High-voltage cable gas monitoring device installation method and device

Abstract

The invention provides a high-voltage cable gas monitoring device installation method and device, and the method comprises the steps: determining the depth of an installation hole according to the specification of a cable, dividing the installation hole into a first hole and a second hole, and presetting at an interval. And the hole sites are arranged at the wave crests of the corrugated metal sheath in the cable. A drill bit is adopted to drill holes according to hole positions and depths, and a first preset speed is initially used and drill bit load is monitored. When the load rises suddenly for the first time, decelerating to a second preset speed; and stopping drilling when the first descending suddenly changes. And then monitoring devices are installed in the first hole and the second hole. According to the method, drilling is accurately controlled by monitoring the load, and the gas source can be judged through multi-point detection. In the whole process, accurate and efficient management of installation of the high-voltage cable gas monitoring device is achieved, and the accuracy and safety of installation are improved.

Description

Technical Field

[0001] This application belongs to the field of cable gas monitoring, and particularly relates to a method and device for installing a high-voltage cable gas monitoring device. Background Art

[0002] As a core component of modern power transmission systems, high-voltage cables play an important role in urbanization processes and areas with complex terrains, undertaking the task of high-capacity and long-distance power transmission. Although its enclosed structure has advantages such as strong anti-interference ability and high space utilization rate, during long-term operation, characteristic gases such as hydrogen and carbon monoxide are likely to be generated due to insulation aging, partial discharge, or mechanical damage. The accumulation of these gases will significantly reduce the insulation performance of the cable, possibly triggering serious accidents such as short circuits and breakdowns, threatening the safety of the power system. Therefore, real-time monitoring of the gases inside the cable has become a key means of early warning.

[0003] The installation of existing sensors relies on empirical drilling operations, which are prone to damaging the cable core due to over-deep drilling or poor airtightness due to insufficient drilling, and defect location cannot be achieved. Summary of the Invention

[0004] The purpose of this application is to overcome the defects in the above-mentioned existing technologies and provide a method and device for installing a high-voltage cable gas monitoring device.

[0005] This application provides a method for installing a high-voltage cable gas monitoring device, including:

[0006] Determine the depth of the installation holes provided on the surface of the high-voltage cable according to the specifications of the high-voltage cable. The installation holes include a first hole and a second hole with a preset interval;

[0007] Set the hole positions of the first hole and the second hole at the peaks of the corrugated metal sheath inside the high-voltage cable;

[0008] Drill holes on the surface of the high-voltage cable using a drill bit according to the hole positions of the first hole and the second hole and the depth of the installation holes, including: setting a first preset drilling speed, drilling according to the first preset drilling speed and monitoring the load of the drill bit in real time; when the load has its first upward mutation, adjust the first preset drilling speed to a second preset drilling speed, where the second preset drilling speed is less than the first preset drilling speed; stop drilling when the load has its first downward mutation;

[0009] Install a high-voltage cable gas monitoring device based on the first hole and the second hole.

[0010] Optionally, the drill bit is provided on a drilling device;

[0011] The drilling device further includes: a fixing frame, a sliding rod, a load sensor, a drive shaft, and a driver;

[0012] The fixing frame is used to fix the drilling device on the surface of the high-voltage cable;

[0013] The sliding rod is arranged on the fixing frame;

[0014] The load sensor is installed at the top of the drill bit. The drill bit is connected to the drive shaft through a fixture, and the drive shaft is connected to the sliding rod through a driver.

[0015] Optionally, a gas sensor is arranged inside the high-voltage cable gas monitoring device, and the gas sensor is used to detect the gas concentration inside the high-voltage cable.

[0016] Optionally, it further includes: determining the gas source according to the gas concentration values near the first hole and the second hole.

[0017] Optionally, installing the high-voltage cable gas monitoring device based on the first hole and the second hole includes:

[0018] Installing threaded gas nozzles in the first hole and the second hole;

[0019] Fixing the high-voltage cable gas monitoring device close to the cable surface;

[0020] Installing two gas connecting pipes connected to the high-voltage cable gas monitoring device onto the two threaded gas nozzles respectively.

[0021] Optionally, the high-voltage cable gas monitoring device includes: a gas piston column, an airtight tube, a gas sensor, a power supply and communication module;

[0022] The two gas connecting pipes are respectively connected to both ends of the airtight tube. The gas piston column is arranged in the inner cavity of the airtight tube, and a plurality of gas sensors are installed on the side wall of the airtight tube. The gas sensors are connected to the power supply and communication module.

[0023] Optionally, the gas sensor includes: a component sensor for monitoring gas components.

[0024] Optionally, the depth of the installation hole is the distance from the side close to the cable core at the peak of the corrugated metal sheath to the surface of the high-voltage cable.

[0025] This application also provides an installation device for a high-voltage cable gas monitoring device, including:

[0026] A measurement module determines the depth of mounting holes provided on the surface of a high-voltage cable according to the specifications of the high-voltage cable. The mounting holes include a first hole and a second hole having a preset interval.

[0027] A position module sets the hole positions of both the first hole and the second hole at the peaks of the corrugated metal sheath inside the high-voltage cable.

[0028] A drilling module drills holes on the surface of the high-voltage cable using a drill bit according to the hole positions of the first hole and the second hole and the depth of the mounting holes, including: setting a first preset drilling speed, drilling according to the first preset drilling speed and monitoring the load of the drill bit in real time; when the load has a first upward mutation, adjusting the first preset drilling speed to a second preset drilling speed, the second preset drilling speed being less than the first preset drilling speed; and stopping drilling when the load has a first downward mutation.

[0029] An installation module installs a high-voltage cable gas monitoring device based on the first hole and the second hole.

[0030] Optionally, in the drilling module, the drill bit is provided on a drilling device.

[0031] The drilling device further includes: a fixing frame, a sliding rod, a load sensor, a drive shaft, and a driver.

[0032] The fixing frame is used to fix the drilling device on the surface of the high-voltage cable.

[0033] The sliding rod is provided on the fixing frame.

[0034] The load sensor is installed at the top of the drill bit. The drill bit is connected to the drive shaft through a fixture, and the driver connected to the drive shaft is connected to the sliding rod.

[0035] Optionally, a gas sensor is provided inside the high-voltage cable gas monitoring device, and the gas sensor is used to detect the gas concentration inside the high-voltage cable.

[0036] Optionally, it further includes: the high-voltage cable gas monitoring device determines the gas source according to the values of the gas concentration near the first hole and the second hole.

[0037] Optionally, the installation module installs the high-voltage cable gas monitoring device based on the first hole and the second hole, including:

[0038] Installing threaded nozzles in the first hole and the second hole;

[0039] Fixing the high-voltage cable gas monitoring device close to the cable surface;

[0040] Connect the two gas connection pipes extended from the high-voltage cable gas monitoring device to the two threaded gas nozzles respectively.

[0041] Optionally, the high-voltage cable gas monitoring device includes: a gas piston column, an airtight tube, a gas sensor, a power supply and communication module;

[0042] The two gas connection pipes are respectively connected to both ends of the airtight tube. The gas piston column is arranged in the inner cavity of the airtight tube. A plurality of gas sensors are installed on the side wall of the airtight tube, and the gas sensors are connected to the power supply and communication module.

[0043] Optionally, the gas sensor includes: a component sensor for monitoring the gas components.

[0044] Optionally, the depth of the installation hole is the distance from the side close to the cable core of the wave crest of the corrugated metal sheath in the high-voltage cable to the surface of the high-voltage cable.

[0045] The beneficial effects of this application are as follows:

[0046] This application provides a method for installing a high-voltage cable gas monitoring device, including: determining the depth of the installation holes provided on the surface of the high-voltage cable according to the specifications of the high-voltage cable. The installation holes include a first hole and a second hole with a preset interval; setting the hole positions of the first hole and the second hole at the wave crests of the corrugated metal sheath inside the high-voltage cable; drilling holes on the surface of the high-voltage cable according to the hole positions of the first hole and the second hole and the depth of the installation holes, including: setting a first preset drilling speed, drilling according to the first preset drilling speed and monitoring the load of the drill bit in real time; when the load has the first upward mutation, adjusting the first preset drilling speed to a second preset drilling speed, and the second preset drilling speed is less than the first preset drilling speed; stopping drilling when the load has the first downward mutation; installing the high-voltage cable gas monitoring device based on the first hole and the second hole. This application realizes precise control of drilling by monitoring the load and judges the gas source through multi-point detection. Description of the Drawings

[0047] Figure 1 is a schematic diagram of the installation process of the high-voltage cable gas monitoring device in this application;

[0048] Figure 2 is a schematic diagram of the high-voltage cable and the drilling device in this application;

[0049] Figure 3 is a schematic diagram of the high-voltage current and the high-voltage cable gas monitoring device in this application;

[0050] Figure 4It is a schematic diagram of the installation device for the high-voltage cable gas monitoring device in this application. Detailed implementation manners

[0051] Hereinafter, exemplary embodiments of the present disclosure will be described in more detail with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the drawings, it can be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, the embodiments are provided so that the present disclosure can be more thoroughly understood and the scope of the present disclosure can be fully conveyed to those skilled in the art.

[0052] Please refer to Figures 1 to 3 As shown, a method for installing a high-voltage cable gas monitoring device provided in this application includes:

[0053] S101. Determine the depth of the installation holes provided on the surface of the high-voltage cable according to the specifications of the high-voltage cable. The installation holes include a first hole and a second hole with a preset interval.

[0054] The high-voltage cable in this application refers to a power cable specifically designed for transmitting electrical energy at a high voltage level.

[0055] As Figure 2 shown, the high-voltage cable is divided into 6 layers from the inside to the outside, including: a cable core 1, a semi-conductive shielding layer 2, a buffer layer 3, a corrugated metal sheath 4, and an outer sheath 5.

[0056] There is also an insulating layer in the semi-conductive shielding layer 2. In a high-voltage cable, electric field distortion will cause the growth of electrical tree branches. The tips of the electrical tree branches continuously discharge, resulting in the chemical decomposition of the insulating layer, and then generating gas substances, which affects the insulation performance of the high-voltage cable. To monitor the gas concentration in the high-voltage cable, installation holes need to be drilled on the high-voltage cable to obtain gas information.

[0057] As Figure 2 shown, the drilling device includes a fixing frame 7, a sliding rod 8, a drill bit 9, and a load sensor 10.

[0058] The fixing frame 7 is used to fix the drilling device on the surface of the high-voltage cable. The sliding rod 8 is installed on the fixing frame 7, and the sliding rod 8 is used for the drill bit 9 to perform sliding displacement during the drilling operation.

[0059] The load sensor 10 is installed on the top of the drill bit 9 to detect the load borne by the drill bit 9.

[0060] To detect gas information, the depth of the installation hole 6 needs to penetrate the outer sheath 5 and the corrugated metal sheath 4. Therefore, obtain the specifications of the high-voltage cable, determine the thicknesses of the outer sheath 5 and the corrugated metal sheath 4 according to the specifications, and then determine the depth of the installation hole.

[0061] S102. Set the hole positions of the first hole and the second hole at the peaks of the corrugated metal sheath inside the high-voltage cable;

[0062] The corrugated metal sheath 4 has periodic corrugations, where the peaks and valleys are at different distances from the cable core 1. The material accumulation in the peak area is thicker, which can provide higher mechanical strength and sealing performance. At the same time, to prevent the drill bit from touching the insulation layer when drilling holes, the positions of the displacement mounting holes 6 are selected at the peak positions.

[0063] Furthermore, assuming the diffusion rate of gas in the gap between the corrugated metal sheath 4 and the insulation layer is vd, the spacing needs to satisfy L≥2vd*ts (ts is the sensor response time) to avoid data overlap caused by diffusion delay of the gas samples collected by the two holes.

[0064] The spacing L is an integer multiple of the period P of the corrugated metal sheath 4 to ensure that both holes are located at the peaks.

[0065] S103. Drill holes on the surface of the high-voltage cable with a drill bit according to the hole positions of the first hole and the second hole and the depth of the mounting hole, including: setting a first preset drilling speed, drilling according to the first preset drilling speed and monitoring the load of the drill bit in real time; when the load has the first upward mutation, adjusting the first preset drilling speed to a second preset drilling speed, where the second preset drilling speed is less than the first preset drilling speed; stopping drilling when the load has the first downward mutation;

[0066] It should be noted that the drill bit 9 is installed in the fixture at the end of the spindle of the drilling machine, and this fixture is used to fix the drill bit and transmit rotational power. The load sensor 10 is installed at the connection between the drill bit and the drilling machine spindle to display the axial pressure received by the drill bit in real time.

[0067] In the initial stage of drilling, the descending speed of the drill bit 9 is the first preset drilling speed. For example: 1 mm / min. The first preset drilling speed can enable the drill bit 9 to quickly penetrate the outer sheath 5 of the cable and approach the corrugated metal sheath 4.

[0068] When the load sensor 10 shows that the load suddenly increases, it is considered as the first upward mutation. Specifically, when the drill bit 9 touches the peak of the corrugated metal sheath, since the materials of the outer sheath 5 and the corrugated metal sheath 4 are different and the hardness of the corrugated metal sheath 4 is greater than that of the outer sheath 5, the load will have an upward mutation.

[0069] When the first upward mutation of the load is detected, the descending speed of the drill bit 9 will decrease from the first preset drilling speed to the second preset drilling speed. For example, the descending rate is adjusted from 1 mm / min to 0.1 mm / min. It should be clear that the second preset drilling speed is less than the first preset drilling speed. This speed change can avoid excessive cutting of the aluminum sheath due to too fast drilling speed.

[0070] When the load sensor 10 shows that the load suddenly decreases, it is considered as the first downward mutation of the load. Similarly, the load downward mutation occurs when the corrugated metal sheath 4 is penetrated, which is caused by the drill bit contacting materials with different hardness. At this time, the drilling is immediately stopped.

[0071] The same steps are executed twice to analyze the first hole and the second hole drilled.

[0072] S104. Install the high-voltage cable gas monitoring device based on the first hole and the second hole.

[0073] After drilling two installation holes 6 on the surface of the high-voltage cable according to the preset installation hole depth and preset interval, install the high-voltage cable gas monitoring device on the first hole and the second hole.

[0074] As Figure 3 shown, the high-voltage cable gas monitoring device includes: a gas connection pipe 12, a gas piston column 13, an airtight pipe 14, a gas collection box 15, a gas sensor 16, and a power supply and communication module 17.

[0075] The gas collection box 15 is in the shape of a cylindrical long column and is fixed on the surface of the high-voltage cable. The power supply and communication module 17 is arranged on the gas collection box 15.

[0076] An airtight pipe 14 is further arranged inside the gas collection box 15. A gas piston column 13 is arranged inside the airtight pipe 14. A plurality of gas sensors 16 are arranged on the inner surface of the airtight pipe 14. The gas sensors 16 include a gas concentration sensor and a gas component sensor.

[0077] One gas connection pipe 12 is respectively connected to the axial two end faces of the gas collection box 15. One end of the gas connection pipe 12 is connected to the airtight pipe 14, and the other end is connected to the first hole or the second hole.

[0078] When the gas connection pipe 12 is connected to the installation hole 6, a threaded gas nozzle 11 is first installed on the installation hole 6, and then the threaded gas nozzle 11 is connected to the gas connection pipe 12.

[0079] Please refer to Figure 4 shown, the present application also provides an installation device for a high-voltage cable gas monitoring device. The device includes:

[0080] The measuring module 201 determines the depth of the mounting holes provided on the surface of the high-voltage cable according to the specifications of the high-voltage cable. The mounting holes include a first hole and a second hole with a preset interval.

[0081] The high-voltage cable is divided into six layers from the inside to the outside, including: a cable core 1, a semiconductive shielding layer 2, a buffer layer 3, a corrugated metal sheath 4, and an outer sheath 5. There is also an insulating layer in the semiconductive shielding layer 2.

[0082] In a high-voltage cable, electric field distortion will trigger the growth of electrical tree branches. The tip of the electrical tree discharges continuously, causing chemical decomposition of the insulating layer, and then generating gaseous substances, which affects the insulation performance of the high-voltage cable. To monitor the gas concentration in the high-voltage cable, mounting holes need to be drilled on the high-voltage cable to obtain gas information.

[0083] The drilling device includes a fixing frame 7, a sliding rod 8, a drill bit 9, and a load sensor 10.

[0084] The fixing frame 7 is used to fix the drilling device on the surface of the high-voltage cable. The sliding rod 8 is installed on the fixing frame 7, and the sliding rod 8 is used for the drill bit 9 to perform sliding displacement during the drilling operation.

[0085] The load sensor 10 is installed on the top of the drill bit 9 to detect the load borne by the drill bit 9.

[0086] To detect gas information, the depth of the mounting holes needs to penetrate through the outer sheath 5 and the corrugated metal sheath 4. Therefore, obtain the specifications of the high-voltage cable, determine the thicknesses of the outer sheath 5 and the corrugated metal sheath 4 according to the specifications, and then determine the depth of the mounting holes.

[0087] The position module 202 sets the hole positions of both the first hole and the second hole at the peaks of the inner corrugated metal sheath of the high-voltage cable.

[0088] The corrugated metal sheath 4 has periodic corrugations, and the distances from the peaks and valleys to the cable core 1 are different. The material accumulation in the peak region is thicker, which can provide higher mechanical strength and sealing performance. At the same time, to prevent the drill bit 9 from touching the insulating layer during drilling, the peak position is selected as the position of the mounting hole.

[0089] Further, assuming that the diffusion rate of gas in the gap between the corrugated metal sheath 4 and the insulating layer is vd, the spacing needs to satisfy L≥2vd*ts (ts is the sensor response time) to avoid data overlap caused by diffusion delay of the gas samples collected by the two holes. The spacing L is an integer multiple of the period P of the corrugated metal sheath 4 to ensure that both holes are located at the peaks.

[0090] The drilling module 203 drills holes on the surface of the high-voltage cable using a drill bit according to the hole position and the depth of the mounting hole, including: setting a first preset drilling speed, drilling according to the first preset drilling speed and monitoring the load of the drill bit in real time; when the load has a first upward mutation, adjusting the first preset drilling speed to a second preset drilling speed, where the second preset drilling speed is less than the first preset drilling speed; stopping drilling when the load has a first downward mutation.

[0091] The drill bit 9 is installed in a fixture at the end of the main shaft of the drilling machine, and this fixture is used to fix the drill bit 9 and transmit rotational power. The load sensor 10 is installed at the connection between the chuck and the main shaft of the drilling machine, and it displays the axial pressure received by the drill bit 9 in real time.

[0092] In the initial stage of drilling, the descending speed of the drill bit 9 is the first preset drilling speed. For example: 1 mm / min. The first preset drilling speed can enable the drill bit 9 to quickly penetrate the outer sheath 5 of the cable and approach the corrugated metal sheath 4.

[0093] When the load sensor 10 shows that the load suddenly increases, it is considered the first upward mutation. Specifically, when the drill bit 9 contacts the peak of the corrugated metal sheath 4, since the materials of the outer sheath 5 and the corrugated metal sheath 4 are different, and the hardness of the corrugated metal sheath 4 is greater than that of the outer sheath 5, the load will have an upward mutation.

[0094] When it is monitored that there is a first upward mutation in the load, the descending speed of the drill bit 9 will drop from the first preset drilling speed to the second preset drilling speed. For example: the descending rate will be adjusted from 1 mm / min to 0.1 mm / min. It should be clear that the second preset drilling speed is less than the first preset drilling speed. This speed change can avoid excessive cutting of the aluminum sheath due to too fast drilling speed.

[0095] When the load sensor 10 shows that the load suddenly decreases, it is considered the first downward mutation of the load. Similarly, the load downward mutation occurs when the corrugated metal sheath 4 is penetrated, which is caused by the drill bit 9 contacting materials with different hardnesses. At this time, stop drilling immediately.

[0096] Execute the same steps twice to analyze the first hole and the second hole drilled.

[0097] The installation module 204 installs the high-voltage cable gas monitoring device based on the first hole and the second hole.

[0098] After drilling two mounting holes 6 on the surface of the high-voltage cable according to the preset depth of the mounting hole 6 and the preset interval, install the high-voltage cable gas monitoring device on the first hole and the second hole.

[0099] The high-voltage cable gas monitoring device includes: a gas connection pipe 12, a gas piston column 13, an airtight pipe 14, a gas collection box 15, a gas sensor 16, and a power supply and communication module 17.

[0100] The gas collection box 15 is in the shape of a long cylindrical barrel and is fixed on the surface of the high-voltage cable. The power supply and communication module 17 is mounted on the gas collection box 15.

[0101] An airtight pipe 14 is further provided inside the gas collection box 15. A gas piston column 13 is provided inside the airtight pipe 14. A plurality of gas sensors 16 are provided on the inner surface of the airtight pipe 14. The gas sensors 16 include a gas concentration sensor and a gas composition sensor.

[0102] One gas connection pipe 12 is connected to each of the axial end faces of the gas collection box 15. One end of the gas connection pipe 12 is connected to the airtight pipe 14, and the other end is connected to the first hole or the second hole.

[0103] When the gas connection pipe 12 is connected to the installation hole, a threaded gas nozzle 11 is first installed on the installation hole, and then the threaded gas nozzle 11 is connected to the gas connection pipe 12.

[0104] The above description of the embodiments is to enable those of ordinary skill in the art to understand and apply the present invention. It is obvious that those skilled in the art can easily make various modifications to the above embodiments and apply the general principles described herein to other embodiments without creative labor. Therefore, the present invention is not limited to the above embodiments, and all improvements and modifications made by those skilled in the art based on the disclosure of the present invention should fall within the protection scope of the present invention.

Claims

1. A method for installing a high-voltage cable gas monitoring device, characterized in that: include: Determining the depth of a mounting hole provided on a surface of the high-voltage cable according to the specification of the high-voltage cable, wherein the mounting hole comprises a first hole and a second hole having a preset interval; The first hole and the second hole are both arranged at the crest of the corrugated metal sheath in the high-voltage cable; According to the hole positions of the first hole and the second hole and the depth of the mounting hole, drilling a hole on the surface of the high-voltage cable using a drill bit includes: setting a first preset drilling speed, drilling a hole according to the first preset drilling speed and monitoring the load of the drill bit in real time; when the load undergoes a first sudden increase, adjusting the first preset drilling speed to a second preset drilling speed, the second preset drilling speed being less than the first preset drilling speed; and stopping drilling when the load undergoes a first sudden decrease; A high-voltage cable gas monitoring device is installed based on the first hole and the second hole.

2. A method for installing a high-voltage cable gas monitoring device according to claim 1, characterized in that: The drill bit is arranged on the drilling device; The drilling device also includes: a fixed frame, a slide rod, a load sensor, a drive shaft and a driver; The fixing frame is used to fix the drilling device on the surface of the high-voltage cable; The sliding rod is arranged on the fixing frame; The load sensor is installed on the top of the drill bit, the drill bit is connected to the driving shaft through a clamp, and the driving shaft is connected to the sliding rod through the driver.

3. A method for installing a high-voltage cable gas monitoring device according to claim 1, characterized in that: A gas sensor is arranged inside the high-voltage cable gas monitoring device, and the gas sensor is used to detect the gas concentration inside the high-voltage cable.

4. A method for installing a high-voltage cable gas monitoring device according to claim 3, characterized in that: Also includes: The gas source is determined according to the values ​​of the gas concentration near the first hole and the second hole.

5. A method for installing a high-voltage cable gas monitoring device according to claim 1, characterized in that: A high-voltage cable gas monitoring device is installed based on the first hole and the second hole, comprising: Installing threaded gas nozzles in the first hole and the second hole; Fixing the high-voltage cable gas monitoring device close to the cable surface; The two gas connecting pipes connected to the high-voltage cable gas monitoring device are respectively installed on the two threaded gas nozzles.

6. A method for installing a high-voltage cable gas monitoring device according to claim 5, characterized in that: The high-voltage cable gas monitoring device comprises: a gas piston column, an airtight tube, a gas sensor, a power supply and communication module; The two gas connecting pipes are respectively connected to the two ends of the airtight pipe, the gas piston column is arranged in the inner cavity of the airtight pipe, and a plurality of gas sensors are installed on the side wall of the airtight pipe, and the gas sensors are connected to the power supply and communication module.

7. A method for installing a high-voltage cable gas monitoring device according to claim 3 or 6, characterized in that: The gas sensor comprises: a component sensor for monitoring gas components.

8. A method for installing a high-voltage cable gas monitoring device according to claims 1 to 6, characterized in that: The depth of the installation hole is the distance from the crest of the corrugated metal sheath close to the high-voltage cable core to the surface of the high-voltage cable.

9. A high voltage cable gas monitoring device installation device, characterized in that: include: A measuring module, which determines the depth of a mounting hole provided on a surface of the high-voltage cable according to the specification of the high-voltage cable, wherein the mounting hole includes a first hole and a second hole having a preset interval; A position module, which sets the positions of the first hole and the second hole at the crests of the corrugated metal sheath in the high-voltage cable; A drilling module, according to the hole positions of the first hole and the second hole and the depth of the mounting hole, uses a drill bit to drill holes on the surface of the high-voltage cable, including: setting a first preset drilling speed, drilling according to the first preset drilling speed and monitoring the load of the drill bit in real time; when the load undergoes a first sudden increase, adjusting the first preset drilling speed to a second preset drilling speed, the second preset drilling speed being less than the first preset drilling speed; and stopping drilling when the load undergoes a first sudden decrease; An installation module is used to install a high-voltage cable gas monitoring device based on the first hole and the second hole.

10. A high-voltage cable gas monitoring device installation device according to claim 9, characterized in that: In the drilling module, the drill bit is arranged on a drilling device; The drilling device also includes: a fixed frame, a slide rod, a load sensor, a drive shaft and a driver; The fixing frame is used to fix the drilling device on the surface of the high-voltage cable; The sliding rod is arranged on the fixing frame; The load sensor is installed on the top of the drill bit, the drill bit is connected to the driving shaft through a clamp, and the driving shaft is connected to the sliding rod through the driver.

11. A high-voltage cable gas monitoring device installation device according to claim 9, characterized in that: A gas sensor is arranged inside the high-voltage cable gas monitoring device, and the gas sensor is used to detect the gas concentration inside the high-voltage cable.

12. A high-voltage cable gas monitoring device installation device according to claim 11, characterized in that: Also includes: The high-voltage cable gas monitoring device determines the source of the gas based on the values ​​of the gas concentration near the first hole and the second hole.

13. A high-voltage cable gas monitoring device installation device according to claim 9, characterized in that: The installation module installs the high-voltage cable gas monitoring device based on the first hole and the second hole, including: Installing threaded gas nozzles in the first hole and the second hole; Fixing the high-voltage cable gas monitoring device close to the cable surface; The two gas connecting pipes extending from the high-voltage cable gas monitoring device are respectively installed on the two threaded gas nozzles.

14. A high-voltage cable gas monitoring device installation device according to claim 13, characterized in that: The high-voltage cable gas monitoring device comprises: a gas piston column, an airtight tube, a gas sensor, a power supply and communication module; The two gas connecting pipes are respectively connected to the two ends of the airtight pipe, the gas piston column is arranged in the inner cavity of the airtight pipe, and a plurality of gas sensors are installed on the side wall of the airtight pipe, and the gas sensors are connected to the power supply and communication module.

15. A high-voltage cable gas monitoring device installation device according to claim 11 or 14, characterized in that: The gas sensor comprises: a component sensor for monitoring gas components.

16. A high voltage cable gas monitoring device installation device according to claims 9 to 14, characterized in that: The depth of the installation hole is the distance from the crest of the corrugated metal sheath close to the high-voltage cable core to the surface of the high-voltage cable.

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