Fiber bragg grating enclosed bus temperature measuring device

Abstract

The utility model provides a fiber bragg grating enclosed bus temperature measuring device, which comprises a grating, an acquisition fiber, a demodulator and an upper computer, the gratings are formed by packaging fiber grating sensors by using a glass ceramic shell, and the plurality of gratings are installed on the bus duct and are used for measuring the temperature of the bus duct; each acquisition optical fiber is connected with a plurality of gratings, and the acquisition optical fibers are in optical signal connection with the demodulator and are used for transmitting acquired temperature data signals to the demodulator; the demodulator is used for demodulating the temperature data signal to obtain temperature data; and the upper computer is connected with the demodulator and is used for receiving the temperature data obtained after demodulation. According to the device of the utility model, on one hand, the temperature is acquired through the grating packaged by the glass ceramic, and the purpose of insulating temperature measurement is realized; and meanwhile, signals are transmitted through optical fibers, so that the signal transmission process is non-conductive, the measurement in a high-voltage electrified environment is free of dangers such as short circuit, and dangers are prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of temperature measuring devices, in particular to an optical fiber grating enclosed busbar temperature measuring device. Background Art

[0002] Busbar trunkings are mostly used in scenarios with strict requirements for electrical safety, such as between transformers and cabinets, and the main lines in large-scale power consumption scenarios (such as smelting plants, automobile assembly lines, airport terminals, exhibition centers). Most electrical safety accidents are caused by poor contact points or overheating after overload. Therefore, on-line hot spot monitoring of electrical equipment is particularly important.

[0003] The existing busbar trunking temperature measuring solutions are roughly divided into the following two categories: 1. Thermal resistors, thermocouples, etc. based on electrical signals. Since the transmission lines of such electrical signals are conductors, there is a certain danger in measurement in a high-voltage live environment; 2. Indirect measurements based on infrared and surface acoustic waves. The equipment has poor stability and is prone to generating heat and becoming a heat source. Content of the Utility Model

[0004] The purpose of the utility model is to provide an optical fiber grating enclosed busbar temperature measuring device. On the one hand, the grating encapsulated by glass ceramics is used to collect temperature to achieve the purpose of insulated temperature measurement; at the same time, signals are transmitted through optical fibers so that no electricity is conducted during signal transmission, and there is no danger of short circuit during measurement in a high-voltage live environment, preventing danger from occurring. In order to achieve the above technical features, the purpose of the utility model is realized as follows:

[0005] An optical fiber grating enclosed busbar temperature measuring device includes a grating, a collecting optical fiber, a demodulator and a host computer;

[0006] The grating is encapsulated by a glass ceramic shell using an optical fiber grating sensor. A plurality of the gratings are installed on the busbar trunking for measuring the temperature of the busbar trunking;

[0007] Each collecting optical fiber is connected with a plurality of the gratings, and the collecting optical fiber is optically connected to the demodulator for transmitting the collected temperature data signal to the demodulator;

[0008] The demodulator is used for demodulating the temperature data signal to obtain temperature data;

[0009] The host computer is connected to the demodulator for receiving the temperature data obtained after demodulation.

[0010] It further includes a sealing cover, and the busbar trunking, the grating and the collecting optical fiber are located inside the sealing cover.

[0011] A flange penetrator is installed on the sealing cover. The two ends of the flange penetrator are respectively connected to the acquisition optical fiber and the connection optical fiber, and the connection optical fiber is connected to the demodulator.

[0012] The sealing cover includes a hollow shell and a cover door sealed to the shell. An installation hole is provided on the shell, and a mounting plate is installed on the shell at the edge of the installation hole. A connection hole is provided on the mounting plate, and the flange penetrator is installed on the connection hole.

[0013] A sealing ring is provided between the mounting plate and the shell.

[0014] A sealing washer is provided between the sealing ring and the mounting plate.

[0015] The grating is fixed on the surface of the busbar trough by means of bonding and winding with glass ribbon.

[0016] The utility model has the following beneficial effects:

[0017] 1. The temperature is collected by the grating encapsulated by glass ceramics to achieve the purpose of insulation temperature measurement; at the same time, the signal is transmitted through the optical fiber, so that the signal is non-conductive during the transmission process, and there is no danger of short circuit in the high-voltage live environment, preventing the occurrence of danger.

[0018] 2. The temperature is collected by the grating encapsulated by glass ceramics, and the signal is transmitted through the optical fiber, with good stability and no heat source.

[0019] 3. The grating is encapsulated by a glass ceramic shell used in an optical fiber grating sensor, which can not only protect the grating but also achieve the purpose of insulation temperature measurement. Description of the Drawings

[0020] The following further describes the utility model in conjunction with the drawings and embodiments.

[0021] Figure 1 is a schematic structural diagram of the connection between the grating and the busbar trough provided by the embodiment of the utility model;

[0022] Figure 2 is a schematic structural diagram of the flange penetrator provided by the embodiment of the utility model;

[0023] Figure 3 is a schematic structural diagram of the mounting plate provided by the embodiment of the utility model;

[0024] Figure 4 is a schematic structural diagram of the sealing ring and the sealing washer provided by the embodiment of the utility model;

[0025] Figure 5 is a schematic structural diagram of the sealing cover provided by the embodiment of the utility model;

[0026] Figure 6 It is a schematic diagram of the structure inside the sealing cover provided by the embodiment of the present utility model;

[0027] Figure 7 It is a schematic diagram of the connection structure between the mounting plate and the sealing cover provided by the embodiment of the present utility model;

[0028] Figure 8 It is an isometric view of the connection structure between the mounting plate and the sealing cover provided by the embodiment of the present utility model when the cover door is in the open state;

[0029] Figure 9 It is a bottom view of the connection structure between the mounting plate and the sealing cover provided by the embodiment of the present utility model when the cover door is in the open state;

[0030] Figure 10 It is a top view of the connection structure between the mounting plate and the sealing cover provided by the embodiment of the present utility model when the cover door is in the open state;

[0031] In the figure: grating 1, busbar trunking 2, acquisition optical fiber 3, glass ribbon 4, sealing cover 5, housing 51, mounting hole 511, wire passing hole 512, first fixation 513, cover door 52, flange penetrator 6, flange 61, shaft section 62, connection thread 621, first socket 63, second socket 64, mounting plate 7, second fixing hole 71, connection hole 72, third fixing hole 73, sealing ring 8, fourth fixing hole 81, sealing washer 9, connection optical fiber 10. Specific embodiments

[0032] The following further describes the embodiments of the present utility model with reference to the accompanying drawings.

[0033] Refer to the attached Figure 1-10 In order to achieve the above technical features, the object of the present utility model is achieved as follows:

[0034] An optical fiber grating enclosed busbar temperature measurement device includes a grating 1, an acquisition optical fiber 3, a demodulator, and a host computer; the grating 1 is encapsulated by a glass-ceramic shell using an optical fiber grating sensor, and a plurality of gratings 1 are installed on the busbar trunking 2 for measuring the temperature of the busbar trunking 2; each acquisition optical fiber 3 is connected with a plurality of gratings 1, and the acquisition optical fiber 3 is optically connected to the demodulator for transmitting the acquired temperature data signal to the demodulator; the demodulator is used for demodulating the temperature data signal to obtain temperature data; the host computer is connected to the demodulator for receiving the temperature data obtained after demodulation.

[0035] The device of the present utility model includes a grating 1 and a collecting optical fiber 3; on the one hand, the temperature is collected by the grating encapsulated by glass-ceramics to achieve the purpose of insulating temperature measurement; at the same time, the signal is transmitted through the optical fiber so that it is non-conductive during the signal transmission process, and there is no danger of short circuit in the measurement in a high-voltage live environment, preventing danger from occurring.

[0036] In some embodiments, it further includes a sealing cover 5, and the busbar trunking 2, the grating 1 and the collecting optical fiber 3 are located inside the sealing cover.

[0037] In some embodiments, a flange penetrator 6 is installed on the sealing cover 5. The two ends of the flange penetrator 6 are respectively connected to the collecting optical fiber 3 and the connecting optical fiber 10, and the connecting optical fiber 10 is connected to the demodulator.

[0038] In some embodiments, the sealing cover 5 includes a hollow shell 51 and a cover door 52 sealingly connected to the shell 51. An installation hole 511 is provided on the shell 51. The mounting plate 7 is installed on the shell 51 at the edge of the installation hole 511. A connection hole 72 is provided on the mounting plate 7, and the flange penetrator 6 is installed on the connection hole 72. There are 16 connection holes 72 in the middle of the mounting plate 7 for fixedly connecting with the flange penetrator 6. The front side of the shell 51 has a cover door 52, and the cover door 52 is sealingly connected to the shell 51 to protect the safety of the internal structure of the sealing cover 5 and play a role in dust and water prevention. An installation hole 511 is provided in the middle of the rear side of the shell 51. The installation hole 511 is a rectangular opening for placing the mounting plate 7. The shell 51 is provided with 12 first fixing holes 513 around the installation hole 511, and the mounting plate 7 is provided with 12 second fixing holes 71. The mounting plate 7 is connected to the shell 51 by bolts passing through the first fixing holes 513 and the second fixing holes 71 and connecting with nuts for fastening.

[0039] In some embodiments, the flange penetrator 6 includes a flange 61 and a shaft section 62. The flange 61 is located on the shaft section 62. A connection thread 621 is provided on the shaft section 62. The connection hole 72 is a threaded hole, and the connection thread 621 is connected to the connection hole 72. The shaft section 62 is respectively provided with a first insertion interface 63 and a second insertion interface 64. The first insertion interface 63 is inserted into the collecting optical fiber 3, and the second insertion interface 64 is inserted into the connecting optical fiber 10. The two ends of the flange penetrator 6 are FC-type flange 61 disks, and the inner side end of the flange 61 disk has a connection thread 621 for threaded fixation with the mounting plate 7. One end of the shaft section 62 is connected to the collecting optical fiber 3 for temperature measurement inside the enclosed busbar trunking 2, and the other end is connected to the connecting optical fiber 10 for insertion into the demodulator to achieve the purpose of convenient replacement.

[0040] In some embodiments, a sealing ring 8 is further included. The sealing ring 8 is connected to the mounting plate 7 and is located between the mounting plate 7 and the housing 51. There are 4 third fixing holes 73 on the mounting plate 7 that are fixed to the sealing ring 8. There are 4 fourth fixing holes 81 on the sealing ring 8. Bolts pass through the third fixing holes 73 and the fourth fixing holes 81 and are connected and fastened with nuts to realize the connection between the sealing ring 8 and the mounting plate 7.

[0041] In some embodiments, a sealing washer 9 is further included. The sealing washer 9 is disposed on the sealing ring 8 and is located between the sealing ring 8 and the mounting plate 7. The sealing ring 8 has 4 hole positions for fixing to the mounting plate 7. There is a rubber O-ring sealing washer 9 in the middle of the sealing ring 8 to ensure that there is no gas leakage between the sealing ring 8 and the mounting plate 7.

[0042] In some embodiments, a wire passing hole 512 is provided on the housing 51. The connecting optical fiber 10 passes through the mounting hole 511 and the wire passing hole 512. There is one wire passing hole 512 at the bottom of the housing 51. The wire passing hole 512 is a circular opening for realizing the routing of the connecting optical fiber 10 to be connected to the demodulator.

[0043] In some embodiments, the grating 1 is fixed on the surface of the busbar trunking 2 by bonding and winding with a glass ribbon 4. The grating 1 is fixed on the surface of the busbar trunking 2 using a temperature-resistant epoxy glue, and the grating sensor is wound and fixed using the glass ribbon 4 to realize a dual fixing method, improving stability and reliability.

[0044] In some embodiments, each acquisition optical fiber 3 is connected to 40 gratings 1, and 16 acquisition optical fibers 3 are provided to realize 16-channel temperature measurement.

[0045] In some embodiments, the demodulator has a total of 16 channels and uses an 80nm broadband light source to realize multi-channel and multi-sensor demodulation.

[0046] In some embodiments, the host computer is connected to the demodulator through a network cable to realize the functions of temperature display and alarm. When the temperature exceeds the preset threshold, an alarm is given, which can be through sound or light, or both sound and light simultaneously.

Claims

1. A fiber Bragg grating enclosed busbar temperature measurement device, characterized in that: Including grating, collection optical fiber, demodulator and host computer; The grating is formed by encapsulating a fiber grating sensor in a glass ceramic housing, and a plurality of the gratings are installed on the bus duct to measure the temperature of the bus duct; Each of the collection optical fibers is connected to a plurality of the gratings, and the collection optical fibers are connected to the demodulator optical signal to transmit the collected temperature data signal to the demodulator; The demodulator is used to demodulate the temperature data signal to obtain temperature data; The host computer is connected to the demodulator and is used to receive the temperature data obtained after demodulation.

2. The fiber Bragg grating enclosed busbar temperature measuring device according to claim 1, characterized in that: It also includes a sealing cover, in which the bus duct, the grating and the collection optical fiber are located.

3. The fiber Bragg grating enclosed busbar temperature measuring device according to claim 2, characterized in that: A flange through-hole is installed on the sealing cover, and two ends of the flange through-hole are respectively connected to the collection optical fiber and the connecting optical fiber, and the connecting optical fiber is connected to the demodulator.

4. The fiber Bragg grating enclosed busbar temperature measuring device according to claim 3, characterized in that: The sealing cover includes a shell with a hollow interior and a cover door sealed with the shell. The shell is provided with a mounting hole, a mounting plate is mounted on the shell at the edge of the mounting hole, a connecting hole is provided on the mounting plate, and the flange through-device is mounted on the connecting hole.

5. The fiber Bragg grating enclosed busbar temperature measuring device according to claim 4, characterized in that: A sealing ring is provided between the mounting plate and the housing.

6. The fiber Bragg grating enclosed busbar temperature measuring device according to claim 5, characterized in that: A sealing gasket is provided between the sealing ring and the mounting plate.

7. The fiber Bragg grating enclosed busbar temperature measuring device according to claim 6, characterized in that: The grating is fixed on the surface of the bus duct by bonding and winding with a glass ribbon.

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