Trolley tensioning device of steel plate ship unloader

Abstract

The utility model provides a steel plate ship unloader trolley tensioning device which comprises a fixing mechanism, a driving mechanism, a tensioning pulley and a guide assembly, the driving mechanism is distributed on one side of the tensioning pulley, connected with the tensioning pulley in a driving mode and capable of driving the tensioning pulley to move linearly, and the guide assembly is distributed on the other side of the tensioning pulley and comprises two guide pulleys. A lifting steel wire rope enters the tensioning pulley through the first guide pulley and is guided out through the second guide pulley; a contact piece is arranged on the outer side wall of the tensioning pulley yoke, a first limiting switch and a second limiting switch which are vertically distributed are arranged on the inner side wall of the supporting frame, the driving mechanism is provided with a force sensor, and the force sensor can detect the tensioning degree of the lifting steel wire rope. The steel wire rope tensioning device is compact in structure, small in occupied space, simple in structure, easy to operate, capable of adjusting the lifting of the driving rod of the driving mechanism in time when the steel wire rope is loosened, capable of keeping the steel wire rope in a tensioning state, simple in problem finding and repairing, low in maintenance cost and high in safety.

Description

Technical fields:

[0001] This utility model belongs to the technical field of steel plate unloading machine equipment, specifically relating to a tensioning device for a steel plate unloading machine trolley. Background technology:

[0002] Steel plate unloaders are specialized equipment used for loading and unloading steel plates. They are primarily used for the efficient and safe unloading of steel plates from ships, featuring electromagnetic suction and release, lifting, and hoisting functions. They can operate independently or in combination with a loaded trolley, performing lifting and trolley movement, or both. This equipment boasts powerful lifting capacity, stable operating performance, and intelligent operation functions, adapting to the unloading needs of steel plates of different sizes, weights, and types. It is an indispensable key piece of equipment in modern port logistics and the steel industry, its efficiency and safety directly impacting port throughput and enterprise production efficiency. For steel plate unloaders, the trolley tensioning device is a critical component. During operation, the lifting wire rope frequently raises and lowers the steel plates, causing continuous friction between the wire rope and components such as pulleys and drums. Under prolonged load, the wire rope can elongate, making it prone to slipping out of the pulley groove, affecting normal operation and even causing safety accidents. The trolley tensioning device serves two purposes: first, it maintains appropriate tension in the wire rope to prevent it from loosening and jumping out of the groove; second, it reduces wire rope vibration, fatigue wear, and extends the wire rope's lifespan.

[0003] Traditional wire rope tensioning devices are located at the tail of the rear beam structure of the steel plate unloader. They employ a left-right swinging tensioning mechanism. During operation, one end of the hydraulic cylinder is fixed to the structural component via a pin, and the other end is connected to a lever via a pin. The middle part of the lever is fixed to the structural component via a rotating shaft. The wire rope pulley is connected to the lower part of the lever. During operation, if the wire rope becomes loose, the hydraulic cylinder extends, pushing the lever to the right. The lever, through the rotating shaft, drives the wire rope pulley to the left, thus achieving the effect of tensioning the wire rope. Figure 6 As shown. However, the above structure has the following drawbacks: First, the left-right swing tensioning device is relatively complex, containing multiple components and connection points. If the wire rope tensioning fails during operation, troubleshooting and repairing the problem consumes a significant amount of time and manpower, leading to excessively high maintenance costs. Second, installation costs are high; ensuring correct installation of each component requires high-precision operation, resulting in a long installation cycle. Third, maintenance costs are high. Under high load operation, the wire rope pulleys of the steel plate unloader will wear severely. When replacing the wire rope, because the wire rope tensioning pulley is located below the lever, and the lifting wire rope passes through the pulley, the wire rope cannot be secured, making pulley replacement troublesome and maintenance costs high.

[0004] Therefore, this utility model provides a tensioning device for a steel plate unloading machine trolley to solve the above problems. Summary of the Invention:

[0005] The purpose of this invention is to address the shortcomings of existing technologies by providing a tensioning device for a steel plate unloading machine trolley.

[0006] The present invention adopts the following technical solution:

[0007] This utility model provides a tensioning device for a steel plate unloader trolley, including a drive mechanism, a tensioning pulley, and a guide assembly. The drive mechanism is fixedly connected to the steel plate unloader, and is located on one side of the tensioning pulley, driving the tensioning pulley to move linearly. The guide assembly is located on the other side of the tensioning pulley, including a first guide pulley and a second guide pulley that are parallel to each other. The lifting wire rope enters the tensioning pulley through the first guide pulley and exits through the second guide pulley.

[0008] Furthermore, a fixing mechanism is also provided, which is fixedly connected to the steel plate unloader. The drive mechanism is fixed to the steel plate unloader through the fixing mechanism. The fixing mechanism includes two support frames with the same structure and arranged in parallel. The tension pulley is rotatably installed in the tension pulley frame, which is located between the two support frames. The drive mechanism is distributed above the tension pulley frame and connected to the support frame. The drive rod of the drive mechanism is drivenly connected to the tension pulley frame.

[0009] Furthermore, the first guide pulley and the second guide pulley are distributed below the tension pulley and are rotatably installed inside the guide pulley frame, which is fixedly connected to the support frame.

[0010] Furthermore, the outer wall of the tensioning pulley frame is provided with a contact element, and the inner wall of the support frame is provided with a first limit switch and a second limit switch distributed vertically; when the drive rod of the drive mechanism extends to its maximum extent, the contact element contacts the second limit switch, and when the drive rod of the drive mechanism retracts to its maximum extent, the contact element contacts the first limit switch.

[0011] Furthermore, the drive mechanism is fixedly connected to two support frames via a fixed frame; the fixed frame is a rectangular frame structure distributed between the two support frames, and the two outer sides of the fixed frame are fixedly connected to the two support frames respectively; the drive mechanism is fixedly installed inside the fixed frame.

[0012] Furthermore, the tension pulley frame includes two sets of tension pulley mounting plates that are mirror-symmetrical. The tension pulley mounting plates are provided with pin holes, and pins are installed in the pin holes. The tension pulleys are rotatably mounted on the pins.

[0013] Furthermore, the guide pulley frame includes a horizontal plate and two vertical plates; the horizontal plate is fixedly connected to the bottom end of two support frames, and the two vertical plates are vertically fixed below the horizontal plate; a pin hole is provided on the vertical plate, and a pin is installed in the pin hole; the first guide pulley and the second guide pulley are rotatably connected to the pin through bearings.

[0014] Furthermore, the drive mechanism is equipped with a force sensor, which can detect the tension of the lifting wire rope.

[0015] Furthermore, the angle between the planar projection of the tension pulley and the planar projection of the two guide pulleys is 10 to 15°.

[0016] Furthermore, the support frame is a channel steel structure, and the two support frames with channel steel structures are mirror-symmetrical.

[0017] Furthermore, the driving mechanism is a hydraulic cylinder, a pneumatic cylinder, or an electric cylinder.

[0018] Furthermore, the tensioning device of the steel plate unloader trolley is installed on the rear beam of the steel plate unloader.

[0019] The beneficial effects of this invention are:

[0020] (1) The vertical trolley tensioning device of this utility model has a more compact structure in the vertical direction, requires less space for installation, is easier to operate, and improves work efficiency.

[0021] (2) The vertical trolley tensioning device of this utility model has a simpler structure than the swing trolley tensioning device. The structures are connected by pins. If the wire rope tensioning is faulty and the device cannot work, it is easy to find and repair the problem and the maintenance cost is low.

[0022] (3) The vertical trolley tensioning device of this utility model is arranged on the rear beam structure of the steel plate unloader. When the steel plate unloader is under high load and the steel wire rope pulley is severely worn and the steel wire rope needs to be replaced, the steel wire rope passes through the tensioning pulley through the guide pulley. During replacement, the guide pulley can play a fixing role, reducing manpower, reducing maintenance costs, and ensuring strong safety. Attached image description:

[0023] Figure 1 This is an overall structural diagram of the tensioning device of this utility model;

[0024] Figure 2 This is a connection diagram of the drive mechanism and support frame of this utility model;

[0025] Figure 3 This is a structural diagram of the tensioning pulley frame of this utility model;

[0026] Figure 4This is a diagram showing the moving state of the tension pulley of this utility model;

[0027] Figure 5 This is a schematic diagram showing the connection between the tensioning device of this utility model and the steel plate unloader;

[0028] Figure 6 This is a schematic diagram of the structure of an existing wire rope tensioning device;

[0029] The labels in the attached diagram are:

[0030] 1. Drive mechanism; 2. Tensioning pulley; 3. Guide assembly; 4. Support frame; 5. Tensioning pulley frame; 5-1. Tensioning pulley mounting plate; 5-2. Pin hole; 6. Guide pulley frame; 6-1. Horizontal plate; 6-2. Vertical plate; 7. First limit switch; 8. Second limit switch; 9. Fixing frame; 10. Connecting piece; 11. Steel wire rope; 12. Rear beam; A. Installation position of this device; 13. Hydraulic cylinder; 14. Hinge shaft; 15. Lever; 16. Pulley. Detailed implementation method:

[0031] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0032] Example 1

[0033] like Figure 1 As shown, this embodiment provides a tensioning device for a steel plate unloader trolley, which is installed on the rear beam of the steel plate unloader and includes a drive mechanism 1, a tensioning pulley 2, and a guide assembly 3.

[0034] The drive mechanism 1 is a hydraulic cylinder (which can also be replaced by a pneumatic or electric cylinder), fixedly mounted on the rear beam of the steel plate unloader. The drive mechanism 1 is located on one side of the tension pulley 2 and is connected to it, enabling the tension pulley 2 to move linearly. The guide assembly 3 is located on the other side of the tension pulley 2 and includes a first guide pulley and a second guide pulley that are parallel to each other. The lifting wire rope enters the tension pulley 2 through the first guide pulley and exits through the second guide pulley.

[0035] In application, the hoisting wire rope is first wound around the first guide pulley, then around the tension pulley 2 for redirection, and then around the second guide pulley. The first guide pulley, the second guide pulley, and the tension pulley 2 rotate synchronously to transmit the wire rope's tension. When the wire rope is detected to be loose, the drive mechanism 1 is activated. The drive mechanism 1 drives the tension pulley 2 to rise, increasing the tension on the wire rope and restoring it to a taut state, thus preventing safety accidents.

[0036] This device is installed on the rear beam of the steel plate unloader trolley for easy equipment debugging and maintenance. Figure 5 As shown, Figure 1 yes Figure 5 The DD view. In other embodiments of this utility model, the device can also be installed in other locations of the steel plate unloader according to actual needs.

[0037] Example 2

[0038] The main structure of this embodiment is the same as that of embodiment 1. The difference is that the position and installation method of the drive mechanism 1 are further defined in this embodiment.

[0039] Specifically, refer to Figures 1-2 The drive mechanism 1 is fixed to the steel plate unloader via a fixing mechanism. The fixing mechanism includes two parallel support frames 4 with identical structures. The support frames 4 are channel steel structures, and the two channel steel support frames 4 are mirror-symmetrical. The tension pulley 3 is rotatably installed inside the tension pulley frame 5, which is located between the two support frames 4. The drive mechanism 1 is positioned above the tension pulley frame 5 and fixedly connected to the support frames 4. The drive rod of the drive mechanism 1 is driven by the tension pulley frame 5, enabling linear movement of the tension pulley frame 5 and the tension pulley 3.

[0040] like Figure 2 As shown, the drive mechanism 1 is fixedly connected to two support frames 4 via a fixed frame 9. The fixed frame 9 is a rectangular frame structure distributed between the two support frames 4. The two outer sides of the fixed frame 9 are fixedly connected to the two support frames 4 respectively. The drive mechanism 1 is fixedly installed inside the fixed frame 9.

[0041] like Figure 3 As shown, the tension pulley frame 5 includes two sets of tension pulley mounting plates 5-1 that are mirror-symmetrical. The tension pulley mounting plates 5-1 are provided with pin holes 5-2, and pins are installed in the pin holes 5-2. The tension pulley 2 is rotatably mounted on the pins.

[0042] In addition, a slider is provided on the outer surface of the tension pulley frame 5, and correspondingly, a vertical slide rail adapted to the slider is provided on the inner surface of the support frame 4. When the tension pulley frame 5 moves up and down, the slider slides in the vertical slide rail, which can improve the movement stability of the tension pulley frame 5 and the tension pulley 3.

[0043] Example 3

[0044] The main structure of this embodiment is the same as that of embodiment 2. The difference is that the installation method of the first guide pulley and the second guide pulley is further specified in this embodiment.

[0045] Reference Figure 4 The first guide pulley and the second guide pulley are distributed below the tension pulley 3 and are rotatably installed in the guide pulley frame 6. The guide pulley frame 6 is fixedly connected to the support frame 4.

[0046] Specifically, the guide pulley frame 6 includes a horizontal plate 6-1 and two vertical plates 6-2. The horizontal plate 6-1 is fixedly connected to the bottom of the two support frames 4, and the two vertical plates 6-2 are vertically fixed below the horizontal plate 6-1. The vertical plate 6-2 has a pin hole, and a pin is installed in the pin hole. The first guide pulley and the second guide pulley are rotatably connected to the pin through bearings.

[0047] In addition, the tensioning pulley 2 has a certain angle with the first guide pulley and the second guide pulley. More specifically, the angle between the plane projection of the tensioning pulley 2 and the plane projection of the two guide pulleys is 10 to 15°, which can prevent the wire rope from getting tangled on the input side and the output side and causing failure.

[0048] Example 4

[0049] The main structure of this embodiment is the same as that of embodiment 3, except that:

[0050] In this embodiment, the outer wall of the tensioning pulley frame 5 is provided with a contact element, and the inner wall of the support frame 4 is provided with a first limit switch 7 and a second limit switch 8 distributed vertically. Figure 1 and Figure 4 As shown.

[0051] When the drive rod of drive mechanism 1 extends to its set maximum limit, the contact element contacts the second limit switch 8. When the drive rod of drive mechanism 1 retracts to its set maximum limit, the contact element contacts the first limit switch 7. The first limit switch 7 and the second limit switch 8 are connected to the main control system of the external device. When the distance the drive rod of drive mechanism 1 rises or falls beyond the design range, a potential equipment malfunction is detected, requiring personnel to conduct a safety inspection of the equipment. The purpose of this design is to further provide safety assurance and minimize the occurrence of accidents.

[0052] Example 5

[0053] The main structure of this embodiment is the same as that of embodiment 4, except that:

[0054] In this embodiment, the drive mechanism 1 is equipped with a force sensor, which is connected to the main control system of the peripheral device. The force sensor can detect the tension of the lifting wire rope.

[0055] Specifically, such as Figure 1 and Figure 4 As shown, a connector 10 is fixedly installed below the drive rod of the drive mechanism 1. The connector 10 has a horizontal through hole, and a mounting groove is provided below the horizontal through hole of the connector 10. The mounting groove communicates with the horizontal through hole, and a pressure sensor is fixedly installed in the mounting groove. The upper ends of the two sets of tension pulley mounting plates 5-1 of the tension pulley frame 5 have mounting holes. The two sets of tension pulley mounting plates 5-1 are sleeved on the connector 10, so that the horizontal through hole and the mounting hole are aligned. The pin is inserted and installed in the horizontal through hole and the mounting hole, realizing the connection between the tension pulley frame 5 and the connector 10, and the lower end of the pin can contact the pressure sensor.

[0056] When the equipment is in operation, the wire rope is under tension, and the wire rope exerts a pulling force on the tensioning pulley. Consequently, the tensioning pulley frame 5 exerts a certain pulling force on the connecting piece 10, causing the pin shaft to exert pressure on the pressure sensor below it. The pressure sensor can display the corresponding reading.

[0057] When the pressure sensor reading is less than the specified range, it indicates that the tension of the wire rope on the tensioning pulley has decreased, meaning that the wire rope has become loose. The operator can control the drive rod of the drive mechanism 1 to rise to increase the tension, or the main control system can control the drive rod of the drive mechanism 1 to rise to increase the tension, so that the wire rope returns to a taut state.

[0058] In other embodiments of this invention, a tension sensor can be provided, with both ends connected to the drive mechanism 1 and the tension pulley frame 5. When the reading of the tension sensor is less than a specified range, the drive rod of the drive mechanism 1 is lifted using the aforementioned control method, causing the wire rope to return to a tensioned state. In other embodiments of this invention, an electric cylinder with a built-in force sensor can also be directly used, achieving the same technical effect.

[0059] The above are merely preferred embodiments of this utility model. The scope of protection of this utility model is not limited to the above embodiments. All technical solutions within the scope of this utility model are within the scope of protection of this utility model. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should be considered within the scope of protection of this utility model.

Claims

1. A tensioning device for a steel plate unloading machine trolley, characterized in that, It includes a drive mechanism (1), a tension pulley (2), and a guide assembly (3); The drive mechanism (1) is fixedly connected to the steel plate unloader. The drive mechanism (1) is distributed on one side of the tension pulley (2) and is driven by the tension pulley (2), which can drive the tension pulley (2) to move linearly. The guide assembly (3) is located on the other side of the tension pulley (2) and includes a first guide pulley and a second guide pulley that are parallel to each other. The lifting wire rope enters the tension pulley (2) through the first guide pulley and is discharged through the second guide pulley.

2. The tensioning device for the steel plate unloading machine trolley according to claim 1, characterized in that, A fixing mechanism is also provided, which is fixedly connected to the steel plate unloader. The drive mechanism (1) is fixed to the steel plate unloader through the fixing mechanism. The fixing mechanism includes two support frames (4) with the same structure and arranged in parallel. The tension pulley (2) is rotatably installed in the tension pulley frame (5), and the tension pulley frame (5) is arranged between the two support frames (4). The drive mechanism (1) is located above the tension pulley frame (5) and connected to the support frame (4). The drive rod of the drive mechanism (1) is driven by the tension pulley frame (5).

3. The tensioning device for the steel plate unloading machine trolley according to claim 2, characterized in that, The first guide pulley and the second guide pulley are distributed below the tension pulley (2) and are rotatably installed in the guide pulley frame (6). The guide pulley frame (6) is fixedly connected to the support frame (4).

4. The tensioning device for the steel plate unloading machine trolley according to claim 2, characterized in that, The outer wall of the tensioning pulley frame (5) is provided with a contact element, and the inner wall of the support frame (4) is provided with a first limit switch (7) and a second limit switch (8) distributed vertically. When the drive rod of the drive mechanism (1) extends to its maximum extent, the contact element contacts the second limit switch (8), and when the drive rod of the drive mechanism (1) retracts to its maximum extent, the contact element contacts the first limit switch (7).

5. The tensioning device for the steel plate unloading machine trolley according to claim 2, characterized in that, The drive mechanism (1) is fixedly connected to two support frames (4) via a fixed frame (9); The fixed frame (9) is a rectangular frame structure distributed between two support frames (4). The two outer sides of the fixed frame (9) are fixedly connected to the two support frames (4) respectively. The driving mechanism (1) is fixedly installed inside the fixed frame (9).

6. The tensioning device for the steel plate unloading machine trolley according to claim 2, characterized in that, The tension pulley frame (5) includes two sets of tension pulley mounting plates (5-1) that are mirror-symmetrical. The tension pulley mounting plate (5-1) has a pin hole (5-2) and a pin is installed in the pin hole (5-2). The tension pulley (2) is rotatably mounted on the pin.

7. The tensioning device for the steel plate unloading machine trolley according to claim 3, characterized in that, The guide pulley frame (6) includes a horizontal plate (6-1) and two vertical plates (6-2); The horizontal plate (6-1) is fixedly connected to the bottom of the two support frames (4), and the two vertical plates (6-2) are vertically fixed below the horizontal plate (6-1); the vertical plate (6-2) is provided with a pin hole, and a pin is installed in the pin hole; the first guide pulley and the second guide pulley are rotatably connected to the pin through bearings.

8. The tensioning device for the steel plate unloading machine trolley according to claim 1, characterized in that, The drive mechanism (1) is equipped with a force sensor, which can detect the tension of the lifting wire rope.

9. The tensioning device for the steel plate unloading machine trolley according to claim 1, characterized in that, The angle between the plane projection of the tension pulley (2) and the plane projection of the two guide pulleys is 10-15°.

10. The tensioning device for the steel plate unloading machine trolley according to claim 2, characterized in that, The support frame (4) is a channel steel structure, and the two support frames (4) with channel steel structures are mirror symmetrical.

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