Vibration monitoring device for oil-immersed transformers in power grid based on optical fiber sensing

Abstract

The present invention discloses a vibration monitoring device for oil-immersed transformers of power grid based on optical fiber sensing, which belongs to the field of transformer vibration monitoring. The vibration monitoring device for oil-immersed transformers of power grid based on optical fiber sensing includes two insulating rods, one of which is fixed on the oil tank, and the other is fixed on the iron core, and also includes an optical fiber body, which is arranged on the two insulating rods, and the optical fiber body is provided with two winding sections, and the optical fiber body is provided with two connecting ends, wherein the winding section is wound on the insulating rods; a first circulator, which is connected to one of the connecting ends; the present invention makes the second circular groove seal and fit the outer wall of the optical fiber body, so as to prevent the influence of oil vibration on the winding section, thereby effectively improving the sealing of the optical fiber body, and then effectively preventing the oil from contacting the winding section of the optical fiber body to affect the monitoring result.

Description

Technical Field

[0001] The invention relates to the technical field of transformer vibration monitoring, and in particular to a power grid oil-immersed transformer vibration monitoring device based on optical fiber sensing. Background Art

[0002] Power transformers are important electrical equipment in power grid systems. As power systems develop towards ultra-high voltage, large grids, large capacity and automation, it is extremely important to improve the operational reliability of power transformers, which are the most critical in power systems. Due to the strong electromagnetic interference in the transformer installation environment, most of the current vibration monitoring methods are to stick acceleration sensors on the transformer body. A few also use optical fiber vibration sensors to detect transformer cores or windings for vibration monitoring. However, there are many factors that cause transformer vibration, mainly the vibration of the core and windings, the vibration of the transformer itself and the vibration of the oil tank, and the vibration of the transformer caused by the external environment such as wind and rain. These vibration factors affect each other.

[0003] In the prior art, the patent with publication number: CN113341348A and publication date: 2021-09-03 discloses a vibration monitoring device for oil-immersed transformers of power grid based on optical fiber sensing, including two insulating rods, oil-resistant single-core optical cables, two circulators, two lasers, two photodetectors, and a computer; one of the insulating rods is used to be bonded and fixed on the iron core or winding of the transformer, and the other insulating rod is used to be bonded and fixed on the inner wall of the oil tank; the oil-resistant single-core optical cable has two vibration-sensing sections tightly wound on the two insulating rods; the middle port of one circulator is connected to one end of the oil-resistant single-core optical cable, and the middle port of the other circulator is connected to the other end; the two lasers are respectively connected to the input ports of the two circulators; the two photodetectors are respectively connected to the output ports of the two circulators; the computer is electrically connected to the two photodetectors respectively. The vibration monitoring device for oil-immersed transformers of power grid based on optical fiber sensing provided by the present invention has high vibration monitoring and positioning accuracy and good anti-interference performance.

[0004] Although the above patent monitors the vibration of the oil-immersed transformer very well, the sealing of the single-core optical cable is achieved through the threading hole. It is possible that after a period of time, the oil will come into contact with the single-core optical cable under the action of pressure, which may affect the accuracy of vibration monitoring of the oil-immersed transformer. Summary of the invention

[0005] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a vibration monitoring device for oil-immersed transformers in a power grid based on optical fiber sensing, which can overcome the above problems or at least partially solve the above problems.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] The vibration monitoring device of oil-immersed transformer of power grid based on optical fiber sensing comprises: two insulating rods, one of which is fixed on the oil tank, and the other is fixed on the iron core, and also comprises: an optical fiber body, which is arranged on the two insulating rods, and the optical fiber body is provided with two winding sections, and the optical fiber body is provided with two connecting ends, wherein the winding sections are wound on the insulating rods; a first circulator, which is connected to one of the connecting ends; a second circulator, which is connected to the other connecting end; a first transmitter, which is connected to the first circulator; a second transmitter, which is connected to the second circulator; a first detector, which is connected to the first circulator; a second detector ... first detector, which is connected to the second circulator; a first detector, which is connected to the second circulator; a first detector, which is connected to the second circulator; a first detector, which is connected to the first circulator; a second detector, which is connected to the second circulator; a first detector, which is connected to the first circulator; a first detector, which is connected to the second circulator; a first detector, which is connected to the second circulator; a first detector, which is connected to the first circulator; a first detector, which is connected to the second circulator; a The first circulator is connected to the first circulator; the second detector is connected to the second circulator; a computer; a delay device is arranged between the two winding sections; the first detector and the second detector are both connected to the computer; a sealing barrel is arranged on the outside of the insulating rod; a screw hole is opened in the insulating rod; an air bag is arranged on one side of the insulating rod; two second circular grooves are symmetrically opened on the air bag, and the second circular grooves match the optical fiber body; a first circular groove is opened on the air bag, and the first circular groove matches the screw hole; a screw rod is threadedly connected in the screw hole; a sealing plate is fixed on the screw rod, and the sealing plate matches the air bag.

[0008] In order to improve the fit between the airbag and the optical fiber body, preferably, a bonding plate is fixedly connected to the airbag, the bonding plate matches the airbag, a third circular groove is formed on the bonding plate, and the diameter of the sealing plate is larger than the diameter of the third circular groove.

[0009] In order to prevent friction between the screw and the airbag, preferably, the side wall of the first circular groove is fixedly connected to a limiting ring, the limiting ring matches the screw, the sealing plate is fixedly connected to a pressure ring matching the airbag, and the sealing plate is fixedly connected to a fixing plate on the side away from the screw.

[0010] In order to facilitate the winding of the optical fiber body on the insulating rod, preferably, a spiral groove is provided on the insulating rod, a through hole connected to the spiral groove is provided at one end of the insulating rod, and a through section matching the through hole is provided on the winding section.

[0011] In order to limit the position of the optical fiber body, preferably, a rubber ring is fixedly connected to the insulating rod, a spiral limiting groove matching the winding section is provided on the rubber ring, and rubber sheets are provided on both sides of the spiral limiting groove.

[0012] In order to prevent the optical fiber body from loosening, preferably, the distance between the two rubber sheets is smaller than the diameter of the optical fiber body.

[0013] In order to facilitate the installation of the sealing barrel, preferably, a fixing sleeve is provided on the rubber ring, a threaded groove is opened on the fixing sleeve, a threaded block matching the threaded groove is fixedly connected in the sealing barrel, and a limit block matching the fixing sleeve is fixedly connected to the rubber ring.

[0014] In order to facilitate the fixation of the optical fiber body, preferably, a plurality of pressing plates are fixedly connected in the fixing sleeve, and the pressing plates match the winding sections.

[0015] In order to facilitate the installation of the fixing sleeve, preferably, the pressing plate is arranged obliquely.

[0016] In order to facilitate the clamping of the winding section of the optical fiber body, preferably, the pressing plate is provided with a plurality of clamping grooves matching the winding section.

[0017] Compared with the prior art, the present invention provides a vibration monitoring device for oil-immersed transformers in power grids based on optical fiber sensing, which has the following beneficial effects:

[0018] 1. The vibration monitoring device for oil-immersed transformer of power grid based on optical fiber sensing is implemented by sleeve-connecting a sealing barrel on the outer side of an insulating rod, wherein one end of the sealing barrel close to an iron core or an oil tank is provided with a sealing rubber, and an airbag is moved into the sealing barrel so that the airbag fits with the insulating rod and the sealing barrel, and a screw is inserted into a screw hole, and the screw is rotated, so that a sealing plate on the screw compresses the airbag, and the airbag is deformed, so that the second circular groove fits with the outer wall of the optical fiber body in a sealing manner, thereby preventing the influence of oil vibration on the winding section, thereby effectively improving the sealing of the optical fiber body, and further effectively preventing the oil from contacting the winding section of the optical fiber body to affect the monitoring result.

[0019] 2. The optical fiber sensing-based vibration monitoring device for oil-immersed transformers in power grid compresses the airbag through a pressure ring. After the airbag is deformed, the bonding plate slides outward, and then the bonding plate is pressed by a sealing plate to compress the airbag again, thereby effectively improving the fit between the airbag and the optical fiber body, thereby effectively preventing the oil from contacting the optical fiber body, and by setting a limit ring, effectively preventing the friction between the airbag and the screw from causing wear of the airbag.

[0020] 3. The vibration monitoring device for oil-immersed transformers in power grids based on optical fiber sensing is implemented by sleeve-connecting a rubber ring to an insulating rod, then winding an optical fiber body in a spiral groove, and initially limiting and locking the optical fiber body through a spiral limiting groove and a rubber sheet, thereby effectively preventing the optical fiber body from loosening when winding the optical fiber body, and further effectively preventing the winding section of the optical fiber body from excessively oscillating itself and affecting the accuracy of the monitoring result.

[0021] 4. The vibration monitoring device for oil-immersed transformers in power grids based on optical fiber sensing is clamped into a fixed sleeve through two limit blocks, and then the sealing barrel is screwed to the fixed sleeve. At this time, the threaded block gradually squeezes the pressure plate, so that the pressure plate performs secondary fixation on the winding section of the optical fiber body, thereby effectively preventing the winding section of the optical fiber body from oscillating and affecting its monitoring results.

[0022] The parts not involved in the device are the same as the prior art or can be implemented by using the prior art. The present invention makes the second circular groove seal and fit the outer wall of the optical fiber body, thereby preventing the influence of oil vibration on the winding section, thereby effectively improving the sealing of the optical fiber body, and further effectively preventing the oil from contacting the winding section of the optical fiber body and affecting the monitoring results. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 The structure diagram of the vibration monitoring device for oil-immersed transformer in power grid based on optical fiber sensing proposed by the present invention is shown in FIG. Figure 1 ;

[0024] Figure 2 This is a cross-sectional diagram of the vibration monitoring device for oil-immersed transformers in power grids based on optical fiber sensing proposed by the present invention. Figure 1 ;

[0025] Figure 3 This is a schematic diagram of the explosion structure of the optical fiber sensing-based vibration monitoring device for oil-immersed transformers in power grids proposed by the present invention;

[0026] Figure 4 The structure diagram of the vibration monitoring device for oil-immersed transformer in power grid based on optical fiber sensing proposed by the present invention is shown in FIG. Figure 2 ;

[0027] Figure 5 This is a cross-sectional diagram of the vibration monitoring device for oil-immersed transformers in power grids based on optical fiber sensing proposed by the present invention. Figure 2 ;

[0028] Figure 6 This is a schematic diagram of the structure of the rubber ring of the vibration monitoring device for oil-immersed transformer of power grid based on optical fiber sensing proposed by the present invention;

[0029] Figure 7 The cross-sectional schematic diagram of the fixing sleeve of the optical fiber sensing-based vibration monitoring device for oil-immersed transformers in power grids proposed by the present invention.

[0030] In the figure: 1, iron core; 101, oil tank; 102, first circulator; 103, first transmitter; 104, first detector; 105, second circulator; 106, second transmitter; 107, second detector; 108, computer; 109, delay device; 2, insulating rod; 201, spiral groove; 202, screw hole; 203, through hole; 3, optical fiber; 301, winding section; 302, through section; 303, connection end; 4, Rubber ring; 401, spiral limiting groove; 402, rubber sheet; 403, limiting block; 5, fixing sleeve; 501, pressing plate; 502, slot; 503, threaded groove; 6, sealing barrel; 601, threaded block; 7, screw; 701, pressing ring; 702, sealing plate; 703, fixing plate; 704, airbag; 705, first circular groove; 706, second circular groove; 707, limiting ring; 708, bonding plate; 709, third circular groove. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0032] Example 1: Reference Figure 1-Figure 7 , a vibration monitoring device for oil-immersed transformers in power grid based on optical fiber sensing, comprising: two insulating rods 2, one of which is fixed on an oil tank 101, and the other is fixed on an iron core 1, characterized in that it also comprises: an optical fiber body 3, which is arranged on the two insulating rods 2, and the optical fiber body 3 is provided with two winding sections 301, and the optical fiber body 3 is provided with two connecting ends 303, wherein the winding sections 301 are wound on the insulating rods 2; a first circulator 102, which is connected to one of the connecting ends 303; a second circulator 105, which is connected to the other connecting end 303; a first transmitter 103, which is connected to the first circulator 102; a second transmitter 106, which is connected to the second circulator 105; a first detector 104, which is connected to the first circulator 1 02; a second detector 107, connected to the second circulator 105; a computer 108; a delay device 109, arranged between the two winding sections 301; the first detector 104 and the second detector 107 are both connected to the computer 108; a sealing barrel 6, arranged on the outside of the insulating rod 2; a screw hole 202, opened in the insulating rod 2; an air bag 704, arranged on one side of the insulating rod 2; two second circular grooves 706, symmetrically opened on the air bag 704, and the second circular grooves 706 match the optical fiber body 3; a first circular groove 705, opened on the air bag 704, and the first circular groove 705 matches the screw hole 202; a screw rod 7, threadedly connected in the screw hole 202; a sealing plate 702, fixed on the screw rod 7, and the sealing plate 702 matches the air bag 704.

[0033] When performing vibration monitoring on an oil-immersed transformer, two insulating rods 2 are respectively installed on the iron core 1 and the oil tank 101, and then the optical fiber body 3 is wound and fixed on the insulating rod 2, and finally the sealing barrel 6 is sleeved on the outside of the insulating rod 2, wherein the end of the sealing barrel 6 close to the iron core 1 or the oil tank 101 is set as a sealing rubber, and the airbag 704 is moved into the sealing barrel 6 so that the airbag 704 fits with the insulating rod 2 and the sealing barrel 6, and the screw 7 is inserted into the screw hole 202, and the screw 7 is rotated. The sealing plate 702 on the screw 7 compresses the airbag 704, and the airbag 704 is deformed, so that the second circular groove 706 is sealed and fits with the outer wall of the optical fiber body 3, thereby preventing the influence of oil vibration on the winding section 301, thereby effectively improving the sealing of the optical fiber body 3, and then effectively preventing the oil from contacting the winding section 301 of the optical fiber body 3 to affect the monitoring result.

[0034] During specific monitoring, optical signals are emitted by the first emitter 103 and the second emitter 106, and wavelength changes in the first circulator 102 and the second circulator 105 are monitored respectively by the first detector 104 and the second detector 107, and the signals are transmitted to the computer 108 for analysis and comparison, so as to determine whether the transformer has abnormal vibration and the specific vibration position, thereby effectively improving the accuracy of determining the vibration source of the transformer.

[0035] Example 2: Reference Figure 1-Figure 7, a vibration monitoring device for oil-immersed transformers in power grid based on optical fiber sensing, comprising: two insulating rods 2, one of which is fixed on an oil tank 101, and the other is fixed on an iron core 1, characterized in that it also comprises: an optical fiber body 3, which is arranged on the two insulating rods 2, and the optical fiber body 3 is provided with two winding sections 301, and the optical fiber body 3 is provided with two connecting ends 303, wherein the winding sections 301 are wound on the insulating rods 2; a first circulator 102, which is connected to one of the connecting ends 303; a second circulator 105, which is connected to the other connecting end 303; a first transmitter 103, which is connected to the first circulator 102; a second transmitter 106, which is connected to the second circulator 105; a first detector 104, which is connected to the first circulator 1 02; a second detector 107, connected to the second circulator 105; a computer 108; a delay device 109, arranged between the two winding sections 301; the first detector 104 and the second detector 107 are both connected to the computer 108; a sealing barrel 6, arranged on the outside of the insulating rod 2; a screw hole 202, opened in the insulating rod 2; an air bag 704, arranged on one side of the insulating rod 2; two second circular grooves 706, symmetrically opened on the air bag 704, and the second circular grooves 706 match the optical fiber body 3; a first circular groove 705, opened on the air bag 704, and the first circular groove 705 matches the screw hole 202; a screw rod 7, threadedly connected in the screw hole 202; a sealing plate 702, fixed on the screw rod 7, and the sealing plate 702 matches the air bag 704.

[0036] A bonding plate 708 is fixedly connected to the airbag 704 , and the bonding plate 708 matches the airbag 704 . A third circular groove 709 is formed on the bonding plate 708 , and the diameter of the sealing plate 702 is greater than the diameter of the third circular groove 709 .

[0037] The side wall of the first circular groove 705 is fixedly connected with a limit ring 707 which matches the screw rod 7 . A pressure ring 701 which matches the air bag 704 is fixedly connected to the sealing plate 702 . A fixing plate 703 is fixedly connected to the side of the sealing plate 702 away from the screw rod 7 .

[0038] When tightening the screw 7, the pressure ring 701 first compresses the airbag 704. After the airbag 704 is deformed, the bonding plate 708 slides outward, and then the bonding plate 708 is pressed by the sealing plate 702, so that the airbag 704 is compressed again, thereby effectively improving the fit between the airbag 704 and the optical fiber body 3, and then effectively preventing the oil from contacting the optical fiber body 3. By setting the limit ring 707, the friction between the airbag 704 and the screw 7 can be effectively prevented from causing wear of the airbag 704.

[0039] Example 3: Reference Figure 1-Figure 7, a vibration monitoring device for oil-immersed transformers in power grid based on optical fiber sensing, comprising: two insulating rods 2, one of which is fixed on an oil tank 101, and the other is fixed on an iron core 1, characterized in that it also comprises: an optical fiber body 3, which is arranged on the two insulating rods 2, and the optical fiber body 3 is provided with two winding sections 301, and the optical fiber body 3 is provided with two connecting ends 303, wherein the winding sections 301 are wound on the insulating rods 2; a first circulator 102, which is connected to one of the connecting ends 303; a second circulator 105, which is connected to the other connecting end 303; a first transmitter 103, which is connected to the first circulator 102; a second transmitter 106, which is connected to the second circulator 105; a first detector 104, which is connected to the first circulator 1 02; a second detector 107, connected to the second circulator 105; a computer 108; a delay device 109, arranged between the two winding sections 301; the first detector 104 and the second detector 107 are both connected to the computer 108; a sealing barrel 6, arranged on the outside of the insulating rod 2; a screw hole 202, opened in the insulating rod 2; an air bag 704, arranged on one side of the insulating rod 2; two second circular grooves 706, symmetrically opened on the air bag 704, and the second circular grooves 706 match the optical fiber body 3; a first circular groove 705, opened on the air bag 704, and the first circular groove 705 matches the screw hole 202; a screw rod 7, threadedly connected in the screw hole 202; a sealing plate 702, fixed on the screw rod 7, and the sealing plate 702 matches the air bag 704.

[0040] A bonding plate 708 is fixedly connected to the airbag 704 , and the bonding plate 708 matches the airbag 704 . A third circular groove 709 is formed on the bonding plate 708 , and the diameter of the sealing plate 702 is greater than the diameter of the third circular groove 709 .

[0041] The side wall of the first circular groove 705 is fixedly connected with a limit ring 707 which matches the screw rod 7 . A pressure ring 701 which matches the air bag 704 is fixedly connected to the sealing plate 702 . A fixing plate 703 is fixedly connected to the side of the sealing plate 702 away from the screw rod 7 .

[0042] A spiral groove 201 is formed on the insulating rod 2 , a through hole 203 communicating with the spiral groove 201 is formed at one end of the insulating rod 2 , and a through section 302 matching with the through hole 203 is formed on the winding section 301 .

[0043] A rubber ring 4 is fixedly connected to the insulating rod 2 . A spiral limiting groove 401 matching the winding section 301 is formed on the rubber ring 4 . Rubber sheets 402 are arranged on both sides of the spiral limiting groove 401 .

[0044] The distance between the two rubber sheets 402 is smaller than the diameter of the optical fiber body 3 .

[0045] When winding the optical fiber body 3, firstly put the rubber ring 4 on the insulating rod 2, then wind the optical fiber body 3 in the spiral groove 201, and perform preliminary limiting and locking on the optical fiber body 3 through the spiral limiting groove 401 and the rubber sheet 402, so as to effectively prevent the optical fiber body 3 from loosening when winding the optical fiber body 3, and further effectively prevent the winding section 301 of the optical fiber body 3 from excessive self-oscillation and affect the accuracy of the monitoring result.

[0046] Example 4: Reference Figure 1-Figure 7 , a vibration monitoring device for oil-immersed transformers in power grid based on optical fiber sensing, comprising: two insulating rods 2, one of which is fixed on an oil tank 101, and the other is fixed on an iron core 1, characterized in that it also comprises: an optical fiber body 3, which is arranged on the two insulating rods 2, and the optical fiber body 3 is provided with two winding sections 301, and the optical fiber body 3 is provided with two connecting ends 303, wherein the winding sections 301 are wound on the insulating rods 2; a first circulator 102, which is connected to one of the connecting ends 303; a second circulator 105, which is connected to the other connecting end 303; a first transmitter 103, which is connected to the first circulator 102; a second transmitter 106, which is connected to the second circulator 105; a first detector 104, which is connected to the first circulator 1 02; a second detector 107, connected to the second circulator 105; a computer 108; a delay device 109, arranged between the two winding sections 301; the first detector 104 and the second detector 107 are both connected to the computer 108; a sealing barrel 6, arranged on the outside of the insulating rod 2; a screw hole 202, opened in the insulating rod 2; an air bag 704, arranged on one side of the insulating rod 2; two second circular grooves 706, symmetrically opened on the air bag 704, and the second circular grooves 706 match the optical fiber body 3; a first circular groove 705, opened on the air bag 704, and the first circular groove 705 matches the screw hole 202; a screw rod 7, threadedly connected in the screw hole 202; a sealing plate 702, fixed on the screw rod 7, and the sealing plate 702 matches the air bag 704.

[0047] A bonding plate 708 is fixedly connected to the airbag 704 , and the bonding plate 708 matches the airbag 704 . A third circular groove 709 is formed on the bonding plate 708 , and the diameter of the sealing plate 702 is greater than the diameter of the third circular groove 709 .

[0048] The side wall of the first circular groove 705 is fixedly connected with a limit ring 707 which matches the screw rod 7 . A pressure ring 701 which matches the air bag 704 is fixedly connected to the sealing plate 702 . A fixing plate 703 is fixedly connected to the side of the sealing plate 702 away from the screw rod 7 .

[0049] A spiral groove 201 is formed on the insulating rod 2 , a through hole 203 communicating with the spiral groove 201 is formed at one end of the insulating rod 2 , and a through section 302 matching with the through hole 203 is formed on the winding section 301 .

[0050] A rubber ring 4 is fixedly connected to the insulating rod 2 . A spiral limiting groove 401 matching the winding section 301 is formed on the rubber ring 4 . Rubber sheets 402 are arranged on both sides of the spiral limiting groove 401 .

[0051] The distance between the two rubber sheets 402 is smaller than the diameter of the optical fiber body 3 .

[0052] A fixing sleeve 5 is arranged on the rubber ring 4 , a thread groove 503 is opened on the fixing sleeve 5 , a thread block 601 matching the thread groove 503 is fixedly connected in the sealing barrel 6 , and a limiting block 403 matching the fixing sleeve 5 is fixedly connected to the rubber ring 4 .

[0053] A plurality of pressing plates 501 are fixedly connected in the fixing sleeve 5 , and the pressing plates 501 match the winding sections 301 .

[0054] The pressing plate 501 is arranged to be inclined.

[0055] The pressing plate 501 is provided with a plurality of slots 502 matching the winding segments 301 .

[0056] When installing the fixing sleeve 5, the two limit blocks 403 are snapped into the fixing sleeve 5, and then the sealing barrel 6 is screwed to the fixing sleeve 5. At this time, the threaded block 601 gradually squeezes the pressure plate 501, so that the pressure plate 501 performs secondary fixation on the winding section 301 of the optical fiber body 3, thereby effectively preventing the winding section 301 of the optical fiber body 3 from oscillating and affecting its monitoring result.

[0057] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A vibration monitoring device for oil-immersed transformers in power grid based on optical fiber sensing, comprising: Two insulating rods (2), one of the insulating rods (2) is fixed on the oil tank (101), and the other insulating rod (2) is fixed on the iron core (1), characterized in that it also includes: An optical fiber body (3) is arranged on the two insulating rods (2), the optical fiber body (3) is provided with two winding sections (301), and the optical fiber body (3) is provided with two connection ends (303), wherein the winding sections (301) are wound on the insulating rods (2); A first circulator (102) connected to one of the connection ends (303); A second circulator (105) connected to the other connecting end (303); A first transmitter (103), connected to the first circulator (102); A second transmitter (106), connected to the second circulator (105); A first detector (104) connected to the first circulator (102); A second detector (107), connected to the second circulator (105); Computer (108); A time delay device (109) is arranged between the two winding sections (301); The first detector (104) and the second detector (107) are both connected to a computer (108); A sealing barrel (6) is arranged on the outside of the insulating rod (2); A screw hole (202) is provided in the insulating rod (2); An air bag (704) is arranged on one side of the insulating rod (2); Two second circular grooves (706) are symmetrically arranged on the airbag (704), and the second circular grooves (706) match the optical fiber body (3); A first circular groove (705) is provided on the airbag (704), and the first circular groove (705) matches the screw hole (202); A screw rod (7) threadedly connected in the screw hole (202); A sealing plate (702) is fixed on the screw rod (7), and the sealing plate (702) matches the air bag (704); The airbag (704) is fixedly connected with a bonding plate (708), the bonding plate (708) matches the airbag (704), a third circular groove (709) is formed on the bonding plate (708), and the diameter of the sealing plate (702) is greater than the diameter of the third circular groove (709); A limit ring (707) is fixedly connected to the side wall of the first circular groove (705), the limit ring (707) matches the screw rod (7), a pressure ring (701) matching the airbag (704) is fixedly connected to the sealing plate (702), and a fixing plate (703) is fixedly connected to the side of the sealing plate (702) away from the screw rod (7); The insulating rod (2) is provided with a spiral groove (201), one end of the insulating rod (2) is provided with a through hole (203) communicating with the spiral groove (201), and the winding section (301) is provided with a through section (302) matching with the through hole (203); A rubber ring (4) is fixedly connected to the insulating rod (2), the rubber ring (4) is provided with a spiral limiting groove (401) matching the winding section (301), and rubber sheets (402) are provided on both sides of the spiral limiting groove (401); The distance between the two rubber sheets (402) is smaller than the diameter of the optical fiber body (3); The rubber ring (4) is provided with a fixing sleeve (5), the fixing sleeve (5) is provided with a thread groove (503), a thread block (601) matching the thread groove (503) is fixedly connected in the sealing barrel (6), and a limit block (403) matching the fixing sleeve (5) is fixedly connected to the rubber ring (4).

2. The optical fiber sensing-based vibration monitoring device for oil-immersed transformers in power grids according to claim 1 is characterized in that: A plurality of pressing plates (501) are fixedly connected inside the fixing sleeve (5), and the pressing plates (501) match the winding sections (301).

3. The optical fiber sensing-based vibration monitoring device for oil-immersed transformers in power grids according to claim 2 is characterized in that: The pressing plate (501) is arranged at an angle.

4. The optical fiber sensing-based vibration monitoring device for oil-immersed transformers in power grids according to claim 2 is characterized in that: The pressing plate (501) is provided with a plurality of slots (502) matching the winding section (301).

Images