A drill pipe guide

Abstract

The present application relates to a kind of drill rod centralizer, including centralizing ring, the diameter of centralizing ring is slightly smaller than drill bit diameter, and fixed section is coaxially arranged above and below the centralizing ring, and fixed section is used to be coaxially fixed on drill pipe;The outer periphery of fixed section is evenly provided with multiple hinge lug I, and the inner periphery of centralizing ring is provided with upper and lower two groups of hinge lug II, and the number of each group of hinge lug II is equal to the number of hinge lug I on each fixed section;It also includes several connecting steel plates, the first end of connecting steel plate is hinged with hinge lug I, and the second end of connecting steel plate is hinged with hinge lug II, and the hinged structure is the hinged mode of convenient disassembly and assembly;When using, centralizing ring is coaxial with drill bit, and the present centralizer is lowered into hole with drill pipe, and centralizing ring is a certain distance from drill bit, when drill bit drives drill pipe to deflect, centralizing ring contacts with hole wall, and the deflection of drill pipe is forcedly controlled, the purpose of centralizing is achieved, the shortcoming that active centralizer occupies orifice platform space is overcome, and the structure is simple, and disassembly and assembly are convenient.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of bored pile engineering technology, in particular to a drill rod guiding device. BACKGROUND

[0002] Bored pile refers to a pile formed by forming a pile hole in the ground by mechanical drilling on the construction site, and placing a reinforcement cage and pouring concrete in it.

[0003] Bored pile was first introduced in the United States in the early 1940s with the development of high-power drilling equipment. In China, bored piles were first used in the early 1960s, first in bridge and port construction. Today, with the rapid development of science and technology, bored piles are widely used in high-rise, super high-rise buildings and heavy structures, and the design and construction level has made great progress.

[0004] Bored piles have the advantages of small environmental and surrounding building damage during construction, large pile diameter, deep soil penetration, wide application stratum, simple and portable construction equipment, etc. In the late 1980s and early 1990s, bored piles developed rapidly and were popularized in all provinces, cities and autonomous regions across the country, hundreds of large and medium-sized cities and development zones, mainly applied to various types of foundations including soft soil, expansive soil and other special soils.

[0005] The construction of bored piles has two methods, mud protection and full casing construction, due to the different selected protection walls. Rotary drill and submersible drill are two common construction equipment for mud protection bored pile. Rotary drill or submersible drill mainly relies on the drill bit to guide and control the verticality deviation of the pile hole during drilling construction. However, due to the limited guiding ability of the drill bit, the pile hole is prone to deviation. When the deviation is large, the reinforcement cage cannot be placed in place, and in severe cases, the guide pipe cannot be lowered, resulting in quality problems or quality accidents. SUMMARY

[0006] The technical problem to be solved by the present application is to make up for the shortcomings of the prior art and provide a drill rod guiding device.

[0007] To solve the above technical problems, the present application is realized by the following technical scheme:

[0008] A drill rod guide device, comprising a guide steel ring, the diameter of the guide steel ring is slightly smaller than or equal to the diameter of a drill bit, and coaxial fixing joints are arranged above and below the guide steel ring; the inner diameter of the fixing joint is equivalent to the outer diameter of the drill rod, and the fixing joint is coaxially fixed on the drill rod; a plurality of hinge ears I are uniformly arranged on the outer periphery of the fixing joint, and the inner periphery of the guide steel ring is provided with two groups of hinge ears II, the number of each group of hinge ears II is equal to the number of hinge ears I on each fixing joint; further comprising a plurality of connecting steel plates, the first end of the connecting steel plate is hingedly connected with the hinge ear I, and the second end of the connecting steel plate is hingedly connected with the hinge ear II, and the hinge connection structure is a hinge connection mode facilitating disassembly and assembly; in use, the guide steel ring is coaxial with the drill bit.

[0009] Further, a plurality of adjusting and fastening threaded holes are arranged on the side wall of the fixing joint, and an adjusting and fastening bolt is matched with the adjusting and fastening threaded hole; the adjusting and fastening bolt is tightened to press the drill rod, so that the fixing joint is fixed on the drill rod; when the adjusting and fastening bolt is loosened, the fixing joint is disconnected from the fixed connection relationship with the drill rod.

[0010] Further, the number of hinge ears I on the fixing joint is 4, and the number of the two groups of hinge ears II of the guide steel ring is 4.

[0011] Further, the adjusting and fastening threaded hole comprises two groups of symmetrically distributed two adjusting and fastening threaded holes.

[0012] Further, the fixing joint comprises a pair of symmetrically preformed bodies, and the two preformed bodies are tightly assembled through a connecting hole, a connecting bolt and a nut.

[0013] Further, the convenient disassembly and assembly hinge connection mode of the connecting steel plate with the hinge ear I and the hinge ear II is realized through a connecting bolt.

[0014] The present application can achieve the following beneficial effects:

[0015] (1) The guide device is lowered into the hole together with the drill rod, the guide steel ring has a certain distance from the drill bit, and when the drill bit drives the drill rod to deflect, the guide steel ring contacts the hole wall to forcibly control the deflection of the drill rod, thereby achieving the purpose of guiding and overcoming the defect that the active guide device occupies the hole platform space, and the structure is simple and convenient to disassemble and assemble;

[0016] (2) The guide steel ring is connected with the fixing joint through a convenient disassembly and assembly hinge connection mode, which has the following advantages: first, it is convenient for assembly; second, different sizes of guide steel rings can be replaced to be suitable for different sizes of drill holes; third, different widths of guide steel rings can be replaced according to actual working conditions to make the guiding effect better, and theoretically, the wider the width of the guide steel ring, the larger the contact surface with the hole wall, and the better the guiding effect;

[0017] (3) The fixed connection between the fixed section and the drill pipe is realized by matching the adjusting fastening bolt with the adjusting fastening thread hole, the fixed section and the drill pipe are separated from the fixed connection relation by loosening the adjusting fastening bolt, the up-down position of the fixed section is adjusted up and down, the position of the guide steel ring is adjusted, and the distance between the guide steel ring and the drill bit is adjusted according to the actual situation of the drilling engineering, theoretically, the farther the distance between the guide steel ring and the drill bit, the better the guiding effect;

[0018] (4) The fixed section can be prefabricated in two halves according to the diameter of the drill pipe, which greatly facilitates the disassembly and assembly work;

[0019] (5) It can be applied to rotary drilling machines, submersible drilling machines and other circular and square drill pipes of different types and diameters, and is matched with different types of drill bits of rotary drilling machines, submersible drilling machines and the like;

[0020] (6) The guide device can be used in multiple combinations, theoretically, the more the number of guide devices, the better the guiding effect. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is the perspective view of the embodiment of the present application Figure I ;

[0022] Figure 2 is the perspective view of the embodiment of the present application Figure II ;

[0023] Figure 3 is the front view of the embodiment of the present application;

[0024] Figure 4 is the left view of the embodiment of the present application;

[0025] Figure 5 is the top view of the embodiment of the present application;

[0026] Figure 6 is the perspective view of the connection between the fixed section and the hinge ear I in the embodiment of the present application;

[0027] Figure 7 is the top view of the connection between the fixed section and the hinge ear I in the embodiment of the present application;

[0028] Figure 8 is the front view of the connection between the fixed section and the hinge ear I in the embodiment of the present application;

[0029] Figure 9 is the perspective view of the connection between the guide steel ring and the hinge ear II in the embodiment of the present application;

[0030] Figure 10 is the top view of the connection between the guide steel ring and the hinge ear II in the embodiment of the present application;

[0031] Figure 11is Figure 10 a sectional view A-A of the present application;

[0032] Figure 12 is a schematic diagram of the application of the embodiment of the present application;

[0033] In the figure: 1 - fixed section, 101 - adjustment fastening screw hole, 102 - connecting hole, 2 - hinge ear I, 201 - connecting bolt hole I, 3 - connecting bolt I, 4 - connecting steel plate, 5 - connecting bolt II, 6 - hinge ear II, 601 - connecting bolt hole II, 7 - guide steel ring, 8 - connecting bolt, 9 - nut, 10 - adjustment fastening bolt, 11 - drill rod, 12 - drill bit. DETAILED DESCRIPTION

[0034] The present application will be further described in detail below in combination with the drawings and specific embodiments. EMBODIMENT

[0035] As Figures 1-5 shown, a drill rod guide device includes a guide steel ring 7, the diameter of the guide steel ring 7 is slightly smaller than or equal to the diameter of a drill bit, and the guide steel ring 7 is coaxially provided with a fixed section 1 above and below; the inner diameter of the fixed section 1 is equivalent to the outer diameter of a drill rod 11, and is used to be coaxially fixed on the drill rod 11; the outer periphery of the fixed section 1 is uniformly fixed and welded with four hinge ears I 2, and the inner periphery of the guide steel ring 7 is welded with two groups of hinge ears II 6, the number of each group of hinge ears II 6 is four, and they are circumferentially distributed; it also includes eight connecting steel plates 4, the first end of the connecting steel plate 4 is hinged with the hinge ear I 2, and the second end of the connecting steel plate 4 is hinged with the hinge ear II 6, and the hinge structure is a hinge structure convenient for disassembly and assembly, in this embodiment, the hinge structure convenient for disassembly and assembly of the connecting steel plate 4 with the hinge ear I 2 and the hinge ear II 6 is achieved through a connecting bolt, that is, the hinge ear I 2 is provided with a connecting bolt hole I 201, the first end of the connecting steel plate 4 is connected with the hinge ear I 2 through the connecting bolt hole I 201 and the connecting bolt I 3 to achieve the hinge structure convenient for disassembly and assembly; the hinge ear II 6 is provided with a connecting bolt hole II 601, and the second end of the connecting steel plate 4 is connected through the connecting bolt hole II 601 and the connecting bolt II 5 to achieve the hinge structure convenient for disassembly and assembly; when in use, the guide steel ring 7 is coaxial with the drill bit 12.

[0036] The side wall of the fixed section 1 is provided with two groups of symmetrically distributed adjustment fastening screw holes 101, each group includes two circumferentially distributed adjustment fastening screw holes 101, and an adjustment fastening bolt 10 is used in matching with the adjustment fastening screw hole 101, and the adjustment fastening bolt 10 is tightened to be used for clamping the drill rod 11, so that the fixed section 1 is fixed on the drill rod 11; when the adjustment fastening bolt 10 is loosened, the fixed section 1 is disconnected from the fixed connection relationship with the drill rod 11.

[0037] The fixed joint 1 comprises a pair of symmetrical prefabricated bodies which are fastened and assembled through the connecting hole 102, connecting bolt 8 and nut 9. The pair of symmetrical prefabricated bodies are prefabricated according to the diameter of the drill pipe and are divided into two halves, which greatly facilitates the disassembly and assembly work.

[0038] The use of the embodiment is as follows:

[0039] (1) The upper and lower fixed joints 1 are fixed to the drill pipe 11, and the fixed positions are determined according to actual needs;

[0040] (2) The hinge ears II on the guide steel ring 7 are all hingedly connected to the connecting steel plates 4;

[0041] (3) The guide steel ring 7 is sleeved on the outer periphery of the drill pipe 11, and the connecting steel plates 4 hingedly connected thereto are respectively hingedly connected to the appropriate hinge ears I 2 on the fixed joints 1;

[0042] (4) The positions of the fixed joints 1 are adjusted up and down according to actual conditions until the construction requirements are met;

[0043] (5) The adjusting and fastening bolts 10 are tightened to tightly abut against the drill pipe 11, so that the fixed joints 1 are fixedly connected to the drill pipe 11;

[0044] (6) Finally, the drill pipe 11 is fixedly connected with the drill bit 12, and then drilling construction can be carried out.

[0045] The advantages of the embodiment are as follows:

[0046] (1) The guide device is lowered into the hole together with the drill pipe 11, and the guide steel ring 7 has a certain distance from the drill bit 12. When the drill bit 12 drives the drill pipe 11 to deviate, the guide steel ring 7 contacts the hole wall to forcibly control the deviation of the drill pipe 11, so as to achieve the purpose of guiding and overcome the shortcoming that the active guide device occupies the space of the hole platform. The structure is simple and convenient to disassemble and assemble;

[0047] (2) The guide steel ring 7 is connected to the fixed joint 1 through the hinge connection mode which is convenient to disassemble and assemble. First, it is convenient to assemble; second, different sizes of the guide steel ring 7 can be replaced to be suitable for different sizes of drilling holes; third, different widths of the guide steel ring 7 can be replaced according to actual working conditions, so that the guiding effect is better. In theory, the wider the width of the guide steel ring 7, the larger the contact surface with the hole wall, and the better the guiding effect;

[0048] (3) the fixed connection between the fixed section 1 and the drill pipe 11 is realized by matching the adjusting fastening bolt 10 with the adjusting fastening screw hole 101, the fixed section 1 and the drill pipe 11 are disconnected by loosening the adjusting fastening bolt 10, the up and down position of the fixed section 1 is adjusted, the position of the guide steel ring 7 is adjusted, the distance between the guide steel ring 7 and the drill bit 12 is adjusted according to the actual situation of the drilling project, theoretically, the farther the distance between the guide steel ring 7 and the drill bit 12, the better the guiding effect is;

[0049] (4) the fixed section 1 can be prefabricated in two halves according to the diameter of the drill pipe 11, which greatly facilitates the disassembly and assembly work;

[0050] (5) by reasonably designing the structure of the fixed section 1, it is suitable for different types and different diameters of drill pipes of rotary drilling machines, submersible drilling machines and the like, and is matched with different types of drill bits of rotary drilling machines, submersible drilling machines and the like;

[0051] (6) according to the actual needs, more than one guide device can be used in combination, theoretically, the more the number of guide devices, the better the guiding effect is.

[0052] In the description of the present application, the words indicating the orientation or position relationship such as "inner", "outer", "upper", "lower", "front", "back" and the like are only for the convenience of describing the present application, and are not indicative or suggestive of the device or element indicated must have a specific orientation, be constructed and operated in a specific orientation, therefore, cannot be understood as a limitation to the present application.

[0053] The above is only one embodiment of the present application, the protection scope of the present application is not limited to the above embodiment, it should be pointed out that, for ordinary skilled in the art, without departing from the idea of the present application, some improvements and refinements made are within the protection scope of the present application.

Claims

1. A drill pipe centralizer characterized by: The application relates to a guide ring (7) which is coaxial with a drill bit (12) during use, and the guide ring (7) is provided with a fixing section (1) coaxially arranged above and below the guide ring (7); the inner diameter of the fixing section (1) is equivalent to the outer diameter of a drill rod (11) and the fixing section (1) is coaxially arranged on the drill rod (11); a plurality of hinge ears I (2) are uniformly arranged on the outer periphery of the fixing section (1) and a plurality of hinge ears II (6) are arranged on the inner periphery of the guide ring (7); the number of the hinge ears II (6) is equivalent to the number of the hinge ears I (2) on each fixing section (1); a plurality of connecting steel plates (4) are arranged, the first end of the connecting steel plate (4) is hingedly connected with the hinge ear I (2), the second end of the connecting steel plate (4) is hingedly connected with the hinge ear II (6), and the hinge connection structure is convenient to disassemble and assemble; during use, the guide ring (7) is coaxial with the drill bit (12). The fixing section (1) comprises a pair of symmetrical prefabricated bodies which are tightly assembled through a connecting hole (102), a connecting bolt (8) and a nut (9). The convenient disassembly and assembly hinge connection between the connecting steel plate (4) and the hinge ear I (2) and the hinge ear II (6) is realized through a connecting bolt; the first aspect is convenient to assemble; the second aspect is suitable for different sizes of drill holes by replacing guide rings (7) with different diameters; the third aspect is that the guide ring (7) can be replaced according to actual working conditions, and the wider the guide ring (7) is, the larger the contact surface with the hole wall is, and the better the guiding effect is.

2. The drill pipe centralizer of claim 1 wherein: A plurality of adjusting fastening screw holes (101) are arranged on the side wall of the fixing section (1), an adjusting fastening bolt (10) is matched with the adjusting fastening screw hole (101), the adjusting fastening bolt (10) is tightened to tightly press the drill rod (11) and fix the fixing section (1) on the drill rod (11); the adjusting fastening bolt (10) is loosened, and the fixing section (1) is separated from the drill rod (11).

3. The drill pipe centralizer of claim 2 wherein: The number of the hinge ears I (2) on the fixing section (1) is four, the number of the upper and lower groups of the hinge ears II (6) of the guide ring (7) is four, and the number of the connecting steel plates (4) is eight.

4. The drill pipe centralizer of claim 2 wherein: The adjusting fastening screw holes (101) comprise two groups of symmetrical adjusting fastening screw holes, and each group has two adjusting fastening screw holes.

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