Pluggable sectional cable device for tunnel induced polarization advanced prediction

Abstract

The utility model provides a pluggable sectional cable device for tunnel induced polarization advanced prediction, relates to the technical field of electrical method advanced geological exploration, and aims to solve the problem that in the conventional tunnel electrical method exploration, a relatively long cable is adopted, so that a power supply electrode is kept at a certain distance, and the tunnel induced polarization advanced prediction cannot be realized. Cable winding, too large and too heavy wire transportation volume and the like inevitably occur, and the power supply cable cannot be efficiently and quickly arranged and collected; the device comprises a starting segmented cable, a tail end segmented cable and at least one middle segmented cable, two ends of each segmented cable are respectively provided with a first plug or a second plug, and the starting segmented cable, the tail end segmented cable and the middle segmented cable are spliced through the first plugs and the second plugs; according to the device, the cable is formed by plugging and unplugging the sectioned cable, the cable can be spliced according to the required length during detection, the power supply cable can be conveniently and efficiently arranged and collected, the cable winding is avoided, the transportation is convenient, and the detection efficiency is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electrical advanced geological detection, in particular to a pluggable segmented cable device used for tunnel induced polarization advance prediction. Background Art

[0002] The statements in this section merely provide background technical information related to the present invention and do not necessarily constitute prior art.

[0003] During the construction of water conservancy and transportation facilities, it was found that the types of geological disasters are becoming increasingly complex, and the factors causing disasters are numerous, which seriously threatens the construction safety of tunnel engineering. It is understood that when predicting poor geology in tunnels, the identification of water bodies is crucial. Effective identification of water bodies can largely avoid disasters caused by poor geology. The tunnel induced polarization detection technology has great advantages in the identification of water bodies and has been widely used in the prediction of unknown areas before tunnel construction.

[0004] At present, tunnel electrical detection is an important geophysical exploration method. During detection, electrodes need to be arranged for power supply and measurement. To achieve the target depth, the power supply electrodes need to be kept at a certain distance. This requires sufficiently long cables for electrical exploration in tunnels, which will lead to the following problems:

[0005] (1) The cables used in traditional electrical exploration are usually long and need to be straightened out during the layout process, which is not only time-consuming but also significantly reduces the efficiency of detection.

[0006] (2) Traditional electrical exploration cables are too large and too heavy to transport. They are too large to be placed in vehicles, and too heavy to be transported manually, consuming too much manpower.

[0007] (3) The traditional electrical exploration cable layout requires that the cables be laid out at a distance from the tunnel face at one time, which is cumbersome and time-consuming.

[0008] Therefore, how to efficiently and quickly lay out power supply cables has become a key issue that needs to be urgently addressed in order to improve the efficiency of tunnel electrical exploration. Utility Model Content

[0009] In view of the deficiencies in the prior art, the utility model provides a pluggable segmented cable device for advance prediction of induced polarization in tunnels. The segmented cables are spliced ​​by the pluggable segmented cable device, and the power supply cables are arranged efficiently and quickly, ensuring that when the induced polarization method is used for detection in tunnels, the power supply cables can be easy to transport, simple to arrange, and the poles can be switched quickly, thereby achieving efficient detection.

[0010] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0011] In a first aspect, a pluggable segmented cable device for advance prediction of tunnel induced polarization is disclosed, comprising: a starting segmented cable, an end segmented cable and at least one intermediate segmented cable;

[0012] Each intermediate segment cable is provided with a first plug and a second plug at both ends;

[0013] One end of the starting segment cable is connected to the transmitter, and the other end is connected to the first plug or the second plug of the adjacent middle segment cable;

[0014] The end of the terminal segment cable is connected to the electrode, and the other end is connected to the first plug or the second plug of the adjacent middle segment cable.

[0015] As a further technical solution, the first plug is a hollow cylinder, the inner side surface of the cylinder is provided with a groove as an external thread, and the first plug can move along the direction of the cable.

[0016] As a further technical solution, the second plug is a hollow cylinder with an opening at one end and a cover at the other end. The cover is provided with holes having the same number as the number of battery pins passing through the cable. The outer side surface of the cylinder is provided with a groove serving as an internal thread. The second plug is fixed to one end of the cable.

[0017] As a further technical solution, the radius of the first plug is greater than the radius of the second plug. When connected, the second plug is inserted into the first plug and fixed by external threads and internal threads.

[0018] As a further technical solution, the second plug is threadably connected to the cable.

[0019] As a further technical solution, when the number of the intermediate segment cables is greater than or equal to 2, the connected intermediate segment cables are connected via a first plug and a second plug.

[0020] As a further technical solution, one end of the transmitter is provided with an aviation plug, and one end of the starting segmented cable is connected to the aviation plug through the second plug.

[0021] As a further technical solution, the intermediate segmented cables are each provided with three electrode taps.

[0022] As a further technical solution, an electrode tap is provided at the tail of the terminal segmented cable.

[0023] As a further technical solution, the lengths of the starting segmented cable, the middle segmented cable and the end segmented cable are all equal, or the lengths of the starting segmented cable and the end segmented cable are equal and both are greater than the length of the middle segmented cable.

[0024] One or more technical solutions of the utility model have the following beneficial effects:

[0025] This embodiment provides a pluggable segmented cable device for advance prediction of tunnel induced polarization. Through the device, the cable is composed of segmented cables that can be plugged in and out. During detection, the cables can be spliced ​​according to the required length, which facilitates the arrangement of the cables.

[0026] In this embodiment, the segmented cables spliced ​​by the pluggable segmented cable device are each shorter in length, which will not cause cable entanglement, facilitates the arrangement and collection of cables, and improves detection efficiency.

[0027] In this embodiment, segmented cables are spliced ​​by pluggable segmented cable devices. Compared with traditional cables, they are smaller in size. When entering a tunnel with a smaller space, the number of segmented cables can be selected according to detection requirements, which facilitates transportation within the tunnel.

[0028] Advantages of additional aspects of the present invention will be partially given in the following description, and partially become apparent from the following description, or be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0030] Figure 1 This is a schematic diagram of the connection of segmented cables of a pluggable segmented cable device for advance prediction of tunnel induced polarization in this embodiment;

[0031] Figure 2 This is a schematic diagram of the structure of the first plug and the second plug of the segmented cable in this embodiment;

[0032] Figure 3 This is a schematic diagram of the electrode tap of the middle segmented cable in this embodiment;

[0033] Figure 4 This is a schematic diagram of the cable arrangement of a pluggable segmented cable device in this embodiment;

[0034] Among them, 1. first plug; 2. second plug; 3. electrode tap; 4. cylinder; 5. battery needle; 6. transmitter; 7. starting segmented cable; 8. middle segmented cable; 9. end segmented cable; 10. cable connection plug; 11. electrode. DETAILED DESCRIPTION

[0035] It should be noted that the following detailed descriptions are exemplary and are intended to provide further description of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0036] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present invention.

[0037] In the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0038] Embodiment 1

[0039] like Figure 1-Figure 4 As shown, in this embodiment, a pluggable segmented cable device for advance prediction of tunnel induced polarization is provided, comprising:

[0040] A starting segmented cable 7, an end segmented cable 9 and at least one intermediate segmented cable 8;

[0041] Each intermediate segmented cable 8 is provided with a first plug 1 and a second plug 2 at both ends;

[0042] One end of the starting segment cable 7 is connected to the transmitter 6, and the other end is connected to the first plug 1 or the second plug 2 of the adjacent middle segment cable 8;

[0043] An end of the terminal segment cable 9 is connected to an electrode, and the other end is connected to a first plug 1 or a second plug 2 of an adjacent middle segment cable 8 .

[0044] Through the above device, it is achieved that the cable is composed of segmented cables connected by plugging and unplugging the first plug and the second plug. During tunnel detection, the cables can be spliced ​​according to the required length, and the cables can be arranged efficiently and quickly.

[0045] like Figure 1 , Figure 2 As shown, in this embodiment, the first plug 1 is a hollow cylinder 4, and the inner side of the cylinder 4 is provided with a groove serving as an external thread. The first plug 1 can move along the direction of the cable and is used to fix the first plug on the segmented cable. At the same time, when connected, it is used to fix the internal thread of the second plug.

[0046] like Figure 1 , Figure 2 As shown, in this embodiment, the second plug 2 is a hollow cylinder with an opening at one end and a cover at the other end. The cover is provided with core holes whose number is the same as the number of the battery core needles 5 of the cable passing through. The outer side of the cylinder is provided with a groove serving as an internal thread, and the second plug 2 is fixed to one end of the cable.

[0047] In this embodiment, the second plug is threadably connected to the cable, which facilitates assembly and disassembly of the plug and the cable.

[0048] In this embodiment, the second plug 2 is used to connect to the first plug 1. When connected, the external thread of the first plug is screwed with the internal thread of the second plug, so that the battery pin 5 of the first plug 1 passes through the core hole of the second plug 2 and is fixedly connected with the corresponding battery pin in the second plug.

[0049] like Figure 1 , Figure 2 As shown, in this embodiment, the radius of the first plug 1 is greater than the radius of the second plug 2, ensuring that the second plug can be inserted into the first plug. When connected, the second plug 2 is inserted into the first plug 1 and fixed by external threads and internal threads. Through the above arrangement, when the second plug is inserted into the first plug, the second plug and the first plug are firmly fixed and connected, thereby splicing and fixing the segmented cables together.

[0050] Specifically, when the segmented cable is connected, the second plug 2 is inserted into the first plug 1, and the cylinder 4 on the first plug 1 is spirally twisted along the cable direction, and at the same time, the battery needle 5 in the first plug 1 is passed through the core hole at the corresponding position on the second plug, and then the cylinder 4 is slowly tightened to make the battery needle 5 in the first plug seamlessly connected with the battery needle in the second plug, that is, the first plug and the second plug are tightly connected, ensuring that the segmented cable is firmly connected and ensuring the waterproofness of the interface between the first plug 1 and the second plug 2.

[0051] Among them, the thread size of the external thread of the first plug and the internal thread of the second plug are consistent, and can be set according to the thread length of an ordinary bolt; the length of the external thread of the first plug 1 is greater than the length of the battery needle 5 in the first plug 1, which is used to protect the battery needle from being knocked crooked during transportation. The specific length setting can also be based on the premise of ensuring seamless connection between the battery needle in the first plug and the battery needle in the second plug.

[0052] The first plug 1 and the second plug 2 are tightly connected to form a cable connection plug 10 .

[0053] Through the arrangement of the first plug and the second plug, each segmented cable can be more firmly fixed and connected. Through the threaded connection, the first plug and the second plug are seamlessly and tightly connected to prevent water from entering the cable interface, thereby achieving a waterproof effect.

[0054] like Figure 4 As shown, in this embodiment, when the number of the intermediate segment cables 8 is equal to 3, the connected intermediate segment cables 8 are connected through the first plug 1 and the second plug 2 .

[0055] One end of the transmitter 6 is provided with an aviation plug, and one end of the starting segment cable 7 is connected to the aviation plug through the second plug 2 .

[0056] By connecting the transmitter to the spliced ​​segmented cables, the electrodes can be powered and activated during detection.

[0057] like Figure 4 As shown, in this embodiment, the lengths of the starting segmented cable 7, the middle segmented cable 8 and the end segmented cable 9 are all equal.

[0058] In a spliced ​​cable, there is only one starting segment cable and one ending segment cable, and at least one intermediate segment cable. The length of the starting segment cable is 30m.

[0059] like Figure 3 , Figure 4 As shown, in this embodiment, the middle segmented cable 8 is used to extend the cable length to ensure that the pluggable cable can reach the target length. It is customized according to actual needs, and each middle segmented cable is provided with 3 electrode taps.

[0060] For example, according to actual needs, the intermediate section cable is customized to be 30m, an electrode tap is set at the middle position 15m on the intermediate section cable, and an electrode tap is set at both ends of the intermediate section cable near the plug at a distance of 5m from the plug. The distance between the middle electrode tap and the taps at both ends is 10m.

[0061] The terminal segmented cable 9 is used for fixing and placing electrodes. The terminal segmented cable is 30 m long. An electrode tap is provided at the end of the terminal segmented cable for fixing and connecting electrodes.

[0062] The positions of the starting segmented cable 7 and the ending segmented cable 9 cannot be changed and are always located at the beginning and the end of the entire cable. Each intermediate segmented cable 8 can be spliced ​​at will without any sequence requirement.

[0063] In this embodiment, according to the actual needs of the tunnel, the lengths of the starting segmented cable 7 and the ending segmented cable 9 can also be set to be equal and greater than the length of the middle segmented cable, which can meet the actual needs of various tunnels.

[0064] By setting the length of the segmented cable, it is convenient to connect to the transmitter aerial plug and arrange the terminal electrode. At the same time, by adding a specific length of intermediate segmented cable, it can meet the actual detection needs.

[0065] In this embodiment, the structures of the first plug 1 and the second plug 2 are interchangeable, and a segmented cable with taps can be flexibly selected.

[0066] The starting segmented cable, the middle segmented cable and the end segmented cable are fixedly connected by the first plug and the second plug to form a completed cable. The efficient and rapid arrangement of the cables can be achieved by plugging and unplugging the segmented cables. During detection, the power supply electrodes are kept at a certain distance to avoid the tangled cables, the large and heavy wire transportation volume, complicated procedures, time-consuming and labor-intensive situations, thereby improving the detection efficiency.

[0067] In tunnel electrical detection, in order to achieve the target depth, the power supply electrodes need to maintain a certain distance, but this requires sufficiently long cables for electrical exploration in tunnels. If the cables are too long, it is inevitable that the cables will be tangled, the wires will be too large and heavy to transport, and the steps will be cumbersome, time-consuming and labor-intensive, affecting the detection efficiency. Therefore, when detecting, the cables must be arranged first through a pluggable segmented cable device.

[0068] (1) When the cable cannot be placed in the hole for a long time, specifically:

[0069] like Figure 4 As shown, in this embodiment, three intermediate segment cables are provided, a transmitter 6 is placed in the tunnel, the second plug 2 of the starting segment cable 7 is inserted into the aviation plug of the transmitter, the first plug of the starting segment cable 7 is inserted into the second plug of the first intermediate segment cable, the intermediate segment cables are spliced ​​together through the first plug or the second plug, the end segment cable 9 is connected after the last intermediate segment cable, and the electrode is installed on the electrode tap of the end segment cable 9.

[0070] Among them, the electrode tap on the middle section cable is used to connect the movable electrode. When it is necessary to detect the depth of the current position, the electrode is fixedly connected to the electrode tap at the current position. If it is necessary to detect the depth of other positions, the electrode is moved and fixedly connected to the electrode tap at other positions.

[0071] When the length cannot meet the detection requirements, it is only necessary to disconnect the end segmented cable 9, connect the middle segmented cable 8 of the required length, and then connect the end segmented cable 9.

[0072] When it is necessary to move the electrode for detection, an intermediate segmented cable 8 is added. After the intermediate segmented cable 8 is connected, the electrode is moved and fixedly connected to the electrode tap at the current detection position, and the transmitter 6 is used for transmission. After the transmitter 6 is powered on, the current is emitted, and the current is transmitted to the fixed electrode through the segmented cable to charge the surrounding rock. The electrical signal of the surrounding rock in front is then received by the receiver, and the surrounding rock information in front of the tunnel face is inverted based on the electrical signal, and the geological conditions at the excavation site are predicted. If the current and voltage data received by the receiver are too small or negative, indicating that the data is abnormal, it indicates that the newly added intermediate segmented cable 8 is damaged and can be replaced in time, which is convenient and quick.

[0073] When the detection is completed, if the cable needs to be disassembled, it is only necessary to loosen the cylinder 4 on the first plug 1 and pull the second plug 2 out of the first plug 1 and put it away.

[0074] (2) When the cable can be placed in the hole for a long time, specifically:

[0075] When performing detection operations, if data anomalies occur, use the ground resistance method to troubleshoot. Power the power supply electrodes of the current middle segment cable in turn, and form a loop with the electrodes connected to the end segment cable 9. If the resistance of the electrode is infinite, it proves that the middle segment cable where the electrode is located has a fault, and it can be replaced in time, which is convenient and quick.

[0076] After the detection is completed, disconnect the starting segmented cable 7 and the first intermediate segmented cable 8; place the transmitter 6 at the designated position and connect the starting segmented cable 7 to the transmitter 6; disconnect the ending segmented cable 9 from the last intermediate segmented cable 8; move the last intermediate segmented cable 8 to the connection point of the starting segmented cable 7 and connect it to the starting segmented cable 7 and the first intermediate segmented cable 8; the ending segmented cable 9 is connected to the last intermediate segmented cable 8 to complete the movement of the cable with the tunnel excavation.

[0077] The above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. For those skilled in the art, the utility model may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A pluggable segmented cable device for advance prediction of tunnel induced polarization, characterized in that: include: An initial segment cable, an end segment cable and at least one intermediate segment cable; Each intermediate segment cable is provided with a first plug and a second plug at both ends; One end of the starting segment cable is connected to the transmitter, and the other end is connected to the first plug or the second plug of the adjacent middle segment cable; The end of the terminal segment cable is connected to the electrode, and the other end is connected to the first plug or the second plug of the adjacent middle segment cable.

2. A pluggable segmented cable device for advance prediction of tunnel induced polarization according to claim 1, characterized in that: The first plug is a hollow cylinder, the inner side surface of the cylinder is provided with a groove as an external thread, and the first plug can move along the direction of the cable.

3. A pluggable segmented cable device for advance prediction of tunnel induced polarization according to claim 1, characterized in that: The second plug is a hollow cylinder with an opening at one end and a cover at the other end. The cover is provided with holes having the same number as the number of battery pins passing through the cable. The outer side of the cylinder is provided with a groove serving as an internal thread. The second plug is fixed to one end of the cable.

4. A pluggable segmented cable device for advance prediction of tunnel induced polarization according to claim 1, characterized in that: The radius of the first plug is greater than the radius of the second plug. When connected, the second plug is inserted into the first plug and fixed by external threads and internal threads.

5. A pluggable segmented cable device for advance prediction of tunnel induced polarization according to claim 1, characterized in that: The second plug is threadably connected to the cable.

6. A pluggable segmented cable device for advance prediction of tunnel induced polarization according to claim 1, characterized in that: When the number of the intermediate segment cables is greater than or equal to 2, the connected intermediate segment cables are connected via a first plug and a second plug.

7. A pluggable segmented cable device for advance prediction of tunnel induced polarization according to claim 1, characterized in that: One end of the transmitter is provided with an aviation plug, and one end of the starting segmented cable is connected to the aviation plug through the second plug.

8. A pluggable segmented cable device for advance prediction of tunnel induced polarization according to claim 1, characterized in that: The intermediate segmented cables are each provided with three electrode taps.

9. A pluggable segmented cable device for advance prediction of tunnel induced polarization according to claim 1, characterized in that: The tail of the terminal segmented cable is provided with an electrode tap.

10. The pluggable segmented cable device for advance prediction of tunnel induced polarization according to claim 1, characterized in that: The lengths of the starting segmented cable, the middle segmented cable and the end segmented cable are all equal, or the lengths of the starting segmented cable and the end segmented cable are equal and both are greater than the length of the middle segmented cable.

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