Hydraulic support

Abstract

The utility model discloses a hydraulic support which comprises a top beam, a side protection plate, an electric driving device and a controller, and the side protection plate is rotatably connected with the top beam; the electric driving device comprises an electric cylinder, one end of the electric cylinder is pivotally connected with the top beam, and the other end of the electric cylinder is pivotally connected with the side protecting plate; and the controller is in control connection with the electric driving device and is used for controlling the electric driving device to drive the side protection plate to rotate. According to the utility model, the structure of the whole hydraulic support system is more concise, the complexity and maintenance difficulty of the system are reduced, the trouble of unstable hydraulic liquid supply flow does not exist, stable power support can be provided for the action of the face guard, the smoothness of the movement of the face guard is ensured, the control precision of the whole hydraulic support system is improved, and the service life of the system is prolonged. The movement speed and the working efficiency of the face guard plate are improved, and efficient coal mining can be guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of coal mine equipment technology, specifically to a hydraulic support. Background Technology

[0002] In engineering fields such as coal mining, hydraulic supports are one of the key pieces of equipment in fully mechanized coal mining. As an important component of hydraulic supports, the stable and reliable operation of side plates is crucial for ensuring the safety and efficiency of coal mining. Currently, traditional side plates mostly use hydraulic drive, but the hydraulic pipelines relying on this method have many drawbacks, seriously affecting the performance of the side plates and the entire hydraulic support system.

[0003] First, the hydraulic piping design is complex, with numerous inlet and return lines. In practical applications, due to the complex downhole working environment and the frequent movement of the sidewalls during operation, these complex hydraulic lines can easily be damaged by the sidewalls if the piping design is inadequate. Second, the hydraulic supply system suffers from unstable flow and poor control precision. Furthermore, hydraulic lines are typically thin, and insufficient flow directly slows down the movement of the sidewalls. Utility Model Content

[0004] This utility model aims to at least partially solve one of the technical problems in the related art.

[0005] Therefore, an embodiment of this utility model proposes a hydraulic support.

[0006] The hydraulic support of this utility model embodiment includes a top beam, a side plate, an electric drive device, and a controller. The side plate is rotatably connected to the top beam. The electric drive device includes an electric cylinder, one end of which is pivotally connected to the top beam, and the other end of which is pivotally connected to the side plate. The controller is connected to the electric drive device and is used to control the electric drive device to drive the side plate to rotate.

[0007] In some embodiments, the electric cylinder includes a fixed rod and a telescopic rod, the fixed rod being pivotally connected to the top beam, the telescopic rod being pivotally connected to the side guard plate, and the telescopic rod being extendable and retractable relative to the fixed rod.

[0008] In some embodiments, the fixed rod is provided with an upper limit switch and a lower limit switch to limit the extension and retraction stroke of the electric cylinder.

[0009] In some embodiments, the electric drive unit further includes an overload protection device for cutting off power to protect the equipment when the electric cylinder is overloaded.

[0010] In some embodiments, the electric drive unit further includes an energy storage battery for providing backup power to the electric cylinder.

[0011] In some embodiments, the controller includes a drive control module and a signal acquisition module. The drive control module is used to drive the operation of the electric cylinder, and the signal acquisition module is used to acquire the operating status signal of the electric cylinder.

[0012] In some embodiments, the controller is further connected to a wireless communication module, which is used to interact with external devices.

[0013] In some embodiments, the hydraulic support of this utility model further includes a tilt detection device, which is disposed on the side guard plate and is used to detect the tilt angle of the side guard plate and transmit the detection signal to the controller.

[0014] Compared with related technologies, the hydraulic support of this utility model eliminates the need for hydraulic pipeline design and laying, making the entire hydraulic support system simpler in structure and reducing system complexity and maintenance difficulty. Traditional hydraulic supply systems suffer from unstable flow rates, while the electric drive device (electric cylinder), driven by electricity, eliminates this problem, providing stable power support for the side guard plate's movement and ensuring smooth operation. The electric drive device is easier to control precisely than the hydraulic drive method. The controller can accurately control the extension and retraction of the electric cylinder, thereby precisely controlling the rotation angle and speed of the side guard plate, meeting the precise requirements for the support position and force under different working conditions, and improving the control accuracy of the entire hydraulic support system. Traditional hydraulic pipelines are relatively thin, and insufficient flow can slow down the movement of the side guard plate. The electric drive device is not limited by the hydraulic pipeline flow rate; the electric cylinder can respond quickly to the controller's commands, enabling the side guard plate to move rapidly, improving its movement speed and working efficiency, and helping to ensure efficient coal mining operations. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the hydraulic support according to an embodiment of the present invention.

[0016] Figure 2 This is a structural schematic diagram of the hydraulic support from another perspective of an embodiment of this utility model.

[0017] Figure 3 yes Figure 2 An enlarged schematic diagram of part A in the middle.

[0018] 100. Hydraulic support; 1. Top beam; 2. Side guard plate; 3. Electric drive device; 301. Electric cylinder; 3011. Fixed rod; 3012. Telescopic rod; 302. Upper limit switch; 303. Lower limit switch. Detailed Implementation

[0019] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0020] like Figures 1 to 3 As shown, the hydraulic support 100 of this embodiment includes a top beam 1, a side plate 2, an electric drive device 3, and a controller (not shown). The side plate 2 is rotatably connected to the top beam 1. The electric drive device 3 includes an electric cylinder 301, one end of which is pivotally connected to the top beam 1, and the other end of which is pivotally connected to the side plate 2. The controller is connected to the electric drive device 3 and is used to control the electric drive device 3 to drive the side plate 2 to rotate.

[0021] In this embodiment of the hydraulic support 100, the controller is the core of the entire system. It receives external control commands (such as control signals issued by the operator), processes them internally, and generates corresponding control signals. The electric cylinder 301 in the electric drive unit 3 begins to operate after receiving the control signal from the controller. One end of the electric cylinder 301 is pivotally connected to the top beam 1, and the other end is pivotally connected to the sidewall plate 2. The electric cylinder 301 converts electrical energy into mechanical energy through its extension and retraction motion, pushing or pulling the sidewall plate 2. Since the sidewall plate 2 is rotatably connected to the top beam 1, under the pushing or pulling action of the electric cylinder 301, the sidewall plate 2 rotates around the connection point with the top beam 1, thereby realizing the opening and retraction of the sidewall plate 2 to meet the support requirements of the roadway sidewall during coal mining.

[0022] Compared with related technologies, the hydraulic support 100 of this utility model eliminates the need for hydraulic pipeline design and laying, making the structure of the entire hydraulic support 100 system simpler and reducing system complexity and maintenance difficulty. Traditional hydraulic supply systems suffer from unstable flow rates, while the electric drive device 3 (electric cylinder 301), driven by electricity, eliminates this problem, providing stable power support for the movement of the side guard plate 2 and ensuring smooth movement. Compared to hydraulic drives, the electric drive device 3 allows for more precise control. The controller can precisely control the extension and retraction of the electric cylinder 301, thereby precisely controlling the rotation angle and speed of the side guard plate 2, meeting the precise requirements for the support position and force of the side guard plate 2 under different working conditions, and improving the control accuracy of the entire hydraulic support 100 system. Traditional hydraulic pipelines are relatively thin, and insufficient flow can cause the side guard plate 2 to move slowly. The electric drive unit 3 is not limited by the flow rate of the hydraulic pipeline. The electric cylinder 301 can respond quickly according to the controller's instructions, making the side guard plate 2 move quickly, which improves the movement speed and working efficiency of the side guard plate 2 and helps to ensure the efficient operation of coal mining.

[0023] In some embodiments, the electric cylinder 301 includes a fixed rod 3011 and a telescopic rod 3012. The fixed rod 3011 is pivotally connected to the top beam 1, and the telescopic rod 3012 is pivotally connected to the side guard plate 2. The telescopic rod 3012 is telescopic relative to the fixed rod 3011.

[0024] When the telescopic rod 3012 extends, since the telescopic rod 3012 and the sidewall plate 2 are pivotally connected, the sidewall plate 2 will rotate around the connection point with the top beam 1 towards the sidewall of the roadway under the push of the telescopic rod 3012, thereby unfolding the sidewall plate 2 to support the sidewall of the roadway.

[0025] When the telescopic rod 3012 retracts, it will pull the side guard plate 2 to rotate in the opposite direction, so that the side guard plate 2 can be retracted to adapt to different mining operation needs, such as when the hydraulic support 100 needs to be moved.

[0026] The design of the fixed rod 3011 being pivotally connected to the top beam 1 and the telescopic rod 3012 being pivotally connected to the side guard plate 2 allows the electric cylinder 301 to better adapt to changes in the movement trajectory of the side guard plate 2 during its rotation. When the side guard plate 2 rotates, the two connection points of the electric cylinder 301 can rotate flexibly, reducing the risk of component damage due to motion interference and further improving the reliability and service life of the equipment.

[0027] In some embodiments, the fixed rod 3011 is provided with an upper limit switch 302 and a lower limit switch 303 to limit the extension and retraction stroke of the electric cylinder 301.

[0028] As the telescopic rod 3012 extends, it gradually approaches the upper limit switch 302 as the extension length increases. Once the telescopic rod 3012 triggers the upper limit switch 302, the upper limit switch 302 immediately sends a signal to the controller. Upon receiving this signal, the controller stops sending commands to the electric cylinder 301 to continue extending, thereby stopping the telescopic rod 3012 from extending and limiting the maximum extension stroke of the electric cylinder 301.

[0029] Similarly, when the telescopic rod 3012 retracts, it gradually approaches the lower limit switch 303. When the telescopic rod 3012 triggers the lower limit switch 303, the lower limit switch 303 sends a signal to the controller, and the controller stops sending commands to the electric cylinder 301 to continue retracting, causing the telescopic rod 3012 to stop retracting, thereby limiting the maximum retraction stroke of the electric cylinder 301.

[0030] By setting the upper limit switch 302 and the lower limit switch 303, excessive extension and retraction of the electric cylinder 301 can be avoided. If the electric cylinder 301 extends excessively, the telescopic rod 3012 may collide with other components, causing equipment damage; if it retracts excessively, the internal structure of the electric cylinder 301 may be squeezed or damaged. The limit switches effectively prevent these situations from occurring, ensuring the safe operation of the electric cylinder 301 and the entire hydraulic support 100 system.

[0031] In some embodiments, the electric drive unit 3 further includes an overload protection device for cutting off power to protect the equipment when the electric cylinder 301 is overloaded.

[0032] When the electric cylinder 301 of the electric drive unit 3 is working normally, the controller controls the extension and retraction of the electric cylinder 301 according to the set instructions to drive the side guard plate 2 to rotate. However, during operation, various situations may occur that cause the electric cylinder 301 to overload, such as the side guard plate 2 encountering foreign objects that obstruct its rotation or being subjected to external forces exceeding its design range.

[0033] When the electric cylinder 301 is overloaded, the load on the electric cylinder 301 will suddenly increase, and the motor current will rise sharply accordingly. The overload protection device monitors the operating status of the electric cylinder 301 in real time (usually by monitoring parameters such as motor current). Once it detects that the current exceeds the preset overload threshold, it will react quickly and cut off the power supply to the electric cylinder 301. At this time, the electric cylinder 301 stops working, avoiding further damage to the motor, transmission components, etc. of the electric cylinder 301 caused by overload.

[0034] The key components of the electric cylinder 301, such as the motor, gears, and lead screw, are easily damaged under overload conditions. The overload protection device can cut off the power supply in time to prevent these components from overheating, deforming, or experiencing accelerated wear due to prolonged exposure to excessive loads. This greatly reduces the maintenance cost and replacement frequency of the equipment, ensures the reliability and stability of the electric drive device 3, and extends the overall service life of the equipment.

[0035] In some embodiments, the electric drive unit 3 further includes an energy storage battery for providing backup power to the electric cylinder 301.

[0036] Under normal circumstances, the electric cylinder 301 of the electric drive device 3 obtains power from the conventional power supply system at the coal mine site, and performs extension and retraction movements under the command of the controller, thereby driving the side guard plate 2 to rotate.

[0037] When the conventional power supply system malfunctions, such as a power outage or circuit failure, the energy storage battery comes into play. The energy storage battery pre-stores a certain amount of electrical energy. Upon detecting a main power outage, it automatically connects to the power supply circuit of the electric cylinder 301, providing power support to the electric cylinder 301. This allows the electric cylinder 301 to continue its extension and retraction movements for a certain period, driving the side guard plate 2 to complete necessary operations, such as retracting the side guard plate 2 to a safe position.

[0038] In coal mining operations, sudden power outages or power supply failures are difficult to completely avoid. Without a backup power source, the side guard plate 2 may remain in a dangerous position, unable to be retracted or adjusted in time. This not only affects subsequent mining operations but may also threaten the safety of equipment and personnel. The presence of the energy storage battery ensures that, in the event of a main power failure, the electric cylinder 301 can still drive the side guard plate 2 to perform some necessary actions, guaranteeing the equipment's emergency operation capability in emergency situations.

[0039] Power outages causing equipment shutdowns often disrupt coal mine production, resulting in significant economic losses. The backup power provided by energy storage batteries can keep equipment such as the side support plate operational for short periods, giving workers sufficient time to take countermeasures, such as emergency evacuation and activating backup power generation. This helps reduce production interruption time due to power outages and minimizes production losses.

[0040] In some embodiments, the controller includes a drive control module and a signal acquisition module. The drive control module is used to drive the electric cylinder 301 to work, and the signal acquisition module is used to acquire the working status signal of the electric cylinder 301.

[0041] The signal acquisition module is primarily responsible for collecting the operating status signals of the electric cylinder 301. It acquires relevant information through various sensors, such as: a position sensor: used to detect the position of the telescopic rod 3012 of the electric cylinder 301, thereby determining the extension / retraction state of the electric cylinder 301. When the telescopic rod 3012 extends or retracts, the position sensor converts the specific position information of the telescopic rod 3012 into an electrical signal and transmits it to the signal acquisition module. A pressure sensor: monitors the pressure experienced by the electric cylinder 301 during operation. If the side plate 2 encounters an obstacle or is subjected to a large external force, the pressure inside the electric cylinder 301 will change, and the pressure sensor transmits the pressure change signal to the signal acquisition module. A current sensor: monitors the current of the electric cylinder 301 motor in real time. When the electric cylinder 301 is overloaded, the motor current increases, and the current sensor feeds back the current change signal to the signal acquisition module.

[0042] The signal acquisition module collects, organizes, and performs preliminary processing of signals from different sensors before transmitting them to the drive control module. The drive control module receives the operating status signal of the electric cylinder 301 from the signal acquisition module and analyzes it in conjunction with a preset control strategy. Based on the analysis results, the drive control module generates corresponding control commands to drive the electric cylinder 301 to operate.

[0043] Normal operation control: If the information fed back by the signal acquisition module shows that the electric cylinder 301 is working normally, the drive control module will control the electric cylinder 301 to extend and retract at an appropriate speed and stroke according to the preset program, thereby driving the side guard plate 2 to rotate to the designated position.

[0044] Abnormal Situation Handling: When receiving abnormal signals such as overload or abnormal position of electric cylinder 301, the drive control module will respond immediately. For example, if an overload is detected in electric cylinder 301, the drive control module will stop supplying power to electric cylinder 301 and trigger the overload protection device; if the position of telescopic rod 3012 is detected to be outside the limit range, the drive control module will control electric cylinder 301 to stop extending and retracting, and may issue an alarm signal.

[0045] The signal acquisition module acquires the real-time working status information of the electric cylinder 301, and the drive control module can precisely adjust the operating parameters of the electric cylinder 301, such as extension and retraction speed and stroke, according to the actual situation. This allows for more precise control of the rotation angle and force of the side guard plate 2, meeting the precise requirements for roadway support in different coal mining scenarios and improving the working accuracy of the entire hydraulic support 100 system.

[0046] The signal acquisition module comprehensively monitors the operating status of the electric cylinder 301, enabling timely detection of abnormalities during equipment operation. Based on these abnormal signals, the drive control module quickly takes corresponding protective measures, such as stopping the electric cylinder 301 and triggering overload protection, effectively preventing further damage to the equipment due to malfunctions and ensuring the safety of both the equipment and operators.

[0047] In some embodiments, the controller is also connected to a wireless communication module, which is used to interact with external devices.

[0048] The signal acquisition module collects the operating status signals of the electric cylinder 301, such as the position of the telescopic rod 3012, the pressure of the electric cylinder 301, and the motor current. These signals are first transmitted to the drive control module for processing. The drive control module then sends the processed data to the wireless communication module, which in turn uploads the data to external devices, such as computers in the ground monitoring center or handheld terminals used by staff, via a wireless communication network.

[0049] External devices (such as operators at the ground monitoring center issuing commands via computer, or staff sending commands via handheld terminals) can transmit control commands to the wireless communication module via a wireless communication network. Upon receiving the command, the wireless communication module transmits it to the drive control module, which then adjusts the operation of the electric cylinder 301 accordingly, achieving remote control of the rotation of the side guard plate 2.

[0050] Through data interaction with external devices via the wireless communication module, the ground monitoring center can obtain real-time operating status information of the electric cylinder 301 and the side guard plate 2. Operators can comprehensively monitor the operation of the hydraulic support 100 from the ground monitoring room without going down into the mine. This helps to promptly identify potential equipment failures and take preventative maintenance measures, reducing the impact of equipment malfunctions on coal mine production. Simultaneously, it facilitates centralized management of multiple hydraulic support 100 systems throughout the coal mine operation, improving management efficiency.

[0051] In some embodiments, the hydraulic support 100 of this utility model further includes a tilt detection device, which is disposed on the side guard plate 2 and is used to detect the tilt angle of the side guard plate 2 and transmit the detection signal to the controller.

[0052] Throughout the hydraulic support 100 system, the tilt detection device continuously functions during the normal operation of the sidewall plate 2. When the sidewall plate 2 rotates under the drive of the electric cylinder 301 or tilts due to external factors (such as uneven pressure of the surrounding rock in the roadway, roof subsidence, etc.), the tilt detection device quickly captures this change in tilt angle and converts it into a detection signal in the form of an electrical signal.

[0053] Subsequently, the tilt detection device transmits the detection signal to the controller. The signal acquisition module in the controller receives the signal, and the drive control module analyzes and processes it. If the tilt angle of the sidewall 2 is within the normal operating range, the system continues to operate as is; if the tilt angle exceeds the preset safety threshold, the drive control module will take corresponding measures according to the preset program. For example, it controls the electric cylinder 301 to extend and retract, restoring the sidewall 2 to its normal working angle to ensure effective support for the roadway sidewall.

[0054] The inclination angle of the sidewall support plate 2 directly affects its support effect. If the inclination angle of the sidewall support plate 2 is too large, it may not be able to effectively support the roadway sidewall, leading to roadway sidewall instability and increasing the risk of safety accidents such as roof falls. The inclination detection device can monitor the inclination angle of the sidewall support plate 2 in real time and promptly provide feedback to the controller for adjustment, ensuring that the sidewall support plate 2 is always in the optimal support state, improving the reliability and safety of roadway support, and providing a stable working environment for coal mining operations.

[0055] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", 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 are not intended to 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.

[0056] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0057] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0058] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0059] In this utility model, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0060] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A hydraulic support, characterized in that, include: Top beam (1); Side guard plate (2), which is rotatably connected to the top beam (1); An electric drive device (3) is provided, the electric drive device (3) includes an electric cylinder (301), one end of the electric cylinder (301) is pivotally connected to the top beam (1), and the other end of the electric cylinder (301) is pivotally connected to the side guard plate (2); The controller is connected to the electric drive device (3) and is used to control the electric drive device (3) to drive the side plate (2) to rotate.

2. The hydraulic support according to claim 1, characterized in that, The electric cylinder (301) includes a fixed rod (3011) and a telescopic rod (3012). The fixed rod (3011) is pivotally connected to the top beam (1), and the telescopic rod (3012) is pivotally connected to the side guard plate (2). The telescopic rod (3012) is telescopic relative to the fixed rod (3011).

3. The hydraulic support according to claim 2, characterized in that, The fixed rod (3011) is equipped with an upper limit switch (302) and a lower limit switch (303) to limit the extension and retraction stroke of the electric cylinder (301).

4. The hydraulic support according to claim 1, characterized in that, The electric drive unit (3) also includes an overload protection device, which is used to cut off the power supply to protect the equipment when the electric cylinder (301) is overloaded.

5. The hydraulic support according to claim 1, characterized in that, The electric drive unit (3) also includes an energy storage battery, which is used to provide backup power for the electric cylinder (301).

6. The hydraulic support according to claim 1, characterized in that, The controller includes a drive control module and a signal acquisition module. The drive control module is used to drive the electric cylinder (301) to work, and the signal acquisition module is used to acquire the working status signal of the electric cylinder (301).

7. The hydraulic support according to claim 1, characterized in that, The controller is also connected to a wireless communication module, which is used to interact with external devices.

8. The hydraulic support according to claim 1, characterized in that, It also includes a tilt detection device, which is installed on the side guard plate (2) and is used to detect the tilt angle of the side guard plate (2) and transmit the detection signal to the controller.

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