Generator stator bar optical fiber temperature measuring device easy to replace and use method thereof

Abstract

The invention discloses a generator stator bar optical fiber temperature measuring device easy to replace and a use method thereof. The device comprises a connector, a transmission optical cable and a sheath. The connector comprises a first wire locking device, a second wire locking device and a connecting pipe, the first wire locking device is connected with the sheath, the sheath is inserted into the filler strip, and one end, comprising a grating temperature sensor, of the transmission optical cable is inserted into the sheath; during application, fixation of the first wire locking device, the second wire locking device and the connecting pipe is removed, the transmission optical cable is pulled out, then a new transmission optical cable penetrates through the first wire locking device, the second wire locking device and the connecting pipe to be inserted into the sheath, and then the first wire locking device, the second wire locking device and the connecting pipe are sequentially fixed, so that the transmission optical cable is fixed. The grating temperature sensor is good in electromagnetic interference resistance, so that the temperature monitoring precision is high; the fixing releasing and fixing effects can be achieved only by disassembling, assembling and fixing the first wire locking device, the second wire locking device and the connecting pipe, and therefore replacement is convenient. Therefore, according to the design, the temperature monitoring precision is high, and replacement is convenient.

Description

Technical Field

[0001] The invention relates to an optical fiber temperature measuring device, belonging to the technical field of temperature measurement of generator stator wire rods, and in particular to an optical fiber temperature measuring device of a generator stator wire rod that is easy to replace and a use method thereof. Background Art

[0002] In recent years, with the rapid growth of domestic electricity demand, the stability and safety of the power system have become increasingly important. As the core equipment of power supply, the safe and reliable operation of the generator is directly related to the normal operation of the entire power system. Among the many factors that affect the safe operation of the generator, the thermal failure caused by the stator system is particularly prominent. Therefore, it is of great significance to monitor the temperature of the generator stator bar in real time.

[0003] A Chinese patent application with application number 201620147958.8 and application date of February 27, 2016 discloses a high-reliability stator temperature sensor for a large turbine, including a sensor probe and a wiring device, wherein the sensor probe includes a connection seat, a protective sleeve, a platinum thermal resistor, a first wire and a second wire; a first electrode and a second electrode are provided at the rear end of the connection seat; the rear end of the protective sleeve is fixedly connected to the front end of the connection seat; the platinum thermal resistor is arranged in the protective sleeve; one end of the first wire and the second wire extends into the protective sleeve and is connected to the platinum thermal resistor, and the other end extends from the rear end of the protective sleeve and passes through the connection seat to be electrically connected to the first electrode and the second electrode respectively; the wiring device includes a connector, a connecting pipe and a junction box, one end of the connector is threadedly connected to the rear end of the connection seat, the one end of the connector has a first elastic contact and a second elastic contact in electrical contact with the first electrode and the second electrode respectively, and the other end is connected to the junction box through the connecting pipe. Although this design can detect the temperature of the wire rod through the platinum thermal resistor, it still has the following defects: The platinum thermistor designed in this way will be subject to greater interference in a high voltage and strong electromagnetic environment, resulting in lower accuracy of temperature monitoring by the platinum thermistor.

[0004] The information disclosed in this background technology section is only intended to increase the understanding of the overall background of the application, and should not be regarded as acknowledging or suggesting in any form that the information constitutes the prior art already known to ordinary technicians in this field. Summary of the invention

[0005] The purpose of the present invention is to overcome the defects and problems of low temperature monitoring accuracy in the prior art, and to provide a generator stator wire rod optical fiber temperature measuring device with high temperature monitoring accuracy and easy to replace, and a method for using the same.

[0006] To achieve the above objectives, the technical solution of the present invention is: An easily replaceable generator stator wire rod optical fiber temperature measuring device, the device comprising a connector, a transmission optical cable and a sheath; The connector includes a first wire locker, a second wire locker and a connecting tube, the middle part of the connecting tube is a connecting cavity, the connecting cavity passes through the connecting tube along the axis of the connecting tube, one end of the connecting cavity is a first connecting part, the other end of the connecting cavity is a second connecting part, a second clamping end of the second wire locker is inserted into the second connecting part, the outer surface of the middle part of the second clamping end is a second threaded end, the second threaded end is threadedly connected to the second connecting part, the middle part of the second clamping end is a second wire hole, the second wire hole is connected to one end of the second connecting part, the front part of the second clamping end is a plurality of second clamping blocks, the second clamping blocks The movement stroke is to move toward the second wire through hole and move away from the second wire through hole; a first clamping end of a first wire lock is inserted in the first connecting part, an outer surface of a middle part of the first clamping end is a first threaded end, the first threaded end is threadedly connected to the first connecting part, the middle part of the first clamping end is a first wire through hole, the first wire through hole is connected to one end of the first connecting part, the front part of the first clamping end is a plurality of first clamping blocks, and the movement stroke of the first clamping block is to move toward the first wire through hole and move away from the first wire through hole; an end of the first wire lock away from the first clamping end is the first connecting end; One end of the first connecting end away from the first pressing end is connected to one end of the sheath, and the outer surface of the other end of the sheath is fixedly connected to the groove, and the groove is located on the pad between the layers of the generator stator wire rods. The measuring end of the transmission optical cable is inserted into the sheath, and a grating temperature sensor is arranged on the measuring end; the end of the transmission optical cable away from the measuring end is the transmission end, and the first wire hole and the second wire hole are sequentially covered on the outside of the transmission end.

[0007] The second connecting portion includes a second threaded cavity and a second conical cavity. The second threaded cavity is threadedly connected to the second threaded end. The second conical cavity is conical. The diameter of the second conical cavity gradually decreases in the direction away from the second threaded cavity. The diameter of the second conical cavity away from one end of the second threaded cavity is smaller than the diameter of the second clamping block away from the second threaded end. The inner surface of the second conical cavity is slidably connected to the outer surface of the second clamping block.

[0008] The first connecting portion includes a first threaded cavity and a first conical cavity. The first threaded cavity is threadedly connected to the first threaded end. The first conical cavity is conical. The diameter of the first conical cavity gradually decreases in the direction away from the first threaded cavity. The diameter of the first conical cavity away from one end of the first threaded cavity is smaller than the diameter of the first clamping block away from the first threaded end. The inner surface of the first conical cavity is slidably connected to the outer surface of the first clamping block.

[0009] The interior of the transmission optical cable is a transmission optical fiber, a grating temperature sensor is arranged on the measuring end of the transmission optical fiber, and a fixing point is arranged on the side of the grating temperature sensor close to the first connecting part.

[0010] The outer surface of the sheath is connected to one side of the epoxy resin glue, and the other side of the epoxy resin glue is connected to the inner surface of the groove; the bottom of the groove and the bottom of the cushion strip are located at the same height.

[0011] The width of the groove is five to seven millimeters, and the depth of the groove is four to six millimeters.

[0012] The outer diameter of the sheath is 2 to 2.1 mm, and the inner diameter of the sheath is 1.3 to 1.5 mm.

[0013] The outer diameter of the transmission optical cable is 1.1 to 1.2 millimeters, and the inner diameter of the transmission optical cable is 0.9 to 1 millimeter.

[0014] The material of the sheath is polyetheretherketone, polytetrafluoroethylene, ethylene-tetrafluoroethylene copolymer or imide; the material of the pad is epoxy resin.

[0015] A method for using an easily replaceable generator stator wire rod optical fiber temperature measuring device, the method comprising the following steps: Step 1: First confirm whether the grating temperature sensor needs to be replaced. If the grating temperature sensor needs to be replaced, loosen the second threaded end from the second connection part. At this time, the second clamping block moves away from the second wire hole, so the diameter of the second wire hole becomes larger, and the diameter of the second wire hole is larger than the outer diameter of the transmission optical cable. Then loosen the first threaded end from the first connection part. At this time, the first clamping block moves away from the first wire hole, so the diameter of the first wire hole becomes larger, and the diameter of the first wire hole is larger than the outer diameter of the transmission optical cable. Step 2: First move the transmission end away from the sheath, and then drive the measuring end through the sheath, the first through hole, and the second through hole in sequence, until the measuring end is located outside the second through hole; then insert the measuring end of the new transmission optical cable into the second through hole, the first through hole, and the sheath in sequence, until the new measuring end is located within the specified depth of the sheath; Step 3: First tighten the first threaded end and the first connecting part. At this time, the first clamping block moves toward the first wire hole under the clamping action of the first connecting part, so the first clamping block clamps the end of the transmission end connected to the first clamping block to achieve the first fixation of the transmission end. At the same time, the diameter of the first wire hole becomes smaller; then tighten the second threaded end and the second connecting part. At this time, the second clamping block moves toward the second wire hole under the clamping action of the second connecting part. Therefore, the second clamping block clamps the end of the transmission end connected to the second clamping block to achieve the second fixation of the transmission end. At the same time, the diameter of the second wire hole becomes smaller.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. In the present invention, an easily replaceable generator stator wire rod optical fiber temperature measuring device and its use method, the device includes a connector, a transmission optical cable and a sheath, the connector includes a first wire lock, a second wire lock and a connecting tube, the connecting tube includes a first connecting part and a second connecting part, the second wire lock includes a second threaded end, a second clamping block and a second wire through hole, the first wire lock includes a first threaded end, a first clamping block, a first wire through hole and a first connecting end, the first connecting end is connected to one end of the sheath, and the other end of the sheath is located in a groove on the cushion strip, the transmission optical cable passes through the second wire through hole and the first wire through hole in sequence and then is inserted into the sheath, a grating temperature sensor is arranged on one end of the transmission optical cable located in the sheath, and when it is used, when the transmission optical cable needs to be replaced, the second threaded end is first removed from the second connecting part The first threaded end is loosened from the first connecting portion, at which time the second clamping block is away from the transmission optical cable, and the transmission optical cable can move in the second wire hole, and then the first threaded end is loosened from the first connecting portion, at which time the first clamping block is away from the transmission optical cable, and the transmission optical cable can move in the first wire hole, and then the transmission optical cable is sequentially pulled out from the second wire hole and the first wire hole, and then a new transmission optical cable is sequentially inserted into the second wire hole and the first wire hole until the grating temperature sensor is located in the specified position of the sheath, and then the first threaded end is tightened from the first connecting portion, at which time the first clamping block moves toward the transmission optical cable to compress the transmission optical cable, and the transmission optical cable is fixed in the first wire hole, and then the second threaded end is tightened from the second connecting portion, at which time the second clamping block moves toward the transmission optical cable to compress the transmission optical cable, and the transmission optical cable is fixed in the second wire hole. The advantages of the present invention also include: First point: the present invention uses a grating temperature sensor to monitor the temperature of the stator wire rod. The grating temperature sensor is not interfered by high voltage and strong electromagnetic environment, so the grating temperature sensor has a higher accuracy in monitoring the temperature of the stator wire rod; Second point: When the grating temperature sensor is damaged or needs to be repaired, the first and second threaded ends can be loosened to make the first and second pressing blocks away from the transmission optical cable, and then the sensing optical cable is pulled out from the sheath, the first and second wire holes, and then the new transmission optical cable is inserted into the second wire hole, the first wire hole and the sheath in sequence, and then the first and second threaded ends are tightened to make the first and second pressing blocks press the transmission optical cable to fix the new transmission optical cable; the transmission optical cable can be replaced manually without using other tools, so the replacement is convenient; Third point: In the prior art, when replacing the temperature sensor, the sensor and the gasket need to be removed as a whole, and the gasket is fixed to the stator wire bar, so the stator wire bar needs to be removed before the gasket is removed, which will affect the structure of the stator wire bar during replacement; while in the present invention, the grating temperature sensor can be replaced without removing the gasket, which has no effect on the structure of the stator wire bar, so the present invention has better adaptability to the stator wire bar; Fourth point: the present invention fixes the transmission optical cable twice by using the first wire locker and the second wire locker, so the fixing effect of the transmission optical cable is better; Therefore, the temperature monitoring of the present invention has high accuracy and is easy to replace.

[0017] 2. In the present invention, an easily replaceable generator stator wire rod optical fiber temperature measuring device and its use method, the interior of the transmission optical cable is a transmission optical fiber, and a grating temperature sensor is arranged on one end of the transmission optical fiber located in the sheath, and a fixed point is arranged on one side of the grating temperature sensor. When used, the temperature of the stator wire rod is successively transmitted to the transmission optical cable through the pad, epoxy resin glue, and sheath, and then the transmission optical cable transmits the temperature to the grating temperature sensor, and then the grating temperature sensor converts the temperature change into an optical signal, and then transmits the optical signal to the demodulator, and then the demodulator analyzes the wavelength of the optical signal to obtain temperature information; one side of the grating temperature sensor is fixed to the fixed point by glue, and the other end is free to relax. This structure can make the grating temperature sensor effectively shield the influence of external strain, solve the problem of simultaneous sensitive cross-strain of the grating temperature sensor, and improve the anti-interference performance of the grating temperature sensor. Therefore, the anti-interference performance of the present invention is good.

[0018] 3. In the easily replaceable generator stator wire rod optical fiber temperature measuring device and its use method of the present invention, the width of the groove is 5 to 7 mm and the depth is 4 to 6 mm; the outer diameter of the sheath is 2 to 2.1 mm and the inner diameter is 1.3 to 1.5 mm; the outer diameter of the transmission optical cable is 1.1 to 1.2 mm and the inner diameter is 0.9 to 1 mm; the material of the sheath is polyetheretherketone, polytetrafluoroethylene, ethylene-tetrafluoroethylene copolymer or imide; the material of the pad is epoxy resin, and when used, the outer diameter of the sensing optical cable is slightly smaller than the inner diameter of the sheath, so the sensing optical cable can be smoothly inserted into the sheath; the pad fixes the sheath, and both the pad and the sheath have good thermal conductivity, which can quickly transfer the temperature to the transmission optical cable, and the pad and the sheath form a protection for the transmission optical cable, ensuring the stable operation of the grating temperature sensor. Therefore, the stability of the present invention is relatively high. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the present invention.

[0020] Figure 2 yes Figure 1 Schematic diagram of the structure of the middle pad.

[0021] Figure 3 yes Figure 1 Schematic diagram of the structure of the connecting pipe.

[0022] Figure 4 yes Figure 3 Schematic diagram of the structure of the first wire locker.

[0023] Figure 5 yes Figure 4 Right view of .

[0024] Figure 6 yes Figure 3 Schematic diagram of the structure of the second wire locker.

[0025] Figure 7 yes Figure 6 Left view of .

[0026] Figure 8 yes Figure 3 Schematic diagram of the structure of the middle connecting cavity.

[0027] Fig. 9 yes Figure 8 Right view of .

[0028] Fig.10 It is a schematic diagram of the structure in which the first wire lock and the second wire lock in Example 1 are loosened and no transmission optical cable is inserted.

[0029] Fig.11 It is a schematic diagram of the structure in which the first wire locker and the second wire locker in Example 1 are loosened and inserted into the transmission optical cable.

[0030] Fig.12 It is a schematic diagram of the structure of tightening the first wire lock and the second wire lock to fix the transmission optical cable in Example 1.

[0031] Fig.13 yes Figure 2 Schematic diagram of the structure of the middle groove.

[0032] Fig.14 It is a schematic diagram of the application of the present invention.

[0033] In the figure: connector 1, first wire locker 11, first clamping end 111, first threaded end 112, first wire hole 113, first clamping block 114, first connecting end 115, second wire locker 12, second clamping end 121, second threaded end 122, second wire hole 123, second clamping block 124, connecting tube 13, connecting cavity 131, first connecting part 132, second connecting part 133, second threaded cavity 134, second conical cavity 135, first threaded cavity 136, first conical cavity 137, transmission optical cable 2, measuring end 21, grating temperature sensor 211, transmission end 22, transmission optical fiber 23, fixing point 24, sheath 3, epoxy resin glue 31, pad 4, groove 41, demodulator 5. DETAILED DESCRIPTION

[0034] The present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0035] See also Figure 1 — Fig.14 , an easily replaceable generator stator wire rod optical fiber temperature measuring device, the device comprises a connector 1, a transmission optical cable 2 and a sheath 3; The connector 1 includes a first wire locker 11, a second wire locker 12 and a connecting tube 13, the middle part of the connecting tube 13 is a connecting cavity 131, the connecting cavity 131 passes through the connecting tube 13 along the axis of the connecting tube 13, one end of the connecting cavity 131 is a first connecting portion 132, the other end of the connecting cavity 131 is a second connecting portion 133, a second clamping end 121 of the second wire locker 12 is inserted into the second connecting portion 133, the outer surface of the middle part of the second clamping end 121 is a second threaded end 122, the second threaded end 122 is threadedly connected to the second connecting portion 133, the middle part of the second clamping end 121 is a second wire hole 123, the second wire hole 123 is connected to one end of the second connecting portion 133, the front part of the second clamping end 121 is a plurality of second clamping blocks 124, the second clamping The movement stroke of the tightening block 124 is to move toward the second wire hole 123 and to move away from the second wire hole 123; the first clamping end 111 of the first wire locker 11 is inserted into the first connecting portion 132, the outer surface of the middle part of the first clamping end 111 is the first threaded end 112, the first threaded end 112 is threadedly connected to the first connecting portion 132, the middle part of the first clamping end 111 is the first wire hole 113, the first wire hole 113 is connected to one end of the first connecting portion 132, the front part of the first clamping end 111 is a plurality of first clamping blocks 114, the movement stroke of the first clamping block 114 is to move toward the first wire hole 113 and to move away from the first wire hole 113; the end of the first wire locker 11 away from the first clamping end 111 is the first connecting end 115; One end of the first connecting end 115 away from the first clamping end 111 is connected to one end of the sheath 3, and the outer surface of the other end of the sheath 3 is fixedly connected to the groove 41. The groove 41 is located on the pad 4 between the layers of the generator stator wire rods. The measuring end 21 of the transmission optical cable 2 is inserted into the sheath 3, and a grating temperature sensor 211 is arranged on the measuring end 21; the end of the transmission optical cable 2 away from the measuring end is the transmission end 22, and the transmission end 22 is sequentially covered with a first wire hole 113 and a second wire hole 123.

[0036] The second connecting portion 133 includes a second threaded cavity 134 and a second conical cavity 135. The second threaded cavity 134 is threadedly connected to the second threaded end 122. The second conical cavity 135 is conical. The diameter of the second conical cavity 135 gradually decreases in the direction away from the second threaded cavity 134. The diameter of the second conical cavity 135 away from the second threaded cavity 134 is smaller than the diameter of the second clamping block 124 away from the second threaded end 122. The inner surface of the second conical cavity 135 is slidably connected to the outer surface of the second clamping block 124.

[0037] The first connecting portion 132 includes a first threaded cavity 136 and a first conical cavity 137. The first threaded cavity 136 is threadedly connected to the first threaded end 112. The first conical cavity 137 is conical. The diameter of the first conical cavity 137 gradually decreases in the direction away from the first threaded cavity 136. The diameter of the first conical cavity 137 away from the first threaded cavity 136 is smaller than the diameter of the first clamping block 114 away from the first threaded end 112. The inner surface of the first conical cavity 137 is slidably connected to the outer surface of the first clamping block 114.

[0038] The transmission optical cable 2 has a transmission optical fiber 23 inside. A grating temperature sensor 211 is disposed on the measuring end of the transmission optical fiber 23 . A fixing point 24 is disposed on one side of the grating temperature sensor 211 close to the first connecting portion 132 .

[0039] The outer surface of the sheath 3 is connected to one side of the epoxy resin glue 31 , and the other side of the epoxy resin glue 31 is connected to the inner surface of the groove 41 ; the bottom of the groove 41 and the bottom of the cushion strip 4 are located at the same height.

[0040] The width of the groove 41 is 5 to 7 millimeters, and the depth of the groove 41 is 4 to 6 millimeters.

[0041] The outer diameter of the sheath 3 is 2 to 2.1 mm, and the inner diameter of the sheath 3 is 1.3 to 1.5 mm.

[0042] The outer diameter of the transmission optical cable 2 is 1.1 to 1.2 millimeters, and the inner diameter of the transmission optical cable 2 is 0.9 to 1 millimeter.

[0043] The material of the sheath 3 is polyetheretherketone, polytetrafluoroethylene, ethylene-tetrafluoroethylene copolymer or imide; the material of the gasket strip 4 is epoxy resin.

[0044] A method for using an easily replaceable generator stator wire rod optical fiber temperature measuring device, the method comprising the following steps: Step 1: First confirm whether the grating temperature sensor 211 needs to be replaced. If the grating temperature sensor 211 needs to be replaced, loosen the second threaded end 122 from the second connecting portion 133. At this time, the second clamping block 124 moves away from the second wire hole 123, so the diameter of the second wire hole 123 becomes larger, and the diameter of the second wire hole 123 is larger than the outer diameter of the transmission optical cable 2. Then loosen the first threaded end 112 from the first connecting portion 132. At this time, the first clamping block 114 moves away from the first wire hole 113, so the diameter of the first wire hole 113 becomes larger, and the diameter of the first wire hole 113 is larger than the outer diameter of the transmission optical cable 2. Step 2: first move the transmission end 22 away from the sheath 3, and then drive the measuring end 21 through the sheath 3, the first wire hole 113, and the second wire hole 123 in sequence by the transmission end 22, until the measuring end 21 is located outside the second wire hole 123; then insert the measuring end 21 of the new transmission optical cable 2 into the second wire hole 123, the first wire hole 113, and the sheath 3 in sequence, until the new measuring end 21 is located within the specified depth of the sheath 3; Step 3: First tighten the first threaded end 112 and the first connecting part 132. At this time, the first clamping block 114 moves toward the first wire hole 113 under the clamping action of the first connecting part 132, so the first clamping block 114 clamps the end of the transmission end 22 connected to the first clamping block 114 to achieve the first fixation of the transmission end 22. At the same time, the diameter of the first wire hole 113 becomes smaller; then tighten the second threaded end 122 and the second connecting part 133. At this time, the second clamping block 124 moves toward the second wire hole 123 under the clamping action of the second connecting part 133, so the second clamping block 124 clamps the end of the transmission end 22 connected to the second clamping block 124 to achieve the second fixation of the transmission end 22. At the same time, the diameter of the second wire hole 123 becomes smaller.

[0045] The supplementary description of the present invention is as follows: The thermal failure caused by the stator system described in the present invention is as follows: the potential distribution of the stator wire bar is very complex, and the thermal stress is easily concentrated; as the rated voltage of the generator set increases, the current at the end of the stator wire bar increases accordingly, resulting in a continuous increase in the heating rate in this area, thereby causing the temperature to rise; this continuous temperature rise may cause the stator wire bar to overheat and burn, and even cause serious damage to the entire generator set; therefore, the stator wire bar must be effectively temperature monitored to ensure that it operates within a safe temperature range and to ensure the safe and stable operation of the generator set.

[0046] The pre-application scenario of the present invention is: please refer to Fig.14 When the generator is produced, the gasket 4 is pre-placed between the layers of the stator wire rods. After the generator is produced, the transmission optical cable 2 is placed in the sheath 3 through the connector 1. After the generator is put into operation, when the transmission optical cable 2 needs to be replaced, there is no need to remove the stator wire rods. The first wire locker 11, the second wire locker 12 and the connecting tube 13 can be disassembled, connected and fixed to directly replace the transmission optical cable 2. After replacement, the temperature measurement performance and usage habits remain unchanged. Since there is no need to remove the stator wire rods, a large amount of economic cost is saved, and the gasket 4 has the same structure as the original interlayer gasket in the stator wire rods, so it can adapt to the special environment of the stator wire rods.

[0047] Embodiment 1: See also Figure 1 — Fig.14, an easily replaceable generator stator wire rod optical fiber temperature measuring device, the device comprises a connector 1, a transmission optical cable 2 and a sheath 3; the connector 1 comprises a first wire locker 11, a second wire locker 12 and a connecting tube 13, the middle part of the connecting tube 13 is a connecting cavity 131, the connecting cavity 131 passes through the connecting tube 13 along the axis of the connecting tube 13, one end of the connecting cavity 131 is a first connecting part 132, the other end of the connecting cavity 131 is a second connecting part 133, the second connecting part 133 is inserted with the second pressing end 121 of the second wire locker 12, the first connecting part 132 is inserted with the second pressing end 121 of the second wire locker 12, the second ... The outer surface of the middle part of the second clamping end 121 is a second threaded end 122, and the second threaded end 122 is threadedly connected to the second connecting portion 133. The middle part of the second clamping end 121 is a second wire hole 123, and the second wire hole 123 is connected to one end of the second connecting portion 133. The front part of the second clamping end 121 is a plurality of second clamping blocks 124, and the movement stroke of the second clamping blocks 124 is moving toward the second wire hole 123 and moving away from the second wire hole 123. The first connecting portion 132 is inserted with a first clamping block 11 of the first wire lock. The first clamping end 111 has a first threaded end 112 at its middle portion, the first threaded end 112 is threadedly connected to the first connecting portion 132, the first clamping end 111 has a first wire hole 113 at its middle portion, the first wire hole 113 is connected to one end of the first connecting portion 132, the first clamping end 111 has a plurality of first clamping blocks 114 at its front portion, the first clamping blocks 114 have a movement range of moving toward and away from the first wire hole 113; the first wire locker 111 is away from the first clamping end 111. One end of the end 111 is a first connecting end 115; the end of the first connecting end 115 away from the first clamping end 111 is connected to one end of the sheath 3, the outer surface of the other end of the sheath 3 is fixedly connected to the groove 41, the groove 41 is located on the pad 4 between the layers of the generator stator wire rods, the measuring end 21 of the transmission optical cable 2 is inserted into the sheath 3, and the measuring end 21 is provided with a grating temperature sensor 211; the end of the transmission optical cable 2 away from the measuring end is the transmission end 22, and the transmission end 22 is sequentially covered with a first wire hole 113 and a second wire hole 123. The second connecting portion 133 includes a second threaded cavity 134 and a second conical cavity 135. The second threaded cavity 134 is threadedly connected to the second threaded end 122. The second conical cavity 135 is conical. The diameter of the second conical cavity 135 gradually decreases in the direction away from the second threaded cavity 134. The diameter of the second conical cavity 135 away from the second threaded cavity 134 is smaller than the diameter of the second clamping block 124 away from the second threaded end 122. The inner surface of the second conical cavity 135 is slidably connected to the outer surface of the second clamping block 124.The first connecting portion 132 includes a first threaded cavity 136 and a first conical cavity 137. The first threaded cavity 136 is threadedly connected to the first threaded end 112. The first conical cavity 137 is conical. The diameter of the first conical cavity 137 gradually decreases in the direction away from the first threaded cavity 136. The diameter of the first conical cavity 137 away from the first threaded cavity 136 is smaller than the diameter of the first clamping block 114 away from the first threaded end 112. The inner surface of the first conical cavity 137 is slidably connected to the outer surface of the first clamping block 114.

[0048] A method for using an easily replaceable generator stator wire rod optical fiber temperature measuring device, the method comprising the following steps: Step 1: First confirm whether the grating temperature sensor 211 needs to be replaced. If the grating temperature sensor 211 needs to be replaced, loosen the second threaded end 122 from the second connecting portion 133. At this time, the second clamping block 124 moves away from the second wire hole 123, so the diameter of the second wire hole 123 becomes larger, and the diameter of the second wire hole 123 is larger than the outer diameter of the transmission optical cable 2. Then loosen the first threaded end 112 from the first connecting portion 132. At this time, the first clamping block 114 moves away from the first wire hole 113, so the diameter of the first wire hole 113 becomes larger, and the diameter of the first wire hole 113 is larger than the outer diameter of the transmission optical cable 2. Step 2: first move the transmission end 22 away from the sheath 3, and then drive the measuring end 21 through the sheath 3, the first wire hole 113, and the second wire hole 123 in sequence by the transmission end 22, until the measuring end 21 is located outside the second wire hole 123; then insert the measuring end 21 of the new transmission optical cable 2 into the second wire hole 123, the first wire hole 113, and the sheath 3 in sequence, until the new measuring end 21 is located within the specified depth of the sheath 3; Step 3: First tighten the first threaded end 112 and the first connecting part 132. At this time, the first clamping block 114 moves toward the first wire hole 113 under the clamping action of the first connecting part 132, so the first clamping block 114 clamps the end of the transmission end 22 connected to the first clamping block 114 to achieve the first fixation of the transmission end 22. At the same time, the diameter of the first wire hole 113 becomes smaller; then tighten the second threaded end 122 and the second connecting part 133. At this time, the second clamping block 124 moves toward the second wire hole 123 under the clamping action of the second connecting part 133, so the second clamping block 124 clamps the end of the transmission end 22 connected to the second clamping block 124 to achieve the second fixation of the transmission end 22. At the same time, the diameter of the second wire hole 123 becomes smaller.

[0049] Embodiment 2: The basic content is the same as that of Example 1, except that: See also Figure 1 — Figure 2 The transmission optical cable 2 has a transmission optical fiber 23 inside, a grating temperature sensor 211 is arranged on the measuring end of the transmission optical fiber 23 , and a fixing point 24 is arranged on one side of the grating temperature sensor 211 close to the first connecting portion 132 .

[0050] When in use, the side of the grating temperature sensor 211 close to the fixed point 24 is fixed by glue, and the side of the grating temperature sensor 211 away from the fixed point 24 is in a free state; when the transmission optical fiber 23 is subjected to stress, since the side of the grating temperature sensor 211 close to the fixed point 24 is fixed and the other side is relaxed, the stress on the transmission optical fiber 23 will not cause the grating temperature sensor 211 to be affected by the stress, and the grating temperature sensor 211 will not be subjected to stress, so that the grating temperature sensor 211 will not generate an optical signal with a wavelength change due to the stress. The grating temperature sensor 211 will only generate an optical signal with a wavelength change due to temperature change, thereby improving the anti-interference performance of the grating temperature sensor 211.

[0051] Embodiment 3: The basic content is the same as that of Example 1, except that: See also Figure 1 — Fig.13 , the outer surface of the sheath 3 is connected to one side of the epoxy resin glue 31, and the other side of the epoxy resin glue 31 is connected to the inner surface of the groove 41; the bottom of the groove 41 is at the same height as the bottom of the pad 4. The width of the groove 41 is 5 to 7 mm, and the depth of the groove 41 is 4 to 6 mm. The outer diameter of the sheath 3 is 2 to 2.1 mm, and the inner diameter of the sheath 3 is 1.3 to 1.5 mm. The outer diameter of the transmission optical cable 2 is 1.1 to 1.2 mm, and the inner diameter of the transmission optical cable 2 is 0.9 to 1 mm. The material of the sheath 3 is polyetheretherketone, polytetrafluoroethylene, ethylene-tetrafluoroethylene copolymer or imide; the material of the pad 4 is epoxy resin. Preferably, the width of the groove 41 is 6 mm, and the depth of the groove 41 is 5 mm.

[0052] When used, the pad 4 is made of epoxy resin, so the pad 4 has a high thermal conductivity and has a good effect of transferring temperature to the sheath 3. Epoxy resin also has the advantages of being non-conductive, high temperature resistant, and resistant to compression and stretching. Therefore, the pad 4 can provide a stable operating environment for the sheath 3 and the transmission optical cable 2 inside it, thereby improving the stability of the grating temperature sensor 211 when monitoring temperature; the epoxy resin glue 31 not only fills the gap between the groove 41 and the sheath 3, but also achieves the effect of fixing the sheath 3 in the groove 41. The epoxy resin glue 31 also has good thermal conductivity; the material of the sheath 3 is polyetheretherketone, polytetrafluoroethylene, ethylene-tetrafluoroethylene Ethylene copolymer or imide, the sheath 3 has excellent thermal conductivity and high temperature resistance, and the sheath 3 is flexible, so the sheath 3 has good bending resistance and can easily cope with bending, torsion and other deformations without damaging the internal transmission optical cable 2. The sheath 3 also has good wear resistance, which can effectively protect the internal transmission optical cable 2 from friction, scratches and other physical damage, and extend the service life of the transmission optical cable 2. The sheath 3 can also absorb impact and vibration to a certain extent, and protect the internal transmission optical cable 2 from mechanical impact damage; the inner diameter of the sheath 3 is slightly larger than the outer diameter of the transmission optical cable 2, so the process of inserting the transmission optical cable 2 into the sheath 3 is relatively convenient.

[0053] The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiment. Any equivalent modifications or changes made by ordinary technicians in this field based on the contents disclosed by the present invention should be included in the protection scope recorded in the claims.

Claims

1. An easily replaceable generator stator wire rod optical fiber temperature measuring device, characterized in that: The device comprises a connector (1), a transmission optical cable (2) and a sheath (3); The connector (1) comprises a first wire locker (11), a second wire locker (12) and a connecting tube (13); the middle portion of the connecting tube (13) is a connecting cavity (131); the connecting cavity (131) penetrates the connecting tube (13) along the axis of the connecting tube (13); one end of the connecting cavity (131) is a first connecting portion (132); the other end of the connecting cavity (131) is a second connecting portion (133); the second connecting portion (133) is inserted with a second wire locker (12), the outer surface of the middle part of the second clamping end (121) is a second threaded end (122), the second threaded end (122) is threadedly connected to the second connecting part (133), the middle part of the second clamping end (121) is a second wire hole (123), the second wire hole (123) is connected to one end of the second connecting part (133), the front part of the second clamping end (121) is a plurality of second clamping blocks (124), The movement stroke of the second clamping block (124) is moving toward the second wire hole (123) and moving away from the second wire hole (123); the first clamping end (111) of the first wire lock (11) is inserted into the first connecting portion (132); the outer surface of the middle part of the first clamping end (111) is a first threaded end (112); the first threaded end (112) is threadedly connected to the first connecting portion (132); the middle part of the first clamping end (111) is The first connecting portion (132) is connected to the first connecting portion (132), the first connecting portion (113) is connected to the first connecting portion (132), the front portion of the first clamping end (111) is a plurality of first clamping blocks (114), the movement stroke of the first clamping blocks (114) is moving towards the first connecting portion (113) and away from the first connecting portion (113); the end of the first wire locker (11) away from the first clamping end (111) is a first connecting end (115); One end of the first connection end (115) away from the first pressing end (111) is connected to one end of the sheath (3); the outer surface of the other end of the sheath (3) is fixedly connected to a groove (41); the groove (41) is located on a pad (4) between layers of stator wire rods of the generator; a measuring end (21) of a transmission optical cable (2) is inserted into the sheath (3); a grating temperature sensor (211) is arranged on the measuring end (21); the end of the transmission optical cable (2) away from the measuring end is a transmission end (22); a first wire hole (113) and a second wire hole (123) are sequentially sheathed on the outside of the transmission end (22).

2. The easily replaceable generator stator wire rod optical fiber temperature measuring device according to claim 1, characterized in that: The second connecting portion (133) comprises a second threaded cavity (134) and a second conical cavity (135); the second threaded cavity (134) is threadedly connected to the second threaded end (122); the second conical cavity (135) is conical; the diameter of the second conical cavity (135) gradually decreases in a direction away from the second threaded cavity (134); the diameter of the second conical cavity (135) at one end away from the second threaded cavity (134) is smaller than the diameter of the second clamping block (124) at one end away from the second threaded end (122); and the inner surface of the second conical cavity (135) is slidably connected to the outer surface of the second clamping block (124).

3. The easily replaceable generator stator wire rod optical fiber temperature measuring device according to claim 2, characterized in that: The first connecting portion (132) includes a first threaded cavity (136) and a first conical cavity (137); the first threaded cavity (136) is threadedly connected to the first threaded end (112); the first conical cavity (137) is conical; the diameter of the first conical cavity (137) gradually decreases in a direction away from the first threaded cavity (136); the diameter of the first conical cavity (137) at one end away from the first threaded cavity (136) is smaller than the diameter of the first clamping block (114) at one end away from the first threaded end (112); and the inner surface of the first conical cavity (137) is slidably connected to the outer surface of the first clamping block (114).

4. The easily replaceable generator stator wire rod optical fiber temperature measuring device according to claim 1, 2 or 3, characterized in that: The interior of the transmission optical cable (2) is a transmission optical fiber (23), a grating temperature sensor (211) is provided on the measurement end of the transmission optical fiber (23), and a fixing point (24) is provided on a side of the grating temperature sensor (211) close to the first connecting portion (132).

5. The easily replaceable generator stator wire rod optical fiber temperature measuring device according to claim 1, 2 or 3, characterized in that: The outer surface of the sheath (3) is connected to one side of the epoxy resin glue (31), and the other side of the epoxy resin glue (31) is connected to the inner surface of the groove (41); the bottom of the groove (41) and the bottom of the cushion strip (4) are located at the same height.

6. The easily replaceable generator stator wire rod optical fiber temperature measuring device according to claim 5, characterized in that: The width of the groove (41) is five to seven millimeters, and the depth of the groove (41) is four to six millimeters.

7. The easily replaceable generator stator wire rod optical fiber temperature measuring device according to claim 6, characterized in that: The outer diameter of the sheath (3) is 2 to 2.1 millimeters, and the inner diameter of the sheath (3) is 1.3 to 1.5 millimeters.

8. The easily replaceable generator stator wire rod optical fiber temperature measuring device according to claim 7, characterized in that: The outer diameter of the transmission optical cable (2) is 1.1 to 1.2 millimeters, and the inner diameter of the transmission optical cable (2) is 0.9 to 1 millimeter.

9. The easily replaceable generator stator wire rod optical fiber temperature measuring device according to claim 8, characterized in that: The material of the sheath (3) is polyetheretherketone, polytetrafluoroethylene, ethylene-tetrafluoroethylene copolymer or imide; the material of the cushion strip (4) is epoxy resin.

10. A method for using the easily replaceable generator stator wire rod optical fiber temperature measuring device according to claim 1, characterized in that: The method of use comprises the following steps: The first step: first confirm whether the grating temperature sensor (211) needs to be replaced. If the grating temperature sensor (211) needs to be replaced, then loosen the second threaded end (122) from the second connecting portion (133). At this time, the second clamping block (124) moves away from the second wire hole (123), so the diameter of the second wire hole (123) becomes larger, and the diameter of the second wire hole (123) is larger than the outer diameter of the transmission optical cable (2). Then loosen the first threaded end (112) from the first connecting portion (132). At this time, the first clamping block (114) moves away from the first wire hole (113), so the diameter of the first wire hole (113) becomes larger, and the diameter of the first wire hole (113) is larger than the outer diameter of the transmission optical cable (2); Step 2: first move the transmission end (22) away from the sheath (3), and then drive the measuring end (21) through the sheath (3), the first wire hole (113), and the second wire hole (123) in sequence by the transmission end (22), until the measuring end (21) is located outside the second wire hole (123); then insert the measuring end (21) of the new transmission optical cable (2) into the second wire hole (123), the first wire hole (113), and the sheath (3) in sequence, until the new measuring end (21) is located within a specified depth of the sheath (3); Step 3: First, tighten the first threaded end (112) and the first connecting portion (132). At this time, the first clamping block (114) moves toward the first wire hole (113) under the clamping action of the first connecting portion (132). Therefore, the first clamping block (114) clamps the end of the transmission end (22) connected to the first clamping block (114) to achieve the first fixation of the transmission end (22). At the same time, the diameter of the first wire hole (113) becomes smaller. Then, tighten the second threaded end (122) and the second connecting portion (133). At this time, the second clamping block (124) moves toward the second wire hole (123) under the clamping action of the second connecting portion (133). Therefore, the second clamping block (124) clamps the end of the transmission end (22) connected to the second clamping block (124) to achieve the second fixation of the transmission end (22). At the same time, the diameter of the second wire hole (123) becomes smaller.

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