A drilling anti-deviation device for geotechnical engineering exploration

Abstract

This utility model discloses a drilling anti-deviation device for geotechnical engineering exploration, including a base with a drill hole at the top center. Two arc-shaped fixing plates are symmetrically fixed to the inner wall of the drill hole. Anti-deviation mechanisms are fixed to the bottom and top of opposite sides of the two arc-shaped fixing plates. Each anti-deviation mechanism includes a fixing ring fixed between the two arc-shaped fixing plates. Two arc-shaped positioning plates are symmetrically and elastically arranged inside the fixing ring. Push rods are fixed to opposite sides of the two arc-shaped positioning plates, with the rod walls of the two push rods slidably connected to the two sides of the fixing ring. This utility model achieves graded constraint through differentiated limiting external forces. Stronger limiting is applied to the lower end of the drill rod with high vibration to effectively prevent deviation, while weaker limiting is applied to the upper end of the drill rod with low vibration. This avoids excessive constraint leading to drill rod feed obstruction and rigid wear of the outer wall, while simultaneously stabilizing the force balance of the drill rod, thus improving drilling efficiency and extending the service life of the drill rod.

Description

Technical Field

[0001] This utility model relates to the field of geotechnical engineering exploration technology, specifically to a drilling anti-deviation device for geotechnical engineering exploration. Background Technology

[0002] In geotechnical engineering drilling operations, drill rods need to penetrate deep underground to obtain soil and rock samples, and the portion of the drill rod protruding above the ground often has a certain length. To prevent the drill rod from deviating due to factors such as vibration and ground resistance during drilling, which could affect drilling accuracy and borehole integrity, the industry typically uses limiters and fixations on the upper and lower exposed ends of the drill rod.

[0003] However, during actual drilling, the stress state of the exposed parts of the drill rod varies significantly: the lower end of the drill rod, closer to the ground, directly bears the mechanical vibration of the drilling rig's power head and is prone to friction and collision with the borehole casing and the surrounding soil and rock, resulting in a significantly greater vibration force; while the upper end of the drill rod, farther from the ground, experiences vibration transmission and attenuation, resulting in a relatively smaller vibration force. Current anti-deviation devices do not adapt to this difference, applying the same strong external force constraint to both the upper and lower exposed ends of the drill rod. This strong external force on the upper exposed end of the drill rod creates excessive constraint, depriving the drill rod of normal micro-adjustment space. It also leads to continuous rigid friction between the upper end of the drill rod and the limiting structure, accelerating the wear of the drill rod's outer wall, while hindering smooth drill rod feed and reducing drilling efficiency.

[0004] To address this, a drilling anti-deviation device for geotechnical engineering investigation is proposed. Utility Model Content

[0005] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a drilling anti-deviation device for geotechnical engineering exploration, which is used to solve the problems mentioned in the background technology.

[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution.

[0007] This utility model provides a drilling anti-deviation device for geotechnical engineering exploration, including a base. A drill hole is opened at the center of the top of the base. Two arc-shaped fixing plates are symmetrically fixed on the inner wall of the drill hole. Anti-deviation mechanisms are fixed on the bottom and top of the opposite side of the two arc-shaped fixing plates. The anti-deviation mechanism includes a fixing ring fixedly disposed between the two arc-shaped fixing plates. Two arc-shaped positioning plates are symmetrically elastically disposed inside the fixing ring. Push rods are fixed on the opposite side of the two arc-shaped positioning plates. The rod walls of the two push rods are slidably connected to the two sides of the fixing ring, and springs are sleeved on the rod walls of the two push rods. The two ends of the springs are fixedly connected to the arc-shaped positioning plates and the fixing ring, respectively.

[0008] Both sides of the top of the base are fixedly provided with fixing seats. The interior of each fixing seat is provided with a screw threaded in the horizontal direction. The end of each screw facing the push rod is provided with a push plate, and the two push plates are arranged in a corresponding position to the push rods on both sides. The other end of each screw is fixedly provided with a handle.

[0009] Preferably, the push rod is a rod with a square end face, and the side wall of the fixing ring is provided with a square hole that matches the push rod wall.

[0010] Preferably, the length of the push rods located on both sides of the upper anti-deviation mechanism is less than the length of the push rods located on both sides of the lower anti-deviation mechanism.

[0011] Preferably, a strip groove is provided horizontally at the top of the base and below the push plate, and a slide rod is fixedly provided horizontally inside the strip groove. The slide rod has a slider on its wall, and the top of the slider is fixedly connected to the bottom of the push plate.

[0012] Preferably, a scale line is provided on the top of the base and on one side of the strip groove.

[0013] Preferably, the base is provided with threaded fixing posts at all four corners.

[0014] Preferably, the inner diameter of the arc-shaped positioning plate matches the diameter of the drill rod.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] By using a design where the push rods on both sides of the upper and lower anti-deviation mechanism have different lengths, when the operator turns the handle to drive the push plate, the push plate first contacts the longer lower push rod and then the shorter upper push rod. Ultimately, this ensures that the limiting force of the lower anti-deviation mechanism on the lower end of the drill rod is greater than the limiting force of the upper mechanism on the upper end of the drill rod. The strong constraint at the lower end offsets the large vibration force, effectively preventing the lower end of the drill rod from deviating due to vibration, friction, and collision. This ensures drilling accuracy and borehole wall integrity, avoids the problem of excessive constraint on the upper exposed part of the drill rod caused by applying the same strong constraint to both ends of the drill rod in traditional devices, and solves the drawback of excessive constraint hindering the smooth feed of the drill rod, thus improving drilling efficiency. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the cover of this utility model;

[0018] Figure 2 This is a schematic diagram of the planar structure of the present invention;

[0019] Figure 3 This is a three-dimensional structural diagram of the anti-deviation mechanism in this utility model;

[0020] Figure 4This is a perspective view of the connection between the fixed base, screw, push plate and handle in this utility model.

[0021] In the diagram: 1. Base; 2. Drill hole; 3. Arc-shaped fixing plate; 4. Anti-deviation mechanism; 41. Fixing ring; 42. Arc-shaped positioning plate; 43. Push rod; 44. Spring; 5. Fixing seat; 6. Screw; 7. Push plate; 8. Handle; 9. Strip groove; 10. Slide rod; 11. Slider; 12. Scale line. Detailed Implementation

[0022] A drilling anti-deviation device for geotechnical engineering investigation, such as Figure 1-4 As shown, the system includes a base 1, with threaded fixing posts 13 at each of the four corners to increase the stability of the base 1 during installation. A drill hole 2 is located at the center of the top of the base 1. Two arc-shaped fixing plates 3 are symmetrically fixed to the inner wall of the drill hole 2. Anti-deviation mechanisms 4 are fixed to the bottom and top of opposite sides of the two arc-shaped fixing plates 3. The length of the push rods 43 on both sides of the upper anti-deviation mechanism 4 is shorter than the length of the push rods 43 on both sides of the lower anti-deviation mechanism 4. The anti-deviation mechanism 4 includes a fixing ring 41 fixed between the two arc-shaped fixing plates 3. Two arc-shaped positioning plates 42 are symmetrically and elastically arranged inside the fixing ring 41. The inner diameter of the arc-shaped positioning plates 42 matches the diameter of the drill rod. Push rods 43 are fixedly installed on opposite sides of each arc-shaped positioning plate 42. The walls of the two push rods 43 are slidably connected to the two sides of the fixing ring 41. The push rods 43 are rods with square end faces. The side wall of the fixing ring 41 is provided with square holes that match the walls of the push rods 43. The square structure design can prevent the push rods 43 from rotating and increase the stability of movement. In addition, springs 44 are sleeved on the walls of the two push rods 43. The two ends of the springs 44 are fixedly connected to the arc-shaped positioning plate 42 and the fixing ring 41, respectively. When the external force is released at the end of the push rod 43, the springs 44 can apply elastic force between the arc-shaped positioning plate 42 and the fixing ring 41, so that the arc-shaped positioning plate 42 automatically resets.

[0023] The base 1 has fixed seats 5 on both sides of its top. The interior of each fixed seat 5 has a threaded screw 6. The end of each screw 6 facing the push rod 43 is rotatably equipped with a push plate 7. The two push plates 7 are positioned corresponding to the push rods 43 on both sides. The other end of each screw 6 is fixed with a handle 8. The top of the base 1 and below the push plate 7 has a horizontally oriented groove 9. The interior of the groove 9 has a horizontally fixed sliding rod 10. The wall of the sliding rod 10 has a slider 11. The top of the slider 11 is fixedly connected to the bottom of the push plate 7. When the push plate 7 moves, it can drive the slider 11 at the bottom to move on the sliding rod 10, increasing the stability of the push plate 7. The top of the base 1 and one side of the groove 9 has a scale line 12. The scale line 12 allows the operator to accurately observe the distance the push plate 7 moves, thus ensuring that the push plates 7 on both sides move the same distance.

[0024] In summary: First, place the base 1 at the drilling hole opening, so that the drilling hole 2 in the center of the base 1 is precisely aligned with the preset drilling hole position. Then, rotate the threaded fixing stakes 13 at the four corners of the base 1 and screw the fixing stakes 13 into the ground to achieve rigid fixation of the base 1 to the ground, so as to avoid the overall displacement of the device caused by subsequent drilling vibration, and lay a stable foundation for anti-deviation operation.

[0025] Then, the drill rod to be drilled is aligned with the borehole 2 from above the base 1 and passes through the fixing rings 41 of the two anti-deviation mechanisms 4 symmetrically arranged on the upper and lower sides of the arc-shaped fixing plate 3 on the inner wall of the borehole 2, so that the exposed part of the drill rod is between the arc-shaped positioning plates 42 of the upper and lower fixing rings 41 respectively.

[0026] The operator manually rotates the handles 8 on the fixed seats 5 on both sides of the base 1. The handles 8 drive the screw 6 fixed to them to rotate laterally within the fixed seat 5. The end of the screw 6 away from the handle 8 pushes the push plate 7 to move. The bottom of the push plate 7 slides with the slide rod 10 in the slot 9 of the base 1 through the slider 11, ensuring that the push plate 7 moves stably towards the push rod 43 in the horizontal direction. Because the push rods 43 of the upper and lower anti-deviation mechanisms 4 have different lengths (the upper push rod 43...), (Shorter than the lower push rod 43) When the push plate 7 moves the same distance, it first contacts the push rod 43 of the lower anti-deviation mechanism 4. Then, the handle 8 is rotated to push the push plate 7 forward. The push plate 7 then contacts the push rod 43 of the upper anti-deviation mechanism 4. The push plate 7 continues to push the push rod 43, causing the push rod 43 to slide in the square hole of the fixing ring 41. When the push rod 43 moves, it drives the arc-shaped positioning plate 42 fixed to it to move towards the drill rod. At the same time, it stretches the spring 44 between the fixing ring 41 and the arc-shaped positioning plate 42, so that the arc-shaped positioning plate 42 is tightly attached to the corresponding exposed end of the drill rod. Since the lower push rod 43 is pushed first and has a greater force, the clamping and limiting force of the lower arc-shaped positioning plate 42 on the lower end of the drill rod is greater than the limiting force of the upper arc-shaped positioning plate 42 on the upper end of the drill rod. Finally, the graded anti-deviation limiting of the upper and lower exposed ends of the drill rod is achieved, adapting to the difference in force between the two.

[0027] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A drilling anti-deviation device for geotechnical engineering exploration, comprising a base (1), characterized in that: A drill hole (2) is provided at the top center of the base (1). Two arc-shaped fixing plates (3) are symmetrically fixed on the inner wall of the drill hole (2). Anti-deviation mechanism (4) is fixed on the bottom and top of the opposite side of the two arc-shaped fixing plates (3). The anti-deviation mechanism (4) includes a fixing ring (41) fixed between the two arc-shaped fixing plates (3). Two arc-shaped positioning plates (42) are symmetrically elastically provided inside the fixing ring (41). Push rods (43) are fixed on the opposite side of the two arc-shaped positioning plates (42). The rod walls of the two push rods (43) are slidably connected to the two sides of the fixing ring (41). Springs (44) are sleeved on the rod walls of the two push rods (43). The two ends of the springs (44) are fixedly connected to the arc-shaped positioning plates (42) and the fixing ring (41) respectively. The base (1) is fixed with a fixed seat (5) on both sides of the top. The two fixed seats (5) are threaded with screws (6) in the middle. The two screws (6) are rotatably provided with push plates (7) at one end facing the push rod (43). The two push plates (7) are positioned corresponding to the push rods (43) on both sides. The other end of the two screws (6) is fixed with a handle (8).

2. The drilling anti-deviation device for geotechnical engineering investigation according to claim 1, characterized in that: The push rod (43) is a rod with a square end face, and the side wall of the fixing ring (41) is provided with a square hole that matches the rod wall of the push rod (43).

3. The drilling anti-deviation device for geotechnical engineering investigation according to claim 1, characterized in that: The length of the push rods (43) located on both sides of the anti-deviation mechanism (4) above is less than the length of the push rods (43) located on both sides of the anti-deviation mechanism (4) below.

4. The drilling anti-deviation device for geotechnical engineering investigation according to claim 1, characterized in that: A strip groove (9) is provided horizontally at the top of the base (1) and below the push plate (7), and a slide rod (10) is fixedly provided horizontally inside the strip groove (9). The slide rod (10) has a slider (11) on its wall, and the top of the slider (11) is fixedly connected to the bottom of the push plate (7).

5. The drilling anti-deviation device for geotechnical engineering investigation according to claim 4, characterized in that: A scale line (12) is provided on the top of the base (1) and on one side of the strip groove (9).

6. The drilling anti-deviation device for geotechnical engineering investigation according to claim 1, characterized in that: The base (1) is threaded with fixing posts (13) at all four corners.

7. The drilling anti-deviation device for geotechnical engineering investigation according to claim 1, characterized in that: The inner diameter of the arc-shaped positioning plate (42) matches the diameter of the drill rod.

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