Digital valve control type mining intelligent oil cylinder and control method thereof

Abstract

The invention relates to the technical field of intelligent control, and discloses a digital valve control type mining intelligent oil cylinder and a control method thereof. The temperature and pressure of high-water-base emulsion media in the rodless cavity and the rod cavity of the oil cylinder body are detected through the temperature and pressure sensor, so that data are transmitted to the controller in real time, and meanwhile, the displacement sensor can collect the positions of the oil cylinder body before and after movement; the oil cylinder body is arranged on the base and can collect the speed of the oil cylinder body in the moving process so that collected data can be transmitted to the controller, the controller can conveniently output an adjusting signal according to the data, the adjusting signal controls the opening degree of the digital valve to be adjusted, and then the amount of a high-water-base emulsion medium flowing into the oil cylinder body is controlled. Accurate control over the motion of the oil cylinder body is achieved, the control precision of the position and the speed of the oil cylinder body is improved, and therefore the working efficiency and safety of mining equipment are improved.

Description

Technical Field

[0001] The present invention relates to the field of intelligent control technology, in particular to a digital valve controlled mining intelligent oil cylinder and a control method thereof. Background Art

[0002] In mining and the operation of mining equipment, hydraulic cylinders are key driving devices and are widely used in lifting, supporting, bulldozing, excavating and other operations. In the existing technology, the fault detection and early warning functions of intelligent cylinders are relatively simple, and intelligent self-diagnosis and maintenance cannot be realized. The comprehensive performance of the intelligent cylinder as a system is not taken into account, resulting in insufficient control accuracy and slow response speed. It is difficult to adapt to the complex mining operation environment and it is difficult to meet the needs of modern mining equipment for high efficiency, high reliability and intelligence.

[0003] At present, Chinese patent CN104632779A discloses a hydraulic intelligent oil cylinder for a loader boom. This invention only integrates displacement sensing on the cylinder, and the valve block, controller, etc. are still installed separately. The integration is insufficient, resulting in little improvement in the control accuracy and response speed of the system. At the same time, long pipeline connections are prone to pipeline rupture or loose sealing at the joints, which leads to system oil leakage, environmental pollution, and poor reliability; Chinese patent CN116816762A discloses a high-precision digital hydraulic oil cylinder, which drives the gear set to rotate through a servo motor to quantitatively press hydraulic oil into the rod cavity or rodless cavity of the cylinder body to accurately control the moving speed or displacement of the cylinder piston, but the present invention lacks the fault detection and early warning functions of the intelligent oil cylinder, and cannot realize intelligent self-diagnosis and maintenance. With the continuous development of mining machinery, higher requirements are put forward for the performance and intelligence level of hydraulic oil cylinders. There is an urgent need for a system that can monitor and intelligently control the oil cylinder in real time and with high precision to improve the working efficiency and safety of mining equipment.

[0004] Currently, no effective solution has been proposed for the problems in the related technologies. Summary of the invention

[0005] 1. Technical issues to be resolved

[0006] In view of the shortcomings of the prior art, the present invention provides a digital valve-controlled mining intelligent cylinder and a control method thereof, which has the advantages of controlling the amount of high-water-based emulsion medium flowing into the cylinder body, realizing precise control of the movement of the cylinder body, improving the control accuracy of the position and speed of the cylinder body, and solving the problem of low precision of the cylinder body.

[0007] (II) Technical solution

[0008] In order to solve the technical problem of low precision of the above-mentioned oil cylinder body, the present invention provides the following technical solution:

[0009] A digital valve controlled mining intelligent oil cylinder, comprising an oil cylinder body:

[0010] The oil cylinder body is respectively equipped with a controller, a digital valve, a temperature and pressure sensor, and a displacement sensor;

[0011] The bottom of the oil cylinder body is provided with an inlet A and an outlet B, the rod chamber of the oil cylinder body is connected to the inside of the inlet A through a hard pipe, and the inside of the rodless chamber of the oil cylinder body is connected to the inside of the outlet B;

[0012] The controller has a bottom end fixedly mounted on the top end of the oil cylinder body so that the controller can control data transmission;

[0013] The oil inlet and return ports of the digital valve are aligned with the inlet A and the outlet B respectively, and the digital valve is fixedly installed with the cylinder body by bolts, so that the high water-based emulsion medium flows into the rod cavity and the rodless cavity of the cylinder body through the digital valve;

[0014] The temperature and pressure sensor, one side of which is fixed on the oil cylinder body and the digital valve respectively, so that the high water-based emulsion medium in the rodless chamber of the oil cylinder body is connected to the temperature and pressure sensor through the C port, so that the temperature and pressure sensor can detect the high water-based emulsion medium;

[0015] One side of the displacement sensor is mounted on the oil cylinder body, so that when the oil cylinder body moves, the displacement sensor can detect the moving distance.

[0016] Preferably, the digital valve comprises four groups of two-position three-way switch valves and valve cores, the high-water-based emulsion medium enters from the P port of the digital valve, so that the two-position three-way switch valves D1 and D2 are in a connected state with the signal of the controller, and the two-position three-way switch valves E1 and E2 are in a closed state, and the high-water-based emulsion medium respectively enters the control chamber f1 of the first joint valve and the interior of the second joint valve g2 through the pilot line, so that the high-water-based emulsion pushes the valve core to extend, so that the P port is connected to the inlet A of the oil cylinder body, and the outlet B of the oil cylinder body is connected to the T port, so that the piston inside the oil cylinder body is retracted;

[0017] The high water-based emulsion medium enters from the P port of the digital valve, so that the two-position three-way switch valves E1 and E2 are in a connected state with the signal of the controller, and the two-position three-way switch valves D1 and D2 are in a closed state. The high water-based emulsion medium enters the control chamber f2 of the first joint valve and the control chamber g1 of the second joint valve respectively through the pilot line, so that the high water-based emulsion pushes the valve core to retract, so that the P port is connected to the outlet B of the cylinder body, and the inlet A of the cylinder body is connected to the T port, so that the piston inside the cylinder body extends.

[0018] Preferably, the interior of the controller is electrically connected to the interior of the temperature and pressure sensor and the displacement sensor respectively, so that the temperature and pressure sensor and the displacement sensor transmit data to the interior of the controller.

[0019] Preferably, a piston rod is fixedly mounted at one end of the piston, and a plurality of groups of marks are provided on the outer surface of the piston rod so that the displacement sensor measures the displacement distance according to the marks. The displacement sensor adopts an encoder so that the encoder provides position and speed information of the piston rod for transmitting the information to the controller.

[0020] Preferably, the temperature and pressure sensor is an integrated structure, and the signal output end of the temperature and pressure sensor is connected to the controller, so that the temperature and pressure sensor can detect the temperature of the high water-based emulsion medium, and can detect the working pressure of the high water-based emulsion medium inside the rod chamber and the rodless chamber of the cylinder body.

[0021] A control method for a digital valve controlled mining intelligent oil cylinder.

[0022] The controller adjusts the opening and closing of the four groups of two-position three-way switch valves on the digital valve according to the signals fed back by the temperature and pressure sensors and the displacement sensors, thereby controlling the opening of the main valve core of the two-valve, and then controlling the high-water-based emulsion medium flowing into the rod chamber and the rodless chamber of the cylinder body, thereby achieving precise control of the piston rod displacement of the cylinder body and the pressure in the cavity.

[0023] (III) Beneficial effects

[0024] Compared with the prior art, the present invention provides a digital valve controlled mining intelligent oil cylinder and a control method thereof, which has the following beneficial effects:

[0025] 1. The present invention detects the temperature and pressure of the high-water-based emulsion medium inside the rodless cavity and the rod cavity of the oil cylinder body through temperature and pressure sensors, so that the data can be transmitted to the controller in real time. At the same time, the displacement sensor can collect the position of the oil cylinder body before and after movement, and can collect its speed during movement, so that it can transmit the collected data to the controller, so that the controller can output an adjustment signal according to the data, so that the adjustment signal controls the opening and closing degree of the digital valve, and then controls the amount of the high-water-based emulsion medium flowing into the oil cylinder body, thereby realizing precise control of the movement of the oil cylinder body, improving the control accuracy of the position and speed of the oil cylinder body, and improving the working efficiency and safety of mining equipment.

[0026] 2. The present invention monitors the position and pressure signals of the oil cylinder body in real time through temperature and pressure sensors and displacement sensors. The controller outputs adjustment signals according to the monitoring signals. The switch valves D1, D2, E1, and E2 on the digital valve receive signals and maintain different opening and closing states, so that the two-link main valve core control chambers f1, f2, g1, and g2 are stressed, thereby accurately controlling the valve core opening of the digital valve, and then controlling the high-water-based emulsion medium flowing into the oil cylinder body, thereby reducing the connection of external pipelines, reducing the risk of leakage, improving the reliability of the system, and simplifying the installation and maintenance process.

[0027] 3. The present invention uses a temperature and pressure sensor to detect the real-time temperature of the high-water-based emulsion medium and the working pressure of the rod chamber and the rodless chamber of the cylinder body. The output signal of the temperature and pressure sensor is connected to the controller to provide real-time oil temperature and oil pressure data to the controller, so that the real-time monitoring function of the temperature and pressure sensor can detect equipment abnormalities in time, provide fault diagnosis and early warning, and improve the safety and reliability of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0029] Figure 2 It is a schematic diagram of the structure of the present invention from a front view perspective;

[0030] Figure 3 It is a structural schematic diagram of the piston rod of the present invention;

[0031] Figure 4 It is a schematic diagram of the PA and BT oil circuits of the digital valve of the present invention;

[0032] Figure 5 This is a cross-sectional view of the first PA structure of the digital valve of the present invention;

[0033] Figure 6 This is a cross-sectional view of the second BT structure of the digital valve of the present invention;

[0034] Figure 7 It is the control principle diagram of the present invention.

[0035] In the figure: 1. Controller; 2. Digital valve; 3. Cylinder body; 4. Temperature and pressure sensor; 5. Displacement sensor. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] As introduced in the background technology, there are deficiencies in the prior art. In order to solve the above technical problems, the present application proposes a digital valve-controlled mining intelligent cylinder and a control method thereof.

[0038] Embodiment 1:

[0039] See also Figure 1 and Figure 2 , a digital valve controlled mining intelligent oil cylinder, comprising an oil cylinder body 3:

[0040] The oil cylinder body 3 is respectively equipped with a controller 1, a digital valve 2, a temperature and pressure sensor 4 and a displacement sensor 5;

[0041] The bottom of the oil cylinder body 3 is provided with an inlet A and an outlet B, the rod cavity of the oil cylinder body 3 is connected to the inside of the inlet A through a hard pipe, and the inside of the rodless cavity of the oil cylinder body 3 is connected to the inside of the outlet B;

[0042] The controller 1 has its bottom end fixedly mounted on the top end of the oil cylinder body 3 so that the controller 1 controls data transmission;

[0043] The digital valve 2, whose oil inlet and return ports are aligned with the inlet A and the outlet B respectively, is fixedly installed with the digital valve 2 and the oil cylinder body 3 by bolts, so that the high water-based emulsion medium flows into the rod cavity and the rodless cavity of the oil cylinder body 3 through the digital valve 2;

[0044] A temperature and pressure sensor 4, one side of which is fixed on the oil cylinder body 3 and the digital valve 2, respectively, so that the high water-based emulsion medium in the rodless chamber of the oil cylinder body 3 is connected to the temperature and pressure sensor 4 through the C port, so that the temperature and pressure sensor 4 can detect the high water-based emulsion medium;

[0045] The displacement sensor 5 has one side mounted on the cylinder body 3 so that when the cylinder body 3 moves, the displacement sensor 5 detects the moving distance.

[0046] When in use, the temperature and pressure of the high-water-based emulsion medium inside the rodless cavity and the rod cavity of the cylinder body 3 are detected by the temperature and pressure sensor 4, so that the data can be transmitted to the controller 1 in real time. At the same time, the displacement sensor 5 can collect the position of the cylinder body 3 before and after movement, and can collect its speed during movement, so that it can transmit the collected data to the controller 1, so that the controller 1 can output an adjustment signal according to the data, so that the adjustment signal controls the opening and closing degree of the digital valve 2, and then controls the amount of the high-water-based emulsion medium flowing into the cylinder body 3.

[0047] The present invention detects the temperature and pressure of the high-water-based emulsion medium inside the rodless cavity and the rod cavity of the cylinder body 3 through the temperature and pressure sensor 4, so that the data can be transmitted to the controller 1 in real time. At the same time, the displacement sensor 5 can collect the position of the cylinder body 3 before and after movement, and can collect its speed during movement, so that it can transmit the collected data to the controller 1, so that the controller 1 outputs an adjustment signal according to the data, so that the adjustment signal controls the opening and closing degree of the digital valve 2, and then controls the amount of the high-water-based emulsion medium flowing into the cylinder body 3, thereby realizing precise control of the movement of the cylinder body 3, improving the control accuracy of the position and speed of the cylinder body 3, and improving the working efficiency and safety of mining equipment.

[0048] Embodiment 2:

[0049] The difference from the above embodiment is that, see Figure 4 , Figure 5 and Figure 6 The digital valve 2 includes four groups of two-position three-way switch valves and valve cores. The high-water-based emulsion medium enters from the P port of the digital valve 2, so that the two-position three-way switch valves D1 and D2 are in a connected state with the signal of the controller 1, and the two-position three-way switch valves E1 and E2 are in a closed state. The high-water-based emulsion medium enters the control chamber f1 of the first joint valve and the interior of the second joint valve g2 through the pilot line, so that the high-water-based emulsion pushes the valve core to extend, so that the P port is connected to the inlet A of the oil cylinder body 3, and the outlet B of the oil cylinder body 3 is connected to the T port, so that the piston inside the oil cylinder body 3 is retracted;

[0050] The high-water-based emulsion medium enters from the P port of the digital valve 2, so that the two-position three-way switch valves E1 and E2 are in a connected state with the signal of the controller 1, and the two-position three-way switch valves D1 and D2 are in a closed state. The high-water-based emulsion medium enters the control chamber f2 of the first joint valve and the control chamber g1 of the second joint valve through the pilot line, so that the high-water-based emulsion pushes the valve core to retract, so that the P port is connected to the outlet B of the cylinder body 3, and the inlet A of the cylinder body 3 is connected to the T port, so that the piston inside the cylinder body 3 extends.

[0051] The position and pressure signals of the oil cylinder body 3 are monitored in real time by the temperature and pressure sensor 4 and the displacement sensor 5. The controller 1 outputs an adjustment signal according to the monitoring signal. The switch valves D1, D2, E1, and E2 on the digital valve 2 receive the signal and maintain different opening and closing states, so that the two-link main valve core control chambers f1, f2, g1, and g2 are subjected to force, thereby accurately controlling the valve core opening of the digital valve 2, and then controlling the high-water-based emulsion medium flowing into the oil cylinder body 3, thereby realizing accurate control of the movement of the oil cylinder body 3 and improving the control accuracy of the position and speed of the oil cylinder body 3.

[0052] Embodiment three:

[0053] The difference from the above embodiment is that, see Figure 1 The interior of the controller 1 is electrically connected to the interior of the temperature and pressure sensor 4 and the displacement sensor 5 respectively, so that the temperature and pressure sensor 4 and the displacement sensor 5 transmit data to the interior of the controller 1.

[0054] The temperature and pressure of the high-water-based emulsion medium inside the rodless cavity and the rod cavity of the cylinder body 3 are detected by the temperature and pressure sensor 4, so that the data can be transmitted to the controller 1 in real time. At the same time, the displacement sensor 5 can collect the position of the cylinder body 3 before and after movement, and can collect its speed during movement, so that it can transmit the collected data to the controller 1, so that the controller 1 can adjust the signal according to the data output.

[0055] Embodiment 4:

[0056] The difference from the above embodiment is that, see Figure 1 and Figure 3 A piston rod is fixedly mounted at one end of the piston, and a plurality of marks are arranged on the outer surface of the piston rod so that the displacement sensor 5 can measure the displacement distance according to the marks. The displacement sensor 5 adopts an encoder so that the encoder can provide the position and speed information of the piston rod for transmitting the information to the controller 1.

[0057] When the piston rod moves inside the cylinder body 3, it can drive the multiple groups of marks set on its outer surface to move. Since the setting of the marks is convenient for the displacement sensor 5 to detect, the moving distance and moving speed of the piston rod can be detected by the displacement sensor 5, so as to transmit the detected data to the controller 1.

[0058] Embodiment five:

[0059] The difference from the above embodiment is that, see Figure 1 The temperature and pressure sensor 4 is an integrated structure, and the signal output end of the temperature and pressure sensor 4 is connected to the controller 1, so that the temperature and pressure sensor 4 can measure the temperature of the high water-based emulsion medium, and can measure the working pressure of the high water-based emulsion medium in the rod chamber and the rodless chamber of the cylinder body 3.

[0060] The temperature and pressure sensor 4 is used to detect the real-time temperature of the high water-based emulsion medium and the working pressure of the rod chamber and the rodless chamber of the cylinder body 3. The output signal of the temperature and pressure sensor 4 is connected to the controller 1 to provide real-time oil temperature and oil pressure data to the controller 1.

[0061] Embodiment six:

[0062] A control method for a digital valve controlled mining intelligent oil cylinder.

[0063] The controller 1 adjusts the opening and closing of the four groups of two-position three-way switch valves on the digital valve 2 according to the signals fed back by the temperature and pressure sensor 4 and the displacement sensor 5, thereby controlling the opening of the main valve core of the two-valve, and then controlling the high-water-based emulsion medium flowing into the rod chamber and the rodless chamber of the cylinder body 3, thereby realizing precise control of the piston rod displacement and the pressure in the chamber of the cylinder body 3.

[0064] Working principle: When in use, the analog signal fed back by the temperature and pressure sensor 4 and the coded signal fed back by the displacement sensor 5 are input into the controller 1. The controller 1 adjusts the duty cycle of the PWM signal of the two-position three-way electromagnetic switch valve according to the processed signal to accurately control the opening degree of the valve, thereby controlling the opening of the first two-way valve core of the digital valve 2, and then controlling the high-water-based emulsion medium flowing into the rod chamber and the rodless chamber of the cylinder body 3, so as to realize the precise control of the displacement and pressure of the extension and retraction of the piston rod. When the two-position three-way electromagnetic switch valves D1 and D2 are energized, the switch valves are in the left position, and the high-water-based emulsion medium pushes the first and second main valves to move right, so that the high-water-based emulsion medium flows from the P port through the A port into the rod chamber of the cylinder body 3, and the high-water-based emulsion medium inside the rodless chamber of the cylinder body 3 flows back to the oil tank from the B port through the T port, and the piston rod of the cylinder body 3 retracts; when the two-position three-way electromagnetic switch valves D1 and D2 are de-energized and are in the right position, and E1 and E2 are energized and are in the left position, the high-water-based emulsion medium pushes the first and second main valves to move left, so that the high-water-based emulsion medium flows from the P port through the B port into the rodless chamber of the cylinder body 3, and the high-water-based emulsion medium inside the rod chamber of the cylinder body 3 flows back to the oil tank from the A port through the T port, and the piston rod of the cylinder body 3 extends.

[0065] Through the above technical scheme, 1. The temperature and pressure of the high-water-based emulsion medium inside the rodless cavity and the rod cavity of the cylinder body 3 are detected by the temperature and pressure sensor 4, so that the data can be transmitted to the controller 1 in real time. At the same time, the displacement sensor 5 can collect the position of the cylinder body 3 before and after the movement, and can collect the speed during the movement, so that the collected data can be transmitted to the controller 1, so that the controller 1 can output an adjustment signal according to the data, so that the adjustment signal controls the opening and closing degree of the digital valve 2, and then controls the amount of the high-water-based emulsion medium flowing into the cylinder body 3, so as to realize the precise control of the movement of the cylinder body 3, improve the control accuracy of the position and speed of the cylinder body 3, and improve the working efficiency and safety of the mining equipment;

[0066] 2. The position and pressure signals of the oil cylinder body 3 are monitored in real time by the temperature and pressure sensor 4 and the displacement sensor 5. The controller 1 outputs the adjustment signal according to the monitoring signal. The switch valves D1, D2, E1, and E2 on the digital valve 2 receive the signal and maintain different opening and closing states, so that the two-link main valve core control chambers f1, f2, g1, and g2 are stressed, thereby accurately controlling the valve core opening of the digital valve 2, and then controlling the high-water-based emulsion medium flowing into the oil cylinder body 3, thereby reducing the connection of external pipelines, reducing the risk of leakage, improving the reliability of the system, and simplifying the installation and maintenance process;

[0067] 3. The temperature and pressure sensor 4 is used to detect the real-time temperature of the high-water-based emulsion medium and the working pressure of the rod chamber and the rodless chamber of the cylinder body 3. The output signal of the temperature and pressure sensor 4 is connected to the controller 1 to provide real-time oil temperature and oil pressure data to the controller 1, so that the real-time monitoring function of the temperature and pressure sensor 4 can detect equipment abnormalities in time, provide fault diagnosis and early warning, and improve the safety and reliability of the equipment.

[0068] While the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that many changes, modifications, substitutions and variations can be made to the embodiments without departing from the principles and spirit of the invention.

Claims

1. A digital valve controlled mining intelligent oil cylinder, comprising an oil cylinder body (3), characterized in that: The oil cylinder body (3) is respectively equipped with a controller (1), a digital valve (2), a temperature and pressure sensor (4) and a displacement sensor (5); The bottom of the oil cylinder body (3) is provided with an inlet A and an outlet B, the rod chamber of the oil cylinder body (3) is connected to the interior of the inlet A through a hard pipe, and the interior of the rodless chamber of the oil cylinder body (3) is connected to the interior of the outlet B; The controller (1) has its bottom end fixedly mounted on the top end of the oil cylinder body (3) so that the controller (1) can control data transmission; The oil inlet and return ports of the digital valve (2) are aligned with the inlet A and the outlet B respectively, and the digital valve (2) is fixedly mounted on the oil cylinder body (3) by bolts, so that the high water-based emulsion medium flows into the rod cavity and the rodless cavity of the oil cylinder body (3) through the digital valve (2); The temperature and pressure sensor (4) has one side fixed on the oil cylinder body (3) and the digital valve (2) respectively, so that the high water-based emulsion medium in the rodless chamber of the oil cylinder body (3) is connected to the temperature and pressure sensor (4) through the C port, so that the temperature and pressure sensor (4) can detect the high water-based emulsion medium; One side of the displacement sensor (5) is mounted on the oil cylinder body (3), so that when the oil cylinder body (3) moves, the displacement sensor (5) detects the moving distance.

2. The digital valve controlled mining intelligent oil cylinder according to claim 1 is characterized in that: The digital valve (2) comprises four groups of two-position three-way switch valves and valve cores. The high-water-based emulsion medium enters from the P port of the digital valve (2), so that the two-position three-way switch valves D1 and D2 are in a connected state with the signal of the controller (1), and the two-position three-way switch valves E1 and E2 are in a closed state. The high-water-based emulsion medium enters the control chamber f1 of the first joint valve and the interior of the second joint valve g2 through the pilot line, so that the high-water-based emulsion pushes the valve core to extend, so that the P port is connected to the inlet A of the oil cylinder body (3), and the outlet B of the oil cylinder body (3) is connected to the T port, so that the piston inside the oil cylinder body (3) is retracted; The high water-based emulsion medium enters from the P port of the digital valve (2), so that the two-position three-way switch valves E1 and E2 are in a connected state with the signal of the controller (1), and the two-position three-way switch valves D1 and D2 are in a closed state. The high water-based emulsion medium enters the control chamber f2 of the first joint valve and the control chamber g1 of the second joint valve through the pilot line, so that the high water-based emulsion pushes the valve core to retract, so that the P port is connected to the outlet B of the cylinder body (3), and the inlet A of the cylinder body (3) is connected to the T port, so that the piston inside the cylinder body (3) extends.

3. The digital valve controlled mining intelligent oil cylinder according to claim 1 is characterized in that: The interior of the controller (1) is electrically connected to the interior of the temperature and pressure sensor (4) and the displacement sensor (5) respectively, so that the temperature and pressure sensor (4) and the displacement sensor (5) transmit data to the interior of the controller (1).

4. The digital valve controlled mining intelligent oil cylinder according to claim 1 is characterized in that: A piston rod is fixedly mounted on one end of the piston, and a plurality of groups of marks are arranged on the outer surface of the piston rod so that the displacement sensor (5) can measure the displacement distance according to the marks. The displacement sensor (5) uses an encoder so that the encoder can provide position and speed information of the piston rod for transmitting the information to the controller (1).

5. The digital valve controlled mining intelligent oil cylinder according to claim 1 is characterized in that: The temperature and pressure sensor (4) is an integrated structure, and the signal output end of the temperature and pressure sensor (4) is connected to the controller (1) so that the temperature and pressure sensor (4) can detect the temperature of the high-water-based emulsion medium and the working pressure of the high-water-based emulsion medium inside the rod chamber and the rodless chamber of the cylinder body (3).

6. A control method for a digital valve-controlled mining intelligent cylinder according to claim 1, characterized in that: The controller (1) adjusts the opening and closing of the four groups of two-position three-way switch valves on the digital valve (2) according to the signals fed back by the temperature and pressure sensor (4) and the displacement sensor (5), thereby controlling the opening of the main valve core of the two-valve, and further controlling the high-water-based emulsion medium flowing into the rod chamber and the rodless chamber of the oil cylinder body (3), thereby realizing precise control of the piston rod displacement and the pressure in the chamber of the oil cylinder body (3).

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