A discharge monitoring device for extra-high voltage GIL

Abstract

The application discloses a kind of ultrahigh voltage GIL discharge monitoring devices, including shell, the upper portion of the shell is equipped with servo motor, servo motor output shaft is inserted into shell and is connected with the rolling contact of GIL shell walking mechanism;The two opposite sides of the shell are equipped with connecting frame, and the connecting frame of one side is equipped with monitoring module, monitoring module is close to GIL shell, and the connecting frame is two side plates with hollow, the inner side of connecting frame is rotatably connected with the first pressing member and the second pressing member around GIL shell by pin shaft;The connecting frame is also provided with drive mechanism for making first pressing member or second pressing member and GIL shell rolling contact.The application realizes the global partial discharge detection of GIL surface, and is flexible and convenient to use, and can also be applied to different specifications of GIL shell, and the application scene is widely used.

Description

Technical Field

[0001] This invention relates to the field of ultra-high voltage GIL technology, specifically to an ultra-high voltage GIL discharge monitoring device. Background Technology

[0002] Gas-insulated transmission lines (GILs) are high-voltage, high-current power transmission equipment that uses compressed gas (such as SF6 or SF6 mixtures) as insulation material, with the outer shell and conductor arranged coaxially. Since GILs are primarily composed of metallic conductors and lack moving parts such as circuit breakers and disconnectors, internal faults are typically insulation faults. If partial discharge or ground flashover occurs in a GIL, the large size of the gas chamber prevents noticeable external changes, making the discharge characteristics difficult to detect immediately. Existing UHV GIL partial discharge monitoring devices are usually located inside the shell, but the number of monitoring sensors is limited, the monitoring area is restricted, and subsequent replacement and maintenance are difficult. Manual monitoring using handheld ultrasonic sensors on the GIL shell is also possible, but this is labor-intensive, carries certain risks, and is prone to missing defects. All these monitoring methods have drawbacks. Therefore, there is an urgent need for a discharge monitoring device capable of comprehensive and flexible monitoring of UHV GILs. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to overcome the existing defects and provide an ultra-high voltage GIL discharge monitoring device that can realize full-domain partial discharge detection of GIL, is flexible and convenient to use, and can be applied to GIL enclosures of different specifications. It has a wide range of applications and can effectively solve the problems in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: an ultra-high voltage GIL discharge monitoring device, comprising a housing, a servo motor being provided on the upper part of the housing, the output shaft of the servo motor extending into the housing and connected to a traveling mechanism that rolls against the GIL shell; connecting frames are provided on both opposite sides of the housing, one of the connecting frames being provided with a monitoring module, the monitoring module being close to the GIL shell; the connecting frame consists of two hollow side plates, and the inner sides of the connecting frame are rotatably connected to a first clamping member and a second clamping member surrounding the GIL shell via pins; the connecting frame is also provided with a driving mechanism for causing the first or second clamping member to roll against the GIL shell;

[0005] When the drive mechanism causes the first clamping member to roll against the GIL housing, the servo motor drives the walking mechanism to rotate to be perpendicular to the axis of the GIL housing. The walking mechanism moves and moves circumferentially along the GIL housing, thereby causing the monitoring module to move circumferentially along the GIL housing.

[0006] When the drive mechanism causes the second clamping member to roll against the GIL housing, the servo motor drives the walking mechanism to rotate to be parallel to the axis of the GIL housing. The walking mechanism moves and moves along the axis of the GIL housing, thereby causing the monitoring module to move along the axis of the GIL housing.

[0007] Preferably, the walking mechanism is a hub motor, which is connected to the output shaft of the servo motor via a wheel frame.

[0008] Preferably, the first clamping member includes a first arc-shaped arm, one end of which is rotatably connected to a pin, and the other end of which is provided with a roller, which is perpendicular to the axis of the GIL housing.

[0009] Preferably, the second clamping member includes a second arc-shaped arm, one end of which is rotatably connected to a pin, and the other end of which is provided with a second roller, which is parallel to the axis of the GIL housing.

[0010] Preferably, the shaft of the pin is provided with a fixing sleeve for spacing the first arc-shaped arm and the second arc-shaped arm.

[0011] Preferably, both sides of the shaft of the pin are provided with torsion springs, one end of the torsion spring is connected to the side plate of the connecting frame, and the other end of the torsion spring abuts against the first arc arm or the second arc arm and prevents roller one or roller two from contacting the GIL housing.

[0012] Preferably, the drive mechanism includes a motor, the output end of which is connected to a lead screw. The lead screw passes through two side plates of the connecting frame and is rotatably connected to the side plates. The body of the lead screw is fitted with a cam that acts on the first arc-shaped arm or the second arc-shaped arm. The cam is fixed to the lead screw by two nuts.

[0013] Preferably, the monitoring module includes a circuit board and an ultrasonic sensor integrated on the circuit board.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: When the drive mechanism causes the first clamping member to roll into contact with the GIL shell, the servo motor rotates the walking mechanism to be perpendicular to the axis of the GIL shell. At this time, both rollers and the hub motor are in contact with the GIL shell. The hub motor rotates circumferentially around the GIL shell, thereby driving the monitoring module to rotate circumferentially around the GIL shell, realizing circumferential partial discharge monitoring of the GIL. When the drive mechanism causes the second clamping member to roll into contact with the GIL shell, the servo motor rotates the walking mechanism to be parallel to the axis of the GIL shell. At this time, both rollers and the hub motor are in contact with the GIL shell. The hub motor moves along the axis of the GIL shell, thereby driving the monitoring module to move circumferentially around the axis of the GIL shell. By moving the GIL shell circumferentially and moving the axis, full-area partial discharge detection of the GIL is realized. It is flexible and convenient to use, and can also be applied to GIL shells of different specifications, with a wide range of application scenarios. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the present invention;

[0016] Figure 2 This is a schematic diagram of an embodiment of the present invention. Figure 1 ;

[0017] Figure 3 for Figure 2 Side view;

[0018] Figure 4 This is a schematic diagram of an embodiment of the present invention. Figure 2 ;

[0019] Figure 5 for Figure 4 Side view.

[0020] In the diagram: 1 Servo motor, 2 Housing, 3 Walking mechanism, 4 Connecting frame, 5 Drive mechanism, 5.1 Cam, 5.2 Nut, 5.3 Motor, 6 First clamping component, 6.1 First arc arm, 6.2 Roller 1, 7 Second clamping component, 7.1 Second arc arm, 7.2 Roller 2, 8 Monitoring module, 9 Torsion spring, 10 Pin. Implementation

[0021] The technical solution of the present invention will now be described with reference to the accompanying drawings of the embodiments of the present invention. In the description, it should be understood that the terms "upper," "lower," "front," "rear," "left," and "right," etc., indicating directions or positional relationships, are only used to correspond to the accompanying drawings of the present invention for the purpose of facilitating the description of the present invention, and are not intended to indicate or imply that the device or element referred to must have a specific orientation.

[0022] Please see Figure 1-5 This invention provides a technical solution: an ultra-high voltage GIL discharge monitoring device, comprising a housing 2, a servo motor 1 on the upper part of the housing 2, the output shaft of the servo motor 1 extending into the housing 2 and connected to a traveling mechanism 3 that rolls against the GIL shell; connecting frames 4 are provided on both opposite sides of the housing 2, one of the connecting frames 4 is provided with a monitoring module 8, the monitoring module 8 is close to the GIL shell and is used to monitor the discharge characteristics of the GIL shell; the connecting frame 4 has two hollow side plates, and the inner side of the connecting frame 4 is rotatably connected to a first clamping member 6 and a second clamping member 7 surrounding the GIL shell through a pin 10; the connecting frame 4 is also provided with a driving mechanism 5 for rolling against the GIL shell by the first clamping member 6 or the second clamping member 7;

[0023] like Figure 2 and Figure 3As shown, when the drive mechanism 5 causes the first clamping member 6 to roll against the GIL shell, the first clamping member 6 includes a first arc-shaped arm 6.1. One end of the first arc-shaped arm 6.1 is rotatably connected to the pin shaft 10, and the other end of the first arc-shaped arm 6.1 is provided with a roller 6.2. The roller 6.2 is perpendicular to the axis of the GIL shell. The servo motor 1 drives the walking mechanism 3 to rotate to be perpendicular to the axis of the GIL shell. The walking mechanism 3 moves and moves circumferentially along the GIL shell, thereby causing the monitoring module 8 to move circumferentially along the GIL shell. The walking mechanism 3 is a hub motor. The hub motor is connected to the output shaft of the servo motor 1 through a wheel frame. That is, the servo motor 1 rotates the walking mechanism 3 to be perpendicular to the axis of the GIL shell. At this time, the two rollers 6.2 and the hub motor are in contact with the GIL shell, forming a three-point fixation. The hub motor rotates circumferentially along the GIL shell, thereby driving the monitoring module 8 to rotate circumferentially around the GIL shell, realizing the circumferential partial discharge monitoring of the GIL.

[0024] like Figure 4 and Figure 5 As shown, when the drive mechanism 5 causes the second clamping member 7 to roll against the GIL shell, the second clamping member 7 includes a second arc-shaped arm 7.1. One end of the second arc-shaped arm 7.1 is rotatably connected to the pin shaft 10, and the other end of the second arc-shaped arm 7.1 is provided with a roller 7.2. The roller 7.2 is parallel to the axis of the GIL shell. The servo motor 1 drives the walking mechanism 3 to rotate to be parallel to the axis of the GIL shell. The walking mechanism 3 moves and moves along the axis of the GIL shell, thereby causing the monitoring module 8 to move along the axis of the GIL shell. The walking mechanism 3 is a hub motor. The hub motor is connected to the output shaft of the servo motor 1 through the wheel frame. That is, the servo motor 1 rotates the walking mechanism 3 to be parallel to the axis of the GIL shell. At this time, both rollers 7.2 and the hub motor are in contact with the GIL shell. The hub motor moves along the axis of the GIL shell, thereby driving the monitoring module 8 to move along the axis of the GIL shell. By moving the GIL shell circumferentially and moving along the axis, the full-area partial discharge detection of GIL is realized. It is flexible and convenient to use and can also be applied to GIL shells of different specifications. It has a wide range of applications.

[0025] Furthermore, the shaft of the pin 10 is provided with a fixing sleeve for separating the first arc-shaped arm 6.1 and the second arc-shaped arm 7.1, so that the first arc-shaped arm 6.1 and the second arc-shaped arm 7.1 are separated and do not interfere with each other;

[0026] Furthermore, torsion springs 9 are provided on both sides of the shaft of pin 10. One end of the torsion spring 9 is connected to the side plate of the connecting frame 4, and the other end of the torsion spring 9 abuts against the first arc arm 6.1 or the second arc arm 7.1, preventing roller 6.2 or roller 7.2 from contacting the GIL housing. By using the torsion spring 9 to prevent roller 6.2 or roller 7.2 from contacting the GIL housing, that is, when the drive mechanism 5 causes roller 6.2 to roll and abut against the GIL housing, roller 7.2 does not contact the GIL housing, thus avoiding contact and friction between roller 7.2 and the GIL housing during the overall rotational movement, which would affect the rotational movement; similarly, when roller 7.2 rolls and contacts the GIL housing, roller 6.2 does not contact the GIL housing, thus avoiding contact and friction between roller 6.2 and the GIL housing during the overall axis movement, which would affect the axis movement.

[0027] Specifically, such as Figure 2 and Figure 4 As shown, the drive mechanism 5 includes a motor 5.3. The output end of the motor 5.3 is connected to a lead screw. The lead screw passes through the two side plates of the connecting frame 4 and is rotatably connected to the side plates. The body of the lead screw is sleeved with a cam 5.1 that acts on the first arc-shaped arm 6.1 or the second arc-shaped arm 7.1. The motor 5.3 drives the lead screw to rotate, and the lead screw drives the cam 5.1 to rotate, so that the cam 5.1 abuts against the first arc-shaped arm 6.1 or the second arc-shaped arm 7.1 and makes it swing around the pin 10, thereby causing the roller 6.2 or the roller 7. 2. Contacting the GIL housing, cam 5.1 is fixed to the lead screw by two nuts 5.2, that is, cam 5.1 is fixed in the corresponding position by two nuts 5.2. Cam 5.1 can be fixed in the position corresponding to the first arc arm 6.1. When motor 5.3 is activated, cam 5.1 causes the first arc arm 6.1 to swing. Cam 5.1 can be fixed in the position corresponding to the second arc arm 7.1. When motor 5.3 is activated, cam 5.1 causes the second arc arm 7.1 to swing.

[0028] In addition, the monitoring module 8 includes a circuit board and an ultrasonic sensor integrated on the circuit board, which monitors the discharge phenomenon by monitoring sound waves.

[0029] The parts of this invention not described in detail are prior art. It will be apparent to those skilled in the art that this invention is not limited to the details of the above exemplary embodiments, and that the invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the above embodiments should be regarded as exemplary and non-limiting in all respects. The scope of this invention is defined by the appended claims rather than the foregoing description. Therefore, it is intended to include all changes that fall within the meaning and scope of the equivalents of the claims within this invention, and no reference numerals in the claims should be regarded as limiting the content of the claims.

Claims

1. A super-high voltage GIL discharge monitoring device, comprising a housing (2), characterized in that: The upper part of the housing (2) is provided with a servo motor (1), the output shaft of the servo motor (1) extends into the housing (2) and is connected to a walking mechanism (3) that rolls against the GIL shell; the two opposite sides of the housing (2) are provided with connecting frames (4), one of the connecting frames (4) is provided with a monitoring module (8), the monitoring module (8) is close to the GIL shell, the connecting frame (4) is two hollow side plates, and the inner side of the connecting frame (4) is rotatably connected to a first clamping member (6) and a second clamping member (7) surrounding the GIL shell through a pin (10); the connecting frame (4) is also provided with a drive mechanism (5) for rolling against the GIL shell by the first clamping member (6) or the second clamping member (7). When the drive mechanism (5) causes the first clamping member (6) to roll against the GIL shell, the servo motor (1) drives the walking mechanism (3) to rotate to be perpendicular to the axis of the GIL shell. The walking mechanism (3) moves and moves along the circumference of the GIL shell, and the monitoring module (8) moves along the circumference of the GIL shell. When the drive mechanism (5) causes the second clamping member (7) to roll against the GIL shell, the servo motor (1) drives the walking mechanism (3) to rotate to be parallel to the axis of the GIL shell. The walking mechanism (3) moves and moves along the axis of the GIL shell, and the monitoring module (8) moves along the axis of the GIL shell. The first clamping member (6) includes a first arc-shaped arm (6.1), one end of which is rotatably connected to the pin (10), and the other end of which is provided with a roller (6.2), which is perpendicular to the axis of the GIL housing; the second clamping member (7) includes a second arc-shaped arm (7.1), one end of which is rotatably connected to the pin (10), and the other end of which is provided with a roller (7.2), which is parallel to the axis of the GIL housing; The drive mechanism (5) includes a motor (5.3), the output end of which is connected to a lead screw. The lead screw passes through the two side plates of the connecting frame (4) and is rotatably connected to the side plates. The body of the lead screw is fitted with a cam (5.1) that acts on the first arc arm (6.1) or the second arc arm (7.1). The cam (5.1) is fixed to the lead screw by two nuts (5.2).

2. The ultra-high voltage GIL discharge monitoring device according to claim 1, characterized in that: The walking mechanism (3) is a hub motor, which is connected to the output shaft of the servo motor (1) through a wheel frame.

3. The ultra-high voltage GIL discharge monitoring device according to claim 1, characterized in that: The shaft of the pin (10) is provided with a fixing sleeve for spacing the first arc arm (6.1) and the second arc arm (7.1).

4. The ultra-high voltage GIL discharge monitoring device according to claim 1, characterized in that: Both sides of the shaft of the pin (10) are provided with torsion springs (9). One end of the torsion spring (9) is connected to the side plate of the connecting frame (4), and the other end of the torsion spring (9) abuts against the first arc arm (6.1) or the second arc arm (7.1) and prevents the roller one (6.2) or roller two (7.2) from contacting the GIL shell.

5. The ultra-high voltage GIL discharge monitoring device according to claim 1, characterized in that: The monitoring module (8) includes a circuit board and an ultrasonic sensor integrated on the circuit board.

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