Dynamic leakage alarming and tracing method for buried heat supply pipeline

Abstract

The invention discloses a dynamic leakage alarming and tracing method for a buried heat supply pipeline, relates to the technical field of heat supply pipeline detection, and solves the technical problems of low accuracy of alarming and tracing of the heat supply pipeline and high false alarm rate in the prior art. According to the invention, the corresponding dynamic alarm threshold value is calculated based on the historical temperature data corresponding to the target device and each comparison device; calculating a corresponding real-time temperature difference based on the real-time temperature data of the target equipment and the real-time temperature data of the comparison equipment; calculating a leakage radius based on pipeline design parameters; and tracing the heat supply pipeline based on the position of the alarm device and the corresponding leakage radius to obtain a tracing result. According to the invention, the real-time temperature difference between the target device and the plurality of comparison devices is compared with the corresponding dynamic threshold value, so that the influence of the ambient temperature fluctuation and the temperature detection device fault on the heat supply pipeline alarm can be reduced, and the accuracy of the heat supply pipeline leakage alarm can be improved.

Description

Technical Field

[0001] The invention belongs to the technical field of heating pipeline detection, and in particular is a leakage dynamic alarm and source tracing method for buried heating pipelines. Background Art

[0002] Leakage of buried heating pipelines due to aging, corrosion, bending and deformation will reduce the efficiency of heat pipe network transmission, cause energy waste and economic losses, threaten the living environment of residents, and even cause major safety accidents such as casualties and road collapse. Therefore, leakage alarm and source tracing of heating pipelines have become a technical problem that needs to be solved urgently.

[0003] In the current heating pipeline monitoring technology based on soil temperature, a fixed threshold or manually adjusted threshold is generally used to realize the alarm function. The disadvantages of this alarm method are obvious: first, the soil temperature will fluctuate violently with the atmospheric temperature, solar radiation and weather conditions. A low fixed threshold setting may lead to a large number of false alarms and misreports, while a high setting may cause alarm delays or missed alarms. Second, the inaccurate measurements caused by the differences and drift of a large number of temperature sensors themselves will also cause missed alarms and false alarms. Third, the fixed threshold cannot adapt to the huge differences in soil temperature caused by the climate and environmental conditions in different regions.

[0004] The present invention proposes a dynamic leakage alarm and source tracing method for buried heating pipelines to solve the above technical problems. Summary of the invention

[0005] The present invention aims to solve at least one of the technical problems existing in the prior art; to this end, the present invention proposes a dynamic leakage alarm and tracing method for buried heating pipelines, which is used to solve the technical problem that the alarm and tracing methods for heating pipelines in the prior art are affected by the ambient temperature, resulting in low accuracy of alarm and tracing of the heating pipelines and a high false alarm rate.

[0006] To achieve the above-mentioned object, a first aspect of the present invention provides a dynamic alarm method for leakage of an underground heating pipeline, comprising:

[0007] S1: Marking a number of temperature detection devices within a set range of the target device as comparison devices; wherein the comparison devices include a number of temperature detection devices;

[0008] S2: Obtaining the real-time temperature data corresponding to the target device and each comparison device and the historical temperature data of several consecutive periods;

[0009] S3: Calculate the corresponding dynamic alarm threshold based on the historical temperature data corresponding to the target device and each comparison device;

[0010] S4: Calculating the corresponding real-time temperature difference based on the real-time temperature data of the target device and each comparison device;

[0011] S5: Based on the comparison between the real-time temperature difference and the dynamic alarm threshold, the corresponding device alarm information is obtained; wherein the device alarm information includes the maximum temperature of the alarm device, the average temperature of the comparison device, the device number and the device location; the alarm device includes the target device and the comparison device.

[0012] Preferably, the step of marking a plurality of temperature detection devices within a set range of the target device as comparison devices includes:

[0013] Several temperature detection devices within the set range of the target device and located on the same heating pipe as the target device are marked as comparison devices, and the target device is marked as A, and the comparison device is marked as j; wherein j = 1, 2, ..., m, m is the total number of comparison devices and m ≧ 3.

[0014] Preferably, the calculation of the corresponding dynamic alarm threshold based on the historical temperature data corresponding to the target device and each comparison device includes:

[0015] A1: Extract the historical temperature data corresponding to the target device and each comparison device;

[0016] A2: Calculate the historical temperature difference average and historical temperature standard deviation based on the historical temperature data of the target device and each comparison device;

[0017] A3: By formula Calculate the dynamic alarm threshold ΔT of the target device A and the comparison device j Aj,th ;in, is the average historical temperature difference between target device A and comparison device j, is the historical temperature standard deviation between target device A and comparison device j, X is the alarm classification parameter, and X is greater than 0.

[0018] The present invention calculates the historical temperature difference average value and the historical temperature standard deviation based on the historical temperature data of the target device and each comparison device, and then calculates the corresponding dynamic alarm threshold based on the historical temperature difference average value and the historical temperature standard deviation between the target device and the comparison device. This can effectively reduce the impact of ambient temperature fluctuations, thereby helping to reduce the false alarm rate of alarming for leaking heating pipes.

[0019] Preferably, the calculating the historical temperature difference average value and the historical temperature standard deviation based on the historical temperature data of the target device and each comparison device includes:

[0020] B1: Extract historical temperature data of several consecutive periods;

[0021] B2: By formula Calculate the historical temperature average of target device A

[0022] B3: By formula Calculate the historical temperature average of the comparison device j

[0023] B4: By formula Calculate the average historical temperature difference between target device A and comparison device j

[0024] B5: By formula Calculate the historical temperature standard deviation of target device A and comparison device j

[0025] Among them, T A,i represents the temperature data of target device A at the i-th moment, T j,i Indicates the temperature data of device j at the i-th moment, ΔT Aj,i represents the temperature difference between the target device A and the comparison device j at the i-th moment; i=1, 2, ..., n, where n is the total number of samples of historical temperature data.

[0026] Preferably, the calculating of the corresponding real-time temperature difference based on the real-time temperature data of the target device and each comparison device includes:

[0027] Extract the real-time temperature data of the target device and each comparison device;

[0028] By the formula ΔT Aj =|T A -T j | Calculate the real-time temperature difference ΔT between target device A and comparison device j Aj ; Among them, T A is the real-time temperature data of the target device, T j For comparison, the real-time temperature data of device j.

[0029] Preferably, the comparison between the real-time temperature difference and the dynamic alarm threshold to obtain the device alarm information includes:

[0030] C1: Extract the real-time temperature difference ΔT between the target device and each comparison device Aj and dynamic alarm threshold ΔT Aj,th ;

[0031] C2: randomly select two comparison devices from the comparison devices and mark them as the first comparison device and the second comparison device respectively;

[0032] C3: Determine the real-time temperature difference ΔT Aj Is the number of devices less than the corresponding dynamic alarm threshold equal to 2? If yes, jump to C1; if no, jump to C4;

[0033] C4: Determine the real-time temperature difference ΔT Aj Is the number of devices greater than the corresponding dynamic alarm threshold equal to 2? If yes, then output device alarm information and jump to C1; if no, then jump to C5;

[0034] C5: Select one comparison device from the remaining comparison devices and mark it as the third device;

[0035] C6: Determine whether the real-time temperature difference between the target device and the third device is greater than the corresponding dynamic alarm threshold; if yes, output the device alarm information; if not, mark the comparison device whose real-time temperature difference exceeds the corresponding alarm threshold as a faulty device, remove the faulty device from the comparison device, and jump to C1.

[0036] It should be noted that the above threshold analysis and alarm judgment are performed on all devices, and the alarm information is output to the alarm device, which is divided into single-device alarm situation and multi-device alarm situation.

[0037] The present invention can reduce the impact of temperature detection device failure on heating pipeline alarm by comparing the real-time temperature difference between a target device and multiple comparison devices with the corresponding dynamic threshold, which is beneficial to improving the accuracy of heating pipeline leakage alarm.

[0038] A second aspect of the present invention provides a method for dynamically tracing leakage of an underground heating pipeline, comprising:

[0039] T1: Retrieve the heating pipeline to be detected within the set distance range from the alarm device and obtain the pipeline design parameters; the pipeline design parameters include pipe diameter, buried depth, heating medium and heating temperature;

[0040] T2: Construct a mathematical model of soil temperature field based on pipeline design parameters;

[0041] T3: Solve the mathematical model of soil temperature field to obtain the tracing formula;

[0042] T4: The leakage radius is calculated according to the tracing formula;

[0043] T5: Based on the location of the alarm device and the corresponding leakage radius, the heating pipeline is traced to obtain the traceability result; the traceability result includes the traceability information and the leakage type. The traceability information includes the potential leakage pipeline and the leakage-prone parts. The leakage types include single point and multiple points.

[0044] Preferably, the soil temperature field mathematical model is constructed based on the pipeline design parameters, including:

[0045] E1: Extract pipeline design parameters;

[0046] E2: Calculate the radius R0 of the leakage high temperature area by the formula R0 = 1.75D;

[0047] E3: Calculate the temperature boundary radius R1 by the formula R1=2L+2.1D;

[0048] E4: By formula The mathematical model of soil temperature field is calculated; among them, D is the pipe diameter, L is the burial depth, T0 is the heating temperature, T2 is the average temperature of all comparison devices after the equipment alarm, and R is the distance from the leakage source.

[0049] Preferably, the tracing formula obtained by solving the soil temperature field mathematical model includes:

[0050] By solving the mathematical model of soil temperature field, the tracing formula is obtained Among them, T1 is the highest temperature of the alarm equipment.

[0051] Preferably, the tracing of the heating pipeline based on the location of the alarm device and the corresponding leakage radius includes:

[0052] Z1: Extract the location of alarm device k and the corresponding leakage radius; where k = 1, 2, ..., v, v is the total number of alarm devices;

[0053] Z2: With the location of alarm device k as the center, v circular areas are formed in combination with the corresponding leakage radius;

[0054] Z3: Determine whether the v circular areas intersect with the same heating pipe; if yes, mark the leakage type as single point, and mark the corresponding heating pipe as a potential leakage pipe; if no, mark the leakage type as multiple points, and mark the corresponding multiple heating pipes that intersect with the v circular areas as potential leakage pipes;

[0055] Z4: Retrieve the connection locations on the potential leaking pipeline and mark them as leak-prone areas; the connection locations include tees, flanges, reducers and welded joints.

[0056] The present invention traces the source of a heating pipe through the position of an alarm device and a corresponding leakage radius, forms a circular area with the position of the alarm device as the center and in combination with the leakage radius, marks the heating pipes in the circular area as potential leakage pipes, retrieves the connection positions on the potential leakage pipes and marks them as leak-prone parts; the leaking heating pipes can be marked quickly and accurately, which is beneficial to improving the accuracy of tracing the source of the leaking heating pipes, and is beneficial to improving the efficiency of tracing the source of the leaking heating pipes.

[0057] Compared with the prior art, the present invention has the following beneficial effects:

[0058] 1. The present invention calculates the historical temperature difference average value and the historical temperature standard deviation according to the historical temperature data of the target device and each comparison device, and then calculates the corresponding dynamic alarm threshold according to the historical temperature difference average value and the historical temperature standard deviation between the target device and the comparison device, which can effectively reduce the impact of ambient temperature fluctuations, thereby helping to reduce the false alarm rate of alarming for leaking heating pipes.

[0059] 2. The present invention can reduce the impact of temperature detection device failure on heating pipeline alarm by comparing the real-time temperature difference between the target device and multiple comparison devices with the corresponding dynamic threshold, which is beneficial to improving the accuracy of heating pipeline leakage alarm.

[0060] 3. The present invention traces the source of the heating pipe through the position of the alarm device and the corresponding leakage radius, forms a circular area with the position of the alarm device as the center and the leakage radius, marks the heating pipe in the circular area as a potential leakage pipe, retrieves the connection position on the potential leakage pipe and marks it as a leakage-prone part; the leaking heating pipe can be marked quickly and accurately, which is beneficial to improving the accuracy of tracing the leaking heating pipe, and is beneficial to improving the efficiency of tracing the leaking heating pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0061] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0062] Figure 1 It is an overall flow chart of the leakage alarm and source tracing method of the buried heating pipeline of the present invention;

[0063] Figure 2 A flow chart of comparing the real-time temperature difference with the dynamic alarm threshold in the present invention;

[0064] Figure 3 It is a schematic diagram of the principle of leak alarm and source tracing for buried heating pipelines in the present invention. DETAILED DESCRIPTION

[0065] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0066] See also Figure 1-Figure 3 The first embodiment of the present invention provides a method for dynamic alarming of leakage of underground heating pipelines, comprising:

[0067] S1: Marking a number of temperature detection devices within a set range of the target device as comparison devices; wherein the comparison devices include a number of temperature detection devices;

[0068] S2: Obtaining the real-time temperature data corresponding to the target device and each comparison device and the historical temperature data of several consecutive periods;

[0069] S3: Calculate the corresponding dynamic alarm threshold based on the historical temperature data corresponding to the target device and each comparison device;

[0070] S4: Calculating the corresponding real-time temperature difference based on the real-time temperature data of the target device and each comparison device;

[0071] S5: Based on the comparison between the real-time temperature difference and the dynamic alarm threshold, the corresponding device alarm information is obtained; wherein the device alarm information includes the maximum temperature of the alarm device, the average temperature of the comparison device, the device number and the device location; the alarm device includes the target device and the comparison device.

[0072] In this embodiment, several temperature detection devices within the set range of the target device are marked as comparison devices, including:

[0073] Several temperature detection devices within the set range of the target device and located on the same heating pipe as the target device are marked as comparison devices, and the target device is marked as A, and the comparison device is marked as j; wherein j = 1, 2, ..., m, m is the total number of comparison devices and m ≧ 3.

[0074] Exemplarily, three temperature detection devices within the set range of the target device and located on the same heating pipeline as the target device are marked as comparison devices, and the target device is marked as A, and the comparison devices are marked as 1, 2, and 3 respectively.

[0075] In this embodiment, the corresponding dynamic alarm threshold is calculated based on the historical temperature data corresponding to the target device and each comparison device, including:

[0076] A1: Extract the historical temperature data corresponding to the target device and each comparison device;

[0077] A2: Calculate the historical temperature difference average and historical temperature standard deviation based on the historical temperature data of the target device and each comparison device;

[0078] A3: By formula Calculate the dynamic alarm threshold ΔT of the target device A and the comparison device j Aj,th ;in, is the average historical temperature difference between target device A and comparison device j, is the historical temperature standard deviation between target device A and comparison device j, X is the alarm classification parameter, and X is greater than 0.

[0079] For example, the alarm classification parameter X is set to 5. The dynamic alarm thresholds of target device A and comparison device j are calculated by the formula: ΔT A1,th =3.2℃, ΔT A2,th =5.35℃, ΔT A3,th =3.4℃.

[0080] The present invention calculates the historical temperature difference average value and the historical temperature standard deviation based on the historical temperature data of the target device and each comparison device, and then calculates the corresponding dynamic alarm threshold based on the historical temperature difference average value and the historical temperature standard deviation between the target device and the comparison device. This can effectively reduce the impact of ambient temperature fluctuations, thereby helping to reduce the false alarm rate of alarming for leaking heating pipes.

[0081] In this embodiment, the historical temperature difference average value and the historical temperature standard deviation are calculated based on the historical temperature data of the target device and each comparison device, including:

[0082] B1: Extract historical temperature data of several consecutive periods;

[0083] B2: By formula Calculate the historical temperature average of target device A

[0084] B3: By formula Calculate the historical temperature average of the comparison device j

[0085] B4: By formula Calculate the average historical temperature difference between target device A and comparison device j

[0086] B5: By formula Calculate the historical temperature standard deviation of target device A and comparison device j

[0087] Among them, T A,i represents the temperature data of target device A at the i-th moment, T j,i Indicates the temperature data of device j at the i-th moment, ΔT Aj,i represents the temperature difference between the target device A and the comparison device j at the i-th moment; i=1, 2, ..., n, where n is the total number of samples of historical temperature data.

[0088] Exemplarily, the historical temperature data corresponding to the target device and each comparison device are extracted as shown in the following table:

[0089]

[0090]

[0091] Calculated by the formula:

[0092] Historical temperature averages:

[0093] Historical average temperature difference:

[0094] Historical temperature standard deviation:

[0095] In this embodiment, the corresponding real-time temperature difference is calculated based on the real-time temperature data of the target device and each comparison device, including:

[0096] Extract the real-time temperature data of the target device and each comparison device;

[0097] By the formula ΔT Aj =|T A -T j | Calculate the real-time temperature difference ΔT between target device A and comparison device j Aj ; Among them, T A is the real-time temperature data of the target device, T j For comparison, the real-time temperature data of device j.

[0098] Exemplarily, the extracted real-time temperature data of the target device and each comparison device are shown in the following table:

[0099]

[0100] The real-time temperature difference between target device A and comparison device j is calculated by the formula: ΔT A1 =22.9℃, ΔT A2 =24.2℃, ΔT A3 =22.7℃.

[0101] In this embodiment, based on the comparison between the real-time temperature difference and the dynamic alarm threshold, the device alarm information is obtained, including:

[0102] C1: Extract the real-time temperature difference ΔT between the target device and each comparison device Aj and dynamic alarm threshold ΔT Aj,th ;

[0103] C2: randomly select two comparison devices from the comparison devices and mark them as the first comparison device and the second comparison device respectively;

[0104] C3: Determine the real-time temperature difference ΔT Aj Is the number of devices less than the corresponding dynamic alarm threshold equal to 2? If yes, jump to C1; if no, jump to C4;

[0105] C4: Determine the real-time temperature difference ΔT Aj Is the number of devices greater than the corresponding dynamic alarm threshold equal to 2? If yes, then output device alarm information and jump to C1; if no, then jump to C5;

[0106] C5: Select one comparison device from the remaining comparison devices and mark it as the third device;

[0107] C6: Determine whether the real-time temperature difference between the target device and the third device is greater than the corresponding dynamic alarm threshold; if yes, output the device alarm information; if not, mark the comparison device whose real-time temperature difference exceeds the corresponding alarm threshold as a faulty device, remove the faulty device from the comparison device, and jump to C1.

[0108] It should be noted that the above threshold analysis and alarm judgment are performed on all devices, and the alarm information is output to the alarm device, which is divided into single-device alarm situation and multi-device alarm situation.

[0109] Exemplarily, the real-time temperature difference between the target device and each comparison device is extracted as ΔT A1 =22.9℃, ΔT A2 =24.2℃, ΔT A3 =22.7℃, the corresponding dynamic alarm thresholds are ΔT A1,th =3.2℃, ΔT A2,th =5.35℃, ΔT A3,th =3.4℃;

[0110] Selecting a comparison device 1 and a comparison device 2 from the comparison devices and marking them as a first comparison device and a second comparison device respectively;

[0111] Due to the real-time temperature difference ΔT of the first comparison device A1 =22.9℃ and the real-time temperature difference ΔT of the second comparison device A2 =24.2℃ are both greater than the corresponding dynamic alarm threshold ΔT A1,th =3.2℃, ΔT A2,th =5.35℃, so the number of devices that meet the corresponding dynamic alarm threshold is equal to 2; output device alarm information; jump to C1.

[0112] The present invention can reduce the impact of temperature detection device failure on heating pipeline alarm by comparing the real-time temperature difference between a target device and multiple comparison devices with the corresponding dynamic threshold, which is beneficial to improving the accuracy of heating pipeline leakage alarm.

[0113] The second aspect of the present invention provides a method for dynamically tracing leakage of an underground heating pipeline, comprising:

[0114] T1: Retrieve the heating pipeline to be detected within the set distance range from the alarm device and obtain the pipeline design parameters; the pipeline design parameters include pipe diameter, buried depth, heating medium and heating temperature;

[0115] T2: Construct a mathematical model of soil temperature field based on pipeline design parameters;

[0116] T3: Solve the mathematical model of soil temperature field to obtain the tracing formula;

[0117] T4: The leakage radius is calculated according to the tracing formula;

[0118] T5: Based on the location of the alarm device and the corresponding leakage radius, the heating pipeline is traced to obtain the traceability result; the traceability result includes the traceability information and the leakage type. The traceability information includes the potential leakage pipeline and the leakage-prone parts. The leakage types include single point and multiple points.

[0119] In this embodiment, a soil temperature field mathematical model is constructed based on pipeline design parameters, including:

[0120] E1: Extract pipeline design parameters;

[0121] E2: Calculate the radius R0 of the leakage high temperature area by the formula R0 = 1.75D;

[0122] E3: Calculate the temperature boundary radius R1 by the formula R1=2L+2.1D;

[0123] E4: By formula The mathematical model of soil temperature field is calculated; among them, D is the pipe diameter, L is the burial depth, T0 is the heating temperature, T2 is the average temperature of all comparison devices after the equipment alarm, and R is the distance from the leakage source.

[0124] Exemplarily, the extracted pipeline design parameters are shown in the following table:

[0125] Pipe diameter D(m) Buried depth L(m) Heating medium Heating temperature T0(℃) 0.8 1.5 Hot water 100

[0126] Set the average temperature of all comparison devices T2 = 17.5℃;

[0127] The radius of the leakage high temperature area is calculated by the formula R0 = 1.4m;

[0128] The temperature boundary radius R1 = 4.68m is calculated by the formula;

[0129] The mathematical model of soil temperature field is obtained by formula calculation

[0130] In this embodiment, the tracing formula is obtained based on the soil temperature field mathematical model, including:

[0131] By solving the mathematical model of soil temperature field, the tracing formula is obtained Among them, T1 is the highest temperature of the alarm equipment.

[0132] Exemplarily, the maximum temperature of the alarm device is set to T1 = 40.8° C.; the tracing formula is solved to obtain the leakage radius R(T1) = 2.58 m.

[0133] In this embodiment, tracing the source of the heating pipeline based on the location of the alarm device and the corresponding leakage radius includes:

[0134] Z1: Extract the location of alarm device k and the corresponding leakage radius; where k = 1, 2, ..., v, v is the total number of alarm devices;

[0135] Z2: With the location of alarm device k as the center, v circular areas are formed in combination with the corresponding leakage radius;

[0136] Z3: Determine whether the v circular areas intersect with the same heating pipe; if yes, mark the leakage type as single point, and mark the corresponding heating pipe as a potential leakage pipe; if no, mark the leakage type as multiple points, and mark the corresponding multiple heating pipes that intersect with the v circular areas as potential leakage pipes;

[0137] Z4: Retrieve the connection locations on the potential leaking pipeline and mark them as leak-prone areas; the connection locations include tees, flanges, reducers and welded joints.

[0138] Exemplarily, the leakage radius R(T1) of the alarm device is set to 2.58 m; a circular area is formed with the position of the alarm device as the center and the leakage radius, and the heating pipes in the circular area are marked as potential leakage pipes; the connection positions on the potential leakage pipes are retrieved and marked as leak-prone parts.

[0139] The present invention traces the source of a heating pipe through the position of an alarm device and a corresponding leakage radius, forms a circular area with the position of the alarm device as the center and in combination with the leakage radius, marks the heating pipes in the circular area as potential leakage pipes, retrieves the connection positions on the potential leakage pipes and marks them as leak-prone parts; the leaking heating pipes can be marked quickly and accurately, which is beneficial to improving the accuracy of tracing the source of the leaking heating pipes, and is beneficial to improving the efficiency of tracing the source of the leaking heating pipes.

[0140] The above embodiments are only used to illustrate the technical method of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical method of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical method of the present invention.

Claims

1. A dynamic alarm method for leakage of buried heating pipelines, characterized in that: include: S1: Marking a number of temperature detection devices within a set range of the target device as comparison devices; wherein the comparison devices include a number of temperature detection devices; S2: Obtaining the real-time temperature data corresponding to the target device and each comparison device and the historical temperature data of several consecutive periods; S3: Calculate the corresponding dynamic alarm threshold based on the historical temperature data corresponding to the target device and each comparison device; S4: Calculating the corresponding real-time temperature difference based on the real-time temperature data of the target device and each comparison device; S5: Based on the comparison between the real-time temperature difference and the dynamic alarm threshold, the corresponding device alarm information is obtained; wherein the device alarm information includes the maximum temperature of the alarm device, the average temperature of the comparison device, the device number and the device location; the alarm device includes the target device and the comparison device.

2. A method for dynamic alarm of leakage of buried heating pipeline according to claim 1, characterized in that: The step of marking a plurality of temperature detection devices within a set range of the target device as comparison devices includes: Several temperature detection devices within the set range of the target device and located on the same heating pipe as the target device are marked as comparison devices, and the target device is marked as A, and the comparison device is marked as j; wherein j = 1, 2, ..., m, m is the total number of comparison devices and m ≧ 3.

3. A method for dynamic leakage alarm of underground heating pipeline according to claim 2, characterized in that: The calculating of the corresponding dynamic alarm threshold based on the historical temperature data corresponding to the target device and each comparison device includes: A1: Extract the historical temperature data corresponding to the target device and each comparison device; A2: Calculate the historical temperature difference average and historical temperature standard deviation based on the historical temperature data of the target device and each comparison device; A3: By formula Calculate the dynamic alarm threshold ΔT of the target device A and the comparison device j Aj,th ;in, is the average historical temperature difference between target device A and comparison device j, is the historical temperature standard deviation between target device A and comparison device j, X is the alarm classification parameter, and X is greater than 0.

4. A method for dynamic alarm of leakage of buried heating pipeline according to claim 3, characterized in that: The calculating the historical temperature difference average value and the historical temperature standard deviation based on the historical temperature data of the target device and each comparison device includes: B1: Extract historical temperature data of several consecutive periods; B2: By formula Calculate the historical temperature average of target device A B3: By formula Calculate the historical temperature average of the comparison device j B4: By formula Calculate the average historical temperature difference between target device A and comparison device j B5: By formula Calculate the historical temperature standard deviation of target device A and comparison device j Among them, T A,i represents the temperature data of target device A at the i-th moment, T j,i Indicates the temperature data of device j at the i-th moment, ΔT Aj,i represents the temperature difference between the target device A and the comparison device j at the i-th moment; i=1, 2, ..., n, where n is the total number of samples of historical temperature data.

5. A method for dynamic alarm of leakage of buried heating pipeline according to claim 3, characterized in that: The calculating the corresponding real-time temperature difference based on the real-time temperature data of the target device and each comparison device includes: Extract the real-time temperature data of the target device and each comparison device; By the formula ΔT Aj =|T A -T j | Calculate the real-time temperature difference ΔT between target device A and comparison device j Aj ; Among them, T A is the real-time temperature data of the target device, T j For comparison, the real-time temperature data of device j.

6. A method for dynamic alarm of underground heating pipeline leakage according to claim 5, characterized in that: The comparison based on the real-time temperature difference and the dynamic alarm threshold value includes: C1: Extract the real-time temperature difference ΔT between the target device and each comparison device Aj and dynamic alarm threshold ΔT Aj,th ; C2: randomly select two comparison devices from the comparison devices and mark them as the first comparison device and the second comparison device respectively; C3: Determine the real-time temperature difference ΔT Aj Is the number of devices less than the corresponding dynamic alarm threshold equal to 2? If yes, jump to C1; if no, jump to C4; C4: Determine the real-time temperature difference ΔT Aj Is the number of devices greater than the corresponding dynamic alarm threshold equal to 2? If yes, then output device alarm information and jump to C1; if no, then jump to C5; C5: Select one comparison device from the remaining comparison devices and mark it as the third device; C6: Determine whether the real-time temperature difference between the target device and the third device is greater than the corresponding dynamic alarm threshold; if yes, output the device alarm information; if not, mark the comparison device whose real-time temperature difference exceeds the corresponding alarm threshold as a faulty device, remove the faulty device from the comparison device, and jump to C1.

7. A method for tracing the source of a buried heating pipeline leakage dynamics, applied to a method for alarming a buried heating pipeline leakage dynamics as claimed in any one of claims 1 to 6, characterized in that: The following steps are involved: T1: Retrieve the heating pipeline to be detected within the set distance range from the alarm device and obtain the pipeline design parameters; the pipeline design parameters include pipe diameter, buried depth, heating medium and heating temperature; T2: Construct a mathematical model of soil temperature field based on pipeline design parameters; T3: Solve the mathematical model of soil temperature field to obtain the tracing formula; T4: The leakage radius is calculated according to the tracing formula; T5: Based on the location of the alarm device and the corresponding leakage radius, the heating pipeline is traced to obtain the traceability result; the traceability result includes the traceability information and the leakage type. The traceability information includes the potential leakage pipeline and the leakage-prone parts. The leakage types include single point and multiple points.

8. A method for dynamic tracing of leakage of buried heating pipeline according to claim 7, characterized in that: The soil temperature field mathematical model is constructed based on pipeline design parameters, including: E1: Extract pipeline design parameters; E2: Calculate the radius R0 of the leakage high temperature area by the formula R0 = 1.75D; E3: Calculate the temperature boundary radius R1 by the formula R1=2L+2.1D; E4: By formula The mathematical model of soil temperature field is calculated; among them, D is the pipe diameter, L is the burial depth, T0 is the heating temperature, T2 is the average temperature of all comparison devices after the equipment alarm, and R is the distance from the leakage source.

9. A method for dynamic tracing of leakage of buried heating pipeline according to claim 8, characterized in that: The tracing formula obtained by solving the soil temperature field mathematical model includes: By solving the mathematical model of soil temperature field, the tracing formula is obtained Among them, T1 is the highest temperature of the alarm equipment.

10. A method for dynamic tracing of leakage of buried heating pipeline according to claim 7, characterized in that: The tracing of the heating pipeline based on the location of the alarm device and the corresponding leakage radius includes: Z1: Extract the location of alarm device k and the corresponding leakage radius; where k = 1, 2, ..., v, v is the total number of alarm devices; Z2: With the location of alarm device k as the center, v circular areas are formed in combination with the corresponding leakage radius; Z3: Determine whether the v circular areas intersect with the same heating pipe; if yes, mark the leakage type as single point, and mark the corresponding heating pipe as a potential leakage pipe; if no, mark the leakage type as multiple points, and mark the corresponding multiple heating pipes that intersect with the v circular areas as potential leakage pipes; Z4: Retrieve the connection locations on the potential leaking pipeline and mark them as leak-prone areas; the connection locations include tees, flanges, reducers and welded joints.

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