Construction method of thermodynamic system and thermodynamic system

Abstract

The invention relates to the technical field of heat distribution pipeline construction, in particular to a construction method of a thermodynamic system and the thermodynamic system. The construction method of the thermodynamic system comprises the steps of determining a target construction mode based on environment information of a preset line; under the condition that the target construction mode is trench construction, determining whether the preset line comprises an intersection or not; under the condition that the intersection is included, the construction sequence of the intersection and other road sections on the preset line is determined; the road sections are communicated through intersections; according to the construction sequence, a target groove is excavated in the preset line; the target grooves are grooves needing to be excavated in the first batch in the construction sequence; based on the construction sequence and the length of the target groove, determining the target installation length of the temperature measurement optical fiber in the reserved groove; the temperature measuring optical fiber is used for measuring leakage points of the heat distribution pipeline; the target groove comprises a reserved groove; a heat distribution pipeline is installed in the target groove; the temperature measurement optical fiber with the target installation length is installed on the heat distribution pipeline; and backfilling the target groove. And welding points of the temperature measuring optical fiber are reduced.

Description

Technical Field

[0001] The present application relates to the technical field of thermal pipeline construction, and in particular to a thermal system construction method and a thermal system. Background Art

[0002] At present, due to the leakage problem of thermal pipelines, they are often not discovered until a lot of water is leaked, so that they can be repaired. However, the large amount of water that has leaked will cause a waste of water resources and affect the normal operation of the thermal pipeline. In the related art, a distributed optical fiber temperature measurement system is used to realize the temperature monitoring function of the thermal pipeline. When each section is constructed separately, a temperature measurement optical fiber matching the length of each section is set in each groove, and then the two ends of the temperature measurement optical fiber in each section are fused in turn to form a connected temperature measurement optical fiber, so as to realize the temperature measurement function using the temperature measurement optical fiber.

[0003] However, the temperature measuring optical fiber constructed as above has a large number of fusion points, which may cause the light in the temperature measuring optical fiber to change during transmission, resulting in inaccurate measurement.

[0004] Therefore, it is urgent to propose a solution to solve the above problems. Summary of the invention

[0005] The thermal system construction method and thermal system provided in the embodiments of the present application reduce the fusion points of the temperature measuring optical fiber, reduce the abnormal changes of light in the temperature measuring optical fiber, improve the monitoring quality of the temperature and leakage points of the thermal pipeline by the distributed temperature measurement system, and can extend the service life of the temperature measuring optical fiber.

[0006] In some embodiments, a construction method for a thermal system is provided, wherein the thermal system includes a leak detection system and a thermal pipeline, the leak detection system includes a temperature measuring optical fiber, the installation position of the thermal pipeline is a preset line, and the construction method of the thermal system includes: determining a target construction method based on environmental information of the preset line; when the target construction method is trench construction, determining whether the preset line includes an intersection; when the intersection is included, determining the construction sequence of the intersection and other sections on the preset line; the sections are connected through the intersection; according to the construction sequence, excavating a target trench on the preset line; the target trench is the first batch of trenches to be excavated in the construction sequence; based on the construction sequence and the length of the target trench, determining the target installation length of the temperature measuring optical fiber in the reserved trench; the temperature measuring optical fiber is used to measure the leakage point of the thermal pipeline; the target trench includes a reserved trench; installing the thermal pipeline in the target trench; installing the temperature measuring optical fiber of the target installation length on the thermal pipeline; and backfilling the target trench.

[0007] By adopting the construction method of the thermal system provided in the embodiment of the present application, by judging the construction method and whether it involves intersections and other related issues that may cause the temperature measuring optical fiber to form a fusion point, the melting point of the temperature measuring optical fiber can be reduced, the abnormal changes of light in the temperature measuring optical fiber can be reduced, the monitoring quality of the temperature and leakage points of the thermal pipeline by the distributed temperature measurement system can be improved, and the service life of the temperature measuring optical fiber can be extended.

[0008] Optionally, the preset route includes an intersection, a first section and a second section, the other sections include the first section and the second section, the first section and the second section are connected through the intersection; the groove corresponding to the first section is the first groove, the groove corresponding to the second section is the second groove, and the groove corresponding to the intersection is the third groove; the construction sequence includes the first construction sequence, the second construction sequence and the third construction sequence; the first construction sequence includes: the first batch of grooves to be excavated are the first groove and the second groove, the first batch of grooves to be backfilled are the first groove or the second groove, and the second batch of grooves to be excavated are The third trench, the second batch of trenches that need to be backfilled are the third trench and the trenches other than the trenches that need to be backfilled in the first batch; the second construction sequence includes: the first batch of trenches that need to be excavated are the first trench and the second trench, the first batch of trenches that need to be backfilled are the first trench and the second trench, the second batch of trenches that need to be excavated are the third trench, and the second batch of trenches that need to be backfilled are the third trench; the third construction sequence includes: the first batch of trenches that need to be excavated are the first trench, the second trench and the third trench, and the first batch of trenches that need to be backfilled are the first trench, the second trench and the third trench.

[0009] Optionally, the length of the first groove is the first length, the length of the second groove is the second length, and the length of the third groove is the third length; the reserved groove includes the first reserved groove or the second reserved groove; based on the construction sequence and the length of the target groove, the target installation length of the temperature measuring optical fiber in the reserved groove is determined, including: when the construction sequence is the first construction sequence, the first batch of grooves that need to be backfilled are used as the first reserved groove; the temperature measuring optical fiber of the first target installation length is installed in the first reserved groove; the first target installation length is the sum of the first length and the third length; the target installation length includes the first target installation length; when the construction sequence is the second construction sequence, the first groove or the second groove is used as the second reserved groove ; Install the temperature measuring optical fiber of the second target installation length in the second reserved groove; the second target installation length is the sum of the length corresponding to the second reserved groove and the length of the third groove; in the target groove, install the temperature measuring optical fiber of the third target installation length in the grooves other than the second reserved groove; the third target installation length is the length of the grooves other than the second reserved groove; the target installation length includes the second target installation length and the third target installation length; when the construction sequence is the third construction sequence, arrange the temperature measuring optical fiber of the fourth target installation length in the first groove, the second groove and the third groove in sequence; the fourth target installation length is the sum of the first length, the second length and the third length; the target installation length includes the fourth target installation length.

[0010] Optionally, a thermal pipeline is installed in the target groove, including: the thermal pipeline includes a plurality of sub-pipes, each sub-pipe is welded to connect the sub-pipes to form the thermal pipeline; and the thermal pipeline is insulated.

[0011] Optionally, the target groove includes multiple welding pits, and the welding pits correspond to the connection points of the sub-pipes one by one; the temperature measuring optical fiber of the target installation length is installed on the thermal pipeline, including: at the welding pit, using a binding wire to fix the temperature measuring optical fiber and the thermal pipeline; the thermal pipeline includes a water supply pipe and a return pipe, and the temperature measuring optical fiber includes a first temperature measuring optical fiber and a second temperature measuring optical fiber, the first temperature measuring optical fiber is located between the groove wall of the target groove and the outer pipe wall of the water supply pipe, and the second temperature measuring optical fiber is located between the groove wall of the target groove and the outer pipe wall of the return pipe.

[0012] Optionally, the distance between the outer side wall of the temperature measuring optical fiber and the outer pipe wall of the thermal pipe is less than or equal to 20 cm.

[0013] Optionally, before installing the temperature measuring optical fiber of the target installation length on the thermal pipeline, the construction method of the thermal system also includes: making the temperature measuring optical fiber of the target installation length, the temperature measuring optical fiber being obtained by inserting the optical cable into the silicon core tube.

[0014] Optionally, after using binding wire to fix the temperature measuring optical fiber and the thermal pipeline, the construction method of the thermal system also includes: opening multiple water inlet holes on the silicon core tube of the temperature measuring optical fiber; the water inlet holes correspond one to one with the connection points of the sub-pipelines; the water inlet holes are round holes with a diameter of 4mm to 6mm.

[0015] Optionally, before installing the temperature measuring optical fiber of the target installation length on the thermal pipeline, the construction method of the thermal system also includes: making the temperature measuring optical fiber of the target installation length, the temperature measuring optical fiber is obtained by inserting the optical cable into the silicon core tube; after fixing the temperature measuring optical fiber and the thermal pipeline with binding wire, the construction method of the thermal system also includes: opening a plurality of water inlet holes on the silicon core tube of the temperature measuring optical fiber; the water inlet holes correspond one-to-one to the connection points of the sub-pipelines; the water inlet holes are round holes with a diameter of 4mm to 6mm.

[0016] Optionally, after backfilling the target trenches, the construction method of the thermal system also includes: excavating a second batch of trenches that need to be excavated according to the construction sequence; determining whether it is necessary to fuse the temperature measuring optical fiber; if welding is required, fusing the temperature measuring optical fiber to connect the temperature measuring optical fibers in the first trench and the second trench; and backfilling the second batch of trenches that need to be backfilled.

[0017] Optionally, the target construction method also includes pipe jacking construction; after determining the target construction method based on the environmental information of the preset line, the construction method of the thermal system also includes: when the target construction method is pipe jacking construction, installing the pipe jacking on the preset line; setting cement nails at preset fixed points on the inner pipe wall of the pipe jacking; using cement nails to fix the connection with the alternative temperature measuring optical fiber; the alternative temperature measuring optical fiber includes a silicon core tube and an alternative optical cable; installing a thermal pipeline in the pipe jacking; replacing the alternative optical cable with an optical cable; and backfilling the pipe jacking with sand.

[0018] Optionally, the target construction method also includes pipe jacking construction; after determining the target construction method based on the environmental information of the preset line, the construction method of the thermal system also includes: when the target construction method is pipe jacking construction, installing the pipe jacking on the preset line; installing a thermal pipeline in the pipe jacking; using a scooter to pass the temperature measuring optical fiber through the pipe jacking and install the temperature measuring optical fiber; and backfilling the pipe jacking using a sand blowing process.

[0019] In some embodiments, a thermal system is provided, which is obtained by using the construction method of the thermal system as in any of the above embodiments, and includes: a thermal pipeline and a leak detection system, the thermal pipeline is buried underground; the thermal pipeline is configured for urban heating; the leak detection system includes a temperature measuring optical fiber, the temperature measuring optical fiber is fixedly installed with the thermal pipeline; the temperature measuring optical fiber is configured to measure the temperature measuring point of the thermal pipeline.

[0020] It can be understood that the beneficial effects that can be achieved by the technical solution provided by the thermal system provided above can be referred to the beneficial effects of the construction method of the thermal system and any optional implementation method thereof, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solution of the present application, the drawings required for use in the embodiments are briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0022] Figure 1 A schematic diagram of a construction method of a thermal system provided in an embodiment of the present application; Figure 2 A schematic diagram of the construction of a thermal system including an intersection provided in an embodiment of the present application; Figure 3 The first road section and the second road section provided in the embodiment of the present application are schematic diagrams of road sections on both sides of an intersection; Figure 4 A schematic diagram of the distance between the temperature measuring optical fiber and the thermal pipeline provided in an embodiment of the present application; Figure 5 A schematic diagram of the construction of a thermal system excluding intersections provided in an embodiment of the present application; Figure 6 A schematic diagram of the first process of pipe jacking construction provided in the embodiment of the present application; Figure 7 A schematic diagram of a second process of pipe jacking construction provided in an embodiment of the present application; Figure 8 A schematic diagram of the operation of the scooter provided in an embodiment of the present application. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present application will be described clearly below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments of the present application, other embodiments obtained by ordinary technicians in this field without making creative work all belong to the protection scope of the present application.

[0024] In the following, the terms "first", "second", etc. are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0025] In addition, in the present application, directional terms such as "upper", "lower", "inner" and "outer" are defined relative to the orientation of the components schematically placed in the drawings. It should be understood that these directional terms are relative concepts. They are used for relative description and clarification, and they can change accordingly according to the changes in the orientation of the components placed in the drawings.

[0026] In order to facilitate the understanding of the technical solution of the application, the technical issues involved in this application are first explained below.

[0027] In the related art, the temperature monitoring function of the thermal pipeline is realized by using a distributed optical fiber temperature measurement system. When constructing each section separately, the temperature measurement optical fiber matching the length of each section is set in each groove, and then the two ends of the temperature measurement optical fiber in each section are fused in turn to form a connected temperature measurement optical fiber to realize the temperature measurement function using the temperature measurement optical fiber. However, the temperature measurement optical fiber constructed by the above-mentioned related art has a large number of melting points, which will cause the light in the temperature measurement optical fiber to vary during transmission, resulting in inaccurate measurement problems.

[0028] In order to solve the above technical problems, the present application proposes a construction method for a thermal system to reduce the melting point of the temperature measuring optical fiber, reduce the variation of light in the temperature measuring optical fiber, and improve the monitoring quality of the temperature and leakage points of the thermal pipeline by the distributed temperature measurement system.

[0029] Figure 1 A schematic flow chart of a construction method for a thermal system provided in an embodiment of the present application.

[0030] The present application provides a construction method for a thermal system, wherein the thermal system includes a leak detection system and a thermal pipeline, the leak detection system includes a temperature measuring optical fiber, and the installation position of the thermal pipeline is a preset line, such as Figure 1 As shown, the construction method of the thermal system includes steps S100 to S800, which are specifically as follows: Step S100, determining a target construction method based on environmental information of a preset line.

[0031] In this step, the environment information of the preset line includes an environment suitable for trench construction and an environment not suitable for trench construction. The target construction method used in the environment suitable for trench construction is trench construction, that is, after digging a trench on the surface, a thermal pipeline is laid in the trench. The target construction method used in the environment not suitable for trench construction is pipe jacking construction, that is, after installing the pipe jacking machine underground, a thermal pipeline is laid in the pipe jacking.

[0032] The preset route is a planned route for laying thermal pipelines. Specifically, the embodiment of the present application is a construction method for laying thermal pipelines on the preset route to reduce the melting point of the temperature measuring optical fiber when laying the thermal pipeline and improve the temperature and leakage detection capability of the temperature measuring optical fiber for the thermal pipeline.

[0033] Specifically, based on environmental information, it can be determined whether trench digging is suitable for construction on a preset route. If trench digging is suitable, trench construction is given priority, as trench construction can reduce construction costs and complexity.

[0034] For example, environments that are not suitable for trench construction include rivers or important transportation hubs. For example, when you want to pass a thermal pipeline through a river, it is not convenient to dig a trench under the river. Therefore, when the environmental information of the preset route includes a river, the target construction method is pipe jacking. Alternatively, when it is necessary to lay a thermal pipeline on a main line in the city or a road with a large traffic volume, because trench construction will affect the traffic volume of the main line, thereby causing traffic congestion, the target construction method is pipe jacking when the environmental information of the preset route includes an important transportation hub.

[0035] Step S200, when the target construction method is trench construction, determine whether the preset route includes an intersection.

[0036] In this step, if the preset route includes an intersection, the traffic flow at the intersection needs to be considered during construction to determine whether the construction will have a significant impact on traffic conditions. Therefore, the intersection and the roads on both sides of the intersection may not be constructed at the same time. In order to reduce the fusion points of the temperature measurement optical fiber, it is necessary to determine whether to reserve optical fibers in the roads on both sides according to the construction sequence of the intersection and the roads on both sides, so as to reduce the fusion points of the segmented optical fibers.

[0037] Figure 2 A schematic diagram of the construction of a thermal system including an intersection provided in an embodiment of the present application.

[0038] For example, in combination Figure 2 As shown in (a), the preset route 01 in the figure includes an intersection 09. The intersection 09 represents a complete intersection, and the intersection 12 represents a portion corresponding to the trench of the intersection that needs to be dug on the complete intersection.

[0039] Step S300, in the case of including an intersection, determining the construction sequence of the intersection and other sections on the preset route; the sections are connected through the intersection.

[0040] Optionally, the preset route includes an intersection, a first section and a second section, the other sections include the first section and the second section, the first section and the second section are connected through the intersection; the groove corresponding to the first section is the first groove, the groove corresponding to the second section is the second groove, and the groove corresponding to the intersection is the third groove. The construction sequence includes a first construction sequence, a second construction sequence and a third construction sequence. The first construction sequence includes: the first batch of trenches to be excavated are the first trench and the second trench, the first batch of trenches to be backfilled are the first trench or the second trench, the second batch of trenches to be excavated are the third trench, and the second batch of trenches to be backfilled are the third trench and the trenches other than the trenches to be backfilled in the first batch. The second construction sequence includes: the first batch of trenches to be excavated are the first trench and the second trench, the first batch of trenches to be backfilled are the first trench and the second trench, the second batch of trenches to be excavated are the third trench, and the second batch of trenches to be backfilled are the third trench; the third construction sequence includes: the first batch of trenches to be excavated are the first trench, the second trench and the third trench, and the first batch of trenches to be backfilled are the first trench, the second trench and the third trench.

[0041] In this embodiment, the first batch of trenches that need to be excavated, the first batch of trenches that need to be backfilled, the second batch of trenches that need to be excavated, and the second batch of trenches that need to be backfilled are determined according to the construction sequence, so that the installation length of the temperature measuring optical fiber in each groove can be determined according to the construction sequence, thereby reducing the fusion points of the temperature measuring optical fiber and improving the accuracy of the temperature and leakage point detection of the temperature measuring optical fiber.

[0042] For example, in combination Figure 2 As shown in (b), the preset route includes a junction 12 (09), a first section 10 and a second section 11. The groove corresponding to the first section 10 is a first groove 13, the groove corresponding to the second section 11 is a second groove 14, and the groove corresponding to the junction 12 is a third groove 15. The first construction sequence corresponds to Figure 2 (c) and (d). The second construction sequence corresponds to Figure 2 (e) and (f). The third construction sequence corresponds to Figure 2 In (g), the intersection 12 also indicates the location where a trench corresponding to the intersection needs to be dug on the complete intersection 09.

[0043] Specifically, combined Figure 2From (c) and (d), it can be seen that the first construction sequence is to first dig the grooves corresponding to the sections on both sides of the intersection (the first groove 13 and the second groove 14), and then backfill the grooves corresponding to the sections on either side of the intersection (the first groove 13), and then dig the groove corresponding to the intersection (the third groove 15), and backfill the grooves corresponding to the sections on one side that have not been backfilled (the second groove 14) and the grooves corresponding to the intersection (the third groove 15). Under the first construction sequence, it can be considered to first set up reserved optical fibers in the first batch of grooves that need to be backfilled, and then after digging the grooves at the intersection, directly pass the reserved optical fibers into the second batch of grooves that need to be backfilled (i.e., the intersection and the section on one side that has not been backfilled), thereby reducing the melting point caused by welding the temperature measurement optical fibers at both ends of the intersection.

[0044] Specifically, combined Figure 2 As shown in (e) and (f), the second construction sequence is to first dig the grooves (first groove 13 and second groove 14) corresponding to the sections on both sides of the intersection, and then backfill the grooves (first groove 13 and second groove 14) corresponding to the sections on both sides of the intersection. Then, dig the groove (third groove 15) corresponding to the intersection, and backfill the groove (third groove 15) corresponding to the intersection. Under the second construction sequence, it is possible to consider first setting a reserved temperature measurement optical fiber in any of the first batch of grooves that need to be backfilled, and then after digging the grooves of the intersection, directly pass the reserved temperature measurement optical fiber into the second batch of grooves that need to be backfilled (i.e., the intersection and the section on one side that has not been backfilled), and weld the grooves at both ends of the intersection, thereby reducing the melting point caused by welding the temperature measurement optical fiber at both ends of the intersection.

[0045] Specifically, combined Figure 2 As shown in (g), the third construction sequence is to fill the grooves corresponding to the road sections on both sides of the intersection and the grooves corresponding to the intersection (the first groove 13, the second groove 14 and the third groove 15) at the same time, and then backfill the grooves corresponding to the road sections on both sides of the intersection and the grooves corresponding to the intersection (the first groove 13, the second groove 14 and the third groove 15). Under the third construction sequence, the temperature measuring optical fiber can be directly laid to the grooves corresponding to the road sections on both sides of the intersection and the grooves corresponding to the intersection, thereby reducing the melting point caused by fusing the temperature measuring optical fiber at both ends of the intersection.

[0046] Figure 3 The first road section and the second road section provided in the embodiment of the present application are schematic diagrams of road sections on both sides of an intersection.

[0047] It should be understood that the first section and the second section provided in the embodiment of the present application may be sections arranged on opposite sides of the intersection (combined with Figure 2 The first road section 10 and the second road section 11 shown in (b) may also be road sections on both sides of the intersection (i.e., the preset route is a route with a corner, combined with Figure 3The first section 10 and the second section 11 are shown), and this application does not impose any restrictions on this.

[0048] Step S400, excavating a target trench on a preset route according to a construction sequence; the target trench is a trench that needs to be excavated in the first batch in the construction sequence.

[0049] Step S500, based on the construction sequence and the length of the target groove, determine the target installation length of the temperature measuring optical fiber in the reserved groove; the temperature measuring optical fiber is used to measure the leakage point of the thermal pipeline; the target groove includes the reserved groove.

[0050] Optionally, the length of the first groove is the first length, the length of the second groove is the second length, and the length of the third groove is the third length; the reserved groove includes the first reserved groove or the second reserved groove; step S500 includes steps S501 to S503, which are specifically as follows: Step S501, when the construction sequence is the first construction sequence, the first batch of grooves that need to be backfilled are used as the first reserved groove; a temperature measuring optical fiber with a first target installation length is installed in the first reserved groove; the first target installation length is the sum of the first length and the third length; the target installation length includes the first target installation length.

[0051] In this step, when the construction sequence is the first construction sequence, by installing the temperature measuring optical fiber of the first target installation length in the first reserved groove, it is achieved to set the reserved optical fiber in the first batch of grooves that need to be backfilled, so that after the trench at the intersection is dug, the reserved optical fiber can be directly passed through the second batch of grooves that need to be backfilled (i.e., the intersection and the side section that has not been backfilled), thereby reducing the melting point caused by fusing the temperature measuring optical fiber at both ends of the intersection.

[0052] It should be understood that when the first target installation length is greater than the initial length of the temperature measuring optical fiber, multiple sections of initial temperature measuring optical fiber need to be used for fusion splicing. The initial length of the temperature measuring optical fiber is the standard length of the initial temperature measuring optical fiber when it leaves the factory.

[0053] Step S502, when the construction sequence is the second construction sequence, use the first groove or the second groove as the second reserved groove; install the temperature measuring optical fiber of the second target installation length in the second reserved groove; the second target installation length is the sum of the length corresponding to the second reserved groove and the length of the third groove; in the target groove, install the temperature measuring optical fiber of the third target installation length in the groove except the second reserved groove; the third target installation length is the length of the groove except the second reserved groove; the target installation length includes the second target installation length and the third target installation length.

[0054] In this step, when the construction sequence is the second construction sequence, by installing the temperature measuring optical fiber of the second target installation length in the second reserved groove, it is achieved that the reserved temperature measuring optical fiber is first set in any groove that needs to be backfilled in the first batch, and then after the trench at the intersection is dug, the reserved temperature measuring optical fiber is directly passed through the second batch of trenches that need to be backfilled (i.e., the intersection and the side section that has not been backfilled), and the grooves at both ends of the intersection are fused, thereby reducing the melting point caused by fusing the temperature measuring optical fibers at both ends of the intersection.

[0055] Exemplarily, the second reserved groove is the first groove or the second groove. When the second reserved groove is the first groove, the second target installation length is the sum of the first length and the third length, and the third target installation length is the second length. When the second reserved groove is the second groove, the second target installation length is the sum of the second length and the third length, and the third target installation length is the first length.

[0056] It should be understood that when the second target installation length and / or the third target installation length is greater than the initial length of the temperature measuring optical fiber, multiple sections of initial temperature measuring optical fiber need to be used for fusion splicing. The initial length of the temperature measuring optical fiber is the standard length of the initial temperature measuring optical fiber when it leaves the factory.

[0057] Step S503, when the construction sequence is the third construction sequence, the temperature measuring optical fiber of the fourth target installation length is arranged in the first groove, the second groove and the third groove in sequence; the fourth target installation length is the sum of the first length, the second length and the third length; the target installation length includes the fourth target installation length.

[0058] In this step, when the construction sequence is the third construction sequence, by sequentially laying out the temperature measuring optical fiber of the fourth target installation length in the first groove, the second groove, and the third groove, it is possible to directly lay the temperature measuring optical fiber to the grooves corresponding to the road sections on both sides of the intersection and the grooves corresponding to the intersection, thereby reducing the melting point caused by fusing the temperature measuring optical fiber at both ends of the intersection.

[0059] It should be understood that when the fourth target installation length is greater than the initial length of the temperature measuring optical fiber, multiple sections of initial temperature measuring optical fiber need to be fusion-spliced. The initial length of the temperature measuring optical fiber is the standard length of the initial temperature measuring optical fiber when it leaves the factory.

[0060] In this embodiment, by setting different target installation lengths of the temperature measuring optical fiber for different construction sequences, the melting point of the temperature measuring optical fiber can be reduced to improve the accuracy of the temperature and leakage point detection by the temperature measuring optical fiber.

[0061] For example, the first groove 10, the second groove 11 and the third groove 12 are excavated as follows: Figure 2 As shown in (b).

[0062] It should be understood that Figure 3 As shown, if it is the road section on both sides of the intersection, the third length is Figure 3 The sum of the first intersection length A and the second intersection length B, the first intersection length is half of the third groove width, and the second intersection length is half of the third groove length.

[0063] Step S600, installing a thermal pipeline in a target trench.

[0064] Optionally, step S600 includes steps S601 to S602, which specifically include: Step S601: The thermal pipeline includes a plurality of sub-pipelines, and each sub-pipeline is welded to connect the sub-pipelines to form a thermal pipeline.

[0065] Step S602, heat-insulating the thermal pipeline.

[0066] In this embodiment, each sub-pipeline is welded to connect the sub-pipelines to form a thermal pipeline, thereby achieving normal operation of the thermal system.

[0067] Specifically, when welding each sub-pipeline, it is necessary to dig a welding pit at the connection of each sub-pipeline to facilitate welding of each sub-pipeline so that the sub-pipelines are connected to form a thermal pipeline.

[0068] Optionally, the thermal insulation treatment of the thermal pipeline includes but is not limited to providing an insulation layer on the outer side wall of the thermal pipeline.

[0069] Specifically, combined Figure 2 As shown, the thermal pipeline 05 includes a water supply pipeline 03 and a water return pipeline 04, and the installation order of the water supply pipeline 03 and the water return pipeline 04 is not limited during installation.

[0070] Step S700: Install the temperature measuring optical fiber of the target installation length on the thermal pipeline.

[0071] Optionally, the target groove includes a plurality of welding pits, and the welding pits correspond to the connection points of the sub-pipes one by one; step S700 includes the following step S701: Step S701, at the welding pit, use a binding wire to fix the temperature measuring optical fiber and the thermal pipeline; the thermal pipeline includes a water supply pipe and a return pipe, and the temperature measuring optical fiber includes a first temperature measuring optical fiber and a second temperature measuring optical fiber, the first temperature measuring optical fiber is located between the groove wall of the target groove and the outer pipe wall of the water supply pipe, and the second temperature measuring optical fiber is located between the groove wall of the target groove and the outer pipe wall of the return pipe.

[0072] In this embodiment, temperature measuring optical fibers are respectively arranged in the water supply and return pipes to detect the temperature and leakage points of the water supply and return pipes.

[0073] Figure 4A schematic diagram of the distance between the temperature measuring optical fiber and the thermal pipeline provided in an embodiment of the present application.

[0074] Optionally, combined Figure 4 As shown, the distance d between the outer wall of the temperature measuring optical fiber 06 and the outer wall of the thermal pipeline 04 is less than or equal to 20 cm.

[0075] In this embodiment, the distance between the outer side wall of the temperature measuring optical fiber and the outer wall of the thermal pipeline is limited to ensure that the temperature measuring optical fiber can detect the temperature change around the thermal pipeline.

[0076] Optionally, before step S700, step S702 is further included, which is specifically as follows: Step S702, manufacturing a temperature measuring optical fiber of a target installation length, wherein the temperature measuring optical fiber is obtained by inserting an optical cable into a silicon core tube.

[0077] In this embodiment, factory-produced optical cables and silicon core tubes are used to make temperature measuring optical fibers, and the silicon core tubes are used as protective tubes for the optical cables to protect the optical cables and reduce the risk of damage to the optical cables by foreign objects during backfilling or by on-site construction machinery. The risk of optical cable breakage caused by land subsidence during long-term operation can also be reduced, thereby extending the service life of the optical cables and reducing the subsequent maintenance costs of the system.

[0078] Optionally, after step S701, step S703 is further included, which is specifically as follows: Step S703, a plurality of water inlet holes are opened on the silicon core tube of the temperature measuring optical fiber; the water inlet holes correspond to the connection points of the sub-pipelines one by one; the water inlet holes are round holes with a diameter of 4 mm to 6 mm.

[0079] In this embodiment, a water inlet hole is provided on the silicon core tube, so that when there is a leak in the thermal pipeline, the leaked water will enter the temperature measuring optical fiber through the water inlet hole of the silicon core tube and contact the optical cable, thereby affecting the propagation of the optical signal in the optical cable, so as to realize the leakage detection of the thermal pipeline according to the abnormal change of the optical signal, and improve the accuracy of the leakage detection of the thermal pipeline.

[0080] Specifically, since the temperature measuring optical fiber is arranged below the thermal pipeline, when the thermal pipeline leaks, the leaked water will flow to the temperature measuring optical fiber and then enter the thermal pipeline.

[0081] For example, since the probability of leakage points appearing at the welding points of the thermal pipeline is relatively high, the water inlet hole can be set at the welding points of the thermal pipeline, that is, at the welding pit, that is, at the connection point of the sub-pipeline.

[0082] Optionally, after step S703 and before step S700, the method further includes step S704: Step S705, a plurality of water outlet holes are opened on the silicon core tube of the temperature measuring optical fiber; the water outlet holes correspond to the water inlet holes one by one.

[0083] In this embodiment, a water outlet hole is provided to facilitate the discharge of water flowing into the silicon core tube, so that when the thermal pipeline is no longer leaking, the water in the silicon core tube is discharged as soon as possible to restore the normal detection of the temperature of the temperature measuring optical fiber.

[0084] Step S800, backfilling the target trench.

[0085] By adopting the construction method of the thermal system provided in the embodiment of the present application, by judging the construction method and whether it involves intersections and other related issues that may cause the temperature measuring optical fiber to form a fusion point, the melting point of the temperature measuring optical fiber can be reduced, the abnormal changes of light in the temperature measuring optical fiber can be reduced, the monitoring quality of the temperature and leakage points of the thermal pipeline by the distributed temperature measurement system can be improved, and the service life of the temperature measuring optical fiber can be extended.

[0086] Optionally, after step S800, the method further includes: using an optical time domain reflectometer (OTDR) to detect the quality of optical cable laying; detecting whether there are steel sheet piles; and removing the steel sheet piles if there are steel sheet piles.

[0087] Figure 5 A schematic diagram of the construction of a thermal system that does not include an intersection is provided in an embodiment of the present application.

[0088] For example, in combination Figure 5 As shown in (a), the preset route 01 in the figure is the route where the thermal pipeline needs to be installed in the embodiment of the present application.

[0089] Optionally, after step S200, steps S201 to S205 are further included, which are specifically as follows: Step S201, when no intersection is included, dig the installation trench 02 according to the preset line.

[0090] In this step, combine Figure 5 As shown in (b), an installation trench 02 is dug on the preset line 01.

[0091] Step S202 , laying the thermal pipe 05 in the installation groove 02 .

[0092] In this step, combine Figure 5 As shown in (c), a thermal pipeline 05 is laid in the installation groove 02. Specifically, the thermal pipeline 05 includes a water supply pipeline 03 and a water return pipeline 04.

[0093] Step S203 , laying the temperature measuring optical fiber 08 in the installation groove 02 .

[0094] In this step, combine Figure 5As shown in (d), a temperature measuring optical fiber 08 is laid in the installation groove 02. Specifically, the temperature measuring optical fiber 08 includes a temperature measuring optical fiber 06 for the water supply pipe and a temperature measuring optical fiber 07 for the water return pipe.

[0095] Step S204, fixing the thermal pipe 05 and the temperature measuring optical fiber 08.

[0096] Specifically, the distance between the outer wall of the thermal pipe 05 and the outer wall of the temperature measuring optical fiber 08 is less than or equal to 20 cm.

[0097] Step S205, backfilling the installation trench 02.

[0098] Optionally, after step S800, steps S900 to S1200 are further included, which are specifically as follows: Step S900: excavating the second batch of trenches that need to be excavated according to the construction sequence.

[0099] Specifically, steps S900 to S1200 need to be executed only when the construction sequence is the first construction sequence and the second construction sequence.

[0100] Step S1000, determining whether it is necessary to fuse the temperature measuring optical fiber.

[0101] Specifically, when the construction sequence is the first construction sequence, it is not necessary to fuse the temperature measuring optical fiber. It is only necessary to extract the temperature measuring optical fiber reserved in the first batch of grooves that need to be backfilled and lay it in the second batch of grooves that need to be backfilled after digging the second batch of grooves that need to be dug, so as to realize the laying of the temperature measuring optical fiber in the first groove, the second groove and the third groove. Exemplarily, the temperature measuring optical fiber of the first target installation length is laid in the first groove, the second groove and the third groove.

[0102] When the construction sequence is the second construction sequence, it is necessary to fuse the temperature measuring optical fibers reserved in the first groove and the second groove. After digging the second batch of grooves that need to be dug, the temperature measuring optical fibers reserved in the first groove and the second groove are fused to realize the arrangement of the temperature measuring optical fibers in the first groove, the second groove, and the third groove. Exemplarily, the temperature measuring optical fibers of the second target installation length and the temperature measuring optical fibers of the third target installation length are arranged in the first groove, the second groove, and the third groove.

[0103] Optionally, after step S1000, the method further includes: using an OTDR to detect the quality of optical cable laying.

[0104] Step S1100, when fusion splicing is required, fusion splicing the temperature measuring optical fiber to connect the temperature measuring optical fiber in the first groove and the temperature measuring optical fiber in the second groove.

[0105] Step S1200, backfilling the second batch of trenches that need to be backfilled.

[0106] In this embodiment, by digging the second batch of trenches that need to be excavated, fusing the temperature measuring optical fibers and backfilling the second batch of trenches that need to be backfilled, the layout of the temperature measuring optical fibers in the first trench, the second trench and the third trench is completed, and the construction of the thermal pipeline system with a leakage detection system is completed, the fusion points of the temperature measuring optical fibers are reduced, and the monitoring quality of the temperature and leakage points of the thermal pipeline by the distributed temperature measurement system is improved.

[0107] Optionally, after step S1200, the method further includes: using an OTDR to detect the quality of optical cable laying; detecting whether there are steel sheet piles; and removing the steel sheet piles if there are steel sheet piles.

[0108] Figure 6 A schematic diagram of the first process of pipe jacking construction provided in an embodiment of the present application.

[0109] Optionally, the target construction method further includes pipe jacking construction, and after step S100, steps S1300 to S1800 are further included, which are specifically as follows: Step S1300, when the target construction method is pipe jacking construction, the pipe jacking is installed on a preset line.

[0110] In this step, the soil ahead is first excavated using specialized tunneling equipment such as a pipe jacking machine or shield machine. The front end of the pipe jacking machine is equipped with a cutterhead or cutting tool that excavates a space in the soil the size of the pipe. The jacking pipe is then gradually pushed into the soil by applying a huge thrust through hydraulic jacks. The hydraulic jacks provide a strong push from the back while the tunnel boring machine at the front continues to dig. The cutterhead at the front of the tunnel boring machine will move the excavated soil to the back of the pipe, and the soil is usually transported away by mud or conveyor belts to avoid blockages. The jacking pipe usually consists of multiple sections of pipe, which are connected together. After each advance, a new section of pipe is pushed into the previous section.

[0111] For example, in combination Figure 6 As shown in (a), the top pipe 16 is installed on the preset line 01.

[0112] Step S1400, setting cement nails at preset fixing points on the inner pipe wall of the jacking pipe.

[0113] Step S1500, using cement nails to fix the connection with the alternative temperature measuring optical fiber; the alternative temperature measuring optical fiber includes a silicon core tube and an alternative optical cable.

[0114] In this step, since there is sufficient installation space inside the jacking pipe, workers are arranged to enter the jacking pipe to fix cement nails, and use the cement nails to fix the alternative temperature measuring optical fiber to achieve the installation of the alternative temperature measuring optical fiber.

[0115] Specifically, cement nails are used to fix the connection with the alternative temperature measuring optical fiber, and iron wires are used to fix the cement nails and the alternative temperature measuring optical fiber. For example, in combination Figure 6 As shown in (b), the temperature measuring optical fiber 08 is installed on the upper part of the inner wall of the top pipe 16. Figure 6 As shown in (d), when the temperature measuring optical fiber 08 includes the first temperature measuring optical fiber 06 and the second temperature measuring optical fiber 07, and the thermal pipeline 05 includes the water supply pipeline 03 and the return water pipeline 04, the first temperature measuring optical fiber 06 is used to measure the temperature of the water supply pipeline 03, and the second temperature measuring optical fiber 07 is used to measure the temperature of the return water pipeline 04. In this case, the first temperature measuring optical fiber 06 and the second temperature measuring optical fiber 07 can be respectively placed above the water supply pipeline 03 and the return water pipeline 04 to achieve separate detection.

[0116] Step S1600, installing a thermal pipeline in the top pipe.

[0117] In this step, the thermal pipeline is pushed into the top pipe.

[0118] For example, in combination Figure 6 As shown in (c) and (e), the thermal pipe 05 is installed in the top pipe 16.

[0119] Step S1700, using an optical cable to replace a substitute optical cable.

[0120] In this step, by first using a substitute optical cable for pre-installation, damage to the optical cable during the installation of the thermal pipeline is reduced. When the thermal pipeline is installed, the optical cable is used to replace the substitute optical cable to complete the installation of the real optical cable. Subsequent installation steps will not cause damage to the optical cable that is actually needed, thereby extending the service life of the optical cable and reducing the later maintenance costs of the system.

[0121] Step S1800, backfilling the jacking pipe with sand.

[0122] In this embodiment, pipe jacking construction is used to facilitate laying of thermal pipes in environments that are not suitable for trench construction. This eliminates the need to dig trenches for construction, reduces the complexity of construction caused by trench digging, and is suitable for environments that are not suitable for trench construction.

[0123] Optionally, after step S1800, the method further includes: using an OTDR to detect the quality of optical cable laying; detecting whether there are steel sheet piles; and removing the steel sheet piles if there are steel sheet piles.

[0124] Specifically, during pipe jacking construction, if a thermal pipe leaks, the leaked water will flow into the pipe jacking, thereby affecting the temperature inside the pipe jacking, and then the leakage of the thermal pipe will be detected by the temperature measuring optical fiber.

[0125] Figure 7A schematic diagram of the second process of pipe jacking construction provided in an embodiment of the present application.

[0126] Optionally, the target construction method further includes pipe jacking construction, and after step S100, steps S1900 to S2200 are further included, which are specifically as follows: Step S1900, when the target construction method is pipe jacking construction, the pipe jacking is installed on a preset line.

[0127] Specifically, the implementation method of step S1900 refers to the above-mentioned step S1300, and this application will not repeat it again.

[0128] For example, in combination Figure 7 As shown in (a), the top pipe 16 is installed on the preset line 01.

[0129] Step S2000, installing a thermal pipeline in the top pipe.

[0130] Specifically, the implementation method of step S2000 refers to the above-mentioned step S1600, and this application will not repeat it again.

[0131] For example, in combination Figure 7 As shown in (b), the thermal pipeline 05 is installed in the top pipe 16. Exemplarily, the thermal pipeline 05 includes a water supply pipeline 06 and a water return pipeline 07. In this case, the water supply pipeline 03 and the water return pipeline 04 are installed in the top pipe 16.

[0132] Step S2100: Use a trolley to pass the temperature measuring optical fiber through the top pipe and install the temperature measuring optical fiber.

[0133] Specifically, due to the thermal pipeline installed in the top pipe first, there is no remaining space for workers to pass the temperature measuring optical fiber, so it is necessary to use a trolley to carry the temperature measuring optical fiber through the top pipe to achieve the installation of the temperature measuring optical fiber.

[0134] For example, in combination Figure 7 As shown in (c), the temperature measuring optical fiber 08 is installed in the top pipe 16. Specifically, Figure 7 As shown in (d), when the temperature measuring optical fiber 08 includes a first temperature measuring optical fiber 06 and a second temperature measuring optical fiber 07, the first temperature measuring optical fiber 06 is used to measure the temperature of the water supply pipe 03, and the second temperature measuring optical fiber 07 is used to measure the temperature of the return water pipe 04. In this case, the first temperature measuring optical fiber 06 and the second temperature measuring optical fiber 07 can be respectively placed above the water supply pipe 03 and the return water pipe 04 to achieve separate detection.

[0135] Figure 8 A schematic diagram of the operation of the scooter provided in an embodiment of the present application.

[0136] For example, in combination Figure 8As shown, the sliding vehicle 17 can be controlled to move along the thermal pipe 05, and slide in the space between the thermal pipe 05 and the upper pipe wall of the top pipe 16, thereby driving the temperature measuring optical fiber to pass through the top pipe 16. When the temperature measuring optical fiber 08 passes through the top pipe 16, sand is blown into the top pipe 16 to fill the remaining space in the top pipe 16, so as to achieve the fixation between the thermal pipe 05 and the temperature measuring optical fiber 08 in the top pipe 16.

[0137] Step S2200, backfilling the jacking pipe using a sand blowing process.

[0138] In this step, backfilling the top pipe using the sand blowing process includes: preparing a sand blowing device; the sand blowing device includes a compressed air source, a delivery pipe, and a nozzle. Selecting backfill sand. Connecting the delivery pipe to the sand blowing device, and aiming the nozzle at the backfill area around the top pipe. Starting the compressed air from the compressed air source to blow the sand into the area around the top pipe through the delivery pipe at a preset blowing speed.

[0139] In this embodiment, a sliding vehicle is designed to achieve fixed installation of the temperature measuring optical fiber and the top pipe, so as to realize the measurement of the temperature and leakage point of the thermal pipeline by using a distributed optical fiber temperature measurement system.

[0140] Optionally, after step S2200, the method further includes: using an OTDR to detect the quality of optical cable laying; detecting whether there are steel sheet piles; and removing the steel sheet piles if there are steel sheet piles.

[0141] Corresponding to the above-mentioned embodiments of the construction method of the thermal system, the present application also provides an embodiment of a system of thermal pipelines with a leak detection system. The system of thermal pipelines with a leak detection system is obtained by using any of the above-mentioned construction methods of the thermal system, and comprises: a thermal pipeline and a temperature measuring optical fiber, the thermal pipeline is buried underground; the temperature measuring optical fiber is fixedly installed with the thermal pipeline; the thermal pipeline is configured for urban heating; and the temperature measuring optical fiber is configured to measure the temperature measurement point of the thermal pipeline.

[0142] The system of thermal pipes with a leak detection system provided by the embodiment of the present application reduces the fusion points of the temperature measuring optical fiber, reduces the problem of optical signal abnormalities in the temperature measuring optical fiber due to the fusion points, and improves the detection accuracy of the temperature measuring optical fiber on the thermal pipe.

[0143] It should be noted that those skilled in the art will easily think of other embodiments of the present application after considering the specification and practicing the application disclosed herein. The present application is intended to cover any modification, use or adaptation of the present application, which follows the general principles of the present application and includes common knowledge or customary technical means in the art that are not disclosed in the present application. The specification and examples are only regarded as exemplary, and the true scope of the present application is indicated by the claims.

[0144] It should be understood that the present application is not limited to the precise structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present application is limited only by the appended claims.

Claims

1. A construction method for a thermal system, It is characterized in that The thermal system includes a leak detection system and a thermal pipeline, the leak detection system includes a temperature measuring optical fiber, the installation position of the thermal pipeline is a preset line, and the construction method of the thermal system includes: Determining a target construction method based on the environmental information of the preset route; When the target construction method is trench construction, determining whether the preset route includes an intersection; In the case of including the intersection, determining the construction sequence of the intersection and other sections on the preset route; the sections are connected through the intersection; According to the construction sequence, excavating a target trench on the preset route; the target trench is a trench that needs to be excavated in the first batch in the construction sequence; Based on the construction sequence and the length of the target groove, determining the target installation length of the temperature measuring optical fiber in the reserved groove; the temperature measuring optical fiber is used to measure the leakage point of the thermal pipeline; the target groove includes the reserved groove; installing the thermal pipeline in the target trench; Installing the temperature measuring optical fiber of the target installation length on the thermal pipeline; The target trench is backfilled.

2. The construction method of the thermal system according to claim 1, It is characterized in that The preset route includes the intersection, a first section and a second section, the other sections include the first section and the second section, and the first section and the second section are connected through the intersection; The groove corresponding to the first road section is a first groove, the groove corresponding to the second road section is a second groove, and the groove corresponding to the intersection is a third groove; the construction sequence includes a first construction sequence, a second construction sequence and a third construction sequence; The first construction sequence includes: the first batch of trenches to be excavated are the first trench and the second trench, the first batch of trenches to be backfilled are the first trench or the second trench, the second batch of trenches to be excavated are the third trench, and the second batch of trenches to be backfilled are the third trench and trenches other than the trenches to be backfilled in the first batch; The second construction sequence includes: the first batch of trenches to be excavated are the first trench and the second trench, the first batch of trenches to be backfilled are the first trench and the second trench, the second batch of trenches to be excavated are the third trench, and the second batch of trenches to be backfilled are the third trench; The third construction sequence includes: the first batch of trenches to be excavated are the first trench, the second trench and the third trench, and the first batch of trenches to be backfilled are the first trench, the second trench and the third trench.

3. The construction method of the thermal system according to claim 2, It is characterized in that The length of the first groove is a first length, the length of the second groove is a second length, and the length of the third groove is a third length; the reserved groove includes a first reserved groove or a second reserved groove; The step of determining a target installation length of the temperature measuring optical fiber in the reserved groove based on the construction sequence and the length of the target groove comprises: When the construction sequence is the first construction sequence, the first batch of grooves to be backfilled are used as the first reserved grooves; the temperature measuring optical fiber of the first target installation length is installed in the first reserved groove; the first target installation length is the sum of the first length and the third length; the target installation length includes the first target installation length; When the construction sequence is the second construction sequence, the first groove or the second groove is used as the second reserved groove; the temperature measuring optical fiber of the second target installation length is installed in the second reserved groove; the second target installation length is the sum of the length corresponding to the second reserved groove and the length of the third groove; in the target groove, the temperature measuring optical fiber of the third target installation length is installed in the groove other than the second reserved groove; the third target installation length is the length of the groove other than the second reserved groove; the target installation length includes the second target installation length and the third target installation length; When the construction sequence is the third construction sequence, the temperature measuring optical fiber of the fourth target installation length is arranged in the first groove, the second groove and the third groove in sequence; the fourth target installation length is the sum of the first length, the second length and the third length; the target installation length includes the fourth target installation length.

4. The construction method of the thermal system according to claim 1, It is characterized in that The step of installing the thermal pipeline in the target groove comprises: The thermal pipeline comprises a plurality of sub-pipelines, and each of the sub-pipelines is welded to connect the sub-pipelines to form the thermal pipeline; The thermal pipeline is subjected to thermal insulation treatment.

5. The construction method of the thermal system according to claim 4, It is characterized in that The target groove includes a plurality of welding pits, and the welding pits correspond to the connection points of the sub-pipes one by one; the temperature measuring optical fiber having the target installation length is installed on the thermal pipeline, comprising: At the welding pit, the temperature measuring optical fiber and the thermal pipeline are fixed with a binding wire; the thermal pipeline includes a water supply pipe and a return water pipe, and the temperature measuring optical fiber includes a first temperature measuring optical fiber and a second temperature measuring optical fiber, the first temperature measuring optical fiber is located between the groove wall of the target groove and the outer pipe wall of the water supply pipe, and the second temperature measuring optical fiber is located between the groove wall of the target groove and the outer pipe wall of the return water pipe.

6. The construction method of the thermal system according to claim 5, It is characterized in that The distance between the outer side wall of the temperature measuring optical fiber and the outer tube wall of the thermal pipeline is less than or equal to 20 cm.

7. The construction method of the thermal system according to claim 5, It is characterized in that Before installing the temperature measuring optical fiber of the target installation length on the thermal pipeline, the method further includes: Manufacturing the temperature measuring optical fiber of the target installation length, wherein the temperature measuring optical fiber is obtained by inserting an optical cable into a silicon core tube; and / or, After the temperature measuring optical fiber and the thermal pipeline are fixed by binding wire, the method further comprises: A plurality of water inlet holes are provided on the silicon core tube of the temperature measuring optical fiber; the water inlet holes correspond one to one with the connection points of the sub-pipelines; the water inlet holes are circular holes with a diameter of 4 mm to 6 mm.

8. The construction method of the thermal system according to claim 2, It is characterized in that After backfilling the target trench, the method further includes: Digging the second batch of trenches to be dug according to the construction sequence; Determining whether it is necessary to fuse the temperature measuring optical fiber; When fusion splicing is required, fusion splicing the temperature measuring optical fiber to connect the temperature measuring optical fiber in the first groove and the temperature measuring optical fiber in the second groove; Backfill the second batch of trenches that need to be backfilled.

9. The construction method of a thermal system according to any one of claims 1 to 8, It is characterized in that The target construction method also includes pipe jacking construction; After determining the target construction method based on the environmental information of the preset line, the method further includes: When the target construction method is the pipe jacking construction, installing the pipe jacking on the preset line; A cement nail is arranged at a preset fixing point of the inner pipe wall of the jacking pipe; Using cement nails to fix the connection with the alternative temperature measuring optical fiber; the alternative temperature measuring optical fiber includes a silicon core tube and an alternative optical cable; installing the thermal pipeline in the top pipe; replacing the replacement optical cable with the optical cable; backfilling the jacking pipe with sand; or, After determining the target construction method based on the environmental information of the preset line, the method further includes: When the target construction method is the pipe jacking construction, installing the pipe jacking on the preset line; installing the thermal pipeline in the top pipe; Use a trolley to pass the temperature measuring optical fiber through the top pipe to install the temperature measuring optical fiber; The jacking pipe is backfilled using a sand blowing process.

10. A thermal system, obtained by using the thermal system construction method according to any one of claims 1 to 9, It is characterized in that include: A thermal pipeline and a leak detection system, wherein the thermal pipeline is buried underground; the thermal pipeline is configured for urban heating; The leakage detection system comprises a temperature measuring optical fiber, which is fixedly installed on the thermal pipeline; the temperature measuring optical fiber is configured to measure a temperature measuring point of the thermal pipeline.

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