Cable well distributed temperature measurement optical fiber laying system and temperature measurement optical fiber laying method

Abstract

The invention discloses a cable well distributed temperature measurement optical fiber laying system and a temperature measurement optical fiber laying method, and belongs to the field of cable laying engineering.The laying system comprises a temperature measurement optical fiber and a plurality of Z-shaped supports; the Z-shaped bracket is fixed on the top wall of the cable well or the bottom wall of the cable well; the Z-shaped supports are arranged perpendicular to the extending direction of the cable well, and the multiple Z-shaped supports are sequentially arranged in the extending direction of the cable well. The temperature measuring optical fibers are sequentially arranged on the plurality of Z-shaped brackets along the extension direction of the cable well; an optical fiber fixing piece is detachably installed on the Z-shaped support. And the optical fiber fixing piece is used for fixing the temperature measuring optical fiber on the Z-shaped bracket. According to the invention, the temperature measurement optical fiber is laid in the cable channel in a radiation manner, so that the temperature measurement optical fiber is prevented from being interfered by cable displacement, the real-time monitoring function of the internal temperature of the cable channel is realized, the installation efficiency can be improved through the radiation laying manner, the purchasing and laying cost of the temperature measurement optical fiber is greatly reduced, and the method is more economical and practical.

Description

Technical Field

[0001] The invention belongs to the field of cable laying engineering, and in particular relates to a cable well distributed temperature measurement optical fiber laying system and a temperature measurement optical fiber laying method. Background Art

[0002] In the power distribution system, the cable channel is an infrastructure that can carry a large number of power, communication, and data transmission lines, and is also one of the important infrastructures of modern cities. When in use, it is necessary to monitor the operating conditions of the 10kV cables laid in the cable channel to ensure that the cables can be used stably and safely for a long time.

[0003] At present, because cables are often stacked and laid in local trunk cable channels, and a large number of low-voltage lines, communication cables, etc. are laid in the same trench as high-voltage cable channels, as the power system operates for a longer time, low-voltage cables are very likely to short-circuit and catch fire, which in turn ignites the optical fiber and high-voltage cables in the same trench, causing a large-scale cable group injury incident, seriously affecting the operation safety of the cables. Therefore, the temperature inside the cables and cable channels is an important parameter that the distribution system needs to pay attention to at all times when monitoring. However, traditional temperature monitoring systems are often limited to point monitoring, and cannot achieve real-time online monitoring of cable temperature. Often, an alarm can only be issued through the alarm system after an accident occurs to notify the staff, which is inefficient, difficult to investigate accidents in a timely manner, and unable to ensure the stability of the operation of the power system.

[0004] In order to achieve real-time online monitoring of cable temperature, a temperature monitoring system based on optical fiber sensing technology is currently used, and temperature-sensitive optical fiber is used to monitor the cable temperature in real time to ensure the timeliness of data monitoring. However, the current laying method of temperature-sensitive optical fiber is to lay it close to and bind it to the cable. Since the distance of the cable channel is often very long, this method will make the installation time-consuming and labor-intensive, increase the difficulty and cost of installation; and each optical fiber can only measure the temperature data of one of the cables that is close to it, and cannot fully monitor the temperature condition of the entire cable channel, resulting in a large number of optical fibers used and high laying costs; in addition, since this installation method causes the temperature-sensitive optical fiber to be in direct contact with the cable, there is also the possibility that the temperature-sensitive optical fiber will be damaged due to the movement and vibration of the cable, shortening the service life of the temperature-sensitive optical fiber and increasing the cost of use. Therefore, there is an urgent need for a temperature optical fiber laying system and laying method that can solve the above problems. Summary of the invention

[0005] The purpose of the present invention is to provide a distributed temperature measurement optical fiber laying system and a temperature measurement optical fiber laying method for cable wells in view of the above shortcomings, and to solve the problems of low efficiency, high laying cost and risk of damage caused by direct contact with cables of the current temperature sensing optical fiber laying. To achieve the above purpose, the present invention provides the following technical solutions:

[0006] A distributed temperature measurement optical fiber laying system for a cable well, comprising a temperature measurement optical fiber and a plurality of Z-shaped brackets; the Z-shaped brackets are fixed on the top wall or the bottom wall of the cable well; the Z-shaped brackets are arranged perpendicular to the extension direction of the cable well, and the plurality of Z-shaped brackets are arranged in sequence along the extension direction of the cable well; the temperature measurement optical fiber is arranged in sequence on the plurality of Z-shaped brackets along the extension direction of the cable well; an optical fiber fixing piece is also detachably mounted on the Z-shaped bracket; the optical fiber fixing piece is used to fix the temperature measurement optical fiber on the Z-shaped bracket.

[0007] Furthermore, the Z-shaped bracket includes a fixed side horizontal edge, a beveled edge and an installation side horizontal edge connected in sequence; the fixed side horizontal edges of several Z-shaped brackets are fixed on a side wall surface of the top wall or the bottom wall of the cable well; the optical fiber fixing part is detachably installed on the installation side horizontal edge of the Z-shaped bracket.

[0008] Furthermore, a plurality of Z-shaped brackets are arranged at equal intervals in the cable well, and the distance between two adjacent Z-shaped brackets ranges from 1m to 1.5m.

[0009] Furthermore, the vertical distance between the temperature measuring optical fiber installed on each Z-shaped bracket and the cable well wall corresponding to the fixed side horizontal edge of the Z-shaped bracket is the same, and the vertical distance range is between 75mm and 150mm.

[0010] It further includes a distributed optical fiber temperature measurement host; the starting end of the temperature measurement optical fiber is connected to the distributed optical fiber temperature measurement host.

[0011] A method for laying distributed temperature measurement optical fiber in a cable channel, using any of the above-mentioned distributed temperature measurement optical fiber laying systems, comprises the following steps:

[0012] Step S1: according to the cable laying requirements, a cable channel extending from the cable laying starting point to the cable laying end point is set, the cable channel includes a number of cable wells connected in sequence, and every two adjacent cable wells are connected through a dark ditch or a number of drainage pipes; according to the overall laying of cables in the cable channel, the model and quantity of the Z-type bracket are selected and the installation position of the Z-type bracket is determined; then, the Z-type bracket is set perpendicular to the direction in which the cable extends, and a number of Z-type brackets are sequentially extended and laid in each cable well along the direction in which the cable extends; and between two adjacent cable wells, a number of Z-type brackets are arranged accordingly according to the connection method and connection condition between the two adjacent cable wells;

[0013] Step S2: The distributed optical fiber temperature measurement host is set in the switch station outside the cable channel, and the starting end of the temperature measurement optical fiber is connected to the distributed optical fiber temperature measurement host; and the temperature measurement optical fiber leaves a preset first optical fiber margin section between the switch station and the cable channel;

[0014] Step S3: in each cable well, the temperature measuring optical fiber is sequentially laid along the direction of cable extension and fixed on a plurality of Z-shaped brackets; between two adjacent cable wells, a plurality of pipes or dark trenches are provided according to the connection mode, so that the temperature measuring optical fiber selects to pass through one of the pipes or enters the next cable well from the previous cable well through the dark trench along the direction of cable extension; and a preset second optical fiber margin section is left between the two adjacent cable wells for the temperature measuring optical fiber;

[0015] Step S4: coil the tail end of the temperature measuring optical fiber into a ring shape, and then apply grease on the surface of the tail end of the ring-shaped temperature measuring optical fiber to seal it.

[0016] In step S1, if two adjacent cable wells are connected by a plurality of pipes, no Z-shaped bracket is set between the two cable wells; if two adjacent cable wells are connected by a culvert, a plurality of Z-shaped brackets are arranged in the culvert along the direction in which the cables extend.

[0017] When two adjacent cable wells are connected by a culvert, if the two adjacent cable wells extend in the same direction, the arrangement of several Z-shaped brackets in the culvert is the same as that in the cable well; if the two adjacent cable wells extend in different directions, the culvert is inclined relative to the two cable wells, and several Z-shaped brackets are arranged in sequence in the culvert at equal intervals along a direction perpendicular to the extension direction of the culvert.

[0018] In the step S1, the installation position of the Z-shaped bracket is specifically the center of the top wall of the cable well or the center of the bottom wall of the cable well.

[0019] The beneficial effects of the present invention are:

[0020] The present invention discloses a distributed temperature measurement optical fiber laying system and a temperature measurement optical fiber laying method in a cable well, belonging to the field of cable laying engineering, the laying system includes a temperature measurement optical fiber and a plurality of Z-shaped brackets; the Z-shaped bracket is fixed on the top wall or the bottom wall of the cable well; the Z-shaped bracket is arranged perpendicular to the extension direction of the cable well, and the plurality of Z-shaped brackets are arranged in sequence along the extension direction of the cable well; the temperature measurement optical fiber is arranged on the plurality of Z-shaped brackets in sequence along the extension direction of the cable well; the Z-shaped bracket is also detachably provided with an optical fiber fixing member; the optical fiber fixing member is used to fix the temperature measurement optical fiber on the Z-shaped bracket. The present invention avoids the temperature measurement optical fiber from being disturbed by the displacement of the cable by the temperature measurement optical fiber laid radially in the cable channel, realizes the real-time monitoring function of the internal temperature of the cable channel, and the radial laying method can also improve the installation efficiency, and greatly reduce the purchase and laying costs of the temperature measurement optical fiber, which is more economical and practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the structure of laying the cable and the temperature measuring optical fiber in the cable well of the present invention, wherein the Z-shaped bracket is installed on the top wall of the cable channel;

[0022] Figure 2 The present invention Figure 1 Schematic diagram of the three-dimensional structure at structure A;

[0023] Figure 3 It is a schematic diagram of the structure of laying the cable and the temperature measuring optical fiber in the cable well of the present invention, wherein the Z-shaped bracket is installed on the bottom wall of the cable channel;

[0024] Figure 4 It is a structural schematic diagram of the temperature measuring optical fiber laying when two adjacent cable wells extend in different directions and are connected through a dark trench according to the present invention;

[0025] Figure 5 It is a structural schematic diagram of the temperature measuring optical fiber laying when two adjacent cable wells extend in the same direction and are connected by a pipe arrangement;

[0026] In the attached figure: 1. Temperature measuring optical fiber; 2. Z-shaped bracket; 3. Cable well; 4. Optical fiber fixing part; 31. Concealed ditch; 32. Drain pipe. DETAILED DESCRIPTION

[0027] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0028] In the description of the present invention, "first feature" or "second feature" may include one or more of the features.

[0029] In the description of the present invention, "plurality" means two or more.

[0030] In the description of the present invention, a first feature being “on” or “under” a second feature may include that the first and second features are directly in contact with each other, or may include that the first and second features are not in direct contact with each other but are in contact with each other via another feature therebetween.

[0031] In the description of the present invention, “on”, “over” and “above” a first feature from a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature.

[0032] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", "some examples", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. The present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods, but the present invention is not limited to the following embodiments.

[0033] Embodiment 1:

[0034] See attached Figures 1 to 3 A distributed temperature measurement optical fiber laying system for a cable well, comprising a temperature measurement optical fiber 1 and a plurality of Z-shaped brackets 2; the Z-shaped brackets 2 are fixed on the top wall of a cable well 3 or the bottom wall of a cable well 3; the Z-shaped brackets 2 are arranged perpendicular to the extension direction of the cable well 3, and the plurality of Z-shaped brackets 2 are arranged in sequence along the extension direction of the cable well 3; the temperature measurement optical fiber 1 is arranged on the plurality of Z-shaped brackets 2 in sequence along the extension direction of the cable well 3; an optical fiber fixing part 4 can also be detachably installed on the Z-shaped bracket 2; the optical fiber fixing part 4 is used to fix the temperature measurement optical fiber 1 on the Z-shaped bracket 2.

[0035] As can be seen from the above structure, the cable channel is generally used as the installation basis for distribution cables and other power equipment with voltages of 10kV and below, and is constructed according to engineering requirements. The cable channel includes several cable wells 3 that are connected in sequence and allow cables to pass through, and several cables will be divided into two groups, symmetrically installed on the multi-layer cable brackets set on the left and right sides of the cable well 3, and then extended along the laying direction required by the power engineering. The Z-type bracket 2 is used as the installation basis for the temperature measuring optical fiber 1. It will be selectively installed according to which side of the top wall or bottom wall of the cable well 3 is closer to the strong power side of the cable after the actual laying of the cable. For example, the cables are arranged "from top to bottom" from high to low voltage levels and from strong electricity to weak electricity. In this case, the strong power side of the cable is close to the top wall of the cable well 3, so several Z-type brackets 2 are selected to be installed on the top wall of the cable well 3, and the Z-type brackets 2 are arranged perpendicular to the extension direction of the cable well 3, and several Z-type brackets 2 are arranged in sequence along the extension direction of the cable well 3. The temperature measuring optical fiber 1 is sequentially arranged on a plurality of Z-shaped brackets 2 along the extension direction of the cable well 3, and then the position between the temperature measuring optical fiber 1 and the Z-shaped bracket 2 is fixed by the optical fiber fixing member 4 on the Z-shaped bracket 2, so that the temperature measuring optical fiber 1 can perform real-time temperature monitoring inside the cable channel by radiation. Specifically, the optical fiber fixing member 4 can adopt the U-shaped pipe clamp in the prior art, and the length of the temperature measuring optical fiber 1 is set according to the demand, and the length requirement of the temperature measuring optical fiber 1 can be met by fusing multiple optical fibers into one. The present invention only needs to install one temperature measuring optical fiber 1 in the cable channel to realize the real-time monitoring function of the temperature inside the cable channel, and the temperature measuring optical fiber 1 does not need to be closely attached or tied to the cable, so that the temperature measuring optical fiber 1 will not be affected by the movement and vibration of the cable, and has high anti-interference performance and can extend the service life. And since only one temperature measuring optical fiber 1 needs to be installed in the cable channel, the installation efficiency can be improved, and the number of temperature measuring optical fibers 1 used can be greatly reduced, which greatly reduces the purchase and laying costs of the temperature measuring optical fiber 1, and is more economical and practical.

[0036] Embodiment 2:

[0037] See attached Figures 1 to 4. On the basis of the first embodiment, the Z-shaped bracket 2 includes a fixed side horizontal edge, a bevel edge and an installation side horizontal edge connected in sequence; the fixed side horizontal edges of several Z-shaped brackets 2 are fixed on the top wall of the cable well 3 or one side wall of the bottom wall of the cable well 3; the optical fiber fixing part 4 is detachably mounted on the installation side horizontal edge of the Z-shaped bracket 2. It can be seen from the above structure that the fixed side horizontal edge of the Z-shaped bracket 2 is used to be fixedly mounted on the cable well 3 through a connector, and the installation side horizontal edge of the Z-shaped bracket 2 is used to install the temperature measuring optical fiber 1, and the optical fiber fixing part 4 is detachably mounted on the installation side horizontal edge of the Z-shaped bracket 2, and can be disassembled and assembled on the Z-shaped bracket 2 through the optical fiber fixing part 4, and the temperature measuring optical fiber 1 can be fixed on the Z-shaped bracket 2, or removed from the Z-shaped bracket 2, so as to facilitate the adjustment and replacement of the temperature measuring optical fiber 1 during the operation of the power system. Specifically, the optical fiber fixing part 4 can be fixed in the center of the corresponding installation side horizontal edge.

[0038] Several Z-shaped brackets 2 are arranged at equal intervals in the cable well 3, and the distance between two adjacent Z-shaped brackets 2 is between 1m and 1.5m. As can be seen from the above structure, equidistantly arranging several Z-shaped brackets 2 in the cable well 3 can ensure that the force on the temperature measuring optical fiber 1 in the extension direction is as consistent as possible, and limiting the distance between two adjacent Z-shaped brackets 2 to between 1m and 1.5m can prevent the temperature measuring optical fiber 1 from being installed unstably and loosely between two adjacent Z-shaped brackets 2, thereby ensuring the detection accuracy of the temperature measuring optical fiber 1. Specifically, the distance between two adjacent Z-shaped brackets 2 can also be selected to be 1.1m, 1.2m, 1.3m, or 1.4m.

[0039] The vertical distance between the temperature measuring optical fiber 1 installed on each Z-shaped bracket 2 and the wall of the cable well 3 corresponding to the fixed side horizontal edge of the Z-shaped bracket 2 is the same, and the vertical distance range is between 75mm-150mm. It can be seen from the above structure that a certain vertical distance is left between the temperature measuring optical fiber 1 and the wall of the cable well 3 because when the vertical distance between the temperature measuring optical fiber 1 and the wall of the cable well 3 is too close, it will lead to poor ventilation effect; when the vertical distance between the temperature measuring optical fiber 1 and the wall of the cable well 3 is too far, it will affect the temperature response effect of the temperature measuring optical fiber 1. Therefore, the vertical distance range between the temperature measuring optical fiber 1 and the wall of the cable well 3 is set between 75mm-150mm in order to maintain good ventilation and ensure the temperature response effect. Specifically, the vertical distance between the temperature measuring optical fiber 1 and the wall of the cable well 3 can be selected as 80mm, 100mm, and 120mm.

[0040] It also includes a distributed optical fiber temperature measurement host; the starting end of the temperature measurement optical fiber 1 is connected to the distributed optical fiber temperature measurement host. As can be seen from the above structure, the starting end of the temperature measurement optical fiber 1 is connected to the distributed optical fiber temperature measurement host, and the distributed optical fiber temperature measurement host is used to collect the cable temperature signal inside the cable channel in real time and transmit it to the control background, so that the staff can monitor it in real time.

[0041] The tail end surface of the temperature measuring optical fiber 1 is coated with grease. As can be seen from the above structure, the tail end surface of the temperature measuring optical fiber 1 is coated with grease, which can waterproof the tail end of the temperature measuring optical fiber 1 on the one hand, and prevent natural light from entering the optical fiber and affecting the detection accuracy of the cable temperature parameters on the other hand.

[0042] Embodiment three:

[0043] See attached Figures 1 to 5 A method for laying distributed temperature measurement optical fiber in a cable channel, using a distributed temperature measurement optical fiber laying system as described in any one of the second embodiments, comprises the following steps:

[0044] Step S1: according to the cable laying requirements, a cable channel extending from the cable laying starting point to the cable laying end point is set, the cable channel includes a plurality of cable wells 3 connected in sequence, and every two adjacent cable wells 3 are connected through a dark ditch 31 or a plurality of drainage pipes 32; according to the overall laying of the cables in the cable channel, the model and quantity of the Z-shaped bracket 2 and the installation position of the Z-shaped bracket 2 are selected; then, the Z-shaped bracket 2 is set perpendicular to the direction in which the cables extend, and a plurality of Z-shaped brackets 2 are sequentially extended and laid in each cable well 3 along the direction in which the cables extend; and between two adjacent cable wells 3, a plurality of Z-shaped brackets 2 are arranged accordingly according to the connection mode and connection condition between the two adjacent cable wells 3;

[0045] Step S2: The distributed optical fiber temperature measurement host is set in the switch station outside the cable channel, and the starting end of the temperature measurement optical fiber 1 is connected to the distributed optical fiber temperature measurement host; and the temperature measurement optical fiber 1 leaves a preset first optical fiber margin section between the switch station and the cable channel;

[0046] Step S3: in each cable well 3, the temperature measuring optical fiber 1 is sequentially laid along the direction of cable extension and fixed on a plurality of Z-shaped brackets 2; between two adjacent cable wells 3, a plurality of row pipes 32 or dark trenches 31 are provided according to the connection mode, so that the temperature measuring optical fiber 1 can choose to pass through one of the row pipes 32 or enter the next cable well 3 from the previous cable well 3 through the dark trench 31 along the direction of cable extension; and a preset second optical fiber surplus section is left between two adjacent cable wells 3 for the temperature measuring optical fiber 1;

[0047] Step S4: coil the tail end of the temperature measuring optical fiber 1 into a ring shape, and then apply grease on the tail end surface of the ring-shaped temperature measuring optical fiber 1 to seal it.

[0048] In the cable channel for cable laying, a plurality of interconnected cable wells 3 are set, and every two adjacent cable wells 3 are connected through a dark ditch 31 or a plurality of drainage pipes 32, so that the cable is laid from the cable laying starting point to the cable laying end point through a plurality of cable wells 3. Therefore, according to the cable laying conditions in the cable channel, the required model and quantity of the Z-type bracket 2 are selected, and the installation position of the Z-type bracket 2 is determined, and then a plurality of Z-type brackets 2 are laid in each cable well 3 to serve as the installation basis of the temperature measuring optical fiber 1. Specifically, the specific interval range between two adjacent Z-type brackets 2 can be set to 1m-1.5m.

[0049] The starting end of the temperature measuring optical fiber 1 is connected to the distributed optical fiber temperature measuring host of the switch station located outside the cable channel, and the temperature measuring optical fiber 1 leaves a preset first optical fiber surplus section between the switch station and the cable channel, so that when a fiber break occurs in the temperature measuring optical fiber 1 inside the first cable well 3 in the cable channel, the first optical fiber surplus section can be released to meet the fusion length requirement of the fiber break point. Between two adjacent cable wells 3, the temperature measuring optical fiber 1 leaves a preset second optical fiber surplus section, on the one hand, to ensure the accurate positioning of the temperature measuring optical fiber 1 during the temperature measurement and positioning process, and on the other hand, if a fiber break occurs between the cable wells 3, the second optical fiber surplus section in each cable well 3 can be used as a reference point for reference, so that the staff can check one by one according to each reference point, thereby improving the efficiency of checking the fiber break point.

[0050] The tail end of the temperature measuring optical fiber 1 passes through the cable well 3 at the end, and passes through several Z-shaped brackets 2 arranged in the cable well 3 in turn and then continues to pass outward. Then the tail end of the temperature measuring optical fiber 1 is coiled into a ring, and ointment is coated on the surface of the ring-shaped tail end for sealing. On the one hand, the temperature measuring optical fiber 1 is waterproofed, and on the other hand, natural light can be prevented from entering the optical fiber, thereby ensuring the detection accuracy of the cable temperature value by the temperature measuring optical fiber 1.

[0051] In step S1, if two adjacent cable wells 3 are connected by a plurality of drainage pipes 32, no Z-shaped bracket 2 is set between the two cable wells 3; if two adjacent cable wells 3 are connected by a culvert 31, a plurality of Z-shaped brackets 2 are arranged accordingly in the culvert 31 along the direction in which the cable extends.

[0052] When two adjacent cable wells 3 are connected by a dark ditch, if the two adjacent cable wells 3 extend in the same direction, the arrangement of the plurality of Z-shaped brackets 2 in the dark ditch 31 is the same as that in the cable well 3; if the two adjacent cable wells 3 extend in different directions, the dark ditch 31 is inclined relative to the two cable wells 3, and the plurality of Z-shaped brackets 2 are arranged in sequence in the dark ditch at equal intervals along a direction perpendicular to the extension direction of the dark ditch 31. Figure 4The figure shows the arrangement of several Z-shaped brackets 2 in the dark trench when two adjacent cable wells 3 extend in different directions and are connected in a dark trench 31. The Z-shaped brackets 2 in the dark trench 31 are inclined relative to the Z-shaped brackets 2 in the cable well 3 and are arranged equidistantly, so as to facilitate the turning arrangement of the temperature measuring optical fiber 1 to meet the laying requirements. Specifically, the specific interval range between two adjacent Z-shaped brackets 2 in the dark trench can also be set to 1m-1.5m.

[0053] The present invention is attached Figure 5 It also shows the arrangement of the temperature measuring optical fiber 1 passing through the row of pipes 32 when two adjacent cable wells 3 extend in the same direction and are connected in the form of a row of pipes 32. Among the multiple row of pipes 32 connecting the two adjacent cable wells 3, only one is left for the temperature measuring optical fiber 1 to pass through, and the rest are used for cables and other pipelines to pass through.

[0054] In step S1, the installation position of the Z-shaped bracket 2 is specifically the center of the top wall of the cable well 3 or the center of the bottom wall of the cable well 3. Since the cables are evenly distributed on both sides of the cable channel, the Z-shaped bracket 2 is arranged at the center of the top wall or the center of the bottom wall of the cable channel, so that the distance from the temperature measuring optical fiber 1 to the cables on the left and right sides is equal, which can ensure the monitoring effect of the temperature measuring optical fiber 1 on the cables distributed on both sides of the cable channel.

[0055] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A distributed temperature measurement optical fiber laying system for cable wells, characterized by: It includes a temperature measuring optical fiber and a plurality of Z-shaped brackets; the Z-shaped brackets are fixed on the top wall or the bottom wall of the cable well; the Z-shaped brackets are arranged perpendicular to the extension direction of the cable well, and the plurality of Z-shaped brackets are arranged in sequence along the extension direction of the cable well; the temperature measuring optical fiber is arranged on the plurality of Z-shaped brackets in sequence along the extension direction of the cable well; the Z-shaped brackets are also detachably provided with optical fiber fixings; the optical fiber fixings are used to fix the temperature measuring optical fiber on the Z-shaped brackets.

2. The cable well distributed temperature measurement optical fiber laying system according to claim 1 is characterized by: The Z-shaped bracket includes a fixed side horizontal edge, a bevel edge and an installation side horizontal edge connected in sequence; the fixed side horizontal edges of several Z-shaped brackets are fixed on a side wall surface of the top wall or the bottom wall of the cable well; the optical fiber fixing part is detachably installed on the installation side horizontal edge of the Z-shaped bracket.

3. The cable well distributed temperature measurement optical fiber laying system according to claim 1 is characterized by: Several Z-shaped brackets are arranged at equal intervals in the cable well, and the distance between two adjacent Z-shaped brackets ranges from 1m to 1.5m.

4. The cable well distributed temperature measurement optical fiber laying system according to claim 1 is characterized by: The vertical distance between the temperature measuring optical fiber installed on each Z-shaped bracket and the cable well wall corresponding to the fixed side horizontal edge of the Z-shaped bracket is the same, and the vertical distance range is between 75mm and 150mm.

5. The cable well distributed temperature measurement optical fiber laying system according to claim 1 is characterized by: It also includes a distributed optical fiber temperature measurement host; the starting end of the temperature measurement optical fiber is connected to the distributed optical fiber temperature measurement host.

6. The cable well distributed temperature measurement optical fiber laying system according to claim 1 is characterized by: The tail end surface of the temperature measuring optical fiber is coated with grease.

7. A distributed temperature measurement optical fiber laying method, using the distributed temperature measurement optical fiber laying system according to any one of claims 1 to 6, characterized in that: The following steps are involved: Step S1: according to the cable laying requirements, a cable channel extending from the cable laying starting point to the cable laying end point is set, the cable channel includes a number of cable wells connected in sequence, and every two adjacent cable wells are connected through a dark ditch or a number of drainage pipes; according to the overall laying of cables in the cable channel, the model and quantity of the Z-type bracket are selected and the installation position of the Z-type bracket is determined; then, the Z-type bracket is set perpendicular to the direction in which the cable extends, and a number of Z-type brackets are sequentially extended and laid in each cable well along the direction in which the cable extends; and between two adjacent cable wells, a number of Z-type brackets are arranged accordingly according to the connection method and connection condition between the two adjacent cable wells; Step S2: The distributed optical fiber temperature measurement host is set in the switch station outside the cable channel, and the starting end of the temperature measurement optical fiber is connected to the distributed optical fiber temperature measurement host; and the temperature measurement optical fiber leaves a preset first optical fiber margin section between the switch station and the cable channel; Step S3: in each cable well, the temperature measuring optical fiber is sequentially laid along the direction of cable extension and fixed on a plurality of Z-shaped brackets; between two adjacent cable wells, a plurality of pipes or dark trenches are provided according to the connection mode, so that the temperature measuring optical fiber selects to pass through one of the pipes or enters the next cable well from the previous cable well through the dark trench along the direction of cable extension; and a preset second optical fiber margin section is left between the two adjacent cable wells for the temperature measuring optical fiber; Step S4: coil the tail end of the temperature measuring optical fiber into a ring shape, and then apply grease on the surface of the tail end of the ring-shaped temperature measuring optical fiber to seal it.

8. The distributed temperature measurement optical fiber laying method according to claim 7 is characterized in that: In step S1, if two adjacent cable wells are connected by a plurality of pipes, no Z-shaped bracket is set between the two cable wells; if two adjacent cable wells are connected by a culvert, a plurality of Z-shaped brackets are arranged in the culvert along the direction in which the cables extend.

9. The distributed temperature measurement optical fiber laying method according to claim 8, characterized in that: When two adjacent cable wells are connected by a culvert, if the two adjacent cable wells extend in the same direction, the arrangement of several Z-shaped brackets in the culvert is the same as that in the cable well; if the two adjacent cable wells extend in different directions, the culvert is inclined relative to the two cable wells, and several Z-shaped brackets are arranged in sequence in the culvert at equal intervals along a direction perpendicular to the extension direction of the culvert.

10. The distributed temperature measurement optical fiber laying method according to claim 7, characterized in that: In the step S1, the installation position of the Z-shaped bracket is specifically the center of the top wall of the cable well or the center of the bottom wall of the cable well.

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