CN-121993051-A - Automatic locking device and telescopic drill rod thereof

Abstract

The invention discloses an automatic locking device and a telescopic drill rod thereof, and belongs to the technical field of engineering machinery. The automatic locking device comprises an upper connecting seat, a telescopic oil cylinder, a lower connecting seat, sliding blocks and locking blocks, wherein the upper connecting seat is fixedly arranged in a telescopic drill rod, the lower connecting seat is connected with the upper connecting seat through the telescopic oil cylinder, the lower connecting seat is of a conical barrel structure with a wide upper part and a narrow lower part, sliding rails are arranged on the outer surface of the lower connecting seat along the vertical direction, the sliding blocks are slidably arranged on the sliding rails, and the locking blocks are fixedly arranged on the sliding blocks. The telescopic oil cylinder drives the lower connecting seat to lift, and the sliding block slides along the sliding rail and drives the locking block to horizontally stretch out and draw back, so that automatic locking and unlocking are realized. The invention also discloses a telescopic drill rod comprising the automatic locking device. The invention can realize automatic locking and unlocking of the drill rod, does not need manual intervention, remarkably improves the construction efficiency and meets the requirement of full-flow automatic construction.

Inventors

• SUN YU
• FAN QIANGSHENG
• TANG HENGYU
• SHI XINZHONG
• LIU JUN
• WANG PENG
• SHAN CHANGMENG
• SONG JIAN

Assignees

• 徐州徐工基础工程机械有限公司

Dates

Publication Date

20260508

Application Date

20260331

Claims (9)

1. 1. The automatic locking device is characterized by comprising an upper connecting seat (1), a telescopic oil cylinder (2), a lower connecting seat (3), a sliding block (4) and a locking block (5), wherein the upper connecting seat (1) is used for fixedly installing the automatic locking device in the telescopic drill rod; The lower connecting seat (3) is of a cone-shaped barrel structure, the shape of the lower connecting seat is of a shape with a wide upper part and a narrow lower part, sliding rails (6) are uniformly distributed on the outer surface of the lower connecting seat (3) along the vertical direction, sliding grooves matched with the sliding rails (6) are formed in the sliding blocks (4), the sliding blocks (4) are slidably mounted on the sliding rails (6) through the sliding grooves, and locking blocks (5) are fixedly mounted on the sliding blocks (4).
2. 2. An automatic locking device according to claim 1, characterized in that the slide rail (6) is arranged in the direction of the conical generatrix of the lower connecting seat (3).
3. 3. The automatic locking device according to claim 1, wherein the telescopic cylinder (2) drives the lower connecting seat (3) to lift when telescopic, and the sliding block (4) slides under the guidance of the sliding rail (6) to drive the locking block (5) to move in a telescopic manner in the horizontal direction.
4. 4. The telescopic drill rod comprises an outer section drill rod (11) and an inner section drill rod (12), wherein the inner section drill rod (12) is sleeved in the outer section drill rod (11), and the telescopic drill rod is characterized in that an automatic locking device (13) according to any one of claims 1 to 3 is arranged in the inner section drill rod (12), lock holes are correspondingly formed in the outer section drill rod (11) and the inner section drill rod (12), and locking blocks (5) of the automatic locking device (13) correspond to the lock holes in the inner section drill rod (12).
5. 5. The telescopic drill rod according to claim 4, wherein the inner surface of the outer section of drill rod (11) is provided with a key bar, the outer surface of the inner section of drill rod (12) is provided with a clamping groove matched with the key bar, and the key bar is clamped in the clamping groove.
6. 6. The telescopic drill rod according to claim 4, wherein a limit retainer ring is arranged below the inside of the outer joint drill rod (11), and a step is arranged at the upper end part of the outer joint drill rod (11).
7. 7. Telescopic drill rod according to claim 4, characterized in that the automatic locking device (13) is mounted above the inside of the inner joint drill rod (12).
8. 8. Telescopic drill rod according to claim 4, characterized in that the position of the locking hole is adapted to the maximum extension of the inner joint drill rod (12).
9. 9. Telescopic drill rod according to claim 4, characterized in that the lower end of the outer joint drill rod (11) is provided with a sealing ring (14), the sealing ring (14) being tightly fitted between the outer joint drill rod (11) and the inner joint drill rod (12).

Description

Automatic locking device and telescopic drill rod thereof Technical Field The invention relates to the technical field of engineering machinery, in particular to an automatic locking device and a telescopic drill rod comprising the same, which are particularly suitable for vibroflotation gravel pile construction processes. Background The vibroflotation gravel pile method is a common foundation reinforcement method, and is particularly suitable for treating soft foundations such as sandy soil, silt soil, soft soil and the like. In the construction method, a drill rod is driven to sink to the designed depth by a vibroflotation device, aggregates such as broken stones are filled in, and a composite foundation is formed through vibration compaction. As infrastructure construction progresses to deeper, more complex geological conditions, higher demands are placed on the construction depth and efficiency of vibroflotation gravel piles. At present, a drill rod for vibroflotation gravel pile construction is mainly divided into two forms of a connecting rod type and a telescopic type. The rod-connecting type drill rod consists of a plurality of sections of drill rods with standard lengths. During construction, the drill rod needs to be lengthened section by section along with the increase of the drilling depth, and the drill rod needs to be detached section by section after the construction is completed. This structure, while simple, has significant drawbacks in practical applications. On the one hand, the frequent rod connection and disconnection operation consumes a large amount of auxiliary time, reduces the effective construction efficiency, and has higher proportion of the auxiliary operation time to the total time according to statistics. On the other hand, the construction depth of the extension rod type drill rod is limited by the height of a main machine, and is generally difficult to exceed 30 meters, and the applicability of the extension rod type drill rod is greatly limited for the reinforcement requirement of foundations such as deep soft soil and sandy pebbles exceeding 30 meters. In order to solve the problems of limited depth and long auxiliary time of the extension rod type drill rod, a telescopic drill rod appears in the prior art. The telescopic drill rod is generally composed of an outer section drill rod and an inner section drill rod, and the inner section drill rod can axially stretch and retract relative to the outer section drill rod, so that a larger construction depth is realized on the premise of not increasing the height of a main machine. However, in the actual construction process, when the inner and outer sections of drill rods are required to be fixedly connected (for example, in the case of vibroflotation operation) or disconnected (for example, in the case of lifting the rods), the locking operation of the existing telescopic drill rods still mainly depends on manual work. In particular, it is often necessary for at least two persons to fit or remove mechanical fastening means, such as bolts, studs, etc. The method is not only difficult to realize automation of the construction flow, but also increases personnel configuration and auxiliary operation time, so that the construction cost is increased, and the requirements of modern construction on automation and high efficiency cannot be met. Therefore, how to realize automatic locking and unlocking of the telescopic drill rod in the construction process so as to reduce manual intervention and improve the construction efficiency and the automation level is a technical problem to be solved urgently by the person skilled in the art. Disclosure of Invention Aiming at the defects of the prior art, the invention provides an automatic locking device and a telescopic drill rod, and aims to solve the problem that full-flow automatic construction cannot be realized by using a vibroflotation gravel pile construction method. The telescopic drill rod with the structure can realize full-automatic operation in the telescopic construction process of the drill rod. In order to achieve the above purpose, the invention adopts the following technical scheme: An automatic locking device comprises an upper connecting seat, a telescopic oil cylinder, a lower connecting seat, a sliding block and a locking block. The upper connecting seat is used for fixedly mounting the automatic locking device in the telescopic drill rod. The lower connecting seat is connected with the upper connecting seat through a telescopic oil cylinder, and two ends of the telescopic oil cylinder are fixedly connected with the upper connecting seat and the lower connecting seat respectively. The lower connecting seat is of a cone barrel structure, the shape of the lower connecting seat is wide at the upper part and narrow at the lower part, and sliding rails are uniformly arranged on the outer surface of the lower connecting seat along the vertical direction. The sliding block is pro