A geological exploration hole expander

Abstract

The present invention relates to the technical field of hole expanders, and in particular to a geological exploration hole expander, comprising a drill rod body that can be lengthened and is installed on a drilling device, wherein the top and bottom of the drill rod body are provided with connecting devices, the drill rod body is connected to a mounting frame through the connecting device, connecting pieces are provided at both ends of the mounting frame, and the bottoms of the connecting pieces are provided with clamping rings, and a detachable reinforcement device is provided between two of the clamping rings, the reinforcement device is composed of a plurality of fan-shaped blocks of siege cylinders, and the side walls of each of the fan-shaped blocks are hinged to the clamping rings through telescopic pieces, and a trigger device for pushing the fan-shaped blocks to move outward is provided inside the drill rod body, and there is no need to frequently pour cement for reinforcement, which greatly improves production efficiency and prevents the drill rod from forming irregular friction on the hole wall when swinging, affecting the drilling accuracy, and the mounting frame can be reused to save production costs.

Description

Technical Field

[0001] The invention relates to the technical field of hole expanders, and in particular to a geological exploration hole expander. Background Art

[0002] Geological exploration is the investigation and research activity of exploring and detecting geology through various means and methods, determining the appropriate bearing layer, determining the foundation type according to the bearing capacity of the bearing layer, and calculating the foundation parameters. It is the investigation and research work on the geological conditions such as rocks, strata, structures, minerals, hydrology, landforms, etc. in a certain area to find industrially significant mineral deposits in the mineral survey, to ascertain the quality and quantity of minerals, as well as the technical conditions for mining and utilization, and to provide the mineral reserves and geological data needed for mine construction design.

[0003] In the process of geological exploration, it is often necessary to use drilling equipment to drill holes in the exploration area. When drilling holes in the soil, the soil is relatively loose. When drilling to a certain depth, due to the long length of the drill rod, the part of the drill rod shaft will form friction with the upper part of the hole wall during the downward drilling process. The diameter of the hole wall caused by this friction will become larger. In order to solve this problem, after drilling to a certain depth, it is necessary to use casing to cast and reinforce the drilled hole wall. This results in a shorter drilling distance, frequent casting and reinforcement, and frequent pulling and square rod operations, which seriously affect the construction progress. Summary of the invention

[0004] The purpose of the present invention is to overcome the shortcomings of the prior art that the drill rod needs to be frequently taken out and placed for pouring during geotechnical exploration, which affects the construction efficiency, and to provide a geological exploration reamer.

[0005] In order to achieve the above-mentioned purpose, the embodiment of the present invention specifically adopts the following technical scheme: a geological exploration reamer, comprising a drill rod body that can be lengthened and is installed on a drilling device, the top and bottom of the drill rod body are provided with connecting devices, the drill rod body is connected to a mounting frame through the connecting device, both ends of the mounting frame are provided with connecting pieces, the bottom of the connecting pieces are provided with clamping rings, a detachable reinforcement device is provided between the two clamping rings, the reinforcement device is composed of a cylindrical combination of a plurality of fan-shaped blocks, the side wall of each fan-shaped block is hinged to the clamping ring through a telescopic piece, and a trigger device for pushing the fan-shaped block to move outward is provided inside the drill rod body.

[0006] Furthermore, the side surfaces of the two sector blocks are connected via a connecting plate and a connecting groove, and the connecting plate is clamped inside the connecting groove and movably connected via a limiting block.

[0007] Furthermore, the bottom of the connecting plate is hinged to the side of the sector block through a pin.

[0008] Furthermore, the trigger device comprises a driving rod arranged in the middle of the drill rod body, and a collar for stabilizing the driving rod is arranged inside the connecting piece.

[0009] Furthermore, a fixing seat is arranged on the outer wall of the driving rod, a telescopic rod is arranged at the end of the fixing seat, the output end of the telescopic rod can abut against the inner wall of the sector block, and the bottom of the telescopic rod is hinged to the fixing seat through a torsion spring.

[0010] Furthermore, the telescopic part is a first rotating shaft arranged inside the fan-shaped block, the first rotating shaft vertically penetrates the fan-shaped block, a spherical head is arranged on the inner wall of the fan-shaped block, one end of the spherical head protrudes from the inner wall of the fan-shaped block, a connecting rod is arranged at the bottom of the spherical head, and a support block connected to the first rotating shaft is arranged at the bottom of the connecting rod.

[0011] Furthermore, the connecting end of the first rotating shaft and the supporting block is an inclined surface inclined toward one end of the spherical head, and the back side of the supporting block is provided with an elastic member protruding toward one side of the spherical head.

[0012] Furthermore, both ends of the first rotating shaft are sleeved with springs that are pushed out toward the support block position.

[0013] Furthermore, the outer side surface of the sector block is provided with a plurality of protrusions, and the connecting surface between two sector blocks is connected by a step surface.

[0014] The beneficial effects of the embodiments of the present invention are as follows: a detachable reinforcement device for reinforcing the borehole wall is connected, the reinforcement device is composed of a plurality of sector blocks surrounding a cylinder, the sector blocks are connected by connecting plates and connecting grooves to achieve flexible deployment, the reinforcement position of the sector blocks is determined by a driving rod and a trigger device, and there is no need to pour cement reinforcement back and forth, which greatly improves production efficiency. At the same time, the installed sector blocks also form protection for the drill rod body to prevent the drill rod from forming irregular friction on the hole wall when swinging, affecting the drilling accuracy, thereby ensuring the use effect, and at the same time, the mounting frame can be reused, saving production costs and improving the use effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall installation structure of the present invention;

[0016] Figure 2 It is a schematic diagram of the overall structure of the present invention;

[0017] Figure 3 It is a schematic diagram of the overall structure of the mounting frame of the present invention;

[0018] Figure 4 It is a partial cross-sectional structural schematic diagram of the present invention;

[0019] Figure 5It is a schematic diagram of the structure of the preparation state of the present invention;

[0020] Figure 6 It is a schematic diagram of the structure of the hole expansion state of the present invention;

[0021] Figure 7 It is a schematic cross-sectional structure diagram of the first rotating shaft of the sector block of the present invention;

[0022] Figure 8 It is a schematic diagram of the position structure of the connecting plate and the connecting groove of the present invention;

[0023] Fig. 9 It is a schematic diagram of the overall structure of Embodiment 2 of the present invention;

[0024] In the figure: 1, drill rod body; 2, driving rod; 201, fixing seat; 202, telescopic rod; 3, fan-shaped block; 301, connecting piece; 302, clamping ring; 303, connecting column; 304, connecting plate; 3041, pin; 305, spherical head; 3051, connecting rod; 3052, supporting block; 3053, elastic member; 306, first rotating shaft; 3061, spring; 4, drill bit; 5, driving disk; 501, connecting pipe; 502, plunger rod. DETAILED DESCRIPTION

[0025] Preferred embodiments of the present invention are described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0026] See also Figures 1 to 8 The embodiment of the present invention discloses a geological exploration reamer mainly composed of a drill pipe body 1, a mounting frame, a connecting piece 301, a clamping ring 302, a reinforcing device, and a triggering device. The drill pipe body 1 is designed to adopt the existing extendable structure connected by threads to meet the exploration needs of different depths. The top and bottom of the drill pipe body 1 are both equipped with connecting devices, which are connecting threads set on the inner wall of the drill pipe. The connecting devices are firmly connected to the mounting frame through the connecting threads, and the degree of modification is relatively small, and it is applicable to most of the existing drill pipe bodies 1.

[0027] Connectors 301 are provided at both ends of the mounting frame. The outer wall of the connector 301 is provided with threads connected to the inside of the drill rod body 1. The diameter of the connector 301 is smaller than the diameter of the drill rod body 1. The mounting frame can be installed between two drill rod bodies 1 at any depth through the connector 301, which has strong stability and is easy to install. A clamping ring 302 is fixed at the bottom of the connector 301. The diameter of the clamping ring 302 is equal to the diameter of the drill rod body 1. The two clamping rings 302 are connected by a detachable reinforcement device for reinforcing the borehole wall. The reinforcement device is composed of a plurality of cylindrical fan-shaped blocks 3. Each fan-shaped block 3 is hinged to the clamping ring 302 through a telescopic member. The fan-shaped blocks 3 are connected by a connecting plate 304 and a connecting groove to achieve flexible deployment and ensure that a stable structure can be maintained during deployment. One end of the connecting plate 304 is inserted into the inside of the connecting groove and is movably connected through a limit block, which not only ensures the stability of the connection, but also allows the fan-shaped blocks 3 to be smoothly deployed when needed. In order to increase the flexibility of the connection, the bottom of the connecting plate 304 is hinged to the side of the fan-shaped block 3 through the pin 3041, so that two adjacent fan-shaped blocks 3 can be offset outward within a certain angle when subjected to external force, which is equivalent to one end of the fan-shaped block 3 protruding from the outside of the drill rod body 1, increasing the diameter of the drill rod at the hovering point. When the drill rod continues to rotate, the protruding part of the fan-shaped block 3 will form a space with a diameter larger than the drill rod body 1 at the hovering point, thereby achieving a hole expansion effect.

[0028] The trigger device is installed inside the drill rod body 1, and mainly includes components such as a drive rod 2, a collar, a fixing seat 201, a telescopic rod 202 and a torsion spring. The drive rod 2 is set in the middle position of the drill rod body 1. The drive rod 2 selects different materials according to different drilling requirements. When it is necessary to supply water to the drill bit 4, the middle position of the drive rod 2 is hollow, and water is directly supplied to the drill bit 4 through the middle hole to ensure smooth drilling. In order to control the expansion of the fan-shaped block 3, the bottom of the drive rod 2 is connected to the drill bit 4 below or the drill rod body 1 through a quick connector. The part of the drive rod 2 on the drilling machine is fixed to the top drill rod body 1 through a pin through a marking mark, which is used to determine the relative position of the fixing seat 201 and the mounting frame. The fixing seat 201 is installed on the outer wall of the drive rod 2 in the mounting frame. The fixed seat 201 is tapered as a whole, and the fixed seat 201 is arranged toward the fan-shaped block 3. The tapered structure increases the stability of the connection. A telescopic rod 202 is provided on the fixed seat 201. The top of the telescopic rod 202 is a triangular prism. The bottom of the telescopic rod 202 is hinged to the fixed seat 201 through a torsion spring, and an angle is formed between the telescopic rod 202 and the fixed seat 201. The top of the telescopic rod 202 abuts against the connecting column 303 or the fan-shaped block 3 on the side of the mounting frame. The fan-shaped block 3 is installed on the outside of the connecting column 303. A groove for accommodating the end of the telescopic rod 202 is provided on the connecting column 303. During normal drilling, the end of the telescopic rod 202 is clamped in the groove. When the fan-shaped block 3 needs to be ejected, the driving rod 2 is rotated to improve the control effect and control the expansion of the fan-shaped block 3.

[0029] When the drill rod body 1 drills downward to a certain depth, the driving rod 2 descends accordingly. When the sector block 3 needs to be fixed to the inner wall of the borehole, the driving rod 2 is rotated counterclockwise to take the telescopic rod 202 out of the groove of the connecting column 303. Under the action of the torsion spring, the end of the telescopic rod 202 will act on the inner wall of the sector block 3 and abut against the inner wall of the sector block 3, thereby controlling the rotation angle of the driving rod 2 so that it contacts the trigger device, thereby pushing the sector block 3 to move outward to achieve the hole expansion effect. A limiting groove is provided at the connection between the fixed seat 201 and the telescopic rod 202. After all the sector blocks 3 are pushed out, the side of the connecting column 303 pushes the telescopic rod 202 to rotate counterclockwise. Under the action of the limiting groove and the torsion spring, the end of the telescopic rod 202 protrudes from the outside of the connecting column 303, pushing the telescopic rod 202 to directly act on the inner wall of the sector block 3, so that the sector block 3 that falls off from the sector block 3 fits more closely with the borehole wall. The outer side surface of the sector block 3 is provided with a plurality of convex points, which can increase the friction with the hole wall during the hole expansion process and improve the hole expansion effect. At the same time, after the sector block 3 falls off, the bonding force with the hole wall is increased to ensure the stability of the fixed position of the sector block 3. The connecting surface between the two sector blocks 3 is connected by a step surface to increase the stability and strength of the connection.

[0030] The telescopic member is in the form of a first rotating shaft 306, which vertically passes through the fan-shaped block 3. The upper and lower ends of the first rotating shaft 306 protrude and are connected to the fan-shaped block 3 and the clamping holes set on the clamping ring 302. A single fan-shaped block 3 can rotate with the first rotating shaft 306 as the connection point. Since two adjacent fan-shaped blocks 3 are connected by a connecting plate 304 and a connecting groove, the diameter of the fan-shaped blocks 3 after unfolding is larger than the drill pipe body 1 and remains connected. The head of the triangular prism of the telescopic rod 202 does not affect the rotation, thereby ensuring the stability of the fixation of the fan-shaped block 3. The inside of the connecting groove is provided with convex ridges, so that the connecting plate 304 maintains a certain tightness when pulled out, preventing the connecting plate 304 from sliding inside the connecting groove, making the fan-shaped block 3 more stable after opening.

[0031] A spherical head 305 is provided on the inner wall of the sector block 3. The spherical head 305 and the telescopic rod 202 are in the same horizontal plane. One end of the spherical head 305 protrudes from the inner wall of the sector block 3 so as to contact the telescopic rod 202. The bottom of the spherical head 305 is connected to the connecting rod 3051 of the first rotating shaft 306 through a connecting rod 3051. A support block 3052 is provided at the bottom of the connecting rod 3051 to connect with the first rotating shaft 306. In order to ensure that the spherical head 305 can rotate smoothly, the connecting end of the first rotating shaft 306 and the support block 3052 is designed as an inclined surface inclined toward one end of the spherical head 305. The back side of the support block 3052 is provided with an elastic member 3053, such as a spring or an elastic sheet, which is ejected toward one side of the spherical head 305. The elastic member 3053 is fixed to the back of the support block 3052. The first rotating shaft 306 is connected to provide the necessary reset force. Both ends of the first rotating shaft 306 are sleeved with springs 3061 that are pushed out toward the position of the support block 3052. The force of the elastic member 3053 is greater than the force of the springs 3061 at both ends. Under the action of the elastic member 3053, the two ends of the first rotating shaft 306 can remain protruding from the sector block 3 and connected to the clamping ring 302 to ensure the use state. When the sector block 3 needs to be pushed out, the telescopic rod 202 is rotated counterclockwise from the connecting column 303 and then rotated clockwise. The top of the triangular prism of the telescopic rod 202 acts on the spherical head 305, squeezing the spherical head 305 to move outward, so that the connecting rod 3051 and the support block 3052 overcome the elastic force of the elastic member 3053 and move outward as a whole. Since the upper and lower end surfaces of the support block 3052 are inclined After the support block 3052 moves, the upper and lower parts of the first rotating shaft 306 move to the middle position under the action of the spring 3061, so that the connection of the fan-shaped block 3 falls off the mounting bracket. When the drill rod body 1 continues to rotate, the part protruding from the outside of the drill rod will first form a hole expansion effect on the hole wall. After the first spherical head 305 is triggered, the drill rod is rotated for 5-10 minutes to form an installation space on the hole wall, and then rotated counterclockwise to trigger the second spherical head 305. Due to the setting of the torsion spring, the telescopic rod 202 will shrink toward the fixing seat 201 when encountering the connecting column 303, which will not affect the operation. When the spherical heads 305 are pushed out one by one, the right side of the telescopic rod 202 is abutted against the left side of the connecting column 303, and the drill rod body 1 is continued to rotate so that the connecting column 30 3 drives the telescopic rod 202 to further squeeze the sector block 3. The inner wall diameter of the sector block 3 after squeezing is larger than the diameter of the drill rod body 1. Then the driving rod 2 is controlled so that the mark on the driving rod 2 at the drilling rig coincides with the mark on the top of the drill rod body 1. At this time, it means that the top of the telescopic rod 202 is clamped in the groove on the connecting column 303. At this point, the entire hole expansion and hole wall reinforcement work is completed. Due to the effect of the connecting column 303, it is possible to continue drilling on softer geology without pouring cement reinforcement back and forth, which greatly improves production efficiency. At the same time, the installed sector block 3 also protects the drill rod body 1 to prevent the drill rod from causing irregular friction on the hole wall when swinging, affecting the drilling accuracy, ensuring the use effect, and the mounting frame can be reused.Save production costs and improve use effects.

[0032] In actual use, the mounting frame and the sector block 3 are first installed between the drill rod body 1, and the length of the drill rod body 1 is adjusted as needed. As the drill rod body 1 continues to drill downward, when a predetermined depth is reached, the driving rod 2 drives the telescopic rod 202 to extend, pushing the sector block 3 to move outward, thereby achieving a hole expansion effect. After the hole expansion is completed, the position of the driving rod 2 can be adjusted to make the sector block 3 protrude outward, thereby controlling the sector block 3 to be fixed to the hole wall. After the fixing is completed, the telescopic rod 202 is retracted to facilitate continued downward drilling or pulling out of the drill rod, which can effectively solve the problem of uncontrolled enlargement of the hole wall diameter in the traditional drilling process, reduce the number of cement pouring times, and improve exploration efficiency and safety.

[0033] Example 2

[0034] like Fig. 9 As shown: the main difference between this embodiment and embodiment 1 is that a driving disk 5 is installed on the outer side of the driving rod 2 inside the mounting frame, the interior of the driving disk 5 is connected to the hollow structure inside the driving rod 2, and a plurality of cylindrical connecting tubes 501 are installed on the side wall of the driving disk 5. The position of the connecting tube 501 can be determined by the line mark on the top of the driving rod 2. A plunger rod 502 is installed inside the connecting tube 501. When drilling in normal use, the plunger rod 502 will not extend. When the sector block 3 needs to be triggered, it is only necessary to increase the water pressure inside the driving rod 2 so that the plunger rod 502 triggers the spherical head 305 to push the sector block 3 out. The connecting column 303 drives the plunger rod 502 to continue to form pressure on the sector block 3, so that the sector block 3 is expanded outward to expand the hole. After 20 minutes, the water pressure can be reduced and the drilling operation can be continued. The control is convenient and easy to implement.

[0035] It should be noted that in the description of the present invention, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0036] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] The term "comprise" or any other similar term is intended to cover a non-exclusive inclusion, such that a process, article, or apparatus / device that includes a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, article, or apparatus / device.

[0038] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. A geological exploration reamer, comprising a drill rod body (1) mounted on a drilling device and capable of being extended, characterized in that: The top and bottom of the drill rod body (1) are provided with connecting devices, the drill rod body (1) is connected to a mounting frame via the connecting devices, connecting pieces (301) are provided at both ends of the mounting frame, a clamping ring (302) is provided at the bottom of each of the connecting pieces (301), a detachable reinforcing device is provided between the two clamping rings (302), the reinforcing device is composed of a plurality of fan-shaped blocks (3) forming a cylindrical assembly, the side wall of each fan-shaped block (3) being hinged to the clamping ring (302) via a telescopic member, and a triggering device for pushing the fan-shaped block (3) to move outward is provided inside the drill rod body (1); The trigger device comprises a driving rod (2) arranged at a middle position of the drill rod body (1), and a collar for stabilizing the driving rod (2) is arranged inside the connecting piece (301); A fixing seat (201) is provided on the outer wall of the driving rod (2), a telescopic rod (202) is provided at the end of the fixing seat (201), the output end of the telescopic rod (202) is capable of abutting against the inner wall of the fan-shaped block (3), and the bottom of the telescopic rod (202) is hinged to the fixing seat (201) via a torsion spring; The telescopic member is a first rotating shaft (306) arranged inside the fan-shaped block (3), the first rotating shaft (306) vertically passing through the fan-shaped block (3), a spherical head (305) is arranged on the inner wall of the fan-shaped block (3), one end of the spherical head (305) protrudes from the inner wall of the fan-shaped block (3), a connecting rod (3051) is arranged at the bottom of the spherical head (3055), and a supporting block (3052) connected to the first rotating shaft (306) is arranged at the bottom of the connecting rod (3051).

2. The geological prospecting reamer according to claim 1, characterized in that: The side surfaces of the two sector blocks (3) are connected via a connecting plate (304) and a connecting groove, and the connecting plate (304) is snap-fitted into the inside of the connecting groove and movably connected via a limiting block.

3. The geological prospecting reamer according to claim 2, characterized in that: The bottom of the connecting plate (304) is hinged to the side of the sector block (3) via a pin (3041).

4. The geological prospecting reamer according to claim 1, characterized in that: The connection end between the first rotating shaft (306) and the support block (3052) is an inclined surface inclined toward one end of the spherical head (305), and the back side of the support block (3052) is provided with an elastic member (3053) protruding toward one side of the spherical head (305).

5. The geological prospecting reamer according to claim 4, characterized in that: Both ends of the first rotating shaft (306) are sleeved with springs (3061) that are pushed out toward the support block (3052).

6. The geological prospecting reamer according to claim 1, characterized in that: The outer side surface of the sector-shaped block (3) is provided with a plurality of protrusions, and the connecting surface between two sector-shaped blocks (3) is connected via a step surface.

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