Push-pull force control method for horizontal directional drilling machine and horizontal directional drilling machine
US11603751B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 25, 2019 |
| Grant date | Mar 14, 2023 |
| Priority date | — |
| Expiry date | Jul 25, 2039 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B47/06
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A push-pull force control method for a horizontal directional drilling machine with the following steps is provided. According to a correspondence relationship between a motor displacement and a maximum push-pull force of a drilling machine, the motor displacement is first adjusted, so that the required push-pull force can be obtained through the adjustment of the subsequent steps. Then, an oil feeding pressure of the motor is controlled according to a relationship between the push-pull force and the working pressure difference of the motor. Finally, the push-pull force of the motor is controlled in real time according to the oil feeding pressure of the motor to be equal to the required push-pull force value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.