An automatic start-stop control system for mud of a trenchless horizontal directional drilling rig

Abstract

The present invention discloses a non-excavation horizontal directional drilling rig mud automatic start-stop control system, which relates to the technical field of the drilling rig mud automatic start-stop control system, and solves the problems of high construction cost, high energy consumption and low efficiency of the traditional drilling rig directly driven by a diesel engine. The system includes a mud hydraulic valve, a mud pump, a mud sensor, a gripper cylinder, a gripper cylinder pressure sensor, a gripper cylinder control valve, a rotation control system and a rotary motor. The mud pump is fixedly connected to the mud hydraulic valve, the mud hydraulic valve is linearly connected to the mud sensor, the gripper cylinder is fixedly connected to the gripper cylinder control valve, and the gripper cylinder control valve is linearly connected to the gripper cylinder pressure sensor, reducing the personal injury of the construction workers during the rod unloading process due to forgetting to close the mud, avoiding construction risks caused by forgetting to open the mud, and reducing mud loss caused by forgetting to close the mud to save construction costs.

Description

Technical Field

[0001] The present invention relates to the technical field of an automatic start-stop control system for drilling rig mud, and specifically to an automatic start-stop control system for non-excavation horizontal directional drilling rig mud. Background Art

[0002] Currently, the start and stop of non-excavation horizontal directional drilling rig mud are both manually controlled by switches. During actual construction, it often happens that the driller forgets to turn on the mud switch at the start of drilling, resulting in engineering accidents such as sintering of the guide bit due to lack of lubrication during the guiding process of the horizontal directional drilling rig, sticking of the drill during the reaming process due to lack of lubrication and support, collapse of the borehole, etc.; during the loading and unloading of drill pipes, if the driller forgets to turn off the mud, the mud will spray irregularly after the drill pipe is uncoupled, which not only wastes resources but may even cause harm to the surrounding construction workers. All of the above are potential hazards caused by manually operating the mud switch, which not only brings economic losses to the constructors, but may even cause personal injuries to the constructors, and will increase costs and reduce the personal safety of the constructors due to the construction risks caused by the start and stop of the mud. Summary of the Invention

[0003] In view of the deficiencies of the prior art, the present invention provides an automatic start-stop control system for non-excavation horizontal directional drilling rig mud, which solves the problems of high construction cost, high energy consumption, and low efficiency of traditional drilling rigs directly driven by diesel engines.

[0004] To achieve the above objectives, the present invention is realized through the following technical solutions: An automatic start-stop control system for non-excavation horizontal directional drilling rig mud, including a mud hydraulic valve, a mud pump, a mud sensor, a gripper cylinder, a gripper cylinder pressure sensor, a gripper cylinder control valve, a rotation control system, and a rotary motor. The mud pump is fixedly connected to the mud hydraulic valve, the mud hydraulic valve is linearly connected to the mud sensor, the gripper cylinder is fixedly connected to the gripper cylinder control valve, and the gripper cylinder control valve is linearly connected to the gripper cylinder pressure sensor. The rotation control system is linearly connected to the rotary motor, and an LC controller is provided inside the drilling rig.

[0005] The mud pump provides mud for the non-excavation horizontal directional drilling rig. The gripper cylinder is used to cooperate with the power head to complete the loading and unloading of drill pipes. The gripper cylinder control valve is used to control the clamping and loosening of the gripper cylinder. The mud hydraulic valve controls the opening and closing of the mud pump. The gripper cylinder pressure sensor feeds back the pressure signal of the gripper cylinder. The mud sensor is a pressure sensor and is used to feed back the mud pressure signal. And the PLC controller receives the feedback signal and issues a control signal. The rotation control system is used to control the forward and reverse rotation of the rotary motor.

[0006] Preferably, the clamping cylinder pressure sensor is installed on the pressure oil circuit of the gripper cylinder, and detects and outputs a pressure signal when the gripper cylinder clamps and releases. When the gripper cylinder releases, the clamping cylinder pressure sensor detects the pressure of the gripper cylinder and feeds it back to the PLC controller, and the PLC controller compares the received pressure feedback from the clamping cylinder pressure sensor with the set clamping pressure of the PLC controller, so as to facilitate the protection of the use of the mud pump.

[0007] Preferably, the mud sensor is installed on the mud pressure port of the mud pump, and detects and outputs a mud pressure signal. When the feedback force of the mud sensor is greater than or less than the mud pressure set by the PLC controller, the PLC controller determines whether there is an alarm signal to judge the abnormality of the mud pump, so as to facilitate the detection of the working state of the mud pump.

[0008] Preferably, the rotation control system controls the forward and reverse rotation of the rotary motor and feeds back the output control signal to the PLC controller. When the rotary motor rotates forward, the PLC controller automatically starts the program of the mud pump according to the magnitude of the pressure feedback from the clamping cylinder pressure sensor, so as to facilitate the operation of the mud pump.

[0009] Preferably, the pressure signals fed back by the clamping cylinder pressure sensor and the mud sensor are received by the PLC controller, and the received signals are processed according to the set clamping cylinder pressure and mud pressure of the PLC controller, and corresponding control signals are sent according to the set program, so as to facilitate the control of the mud pump and the clamping cylinder.

[0010] Preferably, a filter is added to the input port of the PLC controller connected to the mud pump, and the input signal is programmed by the PLC to perform software filtering processing on the input signal, so as to be able to remove high-frequency noise and enable the filter to achieve average value filtering and median filtering.

[0011] Preferably, the signal lines of the PLC controller connected to the mud pump are laid separately, and the signals are transmitted through shielded cables, so as to avoid parallel wiring, reduce electromagnetic induction interference and shield external electromagnetic interference.

[0012] Preferably, an alarm is fixedly installed on the PLC controller connected to the mud pump, and is used to alarm when the start or stop of the mud pump is abnormal, so as to be able to conveniently remind the staff and enable the staff to perform timely maintenance on it.

[0013] The present invention provides a non-excavation horizontal directional drilling rig mud automatic start-stop control system. It has the following beneficial effects:

[0014] 1. The automatic start-stop control system for the mud of a trenchless horizontal directional drilling rig reduces the personal injury of construction workers during the construction process due to forgetting to turn off the mud during the rod unloading process when using the automatic start-stop control system for the mud of a trenchless horizontal directional drilling rig.

[0015] 2. The automatic start-stop control system for the mud of a trenchless horizontal directional drilling rig avoids construction risks caused by forgetting to turn on the mud when using the automatic start-stop control system for the mud of a trenchless horizontal directional drilling rig.

[0016] 3. The automatic start-stop control system for the mud of a trenchless horizontal directional drilling rig reduces the loss of mud caused by forgetting to turn off the mud and saves construction costs when using the automatic start-stop control system for the mud of a trenchless horizontal directional drilling rig. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a control framework diagram of the pressure principle of the present invention;

[0018] Figure 2 It is a driving framework diagram of the automatic closing of the mud of the present invention;

[0019] Figure 3 It is a driving framework diagram of the automatic start of the mud of the present invention.

[0020] In the figure, 1 - mud hydraulic valve, 2 - mud pump, 3 - mud sensor, 4 - gripper cylinder, 5 - gripper cylinder pressure sensor, 6 - gripper cylinder control valve, 7 - rotation control system, 8 - rotation motor. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention. Embodiment 1

[0022] Please refer to Figures 1-3 , the embodiment of the present invention provides an automatic start-stop control system for the mud of a trenchless horizontal directional drilling rig, including a mud hydraulic valve 1, a mud pump 2, a mud sensor 3, a gripper cylinder 4, a gripper cylinder pressure sensor 5, a gripper cylinder control valve 6, a rotation control system 7 and a rotation motor 8. The mud pump 2 is fixedly connected to the mud hydraulic valve 1, the mud hydraulic valve 1 is linearly connected to the mud sensor 3, the gripper cylinder 4 is fixedly connected to the gripper cylinder control valve 6, and the gripper cylinder control valve 6 is linearly connected to the gripper cylinder pressure sensor 5. The rotation control system 7 is linearly connected to the rotation motor 8, and an LC controller is provided inside the drilling rig;

[0023] The mud pump 2 supplies mud for the trenchless horizontal directional drill. The gripper cylinder 4 is used to cooperate with the power head to complete the loading and unloading of drill pipes. The gripper cylinder control valve 6 is used to control the clamping and loosening of the gripper cylinder. The mud hydraulic valve 1 controls the opening and closing of the mud pump 2. The gripper cylinder pressure sensor 5 feeds back the pressure signal of the gripper cylinder. The mud sensor 3 is a pressure sensor and is used to feed back the mud pressure signal. And the PLC controller receives the feedback signal and issues a control signal. The rotation control system 7 is used to control the forward and reverse rotation of the rotary motor. By the pressure value of the pressure sensor set by the PLC controller for the gripper cylinder pressure sensor 5, when the pressure value of the gripper cylinder pressure sensor 5 is greater than or less than the set pressure value, the start and stop of the mud pump 2 can be controlled. Embodiment 2

[0024] In order to facilitate the detection and judgment of the abnormality of the start and stop of the mud pump 2, in this embodiment, as Figures 2-3 shown, the gripper cylinder pressure sensor 5 is installed on the pressure oil circuit of the gripper cylinder 4, and detects and outputs a pressure signal when the gripper cylinder 4 clamps and loosens. When the gripper cylinder 4 loosens, the gripper cylinder pressure sensor 5 detects the pressure of the gripper cylinder 4 and feeds it back to the PLC controller. And the PLC controller compares the received pressure fed back by the gripper cylinder pressure sensor 5 with the set clamping pressure of the PLC controller. The mud sensor 3 is installed on the mud pressure port of the mud pump 2 and detects and outputs a mud pressure signal. When the feedback force of the mud sensor 3 is greater than or less than the mud pressure set by the PLC controller, and by whether the PLC controller issues an alarm signal to judge the abnormality of the mud pump 2, the automatic shutdown program of the mud pump 2 is started. The PLC controller outputs a control signal, and the mud hydraulic valve 1DT3 loses power, and the mud pump 2 shuts down. At this time, the mud sensor 3 feeds back the mud pressure signal. When the pressure fed back by the mud sensor 3 is less than or equal to the mud pressure set by the PLC controller, the mud pump 2 is shut down completely; when the pressure fed back by the mud sensor 3 is greater than the mud pressure set by the PLC controller, the shutdown of the mud pump 2 is abnormal. Repeat the power failure of the mud hydraulic valve 1DT3. If the pressure fed back by the mud sensor 3 is still greater than the mud pressure set by the PLC controller, the PLC controller issues an alarm signal, and the drill operator needs to manually check the abnormality. Embodiment

[0025] In order to facilitate the normal start of the mud pump 2, in this embodiment, as Figures 1-3As shown, the rotation control system 7 controls the forward and reverse rotation of the rotation motor 8, feeds back the output control signal to the PLC controller. When the rotation motor 8 rotates forward, the PLC controller starts the automatic start program of the mud pump 2 according to the magnitude of the feedback pressure of the clamping oil cylinder pressure sensor 5. The PLC controller outputs a control signal, and the mud hydraulic valve 1DT3 is energized, and the mud pump 2 starts. At this time, the mud sensor 3 feeds back the mud pressure signal. When the feedback pressure of the mud sensor 3 is greater than or equal to the set mud pressure of the PLC controller, the mud pump 2 has completed starting. Embodiment 3

[0026] To prevent the PLC from being interfered with when receiving signals. In this embodiment, as Figures 1-3 shown, the pressure signals fed back by the clamping oil cylinder pressure sensor 5 and the mud sensor 3 are received by the PLC controller, and the received signals are processed according to the set clamping cylinder pressure and mud pressure of the PLC controller, and corresponding control signals are sent according to the set program. The PLC controller connected to the mud pump 2 is added with a filter at the input port, and the input signal is programmed by the PLC to perform software filtering processing. The signal wires of the PLC controller connected to the mud pump 2 are laid separately and the signals are transmitted through shielded cables. An alarm is fixedly installed on the PLC controller connected to the mud pump 2 and is used to alarm when the start or stop of the mud pump 2 is abnormal. The start of the mud pump 2 requires that the release pressure of the clamping cylinder 4 is greater than or equal to the set pressure of the PLC controller and the rotation control system 7DT5 is energized to make it rotate forward.

[0027] It should be noted that in this embodiment, when using the non-excavation horizontal directional drilling mud automatic start-stop control system, as Figure TwoAs shown in the figure, for the electrical topology diagram of the automatic shutdown of the mud pump 2, the clamping cylinder control valve 6DT2 is energized, the clamping cylinder 4 clamps, the gripper pressure sensor 5 detects the pressure of the clamping cylinder 4 and feeds it back to the PLC controller. The PLC controller compares the feedback pressure received from the clamping cylinder pressure sensor 5 with the set clamping pressure of the PLC controller. When the feedback pressure from the clamping cylinder pressure sensor 5 is less than the set clamping pressure of the PLC controller, the automatic shutdown program of the mud pump 2 does not start; when the feedback pressure from the clamping cylinder pressure sensor 5 is greater than or equal to the set clamping pressure of the PLC controller, the automatic shutdown program of the mud pump 2 starts. The PLC controller outputs a control signal, and the mud hydraulic valve 1DT3 is de-energized, and the mud pump 2 shuts down. At this time, the mud sensor 3 feeds back a mud pressure signal. When the feedback pressure from the mud sensor 3 is less than or equal to the set mud pressure of the PLC controller, the mud pump 2 shuts down completely; when the feedback pressure from the mud sensor 3 is greater than the set mud pressure of the PLC controller, the shutdown of the mud pump 2 is abnormal. The de-energization of the mud hydraulic valve 1DT3 is repeated. If the feedback pressure from the mud sensor 3 is still greater than the set mud pressure of the PLC controller, the PLC controller issues an alarm signal, and the drill operator needs to manually check for abnormalities.

[0028] As Figure Three As shown in the figure, for the electrical topology diagram of the automatic startup of the mud pump 2, the automatic startup of the mud pump 2 meets two conditions: ①. The release pressure of the clamping cylinder 4 is greater than or equal to the set pressure of the PLC controller; ②. The rotation control system DT5 is energized and rotates forward. If either condition is not met, the mud pump 2 cannot be automatically started.

[0029] The clamping cylinder control valve 6DT1 is energized, the clamping cylinder 4 releases, the gripper pressure sensor 5 detects the pressure of the clamping cylinder 4 and feeds it back to the PLC controller. The PLC controller compares the feedback pressure received from the clamping cylinder pressure sensor 5 with the set clamping pressure of the PLC controller. When the feedback pressure from the clamping cylinder pressure sensor 5 is less than the set clamping pressure of the PLC controller, the automatic startup program of the mud pump 2 does not start; when the feedback pressure from the clamping cylinder pressure sensor 5 is greater than or equal to the set clamping pressure of the PLC controller and the rotation control system 7DT5 sends a signal and the rotation motor 8 rotates forward, and the PLC controller receives the signal and meets the above two conditions, the automatic startup program of the mud pump 2 starts. The PLC controller outputs a control signal, and the mud hydraulic valve 1DT3 is energized, and the mud pump 2 starts. At this time, the mud sensor 3 feeds back a mud pressure signal. When the feedback pressure from the mud sensor 3 is greater than or equal to the set mud pressure of the PLC controller, the mud pump 2 starts up completely; when the feedback pressure from the mud sensor 3 is less than the set mud pressure of the PLC controller, the startup of the mud pump 2 is abnormal. The energization of the mud hydraulic valve 1DT3 is repeated. If the feedback pressure from the mud sensor 3 is still less than the set mud pressure of the PLC controller, the PLC controller issues an alarm signal, and the drill operator needs to manually check for abnormalities.

[0030] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-described exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced by the present invention. Any reference signs in the claims should not be construed as limiting the claims involved.

[0031] In addition, it should be understood that although this specification is described in terms of embodiments, not every embodiment only contains an independent technical solution. This narrative manner of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An automatic start-stop control system for the mud of a trenchless horizontal directional drilling rig, characterized in that: It includes a mud hydraulic valve (1), a mud pump (2), a mud sensor (3), a gripper cylinder (4), a gripper cylinder pressure sensor (5), a gripper cylinder control valve (6), a rotation control system (7) and a rotation motor (8). The mud pump (2) is fixedly connected to the mud hydraulic valve (1). The mud hydraulic valve (1) is linearly connected to the mud sensor (3). The gripper cylinder (4) is fixedly connected to the gripper cylinder control valve (6), and the gripper cylinder control valve (6) is linearly connected to the gripper cylinder pressure sensor (5). The rotation control system (7) is linearly connected to the rotation motor (8), and an LC controller is provided inside the drilling rig. The mud pump (2) supplies mud for the trenchless horizontal directional drilling rig. The gripper cylinder (4) is used to cooperate with the power head to complete the loading and unloading of drill pipes. The gripper cylinder control valve (6) is used to control the clamping and loosening of the gripper cylinder. The mud hydraulic valve (1) controls the opening and closing of the mud pump (2). The gripper cylinder pressure sensor (5) feeds back the gripper cylinder pressure signal. The mud sensor (3) is a pressure sensor and is used to feed back the mud pressure signal. And the PLC controller receives the feedback signal and issues a control signal. The rotation control system (7) is used to control the forward and reverse rotation of the rotation motor. The gripper cylinder pressure sensor (5) is installed on the pressure oil circuit of the gripper cylinder (4), and detects and outputs a pressure signal when the gripper cylinder (4) clamps and loosens. When the gripper cylinder (4) loosens, the gripper cylinder pressure sensor (5) detects the pressure of the gripper cylinder (4) and feeds it back to the PLC controller, and the PLC controller compares the received pressure fed back by the gripper cylinder pressure sensor (5) with the set gripper pressure of the PLC controller. The mud sensor (3) is installed on the mud pressure port of the mud pump (2), and detects and outputs a mud pressure signal. When the feedback force of the mud sensor (3) is greater than or less than the mud pressure set by the PLC controller, the abnormality of the mud pump (2) is judged by whether the PLC controller issues an alarm signal. The rotation control system (7) controls the forward and reverse rotation of the rotation motor (8), and feeds back the output control signal to the PLC controller. When the rotation motor (8) rotates forward, the PLC controller automatically starts the program of the mud pump (2) according to the magnitude of the pressure fed back by the gripper cylinder pressure sensor (5). The pressure signals fed back by the gripper cylinder pressure sensor (5) and the mud sensor (3) are received by the PLC controller, and the received signals are processed according to the set gripper cylinder pressure and mud pressure of the PLC controller, and corresponding control signals are issued according to the set program. An alarm is fixedly installed on the PLC controller connected to the mud pump (2), and is used to give an alarm when the start or stop of the mud pump (2) is abnormal.

2. The automatic start-stop control system for the mud of a trenchless horizontal directional drilling rig according to claim 1, characterized in that: A filter is added to the input port of the PLC controller connected to the mud pump (2), and the input signal is filtered by software filtering through PLC programming.

3. The automatic start-stop control system for the mud of a trenchless horizontal directional drilling rig according to claim 1, wherein: The signal lines of the PLC controller connected to the mud pump (2) are laid separately and the signals are transmitted through shielded cables.

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