CN112727618B - Intelligent idling system of rotary drilling rig - Google Patents
Intelligent idling system of rotary drilling rig Download PDFInfo
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- CN112727618B CN112727618B CN202011593822.7A CN202011593822A CN112727618B CN 112727618 B CN112727618 B CN 112727618B CN 202011593822 A CN202011593822 A CN 202011593822A CN 112727618 B CN112727618 B CN 112727618B
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- shuttle valve
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- unlocking
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- 238000005553 drilling Methods 0.000 title claims abstract description 32
- 230000009471 action Effects 0.000 claims abstract description 55
- 230000008602 contraction Effects 0.000 claims description 5
- 239000000284 extract Substances 0.000 claims description 3
- 230000001276 controlling effect Effects 0.000 claims description 2
- 230000000875 corresponding effect Effects 0.000 claims description 2
- 230000008859 change Effects 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/04—Introducing corrections for particular operating conditions
- F02D41/08—Introducing corrections for particular operating conditions for idling
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B44/00—Automatic control systems specially adapted for drilling operations, i.e. self-operating systems which function to carry out or modify a drilling operation without intervention of a human operator, e.g. computer-controlled drilling systems; Systems specially adapted for monitoring a plurality of drilling variables or conditions
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D29/00—Controlling engines, such controlling being peculiar to the devices driven thereby, the devices being other than parts or accessories essential to engine operation, e.g. controlling of engines by signals external thereto
Abstract
The invention provides an intelligent idle speed system of a rotary drilling rig, which comprises a shuttle valve group idle speed identification module, an unlocking idle speed identification module, a switching idle speed identification module, an action button idle speed identification module and an electric controller, wherein idle speed identification signals are input into the electric controller by the modules, the electric controller receives the identification signals of the modules and converts the identification signals into output signals to an engine, the shuttle valve group idle speed identification module comprises a power head pilot component, a main winch pilot component and a pressurizing pilot component, the unlocking idle speed identification module comprises a walking unlocking button, a platform rotation unlocking button and a mast verticality adjusting unlocking button, the switching idle speed identification module comprises an amplitude changing switching button and an auxiliary winch switching button, and the action button idle speed identification module comprises a crawler oil cylinder extending button and a crawler oil cylinder retracting button. According to the system, the automatic idling operation of the rotary drilling rig can be completed only by five shuttle valves. The automatic idling system provided by the invention has low cost and low system failure rate.
Description
Technical Field
The invention belongs to the field of engineering machinery, and particularly relates to an engine rotating speed control system of a rotary drilling rig.
Background
The rotary drilling rig is provided with an automatic engine idling system, namely when an engine of the rotary drilling rig does not shut down and a hydraulic system does not work, the engine needs to be in a low idling state, but when the hydraulic system works, the rotating speed of the engine needs to be increased, so that fuel consumption can be reduced, and the service lives of the engine and a hydraulic element are prolonged. Therefore, when the hydraulic system needs to be identified to work and not work, a shuttle valve group is generally designed on the pilot of the hydraulic system, and a pressure signal is extracted through a pressure switch and used as an identification signal of an automatic idling system of an electric system controller;
actions of the rotary drilling rig generally comprise a power head, a main winch, pressurization, walking, platform rotation, mast verticality adjustment, amplitude variation, an auxiliary winch, extension of a crawler oil cylinder and contraction of the crawler oil cylinder, and if all the actions take pilot pressure signals through shuttle valves, a shuttle valve group can only extract the pilot pressure signals of all the actions through 20 shuttle valves. Therefore, the shuttle valve group is high in cost, complex in structure and poor in maintainability.
Chinese patent CN201520191640 discloses an automatic idle speed control system of a rotary drilling rig based on detection of outlet pressure of a hydraulic pump, which comprises a main controller, a pressure sensor, an automatic idle speed enabling switch, an engine controller ECU and an accelerator system, wherein the pressure sensor and the automatic idle speed enabling switch are connected with an input end of the main controller; the main controller is connected with an engine controller ECU; the engine controller ECU is connected with the accelerator system; the main controller receives a hydraulic pump outlet pressure signal detected by the pressure sensor, a current throttle signal sent by the engine controller ECU and an automatic idle speed enabling switch signal, processes and judges the signals, sends different control instructions to the engine controller ECU, and the engine controller ECU controls the throttle opening according to the instructions. The utility model discloses a substitute the pilot pressure that comes from the shuttle valves with the outlet pressure of hydraulic pump, reduced the use of hydraulic system shuttle valve, hydraulic line arranges simply, has reduced the fault point.
Chinese patent CN201020294447 discloses an automatic idle speed control system of a rotary drilling rig. The control system comprises a controller, a pressure sensor, an accelerator potentiometer, an automatic idle speed enabling switch and an accelerator system of the engine, wherein the accelerator potentiometer, the pressure sensor and the automatic idle speed enabling switch are connected with the input end of the controller, and the output end of the controller is connected with the accelerator system of the engine; the throttle system of the engine is a controller ECM of the engine; or a throttle motor system of the engine. The automatic idling system directly utilizes the existing pressure sensor and controller, and reduces the use of components of a hydraulic system, namely shuttle valves of the hydraulic system. The advantages are that: 1. the structure is simple, and the installation is convenient; 2. the performance is reliable, and fault points are reduced; 3. saving cost and reducing energy consumption. The idle system of the above patent still has a large intelligent lift space.
Therefore, a new intelligent idle speed system of the rotary drilling rig is needed in the art.
Disclosure of Invention
The invention provides an intelligent idle speed system of a rotary drilling rig, which is used for the rotary drilling rig and comprises a shuttle valve group idle speed identification module, an unlocking idle speed identification module, a switching idle speed identification module, an action button idle speed identification module and an electric controller, wherein the shuttle valve group idle speed identification module (1), the unlocking idle speed identification module (2), the switching idle speed identification module (3) and the action button idle speed identification module (4) input idle speed identification signals into the electric controller, the electric controller receives the identification signals of the modules and converts the identification signals into output signals to an engine, the shuttle valve group idle speed identification module comprises a pilot power head component, a main hoisting pilot component and a pressurizing pilot component, the unlocking identification module comprises a walking unlocking button, a platform rotation unlocking button and a mast verticality adjusting unlocking button, the switching idle speed identification module comprises a luffing switching button and a secondary winding switching button, and the action button idle speed identification module comprises a caterpillar band hoisting oil cylinder stretching button and a caterpillar band oil cylinder button.
In a specific embodiment, the electric controller (5) is a programmable controller, receives each module identification signal and converts the module identification signal into an output signal to the engine (6) for realizing the rotation speed control of the engine. In the invention, the engine 6 controls the size of the throttle of the rotary drilling rig.
In a specific embodiment, the shuttle valve group idle speed identification module (1) further comprises a shuttle valve group (14) and a pressure switch (15), the shuttle valve group (14) comprises a shuttle valve I (141), a shuttle valve II (142), a shuttle valve III (143), a shuttle valve IV (144), a shuttle valve V (145), six oil inlets A1-A6 and six oil outlets B1-B6, the oil inlets A1 and A2 and the oil outlets B1 and B2 are used for connecting the power head pilot component (11), the oil inlets A3 and A4 and the oil outlets B3 and B4 are all used for connecting the main hoisting pilot component (12), the oil inlets A5 and A6 and the oil outlets B5 and B6 are all used for connecting the pressurizing pilot component (13), the first shuttle valve (141) is arranged between the oil inlets A1 and A2, the second shuttle valve (142) is arranged between the oil inlets A3 and A4, the third shuttle valve (143) is arranged between the oil inlets A5 and A6, the fourth shuttle valve (144) is used for connecting and being arranged between any two shuttle valves of the three shuttle valves from the first shuttle valve (141) to the third shuttle valve (143), the shuttle valve five (145) is used for being connected and arranged between the other shuttle valve of the three shuttle valves from the shuttle valve one (141) to the shuttle valve three (143) and the shuttle valve four (144), the shuttle valve five (145) is connected with the pressure switch (15) through an oil outlet B7, the pressure switch (15) is connected with the electric controller (5).
The invention has the following beneficial effects: according to the invention, the control logics of a power system, a hydraulic system and an electrical system of the rotary drilling rig are organically unified, and the signal extraction mode and classification of the automatic idling system of the engine are innovated, so that the automatic idling work of the rotary drilling rig can be completed only by five shuttle valves in the system. The automatic idling system of a common rotary drilling rig has a large number of shuttle valves, the cost of the automatic idling system is high, and the failure rate of the system is high. Correspondingly, the automatic idling system provided by the invention is low in cost and low in system failure rate.
Drawings
FIG. 1 is a schematic structural diagram of an intelligent idling system of a rotary drilling rig.
Detailed Description
As shown in fig. 1, the invention provides an intelligent idle speed system of a rotary drilling rig, which comprises a shuttle valve group idle speed identification module (1), an unlocking idle speed identification module (2), a switching idle speed identification module (3), an action button idle speed identification module (4) and an electric controller (5), wherein the shuttle valve group idle speed identification module (1), the unlocking idle speed identification module (2), the switching idle speed identification module (3) and the action button idle speed identification module (4) input idle speed identification signals to the electric controller (5), the electric controller (5) is used for outputting signals to an engine (6), the shuttle valve group idle speed identification module (1) comprises a power head pilot component (11), a main hoisting pilot component (12) and a pressurization pilot component (13), the unlocking idle speed identification module (2) comprises a walking unlocking button (21), a platform rotation unlocking button (22) and a mast verticality unlocking button (23), the switching idle speed identification module (3) comprises a switching button (31) and an auxiliary hoisting switching button (32), and the action button (4) comprises a crawler stretching oil cylinder (42).
In the present invention, the power head includes a mechanism for driving the drill rod in a forward or reverse direction to provide torque to the drill rod, as will be appreciated by those skilled in the art. The main winch is used for placing the drill rod into the drill hole or lifting the drill rod from the drill hole, and the auxiliary winch is used for auxiliary construction of the rotary drilling rig, such as hoisting of a reinforcement cage. The pressurization is to apply pressure to the drill rod so that the drill rod can drill downwards; the amplitude can align the drill pipe with the borehole. The "pilot" means that the operations are all performed in a hydraulic remote control in a cab, and are not directly performed on corresponding action equipment. The platform rotation means that the cab platform rotates on a chassis of the rotary drilling rig. The mast verticality adjustment means that the mast needs to be adjusted to be in a vertical state when a drill rod drills; and when the rotary drilling rig is transported or transferred, the mast is in a down-lying state. The extension and contraction of the crawler oil cylinder are two different states of the crawler oil cylinder, the extension of the crawler oil cylinder enables the distance between two parallel crawlers of the rotary drilling rig to be wider, and the rotary drilling rig generally is in the state when working; when the crawler oil cylinder is contracted, the distance between the two parallel crawlers is narrow, and the rotary drilling rig is generally in the state when in a transportation state.
Some actions of the rotary drilling rig are in consideration of safety, a locking function can be achieved electrically, and the actions can be achieved only by electrical unlocking in related actions, including walking, platform rotation and mast verticality adjustment. According to the invention, unlocking operation buttons are arranged on walking, platform rotation and mast verticality adjustment as unlocking input signals of the electric system controller, and the controller has output action only when the unlocking signal is obtained. The unlocking signals of walking, platform turning and mast verticality adjusting can be used as identification signals of the actions.
The rotary drilling rig is provided with a variable amplitude switching button and an auxiliary hoisting switching button, the switching button is pressed, an electric controller obtains an input signal of the switching action, and the controller outputs the switching action to the other action. For example, pressurization and amplitude variation are carried out, and the pressurization action is switched to the amplitude variation action by pressing a switching button for switching; and for example, the main winch and the auxiliary winch work by switching the main winch to the auxiliary winch when a switching button is pressed. The switching signals of the amplitude and the auxiliary winch can be used as identification signals of the actions.
Some actions of the rotary drilling rig are realized by controlling a reversing valve through a pilot electromagnetic valve, an action button is electrically arranged and operated, and the pilot electromagnetic valve is controlled to realize the actions through an output signal of an electric system controller. For example, when the crawler oil cylinder extends, the crawler oil cylinder extends and retracts, two buttons are arranged, the buttons are pressed, and the electric system controller receives an action signal, namely outputs a control signal, so that the crawler oil cylinder extends and retracts. These two motion button signals can be used as identification signals for track extension motion.
The invention provides an intelligent idling system of a rotary drilling rig, which is provided with a shuttle valve group type idling identification signal, an unlocking type idling identification signal, a switching type idling identification signal and an action button type idling identification signal, wherein the signals are used as each action identification signal of an electric controller, and the rotating speed control of an engine is realized through the controller. The shuttle valve group idle speed identification signal comprises several actions of a power head, a main winch and pressurization, and the several actions can be used for extracting the signal only by five shuttle valves; the unlocking idle speed identification signal comprises several actions of walking, platform rotation and mast verticality adjustment; the switching type idle speed identification signal comprises amplitude variation and auxiliary hoisting action; the action button type idle speed identification signal comprises the extending and retracting actions of the crawler oil cylinder.
The invention specifically comprises three unlocking operation buttons, two switching buttons and two action buttons, wherein the buttons are generally arranged on a handle or a display screen and are arranged at human-computer interaction positions in a cab. For example, when the amplitude change button 31 is pressed, the drill rod is switched from the pressurized state to the amplitude change state. When the auxiliary hoisting switch button 32 is pressed, the main hoisting state is switched to the auxiliary hoisting state. These buttons are not generally provided on the electric controller 5, and the electric controller 5 is a programmable controller. The shuttle valve group idle speed identification module (1) automatically extracts signals and does not need to be provided with any button.
In the invention, the signal extraction process in the idle speed identification module of the shuttle valve group class comprises the following principle steps.
1. Extracting idle speed identification signals of the power head: the power head pilot enters oil through the shuttle valve groups A1 and A2, and oil is discharged from the power heads B1 and B2, one power head is connected with the forward rotation pilot, and the other power head is connected with the reverse rotation pilot. For example, A1 and B1 receive the forward power head pilot, and A2 and B2 receive the reverse power head pilot. When the oil is fed into the A1, the pilot of the power head outputs the oil from the B1 and pushes the first shuttle valve and the fifth shuttle valve in the shuttle valve group to the right, the pressure oil reaches the pressure switch after passing through the first shuttle valve and the fifth shuttle valve, and the pressure switch receives the pressure and converts the pressure into a pressure signal to be input into the controller; when oil is fed into the A2, the pilot of the power head outputs oil from the B2 and pushes the first shuttle valve in the shuttle valve group to the left position, the fifth shuttle valve is pushed to the right position, pressure oil reaches the pressure switch after passing through the first shuttle valve and the fifth shuttle valve, and the pressure switch receives the pressure and converts the pressure into a pressure signal to be input into the controller.
2. Extracting idle speed identification signals of a main winch: the main winch pilot enters oil through the shuttle valve groups A3 and A4, the oil exits from the shuttle valve groups B3 and B4, one main winch lifting pilot is connected, and the other main winch lowering pilot is connected. When oil is fed into the valve A3, the main hoisting pilot outputs oil from the valve B3 and pushes the second shuttle valve and the fourth shuttle valve in the shuttle valve group to the right, the fifth shuttle valve is pushed to the left, pressure oil reaches the pressure switch after passing through the second shuttle valve, the fourth shuttle valve and the fifth shuttle valve, and the pressure switch receives the pressure and converts the pressure into a pressure signal to be input into the controller; when oil is fed into the A4, the main hoisting pilot pushes the second shuttle valve in the shuttle valve group to the left position while outputting the oil from the B4, the fourth shuttle valve pushes the right position, the fifth shuttle valve pushes the left position, pressure oil reaches the pressure switch after passing through the second shuttle valve, the fourth shuttle valve and the fifth shuttle valve, and the pressure switch receives the pressure and converts the pressure into a pressure signal to be input into the controller.
3. Extracting a pressurization idle speed identification signal: the pressurizing guide is fed with oil through the shuttle valve groups A5 and A6, the oil is discharged from the shuttle valve groups B5 and B6, one is connected with the pressurizing pull-up guide, and the other is connected with the pressurizing press-down guide. When oil is fed into the A5, the pressurizing pilot outputs oil from the B5, meanwhile, the shuttle valve III in the shuttle valve group is pushed to the right position, the shuttle valve IV is pushed to the left position, the shuttle valve V is pushed to the left position, pressure oil reaches the pressure switch after passing through the shuttle valve III, the shuttle valve IV and the shuttle valve V, and the pressure switch receives the pressure and converts the pressure into a pressure signal to be input into the controller; when oil is fed into the A6, the pressurizing pilot outputs oil from the B6 and pushes the third shuttle valve, the fourth shuttle valve and the fifth shuttle valve in the shuttle valve group to the left position, pressure oil reaches the pressure switch after passing through the third shuttle valve, the fourth shuttle valve and the fifth shuttle valve, and the pressure switch receives the pressure and converts the pressure into a pressure signal to be input into the controller.
The above examples are only for clearly illustrating the technical solutions of the present invention, and are not intended to limit the embodiments of the present invention. Any other changes or modifications of the equivalent technical features without changing the basic idea and the essence of the present invention shall fall within the protection scope of the claims of the present invention.
Claims (4)
1. An intelligent idle speed system of a rotary drilling rig is used for the rotary drilling rig and comprises a shuttle valve group idle speed identification module (1), an unlocking idle speed identification module (2), a switching idle speed identification module (3), an action button idle speed identification module (4) and an electric controller (5), wherein the shuttle valve group idle speed identification module (1), the unlocking idle speed identification module (2), the switching idle speed identification module (3) and the action button idle speed identification module (4) input idle speed identification signals to the electric controller (5), the electric controller (5) receives the identification signals of the modules and converts the identification signals into output signals to an engine (6), the shuttle valve group idle speed identification module (1) comprises a pilot component (11), a main hoisting pilot component (12) and a pressurizing pilot component (13), the unlocking idle speed identification module (2) comprises a walking unlocking button (21), a platform rotation unlocking button (22) and a mast verticality adjusting unlocking button (23), the switching idle speed identification module (3) comprises a power head switching button (31) and an auxiliary hoisting button (32), and the action button (4) comprises a crawler belt stretching cylinder (42);
in the intelligent idling system, a shuttle valve group idling identification module (1), an unlocking idling identification module (2), a switching idling identification module (3) and an action button idling identification module (4) correspond to a shuttle valve group idling identification signal, an unlocking idling identification signal, a switching idling identification signal and an action button idling identification signal which are used as identification signals of an electric controller (5) for corresponding actions, and a command for controlling the rotating speed of an engine (6) is output through the electric controller (5), so that the rotating speed control of the engine (6) is realized;
the shuttle valve group idle speed identification module (1) automatically extracts signals and is not provided with any button;
an unlocking operation button is arranged in the unlocking idle speed identification module (2) for walking, platform rotation and mast verticality adjustment of the rotary drilling machine to serve as an unlocking input signal of the electric controller (5), and the electric controller (5) obtaining the unlocking signal outputs a rotating speed control command to the engine (6);
the variable-amplitude switching button (31) is used for obtaining an input signal of a switching action by the electric controller (5) when the button is pressed down, and the electric controller (5) outputs and switches to another action, and particularly switches between the variable-amplitude action and a pressurizing action related to the pressurizing pilot component (13); the auxiliary hoisting switching button (32) is used for obtaining an input signal of a switching action by the electric controller (5) when the button is pressed down, and the electric controller (5) outputs and switches to another action, and particularly switches between the auxiliary hoisting action and a main hoisting action related to the main hoisting pilot component (12);
a crawler oil cylinder extension button (41) or a crawler oil cylinder contraction button (42) in an idle speed identification module (4) of action buttons is operated, signals of the two action buttons are used as identification signals of crawler extension and contraction actions, an electric controller (5) receives the action signals, namely outputs control signals to control a pilot electromagnetic valve, and the pilot electromagnetic valve controls a reversing valve to realize the extension and contraction actions of the crawler oil cylinder.
2. The intelligent idling system of claim 1, wherein the electrical controller (5) is a programmable controller that receives the module identification signals and converts them into output signals to the engine (6) for implementing engine speed control.
3. Intelligent idle system according to claim 1 or 2, characterized in that the shuttle valve group class idle identification module (1) further comprises a shuttle valve group (14) and a pressure switch (15), the shuttle valve group (14) comprises a shuttle valve I (141), a shuttle valve II (142), a shuttle valve III (143), a shuttle valve IV (144), a shuttle valve V (145), six oil inlets A1-A6 and six oil outlets B1-B6, the oil inlets A1 and A2 and the oil outlets B1 and B2 are used for connecting the power head pilot component (11), the oil inlets A3 and A4 and the oil outlets B3 and B4 are all used for connecting the main hoisting pilot component (12), the oil inlets A5 and A6 and the oil outlets B5 and B6 are all used for connecting the pressurizing pilot component (13), the first shuttle valve (141) is arranged between the oil inlets A1 and A2, the second shuttle valve (142) is arranged between the oil inlets A3 and A4, the third shuttle valve (143) is arranged between the oil inlets A5 and A6, the fourth shuttle valve (144) is used for connecting and being arranged between any two shuttle valves of the three shuttle valves from the first shuttle valve (141) to the third shuttle valve (143), the shuttle valve five (145) is used for being connected and arranged between the other shuttle valve of the three shuttle valves from the shuttle valve one (141) to the shuttle valve three (143) and the shuttle valve four (144), the shuttle valve five (145) is connected with the pressure switch (15) through an oil outlet B7, the pressure switch (15) is connected with the electric controller (5).
4. The intelligent idle system of claim 1 or 2, characterized in that the three unlocking operation type buttons, the two switching type buttons and the two action type buttons comprised by the unlocking type idle speed identification module (2), the switching type idle speed identification module (3) and the action button type idle speed identification module (4) are all arranged on a handle or a display screen in the cab.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011593822.7A CN112727618B (en) | 2020-12-29 | 2020-12-29 | Intelligent idling system of rotary drilling rig |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011593822.7A CN112727618B (en) | 2020-12-29 | 2020-12-29 | Intelligent idling system of rotary drilling rig |
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| CN112727618A CN112727618A (en) | 2021-04-30 |
| CN112727618B true CN112727618B (en) | 2023-02-24 |
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| CN202011593822.7A Active CN112727618B (en) | 2020-12-29 | 2020-12-29 | Intelligent idling system of rotary drilling rig |
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| CN114198081B (en) * | 2021-12-30 | 2024-03-08 | 恒天九五重工有限公司 | Working life monitoring system for rotary drilling rig executive component |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201778903U (en) * | 2010-08-14 | 2011-03-30 | 徐州徐工基础工程机械有限公司 | Automatic idle speed control system of rotary drilling rig |
| CN103362679A (en) * | 2012-03-28 | 2013-10-23 | 徐州雷曼机械科技有限公司 | Engine rotating speed control device of rotary drilling rig |
| CN204716408U (en) * | 2015-03-31 | 2015-10-21 | 徐州徐工基础工程机械有限公司 | Based on the automatic idle speed control system of rotary drilling rig detecting hydraulic pump outlet pressure |
| CN106762905A (en) * | 2016-12-27 | 2017-05-31 | 恒天九五重工有限公司 | Pilot hydraulic control system and rig based on multi-joint shuttle valve group |
| CN110985219A (en) * | 2019-09-02 | 2020-04-10 | 鹤山市厚积工程机械有限公司 | Device for enabling engine of rotary drilling rig to enter idle speed |
-
2020
- 2020-12-29 CN CN202011593822.7A patent/CN112727618B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201778903U (en) * | 2010-08-14 | 2011-03-30 | 徐州徐工基础工程机械有限公司 | Automatic idle speed control system of rotary drilling rig |
| CN103362679A (en) * | 2012-03-28 | 2013-10-23 | 徐州雷曼机械科技有限公司 | Engine rotating speed control device of rotary drilling rig |
| CN204716408U (en) * | 2015-03-31 | 2015-10-21 | 徐州徐工基础工程机械有限公司 | Based on the automatic idle speed control system of rotary drilling rig detecting hydraulic pump outlet pressure |
| CN106762905A (en) * | 2016-12-27 | 2017-05-31 | 恒天九五重工有限公司 | Pilot hydraulic control system and rig based on multi-joint shuttle valve group |
| CN110985219A (en) * | 2019-09-02 | 2020-04-10 | 鹤山市厚积工程机械有限公司 | Device for enabling engine of rotary drilling rig to enter idle speed |
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