Optical fiber signal transmission seismic cable for seismic exploration

Abstract

The invention relates to the technical field of seismic exploration equipment, in particular to an optical fiber signal transmission seismic cable for seismic exploration. A power line, a twisted-pair shielding signal line and an optical fiber beam tube are wrapped outside the high-pressure plastic composite hose in a cabling mode, and the power line, the twisted-pair shielding signal line and the optical fiber beam tube jointly form a cable core structure. An outer layer non-woven fabric is wrapped outside the cable core structure, a polyurethane inner sheath is extruded outside the outer layer non-woven fabric, an armor layer is wrapped outside the polyurethane inner sheath, and a polymer polyethylene sheath is extruded outside the armor layer. According to the high-pressure plastic composite hose, through the design of the double reinforcing layers of the Kevlar aramid fibers and the polyester fibers, the strength and bursting pressure of the central air pipe are remarkably improved, and the high-pressure plastic composite hose can better adapt to the complex working environment; the cable core structure adopts composite optical fiber analog signal transmission to replace a traditional digital signal seismic cable, so that the quality and efficiency of signal transmission are improved; and the armor layer adopts a double-layer steel wire armor structure, so that the overall mechanical strength and tensile property of the cable are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of seismic exploration equipment, and in particular to an optical fiber signal transmission gun cable for seismic exploration. Background Art

[0002] In seismic exploration operations, shot cables serve as a critical component connecting the seismic source and the data acquisition system. Their performance directly impacts the accuracy and reliability of exploration data. Traditional shot cables suffer from numerous issues, such as the fragility of the central air tube and a short service life, which frequently lead to failures in complex exploration environments and hinder exploration progress. Furthermore, traditional digital signal shot cables have limitations in signal transmission, making them unable to meet the growing demand for high-precision seismic acquisition. Furthermore, existing shot cables lack adequate protective structures, making them inadequate for harsh operating environments. This can damage internal power cables, signal cables, and optical fibers, further compromising signal transmission quality. Summary of the Invention

[0003] In view of the above problems, the purpose of the present invention is to provide a fiber optic signal transmission cable for seismic exploration, and the present invention adopts the following technical solutions:

[0004] The present invention provides a fiber optic signal transmission gun cable for seismic exploration, comprising a high-pressure plastic composite soft tube, wherein the high-pressure plastic composite soft tube is located at the center of the gun cable;

[0005] The high-pressure plastic composite hose is wrapped with a power line, a twisted-pair shielded signal line and an optical fiber bundle tube; the high-pressure plastic composite hose, the power line, the twisted-pair shielded signal line and the optical fiber bundle tube together constitute a cable core structure;

[0006] The cable core structure is wrapped with an outer layer of non-woven fabric, the outer layer of non-woven fabric is extruded with a polyurethane inner sheath, the outer layer of polyurethane inner sheath is wrapped with an armor layer, and the outer layer of armor layer is extruded with a high molecular polyethylene sheath.

[0007] Preferably, the high-pressure plastic composite hose is mainly composed of a nylon tube, a Kevlar aramid braided reinforcement layer, a polyurethane sheath, and a polyester fiber braided reinforcement layer.

[0008] Preferably, the high-pressure plastic composite hose is wrapped with an inner layer of non-woven fabric.

[0009] Preferably, the high-pressure plastic composite hose is cabled with 26 power lines, 12 twisted-pair shielded signal lines and 2 optical fiber bundle tubes.

[0010] Preferably, the power cord is mainly composed of a tinned copper conductor and a HDPE insulation layer.

[0011] Preferably, the twisted-pair shielded signal line comprises two signal line bodies twisted together, the two signal line bodies are twisted and wrapped with an aluminum-plastic composite film shielding layer, and a tinned drainage grounding wire is attached to the aluminum-plastic composite film shielding layer.

[0012] Preferably, the signal line body is mainly composed of a tinned copper conductor and a HDPE insulation layer.

[0013] Preferably, the optical fiber bundle tube is mainly composed of 4-core multimode optical fibers, optical fiber filling paste, and an outer protective steel tube; the outer protective steel tube is extruded with an HDPE sheath.

[0014] Preferably, the armor layer is a multi-layer twisted steel wire structure, and the steel wires of the armor layer are high-carbon steel wires, which are extruded with HDPE sheath.

[0015] Preferably, the armor layer is two layers of twisted steel wires; the inner layer of the armor layer has 62 steel wires and the outer layer has 68 steel wires, the inner and outer layers are twisted in opposite directions, the inner layer is twisted to the right, and the outer layer is twisted to the left, and the pitch of the two layers of steel wire armor is 6.5 to 8.5 times the outer diameter of the steel wire armor.

[0016] Compared with the prior art, the present invention has the following beneficial technical effects:

[0017] (1) The use of high-pressure plastic composite hose as the central structure improves the overall pressure resistance and service life. In particular, the double-layer reinforcement design of Kevlar aramid and polyester fiber significantly improves the strength and bursting pressure of the central air pipe, which can better adapt to complex working environments;

[0018] (2) The use of composite optical fiber analog signal transmission instead of traditional digital signal cable improves the quality and efficiency of signal transmission and meets the needs of high-precision seismic acquisition; the optical fiber bundle tube adopts 316 stainless steel tube protection design, which effectively improves the optical fiber's resistance to mechanical damage and corrosion in complex environments;

[0019] (3) The armor layer adopts a multi-layer steel wire armor structure and a steel wire + HDPE sheath structure, which better protects the steel wire and improves the overall mechanical strength and tensile performance of the cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be further described below with reference to the accompanying drawings.

[0021] Figure 1 This is a cross-sectional structural diagram of the optical fiber signal transmission cable for seismic exploration according to the present invention;

[0022] Figure 2 1 is a cross-sectional structural diagram of the high-pressure plastic composite hose of the present invention;

[0023] Figure 3FIG. 4 is a cross-sectional structural diagram of the optical fiber bundle tube of the present invention;

[0024] Figure 4 This is a cross-sectional structural diagram of a twisted-pair shielded signal line of the present invention;

[0025] Figure 5 Schematic diagram of the twisting of the armor layer of the present invention.

[0026] Explanation of the accompanying symbols: 1. High-pressure plastic composite hose; 101. Nylon tube; 102. Kevlar aramid braided reinforcement layer; 103. Polyurethane sheath; 104. Polyester fiber braided reinforcement layer; 2. Inner non-woven fabric; 3. Power cord; 4. Twisted-pair shielded signal cable; 401. Signal line body; 402. Aluminum-plastic composite film shielding layer; 403. Tinned drainage grounding wire; 5. Optical fiber bundle tube; 501. Multimode optical fiber; 502. Optical fiber filling paste; 503. Outer steel pipe; 6. Outer non-woven fabric; 7. Polyurethane inner sheath; 8. Armor layer; 9. Polyethylene sheath. DETAILED DESCRIPTION

[0027] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments.

[0028] like Figures 1 to 4 As shown, this embodiment discloses an optical fiber signal transmission gun cable for seismic exploration, which comprises, from the inside to the outside, a high-pressure plastic composite soft 1, a cable core structure, an outer non-woven fabric 6, a polyurethane inner sheath 7, an armor layer 8 and a high-molecular polyethylene sheath 9.

[0029] The high-pressure plastic composite hose 1 is located at the center of the gun cable. The high-pressure plastic composite hose 1 is wrapped with a power line 3, a twisted shielded signal line 4, and an optical fiber bundle tube 5. The power line 3, the twisted shielded signal line 4, and the optical fiber bundle tube 5 together constitute the cable core structure, realizing an integrated design for power transmission, signal transmission, and optical signal transmission. The cable core structure is wrapped with an outer layer of non-woven fabric 6, which is extruded with a polyurethane inner sheath 7. The polyurethane inner sheath 7 is wrapped with an armor layer 8, which is extruded with a high-molecular polyethylene sheath 9. The high-molecular polyethylene sheath 9 has good thermal deformation resistance, wear resistance, and chemical resistance.

[0030] In this embodiment, the high-pressure plastic composite hose 1 primarily consists of a nylon tube 101, a Kevlar aramid braided reinforcement layer 102, a polyurethane sheath 103, and a polyester fiber braided reinforcement layer 104. These layers are arranged in this order from the inside out. The dual-layer design of Kevlar and polyester fiber braids significantly improves the hose's tensile strength and pressure resistance.

[0031] In this embodiment, the high-pressure plastic composite hose 1 is wrapped with an inner layer of non-woven fabric 2 , and the cable core structure is wrapped on the inner layer of non-woven fabric 2 .

[0032] In this embodiment, 26 power lines 3 , 12 twisted-pair shielded signal lines 4 and 2 optical fiber bundle tubes 5 are wrapped around the outside of the high-pressure plastic composite hose 1 .

[0033] The power line 3 is mainly composed of a tinned copper conductor and a HDPE insulation layer.

[0034] The twisted-pair shielded signal cable 4 comprises two twisted signal wires 401, primarily composed of a tinned copper conductor and an HDPE insulation layer. These two signal wires 401 are then wrapped around an aluminum-plastic composite film shielding layer 402, which contains a tinned grounding wire 403. This grounding wire 403 ensures the continuity of the shielding layer 402 and also serves as a grounding wire (for reliable grounding).

[0035] The fiber bundle 5 is primarily composed of four multimode optical fibers 501, fiber filler 502, and an outer steel tube 503. The outer steel tube 503 is extruded with an HDPE sheath. The outer steel tube 503 can be 316 stainless steel. This effectively protects the optical fibers from mechanical damage and environmental corrosion.

[0036] It should be noted that the HDPE sheath is a protective sheath made of HDPE material, and HDPE is a high-density polyethylene material.

[0037] The armor layer 8 is a multi-layer twisted steel wire structure. The steel wires of the armor layer 8 are high-carbon steel wires, and the high-carbon steel wires are extruded with a HDPE sheath.

[0038] In this embodiment, the armor layer 8 is composed of two layers of twisted steel wires. The inner layer of the armor layer 8 has 62 steel wires and the outer layer has 68 steel wires. The inner and outer layers are twisted in opposite directions (in this embodiment, the inner layer is twisted to the right and the outer layer is twisted to the left). The pitch of the two layers of steel wire armor is 6.5 to 8.5 times the outer diameter of the steel wire armor. This double-layer, non-directional twisting design significantly improves the overall mechanical strength and tensile strength of the cable. Figure 5 As shown, the diameter of a single steel wire is φ1.3-φ1.8mm (typical specifications are 1.4 in actual production), and the stranding pitch h / stranded outer diameter D = 6.5-8.5 times. The stranding pitch is the axial length of a single wire during one rotation.

[0039] Beneficial technical effects of the present invention:

[0040] The design of a high-pressure plastic composite hose, combined with a double-layer reinforcement layer of Kevlar aramid and polyester fiber, significantly improves the cable's compressive strength and service life. Composite optical fiber analog signal transmission replaces traditional digital signal cables, achieving a technological breakthrough. The steel tube sheathed optical fiber design effectively protects the optical fiber and adapts to complex environmental conditions. The double-layer steel wire armor structure provides excellent mechanical strength and tensile properties. The special twisting parameter design further improves the cable's overall performance. The use of HDPE sheath enhances the cable's durability and stability. The main innovations are as follows:

[0041] (1) The use of high-pressure plastic composite hose as the central structure improves the overall pressure resistance and service life. In particular, the double-layer reinforcement design of Kevlar aramid and polyester fiber significantly improves the strength and bursting pressure of the central air pipe, which can better adapt to complex working environments;

[0042] (2) The use of composite optical fiber analog signal transmission instead of traditional digital signal cable improves the quality and efficiency of signal transmission, meets the needs of high-precision seismic acquisition, and achieves revolutionary technological progress; the optical fiber bundle tube adopts 316 stainless steel tube protection design, which effectively improves the optical fiber's resistance to mechanical damage and corrosion in complex environments;

[0043] (3) The double-layer steel wire armor adopts a steel wire + HDPE sheath structure, which better protects the steel wire and improves the overall mechanical strength and tensile performance of the cable; the small HDPE sheath wrapped around the outside of the steel wire is bonded together, which enhances the strength of the sheath and the stability of the steel wire armor, effectively protecting the internal cables.

[0044] The embodiments described above are merely descriptions of preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Without departing from the spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by persons skilled in the art should fall within the scope of protection defined by the claims of the present invention.

Claims

1. A fiber optic signal transmission cable for seismic exploration, characterized by: It comprises a high-pressure plastic composite hose (1), wherein the high-pressure plastic composite hose (1) is located at the center of the gun cable; The high-pressure plastic composite hose (1) is wrapped with a power line (3), a twisted-pair shielded signal line (4) and an optical fiber bundle tube (5). The high-pressure plastic composite hose (1), the power line (3), the twisted-pair shielded signal line (4) and the optical fiber bundle tube (5) together constitute a cable core structure; The cable core structure is wrapped with an outer layer of non-woven fabric (6), the outer layer of non-woven fabric (6) is extruded with a polyurethane inner sheath (7), the outer layer of polyurethane inner sheath (7) is wrapped with an armor layer (8), and the outer layer of armor layer (8) is extruded with a high molecular polyethylene sheath (9).

2. The optical fiber signal transmission gun cable for seismic exploration according to claim 1, characterized in that: The high-pressure plastic composite hose (1) mainly consists of a nylon tube (101), a Kevlar aramid braided reinforcement layer (102), a polyurethane sheath (103), and a polyester fiber braided reinforcement layer (104).

3. The optical fiber signal transmission gun cable for seismic exploration according to claim 1, characterized in that: The high-pressure plastic composite hose (1) is wrapped with an inner layer of non-woven fabric (2).

4. The optical fiber signal transmission gun cable for seismic exploration according to claim 1, characterized in that: The high-pressure plastic composite hose (1) is cabled with 26 power lines (3), 12 twisted-pair shielded signal lines (4) and 2 optical fiber bundle tubes (5).

5. The optical fiber signal transmission gun cable for seismic exploration according to claim 1, characterized in that: The power cord (3) is mainly composed of a tinned copper conductor and a HDPE insulation layer.

6. The optical fiber signal transmission gun cable for seismic exploration according to claim 1, characterized in that: The twisted-pair shielded signal line (4) comprises two signal line bodies (401) twisted together, the two signal line bodies (401) being wrapped with an aluminum-plastic composite film shielding layer (402) after being twisted, and a tinned drainage grounding wire (403) being attached to the aluminum-plastic composite film shielding layer (402).

7. The optical fiber signal transmission gun cable for seismic exploration according to claim 6, characterized in that: The signal line body (401) is mainly composed of a tinned copper conductor and a HDPE insulation layer.

8. The optical fiber signal transmission gun cable for seismic exploration according to claim 1, characterized in that: The optical fiber bundle tube (5) is mainly composed of 4-core multimode optical fibers (501), optical fiber filling paste (502), and an outer protective steel tube (503); the outer protective steel tube (503) is extruded with an HDPE sheath.

9. The optical fiber signal transmission gun cable for seismic exploration according to claim 1, characterized in that: The armor layer (8) is a multi-layer twisted steel wire structure, and the steel wire of the armor layer (8) is high-carbon steel wire, and the high-carbon steel wire is extruded with a HDPE sheath.

10. The optical fiber signal transmission gun cable for seismic exploration according to claim 9, characterized in that: The armor layer (8) is two layers of twisted steel wires; The armor layer (8) has 62 inner steel wires and 68 outer steel wires, the inner and outer steel wires are twisted in opposite directions, and the pitch of the two layers of steel wire armor is 6.5 to 8.5 times the outer diameter of the steel wire armor.

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