A nuclear power plant electrical instrument panel cabinet transfer device

Abstract

This application relates to the field of transportation equipment technology, and discloses a transfer device for electrical instrumentation cabinets in nuclear power plants, comprising: a hydraulic pallet truck, including a chassis, wheel assembly, and lifting mechanism; a fork mechanism, which is adjustable in angle to one end of the chassis in the direction of travel via a tilting mechanism; the fork mechanism includes a mast and fork arm assemblies vertically connected to the mast, with the electrical instrumentation cabinets supported by the fork arm assemblies and abutting against the mast; wherein, the tilting mechanism is configured to drive the fork mechanism to tilt relative to the chassis within an angle range of 0° to 90° to a preset tilt angle; the lifting mechanism is configured to drive the fork mechanism to rise and fall with the chassis. This application can tilt the electrical instrumentation cabinets loaded on the fork mechanism to a suitable preset tilt angle, solving the problem that traditional handling equipment cannot flexibly transfer electrical instrumentation cabinets in narrow spaces, and has a simple structure and is easy to operate, improving the flexibility and ease of operation of the transfer device for electrical instrumentation cabinets.

Description

Technical Field

[0001] This utility model relates to the field of transportation equipment technology, and in particular to a transfer device for electrical instrumentation cabinets in nuclear power plants. Background Technology

[0002] In the operation and maintenance of nuclear power plants, electrical instrumentation panels (such as distribution cabinets and control cabinets) need to be installed and decommissioned. Due to the compact internal space design of nuclear power plants, the door frames in areas such as corridors and some equipment rooms are narrow (e.g., the door of the skills center is 1400mm wide and 2070mm high), while the upright height of some electrical instrumentation panels far exceeds the door frame limitations. Traditional handling methods usually require the removal of door frames or parts of walls, which is not only time-consuming and labor-intensive but also increases costs. Existing handling equipment cannot tilt electrical instrumentation panels to the appropriate angle to pass through low door frames, failing to meet the operational needs of flexibly moving electrical instrumentation panels within the confined spaces of nuclear power plants. Utility Model Content

[0003] To address the aforementioned technical problems, this application provides a nuclear power plant instrumentation cabinet transfer device, resolving the technical issue that existing handling equipment cannot meet the operational requirements for flexible transfer of instrumentation cabinets within the confined spaces of a nuclear power plant. The nuclear power plant instrumentation cabinet transfer device provided by this application can tilt the instrumentation cabinets loaded on the forklift mechanism to a suitable preset tilt angle, solving the problem that traditional handling equipment cannot flexibly transfer instrumentation cabinets in narrow spaces.

[0004] This application provides a transfer device for electrical instrumentation cabinets in a nuclear power plant. The transfer device includes: a hydraulic pallet truck, comprising a chassis, a wheel assembly mounted on the chassis, and a lifting mechanism for controlling the chassis to move up and down relative to the wheel assembly; a fork mechanism, which is adjustablely connected to one end of the chassis in the direction of travel via a tilting mechanism; the fork mechanism includes a mast, fork arm assemblies vertically connected to the bottom end of the mast and extending outward, with the electrical instrumentation cabinet supported by the fork arm assemblies and abutting against the mast; wherein the tilting mechanism is configured to drive the fork mechanism to tilt relative to the chassis within an angle range of 0° to 90° to a preset tilt angle; and the lifting mechanism is configured to drive the fork mechanism to move up and down with the chassis.

[0005] In some embodiments, the tilting mechanism includes: a first hinge connected between the lower part of the gantry and one end of the chassis in the direction of travel, the first hinge including a first hinge axis, the gantry tilting about the first hinge axis; a telescopic drive member, the upper end of the telescopic drive member being hinged to the gantry via a second hinge, the lower end of the telescopic drive member being movably hinged to the chassis via a third hinge; the second hinge being disposed away from the first hinge, the second hinge including a second hinge axis; the third hinge being disposed away from the first hinge, the third hinge including a third hinge axis; wherein the first hinge axis, the second hinge axis, and the third hinge axis all extend along a first direction, the first direction being perpendicular to the direction of travel of the chassis and parallel to the chassis.

[0006] In some embodiments, the telescopic drive includes any one or more of an electric cylinder, a pneumatic cylinder, and a hydraulic cylinder.

[0007] In some embodiments, the telescopic drive is an electric cylinder, and the transfer device further includes: a power supply module, detachably connected to the chassis and electrically connected to the electric cylinder, for supplying power; and a control module, electrically connected to the power supply module and the electric cylinder, for controlling the operation of the transfer device.

[0008] In some embodiments, the wheel set includes a drive wheel, which is directly driven by a hub motor, and the control module and the power supply module are electrically connected to the hub motor.

[0009] In some embodiments, the control module includes a remote controller, which is electrically connected to the electric cylinder and / or the hub motor and / or the lifting mechanism via a wired or wireless connection, for controlling the tilting of the fork mechanism and / or controlling the movement of the hydraulic pallet truck and / or controlling the lifting of the fork mechanism.

[0010] In some embodiments, the transfer device further includes: an angle sensor disposed between the hydraulic pallet truck and the fork mechanism, and electrically connected to the control module; the angle sensor is configured to detect the tilt angle of the mast relative to the chassis and send an angle detection signal to the control module; wherein, when the control module determines based on the angle detection signal that the tilt angle of the mast has reached a preset maximum or minimum tilt angle, it automatically controls the electric cylinder to stop its extension and retraction action.

[0011] In some embodiments, the second hinge is adjustablely connected to the gantry so that the second hinge can be adjusted to be relatively far away from or relatively close to the first hinge.

[0012] In some embodiments, the tilting mechanism further includes: an adjustment groove disposed on the side of the gantry facing away from the fork arm assembly, the adjustment groove extending along a second direction, and the second hinge slidably connected to the adjustment groove; the second direction is the height direction of the gantry and is perpendicular to the first direction; and a limiting structure disposed between the adjustment groove and the second hinge for limiting the installation position of the second hinge on the adjustment groove.

[0013] In some embodiments, the transfer device further includes a counterweight assembly detachably connected to the chassis and located relatively away from the fork arm assembly; wherein the counterweight assembly includes: a first counterweight block detachably connected to the chassis; a rod vertically connected to the first counterweight block; and a plurality of second counterweight blocks, each of which has a through-hole for engaging with the rod, the second counterweight blocks being detachably connected to the first counterweight block through the through-hole and the rod.

[0014] The nuclear power plant instrumentation cabinet transfer device provided in this application includes a hydraulic pallet truck and a fork mechanism connected to one end of the chassis of the hydraulic pallet truck in the direction of travel via a tilting mechanism. In use, the lifting mechanism on the hydraulic pallet truck can control the lifting of the chassis and the fork mechanism, and the tilting mechanism can control the tilting angle of the fork mechanism, thereby tilting the instrumentation cabinet loaded on the fork mechanism to a suitable preset tilting angle. This significantly reduces the overall height of the instrumentation cabinet during transfer and solves the problem that traditional handling equipment cannot flexibly transfer instrumentation cabinets in narrow spaces.

[0015] Furthermore, this application eliminates the related mechanisms or components on the fork mechanism used to control the lifting and lowering of the fork arm assembly, simplifies the structural design of the fork mechanism, reduces the cost and failure rate of the fork mechanism, and is conducive to weight reduction of the fork mechanism, which is beneficial to improving the travel stability and flexibility of the hydraulic pallet truck.

[0016] In addition, this application uses a hydraulic pallet truck as the transfer vehicle body of the transfer device. The hydraulic pallet truck can be a commercially available hydraulic pallet truck, commonly known as a "floor jack". It has a simple structure and is convenient for transfer operations, which significantly improves the flexibility and ease of operation of the transfer device for transferring electrical instrument cabinets. Attached Figure Description

[0017] The technical solution of this application will be further described below with reference to the accompanying drawings and embodiments. In the accompanying drawings:

[0018] Figure 1 This is a front view structural schematic diagram of one embodiment of the transfer device of this application;

[0019] Figure 2 yes Figure 1A magnified schematic diagram of the local structure at point S1;

[0020] Figure 3 This is a three-dimensional structural schematic diagram of one embodiment of the transfer device of this application;

[0021] Figure 4 yes Figure 3 Enlarged schematic diagram of the local structure at point S2;

[0022] Figure 5 yes Figure 3 Enlarged schematic diagram of the local structure at point S3;

[0023] Figure 6 This is a schematic diagram of a hydraulic pallet truck structure according to one embodiment of the transfer device of this application.

[0024] The attached figures are labeled as follows:

[0025] 10-Hydraulic pallet truck, 11-Chassis, 111-Body fork arm, 112-Fork carriage, 113-Base plate, 12-Wheel set, 121-Drive wheel, 1211-Wheel hub motor, 122-Driven wheel, 123-Vertical connecting rod, 13-Lifting mechanism, 131-Control lever, 132-Hydraulic system, 1321-Cylinder, 1322-Pump, 1323-Pressure relief handle, 133-Drive wheel seat, 134-Hinge structure;

[0026] 20-Fork mechanism, 21-Mast, 211-Column, 212-Lower baffle, 213-Upper baffle, 214-Anti-slip mat, 22-Fork arm assembly, 221-Fork;

[0027] 30-Tilting mechanism, 31-First hinge, 311-First hinge shaft, 312-First support arm, 313-First hinge seat, 32-Telescopic drive component, 33-Second hinge, 331-Second hinge shaft, 332-Second support arm, 34-Third hinge, 341-Third hinge shaft, 342-Second hinge seat, 35-Adjusting groove, 351-Positioning hole, 36-Fixing bolt;

[0028] 40-Power supply module; 50-Control module; 51-Remote control; 511-Control button; 60-Angle sensor; 70-Counterweight assembly; 71-First counterweight block; 711-Plug; 72-Second counterweight block. Detailed Implementation

[0029] To make the objectives, technical solutions, and effects of this utility model clearer and more explicit, the technical solutions of this utility model will be further described in detail below through specific embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0030] Please see Figure 1 In some embodiments of this application, a transfer device for electrical instrumentation cabinets in nuclear power plants is provided for transferring electrical instrumentation cabinets within confined spaces in nuclear power plants. This transfer device includes a hydraulic pallet truck 10 and a forklift mechanism 20. The hydraulic pallet truck 10 includes a chassis 11, wheel sets 12 mounted on the chassis 11, and a lifting mechanism 13 that controls the lifting and lowering of the chassis 11 relative to the wheel sets 12. The hydraulic pallet truck 10 can be a commercially available hydraulic pallet truck, commonly known as a "floor jack".

[0031] The fork mechanism 20 is angularly adjustable to one end of the chassis 11 in the travel direction via a tilting mechanism 30. The fork mechanism 20 includes a mast 21 and a fork arm assembly 22 vertically connected to the bottom of the mast 21 and extending outwards. The electrical control panel is supported by the fork arm assembly 22 and can abut against the mast 21. The travel direction end can be either the front or rear end of the hydraulic pallet truck 10 in the travel direction; this application does not limit this. In this embodiment, the fork mechanism 20 is described as being connected to the rear end of the chassis 11 in the travel direction.

[0032] The tilting mechanism 30 is configured to drive the fork mechanism 20 to tilt relative to the chassis 11 to a preset tilt angle within an angle range of 0° to 90°. The lifting mechanism 13 is configured to drive the fork mechanism 20 to rise and fall with the chassis 11.

[0033] To facilitate understanding of the technical solution of this application, the following defines the traveling direction of the chassis 11 of the hydraulic pallet truck 10, i.e. the length direction of the chassis 11, as the Y-axis, the width direction of the chassis 11 of the hydraulic pallet truck 10 as the X-axis, and the vertical direction as the Z-axis. The X-axis, Y-axis, and Z-axis are perpendicular to each other.

[0034] In actual use, the lifting mechanism 13 can first control the chassis 11 of the hydraulic pallet truck 10 to rise to a suitable height along the Z-axis, so that the tilting mechanism 30 can smoothly drive the fork mechanism 20 to tilt within the angle range of 0° to 90°. When loading the electrical instrument cabinet, the transfer device can first be moved to the front of the electrical instrument cabinet, and the tilting mechanism 30 can be used to tilt the mast 21 of the fork mechanism 20 to 90° relative to the chassis 11 of the hydraulic pallet truck 10, so that the mast 21 is tilted to an upright position and the fork arm assembly 22 is tilted to a horizontal position. Then, the lifting mechanism 13 can control the chassis 11 to descend along the Z-axis until the fork arm assembly 22 is close to the ground. At this time, the operator can apply an outward pushing force to the top of the upright electrical instrument cabinet, causing the front side of the bottom of the electrical instrument cabinet to tilt slightly, so that the hydraulic pallet truck 10 can travel along the Y-axis to insert the fork arm assembly 22 into the gap at the bottom of the electrical instrument cabinet. After the electrical instrument panel is stably supported by the fork arm assembly 22 and abuts against the mast 21, it can be secured to the mast 21 with straps to prevent it from swaying. Then, the lifting mechanism 13 drives the chassis 11 to rise along the Z-axis to a suitable height, and the tilting mechanism 30 drives the fork mechanism 20 to tilt to a suitable preset tilt angle, so that the electrical instrument panel tilts towards the chassis 11 of the hydraulic pallet truck 10, reducing the overall height of the electrical instrument panel during the transfer process. Then, after the operator pulls the hydraulic pallet truck to move the electrical instrument panel to the set position, the chassis 11 of the hydraulic pallet truck 10 can be lowered to a suitable height along the Z-axis by the lifting mechanism 13. Then, the fork mechanism 20 is tilted to 90° by the tilting mechanism 30, so that the electrical instrument panel is in an upright position and the fork arm assembly 22 is close to or in contact with the ground, so that the operator can remove the straps and then unload the electrical instrument panel from the fork mechanism 20 along the Y-axis, thus completing the transfer of the electrical instrument panel.

[0035] The nuclear power plant instrumentation cabinet transfer device provided in this application controls the lifting of the chassis 11 of the hydraulic pallet truck 10 through the lifting mechanism 13 on the hydraulic pallet truck 10, and controls the tilting angle of the mast 21 and fork arm assembly 22 of the fork mechanism 20 through the tilting mechanism 30. With the cooperation of the two, the instrumentation cabinet loaded on the fork mechanism 20 is tilted to a suitable preset tilting angle, realizing the precise adjustment of the tilting angle of the instrumentation cabinet, and enabling the instrumentation cabinet to be transferred in a tilted or sideways posture. This significantly reduces the overall height of the instrumentation cabinet during transfer, breaks through the door frame height limitation, ensures that the instrumentation cabinet can safely pass through the low door frame, significantly improves the flexibility of instrumentation cabinet transfer, and solves the problem that traditional handling equipment cannot flexibly transfer instrumentation cabinets in narrow spaces.

[0036] Moreover, the nuclear power plant electrical panel transfer device provided in this application eliminates the related mechanisms or components used to control the lifting and lowering of the fork arm assembly 22 compared to the existing forklift fork mechanism 20. The lifting and lowering control of the fork arm assembly 22 is instead completed by the lifting mechanism 13 of the hydraulic pallet truck 10 itself, which simplifies the structural design of the fork mechanism 20, reduces the number of components of the fork mechanism 20, lowers the cost and failure rate of the fork mechanism 20, and is conducive to the weight reduction of the fork mechanism 20, which is conducive to improving the travel stability and flexibility of the hydraulic pallet truck 10.

[0037] In addition, the nuclear power plant instrumentation cabinet transfer device provided in this application uses a hydraulic pallet truck 10 as the transfer vehicle body. The hydraulic pallet truck 10 can be a commercially available manual or electric hydraulic pallet truck 10, commonly known as a "floor jack". No additional modification is required to the functional mechanism of the hydraulic pallet truck 10. The lifting mechanism 13 can control the lifting of the chassis 11. The structure is simple and convenient for transfer operations, which significantly improves the flexibility and ease of operation of the transfer device for transferring instrumentation cabinets.

[0038] Please see Figure 3 In some embodiments, the gantry 21 includes two columns 211, a lower baffle 212 fixedly connected to the lower part of the two columns 211 along the X-axis, and an upper baffle 213 fixedly connected to the upper part of the two columns 211 along the X-axis. When the gantry 21 is tilted to 90° relative to the chassis 11, the columns 211 are in an upright state, and at this time the height direction of the columns 211 is consistent with the Z-axis.

[0039] The fork arm assembly 22 includes two L-shaped forks 221. The short sides of the L-shaped forks 221 are attached to and fixed to the lower baffle 212 and the corresponding upright 211 of the mast 21, so that the long sides of the forks 221 extend outward perpendicular to the mast 21.

[0040] In some other embodiments, the gantry 21 may also include three or more uprights 211, and may also include at least one intermediate baffle located between the upper baffle 213 and the lower baffle 212. The more uprights 211 and baffles are provided, the higher the overall structural strength of the gantry 21 and the less likely it is to deform.

[0041] Please see Figure 3 In some embodiments, the fork mechanism 20 further includes an anti-slip pad 214. The anti-slip pad 214 can be disposed on the front end face of the mast 21 facing the fork arm assembly 22. The anti-slip pad 214 can cover the entire front end face of the mast 21 or partially cover the front end face of the mast 21. When the electrical instrument cabinet is loaded on the fork mechanism 20, the anti-slip pad 214 is clamped between the side wall of the electrical instrument cabinet and the mast 21, which can play a role in anti-slip and shock absorption, avoiding hard contact between the electrical instrument cabinet and the mast 21, and preventing the electrical instrument cabinet from being bumped during transportation.

[0042] In addition, anti-slip mats can also be installed on the upper surface of the forks. When the electrical instrument panel is loaded onto the fork mechanism, the anti-slip mats are clamped between the bottom wall of the electrical instrument panel and the forks, which can play a role in anti-slip and shock absorption, avoiding hard contact between the electrical instrument panel and the forks, and preventing the electrical instrument panel from being bumped during transportation.

[0043] Please see Figure 6 In some embodiments, the chassis 11 of the hydraulic pallet truck 10 includes two vehicle body forks 111 arranged correspondingly along the Y-axis, and a fork 112 fixedly connected to the other end of the two vehicle body forks 111 in the travel direction. The other end in the travel direction refers to the end facing away from the fork mechanism 20, that is, the fork 112 and the fork mechanism 20 are located at the two ends of the chassis 11 in the Y-axis direction.

[0044] The lifting mechanism 13 includes a control lever 131, a hydraulic system 132, a drive wheel seat 133, and a hinge structure 134. The wheel assembly 12 includes a drive wheel 121 and a driven wheel 122. The hydraulic system 132 can be a manual hydraulic system or an electro-hydraulic system; this application does not limit its application to either. The hydraulic system 132 includes a hydraulic pump assembly and a control valve assembly. The drive wheel 121 is rotatably connected to the bottom of the drive wheel seat 133 via a vertical connecting rod 123 perpendicular to its axis of rotation. The hydraulic pump assembly is rotatably connected between the top of the drive wheel seat 133 and the fork 112, and is fixedly connected to the vertical connecting rod 123.

[0045] The hydraulic pump assembly includes a cylinder 1321 and a pump 1322. The cylinder body of cylinder 1321 is connected to a vertical connecting rod 123, and the telescopic rod of cylinder 1321 is connected to a fork 112. The pump 1322 is connected to cylinder 1321 and is used to inject hydraulic oil into cylinder 1321. The lower end of control lever 131 is movably hinged to the cylinder body of cylinder 1321, and control lever 131 is drively connected to pump 1322. Pump 132 can be manually driven to inject oil into cylinder 1321 by repeatedly pressing control lever 131. Alternatively, control lever 131 can drive the hydraulic pump assembly to rotate drive wheel 121 around vertical connecting rod 123, thereby achieving steering of drive wheel 121. The control valve group includes a pressure relief handle 1323 located on the upper part of control lever 131 for manually operating pump 1322 to relieve pressure.

[0046] There are two sets of driven wheels 122, which are respectively set on the lower part of the two vehicle body forks 111 near the end of the chassis 11 in the direction of travel. The hinge structure 134 movably hinges the drive wheel seat 133 to the fork 112, and the hinge structure 134 hinges the drive wheel seat 133 to the driven wheels 122 and the vehicle body forks 111.

[0047] In use, when the operator manually presses the control lever 131 repeatedly downwards, the oil pump 1322 is manually driven by the control lever 131 to continuously inject hydraulic oil into the oil cylinder 1321, so that the telescopic rod of the oil cylinder 1321 supports the fork 112. During this process, the chassis 11 rises relative to the drive wheel 121 and driven wheel 122 under the action of the hinge structure 134, thereby raising the fork mechanism 20. When the operator presses the pressure relief handle 1323, the control valve group controls the oil pump 1322 to release pressure, and the hydraulic oil continuously flows out of the oil cylinder 1321. The telescopic rod of the oil cylinder 1321 retracts. During this process, the chassis 11 descends relative to the drive wheel 121 and driven wheel 122 under the action of the hinge structure 134, thereby lowering the fork mechanism 20.

[0048] The drive wheel 121 can be configured to be driven without a power source, moving only by the pulling or pushing force applied by the operator to the control lever 131. The operator manually drives the hydraulic pallet truck 10 by pulling the control lever 131 and controls the direction of travel through the control lever 131.

[0049] Please see Figure 1 and Figure 4 In some embodiments, the tilting mechanism 30 includes a first hinge 31, a telescopic drive member 32, a second hinge 33, and a third hinge 34. The first hinge 31 is connected between the lower part of the gantry 21 and the traveling end of the chassis 11. The first hinge 31 includes a first hinge pin 311 (e.g., Figure 4 As shown in the diagram, the gantry 21 tilts about the first hinge axis 311.

[0050] The telescopic drive component 32 includes any one or more of an electric cylinder, a pneumatic cylinder, and a hydraulic cylinder. In this embodiment, an electric cylinder is used as an example. The electric cylinder adopts a commercially available electric push rod with a stroke ≥ 800 mm and a thrust ≥ 10000 N.

[0051] The upper end of the telescopic drive member 32, i.e., the electric push rod, is hinged to the gantry 21 via the second hinge 33, and the lower end of the telescopic drive member 32 is movably hinged to the chassis 11 via the third hinge 34. The electric push rod can be set in an upright or inverted position, and this application does not limit this. In this embodiment, the electric push rod is set in an upright position, with the upper end of its telescopic rod hinged to the gantry 21 via the second hinge 33, and the lower end of its main body hinged to the chassis 11 via the third hinge 34.

[0052] Please see Figure 2 The second hinge 33 is located away from the first hinge 31, that is, the second hinge 33 is connected to the middle position of the gantry 21. The second hinge 33 includes a second hinge shaft 331. When the telescopic rod of the electric push rod moves in extension and retraction, the gantry 21 and the telescopic rod of the electric push rod rotate around the second hinge shaft 331 as the rotation center.

[0053] Please see Figure 4 The third hinge 34 is located away from the first hinge 31, that is, the third hinge 34 is connected to the middle position of the chassis 11 in the direction of travel. The third hinge 34 includes a third hinge shaft 341. When the telescopic rod of the electric push rod moves in extension and retraction, the lower end of the electric push rod rotates around the third hinge shaft 341 as the rotation center.

[0054] Among them, the first hinge shaft 311, the second hinge shaft 331, and the third hinge shaft 341 all extend along a first direction, which is perpendicular to the traveling direction of the chassis 11 and parallel to the chassis 11. That is, the first direction is perpendicular to the Y-axis and parallel to the X-axis of the horizontal plane, and the first hinge shaft 311, the second hinge shaft 331, and the third hinge shaft 341 all extend along the X-axis.

[0055] Please see Figure 4 In some embodiments, the first hinge 31 further includes a first support arm 312 and a first hinge seat 313. The first support arm 312 is disposed on the back side of the gantry 21 facing away from the fork arm assembly 22, and is disposed close to the fork arm assembly 22. At least one first support arm 312 is provided. When there is only one first support arm 312, it can be disposed at the lower middle position of the back side of the gantry 21; when there are two or more first support arms 312, they can be arranged in an orderly manner at the lower part of the back side of the gantry 21. The first support arm 312 extends away from the fork arm assembly 22, and each end of the first support arm 312 is provided with a first support arm hole (not shown in the figure) arranged along the X-axis. In this embodiment, two first support arms 312 are used as an example for description. The two first support arms 312 are respectively fixedly connected to the bottom back side of the two columns 211 of the gantry 21.

[0056] The number of first hinge seats 313 matches the number of first support arms 312. In this embodiment, two are used as an example. The two first hinge seats 313 are respectively set at one end of the chassis 11 in the traveling direction. Specifically, the two first hinge seats 313 are respectively set at the rear end of the corresponding vehicle body fork arm 111. Each first hinge seat 313 is provided with a first hinge seat hole (not shown in the figure). Each first hinge seat 313 is movably hinged to the corresponding first support arm 312 through a first hinge shaft 311 inserted into the first support arm hole and the first hinge seat hole.

[0057] Please see Figure 2 and Figure 3In some embodiments, the second hinge 33 further includes a second support arm 332, which is disposed on the back side of the gantry 21 facing away from the fork arm assembly 22, and is disposed away from the fork arm assembly 22. At least one second support arm 332 is provided. When there is only one second support arm 332, it can be disposed at the middle position of the upper part of the back side of the gantry 21; when there are two or more second support arms 332, they can be arranged in the middle and upper positions of the back side of the gantry 21. The second support arms 332 extend away from the fork arm assembly 22, and each second support arm 332 has a second support arm hole (not shown in the figure) arranged along the X-axis at its end. In this embodiment, two second support arms 332 are used as an example, and the two second support arms 332 are respectively disposed on the middle and upper parts of the back side of the two columns 211 of the gantry 21.

[0058] Please see Figure 5 In some embodiments, the third hinge 34 further includes a second hinge seat 342. The number of second hinge seats 342 matches the number of second support arms 332. In this embodiment, two are used as an example. The two second hinge seats 342 are located at the center of the chassis 11 and are spaced apart from the first hinge seat 313. Specifically, the two second hinge seats 342 are respectively located at the center of the corresponding vehicle body fork arm 111. Each second hinge seat 342 is provided with a second hinge seat hole (not shown in the figure) arranged along the X-axis.

[0059] The number of telescopic drive components 32 matches the number of second support arms 332. The upper end of the telescopic drive component 32 (i.e., the upper end of the push rod of the electric push rod) is provided with a push rod hole (not shown in the figure), and the lower end of the telescopic drive component 32 (i.e., the lower end of the main body of the electric push rod) is provided with a main body hole (not shown in the figure). The upper end of the push rod of the telescopic drive component 32 is movably hinged to the second support arm 332 through a second hinge shaft 331 inserted into the push rod hole and the second support arm hole. The lower end of the main body of the telescopic drive component 32 is movably hinged to the second hinge seat 342 through a third hinge shaft 341 inserted into the main body hole and the second hinge seat hole.

[0060] In use, the telescopic drive component 32, i.e., the push rod of the electric push rod, extends under electric drive, causing the gantry 21 to tilt around the first hinge axis 311 and the second hinge axis 331. During this process, the lower end of the main body of the electric push rod rotates around the third hinge axis 341. As the extension length of the push rod increases, the tilt angle of the gantry 21 also increases, and the fork arm assembly 22 gradually tilts to a horizontal state; as the extension length of the push rod decreases, the tilt angle of the gantry 21 also decreases, and the fork arm assembly 22 gradually tilts to a tilted state.

[0061] Please see Figures 4 to 5In some embodiments, to improve the overall structural strength of the chassis 11 of the hydraulic pallet truck and prevent deformation of the chassis 11, the chassis 11 further includes a base plate 113. The base plate 113 can be welded and fixed to the two vehicle body forks 111. The base plate 113 can be partially hollowed out at the position corresponding to the two vehicle body forks 111 to reduce the overall weight of the chassis 11. The first hinge seat 313 and the second hinge seat 342 can be welded and fixed to the base plate 113.

[0062] Please see Figure 1 and Figure 3 In some embodiments, the transfer device of this application further includes a power supply module 40 and a control module 50. The power supply module 40 is detachably connected to the base plate 113 of the chassis 11 and is electrically connected to the electric push rod to supply power to the electric push rod. The control module 50 is electrically connected to the power supply module 40 and the electric push rod to control the operation of the transfer device.

[0063] In use, the operator can control the operation of the electric push rod through the control module 50, thereby achieving precise adjustment of the tilt angle of the gantry 21 and the fork arm assembly 22.

[0064] Please see Figure 6 In some embodiments, the drive wheel 121 of the hydraulic pallet truck 10 can be a powered wheel, directly driven by a hub motor 1211. The control module 50 and the power supply module 40 are electrically connected to the hub motor 1211. The power supply module 40 supplies power to the hub motor 1211, and the control module 50 controls the operation of the hub motor 1211, enabling the drive wheel 121 to move autonomously. This reduces the physical exertion of operators and improves the efficiency of transferring electrical instrument panels.

[0065] Please see Figure 6 In some embodiments, the drive wheels 121 driven by the hub motors 1211 can adopt a parallel double-wheel design, with each drive wheel 121 driven by its own hub motor 1211. When the control module 50 controls the two hub motors 1211 to run synchronously, the two drive wheels 121 rotate at the same speed, and the hydraulic pallet truck 10 moves in a straight line; when the control module 50 controls the two hub motors 1211 to run differentially, the two drive wheels 121 rotate at different speeds, and the hydraulic pallet truck 10 turns. Thus, the parallel double-wheel design of the drive wheels 121 enables autonomous steering control of the hydraulic pallet truck 10, further improving the flexibility of transporting electrical instrument cabinets.

[0066] Please see Figure 1In some embodiments, the control module 50 includes a remote controller 51, which has several control buttons 511 for controlling the operation of the transfer device. The remote controller 51 can be electrically connected to any one or more of the electric drive components, such as the electric push rod, the hub motor 1211, and the lifting mechanism 13, via wired or wireless connection. During use, the operator can control the tilting of the fork mechanism 20, the movement of the hydraulic pallet truck 10, and the lifting of the chassis 11 and the fork mechanism 20 via the corresponding control buttons 511 on the remote controller 51.

[0067] For the manual hydraulic pallet truck 10, the hydraulic system 132 of its lifting mechanism 13 is a manual hydraulic system, and the lifting of the chassis 11 is manually controlled by the control lever 131. Therefore, its lifting mechanism 13 is not subject to the control module 50. For the electric hydraulic pallet truck 10, the hydraulic system 132 of its lifting mechanism 13 is an electric hydraulic system, which can be controlled by the control module 50. Compared with the manual hydraulic pallet truck 10, the hydraulic pallet truck 10 using the electric hydraulic system can realize the electric lifting control of the chassis 11 through the remote control 51, further improving the operational convenience of transporting electrical instrument cabinets.

[0068] Please see Figure 1 and Figure 4 In some embodiments, the transfer device further includes an angle sensor 60, which is disposed between the hydraulic pallet truck 10 and the fork mechanism 20 and is electrically connected to the control module 50. The angle sensor 60 is configured to detect the tilt angle of the mast 21 relative to the chassis 11 and send an angle detection signal to the control module 50. When the control module 50 determines, based on the angle detection signal, that the tilt angle of the mast 21 has reached a preset maximum or minimum tilt angle, it automatically controls the electric cylinder to stop its extension and retraction to prevent the mast 21 from being excessively tilted, thus acting as a limit and preventing the fork arm assembly 22 from hitting the ground and preventing the mast 21 or the loaded electrical control panel from hitting the hydraulic pallet truck 10.

[0069] Angle sensor 60 can be fixed on the first hinge seat 313. The side shaft of angle sensor 60 can be coaxially connected to the first hinge shaft 311. The first hinge shaft 311 is configured to be fixedly connected to the first hinge shaft hole and rotatably connected to the third hinge shaft hole. Thus, when the mast 21 tilts relative to the chassis 11 under the drive of the electric push rod, the first hinge shaft 311 rotates relative to the first hinge seat 313 under the drive of the first support arm 312. In turn, the side shaft of angle sensor 60 is driven to rotate through the first hinge shaft 311, thereby realizing the measurement of the tilt angle of the fork mechanism 20.

[0070] Please see Figures 1 to 2In some embodiments, the second hinge 33 is adjustablely connected to the gantry 21 so that the second hinge 33 can be adjusted to be relatively away from or relatively close to the first hinge 31. Since the second hinge 33 is connected to the gantry 21 via the second arm 332, the mounting position of the second arm 332 on the gantry is adjustable; the first hinge 31 is connected to the gantry 21 via the first arm 312, meaning that the second arm 332 can be adjusted to be relatively away from or relatively close to the first arm 312.

[0071] When the position of the second arm 332 is adjusted to be relatively close to the first arm 312, the push rod of the electric push rod can tilt the mast 21 to the preset tilt angle with a relatively smaller extension length, resulting in higher tilting drive efficiency for the fork mechanism 20. This is suitable for electrical instrument cabinets with relatively small transfer size, relatively light weight, and relatively low center of gravity. When the position of the second arm 332 is adjusted to be relatively far away from the first arm 312, the push rod of the electric push rod can tilt the mast 21 to the preset tilt angle with a relatively larger extension length, resulting in the ability to withstand relatively larger loads. This is suitable for electrical instrument cabinets with relatively higher transfer size, relatively heavier weight, and relatively high center of gravity.

[0072] The adjustable position design of the second hinge 33 in this application enables the tilting mechanism 30 to adapt to the transfer of different types of electrical instrument cabinets, significantly improving the applicability of the transfer device in this application.

[0073] Please see Figure 1 and Figure 2 In some embodiments, the tilting mechanism 30 further includes an adjusting groove 35 and a limiting structure. The number of adjusting grooves 35 matches the number of second support arms 332. In this embodiment, two are used as an example. The two adjusting grooves 35 are respectively provided on the back side of the two columns 211 of the gantry 21. The adjusting grooves 35 extend along a second direction, and the second support arms 332 are slidably connected to the corresponding adjusting grooves 35. The second direction is the height direction of the gantry 21 and is perpendicular to the first direction. When the gantry 21 tilts to an upright state, the second direction is consistent with the Z-axis.

[0074] A limiting structure is provided between the adjustment groove 35 and the second support arm 332 to limit the installation position of the second support arm 332 on the adjustment groove 35.

[0075] In use, the second support arm 332 can be moved to a suitable position along the adjustment groove 35 according to the size and weight of the electrical panel to be transported. Then, the second support arm 332 and the adjustment groove 35 are locked and fixed by the limiting structure to prevent relative movement between them. To ensure that the two second support arms 332 are fixed at the same height position in the adjustment groove 35, a scale or a positioning structure can be set on each adjustment groove 35.

[0076] Please see Figure 2 In some embodiments, the limiting structure includes positioning holes 351, fixing holes (not shown in the figure), and fixing bolts 36. The fixing holes are arranged at equal intervals along the height direction of the gantry 21, i.e., the second direction, on the adjusting groove 35. The positioning holes 351 penetrate radially through both side walls of the adjusting groove 35. The fixing holes are arranged along the X-axis at the bottom of the second support arm 332, which is slidably connected to the adjusting groove 35. The second support arm 332 can move on the adjusting groove 35 until the fixing holes align with any set of positioning holes 351. The fixing bolts 36 lock and fix the second support arm 332 to the adjusting groove 35 through the positioning holes 351 and the fixing holes, thereby realizing the position adjustment of the second support arm 332.

[0077] The fixing bolt 36 can be a quick-release bolt such as a screw bolt, which can be quickly installed and removed to improve the ease of operation for adjusting the position of the second support arm 332.

[0078] Please see Figure 1 and Figure 3 In some embodiments, the transfer device further includes a counterweight assembly 70, which is detachably connected to the chassis 11 and is relatively far away from the fork arm assembly 22. The counterweight assembly 70 can ensure that the hydraulic pallet truck 10 is subjected to balanced force at both ends in the direction of travel, prevent the other end of the hydraulic pallet truck 10 from tilting due to excessive weight of the electrical instrument cabinet, and ensure the stability of the hydraulic pallet truck 10 during the transfer of the electrical instrument cabinet.

[0079] The counterweight assembly 70 includes a first counterweight block 71 and several second counterweight blocks 72. The first counterweight block 71 is detachably connected to the base plate 112 of the chassis 11, and at least one insertion rod 711 is vertically connected to the top surface of the first counterweight block 71. Each second counterweight block 72 is provided with a through-hole (not shown in the figure) that is paired with the insertion rod 711. The second counterweight block 72 is detachably connected to the first counterweight block 71 through the insertion hole and the insertion rod 711.

[0080] The height of the insertion rod 711 must be sufficient to allow multiple second counterweights 72 to be stacked and connected to the first counterweight 71, thus enabling variable adjustment of the overall weight of the counterweight assembly 70. In actual use, the second counterweights 72 can be added or removed according to the weight of the electrical instrument panel being transported, so that the overall weight of the counterweight assembly 70 is adapted to the weight of the electrical instrument panel being transported, avoiding problems such as the hydraulic pallet truck 10 tilting or the counterweight assembly 70 being overloaded due to an unsuitable weight of the counterweight assembly 70.

[0081] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A nuclear power plant electrical instrumentation cabinet transfer device, characterized by, The transfer device includes: A hydraulic pallet truck includes a chassis, a wheel set mounted on the chassis, and a lifting mechanism for controlling the chassis to move up and down relative to the wheel set; The fork mechanism is adjustable in angle to one end of the chassis in the direction of travel via a tilting mechanism; the fork mechanism includes a mast, a fork arm assembly vertically connected to the bottom end of the mast and extending outward, and the electrical panel cabinet is supported by the fork arm assembly and can abut against the mast; The tilting mechanism is configured to drive the fork mechanism to tilt relative to the chassis to a preset tilt angle within an angle range of 0° to 90°; the lifting mechanism is configured to drive the fork mechanism to rise and fall with the chassis.

2. The nuclear power plant electrical instrumentation cabinet transfer device of claim 1, wherein, The tilting mechanism includes: A first hinge is connected between the lower part of the gantry and one end of the chassis in the direction of travel. The first hinge includes a first hinge axis, and the gantry tilts about the first hinge axis. A telescopic drive component, wherein the upper end of the telescopic drive component is hinged to the gantry via a second hinge, and the lower end of the telescopic drive component is movably hinged to the chassis via a third hinge; the second hinge is disposed away from the first hinge and includes a second hinge axis; the third hinge is disposed away from the first hinge and includes a third hinge axis. The first hinge, the second hinge, and the third hinge all extend along a first direction, which is perpendicular to the travel direction of the chassis and parallel to the chassis.

3. The nuclear power plant electrical instrumentation cabinet transfer device of claim 2, wherein, The telescopic drive component includes any one or more of electric cylinders, pneumatic cylinders, and hydraulic cylinders.

4. The nuclear power plant electrical instrumentation cabinet transfer device of claim 3, wherein, The telescopic drive component is an electric cylinder, and the transfer device further includes: The power supply module is detachably connected to the chassis and electrically connected to the electric cylinder for supplying power. The control module is electrically connected to the power supply module and the electric cylinder, and is used to control the operation of the transfer device.

5. The nuclear power plant electrical instrumentation cabinet transfer device of claim 4, wherein, The wheel assembly includes a drive wheel, which is directly driven by a hub motor. The control module and the power supply module are electrically connected to the hub motor.

6. The nuclear power plant electrical instrumentation cabinet transfer device of claim 5, wherein, The control module includes a remote controller, which is electrically connected to the electric cylinder and / or the hub motor and / or the lifting mechanism via a wired or wireless connection. The remote controller is used to control the tilting of the fork mechanism and / or to control the movement of the hydraulic pallet truck and / or to control the lifting of the fork mechanism.

7. The nuclear power plant electrical instrumentation cabinet transfer device of claim 4, wherein, The transfer device further includes: An angle sensor is disposed between the hydraulic pallet truck and the fork mechanism and is electrically connected to the control module; the angle sensor is configured to detect the tilt angle of the mast relative to the chassis and send an angle detection signal to the control module; When the control module determines, based on the angle detection signal, that the tilt angle of the gantry has reached a preset maximum or minimum tilt angle, it automatically controls the electric cylinder to stop its extension and retraction.

8. The nuclear power plant electrical instrumentation cabinet transfer device of claim 2, wherein, The second hinge is adjustablely connected to the gantry so that the second hinge can be adjusted to be relatively far away from or relatively close to the first hinge.

9. The nuclear power plant electrical instrumentation cabinet transfer device of claim 8, wherein, The tilting mechanism also includes: An adjustment groove is provided on the side of the gantry facing away from the fork arm assembly. The adjustment groove extends along a second direction, and the second hinge is slidably connected to the adjustment groove. The second direction is the height direction of the gantry and is perpendicular to the first direction. A limiting structure is disposed between the adjustment groove and the second hinge to limit the installation position of the second hinge on the adjustment groove.

10. The nuclear power plant electrical instrumentation cabinet transfer device of claim 1, wherein, The transfer device also includes a counterweight assembly, which is detachably connected to the chassis and relatively far from the fork arm assembly; The counterweight assembly includes: The first counterweight is detachably connected to the chassis; a rod is vertically connected to the first counterweight. A plurality of second counterweights are provided, each of which has a through-hole for insertion into the insertion rod. The second counterweights are detachably connected to the first counterweights through the through-holes and the insertion rods.

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