In trenchless construction such as municipal pipe networks and communication pipelines, the automatic rod-change HDD, relying on intelligent upgrades, has become a core equipment to improve construction efficiency. Compared with the cumbersome process of traditional directional drills relying on manual rod changing, the automatic rod-change HDD breaks through construction pain points in terms of time, quality, and adaptability through technological innovation, redefining the standards of trenchless operations.

I. Automatic Rod Changing Saves Time and Increases Efficiency, Shortening the Construction Period

Traditional HDDs require manual handling and docking of drill rods, which is not only time-consuming and labor-intensive but also prone to affecting progress due to operational errors. The automatic rod-change HDD is equipped with a fully automatic drill rod loading and unloading device, which can accurately complete the grabbing, docking, and disassembly of drill rods through the hydraulic system. The time for a single rod change is shortened from the traditional 3-5 minutes to within 30 seconds. In long-distance construction, the automatic rod-change HDD can continuously complete the automatic replacement of dozens of drill rods, greatly reducing manual intervention, increasing the effective operation time of trenchless construction by more than 40%, and is especially suitable for municipal projects with tight schedules.

II. Precise Control Reduces Costs and Improves Quality, Reducing Rework Risks

Trenchless construction has extremely high requirements for the accuracy of the drilling trajectory; excessive deviation will lead to pipeline damage or rework. The automatic rod-change HDD integrates an intelligent control system, which can real-time monitor the drill rod angle, torque, and propulsion force. Combined with the precise alignment technology during automatic rod changing, the docking error of each section of drill rod is controlled at the millimeter level. At the same time, the equipment is equipped with a dual-motor-driven power head and a rack-and-pinion transmission system, allowing the automatic rod-change HDD to maintain stable thrust and speed in complex formations, reducing problems such as drill jamming and deflection, fundamentally lowering the rework rate and indirectly saving construction costs.

III. Strong Adaptability to Multiple Scenarios, Expanding Construction Boundaries

Trenchless construction often faces various terrains such as urban roads, farmland, and rivers, requiring high adaptability of equipment. The automatic rod-change HDD adopts an engineering rubber track design, which can walk stably in complex working conditions such as muddy and hardened roads without additional site leveling. In addition, the automatic rod-change HDD supports flexible switching of multiple drill rod specifications (such as φ52mm and φ60mm drill rods). Combined with adjustable entry angles, it can not only meet the construction of small-diameter municipal pipelines but also cope with the trenchless laying of large water transmission pipelines, making the automatic rod-change HDD a versatile trenchless tool for multiple scenarios.

Hengwang Group 135 HDD: A Practical Benchmark for Automatic Rod-Change Technology

As a representative product of the automatic rod-change HDD, Hengwang Group's HWF135 HDD empowers trenchless construction with strong performance. It is equipped with a Cummins 81kw high-power engine, which has strong power and low fuel consumption. Combined with a dual-motor-driven power head, the maximum torque reaches 3200N·m, easily handling complex formations such as rock layers and pebble layers.

In terms of automatic rod-changing function, the HWF135 supports fully automatic loading and unloading of φ52mm and φ60mm drill rods, with a standard configuration of 44 rods (φ52mm) and an optional configuration of 40 rods (φ60mm), greatly reducing manual operations. The equipment has a maximum construction distance of 200m and a pull-back/feed force of 135KN, balancing efficiency and stability.

In addition, Hengwang Group's comprehensive after-sales service system (24-hour hotline response, 24-hour on-site maintenance) ensures the long-term operation of the automatic rod-change HDD. Whether it is municipal engineering or cross-border projects, the HWF135 automatic rod-change HDD has demonstrated "high efficiency, precision, and reliability", becoming the preferred equipment for trenchless construction.

In summary, the automatic rod-change HDD comprehensively improves trenchless construction efficiency through three advantages: time saving via automatic rod changing, quality improvement through precise control, and boundary expansion with strong adaptability. As a model of technological implementation, Hengwang Group's 135 HDD fully releases the value of the automatic rod-change HDD in actual construction with solid performance and service guarantees, providing reliable solutions for global trenchless projects.