Monitoring device for cracking gas of high-voltage cable

Abstract

The utility model relates to the technical field of high-voltage cable cracking gas monitoring, in particular to a high-voltage cable cracking gas monitoring device which comprises an upper clamping ring of a semicircular structure, a lower clamping ring of a semicircular structure is hinged to one end of the upper clamping ring, the other end of the upper clamping ring is locked on the lower clamping ring, a fixing groove is formed in the inner wall of the upper clamping ring, and the lower clamping ring is hinged to the lower clamping ring. A fixing plate of an n-shaped structure is arranged in the fixing groove, a gas sensor, a lamp source and a photoresistor are arranged on the fixing plate, the gas sensor is installed on a top plate of the fixing plate, the lamp source and the photoresistor are installed on the two sides of the inner wall of the fixing plate respectively, and an adjusting mechanism is arranged on the fixing plate. And the adjusting mechanism comprises two screws and first nuts which are arranged on the two screws in a threaded and sleeving mode, an adjusting groove is formed in the side arm of the upper clamping ring, and one side of the adjusting groove is connected with the fixing groove. The utility model provides the monitoring device for the cracking gas of the high-voltage cable, which is convenient for detecting the high-voltage cable in real time and adjusting the detection position.

Description

TECHNICAL FIELD

[0001] The utility model relates to high pressure cable pyrolysis gas's monitoring technical field, specifically related to a kind of high pressure cable pyrolysis gas's monitoring device. BACKGROUND

[0002] High-voltage cable plays a vital role in the process of power transmission, and is also the core component of the power system. High-voltage cable is twisted by several wires or several groups of wires, and the appearance of high-voltage cable is similar to a rope. Each group of wires is insulated from each other. Usually, these wires are twisted around a center line and the entire cable is wrapped with a layer of highly insulating cover. In the process of operation and use of high-voltage cable, for safety reasons, the joints of high-voltage cable are often placed in the environment of electric well, power distribution station, etc. The joints of high-voltage cable may gradually accumulate faults, which often takes a period of time. The initial fault is usually partial discharge, and then the insulation material will gradually lose its effectiveness due to aging, which may eventually lead to breakdown and cause failure. In this series of changes, the temperature of high-voltage cable will gradually rise, causing the cable material to crack and produce gas. Once the high-voltage cable fails, it will have a very serious impact on the entire power supply system, so it is extremely necessary to regularly monitor the high-voltage cable. By monitoring the high-voltage cable, potential defects in the cable can be detected in time, so that measures can be taken to avoid power failure and ensure the stability and reliability of the power supply system.

[0003] In order to detect the cracking of the joint of the high-voltage cable, the joint of the cable is detected by using a gas detection device, that is, whether the joint of the cable cracks and releases gas is determined to determine the cracking information of the joint of the cable. At present, the working principle of the gas detection device is mainly to analyze the spectrum intensity and waveform adjustment of the gas to detect the existence and concentration of the gas, so as to determine the strength of the gas released by the high-voltage cable, and then determine the degree of cracking of the joint of the cable. However, since the spectrometer in the gas detection device is difficult to be directly assembled to the joint of the high-voltage cable, an indirect method needs to be taken. Specifically, the gas released by the joint of the cable is first collected by using a gas collection cabin, and then the collected gas is transmitted into the gas detection device for analysis to understand whether the joint of the cable cracks and releases gas. However, it is very troublesome to manually collect the high-voltage cable cracking gas, and there is a certain safety risk. In addition, since the power distribution system itself is not completely sealed, the high-voltage cable cracking gas may diffuse out of the power distribution system, which may cause the data obtained by the timing detection to be not always accurate, and it is difficult to detect the joint of the cable in real time, which makes it difficult to timely grasp the cable cracking information. In addition, even if the gas detection device is assembled to the joint of the high-voltage cable, the detection position of the gas detection device is difficult to adjust, which makes it difficult for the high-voltage cable cracking gas to effectively enter the gas detection device, thereby causing the detection result to be not accurate. Therefore, there are deficiencies in the detection of the high-voltage cable cracking gas, which need to be solved, so as to facilitate real-time detection of the high-voltage cable, facilitate adjustment of the detection position, and improve the accuracy of the high-voltage cable cracking gas detection. SUMMARY

[0004] In view of the defects in the prior art, the utility model provides a kind of high-voltage cable cracking gas's monitoring device for overcoming the defects in the prior art, which is convenient for real-time detection of high-voltage cable, and is convenient for adjusting detection position.

[0005] The technical scheme adopted by the utility model is as follows: a kind of high-voltage cable cracking gas's monitoring device, including the upper snap ring of semicircle ring structure, the lower snap ring of semicircle structure is hinged to one end of upper snap ring, the other end of upper snap ring is locked on lower snap ring, fixed groove is opened on the inner wall of upper snap ring, n-shaped structure's fixed plate is arranged in fixed groove, gas sensor, light source and photoresistor are respectively arranged on fixed plate, gas sensor is installed on the top plate of fixed plate, light source and photoresistor are respectively installed on the inner wall of fixed plate, adjusting mechanism is arranged on the fixed plate;The adjusting mechanism includes two screw rods and the first nut is threadedly sleeved on the two screw rods, adjusting groove is opened on the side arm of upper snap ring, one side of adjusting groove is connected with fixed groove, two screw rods are sleeved in adjusting groove, one end of two screw rods is respectively mounted on the two sides of fixed plate, and fixed plate is clamped on upper snap ring by first nut.

[0006] Preferably, the upper clamping ring outside the fixing groove is provided with a stepped sleeve hole, the hole diameter of the side of the sleeve hole close to the lower clamping ring is not less than the hole diameter of the side of the sleeve hole away from the lower clamping ring, a fixing tube is movably sleeved in the sleeve hole, the side of the fixing tube close to the lower clamping ring is provided with a thermistor, the thermistor and the fixing ring are respectively installed on the fixing tube, the side of the upper clamping ring away from the lower clamping ring is provided with a second nut, the second nut is threadedly sleeved on the fixing tube, the fixing tube is clamped on the upper clamping ring through the fixing ring and the second nut, and the side of the second nut is in contact with the outer wall of the upper clamping ring.

[0007] Preferably, the temperature sensing end of the thermistor faces the lower clamping ring, the side of the fixing ring away from the thermistor is provided with a first spring, the first spring is located in the side of the sleeve hole close to the lower clamping ring, and the two sides of the first spring are respectively in contact with the upper clamping ring and the fixing ring.

[0008] Preferably, the fixing groove and the adjusting groove are both circular groove structures, the center of the fixing groove and the center of the adjusting groove are located on the same axis, the upper clamping ring on the side of the fixing groove away from the lower clamping ring is provided with a through groove, the through groove is opened along the outer wall of the upper clamping ring to the through groove, the two sides of the fixing plate are respectively provided with guide grooves, the guide grooves are opened on the inner wall of the fixing plate, the guide grooves are located below the light source or the photoresistor, and the groove width of the guide groove gradually increases along the direction close to the lower clamping ring.

[0009] Preferably, the outer side of the upper clamping ring is provided with a fan, and a buckle mechanism is arranged between the fan and the upper clamping ring; the buckle mechanism comprises a support plate with an L-shaped cross section arranged on the side of the fixing groove away from the adjusting groove, a support rod arranged on the outer side of the support plate, a buckle plate arranged on the support rod, and a second spring and a third nut arranged in sequence on the side of the buckle plate away from the support plate; the upper clamping ring is provided with a support groove with an L-shaped cross section, one side of the support plate is sleeved in the support groove, and the support rod is located outside the upper clamping ring; the number of the support rods is two, the bottom ends of the two support rods are respectively installed on the support plate; two through holes are opened on the buckle plate, the two through holes are respectively sleeved on the support rods, the third nut is threadedly arranged on the support rod, the second spring is clamped on the third nut and the buckle plate, one side of the buckle plate is in contact with the upper clamping ring, and the bottom of the fan is connected with the buckle plate.

[0010] Preferably, the fan and the buckle plate are provided with an inclination mechanism; the inclination mechanism comprises a fixed block arranged on one side of a support rod, fixed sheets made of elastic material arranged on both sides of the fixed block, a bolt arranged on the fixed block, and a fourth nut threaded on the bolt; the fixed block is mounted on the bottom end of the fan, the fixed sheets are mounted on the top surface of the buckle plate, the fixed sheets and the fixed block are respectively provided with fixed holes which are sleeved on the bolt, the diameter of the bolt matches the hole diameter of the fixed holes, and the fixed sheets are clamped and fixed on the fixed block through the bolt and the fourth nut.

[0011] Preferably, the middle part of the upper clamping ring and the middle part of the lower clamping ring are respectively provided with a clamping groove, and a gasket made of sealing material is sleeved in the clamping groove in an interference fit; the gasket adopts a semi-circular ring structure, and the inner cavity diameter of the gasket is not greater than the inner cavity diameter of the upper clamping ring or the lower clamping ring.

[0012] The utility model has the advantages that: firstly, the upper clamping ring and the lower clamping ring are arranged to be buckled on the high-voltage cable, the fixing plate is arranged to assemble the gas sensor, the light source and the photoresistor on the upper clamping ring, the light source and the photoresistor form a smoke monitoring element, if the high-voltage cable is cracked to generate smoke, the smoke will block the light produced by the light source, the resistance value of the photoresistor is changed, the generation of smoke is quickly monitored, the gas sensor arranged on the fixing plate is used to monitor the strength characteristics of the cable cracking gas, the internal insulation defect degree is monitored in real time, the defect is treated in time, and the cable line accident is avoided.

[0013] Secondly, the fixing tube is clamped on the upper clamping ring through the fixing tube and the second nut, the fixing tube is conveniently disassembled and assembled, the thermistor arranged on the side of the fixing tube close to the lower clamping ring is used to monitor the temperature of the cable, the first spring is arranged to press the thermistor to adhere to the cable clamped between the upper clamping ring and the lower clamping ring, and the stability of the thermistor in monitoring the temperature of the cable is improved.

[0014] Again, the utility model discloses a fan to set up, to accelerate the air flow of high voltage cable periphery, to reduce the temperature of high voltage cable, slow down cable cracking speed, avoid the emergence of failure, through the setting up support rod, second spring and third nut clamping support plate and buckle board with snap ring, to facilitate the fan to be disassembled and assembled.

[0015] In addition, the utility model discloses a gasket to set up, to improve the stability of upper snap ring and lower snap ring clamping fixed on the cable, prevent high voltage cable cracking gas from the end of fixed plate far from the upper snap ring and go out, improve the monitoring effect of high voltage cable cracking gas. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is the structural schematic diagram of the utility model.

[0017] Figure 2 It is the first three -dimensional schematic diagram of the utility model. Figure 1

[0018] Figure 3 It is the first three -dimensional schematic diagram of the utility model.

[0019] Figure 4 It is the second three -dimensional schematic diagram of the utility model. Figure 3

[0020] Figure 5 It is the second three -dimensional schematic diagram of the utility model.

[0021] Figure 6 It is the second three -dimensional schematic diagram of the utility model. Figure 5

[0022] Figure 7 It is the assembly cut -away view of upper snap ring and lower snap ring in the utility model. DETAILED DESCRIPTION

[0023] As Figures 1 to 7 ​​​As shown, a kind of high-voltage cable cracking gas monitoring device, including the upper snap ring 1 of semicircular ring structure, the lower snap ring 2 of semicircular structure is hinged to one end of the upper snap ring 1, and the lower snap ring 2 and the upper snap ring 1 form circular ring structure, the other end of the upper snap ring 1 is locked on the lower snap ring 2, fixed groove 3 is formed on the inner wall of the upper snap ring 1, and n-shaped structure fixing plate 4 is arranged in the fixed groove 3, gas sensor 5, light source 6 and photoresistor 7 are respectively arranged on the fixing plate 4, the gas sensor 5 is installed on the top plate of the fixing plate 4, and the light source 6 and the photoresistor 7 are respectively installed on the inner wall of the fixing plate 4, and the fixing plate 4 is provided with adjusting mechanism;The photosensitive end of the photoresistor 7 is towards the light source 6, and the light source 6 and the photoresistor 7 form smoke monitoring element, by starting the light source 6, so that the light source 6 generates light, and the light generated by the light source 6 is illuminated to the photoresistor 7, and if the high-voltage cable cracking produces smoke, the smoke will shield the light generated by the light source 6, to change the resistance value of the photoresistor 7, so that the generation of smoke is monitored by the light source 6 and the photoresistor 7 quickly;In addition, the gas sensor 5 is used to monitor the gas intensity characteristics of cable cracking, so as to monitor the defect degree of internal insulation, so that the defect is treated in time, and the cable line accident is avoided;The adjusting mechanism includes two screw rods 8 and two screw rods 8, and the first nut 9 is threadedly sleeved on the two screw rods 8, the adjusting slot 10 is formed on the side arm of the upper snap ring 1, one side of the adjusting slot 10 is connected with the fixed groove 3, the two screw rods 8 are sleeved in the adjusting slot 10, and one end of the two screw rods 8 is respectively installed on the two sides of the fixing plate 4, the fixing plate 4 is clamped on the upper snap ring 1 by the first nut 9, one side of the first nut 9 is in contact with the side wall of the upper snap ring 1, by adjusting the clamping position of the screw rod 8, the position of the fixing plate 4 in the fixed groove 3 is adjusted, i.e. the monitoring position of the fixing plate 4 relative to cable is adjusted, so that the gas collection cavity of the cable is created by using the fixing plate 4, the first snap ring 1 and the second snap ring 2 are buckled on the high-voltage cable, so that the joint of the high-voltage cable is located in the inner cavity created by the first snap ring 1 and the second snap ring 2, so that the high-voltage cable cracking gas is transmitted to the gas collection cavity, and the diffusion of the high-voltage cable cracking gas is reduced, and then the gas sensor 5, the light source 6 and the photoresistor 7 are monitored conveniently.

[0024] In the embodiment, the upper clamping ring 1 outside the fixing groove 3 is provided with a stepped sleeve hole 11, the hole diameter of the side of the sleeve hole 11 close to the lower clamping ring 2 is not less than the hole diameter of the side of the sleeve hole 11 far from the lower clamping ring 2, a fixing tube 12 is movably sleeved in the sleeve hole 11, the side of the sleeve hole 11 close to the lower clamping ring 2 is provided with a fixing ring 13, the outer wall diameter of the fixing ring 13 is not less than the hole diameter of the side of the sleeve hole 11 far from the lower clamping ring 2, the end of the fixing tube 12 close to the lower clamping ring 2 is provided with a thermistor 14, the thermistor 14 and the fixing ring 13 are respectively installed on the fixing tube 12, the side of the upper clamping ring 1 far from the lower clamping ring 2 is provided with a second nut 15, the second nut 15 is threadedly sleeved on the fixing tube 12, the fixing tube 12 is clamped on the upper clamping ring 1 through the fixing ring 13 and the second nut 15, one side of the second nut 15 is in contact with the outer wall of the upper clamping ring 1, so that the thermistor 14 is installed on the upper clamping ring 1, so as to monitor the temperature of the cable by using the thermistor 14.

[0025] Specifically, the temperature sensing end of the thermistor 14 faces the lower clamping ring 2, the side of the fixing ring 13 far from the thermistor 14 is provided with a first spring 16, the first spring 16 is located in the side of the sleeve hole 11 close to the lower clamping ring 2, the two sides of the first spring 16 are respectively in contact with the upper clamping ring 1 and the fixing ring 13, so that the first spring 16 is used to press the thermistor 14 to adhere to the cable clamped between the upper clamping ring 1 and the lower clamping ring 2, so as to improve the stability of monitoring the temperature of the cable by using the thermistor 14.

[0026] Please participate again Figure 1 、 3 , 5 and 7, the fixing groove 3 and the adjusting groove 10 are both in the structure of circular ring groove, the center of the fixing groove 3 and the center of the adjusting groove 10 are located on the same axis, so as to adjust the position of the fixing plate 4 in the fixing groove 3, the upper clamping ring 1 on the side of the fixing groove 3 far from the lower clamping ring 2 is provided with a through groove 17, the through groove 17 is opened along the outer wall of the upper clamping ring 1 to the through groove 17, so as to facilitate the discharge of the gas entering the fixing groove 3, and the lead wire enters the through groove 17 to be electrically connected with the gas sensor 5, the light source 6 or the photoresistor 7; the fixing plate 4 is provided with a guide groove 18 on each side, the guide groove 18 is opened on the inner wall of the fixing plate 4, the guide groove 18 is located below the light source 6 or the photoresistor 7, the groove width of the guide groove 18 gradually increases along the direction close to the lower clamping ring 2, so as to facilitate guiding the high-voltage cable cracking gas into the inner cavity formed by the fixing plate 4.

[0027] In this embodiment, the outer side of the upper clamping ring 1 is provided with a fan 19, which is used to accelerate the air flow around the high-voltage cable to reduce the temperature of the high-voltage cable and slow down the cable cracking speed. The fan 19 is provided with a buckle mechanism between the upper clamping ring 1; the buckle mechanism comprises a support plate 20 with an L-shaped cross section arranged on the side away from the adjusting groove 10 of the fixed groove 3, a support rod 21 arranged on the outer side of the support plate 20, a buckle plate 22 arranged on the support rod 21, and a second spring 23 and a third nut 24 arranged in turn on the side away from the support plate 20 of the buckle plate 22. The upper clamping ring 1 is provided with a support groove 25 with an L-shaped cross section, one side of the support plate 20 is sleeved in the support groove 25, the support rod 21 is located outside the upper clamping ring 1, the number of support rods 21 is two, the bottom ends of the two support rods 21 are respectively installed on the support plate 20, the buckle plate 22 is provided with two through holes, the two through holes are respectively sleeved on the support rod 21, the diameter of the support rod 21 is consistent with the hole diameter of the through hole, the third nut 24 is screwed on the support rod 21, the second spring 23 is clamped on the third nut 24 and the buckle plate 22, one side of the buckle plate 22 is in contact with the upper clamping ring 1, and the bottom of the fan 19 is connected with the buckle plate 22. Thus, the second spring 23 is used to press the support plate 20 and the buckle plate 22 on the upper clamping ring 1, so as to facilitate the disassembly and assembly of the fan 19.

[0028] Specifically, the fan 19 and the buckle plate 22 are provided with an inclination mechanism; the inclination mechanism comprises a fixed block 26 arranged on one side of the support rod 21, a fixed sheet 27 made of elastic material arranged on both sides of the fixed block 26, a bolt 28 arranged on the fixed block 26, and a fourth nut 29 threadedly sleeved on the bolt 28. The fixed block 26 is installed on the bottom end of the fan 19, the fixed sheet 27 is installed on the top surface of the buckle plate 22, the fixed sheet 27 and the fixed block 26 are respectively provided with a fixed hole, the fixed hole is sleeved on the bolt 28, the diameter of the bolt 28 is consistent with the hole diameter of the fixed hole, and the fixed sheet 27 is clamped and fixed on the fixed block 26 through the bolt 28 and the fourth nut 29. Thus, by changing the relative fixed position of the fixed block 26 and the fixed sheet 27, the inclination angle of the fan 19 can be adjusted.

[0029] Please refer to Figure 4 and 7 , the middle part of the upper clamping ring 1 and the middle part of the lower clamping ring 2 are respectively provided with a clamping groove 30, and a gasket 31 made of sealing material is interference-fitted in the clamping groove 30. The gasket 31 adopts a semi-circular ring structure, the inner diameter of the gasket 31 is not greater than the inner diameter of the upper clamping ring 1 or the lower clamping ring 2, so as to improve the stability of the upper clamping ring 1 and the lower clamping ring 2 clamped and fixed on the cable, prevent the upper clamping ring 1 and the lower clamping ring 2 from clamping the cable, and prevent the high-voltage cable cracking gas from being transmitted out through the end of the upper clamping ring 1 away from the fixed plate 4.

[0030] The use method of the product is as follows:Figures 1-7 As shown, first, the staff carrying the product to the high-voltage cable joint in the well or power distribution station, by pulling the support plate 20 and buckle plate 22, to buckle the support plate 20 and buckle plate 22 on the upper ring 1, so that the side of the support plate 20 is located in the support groove 25, so that the fan 19 is initially assembled on the upper ring 1, and the fixed tube 12 with the first spring 16 is inserted into the sleeve hole 11, and the fixed ring 13 is located on the side of the upper ring 1 away from the lower ring 2, and the second nut 15 is screwed on the part of the fixed tube 12 penetrating the sleeve hole 11, to preliminarily assemble the thermistor 14 to the upper ring 1. Then, the safety is confirmed, and the monitoring area is in a safe state, and after the confirmation, the upper ring 1 and the lower ring 2 with the gasket 31 are buckled on the high-voltage cable, the position of the fixed plate 4 in the fixed groove 3 is adjusted, and the temperature sensing end of the thermistor 14 is in contact with the high-voltage cable. The first nut 9 and the second nut 15 are screwed to fix the fixed plate 4 and the thermistor 14, so that the gas sensor 5, the light source 6, the photoresistor 7 and the thermistor 14 are convenient for monitoring the high-voltage cable. Finally, the fan 19 is rotated around the bolt 28 by pushing and pulling, and the support plate 20 and the buckle plate 22 are moved, and the position of the fan 19 clamped on the upper ring 1 is fine-tuned, so that the fan 19 can be directed towards the joint of the high-voltage cable, so as to more effectively cool the high-voltage cable; after the adjustment is completed, the third nut 24 and the fourth nut 29 are tightened to fix the fan 19, so as to ensure the stability and accuracy of the monitoring.

[0031] Through the embodiment, the upper ring 1 and the lower ring 2 are arranged to be buckled on the high-voltage cable, and the fixed plate 4 is arranged to assemble the gas sensor 5, the light source 6 and the photoresistor 7 on the upper ring 1, so that the smoke sensing monitoring element is composed of the light source 6 and the photoresistor 7, so that if the high-voltage cable is cracked to produce smoke, the smoke will block the light produced by the light source 6 to change the resistance value of the photoresistor 7, so that the generation of smoke is quickly monitored. The gas sensor 5 arranged on the fixed plate 4 is used to monitor the strength characteristics of the cable cracking gas, so as to monitor the defect degree of the internal insulation in real time, so that the defect is treated in time, and the cable line accident is avoided. Moreover, the screw rod 8 and the first nut 9 are arranged, the position of the fixed plate 4 clamped on the upper ring 1 is adjusted, so that the high-voltage cable cracking gas enters the fixed plate 4, and the gas sensor 5, the light source 6 and the photoresistor 7 are used for monitoring.

[0032] The above-mentioned embodiments are only preferred embodiments of the present application, and are not limited to the scope of the application. Any equivalent changes or modifications made in accordance with the structure, features and principles of the application are included in the scope of the application.

Claims

1. A high-voltage cable cracking gas monitoring device, comprising a semi-circular ring structure of an upper clasp ring (1), one end of the upper clasp ring (1) is hinged with a semi-circular structure of a lower clasp ring (2), the other end of the upper clasp ring (1) is locked on the lower clasp ring (2), characterized in that: The inner wall of the upper clamping ring (1) is provided with a fixing groove (3), and the fixing groove (3) is provided with a n-shaped fixing plate (4), the fixing plate (4) is provided with a gas sensor (5), a light source (6) and a photoresistor (7) respectively, the gas sensor (5) is installed on the top plate of the fixing plate (4), the light source (6) and the photoresistor (7) are installed on the inner wall of the fixing plate (4) respectively, and the fixing plate (4) is provided with an adjusting mechanism. The adjusting mechanism comprises two screw rods (8) and first nuts (9) threadedly sleeved on the two screw rods (8), the side arm of the upper clamping ring (1) is provided with an adjusting groove (10), one side of the adjusting groove (10) is connected with the fixing groove (3), the two screw rods (8) are sleeved in the adjusting groove (10), and one end of the two screw rods (8) is installed on the two sides of the fixing plate (4); and the fixing plate (4) is clamped on the upper clamping ring (1) through the first nuts (9).

2. A monitoring device of high-voltage cable gas discharges according to claim 1, characterized in that: The upper clamping ring (1) outside the fixing groove (3) is provided with a stepped sleeve hole (11), the hole diameter of the side of the sleeve hole (11) close to the lower clamping ring (2) is not less than the hole diameter of the side of the sleeve hole (11) away from the lower clamping ring (2), the sleeve hole (11) movably sleeves a fixing tube (12), the side of the sleeve hole (11) close to the lower clamping ring (2) is provided with a fixing ring (13), the outer wall diameter of the fixing ring (13) is not less than the hole diameter of the sleeve hole (11) away from the lower clamping ring (2), one end of the fixing tube (12) close to the lower clamping ring (2) is provided with a thermistor (14), the thermistor (14) and the fixing ring (13) are installed on the fixing tube (12) respectively, the side of the fixing tube (12) away from the lower clamping ring (2) is provided with a second nut (15), the second nut (15) is threadedly sleeved on the fixing tube (12), the fixing tube (12) is clamped on the upper clamping ring (1) through the fixing ring (13) and the second nut (15), and the side of the second nut (15) is in contact with the outer wall of the upper clamping ring (1).

3. A monitoring device of high-voltage cable gas discharges according to claim 2, characterized in that: The temperature sensing end of the thermistor (14) faces the lower clamping ring (2), the side of the fixing ring (13) away from the thermistor (14) is provided with a first spring (16), the first spring (16) is located in the side of the sleeve hole (11) close to the lower clamping ring (2), and the two sides of the first spring (16) are in contact with the upper clamping ring (1) and the fixing ring (13) respectively.

4. The monitoring device of high-voltage cable gas discharges according to claim 1, characterized by: The fixing groove (3) and the adjusting groove (10) are both circular groove structures, the center of the fixing groove (3) and the center of the adjusting groove (10) are located on the same axis, the upper clamping ring (1) on the side of the fixing groove (3) away from the lower clamping ring (2) is provided with a through groove (17), the through groove (17) is provided along the outer wall of the upper clamping ring (1) to the through groove (17); the two sides of the fixing plate (4) are provided with guide grooves (18) respectively, the guide grooves (18) are provided on the inner wall of the fixing plate (4), the guide grooves (18) are located below the light source (6) or the photoresistor (7), and the groove width of the guide grooves (18) gradually increases along the direction close to the lower clamping ring (2).

5. The monitoring device of high-voltage cable gas discharges according to claim 1, characterized by: The upper clamping ring (1) is provided with a fan (19) on the outer side, and a buckle mechanism is arranged between the fan (19) and the upper clamping ring (1). The buckle mechanism comprises a support plate (20) with an L-shaped cross section arranged on the side away from the adjusting groove (10) of the fixing groove (3), a support rod (21) arranged on the outer side of the support plate (20), a buckle plate (22) arranged on the support rod (21), and a second spring (23) and a third nut (24) arranged in sequence on the side away from the support plate (20) of the buckle plate (22). The upper clamping ring (1) is provided with a support groove (25) with an L-shaped cross section, one side of the support plate (20) is sleeved in the support groove (25), the support rod (21) is located outside the upper clamping ring (1), the number of the support rod (21) is two, the bottom ends of the two support rods (21) are respectively installed on the support plate (20), two through holes are arranged on the buckle plate (22), the two through holes are respectively sleeved on the support rod (21), the third nut (24) is screwed on the support rod (21), the second spring (23) is clamped on the third nut (24) and the buckle plate (22), one side of the buckle plate (22) is in contact with the upper clamping ring (1), and the bottom of the fan (19) is connected with the buckle plate (22).

6. A monitoring device of high-voltage cable gas discharges according to claim 5, characterized in that: An inclination mechanism is arranged between the fan (19) and the buckle plate (22). The inclination mechanism comprises a fixing block (26) arranged on one side of the support rod (21), fixing pieces (27) made of elastic material arranged on both sides of the fixing block (26), a bolt (28) arranged on the fixing block (26), and a fourth nut (29) threadedly sleeved on the bolt (28). The fixing block (26) is installed on the bottom end of the fan (19), the fixing pieces (27) are installed on the top surface of the buckle plate (22), the fixing pieces (27) and the fixing block (26) are respectively provided with fixing holes sleeved on the bolt (28), the diameter of the bolt (28) is consistent with the hole diameter of the fixing hole, and the fixing pieces (27) are clamped and fixed on the fixing block (26) through the bolt (28) and the fourth nut (29).

7. The monitoring device of high-voltage cable gas discharges according to claim 1, characterized by: The middle part of the upper clamping ring (1) and the middle part of the lower clamping ring (2) are respectively provided with a clamping groove (30), and a gasket (31) made of sealing material is interference-fitted in the clamping groove (30). The gasket (31) adopts a semi-circular ring structure, and the inner cavity diameter of the gasket (31) is not greater than the inner cavity diameter of the upper clamping ring (1) or the lower clamping ring (2).

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