Downhole transient electromagnetic auxiliary support

Abstract

The utility model discloses a kind of underground transient electromagnetic auxiliary support, including instrument body and outer box, the instrument body is movably placed in outer box inside, the outer box is rectangular structure, and the upper portion of outer box is provided with accommodating cavity.The utility model relates to the technical field of transient electromagnetic testing, when not using instrument body, instrument body is stored in the accommodating cavity of outer box, elastic limiting structure can protect instrument body, when needing to use instrument body, device is erected on ground by supporting structure, instrument body is taken out from accommodating cavity, can be temporarily placed on ground, device is inverted and rotated 180 degrees, so that placing groove is upward, device is again erected on ground by supporting structure, instrument body is transferred from ground to placing groove, instrument body does not need to be placed on ground for a long time, reduce the wear degree between instrument body and ground.

Description

Technical Field

[0001] This utility model relates to the field of transient electromagnetic testing technology, specifically to a downhole transient electromagnetic auxiliary support. Background Technology

[0002] Transient electromagnetic methods, as an important geophysical exploration technique, are widely used in underground coal mines for hydrogeological structural detection, locating water sources in disaster areas, and evaluating the water-bearing properties of the roof and floor of the working face. Transient electromagnetic instruments, as commonly used equipment, are characterized by their portability, high efficiency, and strong anti-interference capabilities, making them suitable for complex underground environments.

[0003] However, the confined space, uneven ground, and dusty, damp conditions in underground operations make it difficult to place transient electromagnetic instruments. These instruments are typically placed directly on the ground, but the underground surface often contains gravel, water, or is tilted. Direct placement of the instrument can cause it to slip or wear, reducing its lifespan and potentially introducing measurement errors.

[0004] While existing technologies may already offer solutions to the aforementioned problems, this case aims to provide an alternative or replacement technical solution. Utility Model Content

[0005] To address the problems mentioned in the background art, this utility model provides the following technical solution: A downhole transient electromagnetic auxiliary support includes an instrument body and an outer casing. The instrument body is movably placed inside the outer casing. The outer casing has a rectangular structure. An accommodating cavity is provided on the top of the outer casing, and a placement groove is provided on the bottom of the outer casing. A support structure is installed on the outer wall of the outer casing, and elastic limiting structures are installed on the four inner walls of the accommodating cavity. The support structure includes four internal threaded sleeves, which are symmetrically installed in pairs on the outer wall of the outer box. Each internal threaded sleeve is movably fitted with a support leg. Each of the legs includes a central rod, with threaded posts installed at both ends of the central rod. A base is installed at one end of each threaded post, and the diameter of the central rod is smaller than the diameter of the threaded post.

[0006] Preferably, the elastic limiting structure includes an airbag, which is installed on the inner wall of the outer casing. An air tube is sealed and inserted into the airbag, and a sealing cap is movably fitted onto one end of the air tube via a thread. A limiting band is movably fitted onto the outer wall of the airbag.

[0007] Preferably, the limiting band includes an elastic band, the two ends of which are fixedly attached to the inner wall of the outer casing and located on both sides of the airbag, and multiple rigid strips are embedded inside the elastic band.

[0008] Preferably, a lid is movably fitted onto the outer casing, and a T-shaped retaining strip is installed on the upper wall of the lid. Each internally threaded sleeve has a retaining groove on its outer wall that matches the retaining strip box.

[0009] Preferably, two crossbars are symmetrically installed on the outer side wall of the outer casing, and shoulder straps are movably fitted on the two crossbars. The shoulder straps have keyholes.

[0010] Preferably, each of the crossbars is fixedly fitted with two baffles.

[0011] Beneficial effects This utility model provides a downhole transient electromagnetic auxiliary support, which has the following advantages compared with the prior art: When not in use, the instrument body is stored in the accommodating cavity of the outer casing. The elastic limiting structure protects the instrument body. When the instrument body needs to be used, the device is placed on the ground via the support structure, and the instrument body is removed from the accommodating cavity. It can be briefly placed on the ground, then the device is inverted and rotated 180 degrees so that the placement groove faces upward. The device is then placed back on the ground via the support structure, and the instrument body is transferred from the ground to the placement groove. This eliminates the need for the instrument body to be placed on the ground for extended periods, reducing wear between the instrument body and the ground. The support structure uses four adjustable legs, which, through the engagement of threaded rods at both ends and internal threaded sleeves, can adjust the height and level of the support, adapting to the uneven ground environment underground and preventing the instrument body from shaking during use due to uneven ground, thus ensuring measurement quality. Attached Figure Description

[0012] Figure 1 This is a three-dimensional exploded structural diagram of a downhole transient electromagnetic auxiliary support according to the present invention.

[0013] Figure 2 This is a schematic diagram of the overall three-dimensional structure of a downhole transient electromagnetic auxiliary support according to the present invention.

[0014] Figure 3 This is a side sectional view of the structure of a downhole transient electromagnetic auxiliary support according to the present invention.

[0015] Figure 4 This is a top sectional view of the limiting band of a downhole transient electromagnetic auxiliary support according to the present invention.

[0016] Figure 5 This is a schematic diagram of the matching state of the clip and slot of a downhole transient electromagnetic auxiliary support according to the present invention.

[0017] In the diagram: 1. Instrument body, 2. Outer casing, 3. Receiving cavity, 4. Placement groove, 5. Internal threaded sleeve, 6. Intermediate rod, 7. Threaded column, 8. Base, 9. Airbag, 10. Air tube, 11. Sealing cap, 12. Elastic band, 13. Rigid strip, 14. Box cover, 15. Locking strip, 16. Locking groove, 17. Crossbar, 18. Shoulder strap, 19. Locking hole, 20. Baffle plate. Detailed Implementation

[0018] Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0019] Example: Please refer to Figure 1-5 To address the issue that transient electromagnetic instruments are typically placed directly on the ground, where there are often gravel, water accumulation, or inclines, direct placement of the instrument can easily lead to slippage or wear, reducing equipment lifespan and potentially causing measurement errors. This technical solution is designed, and the detailed technical solution is as follows. A downhole transient electromagnetic auxiliary support includes an instrument body 1 and an outer casing 2. The instrument body 1 is movably placed inside the outer casing 2. The outer casing 2 has a rectangular structure. An accommodating cavity 3 is provided on the top of the outer casing 2. A placement groove 4 is provided on the bottom of the outer casing 2. A support structure is installed on the outer wall of the outer casing 2. Elastic limiting structures are installed on the four inner walls of the accommodating cavity 3. It should be noted that the specific structure and working principle of the instrument body 1 can be referred to the YCS200(B) intrinsically safe transient electromagnetic instrument for mining, which is existing technology and will not be described in detail here. When the instrument body 1 is not in use, it is stored in the accommodating cavity 3 of the outer box 2, which can protect the instrument body 1. When the instrument body 1 needs to be used, the device is placed on the ground by the support structure, and the instrument body 1 is taken out from the accommodating cavity 3. It can be placed on the ground briefly, and the device is inverted and rotated 180 degrees so that the placement groove 4 faces upward. The device is then placed on the ground again by the support structure, and the instrument body 1 is transferred from the ground to the placement groove 4. This eliminates the need for the instrument body 1 to be placed on the ground for a long time, reduces the wear between the instrument body 1 and the ground, and also prevents the instrument body 1 from shaking during use due to uneven ground, thus ensuring the measurement quality. Specifically, the support structure includes four internal threaded sleeves 5, which are symmetrically installed in pairs on the outer wall of the outer box 2. Each internal threaded sleeve 5 is movably inserted with a support leg. Each support leg includes a middle rod 6, and threaded posts 7 are installed at both ends of the middle rod 6. A foot 8 is installed at one end of the threaded post 7. The diameter of the middle rod 6 is smaller than the diameter of the threaded post 7. It should be noted that the staff can rotate the outriggers to make the threaded column 7 rotate in the internal threaded sleeve 5, thereby adjusting the height of the outriggers and making the outriggers stand on the ground, so that the device can be placed stably on the ground. When it is necessary to raise the instrument body 1, the outriggers can be rotated to make the threaded column 7 located below disengage from the internal threaded sleeve 5, and then the intermediate rod 6 can be moved in the internal threaded sleeve 5 until the threaded column 7 located above is screwed into the internal threaded sleeve 5. The device stands on the ground with the outriggers, which increases the distance between the outer box 2 and the ground, and is suitable for use in the uneven downhole environment. Specifically, the elastic limiting structure includes an airbag 9, which is installed on the inner wall of the outer casing 2. An air tube 10 is sealed and inserted into the airbag 9. One end of the air tube 10 is fitted with a sealing cap 11 through a threaded sleeve. A limiting band is movably attached to the outer wall of the airbag 9. Specifically, the limiting band includes an elastic band 12, the two ends of which are fixedly attached to the inner wall of the outer box 2 and located on both sides of the airbag 9. Multiple rigid strips 13 are embedded inside the elastic band 12. It should be noted that when no air is injected into the airbag 9, the airbag 9 is compressed against the inner wall of the outer box 2 under the restraint of the elastic band 12. After the instrument body 1 is placed into the accommodating cavity 3, air can be injected into the airbag 9 through the air tube 10 until the airbag 9 expands and pushes the elastic band 12 to undergo elastic deformation and contact the instrument body 1, until the elastic limiting structure is attached to all four sides of the instrument body 1. The rigid strip 13 inside the limiting band can be made of PVC material to prevent the elastic band 12 from curling, so that the airbag 9 forms a regular shape. The instrument body 1 is fixed in the center of the accommodating cavity 3 by uniform pressure, which avoids damage to the instrument body 1 due to collision during the handling of the device. Specifically, the outer box 2 is fitted with a lid 14, and the upper wall of the lid 14 is fitted with a T-shaped retaining strip 15. Each internal threaded sleeve 5 is fitted with a groove 16 on its outer wall that matches the retaining strip 15. It should be noted that the case cover 14 is used to cover and seal the outer box 2. When the instrument body 1 needs to be taken out, the case cover 14 is removed from the outer box 2, and the locking strip 15 on the case cover 14 is movably inserted into the locking slot 16. There is no need to place the case cover 14 on the ground to avoid wear and tear between the case cover 14 and the ground. As a preferred and further option, two crossbars 17 are symmetrically installed on the outer side wall of the outer casing 2. Shoulder straps 18 are movably fitted on the two crossbars 17. The shoulder straps 18 have keyholes 19. Two baffles 20 are fixedly fitted on each crossbar 17. It should be noted that when the device needs to be moved, the shoulder strap 18 can be fitted onto the crossbar 17 through the pull hole on it. The baffle 20 matches the large diameter end of the locking hole 19, and the crossbar 17 matches the small diameter end of the locking hole 19. The baffle 20 is used to prevent the shoulder strap 18 from falling off the crossbar 17.

[0020] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A downhole transient electromagnetic auxiliary support, comprising an instrument body (1) and an outer casing (2), wherein the instrument body (1) is movably placed inside the outer casing (2), characterized in that, The outer box (2) is a rectangular structure. A cavity (3) is provided above the outer box (2). A placement groove (4) is provided below the outer box (2). A support structure is installed on the outer wall of the outer box (2). An elastic limiting structure is installed on the inner four walls of the cavity (3). The support structure includes four internal threaded sleeves (5), which are symmetrically installed in pairs on the outer wall of the outer box (2). Each internal threaded sleeve (5) is movably fitted with a support leg. Each of the legs includes a middle rod (6), and threaded posts (7) are installed at both ends of the middle rod (6). A foot (8) is installed at one end of the threaded post (7). The diameter of the middle rod (6) is smaller than the diameter of the threaded post (7).

2. The downhole transient electromagnetic auxiliary support according to claim 1, characterized in that, The elastic limiting structure includes an airbag (9), which is installed on the inner wall of the outer box (2). An air tube (10) is sealed and inserted on the airbag (9). One end of the air tube (10) is fitted with a sealing cap (11) through a threaded sleeve. A limiting band is movably attached to the outer wall of the airbag (9).

3. The downhole transient electromagnetic auxiliary support according to claim 2, characterized in that, The limiting band includes an elastic band (12), the two ends of which are fixedly attached to the inner wall of the outer box (2) and located on both sides of the airbag (9). Multiple rigid strips (13) are embedded inside the elastic band (12).

4. The downhole transient electromagnetic auxiliary support according to claim 1, characterized in that, The outer box (2) is fitted with a box cover (14), and the upper wall of the box cover (14) is fitted with a T-shaped clip (15). Each inner threaded sleeve (5) has a groove (16) on its outer wall that matches the clip (15).

5. The downhole transient electromagnetic auxiliary support according to claim 1, characterized in that, Two crossbars (17) are symmetrically installed on the outer side wall of the outer box (2). Shoulder straps (18) are movably fitted on the two crossbars (17). The shoulder straps (18) have a locking hole (19) in the shape of a keyhole.

6. A downhole transient electromagnetic auxiliary support according to claim 5, characterized in that, Two baffles (20) are fixedly fitted on each of the crossbars (17).

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