Optical fiber winding temperature measuring device suitable for magnetically controlled reactor

Abstract

The utility model belongs to the technical field of temperature measuring devices, and particularly relates to an optical fiber winding temperature measuring device suitable for a magnetically controlled reactor, which comprises a wave-shaped heat-conducting oil pipe, an oil cylinder is communicated and fixed between two ports of the heat-conducting oil pipe, and a piston is axially inserted in the oil cylinder at a position lower than the ports of the heat-conducting oil pipe. A compression spring is fixed to the lower surface of the piston, the lower end of the compression spring spirally extends in the axial direction of the piston and is fixedly connected to the lower wall of the oil cylinder, a circulation assembly and a temperature measuring probe are fixed to the outer side of the oil cylinder at intervals, the detection end of the temperature measuring probe extends into the oil cylinder, and a gap is reserved between the temperature measuring probe and the piston. The circulating assembly comprises two flow dividing pipes fixedly communicated with the outer side of the oil cylinder and further comprises an oil pump, and the output end of the oil pump is fixedly communicated with a port of one flow dividing pipe. According to the utility model, the high-temperature heat-conducting oil can be decompressed, so that the conditions of pipe explosion and oil leakage are avoided, and the heat-conducting oil can be used for continuously measuring the temperature of the winding.

Description

Technical Field

[0001] The utility model belongs to the technical field of temperature measuring devices, and particularly relates to an optical fiber winding temperature measuring device applicable to a magnetically controlled reactor. Background Technique

[0002] All kinds of faults of high-voltage dry-type magnetically controlled reactors, such as short circuits, overloads, and electric leakage, may lead to fires. Among them, those caused by inter-turn short circuits account for more than 70%. When an inter-turn short circuit fault occurs in a dry-type magnetically controlled reactor, the local temperature at the short circuit position rises sharply, accelerating the insulation aging near the short-circuited turns, and it is necessary to monitor the temperature change in real time.

[0003] Traditional magnetically controlled reactors are equipped with several temperature measuring probes at their iron cores, and then the monitoring signals are transmitted by temperature-resistant optical fibers. The temperature measuring probes can timely detect the fire source, providing a good basis for the intelligent response of the electric fire protection system. The temperature-resistant optical fibers are externally connected to a decoder and a digital signal processor, and then transferred to the MCR controller.

[0004] When the existing magnetically controlled reactor measures temperature, several temperature measuring probes are arranged inside the iron core to monitor the temperature in real time, and the monitoring signals are transmitted outward by high-temperature-resistant optical fibers. However, the winding has a larger volume and area than the iron core, and the temperature measurement range of the temperature measuring probes is much smaller than the surface area of the winding. Instead, a heat-conducting oil pipeline is used to conduct heat outside the winding. The heat-conducting oil expands when heated and is likely to burst the pipeline, which is not conducive to the continuous temperature measurement of the winding by the heat-conducting oil. Therefore, we propose an optical fiber winding temperature measuring device applicable to a magnetically controlled reactor. Content of the Utility Model

[0005] The purpose of the utility model is to provide an optical fiber winding temperature measuring device applicable to a magnetically controlled reactor, which can relieve the pressure of high-temperature heat-conducting oil and avoid the occurrence of pipe explosion and oil leakage, so as to continuously measure the temperature of the winding by using the heat-conducting oil.

[0006] The technical solution adopted by the utility model is specifically as follows:

[0007] A fiber optic winding temperature measuring device suitable for a magnetron reactor comprises a heat conducting oil pipe, the heat conducting oil pipe is wavy, an oil cylinder is connected and fixed between two ends of the heat conducting oil pipe, a piston is axially inserted at a position lower than the end of the heat conducting oil pipe in the oil cylinder, a compression spring is fixed on the lower surface of the piston, the lower end of the compression spring spirally extends along the axial direction of the piston and the lower end is fixedly connected to the lower wall of the oil cylinder, a circulation component and a temperature measuring probe are fixed at intervals on the outside of the oil cylinder, the detection end of the temperature measuring probe extends into the inside of the oil cylinder, a distance is left between the temperature measuring probe and the piston, when working, the oil cylinder and the circulation component are fixed to the outside of the dry magnetron reactor, the heat conducting oil pipe penetrates into the dry magnetron reactor, and the oil cylinder and the circulation component are fixed to the outside of the dry magnetron reactor. The serpentine shape surrounds the outside of the winding, and the circulation component is started to pump the heat transfer oil along the heat transfer oil pipe, the oil cylinder and the circulation component. The circulating heat transfer oil takes away the heat of the winding and transfers it to the temperature measuring probe. Since most of the heat transfer oil pipes are arranged outside the closed dry magnetically controlled reactor, the heat loss of the heat transfer oil pipe is very small and can be basically ignored. The temperature measuring probe monitors the temperature signal along the optical winding and transmits it to the wireless fire alarm automatic fire extinguishing system. Once the temperature of the heat transfer oil is higher than 80℃, it will gradually expand, and the piston will be pushed forward to squeeze the compression spring inside the oil cylinder, which can relieve the pressure of the high-temperature heat transfer oil and avoid the occurrence of pipe explosion and oil leakage, so as to use the heat transfer oil to continuously measure the temperature of the winding.

[0008] The circulation component includes two shunt pipes connected and fixed to the outside of the oil cylinder, and also includes an oil pump. The output end of the oil pump is connected and fixed to a shunt pipe port, and the liquid inlet end of the oil pump is connected and fixed to the other shunt pipe port. The oil pump is started to encourage the hydraulic oil to circulate along the two shunt pipes, the oil cylinder and the heat-conducting oil pipe. In addition, the oil pump is externally placed and is less affected by the electric field of the winding. The plastic coating layer shields the charge, thereby avoiding the generation of arcs.

[0009] A circular groove adapted to the piston is provided on the inner side of the oil cylinder, and a spacing is left between the circular groove and the heat transfer oil pipe and the diversion pipe. The circular groove is used to guide the piston to prevent the piston from tilting, and the piston can also be limited to prevent the piston from blocking the heat transfer oil pipe port.

[0010] A partition is axially fixed in the middle of the upper wall of the oil cylinder, and the partition separates the two ends of the heat transfer oil pipe, so that the two ends of the heat transfer oil pipe are facing two diversion pipes respectively, forming two chambers, which are respectively used for the discharge and reflux of the heat transfer oil, so that the circulation flow of the heat transfer oil can be carried out in an orderly manner.

[0011] A shielding cover is fixed to the outside of the oil pump, and the surface of the shielding cover has rounded corners to reduce the occurrence of tip discharge caused by sharp points. The shielding cover can be concave or fully wrapped, separating the oil pump and the dry magnetically controlled inductor, and serving as an electromagnetic shielding layer outside the oil pump to further improve the safety of the oil pump during operation.

[0012] A heat dissipation fan is fixed on the outer surface of the shielding cover. The air outlet of the heat dissipation fan faces the oil pump. When extinguishing the fire, the heat dissipation fan can be started to blow air towards the oil pump to dissipate heat from the oil pump and the nearby heat-conducting oil, facilitating the cooling and contraction of the heat-conducting oil. And under the action of the compression spring, the piston is pushed reversely to reset inside the oil cylinder.

[0013] The technical effects achieved by the present utility model are as follows:

[0014] In a fiber winding temperature measuring device applicable to a magnetically controlled reactor of the present utility model, during operation, the oil cylinder and the circulation assembly are fixed outside the dry-type magnetically controlled reactor. The heat-conducting oil pipe penetrates into the dry-type magnetically controlled reactor and is wound around the outside of the winding in a snake shape. The circulation assembly is started to pump the heat-conducting oil to circulate inside the heat-conducting oil pipe, the oil cylinder and the circulation assembly. The heat-conducting oil flowing in a cycle takes away the heat of the winding and transfers it to the temperature measuring probe. Since most of the heat-conducting oil pipe is arranged outside the sealed dry-type magnetically controlled reactor, the heat loss of the heat-conducting oil pipe is extremely small and can be basically ignored. The temperature measuring probe monitors the temperature signal and transmits it along the optical fiber winding to the wireless fire alarm and automatic fire extinguishing system. Once the temperature of the heat-conducting oil is higher than 80 °C, it will gradually expand, and by pushing the piston forward inside the oil cylinder to compress the compression spring, the high-temperature heat-conducting oil can be depressurized to avoid the situation of pipe explosion and oil leakage, so as to continuously measure the temperature of the winding by using the heat-conducting oil. Description of the Drawings

[0015] Figure 1 is the front view of a fiber winding temperature measuring device applicable to a magnetically controlled reactor of the present utility model;

[0016] Figure 2 is the cross-sectional view of the oil cylinder of the present utility model;

[0017] Figure 3 is the front view of the compression spring of the present utility model;

[0018] Figure 4 is the cross-sectional view of the shielding cover of the present utility model;

[0019] Figure 5 is the system block diagram of the wireless fire alarm and automatic fire extinguishing system involved in the present utility model.

[0020] In the drawings, the list of components represented by each reference numeral is as follows:

[0021] 1. Heat-conducting oil pipe; 2. Oil cylinder; 3. Piston; 4. Compression spring; 5. Temperature measuring probe; 6. Shunt pipe; 7. Oil pump; 8. Circular groove; 9. Partition board; 10. Shielding cover; 11. Heat dissipation fan. Detailed Embodiment

[0022] In order to make the purpose and advantages of the present utility model more clear and understandable, the present utility model will be specifically described below in conjunction with embodiments. It should be understood that the following text is only used to describe one or several specific implementation manners of the present utility model, and does not strictly limit the scope of protection specifically claimed for the present utility model.

[0023] As Figures 1 - 5 shown, a fiber winding temperature measuring device applicable to a magnetically controlled reactor includes a heat-conducting oil pipe 1. The heat-conducting oil pipe 1 can be made of silica gel material with good heat conductivity. The heat-conducting oil pipe 1 is in a wavy shape. An oil cylinder 2 is fixedly connected and communicated between the two ports of the heat-conducting oil pipe 1. A piston 3 is axially inserted at a position inside the oil cylinder 2 lower than the port of the heat-conducting oil pipe 1. A compression spring 4 is fixedly connected to the lower surface of the piston 3. The compression spring 4, the compression spring 4 extends spirally along the axial direction of the piston 3 at the lower end and the lower end is fixedly connected to the lower wall of the oil cylinder 2. A circulation component and a temperature measuring probe 5 are fixedly arranged at intervals outside the oil cylinder 2. For a temperature measuring system of an internal iron core magnetic valve of a magnetically controlled shunt reactor in a Chinese utility model with a reference publication number of CN208171474U, the end of the temperature measuring probe 5 is sequentially connected with a temperature-resistant optical fiber, a temperature measuring signal connector, a temperature measuring decoding module, a digital signal processor and a wireless fire alarm automatic fire extinguishing system. The detection end of the temperature measuring probe 5 extends into the inside of the oil cylinder 2. There is a distance between the temperature measuring probe 5 and the piston 3. The heat-conducting oil pipe 1, the oil cylinder 2 and the circulation component are all filled with heat-conducting oil. During operation, the oil cylinder 2 and the circulation component are fixed outside the dry-type magnetically controlled reactor, and the heat-conducting oil pipe 1 penetrates into the dry-type magnetically controlled reactor and is wound around the outside of the winding in a snake shape. The circulation component is started to pump the heat-conducting oil to circulate inside the heat-conducting oil pipe 1, the oil cylinder 2 and the circulation component. The heat-conducting oil flowing in a cycle takes away the heat of the winding and transfers it to the temperature measuring probe 5. Since most of the heat-conducting oil pipe 1 is arranged outside the sealed dry-type magnetically controlled reactor, the heat loss of the heat-conducting oil pipe 1 is extremely small and can be basically ignored. The temperature signal monitored by the temperature measuring probe 5 is transmitted to the wireless fire alarm automatic fire extinguishing system along the optical fiber winding. Once the temperature of the heat-conducting oil is higher than 80 °C, it will gradually expand, and the piston 3 is pushed forward in the oil cylinder 2 to squeeze the compression spring 4, so as to relieve the pressure of the high-temperature heat-conducting oil and avoid the occurrence of pipe explosion and oil leakage, so as to continuously measure the temperature of the winding by using the heat-conducting oil.

[0024] Among them, the alarm fire extinguisher model adopted by the wireless fire alarm automatic fire extinguishing system is PFK-FH-CT, and the automatic fire extinguishing device model adopted is PFK-FH-ED. After receiving the high-temperature signal, the wireless fire alarm automatic fire extinguishing system starts the automatic fire extinguishing device to take fire extinguishing measures for the dry-type magnetically controlled reactor and extinguish the flame. The temperature grades of ordinary dry-type magnetically controlled reactors are shown in Table 1 below.

[0025] Table 1 Temperature grades of ordinary dry-type magnetically controlled reactors

[0026] Temperature grade Grade A Grade E Grade B Grade F Grade H Maximum allowable temperature (℃) 105 120 130 155 180

[0027] As Figure 1 and Figure 4 shown, the circulation component includes two shunt pipes 6 fixedly connected to the outside of the oil cylinder 2, and also includes an oil pump 7. The oil pump 7 is signal-connected to the wireless fire alarm automatic fire extinguishing system. The oil pump 7 can be a micro fountain pump of model DS3092, which is integrally plastic-coated and potted with epoxy resin, has an IP68 protection level, a maximum working voltage of 24V, and can be connected to the power supply connector outside the dry magnetic control reactor through a rectifier and a transformer. The output end of the oil pump 7 is fixedly connected to the port of one shunt pipe 6, and the liquid inlet end of the oil pump 7 is fixedly connected to the port of the other shunt pipe 6. Starting the oil pump 7 agitates the hydraulic oil to circulate along the two shunt pipes 6, the oil cylinder 2 and the heat conduction oil pipe 1. Moreover, the oil pump 7 is externally placed, less affected by the winding electric field, and has a plastic-coated layer to shield charges, avoiding the generation of electric arcs.

[0028] As Figure 1 、 Figure 2 and Figure 3 shown, a circular groove 8 adapted to the piston 3 is provided on the inner side of the oil cylinder 2. There are gaps between the circular groove 8 and the heat conduction oil pipe 1 and the shunt pipe 6. The circular groove 8 is used to guide the piston 3 to prevent the piston 3 from tilting, and can also limit the piston 3 to prevent the piston 3 from blocking the port of the heat conduction oil pipe 1.

[0029] As Figure 1 、 Figure 2 and Figure 3 shown, a partition 9 is fixedly arranged axially in the middle of the upper wall of the oil cylinder 2. The partition 9 separates the two ports of the heat conduction oil pipe 1, facilitating the two ports of the heat conduction oil pipe 1 to face the two shunt pipes 6 respectively, forming two chambers, which are respectively used for the discharge and return of the heat conduction oil, so that the circulation of the heat conduction oil proceeds orderly.

[0030] As Figure 1 and Figure 4 shown, a shielding cover 10 is fixed outside the oil pump 7. The shielding cover 10 can be made of asbestos or rock wool, which can reduce heat transfer for heat insulation. And the surface of the shielding cover 10 is coated with an electromagnetic wave shielding coating of a composite powder based on copper and silver. The surface of the shielding cover 10 has rounded corners to reduce the occurrence of tip discharge caused by sharp points. The shielding cover 10 can be concave or fully enclosed, separating the oil pump 7 and the dry magnetic control reactor, serving as an electromagnetic shielding layer outside the oil pump 7 to further improve the safety of the oil pump 7 during operation.

[0031] As Figure 1 and Figure 4As shown in the figure, a cooling fan 11 is fixed on the outer surface of the shielding cover 10. The signal of the cooling fan 11 is also connected to the wireless fire alarm automatic fire extinguishing system. The cooling fan 11 can be selected as the cooling fan of a computer mainframe and is mainly made of plastic. The air outlet of the cooling fan 11 faces the oil pump 7. During fire extinguishing, the cooling fan 11 can be started to blow air towards the oil pump 7 to dissipate heat from the oil pump 7 and the nearby heat-conducting oil, facilitating the cooling and contraction of the heat-conducting oil. And under the action of the compression spring 4, the piston 3 is pushed reversely to reset inside the oil cylinder 2.

[0032] The working principle of the present utility model is as follows: During operation, the oil cylinder 2 and the circulation component are fixed outside the dry-type magnetic control reactor. The heat-conducting oil pipe 1 penetrates into the dry-type magnetic control reactor and is wound around the outside of the winding in a serpentine shape. The circulation component is started to pump the heat-conducting oil to circulate inside the heat-conducting oil pipe 1, the oil cylinder 2 and the circulation component, and the heat of the winding is taken away by the circulating heat-conducting oil and transferred to the temperature measuring probe 5. Since most of the heat-conducting oil pipe 1 is arranged outside the sealed dry-type magnetic control reactor, the heat loss of the heat-conducting oil pipe 1 is extremely small and can be basically ignored.

[0033] Meanwhile, the temperature measuring probe 5 monitors the temperature signal and transmits it to the wireless fire alarm automatic fire extinguishing system along the optical fiber winding. Once the temperature of the heat-conducting oil is higher than 80 °C, it will gradually expand, and the piston 3 is pushed forward inside the oil cylinder 2 to compress the compression spring 4, which can relieve the pressure of the high-temperature heat-conducting oil and avoid the occurrence of pipe explosion and oil leakage, so as to continuously measure the temperature of the winding by using the heat-conducting oil.

[0034] The above is only the preferred embodiment of the present utility model. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present utility model, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present utility model. The structures, devices and operation methods not specifically described and explained in the present utility model are implemented by conventional means in the art without special description and limitation.

Claims

1. An optical fiber winding temperature measuring device suitable for a magnetron reactor, comprising a heat transfer oil pipe (1), characterized in that: The heat transfer oil pipe (1) is wavy in shape, and an oil cylinder (2) is connected and fixed between two ends of the heat transfer oil pipe (1). A piston (3) is axially inserted in the oil cylinder (2) at a position lower than the end of the heat transfer oil pipe (1). A compression spring (4) is fixed on the lower surface of the piston (3). The lower end of the compression spring (4) extends spirally along the axial direction of the piston (3) and is fixedly connected to the lower wall of the oil cylinder (2). A circulation component and a temperature measuring probe (5) are fixed at intervals on the outside of the oil cylinder (2). The detection end of the temperature measuring probe (5) extends into the interior of the oil cylinder (2), and a spacing is left between the temperature measuring probe (5) and the piston (3).

2. The optical fiber winding temperature measuring device applicable to a magnetically controlled reactor according to claim 1, characterized in that: The circulation component comprises two shunt pipes (6) connected and fixed to the outside of the oil cylinder (2), and also comprises an oil pump (7), wherein the output end of the oil pump (7) is connected and fixed to a port of one shunt pipe (6), and the liquid inlet end of the oil pump (7) is connected and fixed to a port of the other shunt pipe (6).

3. The optical fiber winding temperature measuring device applicable to a magnetically controlled reactor according to claim 2, characterized in that: A circular groove (8) adapted to the piston (3) is provided on the inner side of the oil cylinder (2), and a spacing is left between the circular groove (8) and the heat transfer oil pipe (1) and the diverter pipe (6).

4. The optical fiber winding temperature measuring device applicable to a magnetically controlled reactor according to claim 1, characterized in that: A partition plate (9) is axially fixed in the middle of the upper wall of the oil cylinder (2), and the partition plate (9) separates the two ends of the heat transfer oil pipe (1).

5. The optical fiber winding temperature measuring device applicable to a magnetically controlled reactor according to claim 2, characterized in that: A shielding cover (10) is fixed to the outside of the oil pump (7).

6. The optical fiber winding temperature measuring device applicable to a magnetically controlled reactor according to claim 5, characterized in that: A cooling fan (11) is fixed on the outer surface of the shielding cover (10), and an air outlet of the cooling fan (11) faces the oil pump (7).

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