A tandem connection counterweight structure and a crane

Abstract

The application discloses a series connection counterweight structure and a crane, and belongs to the technical field of engineering mechanical equipment. The series connection counterweight structure comprises a counterweight tray, a truss and a plurality of counterweight blocks. Two sides of the counterweight tray are respectively provided with bearing areas, and the two bearing areas are respectively detachably and fixedly connected with the lower end of one truss. The middle part of the counterweight block is provided with an opening which is adapted to the shape of the truss. The truss penetrates through a plurality of counterweight blocks through the opening, so that the plurality of counterweight blocks are stacked on the bearing areas of the counterweight tray. According to the high mountain harsh construction environment and construction characteristics, the series connection counterweight structure is used, the cumulative assembly gap of the counterweight block is reduced, the structural stability can be improved, and the equipment assembly efficiency is improved.

Description

Technical Field

[0001] This invention relates to a series-connected counterweight structure and a crane, belonging to the field of cranes. Background Technology

[0002] In recent years, a wave of wind turbine construction has swept across China, with the number of wind turbines constantly increasing and wind farms extending from the Central China Plain to the mountainous areas of Northwest China. A wind turbine mainly consists of three parts: the tower, the nacelle, and the blades. These components are characterized by their height, size, and weight. Currently, the assembly of wind turbines is primarily accomplished using large-tonnage crawler cranes.

[0003] With the widespread application of wind turbines, the harsh environment of the high-altitude mountainous regions of Northwest China, characterized by frequent and strong winds, poses a greater challenge to the construction of wind turbines using crawler cranes. Furthermore, construction in the western high-altitude regions presents challenges such as difficulty in obtaining wind information, unpredictable wind speeds, short periods of suitable wind conditions for construction, and the inherent difficulty of construction in high-altitude areas. Therefore, the requirements for crawler crane applications are becoming increasingly stringent, and OEMs are actively developing highly adaptable specialized models.

[0004] The assembly of the nacelle and blades is the main challenge in wind turbine assembly. Tracked cranes are needed to lift the nacelle, weighing hundreds of tons, to a height of hundreds of meters and install it onto the tower. The selected tracked cranes have long booms, and during wind turbine assembly, the operating range is often exceeded by wind forces. Strong winds frequently cause the entire machine to tip over, resulting in significant economic losses. Currently, tracked cranes are generally used during rare, favorable wind conditions such as calm or light breezes. This requires rapid deployment of equipment and personnel for rapid pile installation to improve construction efficiency and project progress, while ensuring construction safety.

[0005] However, crawler cranes face a high failure rate when quickly deployed from prolonged idle periods. This is primarily because, during idle periods, owners often neglect regular maintenance to reduce costs and streamline manpower. Furthermore, harsh environmental conditions such as strong winds and extreme cold can cause problems like difficulty starting the engine, loose control system wiring, battery depletion, and water leakage due to freezing. If these issues or malfunctions are not promptly identified when lifting operations are finally possible, safe operation will be compromised, severely hindering construction efficiency and project progress.

[0006] The hoisting time is fleeting and precious. Some vehicle owners have realized the importance of maintenance when the equipment is idle or not in operation, but they still rely on the old methods of arranging for a specialist to solve the maintenance problem. This is outdated, unsafe, and labor-intensive. Summary of the Invention

[0007] The purpose of this invention is to provide a series-connected counterweight structure and crane. Based on the harsh construction environment and characteristics of high-altitude construction, the series-connected counterweight structure reduces the cumulative assembly gap of the counterweights, improves structural stability, and enhances equipment assembly efficiency.

[0008] To achieve the above objectives, the technical solution adopted by the present invention is as follows.

[0009] On one hand, the present invention provides a series-connected counterweight structure, including a counterweight tray, a truss, and multiple counterweight blocks; The counterweight pallet is provided with load-bearing areas on both sides, and the two load-bearing areas are detachably and fixedly connected to the lower end of the truss. The counterweight has an opening in the middle that is adapted to the shape of the truss; the truss passes through multiple counterweights through the opening, so that multiple counterweights are stacked on the load-bearing area of ​​the counterweight tray.

[0010] The serial connection counterweight structure of the present invention uses an internal rigid structure instead of the flexible chain of the existing counterweight structure, and uses the truss structure as the internal fixed structure to realize the horizontal direction limit of multiple counterweights, reduce the cumulative assembly gap of the counterweights, thereby reducing the sway caused by the rotation of the crawler crane and improving the structural stability; the intermediate truss can provide shear resistance and bending resistance, can meet the load caused by ground tilt, and ensure the lateral load bearing capacity and safety of the counterweights.

[0011] Optionally, the counterweight includes a counterweight body and an anti-detachment counterweight. The counterweight body has a groove on one side that connects to the opening; the anti-detachment counterweight is detachably and fixedly connected to the groove.

[0012] In this implementation, each counterweight can be inserted into the truss from the side, and then restrained in the groove by the anti-detachment counterweight to prevent the counterweight from being dragged out. Since there is no need to place the counterweights from top to bottom, the assembly efficiency can be greatly improved and the assembly difficulty can be reduced.

[0013] Optionally, a first anti-collision block is provided at the corner of the opening of the main body of the counterweight, and a second anti-collision block is provided on the side of the anti-detachment counterweight facing the opening; the first and second anti-collision blocks can protect the counterweight and truss from collision damage during the assembly process.

[0014] Optionally, the first and second anti-collision blocks are made of nylon material, which has a certain buffering and isolation function.

[0015] Optionally, the first anti-collision block is semi-circular, and its arc side is fixed to the main body of the counterweight. The anti-collision block is adapted to the opening edge on the counterweight, which can ensure structural stability while providing protection.

[0016] Optionally, between the stacked adjacent counterweights, one counterweight has a protrusion, and the other counterweight has a recess that corresponds to the protrusion. This sequential interlocking design of the counterweights further optimizes the structural stability of the overall counterweight system under lateral loads.

[0017] Optionally, the truss cross-section is square, or the truss is a section of the crane main boom; that is, the present invention can directly use a truss arm identical to the crane main boom section as an intermediate rigid structure. When the crane is idle and used as a maintenance system base, the truss can be made from local materials, using the crane main boom as the truss, to assemble a tandem counterweight structure.

[0018] Optionally, the load-bearing area of ​​the counterweight pallet is fixed with multiple mounting interfaces, and the lower end of the truss is detachably and fixedly connected to the mounting interfaces via pins; through the fixed connection between the truss and the pallet, the assembled counterweight structure is mainly provided with shear resistance and bending resistance by the truss. When the truss cross-section is large enough, it can meet the load caused by lateral wind force or ground tilt, ensuring the lateral load bearing capacity of the counterweight block and making the structure safer.

[0019] Optionally, a hoisting attachment is provided at the top of the truss. Compared with the traditional hoisting attachment in the middle area between the two load-bearing areas, the present invention sets the hoisting point at the top of the truss, so that the center of gravity of the counterweights on both sides is below the hoisting point, making hoisting more convenient and safer.

[0020] Optionally, the counterweight pallet is provided with mounting and adjustment points on both sides of its edges; and lifting hooks are provided on both sides of the end of each load-bearing area. Multiple installation interfaces are fixedly installed in the area between the load-bearing areas on both sides.

[0021] The installation adjustment points are used for adjusting the counterweight structure when it is installed on the turntable, and the lifting hooks are used to lift the pallet for installation on the turntable. The installation interface in the middle area can also be used to install the main boom section or a suitable truss.

[0022] Optionally, a limiting block is provided between the top counterweight and the truss; the limiting block is detachably connected and fixed to the truss. The setting of the limiting block realizes secondary limiting in the horizontal direction of the series-connected counterweight structure, further improving the overall structural stability.

[0023] In a second aspect, the present invention provides a crane comprising a chassis, a turntable, luffing cables, a mast, an operator's cab, a main boom section, a hook, wire ropes, and the series-connected counterweight structure described in the first aspect; In the lifting operation state, the series-connected counterweight structure is fixedly connected to the turntable through the counterweight tray; When the crane is not in use, the series-connected counterweight structure is placed on the ground.

[0024] Optionally, the crane of the present invention also includes a maintenance system; The maintenance system includes a control device, a wind power generation mechanism, an energy storage unit, an energy management unit, a pipeline heating unit, a moving mechanism lubrication unit, and an engine maintenance unit; In the series-connected counterweight structure, the truss extends through all the counterweights to a set height; the wind power generation mechanism is installed at the top of the truss; the power output end of the wind power generation mechanism is connected to the power storage unit. The control device is installed on the series-connected counterbalance structure, communicates with the crane controller, and is used to control the operation of various components in the maintenance system, including at least: The power management unit detects the power level of the crane battery and controls the power storage unit to charge the crane battery when the power level of the crane battery reaches a set low power range. It can also be used for: The system communicates with the crane controller, sends simulated operation commands, acquires the signal status of the crane system in response to the simulated operation commands, and determines whether there is a signal line fault in the crane system based on the acquired signal status. Control the operation of the pipeline heating module to heat the crane's water pipelines, fuel pipelines, and hydraulic oil pipelines; Control the operation of the motion mechanism lubrication module to lubricate and maintain the motion mechanism of the power system; The engine maintenance module is controlled to perform self-starting checks and lubrication maintenance on the crane's engine.

[0025] The above solutions enable regular or irregular maintenance of cranes when they are idle, ensuring that cranes can be quickly put into construction even after long periods of inactivity. Beneficial effects

[0026] Compared with the prior art, the present invention provides a series-connected counterweight structure and its crane, which innovatively designs a "series" counterweight structure that does not require chain fastening, which can overcome the lateral load caused by the tilt of the ground or the lateral wind force in high mountain areas, and improve the stability and safety of the counterweight structure. The serial connection counterweight structure of the present invention can be connected by a side plug-in method, which is convenient for disassembly and assembly and is not easy to damage the arm section. The counterbalance tray provides three mounting interfaces on the left, center, and right for quick installation of the main boom section; The series-connected counterweight structure can serve as the installation base for the maintenance system, supporting and facilitating the maintenance of the crane in its idle state. The maintenance system integrates power generation and energy storage, addressing energy shortages in high-altitude areas, and resolving issues related to overall system management, maintenance, and upkeep. It improves operational safety and saves manpower and resources. The wind turbine power generation mechanism within the maintenance system can be quickly assembled by freely combining idle boom sections with the counterweight, adjusting the turbine height to achieve maintenance in various scenarios and meet the overall crane's power requirements for maintenance. Attached Figure Description

[0027] Figure 1 The diagram shown is a lateral structural schematic of an embodiment of the serially connected counterweight structure of the present invention. Figure 2 The diagram shown is a schematic of the overall cumulative clearance of a counterweight structure using a traditional chain-fastening method. Figure 3 The diagram shown is a schematic representation of an embodiment of the serial connection counterweight structure of the present invention. Figure 4 As shown Figure 3 Top view; Figure 5 The diagram shows a top view of the counterweight tray structure and a schematic diagram of the counterweight block groove. Figure 6 The diagram shows the front / rear lateral structure of the counterweight pallet. Figure 7 The diagram shows the left / right orientation of the counterweight pallet. Figure 8 The diagram shown is a schematic of a traditional hoisting scheme. Figure 9 The diagram shown is a schematic of the hoisting scheme for the serial connection counterweight structure of the present invention. Figure 10 The diagram shows a schematic of the counterweight body structure that supports lateral insertion. Figure 11 The diagram shown is a lateral insertion diagram of a series-connected counterweight structure. Figure 12 The diagram shows the rapid assembly and disassembly of the counterweight when wind force changes in a low-to-medium altitude environment. Figure 13 The diagram shows the idle maintenance status of a crane based on a series-connected counterbalanced structure. Figure 14 The diagram shows the layout of a low-to-medium altitude wind power generation system. Figure 15 The diagram shown illustrates the adjustable height of the wind turbine tower. Figure 16 The diagram shown illustrates the conversion of a double-row wind turbine tower to a single-row tower. Figure 17 The diagram shows the state of the counterweight structure in flat and sloping scenarios. Figure 18 The diagram shows the maintenance status in a mountainous, high-altitude environment. Figure 19 The diagram shows the maintenance status in a low-to-medium altitude environment halfway up the mountain. Figure 20 The diagram shows the maintenance status at the top of a high mountain in a low-altitude environment. In the diagram: 1. Counterweight; 101. Counterweight body; 102. Anti-detachment counterweight; 103. First anti-collision block; 104. Second anti-collision block; 2. Counterweight pallet; 201. Load-bearing area; 202. Installation and adjustment hook point; 203. Left side installation interface; 204. Middle installation interface; 205. Right side installation interface; 206. Lifting hook; 3. Main boom section; 4. Limit block; 5. Fixing pin; 6. Chassis; 7. Turntable; 8. Luffing cable; 9. Mast; 10. Operator's cab; 11. Hook; 12. Wire rope; 13. Maintenance system; 130. Wind power generation mechanism; 131. Control device; 132. Energy storage unit. Implementation

[0028] Specific embodiments of the present invention are given below with reference to the accompanying drawings. These specific embodiments are only used to further illustrate the present invention in detail and do not limit the scope of protection of the present invention.

[0029] Example 1

[0030] This embodiment describes a series-connected counterweight structure, including a counterweight tray 2, a truss, and multiple counterweight blocks 1; the counterweight tray 2 has load-bearing areas 201 on both sides, and the two load-bearing areas 201 are detachably and fixedly connected to the lower end of the truss; the counterweight blocks 101 have an opening in the middle that conforms to the shape of the truss; the truss passes through the multiple counterweight blocks 1 through the opening, so that the multiple counterweight blocks are stacked on the load-bearing area 201 of the counterweight tray.

[0031] In application, the truss structure serves as an internal fixed structure, replacing the flexible chain of the existing counterweight structure with an internal rigid structure. This reduces the cumulative assembly gap of the counterweight blocks, thereby reducing the sway caused by the rotation of the crawler crane and improving structural stability. The intermediate truss provides shear and bending resistance, which can meet the loads caused by ground inclination, ensuring the lateral load bearing capacity and safety of the counterweight blocks.

[0032] Example 2

[0033] Based on Example 1, Figures 10 to 12 A preferred embodiment of the present invention is shown.

[0034] The figure shows a series-connected counterbalance structure including a counterbalance block 1, a counterbalance tray 2, a main boom section 3, a limiting block 4, and a fixing pin 5. The counterbalance tray 2 is connected to the main boom section 3 by the fixing pin 5. The counterbalance block 1 is connected in series to the main boom section 3. The limiting block 4 is located at the top of the series-connected counterbalance structure. The limiting block 4 is connected in series to the main boom section 3. The fixing pin 5 is located at the top of the limiting block 4. The main boom section 3 has four fixing pin connection points at the top, which can be used for disassembling and relocating the entire counterbalance, and for hoisting from above. Compared with the original chain-fastening counterbalance structure, such as... Figure 11 As shown, the new hoisting scheme of the present invention is as follows: Figure 12 As shown, the center of gravity G is located below the lifting point, making it less likely to tip over and safer. A chain-less counterweight system replaces the flexible chain with an internal rigid structure, truly integrating the counterweight and pallet into a single unit. It utilizes a boom truss structure as the internal fixing structure, with secondary horizontal limiting to reduce cumulative assembly gaps in the counterweights, thereby minimizing sway caused by the crawler crane's rotation and improving stability. The counterweights are strung together in a chain, with the large-section boom section in the middle providing shear and bending resistance. Requiring no fasteners, it can withstand loads caused by ground inclination, ensuring the counterweights' lateral load-bearing capacity and enhancing safety.

[0035] The advantages of the serial connection counterweight structure of this invention are as follows: The use of a truss arm structure as the internal fixing structure, with secondary horizontal restraint, reduces the cumulative assembly clearance of the counterweight blocks. The horizontal movement of the counterweights is primarily achieved using semi-circular grooves and shafts, while the vertical direction is secured with chains. To facilitate assembly and minimize manufacturing errors, a certain assembly clearance L exists between the semi-circular grooves and shafts, typically L = 10-20mm. If 10 counterweights are assembled, the overall range of motion is approximately 200mm, extending forward and backward. With an excessive number of counterweights, the cumulative error increases. A schematic diagram illustrating the overall cumulative clearance using the chain securing method is shown below. Figure 18 As shown, a boom truss structure is used as the internal fixing structure, with secondary horizontal limiting to reduce the cumulative assembly clearance of the counterweights, thereby reducing the sway caused by the rotation of the crawler crane and improving stability. A schematic diagram of the overall cumulative clearance of the series-connected counterweights is shown below. Figure 19 As shown.

[0036] The combination unit uses a counterweight instead of a single piece, features a self-locking mechanism, and is easier to assemble and disassemble. The counterweights are connected in a series. If the counterweights are placed from top to bottom, it is inconvenient to disassemble and assemble and is easy to damage the boom section. The innovative side plug-in method is used to combine the counterweights, which makes the installation quicker and easier and reduces the damage to the boom.

[0037] Balance weight structure: The counterweight 1 includes a counterweight body 101, an anti-detachment counterweight 102, a first anti-collision block 103, and a second anti-collision block 104; The counterweight body 1 has a groove on one side; the second anti-collision block 103 is provided in the groove; the anti-detachment counterweight 102 is assembled in the counterweight body 1; the first anti-collision block 103 is fixed to the inner side of the anti-detachment counterweight 102. like Figure 4 As shown, the anti-detachment counterweight 102 of the serial connection counterweight structure of the present invention is square; the first anti-collision block 103 is made of nylon and is square in shape; the first anti-collision block 103 is fixed to the inner side of the anti-detachment counterweight 102 with bolts; the second anti-collision block 104 is made of nylon and is semi-circular in shape; the counterweight body 1 is fixed to the second anti-collision block 104 with bolts. Using a side-mounted connection method with combined counterweights allows for quicker and easier installation, reducing damage to the boom. Figure 6 As shown.

[0038] Counterbalanced pallet structure: The counterweight pallet 2 includes a welded counterweight pallet structure 201, hanging points 202, mounting interfaces, and lifting hooks 204, such as... Figure 8-10 As shown; The hanging point 202 is located at the middle of the left and right sides of the counterbalance pallet 2; the lifting hook 206 is located at the side edges of the four corners of the counterbalance pallet 2; the installation interface includes a quick installation interface 203 on the left side of the main boom section, a quick installation interface 204 in the middle of the main boom section, and a quick installation interface 205 on the right side of the main boom section; The counterweight pallet 2 serves as a stabilizing weight for the entire machine. The counterweight pallet is connected to the turntable and features mounting hinge points. It provides mounting interfaces for the counterweight block 1 and the main boom section 3. The design includes hinge point mounting interfaces, lifting points, and traction hooks for convenient installation. To simplify manufacturing and reduce costs, all mounting hinge points are on the same plane for easy welding.

[0039] Example 3

[0040] Cranes based on a series-connected counterweight structure: This embodiment provides a preferred structural design scheme for a crane based on a series-connected counterweight structure: The crane based on the series-connected counterweight structure includes a series-connected counterweight structure, a main boom section 3, a chassis 6, a turntable 7, luffing cables 8, a mast 9, an operator's cab 10, a hook 11, a wire rope 12, and an intelligent maintenance system device 13. The turntable 7 is mounted on the chassis 6; the bottom of the mast 9 is fixed to the turntable 7; one upper end of the mast 9 is connected to the turntable 7; the other upper end of the mast 9 is connected to the main boom section 3 via the luffing cable 8; the operator's cab 10 is fixed to the front of the turntable 7; a series counterweight structure is fixed to the rear of the turntable 7; and the wire rope 12 connects the hook 11 to the intelligent maintenance system device 13. The crane with the tandem counterweight structure in this embodiment utilizes locally sourced materials and is designed for harsh mountain construction environments and characteristics. The tandem counterweight structure allows for rapid assembly into a device equipped with an intelligent maintenance system, expanding the equipment's automatic maintenance functions, improving the convenience of equipment management, maintenance, and upkeep, and further enhancing the equipment's environmental adaptability during idle, non-operating periods. This provides a solution for crawler cranes to adapt to the harsh, windy conditions of high-altitude areas, offering greater energy efficiency and cost-effectiveness.

[0041] Wind turbines are installed in harsh mountain environments where wind speeds are unpredictable. Due to these environmental factors, crawler cranes are often idle for extended periods. Furthermore, for safety reasons, crawler cranes are typically installed in a climbing boom configuration. Figure 13 As shown; the crane provided by this invention, by fully utilizing the free combination of idle main boom section 3 and tandem counterweight structure, can be extended to three scenarios for maintenance and upkeep. For example... Figure 20 The diagram shows maintenance functions that can be performed in low-altitude environments at the top of mountains. Figure 19 Maintenance capabilities are available in low-to-medium altitude environments, typically found halfway up mountains. Figure 18 It can perform maintenance in high-altitude mountainous environments.

[0042] The intelligent maintenance system achieves the following: It includes a series counterweight structure, a main boom section 3, a low-to-medium altitude small power generation device 130, a control system 131, and an energy storage device 132. The main boom section 3 is mounted on the top of the series counterweight structure; the main boom section 3 is connected to the low-altitude small power generation device 130 by a pin shaft; the control system 131 and the energy storage device 132 are mounted on the top of the series counterweight structure. The low-altitude small-scale power generation device 130 mainly consists of a small wind power generation device, which assists in converting wind energy into electrical energy; the main boom section 3, as the tower of the low-altitude small-scale wind power device 130, is interchangeable with the main boom section 3 to maximize the value of the main boom section 3 when idle; the control system 131 mainly consists of a controller, which mainly controls the various components of the crane host to achieve intelligent maintenance; the energy storage device 132 mainly consists of a battery, such as... Figure 14 As shown.

[0043] The advantages of low-to-medium altitude small-scale power generation devices are as follows: Maximize the value of equipment when it is not in use by utilizing local resources: By combining the main boom section 3 and the series counterweight structure when idle, a small low-altitude power generation device 130 is formed. Together with the components on the main unit, it forms a maintenance system to realize the maintenance of the whole machine and improve the reliability of the equipment.

[0044] Achieving wind power generation at low altitudes of 1-3 meters: By directly installing a small power generation device on top of the idle counterweight structure, a low-altitude small power generation device can be realized, which can collect wind power at a low altitude of 1 to 3 meters to generate electricity.

[0045] Achieving low-altitude wind power generation at 3-6 meters: The boom sections can be quickly assembled, and the modular design of the components allows for adjustment of the wind turbine height, such as... Figure 15 As shown, with the counterweight structure sufficiently stable, the main boom section 3 is connected by a pin shaft to continue increasing the height, which can collect wind power from low to medium altitudes of 3 to 6 meters for power generation.

[0046] The dual-row to single-row conversion is combined into one, enabling wind power generation at altitudes of over 6 meters. Construction operations in high-altitude environments present diverse challenges. For instance, wind power generation may need to be conducted at the mountaintop, mid-mountain, or foot of the mountain. If operations continue mid-mountain or at the foot of the mountain, low-altitude winds are blocked by the mountain, necessitating an increase in the tower height, the number of main boom sections 3, and the height of the low-to-medium altitude small wind power generation device 130 to exceed the height of the mountain.

[0047] When the power generation unit exceeds the height of the mountain, the wind force increases dramatically. The high tower boom section suffers from insufficient stability, making it prone to bending and damage. By changing the double-row tower to a single-row tower, arranging the counterweights together, increasing the chassis height, and reducing the height of the main boom section 3, stability is improved, meeting the requirements for wind power generation at mid-to-high altitudes above 6 meters. Figure 16 As shown.

[0048] The chassis has strong stability and can operate on certain slopes. The series-connected counterweight structure has internal boom sections, which, compared to traditional chain-connected fastening methods, offer greater stability on certain slopes. It is adaptable to flat ground and can also be used on slopes at a certain angle (α) to suit high-altitude environments. Figure 17 As shown.

[0049] The overall hoisting point relocation is convenient and safe. The serial connection counterweight structure internally includes a main boom section 3, with four pin connection points on top of the boom section. This allows for the disassembly, assembly, and repositioning of the entire counterweight. Compared to the original chain-fastened counterweight solution, this design offers several advantages. Figure 18 As shown, the series-connected counterweight scheme of the present invention is as follows: Figure 19 As shown, the center of gravity G is located below the lifting point, making it less likely to tip over and safer.

[0050] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A series-connected counterweight structure, characterized in that, Includes a counterweight pallet (2), a truss and multiple counterweight blocks (1). The counterweight pallet (2) has load-bearing areas (201) on both sides, and the two load-bearing areas (201) are detachably and fixedly connected to the lower end of the truss. The counterweight (101) has an opening in the middle that is adapted to the shape of the truss; the truss passes through multiple counterweights (1) through the opening, so that multiple counterweights are stacked on the load-bearing area (201) of the counterweight tray. The truss can be a section of the crane's main boom, which extends through all the counterweights to a set height; a wind power generation mechanism is installed at the top of the truss; the power output end of the wind power generation mechanism is connected to an energy storage unit that can charge the crane's battery.

2. The series-connected counterweight structure according to claim 1, characterized in that, The counterweight (1) includes a counterweight body (101) and an anti-shedding counterweight (102). The counterweight body (101) has a groove on one side that connects to the opening; the anti-detachment counterweight (102) is detachably and fixedly connected to the groove.

3. The series-connected counterweight structure according to claim 2, characterized in that, The counterweight body (101) has a first anti-collision block (103) at the corner of the opening, and the anti-detachment counterweight (102) has a second anti-collision block (104) on the side facing the opening. The first anti-collision block (103) and the second anti-collision block (104) are made of nylon material; The first anti-collision block (103) is semi-circular, and the main body of the counterweight block (101) is fixed to one side of its arc.

4. The series-connected counterweight structure according to claim 1, characterized in that, Between the stacked adjacent counterweights, one counterweight has a protrusion (1011) and the other counterweight has a recess (1012) adapted to the protrusion.

5. The series-connected counterweight structure according to claim 1 or 2, characterized in that, The load-bearing area of ​​the counterweight pallet (2) is provided with multiple installation interfaces, and the lower end of the truss is detachably and fixedly connected to the installation interfaces by a pin (5). The top of the truss is equipped with a hoisting bracket.

6. The series-connected counterweight structure according to claim 5, characterized in that, The counterweight pallet (2) is provided with mounting and adjustment points (202) on both sides of its edges; and lifting hooks (206) are provided on both sides of the end of each load-bearing area. Multiple installation interfaces are fixedly installed in the area between the load-bearing areas on both sides.

7. The series-connected counterweight structure according to claim 1, characterized in that, A limiting block (4) is provided between the top counterweight (1) and the truss; the limiting block (4) is detachably connected and fixed to the truss.

8. A crane, characterized in that, Includes a chassis (6), a turntable (7), luffing cables (8), a mast (9), an operator's cab (10), a main boom section (3), a hook (11), a wire rope (12), and a series-connected counterweight structure as described in any one of claims 1-7; In the lifting operation state, the serially connected counterweight structure is fixedly connected to the turntable through the counterweight tray (2); When the crane is not in use, the series-connected counterweight structure is placed on the ground.

9. The crane according to claim 8, characterized in that, It also includes the maintenance system; The maintenance system includes a control device, a wind power generation mechanism, an energy storage unit, an energy management unit, a pipeline heating unit, a moving mechanism lubrication unit, and an engine maintenance unit; The control device is installed on the series-connected counterbalance structure, communicates with the crane controller, and is used to control the operation of various components in the maintenance system, including at least: The power management unit detects the power level of the crane's battery and controls the power storage unit to charge the crane's battery when the power level reaches a set low range.

10. The crane according to claim 8, characterized in that, If the height of the wind power generation mechanism exceeds the height of the mountain in the area where the crane is located, then in the series connection counterweight structure, the trusses of the two load-bearing areas are connected in series from top to bottom, the bottom truss is fixedly installed in the middle area between the two load-bearing areas, and the counterweights on the two load-bearing areas are stacked on the middle area and fitted outside the series trusses.

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