Receiving device for geophysical prospecting through tunnel electromagnetic method

Abstract

The utility model discloses a receiving device for geophysical prospecting by an underground tunnel electromagnetic method, which comprises an electromagnetic wave receiving device body, and the electromagnetic wave receiving device body comprises an anti-interference cover body of which the outer side is of a rectangular structure, and an electromagnetic probe main body and a filter which are respectively and fixedly arranged on the inner walls of the bottom and the top of the anti-interference cover body. The outer side of the anti-interference cover body is provided with a self-adaptive adjustment supporting and protecting mechanism. The self-adaptive adjusting supporting and protecting mechanism comprises a spherical sleeve with the top and the bottom being open. According to the utility model, a series of structures are arranged, so that the blind slot of the electromagnetic probe main body can be conveniently and quickly leveled in a manner of simply pulling and matching with the counterweight, personnel do not need to independently adjust positions one by one and observe and judge, the operation is simple and convenient, and the adjusting efficiency, convenience and accuracy are improved; the electromagnetic probe main body can be moved out to be close to the ground during use and can be stored and protected after use, and the use flexibility is improved while the safety of the magnetic probe main body during carrying is ensured.

Description

Technical Field

[0001] This utility model relates to the field of geophysical receiving equipment technology, specifically a receiving device for tunnel electromagnetic geophysical exploration. Background Technology

[0002] Geophysical exploration is an effective method for detecting the reserves and structures of underground coal seams, metallic minerals, water resources, and other resources. In surface geophysical exploration, transient electromagnetic methods are generally used to effectively detect the structure of underground coal seams, and are widely used in geophysical prospecting and mine hydrogeology and environmental geology. In actual exploration work, transient electromagnetic wave receiving probes play a key role in receiving and carrying first-hand geological exploration information and are the main components of electromagnetic detectors. In actual exploration, due to the environment such as tunnels, unevenness is inevitable, making it difficult to place the probe in a completely horizontal state during detection. This results in the collected data not accurately reflecting the true situation of the underground geological body, producing false anomalies in subsequent data processing, and affecting the accuracy of geophysical exploration.

[0003] According to the novel structure search report, announcement number CN212410880 discloses an anti-interference electromagnetic wave receiving probe for geophysical exploration, including a housing and a probe body. The probe body is embedded in the bottom of the housing. A filter is connected to the housing above the probe body via a connecting rod. An anti-interference cover is provided at the top of the housing. Sleeves are connected to the front and rear ends of the left and right side walls of the housing, respectively. Support legs are slidably arranged on the lower inner side wall of the sleeves. Bolt rods are threaded inside the support legs. The upper end of the bolt rods passes through the upper side wall of the sleeves and is connected to a knob. By setting a filter inside the housing, other frequency components can be filtered out when the probe body is performing detection, avoiding the influence of other frequencies on geophysical exploration. By setting a retractable support leg in the sleeve, the housing can remain horizontal even in rugged terrain, ensuring the accuracy of data measurement.

[0004] The aforementioned technology discloses an anti-interference electromagnetic wave receiving probe for geophysical exploration, which features four independently adjustable support legs for leveling operations on uneven tunnel interiors. With its built-in filter and anti-interference enclosure, it is suitable for use in environments prone to interference, such as tunnels. However, it still has the following shortcomings in practical application:

[0005] 1. The method of leveling by raising and lowering the four support legs individually requires manual adjustment and observation of each position, which is cumbersome and cannot facilitate quick and convenient leveling of the probe body in the blind slot. The convenience and efficiency of adjustment are not ideal. 2. The probe body is directly embedded in the lower part of the inner side of the housing. In some detection environments, it is necessary to bring the probe body close to or against the ground, but the housing is raised by the support legs and cannot be brought close to or against the ground. It is not possible to move the probe body out and in according to the needs of use, which is not ideal in terms of usage flexibility. In view of this, this application proposes a receiving device for tunnel electromagnetic geophysical exploration to solve the above-mentioned problems. Utility Model Content

[0006] The purpose of this invention is to provide a receiving device for electromagnetic geophysical exploration in tunnels, so as to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a receiving device for tunnel electromagnetic geophysical exploration, comprising an electromagnetic wave receiving device body, the electromagnetic wave receiving device body comprising an anti-interference cover with a rectangular outer structure and an electromagnetic probe body and a filter respectively fixedly installed on the bottom and top inner walls of the anti-interference cover, and an adaptive adjustment support and protection mechanism installed on the outer side of the anti-interference cover.

[0008] The adaptive adjustment support and protection mechanism includes a spherical sleeve with openings at the top and bottom. Each of the four sides of the spherical sleeve is fixedly connected to an inclined L-shaped support rod. A universal ball is movably fitted inside the spherical sleeve. A counterweight sleeve with a rectangular inner side is fixedly connected to the bottom of the universal ball. A rectangular storage groove communicating with the inner side of the counterweight sleeve is opened at the bottom of the universal ball. An anti-interference cover is slidably fitted within the counterweight sleeve and the rectangular storage groove. The rectangular storage groove and counterweight sleeve are used to store and protect the electromagnetic probe body when not in use. The counterweight sleeve automatically rotates downwards to a vertical position and drives the universal ball to adaptively rotate when the universal ball is not fixed or when the overall position is tilted, thereby achieving the effect of further driving the electromagnetic probe body to automatically rotate to a horizontal position through the anti-interference cover.

[0009] The top of both sides of the spherical sleeve is fixedly connected to the same U-shaped rod, and the top of the U-shaped rod is fixedly connected to a first U-shaped handle. The top of the universal ball is in contact with an elastic clamping component for pressing and fixing it to prevent swaying. The U-shaped rod is slidably sleeved on the elastic clamping component. A threaded lifting component for adjusting the height of the anti-interference cover is fixedly connected between the top of the anti-interference cover and the inner wall of the rear side of the rectangular storage slot. The elastic clamping component is used to press and fix the universal ball to prevent swaying and to facilitate unlocking. The threaded lifting component is used to adjust the height of the anti-interference cover and the electromagnetic probe body, so as to remove it to the ground during use and to recycle and store it after use.

[0010] Preferably, the elastic compression assembly includes a U-shaped pressure rod, with anti-slip rubber blocks fixedly connected to both sides of the bottom of the U-shaped pressure rod. The top sides of the universal ball are respectively pressed and contacted with the bottom of the corresponding anti-slip rubber blocks. A second U-shaped handle located inside the first U-shaped handle is fixedly connected to the top of the U-shaped pressure rod. The U-shaped rod is slidably sleeved on the second U-shaped handle. Two compression springs in a compressed state are fixedly connected between the top of the U-shaped pressure rod and the inner wall of the top of the U-shaped rod. The compression springs are movably sleeved on the second U-shaped handle.

[0011] Preferably, the threaded lifting assembly includes a support fixedly connected to the inner wall of the rear side of the rectangular storage slot, a T-shaped screw is rotatably fitted on the top of the support, an internal threaded sleeve is fixedly connected to the top of the anti-interference cover, the internal threaded sleeve is threaded onto the T-shaped screw, and the top of the T-shaped screw penetrates the inner side of the U-shaped pressure rod and extends above it.

[0012] Preferably, each of the four inner walls of the spherical sleeve has two anti-wear balls that are movably nested therein, and the eight anti-wear balls movably surround and fit against the outside of the universal ball.

[0013] Preferably, the bottom of the electromagnetic probe body is higher than the bottom of the counterweight sleeve, and the outer side of the counterweight sleeve is circular.

[0014] Preferably, the top inner wall of the rectangular storage slot is provided with a movable through hole, and the T-shaped screw is located inside the movable through hole and does not contact the inner side of the movable through hole.

[0015] Preferably, the top of the support has a circular hole, and a bearing is fixedly fitted inside the circular hole. The inner side of the inner ring of the bearing is fixedly connected to the outer side of the T-shaped screw.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] 1. By using a combination of spherical sleeve, anti-wear ball bearings, universal ball bearings, L-shaped support rods, counterweight sleeves, elastic clamping components, and U-shaped rods, when unevenness occurs during application in the tunnel, self-adaptive leveling can be achieved by simply pulling the counterweight. This allows for convenient and quick leveling of the blind slot of the electromagnetic probe body, eliminating the need for personnel to adjust and observe each position individually. The operation is simple, improving adjustment efficiency, convenience, and accuracy.

[0018] 2. Through the combination of the counterweight sleeve, rectangular storage slot, threaded lifting assembly, anti-interference cover, electromagnetic probe body and filter, the electromagnetic probe body can be moved out and close to the ground for receiving work during use, and can be stored and protected after use, improving the flexibility of use while ensuring the safety of the electromagnetic probe body when not in use through mobile storage.

[0019] This utility model features a series of structures that allow for convenient and quick leveling of the electromagnetic probe body's blind slot through simple pulling and counterweight adjustment. This eliminates the need for personnel to adjust and observe each position individually, simplifying operation and improving adjustment efficiency, convenience, and accuracy. It also facilitates the removal of the electromagnetic probe body from the ground during use and its safe storage after use, ensuring the safety of the probe body while enhancing its flexibility of use. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the receiving device for tunnel electromagnetic geophysical exploration proposed in this utility model;

[0021] Figure 2 for Figure 1 A schematic diagram of the structure viewed from below;

[0022] Figure 3 This is a schematic diagram of the main cross-sectional structure of a receiving device for tunnel electromagnetic geophysical exploration proposed in this utility model.

[0023] In the diagram: 1. Anti-interference cover; 101. Electromagnetic probe body; 102. Filter; 2. Spherical sleeve; 201. L-shaped support rod; 202. Universal ball; 203. Anti-wear ball; 3. Rectangular storage slot; 301. Counterweight sleeve; 4. Internal threaded sleeve; 401. Support; 402. T-shaped screw; 403. Movable perforation; 5. Second U-shaped handle; 501. Recurved pressure rod; 502. Compression spring; 503. Anti-slip rubber block; 6. U-shaped rod; 601. First U-shaped handle. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] like Figures 1 to 3 As shown, the receiving device for tunnel electromagnetic geophysical exploration proposed in this embodiment includes an electromagnetic wave receiving device body. The electromagnetic wave receiving device body includes an anti-interference cover 1 with a rectangular outer structure, and an electromagnetic probe body 101 and a filter 102 respectively fixedly installed on the bottom and top inner walls of the anti-interference cover 1. An adaptive adjustment support and protection mechanism is installed on the outer side of the anti-interference cover 1.

[0026] The adaptive adjustment support and protection mechanism includes a spherical sleeve 2 with openings at both the top and bottom. L-shaped support rods 201 are fixedly connected to all four sides of the spherical sleeve 2 at an angle. A universal ball 202 is movably fitted inside the spherical sleeve 2. A counterweight sleeve 301 with a rectangular inner side is fixedly connected to the bottom of the universal ball 202. A rectangular storage groove 3, communicating with the inner side of the counterweight sleeve 301, is opened at the bottom of the universal ball 202. The anti-interference cover 1 is slidably fitted within the counterweight sleeve 301 and the rectangular storage groove 3. The bottom position of the electromagnetic probe body 101 is higher than the bottom position of the counterweight sleeve 301. The outer side of the counterweight sleeve 301 is circular. Two anti-wear balls 2 are movably nested on the inner walls of all four sides of the spherical sleeve 2. 03. Eight anti-wear balls 203 are dynamically surrounded and fitted to the outside of the universal ball 202; the rectangular storage groove 3 and the counterweight sleeve 301 are used to store and protect the electromagnetic probe body 101 when not in use. The counterweight sleeve 301 is used to automatically rotate downwards to vertical when the universal ball 202 is not fixed or when the overall position is tilted, thereby driving the universal ball 202 to rotate adaptively. This achieves the effect of driving the electromagnetic probe body 101 to automatically rotate to horizontal through the anti-interference cover 1. The anti-wear balls 203 are used to reduce the friction when the universal ball 202 rotates, so as to ensure that it can rotate smoothly and adaptively, and avoid friction jamming that affects the adjustment.

[0027] The top of both sides of the spherical sleeve 2 is fixedly connected to the same U-shaped rod 6. The top of the U-shaped rod 6 is fixedly connected to the first U-shaped handle 601. The top of the universal ball 202 is in contact with an elastic clamping component for clamping and preventing swaying. The U-shaped rod 6 is slidably sleeved on the elastic clamping component. A threaded lifting component for adjusting the height of the anti-interference cover 1 is fixedly connected between the top of the anti-interference cover 1 and the inner rear wall of the rectangular storage slot 3. The elastic clamping component is used to clamp and prevent swaying of the universal ball 202 and to facilitate unlocking. The threaded lifting component is used to adjust the height of the anti-interference cover 1 and the electromagnetic probe body 101 for removal and placement on the ground during use and for recycling and storage after use.

[0028] Specifically, the elastic compression assembly includes a U-shaped pressure rod 501, with anti-slip rubber blocks 503 fixedly connected to both sides of the bottom of the U-shaped pressure rod 501. The top sides of the universal ball 202 are pressed tightly against the bottom of the corresponding anti-slip rubber blocks 503. A second U-shaped handle 5 located inside the first U-shaped handle 601 is fixedly connected to the top of the U-shaped pressure rod 501. A U-shaped rod 6 is slidably sleeved on the second U-shaped handle 5. The top of the U-shaped rod 6 has two vertical guide holes that slide in contact with the outer side of the second U-shaped handle 5, serving to guide the vertical sliding of the second U-shaped handle 5. Two compression springs 502 in a compressed state are fixedly connected between the top of the U-shaped pressure rod 501 and the inner wall of the top of the U-shaped rod 6. The compression spring 502 is movably sleeved on the second U-shaped handle 5. The provided loop pressure rod 501, anti-slip rubber block 503, second U-shaped handle 5 and compression spring 502 cooperate to use the compression spring 502 in a compressed state to elastically tighten the loop pressure rod 501 downwards, so that the loop pressure rod 501 drives the two anti-slip rubber blocks 503 to press and fix the universal ball 202 to prevent wobbling. Pulling the second U-shaped handle 5 upwards will move the loop pressure rod 501 upwards and continue to compress the two compression springs 502. The loop pressure rod 501 drives the two anti-slip rubber blocks 503 upwards to separate from the universal ball 202, releasing the locking work. After unlocking, the counterweight sleeve 301 can be used directly for adaptive and rapid leveling.

[0029] Furthermore, the threaded lifting assembly includes a support 401 fixedly connected to the inner rear wall of the rectangular storage slot 3. A T-shaped screw 402 is rotatably fitted onto the top of the support 401. A circular hole is provided at the top of the support 401, and a bearing is fixedly fitted inside the hole. The inner ring of the bearing is fixedly connected to the outer side of the T-shaped screw 402, thus enabling the T-shaped screw 402 to be rotated and installed. An internal threaded sleeve 4 is fixedly connected to the top of the anti-interference cover 1. The internal threaded sleeve 4 is threaded onto the T-shaped screw 402. The threaded connection between the T-shaped screw 402 and the internal threaded sleeve 4 facilitates the upward and downward displacement of the internal threaded sleeve 4 when the T-shaped screw 402 rotates. The top of 02 extends through the inner side of the U-shaped pressure rod 501 and above it. A movable through hole 403 is provided on the inner wall of the top of the rectangular storage groove 3. The T-shaped screw 402 is located in the movable through hole 403 and does not contact the inner side of the movable through hole 403, so that the T-shaped screw 402 can move through. The support 401, the T-shaped screw 402 and the internal threaded sleeve 4 are matched. When the T-shaped screw 402 is rotated, the internal threaded sleeve 4 moves down or up. The internal threaded sleeve 4 drives the anti-interference cover 1 and the electromagnetic probe body 101 to adjust their height. This achieves the effect of driving the electromagnetic probe body 101 to move down when in use and moving it up for storage after use.

[0030] The usage method of this embodiment is as follows: When used in a tunnel, if the entire device is tilted due to uneven ground conditions, the operator pulls the second U-shaped handle 5 upwards. The second U-shaped handle 5 moves the return lever 501 upwards, further compressing the two compression springs 502. The return lever 501 causes the two anti-slip rubber blocks 503 to separate upwards from the universal ball 202, releasing the locking mechanism of the universal ball 202. At this time, under its own weight, the counterweight sleeve 301 automatically rotates downwards to a vertical position, causing the universal ball 202 to rotate adaptively among the eight anti-wear balls 203. At this time, the counterweight sleeve 301 drives the anti-interference mechanism. When the cover 1 is rotated to a horizontal position, the anti-interference cover 1 drives the electromagnetic probe body 101 to automatically rotate to a horizontal position. Then, the tension on the second U-shaped handle 5 is released. At this time, the elastic force of the compression spring 502, which is in a compressed state, drives the return rod 501 to move down. The return rod 501 drives the anti-slip rubber block 503 to press down on the universal ball 202 to prevent swaying, thus achieving the fixed position after adjustment. By simply pulling and cooperating with the counterweight, the self-adaptive leveling method is achieved, realizing the effect of convenient and quick leveling of the blind groove of the electromagnetic probe body 101. There is no need for personnel to adjust and observe each position individually. The operation is simple and improves the adjustment efficiency, convenience and accuracy.

[0031] When the electromagnetic probe body 101 needs to be moved out for ground-level use, the operator rotates the T-shaped screw 402 forward to drive the internal threaded sleeve 4 to move downward. The internal threaded sleeve 4 causes the anti-interference cover 1 to slide downward within the counterweight sleeve 301. The anti-interference cover 1 then causes the electromagnetic probe body 101 to move downward and fit or be close to the ground. Then, it can be used in conjunction with an external host for receiving electromagnetic geophysical data. During use, the filter 102 is used in conjunction with the anti-interference cover 1 for anti-interference. The electromagnetic probe body 101 in conjunction with the external host for receiving electromagnetic geophysical data and the filter 102 in conjunction with the anti-interference cover 1 for anti-interference are existing technologies and have been disclosed in announcement number CN212410880, so they will not be elaborated further.

[0032] After use, the T-shaped screw 402 is rotated in the opposite direction to drive the internal threaded sleeve 4 to move upward. The internal threaded sleeve 4 drives the anti-interference cover 1 and the electromagnetic probe body 101 to move upward, so that they are respectively moved upward and stored in the rectangular storage slot 3 and the counterweight sleeve 301. This achieves the effect of moving the electromagnetic probe body 101 close to the ground when in use and storing and protecting it after use. This improves the flexibility of use while ensuring the safety of the electromagnetic probe body 101 when not in use by using the movable storage.

[0033] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A receiving device for tunnel electromagnetic geophysical exploration, comprising an electromagnetic wave receiving device body, wherein the electromagnetic wave receiving device body includes an anti-interference cover (1) with a rectangular outer structure, and an electromagnetic probe body (101) and a filter (102) respectively fixedly installed on the bottom and top inner walls of the anti-interference cover (1), characterized in that: An adaptive adjustment support and protection mechanism is installed on the outside of the anti-interference cover (1); The adaptive adjustment support and protection mechanism includes a spherical sleeve (2) with openings at the top and bottom. The four sides of the spherical sleeve (2) are fixedly connected with inclined L-shaped support rods (201). A universal ball (202) is movably fitted inside the spherical sleeve (2). A counterweight sleeve (301) with a rectangular inner side is fixedly connected to the bottom of the universal ball (202). A rectangular storage groove (3) is opened at the bottom of the universal ball (202) and communicates with the inner side of the counterweight sleeve (301). The anti-interference cover (1) is slidably fitted inside the counterweight sleeve (301) and the rectangular storage groove (3). The top of both sides of the spherical sleeve (2) is fixedly connected to the same U-shaped rod (6), the top of the U-shaped rod (6) is fixedly connected to the first U-shaped handle (601), the top of the universal ball (202) is in contact with an elastic clamping component for clamping and preventing swaying, the U-shaped rod (6) is slidably sleeved on the elastic clamping component, and a threaded lifting component for adjusting the lifting of the anti-interference cover (1) is fixedly connected between the top of the anti-interference cover (1) and the inner wall of the rear side of the rectangular storage groove (3).

2. The receiving device for tunnel electromagnetic geophysical exploration according to claim 1, characterized in that: The elastic compression assembly includes a U-shaped pressure bar (501), with anti-slip rubber blocks (503) fixedly connected to both sides of the bottom of the U-shaped pressure bar (501). The top sides of the universal ball (202) are pressed tightly against the bottom of the corresponding anti-slip rubber blocks (503). A second U-shaped handle (5) located inside the first U-shaped handle (601) is fixedly connected to the top of the U-shaped pressure bar (501). The U-shaped rod (6) is slidably sleeved on the second U-shaped handle (5). Two compression springs (502) in a compressed state are fixedly connected between the top of the U-shaped pressure bar (501) and the top inner wall of the U-shaped rod (6). The compression springs (502) are movably sleeved on the second U-shaped handle (5).

3. A receiving device for tunnel electromagnetic geophysical exploration according to claim 2, characterized in that: The threaded lifting assembly includes a support (401) fixedly connected to the inner wall of the rear side of the rectangular storage groove (3). A T-shaped screw (402) is rotatably fitted on the top of the support (401). An internal threaded sleeve (4) is fixedly connected to the top of the anti-interference cover (1). The internal threaded sleeve (4) is threaded onto the T-shaped screw (402). The top of the T-shaped screw (402) penetrates the inner side of the spiral pressure rod (501) and extends above it.

4. A receiving device for tunnel electromagnetic geophysical exploration according to claim 1, characterized in that: The spherical sleeve (2) has two anti-wear balls (203) movably nested on each of its four inner walls, and the eight anti-wear balls (203) movably surround and fit against the outside of the universal ball (202).

5. A receiving device for tunnel electromagnetic geophysical exploration according to claim 1, characterized in that: The bottom of the electromagnetic probe body (101) is higher than the bottom of the counterweight sleeve (301), and the outer side of the counterweight sleeve (301) is circular.

6. A receiving device for tunnel electromagnetic geophysical exploration according to claim 3, characterized in that: The rectangular storage slot (3) has a movable through hole (403) on its top inner wall. The T-shaped screw (402) is located inside the movable through hole (403) and does not contact the inner side of the movable through hole (403).

7. A receiving device for tunnel electromagnetic geophysical exploration according to claim 3, characterized in that: The support (401) has a circular hole at its top, and a bearing is fixedly fitted inside the circular hole. The inner side of the inner ring of the bearing is fixedly connected to the outer side of the T-shaped screw (402).

Images