A hydraulic lifting system

Abstract

The utility model discloses a kind of hydraulic lifting systems, the hydraulic lifting system includes lifting execution unit, detection unit and control unit;Lifting execution unit includes multiple lifting execution subunits, multiple lifting execution subunits are used to control the lifting of self-elevating platform;Detection unit is correspondingly set with lifting execution subunit, for detecting the displacement and pressure of multiple lifting execution subunits;Control unit is connected with detection unit for receiving the displacement information and pressure information output by detection unit, and controls the lifting of multiple lifting execution subunits.The technical scheme provided in the utility model embodiment can make the displacement amount of multiple lifting execution subunits and the pressure borne by same be same, ensure the consistency of multiple lifting execution subunits in lifting process, reduce the error between different lifting execution subunits, ensure the balance of self-elevating platform, and improve the safety and anti-interference capability of hydraulic lifting system.

Description

Technical Field

[0001] This utility model relates to the field of marine hydraulic engineering technology, and in particular to a hydraulic lifting system. Background Technology

[0002] Currently, self-elevating platforms for offshore operations are one of the important platforms for marine resource development. Their hydraulic lifting system is a key component of the platform, directly affecting the overall working efficiency and safety of the platform.

[0003] Synchronous control of hydraulic lifting systems must ensure that the displacement, speed, and force output of multiple hydraulic cylinders remain consistent during the lifting process to avoid safety accidents such as platform tilting and structural stress concentration caused by deviations. Existing hydraulic lifting systems are susceptible to the effects of marine environments (such as load fluctuations caused by wind and waves) and sensor failures, which can lead to different pressures received by multiple hydraulic cylinders in the system. This results in significant displacement errors in the hydraulic cylinders, and consequently, insufficient safety of self-elevating platforms operating at sea. Utility Model Content

[0004] This invention provides a hydraulic lifting system to solve the problems of large errors and low safety in existing hydraulic lifting systems.

[0005] According to one aspect of the present invention, a hydraulic lifting system is provided for use on a self-elevating platform, the hydraulic lifting system comprising a lifting execution unit, a detection unit, and a control unit;

[0006] The lifting execution unit includes multiple lifting execution sub-units, which are used to control the lifting of the self-elevating platform;

[0007] The detection unit is configured correspondingly to the lifting actuation subunit and is used to detect the displacement and pressure of multiple lifting actuation subunits;

[0008] The control unit is connected to the detection unit and is used to receive displacement and pressure information output by the detection unit, and to control the lifting and lowering of multiple lifting execution subunits.

[0009] Optionally, the lifting execution unit further includes pile legs, and the lifting execution subunit includes an upper ring beam, an upper lifting hydraulic cylinder, a lower ring beam, and a lower lifting hydraulic cylinder;

[0010] The upper ring beam and the lower ring beam are fitted onto the pile leg, and the upper ring beam and the lower ring beam can move along the length direction of the pile leg;

[0011] The upper end of the upper lifting hydraulic cylinder is connected to the upper ring beam, and the lower end of the upper lifting hydraulic cylinder is connected to the lower ring beam.

[0012] The upper end of the lower lifting hydraulic cylinder is connected to the lower ring beam, and the lower end of the lower lifting hydraulic cylinder is connected to the pile leg; the upper lifting hydraulic cylinder and the lower lifting hydraulic cylinder are used to drive the upper ring beam and the lower ring beam to move along the length direction of the pile leg, respectively.

[0013] Optionally, the lifting execution unit includes three lifting execution sub-units, which are evenly arranged around the pile leg.

[0014] Optionally, the detection unit includes multiple displacement sensors and multiple pressure sensors;

[0015] Multiple displacement sensors are respectively disposed at the bottom of the upper lifting hydraulic cylinder and the lower lifting hydraulic cylinder; the displacement sensors are used to detect the displacement of the upper lifting hydraulic cylinder and the lower lifting hydraulic cylinder;

[0016] Multiple pressure sensors are respectively installed at the oil outlets of the upper and lower lifting hydraulic cylinders; the pressure sensors are used to detect the pressure of the upper and lower lifting hydraulic cylinders.

[0017] Optionally, the number of displacement sensors at the bottom of the upper lifting hydraulic cylinder is two; the number of displacement sensors at the bottom of the lower lifting hydraulic cylinder is two.

[0018] Optionally, the lifting actuator may further include hydraulic oil lines, a hydraulic oil tank, and a hydraulic oil regulating unit;

[0019] The first end of the hydraulic oil pipeline is connected to the hydraulic oil tank, and the second end of the hydraulic oil pipeline is connected to the upper lifting hydraulic cylinder and the lower lifting hydraulic cylinder respectively.

[0020] The hydraulic oil regulating unit is located on the hydraulic oil pipeline and is used to regulate the flow rate of hydraulic oil entering and exiting the upper lifting hydraulic cylinder and the lower lifting hydraulic cylinder.

[0021] Optionally, the hydraulic oil regulating unit includes multiple electro-hydraulic proportional flow valves and multiple flow sensors;

[0022] Multiple electro-hydraulic proportional flow valves are installed on the hydraulic oil pipeline and are correspondingly installed with the upper lifting hydraulic cylinder and the lower lifting hydraulic cylinder to regulate the flow rate of the hydraulic oil entering and exiting the upper lifting hydraulic cylinder and the lower lifting hydraulic cylinder;

[0023] Multiple flow sensors are respectively installed at the outlet of the electro-hydraulic proportional flow valve to detect the flow rate of the hydraulic oil entering and exiting the upper lifting hydraulic cylinder and the lower lifting hydraulic cylinder.

[0024] Optionally, the detection unit further includes a temperature sensor;

[0025] The temperature sensor is installed at the outlet of the hydraulic oil tank and / or on the hydraulic oil pipeline to detect the temperature of the hydraulic oil.

[0026] Optionally, the lifting actuator further includes a hydraulic pump, the input end of which is connected to the hydraulic oil tank via the hydraulic oil pipeline, and the output end of which is connected to the hydraulic oil regulating unit via the hydraulic oil pipeline;

[0027] The hydraulic lifting system also includes a filtration unit, which includes a first filter and a second filter.

[0028] The first filter is disposed between the hydraulic oil tank and the input end of the hydraulic pump for primary filtration of the hydraulic oil;

[0029] The second filter is disposed between the output end of the hydraulic pump and the hydraulic oil regulating unit for secondary filtration of the hydraulic oil.

[0030] Optionally, the hydraulic lifting system further includes a cooling unit; the cooling unit is used to regulate the temperature of the hydraulic oil.

[0031] The technical solution provided by this utility model embodiment sets up multiple detection units corresponding to the lifting execution sub-units. These detection units can detect the displacement and pressure information of the corresponding lifting execution sub-units and synchronize this information to the control module. The control module then controls the lifting action of the lifting execution sub-units based on the received displacement and pressure information, ensuring that the lifting displacement and pressure of the multiple lifting execution sub-units are the same. Setting up multiple detection units to detect the displacement and pressure of the corresponding lifting execution sub-units ensures that the displacement and pressure of the multiple lifting execution sub-units are identical, reducing errors between different lifting execution sub-units and ensuring consistency during the lifting process. This, in turn, guarantees the balance of the self-elevating platform, preventing tilting that could affect the work efficiency and safety of construction personnel, and improving the safety and anti-interference capability of the hydraulic lifting system.

[0032] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of this utility model, nor is it intended to limit the scope of this utility model. Other features of this utility model will become readily apparent from the following description. Attached Figure Description

[0033] 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.

[0034] Figure 1 A schematic diagram of a hydraulic lifting system provided for an embodiment of this utility model;

[0035] Figure 2 A schematic diagram of another hydraulic lifting system provided in this embodiment of the present utility model;

[0036] Figure 3 A schematic diagram of another hydraulic lifting system provided in this embodiment of the present utility model;

[0037] Figure 4 A schematic diagram of another hydraulic lifting system provided in this embodiment of the present utility model;

[0038] Figure 5 This is a schematic diagram of another hydraulic lifting system provided in an embodiment of the present utility model. Detailed Implementation

[0039] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0040] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the utility model described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0041] Figure 1This is a schematic diagram of a hydraulic lifting system provided for an embodiment of the present invention. See also... Figure 1 The hydraulic lifting system 100 is applied to a self-elevating platform. The hydraulic lifting system 100 includes a lifting execution unit 10, a detection unit 20, and a control unit 30. The lifting execution unit 10 includes multiple lifting execution sub-units 11, which are used to control the lifting of the self-elevating platform. The detection unit 20 is correspondingly set with the lifting execution sub-units 11 and is used to detect the displacement and pressure of the multiple lifting execution sub-units 11. The control unit 30 is connected to the detection unit 20 and is used to receive the displacement and pressure information output by the detection unit 20 and control the lifting of the multiple lifting execution sub-units 11.

[0042] Specifically, the lifting execution unit 10 in the hydraulic lifting system 100 may include multiple lifting execution sub-units 11, each of which can control the lifting of the self-elevating platform. During the lifting process of the lifting execution sub-unit 11, the displacement and pressure of the lifting execution sub-unit 11 can be detected by the detection unit 20. The hydraulic lifting system 100 includes multiple detection units 20, which are correspondingly arranged with the lifting execution sub-units 11, and the number of detection units 20 is the same as the number of lifting execution sub-units 11. The detection units 20 are mainly used to detect the displacement of the corresponding lifting execution sub-unit 11 and the pressure it experiences during the lifting process. The control unit 30 is electrically connected to the detection unit 20 and can receive displacement and pressure information output by the detection unit 20. Based on the pressure and displacement information from the corresponding detection unit 20, it controls the lifting action of the corresponding lifting execution sub-unit 11, ensuring that the lifting displacement and pressure of all lifting execution sub-units 11 are the same. This guarantees the balance of the self-elevating platform and prevents tilting caused by asynchronous lifting displacement of the lifting execution sub-units 11, which could pose a danger to construction personnel. The detection unit 20, corresponding to each lifting execution sub-unit 11, acquires the displacement and pressure information of the lifting execution sub-unit 11 and synchronizes this information to the control module 30. The control module 30 can control the lifting actions of multiple lifting execution sub-units 11 based on multiple displacement and pressure information, ensuring that the lifting displacement and pressure of each lifting execution sub-unit 11 are the same.

[0043] The technical solution provided by this utility model embodiment sets up multiple detection units corresponding to the lifting execution sub-units. These detection units can detect the displacement and pressure information of the corresponding lifting execution sub-units and synchronize this information to the control module. The control module then controls the lifting action of the lifting execution sub-units based on the received displacement and pressure information, ensuring that the lifting displacement and pressure of the multiple lifting execution sub-units are the same. Setting up multiple detection units to detect the displacement and pressure of the corresponding lifting execution sub-units ensures that the displacement and pressure of the multiple lifting execution sub-units are identical, reducing errors between different lifting execution sub-units and ensuring consistency during the lifting process. This, in turn, guarantees the balance of the self-elevating platform, preventing tilting that could affect the work efficiency and safety of construction personnel, and improving the safety and anti-interference capability of the hydraulic lifting system.

[0044] Optional, Figure 2 This is a schematic diagram of another hydraulic lifting system provided as an embodiment of the present utility model. Based on the above embodiments, see... Figure 1 and Figure 2 The lifting execution unit 10 also includes a pile leg 12, and the lifting execution subunit 11 includes an upper ring beam 111, an upper lifting hydraulic cylinder 113, a lower ring beam 112, and a lower lifting hydraulic cylinder 114. The upper ring beam 111 and the lower ring beam 112 are fitted onto the pile leg 12, and the upper ring beam 111 and the lower ring beam 113 can move along the length direction of the pile leg 12. The upper end of the upper lifting hydraulic cylinder 113 is connected to the upper ring beam 111, and the lower end of the upper lifting hydraulic cylinder 113 is connected to the lower ring beam 112. The upper end of the lower lifting hydraulic cylinder 114 is connected to the lower ring beam 112, and the lower end of the lower lifting hydraulic cylinder 114 is connected to the pile leg 12. The upper lifting hydraulic cylinder 113 and the lower lifting hydraulic cylinder 114 are used to drive the upper ring beam 111 and the lower ring beam 112 to move along the length direction of the pile leg 12, respectively.

[0045] Specifically, the lifting execution subunit 11 is mainly used to drive the lifting of the self-elevating platform through its own lifting mechanism. The lifting execution subunit 11 may include an upper ring beam 111, an upper lifting hydraulic cylinder 113, a lower ring beam 112, and a lower lifting hydraulic cylinder 114. This lifting execution subunit 11 can be composed of double ring beams and double hydraulic cylinders. The pile leg 12 is provided with multiple pin holes. The upper ring beam 111 and lower ring beam 112 are movably fitted onto the pile leg 12, and the upper ring beam 111 and lower ring beam 112 are provided with pins and pin cylinders that cooperate with the pin holes. The upper end of the upper lifting hydraulic cylinder 113 is connected to the upper ring beam 111, and the lower end of the upper lifting hydraulic cylinder 113 is connected to the lower ring beam 112. The upper lifting hydraulic cylinder 113 is used to drive the upper ring beam 111 to move along the length of the pile leg 12. The upper end of the lower lifting hydraulic cylinder 114 is connected to the lower ring beam 112, and the lower end of the lower lifting hydraulic cylinder 114 is connected to the pile leg 12. The lower lifting hydraulic cylinder 114 is used to drive the lower ring beam 112 to move along the length of the pile leg 12. The upper ring beam 111 and the lower ring beam 112 are respectively connected to the self-elevating platform. When the upper lifting hydraulic cylinder 113 drives the upper ring beam 111 to rise and fall, and the lower lifting hydraulic cylinder 114 drives the lower ring beam 112 to rise and fall, the upper ring beam 111 and the lower ring beam 112 can drive the self-elevating platform to rise and fall.

[0046] The lifting execution unit 10 may include three lifting execution sub-units 11, which are evenly distributed on the pile leg 12. The distance between each lifting execution sub-unit 11 is equal, that is, multiple lifting execution sub-units 11 are evenly arranged on the side of the pile leg 12, and each lifting execution sub-unit 11 is parallel to the central axis of the pile leg 12.

[0047] Optional, Figure 3 This is a schematic diagram of another hydraulic lifting system provided as an embodiment of the present utility model. Based on the above embodiments, see... Figures 1-3 The detection unit 20 includes multiple displacement sensors 21 and multiple pressure sensors 22. The multiple displacement sensors 21 are respectively disposed at the bottom of the upper lifting hydraulic cylinder 113 and the lower lifting hydraulic cylinder 114. The displacement sensors 21 are used to detect the displacement of the upper lifting hydraulic cylinder 113 and the lower lifting hydraulic cylinder 114. The multiple pressure sensors 22 are respectively disposed at the oil outlet of the upper lifting hydraulic cylinder 113 and the lower lifting hydraulic cylinder 114. The pressure sensors 22 are used to detect the pressure of the upper lifting hydraulic cylinder 113 and the lower lifting hydraulic cylinder 114.

[0048] Specifically, the detection unit 20 is mainly used to detect the displacement and pressure of the upper lifting hydraulic cylinder 113 and the lower lifting hydraulic cylinder 114. The detection unit 20 may include multiple displacement sensors 21 and multiple pressure sensors 22. The multiple displacement sensors 21 can be located at the bottom of the upper lifting hydraulic cylinder 113 and the lower lifting hydraulic cylinder 114 to detect the displacement of the lifting hydraulic cylinder 114. The multiple pressure sensors 22 can be located at the oil outlet of the upper lifting hydraulic cylinder 113 and the lower lifting hydraulic cylinder 114 to determine the pressure borne by the upper lifting hydraulic cylinder 113 and the lower lifting hydraulic cylinder 114 by detecting the pressure of the hydraulic oil. It is necessary to ensure that each upper lifting hydraulic cylinder 113 and the lower lifting hydraulic cylinder 114 is equipped with both a displacement sensor 21 and a pressure sensor 22.

[0049] The upper lifting hydraulic cylinder 113 and the lower lifting hydraulic cylinder 114 are equipped with two displacement sensors 21. Specifically, two displacement sensors 21 can be installed at the bottom of the upper lifting hydraulic cylinder 113 and two displacement sensors 21 can be installed at the bottom of the lower lifting hydraulic cylinder 114. By using dual displacement sensors 21, one serving as the primary displacement sensor and the other as a backup, the system's fault tolerance is increased, achieving system redundancy. The displacement sensors 21 can be magnetostrictive displacement sensors with a measurement range of 0-3000 mm, a resolution of 0.01 mm, a sampling frequency of 120 Hz, and a linearity error ≤ ±0.02%FS.

[0050] Optional, Figure 4 This is a schematic diagram of another hydraulic lifting system provided as an embodiment of the present utility model. Based on the above embodiments, see... Figure 4 The hydraulic lifting system 100 also includes a hydraulic oil pipeline 13, a hydraulic oil tank 14, and a hydraulic oil regulating unit 15; the first end of the hydraulic oil pipeline 13 is connected to the hydraulic oil tank 14, and the second end of the hydraulic oil pipeline 13 is connected to the upper lifting hydraulic cylinder 113 and the lower lifting hydraulic cylinder 114 respectively; the hydraulic oil regulating unit 15 is located on the hydraulic oil pipeline 13 and is used to regulate the flow rate of hydraulic oil entering and exiting the upper lifting hydraulic cylinder 113 and the lower lifting hydraulic cylinder 114.

[0051] Specifically, the hydraulic lifting system 100 also includes a hydraulic oil regulating unit, hydraulic oil pipelines 13, a hydraulic oil tank 14, and a hydraulic oil regulating unit 15. The hydraulic oil pipelines 13 are respectively connected between the upper lifting hydraulic cylinder 113, the lower lifting hydraulic cylinder 114, and the hydraulic oil tank 14. The hydraulic oil pipelines 13 may include hydraulic oil inlet pipelines and hydraulic oil outlet pipelines. Hydraulic oil can be supplied from the hydraulic oil tank to the upper lifting hydraulic cylinder 113 and the lower lifting hydraulic cylinder 114 through the hydraulic oil inlet pipeline, and the hydraulic oil from the upper lifting hydraulic cylinder 113 and the lower lifting hydraulic cylinder 114 can be output to the hydraulic oil tank 14 through the hydraulic oil outlet pipeline. For example, Figure 4 The hydraulic oil inlet line is shown only as an example. Both the upper lifting hydraulic cylinder 113 and the lower lifting hydraulic cylinder 114 achieve their lifting functions by being pressurized by hydraulic oil. The hydraulic oil regulating unit 15 can be located at the hydraulic oil inlet and outlet of the upper lifting hydraulic cylinder 113 and the lower lifting hydraulic cylinder 114, and can control the flow rate of hydraulic oil entering and leaving the upper lifting hydraulic cylinder 113 and the lower lifting hydraulic cylinder 114, thereby controlling the lifting displacement of the upper lifting hydraulic cylinder 113 and the lower lifting hydraulic cylinder 114.

[0052] Optionally, based on the above embodiments, see also... Figure 4 The hydraulic oil regulating unit 15 includes multiple electro-hydraulic proportional flow valves 151 and multiple flow sensors 152. The multiple electro-hydraulic proportional flow valves 151 are installed on the hydraulic oil pipeline and are correspondingly installed with the upper lifting hydraulic cylinder 113 and the lower lifting hydraulic cylinder 114 to regulate the flow rate of hydraulic oil entering and exiting the upper lifting hydraulic cylinder 113 and the lower lifting hydraulic cylinder 114. The multiple flow sensors 152 are respectively installed at the outlet of the electro-hydraulic proportional flow valves to detect the flow rate of hydraulic oil entering and exiting the lifting hydraulic cylinder 113 and the lower lifting hydraulic cylinder 114.

[0053] Specifically, the hydraulic oil regulating unit 15 may include multiple electro-hydraulic proportional flow valves 151 and multiple flow sensors 152. The multiple electro-hydraulic proportional flow valves 151 can be respectively positioned at the inlet and outlet ports of the upper lifting hydraulic cylinder 113 and the lower lifting hydraulic cylinder 114, controlling the flow rate into and out of the upper lifting hydraulic cylinder 113 and the lower lifting hydraulic cylinder 114 respectively. The multiple flow sensors 152 can be respectively positioned at the outlet of the electro-hydraulic proportional flow valves 151 for detecting the flow rate of the hydraulic oil. The flow sensors 152 may be turbine-type flow sensors, with a measurement range of 0-250 L / min, an accuracy of ±1%FS, and a response time ≤5 ms.

[0054] The detection unit 20 may also include a temperature sensor, which can be installed at the outlet of the hydraulic oil tank 14 and in the hydraulic oil pipeline 13. The temperature sensor is mainly used to detect the temperature of the hydraulic oil. The temperature of the hydraulic oil is inversely proportional to its viscosity; by obtaining the temperature of the hydraulic oil, its viscosity can be determined. After determining the viscosity of the hydraulic oil, the pressure of the upper lifting hydraulic cylinder 113 and the lower lifting hydraulic cylinder 114 can be further precisely controlled based on the viscosity. The temperature sensor can be a PT100 platinum resistance temperature sensor. In addition, multiple valves such as an electromagnetic relief valve, a pressure reducing valve, and a pressure compensation valve can be installed on the hydraulic oil pipeline 13 to further control the flow rate into and out of the upper lifting hydraulic cylinder 113 and the lower lifting hydraulic cylinder 114, and to precisely control the pressure of the upper lifting hydraulic cylinder 113 and the lower lifting hydraulic cylinder 114.

[0055] Optionally, the control module 30 can control the lifting and lowering of multiple lifting actuator sub-units 11 based on the displacement and pressure information of the upper lifting hydraulic cylinder 113 and the lower lifting hydraulic cylinder 114, as well as the temperature and flow information of the hydraulic oil, to achieve precise control of multiple lifting actuator sub-units. The control module 30 can employ a fuzzy PID synchronous controller, with the upper lifting hydraulic cylinder 113 and the lower lifting hydraulic cylinder 114 as the controlled objects. The set of upper lifting hydraulic cylinders 113 and lower lifting hydraulic cylinders 114 with the highest pressure can be designated as the main lifting actuator sub-unit 11. The control module 30 can control the hydraulic oil inflow and outflow of each lifting actuator sub-unit 11 using a PID algorithm based on the displacement deviation between the other lifting actuator sub-units 11 and the main lifting actuator sub-unit 11. Furthermore, the viscosity of the hydraulic oil affects the pressure of the hydraulic cylinders; the control module 30 can also adjust the PID coefficient based on the hydraulic oil temperature information to automatically adjust the hydraulic oil flow rate, achieving precise flow control and thus realizing synchronous movement of each hydraulic cylinder.

[0056] Optional, Figure 5 This is a schematic diagram of another hydraulic lifting system provided as an embodiment of the present utility model. Based on the above embodiments, see... Figure 5 The lifting actuator 11 also includes a hydraulic pump 16. The input end of the hydraulic pump 16 is connected to the hydraulic oil tank 14 via a hydraulic oil pipeline 13, and the output end of the hydraulic pump 16 is connected to the hydraulic regulating unit 15 via the hydraulic oil pipeline 13. The hydraulic lifting system 100 also includes a filter unit 40, which includes a first filter 41 and a second filter 42. The first filter 41 is disposed between the hydraulic oil tank and the input end of the hydraulic pump 16 and is used for primary filtration of the hydraulic oil. The second filter 42 is disposed between the output end of the hydraulic pump 16 and the hydraulic oil regulating unit 15 and is used for secondary filtration of the hydraulic oil.

[0057] Specifically, the hydraulic pump 16 primarily provides power, delivering hydraulic oil to the upper lifting hydraulic cylinder 113 and the lower lifting hydraulic cylinder 114. During operation, to protect the upper lifting hydraulic cylinder 113 and the lower lifting hydraulic cylinder 114, the hydraulic oil needs to be filtered. This hydraulic lifting system also includes a filtering unit 40, which comprises a first filter 41 and a second filter 42. The first filter 41 can be installed between the hydraulic pump 16 and the hydraulic oil tank 14, performing a first-stage filtration of the hydraulic oil entering the hydraulic pump 16, removing large particulate impurities. The second filter 42 can be installed between the outlet of the hydraulic pump 16 and the hydraulic oil regulating unit 15, filtering the hydraulic oil entering the lifting actuator subunit 11, removing fine impurities in the hydraulic oil to prevent impurities from causing component wear. A cooling unit can also be included, used to cool the hydraulic oil when the temperature is too high, maintaining the viscosity of the hydraulic oil. The cooling unit can be a plate cooler. When the temperature sensor detects that the hydraulic oil temperature is too high, the cooling fan is turned on to stabilize the hydraulic oil temperature within a fixed temperature range, maintain the hydraulic oil viscosity, and ensure system performance.

[0058] The hydraulic lifting system provided by this utility model detects the pressure and displacement information of the lifting execution sub-unit, as well as the temperature information of the hydraulic oil, through a detection unit. Then, the control module controls the flow rate of hydraulic oil entering and leaving the lifting execution sub-unit based on the above information, thereby achieving synchronous control of each lifting execution sub-unit, reducing the error between different lifting execution sub-units, ensuring the consistency of the lifting process of the lifting execution sub-units, and thus ensuring the balance of the self-elevating platform and improving the safety and anti-interference capability of the hydraulic lifting system.

[0059] The specific embodiments described above do not constitute a limitation on the scope of protection of this utility model. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A hydraulic lifting system, characterized in that, The hydraulic lifting system, applied to self-elevating platforms, includes a lifting execution unit, a detection unit, and a control unit. The lifting execution unit includes multiple lifting execution sub-units, which are used to control the lifting of the self-elevating platform; The detection unit is configured correspondingly to the lifting actuation subunit and is used to detect the displacement and pressure of multiple lifting actuation subunits; The control unit is connected to the detection unit and is used to receive displacement and pressure information output by the detection unit, and to control the lifting and lowering of multiple lifting execution subunits.

2. The hydraulic lifting system according to claim 1, characterized in that, The lifting execution unit also includes pile legs, and the lifting execution subunit includes an upper ring beam, an upper lifting hydraulic cylinder, a lower ring beam, and a lower lifting hydraulic cylinder; The upper ring beam and the lower ring beam are fitted onto the pile leg, and the upper ring beam and the lower ring beam can move along the length direction of the pile leg; The upper end of the upper lifting hydraulic cylinder is connected to the upper ring beam, and the lower end of the upper lifting hydraulic cylinder is connected to the lower ring beam. The upper end of the lower lifting hydraulic cylinder is connected to the lower ring beam, and the lower end of the lower lifting hydraulic cylinder is connected to the pile leg; the upper lifting hydraulic cylinder and the lower lifting hydraulic cylinder are used to drive the upper ring beam and the lower ring beam to move along the length direction of the pile leg, respectively.

3. The hydraulic lifting system according to claim 2, characterized in that, The lifting execution unit includes three lifting execution sub-units, which are evenly arranged around the pile leg.

4. The hydraulic lifting system according to claim 2, characterized in that, The detection unit includes multiple displacement sensors and multiple pressure sensors; Multiple displacement sensors are respectively disposed at the bottom of the upper lifting hydraulic cylinder and the lower lifting hydraulic cylinder; the displacement sensors are used to detect the displacement of the upper lifting hydraulic cylinder and the lower lifting hydraulic cylinder; Multiple pressure sensors are respectively installed at the oil outlets of the upper and lower lifting hydraulic cylinders; the pressure sensors are used to detect the pressure of the upper and lower lifting hydraulic cylinders.

5. The hydraulic lifting system according to claim 4, characterized in that, The number of displacement sensors at the bottom of the upper lifting hydraulic cylinder is 2; the number of displacement sensors at the bottom of the lower lifting hydraulic cylinder is 2.

6. The hydraulic lifting system according to claim 2, characterized in that, The lifting actuator also includes hydraulic oil lines, a hydraulic oil tank, and a hydraulic oil regulating unit; The first end of the hydraulic oil pipeline is connected to the hydraulic oil tank, and the second end of the hydraulic oil pipeline is connected to the upper lifting hydraulic cylinder and the lower lifting hydraulic cylinder respectively. The hydraulic oil regulating unit is located on the hydraulic oil pipeline and is used to regulate the flow rate of hydraulic oil entering and exiting the upper lifting hydraulic cylinder and the lower lifting hydraulic cylinder.

7. The hydraulic lifting system according to claim 6, characterized in that, The hydraulic oil regulating unit includes multiple electro-hydraulic proportional flow valves and multiple flow sensors; Multiple electro-hydraulic proportional flow valves are installed on the hydraulic oil pipeline and are correspondingly installed with the upper lifting hydraulic cylinder and the lower lifting hydraulic cylinder to regulate the flow rate of the hydraulic oil entering and exiting the upper lifting hydraulic cylinder and the lower lifting hydraulic cylinder; Multiple flow sensors are respectively installed at the outlet of the electro-hydraulic proportional flow valve to detect the flow rate of the hydraulic oil entering and exiting the upper lifting hydraulic cylinder and the lower lifting hydraulic cylinder.

8. The hydraulic lifting system according to claim 7, characterized in that, The detection unit also includes a temperature sensor; The temperature sensor is installed at the outlet of the hydraulic oil tank and / or on the hydraulic oil pipeline to detect the temperature of the hydraulic oil.

9. The hydraulic lifting system according to claim 7, characterized in that, The lifting actuator also includes a hydraulic pump, the input end of which is connected to the hydraulic oil tank through the hydraulic oil pipeline, and the output end of which is connected to the hydraulic oil regulating unit through the hydraulic oil pipeline. The hydraulic lifting system also includes a filtration unit, which includes a first filter and a second filter. The first filter is disposed between the hydraulic oil tank and the input end of the hydraulic pump for primary filtration of the hydraulic oil; The second filter is disposed between the output end of the hydraulic pump and the hydraulic oil regulating unit for secondary filtration of the hydraulic oil.

10. The hydraulic lifting system according to claim 9, characterized in that, The hydraulic lifting system also includes a cooling unit; the cooling unit is used to regulate the temperature of the hydraulic oil.

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