A borehole television imaging instrument with heat insulation smoking function

Abstract

The utility model relates to borehole television imaging equipment field, concretely is a kind of borehole television imaging appearance with heat insulation smoking function;Heat insulation cavity is coaxially arranged on the outer periphery of downhole probe, and cooling liquid is contained in heat insulation cavity;The height of heat insulation cavity is higher than downhole probe, and the second support plate and first support plate with threading hole are arranged in the high part with interval;Triangular support with threading hole is fixed at the top of heat insulation cavity;Vertical smoke exhaust passage is arranged in heat insulation cavity, and vertical smoke exhaust passage is communicated with horizontal smoke exhaust passage along the radial direction of heat insulation cavity after exceeding second support plate top, and multiple horizontal smoke exhaust passages are aggregated to the bottom of smoke exhaust collection port, and smoke exhaust fan is arranged in the center of first support plate.The utility model can reduce the temperature of downhole probe when borehole detection encounters temperature rise environment, avoid downhole probe to be burnt by heating;Further, smoke exhaust passage is arranged in heat insulation cavity, and smoke can be exhausted when borehole detection encounters smoke environment, avoid smoke interference to downhole camera.

Description

Technical Field

[0001] This utility model relates to the field of borehole television imaging equipment, specifically a borehole television imaging device with heat insulation and smoke extraction function. Background Technology

[0002] In engineering geological exploration, core drilling is generally used to understand underground geological conditions. However, core drilling technology has drawbacks such as insufficient core recovery rate, inconsistent core quality, long drilling time, high drilling costs, and inability to obtain the original occurrence of rock strata and fractures. Compared with core drilling technology, borehole television imaging technology has advantages such as rich information acquisition, high accuracy, and ease of operation, which can make up for the shortcomings of core drilling technology. Based on its downhole probe, borehole television imaging technology uses high-resolution imaging technology to accurately scan information such as well wall morphology, structural fractures, faults, and karst, providing visualization, intuitive expression of geological phenomena, and a wide coverage area, thus broadening its engineering applications. However, when using borehole television imaging, if a small amount of spontaneous combustion of loose coal occurs in the goaf, it may generate smoke in the borehole, affecting the acquisition of borehole television images. At the same time, with the increase of stratum depth or the influence of a small amount of spontaneous combustion of loose coal in the goaf, the temperature inside the borehole will also increase, which is detrimental to the safety of the downhole probe and cables. Utility Model Content

[0003] To address the aforementioned technical problems, this utility model provides a borehole television imaging device with heat insulation and smoke extraction function, comprising a downhole probe assembly. The downhole probe assembly includes a cylindrical downhole probe, with a heat insulation cavity coaxially arranged on the outer periphery of the downhole probe. The heat insulation cavity is an annular cavity filled with cooling liquid, and the bottom end of the heat insulation cavity is aligned with the downhole probe. The height of the heat insulation cavity is higher than that of the downhole probe. A second support plate and a first support plate are arranged at intervals from bottom to top inside the portion of the heat insulation cavity that is higher than the downhole probe. The second support plate and the first support plate are provided with wire-passing holes. A triangular bracket is fixed at the top of the heat insulation cavity, and a wire-passing hole is opened at the center of the top of the triangular bracket. Several vertical smoke extraction channels are evenly spaced along the circumference in the heat insulation cavity. The bottom end of the vertical smoke extraction channel is flush with the bottom end of the heat insulation cavity, and the top end extends beyond the second support plate and communicates with the horizontal smoke extraction channels arranged radially along the heat insulation cavity. The multiple horizontal smoke extraction channels converge towards the bottom end of the smoke extraction collection port. A smoke extraction fan is arranged at the center of the first support plate.

[0004] Furthermore, it also includes a ground imaging component and a transmission cable; the downhole probe component is connected to the ground imaging component via the transmission cable; the ground imaging component includes a take-up and take-up roller and a main unit, one end of the transmission cable is connected to the main unit, and the other end is connected to the downhole probe component after being wound up by the take-up roller.

[0005] Furthermore, the main unit is equipped with a display screen, which can display images captured by the downhole probe assembly. The main unit can store the images captured by the downhole probe assembly. The main unit includes a power supply and a positioning pulley assembly, which is a bracket equipped with fixed pulleys and placed at the borehole opening to facilitate positioning the transmission cable for lowering the downhole probe assembly.

[0006] Furthermore, the lower center of the downhole probe is a camera, and the camera is evenly surrounded by several LED lighting beads.

[0007] Furthermore, the inner diameter of the heat insulation cavity is the same as the outer diameter of the downhole probe, and the second support plate and the first support plate are circular plates with outer diameters consistent with the inner diameter of the heat insulation cavity.

[0008] Furthermore, the transmission cable passes sequentially through the wire hole of the triangular bracket, the wire hole on the first support plate, and the wire hole on the second support plate before connecting to the top of the downhole probe; the downhole probe is located in the heat insulation cavity, below the second support plate.

[0009] Furthermore, the smoke exhaust collection port is shaped like an inverted frustum, and both the smoke exhaust collection port and the smoke exhaust fan are arranged coaxially with the heat insulation cavity; wherein, the smoke exhaust fan is powered by a transmission cable.

[0010] Beneficial effects: This invention covers the circumference of the existing downhole probe with a heat insulation cavity, which can reduce the temperature of the downhole probe when the drilling probe encounters a high-temperature environment, and prevent the downhole probe from being burned by the high temperature; This invention further sets a smoke exhaust channel in the heat insulation cavity, which can exhaust the smoke when the drilling probe encounters a smoky environment, and prevent the smoke from interfering with the downhole camera. Attached Figure Description

[0011] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0013] Figure 2 This is a schematic diagram of the overall structure of the downhole probe assembly in this utility model;

[0014] Figure 3 This is a schematic cross-sectional view of the downhole probe assembly of this utility model (AA).

[0015] Figure 4This is a schematic cross-sectional view of the downhole probe assembly of this utility model.

[0016] In the diagram: 1-Insulation chamber; 2-Downhole probe; 3-Horizontal smoke exhaust channel; 4-Smoke exhaust fan; 5-Vertical smoke exhaust channel; 6-Camera; 7-Triangular bracket; 8-Positioning pulley assembly; 9-Retracting roller; 10-Main unit; 11-Display screen; 12-Transmission cable; 13-Wire hole; 14-LED lighting bead; 15-Smoke exhaust collection port; 16-First support plate; 17-Second support plate. Detailed Implementation

[0017] The technical solution of this utility model will now be clearly and completely described with reference to specific embodiments and accompanying drawings. In the illustrated embodiments, the directional representations, such as up, down, left, right, front, and back, are relative and are used to explain the relative structures of different components in this application. These representations are appropriate when the components are in the positions shown in the figures. However, if the description of the component positions changes, then these representations are also considered to change accordingly.

[0018] like Figure 1 As shown, this utility model discloses a borehole television imaging device with heat insulation and smoke extraction function, mainly including a downhole probe assembly, a surface imaging assembly, and a transmission cable 12. The downhole probe assembly is connected to the surface imaging assembly via the transmission cable 12 (including power connection and communication connection). The surface imaging assembly includes a positioning pulley assembly 8, a take-up roller 9, and a main unit 10. One end of the transmission cable 12 is connected to the main unit 10, and after being wound by the take-up roller 9, the other end is connected to the downhole probe assembly via the positioning pulley assembly 8. The main unit 10 is equipped with a display screen 11, which can display the images captured by the downhole probe assembly. The main unit 10 can store the images captured by the downhole probe assembly and includes a power supply. The positioning pulley assembly 8 is a bracket with fixed pulleys, placed at the borehole opening to facilitate positioning the transmission cable 12 for lowering the downhole probe assembly.

[0019] like Figure 2-4As shown, the downhole probe assembly includes a cylindrical downhole probe 2. A camera 6 is located at the center of the lower end of the downhole probe 2. Several LED lighting beads 14 are evenly arranged around the camera 6. A heat insulation cavity 1 is coaxially arranged on the outer periphery of the downhole probe 2. The heat insulation cavity 1 is an annular cavity filled with cooling liquid (such as water). The inner diameter of the heat insulation cavity 1 is the same as the outer diameter of the downhole probe 2. The bottom end of the heat insulation cavity 1 is aligned with the downhole probe 2. The height of the heat insulation cavity 1 is higher than that of the downhole probe 2. A second support plate 17 and a first support plate 16 are spaced apart from bottom to top inside the portion of the heat insulation cavity 1 that is higher than the downhole probe 2. The second support plate 17 and the first support plate 16 are circular plates with an outer diameter consistent with the inner diameter of the heat insulation cavity 1. The second support plate 17 and the first support plate 16 are provided with wire holes 13. A triangular bracket 7 is fixed to the top of the heat insulation cavity 1. The three legs of the triangular bracket 7 are fixedly connected to the top of the heat insulation cavity 1. A wire hole 13 is opened at the center of the top of the triangular bracket 7. The transmission cable 12 passes through the wire hole 13 of the triangular bracket 7, the wire hole 13 on the first support plate 16 and the wire hole 13 on the second support plate 17 in sequence and then connects to the top of the downhole probe 2. The downhole probe 2 is located in the heat insulation cavity 1, below the second support plate 17. Several vertical smoke exhaust channels 5 are evenly spaced along the circumference in the heat insulation cavity 1. The bottom of each vertical smoke exhaust channel 5 is flush with the bottom of the heat insulation cavity 1, and its top extends beyond the second support plate 17 and connects with a horizontal smoke exhaust channel 3 arranged radially along the heat insulation cavity 1. Each horizontal smoke exhaust channel 3 is connected to a vertical smoke exhaust channel 5. The multiple horizontal smoke exhaust channels 3 converge towards the bottom of the inverted frustum-shaped smoke exhaust collection port 15. A smoke exhaust fan 4 is arranged at the center of the first support plate 16. The smoke exhaust collection port 15 and the smoke exhaust fan 4 are both arranged coaxially with the heat insulation cavity 1. The smoke exhaust fan 4 is powered by a transmission cable 12, and the switch for the smoke exhaust fan 4 is located on the ground.

[0020] When using the borehole television imaging instrument of this utility model for borehole detection, the heat insulation cavity can reduce the temperature of the downhole probe when encountering an environment with rising temperature, thus preventing the downhole probe from being burned by the rising temperature; when encountering a smoky environment during borehole detection, turning on the smoke exhaust fan 4 can remove the smoke in the borehole, thus preventing the smoke from interfering with the downhole camera.

[0021] It should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0022] The detailed descriptions listed above are merely specific descriptions of feasible implementations of this utility model, and are not intended to limit the scope of protection of this utility model. All equivalent implementations or modifications made without departing from the spirit of this utility model should be included within the scope of protection of this utility model.

Claims

1. A borehole television imaging device with heat insulation and smoke extraction function, characterized in that, The system includes a downhole probe assembly; the downhole probe assembly includes a cylindrical downhole probe, with a heat insulation cavity coaxially arranged on the outer periphery of the downhole probe. The heat insulation cavity is annular and filled with cooling liquid. The bottom end of the heat insulation cavity is aligned with the downhole probe. The height of the heat insulation cavity is higher than that of the downhole probe. A second support plate and a first support plate are arranged at intervals from bottom to top inside the part of the heat insulation cavity that is higher than the downhole probe. The second support plate and the first support plate are provided with wire-passing holes. A triangular bracket is fixed at the top of the heat insulation cavity, and a wire-passing hole is opened at the center of the top of the triangular bracket. Several vertical smoke exhaust channels are evenly spaced along the circumference in the heat insulation cavity. The bottom end of the vertical smoke exhaust channel is flush with the bottom end of the heat insulation cavity, and the top end extends beyond the second support plate and communicates with the horizontal smoke exhaust channels arranged radially along the heat insulation cavity. The multiple horizontal smoke exhaust channels converge towards the bottom end of the smoke exhaust collection port. A smoke exhaust fan is arranged at the center of the first support plate.

2. The borehole television imaging device according to claim 1, characterized in that, It also includes a ground imaging component and a transmission cable; the downhole probe component is connected to the ground imaging component via the transmission cable; the ground imaging component includes a take-up and take-up roller and a main unit, one end of the transmission cable is connected to the main unit, and the other end is connected to the downhole probe component after being wound up by the take-up roller.

3. The borehole television imaging device according to claim 2, characterized in that, The main unit is equipped with a display screen, which can display images captured by the downhole probe assembly. The main unit can store the images captured by the downhole probe assembly. The main unit includes a power supply and a positioning pulley assembly. The positioning pulley assembly is a bracket equipped with fixed pulleys, which is placed at the borehole opening to facilitate positioning the transmission cable for lowering the downhole probe assembly.

4. The borehole television imaging device according to claim 1, characterized in that, The camera is located at the center of the lower end of the downhole probe, and several LED lighting beads are evenly arranged around the camera.

5. The borehole television imaging device according to claim 2 or 3, characterized in that, The inner diameter of the heat insulation cavity is the same as the outer diameter of the downhole probe. The second support plate and the first support plate are circular plates with outer diameters consistent with the inner diameter of the heat insulation cavity.

6. The borehole television imaging device according to claim 5, characterized in that, The transmission cable passes through the wire hole of the triangular bracket, the wire hole on the first support plate, and the wire hole on the second support plate in sequence before connecting to the top of the downhole probe; the downhole probe is located in the heat insulation cavity, below the second support plate.

7. The borehole television imaging device according to claim 6, characterized in that, The smoke exhaust collection port is shaped like an inverted frustum, and both the smoke exhaust collection port and the smoke exhaust fan are arranged coaxially with the heat insulation cavity; wherein, the smoke exhaust fan is powered by a transmission cable.

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