CN216132611U - Calibration device for motor variable starting point of power head of rotary drilling rig - Google Patents
Calibration device for motor variable starting point of power head of rotary drilling rig Download PDFInfo
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- CN216132611U CN216132611U CN202122769251.4U CN202122769251U CN216132611U CN 216132611 U CN216132611 U CN 216132611U CN 202122769251 U CN202122769251 U CN 202122769251U CN 216132611 U CN216132611 U CN 216132611U
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- 238000005553 drilling Methods 0.000 title claims abstract description 19
- 239000003921 oil Substances 0.000 description 22
- 238000010276 construction Methods 0.000 description 8
- 238000006073 displacement reaction Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 2
- 230000003111 delayed effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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Abstract
The utility model provides a calibration device for a variable starting point of a motor of a power head of a rotary drilling rig, which comprises a variable pressure gauge, a working pressure gauge, an overflow valve and an oil pipe, wherein the oil pipe comprises a main pipe and two branch pipes, the main pipe is connected with the branch pipes at a confluence point, the working pressure gauge and the overflow valve are arranged on the main pipe in series, and the variable pressure gauge is connected with a large cavity of a variable cylinder. The calibration device is used for calibrating the variable starting point without disassembling and assembling the power head motor of the rotary drilling rig, thereby avoiding system pollution caused by disassembly and assembly and saving a large amount of economic cost and time cost.
Description
Technical Field
The utility model relates to the field of engineering machinery, in particular to a calibration device for a variable starting point of a power head motor of a rotary drilling rig.
Background
At present, variable motors are adopted for power head motors of rotary drilling rigs, and mainly comprise a hydraulic control variable motor, an electric control variable motor and an automatic variable motor. The automatic variable motor is an automatic variable according to load pressure, when the load reaches a variable starting point pressure value, the variable push rod pushes from a Vgmin end to a Vgmax end of the variable cylinder 13 in a pressure range from a small displacement to a large displacement, as shown in FIG. 1. If the variable starting point of the power head motor is too low, the power head motor is changed to large displacement when the load pressure is very low, which is not beneficial to the construction under the light-load working condition with high construction rotating speed; if the variable starting point of the power head motor is too high, the load pressure reaches the maximum value set by the system, the power head motor is not changed, and the power head cannot output the maximum torque, so that the construction efficiency of heavy-load working conditions is reduced.
The rotary drilling rig generally can calibrate a variable starting point of a power head motor when leaving a factory, but the phenomenon that a motor variable mechanism is stuck or a spring becomes soft after working for a period of time and the like can occur during construction, so that the variable starting point is changed and needs to be calibrated again. In the prior art, a power head motor needing to be calibrated is detached and sent to a special test bed for calibration, so that time and labor are consumed, construction is delayed, and system pollution is easily caused due to long-time exposure of a hydraulic oil port in a construction site.
Therefore, there is a need in the art for an apparatus and method for calibrating a variable starting point of a motor of a power head of a rotary drilling rig on a construction site without disassembling the motor.
SUMMERY OF THE UTILITY MODEL
Therefore, the utility model firstly provides a calibration device for a variable starting point of a power head motor of a rotary drilling rig, the power head motor comprises an A, B oil port and a servo variable mechanism, the servo variable mechanism comprises a servo valve, a variable starting point adjusting spring and a variable cylinder 13, the variable cylinder 13 comprises a large cavity 131 and a small cavity 132, the calibration device comprises a variable pressure measuring meter 2, a working pressure measuring meter 3, an overflow valve 4 and an oil pipe 5, the A, B oil ports of the power head motor are all used for being connected to a forward rotation channel or a reverse rotation channel of a power head driving system through oil pipes, the oil pipe comprises a main pipe 51 used for being communicated with the forward rotation channel or the reverse rotation channel of the power head driving system and two branch pipes 52 used for being respectively connected with a A, B oil port of the power head motor, the main pipe and the branch pipes are connected at a confluence point 53, the working pressure measuring meter 3 and the overflow valve 4 are arranged on the main pipe 51 in series, the variable pressure gauge 2 is connected with the large cavity 131 of the variable cylinder 13.
In a specific embodiment, the range of the variable pressure gauge 2 is less than or equal to the range of the working pressure gauge 3.
In one specific embodiment, the relief valve 4 is disposed on the manifold 51 near the forward or reverse rotation passage of the powerhead drive system, and the operational pressure gauge 3 is disposed on the manifold 51 near the powerhead motor 1.
In the utility model, the positions of the working pressure gauge 3 and the overflow valve 4 can be interchanged, but the overflow valve can be used as the overflow valve on a forward rotation channel or a reverse rotation channel of the power head driving system, so that the overflow valve is generally arranged at one end close to the forward rotation channel or the reverse rotation channel of the power head driving system, and the working pressure gauge is arranged at one end close to a motor of the power head. When a new machine which is not delivered from a factory is used for calibrating a variable starting point of a power head motor, a special overflow valve 4 can be connected for calibration; when a machine on a construction site is used for calibrating a variable starting point of a power head motor, a safety valve on a forward rotation channel or a reverse rotation channel of a power head driving system is generally used as the overflow valve.
In a specific embodiment, the overflow valve 4 is a safety valve provided on a forward rotation channel or a reverse rotation channel of the power head driving system.
The utility model also provides a calibration method of the variable starting point of the power head motor of the rotary drilling rig, wherein the power head motor 1 comprises an A, B oil port and a servo variable mechanism, the servo variable mechanism comprises a servo valve 11, a variable starting point adjusting spring 12 and a variable cylinder 13, the variable cylinder 13 comprises a large cavity 131 and a small cavity 132, the calibration method comprises the use of a calibration device, the calibration device comprises a variable pressure measuring meter 2, a working pressure measuring meter 3, an overflow valve 4 and an oil pipe 5, the oil pipe comprises a main pipe 51 and two branch pipes 52, the main pipe and the branch pipes are connected at a confluence point 53, the working pressure measuring meter 3 and the overflow valve 4 are arranged on the main pipe 51 in series, and the variable pressure measuring meter 2 is connected with the large cavity 131 of the variable cylinder 13;
the calibration method comprises the following steps of,
step one, connection: connecting a main pipe of the calibration device to a forward rotation channel or a reverse rotation channel of the power head driving system, and respectively connecting two branch pipes to an A, B oil port of the power head motor, so that a A, B port of the power head motor is simultaneously connected to the forward rotation channel or the reverse rotation channel of the power head driving system;
step two, oil inlet: when a variable starting point is calibrated, a variable starting point value to be calibrated is set to be Po, if A, B ports of a power head motor are connected to a forward rotation channel of a power head driving system, the rotary drilling rig system is operated to enable oil to enter the forward rotation channel, an overflow valve 4 is adjusted to enable the pressure value of a working pressure gauge 3 to be Pn, and Pn is larger than Po; at this time, the variable starting point adjusting spring 12 is reset, so that no pressure display exists at the variable pressure measuring meter 2; similarly, if A, B ports of the power head motor are connected to a reverse channel of the power head driving system, operating the rotary drilling rig system to enable the reverse channel to enter oil;
step three, variable calibration: and adjusting the variable starting point adjusting spring 12 to gradually reverse the servo valve 11, so that the variable pressure gauge 2 connected with the large cavity 131 of the variable cylinder starts to display pressure which is a pressure value Px after being decompressed by the servo valve 11, and when the difference between the pressure value Pn measured by the working pressure gauge 3 and the pressure value Px measured by the variable pressure gauge 2 is equal to Po, the calibration of the variable starting point is completed.
The utility model has at least the following beneficial effects:
1) the A, B ports of the power head motors are connected to the same channel (a forward rotation channel or a reverse rotation channel) at the same time, so that system pressure building can be realized, the motors do not output torque and rotating speed, the power heads of the rotary drilling rigs do not output, variable starting points are fixed under the state, and the safety is high;
2) the overflow valve is used for adjusting the working pressure, so that the calibration of the parameter value of any variable starting point can be realized;
3) the sum of the pressure of the working pressure gauge and the pressure of the variable pressure gauge of the forward rotation channel or the reverse rotation channel is used for calibrating the variable starting point, so that the operation is simple and reliable;
4) the method does not need to disassemble and assemble the power head motor to calibrate the variable starting point, avoids system pollution caused by disassembly and assembly, and saves a large amount of economic cost and time cost.
Drawings
FIG. 1 is a schematic diagram of a calibration apparatus for a variable starting point of a motor of a power head according to the present invention.
Detailed Description
As with the present invention, the prior art powerhead motor 1 also incorporates a servo variable mechanism that also includes a servo valve 11, a variable start adjustment spring 12 and a variable cylinder 13 as shown in fig. 1.
The servo variable mechanism realizes variable by operating a hydraulic servo valve and pushing a variable cylinder piston by pressure oil output by a pump.
In the utility model, the servo valve 11 is subjected to micro-motion reversing under the actions of system pressure, variable cylinder piston feedback thrust and variable starting point adjusting spring force, the communication opening degree of a variable cylinder large cavity 131 and an oil tank 14 is controlled to realize pressure reduction, and if the communication opening degree of the variable cylinder large cavity 131 and the oil tank 14 is smaller, the pressure of the variable cylinder large cavity 131 is larger, the displacement of a power head motor is large; conversely, if the larger the degree of opening of the variable cylinder chamber 131 to the oil tank 14, the smaller the pressure in the variable cylinder chamber 131, the smaller the displacement of the power head motor.
In fig. 1 of the utility model, a working oil port of a power head motor A, B is simultaneously connected to a forward rotation channel or a reverse rotation channel of a power head driving system; a pressure gauge, namely a working pressure gauge 3, is arranged on the forward rotation channel or the reverse rotation channel, a pressure gauge, namely a variable pressure gauge 2, is arranged at a pressure measuring port of a variable cylinder 13 of the power head motor, and the variable starting point of the power head motor is calibrated by utilizing the pressure difference between the two pressure gauges to be equal to the variable starting point.
The utility model provides a method for calibrating a variable starting point of a power head motor of a rotary drilling rig, which comprises a power head motor 1, a variable pressure gauge 2, a working pressure gauge 3 and an overflow valve 4, wherein the power head motor 1 is further integrated with a servo variable mechanism which comprises a servo valve 11, a variable starting point adjusting spring 12 and a variable cylinder 13. The A, B port of the power head motor 1 is simultaneously connected to a forward rotation channel or a reverse rotation channel of the power head driving system, the overflow valve 4 is arranged on the channel connected with the power head motor 1, the connected channel is simultaneously provided with a working pressure gauge 3, and a variable pressure gauge 2 is arranged at a variable cylinder pressure measuring port of the power head motor.
In the utility model, the overflow valve 4 is arranged on a channel connected with the power head motor 1, and the normal rotation channel and the reverse rotation channel of a general power head motor driving system are both provided with safety valves which can be used as the overflow valve 4 in the utility model.
When a variable starting point is calibrated, a variable starting point value to be calibrated is set to be Po, for example, an A, B port of a power head motor 1 is connected to a forward rotation channel of a power head driving system, a drilling machine system is operated to enable oil to enter the forward rotation channel, an overflow valve 4 is adjusted to enable a pressure value of a working pressure gauge 3 to be Pn, and Pn is larger than Po; at this point the variable pressure gauge 2 shows no pressure. Specifically, since the A, B cavity of the powerhead motor 1 is connected to the same one of the forward rotation path and the reverse rotation path, the A, B cavity is simultaneously acted upon, and thus the powerhead motor does not rotate no matter how much the powerhead motor is changed in volume and displacement. When the servo valve 11 is in the lower position (the dependent variable starting point adjusting spring 12 automatically resets, so the servo valve 11 is automatically in the lower position), the large cavity 131 of the dependent variable cylinder 13 is communicated with the shell oil drainage of the power head motor through the servo valve 11, the oil enters the shell oil tank 14, and the variable pressure gauge 2 connected with the large cavity 131 of the variable cylinder 13 has no pressure display.
Adjusting a variable starting point adjusting spring 12 to enable a servo valve 11 in the figure 1 to be reversed upwards, wherein the servo valve 11 slightly moves under the action of the cavity pressure of a power head motor A, B and the spring force of the variable starting point adjusting spring 12, at the moment, the servo valve 11 is equivalent to a proportional pressure reducing valve, the cavity pressure of the power head motor A, B is reduced, and then the reduced cavity pressure is applied to a large cavity 131 of a variable cylinder 13 to push a variable push rod in the variable cylinder 13 to drive the variable of the power head motor, so that the displacement is changed; the pressure value Px decompressed by the servo valve 11 is displayed and read by a variable pressure measuring meter 2 connected with a large cavity 131 of a variable cylinder 13, and when the pressure value Pn measured by the working pressure measuring meter 3 is equal to the pressure value Px measured by the variable pressure measuring meter 2 by adjusting a variable starting point adjusting spring 12, the variable starting point is calibrated.
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 essence of the present invention shall fall within the protection scope of the claims of the present invention.
Claims (4)
1. A calibration device for a variable starting point of a power head motor of a rotary drilling rig is characterized in that the calibration device comprises a variable pressure measuring gauge (2), a working pressure measuring gauge (3), an overflow valve (4) and an oil pipe (5), A, B oil ports of the power head motor are all connected to a forward rotation channel or a reverse rotation channel of a power head driving system through the oil pipe, the oil pipe comprises a main pipe (51) used for being communicated with the forward rotation channel or the reverse rotation channel of the power head driving system and two branch pipes (52) used for being respectively connected with A, B oil ports of the power head motor, the main pipe and the branch pipes are connected at a confluence point (53), the working pressure gauge (3) and the overflow valve (4) are arranged on the main pipe (51) in series, and the variable pressure gauge (2) is connected with a large cavity (131) of the variable cylinder (13).
2. The calibration device for the variable starting point of the motor of the power head of the rotary drilling rig according to claim 1, wherein the measuring range of the variable pressure gauge (2) is less than or equal to the measuring range of the working pressure gauge (3).
3. The device for calibrating the variable starting point of the motor of the power head of the rotary drilling rig according to claim 1, wherein the overflow valve (4) is arranged at one end, close to a forward rotation channel or a reverse rotation channel of a power head driving system, of the main pipe (51), and the working pressure gauge (3) is arranged at one end, close to the motor (1) of the power head, of the main pipe (51).
4. The device for calibrating the variable starting point of the motor of the power head of the rotary drilling rig according to any one of claims 1 to 3, wherein the overflow valve (4) is a safety valve arranged on a forward rotation channel or a reverse rotation channel of a power head driving system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122769251.4U CN216132611U (en) | 2021-11-12 | 2021-11-12 | Calibration device for motor variable starting point of power head of rotary drilling rig |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122769251.4U CN216132611U (en) | 2021-11-12 | 2021-11-12 | Calibration device for motor variable starting point of power head of rotary drilling rig |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216132611U true CN216132611U (en) | 2022-03-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122769251.4U Active CN216132611U (en) | 2021-11-12 | 2021-11-12 | Calibration device for motor variable starting point of power head of rotary drilling rig |
Country Status (1)
| Country | Link |
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| CN (1) | CN216132611U (en) |
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2021
- 2021-11-12 CN CN202122769251.4U patent/CN216132611U/en active Active
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