Height adjusting device and system of heavy portal crane

Abstract

The utility model discloses a height adjusting device and system of a heavy-duty portal crane, and relates to the technical field of hoisting equipment, the height adjusting device comprises four hydraulic oil cylinders, four height detection assemblies, four control valves and a controller, the four hydraulic oil cylinders are respectively arranged on a movable support of the heavy-duty portal crane; the four height detection assemblies are arranged corresponding to the four hydraulic oil cylinders respectively. The four control valves are correspondingly arranged between the four hydraulic oil cylinders and the hydraulic oil pump respectively; the controller is electrically connected with the four control valves and the four height detection assemblies. The four height detection assemblies are used for detecting the height positions of the four hydraulic oil cylinders in real time, the controller controls the four control valves to act to drive the four hydraulic oil cylinders according to height values fed back by the four height detection assemblies, accurate control over the actions of the four hydraulic oil cylinders is achieved, the heights of the four hydraulic oil cylinders are kept consistent, and the working efficiency is improved. Four-point synchronous lifting is achieved, and the use safety of equipment is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of lifting equipment technology, and in particular to a height adjustment device and system for a heavy-duty gantry crane. Background Technology

[0002] Currently, heavy-duty gantry cranes are specialized lifting equipment used in railway construction projects for assembly or disassembly inside tunnels, or for achieving a larger lifting range within limited space; they are also known as hydraulic jacking gantry cranes. Heavy-duty gantry cranes are equipped with four jacking telescopic outriggers, which are multi-layered sleeve structures connected to the main beam via high-strength bolts to form a gantry structure, ensuring the crane's anti-overturning properties and the stability of the trolley and crane travel directions. The telescopic outriggers are pushed by hydraulic cylinders, with the cylinders and upper and lower joints being hinged.

[0003] In the existing technology, each telescopic outrigger is driven by an independent hydraulic pump station to drive a cylinder. However, each hydraulic system is independent, and the load borne by the telescopic outrigger corresponding to each cylinder may be different, which will lead to uncoordinated cylinder actions. It is difficult to ensure that the height of multiple telescopic outriggers of heavy-duty gantry cranes is consistent, which poses a safety risk. Utility Model Content

[0004] This utility model provides a height adjustment device and system for heavy-duty gantry cranes to solve the technical problem in the related art where each telescopic outrigger of a heavy-duty gantry crane is raised and lowered by a hydraulic cylinder, each hydraulic cylinder is driven by an independent hydraulic system, and the actions of multiple hydraulic cylinders are not coordinated, making it difficult to ensure that the height of multiple telescopic outriggers of the heavy-duty gantry crane is consistent.

[0005] In a first aspect, a height adjustment device for a heavy-duty gantry crane is provided, comprising:

[0006] Four hydraulic cylinders are mounted on the moving support of the heavy-duty gantry crane.

[0007] Four height detection components are respectively set for the four hydraulic cylinders;

[0008] Four control valves are respectively located between the four hydraulic cylinders and the hydraulic pump;

[0009] The controller is electrically connected to the four control valves and the four height detection components.

[0010] In some embodiments, each of the height detection components includes a laser sensor and a laser reflector, the laser sensor and the laser reflector being respectively disposed at the top and bottom of a corresponding hydraulic cylinder.

[0011] In some embodiments, the height adjustment device further includes:

[0012] A weight sensor is mounted on the hook of the heavy-duty gantry crane and is electrically connected to the controller.

[0013] In some embodiments, the height adjustment device further includes:

[0014] An inclination sensor is mounted on the hook of a heavy-duty gantry crane and is electrically connected to the controller.

[0015] In some embodiments, the height adjustment device further includes:

[0016] A horizontal sensor is installed on the main beam of the heavy-duty gantry crane, and the horizontal sensor is electrically connected to the controller.

[0017] In some embodiments, the height adjustment device further includes:

[0018] Four pressure sensors are respectively installed on the four hydraulic cylinders, and the four hydraulic cylinders are electrically connected to the controller.

[0019] In some embodiments, the hydraulic cylinder is a multi-stage hydraulic cylinder.

[0020] In some embodiments, the control valve is a PWM proportional solenoid valve.

[0021] In some embodiments, the controller is a programmable logic controller (PLC).

[0022] Secondly, a height adjustment system for a heavy-duty gantry crane is provided, including the aforementioned height adjustment device for the heavy-duty gantry crane.

[0023] The beneficial effects of the technical solution provided by this utility model include:

[0024] This utility model provides a height adjustment device and system for a heavy-duty gantry crane. The height adjustment device includes four hydraulic cylinders, four height detection components, four control valves, and a controller. The four height detection components detect the height position of the four hydraulic cylinders in real time. The controller then controls the four control valves to drive the four hydraulic cylinders based on the height values ​​fed back by the four height detection components, thereby achieving precise control of the movement of the four hydraulic cylinders and keeping the height of the four hydraulic cylinders consistent. The height difference of the four hydraulic cylinders can be controlled within ±20mm, achieving synchronous lifting at four points and ensuring the safety of equipment use. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 A schematic diagram of a height adjustment device for a heavy-duty gantry crane provided in an embodiment of this utility model;

[0027] Figure 2 Front and rear view schematic diagrams of a height adjustment device for a heavy-duty gantry crane provided for an embodiment of this utility model;

[0028] Figure 3 Side views of the highest and lowest positions of a height adjustment device for a heavy-duty gantry crane provided in an embodiment of this utility model;

[0029] Figure label:

[0030] 100. Heavy-duty gantry crane

[0031] 101. Hydraulic cylinder;

[0032] 102. Height detection component; 1021. Laser sensor; 1022. Laser reflector;

[0033] 103. Control valve;

[0034] 104. Controller;

[0035] 105. Movable support;

[0036] 106. Weight sensor;

[0037] 107. Tilt sensor;

[0038] 108. Horizontal sensor;

[0039] 109. Lifting hook;

[0040] 110. Main beam;

[0041] 111. Pressure sensor;

[0042] 112. Hydraulic oil pump. Detailed Implementation

[0043] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0044] This utility model provides a height adjustment device for a heavy-duty gantry crane, which solves the technical problem that existing heavy-duty gantry cranes use hydraulic cylinders to raise and lower each telescopic outrigger, each cylinder is driven by an independent hydraulic system, and the actions of multiple cylinders are not coordinated, making it difficult to ensure that the height of multiple telescopic outriggers of the heavy-duty gantry crane is consistent.

[0045] See Figure 1 As shown, this utility model embodiment provides a height adjustment device for a heavy-duty gantry crane. The height adjustment device includes: four hydraulic cylinders 101, four height detection components 102, four control valves 103, and a controller 104.

[0046] Four hydraulic cylinders 101 are respectively mounted on the movable support 105 of the heavy-duty gantry crane 100. Four height detection components 102 are respectively provided corresponding to the four hydraulic cylinders 101. Four control valves 103 are respectively provided between the four hydraulic cylinders 101 and the hydraulic pump 112. The controller 104 is electrically connected to the four control valves 103 and the four height detection components 102. The four hydraulic cylinders 101 are respectively the front left outrigger hydraulic cylinder, the front right outrigger hydraulic cylinder, the rear left outrigger hydraulic cylinder, and the rear right outrigger hydraulic cylinder. Each height detection component 102 includes a laser sensor 1021 and a laser reflector 1022. The laser sensor 1021 and the laser reflector 1022 are respectively located at the top and bottom of the corresponding hydraulic cylinder 101. (See [reference]) Figure 2 As shown, the height detection of each of the height detection components 102 can achieve an accuracy of ±5mm.

[0047] Specifically, the controller 104 acquires real-time data detected by the four height detection components 102 and converts it into the actual heights h1, h2, h3, and h4 of the four hydraulic cylinders 101. The height h1 of the front left outrigger hydraulic cylinder can be set as the target value, while the heights h2, h3, and h4 of the front right outrigger, rear left outrigger, and rear right outrigger hydraulic cylinders are feedback values. Taking the adjustment of the height of the front right outrigger hydraulic cylinder as an example: if h2 - h1 = X, and X is not equal to 0, then the height adjustment value of the front right outrigger hydraulic cylinder is X. The controller 104 controls the control valve 103 corresponding to the front right outrigger hydraulic cylinder to actuate, making the height adjustment value X approach zero. Similarly, the controller 104 controls the control valves 103 corresponding to the rear left outrigger and rear right outrigger hydraulic cylinders to actuate, ultimately making h1 = h2 = h3 = h4, achieving uniform height of the four hydraulic cylinders 101. Figure 3 The left and right sides are side views of the heavy-duty gantry crane at its highest and lowest positions, respectively.

[0048] The height adjustment device for the heavy-duty gantry crane in this embodiment of the invention includes four hydraulic cylinders, four height detection components, four control valves, and a controller. The four height detection components detect the height position of the four hydraulic cylinders in real time. The controller then controls the four control valves to drive the four hydraulic cylinders based on the height values ​​fed back by the four height detection components, thereby achieving precise control of the movement of the four hydraulic cylinders, keeping the height of the four hydraulic cylinders consistent, and controlling the height difference of the four hydraulic cylinders within ±20mm. This enables synchronous lifting at four points, ensuring the safety of the equipment.

[0049] As an optional implementation, in one embodiment of the utility model, see [link to utility model description]. Figure 1 and Figure 3 As shown, the height adjustment device further includes a weight sensor 106, which is mounted on the hook 109 of the heavy-duty gantry crane 100 and electrically connected to the controller 104. The weight sensor 106 provides real-time feedback of the load weight on the hook 109 to the controller 104. When the load weight on the hook 109 exceeds a set weight value, the controller 104 can control the four control valves 103 to stop operating, thus preventing uneven loading / overloading.

[0050] As an optional implementation, in one embodiment of the utility model, see [link to utility model description]. Figure 1 and Figure 3As shown, the height adjustment device further includes a tilt sensor 107, which is mounted on the hook 109 of the heavy-duty gantry crane 100 and electrically connected to the controller 104. The tilt sensor 107 provides real-time feedback of the hook 109's deflection angle to the controller 104. When the hook 109's deflection angle exceeds a set angle value (generally ±3 degrees), the controller 104 can control the four control valves 103 to stop operating, thus preventing slippage.

[0051] As an optional implementation, in one embodiment of the utility model, see [link to utility model description]. Figure 1 and Figure 3 As shown, the height adjustment device further includes a level sensor 108, which is installed on the main beam 110 of the heavy-duty gantry crane 100 and electrically connected to the controller 104. The level sensor 108 is used to provide real-time feedback on the longitudinal and lateral levelness of the main beam 110 to the controller 104. When the longitudinal and lateral levelness of the main beam 110 exceeds the set levelness value, the controller 104 can control the four control valves 103 to stop operating, thereby preventing overturning accidents.

[0052] As an optional implementation, in one embodiment of the utility model, see [link to utility model description]. Figure 1 and Figure 3 As shown, the height adjustment device further includes four pressure sensors 111, which are respectively installed on the four hydraulic cylinders 101. The four hydraulic cylinders 101 are electrically connected to the controller 104. The function of the four pressure sensors 111 is to provide real-time feedback on the load (pressure) changes of the corresponding hydraulic cylinders 101. When the load (pressure) change of any hydraulic cylinder 101 exceeds a set value, the controller 104 can control the four control valves 103 to stop operating, thereby preventing uneven loading / overloading.

[0053] As an optional implementation, in one embodiment of the utility model, the hydraulic cylinder 101 is a multi-stage hydraulic cylinder. Multi-stage hydraulic cylinders, through the series connection of multiple pistons, have a compact structure and can achieve a large working stroke within a small space, making them suitable for space-constrained applications. Multi-stage hydraulic cylinders can convert hydraulic pressure over a small area into thrust over a large area, achieving high-pressure and long-stroke output, making them suitable for mechanical equipment requiring long-distance extension and retraction. Multi-stage hydraulic cylinders can reduce heat dissipation and improve energy efficiency by introducing an intermediate cooling medium. Multi-stage hydraulic cylinders can adapt to larger workloads, provide higher output power, and are suitable for various industrial applications.

[0054] As an optional implementation, in one embodiment of the invention, the control valve 103 is a PWM proportional solenoid valve. A PWM proportional solenoid valve can precisely control the opening and closing degree of the valve by changing the duty cycle of the PWM signal, thereby achieving precise control of fluid flow or pressure. The PWM proportional solenoid valve uses a very fast PWM signal cycle, resulting in relatively low energy consumption. It only requires the on / off state of a control coil, making its structure simple and highly reliable. The PWM proportional solenoid valve exhibits excellent dynamic response and is suitable for applications requiring rapid adjustment. Due to its simple and flexible design, the PWM proportional solenoid valve has a long service life.

[0055] As an optional implementation, in one embodiment of the utility model, the controller 104 is a programmable logic controller (PLC). A PLC can be programmed according to actual process requirements to achieve flexible control logic, adapting to different application scenarios and meeting various complex control needs. PLCs typically adopt industrial-grade design and manufacturing standards, possessing high reliability and stability, and can operate for extended periods in harsh industrial environments. PLC systems can be expanded and upgraded as needed, supporting multiple input and output modules, and can be easily connected and integrated with other equipment and systems. PLC systems typically have excellent monitoring and diagnostic functions, allowing operators to monitor and record the system's operating status in real time, promptly identifying and troubleshooting faults. PLCs can implement safety control functions; for example, when equipment malfunctions or becomes abnormal, the PLC can trigger an emergency stop or alarm system to protect the safety of operators and equipment. PLCs typically provide multiple programming interfaces and programming languages, such as ladder diagrams (LD) and function block diagrams (FBD), enabling programmers to program and debug using familiar methods.

[0056] This utility model embodiment provides a height adjustment system for a heavy-duty gantry crane, including the aforementioned height adjustment device for the heavy-duty gantry crane.

[0057] In the description of this utility model, it should be noted that the terms "upper," "lower," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0058] It should be noted that in this invention, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0059] The above description is merely a specific embodiment of the present invention, enabling those skilled in the art to understand or implement the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features of the present invention.

Claims

1. A height adjustment device for a heavy-duty gantry crane, characterized in that, The height adjustment device includes: Four hydraulic cylinders (101) are respectively mounted on the movable support (105) of the heavy-duty gantry crane (100); Four height detection components (102) are respectively provided for the four hydraulic cylinders (101); Four control valves (103) are respectively located between the four hydraulic cylinders (101) and the hydraulic pump (112); The controller (104) is electrically connected to the four control valves (103) and the four height detection components (102).

2. The height adjustment device for a heavy-duty gantry crane according to claim 1, characterized in that: Each of the height detection components (102) includes a laser sensor (1021) and a laser reflector (1022), which are respectively located at the top and bottom of a corresponding hydraulic cylinder (101).

3. The height adjustment device for a heavy-duty gantry crane according to claim 1, characterized in that, The height adjustment device further includes: A weight sensor (106) is mounted on the hook (109) of the heavy-duty gantry crane (100) and is electrically connected to the controller (104).

4. The height adjustment device for a heavy-duty gantry crane according to claim 1, characterized in that, The height adjustment device further includes: An inclination sensor (107) is mounted on the hook (109) of the heavy-duty gantry crane (100) and is electrically connected to the controller (104).

5. The height adjustment device for a heavy-duty gantry crane according to claim 1, characterized in that, The height adjustment device further includes: A horizontal sensor (108) is installed on the main beam (110) of the heavy-duty gantry crane (100), and the horizontal sensor (108) is electrically connected to the controller (104).

6. The height adjustment device for a heavy-duty gantry crane according to claim 1, characterized in that, The height adjustment device further includes: Four pressure sensors (111) are respectively installed on the four hydraulic cylinders (101), and the four hydraulic cylinders (101) are electrically connected to the controller (104).

7. The height adjustment device for a heavy-duty gantry crane according to claim 1, characterized in that: The hydraulic cylinder (101) is a multi-stage hydraulic cylinder.

8. The height adjustment device for a heavy-duty gantry crane according to claim 1, characterized in that: The control valve (103) is a PWM proportional solenoid valve.

9. The height adjustment device for a heavy-duty gantry crane according to claim 1, characterized in that: The controller (104) is a programmable logic controller (PLC).

10. A height adjustment system for a heavy-duty gantry crane, characterized in that: Includes the height adjustment device for the heavy-duty gantry crane as described in any one of claims 1-9.

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