Anti-freezing self-temperature-control heat tracing cable

Abstract

The present application relates to the field of oil pipeline heat tracing control, and more particularly to a freeze-proof self-control temperature tracing cable, comprising: a pipeline heat tracing unit for providing heat energy for a target oil pipeline, the pipeline heat tracing unit comprising a first heat tracing block and a second heat tracing block; an information acquisition unit for acquiring demand data information; a data analysis unit for determining the working mode of the pipeline heat tracing unit according to the oil reference quantity and increasing the heat tracing temperature of the first heat tracing block when the oil reference quantity is in a preset threshold state; a compensation adjustment unit for determining the adjustment mode of the second heat tracing block according to the temperature adjustment effect parameter difference value and determining whether to adjust the first heat tracing block corresponding to the front compensation pipeline of the pipeline heat tracing unit according to the pipeline liquid flow rate; the present application controls the pipeline heat tracing unit according to the oil heating and insulation effect in the actual working scene, thereby improving the oil temperature control precision.

Description

Technical Field

[0001] This invention relates to the field of heat tracing control for oil pipelines, and more particularly to an antifreeze self-regulating temperature tracing cable. Background Technology

[0002] Electric heat tracing systems for oil pipelines are a heating technology used in oil pipelines. In low-temperature environments, the transported oil may become viscous or even solidify. Electric heat tracing systems can provide a constant heating temperature, ensuring the oil maintains suitable fluidity and preventing pipeline blockage and reduced flow. This is achieved by installing heating cables or heating tapes on the pipeline surface to provide a constant temperature. However, because oil differs from water in its specific heat capacity, which is related to ambient temperature, the specific heat capacity of the oil changes at different temperatures. This affects the oil's heat absorption capacity. Therefore, how to more precisely control the temperature of the heat tracing cables to improve the insulation effect of the oil and pipeline is a problem that technicians urgently need to solve.

[0003] Chinese Patent Publication No. CN110081312B discloses an oilfield pipeline heat tracing control system. The system includes a main control MCU and a power module, a temperature acquisition module, a LoRa module, a pressure acquisition module, a voltage acquisition module, a current acquisition module, and a power control module, all connected to the main control MCU. It uses real-time acquisition of various technical parameters, such as produced fluid temperature, pipeline pressure, outlet sealing temperature, pipeline tail end temperature, radiation temperature, heat tracing cable surface temperature, voltage, and current, as control feedback indicators for the heat tracing system. Heat tracing control is performed based on the viscosity-temperature characteristics of the oil. However, while this oilfield pipeline heat tracing control system discloses a technical solution for controlling the heat tracing system based on acquired technical parameters, it suffers from the following problems: due to variations in crude oil temperature and the temperature of the soil surrounding the buried pipeline, the heating and insulation effect of the electric heat tracing device on the oil at different locations within the pipeline is difficult to maintain consistently, resulting in poor oil temperature control accuracy. Summary of the Invention

[0004] To address this issue, the present invention provides an antifreeze self-regulating temperature tracing cable to overcome the problem of poor oil temperature control accuracy caused by the inability of existing heat tracing cables to control the oil temperature according to the actual working environment.

[0005] To achieve the above objectives, the present invention provides a freeze-proof self-regulating temperature tracing cable, comprising:

[0006] A pipeline heat tracing unit is installed on the surface of a target oil pipeline to provide heat energy to the target oil pipeline. The pipeline heat tracing unit includes a first heat tracing block and a second heat tracing block.

[0007] An information acquisition unit, which is connected to the target oil pipeline, is used to collect demand data information;

[0008] The data analysis unit, which is connected to the pipeline heat tracing unit and the information acquisition unit, is used to determine the working mode of the pipeline heat tracing unit based on the oil reference volume and to increase the heat tracing temperature of the first heat tracing block when the oil reference volume is at a preset threshold.

[0009] The compensation and adjustment unit, connected to the pipeline heat tracing unit, the information acquisition unit, and the data analysis unit, is used to determine the adjustment method of the second heat tracing block based on the temperature adjustment effect parameter difference. This includes adjusting the second heat tracing block corresponding to the downstream compensation pipeline and uniformly adjusting the temperature of the second heat tracing block. The length of the downstream compensation pipeline is related to the initial temperature of the oil.

[0010] When the oil reference volume is at the first preset oil reference volume state or the temperature regulation effect parameter is greater than or equal to the preset temperature regulation effect parameter, the compensation and regulation unit determines whether to adjust the pipeline heat tracing unit based on the pipeline liquid flow velocity; the length of the upstream compensation pipeline is related to the difference in liquid flow velocity stability.

[0011] The required data includes the inlet oil temperature, the outlet oil temperature, the oil flow rate, and the ambient temperature.

[0012] Furthermore, the pipeline heat tracing unit includes:

[0013] A plurality of first heat tracing blocks and a plurality of second heat tracing blocks, wherein a single first heat tracing block and a single second heat tracing block are spaced apart on the surface of the target oil pipeline, and the first heat tracing block and the second heat tracing block are heat tracing wires of the same material but different lengths;

[0014] An insulation layer is provided on the outer surface of the target oil pipeline and covers the first heat tracing block and the second heat tracing block to prevent heat loss from the target oil pipeline.

[0015] Wherein, the heating length of the first heat tracing module for the target oil pipeline is greater than the heating length of the second heat tracing module for the target oil pipeline.

[0016] Furthermore, the data analysis unit determines the operating mode of the pipeline heat tracing unit based on the oil reference volume under the first data analysis conditions;

[0017] If the oil reference volume is at the first preset oil reference volume state, the data analysis unit determines that the pipeline heat tracing unit continues to use the first working mode.

[0018] If the oil reference volume is in the second preset oil reference volume state, the data analysis unit determines that the pipeline heat tracing unit adopts the second working mode.

[0019] The first working mode is that only the first heat tracing block and the second heat tracing block have the same heat tracing temperature; the second working mode is that the first heat tracing block and the second heat tracing block adopt segmented heat tracing.

[0020] Wherein, the first preset oil reference quantity state is when the oil temperature difference is less than the preset oil temperature difference and the oil temperature at the outlet meets the standard; the second preset oil reference quantity state is when the oil temperature difference is greater than the preset oil temperature difference and / or the oil temperature at the outlet does not meet the standard; and the first data analysis condition is the preset working time of the pipeline heat tracing unit in the first working mode.

[0021] Furthermore, under the second data analysis condition, the data analysis unit increases and adjusts the heat tracing temperature of the first heat tracing block according to the oil temperature at the outlet end;

[0022] The increase in the outlet oil temperature is negatively correlated with the increase in the heat tracing temperature of the first heat tracing block.

[0023] The second data analysis condition is that the oil reference volume is in the second preset oil reference volume state.

[0024] Furthermore, under the third data analysis condition, the data analysis unit determines whether to adjust the second heat tracing block based on the temperature regulation effect parameters;

[0025] If the temperature regulation effect parameter is greater than or equal to the preset temperature regulation effect parameter, the data analysis unit determines that there is no need to adjust the second heat tracing block;

[0026] If the temperature regulation effect parameter is less than the preset temperature regulation effect parameter, the data analysis unit determines to increase the heat tracing temperature of the second heat tracing block.

[0027] The third data analysis condition is that the increase in the heat tracing temperature of the first heat tracing block is completed and the running time of the pipeline heat tracing unit reaches the preset response time after the adjustment is completed.

[0028] Furthermore, the compensation adjustment unit determines the adjustment mode of the second heat tracing block based on the temperature adjustment effect parameter difference under the first compensation adjustment condition;

[0029] If the temperature regulation effect parameter difference is within the range of the first preset effect parameter difference, the compensation adjustment unit determines to increase the heat tracing temperature of the second heat tracing block corresponding to the downstream compensation pipeline.

[0030] If the temperature regulation effect parameter difference is within the range of the second preset effect parameter difference, the compensation adjustment unit determines to uniformly increase the temperature of the second heat tracing block.

[0031] The increase in the heat tracing temperature of the second heat tracing block is positively correlated with the difference in the temperature regulation effect parameter.

[0032] The first compensation adjustment condition is that the temperature regulation effect parameter is less than the preset temperature regulation effect parameter.

[0033] Furthermore, under the second compensation adjustment condition, the compensation adjustment unit determines the length of the subsequent compensation pipeline based on the average initial temperature of the oil.

[0034] The initial temperature of the oil is negatively correlated with the length of the subsequent compensation pipeline.

[0035] The second compensation adjustment condition is that the difference in temperature regulation effect parameters is within the range of the first preset effect parameter difference.

[0036] Furthermore, the compensation adjustment unit detects the pipeline liquid flow rate under the third compensation adjustment condition and determines whether to adjust the pipeline heat tracing unit based on the pipeline liquid flow rate;

[0037] If the liquid flow velocity in the pipeline is at the first liquid flow velocity state, the compensation adjustment unit determines that there is no need to adjust the pipeline heat tracing unit;

[0038] If the liquid flow velocity in the pipeline is in the second pipeline liquid flow velocity state, the compensation adjustment unit determines to adjust the heat tracing temperature of the first heat tracing block corresponding to the upstream compensation pipeline according to the liquid flow velocity stability difference.

[0039] The third compensation adjustment condition is that the oil reference quantity is in the first preset oil reference quantity state or the temperature regulation effect parameter is greater than or equal to the preset temperature regulation effect parameter, the first pipeline liquid flow rate state is that the liquid flow rate stability is greater than or equal to the preset liquid flow rate stability, and the second pipeline liquid flow rate state is that the liquid flow rate stability is less than the preset liquid flow rate stability.

[0040] Furthermore, under the fourth compensation adjustment condition, the compensation adjustment unit determines the length of the upstream compensation pipeline based on the difference in liquid flow velocity stability.

[0041] The length of the upstream compensation pipe is positively correlated with the difference in liquid flow velocity stability.

[0042] The fourth compensation adjustment condition is that the liquid flow velocity in the pipeline is in the state of the second liquid flow velocity in the pipeline, and the adjustment of the heat tracing temperature of the first heat tracing block corresponding to the upstream compensation pipeline is an increase adjustment. The increase in the heat tracing temperature of the first heat tracing block is positively correlated with the difference in the stability of the liquid flow velocity.

[0043] Furthermore, the first heat tracing module and the second heat tracing module are respectively set with an opening temperature, which is related to the current ambient temperature.

[0044] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention achieves the function of segmented heating and insulation of the target oil pipeline through the first and second heat tracing blocks, which greatly eliminates the problem of poor oil temperature control accuracy caused by uniform heating and insulation in some prior art. In addition, the data analysis unit of the present invention determines the working mode of the pipeline heat tracing unit based on the oil reference volume and selects the working mode of the pipeline heat tracing unit according to the actual working conditions, making the determination of the working mode more accurate. In the first working mode, only the first heat tracing block operates, which reduces the energy consumption of the pipeline heat tracing unit while ensuring the oil heating and insulation effect. Furthermore, in the third data analysis condition, the data analysis unit determines whether to adjust the second heat tracing block based on the temperature regulation effect parameters. Compared with the technical solution of uniform adjustment of heat tracing components, the adjustment accuracy of the present invention is higher.

[0045] Furthermore, under the second data analysis condition, the data analysis unit of the present invention increases and adjusts the heat tracing temperature of the first heat tracing block according to the oil temperature at the outlet end, thereby avoiding the oil condensation phenomenon caused by the oil temperature being too low, and further improving the heating and heat preservation effect of the oil and pipeline of the present invention.

[0046] Furthermore, in this invention, when the temperature regulation effect parameter difference is within the range of the first preset effect parameter difference, the compensation adjustment unit increases the heat tracing temperature of the second heat tracing block corresponding to the downstream compensation pipeline. Considering the influence of the initial oil temperature on the heat tracing effect, the problem of excessive initial oil temperature caused by heating the oil at the inlet end is avoided. While ensuring the oil heating and heat preservation effect, the energy utilization rate of the pipeline heat tracing unit is improved.

[0047] Furthermore, in this invention, if the liquid flow velocity in the pipeline is in the second pipeline liquid flow velocity state, the compensation adjustment unit determines whether to adjust the heat tracing temperature of the first heat tracing block corresponding to the upstream compensation pipeline based on the liquid flow velocity stability difference, thereby avoiding the problem of poor heat tracing effect of the heat tracing cable caused by changes in oil viscosity and improving the oil transmission speed of the pipeline. Attached Figure Description

[0048] Figure 1 This is a connection diagram of the unit components of the antifreeze self-regulating temperature tracing cable according to an embodiment of the present invention;

[0049] Figure 2 This is a schematic diagram of a pipeline heat tracing unit according to an embodiment of the present invention;

[0050] Figure 3 This is a schematic cross-sectional view of the heat tracing wire according to an embodiment of the present invention;

[0051] In the diagram: 1, target oil pipeline; 2, heat tracing wire; 3, first heat tracing module; 4, second heat tracing module; 5, heating cable; 6, insulation protection layer; 7, low-halogen polyolefin sheath layer. Detailed Implementation

[0052] To make the objectives and advantages of the present invention clearer, the present invention will be further described below with reference to embodiments; it should be understood that the specific embodiments described herein are merely for explaining the present invention and are not intended to limit the present invention.

[0053] Preferred embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0054] It should be noted that in the description of this invention, the terms "upper", "lower", "left", "right", "inner", "outer", etc., which indicate directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. This is only for the convenience of description and is not intended to indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this invention.

[0055] Furthermore, it should be noted that, in the description of this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0056] Please see Figure 1 The diagram shown is a unit component connection diagram of the antifreeze self-regulating temperature tracing cable according to an embodiment of the present invention. The present invention provides an antifreeze self-regulating temperature tracing cable, comprising:

[0057] A pipeline heat tracing unit is installed on the surface of a target oil pipeline to provide heat energy to the target oil pipeline. The pipeline heat tracing unit includes a first heat tracing block and a second heat tracing block.

[0058] An information acquisition unit, which is connected to the target oil pipeline, is used to collect demand data information;

[0059] The data analysis unit, which is connected to the pipeline heat tracing unit and the information acquisition unit, is used to determine the working mode of the pipeline heat tracing unit based on the oil reference volume and to increase the heat tracing temperature of the first heat tracing block when the oil reference volume is at a preset threshold.

[0060] The compensation and adjustment unit, connected to the pipeline heat tracing unit, the information acquisition unit, and the data analysis unit, is used to determine the adjustment method of the second heat tracing block based on the temperature adjustment effect parameter difference. This includes adjusting the second heat tracing block corresponding to the downstream compensation pipeline and uniformly adjusting the temperature of the second heat tracing block. The length of the downstream compensation pipeline is related to the initial temperature of the oil.

[0061] When the oil reference volume is at the first preset oil reference volume state or the temperature regulation effect parameter is greater than or equal to the preset temperature regulation effect parameter, the compensation and regulation unit determines whether to adjust the pipeline heat tracing unit based on the pipeline liquid flow velocity; the length of the upstream compensation pipeline is related to the difference in liquid flow velocity stability.

[0062] The required data includes the inlet oil temperature, the outlet oil temperature, the oil flow rate, and the ambient temperature.

[0063] Specifically, the inlet oil temperature is the oil temperature at the inlet of the target oil pipeline, and the outlet oil temperature is the oil temperature at the outlet of the target oil pipeline. The oil temperature is detected by a temperature sensor.

[0064] Please see Figures 2 to 3 As shown, the pipe heat tracing unit includes:

[0065] A plurality of first heat tracing blocks 3 and a plurality of second heat tracing blocks 4, wherein a single first heat tracing block 3 and a single second heat tracing block 4 are spaced apart on the surface of the target oil pipeline 1, and the first heat tracing block 3 and the second heat tracing block 4 are heat tracing wires 2 of the same material but different lengths;

[0066] An insulation layer (not shown) is provided on the outer surface of the target oil pipeline 1 and covers the first heat tracing block 3 and the second heat tracing block 4 to prevent heat loss from the target oil pipeline 1.

[0067] The first heat tracing block 3 has a heating length for the target oil pipeline 1 that is greater than the heating length for the second heat tracing block 4. Each of the first heat tracing blocks 3 and each of the second heat tracing blocks 4 is connected to a switch assembly that is controlled independently.

[0068] The heat tracing conductor 2 includes two heating cables 5, each heating cable 5 is covered with an insulating protective layer 6, and the two heating cables 5 are together covered with a low-halogen polyolefin sheath layer 7.

[0069] Please continue reading. Figure 1 As shown, the data analysis unit determines the working mode of the pipeline heat tracing unit based on the oil reference volume under the first data analysis condition;

[0070] If the oil reference volume is at the first preset oil reference volume state, the data analysis unit determines that the pipeline heat tracing unit continues to use the first working mode.

[0071] If the oil reference volume is in the second preset oil reference volume state, the data analysis unit determines that the pipeline heat tracing unit adopts the second working mode.

[0072] The first working mode is that only the first heat tracing block and the second heat tracing block have the same heat tracing temperature; the second working mode is that the first heat tracing block and the second heat tracing block adopt segmented heat tracing.

[0073] The first preset oil reference quantity state is when the oil temperature difference is less than the preset oil temperature difference and the oil temperature at the outlet meets the standard. The second preset oil reference quantity state is when the oil temperature difference is greater than the preset oil temperature difference and / or the oil temperature at the outlet does not meet the standard. The first data analysis condition is the preset working time of the pipeline heat tracing unit in the first working mode. When the pipeline heat tracing unit is turned on, it uses the first working mode. When the working time in the first working mode reaches the preset working time, the data analysis unit redetermines the working mode of the pipeline heat tracing unit according to the oil reference quantity under the first data analysis condition, so as to ensure that the working mode of the pipeline heat tracing unit is more in line with the actual application scenario.

[0074] Specifically, the oil temperature difference is the difference between the inlet oil temperature and the outlet oil temperature. A preset oil temperature difference value is provided. Users can detect the viscosity of the oil at different temperatures and record the temperature corresponding to the viscosity that meets their needs as the required temperature. If the preset oil temperature difference is less than 0, the data analysis unit determines that the pipeline temperature is too high and transmits the determination information to the user to remind them to control and reduce the temperature of the pipeline heating unit. A device for measuring oil viscosity is provided, using a rotational viscometer. The rotational viscometer agitates the oil by rotating the measuring device and measures the required torque or rotation speed to determine the viscosity. The unit of viscosity is mPa·s. The preset working time can be set by the user according to the actual application scenario; this is easily understood by those skilled in the art and will not be elaborated here.

[0075] Specifically, under the second data analysis condition, the data analysis unit increases and adjusts the heat tracing temperature of the first heat tracing block according to the oil temperature at the outlet end;

[0076] The increase in the outlet oil temperature is negatively correlated with the increase in the heat tracing temperature of the first heat tracing block.

[0077] The second data analysis condition is that the oil reference volume is in the second preset oil reference volume state.

[0078] Specifically, under the third data analysis condition, the data analysis unit determines whether to adjust the second heat tracing block based on the temperature regulation effect parameters;

[0079] If the temperature regulation effect parameter is greater than or equal to the preset temperature regulation effect parameter, the data analysis unit determines that there is no need to adjust the second heat tracing block;

[0080] If the temperature regulation effect parameter is less than the preset temperature regulation effect parameter, the data analysis unit determines to increase the heat tracing temperature of the second heat tracing block.

[0081] The third data analysis condition is that the increase in the heat tracing temperature of the first heat tracing block is completed and the running time of the pipeline heat tracing unit reaches the preset response time after the adjustment is completed.

[0082] Specifically, the preset response time can be determined by the user through experiments. That is, the oil sample at the inlet is obtained, the oil sample at different temperatures is heated, and the average of the sum of the heating times corresponding to the viscosity of the oil meeting the user's viscosity requirements is recorded as the preset response time. The temperature regulation effect parameter is the change in oil temperature at the outlet within a single regulation monitoring cycle. The change is an absolute value, and the preset temperature regulation effect parameter is 60% of the oil temperature difference.

[0083] Specifically, the compensation adjustment unit determines the adjustment mode of the second heat tracing block based on the temperature adjustment effect parameter difference under the first compensation adjustment condition;

[0084] If the temperature regulation effect parameter difference is within the range of the first preset effect parameter difference, the compensation adjustment unit determines to increase the heat tracing temperature of the second heat tracing block corresponding to the downstream compensation pipeline.

[0085] If the temperature regulation effect parameter difference is within the range of the second preset effect parameter difference, the compensation adjustment unit determines to uniformly increase the temperature of the second heat tracing block.

[0086] The increase in the heat tracing temperature of the second heat tracing block is positively correlated with the difference in the temperature regulation effect parameter.

[0087] The first compensation adjustment condition is that the temperature regulation effect parameter is less than the preset temperature regulation effect parameter.

[0088] Specifically, the temperature regulation effect parameter difference is the value obtained by subtracting the temperature regulation effect parameter from the preset temperature regulation effect parameter. The values ​​within the first preset effect parameter difference range are all less than or equal to 30% of the oil temperature difference, and the values ​​within the second preset effect parameter difference range are all greater than 30% of the oil temperature difference.

[0089] Specifically, under the second compensation adjustment condition, the compensation adjustment unit determines the length of the subsequent compensation pipeline based on the average initial temperature of the oil.

[0090] The initial temperature of the oil is negatively correlated with the length of the subsequent compensation pipeline.

[0091] The second compensation adjustment condition is that the difference in temperature regulation effect parameters is within the range of the first preset effect parameter difference.

[0092] Specifically, the portion of the target oil pipeline with the outlet end as the starting point is designated as the downstream compensation pipeline. The initial average oil temperature is the average value of the oil temperature detected at the outlet end within the temperature monitoring cycle. The information acquisition unit detects the oil temperature at the outlet end N times within a single temperature monitoring cycle, and the average value of the oil temperature at the outlet end is the average value of the sum of the N oil temperatures at the outlet end within a single temperature monitoring cycle. The user can set the temperature monitoring cycle and the value of N according to the actual working scenario. The larger the value of N, the more accurate the average value of the oil temperature at the outlet end is in representing the oil temperature at the outlet end.

[0093] Specifically, the compensation adjustment unit detects the pipeline liquid flow rate under the third compensation adjustment condition and determines whether to adjust the pipeline heat tracing unit based on the pipeline liquid flow rate.

[0094] If the liquid flow velocity in the pipeline is at the first liquid flow velocity state, the compensation adjustment unit determines that there is no need to adjust the pipeline heat tracing unit;

[0095] If the liquid flow velocity in the pipeline is at the second liquid flow velocity state, the compensation adjustment unit determines whether to adjust the heat tracing temperature of the first heat tracing block corresponding to the upstream compensation pipeline based on the pipeline pressure.

[0096] The third compensation adjustment condition is that the oil reference quantity is in the first preset oil reference quantity state or the temperature regulation effect parameter is greater than or equal to the preset temperature regulation effect parameter, the first pipeline liquid flow rate state is that the liquid flow rate stability is greater than or equal to the preset liquid flow rate stability, and the second pipeline liquid flow rate state is that the liquid flow rate stability is less than the preset liquid flow rate stability.

[0097] Specifically, the information acquisition unit detects the pipeline liquid flow rate every 10 minutes and records the absolute value of the difference between the currently detected pipeline liquid flow rate and the most recently detected pipeline liquid flow rate as the pipeline flow rate stability. If the difference between the currently detected pipeline liquid flow rate and the most recently detected pipeline liquid flow rate is greater than 0, then there is no need to adjust the heat tracing temperature of the first heat tracing block. The preset liquid flow rate stability is 10% of the most recently detected pipeline liquid flow rate. Due to the non-fixed viscosity of the oil at the inlet end, the heat tracing temperature of the first heat tracing block corresponding to the upstream compensation pipeline is adjusted according to the liquid flow rate stability to avoid excessive oil viscosity affecting the oil flow rate.

[0098] Specifically, under the fourth compensation adjustment condition, the compensation adjustment unit determines the length of the upstream compensation pipeline based on the difference in liquid flow velocity stability.

[0099] The length of the upstream compensation pipe is positively correlated with the difference in liquid flow velocity stability.

[0100] Wherein, the fourth compensation adjustment condition is that the pipeline liquid flow velocity is in the second pipeline liquid flow velocity state, the adjustment of the heat tracing temperature of the first heat tracing block corresponding to the upstream compensation pipeline is an increase adjustment, the increase in the heat tracing temperature of the first heat tracing block is positively correlated with the liquid flow velocity stability difference, the liquid flow velocity stability difference is the absolute value of the difference between the liquid flow velocity stability and the preset liquid flow velocity stability; the first heat tracing block corresponding to the upstream compensation pipeline is a complete first heat tracing block on the upstream compensation pipeline, the complete first heat tracing block is when the entire first heat tracing block is located on the upstream compensation pipeline, and the second heat tracing block corresponding to the downstream compensation pipeline is a complete second heat tracing block on the downstream compensation pipeline.

[0101] Specifically, the portion of the target oil pipeline with the inlet end as the starting point is designated as the upstream compensation pipeline. The first heat tracing module and the second heat tracing module are respectively set with an opening temperature, which is related to the current ambient temperature.

[0102] The technical solution of the present invention has been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the scope of protection of the present invention.

[0103] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A freeze-proof, self-regulating temperature tracing cable, characterized in that, include: A pipeline heat tracing unit is installed on the surface of a target oil pipeline to provide heat energy to the target oil pipeline. The pipeline heat tracing unit includes a first heat tracing block and a second heat tracing block. An information acquisition unit, which is connected to the target oil pipeline, is used to collect demand data information; The data analysis unit, which is connected to the pipeline heat tracing unit and the information acquisition unit, is used to determine the working mode of the pipeline heat tracing unit based on the oil reference volume and to increase the heat tracing temperature of the first heat tracing block when the oil reference volume is at a preset threshold. The compensation and adjustment unit, connected to the pipeline heat tracing unit, the information acquisition unit, and the data analysis unit, is used to determine the adjustment method of the second heat tracing block based on the temperature adjustment effect parameter difference. This includes adjusting the second heat tracing block corresponding to the downstream compensation pipeline and uniformly adjusting the temperature of the second heat tracing block. The length of the downstream compensation pipeline is related to the initial temperature of the oil. When the oil reference volume is at the first preset oil reference volume state or the temperature regulation effect parameter is greater than or equal to the preset temperature regulation effect parameter, the compensation and regulation unit determines whether to adjust the first heat tracing block corresponding to the upstream compensation pipeline of the pipeline heat tracing unit based on the pipeline liquid flow velocity; the length of the upstream compensation pipeline is related to the difference in liquid flow velocity stability. The required data information includes the oil temperature at the inlet, the oil temperature at the outlet, the oil flow rate, and the ambient temperature. The pipeline heat tracing unit includes: A plurality of first heat tracing blocks and a plurality of second heat tracing blocks, wherein a single first heat tracing block and a single second heat tracing block are spaced apart on the surface of the target oil pipeline, and the first heat tracing block and the second heat tracing block are heat tracing wires of the same material but different lengths; An insulation layer is provided on the outer surface of the target oil pipeline and covers the first heat tracing block and the second heat tracing block to prevent heat loss from the target oil pipeline. Wherein, the heating length of the first heat tracing module for the target oil pipeline is greater than the heating length of the second heat tracing module for the target oil pipeline; The data analysis unit determines the working mode of the pipeline heat tracing unit based on the oil reference volume under the first data analysis condition. If the oil reference volume is at the first preset oil reference volume state, the data analysis unit determines that the pipeline heat tracing unit continues to use the first working mode. If the oil reference volume is in the second preset oil reference volume state, the data analysis unit determines that the pipeline heat tracing unit adopts the second working mode. The first working mode is that only the first heat tracing block and the second heat tracing block have the same heat tracing temperature; the second working mode is that the first heat tracing block and the second heat tracing block adopt segmented heat tracing. Wherein, the first preset oil reference quantity state is when the oil temperature difference is less than the preset oil temperature difference and the oil temperature at the outlet meets the standard; the second preset oil reference quantity state is when the oil temperature difference is greater than the preset oil temperature difference and / or the oil temperature at the outlet does not meet the standard; and the first data analysis condition is the preset working time of the pipeline heat tracing unit in the first working mode. The data analysis unit adjusts the heat tracing temperature of the first heat tracing block according to the oil temperature at the outlet end under the second data analysis condition. The increase in the outlet oil temperature is negatively correlated with the increase in the heat tracing temperature of the first heat tracing block. The second data analysis condition is that the oil reference volume is in the second preset oil reference volume state.

2. The antifreeze self-regulating temperature tracing cable according to claim 1, characterized in that, The data analysis unit determines whether to adjust the second heat tracing block based on the temperature regulation effect parameters under the third data analysis condition. If the temperature regulation effect parameter is greater than or equal to the preset temperature regulation effect parameter, the data analysis unit determines that there is no need to adjust the second heat tracing block; If the temperature regulation effect parameter is less than the preset temperature regulation effect parameter, the data analysis unit determines to increase the heat tracing temperature of the second heat tracing block. The third data analysis condition is that the increase in the heat tracing temperature of the first heat tracing block is completed and the running time of the pipeline heat tracing unit reaches the preset response time after the adjustment is completed.

3. The antifreeze self-regulating temperature tracing cable according to claim 2, characterized in that, The compensation and adjustment unit determines the adjustment mode of the second heat tracing block based on the temperature regulation effect parameter difference under the first compensation and adjustment condition; If the temperature regulation effect parameter difference is within the range of the first preset effect parameter difference, the compensation adjustment unit determines to increase the heat tracing temperature of the second heat tracing block corresponding to the downstream compensation pipeline. If the temperature regulation effect parameter difference is within the range of the second preset effect parameter difference, the compensation adjustment unit determines to uniformly increase the temperature of the second heat tracing block. The increase in the heat tracing temperature of the second heat tracing block is positively correlated with the difference in the temperature regulation effect parameter. The first compensation adjustment condition is that the temperature regulation effect parameter is less than the preset temperature regulation effect parameter.

4. The antifreeze self-regulating temperature tracing cable according to claim 3, characterized in that, The compensation adjustment unit determines the length of the subsequent compensation pipeline based on the average initial temperature of the oil under the second compensation adjustment condition. The initial temperature of the oil is negatively correlated with the length of the subsequent compensation pipeline. The second compensation adjustment condition is that the difference in temperature regulation effect parameters is within the range of the first preset effect parameter difference.

5. The antifreeze self-regulating temperature tracing cable according to claim 4, characterized in that, The compensation and adjustment unit detects the pipeline liquid flow rate under the third compensation and adjustment condition and determines whether to adjust the pipeline heat tracing unit based on the pipeline liquid flow rate. If the liquid flow velocity in the pipeline is at the first liquid flow velocity state, the compensation adjustment unit determines that there is no need to adjust the pipeline heat tracing unit; If the liquid flow velocity in the pipeline is in the second pipeline liquid flow velocity state, the compensation adjustment unit determines to adjust the heat tracing temperature of the first heat tracing block corresponding to the upstream compensation pipeline according to the liquid flow velocity stability difference. The third compensation adjustment condition is that the oil reference quantity is in the first preset oil reference quantity state or the temperature regulation effect parameter is greater than or equal to the preset temperature regulation effect parameter, the first pipeline liquid flow rate state is that the liquid flow rate stability is greater than or equal to the preset liquid flow rate stability, and the second pipeline liquid flow rate state is that the liquid flow rate stability is less than the preset liquid flow rate stability.

6. The antifreeze self-regulating temperature tracing cable according to claim 5, characterized in that, Under the fourth compensation adjustment condition, the compensation adjustment unit determines the length of the upstream compensation pipeline based on the difference in liquid flow velocity stability. The length of the upstream compensation pipe is positively correlated with the difference in liquid flow velocity stability. The fourth compensation adjustment condition is that the liquid flow velocity in the pipeline is in the state of the second liquid flow velocity in the pipeline, and the adjustment of the heat tracing temperature of the first heat tracing block corresponding to the upstream compensation pipeline is an increase adjustment. The increase in the heat tracing temperature of the first heat tracing block is positively correlated with the difference in the stability of the liquid flow velocity.

7. The antifreeze self-regulating temperature tracing cable according to claim 6, characterized in that, The first heat tracing module and the second heat tracing module are respectively set with an opening temperature, which is related to the current ambient temperature.

Images