Ultrasonic-based partial discharge detection device

Abstract

The utility model discloses a partial discharge detection device based on ultrasonic waves, which relates to the field of discharge detection, and comprises an acoustic imager, a positioning plate arranged below the acoustic imager, a pair of supporting arms arranged below the positioning plate, and a pair of limiting plates arranged above the positioning plate and capable of clamping the acoustic imager, and the top ends of the pair of limiting plates are connected with stopping plates through rotating shafts. According to the utility model, the limiting plate and the stopping plate are arranged; through the combined arrangement of the stop notch and the positioning block, the acoustic imager can be quickly clamped and positioned, and the time needed in the process of clamping and positioning the acoustic imager is shortened. Meanwhile, pressure springs and pressing blocks which are distributed front and back can improve the tightness of connection between the limiting rod and the limiting arm, if the unmanned aerial vehicle deflects and shakes to a large extent, the limiting rod can be prevented from deviating, and the stability of the limiting arm, the stopping plate and the acoustic imager on the inner side of the stopping plate in the flight detection process is guaranteed.

Description

Technical Field

[0001] The utility model relates to the field of discharge detection, in particular to a partial discharge detection device based on ultrasonic waves. Background Art

[0002] Acoustic imaging is based on microphone array measurement technology. It determines the position of the sound source based on the phased array principle by measuring the signal phase difference of sound waves reaching each microphone in a certain space, measures the amplitude of the sound source, and displays the distribution of the sound source in space in the form of an image, that is, obtaining a spatial sound field distribution cloud map - an acoustic image, in which the color and brightness of the image represent the strength of the sound.

[0003] The existing method of using ultrasound to implement partial discharge detection mostly installs the acoustic imager with the drone. As the drone flies, it can implement continuous discharge detection operations on the power equipment. Before the discharge detection, it is necessary to complete the docking installation operation of the acoustic imager and the drone through a bracket or a hanger of specified specifications. During the installation of the bracket and the hanger, in order to ensure the tightness of the connection, most of them use screws to install, which takes a long time to install. After the flight detection work is completed, if the acoustic imager needs to be disassembled, it is relatively time-consuming. Utility Model Content

[0004] In order to solve the above problems, the present application provides a partial discharge detection device based on ultrasound.

[0005] To achieve the above objectives, the present application provides the following technical solutions: an ultrasonic-based partial discharge detection device, comprising an acoustic imager, a positioning plate is disposed below the acoustic imager, and a pair of support arms are disposed below the positioning plate.

[0006] It also includes a pair of limit plates arranged above the positioning plate and capable of clamping the acoustic imager, the top ends of the pair of limit plates are connected to stop plates via rotating shafts, the surfaces of the stop plates are provided with stop notches for accommodating the acoustic imager to pass through, and positioning blocks that can fit the surface of the acoustic imager are fixedly connected to the front and rear positions of the inner sides of the stop notches.

[0007] The surface of the stop plate is connected to the limit arm through a rotating shaft, the surface of the limit plate is provided with a channel for accommodating the limit arm to pass through, the front and rear sides of the bottom end of the limit arm are provided with a slidable limit rod, and the front and rear surfaces of the bottom end of the limit arm are provided with a through hole for accommodating the limit rod to pass through.

[0008] Furthermore, a pair of alignment sleeves are fixedly connected to the bottom of the positioning plate, and the pair of alignment sleeves are installed on the surface of the support arm by screws. The ends of the pair of support arms extend upward to the front of the positioning plate to form an arc-shaped curved arm body, and the top of the support arm is fixedly connected to an alignment plate that can be connected to the drone carrier.

[0009] Furthermore, the bottom of the limiting rod is fixedly connected with a support rod, the support rod is against the surface of the positioning plate, an extension rod is penetrated by the support rod, the extension rod is L-shaped, and the shorter leg of the extension rod is threadedly installed on the surface of the positioning plate.

[0010] Furthermore, a positioning ring is threadedly connected to the surface of the extension rod, and a pressure block is connected to the surface of the positioning ring via a pressure spring. The pressure spring and the pressure block are both sleeved on the outside of the extension rod. In a natural state, the pressure block abuts against the surface of the support rod.

[0011] Furthermore, the positioning plate is a hollow structure, and the microphone array of the acoustic imager faces the inner side of the hollow structure of the positioning plate.

[0012] Furthermore, the ends of the extension rods are threadedly connected with interception rings, and when the limiting rods are inserted into the inner side of the through hole opened at the bottom end of the limiting arm, the support rods abut against the interception rings.

[0013] In summary, the technical effects and advantages of the utility model are:

[0014] The utility model can quickly clamp and position the acoustic imager through the combination of the limit plate, the stop plate, the stop notch and the positioning block, thereby reducing the time required for clamping and positioning the acoustic imager. At the same time, the pressure springs and the pressure blocks distributed at the front and rear can improve the tightness of the connection between the limit rod and the limit arm. If the drone has a large degree of deflection and shaking, the limit rod can be prevented from offsetting, thereby ensuring the stability of the limit arm, the stop plate and the acoustic imager inside thereof during the flight detection process, and improving the accuracy of the ultrasonic detection process. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0016] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model.

[0017] Figure 2This is a schematic diagram of the structure of the utility model from a second viewing angle.

[0018] Figure 3 This is a front view structural schematic diagram of the utility model.

[0019] Figure 4 This is a third perspective structural diagram of the utility model

[0020] Figure 5 For this utility model Figure 4 A schematic diagram of the enlarged structure of part A.

[0021] In the figure: 1. acoustic imager; 2. support arm; 21. positioning plate; 22. alignment sleeve; 23. alignment plate; 3. limit plate; 4. stop plate; 41. stop notch; 42. positioning block; 5. limit arm; 6. limit rod; 61. support rod; 7. extension rod; 8. positioning ring; 9. pressure spring; 10. pressure block; 11. interception ring. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] Example 1: Reference Figure 1 , Figure 2 and Figure 3 The ultrasonic-based partial discharge detection device shown comprises an acoustic imager 1 , a positioning plate 21 is arranged below the acoustic imager 1 , and a pair of support arms 2 are arranged below the positioning plate 21 .

[0024] The acoustic imager 1 uses microphone array beamforming technology to obtain sound source distribution data, and cooperates with a high-definition camera to collect video images in real time. By fusing the sound source distribution data with the video image, the changing sound source is dynamically presented on the display device, and potential partial discharge fault points can be quickly checked. The acoustic imager 1 is a device in the prior art that implements partial discharge detection operations based on ultrasound, and no further description is given here.

[0025] It also includes a pair of limit plates 3 disposed above the positioning plate 21 and capable of clamping the acoustic imager 1. During the installation of the acoustic imager, the acoustic imager 1 can be placed inside the pair of limit plates 3. The top ends of the pair of limit plates 3 are connected to a stop plate 4 via a rotating shaft. The surface of the stop plate 4 is provided with a stop notch 41 for accommodating the acoustic imager 1 to pass through. Positioning blocks 42 that can fit the surface of the acoustic imager 1 are fixedly connected to the front and rear positions of the inner side of the stop notch 41.

[0026] The surfaces of the stopper plates 4 are connected to the limit arms 5 through the rotating shafts, the surface of the limiter plates 3 is provided with a passage for accommodating the limiter arms 5 to pass through, the front and rear sides of the bottom ends of the limiter arms 5 are provided with slidable limiter rods 6, and the front and rear surfaces of the bottom ends of the limiter arms 5 are provided with through holes for accommodating the limiter rods 6 to pass through. When the limiter rods 6 are connected to the limiter arms 5, the stopper plates 4 can be in a stable state, and the stopper plates 4 press the acoustic imager 1.

[0027] The combination of the limit plate 3, the stop plate 4, the stop notch 41 and the positioning block 42 can quickly clamp and position the acoustic imager 1, reduce the time required for clamping and positioning the acoustic imager 1, improve the position stability of the acoustic imager 1, and effectively prevent the acoustic imager 1 from shaking or deflecting during the flight of the drone.

[0028] like Figure 2 As shown, a pair of alignment sleeves 22 are fixedly connected to the bottom of the positioning plate 21, and the pair of alignment sleeves 22 are both installed on the surface of the support arm 2 by screws. The ends of the pair of support arms 2 are both extended upward to the front of the positioning plate 21 to form an arc-shaped curved arm body, and the top of the support arm 2 is fixedly connected to an alignment plate 23 that can be connected to the drone carrier. In the process of the acoustic imager 1 carrying out flight detection with the drone, the support arm 2 has a buffering effect on the airflow in front of the acoustic imager 1, which can reduce the impact of the airflow during the flight.

[0029] The bottom of the limit rod 6 is fixedly connected with a support rod 61, and the support rod 61 is against the surface of the positioning plate 21. An extension rod 7 is provided through the support rod 61. The extension rod 7 is an L-shaped structure, and the shorter leg of the extension rod 7 is threadedly installed on the surface of the positioning plate 21. If the acoustic imager 1 needs to be disassembled, the limit rods 6 distributed in the front and rear are close to each other, and the limit rods 6 can be manually and synchronously moved to move in the front and rear directions respectively. At this time, the support rod 61 slides on the surface of the extension rod 7 until the limit rod 6 is separated from the through holes opened on the front and rear surfaces of the bottom end of the limit arm 5, and the transfer stop plate 4 and the limit arm 5 can be smoothly rotated to transfer the acoustic imager 1. Through the above method, the installation and disassembly steps of the acoustic imager 1 are simplified, and it has the advantage of portable operation.

[0030] Example 2: Figure 4 , Figure 5 As shown, the surface of the extension rod 7 is threadedly connected with a positioning ring 8, and the surface of the positioning ring 8 is connected with a pressure block 10 via a pressure spring 9. The pressure spring 9 and the pressure block 10 are both sleeved on the outside of the extension rod 7. In the natural state, the pressure block 10 abuts against the surface of the support rod 61.

[0031] When the acoustic imager 1 flies with the drone and performs partial discharge detection operations, the pressure springs 9 distributed at the front and rear can drive the pressure block 10 to press against the surface of the support rod 61, thereby improving the tightness of the connection between the limit rod 6 and the limit arm 5. If the drone produces a large degree of deflection and shaking, the limit rod 6 can be prevented from being offset or slipping, thereby ensuring the stability of the limit arm 5, the stop plate 4 and the acoustic imager 1 inside it during the flight detection process, and improving the accuracy of the ultrasonic detection process.

[0032] like Figure 2 As shown, the positioning plate 21 is a hollow structure, and the microphone array of the acoustic imager 1 is facing the inner side of the hollow structure of the positioning plate 21, which can ensure that the microphone array of the acoustic imager 1 can smoothly obtain the sound source distribution data, and combine the video images collected in real time by the high-definition camera to dynamically present the changing sound source on the terminal display.

[0033] like Figure 5 As shown, the ends of the extension rod 7 are threadedly connected with an interception ring 11, and when the limit rod 6 is inserted into the inner side of the through hole opened at the bottom end of the limit arm 5, the support rod 61 abuts against the interception ring 11. The interception ring 11 can effectively prevent the limit rod 6 from being separated from the extension rod 7, has a limiting effect on the limit rod 6, and ensures the stability of the limit rod 6 during the adjustment process.

[0034] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A partial discharge detection device based on ultrasonic waves, comprising an acoustic imager (1), characterized in that: A positioning plate (21) is arranged below the acoustic imager (1), and a pair of support arms (2) are arranged below the positioning plate (21); It also includes a pair of limit plates (3) arranged above the positioning plate (21) and capable of clamping the acoustic imager (1); the top ends of the pair of limit plates (3) are connected to a stop plate (4) via a rotating shaft; the surface of the stop plate (4) is provided with a stop notch (41) for accommodating the acoustic imager (1) to pass through; and positioning blocks (42) capable of being attached to the surface of the acoustic imager (1) are fixedly connected at the front and rear positions of the inner sides of the stop notch (41); The surface of the stop plate (4) is connected to the limit arm (5) via a rotating shaft, the surface of the limit plate (3) is provided with a channel for accommodating the limit arm (5) to pass through, the front and rear sides of the bottom end of the limit arm (5) are provided with slidable limit rods (6), and the front and rear surfaces of the bottom end of the limit arm (5) are provided with through holes for accommodating the limit rod (6) to pass through.

2. The ultrasonic-based partial discharge detection device according to claim 1, characterized in that: A pair of alignment sleeves (22) are fixedly connected to the bottom of the positioning plate (21), and the pair of alignment sleeves (22) are installed on the surface of the support arm (2) by screws. The ends of the pair of support arms (2) extend upward to the front of the positioning plate (21) to form an arc-shaped curved arm body, and the top of the support arm (2) is fixedly connected to an alignment plate (23) that can be connected to the drone carrier.

3. The ultrasonic-based partial discharge detection device according to claim 1, characterized in that: The bottom of the limiting rod (6) is fixedly connected to a support rod (61), the support rod (61) is against the surface of the positioning plate (21), and an extension rod (7) is provided through the support rod (61), the extension rod (7) is in an L-shaped structure, and the shorter support leg of the extension rod (7) is threadedly mounted on the surface of the positioning plate (21).

4. The ultrasonic-based partial discharge detection device according to claim 3, characterized in that: The surface of the extension rod (7) is threadedly connected to a positioning ring (8), and the surface of the positioning ring (8) is connected to a pressure block (10) via a pressure spring (9). The pressure spring (9) and the pressure block (10) are both sleeved on the outside of the extension rod (7). In a natural state, the pressure block (10) abuts against the surface of the support rod (61).

5. The ultrasonic-based partial discharge detection device according to claim 1, characterized in that: The positioning plate (21) is a hollow structure, and the microphone array of the acoustic imager (1) faces the inner side of the hollow structure of the positioning plate (21).

6. The ultrasonic-based partial discharge detection device according to claim 3, characterized in that: The ends of the extension rods (7) are threadedly connected with interception rings (11), and when the limiting rod (6) is inserted into the inner side of the through hole opened at the bottom end of the limiting arm (5), the support rod (61) abuts against the interception ring (11).

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