Automatic slurry start-stop control system of trenchless horizontal directional drilling machine

Abstract

The invention discloses an automatic slurry start-stop control system of a trenchless horizontal directional drilling machine, relates to the technical field of automatic slurry start-stop control systems of drilling machines, and solves the problems of high construction cost, high energy consumption and low efficiency of a traditional drilling machine directly driven by a diesel engine. Comprising a slurry hydraulic valve, a slurry pump, a slurry sensor, a holder oil cylinder, a holder oil cylinder pressure sensor, a holder oil cylinder control valve, a rotation control system and a rotation motor, the slurry pump is fixedly connected with the slurry hydraulic valve, the slurry hydraulic valve is linearly connected with the slurry sensor, and the holder oil cylinder is fixedly connected with the holder oil cylinder control valve. And the holder oil cylinder control valve is linearly connected with the clamping oil cylinder pressure sensor, so that the personal injury of constructors in the construction process caused by forgetting to close the slurry in the rod unloading process is reduced, the construction risk caused by forgetting to open the slurry is avoided, the slurry loss caused by forgetting to close the slurry is reduced, and the construction cost is saved.

Description

Technical Field

[0001] The invention relates to the technical field of a drilling rig mud automatic start-stop control system, and in particular to a trenchless horizontal directional drilling rig mud automatic start-stop control system. Background Art

[0002] At present, the start and stop of the mud in trenchless horizontal directional drilling rigs are all controlled manually using switches. In the actual construction process, the driller often forgets to turn on the mud switch at the beginning of drilling, resulting in lack of lubrication during the horizontal directional drilling process, sintering of the guide drill bit, lack of lubrication and support during the hole expansion process, drill stuck, hole collapse and other engineering accidents, lack of lubrication and support during the pipe dragging process and other engineering accidents; when loading and unloading the drill pipe, the driller forgets to turn off the mud, which will cause irregular mud spraying after the drill pipe is unfastened, which will not only waste resources but also cause harm to the surrounding construction personnel. The above are all hidden dangers caused by manually operating the mud switch, which will not only cause economic losses to the construction workers, but also cause personal injuries to the construction workers, and will increase the construction risks caused by the start and stop of the mud, increase costs, and reduce the personal safety of the construction workers. Summary of the invention

[0003] In view of the shortcomings of the prior art, the present invention provides a trenchless horizontal directional drilling rig mud automatic start and stop control system, 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 implemented through the following technical solutions: a trenchless horizontal directional drilling rig mud automatic start and stop control system, including a mud hydraulic valve, a mud pump, a mud sensor, a clamp cylinder, a clamp cylinder pressure sensor, a clamp cylinder control valve, a rotation control system and a rotation motor, the mud pump is fixedly connected to the mud hydraulic valve, the mud hydraulic valve is linearly connected to the mud sensor, the clamp cylinder is fixedly connected to the clamp cylinder control valve, and the clamp cylinder control valve is linearly connected to the clamp cylinder pressure sensor, the rotation control system is linearly connected to the rotation motor, and an LC controller is provided inside the drilling rig; The mud pump provides mud for the trenchless horizontal directional drilling rig. The clamp cylinder is used to cooperate with the power head to complete the loading and unloading and disassembly of the drill pipe. The clamp cylinder control valve is used to control the clamping and loosening of the clamp cylinder. The mud hydraulic valve controls the opening and closing of the mud pump. The clamp cylinder pressure sensor feeds back the clamp cylinder pressure signal. The mud sensor is a pressure sensor and is used to feed back the mud pressure signal. The PLC controller receives the feedback signal and sends out the control signal. The rotation control system is used to control the forward and reverse rotation of the rotation motor.

[0005] Preferably, the clamping cylinder pressure sensor is installed on the pressure oil circuit of the clamping cylinder, and detects and outputs a pressure signal when the clamping cylinder is clamped and released. When the clamping cylinder is released, the clamping cylinder pressure sensor detects the clamping cylinder pressure and feeds it back to the PLC controller, and the PLC controller compares the feedback pressure received from the clamping cylinder pressure sensor with the clamping pressure set by the PLC controller, thereby facilitating the protection of the use of the mud pump.

[0006] Preferably, the mud sensor is installed on the mud pressure port of the mud pump, and detects and outputs the 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, and whether the PLC controller sends an alarm signal, the abnormality of the mud pump is judged, thereby facilitating the detection of the working status of the mud pump.

[0007] Preferably, the rotary control system feeds back the output control signal to the PLC controller by controlling the forward and reverse rotation of the rotary motor. The rotary motor rotates forward, and the PLC controller starts the mud pump automatic start program according to the feedback pressure from the clamping cylinder pressure sensor, thereby facilitating the operation of the mud pump.

[0008] 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 clamping cylinder pressure and mud pressure set by the PLC controller, and corresponding control signals are sent out according to the set program, thereby facilitating the control of the mud pump and the clamping cylinder.

[0009] Preferably, the PLC controller connected to the mud pump has a filter added to the input port, and the input signal is filtered through PLC programming and software filtering is performed on the input signal, thereby removing high-frequency noise and enabling the filter to achieve average filtering and median filtering.

[0010] 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.

[0011] Preferably, an alarm is fixedly installed on the PLC controller connected to the mud pump, and is used to sound an alarm when an abnormality occurs during the startup or shutdown of the mud pump, thereby conveniently reminding the staff and enabling them to perform timely maintenance.

[0012] The present invention provides a trenchless horizontal directional drilling rig mud automatic start-stop control system, which has the following beneficial effects: 1. This is a trenchless horizontal directional drilling rig mud automatic start and stop control system. When using the trenchless horizontal directional drilling rig mud automatic start and stop control system, it can reduce the personal injury of the construction workers during the construction process due to forgetting to turn off the mud during the unloading process; 2. This is a trenchless horizontal directional drilling rig mud automatic start and stop control system. When using the trenchless horizontal directional drilling rig mud automatic start and stop control system, it can avoid construction risks caused by forgetting to start the mud; 3. This kind of trenchless horizontal directional drilling rig mud automatic start and stop control system can reduce mud loss caused by forgetting to turn off the mud when using the trenchless horizontal directional drilling rig mud automatic start and stop control system, saving construction costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a control framework diagram of the pressure principle of the present invention; Figure 2 This is a diagram of the automatic mud closing drive framework of the present invention; Figure 3 This is a diagram of the automatic mud start-up drive framework of the present invention.

[0014] 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

[0015] 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. Example 1

[0016] See also Figure 1-3 The embodiment of the present invention provides a mud automatic start-stop control system for a trenchless horizontal directional drilling rig, comprising a mud hydraulic valve 1, a mud pump 2, a mud sensor 3, a clamper cylinder 4, a clamper cylinder pressure sensor 5, a clamper 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 clamper cylinder 4 is fixedly connected to the clamper cylinder control valve 6, and the clamper cylinder control valve 6 is linearly connected to the clamper 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 provides mud for the trenchless horizontal directional drilling rig, and the clamp cylinder 4 is used to cooperate with the power head to complete the loading and unloading and disassembly of the drill rod; the clamp cylinder control valve 6 is used to control the clamping and loosening of the clamp cylinder, the mud hydraulic valve 1 controls the opening and closing of the mud pump 2, the clamp cylinder pressure sensor 5 feeds back the clamp 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 sends a control signal, the rotation control system 7 is used to control the forward and reverse rotation of the rotation motor, and the PLC controller sets the pressure value of the pressure sensor for the clamp cylinder pressure sensor 5, so that the pressure value of the clamp cylinder pressure sensor 5 is greater than or less than the set pressure value to control the start and stop of the mud pump 2. Example 2

[0017] In order to facilitate the detection and judgment of abnormalities in the start-up and shutdown of the mud pump 2, in this embodiment, Figure 2-3 As shown, the clamping cylinder pressure sensor 5 is installed on the pressure oil circuit of the clamping cylinder 4, and detects and outputs the pressure signal when the clamping cylinder 4 is clamped and released. When the clamping cylinder 4 is released, the clamping cylinder pressure sensor 5 detects the pressure of the clamping cylinder 4 and feeds it back to the PLC controller, and the PLC controller compares the feedback pressure received from the clamping cylinder pressure sensor 5 with the clamping pressure set by the PLC controller. The mud sensor 3 is installed on the mud pressure port of the mud pump 2, and detects and outputs the 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 PLC controller sends an alarm signal. To judge the abnormality of mud pump 2, the automatic shutdown program of mud pump 2 is started, the PLC controller outputs the control signal, the mud hydraulic valve 1DT3 loses power, and the mud pump 2 is closed. At this time, the mud sensor 3 feeds back the mud pressure signal. When the feedback pressure of the mud sensor 3 is less than or equal to the mud pressure set by the PLC controller, the mud pump 2 is completely closed; when the feedback pressure of the mud sensor 3 is greater than the mud pressure set by the PLC controller, the mud pump 2 is closed abnormally, and the mud hydraulic valve 1DT3 loses power again. If the feedback pressure of the mud sensor 3 is still greater than the mud pressure set by the PLC controller, the PLC controller sends out an alarm signal, and the drilling rig operator needs to manually check the abnormality. Example

[0018] In order to facilitate the normal start-up of the mud pump 2, in this embodiment, Figure 1-3As shown, the rotation control system 7 feeds back the output control signal to the PLC controller by controlling the forward and reverse rotation of the rotation motor 8. The rotation motor 8 rotates forward, and the PLC controller starts the automatic start program of the mud pump 2 according to the feedback pressure of the clamping 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 a mud pressure signal. When the feedback pressure of the mud sensor 3 is greater than or equal to the mud pressure set by the PLC controller, the mud pump 2 is started. Example 3

[0019] To prevent the PLC from being interfered when receiving signals, in this embodiment, Figure 1-3 As shown, the pressure signals fed back by the clamping cylinder pressure sensor 5 and the mud sensor 3 are received by the PLC controller, and the received signals are processed according to the clamping cylinder pressure and mud pressure set by the PLC controller, and the corresponding control signals are sent out according to the set program. The PLC controller connected to the mud pump 2 has a filter added to the input port, and the input signal is filtered by software filtering through PLC programming. The signal lines 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 abnormalities occur when the mud pump 2 is started or shut down. The start of the mud pump 2 requires that the clamping cylinder 4 release pressure is greater than or equal to the set pressure of the PLC controller and the rotation control system 7DT5 is energized to rotate forward.

[0020] It should be noted that in this embodiment, when using the automatic start and stop control system of the trenchless horizontal directional drilling rig mud, Figure 2As shown in 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 is clamped, the clamping device pressure sensor 5 detects the pressure of the clamping device cylinder 4 and feeds it back to the PLC controller, and the PLC controller compares the feedback pressure received from the clamping cylinder pressure sensor 5 with the clamping pressure set by the PLC controller. When the feedback pressure of the clamping cylinder pressure sensor 5 is less than the clamping pressure set by the PLC controller, the automatic shutdown program of the mud pump 2 is not started; when the feedback pressure of the clamping cylinder pressure sensor 5 is greater than or equal to the clamping pressure set by the PLC controller, the automatic shutdown program of the mud pump 2 is not started. The sequence starts, the PLC controller outputs a control signal, the mud hydraulic valve 1DT3 loses power, and the mud pump 2 is turned off. At this time, the mud sensor 3 feeds back a mud pressure signal. When the feedback pressure of the mud sensor 3 is less than or equal to the mud pressure set by the PLC controller, the mud pump 2 is completely turned off; when the feedback pressure of the mud sensor 3 is greater than the mud pressure set by the PLC controller, the mud pump 2 is abnormally turned off, and the mud hydraulic valve 1DT3 loses power again. If the feedback pressure of the mud sensor 3 is still greater than the mud pressure set by the PLC controller, the PLC controller sends out an alarm signal, and the drilling rig operator needs to manually check for abnormalities; like Figure 3 As shown, the electrical topology diagram of the automatic start of the mud pump 2, the automatic start of the mud pump 2 meets two conditions: ①. The release pressure of the clamp cylinder 4 is greater than or equal to the set pressure of the PLC controller; ②. The rotation control system DT5 is powered and rotates forward; if any of the conditions is not met, the mud pump 2 cannot be automatically started; The clamping cylinder control valve 6DT1 is energized, the clamping cylinder 4 is released, the clamping 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 clamping pressure set by the PLC controller. When the feedback pressure of the clamping cylinder pressure sensor 5 is less than the clamping pressure set by the PLC controller, the automatic start program of the mud pump 2 will not start; when the feedback pressure of the clamping cylinder pressure sensor 5 is greater than or equal to the clamping pressure set by the PLC controller and the rotation control system 7DT5 sends a signal, the rotation motor 8 rotates forward, and the signal received by the PLC controller meets the above two conditions Conditions, the automatic start program of mud pump 2 is started, the PLC controller outputs a control signal, the mud hydraulic valve 1DT3 is energized, and the mud pump 2 is started. 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 mud pressure set by the PLC controller, the start of the mud pump 2 is completed; when the feedback pressure of the mud sensor 3 is less than the mud pressure set by the PLC controller, the start of the mud pump 2 is abnormal, and the mud hydraulic valve 1DT3 is energized again. If the feedback pressure of the mud sensor 3 is still less than the mud pressure set by the PLC controller, the PLC controller sends out an alarm signal, and the drilling rig operator needs to manually check for abnormalities.

[0021] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the attached claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0022] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A trenchless horizontal directional drilling rig mud automatic start and stop control system, characterized in that: The drilling rig comprises a mud hydraulic valve (1), a mud pump (2), a mud sensor (3), a clamping cylinder (4), a clamping cylinder pressure sensor (5), a clamping cylinder control valve (6), a rotation control system (7) and a rotation motor (8), wherein 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 clamping cylinder (4) is fixedly connected to the clamping cylinder control valve (6), the clamping cylinder control valve (6) is linearly connected to the clamping cylinder pressure sensor (5), the rotation control system (7) is linearly connected to the rotation motor (8), and an LC controller is arranged inside the drilling rig; The mud pump (2) provides mud for the trenchless horizontal directional drilling rig; the clamp cylinder (4) is used to cooperate with the power head to complete the loading and unloading and disassembly of the drill pipe; the clamp cylinder control valve (6) is used to control the clamping and loosening of the clamp cylinder; the mud hydraulic valve (1) controls the opening and closing of the mud pump (2); the clamp cylinder pressure sensor (5) feeds back the clamp cylinder pressure signal; the mud sensor (3) is a pressure sensor and is used to feed back the mud pressure signal; the PLC controller receives the feedback signal and sends out the control signal; the rotation control system (7) is used to control the forward and reverse rotation of the rotation motor.

2. According to claim 1, a trenchless horizontal directional drilling rig mud automatic start and stop control system is characterized by: The clamping cylinder pressure sensor (5) is installed on the pressure oil circuit of the clamping cylinder (4), and detects and outputs a pressure signal when the clamping cylinder (4) is clamped and released. When the clamping cylinder (4) is released, the clamping cylinder pressure sensor (5) detects the pressure of the clamping cylinder (4) and feeds it back to the PLC controller, and the PLC controller compares the feedback pressure received from the clamping cylinder pressure sensor (5) with the clamping pressure set by the PLC controller.

3. According to claim 1, a trenchless horizontal directional drilling rig mud automatic start and stop control system is characterized by: 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 whether the PLC controller sends an alarm signal, the abnormality of the mud pump (2) is determined.

4. According to claim 1, a trenchless horizontal directional drilling rig mud automatic start and stop control system is characterized by: The rotation control system (7) feeds back the output control signal to the PLC controller by controlling the forward and reverse rotation of the rotation motor (8). The rotation motor (8) rotates forward, and the PLC controller starts the automatic start program of the mud pump (2) according to the feedback pressure of the clamping cylinder pressure sensor (5).

5. According to claim 1, a trenchless horizontal directional drilling rig mud automatic start and stop control system is characterized by: The pressure signals fed back by the clamping cylinder pressure sensor (5) and the mud sensor (3) are received by the PLC controller, and the received signals are processed according to the clamping cylinder pressure and mud pressure set by the PLC controller, and corresponding control signals are issued according to the set program.

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

7. According to claim 1, a trenchless horizontal directional drilling rig mud automatic start and stop control system is characterized by: The signal lines of the PLC controller connected to the mud pump (2) are laid separately, and the signals are transmitted through a shielded cable.

8. According to claim 1, a trenchless horizontal directional drilling rig mud automatic start and stop control system is characterized by: An alarm is fixedly installed on the PLC controller to which the mud pump (2) is connected, and is used to generate an alarm when an abnormality occurs during the start-up or shutdown of the mud pump (2).

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