Core drilling rig hoisting safety protection system

Abstract

The utility model discloses a core drilling rig safety protection system of drawing drill pipe, including control circuit and hydraulic circuit, control circuit includes controller, and with its signal connection's position detection device, electromagnetic reversing valve, position detection device is located on the drilling rig mast, and it detects whether the top of drill pipe reaches the preset safety position, hydraulic circuit includes the hydraulic oil tank, pump, manual valve, check valve, main winch motor that pipeline connection is followed, and main winch motor is associated with brake, manual valve controls hydraulic oil flow direction and drives main winch motor forward or reverse or stop, electromagnetic reversing valve is connected in parallel with check valve, and electromagnetic reversing valve is controlled in controller, and on-off main winch motor forward drive oil circuit, and brake brakes when main winch motor drive oil circuit is cut off. This core drilling rig safety protection system of drawing drill pipe combines the traditional craft of drawing drill pipe of multiple rods, and through data acquisition, electromechanical fluid comprehensive control, carries out safety protection to the drawing drill pipe process of multiple rods, realizes the efficient, safe core drilling rig of drilling in and taking core.

Description

Technical Field

[0001] This utility model relates to the technical field of geological core drilling equipment, specifically a core drilling rig lifting safety protection system. Background Technology

[0002] Geological core drilling refers to the technique of directly obtaining underground physical information by drilling and coring strata at a certain depth.

[0003] Drilling typically involves connecting multiple drill rods. Specifically, in deep-hole drilling (targeting formations of 1000-3000m), the number of drill rods is large, and each retrieval and descent consumes a significant amount of time. To improve drilling efficiency, reducing the auxiliary time for retrieval and descent is the most effective measure. Currently, the traditional construction process uses a main winch to pull multiple (3 or more) drill rods at a time via pulley blocks. This method can significantly reduce retrieval and descent time.

[0004] However, this increased mast height makes it difficult for operators to accurately observe the distance between the top of the high-speed drill pipe and the pulley block, increasing the risk of collision between the drill pipe top and the pulley block. Furthermore, to meet the requirements for deep-hole drill pipe hauling capacity, the main winch has a lifting force exceeding 100kN. In the event of an accidental collision, this will generate a significant impact force, potentially leading to serious safety accidents such as drill pipe falling or mast tipping.

[0005] Therefore, the aforementioned technical problems need to be solved. Utility Model Content

[0006] This utility model addresses the above-mentioned technical problems by providing a core drilling rig lifting safety protection system. Combining the traditional process of multi-rod lifting construction with automation technology, it uses data acquisition and electromechanical-hydraulic integrated control techniques to provide safety protection for the multi-rod lifting process, thereby enabling the core drilling rig to drill and obtain cores efficiently and safely.

[0007] To achieve the above objectives, the technical solution of this utility model is as follows:

[0008] A core drilling rig hoisting safety protection system includes a control circuit and a hydraulic circuit;

[0009] The control circuit includes a controller, a position detection device and an electromagnetic reversing valve connected to the controller; the position detection device is installed on the drilling rig mast, which detects whether the top of the drill rod has reached a preset safe position and sends a signal to the controller;

[0010] The hydraulic circuit includes a hydraulic oil tank, a pump, a manual valve, a check valve, and a main winch motor connected in sequence by pipelines. The main winch motor is associated with a brake.

[0011] The manual valve controls the flow of hydraulic oil to drive the main winch motor to rotate forward, stop, or reverse.

[0012] The electromagnetic reversing valve is connected in parallel with the check valve; the electromagnetic reversing valve is controlled by the controller to switch on and off the forward drive oil circuit of the main hoist motor.

[0013] The brake applies braking when the drive oil circuit of the main winch motor is cut off.

[0014] The manual valve of the core drilling rig's hoisting safety protection system controls the main winch motor to rotate forward and drive the drill rod to rise. During the drill rod lifting process, the position detection device on the drilling rig mast monitors whether the top of the drill rod has reached the preset safe position and sends a position signal to the controller. The controller controls the electromagnetic reversing valve to cut off the forward rotation drive oil circuit of the main winch motor according to the signal, and at the same time, the brake applies the brake, and the drill rod stops rising.

[0015] The manual valve switches the hydraulic oil to flow in the reverse direction, the check valve is activated, and the main winch motor reverses to drive the drill pipe down to the required safe position. The position detection device is reset and sends a signal back to the controller. The controller receives the signal and controls the solenoid directional valve to connect the oil circuit, waiting to provide safety protection for the next drilling operation.

[0016] The core drilling rig's safety protection system monitors the position of the top of the drill rod in real time through a position detection device installed on the mast. When the drill rod approaches the pulley block, the system can automatically and quickly cut off the hydraulic power and brake the main winch, effectively preventing the drill rod from colliding with the pulley block. This significantly improves the safety and automation level of the drilling operation while ensuring drilling efficiency.

[0017] In a further optimized solution, the position detection device is a limit switch or a proximity switch.

[0018] In a further optimized design, the control circuit also includes a brake sensor, which is located in the hydraulic circuit of the brake and its signal output terminal is connected to the signal input terminal of the controller to detect the working status of the brake.

[0019] Brake sensors monitor the working status of the brakes, making the system more intelligent and intuitive.

[0020] To further optimize the design, the control circuit also includes a display screen connected to the controller, used to display warning information and the status of the main hoist. The display screen enhances human-machine interaction, improving the system's usability and completeness.

[0021] The scheme is further optimized solenoid directional valve, which is a two-position three-way solenoid directional valve.

[0022] In a further optimized design, the components of the control circuit are connected via a CAN bus. Using a CAN bus to connect the components facilitates installation and use, improving the system's sophistication and reliability.

[0023] A further optimized design incorporates a normally closed brake that automatically brakes when there is no pressure or insufficient pressure in the drive oil circuit of the main winch motor. This normally closed brake automatically engages when the system experiences a power outage or malfunction, significantly enhancing safety.

[0024] Compared with the prior art, the core drilling rig hoisting safety protection system of this utility model has the following technical advantages:

[0025] 1. Effectively prevents collision accidents and ensures safety: Through the linkage between the position detection device and the electro-hydraulic system, the system can automatically cut off the power and brake before the top of the drill rod reaches the preset dangerous position, fundamentally avoiding rigid collisions between the drill rod and the pulley block, and completely eliminating the major safety hazards such as drill rod falling and mast tipping caused by this.

[0026] 2. Improved drilling efficiency and ensured efficient continuous operation: While achieving safety protection, the system inherits the high efficiency advantages of the "multi-rod drilling" process. By replacing manual observation and emergency operation with automated protection, it reduces the time wasted due to excessive safety margins or frequent start-stop operations caused by concerns about collisions. Thus, it maximizes the efficiency of deep hole drilling operations while ensuring safety.

[0027] 3. Enhanced intelligence and reduced operational burden and human error: The system integrates sensing, control and display functions, transforming the traditional vague operation that relies on the operator's visual observation and experience into a precise and automated control process; significantly reducing the labor intensity of operators and accidents caused by misjudgment.

[0028] 4. Improved system reliability and fail-safe mode: The system uses a combination of hydraulic and electronic control, and the brake is typically designed to be normally closed. Even in the event of an external power outage or system failure, the brake can automatically activate, reliably stopping the drill pipe in its original position, achieving "fail-safe" operation and providing double insurance for drilling operations. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the control circuit principle of a specific embodiment of the core drilling rig hoisting safety protection system of this utility model;

[0030] Figure 2 yes Figure 1 Schematic diagram of the hydraulic circuit principle of the embodiment;

[0031] Figure 3 yes Figure 1Flowchart of the control method during the operation of the embodiment.

[0032] In the diagram: 1. Hydraulic oil tank; 2. Pump; 3. Manual valve; 4. Check valve; 5. Solenoid directional valve; 6. Main winch motor; 7. Brake. Detailed Implementation

[0033] The present invention will now be described in further detail with reference to the embodiments shown in the accompanying drawings.

[0034] like Figures 1 to 3 As shown, this invention provides a specific embodiment of the core drilling rig lifting safety protection system.

[0035] like Figure 1 and Figure 2 As shown, the core drilling rig lifting safety protection system of this embodiment includes a control circuit and a hydraulic circuit.

[0036] The control circuit includes a controller, a position detection device connected to the controller via a signal, and a solenoid directional valve 5. The position detection device is mounted on the drilling rig mast and detects whether the top of the drill pipe has reached a preset safe position and sends a signal to the controller. The position detection device is a limit switch, and the solenoid directional valve 5 is a two-position three-way solenoid directional valve. The control circuit also includes a 24V battery, which powers the entire system.

[0037] The hydraulic circuit includes a hydraulic oil tank 1, a pump 2, a manual valve 3, a check valve 4, and a main winch motor 6 connected in sequence by pipelines. The main winch motor 6 is associated with a brake 7. The hydraulic oil tank 1 stores hydraulic oil, and the pump 2 provides hydraulic power. The manual valve 3 controls the flow of hydraulic oil to drive the main winch motor 6 to rotate forward, stop, or reverse. The solenoid directional valve 5 is connected in parallel with the check valve 4. The solenoid directional valve 5 is controlled by a controller to open and close the forward drive oil circuit of the main winch motor 6. The brake 7 applies braking when the drive oil circuit of the main winch motor 6 is cut off.

[0038] Brake 7 is a normally closed brake that automatically brakes when there is no pressure or insufficient pressure in the drive oil circuit of the main winch motor 6. The normally closed brake can automatically brake when the system loses power or malfunctions, which greatly improves safety.

[0039] The manual valve 3 of the core drilling rig's hoisting safety protection system controls the main winch motor 6 to rotate forward and drive the drill rod to lift. During the drill rod lifting process, a limit switch at a preset safety position on the drilling rig mast detects whether the top of the drill rod has reached the target position and sends a position signal to the controller. Based on this signal, the controller controls the solenoid reversing valve 5 to cut off the forward rotation drive oil circuit of the main winch motor 6, and at the same time, the brake 7 applies the brake, stopping the drill rod from rising.

[0040] Manual valve 3 switches the hydraulic oil to flow in the reverse direction, check valve 4 is opened, and main winch motor 6 reverses to drive the drill pipe down to the required safe position; limit switch is reset and feeds the signal back to controller, controller receives the signal and controls solenoid directional valve 5 to connect the oil circuit, waiting to provide safety protection when drilling is lifted again.

[0041] The core drilling rig's safety protection system monitors the top position of the drill rod in real time through a limit switch installed on the mast. When the drill rod approaches the pulley block, the system can automatically and quickly cut off the hydraulic power and brake the main winch, effectively preventing the drill rod from colliding with the pulley block. This significantly improves the safety and automation level of the drilling operation while ensuring drilling efficiency.

[0042] like Figure 1 As shown, the control circuit also includes a brake sensor, which is installed in the hydraulic circuit of the brake 7. Its signal output terminal is connected to the signal input terminal of the controller to detect the operating status of the brake 7. The brake sensor monitors the operating status of the brake 7, making the system more intelligent and intuitive.

[0043] like Figure 1 As shown, the control circuit also includes a display screen, which is connected to the controller and used to display warning information and the status of the main hoist. The display screen enhances human-machine interaction and improves the system's usability and completeness.

[0044] like Figure 1 As shown, the components in the control circuit are connected via a CAN bus. Using a CAN bus to connect the components in the control circuit facilitates installation and use, improving the system's sophistication and reliability.

[0045] like Figure 3 As shown, the working process of the core drilling rig hoisting safety protection system in this embodiment is as follows:

[0046] S1. Start by placing the manual valve 3 in the "up" position, opening the main winch brake 7, and rotating the main winch motor 6 forward to lift the drill rod through the pulley block.

[0047] S2. The top of the drill pipe touches the limit switch contact, and the contact action triggers the "drill pipe in position" signal;

[0048] S3. The controller receives the "drill rod in place" signal and displays an alarm on the screen, and controls the electromagnetic reversing valve 5 to cut off the forward rotation drive oil circuit of the main winch motor 6.

[0049] S4. The forward rotation oil circuit of the main winch motor 6 is cut off, stopping its rotation. At the same time, the brake 7 is activated, and the brake sensor triggers the "main winch brake" signal, which is displayed on the screen.

[0050] S5. The drill pipe stops rising and stabilizes at its original height position under the action of brake 7;

[0051] S6. Set the manual valve 3 to the "down" position, reverse the oil inlet and outlet circuits, and connect the check valve 4 connected in parallel with the solenoid directional valve 5. The display screen shows "Main winch brake released", the main winch motor 6 reverses, and the drill rod descends to the required safe position.

[0052] S7. The drill pipe descends, resetting the limit switch contacts and triggering a "normal" signal. The controller receives the signal and controls the solenoid directional valve 5 to connect the oil circuit, restoring the system to its initial state and providing safety protection for the next drilling operation.

[0053] This core drilling rig hoisting safety protection system combines the traditional process of multi-rod hoisting construction with automation technology. Through data acquisition and electromechanical-hydraulic integrated control, it provides safety protection for the multi-rod hoisting process, thereby enabling the core drilling rig to drill and obtain cores efficiently and safely.

[0054] In summary, as described in the specification and figures, this utility model has been manufactured into actual samples and subjected to multiple use tests. The test results demonstrate that this utility model achieves its intended purpose, and its practicality is beyond doubt. The embodiments described above are merely for illustrative purposes and are not intended to limit the scope of this utility model. Any equivalent embodiments made by those with common knowledge in the relevant technical field, utilizing the technical content disclosed in this utility model, without departing from the scope of the technical features and similar features disclosed in this utility model, are all within the protection scope of this utility model.

Claims

1. A safety protection system for core drilling rig hoisting, characterized in that: Including control circuits and hydraulic circuits; The control circuit includes a controller, a position detection device connected to the controller, and an electromagnetic reversing valve (5); the position detection device is installed on the drilling rig mast, which detects whether the top of the drill rod has reached a preset safe position and sends a signal to the controller; The hydraulic circuit includes a hydraulic oil tank (1), a pump (2), a manual valve (3), a check valve (4), and a main winch motor (6) connected in sequence by pipelines. The main winch motor (6) is associated with a brake (7). The manual valve (3) controls the flow of hydraulic oil to drive the main winch motor (6) to rotate forward, stop, or reverse. The electromagnetic reversing valve (5) is connected in parallel with the check valve (4); the electromagnetic reversing valve (5) is controlled by the controller to open and close the forward rotation drive oil circuit of the main hoist motor (6); The brake (7) applies braking when the drive oil circuit of the main winch motor (6) is cut off.

2. The core drilling rig hoisting safety protection system according to claim 1, characterized in that, The position detection device is a limit switch or a proximity switch.

3. The core drilling rig hoisting safety protection system according to claim 1, characterized in that, The control circuit also includes a brake sensor, which is installed on the oil circuit of the brake (7) and its signal output terminal is connected to the signal input terminal of the controller to detect the working status of the brake (7).

4. The core drilling rig hoisting safety protection system according to claim 1, characterized in that, The control circuit also includes a display screen, which is connected to the controller and is used to display warning information and the status of the main hoist.

5. The core drilling rig hoisting safety protection system according to claim 1, characterized in that, The solenoid directional valve (5) is a two-position three-way solenoid directional valve.

6. The core drilling rig hoisting safety protection system according to claim 1, characterized in that, The components in the control circuit are connected via a CAN bus.

7. The core drilling rig hoisting safety protection system according to any one of claims 1 to 6, characterized in that, The brake (7) is a normally closed brake that automatically brakes when there is no pressure or insufficient pressure in the drive oil circuit of the main hoist motor.

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