Method for installing a central collector of a slewing crane

Abstract

The application discloses a full-rotation crane center current collector mounting method, and relates to the technical field of crane center current collector mounting. The mounting method comprises the following steps: installing a platform and a chassis before folding an upper cylinder body and a lower cylinder body; fixing a fixing frame with the upper cylinder body and welding and fixing a connecting pipe above the upper platform before folding a rotary chassis and the cylinder body; placing a grating plate above the connecting pipe; folding the rotary chassis and the upper cylinder body; suspending the upper cylinder body, then suspending the lower cylinder body and folding the upper cylinder body; hoisting the center current collector to the rotary center inside the cylinder body; fixing the center current collector with the grating plate and connecting the grating plate with the connecting pipe; and connecting and fixing the center current collector with the bottom of the fixing frame. The application has the advantages that the upper cylinder body and the fixing frame are installed, the lower cylinder body and the platform are installed, then the upper cylinder body and the lower cylinder body are suspended and folded, finally the center current collector is hoisted to complete the installation and fixing, the center current collector mounting structure is stable, and the use is safer.

Description

Technical Field

[0001] This invention relates to the field of crane center current collector installation technology, and specifically to a method for installing a center current collector on a full-slewing crane. Background Technology

[0002] The power supply for a full-slewing crane typically involves connecting a cable reel to a central collector, which in turn connects to the crane's main power distribution control cabinet, which controls the power supply. Large cranes, such as a 3000T full-slewing crane, require the installation of a central collector. Because the installation location must accommodate the 360-degree rotation of the equipment during operation, the central collector is usually installed within the cylindrical body of the slewing bearing of the crossbeam. This cylindrical body consists of an upper and lower section.

[0003] In existing technologies, the central current collector is usually installed and fixed before the upper and lower cylinders are joined. If the central current collector is installed and fixed to the upper cylinder before the lower cylinder is joined, the outer structure of the central current collector is easily touched during the hoisting and joining of the lower cylinder, causing varying degrees of damage. If the central current collector is pre-installed and fixed to the lower cylinder before the lower cylinder and the central current collector are hoisted together with the upper cylinder, the lower cylinder is heavier and is prone to tilting and shaking during hoisting. This instability during hoisting makes the central current collector susceptible to damage or loosening. After the central current collector is joined, the installation structure is not stable, posing a safety risk during use. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a method for installing the center current collector of a full-slewing crane, which can solve the problems existing in the prior art, such as the center current collector being installed and fixed before the upper and lower cylinders are closed, the center current collector being fixed to the upper or lower cylinders before hoisting the lower cylinder, the center current collector being easily damaged or loosened, the center current collector installation structure being unstable after closure and installation, and the safety risks during use.

[0005] To solve the above-mentioned technical problems, the technical solution of the present invention includes the following steps:

[0006] S1. The cylindrical body for installing the central current collector has an upper cylinder and a lower cylinder. Before the upper cylinder and the lower cylinder are joined together, the platform and the base frame are installed. The platform includes an upper platform and a lower platform. The upper platform and the lower platform are installed to the lower cylinder respectively, and the base frame is installed to the lower platform.

[0007] S2. Before the rotating chassis and the cylinder are joined, the fixing frame is welded and fixed to the upper cylinder. The grating plate and the connecting pipe are placed into the lower cylinder and the connecting pipe is welded and fixed above the upper platform. The grating plate is placed above the connecting pipe.

[0008] S3. Close the rotating chassis with the upper cylinder of the cylindrical body;

[0009] S4. Suspend the upper cylinder, then suspend the lower cylinder, and then join the lower cylinder to the upper cylinder.

[0010] S5. Check that the terminals of the center current collector are installed sequentially from top to bottom. Install a gasket at the bottom of the center current collector and hoist the center current collector to the rotation center inside the cylinder using two slings, ensuring that the top of the center current collector is in contact with the fixed frame.

[0011] S6. Fix the central current collector to the grid plate, and connect the grid plate to the top bracket of the connecting pipe with bolts;

[0012] S7. Connect and fix the top of the central current collector to the bottom of the mounting bracket.

[0013] Furthermore, in step S1, when the upper platform and lower platform are installed with the lower cylinder, the channel steel and angle steel of the upper platform and lower platform are welded to the inner wall of the cylinder in a conformal manner, and continuous fillet welds are applied around the perimeter, with a weld leg size of 10mm; the inner wall of the cylinder is welded to the channel steel to ensure that the upper surface of the overall platform is flush.

[0014] Furthermore, in step S2, the weld is a continuous weld.

[0015] Furthermore, in step S5, after the central current collector is hoisted into place, the bottom of the central current collector is installed to the base frame with fastening bolts, and the top of the central current collector is temporarily fixed with hemp rope before the hoisting tools are removed.

[0016] Furthermore, in step S6, the verticality of the central current collector during installation is 5 / 1000.

[0017] The advantages of this invention are as follows: When installing the central current collector inside the cylindrical body, the upper cylinder body is first installed with the fixing frame and the lower cylinder body is installed with the platform. Then, the upper and lower cylinder bodies are suspended and closed. Finally, the central current collector is hoisted and fixed to the upper and lower cylinder bodies. This avoids damage or loosening to the central current collector when the lower cylinder body is suspended and closed. The installation structure of the central current collector is stable and safer to use.

[0018] During installation, first weld the fixing frame to the upper cylinder body, and then close the rotating base to the upper cylinder body. This ensures that the upper cylinder body structure is stable and will not shake when the fixing frame is installed, making the operation easier and ensuring that the welding position will not deviate, resulting in higher welding quality. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall installation of the central current collector of the present invention;

[0020] Figure 2 for Figure 1 A schematic diagram of the AA-direction structure;

[0021] Figure 3 for Figure 1 Schematic diagram of the BB-oriented structure;

[0022] Figure 4 This is a schematic diagram of the hoisting of the central current collector of the present invention. Implementation

[0023] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. The following embodiments will enable those skilled in the art to more fully understand this invention, but do not limit the invention to the scope of the described embodiments.

[0024] The central collector installed in this specific embodiment is the central collector of a 3000T full-slewing crane. The total weight of the central collector body is 2000KG, and the protection level is IP44.

[0025] like Figures 1-4 As shown, the specific implementation method adopts the following technical solution: The installation method of the center current collector of a full-slewing crane includes the following steps:

[0026] S1. The cylindrical body for installing the central current collector has an upper cylindrical body 1 and a lower cylindrical body 2. Before the upper cylindrical body 1 and the lower cylindrical body 2 are closed, the platform and the base frame 5 are installed. The platform includes an upper platform 3 and a lower platform 4. The upper platform 3 and the lower platform 4 are installed to the lower cylindrical body 2 respectively. The channel steel and angle steel of the upper platform 3 and the lower platform 4 are welded to the inner wall of the cylindrical body in a conformal manner. Continuous fillet welds are applied around the perimeter, and the weld leg size is 10mm. The inner wall of the cylindrical body is welded to the channel steel to ensure that the upper surface of the entire platform is flush. The base frame 5 is installed and fixed to the lower platform 4.

[0027] S2. Before the rotating chassis and the cylindrical body are joined, the fixing frame 6 is welded and fixed to the upper cylinder 1. The grating plate 7 and the connecting pipe 8 are placed in the lower cylinder 2 and the connecting pipe 8 is welded and fixed above the upper platform 3. The grating plate 7 is placed above the connecting pipe 8. The weld is a continuous weld.

[0028] S3. Join the rotating chassis with the upper cylinder 1 of the cylindrical body.

[0029] S4. Suspend the upper cylinder 1, then suspend the lower cylinder 2, and close the lower cylinder 2 with the upper cylinder 1.

[0030] S5. Check that the terminal numbers of the central current collector 9 are installed sequentially from top to bottom. Install a gasket at the bottom of the central current collector 9, and hoist the central current collector 9 to the rotation center inside the cylinder using two slings. The top of the central current collector 9 should be in contact with the fixed frame 6. After hoisting the central current collector 9 into place, install the bottom of the central current collector 9 to the base frame 5 with fastening bolts. After temporarily securing the top of the central current collector 9 with hemp rope, remove the hoisting tools.

[0031] S6. Fix the central current collector 9 to the grille plate 7, and connect the grille plate 7 to the top bracket of the connecting pipe 8 with bolts. When installing the central current collector 9, the verticality of the installation is 5 / 1000.

[0032] S7. Connect and fix the top of the center current collector 9 to the bottom of the fixed frame 6 to complete the installation of the center current collector of the full-slewing crane.

[0033] In this specific embodiment, when installing the central current collector inside the cylindrical body, the upper cylinder and the fixing frame, and the lower cylinder and the platform are installed first. Then, the upper and lower cylinders are suspended and closed. Finally, the central current collector is hoisted and fixed to the upper and lower cylinders. This avoids damage or loosening of the central current collector when the lower cylinder is suspended and closed. The installation structure of the central current collector is stable and safer to use. During installation, the fixing frame is first welded and fixed to the upper cylinder, and then the rotating chassis is closed to the upper cylinder. This ensures that the upper cylinder structure is stable when the fixing frame is installed and will not shake. This makes operation easier, and the welding position will not deviate, resulting in higher welding quality.

[0034] The foregoing has shown and described the basic principles and main features of the present invention, as well as its advantages. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A method for installing a central current collector on a full-slewing crane, characterized in that: Includes the following steps: S1. The cylindrical body for installing the central current collector has an upper cylinder and a lower cylinder. Before the upper cylinder and the lower cylinder are joined together, the platform and the base frame are installed. The platform includes an upper platform and a lower platform. The upper platform and the lower platform are installed to the lower cylinder respectively, and the base frame is installed to the lower platform. S2. Before the rotating chassis and the cylinder are joined, the fixing frame is welded and fixed to the upper cylinder. The grating plate and the connecting pipe are placed into the lower cylinder and the connecting pipe is welded and fixed above the upper platform. The grating plate is placed above the connecting pipe. S3. Close the rotating chassis with the upper cylinder of the cylindrical body; S4. Suspend the upper cylinder, then suspend the lower cylinder, and then join the lower cylinder to the upper cylinder. S5. Check that the terminals of the center current collector are installed sequentially from top to bottom. Install a gasket at the bottom of the center current collector and hoist the center current collector to the rotation center inside the cylinder using two slings, ensuring that the top of the center current collector is in contact with the fixed frame. After the central current collector is hoisted into place, the bottom of the central current collector is installed to the base frame with fastening bolts, and the top of the central current collector is temporarily fixed with hemp rope before the hoisting tools are removed. S6. Fix the central current collector to the grid plate, and connect the grid plate to the top bracket of the connecting pipe with bolts; S7. Connect and fix the top of the central current collector to the bottom of the mounting bracket.

2. The method for installing a central current collector on a full-slewing crane according to claim 1, characterized in that: In step S1, when the upper platform and lower platform are installed with the lower cylinder, the channel steel and angle steel of the upper platform and lower platform are welded to the inner wall of the cylinder in a conformal manner, and continuous fillet welds are applied around them with a weld leg size of 10mm; the inner wall of the cylinder is welded to the channel steel to ensure that the upper surface of the entire platform is flush.

3. The method for installing a central current collector on a full-slewing crane according to claim 1, characterized in that: In step S2, the weld is a continuous weld.

4. The method for installing a central current collector on a full-slewing crane according to claim 1, characterized in that: In step S6, the verticality of the central current collector during installation is 5 / 1000.

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