CN-117721800-B - Inner cutter device and construction method

CN117721800BCN 117721800 BCN117721800 BCN 117721800BCN-117721800-B

Abstract

The invention discloses an internal cutting device and a construction method, which belong to the field of tubular pile construction and comprise a drill rod, an internal supporting device, a connector and an internal cutting device, wherein one end of the drill rod is connected with a drilling machine, the other end of the drill rod is fixedly connected with the internal cutting device through the connector, the internal supporting device is rotatably arranged on the drill rod, the internal supporting device can be propped against the inner wall of a tubular pile to fix the whole device, the internal cutting device comprises a cylinder, a slide way is arranged in the cylinder, a water passage is arranged in the drill rod, the slide way is communicated with the water passage, a slide core is slidably arranged in the slide way, a plurality of mounting grooves are formed in the outer wall of the cylinder, the mounting grooves are communicated with the slide way, a cutting blade is rotatably arranged in the mounting grooves, and one end of the cutting blade is in transmission connection with the slide core. In the construction process of the method, if the engineering machinery touches the cut pipe pile, the transmission of the impact force of the construction machinery to the pipe pile is blocked at the fracture position, so that the quality problems of pipe pile fracture and the like required under earthwork can not be caused.

Inventors

XU HONGGUANG
WANG YAO
ZHENG HUI
WU LONGSHAN
ZHENG SHOU

Assignees

中建海峡建设发展有限公司

Dates

Publication Date: 20260508
Application Date: 20240130

Claims (4)

1. An endo-cutter device, characterized in that: Comprises a drill rod (1), an inner supporting device (2), a connector (3) and an inner cutting device (4); one end of the drill rod (1) is connected with a drilling machine, the other end of the drill rod (1) is fixedly connected with the internal cutting device (4) through a connector (3), the internal supporting device (2) is rotatably arranged on the drill rod (1), and the internal supporting device (2) can be propped against the inner wall of the tubular pile to fix the whole device; The internal cutting device (4) comprises a cylinder (5), a slide way (6) is arranged in the cylinder (5), a water passage (7) is arranged in the drill rod (1), the slide way (6) is communicated with the water passage (7), a slide core (8) is arranged in the slide way (6) in a sliding manner, and one end, close to the drill rod (1), of the slide core (8) is in sealing fit with the inner wall of the slide way (6); A plurality of mounting grooves (9) are formed in the outer wall of the cylinder (5), the mounting grooves (9) are communicated with the slide way (6), a cutting blade (10) is rotatably mounted in the mounting grooves (9), and one end of the cutting blade (10) is in transmission connection with the slide core (8); the slideway (6) comprises a front cavity (11), a middle cavity (12) and a rear cavity (13); the sliding core (8) comprises a pushing block (14) and a sliding rod (15); The pushing block (14) is slidably mounted in the front cavity (11), the sliding rod (15) is positioned in the middle cavity (12) and the rear cavity (13), and the outer wall of the pushing block (14) is attached to the inner wall of the front cavity (11); a reset spring (16) is arranged in the middle cavity (12), the reset spring (16) is sleeved on the sliding rod (15), one end of the reset spring (16) is abutted to one end of the pushing block (14), and the other end of the reset spring (16) is abutted to one end of the middle cavity (12); The sliding core (8) is also provided with a pressure relief channel (17), the top end of the pressure relief channel (17) is communicated with the front cavity (11), the bottom end of the pressure relief channel (17) is provided with a drainage hole (18), and the pressure relief channel (17) is communicated with the outside through the drainage hole (18); The water outlet direction of the drainage hole (18) is inclined upwards; a placing groove (19) is formed in the pushing block (14), a pressurizing block (20) is embedded in the placing groove (19), and a conical pressurizing hole (21) is formed in the pressurizing block (20); One end of the outer wall of the cylinder (5) close to the drill rod (1) is provided with a front end mounting head (24), one end of the front end mounting head (24) is connected to the inner wall of the slideway (6) in a threaded manner, the other end of the front end mounting head (24) is connected with the connector (3) in a threaded manner, and a connecting channel (25) penetrating through two ends is formed in the front end mounting head (24); A filter plate (26) is arranged on the inner side of the connecting channel (25).
2. The endo-knife device according to claim 1, characterized in that: The surface of the sliding rod (15) is provided with first gear teeth (22) which are arranged along the length direction of the sliding rod (15) at the mounting groove (9), and the head of the cutting blade (10) is provided with second gear teeth (23) which are meshed with the first gear teeth (22).
3. The endo-knife device according to claim 1, characterized in that: The one end that drum (5) kept away from drilling rod (1) is equipped with rear end installation head (27), threaded connection has drill bit (28) on rear end installation head (27).
4. A construction method using the internal cutter device according to any one of claims 1 to 3, characterized by comprising the steps of: S1, after the drill rod (1), the inner supporting device (2), the connector (3) and the inner cutting device (4) are assembled, connecting the device with a drilling machine; S2, placing the inner cutter device into the tubular pile through the suspension device, and in the placing process, rotating the drilling machine at a low speed to place the inner cutter device at a cutting point; S3, injecting high-pressure water of 0.5MPa into the drill rod (1) of the inner cutter device, enabling the inner supporting device (2) to prop against the inner wall of the tubular pile, and enabling the drilling machine to continuously rotate at a low speed until the drill rod (1) runs stably; s4, after the drill rod (1) runs stably, high-pressure water is regulated to 1-2MPa, so that a cutting blade (10) of the inner cutting device (4) is opened, the rotating speed of a drilling machine is regulated, and the tubular pile is cut rapidly; S5, when the pressure of the water pressure gauge is suddenly reduced or the water level in the inner cavity of the pipe pile is suddenly reduced, the pipe pile is cut off, high-pressure water is cut off, the cutting blade (10) is retracted, the inner supporting device (2) is reset, and the inner cutter device is retracted.

Description

Inner cutter device and construction method Technical Field The invention relates to the field of tubular pile construction, in particular to an inner cutter device and a construction method. Background The tubular pile construction is commonly adopted in the building construction, the load of an upper building is transferred to a soil layer with a strong bearing capacity in depth, or a weak soil layer is compacted to improve the bearing capacity and compactness of foundation soil, so that the quality of the tubular pile construction is ensured, and the stability of the building is improved. The tubular pile is generally precast pile, and general tubular pile length all is greater than the tubular pile and sinks the ground layer degree of depth in the actual construction, needs to cut the tubular pile to the construction design height. Cutting overlong tubular pile in traditional construction, cleaning soil layer outside the tubular pile to the horizontal elevation required by construction, and cutting the tubular pile from the outside. In the construction process, cleaning is carried out to the pipe pile cutting surface in-process, the pipe pile is broken if the construction machinery is adopted and is touched with the pipe pile, the pipe pile is cut outside, large-scale cutting mechanical equipment is required to be designed, and the construction process is complex. Disclosure of Invention In order to overcome the defects of the prior art, the invention aims to provide an internal cutting device and a construction method, which are used for cutting a tubular pile from a pipe, so that the problem that the tubular pile is broken and needs to be reworked in the traditional tubular pile cutting process is solved, and the tubular pile cutting construction efficiency and construction quality are improved. To achieve the purpose, the invention adopts the following technical scheme: The invention provides an inner cutting device which comprises a drill rod, an inner supporting device, a connector and an inner cutting device, wherein one end of the drill rod is connected with a drilling machine, the other end of the drill rod is fixedly connected with the inner cutting device through the connector, the inner supporting device is rotatably arranged on the drill rod and can be propped against the inner wall of a tubular pile to fix the whole device, the inner cutting device comprises a cylinder, a slide way is arranged in the cylinder, a water passage is arranged in the drill rod, the slide way is communicated with the water passage, a slide core is slidably arranged in the slide way, one end of the slide core, which is close to the drill rod, is in sealing fit with the inner wall of the slide way, a plurality of mounting grooves are formed in the outer wall of the cylinder, the mounting grooves are communicated with the slide way, a cutting blade is rotatably arranged in the mounting grooves, and one end of the cutting blade is in transmission connection with the slide core. The sliding way comprises a front cavity, a middle cavity and a rear cavity, the sliding core comprises a pushing block and a sliding rod, the pushing block is slidably arranged in the front cavity, the sliding rod is positioned in the middle cavity and the rear cavity, the outer wall of the pushing block is attached to the inner wall of the front cavity, a reset spring is arranged in the middle cavity and sleeved on the sliding rod, one end of the reset spring is abutted to one end of the pushing block, and the other end of the reset spring is abutted to one end of the middle cavity. The preferable technical scheme of the invention is that the sliding core is also provided with a pressure relief channel, the top end of the pressure relief channel is communicated with the front cavity, the bottom end of the pressure relief channel is provided with a drainage hole, and the pressure relief channel is communicated with the outside through the drainage hole. The preferable technical scheme of the invention is that the water outlet direction of the drain hole is inclined upwards. The preferable technical scheme of the invention is that a placing groove is formed in the pushing block, a pressurizing block is embedded in the placing groove, and a conical pressurizing hole is formed in the pressurizing block. The preferable technical scheme of the invention is that first gear teeth which are arranged along the length direction of the sliding rod are arranged on the surface of the sliding rod at the position of the mounting groove, and second gear teeth which are meshed with the first gear teeth are arranged on the head part of the cutting blade. The technical scheme of the invention is that a front end mounting head is arranged at one end of the outer wall of the cylinder, which is close to a drill rod, one end of the front end mounting head is connected to the inner wall of the slideway in a threaded manner, the other end of the front end mounting hea