Device for preventing clogging of drill rod nozzle of pile driver

Abstract

The invention provides a pile driver drill rod nozzle clogging prevention device which is arranged in a drill rod, a scraper running track (23) is arranged on the periphery of the inner side wall of the drill rod, a drill rod guniting nozzle (22) is formed in the side wall above the scraper running track (23), and the drill rod guniting nozzle (22) comprises an upper part and a lower part which are connected with each other. The upper part comprises a grouting port (1), an air injection port (2), a slurry inflow front-end pipeline (3), an airflow inflow front-end pipeline (4) and an external thread joint (5), and the lower part comprises an internal and external thread joint (6), a slurry outflow rear-end pipeline (9), an airflow flowing middle-end pipeline (10), an airflow outflow rear-end pipeline (11), a double-edged scraper (12) and an air nozzle (13). And the internal and external thread joint (6) of the lower part comprises an internal thread (7) and an external thread (8), and the internal thread (7) of the internal and external thread joint (6) is matched with the external thread of the external thread joint (5) and is used for fixedly connecting the upper part and the lower part.

Description

Technical Field

[0001] The present invention relates to a novel anti-blocking device which is added inside the drill pipe of a pile driver. The device can make grouting and gas injection proceed simultaneously. Meanwhile, during the construction process of the drill pipe, the novel anti-blocking device of the present invention clears the blockage situation around the slurry spraying nozzle passage of the drill pipe at a set periodic frequency. Background Art

[0002] During the construction process of the drill pipe of a pile driver, the blockage of the nozzle is a common problem. The blockage of the nozzle will cause the cement slurry to be unable to be sprayed normally, affecting the uniformity and strength of the pile body, and thus reducing the quality and safety of the entire project. Traditional solutions usually require shutting down the machine to clean the nozzle, which not only takes time and effort but also seriously affects the construction progress. Summary of the Invention

[0003] The purpose of the present invention is to provide a device for preventing the blockage of the nozzle of the drill pipe of a pile driver, which can clean the nozzle at any time online. The technical solution is as follows:

[0004] A device for preventing the blockage of the nozzle of the drill pipe of a pile driver is placed inside the drill pipe. A scraper running track 23 is arranged around the inner side wall of the drill pipe. The drill pipe slurry spraying nozzle 22 is opened on the side wall above the scraper running track 23. It is characterized in that it includes two parts, an upper part and a lower part, which are connected to each other. The upper part includes a grouting port 1, a gas injection port 2, a front-end pipeline 3 for slurry inflow, a front-end pipeline 4 for air inflow, and an external thread joint 5. The lower part includes an internal and external thread joint 6, a rear-end pipeline 9 for slurry outflow, a middle pipeline 10 for air flow, a rear-end pipeline 11 for air outflow, a double-edge scraper 12, and a jet nozzle 13. Among them,

[0005] The internal and external thread joint 6 of the lower part includes an internal thread 7 and an external thread 8. The internal thread 7 of the internal and external thread joint 6 is matched with the external thread of the external thread joint 5 for the fixed connection of the upper and lower parts; the external thread 8 is used to fixedly connect the internal and external thread joint 6 to the motor body of the drill pipe;

[0006] The external thread joint 5 of the upper part is provided with two holes. After the fixed connection of the upper and lower parts is in place, the two ends of one hole correspond to the front-end pipeline 3 for slurry inflow and the rear-end pipeline 9 for slurry outflow respectively, and the two ends of the other hole correspond to the front-end pipeline 4 for air inflow and the middle pipeline 10 for air flow respectively;

[0007] The middle of the air flow middle pipeline 10 and the rear-end pipeline 11 for air outflow form an inverted T-shaped connection. A scraper is arranged at each end of the rear-end pipeline 11 for air outflow to form a double-edge scraper 12; the outer surface radian of the scraper is consistent with the inner wall of the drill pipe, and a jet nozzle 13 is arranged. The two scrapers are placed on the scraper running track 23; when the drill pipe rotates, the jet nozzle 13 and the drill pipe slurry spraying nozzle 22 are in two situations of alignment and non-alignment with each other.

[0008] Furthermore, the middle pipeline 10 for air flow and the rear pipeline 11 for air flow out are rigid components.

[0009] The device for preventing nozzle clogging of the drill rod of a pile driver according to the present invention is installed inside the drill rod through a fixing member, namely a central perforated disc, and can clean the nozzle of the drill rod in time online, which helps the smooth operation of the drill rod of the pile driver. Description of the Drawings

[0010] Figure 1 It is a schematic diagram of the overall structure of the anti-clogging device of the present invention.

[0011] Figure 2 It is an external view of the anti-clogging device of the present invention newly added to the drill rod of the pile driver

[0012] Figure 3 It is an inclined internal side view of the anti-clogging device of the present invention newly added to the drill rod of the pile driver.

[0013] Explanation of the reference numerals in the figure: 1 grouting port; 2 air injection port; 3 front pipeline for slurry inflow; 4 front pipeline for air flow inflow; 5 external thread joint; 6 internal and external thread joint; 7 internal thread; 8 external thread; 9 rear pipeline for slurry outflow; 10 middle pipeline for air flow; 11 rear pipeline for air flow out; 12 double-edge scraper; 13 double-edge scraper air nozzle; 14 central perforated disc; 15 internal thread in the hole; 16 external thread of the disc; 17 disc handrail; 18 ring-shaped motor; 19 internal thread; 20 ring-shaped rotating shaft; 21 cutter head; 22 drill rod slurry nozzle; 23 scraper operation track. Specific implementation method

[0015] The present invention will be described below with reference to the drawings.

[0016] Refer to Figure 1 and Figure 2 , the present invention provides an anti-clogging device for periodically cleaning the channel and its surroundings of the drill rod slurry nozzle during the construction of the drill rod of a pile driver. Specifically, the main body of the anti-clogging device of the present invention is divided into two upper and lower components. The upper component consists of a grouting port 1, an air injection port 2, a front pipeline 3 for slurry inflow, a front pipeline 4 for air flow inflow, and an external thread joint 5. The lower component consists of an internal and external thread joint 6, a rear pipeline 9 for slurry outflow, a middle pipeline 10 for air flow, a rear pipeline 11 for air flow out, a double-edge scraper 12, and an air nozzle 13. Among them, the internal and external thread joint 6 is subdivided into an internal thread 7 and an external thread 8 for combining the two upper and lower components of the anti-clogging device of the present invention. The internal and external thread joint 6 of the lower component includes an internal thread 7 and an external thread 8. The internal thread 7 of the internal and external thread joint 6 is matched with the external thread of the external thread joint 5 for fixed connection of the upper and lower components; the external thread 8 is used to fixedly connect the internal and external thread joint 6 to the motor body of the drill rod.

[0017] The external threaded joint 5 of the upper component is provided with two holes. After the upper and lower components are fixedly connected in place, the two ends of one hole respectively correspond to the front-end pipeline 3 for slurry inflow and the rear-end pipeline 9 for slurry outflow, and the two ends of the other hole respectively correspond to the front-end pipeline 4 for air inflow and the middle-end pipeline 10 for air flow.

[0018] Before the construction of the pile driver drill rod, the anti-siltation device of the present invention needs to be installed inside the drill rod. The pile driver drill rod includes a central perforated disc 14 for fixing and allowing the slurry inflow pipeline to pass through. The upper part of the annular motor 18 is designed with an internal thread 19, and the central perforated disc 14 is provided with an external thread that matches the internal thread 19. The central perforated disc 14 is fixedly connected to the annular motor 18. The annular motor 18 drives the pile driver drill rod to rotate through the annular rotating shaft 20. The central perforated disc 14 is provided with an external thread 16 of the disc, a hole in the middle, and an internal thread 15 on the inner surface of the hole. The external thread 16 of the central perforated disc 14 cooperates with the internal thread 19 on the upper part of the annular motor 18. For the convenience of installing the central perforated disc 14, two symmetrical disc handrails 17 are designed on the upper surface of the central perforated disc 14. The internal thread 15 cooperates with the external thread 8 of the internal and external threaded joint 6, and the internal thread 15 is used to fix the anti-siltation device of the present invention on the central perforated disc 14. The annular rotating shaft 20 can transmit the power output from the annular motor 18 to the pile driver drill rod. There is a gap between it and the central perforated disc 14, and their positions are independent and not connected to each other.

[0019] During the construction of the pile driver drill rod, the function of the drill bit cutter head 21 is to dig downward and transport the excess soil upward. When grouting is required, the slurry enters from the grouting port 1, passes through the front-end pipeline 3 for slurry inflow and the rear-end pipeline 9 for slurry outflow, and is injected into the drill rod interior, and finally is ejected from the drill rod nozzle 22. During the rotation of the drill rod, the double-edge scraper 12 on the anti-siltation device of the present invention cleans the inner wall near the drill rod nozzle along the scraper running track 23 at a specific cycle (as Figure 3 shown). When it is necessary to clean the drill rod nozzle channel of the pile driver, the air pump connected to the air injection port 2 starts to work. When the air jet nozzle 13 on the double-edge scraper is not aligned with the drill rod nozzle 22 of the pile driver, the gas is briefly compressed in the pipe; when they are aligned, the high-speed jet of gas effectively removes the mud to ensure the smoothness of the drill rod nozzle 22 channel.

[0020] During the rotation of the drill rod, the anti-siltation device of the present invention is fixed and stationary. When the slurry is placed inside the drill rod, the anti-siltation device of the present invention plays a role in re-stirring the slurry sufficiently.

[0021] Installation method: First, assemble the lower part of the anti-clogging device of the present invention with the central perforated disc; then, twist the disc armrest onto the annular motor through threads, place the upper end of the drill pipe inside the drill pipe, and ensure that the jet nozzle on the anti-clogging device of the present invention is aligned with the height of the slurry injection nozzle of the drill pipe; finally, fix the upper part of the anti-clogging device of the present invention to the internal and external threaded joints of the lower part of the anti-clogging device of the present invention through threaded joints and align the corresponding pipelines one by one.

[0022] Due to the simplicity of the structure and the flexible adaptability and universality of all components, the anti-clogging effect and other mechanical effects of the device can be conveniently analyzed and demonstrated by existing commercial finite element calculation software, so that engineering and technical personnel can flexibly select anti-clogging devices of different sizes and different types of materials for optimal design according to different actual engineering needs.

Claims

1. A device for preventing the nozzle of a pile driver drill rod from being blocked, which is placed inside the drill rod. A scraper running track (23) is arranged around the inner side wall of the drill rod, and the drill rod slurry spraying nozzle (22) is opened on the side wall above the scraper running track (23). It is characterized in that, It includes two interconnected upper and lower components. The upper component consists of a grouting port (1), an air injection port (2), a front-end slurry inflow pipeline (3), a front-end air flow inflow pipeline (4), and an external thread joint (5). The lower component includes an internal and external thread joint (6), a rear-end slurry outflow pipeline (9), a mid-end air flow pipeline (10), a rear-end air flow outflow pipeline (11), a double-edge scraper (12), and a jet nozzle (13). Among them, The internal and external thread joint (6) of the lower component includes an internal thread (7) and an external thread (8). The internal thread (7) of the internal and external thread joint (6) is matched with the external thread of the external thread joint (5) for the fixed connection of the upper and lower components. The external thread (8) is used to fixedly connect the internal and external thread joint (6) to the motor body of the drill pipe. The external thread joint (5) of the upper component is provided with two holes. After the fixed connection of the upper and lower components is in place, the two ends of one hole correspond to the front-end slurry inflow pipeline (3) and the rear-end slurry outflow pipeline (9) respectively, and the two ends of the other hole correspond to the front-end air flow inflow pipeline (4) and the mid-end air flow pipeline (10) respectively. The mid-end air flow pipeline (10) and the rear-end air flow outflow pipeline (11) form an inverted T-shaped connection in the middle. A scraper is provided at each end of the rear-end air flow outflow pipeline (11) to form a double-edge scraper (12). The arc of the outer surface of the scraper is consistent with the inner wall of the drill pipe, and a jet nozzle (13) is provided. The two scrapers are placed on the scraper running track (23). When the drill pipe rotates, the jet nozzle (13) and the drill pipe slurry injection nozzle (22) are either aligned or misaligned.

2. The device for preventing nozzle clogging of the drill pipe of a pile driver according to claim (1), characterized in that, The mid-end air flow pipeline (10) and the rear-end air flow outflow pipeline (11) are rigid components.

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