A borehole radar detector hole-entering centering device

Abstract

This utility model relates to the field of borehole radar detector centering technology, specifically a borehole radar detector centering device, including an inlet pipe, a base fixedly installed at the bottom of the inlet pipe, a hydraulic device fixedly installed at the top of the inlet pipe, a borehole entry assembly installed on the inner side of the inlet pipe, and a hydraulic push rod installed at the bottom of the hydraulic device. When the hydraulic device is activated, it drives the hydraulic push rod to push the sliding plate one downward along the guide rail, thereby driving the drill bit and the borehole radar detector body to move downward, realizing the borehole radar detector body entering the borehole. During the downward movement of the borehole radar detector body, when the drill bit encounters a hard rock causing the borehole radar detector body to shake, the sliding plate four and the sliding plate two respectively squeeze the telescopic rod two and the telescopic rod one, causing the telescopic rod two and the telescopic rod one to retract, and the spring shock absorber two and the spring shock absorber one to retract, thus absorbing the vibration of the borehole radar detector body.

Description

Technical Field

[0001] This utility model relates to the field of borehole radar detector centering technology, and in particular to a borehole radar detector centering device. Background Technology

[0002] A borehole radar detector is a device used for geological exploration and engineering quality inspection. Its main detection functions include fault zone detection, cavity detection, water-bearing strata detection, weak rock layer detection, and rock strata detection. The borehole radar tunnel geological advanced detection imaging instrument utilizes the principle of borehole radar reflection imaging through advanced drilling in tunnels. It includes a radar transmitting and receiving antenna and a main unit. The antenna is connected to the main unit via optical fiber for data acquisition, storage, display, processing, and analysis. The performance of the borehole radar detector under different geological conditions is as follows: Fault zone detection: The borehole radar can image planar fault zones intersecting the borehole and point (volume) reflectors. Cavity detection: The borehole radar can detect the existence of cavities and identify their location and size by analyzing the characteristics of the reflected signals, such as hyperbolas or oblique lines. Water-bearing strata detection: In water-bearing strata, the propagation of electromagnetic waves is affected due to the high conductivity. In such cases, borehole radar may need to employ cross-hole measurement or borehole-to-surface measurement methods to obtain geological information by analyzing the amplitude and arrival time of the first wave. Weak rock strata detection: Weak rock strata typically have lower wave velocities and higher attenuation coefficients, which can lead to rapid attenuation of radar waves. Therefore, when detecting weak rock strata, it is necessary to select appropriate frequencies and operating modes to ensure sufficient detection depth and resolution. Rock strata detection: Borehole radar can provide discontinuous images of the bedrock surrounding the borehole, including the bedrock surface, different lithological interfaces, fissures, and karst caves. By analyzing the waveform and intensity characteristics of the reflected waves, the geological characteristics of the reflected wave group can be determined. The performance of borehole radar detectors is affected by various factors, including geological conditions, the frequency used, antenna type, and the operator's experience. Therefore, in practical applications, it is necessary to select appropriate technical parameters and operating methods according to specific circumstances.

[0003] Existing patent CN113357497B discloses a hole-drilling radar detector centering device. This invention includes a mounting frame, a conical cylinder, a rubber cylinder, a first connecting rod, a second connecting rod, a semi-circular shell, rollers, a first spring, a first torsion spring, a drive mechanism, and a guide mechanism. The conical cylinder is fixedly connected to the four sides of the mounting frame. The guide mechanism is installed circumferentially on the outer side of the conical cylinder, and the drive mechanism is installed between the two sides of the mounting frame. This invention, by placing the hole-drilling radar inside the rubber cylinder and aligning it with the hole opening, activates the drive mechanism. The drive mechanism does not limit the rubber cylinder; due to gravity, the rubber cylinder moves the hole-drilling radar downwards into the hole. The rollers contact the inner wall of the hole, guiding the rubber cylinder and thus guiding the hole-drilling radar. This avoids the hole-drilling radar from swaying, affecting the detection results, and prevents it from contacting the inner wall of the hole and causing wear.

[0004] However, although the existing patent CN113357497B can avoid the phenomenon of the drilling radar oscillating and affecting the detection results, and will not come into contact with the inner wall of the hole and cause wear, the drilling radar detector may also be worn during the process of entering the hole, in addition to the wear that may occur due to contact with the inner wall of the hole, the vibration generated by the longitudinal descent may also cause wear.

[0005] To address this, we propose a borehole radar detector centering device. Utility Model Content

[0006] The purpose of this invention is to address the shortcomings of existing technologies by proposing a borehole radar detector centering device.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A borehole radar detector centering device includes an inlet pipe, a base fixedly mounted at the bottom of the inlet pipe, a hydraulic device fixedly mounted at the top of the inlet pipe, an entry assembly mounted on the inner side of the inlet pipe, a hydraulic push rod mounted at the bottom of the hydraulic device, and a guide rail fixedly mounted on the inner side of the inlet pipe.

[0009] The bottom of the hydraulic push rod is fixedly connected to the sliding plate. The bottom of the sliding plate is provided with a telescopic rod, and the outside of the telescopic rod is provided with a spring shock absorber. When the hydraulic device is activated, it drives the hydraulic push rod to push the sliding plate downward along the guide rail, which in turn drives the drill bit and the drilling radar detector body to move downward, so that the drilling radar detector body can enter the hole.

[0010] The bottom of the spring shock absorber is provided with a sliding plate 2, and the bottom of the sliding plate 2 is provided with the drilling radar detector body. The sliding plate 2 is used to limit the top of the drilling radar detector body.

[0011] The bottom of the second sliding plate is fixedly provided with a connecting rod, and the bottom of the connecting rod is fixedly provided with a third sliding plate. The second sliding plate is used to limit the bottom of the borehole radar detector body.

[0012] The bottom of the sliding plate three is provided with a telescopic rod two, and the outer side of the telescopic rod two is provided with a spring shock absorber two. When the drilling radar detector body moves downward, and the drill bit encounters a hard stone, causing the drilling radar detector body to shake, the sliding plate four and the sliding plate two respectively squeeze the telescopic rod two and the telescopic rod one, causing the telescopic rod two and the telescopic rod one to retract, and the spring shock absorber two and the spring shock absorber one to retract, thereby absorbing the vibration of the drilling radar detector body.

[0013] The bottom of the spring shock absorber 2 is fixedly provided with a sliding plate 4, and the bottom of the sliding plate 4 is fixedly provided with a drill bit, which is used to drill a hole downwards.

[0014] Compared with the prior art, this utility model provides a borehole radar detector centering device, which has the following advantages:

[0015] This utility model involves installing the hole-entry assembly, activating the hydraulic device, driving the hydraulic push rod to push the sliding plate downwards along the guide rail, which in turn drives the drill bit and the hole-drilling radar detector body downwards, thus enabling the hole-drilling radar detector body to enter the hole.

[0016] In this invention, during the downward movement of the drilling radar detector body, when the drill bit encounters a hard rock causing the drilling radar detector body to shake, sliding plate four and sliding plate two respectively press the telescopic rod two and telescopic rod one, causing the telescopic rod two and telescopic rod one to retract, and spring shock absorber two and spring shock absorber one to retract, thereby absorbing the vibration of the drilling radar detector body.

[0017] The parts of this device not covered herein are the same as or can be implemented using existing technologies. This utility model has a simple structure and is easy to operate. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of a borehole radar detector centering device proposed in this utility model;

[0019] Figure 2 This is a partial three-dimensional structural diagram of a borehole radar detector centering device proposed in this utility model;

[0020] Figure 3 This is a partial three-dimensional structural diagram of a borehole radar detector centering device proposed in this utility model;

[0021] Figure 4This is a partial three-dimensional structural diagram of a borehole radar detector centering device proposed in this utility model.

[0022] In the diagram: 1. Inlet pipe; 2. Base; 3. Hydraulic device; 4. Hydraulic push rod; 5. Guide rail; 6. Sliding plate one; 7. Telescopic rod one; 8. Spring shock absorber one; 9. Sliding plate two; 10. Drilling radar detector body; 11. Connecting rod; 12. Sliding plate three; 13. Telescopic rod two; 14. Spring shock absorber two; 15. Sliding plate four; 16. Drill bit. Detailed Implementation

[0023] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, but should not be construed as limiting the present invention.

[0024] Please see Figures 1-4 A borehole radar detector centering device includes an inlet pipe 1, a base 2 fixedly installed at the bottom of the inlet pipe 1, a hydraulic device 3 fixedly installed at the top of the inlet pipe 1, an inlet assembly installed inside the inlet pipe 1, a hydraulic push rod 4 installed at the bottom of the hydraulic device 3, and a guide rail 5 fixedly installed inside the inlet pipe 1.

[0025] The bottom of the hydraulic push rod 4 is fixedly connected to the sliding plate 6. A telescopic rod 7 is installed at the bottom of the sliding plate 6. A spring damper 8 is installed on the outer side of the telescopic rod 7. A sliding plate 9 is installed at the bottom of the spring damper 8. The drilling radar detector body 10 is installed at the bottom of the sliding plate 9. A connecting rod 11 is fixedly installed at the bottom of the sliding plate 9. A sliding plate 12 is fixedly installed at the bottom of the connecting rod 11. A telescopic rod 13 is installed at the bottom of the sliding plate 12. A spring damper 14 is installed on the outer side of the telescopic rod 13. A sliding plate 15 is fixedly installed at the bottom of the spring damper 14. A drill bit 16 is fixedly installed at the bottom of the sliding plate 15. Drilling is then performed. When the radar detector enters the hole centering device, the hydraulic device 3 is activated, driving the hydraulic push rod 4 to push the sliding plate 6 downward along the guide rail 5. This, in turn, drives the drill bit 16 and the drilling radar detector body 10 downward, thus enabling the drilling radar detector body 10 to enter the hole. During the downward movement of the drilling radar detector body 10, when the drill bit 16 encounters a hard rock causing the drilling radar detector body 10 to shake, the sliding plate 4 15 and the sliding plate 2 9 respectively squeeze the telescopic rod 2 13 and the telescopic rod 1 7, causing the telescopic rod 2 13 and the telescopic rod 1 7 to retract. The spring shock absorber 2 14 and the spring shock absorber 1 8 also retract, thus damping the drilling radar detector body 10.

[0026] Working principle: When using the borehole radar detector's centering device, the hydraulic device 3 is activated, driving the hydraulic push rod 4 to push the sliding plate 6 downwards along the guide rail 5. This, in turn, drives the drill bit 16 and the borehole radar detector body 10 downwards, allowing the borehole radar detector body 10 to enter the borehole. During the downward movement of the borehole radar detector body 10, when the drill bit 16 encounters a hard rock causing the borehole radar detector body 10 to shake, the sliding plate 4 15 and the sliding plate 2 9 respectively press the telescopic rod 2 13 and the telescopic rod 1 7, causing the telescopic rod 2 13 and the telescopic rod 1 7 to retract. The spring damper 2 14 and the spring damper 1 8 also retract, thus damping the vibration of the borehole radar detector body 10.

[0027] The above-disclosed embodiments are merely one or more preferred embodiments of this application and should not be construed as limiting the scope of this application. Those skilled in the art can understand that all or part of the processes for implementing the above embodiments and equivalent changes made in accordance with the claims of this application still fall within the scope of this application.

Claims

1. A device for centring a borehole radar detector into a hole, comprising a lead-in tube (1), characterised in that The bottom of the inlet pipe (1) is fixedly provided with a base (2), the top of the inlet pipe (1) is fixedly provided with a hydraulic device (3), the inner side of the inlet pipe (1) is provided with an inlet assembly, the bottom of the hydraulic device (3) is provided with a hydraulic push rod (4), and the inner side of the inlet pipe (1) is fixedly provided with a guide rail (5).

2. A borehole radar detector entry alignment device according to claim 1, wherein The bottom of the hydraulic push rod (4) is fixedly connected to the sliding plate (6). The bottom of the sliding plate (6) is provided with a telescopic rod (7), and the outside of the telescopic rod (7) is provided with a spring shock absorber (8).

3. A borehole radar detector entry alignment device according to claim 2, wherein The bottom of the spring shock absorber (8) is provided with a sliding plate (9), and the bottom of the sliding plate (9) is provided with the drilling radar detector body (10).

4. A borehole radar detector entry alignment device according to claim 3, wherein A connecting rod (11) is fixedly provided at the bottom of the second sliding plate (9), and a third sliding plate (12) is fixedly provided at the bottom of the connecting rod (11).

5. A borehole radar detector entry alignment device according to claim 4, wherein The bottom of the sliding plate three (12) is provided with a telescopic rod two (13), and the outside of the telescopic rod two (13) is provided with a spring shock absorber two (14).

6. A borehole radar detector entry alignment device according to claim 5, wherein The bottom of the spring damper 2 (14) is fixedly provided with a sliding plate 4 (15), and the bottom of the sliding plate 4 (15) is fixedly provided with a drill bit (16).

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