance during the lifting of the workbench are enhanced, the lifting stroke of the workbench is also helped to improve, and the demand for lifting height in more cases is met.

[0010] Further, the chain is connected with the workbench and the frame through the adjusting screw. Each chain can adjust the tension through the adjusting screw respectively, the convenience of adjustment is improved, and the uniform stress of the workbench and the stable lifting are further ensured.

[0011] Further, the lifting assembly has four groups, and the four groups of lifting assemblies are evenly distributed on both sides of the workbench. In the prior art, the workbench is quadrangular, four groups of lifting assemblies are evenly distributed on both sides of the workbench, the overall structure is compact and orderly under the condition of meeting the uniform stress, and maintenance and management are facilitated.

[0012] Further, the lifting assembly comprises four pulleys, two of which are connected to the frame, and the other two are connected to the middle of the workbench and the top of the lifting guide column respectively.

[0013] Further, the pulley connected with the lifting guide column is located directly above one of the pulleys on the frame. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is a front view of the stable lifting mechanism of the conductive trolley when the workbench is lifted.

[0015] Figure 2 It is a side view of the stable lifting mechanism of the conductive trolley. Figure 1

[0016] Figure 3 It is a front view of the stable lifting mechanism of the conductive trolley when the workbench is lowered.

[0017] Figure 4 It is a front view of the stable lifting mechanism of the conductive trolley in combination with the conductive trolley. DETAILED DESCRIPTION

[0018] The following will be further described in detail through specific embodiments:

[0019] The reference signs in the drawings of the specification comprise: chain 1, pulley 2, first pulley 21, second pulley 22, third pulley 23, fourth pulley 24, oil cylinder 3, adjusting screw 4, workbench 5, guide column 6, frame 7, fixed plate 8.

[0020] ​The smooth lifting mechanism of the scheme is mainly a conductive trolley with a publication number CN220062509U, which is a conductive trolley used by the applicant. In order to facilitate the implementation of the scheme and introduce it more clearly, the position and connection relationship between the workbench 5 and the frame 7 of the conductive trolley are introduced here. As shown in Figure 4 , the workbench 5 is a cuboid structure, two guide columns 6 are slidingly connected to the two short sides of the workbench 5, the bottom of the guide column 6 is fixedly connected to the frame 7 of the conductive trolley, and the top of the two guide columns 6 is connected to a horizontally arranged fixed plate 8.

[0021] The embodiment is basically as shown in the accompanying Figures 1 to 4 : A smooth lifting mechanism of a conductive trolley, including an oil cylinder 3 located below the middle of the workbench 5, the telescopic end of the oil cylinder 3 is connected to the workbench 5, the bottom of the oil cylinder 3 is connected to the frame 7, the lifting mechanism in the scheme further includes a chain lifting assembly, the lifting assembly has four groups and is evenly distributed on both sides of the workbench 5, the lifting assembly includes a chain 1 and four pulleys 2, the four pulleys 2 are located in the same vertical plane, the four pulleys 2 are respectively connected to the fixed plate 8, the frame 7 and the workbench 5, among them, two pulleys 2 are connected to the frame 7, which are respectively a first pulley 21, a second pulley 22, a third pulley 23 and a fourth pulley 24. One end of the chain 1 is connected to the short side of the workbench 5 by an adjusting screw 4, and the other end of the chain 1 is connected to the frame 7 of the conductive trolley by an adjusting screw 4 after being tightly wound around the four pulleys 2.

[0022] The implementation process of the scheme is:

[0023] When the workbench 5 needs to be raised, the telescopic end of the oil cylinder 3 is elongated upwards, as shown in Figure 1 , the distance between the first pulley 21 on the fixed plate 8 and the workbench 5 is shortened, and the chain 1 moves along the order direction of the first pulley 21, the second pulley 22, the third pulley 23 and the fourth pulley 24 in the figure.

[0024] When the workbench 5 needs to be lowered, the telescopic end of the oil cylinder 3 is retracted downwards, as shown in Figure 3 , the distance between the first pulley 21 on the fixed plate 8 and the workbench 5 is increased, and the chain 1 moves along the order direction of the fourth pulley 24, the third pulley 23, the second pulley 22 and the first pulley 21 in the figure.

[0025] The scheme adopts an oil cylinder 3 (which can also be selected as a gas cylinder) combined with a chain lifting assembly lifting mechanism, a power cylinder drives the chain 1 in multiple lifting assemblies, and the chain 1 combines with the pulley 2 to help expand the lifting stroke of the power cylinder, meet the lifting height requirement, and at the same time, multiple chains 1 evenly distribute the stress points around the workbench 5, so that the workbench 5 is balanced at multiple points, and the lifting stability of the workbench 5 is improved.

[0026] Based on the above introduction and working principle, the smooth lifting mechanism of the present scheme can also be used in other auxiliary lifting devices.

Claims

1. A smooth lifting mechanism of a conductive trolley, comprising a power cylinder for lifting a worktable of the conductive trolley, characterized in that: The lifting assembly is also a chain type, and the lifting assembly has multiple groups, which are evenly distributed on both sides of the workbench of the conductive trolley.

2. A smooth lifting mechanism of a conductive trolley according to claim 1, characterized in that: The chain is connected with the workbench and the frame by an adjusting screw.

3. A smooth lifting mechanism for an electrically conductive trolley as claimed in claim 2, characterized in that: The lifting assembly has four groups, which are evenly distributed on both sides of the workbench.

4. The smooth lifting mechanism of the conductive trolley according to claim 3, characterized in that: The lifting assembly includes four pulleys, two of which are connected to the frame, and the other two are connected to the middle of the workbench and the top of the lifting column, respectively.

5. A smooth lifting mechanism for an electrically conductive trolley as claimed in claim 4, wherein: The pulley connected with the lifting column is located directly above one of the pulleys on the frame.

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