Intelligent control system for automatic bottom extension and adjustment of hydraulic support in coal mining

Abstract

The present application provides an intelligent control system for automatic extension and bottom adjustment of hydraulic supports in coal mining. The control system for automatic extension and bottom adjustment of hydraulic supports includes a host computer, a switch and a hydraulic support, wherein the hydraulic support includes: a controller, a push drive, a bottom adjustment drive, a bottom adjustment solenoid valve, a push solenoid valve, a push oil cylinder and a bottom adjustment oil cylinder. The staff sends an automatic extension and bottom adjustment instruction to the controller through the host computer. The controller is provided with a control logic that matches different automatic extension and bottom adjustment instructions. After receiving the automatic extension and bottom adjustment instruction, the push drive, the bottom adjustment drive, the bottom adjustment solenoid valve, the push solenoid valve, the push oil cylinder and the bottom adjustment oil cylinder are controlled according to the corresponding control logic to realize the automatic extension and bottom adjustment of the hydraulic support. The entire control process is automatically executed by the controller, and the user does not need to realize the automatic extension and bottom adjustment of the hydraulic support by manipulating the controller, thereby improving the safety and the intelligence of coal mining.

Description

Technical Field

[0001] The present application relates to the field of intelligent coal mining technology, and in particular to an automatic bottom extension and adjustment control system for a hydraulic support in intelligent coal mining. Background Art

[0002] Intelligent coal mining is the introduction of artificial intelligence, 5G communication, and big data technologies into coal mining, which basically realizes the operation of the mining face with few people, the operation of key positions in the coal mine with robots, the unmanned and remote control of fixed positions underground, and the intelligent decision-making and automated coordinated operation of various systems. Among them, the hydraulic support is the core equipment of intelligent coal mining, and the automated control of the hydraulic support is the key to realizing intelligent coal mining.

[0003] At present, for the automatic following and moving of hydraulic supports, the status of existing equipment on the working face and the three-dimensional geological distribution can be accurately grasped through the inclination sensor, mining height sensor, stroke sensor installed on the hydraulic support and the high-precision gyroscope installed on the coal cutter, thereby completing the automatic following and moving of the hydraulic support.

[0004] In the process of automatic follow-up machine shifting of the hydraulic support, the automatic shifting of the hydraulic support is realized by the bottom adjustment cylinder. Among them, for the current intelligent coal mining, when the hydraulic support is shifted, since the controller of the hydraulic support is set on the hydraulic support, the user needs to operate the controller on site to realize the automatic control of the bottom adjustment cylinder to shift the hydraulic support with the machine. However, the coal mining site environment is complex, and users have great safety hazards at the coal mining site. Therefore, there is an urgent need for a hydraulic support automatic bottom extension control system to realize the control of the bottom adjustment cylinder. Summary of the invention

[0005] The present application provides an intelligent control system for automatic bottom extension and adjustment of hydraulic supports in coal mining, which is used to solve the problem of low intelligence level and potential safety hazards in the hydraulic support moving stage.

[0006] In a first aspect, the present application provides an intelligent control system for automatic extension and bottom adjustment of hydraulic supports in coal mining, comprising:

[0007] Host computer, switch and first hydraulic support;

[0008] The first hydraulic support comprises: a first controller, a first push driver, a first bottom adjustment driver, a first push solenoid valve, a first push oil cylinder, a first bottom adjustment solenoid valve and a first bottom adjustment oil cylinder;

[0009] The host computer is connected to the switch, the switch is connected to the first controller, the first controller is connected to the first push driver and the first bottom adjustment driver, the first bottom adjustment driver is connected to the first bottom adjustment solenoid valve, the first push driver is connected to the first push solenoid valve, and the first controller is provided with control logic corresponding to different extension and bottom adjustment control instructions;

[0010] The host computer is used to generate a target bottom extension control instruction according to the instruction information input by the user, and send the target bottom extension control instruction to the first controller through the switch, wherein the instruction information is input by the user according to the movement direction of the conveyor;

[0011] The first controller is used to receive the target bottom extension control instruction sent by the switch, obtain instruction information in the bottom extension control instruction, and obtain and execute the control logic corresponding to the target bottom extension control instruction according to the instruction information;

[0012] When the first controller executes the control logic corresponding to the target extension and bottom adjustment control instruction, it is used to control the first push driver to open the first push solenoid valve according to the instruction information; it is also used to control the first bottom adjustment driver to open the first bottom adjustment solenoid valve when the first push time of the first push oil cylinder reaches the first preset time, and the first bottom adjustment oil cylinder starts to extend and bottom adjust; it is also used to control the first bottom adjustment driver to switch the opening direction of the first bottom adjustment solenoid valve when the first push time of the first push oil cylinder reaches the second preset time, so as to retract the first bottom adjustment oil cylinder, and after the first bottom adjustment oil cylinder retracts, control the first bottom adjustment driver to close the first bottom adjustment solenoid valve; wherein, the second preset time is greater than the first preset time;

[0013] The first push driver is used to open and close the first push solenoid valve under the control of the first controller;

[0014] The first bottom adjustment driver is used to open and close the first bottom adjustment solenoid valve under the control of the first controller, and to switch the opening direction of the first bottom adjustment solenoid valve when the first bottom adjustment solenoid valve is opened;

[0015] The first push solenoid valve is used to supply hydraulic pressure to the first push cylinder when it is opened under the control of the first push driver, and to stop supplying hydraulic pressure to the first push cylinder when it is closed under the control of the first push driver;

[0016] The first push cylinder is used to perform a pushing action when the first push solenoid valve is opened;

[0017] The first bottom adjustment solenoid valve is used to provide hydraulic pressure to the first bottom adjustment cylinder when it is opened under the control of the first bottom adjustment driver, so that the first bottom adjustment cylinder is extended for bottom adjustment, and when the first pushing time of the first pushing cylinder reaches a second preset time, switch the opening direction of the first bottom adjustment solenoid valve to retract the first bottom adjustment cylinder, thereby driving the first hydraulic support to move in the direction of the conveyor movement.

[0018] Optionally, the first hydraulic support further includes: a first displacement stroke sensor;

[0019] The first displacement sensor is connected to the first controller;

[0020] The first push stroke sensor is used to obtain the push stroke of the first push cylinder and send the first push stroke to the first controller;

[0021] The first controller is used to receive the first displacement stroke sent by the displacement stroke sensor, and control the first bottom adjustment driver to open the first bottom adjustment solenoid valve when the first displacement stroke reaches a first preset displacement stroke; and is also used to control the first bottom adjustment driver to switch the opening direction of the first bottom adjustment solenoid valve when the first displacement stroke reaches a second preset displacement stroke, so as to retract the first bottom adjustment cylinder; wherein the value of the first preset displacement stroke is greater than the value of the second preset displacement stroke; and / or,

[0022] The controller is used to receive the first pushing stroke sent by the pushing stroke sensor, and when the first pushing stroke reaches the first preset pushing stroke and / or the first pushing duration of the first pushing cylinder reaches the first preset duration, control the first bottom adjustment driver to open the first bottom adjustment solenoid valve, and the first bottom adjustment cylinder starts to extend and adjust the bottom; and is also used to control the first bottom adjustment driver to switch the opening direction of the first bottom adjustment solenoid valve when the first pushing stroke reaches the second preset pushing stroke and / or the first pushing duration of the first pushing cylinder reaches the second preset duration, so as to retract the first bottom adjustment cylinder.

[0023] Optionally, the first hydraulic support further includes: a first column solenoid valve, a first column, a first column oil cylinder, a first column pressure sensor and a first column driver;

[0024] The first column driver is connected to the first controller and the first column solenoid valve, and the first column sensor pressure is connected to the first controller;

[0025] The first controller is used to control the first column driver to open the first column solenoid valve when the first shifting time of the first shifting oil cylinder reaches a first preset time; and is also used to control the first bottom adjustment driver to open the first bottom adjustment solenoid valve to retract the first bottom adjustment oil cylinder when the first shifting time of the first shifting oil cylinder reaches a first preset column pressure; and is also used to control the first bottom adjustment driver to close the first bottom adjustment solenoid valve when the first bottom adjustment oil cylinder is fully retracted;

[0026] The first column solenoid valve is used to supply hydraulic pressure to the first column cylinder when it is opened under the control of the first column driver, and to stop supplying hydraulic pressure to the first column cylinder when it is closed under the control of the first column driver;

[0027] The first column oil cylinder is used to push the first column up when the first column solenoid valve is opened;

[0028] The first column sensor pressure is used to obtain the first column pressure and send the first column pressure to the first controller.

[0029] Optionally, the hydraulic support automatic extension and bottom adjustment control system further includes: a second hydraulic support;

[0030] The first hydraulic support and the second hydraulic support are adjacent to each other;

[0031] The second hydraulic support is used to drive the first hydraulic support to move in the direction of the conveyor when the first bottom adjustment cylinder of the first hydraulic support is extended, and the first bottom adjustment cylinder is supported by the second hydraulic support.

[0032] Optionally, the second hydraulic support and the first hydraulic support are arranged in sequence along the moving direction of the conveyor.

[0033] Optionally, the hydraulic support automatic extension and bottom adjustment control system further includes: a third hydraulic support;

[0034] The first hydraulic support and the third hydraulic support are adjacent to each other;

[0035] The first bottom adjustment solenoid valve is used to provide hydraulic pressure to the first bottom adjustment cylinder when the first bottom adjustment solenoid valve is opened, so that the first bottom adjustment cylinder pushes the third hydraulic support to move in the direction of the conveyor;

[0036] The first controller is also used to control the first bottom adjustment driver to close the first bottom adjustment solenoid valve when the bottom adjustment action of the first bottom adjustment cylinder reaches a preset stop condition, thereby completing the automatic bottom adjustment of the first hydraulic support.

[0037] Optionally, the first hydraulic support and the third hydraulic support are arranged in sequence along the direction of movement of the conveyor.

[0038] Optionally, the host computer is connected to the switch via an optical fiber.

[0039] Optionally, the switch is connected to the first controller via an optical fiber.

[0040] Optionally, the first bottom adjustment solenoid valve, the first push solenoid valve and the first column solenoid valve constitute a solenoid valve group.

[0041] The present application provides an intelligent control system for automatic extension and bottom adjustment of hydraulic supports in coal mining. The control system for automatic extension and bottom adjustment of hydraulic supports includes a host computer, a switch and a hydraulic support, wherein the hydraulic support includes: a controller, a push drive, a bottom adjustment drive, a bottom adjustment solenoid valve, a push solenoid valve, a push oil cylinder and a bottom adjustment oil cylinder. The staff sends an automatic extension and bottom adjustment instruction to the controller through the host computer. The controller is provided with a control logic that matches different automatic extension and bottom adjustment instructions. After receiving the automatic extension and bottom adjustment instruction, the push drive, the bottom adjustment drive, the bottom adjustment solenoid valve, the push solenoid valve, the push oil cylinder and the bottom adjustment oil cylinder are controlled according to the corresponding control logic to realize the automatic extension and bottom adjustment of the hydraulic support. The entire control process is automatically executed by the controller, and the user does not need to realize the automatic extension and bottom adjustment of the hydraulic support by manipulating the controller, thereby improving safety and the intelligent level of coal mining. In addition, the process of automatic frame movement of the hydraulic support is improved, thereby improving the intelligent level of coal mining, thereby improving coal mining efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0043] Figure 1 A schematic diagram of the structure of an intelligent control system for automatic bottom extension and adjustment of a hydraulic support in coal mining provided in one embodiment of the present application;

[0044] Figure 2 A schematic diagram of the structure of the rack shifting, rack extension and bottom adjustment provided in one embodiment of the present application;

[0045] Figure 3 A schematic diagram of the structure of a rack moving rack and an adjacent rack extending and adjusting the bottom provided in an embodiment of the present application;

[0046] Figure 4 A flow chart of a method for controlling automatic bottom extension and adjustment of a hydraulic support in intelligent coal mining provided in one embodiment of the present application. DETAILED DESCRIPTION

[0047] In order to make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application are clearly and completely described below. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work also fall within the scope of protection of the present application.

[0048] First, the terms involved in this application are explained:

[0049] Extension and bottom adjustment mode: including the extension and bottom adjustment mode of the frame moving and the extension and bottom adjustment mode of the frame moving and the adjacent frame. In the extension and bottom adjustment mode of the frame moving and the adjacent frame, the bottom adjustment cylinder of the frame (i.e. the hydraulic support to be moved) is extended to move the frame. The extension and bottom adjustment mode of the frame moving and the adjacent frame is that the frame needs to be moved, and the bottom adjustment cylinder of the adjacent hydraulic support (i.e. the adjacent frame) is extended to move the frame.

[0050] Bottom extension control mode: including time control mode, stroke control mode and mixed control mode.

[0051] Among them, the time control mode is that when the pushing time of the pushing cylinder reaches the second preset time, the bottom adjustment cylinder starts to extend and adjust, and when the pushing time of the pushing cylinder reaches the third preset time, the bottom adjustment cylinder retracts.

[0052] The stroke control mode is that when the pushing stroke of the pushing cylinder reaches the first preset pushing stroke, the bottom adjustment cylinder starts to extend and adjust the bottom, and when the pushing stroke of the pushing cylinder reaches the second preset pushing stroke, the bottom adjustment cylinder retracts.

[0053] The mixed control mode is that when the pushing stroke reaches the first preset pushing stroke and / or the pushing time of the pushing cylinder reaches the second preset time, the bottom adjustment cylinder starts to extend and adjust, and when the pushing stroke reaches the second preset pushing stroke and / or the pushing time of the pushing cylinder reaches the third preset time, the bottom adjustment cylinder retracts.

[0054] Support area selection: Select the area where the hydraulic support that needs to be moved is located.

[0055] In the prior art, when the hydraulic support automatically moves, the automatic moving of the hydraulic support is realized by the bottom adjustment cylinder. For the moving stage of the hydraulic support, although the automatic moving of the hydraulic support is controlled by the controller, inclination sensor, mining height sensor, stroke sensor and high-precision gyroscope installed on the hydraulic support, the user is still required to operate the controller on site to realize the bottom adjustment cylinder to automatically control the spacing of the hydraulic support to ensure the quality of the project. Due to the complex environment of the coal mining site, users have great safety hazards at the coal mining site, and the coal mining process is affected, and the coal mining efficiency is low.

[0056] Therefore, the technical problems existing in the prior art are not solved. The present application provides an intelligent control system for automatic extension and bottom adjustment of hydraulic supports in coal mining, which is provided with a host computer, a switch and a hydraulic support, and the hydraulic support includes: a controller, a push drive, a first bottom adjustment drive, a bottom adjustment solenoid valve and a bottom adjustment oil cylinder, and a target extension and bottom adjustment control instruction is sent to the controller through the host computer, and the controller is provided with control logic corresponding to different extension and bottom adjustment control instructions. After receiving the target extension and bottom adjustment control instruction, the control logic corresponding to the target extension and bottom adjustment control instruction is obtained and executed, and the automatic extension and bottom adjustment of the hydraulic support is realized in the hydraulic support moving stage through the push drive, the first bottom adjustment drive, the push solenoid valve, the push oil cylinder, the push stroke sensor, the bottom adjustment solenoid valve and the bottom adjustment oil cylinder, without the user having to realize the automatic extension and bottom adjustment of the hydraulic support by operating the controller on site, thereby improving safety and the intelligent degree of coal mining. In addition, the automatic extension and bottom adjustment of the hydraulic support is realized through the intelligent control system for automatic extension and bottom adjustment of the hydraulic support in coal mining provided by the present application, and the process of automatic movement of the hydraulic support is improved, thereby improving coal mining efficiency.

[0057] Figure 1 This is a schematic diagram of the structure of an intelligent coal mining hydraulic support automatic bottom extension and adjustment control system provided by an embodiment of the present application. Figure 1 As shown, the hydraulic support automatic extension and bottom adjustment control system includes: a host computer 110, a switch 120 and a hydraulic support 130; wherein the hydraulic support 130 includes: a controller 131, a push drive 132, a bottom adjustment solenoid valve 133, a bottom adjustment cylinder 134, a push solenoid valve 135, a push cylinder 136 and a bottom adjustment drive 137.

[0058] The host computer 110 is connected to the switch 120, the switch 120 is connected to the controller 131, the controller 131 is connected to the push driver 132 and the bottom adjustment driver 137, the bottom adjustment driver 137 is connected to the bottom adjustment solenoid valve 133, the push driver 132 is connected to the push solenoid valve 135, and the controller 131 is provided with control logic corresponding to different extension and bottom adjustment control instructions.

[0059] The host computer 110 is used to generate a target bottom extension control instruction according to the instruction information input by the user, and send the target bottom extension control instruction to the controller 131 through the switch 120. The instruction information is input by the user according to the movement direction of the conveyor 160.

[0060] The controller 131 is used to receive the target bottom-reaching adjustment control instruction sent by the switch 120, obtain instruction information in the bottom-reaching adjustment control instruction, and obtain and execute the control logic corresponding to the target bottom-reaching adjustment control instruction according to the instruction information.

[0061] Among them, when the controller 131 executes the control logic corresponding to the target extension and bottom adjustment control instruction, it is used to control the push driver 132 to open the push solenoid valve 135 according to the instruction information; it is also used to control the bottom adjustment driver 137 to switch the opening direction of the bottom adjustment solenoid valve 133 when the pushing time of the push cylinder 136 reaches a second preset time, so as to retract the bottom adjustment cylinder 134, and after the bottom adjustment cylinder 134 retracts, control the bottom adjustment driver 137 to close the bottom adjustment solenoid valve 133.

[0062] The second preset duration is greater than the first preset duration.

[0063] A push driver 132, used to open and close the push solenoid valve 135 under the control of the controller 131;

[0064] The bottom adjustment driver 137 is used to open and close the bottom adjustment solenoid valve 133 under the control of the controller 131 , and to switch the opening direction of the bottom adjustment solenoid valve 133 when it is opened.

[0065] The push solenoid valve 135 is used to provide hydraulic pressure to the push cylinder 136 when it is opened under the control of the push driver 132 , and to stop providing hydraulic pressure to the push cylinder 136 when it is closed under the control of the push driver 132 .

[0066] The push cylinder 136 is used to perform a pushing action when the push solenoid valve 135 is opened.

[0067] The bottom adjustment solenoid valve 133 is used to provide hydraulic pressure to the bottom adjustment cylinder 134 when it is opened under the control of the bottom adjustment driver 137, so that the bottom adjustment cylinder 134 extends for bottom adjustment, and when the pushing time of the pushing cylinder 136 reaches a second preset time, switch the opening direction of the bottom adjustment solenoid valve 133 to retract the bottom adjustment cylinder 134, thereby driving the hydraulic support 130 to move in the direction of the conveyor 160.

[0068] In this embodiment, a human-computer interaction interface is provided on the host computer 110, and options are provided on the human-computer interaction interface through programming development, for example, a bottom extension adjustment mode option, a bottom extension adjustment control mode option, and an input box for setting various durations and various strokes, for example, an input box for inputting a first preset duration, an input box for inputting a preset shifting stroke range, an input box for inputting a bracket area for the bottom extension adjustment, etc., for user selection and / or input.

[0069] For example, the bottom extension adjustment mode is provided on the human-computer interaction interface. 0 indicates that the current rack moves to the adjacent rack for bottom extension adjustment, and 1 indicates that the current rack moves to the adjacent rack for bottom extension adjustment.

[0070] After selecting the bottom adjustment mode, if you select 0, that is, the bottom adjustment of the current rack and the adjacent rack is performed, the human-computer interaction interface will also display the adjacent rack selection items. Among them, 0 means turning off the bottom adjustment of the current rack and the adjacent rack, 1 means the left adjacent rack, and 2 means the right adjacent rack. Selecting 1 or 2 not only indicates the selected adjacent rack, but also indicates turning on the bottom adjustment of the current rack and the adjacent rack. If you select 1, that is, the bottom adjustment of the current rack and the adjacent rack is performed, the human-computer interaction interface will also display the start option, among which 0 means turning off the bottom adjustment of the current rack and the adjacent rack, and 1 means turning on the bottom adjustment of the current rack and the adjacent rack.

[0071] For the bottom extension control mode option, 0 represents the time control mode, 1 represents the stroke control mode, and 2 represents the mixed control mode.

[0072] The programming is written in advance according to the process requirements and procedures of coal mining, and runs on the host computer 110 .

[0073] The controller 131 is pre-set with a plurality of control logics. After the controller 131 receives a bottom extension control instruction, the automatic bottom extension adjustment of the hydraulic support is controlled according to the control logic matching the bottom extension control instruction.

[0074] During coal mining, the connecting piece on the hydraulic support 130 is connected to the conveyor 160. When the conveyor 160 moves toward the front or rear direction relative to the hydraulic support 130, the connecting piece will move with the conveyor 160. However, the connecting rod on the hydraulic support 130 connected to the connecting piece is fixed on the hydraulic support 130. Therefore, there is an angle α between the connecting piece and the connecting rod on the hydraulic support 130.

[0075] To avoid danger, the angle α needs to be reduced, or the angle α needs to be eliminated, and the hydraulic support 130 will be pulled. Pulling the hydraulic support 130 means that the hydraulic support 130 moves with the machine.

[0076] When the hydraulic support 130 moves with the machine, if the hydraulic support 130 is not provided with a push stroke sensor for obtaining the push stroke of the push cylinder, and / or the push stroke sensor is damaged, and / or there is a time requirement for the duration of the push action of the hydraulic support 130, a feasible implementation of the present application is:

[0077] The user inputs command information through the human-computer interaction interface of the host computer 110 according to the movement, frame type and frame spacing of the conveyor 160 when the working surface is advanced, that is, selects the bottom extension adjustment mode option and the bottom extension adjustment control mode option on the human-computer interaction interface, and sets the duration and / or stroke required for the bottom extension adjustment, the support area of ​​the bottom extension adjustment, etc. through the input box.

[0078] Specifically, the user selects 1 for bottom adjustment of the current rack through the human-computer interaction interface, and selects 1 to start, and then selects 0 for time control mode in the bottom adjustment control mode. Then, the user sets the bracket area to the 60th to 68th racks, the first preset time length to 4s, the second preset time length to 7s and other instruction information through the human-computer interaction interface.

[0079] The host computer 110 backend server obtains the command information input by the user and generates a target bottom extension control command. Therefore, the target bottom extension control command includes a bottom extension mode, a bottom extension control mode, a support area, etc. Then, the target bottom extension control command is sent to the controller 131 set on the hydraulic support 130 through the switch 120.

[0080] Optionally, optical fiber is used for transmission between the host computer 110 and the switch 120 to reduce environmental interference on the transmission signal and reduce signal distortion.

[0081] Optionally, the switch 120 and the controller 131 are transmitted via optical fiber.

[0082] After receiving the target bottom extension control instruction, the controller 131 obtains instruction information, obtains control logic matching the instruction information according to the instruction information, and starts to execute the control logic according to the instruction information.

[0083] The controller 131 controls the push driver 132 according to the instruction information, so that the push driver 132 controls the push solenoid valve 135 to open, and provides hydraulic pressure to the push cylinder 136, and the push cylinder 136 performs a push action under the push of the hydraulic pressure. Among them, the controller 131 is provided with a timer, which can record the push time of the push cylinder 136. Optionally, the push time of the push cylinder 136 can be obtained by recording the time when the controller 131 controls the push driver 132 to open the push solenoid valve 135.

[0084] When the pushing time of the pushing cylinder 136 reaches 4s, the bottom adjustment cylinder 134 can be extended and adjusted. The controller 131 controls the bottom adjustment driver 137 to open the bottom adjustment solenoid valve 133 and provide hydraulic pressure to the bottom adjustment cylinder 134. The bottom adjustment cylinder 134 starts to extend and adjust under the push of the hydraulic pressure, driving the hydraulic support 130 to move in the direction of the conveyor 160.

[0085] When the pushing time of the pushing cylinder 136 reaches 7s, the bottom adjustment cylinder 134 drives the hydraulic support 130 to move in the direction of the conveyor 160, and the bottom adjustment cylinder 134 needs to be retracted. At this time, the controller 131 controls the bottom adjustment driver 137 to switch the opening direction of the bottom adjustment solenoid valve 133, and the hydraulic inlet and return directions are reversed through the bottom adjustment solenoid valve 133. At this time, the action of the bottom adjustment cylinder 134 is retracted.

[0086] When the bottom adjustment cylinder 134 starts to retract until the pushing time of the push cylinder 136 reaches 10 seconds, the push cylinder 136 is still performing the pushing action until the pushing action time of the push cylinder 136 reaches 10 seconds and the push cylinder 136 retracts to the zero position.

[0087] It should be noted that the first preset time length and the second preset time length can also be adjusted according to the time length required for the push cylinder 136 to retract from a full stroke of 960 mm to 0 position. When the time length required for the push cylinder 136 to retract from a full stroke of 960 mm to 0 position is longer, the first preset time length and the second preset time length can be appropriately increased. Conversely, the first preset time length and the second preset time length can be appropriately shortened.

[0088] In this embodiment, the hydraulic support automatic extension and bottom adjustment control system includes a host computer, a switch and a hydraulic support, wherein the hydraulic support includes: a controller, a push drive, a bottom adjustment drive, a bottom adjustment solenoid valve, a push solenoid valve, a push oil cylinder and a bottom adjustment oil cylinder. The staff sends an automatic extension and bottom adjustment instruction to the controller through the host computer. The controller is provided with other control logics that match different automatic extension and bottom adjustment instructions. After receiving the automatic extension and bottom adjustment instruction, the push drive, the bottom adjustment drive, the bottom adjustment solenoid valve, the push solenoid valve, the push oil cylinder and the bottom adjustment oil cylinder are controlled according to the corresponding control logic to realize the automatic extension and bottom adjustment of the hydraulic support. The entire control process is automatically executed by the controller, and the user does not need to realize the automatic extension and bottom adjustment of the hydraulic support by manipulating the controller, thereby improving safety and the intelligent degree of coal mining. In addition, the process of automatic frame movement of the hydraulic support is improved, thereby improving the intelligent degree of coal mining, thereby improving coal mining efficiency.

[0089] Optionally, when the hydraulic support 130 is pulled, when there is a requirement for the pushing stroke of the hydraulic support 130 , it is necessary to obtain the pushing stroke of the pushing cylinder 136 . Therefore, optionally, the hydraulic support 130 further includes: a pushing stroke sensor 138 . The pushing stroke sensor 138 is connected to the controller 131 .

[0090] The push stroke sensor 138 is used to obtain the push stroke of the push cylinder 136 and send the push stroke to the controller 131 .

[0091] The controller 131 is used to receive the pushing stroke sent by the pushing stroke sensor 135, and when the pushing stroke reaches a first preset pushing stroke, control the bottom adjustment driver 137 to open the bottom adjustment solenoid valve 133, so that the bottom adjustment cylinder 134 starts to extend and adjust the bottom; and is also used to control the bottom adjustment driver 137 to switch the opening direction of the bottom adjustment solenoid valve 133 when the pushing stroke reaches a second preset pushing stroke, so as to retract the bottom adjustment cylinder 134; wherein the first preset pushing stroke is greater than the second preset pushing stroke; and / or,

[0092] The controller 131 is used to receive the pushing stroke sent by the pushing stroke sensor 135, and when the pushing stroke reaches a first preset pushing stroke and / or the pushing time of the pushing cylinder 136 reaches a second preset time, control the bottom adjustment driver 137 to open the bottom adjustment solenoid valve 133; it is also used to control the bottom adjustment driver 137 to switch the opening direction of the bottom adjustment solenoid valve 133 when the pushing stroke reaches a second preset pushing stroke and / or the pushing time of the pushing cylinder 136 reaches a third preset time, so as to retract the bottom adjustment cylinder 134.

[0093] In this embodiment, when the bottom extension control mode selected by the user on the human-machine interaction interface of the host computer 110 is the stroke control mode, the first preset push stroke of the push cylinder 136 is set to 600 mm, and the second preset push stroke is set to 300 mm.

[0094] In the stroke control mode, the controller 131 controls the push driver 132 to control the push solenoid valve 135 to open, and provides hydraulic pressure to the push cylinder 136. The push cylinder 136 performs a push action under the push of the hydraulic pressure. During the push of the push cylinder 136, the push stroke sensor 138 obtains the push stroke of the push cylinder 136 in real time, and sends the push stroke of the push cylinder 136 to the controller 131.

[0095] The controller 131 determines whether the pushing stroke of the pushing cylinder 136 reaches 600 mm. When the pushing stroke of the pushing cylinder 136 reaches 600 mm, the controller 131 controls the bottom adjustment driver 137 to open the solenoid valve 133 to provide hydraulic pressure for the bottom adjustment cylinder 134, and the bottom adjustment cylinder 134 extends.

[0096] At this time, the push cylinder 136 continues to push, and the push stroke sensor 138 obtains the push stroke of the push cylinder 136 in real time and sends the push stroke of the push cylinder 136 to the controller 131. The controller 131 determines whether the push stroke of the push cylinder 136 reaches 300 mm. When the push stroke of the push cylinder 136 reaches 300 mm, the bottom adjustment driver 137 is controlled to switch the opening direction of the bottom adjustment solenoid valve 133 to retract the bottom adjustment cylinder 134.

[0097] When the bottom adjustment cylinder 134 starts to retract until the duration of the pushing action of the push cylinder 136 reaches 10 seconds, the push cylinder 136 is still performing the pushing action until the duration of the pushing action of the push cylinder 136 reaches 10 seconds, and the push cylinder 136 retracts to the zero position.

[0098] Optionally, when the hydraulic support 130 is pulling the frame, if there are requirements for the pushing time and the pushing stroke of the pushing cylinder 136, the user can select the mixed control mode of the bottom extension control mode on the human-machine interaction interface of the host computer 110.

[0099] The first preset displacement stroke of the displacement cylinder 136 is set to 600 mm, the second preset displacement stroke is set to 300 mm, the first preset time length is set to 10 s, the second preset time length is set to 4 s, and the third preset time length is set to 7 s.

[0100] The controller 131 controls the push driver 132 according to the instruction information, so that the push driver 132 controls the push solenoid valve 135 to open, and provides hydraulic pressure to the push cylinder 136. The push cylinder 136 performs a push action under the push of the hydraulic pressure. The controller 131 records the push duration of the push action of the push cylinder 136, and obtains the push stroke of the push cylinder 136 in real time.

[0101] The controller 131 determines whether the pushing time reaches 4s and whether the pushing stroke reaches 600mm. When the pushing time reaches 4s and the pushing stroke does not reach 600mm, or the pushing stroke reaches 600mm and the pushing time does not reach 4s, or the pushing time reaches 4s and the pushing stroke reaches 600mm at the same time, the controller 131 controls the bottom adjustment driver 137 to open the bottom adjustment solenoid valve 133, providing hydraulic pressure for the bottom adjustment cylinder 134, and the bottom adjustment cylinder 134 extends.

[0102] At this time, the push cylinder 136 continues to perform the pushing action, and the pushing stroke sensor 138 obtains the pushing stroke of the push cylinder 136 in real time and sends the pushing stroke of the push cylinder 136 to the controller 131. The controller 131 continues to record the pushing duration of the pushing action of the push cylinder 136.

[0103] When the pushing time reaches 7s and the pushing stroke does not reach 300mm, or, when the pushing time reaches 300mm and the pushing stroke does not reach 7s, or, when the pushing time reaches 7s and the pushing stroke reaches 300mm, the bottom adjustment driver 137 is controlled to switch the opening direction of the bottom adjustment solenoid valve 133 to retract the bottom adjustment cylinder 134.

[0104] When the bottom adjustment cylinder 134 starts to retract until the duration of the pushing action of the push cylinder 136 reaches 10 seconds, the push cylinder 136 is still performing the pushing action until the duration of the pushing action of the push cylinder 136 reaches 10 seconds, and the push cylinder 136 retracts to the zero position.

[0105] In this embodiment, a push stroke sensor is provided on the hydraulic support, and the push cylinder is controlled to perform a push action through a push solenoid valve, and the push stroke of the push cylinder is obtained through the push stroke sensor, and when the push stroke reaches a first preset push stroke, the bottom adjustment cylinder is controlled to extend and adjust the bottom, and when the push stroke reaches a second preset push stroke, the bottom adjustment cylinder is controlled to retract. Thus, when the hydraulic support frame has requirements for the push stroke of the push cylinder, or when there are requirements for the push stroke and push duration of the push cylinder, the hydraulic support is automatically extended and adjusted to the bottom, ensuring the safe movement of the hydraulic support, meeting the needs of coal mining, and improving the intelligence of coal mining.

[0106] When the pushing stroke of the push cylinder 136 reaches the 0 position, in order to avoid safety accidents when the hydraulic support 130 is moved, the bottom adjustment cylinder 134 needs to continue to retract. Therefore, optionally, the hydraulic support 130 also includes: a column solenoid valve 151, a column 152, a column cylinder 153, a column sensor pressure 154 and a column driver 155. Among them, the column driver 155 is connected to the controller 131 and the column solenoid valve 151, and the column sensor pressure 154 is connected to the controller 131. It should be noted that on the hydraulic support 130, the bottom adjustment solenoid valve 133, the push solenoid valve 135 and the column solenoid valve 151 constitute a solenoid valve group.

[0107] The controller 131 is used to control the column driver 155 to open the column solenoid valve 151 when the pushing action of the push cylinder reaches a first preset time length; it is also used to control the bottom adjustment driver 137 to open the bottom adjustment solenoid valve 133 to retract the bottom adjustment cylinder 134 when the column pressure reaches a first preset column pressure; it is also used to control the bottom adjustment driver 137 to close the bottom adjustment solenoid valve 133 when the bottom adjustment cylinder 134 is fully retracted.

[0108] The column solenoid valve 151 is used to provide hydraulic pressure to the column cylinder 153 when it is opened under the control of the column driver 155, and to stop providing hydraulic pressure to the column cylinder 153 when it is closed under the control of the column driver 155.

[0109] The column cylinder 153 is used to push the column 152 up when the column solenoid valve 151 is opened.

[0110] The column pressure sensor 154 is used to obtain the column pressure and send the column pressure to the controller 131 .

[0111] In this embodiment, the user sets the preset column pressure of the column 152 to 50 bar on the human-computer interaction interface of the host computer 110. By setting the preset column pressure of the column 152, a trigger point is provided for the bottom adjustment cylinder 134. When the column pressure reaches 50 bar, the bottom adjustment cylinder 134 retracts again.

[0112] When the pushing time of the pushing cylinder 136 reaches 10 seconds and the pushing stroke is at 0 position, the bottom adjustment cylinder 134 has not been completely retracted. At this time, the controller 131 controls the column driver 155 to open the column solenoid valve 151.

[0113] When the column solenoid valve 151 is opened, the column 152 rises under the push of the column oil cylinder 153, and the column sensor pressure 154 obtains the column pressure in real time and transmits the column pressure to the controller 131. Therefore, when the column 152 rises, the column sensor pressure 154 transmits the column pressure to the controller 131. The controller 131 determines whether the column pressure reaches 50 bar. When the column pressure reaches the preset column pressure, the controller 131 controls the bottom adjustment driver 137 to open the bottom adjustment solenoid valve 133, so that the bottom adjustment oil cylinder 134 continues to retract. After the bottom adjustment oil cylinder 134 is fully retracted, the bottom adjustment solenoid valve 133 is closed by controlling the bottom adjustment driver 137.

[0114] In this embodiment, the hydraulic support is provided with a column solenoid valve, a column, a column oil cylinder, and a column sensor pressure, so that when the bottom adjustment oil cylinder is not fully retracted, the column is raised by the column oil cylinder, and the trigger point for the retraction of the bottom adjustment oil cylinder is set to retract it, and the column pressure when the column is raised is obtained through the column sensor pressure, and when the column pressure reaches the preset column pressure, the bottom adjustment solenoid valve is controlled to close, so that the bottom adjustment oil cylinder stops moving, and the retraction of the bottom adjustment oil cylinder is completed. The automatic extension and bottom adjustment of the hydraulic support is realized, the safe movement of the hydraulic support is guaranteed, the coal mining needs are met, and the intelligent degree of coal mining is improved.

[0115] In practice, when the hydraulic support 130 is moved in the direction of the conveyor 160 driven by the bottom adjustment cylinder, the bottom adjustment cylinder needs a fulcrum as a force point to extend so that the bottom adjustment cylinder 134 receives a reaction force, thereby driving the hydraulic support 130 to move in the direction of the conveyor 160.

[0116] Optional, such as Figure 2As shown, the hydraulic support automatic extension and bottom adjustment control system further includes: a second hydraulic support 130 , and the first hydraulic support 130 and the second hydraulic support 130 are adjacent to each other.

[0117] The second hydraulic support 130 is used to drive the first hydraulic support 130 to move in the direction of the conveyor 160 when the bottom adjustment cylinder 134 of the first hydraulic support 130 is extended and the bottom adjustment cylinder 134 is supported by the second hydraulic support 130 .

[0118] It should be noted that the first hydraulic support 130 and the second hydraulic support 130 are used to distinguish between the two hydraulic supports.

[0119] In this embodiment, Figure 2 As shown, when the transporter 160 moves toward the tail, the first hydraulic support 130 needs to move toward the tail of the transporter 160, and the bottom extension adjustment mode needs to select 1 main frame movement and bottom extension adjustment. At this time, the first hydraulic support 130 is the main frame and the second hydraulic support 130 is the adjacent frame.

[0120] When the hydraulic support is extended and bottom adjusted, the bottom adjustment cylinder 134 of the first hydraulic support 130 extends toward the second hydraulic support 130 and contacts the second hydraulic support 130, so that the bottom adjustment cylinder 134 of the first hydraulic support 130 is subjected to the reaction force of the second hydraulic support with the second hydraulic support 130 as the supporting point.

[0121] Among them, the first hydraulic support 130 is moved toward the tail direction of the conveyor 160, and the direction of the reaction force of the second hydraulic support received by the bottom adjustment cylinder 134 of the first hydraulic support 130 should be the tail direction of the conveyor 160. Therefore, from the nose to the tail direction, there are the second hydraulic support 130 and the first hydraulic support 130 in turn.

[0122] In this embodiment, when the conveyor moves toward the tail of the machine, the bottom adjustment mode of the first hydraulic support is used so that the bottom adjustment cylinder of the first hydraulic support uses the second hydraulic support as a support point to obtain a force, thereby driving the first hydraulic support to move toward the tail of the conveyor, thereby realizing precise movement of the hydraulic support, and the first hydraulic support and the conveyor are perpendicular to each other, thereby improving the safety of coal mining.

[0123] Optional, such as Figure 3 As shown, the transporter 160 may also move toward the nose direction. Due to the position of the bottom adjustment cylinder on the hydraulic support 130, the frame moving and bottom adjustment mode cannot be adopted. In order to realize the automatic frame moving of the hydraulic support 130 and the accurate frame moving during the automatic frame moving, the hydraulic support automatic bottom adjustment control system also includes: a third hydraulic support 130, the first hydraulic support 130 and the third hydraulic support 130 are adjacent.

[0124] The bottom adjustment solenoid valve 133 of the first hydraulic support 130 is used to provide hydraulic pressure to the bottom adjustment cylinder 134 of the first hydraulic support 130 when the bottom adjustment solenoid valve 133 of the first hydraulic support 130 is opened, so that the bottom adjustment cylinder 134 of the first hydraulic support 130 pushes the third hydraulic support 130 to move in the direction of the conveyor 160.

[0125] The controller 131 of the first hydraulic support 130 is also used to control the bottom adjustment driver 137 of the first hydraulic support 130 to close the bottom adjustment solenoid valve 133 of the first hydraulic support 130 when the bottom adjustment action of the bottom adjustment cylinder 134 of the first hydraulic support 130 reaches a preset stop condition, thereby completing the automatic bottom adjustment of the first hydraulic support 130.

[0126] It should be noted that the first hydraulic support 130 and the third hydraulic support 130 are used to distinguish between two hydraulic supports.

[0127] In this embodiment, Figure 3 As shown, when the transporter 160 moves toward the nose, the first hydraulic support 130 needs to move toward the tail of the transporter 160, and the bottom extension adjustment mode needs to select 0: main frame moves the adjacent frame and bottom extension adjustment. At this time, the third hydraulic support 130 is the main frame and the first hydraulic support 130 is the adjacent frame.

[0128] When the hydraulic support is extended and bottom adjusted, the bottom adjustment cylinder 134 of the first hydraulic support 130 extends toward the third hydraulic support 130 and contacts the third hydraulic support 130 , thereby generating a driving force to push the third hydraulic support 130 to move toward the nose of the conveyor 160 .

[0129] Among them, the third hydraulic support 130 is moved toward the nose direction of the conveyor 160, and the direction of the driving force of the bottom adjustment cylinder 134 of the first hydraulic support 130 to push the third hydraulic support should be in the nose direction of the conveyor 160. Therefore, from the nose to the tail direction, there are the third hydraulic support 130 and the first hydraulic support 130 in turn.

[0130] In this embodiment, when the conveyor moves toward the nose, the bottom adjustment mode of the adjacent frame is used to extend the bottom adjustment cylinder of the first hydraulic support to extend toward the third hydraulic support, thereby generating a driving force, thereby driving the third hydraulic support to move toward the nose of the conveyor, thereby realizing precise movement of the hydraulic support, and the third hydraulic support is perpendicular to the conveyor, thereby improving the safety of coal mining.

[0131] In view of the system for automatically extending and adjusting the bottom of a hydraulic support provided in the above embodiment, an embodiment of the present application provides a method for automatically extending and adjusting the bottom of a hydraulic support. Figure 4 As shown, the method shown in this embodiment includes:

[0132] S401. Obtain the movement direction of the conveyor when the working face is advancing.

[0133] In this embodiment, the staff can obtain the moving direction of the conveyor when the working surface is advanced through on-site inspection, for example. The moving direction of the conveyor includes the nose direction and the tail direction.

[0134] S402, selecting the bottom extension adjustment mode on the upper computer according to the moving direction of the conveyor.

[0135] In this embodiment, when the moving direction of the conveyor is the nose direction, the current rack moving and bottom adjustment mode is selected; when the moving direction of the conveyor is the nose direction, the current rack moving and bottom adjustment mode of the adjacent rack is selected.

[0136] S403, selecting the bottom extension adjustment control mode on the host computer, and obtaining the target bottom extension adjustment control instruction.

[0137] In this embodiment, the bottom extension and adjustment control modes include a time control mode, a stroke control mode and a mixed control mode.

[0138] S404: The controller obtains a target bottom extension adjustment control instruction, and obtains and executes a control logic corresponding to the target bottom extension adjustment control instruction according to the target bottom extension adjustment control instruction.

[0139] In this embodiment, the controller implements a method for the hydraulic support to automatically move the support frame according to the control logic, which is described in the above embodiment and will not be repeated here.

[0140] The automatic extension and bottom adjustment control method of the hydraulic support provided in the embodiment of the present application can be applied to the automatic extension and bottom adjustment control system of the hydraulic support shown in any of the above embodiments. Its implementation principle and technical effects are similar and will not be repeated here.

[0141] Those skilled in the art can understand that all or part of the steps of implementing the above-mentioned method embodiments can be completed by hardware related to program instructions. The aforementioned program can be stored in a computer-readable storage medium. When the program is executed, the steps of the above-mentioned method embodiments are executed; and the aforementioned storage medium includes: ROM, RAM, disk or optical disk and other media that can store program codes.

[0142] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, ordinary technicians in the field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. An intelligent control system for automatic bottom extension and adjustment of hydraulic supports in coal mining, characterized in that: include: Host computer, switch and first hydraulic support; The first hydraulic support comprises: a first controller, a first push driver, a first bottom adjustment driver, a first push solenoid valve, a first push oil cylinder, a first bottom adjustment solenoid valve and a first bottom adjustment oil cylinder; The host computer is connected to the switch, the switch is connected to the first controller, the first controller is connected to the first push driver and the first bottom adjustment driver, the first bottom adjustment driver is connected to the first bottom adjustment solenoid valve, the first push driver is connected to the first push solenoid valve, and the first controller is provided with control logic corresponding to different extension and bottom adjustment control instructions; The host computer is used to generate a target bottom extension control instruction according to the instruction information input by the user, and send the target bottom extension control instruction to the first controller through the switch, wherein the instruction information is input by the user according to the movement direction of the conveyor; The first controller is used to receive the target bottom extension control instruction sent by the switch, obtain instruction information in the bottom extension control instruction, and obtain and execute the control logic corresponding to the target bottom extension control instruction according to the instruction information; When the first controller executes the control logic corresponding to the target extension and bottom adjustment control instruction, it is used to control the first push driver to open the first push solenoid valve according to the instruction information; it is also used to control the first bottom adjustment driver to open the first bottom adjustment solenoid valve when the first push time of the first push oil cylinder reaches the first preset time, and the first bottom adjustment oil cylinder starts to extend and bottom adjust; it is also used to control the first bottom adjustment driver to switch the opening direction of the first bottom adjustment solenoid valve when the first push time of the first push oil cylinder reaches the second preset time, so as to retract the first bottom adjustment oil cylinder, and after the first bottom adjustment oil cylinder retracts, control the first bottom adjustment driver to close the first bottom adjustment solenoid valve; wherein, the second preset time is greater than the first preset time; The first push driver is used to open and close the first push solenoid valve under the control of the first controller. The first bottom adjustment driver is used to open and close the first bottom adjustment solenoid valve under the control of the first controller, and to switch the opening direction of the first bottom adjustment solenoid valve when the first bottom adjustment solenoid valve is opened; The first push solenoid valve is used to supply hydraulic pressure to the first push cylinder when it is opened under the control of the first push driver, and to stop supplying hydraulic pressure to the first push cylinder when it is closed under the control of the first push driver; The first push cylinder is used to perform a pushing action when the first push solenoid valve is opened; The first bottom adjustment solenoid valve is used to provide hydraulic pressure to the first bottom adjustment cylinder when it is opened under the control of the first bottom adjustment driver, so that the first bottom adjustment cylinder is extended for bottom adjustment, and when the first pushing time of the first pushing cylinder reaches a second preset time, switch the opening direction of the first bottom adjustment solenoid valve to retract the first bottom adjustment cylinder, thereby driving the first hydraulic support to move in the direction of the conveyor movement.

2. The system according to claim 1, characterized in that The first hydraulic support further includes: a first displacement stroke sensor; The first displacement sensor is connected to the first controller; The first push stroke sensor is used to obtain the push stroke of the first push cylinder and send the first push stroke to the first controller; The first controller is used to receive the first displacement stroke sent by the displacement stroke sensor, and control the first bottom adjustment driver to open the first bottom adjustment solenoid valve when the first displacement stroke reaches a first preset displacement stroke; and is also used to control the first bottom adjustment driver to switch the opening direction of the first bottom adjustment solenoid valve when the first displacement stroke reaches a second preset displacement stroke, so as to retract the first bottom adjustment cylinder; wherein the value of the first preset displacement stroke is greater than the value of the second preset displacement stroke; and / or, The controller is used to receive the first pushing stroke sent by the pushing stroke sensor, and when the first pushing stroke reaches the first preset pushing stroke and / or the first pushing duration of the first pushing cylinder reaches the first preset duration, control the first bottom adjustment driver to open the first bottom adjustment solenoid valve, and the first bottom adjustment cylinder starts to extend and adjust the bottom; and is also used to control the first bottom adjustment driver to switch the opening direction of the first bottom adjustment solenoid valve when the first pushing stroke reaches the second preset pushing stroke and / or the first pushing duration of the first pushing cylinder reaches the second preset duration, so as to retract the first bottom adjustment cylinder.

3. The system according to claim 2, characterized in that The first hydraulic support further includes: a first column solenoid valve, a first column, a first column oil cylinder, a first column sensor pressure and a first column driver; The first column driver is connected to the first controller and the first column solenoid valve, and the first column sensor pressure is connected to the first controller; The first controller is used to control the first column driver to open the first column solenoid valve when the first shifting time of the first shifting oil cylinder reaches a first preset time; and is also used to control the first bottom adjustment driver to open the first bottom adjustment solenoid valve to retract the first bottom adjustment oil cylinder when the first shifting time of the first shifting oil cylinder reaches a first preset column pressure; and is also used to control the first bottom adjustment driver to close the first bottom adjustment solenoid valve when the first bottom adjustment oil cylinder is fully retracted; The first column solenoid valve is used to supply hydraulic pressure to the first column cylinder when it is opened under the control of the first column driver, and to stop supplying hydraulic pressure to the first column cylinder when it is closed under the control of the first column driver; The first column oil cylinder is used to push the first column up when the first column solenoid valve is opened; The first column sensor pressure is used to obtain the first column pressure and send the first column pressure to the first controller.

4. The system according to any one of claims 1 to 3, characterized in that: The hydraulic support automatic extension and bottom adjustment control system further includes: a second hydraulic support; The first hydraulic support and the second hydraulic support are adjacent to each other; The second hydraulic support is used to drive the first hydraulic support to move in the direction of the conveyor when the first bottom adjustment cylinder of the first hydraulic support is extended, and the first bottom adjustment cylinder is supported by the second hydraulic support.

5. The system according to claim 4, characterized in that The second hydraulic support and the first hydraulic support are arranged in sequence along the moving direction of the conveyor.

6. The system according to any one of claims 1 to 3, characterized in that: The hydraulic support automatic extension and bottom adjustment control system further includes: a third hydraulic support; The first hydraulic support and the third hydraulic support are adjacent to each other; The first bottom adjustment solenoid valve is used to provide hydraulic pressure to the first bottom adjustment cylinder when the first bottom adjustment solenoid valve is opened, so that the first bottom adjustment cylinder pushes the third hydraulic support to move in the direction of the conveyor; The first controller is also used to control the first bottom adjustment driver to close the first bottom adjustment solenoid valve when the bottom adjustment action of the first bottom adjustment cylinder reaches a preset stop condition, thereby completing the automatic bottom adjustment of the first hydraulic support.

7. The system according to claim 6, characterized in that The first hydraulic support and the third hydraulic support are arranged in sequence along the moving direction of the conveyor.

8. The system according to any one of claims 1 to 3, characterized in that: The host computer is connected to the switch via an optical fiber.

9. The system according to any one of claims 1 to 3, characterized in that: The switch is connected to the first controller via an optical fiber.

10. The system according to claim 3, characterized in that The first bottom adjustment solenoid valve, the first push solenoid valve and the first column solenoid valve constitute a solenoid valve group.

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