A large center pin installation tool for torpedo ladle

Abstract

The utility model provides a big center pin installation tool of torpedo ladle truck of transporting hot metal belongs to torpedo ladle truck maintenance equipment technical field, is used to conveniently install torpedo ladle truck big center pin. Its technical scheme is: the support base is the flat plate, the lower end of sleeve is perpendicularly welded on the plane of support base, the lower part side of sleeve installs worm wheel, worm gear is engaged with worm wheel in the inner chamber of sleeve, the lower end of lead screw is fixedly installed in the center of worm gear, the upper part of lead screw is sleeved with two transmission nuts, two transmission nuts are welded and connected with the both ends of the inner wall of lifting cylinder, the outer wall of lifting cylinder and the inner wall of sleeve are sliding fit, the opposite sides of sleeve have the sliding groove along the length direction of sleeve respectively, the outer wall opposite sides of lifting cylinder are fixed with sliding block respectively and are embedded in the sliding groove of sleeve two sides, the top plate is welded and connected in the top surface of lifting cylinder. The utility model discloses simple structure, convenient to use, and the installation process is quick and laborsaving, and the labor intensity of personnel is reduced, and the maintenance work efficiency is improved.

Description

Technical Field

[0001] This utility model relates to a tool for installing the large center pin of a torpedo car for transporting molten iron, belonging to the technical field of torpedo car maintenance equipment. Background Technology

[0002] The 320-ton torpedo ladle car used for transporting molten iron in metallurgical enterprises is a large-scale transport equipment. Its large capacity and stable operation make it a highly efficient molten iron transport tool. During the maintenance of the torpedo ladle car, the installation of the large center pin requires one worker to stand below the maintenance trench. Due to the trench's height limitation, only one person can lift the large center pin in a semi-squatting position, raising it to the required height so that the head of the large center pin is higher than the center boss of the upper center plate. Then, a certain angle is turned so that the upper boss of the large center pin aligns with the slot on the upper center plate. Force is then applied to lower the large center pin, thus completing the locking and installation with the upper center plate. The large center pin is 1151 mm long and weighs 41 kg. The suction of the grease significantly increases the thrust required for installation, making the process time-consuming and labor-intensive. The confined space further complicates the process, affecting the efficiency of torpedo ladle car maintenance. Therefore, it is essential to design a user-friendly installation tool to improve the existing installation process. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a tool for installing the large center pin of a torpedo car for transporting molten iron. This tool can easily install the large center pin of the torpedo car, and the installation process is quick and labor-saving, saving maintenance time, reducing the labor intensity of operators, and improving maintenance efficiency.

[0004] The technical solution to the above technical problem is: A tool for installing a large center pin on a torpedo ladle car for transporting molten iron includes a support base, a housing, a worm gear, a worm shaft gear, a lead screw, transmission nuts, a lifting cylinder, and a top plate. The support base is a flat plate. The lower end of the housing is vertically welded to the plane of the support base. The lower side of the housing has an opening, at which the worm gear is installed. The worm shaft gear meshes with the worm gear in the lower part of the housing's inner cavity. The lower end of the lead screw is fixedly installed at the center of the worm shaft gear. Two transmission nuts are fitted onto the upper part of the lead screw, meshing with the lead screw. The lifting cylinder is cylindrical. The circumferences of the two transmission nuts are interference-fitted with the two ends of the inner wall of the lifting cylinder. The outer wall of the lifting cylinder is clearance-fitted with the inner wall of the housing. The top plate is integrally connected to the lifting cylinder.

[0005] The aforementioned torpedo ladle car center pin installation tool for transporting molten iron includes a square box welded to the side opening at the lower part of the sleeve. The square box has shaft holes on both sides. A worm gear shaft is fixed to the center of the worm gear, and both ends of the worm gear shaft are respectively embedded in the shaft holes on both sides of the square box. The worm gear shaft and the shaft holes are connected by bearings. One end of the worm gear shaft extends out of the square box and is welded to a hexagonal head. The aforementioned torpedo car center pin installation tool for transporting molten iron has a lead screw support plate at the lower part of the sleeve, a rotating shaft hole on the upper surface of the lead screw support plate, and the lower end of the lead screw is embedded in the rotating shaft hole. The lower end of the lead screw is connected to the rotating shaft hole through a bearing.

[0006] The aforementioned torpedo car center pin installation tool for transporting molten iron has a U-shaped top plate with a screw connection hole at its center. The upper end of the screw is embedded in the screw connection hole, and the upper end of the screw is connected to the screw connection hole via a bearing.

[0007] The beneficial effects of this utility model are: The lower part of the sleeve of this utility model is equipped with a worm gear structure. The worm gear shaft end is connected to a hexagonal shaft, and the worm gear can be rotated using an electric wrench or a manual crank. The worm is connected to a lead screw, and the worm gear can drive the worm to rotate in the vertical direction, which in turn drives the lead screw to rotate. The inner wall of the lifting cylinder is welded to the transmission nut, and the transmission nut meshes with the lead screw. Since the lifting cylinder cannot rotate, the lead screw can drive the transmission nut and the lifting cylinder to move up and down. The sliding groove is along the length of the sleeve, and the sliders on both sides of the lifting cylinder can slide in the sliding groove. The sliders and the sliding groove have the effect of restraining the lifting cylinder and the transmission nut from rotating with the lead screw. The top plate is fixed to the upper end of the lifting cylinder, and the large center pin of the torpedo tank car is placed on the top plate. The lifting cylinder pushes the top plate to lift the large center pin of the torpedo tank car upward, completing the installation operation.

[0008] This utility model has a simple structure and is easy to use. It can easily install the large center pin of the torpedo tank car. The installation process is quick and labor-saving, saving maintenance time, reducing the labor intensity of operators, and improving maintenance efficiency. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the structure of this utility model.

[0010] The following are the markings in the diagram: 1. Support base; 2. Housing; 3. Square box; 4. Worm gear; 5. Lead screw; 6. Transmission nut; 7. Lifting cylinder; 8. Top plate; 9. Hexagonal head; 12. Hinge shaft; 13. Lead screw support plate; 14. Rotating shaft hole; 15. Lead screw connection hole; 16. Detailed Implementation

[0011] This utility model consists of a support base 1, a shell 2, a square box 3, a worm gear 4, a worm gear 5, a lead screw 6, a transmission nut 7, a lifting cylinder 8, and a top plate 9.

[0012] As shown in the figure, the support base 1 is a flat plate, which can be made of round or square steel plate.

[0013] As shown in the figure, the shell 2 is a cylindrical body, which can be made of steel pipe. The lower end of the shell 2 is vertically welded to the plane of the supporting base 1. The lower side of the shell 2 is open, and a square box 3 is welded to the opening. The top surface of the square box 3 is connected to the box body via a hinge, which facilitates the installation of the worm gear 4. There are shaft holes on both sides of the square box 3. The center of the worm gear 4 is fixed with a worm gear shaft, and the two ends of the worm gear shaft are respectively embedded in the shaft holes on both sides of the square box 3. The worm gear shaft and the shaft holes are connected by bearings. One end of the worm gear shaft extends out of the square box 3 and is welded to the hexagonal head 12.

[0014] As shown in the figure, the worm gear 5 is located in the lower part of the inner cavity of the housing 2, and the worm gear 5 meshes with the worm wheel 4. The lower end of the lead screw 6 is fixedly installed in the center of the worm gear 5. The lower part of the housing 2 has a lead screw support plate 14, and the upper surface of the lead screw support plate 14 has a rotating shaft hole 15. The lower end of the lead screw 6 is embedded in the rotating shaft hole 15, and the lower end of the lead screw 6 is connected to the rotating shaft hole 15 through a bearing.

[0015] As shown in the figure, two transmission nuts 7 are mounted on the upper part of the lead screw 6, and the two transmission nuts 7 mesh with the lead screw 6. The lifting cylinder body 8 is cylindrical, and the circumference of the two transmission nuts 7 is interference-fitted with the two ends of the inner wall of the lifting cylinder body 8, while the outer wall of the lifting cylinder body 8 is clearance-fitted with the inner wall of the housing 2.

[0016] As shown in the figure, the top plate 9 and the lifting cylinder 8 are integrated. The top plate 9 is a U-shaped plate, and there is a lead screw connection hole 16 in the center of the top plate 9. The upper end of the lead screw 6 is embedded in the lead screw connection hole 16, and the upper end of the lead screw 6 is connected to the lead screw connection hole 16 through a bearing.

[0017] The usage process of this utility model is as follows: When installing the large center pin of the torpedo tanker, place the support base 1 in the maintenance pit under the torpedo tanker, so that the top plate 9 is directly below the large center pin. Connect the electric wrench (or hand crank) to the hexagonal head 12 of the worm gear shaft. Start the electric wrench; the electric wrench drives the worm gear 4 to rotate through the hexagonal head 12. The worm gear 4 drives the worm gear 5 to rotate, and the worm gear 5 drives the lead screw 6 to rotate. The transmission nut 7 on the lead screw 6 rises along the lead screw 6, causing the lifting cylinder 8 to rise synchronously. The top plate 9 at the upper end of the lifting cylinder 8 rises. Hold the top plate 9 by hand. After the top plate 9 contacts the large center pin, stop holding the top plate 9, and the top plate 9 continues to rise, lifting the large center pin to the required position. Then, the worker manually rotates the large center pin horizontally to make it enter the slot position, completing the installation. This utility model is reliable, low-cost, and easy to operate, and has great promotional value.

[0018] An embodiment of this utility model is as follows: The diameter of the support base 1 is 100mm and the thickness is 6mm; The outer diameter of shell 2 is 30mm, the inner diameter is 26mm, and the height is 500mm; The square box 3 has a length of 50mm, a width of 50mm, and a height of 50mm; The worm gear 4 has a diameter of 45mm and a thickness of 35mm; The worm gear 5 has a diameter of 25mm and a height of 50mm; The diameter of lead screw 6 is 8mm and its length is 450mm; The diameter of the transmission nut 7 is 16mm and the thickness is 15mm; The lifting cylinder 8 has a diameter of 25mm and a height of 300mm; The top plate 9 is 500mm long, 60mm wide, and 50mm high.

Claims

1. A tool for installing the large center pin of a torpedo ladle car for transporting molten iron, characterized in that: It includes a support base (1), a housing (2), a worm gear (4), a worm gear (5), a lead screw (6), a transmission nut (7), a lifting cylinder (8), and a top plate (9). The support base (1) is a flat plate. The lower end of the housing (2) is vertically welded to the plane of the support base (1). The lower side of the housing (2) is open, and the worm gear (4) is placed inside. The worm gear (5) meshes with the worm gear (4) in the lower part of the inner cavity of the housing (2). The lower end of the lead screw (6) is fixedly installed in the center of the worm gear (5). Two transmission nuts (7) are fitted on the upper part of the lead screw (6). The two transmission nuts (7) mesh with the lead screw (6). The lifting cylinder (8) is a cylindrical tube. The circumference of the two transmission nuts (7) and the two ends of the inner wall of the lifting cylinder (8) are interference fit. The outer wall of the lifting cylinder (8) and the inner wall of the housing (2) are clearance fit. The top plate (9) is integrally connected to the lifting cylinder (8).

2. The torpedo car center pin installation tool for transporting molten iron according to claim 1, characterized in that: The worm gear (4) is placed inside the side opening at the lower part of the housing (2). The two sides of the square box (3) have shaft holes respectively. The worm gear (4) has a worm shaft fixed in the center. The two ends of the worm shaft are respectively embedded in the shaft holes on both sides of the square box (3). The worm shaft and the shaft hole are connected by bearings. One end of the worm shaft extends out of the square box (3) and is fixedly connected to the hexagonal head (12).

3. The tool for installing the large center pin of a torpedo car for transporting molten iron according to claim 1, characterized in that: The lower part of the housing (2) has a lead screw support plate (14), the upper surface of the lead screw support plate (14) has a rotating shaft hole (15), the lower end of the lead screw (6) is embedded in the rotating shaft hole (15), and the lower end of the lead screw (6) is connected to the rotating shaft hole (15) through a bearing.

4. The tool for installing the large center pin of a torpedo car for transporting molten iron according to claim 1, characterized in that: The top plate (9) is a U-shaped plate with a lead screw connection hole (16) in the center. The upper end of the lead screw (6) is embedded in the lead screw connection hole (16), and the upper end of the lead screw (6) is connected to the lead screw connection hole (16) through a bearing.

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