A lifting device for heavy steel pipes

Abstract

This utility model belongs to the technical field of heavy steel pipe processing equipment, and relates to a lifting device for heavy steel pipes. It includes two lifting units arranged opposite each other, each lifting unit comprising a base, guide frames, V-shaped brackets, worm gear jacks, servo motors, and gearboxes. Guide frames are symmetrically installed at both ends of the base along its length, and V-shaped brackets are guided and installed on the guide frames. Worm gear jacks are symmetrically installed on the outer sides of the two guide frames. The two worm gear jacks are driven by a servo motor and gearbox located at the bottom of the V-shaped brackets. The V-shaped brackets are connected to the worm gear jacks via connecting lugs. This utility model has a scientific and reasonable design, and features stable operation, convenient control, reduced maintenance costs, safety and reliability, no impact on steel pipe quality, and ease of implementation. It is a highly innovative lifting device for heavy steel pipes.

Description

Technical Field

[0001] This utility model belongs to the technical field of heavy steel pipe processing equipment, and relates to a lifting device, specifically a lifting device for heavy steel pipes. Background Technology

[0002] Currently, the main lifting equipment for heavy steel pipes is the hydraulic lifting device. The hydraulic lifting device typically consists of a hydraulic pump station and hydraulic cylinders. However, it presents the following problems during use: 1. It is relatively large, requiring ample installation space; 2. Synchronous control of dual-station operation is difficult, the electrical control for synchronization is complex, and maintenance costs are high; 3. The self-locking performance of the hydraulic cylinders is unstable, posing significant safety hazards; 4. Oil leakage may occur during operation, affecting the quality of the finished steel pipe. Summary of the Invention

[0003] The purpose of this utility model is to overcome the shortcomings of the prior art and provide a lifting device for heavy steel pipes that is stable in operation, easy to control, reduces maintenance costs, is safe and reliable, does not affect the quality of steel pipes, and is easy to implement.

[0004] The technical problem solved by this utility model is achieved through the following technical solution: A lifting device for heavy steel pipes is characterized by comprising two lifting units arranged opposite each other on the left and right sides. Each lifting unit includes a base, a guide frame, a V-shaped bracket, a worm gear jack, a servo motor, and a gearbox. Guide frames are symmetrically installed at both ends of the base along its length. V-shaped brackets are guided and installed on the guide frames. Worm gear jacks are symmetrically installed on the outer sides of the two guide frames. The two worm gear jacks are driven by a servo motor and a gearbox located at the bottom of the V-shaped bracket. The V-shaped bracket is connected to the worm gear jack via connecting lugs.

[0005] Furthermore, the guide frame includes a frame body, a drive shaft through hole, and a guide groove. A vertical guide groove is provided at the center of the frame body. The V-shaped bracket slides in the guide groove via a slider provided on its side. A drive shaft through hole is provided on the lower side of the guide groove. A drive shaft is installed through the drive shaft through hole. One end of the drive shaft is connected to the worm gear jack, and the other end of the drive shaft is connected to the gearbox.

[0006] Furthermore, material leakage ports are provided at both ends of the guide groove, and the upper end surfaces of the two vertical groove walls of the guide groove are inclined surfaces that slope inward toward the material leakage ports.

[0007] Furthermore, the V-shaped bracket includes a bracket body and a slider. The bracket body includes a V-shaped top plate, side plates, transverse partition plates, and longitudinal partition plates. Side plates are provided on the left and right sides of the V-shaped top plate. Transverse partition plates are evenly distributed between the side plates. Longitudinal partition plates are provided between each pair of partition plates. A slider is provided on the outer side of the two side plates.

[0008] Furthermore, polymer self-lubricating lining plates are provided on both sides of the slider.

[0009] The advantages and positive effects of this utility model are: 1. This lifting device for heavy steel pipes simplifies the overall structure and reduces manufacturing costs by replacing the traditional hydraulic lifting structure with a worm gear lifting structure. Simultaneously, the worm gear offers excellent self-locking performance, automatically locking upon power failure and unaffected by temperature (the working medium of the hydraulic cylinder, hydraulic oil, is greatly affected by temperature, impacting work efficiency; oil instability affects the stability of the hydraulic lock). Maintenance costs are low: only periodic lubrication of the lead screw is required throughout the process, with no other maintenance items. Synchronization performance is high: without adding an automatic synchronization tracking system, this lifting device achieves high-performance synchronization through a high-precision servo motor. Product quality is improved: it solves the oil contamination problem caused by hydraulic oil leakage.

[0010] 2. This utility model is scientifically and rationally designed, and has the advantages of stable operation, convenient control, reduced maintenance costs, safety and reliability, no impact on the quality of steel pipes, and easy implementation. It is a highly innovative lifting device for heavy steel pipes. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the lifting unit of this utility model; Figure 3 This is a schematic diagram of the structure of the guide frame of this utility model; Figure 4 This is a schematic diagram of the structure of the V-shaped bracket of this utility model.

[0012] Explanation of reference numerals in the attached figures 1-Lifting unit, 2-Heavy steel pipe, 3-V-shaped bracket, 4-Polymer self-lubricating liner, 5-Slider, 6-Connecting ear, 7-Wheeler jack, 8-Base, 9-Servo motor, 10-Guide frame, 11-Discharge port, 12-Inclined structure, 13-Guide groove, 14-Drive shaft through hole, 15-Side plate, 16-V-shaped top plate, 17-Transverse partition plate, 18-Vertical partition plate. Detailed Implementation

[0013] The embodiments of this utility model will be further described in detail below with reference to the accompanying drawings: An innovative feature of a lifting device for heavy steel pipes is that it includes two lifting units 1 arranged opposite each other on the left and right sides. During operation, the two lifting units support both ends of the heavy steel pipe 2. Each lifting unit includes a base 8, a guide frame 10, a V-shaped bracket 3, a worm gear jack 7, a servo motor 9, and a gearbox. The guide frame is symmetrically installed at both ends of the base along its length. The V-shaped bracket is guided and installed on the guide frame. The worm gear jack is symmetrically installed on the outer side of the two guide frames. The two worm gear jacks are driven by the servo motor and gearbox located at the bottom of the V-shaped bracket. The servo motor and gearbox can accurately achieve a constant speed output and determine the number of rotations. The V-shaped bracket is connected to the lifting screw of the worm gear jack through a connecting lug 6.

[0014] Heavy steel pipe jacking involves conditions such as high load, high risk of eccentric loading, and the need for long-term stable operation. The guide frame design can meet three core requirements: rigid support, resistance to eccentric loading, and low wear. The guide frame is made of welded steel structural components and is used to constrain the sway of the V-shaped bracket in the left, right, forward, and backward movements, so that the lifting screw only bears axial force.

[0015] The guide frame includes a frame, a drive shaft through hole 14, and a guide groove 13. A vertical guide groove is provided at the center of the frame. The V-shaped bracket slides in the guide groove via a slider 5 provided on its side. A drive shaft through hole is provided on the lower side of the guide groove. A drive shaft is installed through the drive shaft through hole. One end of the drive shaft is connected to the worm gear jack, and the other end of the drive shaft is connected to the gearbox.

[0016] To prevent foreign objects such as oxide scale on the steel pipe from falling into the guide groove and affecting the sliding of the slider, a discharge port 11 is provided at both ends of the guide groove. The upper end surface of the two vertical groove walls of the guide groove is an inclined surface structure 12 that slopes inward toward the discharge port. This structure design allows foreign objects to be guided into the discharge port along the inclined surface structure, ensuring the smooth lifting and lowering of the slider.

[0017] To improve lifting efficiency and reduce the weight of the V-shaped bracket, the V-shaped bracket is welded from steel plates and includes a bracket body and a slider. The bracket body includes a V-shaped top plate 16, side plates 15, transverse partition plates 17, and longitudinal partition plates 18. Side plates are provided on the left and right sides of the V-shaped top plate, transverse partition plates are evenly distributed between the side plates, and longitudinal partition plates are provided between each pair of partition plates. A slider is provided on the outer side of the two side plates. To increase the wear resistance of the slider, polymer self-lubricating lining plates 4 are provided on both sides of the slider.

[0018] Working principle: The servo motor drives the gearbox to output synchronously from both sides, which in turn drives the worm gear lifters on both sides to rotate via a coupling, thereby pushing the lifting screw to lift and lower, thus fulfilling the lifting function.

[0019] Work process: The electrical control is set to linkage, using a servo motor to achieve lifting and lowering functions in both forward and reverse directions, resulting in synchronized lifting. The motor with its built-in brake reduces motion inertia and ensures synchronized start and stop. By adjusting the spacing between the two lifting units, the system can accommodate the operation of heavy steel pipes of varying lengths.

[0020] Although embodiments and drawings of the present invention have been disclosed for illustrative purposes, those skilled in the art will understand that various substitutions, variations and modifications are possible without departing from the spirit and scope of the present invention and the appended claims. Therefore, the scope of the present invention is not limited to the contents disclosed in the embodiments and drawings.

Claims

1. A lifting device for heavy steel pipes, characterized in that: The device includes two lifting units arranged opposite each other on the left and right. Each lifting unit includes a base, a guide frame, a V-shaped bracket, a worm gear jack, a servo motor, and a gearbox. Guide frames are symmetrically installed at both ends of the base along its length. V-shaped brackets are guided and installed on the guide frames. Worm gear jacks are symmetrically installed on the outer sides of the two guide frames. The two worm gear jacks are driven by a servo motor and a gearbox located at the bottom of the V-shaped bracket. The V-shaped bracket is connected to the worm gear jack via connecting lugs.

2. The lifting device for heavy steel pipes according to claim 1, characterized in that: The guide frame includes a frame, a drive shaft through hole, and a guide groove. A vertical guide groove is provided at the center of the frame. The V-shaped bracket slides in the guide groove via a slider provided on its side. A drive shaft through hole is provided on the lower side of the guide groove. A drive shaft is installed through the drive shaft through hole. One end of the drive shaft is connected to a worm gear jack, and the other end of the drive shaft is connected to a gearbox.

3. A lifting device for heavy steel pipes according to claim 2, characterized in that: Material leakage ports are provided at both ends of the guide groove, and the upper end surfaces of the two vertical groove walls of the guide groove are inclined surfaces that slope inward toward the material leakage ports.

4. A lifting device for heavy steel pipes according to claim 1, characterized in that: The V-shaped bracket includes a bracket body and a slider. The bracket body includes a V-shaped top plate, side plates, transverse partition plates and longitudinal partition plates. Side plates are provided on the left and right sides of the V-shaped top plate. Transverse partition plates are evenly distributed between the side plates. Longitudinal partition plates are provided between each pair of partition plates. A slider is provided on the outer side of the two side plates.

5. A lifting device for heavy steel pipes according to any one of claims 2 or 4, characterized in that: Polymer self-lubricating lining plates are provided on both sides of the slider.

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