A control system and control method for improving the safety of pile driver construction

Abstract

This invention discloses a control system for improving the safety of pile driver construction, comprising: a hydraulic oil tank, a hydraulic pump, a pressure reducing valve, a three-position four-way directional valve, a one-way hydraulic lock, a two-way hydraulic lock, a clamping cylinder, a pressure sensor, an instrument display, a controller, a self-resetting slide key, and a working device action switch. The controller is electrically connected to the hydraulic pump, the three-position four-way directional valve, the pressure sensor, the instrument display, the self-resetting slide key, and the working device action switch. The hydraulic oil tank is connected to the hydraulic pump, the pressure reducing valve, the three-position four-way directional valve, the one-way hydraulic lock, the two-way hydraulic lock, and the hydraulic cylinder in sequence via hydraulic pipelines. The pressure sensor is used to detect the oil pressure at the outlet of the one-way hydraulic lock. By adding a pressure sensor and sending the clamping pressure to the controller, and by adding judgment logic to the main controller to display the clamping oil circuit status on the instrument, and by adding judgment logic to the pile loosening action in the controller, safety accidents caused by operator error are reduced.

Description

Technical Field

[0001] This invention relates to engineering machinery, and more specifically to a control method for a control system that improves the construction safety of a pile driver. Background Technology

[0002] Currently, the clamping hydraulic circuit in pile driver control systems uses a pressure-holding valve added to the front of the hydraulic cylinder to maintain clamping pressure. The extension and retraction of the clamping cylinder is controlled by a toggle switch, thus controlling the opening and closing of the clamping jaws. In actual construction, when clamping and moving casing piles or sheet piles to the construction position, the operator must constantly keep the toggle switch in the clamping position to prevent the casing piles from falling off. Many excavator operators have now transitioned to pile driver operation, and the operating methods of the two machines differ greatly. During actual construction, the operator still needs to operate the levers to control the position and angle of the boom and stick, making it easy to forget to keep the toggle switch in the correct position. This can even lead to accidentally setting the switch to the loosened position, causing a safety accident.

[0003] The existing invention patent "CN115450210A_Control method, controller and clamping device for clamping device of engineering machinery" mainly obtains the state of the vibration pedal and the controller can continuously output voltage value to the clamping solenoid valve so that the clamping cylinder can continuously perform the extension action, thereby avoiding safety hazards such as pile falling due to misoperation during vibration pile driving and pulling.

[0004] However, the control logic in this patented solution is basically similar to that of the market reform solution. This solution is mainly aimed at the large excitation force generated by the vibration of the pile hammer during actual pile driving or pile extraction. This excitation force can easily cause the sheet pile or casing pile to come out of the clamping mouth of the machine. Therefore, oil will be continuously supplied to the clamping oil circuit during vibration. However, this solution cannot detect the actual pressure state of the clamping oil circuit when clamping the pile, nor can it determine whether the clamping oil circuit is suitable for this working condition based on different construction conditions. Summary of the Invention

[0005] To address the problems existing in the prior art, this invention provides a control method for improving the safety of a pile driver construction system. By adding a pressure sensor to the clamping oil circuit and sending the clamping pressure to the controller, and by adding judgment logic to the main controller to display the clamping oil circuit status on the instrument, and by adding judgment logic to the pile loosening action in the controller, safety accidents caused by driver error are reduced.

[0006] To achieve the above objectives, the technical solution adopted by this invention is: a control system for improving the construction safety of a pile driver, comprising: a hydraulic oil tank, a hydraulic pump, a pressure reducing valve, a three-position four-way directional valve, a one-way hydraulic lock, a two-way hydraulic lock, a clamping cylinder, a pressure sensor, an instrument display, a controller, a self-resetting slide key, and a working device action switch. The three-position four-way directional valve is equipped with solenoid valves Y1 and Y2. The controller is electrically connected to the hydraulic pump, solenoid valves Y1 and Y2 in the three-position four-way directional valve, the pressure sensor, the instrument display, the self-resetting slide key, and the working device action switch. The hydraulic oil tank is connected to the hydraulic pump, the pressure reducing valve, the three-position four-way directional valve, the one-way hydraulic lock, the two-way hydraulic lock, and the clamping cylinder in sequence through hydraulic pipelines. The pressure sensor is used to detect the oil pressure at the outlet of the one-way hydraulic lock. The self-resetting slide key can slide to the left and right, and automatically returns to the middle position after being released. The clamping cylinder is used to control the operation of the tool's clamping nozzle.

[0007] Furthermore, the outlet of the hydraulic oil tank is connected in sequence via hydraulic pipelines to a hydraulic pump, a pressure reducing valve, an oil chamber controlled by solenoid valve Y1 in a three-position four-way directional valve, a one-way hydraulic lock, a two-way hydraulic lock, and the oil inlet of a clamping cylinder. The outlet of the clamping cylinder is connected in sequence via hydraulic pipelines to a two-way hydraulic lock, a one-way hydraulic lock, an oil chamber controlled by solenoid valve Y2 in a three-position four-way directional valve, a pressure reducing valve, and the oil inlet of the hydraulic oil tank.

[0008] A control method for a control system that improves the safety of pile driver construction includes:

[0009] The instrument display sets a certain number of working conditions on the page for the operator to select according to the actual situation. Each time the machine is powered on, a pop-up window appears on the instrument page to display the current working condition. The driver can select the working condition on the page according to the current working condition. After the selection is completed, the clamping pressure range information set for the working condition will be transmitted to the controller. When the driver does not select a working condition on the display, the working device will start and stop, and the next operation cannot be carried out.

[0010] The clamping control logic of the implement: When the self-reset slide key slides to the left, the controller receives the clamping signal, the solenoid valve Y2 on the three-position four-way directional valve is energized, the hydraulic pump supplies oil to the hydraulic system through the pressure reducing valve, and the pressurized oil supplies oil to the large chamber of the clamping cylinder through the one-way hydraulic lock and the two-way hydraulic lock, and the implement jaws begin to clamp; at the same time, the pressure sensor transmits the current pressure value c1 to the controller, the controller compares the pressure value c1 with the working condition pressure value set in the current instrument display, determines whether the pressure value c1 meets the current working condition requirements, and thus restricts whether the driver can perform the next operation;

[0011] The control logic for releasing the implement is as follows: After the self-reset slide key is slid to the right to its limit position, it automatically resets upon release. Timing begins from the first time the slide key reaches its limit position. Within t1 seconds, the slide key is slid to the right to its limit position a second time, and timing begins from the second time. After the self-reset slide key remains at its rightmost limit position for t2 seconds, the instrument display shows a warning that the implement clamp is about to release. Timing begins from the second time the slide key reaches its limit position. After the self-reset slide key remains at its rightmost limit position for t3 seconds, the controller receives a release signal. The solenoid valve Y1 on the three-position four-way directional valve is energized, and the hydraulic pump supplies oil to the hydraulic system through the pressure reducing valve. The pressurized oil is supplied to the small chamber of the clamping cylinder through the one-way and two-way hydraulic locks, and the implement clamp begins to release.

[0012] Furthermore, based on the information fed back by the controller, the instrument display can show a green safety icon with text indicating that the clamping is safe, a red danger icon with text indicating that the clamping pressure does not meet the current working conditions, and a yellow safety icon with text indicating that the tool's jaws are about to loosen.

[0013] Furthermore, the controller compares the pressure value c1 with the operating pressure value set in the current instrument display. Specifically: when the value meets the current operating requirements, the instrument display shows a green safety icon and text prompting "Safe clamping," and the driver can proceed with the next action. When the pressure value c1 does not meet the current operating requirements, the instrument display shows a red danger icon and text prompting "Clamping pressure does not meet the current operating requirements," and at the same time, the controller sends a shutdown signal to the working device's action switch, preventing the driver from proceeding with the next action.

[0014] Furthermore, when the instrument display is set to operating condition 1, and a1 < c1 < b1, where a1 and b1 are the upper and lower limits of the operating pressure value set in the instrument display, the controller determines that the current clamping pressure meets the working requirements. The instrument display shows a green safety icon and text prompting "Safe clamping," and the driver can proceed to the next action. When c1 < a1 or c1 > b1, the controller determines that the current clamping pressure value does not meet the operating requirements. The instrument display shows a red danger icon and text prompting "Clamping does not meet the current operating requirements," and at the same time, the controller sends a shutdown signal to the working device's action switch, preventing the driver from proceeding to the next action.

[0015] Furthermore, t1 is set to 2 seconds, t2 to 2 seconds, and t3 to 5 seconds. After the self-reset slider is slid to the right to its limit position, it is automatically reset upon release. Within 2 seconds, the self-reset slider is slid to the right to its limit position a second time. After the second self-reset slider remains at the rightmost limit position for 2 seconds, a yellow safety icon and text prompt are displayed on the instrument display. After the second self-reset slider remains at the rightmost limit position for 5 seconds, the controller receives a release signal, the solenoid valve Y1 on the three-position four-way directional valve is energized, the hydraulic pump supplies oil to the hydraulic system through the pressure reducing valve, and the pressurized oil supplies oil to the small chamber of the clamping cylinder through the one-way hydraulic lock and the two-way hydraulic lock. The tool jaws begin to loosen. If the above time logic requirements are not met, the loosening oil circuit is blocked, and the tool jaws remain clamped.

[0016] The beneficial effects of this invention are:

[0017] (1) By adding a pressure sensor to the clamping oil circuit and sending the clamping pressure to the controller, by adding judgment logic in the main controller, the clamping oil circuit status is displayed in the instrument, and at the same time, judgment logic is added to the loosening action in the controller, thereby reducing safety accidents caused by the driver's misoperation.

[0018] (2) This method can monitor the clamping pressure of the machine under different working conditions. When the working pressure is lower or higher than the set pressure, the instrument display will remind the driver of the current dangerous state and lock the operation of the working device to prevent accidents.

[0019] (3) This method requires the driver to operate the self-reset sliding key twice when releasing the pile, while also adding a time limit and a reminder on the instrument display interface, which greatly improves the safety of the whole machine operation. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the system principle of the present invention;

[0021] Figure 2 This is a flowchart of the control method of the present invention;

[0022] In the diagram: 1. Hydraulic oil tank; 2. Hydraulic pump; 3. Pressure reducing valve; 4. Three-position four-way directional valve; 5. One-way hydraulic lock; 6. Two-way hydraulic lock; 7. Clamping cylinder; 8. Pressure sensor; 9. Instrument display; 10. Controller; 11. Self-resetting slide key; 12. Working device action switch. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. However, it should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of the invention.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of this invention is for the purpose of describing particular embodiments only and is not intended to limit the invention.

[0025] like Figure 1 As shown, a control system for improving the construction safety of a pile driver includes: a hydraulic oil tank 1, a hydraulic pump 2, a pressure reducing valve 3, a three-position four-way directional valve 4, a one-way hydraulic lock 5, a two-way hydraulic lock 6, a clamping cylinder 7, a pressure sensor 8, an instrument display 9, a controller 10, a self-resetting slide key 11, and a working device action switch 12. The three-position four-way directional valve 4 is equipped with solenoid valves Y1 and Y2. The controller 10 is connected to the hydraulic pump 2 and the solenoid valves Y1 and Y2 in the three-position four-way directional valve 4. The pressure sensor 8, instrument display 9, self-resetting slide key 11, and working device action switch 12 are electrically connected. The hydraulic oil tank 1 is connected to the hydraulic pump 2, pressure reducing valve 3, three-position four-way reversing valve 4, one-way hydraulic lock 5, two-way hydraulic lock 6, and clamping cylinder 7 in sequence through hydraulic pipelines. The pressure sensor 8 is used to detect the oil pressure at the oil outlet of the one-way hydraulic lock 5. The self-resetting slide key 11 can slide to the left and right. After being released, the slide key will automatically return to the middle position. The clamping cylinder 7 is used to control the operation of the tool's clamping nozzle.

[0026] Pressure sensor 8 is located between the one-way hydraulic lock 5 and the two-way hydraulic lock 6 in the oil inlet circuit of the large chamber of clamping cylinder 7, and can transmit the pressure value of the oil inlet circuit to controller 10.

[0027] like Figure 2 As shown, a control method for a control system to improve the construction safety of a pile driver includes:

[0028] The instrument display 9 can set a certain number of working conditions on the page for the operator to select according to the actual situation. Each time the whole machine is powered on, a pop-up window appears on the instrument page, displaying the current working condition status. The driver can select the working condition on the page according to the current construction working condition. After the selection is completed, the clamping pressure range information set for the working condition will be transmitted to the controller 10. When the driver does not select a working condition on the display, the working device will start and stop, and the next operation cannot be carried out; for example, the clamping pressure range value of working condition 1 (less than a1 pressure, greater than b1 pressure), the clamping pressure range value of working condition 2 (less than a2 pressure, greater than b2 pressure), the clamping pressure range value of working condition 3 (less than a3 pressure, greater than b3 pressure)...

[0029] The instrument display 9 can display a green safety icon with text prompts (safe clamping), a red danger icon with text prompts (clamping pressure does not meet current operating conditions) and a yellow safety icon with text prompts (machine jaws are about to loosen) based on the information fed back by the controller 10. The text prompts (clamping pressure does not meet current operating conditions) can be further refined to include text prompts (pressure high or pressure low) to remind the operator of the specific problem that prevents operation.

[0030] The clamping control logic is as follows: When the self-resetting slide key 11 slides to the left, the controller 10 receives a clamping signal. The solenoid valve Y2 on the three-position four-way directional valve 4 is energized, and the hydraulic pump 2 supplies oil to the hydraulic system through the pressure reducing valve 3. The pressurized oil is supplied to the large chamber of the clamping cylinder 7 through the one-way hydraulic lock 5 and the two-way hydraulic lock 6, and the clamping jaws begin to clamp. At the same time, the pressure sensor 8 transmits the current pressure value c1 to the controller 10. The controller 10 compares the pressure value c1 with the working condition pressure value set in the current instrument display 9. When the pressure value c1 meets the current working condition requirements, the instrument display 9 shows a green safety icon and text prompt "Safe clamping," and the driver can proceed to the next step. When the pressure value c1 does not meet the current working condition requirements, the instrument display 9 shows a red danger icon. If the clamping pressure does not meet the current working condition requirements, the controller 10 will send a shut-off signal to the working device action switch 12, preventing the driver from performing the next action (for example, when the instrument display 9 is set to working condition 1, if a1 < c1 < b1, the controller 10 determines that the current clamping pressure meets the working requirements, and the instrument display 9 will display a green safety icon and a text prompt indicating safe clamping, allowing the driver to perform the next action; if c1 < a1 or c1 > b1, the controller 10 determines that the current clamping pressure does not meet the working condition requirements, and the instrument display 9 will display a red danger icon and a text prompt indicating that the clamping pressure does not meet the current working condition requirements, while the controller 10 will send a shut-off signal to the working device action switch 12, preventing the driver from performing the next action).

[0031] The control logic for releasing the tool is as follows: After the self-resetting slide key 11 slides to its rightmost position, it automatically resets upon release. Timing begins from the first time it slides to its rightmost position. Within t1 seconds, the self-resetting slide key 11 slides to its rightmost position a second time. Timing begins from the second time it slides to its rightmost position. After the self-resetting slide key 11 remains in its rightmost extreme position for t2 seconds, the instrument display 9 shows a yellow safety icon and text indicating that the tool clamp is about to release. Timing begins from the second time it slides to its rightmost position. After the self-resetting slide key 11 remains in its rightmost extreme position for t3 seconds, the controller 10 receives the release signal. The solenoid valve Y1 on the three-position four-way directional valve 4 is energized. The hydraulic pump 2 supplies oil to the hydraulic system through the pressure reducing valve 3. The pressurized oil is supplied to the small chamber of the clamping cylinder 7 through the one-way hydraulic lock 5 and the two-way hydraulic lock 6. The release begins (for example, t1 is set to 2 seconds, t2 to 2 seconds, and t3 to 5 seconds). After the self-reset slide key 11 is slid to the right to its limit position, the slide key is released and automatically resets. Within 2 seconds, the self-reset slide key 11 is slid to the right to its limit position a second time. After the self-reset slide key 11 remains at the rightmost limit position for 2 seconds, the instrument display 9 shows a yellow safety icon and text prompt. After the self-reset slide key 11 remains at the rightmost limit position for 5 seconds, the controller 10 receives the release signal. The solenoid valve Y1 on the three-position four-way directional valve 4 is energized. The hydraulic pump 2 supplies oil to the hydraulic system through the pressure reducing valve 3. The pressurized oil is supplied to the small chamber of the clamping cylinder 7 through the one-way hydraulic lock 5 and the two-way hydraulic lock 6. The tool jaws begin to release. If the above time logic requirements are not met, the release oil circuit is blocked, and the tool jaws remain clamped.

[0032] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions or improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A control system for improving the safety of a pile driver installation, characterised in that, include: The system includes a hydraulic oil tank, hydraulic pump, pressure reducing valve, three-position four-way directional valve, one-way hydraulic lock, two-way hydraulic lock, clamping cylinder, pressure sensor, instrument display, controller, self-resetting slide key, and working device action switch. The three-position four-way directional valve is equipped with solenoid valves Y1 and Y2. The controller is electrically connected to the hydraulic pump, solenoid valves Y1 and Y2 in the three-position four-way directional valve, pressure sensor, instrument display, self-resetting slide key, and working device action switch. The hydraulic oil tank is connected to the hydraulic pump, pressure reducing valve, three-position four-way directional valve, one-way hydraulic lock, two-way hydraulic lock, and clamping cylinder in sequence through hydraulic pipelines. The pressure sensor is used to detect the oil pressure at the outlet of the one-way hydraulic lock. The self-resetting slide key can slide left and right, and automatically returns to the middle position after being released. The clamping cylinder is used to control the operation of the tool's clamping nozzle.

2. The control system for improving the construction safety of a pile driver according to claim 1, characterized in that, The outlet of the hydraulic oil tank is connected in sequence via hydraulic pipelines to the hydraulic pump, pressure reducing valve, oil chamber controlled by solenoid valve Y1 in the three-position four-way directional valve, one-way hydraulic lock, two-way hydraulic lock, and the oil inlet of the clamping cylinder. The outlet of the hydraulic cylinder is connected in sequence via hydraulic pipelines to the two-way hydraulic lock, one-way hydraulic lock, oil chamber controlled by solenoid valve Y2 in the three-position four-way directional valve, pressure reducing valve, and the oil inlet of the hydraulic oil tank.

3. The control method for a control system for improving the construction safety of a pile driver according to claim 1, characterized in that, include: The instrument display sets a certain number of working conditions on the page for the operator to select according to the actual situation. Each time the machine is powered on, a pop-up window appears on the instrument page to display the current working condition. The driver can select the working condition on the page according to the current working condition. After the selection is completed, the clamping pressure range information set for the working condition will be transmitted to the controller. When the driver does not select a working condition on the display, the working device will start and stop, and the next operation cannot be carried out.

4. The control method for a control system for improving the construction safety of a pile driver according to claim 3, characterized in that, The clamping control logic of the implement: When the self-reset slide key slides to the left, the controller receives the clamping signal, the solenoid valve Y2 on the three-position four-way directional valve is energized, the hydraulic pump supplies oil to the hydraulic system through the pressure reducing valve, and the pressurized oil supplies oil to the large chamber of the clamping cylinder through the one-way hydraulic lock and the two-way hydraulic lock, and the implement jaws begin to clamp; at the same time, the pressure sensor transmits the current pressure value c1 to the controller, the controller compares the pressure value c1 with the working condition pressure value set in the current instrument display, determines whether the pressure value c1 meets the current working condition requirements, and thus restricts whether the driver can perform the next operation.

5. The control method for a control system for improving the construction safety of a pile driver according to claim 3, characterized in that, The control logic for releasing the implement is as follows: After the self-reset slide key is slid to the right to its limit position, it automatically resets upon release. Timing begins from the first time the slide key reaches its limit position. Within t1 seconds, the slide key is slid to the right to its limit position a second time, and timing begins from the second time. After the self-reset slide key remains at its rightmost limit position for t2 seconds, the instrument display shows a warning that the implement clamp is about to release. Timing begins from the second time the slide key reaches its limit position. After the self-reset slide key remains at its rightmost limit position for t3 seconds, the controller receives a release signal. The solenoid valve Y1 on the three-position four-way directional valve is energized, and the hydraulic pump supplies oil to the hydraulic system through the pressure reducing valve. The pressurized oil is supplied to the small chamber of the clamping cylinder through the one-way and two-way hydraulic locks, and the implement clamp begins to release.

6. The control method for a control system for improving the construction safety of a pile driver according to claim 4, characterized in that, The instrument display shows a green safety icon with text indicating safe clamping, a red danger icon with text indicating that the clamping pressure does not meet the current working conditions, and a yellow safety icon with text indicating that the tool's jaws are about to loosen, based on information fed back from the controller.

7. The control method for a control system for improving the construction safety of a pile driver according to claim 6, characterized in that, The controller compares the pressure value c1 with the operating pressure value set in the instrument display. Specifically: when the value meets the current operating requirements, the instrument display shows a green safety icon and text prompting "Safe clamping," and the driver can proceed to the next step. When the pressure value c1 does not meet the current operating requirements, the instrument display shows a red danger icon and text prompting "Clamping pressure does not meet the current operating requirements," and at the same time, the controller sends a shutdown signal to the working device's action switch, preventing the driver from proceeding to the next step.

8. The control method for a control system for improving the construction safety of a pile driver according to claim 7, characterized in that, When the instrument display is set to operating condition 1, and a1 < c1 < b1, where a1 and b1 are the upper and lower limits of the operating pressure value set in the instrument display, the controller determines that the current clamping pressure meets the working requirements. The instrument display shows a green safety icon and text prompting "Safe clamping," and the driver can proceed to the next action. When c1 < a1 or c1 > b1, the controller determines that the current clamping pressure value does not meet the operating requirements. The instrument display shows a red danger icon and text prompting "Clamping pressure does not meet the operating requirements," and at the same time, the controller sends a shutdown signal to the working device's action switch, preventing the driver from proceeding to the next action.

9. The control method for a control system for improving the construction safety of a pile driver according to claim 6, characterized in that, The time settings are t1 (2 seconds), t2 (2 seconds), and t3 (5 seconds). After the self-reset slider is slid to the right to its limit position, it automatically resets upon release. Within 2 seconds, the self-reset slider is slid to the right to its limit position a second time. After the second self-reset slider remains at the rightmost limit position for 2 seconds, a yellow safety icon and text warning appear on the instrument display. After the second self-reset slider remains at the rightmost limit position for 5 seconds, the controller receives a release signal. The solenoid valve Y1 on the three-position four-way directional valve is energized, and the hydraulic pump supplies oil to the hydraulic system through the pressure reducing valve. The pressurized oil supplies oil to the small chamber of the clamping cylinder through the one-way hydraulic lock and the two-way hydraulic lock, and the tool jaws begin to loosen. If the tool jaws do not meet the loosening requirements, the loosening oil circuit is blocked, and the tool jaws remain clamped.

Images