A seismic survey lead cable

Abstract

The utility model relates to cable technical field especially relates to a front cable for seismic exploration, including high voltage power line, high voltage power line is placed in the cable center, high voltage power line outer cable is wrapped with medium voltage power line, double core twisted signal line, four core twisted signal line, optical fiber bundle tube, high voltage power line, medium voltage power line, double core twisted signal line, four core twisted signal line and optical fiber bundle tube jointly constitute the cable core structure, the outer side of cable core structure is wrapped with non - woven fabric, and the non - woven fabric is extruded and is packed with the inner sheath, and the inner sheath is wrapped with the armour layer outside, and the armour layer is woven with the polyester fiber layer outside, and every polyester fiber layer is used for weaving the single -stranded weaving strand line of polyester fiber layer, and the single -stranded weaving strand line is left with the flow guide whisker every certain distance, the utility model has good electrical safety, mechanical strength, tensile resistance and corrosion resistance, and is not prone to failure in the long-term use, guarantees the accuracy and continuity of seismic exploration work.

Description

Technical Field

[0001] This utility model relates to the field of cable technology, and in particular to a lead cable for seismic exploration. Background Technology

[0002] In seismic exploration operations, the lead cable needs to be capable of stably transmitting electrical energy, signals, and optical signals, while also adapting to complex and harsh working environments, such as high humidity and strong corrosion. Existing lead cables have many shortcomings in structural design and performance, such as poor electrical safety, limited mechanical strength and tensile properties, and poor corrosion resistance. They are prone to failure during long-term use, affecting the accuracy and continuity of seismic exploration work and failing to meet the ever-increasing demands of seismic exploration. Utility Model Content

[0003] Based on the above problems, the purpose of this utility model is to provide a leader cable for seismic exploration. This utility model adopts the following technical solution:

[0004] This utility model provides a lead cable for seismic exploration, including a high-voltage power line;

[0005] The high-voltage power line is positioned at the center of the cable.

[0006] The high-voltage power line is wrapped with a medium-voltage power line, a two-core twisted signal line, a four-core twisted signal line, and an optical fiber bundle.

[0007] The high-voltage power line, medium-voltage power line, twin-core twisted signal line, four-core twisted signal line and optical fiber bundle tube together constitute the cable core structure.

[0008] The outer side of the cable core structure is wrapped with non-woven fabric, the non-woven fabric is extruded with an inner sheath, the inner sheath is wrapped with an armor layer, the armor layer is woven with a polyester fiber layer, and each strand of the polyester fiber layer has a guide filament at certain intervals for weaving the single braided strands used to weave the polyester fiber layer.

[0009] Preferably, the high-voltage power line is a 4-core high-voltage cable stranded structure, and each core of the high-voltage cable is composed of a tin-plated copper conductor and an HDPE insulation layer.

[0010] Preferably, the center of the twisted high-voltage power line is filled with a rubber core.

[0011] Preferably, the high-voltage power line is cabled and wrapped with four medium-voltage power lines, two twisted-pair signal lines, two twisted-pair signal lines, and four fiber optic bundles.

[0012] Preferably, the medium-voltage power line is mainly composed of tin-plated copper conductors and HDPE insulation layer.

[0013] Preferably, the twisted-core signal cable includes two signal wires twisted together, and the two signal wires are then encased in an HDPE sheath after being twisted together.

[0014] Preferably, the four-core twisted signal cable includes four signal wires twisted together, and the four signal wires are then encased in an HDPE sheath.

[0015] Preferably, the signal line is mainly composed of tin-plated copper conductors and HDPE insulation layer.

[0016] Preferably, the optical fiber bundle tube mainly consists of 4-core multimode optical fiber, optical fiber filler paste, and outer sheath steel tube; the outer sheath steel tube is externally extruded with an HDPE sheath.

[0017] Preferably, the armor layer is a multi-layered twisted steel wire structure, with adjacent layers of twisted steel wires wrapped in opposite directions, and the gaps between the twisted steel wires are filled with anti-corrosion ester.

[0018] Compared with the prior art, the beneficial technical effects of this utility model are as follows:

[0019] (1) The multi-layer stranded steel wire armor structure improves the overall mechanical strength and tensile strength of the cable, ensuring the structural stability of the cable under complex operating conditions; at the same time, the gaps in the steel wire armor are filled with anti-corrosion ester, which further improves the corrosion resistance of the cable, effectively adapts to harsh working environments, and extends the service life of the cable.

[0020] (2) The polyester fiber layer adopts a braiding process, and each braided strand has a guide whisker. The guide whisker reduces the vibration frequency of the cable in water, reduces the risk of damage caused by vibration, and extends the service life of the cable.

[0021] (3) Composite optical fiber is used to simulate signal transmission, which improves the quality and efficiency of signal transmission and meets the requirements of high-precision seismic acquisition; the fiber bundle tube is protected by 316 stainless steel tube, which effectively improves the fiber's resistance to mechanical damage and corrosion in complex environments. Attached Figure Description

[0022] The present invention will be further described below with reference to the accompanying drawings.

[0023] Figure 1 This is a cross-sectional structural diagram of the lead cable for seismic exploration according to this utility model;

[0024] Figure 2 This is a cross-sectional view of the high-voltage power line of this utility model;

[0025] Figure 3 This is a cross-sectional view of the optical fiber bundle tube of this utility model;

[0026] Figure 4This is a cross-sectional view of the four-core twisted signal cable of this utility model;

[0027] Figure 5 This is a cross-sectional view of the twisted-core signal cable of this utility model;

[0028] Figure 6 This is a schematic diagram of the armor layer stranding process of this utility model.

[0029] Explanation of reference numerals in the attached diagram: 1. Core; 2. High-voltage power line; 3. Four-core twisted signal line; 4. Medium-voltage power line; 5. Fiber optic bundle tube; 501. Multimode fiber; 502. Fiber optic filler; 503. Outer sheath steel tube; 6. Twisted pair signal line; 7. Non-woven fabric; 8. Inner sheath; 9. Armor layer; 10. Polyester fiber layer; 11. Guide whisker; Detailed Implementation

[0030] To make the technical problems, technical solutions and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0031] like Figures 1 to 5 As shown, this embodiment discloses a lead cable for seismic exploration, including a high-voltage power line 2 positioned at the center of a cable. The high-voltage power line 2 is a multi-core high-voltage cable stranded structure, with a rubber core 1 filling the center of the strand. Each high-voltage cable core consists of a tin-plated copper conductor and an HDPE insulation layer. In this embodiment, the high-voltage power line 2 is composed of four high-voltage cables stranded together.

[0032] The high-voltage power line 2 is wrapped with a medium-voltage power line 4, a two-core twisted signal line 6, a four-core twisted signal line 3, and an optical fiber bundle tube 5. The high-voltage power line 2, medium-voltage power line 4, two-core twisted signal line 6, four-core twisted signal line 3, and optical fiber bundle tube 5 together constitute the cable core structure, realizing the integrated design of power transmission, signal transmission, and optical signal transmission.

[0033] The outer side of the cable core structure is wrapped with non-woven fabric 7, and an inner sheath 8 is extruded over the non-woven fabric 7. The inner sheath 8 is made of TPEE material. An armor layer 9 is wrapped around the inner sheath 8, and a braided polyester fiber layer 10 is wrapped around the armor layer 9. Each strand of the polyester fiber layer 10 has a guide strand 11 at regular intervals in the braided strands used to braid the polyester fiber layer 10. This reduces the vibration frequency of the cable in water, lowers the risk of damage caused by vibration, and extends the service life of the cable. In this embodiment, the guide strands 11 are left every 50 to 100 mm in length, and the length of the guide strands 11 is set to 100 to 200 mm.

[0034] The functions of the damping element are: 1) to reduce the vibration frequency of the cable in water, reduce external vibration interference, and ensure signal acquisition accuracy; and 2) to reduce the risk of damage caused by vibration. By absorbing the external vibration energy received by the leader cable, the damping element reduces the transmission efficiency of vibration to the cable, thereby preventing interference with seismic wave signals and ensuring the authenticity and reliability of the data. By buffering the impact of vibration, it reduces the dynamic deformation and stress concentration of the leader cable, essentially forming an "isolation zone" between the cable and external vibration sources, reducing the risk of mechanical damage.

[0035] The medium-voltage power cord 4 is mainly composed of tin-plated copper conductors and HDPE insulation layer.

[0036] The twin-core twisted signal cable 6 consists of two signal wires twisted together, and the two signal wires are then encased in an HDPE sheath. The four-core twisted signal cable 3 consists of four signal wires twisted together, and the four signal wires are then encased in an HDPE sheath. The signal wires are primarily composed of tinned copper conductors and an HDPE insulation layer.

[0037] The fiber optic bundle 5 mainly consists of a 4-core multimode fiber 501, fiber optic filler 502, and an outer sheath steel tube 503; the outer sheath steel tube 503 is extruded with an HDPE sheath. The outer sheath steel tube 503 can be a 316 stainless steel tube. The outer sheath steel tube 503 effectively protects the optical fiber from mechanical damage and environmental corrosion.

[0038] It should be noted that the HDPE insulation layer is an insulation layer made of HDPE material, which is high-density polyethylene.

[0039] The armor layer 9 is a multi-layer stranded steel wire structure. The two adjacent stranded steel wires are wrapped in opposite directions, and the gaps between the stranded steel wires are filled with anti-corrosion ester to further improve the corrosion resistance of the cable.

[0040] like Figure 6 As shown, in this embodiment, the armor layer 9 is a three-layer stranded steel wire. All three layers are made of high-strength, corrosion-resistant zinc-aluminum alloy, exhibiting excellent corrosion resistance. The wrapping pitch of the three-layer stranded steel wire is 6.5 to 8.5 times the outer diameter of the steel wire armor. The three-layer steel wire armor uses a reverse wrapping method for adjacent layers. That is, the first layer of steel wire is wrapped clockwise on the first section of the auger distributor I of the armoring machine, the second layer is wrapped counterclockwise on the second section of the auger distributor II, and the third layer is wrapped clockwise on the third section of the auger distributor III. The L1 and L2 spacings of each section of the auger distributor are adjusted to regulate pre-deformation and further eliminate stress. After the third layer of steel wire armor is completed, a specialized steel wire straightening machine V is used to straighten the steel wire. The straightening machine typically consists of multiple rollers. When the steel wire passes through the gaps between the rollers, it is subjected to the squeezing and bending action of the rollers, thereby eliminating the bending and twisting of the steel wire.

[0041] In this embodiment, the high-voltage power line 2 is wrapped with four medium-voltage power lines 4, two twisted twin signal lines 6, two twisted four signal lines 3, and four fiber optic bundles 5.

[0042] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. A leader cable for seismic exploration, characterized in that, Including high-voltage power lines (2); The high-voltage power line (2) is positioned at the center of the cable; The high-voltage power line (2) is wrapped with a medium-voltage power line (4), a two-core twisted signal line (6), a four-core twisted signal line (3), and an optical fiber bundle (5). The high-voltage power line (2), medium-voltage power line (4), double-core twisted signal line (6), four-core twisted signal line (3) and fiber optic bundle tube (5) together constitute the cable core structure. The outer side of the cable core structure is wrapped with non-woven fabric (7), the non-woven fabric (7) is extruded with an inner sheath (8), the inner sheath (8) is wrapped with an armor layer (9), the armor layer (9) is woven with a polyester fiber layer (10), each strand of the polyester fiber layer (10) has a guide filament (11) left at a certain distance for the single braided strand used to weave the polyester fiber layer (10).

2. The seismic exploration leader cable according to claim 1, characterized in that: The high-voltage power line (2) is a 4-core high-voltage cable stranded structure, and each core of the high-voltage cable is composed of a tin-plated copper conductor and an HDPE insulation layer.

3. The seismic exploration leader cable according to claim 2, characterized in that: The high-voltage power line (2) is filled with a rubber core (1) at the twisted center.

4. The seismic exploration leader cable according to claim 1, characterized in that: The high-voltage power line (2) is wrapped with four medium-voltage power lines (4), two twisted twin signal lines (6), two twisted four signal lines (3) and four fiber optic bundles (5).

5. The seismic exploration leader cable according to claim 1, characterized in that: The medium-voltage power line (4) is mainly composed of tin-plated copper conductors and HDPE insulation layer.

6. The leader cable for seismic exploration according to claim 1, characterized in that: The twisted-core signal cable (6) includes two signal wires twisted together, and the two signal wires are twisted together and then encased in an HDPE sheath.

7. The seismic exploration leader cable according to claim 1, characterized in that: The four-core twisted signal line (3) includes four signal lines twisted together, and the four signal lines are twisted together and then encased in an HDPE sheath.

8. The seismic exploration leader cable according to claim 6 or 7, characterized in that: The signal line is mainly composed of tin-plated copper conductors and HDPE insulation layer.

9. The seismic exploration leader cable according to claim 1, characterized in that: The fiber bundle tube (5) is mainly composed of a 4-core multimode fiber (501), fiber filler paste (502), and an outer steel tube (503); the outer steel tube (503) is externally extruded with an HDPE sheath.

10. The seismic exploration leader cable according to claim 1, characterized in that: The armor layer (9) is a multi-layered twisted steel wire structure, with adjacent layers of twisted steel wires wrapped in opposite directions, and the gaps between the twisted steel wires are filled with anti-corrosion ester.

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