A multi-channel drill pipe with a monitoring function

Abstract

A multi-channel drill pipe with a monitoring function, comprising a drill pipe body having a male joint, a female joint and an upper slurry spraying port, an internal pipeline and an inclinometer; a first slurry pipe, a second slurry pipe and an air pipe of the internal pipeline are arranged in the inner cavity of the drill pipe in such a way that their cross-sections are equilateral triangles and their axial directions are parallel to each other, and the first slurry pipe is connected to the upper slurry spraying port; the inclinometer is fixedly installed on the outer wall of the drill pipe below the upper slurry spraying port; the sensor is fixedly installed on the plate support, and the external control cable is inserted into the air pipe and then connected to the sensor in the inner cavity of the drill pipe. The invention can monitor the rotation deflection degree of the drill pipe in real time and prompt the operator to take measures, ensuring the consistency of the strength of the mixing pile pile body up and down and the vertical accuracy, and improving the construction efficiency and engineering quality.

Description

Technical Field

[0001] The present invention relates to a multi-channel drill pipe with a monitoring function, and particularly to a cement-soil mixing pile drill for the construction of an underground water-stop curtain wall, the excavation and support of a foundation pit, the anti-seepage treatment of a dam, and the improvement of a foundation. Background Art

[0002] At present, the cement mixing pile construction process is widely used in the basic construction of industrial and urban construction. Through a special multi-shaft soil mixing drill, during the process of the drill pipe drilling and lifting, a cement slurry curing agent is sprayed from the front end of the drill bit, and is forcibly mixed with loose soil, sand and gravel and the curing agent to construct a cement-soil mixing reinforced foundation with integrity, water stability and certain strength. A large number of construction cases show that there are great differences in the internal homogeneity of the pile body during its formation process, and the quality of the upper pile body of the cement-soil mixing pile is better than that of the lower part.

[0003] The existing cement-soil mixing pile drills generally adopt the method of spraying slurry and air at the bottom of the drill bit. As the drilling depth increases continuously, due to the large confining pressure of the soil on the drill bit, the resistance of the slurry spraying is large, resulting in insufficient cement slurry in the surrounding soil, and it is difficult to ensure the uniform mixing of the cement slurry and the soil, thus affecting the homogeneous performance of the pile body. In order to improve the homogeneous performance of the upper and lower parts of the pile body after the cement-soil mixing pile is drilled and stirred, ensure the consistency of the upper and lower quality of the pile body, and improve the vertical accuracy requirements of the wall after pile formation, it is necessary to make necessary technical improvements to the drill pipe and drill bit structures. A multi-channel pipeline is arranged in the inner cavity of the drill pipe and its drill bit to ensure that slurry and air are sprayed to the surrounding soil simultaneously during the mixing process, and slurry is sprayed to the surrounding soil at different stages when the drill pipe and its drill tool are drilling down and lifting up to promote the mixing of the surrounding soil and the cement slurry. By setting a drill pipe inclinometer to monitor the deflection of the drill pipe during rotary drilling, the operator is prompted to take corrective measures to ensure the vertical accuracy of the upper and lower parts of the wall after the mixing pile is formed, thereby improving the construction quality and construction efficiency of the mixing pile drill and greatly reducing the construction cost of the mixing pile. Summary of the Invention

[0004] The main purpose of the present invention is to overcome the shortcomings of the existing mixing drills, and provide a multi-channel drill pipe with a monitoring function and an internal slurry pipe and air pipe, which realizes spraying slurry to the surrounding soil at different stages when the drill pipe and its drill tool are drilling down and lifting up to promote the full mixing of the surrounding soil and the cement slurry, so as to achieve the same strength of the upper and lower parts of the pile body after pile formation; by monitoring the deflection of the drill pipe during rotary drilling through an inclinometer, the operator is prompted to take corrective measures, greatly shortening the construction period and saving the construction cost.

[0005] The present invention is realized through the following technical solutions:

[0006] A multi-channel drill pipe with a monitoring function, comprising: a drill pipe body having a male connector, a female connector and an upper slurry spraying port, an internal pipeline having a first slurry pipe, a second slurry pipe, an air pipe and a plurality of pipeline brackets, and an inclinometer, wherein:

[0007] The male connector includes a male fixing plate located on its upper end face and having a male plate through-hole;

[0008] The female connector includes a female fixing plate located at the bottom of its inner groove and having a female plate through-hole;

[0009] The inclinometer includes an arc plate, a plate support and a sensor;

[0010] It is characterized in that:

[0011] The male fixing plate of the male connector of the drill pipe body is provided with three male plate through-holes, and the three male plate through-holes are arranged symmetrically in an equilateral triangle in the radial direction of the male fixing plate; the female fixing plate of the female connector is provided with three female plate through-holes, and the three female plate through-holes are arranged symmetrically in an equilateral triangle in the radial direction of the female fixing plate; the upper slurry spraying port of the drill pipe body is arranged on the outer wall of the drill pipe body;

[0012] The internal pipeline is arranged in the inner cavity of the drill pipe body through a plurality of pipeline brackets; the first slurry pipe, the second slurry pipe and the air pipe of the internal pipeline are arranged in the inner cavity of the drill pipe body in a way that their cross-sectional directions are symmetrically arranged in an equilateral triangle and are parallel to each other; the first slurry pipe is connected to the upper slurry spraying port through a short elbow pipe on the inner wall of the drill pipe body; the pipeline bracket is provided with three pipe rack through-holes arranged symmetrically in an equilateral triangle in its radial direction;

[0013] The first slurry pipe, the second slurry pipe and the air pipe respectively pass through the three pipe rack through-holes of a plurality of pipeline brackets and are fixed in the inner cavity of the drill pipe body; the upper ends of the first slurry pipe, the second slurry pipe and the air pipe are respectively placed in the three male plate through-holes of the male fixing plate and then welded and fixed, and the male fixing plate is welded and fixed in the sunken pit on the end face of the male connector; the lower ends of the second slurry pipe and the air pipe are placed in the two female plate through-holes of the female fixing plate and then welded and fixed, and the female fixing plate is welded and fixed at the bottom of the inner groove of the female connector;

[0014] The inclinometer is fixedly installed on the outer wall of the drill pipe body below the upper slurry spraying port through the arc plate; the plate support is located inside the arc plate; the sensor is fixedly installed on the plate support, and the external control cable is inserted from the upper end of the air pipe and passes out of the air pipe near the plate support in the inner cavity of the drill pipe body and then connects the sensor;

[0015] In the present invention, it can be that the perpendicularity deviation between the outer end face of the male fixing plate of the drill pipe body, the outer end face of the female fixing plate of the female connector and the axial center line of the drill pipe body is 0.08 - 0.10 mm. Description of the Drawings

[0016] Figure 1Schematic diagram of a multi-channel drill pipe with a monitoring function according to the present invention;

[0017] Figure 2 is Figure 1 the top view of;

[0018] Figure 3 is Figure 1 the bottom view of;

[0019] Figure 4 is Figure 2 the sectional view taken along line A-A in; Specific embodiments

[0020] The multi-channel drill pipe with a monitoring function according to the present invention will be further described below with reference to the accompanying drawings.

[0021] A multi-channel drill pipe with a monitoring function includes: a drill pipe body 10 having a male connector 101, a female connector 102, and an upper grouting port 103, an internal pipeline 20 having a first slurry pipe 201, a second slurry pipe 202, an air pipe 203, and a plurality of pipeline racks 204, and an inclinometer 40. The male connector 101 includes a male fixing plate 1011 located on its upper end surface and having a male plate through hole 1012; the female connector 102 includes a female fixing plate 1021 located at the bottom of its inner groove and having a female plate through hole 1022; the inclinometer 40 includes an arc plate 401, a plate support 402, and a sensor 403; wherein:

[0022] There are three male plate through holes 1012 provided in the male fixing plate 1011 of the male connector 101 of the drill pipe body 10, and the three male plate through holes 1012 are arranged symmetrically in an equilateral triangle in the radial direction of the male fixing plate 1011; there are three female plate through holes 1022 provided in the female fixing plate 1021 of the female connector 102, and the three female plate through holes 1022 are arranged symmetrically in an equilateral triangle in the radial direction of the female fixing plate 1021; the upper grouting port 103 of the drill pipe body 10 is provided on the outer wall of the drill pipe body 10.

[0023] The built-in pipeline 20 is arranged in the inner cavity of the drill pipe body 10 through a plurality of pipeline brackets 204; the first slurry pipe 201, the second slurry pipe 202, and the air pipe 203 of the built-in pipeline 20 are arranged in the inner cavity of the drill pipe body 10 in a way that their cross-sectional directions are symmetric as an equilateral triangle and their axes are parallel to each other; the first slurry pipe 201 is connected to the upper slurry spraying port 103 through a short elbow pipe 2011 on the inner wall of the drill pipe body 10; the pipeline bracket 204 is provided with three pipe bracket through holes 2041 arranged symmetrically as an equilateral triangle in its radial direction. When the drill pipe body and the external drill bit connected to its lower part are drilling downward and lifting and stirring, the operator can control the slurry spraying at two positions of the slurry spraying port at the slurry spraying port and the external drill bit connected to its lower part through the construction control system to spray slurry simultaneously up and down, and spray compressed air through the air spraying port at the external drill bit, ensuring the full and uniform stirring of the soil around the drill pipe and the drill bit with the cement slurry, achieving the consistency of the homogeneity and strength of the pile body up and down, and greatly improving the construction quality of the mixing pile.

[0024] The first slurry pipe 201, the second slurry pipe 202, and the air pipe 203 respectively pass through the three pipe bracket through holes 2041 of the plurality of pipeline brackets 204 and are fixed in the inner cavity of the drill pipe body 10; the upper ends of the first slurry pipe 201, the second slurry pipe 202, and the air pipe 203 are respectively placed in the three male circle through holes 1012 of the male fixing plate 1011 and then welded and fixed, and the male fixing plate is welded and fixed in the end face pit of the male joint 101; the lower ends of the second slurry pipe 202 and the air pipe 203 are placed in the two female plate through holes 1022 of the female fixing plate 1021 and then welded and fixed, and the female fixing plate is welded and fixed at the bottom of the inner groove of the female joint 102. The perpendicularity deviation between the outer end face of the male fixing plate 1011 of the male joint 101 of the drill pipe body 10 and the outer end face of the female fixing plate 1021 of the female joint 102 and the axial center line of the drill pipe body 10 is 0.08 - 0.10 mm. In this way, when connecting the external drill pipe and the drilling tool above and below the drill pipe body respectively, it is convenient for the installation and positioning of the sealing gasket, ensuring the uniform force distribution in the compressed state, effectively improving the sealing performance at the drill pipe joint, preventing slurry leakage, liquid leakage, and air leakage, and greatly improving the safety performance of the drilling construction.

[0025] The inclinometer 40 is fixedly installed on the outer wall of the drill pipe body 10 below the upper slurry spraying port 103 through the arc-shaped plate 401; the plate support 402 is located inside the arc-shaped plate 401; the sensor 403 of the inclinometer 40 is fixedly installed on the plate support 402, and the external control cable is inserted from the upper end of the air pipe 203 and passes through the air pipe 203 near the plate support 402 in the inner cavity of the drill pipe body 10 and then connects to the sensor. When the drill pipe body drills downward and performs upward stirring operation with the external drill tool connected below, the sensor 403 of the inclinometer 40 and the upper sensor installed at the external reducer on the upper part of the drill pipe body immediately monitor the central deflection degree during the rotation of the drill pipe, and transmit it to the operation control system through the cable, so as to facilitate the operator to take corresponding deviation correction measures, thereby meeting the vertical accuracy requirements for the drilling and pile forming of the mixing pile drill.

[0026] When an external drill pipe is connected above the male joint 101 of the drill pipe body 10, a sealing gasket is arranged between the outer end face of the male fixing plate 1011 of the male joint 101 and the female joint of the external drill pipe above, and the male joint 101 of the lower drill pipe body 10 and the female joint of the external drill pipe above are locked by an external pin shaft to complete the docking between the drill pipe body 10 and the external drill pipe.

[0027] The multi-channel drill pipe of the present invention with a monitoring function effectively monitors and transmits the deflection degree during the rotation of the drill pipe through the inclinometer arranged on the outer wall of the drill pipe, facilitating the operator to take deviation correction measures to ensure that the vertical accuracy after the mixing drill forms a wall meets the design requirements. A plurality of slurry pipes, air pipes and slurry spraying ports are arranged in the inner cavity of the drill pipe body to ensure that slurry and air are sprayed into the surrounding soil simultaneously during the mixing process, and slurry is sprayed into the surrounding soil at different stages when the drill pipe body is lowered and lifted along with the external drill pipe and drill tool, so as to promote the full mixing of the surrounding soil and the cement slurry, making the homogeneity and strength of the pile body consistent up and down after the drilling and mixing to form a pile. Thereby improving the construction quality and progress of the mixing pile, improving the construction efficiency and reducing the construction cost.

[0028] Without departing from the general concept of the present invention, various transformations and improvements can also be made to the present invention, but as long as they are the same as or equivalent to the present invention, they also belong to the protection scope of the present invention.

Claims

1. A multi-channel drill pipe with a monitoring function, comprising: The drill pipe body (10) having a male connector (101), a female connector (102) and an upper grouting port (103), the built-in pipeline (20) having a first slurry pipe (201), a second slurry pipe (202), an air pipe (203) and a plurality of pipeline racks (204), and an inclinometer device (40), wherein: The male connector (101) includes a male fixing plate (1011) located on its upper end face and having a male plate through-hole (1012); The female connector (102) includes a female fixing plate (1021) located at the bottom of its inner groove and having a female plate through-hole (1022); The inclinometer device (40) includes an arc plate (401), a plate support (402) and a sensor (403); It is characterized in that: There are three male plate through-holes (1012) in the male fixing plate (1011) of the male connector (101) of the drill pipe body (10), and the three male plate through-holes (1012) are arranged in an equilateral triangle geometric symmetry manner in the radial direction of the male fixing plate (1011); there are three female plate through-holes (1022) in the female connector (102), and the three female plate through-holes (1022) are arranged in an equilateral triangle symmetry manner in the radial direction of the female fixing plate (1021); the upper grouting port (103) of the drill pipe body (10) is arranged on the outer wall of the drill pipe body (10); The built-in pipeline (20) is arranged in the inner cavity of the drill pipe body (10) through a plurality of pipeline racks (204); the first slurry pipe (201), the second slurry pipe (202) and the air pipe (203) of the built-in pipeline (20) are arranged in the inner cavity of the drill pipe body (10) in a manner that their cross-sectional directions are symmetric in an equilateral triangle and are parallel to each other axially; the first slurry pipe (201) is connected to the upper grouting port (103) through a short elbow pipe (2011) on the inner wall of the drill pipe body (10); the pipeline rack (204) is provided with three pipe rack through-holes (2041) arranged in an equilateral triangle symmetry manner in its radial direction; The first slurry pipe (201), the second slurry pipe (202) and the air pipe (203) respectively pass through the three pipe rack through-holes (2041) of the plurality of pipeline racks (204) and are fixed in the inner cavity of the drill pipe body (10); the upper ends of the first slurry pipe (201), the second slurry pipe (202) and the air pipe (203) are respectively placed in the three male plate through-holes (1012) of the male fixing plate (1011) and then welded and fixed, and the male fixing plate is welded and fixed on the end face of the male connector (101); the lower ends of the second slurry pipe (202) and the air pipe (203) are placed in the two female plate through-holes (1022) of the female fixing plate (1021) and then welded and fixed, and the female fixing plate is welded and fixed at the bottom of the inner groove of the female connector (102); The inclinometer device (40) is fixedly installed on the outer wall of the drill pipe body (10) below the upper grouting port (103) through the arc plate (401); the plate support (402) is located inside the arc plate (401); the sensor (403) is fixedly installed on the plate support (402), and the external control cable is inserted from the upper end of the air pipe (203) and passes out of the air pipe (203) near the plate support (402) in the inner cavity of the drill pipe body (10) and then connects to the sensor.

2. The multi-channel drill pipe according to claim 1, wherein The perpendicularity deviation between the outer end face of the male fixing plate (1011) of the male joint (101) of the drill pipe body (10), the outer end face of the female fixing plate (1021) of the female joint (102) and the axial center line of the drill pipe body (10) is 0.08 - 0.10 mm.

Images