A shore power system load simulation measuring device

Abstract

The utility model relates to a kind of quay crane power system load simulation measuring device, it is related to quay crane load measurement technical field;The utility model is to solve in the work condition simulation and performance verification link of quay crane reconstruction, if using traditional real load test method, not only need to erect and the container or counterweight of actual load etc. Heavy, there are also inherent limitations such as high test cost, operation safety hazard, work condition switching is not flexible, etc. The utility model includes mounting plate, first support, pivot, cable roll, cable, adjustable brake mechanism and clutchable driving device;A group of first supports are arranged on mounting plate, pivot is rotatably connected on first support, cable roll is fixedly sleeved on pivot, and cable is wound on cable roll;Clutchable driving device is arranged on mounting plate, and the output end of clutchable driving device is drivingly connected with pivot;The utility model is used for quay crane load measurement.

Description

Technical Field

[0001] This utility model relates to the field of quay crane load measurement technology, and in particular to a quay crane power system load simulation measurement device. Background Technology

[0002] A quay crane, also known as a shore-based container crane, is a core large-scale piece of equipment used for ship loading and unloading operations at the forefront of modern container terminals. Its main structure consists of a gantry, front extension beam, rear extension beam, lifting mechanism, trolley traction mechanism, and electrical control system. During operation, the quay crane extends its tilting front extension beam outwards from the quay edge, using a mobile trolley that travels at high speed along the front extension beam's track and specialized lifting and lowering spreaders to precisely grab containers from the ship and transfer them to terminal transport vehicles, and vice versa. Key performance parameters of quay cranes include lifting capacity, lifting height, outward reach, rear extension, and operational efficiency, which directly determine the size of ships it can serve. As the "throat" of port logistics, the single-machine operational efficiency of quay cranes is a core benchmark for measuring the overall throughput capacity and operational level of the terminal.

[0003] With the continuous development of global trade and the in-depth promotion of the smart port concept, the number of port loading and unloading equipment in my country has shown a rapid growth trend. Existing port self-generated container terminals adopt an independent power station power supply mode to meet the power demand of continuous terminal operations. Under this special power supply architecture, conventional diesel generator sets cannot continuously absorb high-power reverse current power due to technical limitations, so it is necessary to modify the existing quay cranes.

[0004] In the research and testing of hybrid power energy-saving retrofit technology for port quay cranes, the operating power characteristics of the hoisting motor and the trolley motor are key indicators for evaluating the capacity configuration, energy management strategy, and collaborative control effect of the energy storage system. However, in the laboratory or R&D phase, if traditional load testing methods are used for operational simulation and performance verification, it is not only necessary to set up containers or counterweights of equal weight to the actual load, but also suffers from inherent limitations such as high testing costs, significant operational safety hazards, and inflexible switching of operating conditions, making it difficult to meet the requirements for multi-condition and repeatable testing. Utility Model Content

[0005] In order to address the inherent limitations of traditional load testing methods in the simulation and performance verification of quay crane retrofitting, which require the installation of containers or counterweights of equal weight to the actual load, and also suffer from high testing costs, significant operational safety hazards, and inflexible switching of operating conditions, this invention provides a quay crane power system load simulation and measurement device to solve the problems mentioned in the background art.

[0006] The technical solution of this utility model is: A load simulation and measurement device for a quay crane power system includes a mounting plate, a first bracket, a rotating shaft, a cable roller, a cable, an adjustable braking mechanism, and a clutchable drive device. A set of first brackets is provided on the mounting plate. The rotating shaft is rotatably connected to the first brackets. The cable roller is fixedly sleeved on the rotating shaft, and the cable is wound on the cable roller. The mounting plate is equipped with a clutchable drive device, the output end of which is connected to the rotating shaft for driving the cable roller to rotate and retract the cable; an adjustable braking mechanism is mounted on the mounting plate and acts on the rotating shaft to apply an adjustable braking force to the cable roller.

[0007] Furthermore, the adjustable braking mechanism includes a second bracket, a brake arm, brake pads, a brake disc, a brake lever, a leveling block, an elastic mechanism, and a handwheel; The second bracket is fixed to the mounting plate. The lower ends of the two brake arms are respectively hinged to the front and rear sides of the second bracket. A brake disc is fixedly sleeved on the rotating shaft. Brake pads are installed on both brake arms. The two brake pads are symmetrically arranged on both sides of the brake disc. The upper end of one brake arm is hinged to one end of the brake lever. The upper end of the other brake arm is hinged to a leveling block. The other end of the brake lever slides through the leveling block. The handwheel is installed on the end of the brake lever through a threaded engagement. The elastic mechanism is sleeved on the brake lever and located between the handwheel and the leveling block.

[0008] Furthermore, the elastic mechanism is a spring, with its two ends abutting against the handwheel and the leveling block, respectively.

[0009] Furthermore, the brake pads are detachably fixed to the brake arm by bolts.

[0010] Furthermore, the clutchable drive device includes a controllable clutch coupling, a third bracket, and a drive mechanism; The third bracket is fixed to the mounting plate, and the drive mechanism is fixed to the third bracket. The output shaft of the drive mechanism is coaxially connected to the rotating shaft through a controllable clutch coupling. The controllable clutch coupling is used to realize the controllable transmission and separation of power between the drive mechanism and the rotating shaft.

[0011] Furthermore, the controllable clutch coupling includes a transmission sleeve, a transmission rod, and a first pin; The transmission sleeve is coaxially and fixedly connected to the rotating shaft, the transmission rod is rotatably connected inside the transmission sleeve, and the end of the transmission rod is fixedly connected to the output shaft of the drive mechanism. The first pin is radially and detachably inserted through the transmission sleeve and the transmission rod.

[0012] Furthermore, a limit pin is provided on the first pin to limit the axial movement of the first pin.

[0013] Furthermore, the drive mechanism uses a DC motor.

[0014] Furthermore, a handle is rotatably connected to the handwheel.

[0015] Furthermore, a scale is installed on the brake lever.

[0016] Compared with the prior art, the present invention has the following advantages: 1. This utility model is equipped with a cable roller wound with a cable, an adjustable braking mechanism, and a clutchable drive device. The output end of the clutchable drive device is connected to the cable roller for transmission, thereby driving the cable roller to perform a winding operation. The adjustable braking mechanism applies an adjustable braking force to the cable roller. During operation, the cable is connected to a hoisting motor or trolley with the power to be tested, the connection between the cable roller and the clutchable drive device is disconnected, and the hoisting motor or trolley with the power to be tested is started, causing it to drive the cable to perform a unidirectional unwinding operation from the cable roller. The braking force of the braking mechanism is adjusted to simulate the load resistance under different working conditions, thereby enabling the testing of the power output of the hoisting motor or trolley under different load conditions. After the test, the cable roller is connected to the clutchable drive device, and the clutchable drive device is started to cause the cable roller to wind in the reverse direction, completely retrieving the cable onto the cable roller.

[0017] 2. This utility model is equipped with an adjustable braking mechanism for continuously and adjustably applying braking force to the cable roller. The adjustable braking mechanism includes two adjustable brake arms. The brake disc is fixedly connected to the cable roller via a rotating shaft. By adjusting the pressure applied to the brake disc by the two brake arms, resistance changes under different load conditions can be simulated. The upper end of one brake arm is hinged to one end of the brake lever, and the upper end of the other brake arm is hinged to a leveling block. The other end of the brake lever slides through the leveling block. A handwheel is threadedly installed at the end of the brake lever. An elastic mechanism is sleeved on the brake lever and located between the handwheel and the leveling block. During operation, rotating the handwheel compresses the elastic mechanism via the thread. The compression of the elastic mechanism changes linearly with the depth of handwheel rotation, thereby pushing the two brake arms to synchronously apply pressure to the brake disc, achieving continuous linear adjustment of the braking force and accurately matching the load characteristics required for different test conditions.

[0018] 3. The clutchable drive device of this utility model is equipped with a controllable clutch coupling, which is used to disconnect the power transmission between the DC motor and the cable roller during the test to prevent the DC motor from being damaged by the cable roller unwinding; the controllable clutch coupling reconnects the DC motor and the cable roller during the winding action, which facilitates the rapid winding operation of the cable roller. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the structure of this utility model after the first support has been removed; Figure 3 This is a schematic diagram of the adjustable braking mechanism from the front view. Figure 4 This is a schematic diagram of the adjustable braking mechanism from the rear view. Figure 5 This is a schematic diagram of a clutchable drive device; Figure 6 This is a schematic diagram of the structure of a controllable clutch coupling; Figure 7 This is an exploded view of a controllable clutch coupling.

[0020] In the diagram: 101, mounting plate; 102, first bracket; 103, rotating shaft; 104, cable roller; 105, cable; 201, second bracket; 202, brake arm; 203, brake pad; 204, brake disc; 205, brake lever; 206, leveling block; 207, elastic mechanism; 208, handwheel; 209, handle; 301, transmission sleeve; 302, transmission rod; 303, first pin; 304, limit pin; 305, drive mechanism; 306, third bracket. Detailed Implementation

[0021] Specific implementation method one: See Figure 1-2 As shown, a load simulation measurement device for a quay crane power system is provided. In this embodiment, it includes a mounting plate 101, a first bracket 102, a rotating shaft 103, a cable roller 104, a cable 105, an adjustable braking mechanism, and a clutchable drive device. A set of first brackets 102 is provided on the mounting plate 101. A rotating shaft 103 is rotatably connected to the first brackets 102. A cable roller 104 is fixedly sleeved on the rotating shaft 103. A cable 105 is wound around the cable roller 104. A clutchable drive device is provided on the mounting plate 101. The output end of the clutchable drive device is connected to the rotating shaft 103 for driving the cable roller 104 to rotate to wind up and unwind the cable 105. An adjustable braking mechanism is mounted on the mounting plate 101 and acts on the rotating shaft 103 to apply an adjustable braking force to the cable roller 104.

[0022] Furthermore, the mounting plate 101 is a plate-shaped structure, serving a fixing and supporting function. Bolt holes are provided at the four corners of the mounting plate 101 for easy fixing to the base using bolts. Two first brackets 102 are provided, and the first brackets 102 are fixedly connected to the mounting plate 101 by welding. Two shaft holes are provided at the top of the first bracket 102, and the rotating shaft 103 is rotatably connected to the first bracket 102 via bearings. The cable roller 104 is a cylindrical structure with retaining rings at both ends to prevent axial slippage of the cable 105. The cable roller 104 is coaxially fixed to the rotating shaft 103 by bolts. One end of the cable 105 is fixedly connected to the cable roller 104, and the other end is used to connect to the hoisting motor or trolley whose power is to be measured. The output end of the clutchable drive device is connected to the cable roller 104 for transmission, thereby driving the cable roller 104 to perform winding operations. The adjustable braking mechanism applies adjustable braking force to the cable roller 104.

[0023] During testing, cable 105 is connected to the hoisting motor or trolley with the power to be tested. The connection between cable roller 104 and the clutchable drive device is disconnected. The hoisting motor or trolley with the power to be tested is started, causing it to drive cable 105 to perform a unidirectional unwinding operation from cable roller 104. The braking force of the braking mechanism is adjusted to simulate the load resistance under different working conditions, thereby testing the power output of the hoisting motor or trolley under different load conditions. After the test, cable roller 104 is connected to the clutchable drive device, and the clutchable drive device is started, causing cable roller 104 to reverse and rewind, completely retrieving cable 105 onto cable roller 104.

[0024] Specific Implementation Method Two: See Figure 3-4 As shown, the adjustable braking mechanism of this embodiment includes a second bracket 201, a brake arm 202, a brake pad 203, a brake disc 204, a brake lever 205, a leveling block 206, an elastic mechanism 207, and a handwheel 208. The second bracket 201 is fixed on the mounting plate 101. The lower ends of the two brake arms 202 are respectively hinged to the front and rear sides of the second bracket 201. A brake disc 204 is fixedly sleeved on the rotating shaft 103. Brake pads 203 are installed on both brake arms 202. The two brake pads 203 are symmetrically arranged on both sides of the brake disc 204. The upper end of one brake arm 202 is hinged to one end of the brake lever 205. The upper end of the other brake arm 202 is hinged to a leveling block 206. The other end of the brake lever 205 slides through the leveling block 206. The handwheel 208 is installed on the end of the brake lever 205 by threaded engagement. The elastic mechanism 207 is sleeved on the brake lever 205 and located between the handwheel 208 and the leveling block 206.

[0025] Furthermore, an adjustable braking mechanism is used to continuously and adjustably apply braking force to the cable roller 104. The second bracket 201 has a U-shaped cross-section and bolt holes at its bottom for mounting the second bracket 201 to the mounting plate 101. Two shaft holes are provided at both ends of the two side flanges of the second bracket 201 for mounting the lower hinge shaft of the brake arm 202. The brake arm 202 extends upward and is positioned on both sides of the brake disc 204. The brake disc 204 is fitted onto the rotating shaft 103 and fixedly connected to the rotating shaft 103 by bolts. The brake pad 203 is tightly fitted to the side wall of the brake disc 204 to ensure uniform and stable friction during braking. Both brake arms 202 have shaft holes at their upper ends. One brake arm 202's upper shaft hole is hinged to the brake rod 205, and the other brake arm 202's upper shaft hole is used to mount the hinge shaft of the leveling block 206. The leveling block 206 has a through hole in its center for the brake rod 205 to slide through. The inner diameter of the handwheel 208 is threaded, which mates with the thread on the outer wall of the brake lever 205.

[0026] During operation, rotating the handwheel 208 causes the handwheel 208 to push the elastic mechanism 207 to compress via the thread. The compression of the elastic mechanism 207 changes linearly with the depth of rotation of the handwheel 208. The elastic mechanism 207 pushes the two brake arms 202 to apply pressure to the brake disc 204 simultaneously, thereby achieving continuous linear adjustment of the braking force and accurately matching the load characteristics required for different test conditions.

[0027] Specific implementation method three: See Figure 3-4 As shown, the elastic mechanism 207 in this embodiment is a spring, with the two ends of the spring abutting against the handwheel 208 and the leveling block 206, respectively.

[0028] Detailed Implementation Method Four: See [link] Figure 3-4 As shown, in this embodiment, the brake pad 203 is detachably fixed to the brake arm 202 by bolts.

[0029] Furthermore, the brake pad 203 is detachably fixed to the brake arm 202, facilitating quick replacement after wear.

[0030] Specific implementation method five: See Figure 5-7 As shown, the clutchable drive device of this embodiment includes a controllable clutch coupling, a third bracket 306 and a drive mechanism 305. The third bracket 306 is fixed on the mounting plate 101, and the drive mechanism 305 is fixed on the third bracket 306. The output shaft of the drive mechanism 305 is coaxially connected to the rotating shaft 103 through a controllable clutch coupling. The controllable clutch coupling is used to realize the controllable transmission and separation of power between the drive mechanism 305 and the rotating shaft 103.

[0031] Furthermore, the third bracket 306 is a hollow rectangular structure with bolt holes at its bottom for mounting the third bracket 306 to the mounting plate 101 using bolts; the top of the third bracket 306 also has bolt holes for fixing the drive mechanism 305 to the top of the third bracket 306 using bolts. The controllable clutch coupling is used during testing to disconnect the power transmission between the DC motor and the cable roller 104, preventing damage to the equipment caused by the cable roller 104 releasing rope; the controllable clutch coupling reconnects the DC motor and the cable roller 104 during the winding operation, facilitating rapid winding of the cable roller 104.

[0032] Specific implementation method six: See Figure 5-7 As shown, the controllable clutch coupling of this embodiment includes a transmission sleeve 301, a transmission rod 302, and a first pin 303. The transmission sleeve 301 is coaxially and fixedly connected to the rotating shaft 103. The transmission rod 302 is rotatably connected inside the transmission sleeve 301. The end of the transmission rod 302 is fixedly connected to the output shaft of the drive mechanism 305. The first pin 303 is radially and detachably inserted through the transmission sleeve 301 and the transmission rod 302.

[0033] Furthermore, the transmission sleeve 301 is a hollow cylindrical structure, and its end is fixedly connected to the rotating shaft 103 via a flange; the transmission rod 302 is a cylindrical structure and is rotatably connected to the internal cavity of the transmission sleeve 301, and the transmission rod 302 is fixedly connected to the output shaft of the drive mechanism 305 via a coupling. Corresponding radial through holes are provided on the transmission sleeve 301 and the transmission rod 302, and the first pin 303 is detachably inserted through the transmission sleeve 301 and the transmission rod 302 to achieve rigid connection and rapid separation between the transmission sleeve 301 and the transmission rod 302.

[0034] During the test, the first pin 303 is pulled out, separating the transmission sleeve 301 from the transmission rod 302. At this time, there is no power transmission between the drive mechanism 305 and the rotating shaft 103, and the cable roller 104 enters the free rope release state. After the test, the first pin 303 is reinserted into the corresponding through holes of the transmission sleeve 301 and the transmission rod 302, restoring the rigid connection between the drive mechanism 305 and the rotating shaft 103, and preparing for the subsequent cable retrieval operation.

[0035] Detailed implementation method seven: See Figure 5-7 As shown, a limiting pin 304 is provided on the first pin 303 in this embodiment. The limiting pin 304 is used to limit the axial movement of the first pin 303.

[0036] Furthermore, the first pin 303 has a pin hole, and the limiting pin 304 is detachably inserted into the pin hole of the first pin 303 to prevent it from accidentally coming out under vibration conditions.

[0037] Detailed Implementation Method Eight: See also Figure 5 As shown, the drive mechanism 305 in this embodiment uses a DC motor.

[0038] Furthermore, the DC motor is connected to the output end of the transmission rod 302 via a coupling, and the DC motor is fixed to the third bracket 306 by bolts.

[0039] Detailed Implementation Method Nine: See also Figure 3-4 As shown, a handle 209 is rotatably connected to the handwheel 208 in this embodiment.

[0040] Furthermore, the handwheel 208 has a shaft hole, and the handle 209 is rotatably connected in the shaft hole, and the handle 209 can rotate around the center of the shaft hole.

[0041] Detailed Implementation Method 10: See [link / details] Figure 3-4 As shown, a scale is provided on the brake lever 205 in this embodiment.

[0042] Furthermore, a scale is knurled onto the surface of the brake lever 205 to visually observe the relationship between the braking stroke and the braking torque.

[0043] During the test operation, the cable 105 is connected to the hoisting motor or trolley with the power to be tested. Then, the first pin 303 is pulled out, separating the transmission sleeve 301 from the transmission rod 302. The hoisting motor or trolley with the power to be tested is started, causing it to drive the cable 105 to perform a unidirectional cable release operation from the cable roller 104. The handwheel 208 is rotated, and the handwheel 208 pushes the elastic mechanism 207 to compress through the thread. The elastic mechanism 207 pushes the two brake arms 202 to apply pressure to the brake disc 204 simultaneously, thereby simulating different loads on the quay crane. A speed sensor is installed at the hoisting motor or trolley motor of the quay crane, and an ammeter and voltmeter are installed at the control end. By recording the real-time current, voltage and cable release speed parameters of the hoisting motor or trolley motor, the test data acquisition is completed. After the test, the first pin 303 is reinserted into the corresponding through hole of the transmission sleeve 301 and the transmission rod 302 to restore the transmission between the DC motor and the rotating shaft 103. At this time, the DC motor is powered on and started, driving the cable roller 104 to complete the winding operation.

[0044] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A load simulation and measurement device for a quay crane power system, characterized in that: It includes a mounting plate (101), a first bracket (102), a rotating shaft (103), a cable roller (104), a cable (105), an adjustable braking mechanism, and a clutchable drive device; A set of first brackets (102) is provided on the mounting plate (101), the rotating shaft (103) is rotatably connected to the first brackets (102), the cable roller (104) is fixedly sleeved on the rotating shaft (103), and the cable (105) is wound on the cable roller (104); A clutchable drive device is provided on the mounting plate (101). The output end of the clutchable drive device is connected to the rotating shaft (103) for driving the cable roller (104) to rotate to wind up and unwind the cable (105). An adjustable braking mechanism is mounted on the mounting plate (101) and acts on the rotating shaft (103) to apply an adjustable braking force to the cable roller (104).

2. The load simulation and measurement device for the quay crane power system according to claim 1, characterized in that: The adjustable braking mechanism includes a second bracket (201), a brake arm (202), a brake pad (203), a brake disc (204), a brake lever (205), a leveling block (206), an elastic mechanism (207), and a handwheel (208). The second bracket (201) is fixed on the mounting plate (101). The lower ends of the two brake arms (202) are respectively hinged to the front and rear sides of the second bracket (201). A brake disc (204) is fixedly sleeved on the rotating shaft (103). Brake pads (203) are installed on both brake arms (202). The two brake pads (203) are symmetrically arranged on both sides of the brake disc (204). The upper end of one brake arm (202) is hinged to one end of the brake lever (205). The upper end of the other brake arm (202) is hinged to a leveling block (206). The other end of the brake lever (205) slides through the leveling block (206). The handwheel (208) is installed on the end of the brake lever (205) through a threaded connection. The elastic mechanism (207) is sleeved on the brake lever (205) and located between the handwheel (208) and the leveling block (206).

3. The load simulation and measurement device for the quay crane power system according to claim 2, characterized in that: The elastic mechanism (207) is a spring, with its two ends abutting against the handwheel (208) and the leveling block (206), respectively.

4. The load simulation and measurement device for the quay crane power system according to claim 2, characterized in that: The brake pad (203) is detachably fixed to the brake arm (202) by bolts.

5. The load simulation and measurement device for the quay crane power system according to claim 1, characterized in that: The clutchable drive unit includes a controllable clutch coupling, a third bracket (306), and a drive mechanism (305). The third bracket (306) is fixed on the mounting plate (101), and the drive mechanism (305) is fixed on the third bracket (306). The output shaft of the drive mechanism (305) is coaxially connected to the rotating shaft (103) through a controllable clutch coupling. The controllable clutch coupling is used to realize the controllable transmission and separation of power between the drive mechanism (305) and the rotating shaft (103).

6. The load simulation and measurement device for the quay crane power system according to claim 5, characterized in that: The controllable clutch coupling includes a transmission sleeve (301), a transmission rod (302), and a first pin (303). The transmission sleeve (301) is coaxially and fixedly connected to the rotating shaft (103). The transmission rod (302) is rotatably connected inside the transmission sleeve (301). The end of the transmission rod (302) is fixedly connected to the output shaft of the drive mechanism (305). The first pin (303) is radially and detachably inserted through the transmission sleeve (301) and the transmission rod (302).

7. The load simulation and measurement device for the quay crane power system according to claim 6, characterized in that: A limiting pin (304) is provided on the first pin (303), and the limiting pin (304) is used to limit the axial movement of the first pin (303).

8. The load simulation and measurement device for the quay crane power system according to claim 5, characterized in that: The drive mechanism (305) uses a DC motor.

9. The load simulation and measurement device for the quay crane power system according to claim 2, characterized in that: A handle (209) is rotatably connected to the handwheel (208).

10. The load simulation and measurement device for the quay crane power system according to claim 2, characterized in that: A scale is provided on the brake lever (205).

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