Armoured temperature sensing optical cable

Abstract

The utility model discloses an armored temperature measurement optical cable, it includes inner core layer, armored layer, reinforcing layer and sheath layer, the inner core layer includes the bundle pipe and a plurality of temperature sensing optical fiber, a plurality of temperature sensing optical fiber winding setting in the bundle pipe outer circumferential side, the armored layer includes steel wire inner layer and steel wire outer layer, the steel wire outer layer winding setting in the outer circumferential side of steel wire inner layer, the spiral direction of steel wire outer layer and steel wire inner layer is opposite. This kind of armored temperature measurement optical cable, through winding setting a plurality of temperature sensing optical fiber in the bundle pipe outer circumferential side, can make temperature sensing optical fiber and bundle pipe form the bundle structure of mutual restraint, avoid temperature sensing optical fiber axial shift, through setting steel wire outer layer winding setting in steel wire inner layer outside, through increasing the spiral armored of one more layer, improve the torsional stiffness of armored layer, simultaneously, the spiral direction of steel wire outer layer and steel wire inner layer is opposite, prevents the torsional stiffness of armored layer single direction bottom, receives accidental fracture.

Description

Technical Field

[0001] This utility model relates to the field of temperature-measuring optical cable technology, specifically an armored temperature-measuring optical cable. Background Technology

[0002] Distributed temperature measurement fiber optic systems have broad application prospects in pipeline leakage detection due to their fast response and high positioning accuracy. DTS detection technology is currently widely used for the detection of oil and gas pipelines, submarine cables, and newly built municipal utility tunnels, and is often laid out close to the outside of the pipeline in a pre-embedded manner during use.

[0003] The prior art patent document CN219590570U discloses a heated armored temperature-measuring optical cable, comprising a temperature-measuring optical fiber, a protective kit, and a heating assembly. The heating assembly includes two layers: an inner heating mesh and an outer heating mesh. The inner and outer heating meshes are connected at one end to form a loop, and the other ends are connected to a heating power source. The protective kit includes an inner protective sleeve, a middle protective sleeve, and an outer protective sleeve. The temperature-measuring optical fiber is disposed within the inner protective sleeve. The inner heating mesh is disposed between the inner and middle protective sleeves, and the outer heating mesh is disposed between the middle and outer protective sleeves. This invention uses double-layer heating meshes as the neutral and live wires of the heating cable, reducing the size of a single heating wire and improving the overall flexibility of the cable. A double-layer outer sheath structure composed of a high-temperature resistant insulation layer and a wear-resistant outer sheath improves the cable's wear resistance. The optical fiber core uses multiple parallel optical fibers, which effectively reduces detection errors and improves detection accuracy.

[0004] Although the device has many beneficial effects, it still has the following problems: The elastic partition groove of the device is a straight channel, and the multimode temperature sensing fiber is only constrained radially and not fixed axially. It is prone to displacement due to the stretching of the optical cable, which leads to increased friction between the optical fiber and the groove wall and periodic fluctuations in the temperature sensing signal. Secondly, the spiral armor tube of this device is wound in a single direction, which has extremely poor anti-torsion performance. If an accidental twist occurs during the laying process, it can easily cause the internal optical fiber to break under shear force. Utility Model Content

[0005] The purpose of this section is to outline some aspects of the embodiments of this utility model and to briefly introduce some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be used to limit the scope of this utility model.

[0006] 1. Technical problems to be solved: To address the issue that the elastic partition groove of the device is a straight channel, the multimode temperature-sensing fiber is only constrained radially and not fixed axially, and is prone to displacement due to cable stretching, which leads to increased friction between the fiber and the groove wall and periodic fluctuations in the temperature sensing signal. Secondly, the spiral armor tube of this device is wound in a single direction, which has extremely poor anti-torsion performance. If an accidental twist occurs during the laying process, it is easy to cause the internal optical fiber to break under shear force. Therefore, this utility model was proposed.

[0007] Therefore, the purpose of this utility model is to provide an armored temperature measuring optical cable, in which the optical fiber is fixed and the spiral armor tube of the device has strong anti-torsion performance.

[0008] 2. Technical Solution: To solve the above-mentioned technical problems, according to one aspect of the present invention, the present invention provides the following technical solution: An armored temperature-sensing optical cable includes an inner core layer, an armor layer, a reinforcing layer, and a sheath layer. The armor layer is disposed on the outer periphery of the inner core layer, the reinforcing layer is disposed on the outer periphery of the armor layer, and the sheath layer is disposed on the outer periphery of the reinforcing layer. The inner core layer includes a bundle tube and multiple temperature-sensing optical fibers, which are wound around the outer periphery of the bundle tube. The armor layer includes an inner steel wire layer and an outer steel wire layer, which are wound around the outer periphery of the inner steel wire layer. The outer and inner steel wire layers have opposite spiral directions. The bundle tube provides certain strength support for the temperature-sensing optical fibers, and the outer and inner steel wire layers are dispersed to allow for heat dissipation.

[0009] As a preferred embodiment of the armored temperature measuring optical cable of this utility model, the inner core layer includes: a bundle tube, and a positioning groove is provided on the outer periphery of the bundle tube, and the positioning groove is spirally arranged on the outer periphery of the bundle tube. Multiple temperature-sensing optical fibers are disposed within the positioning groove; A filling layer is disposed on the outer periphery of the plurality of temperature-sensing optical fibers and the bundle tube.

[0010] In a preferred embodiment of the armored temperature measuring optical cable of this utility model, the inner steel wire layer is disposed on the outer periphery of the filling layer, and the braiding angle of the inner steel wire layer and the outer steel wire layer is 60°.

[0011] As a preferred embodiment of the armored temperature measuring optical cable of this utility model, the reinforcing layer includes: a fiber layer, which is disposed on the outer periphery of the inner layer of the steel wire and the outer layer of the steel wire, and the outer periphery of the fiber layer is spirally provided with an installation groove; A flexible layer is disposed within the mounting groove.

[0012] As a preferred embodiment of the armored temperature measuring optical cable of this utility model, the sheath layer includes a corrosion-resistant layer, which is disposed on the outer periphery of the fiber layer; An insulating layer is disposed on the outer periphery of the corrosion-resistant layer; A wear-resistant layer is disposed on the outer periphery of the insulating layer.

[0013] In a preferred embodiment of the armored temperature-measuring optical cable of this utility model, the bundle tube is made of a temperature-resistant material.

[0014] In a preferred embodiment of the armored temperature-measuring optical cable of this utility model, the diameter and helical density of the inner layer of the steel wire are different from those of the outer layer of the steel wire.

[0015] 3. Beneficial effects: Compared with the prior art, the beneficial effects of this utility model are: This type of armored temperature-measuring optical cable, by winding multiple temperature-sensing optical fibers around the outer periphery of the bundle tube, can form a bundle structure that mutually restrains the temperature-sensing optical fibers and the bundle tube, thus preventing the temperature-sensing optical fibers from shifting axially. This type of armored temperature measuring optical cable features an outer layer of steel wire wound around the outer side of the inner layer of steel wire. By adding an extra layer of spiral armor, the torsional resistance of the armor layer is improved. At the same time, the spiral directions of the outer and inner layers of steel wire are opposite, preventing the armor layer from having low torsional resistance in one direction and thus avoiding accidental breakage. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the present utility model will be described in detail below with reference to the accompanying drawings and detailed embodiments. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them: Figure 1 This is a schematic diagram of the overall structure of an armored temperature measuring optical cable according to the present invention; Figure 2 This is a schematic diagram of the sheath layer structure of an armored temperature measuring optical cable according to the present invention; Figure 3 This is a schematic diagram of the inner core structure of an armored temperature measuring optical cable according to this utility model; Figure 4 This is a schematic diagram of the armor layer structure of an armored temperature measuring optical cable according to the present invention; Figure 5 This is a schematic diagram of the reinforcing layer structure of an armored temperature measuring optical cable according to this utility model.

[0017] The labels in the diagram are as follows: 1. Inner core layer; 11. Bundle tube; 12. Positioning groove; 13. Temperature-sensing optical fiber; 14. Filling layer; 2. Armor layer; 21. Inner steel wire layer; 22. Outer steel wire layer; 3. Reinforcing layer; 31. Fiber layer; 32. Mounting groove; 33. Flexible layer; 4. Sheath layer; 41. Corrosion-resistant layer; 42. Insulation layer; 43. Wear-resistant layer. Detailed Implementation

[0018] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0019] This utility model is described in detail with reference to the schematic diagrams. When describing the embodiments of this utility model, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not adhering to the usual scale. Furthermore, the schematic diagrams are merely examples and should not be construed as limiting the scope of protection of this utility model. In actual manufacturing, the three-dimensional spatial dimensions of length, width, and depth should be included.

[0020] The orientation or positional relationship indicated in the terminology is based on the orientation or positional relationship shown in the accompanying drawings and is only for the convenience of describing the present invention and simplifying the description. It is not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0021] The term "connection method" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0022] The embodiments of this utility model will now be described in further detail with reference to the accompanying drawings.

[0023] Please see Figures 1-5 An armored temperature-measuring optical cable according to this embodiment includes an inner core layer 1, an armor layer 2, a reinforcing layer 3, and a sheath layer 4. The armor layer 2 is disposed on the outer periphery of the inner core layer 1, the reinforcing layer 3 is disposed on the outer periphery of the armor layer 2, and the sheath layer 4 is disposed on the outer periphery of the reinforcing layer 3. The inner core layer 1 includes a bundle tube 11 and a plurality of temperature-sensing optical fibers 13. The plurality of temperature-sensing optical fibers 13 are wound and tenon-jointed on the outer periphery of the bundle tube 11. The armor layer 2 includes an inner steel wire layer 21 and an outer steel wire layer 22. The outer steel wire layer 22 is wound and tenon-jointed on the outer periphery of the inner steel wire layer 21. The spiral directions of the outer steel wire layer 22 and the inner steel wire layer 21 are opposite.

[0024] It is worth noting that, in order to fix the temperature-sensing optical fiber 13, the inner core layer 1 specifically includes: a bundle tube 11, and a positioning groove 12 is provided on the outer periphery of the bundle tube 11. The positioning groove 12 is spirally formed on the outer periphery of the bundle tube 11. Multiple temperature-sensing optical fibers 13 are connected in the positioning groove 12 by tenons and tenons. The filling layer 14 is bonded to the outer periphery of the plurality of temperature-sensing optical fibers 13 and the bundle tube 11. In this embodiment, the material of the filling layer 14 is set as thermally conductive silicone gel.

[0025] Next, in order to improve the strength of the armor, specifically, the inner steel wire layer 21 is tenoned and tenoned to the outer periphery of the filling layer 14, and the braiding angle of the inner steel wire layer 21 and the outer steel wire layer 22 is 60° to better utilize the anti-torsion performance provided by the different spiral directions of the inner steel wire layer 21 and the outer steel wire layer 22.

[0026] Meanwhile, in order to strengthen the armor layer 2, specifically, the reinforcing layer 3 includes: a fiber layer 31, which is bonded to the outer periphery of the inner steel wire layer 21 and the outer steel wire layer 22, and the outer periphery of the fiber layer 31 is spirally provided with an installation groove 32. The flexible layer 33 is bonded to the mounting groove 32. In this embodiment, the material of the fiber layer 31 is set as aramid fiber yarn, and the material of the flexible layer 33 is set as glass fiber cloth composite tape.

[0027] Furthermore, in order to protect the cable, specifically, the sheath layer 4 includes: a corrosion-resistant layer 41, which is bonded to the outer periphery of the fiber layer 31; Insulating layer 42 is bonded to the outer periphery of corrosion-resistant layer 41; The wear-resistant layer 43 is bonded to the outer periphery of the insulating layer 42. In this embodiment, the material of the corrosion-resistant layer 41 is corrosion-resistant nitrile rubber, the material of the insulating layer 42 is cross-linked polyethylene, and the material of the wear-resistant layer 43 is polytetrafluoroethylene.

[0028] It is worth noting that, in order not to affect the performance of the temperature-sensing optical fiber 13, the bundle tube 11 is made of a temperature-resistant material. In this embodiment, the material of the bundle tube 11 is set as a temperature-resistant silicone tube.

[0029] Finally, in order to improve the torsional resistance of the armor layer 2, specifically, the diameter and spiral density of the inner steel wire layer 21 are different from those of the outer steel wire layer 22. This is to make the contact between the inner steel wire layer 21 and the outer steel wire layer 22 more concentrated, thereby improving the compressive resistance of the armor layer 2.

[0030] Combination Figures 1-5 The armored temperature-measuring optical cable of this embodiment is used in the following specific process: 1: According to the actual use, after the temperature sensing fiber 13 is wound and connected to the positioning groove 12 on the outside of the bundle tube 11, the filling layer 14 is bonded, and the inner steel wire layer 21 and the outer steel wire layer 22 are wound in sequence on the outside of the filling layer 14. Then, the fiber layer 31 is bonded on the outside of the inner steel wire layer 21 and the outer steel wire layer 22. 2: A flexible layer 33 is wound and connected in the mounting groove 32 of the fiber layer 31 to improve the strength of the fiber layer 31. Then, a corrosion-resistant layer 41, an insulation layer 42 and a wear-resistant layer 43 are sequentially bonded to the outside of the fiber layer 31 to improve the cable's resistance to external interference.

[0031] Although the present invention has been described above with reference to embodiments, various modifications can be made and components can be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the features in the embodiments disclosed in this invention can be combined with each other in any way. The lack of an exhaustive description of these combinations in this specification is merely for the sake of brevity and resource conservation. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. An armored temperature-measuring optical cable, characterized in that, The system includes an inner core layer (1), an armor layer (2), a reinforcing layer (3), and a sheath layer (4). The armor layer (2) is disposed on the outer periphery of the inner core layer (1), the reinforcing layer (3) is disposed on the outer periphery of the armor layer (2), and the sheath layer (4) is disposed on the outer periphery of the reinforcing layer (3). The inner core layer (1) includes a bundle tube (11) and a plurality of temperature-sensing optical fibers (13). The plurality of temperature-sensing optical fibers (13) are wound around the outer periphery of the bundle tube (11). The armor layer (2) includes an inner steel wire layer (21) and an outer steel wire layer (22). The outer steel wire layer (22) is wound around the outer periphery of the inner steel wire layer (21). The spiral directions of the outer steel wire layer (22) and the inner steel wire layer (21) are opposite.

2. The armored temperature-measuring optical cable according to claim 1, characterized in that, The inner core layer (1) includes: a bundle tube (11), and a positioning groove (12) is provided on the outer periphery of the bundle tube (11), and the positioning groove (12) is spirally arranged on the outer periphery of the bundle tube (11); Multiple temperature-sensing optical fibers (13) are disposed within the positioning groove (12); A filling layer (14) is disposed on the outer periphery of the plurality of temperature-sensing optical fibers (13) and the bundle tube (11).

3. The armored temperature-measuring optical cable according to claim 2, characterized in that, The inner steel wire layer (21) is disposed on the outer periphery of the filling layer (14), and the braiding angle of the inner steel wire layer (21) and the outer steel wire layer (22) intersects at 60°.

4. The armored temperature-measuring optical cable according to claim 3, characterized in that, The reinforcing layer (3) includes a fiber layer (31), which is disposed on the outer periphery of the inner layer (21) and the outer layer (22) of the steel wire, and the outer periphery of the fiber layer (31) is spirally provided with an installation groove (32); A flexible layer (33) is disposed within the mounting groove (32).

5. The armored temperature-measuring optical cable according to claim 4, characterized in that, The sheath layer (4) includes a corrosion-resistant layer (41), which is disposed on the outer periphery of the fiber layer (31); An insulating layer (42) is disposed on the outer periphery of the corrosion-resistant layer (41); A wear-resistant layer (43) is disposed on the outer periphery of the insulating layer (42).

6. The armored temperature-measuring optical cable according to claim 5, characterized in that, The bundle tube (11) is made of heat-resistant material.

7. The armored temperature-measuring optical cable according to claim 6, characterized in that, The diameter and helix density of the inner layer (21) of the steel wire are different from those of the outer layer (22) of the steel wire.

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