E-mail: [email protected] Whatsapp: +8613647327093 Tel: +86-731-8403-0163
E-mail: [email protected] Whatsapp: +8613647327093 Tel: +86-731-8403-0163
With the continuous upgrading of modern foundation construction, construction efficiency, safety and cost control have become the focus of construction units. In the construction process of rotary pile foundation, the installation and removal of casing is an indispensable task, especially in the application scenario where the casing has a large diameter or a long length. The traditional manual disassembly and assembly method is not only inefficient, but also has great safety hazards.
In order to solve this problem, the automatic casing driver device came into being. It relies on hydraulic power control technology and realizes the rapid connection and separation between the casing and the drilling rig through an automated drive structure, without manual operation, thereby greatly improving the construction efficiency and safety factor. This article will systematically introduce the structural composition, working principle, core features and practical application value of the automatic casing driver.
The automatic casing driver device is mainly composed of the following parts:
Power head drive system: provides rotational power to realize the conversion of forward and reverse rotation, which is used to drive the casing to rotate in or out of the ground.
Lifting system: usually integrated in the hydraulic system of the mainframe of the drilling rig, which realizes the advancement or lifting of the casing through the action of lifting and lowering.
Cylinder drive module: One of the core components of the device, usually composed of two high-torque hydraulic cylinders, driving the connection structure to perform telescopic movement.
Connection and unlocking mechanism: The mechanical connection and unlocking between the driver and the casing are realized through the reciprocating action of the cylinder.
High-strength structural shell: Made of high-strength alloy steel, it ensures that the device still has sufficient durability under high torque and high load conditions.
The automatic casing driver works based on the mechanical linkage structure driven by the hydraulic control system. The main working process is as follows:
Connecting the casing: The drive device is lowered to the docking position with the casing mouth, the cylinder is started to stretch, and the connection mechanism is automatically inserted into the casing slot to achieve mechanical connection.
Screwing into the casing: The power head provides positive torque and presses down at the same time, and the casing begins to rotate into the formation.
After the construction is completed, the casing is removed: the drilling rig power head is lifted, and the cylinder pulls back the connection mechanism through the reverse action to achieve automatic unlocking.
Screwing out the casing: The power head reverses, driving the casing to be screwed out of the formation, and the entire drive device is lifted up at the same time.
During the whole process, there is no need for operators to enter the surrounding area of the casing for manual operation, and all actions are completed by hydraulic and power control.
The automatic casing driver has the following outstanding technical features:
1. No need for manual connection and disassembly
In traditional casing construction, multiple construction workers are often required to assist in bolt connection or manual alignment of the bayonet, which has the disadvantages of low efficiency, large errors, and many restricted conditions. The automatic casing driver realizes a fully automated connection and unlocking process, eliminating manual participation and greatly reducing human interference.
2. High-strength materials are used, and the structure is strong and reliable
The device housing and key transmission components are made of high-strength alloy steel or special treatment materials, with excellent impact resistance, wear resistance and bearing capacity. Even in complex geology such as rock layers and gravel layers, it can maintain a stable working state.
3. Widely adaptable to casing diameters
The driver can be configured for casings with a diameter of 600-1200mm according to construction needs, covering most of the current common casing specifications. At the same time, according to project requirements, casing connection tools suitable for larger or non-standard diameters can be customized and developed.
4. High efficiency of disassembly and assembly, saving time and cost
Thanks to the integrated design and hydraulic automatic control, the device realizes the real "quick installation and quick disassembly". Compared with the traditional manual method, the efficiency of casing installation can be increased by 2-3 times. Especially in large-scale projects, the time saved in the installation of each section of casing can accumulate to form a huge construction period advantage.
The automated operation process not only improves efficiency, but also significantly improves the construction safety level. During the installation or removal of casing, traditional methods require construction personnel to work in high-risk positions, such as the edge of casing, aerial work platform, etc., and safety accidents such as squeezing and falling may occur if they are not careful. The automatic casing driver concentrates all operations on the drilling rig operating platform to avoid personnel approaching the casing mouth, greatly reducing safety hazards.
In addition, the driver itself is equipped with multiple safety interlocks and hydraulic pressure limiting protection systems to ensure that it can stop running or perform protection actions in time under any abnormal working conditions, further ensuring the safety of construction personnel and equipment.
In the construction fields of large infrastructure projects, bridge pile foundations, high-rise buildings, etc., construction units have increasingly higher requirements for efficiency, progress, and safety. The promotion and application of automatic casing drivers can not only save labor costs, but also effectively shorten the construction cycle and reduce the overall construction cost.
At the same time, the characteristics of standardized equipment and intelligent operation make it easy to quickly deploy and switch in different projects and different types of drilling rigs, improving the versatility and utilization of equipment. With the strengthening of the mechanization and automation trend of construction, the frequency and coverage of this type of equipment will increase year by year, and it has significant market development prospects.
The automatic casing driver is suitable for the following construction scenarios:
Installation and removal of rotary pile casing
Construction of pre-buried casing for bridge pile foundations and tunnel support
Operation of special casings such as river cofferdams and water wells
As long as it involves the installation and removal of large-diameter steel casings, the device can be used to achieve automated operations and improve overall construction efficiency.
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