Portable partial discharge detection device
By combining multiple detection probes and sensors in a portable partial discharge detection device, the problems of small detection range and poor security are solved, achieving higher detection accuracy and security.
Patent Information
- Application Number
- CN202520262141.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-19
- Publication Date
- 2026-01-13
- Estimated Expiration
- 2035-02-19
AI Technical Summary
Existing portable partial discharge detection devices have a small detection range and a single detection mode, making them prone to missed detections. Furthermore, the close proximity of the person to the detection location poses a safety risk.
A portable partial discharge detection device is designed, which adopts a multi-position detection probe group, including multiple partial discharge detection sensors facing different directions. Combined with the first and second telescopic mechanisms and the rotating motor, the sensors can be extended, tilted and cyclically repositioned, thereby increasing the detection range and improving the detection accuracy.
By combining multiple partial discharge detection sensors, the detection range is expanded, the detection accuracy is improved, the probability of missed detection is reduced, and the security and portability are enhanced.
Smart Images
Figure CN223796635U_ABST
Abstract
Description
Technical Field
[0001] This application belongs to the field of partial discharge detection technology, specifically relating to a portable partial discharge detection device. Background Technology
[0002] Partial discharge refers to the discharge phenomenon occurring in a localized area within an insulator under the influence of an electric field, while the entire insulator remains intact and does not undergo penetrating discharge. Switchgear is a crucial electrical equipment in power plants and substations. Due to the compact arrangement and small spacing of its internal electrical components, partial discharge is prone to occur. Partial discharge is a major cause of insulation degradation and insulation failure in high-voltage switchgear. Although partial discharge generally does not cause penetrating breakdown of the insulator, its long-term presence can reduce the electrical strength of the insulating medium, leading to numerous secondary problems. Therefore, accurate detection of partial discharge in switchgear is necessary.
[0003] Existing portable partial discharge detection devices typically use a fixed partial discharge detection sensor, which has a small detection range and a single detection mode, making it easy to miss detections. Furthermore, the close proximity of the person to the detection location poses a safety risk. Utility Model Content
[0004] This application provides a portable partial discharge detection device to solve or partially solve the problems mentioned in the background art.
[0005] This application provides a portable partial discharge detection device, including a main mounting base, characterized in that: a portable handle is provided at the bottom of the main mounting base, a first telescopic mechanism is vertically provided at its front end face, and a display screen is embedded at its top end face; a multi-position detection probe group is provided at the front end of the telescopic shaft of the first telescopic mechanism, the multi-position detection probe group including multiple detection parts facing different partial discharge detection sensors; a controller is embedded in the main mounting base, and the controller is electrically connected to the display screen, the first telescopic mechanism, and the multi-position detection probe group.
[0006] Preferably, the display screen is a touch screen.
[0007] Preferably, the portable handle has a battery compartment inside, the bottom end of which is hinged with a cover, and a battery pack is installed inside the battery compartment.
[0008] Preferably, a trigger operation button is provided at the connection between the portable grip and the main mounting base, and the trigger operation button is electrically connected to the controller.
[0009] Preferably, the multi-position detection probe group includes a rotary motor connected to the front end of the telescopic shaft of the first telescopic mechanism. A triangular base is provided on the output shaft of the rotary motor. A second telescopic mechanism is respectively provided on the three side end faces of the triangular base. A displacement block is provided at the end of the telescopic shaft of the second telescopic mechanism. A partial discharge detection sensor is embedded on the side end face of the displacement block away from the triangular base.
[0010] Preferably, the cross-section of the triangular base is an equilateral triangle; the three displacement blocks have the same structure and are evenly distributed around the central axis of the triangular base, and the three displacement blocks are inclined relative to the central axis of the triangular base, with the distance between them gradually decreasing from back to front.
[0011] Preferably, the partial discharge detection sensors on the three displacement blocks are an ultrasonic sensor, a UHF sensor, and a ground discharge sensor, respectively.
[0012] Preferably, the side of the ground discharge sensor is covered with an insulating sleeve, and its detection part is located inside the edge opening of the insulating sleeve.
[0013] Preferably, a cooling fan is provided at the front of the triangular base.
[0014] Preferably, a heat dissipation groove is provided on the side of the displacement block near the triangular base, which communicates with the mounting part of the partial discharge detection sensor.
[0015] Compared with the prior art, the beneficial effects of this application are as follows:
[0016] (1) This application improves portability and conforms to human mechanics by using a portable grip and a display screen set on the top of the main mounting base. The first telescopic mechanism facilitates the increase of the distance between the person and the detection part, thereby improving the safety of this application. The multiple partial discharge detection sensors facing different directions improve the detection range of this application, prevent missed detection, and improve detection accuracy.
[0017] (2) This application greatly improves the detection range of this application by setting three displacement blocks with partial discharge detection sensors on the outer periphery of the triangular base in a telescopic and tiltable manner. The three partial discharge detection sensors are an ultrasonic sensor, a UHF ultra-high frequency sensor and a ground electric partial discharge sensor, respectively. They have different detection principles and are rotated by a rotating motor to achieve cyclic switching, which further improves the detection accuracy and reduces the probability of missed detection. Attached Figure Description
[0018] The present application will be further described below with reference to the accompanying drawings and embodiments.
[0019] Figure 1 This is a side view of the overall structure of this application.
[0020] Figure 2 This is a top view of the overall structure of this application.
[0021] Figure 3 This is a schematic diagram of the structure of the multi-position detection probe group in this application.
[0022] In the picture:
[0023] 1. Main mounting base; 2. Portable handle; 3. Display screen; 4. First telescopic mechanism; 5. Rotary motor; 6. Multi-position detection probe group; 7. Cooling fan; 8. Trigger operation button; 61. Triangular base; 62. Displacement block; 63. Ultrasonic sensor; 64. Grounding partial discharge sensor; 65. UHF ultra-high frequency probe; 66. Second telescopic mechanism; 67. Heat dissipation groove; 68. Cooling fan. Detailed Implementation
[0024] If certain terms are used in the specification and claims to refer to specific components, those skilled in the art will understand that hardware manufacturers may use different names to refer to the same component. This specification and claims do not distinguish components based on differences in name, but rather on differences in function. The term "comprising" as used throughout the specification and claims is an open-ended term and should be interpreted as "comprising but not limited to." "Approximately" means that within an acceptable margin of error, those skilled in the art can solve the technical problem and substantially achieve the technical effect within a certain margin of error.
[0025] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "horizontal", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.
[0026] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.
[0027] Example 1
[0028] like Figures 1 to 3As shown, this application provides a portable partial discharge detection device, including a main mounting base 1. A portable handle 2 is provided at the bottom of the main mounting base 1, a first telescopic mechanism 4 is vertically provided at its front end face, and a display screen 3 is embedded at its top end face. A multi-position detection probe group 6 is provided at the front end of the telescopic shaft of the first telescopic mechanism 4. The multi-position detection probe group 6 includes multiple detection parts facing different partial discharge detection sensors. A controller is embedded in the main mounting base 1, and the controller is electrically connected to the display screen 3, the first telescopic mechanism 4, and the multi-position detection probe group 6.
[0029] This application improves portability and conforms to ergonomics by using a portable grip 2 and a display screen 3 located on the top of the main mounting base 1. The first telescopic mechanism 4 facilitates increasing the distance between the user and the detection part, thereby enhancing the safety of this application. The use of multiple partial discharge detection sensors facing different directions increases the detection range of this application, prevents missed detections, and improves detection accuracy.
[0030] Preferably, the display screen 3 is a touch screen for easy user operation.
[0031] Preferably, the portable grip 2 has a battery compartment inside, and a cover is hinged to the bottom end of the battery compartment. The battery compartment contains a battery pack, which powers the controller, display screen 3, first telescopic mechanism 4, and multi-position detection probe group 6.
[0032] Preferably, a trigger operation button 8 is provided at the connection between the portable grip 2 and the main mounting base 1. The trigger operation button 8 is electrically connected to the controller. The trigger operation button 8 is ergonomic and easy to operate.
[0033] Specifically, the multi-position detection probe group 6 includes a rotating motor 5 connected to the front end of the telescopic shaft of the first telescopic mechanism 4. A triangular base 61 is provided on the output shaft of the rotating motor 5. A second telescopic mechanism 66 is vertically mounted on the three side end faces of the triangular base 61. A displacement block 62 is provided at the end of the telescopic shaft of the second telescopic mechanism 66. A partial discharge detection sensor is embedded on the side end face of the displacement block 62 away from the triangular base 61.
[0034] The extension of the second telescopic mechanism 66 can drive the three partial discharge detection sensors to move away from the triangular base 61, further improving the coverage of the partial discharge detection sensors. The rotating motor 5 drives the triangular base 61 to rotate, thereby driving the three partial discharge detection sensors to rotate in a cycle, which helps to avoid the problem of missed detection caused by a single partial discharge detection sensor due to various reasons, and further improves the detection accuracy.
[0035] Furthermore, the cross-section of the triangular base 61 is an equilateral triangle, and the three displacement blocks 62 have the same structure and are evenly distributed around the central axis of the triangular base 61. The three displacement blocks 62 are inclined relative to the central axis of the triangular base 61, and the distance between them gradually decreases from back to front. The partial discharge detection sensor is vertically installed on the end face of the displacement block 62 away from the triangular base 61, and its detection part is located at the far end away from the triangular base 61.
[0036] like Figure 3 As shown, when the three second telescopic mechanisms 66 retract to their initial positions, the three displacement blocks 62 combine to form a triangular pyramid with a cross-sectional dimension that gradually decreases from back to front. The detection parts of the three partial discharge detection sensors are tilted forward relative to the central axis of the triangular base 61, further expanding their detection range.
[0037] Specifically, the partial discharge detection sensors on the three displacement blocks 62 are an ultrasonic sensor 63, a UHF sensor 65, and a ground discharge sensor 64.
[0038] Ultra-high frequency (UHF) sensors detect electromagnetic wave signals generated when partial discharge occurs in GIS equipment. These electromagnetic wave signals are produced by electromagnetic radiation caused by partial discharge, and due to their different frequency bands, they can avoid common electromagnetic interference in daily life, thus having strong anti-interference capabilities. The detection frequency band is relatively high, usually between 300MHz and 3GHz (or 300MHz and 1.5GHz). Electromagnetic wave signals in this frequency range have higher frequencies and shorter wavelengths, which can more accurately reflect the characteristics of partial discharge. Ultrasonic sensors (AE sensors) work by detecting the sound vibration signals generated when partial discharge occurs in GIS equipment. These sound vibration signals are generated by the tiny mechanical vibrations caused by partial discharge, which is helpful for locating partial discharge points. Transient ground voltage (TEV) partial discharge sensors are sensors used to detect partial discharge phenomena inside power equipment. When partial discharge occurs inside power equipment, electromagnetic waves are generated. These electromagnetic waves propagate outwards from the discharge point. Due to discontinuities in the equipment's metal casing (such as gaps, cable insulation terminations, etc.), some electromagnetic waves propagate outside the metal shielding. When the electromagnetic waves reach the outer surface of the metal casing, a brief voltage to ground is generated on the outer surface, i.e., transient ground voltage. By detecting this instantaneous voltage pulse to ground, the ground wave partial discharge sensor can determine whether a partial discharge phenomenon exists inside the equipment and assess the insulation status of the equipment.
[0039] Furthermore, the side of the partial discharge sensor 64 is covered with an insulating sleeve, and its detection part is located inside the opening at the edge of the insulating sleeve to prevent the detection part of the partial discharge sensor 64 from contacting the metal cabinet of the switch cabinet.
[0040] Preferably, a cooling fan 68 is provided at the front of the triangular base 61, and a cooling groove 67 communicating with the partial discharge detection sensor mounting part is provided on the side of the displacement block 62 near the triangular base.
[0041] Since the three partial discharge detection sensors of this application are centrally located, when they are working for a long time, the controller controls the cooling fan 68 to work to enhance the heat dissipation of the partial discharge detection sensors.
[0042] The controller is a microcontroller or other industrial computer equipment, and the first telescopic mechanism 4 and the second telescopic mechanism 66 are miniature electric cylinders.
[0043] Implementation principle:
[0044] The user holds the portable handle 2 and operates the controller via the display screen 3 and trigger operation button 8. The controller controls the first telescopic mechanism 4 to extend or retract to adjust the position of the multi-position detection probe group 6, controls the second telescopic mechanism 66 to extend to drive the displacement of the three partial discharge detection sensors to expand the detection range, and controls the rotation motor 5 to rotate, so that the three detection sensors can be rotated in a cycle to avoid missed detections caused by different detection principles (or other reasons).
[0045] The embodiments of this application have been described in detail above with reference to the accompanying drawings. However, this application is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of this application.
Claims
1. A portable partial discharge detection device, comprising a main mounting base (1), characterized in that: The bottom of the main mounting base (1) is provided with a portable handle (2), the front end face of which is provided with a first telescopic mechanism (4), and the top end face of which is provided with a display screen (3). The front end of the telescopic shaft of the first telescopic mechanism (4) is provided with a multi-position detection probe group (6), which includes multiple detection parts facing different partial discharge detection sensors. The main mounting base (1) is embedded with a controller, which is electrically connected to the display screen (3), the first telescopic mechanism (4), and the multi-position detection probe group (6).
2. The portable partial discharge detection device according to claim 1, characterized in that: The display screen (3) is a touch screen.
3. The portable partial discharge detection device according to claim 1, characterized in that: The portable grip (2) has a battery compartment inside, and a cover is hinged to the bottom end of the battery compartment. A battery pack is installed inside the battery compartment.
4. The portable partial discharge detection device according to claim 1, characterized in that: A trigger operation button (8) is provided at the connection between the portable grip (2) and the main mounting base (1), and the trigger operation button (8) is electrically connected to the controller.
5. The portable partial discharge detection device according to claim 1, characterized in that: The multi-position detection probe group (6) includes a rotating motor (5) connected to the front end of the telescopic shaft of the first telescopic mechanism (4). A triangular base (61) is provided on the output shaft of the rotating motor (5). A second telescopic mechanism (66) is vertically provided on the three side end faces of the triangular base (61). A displacement block (62) is provided at the end of the telescopic shaft of the second telescopic mechanism (66). A partial discharge detection sensor is embedded on the side end face of the displacement block (62) away from the triangular base (61).
6. The portable partial discharge detection device according to claim 5, characterized in that: The cross-section of the triangular base (61) is an equilateral triangle; The three displacement blocks (62) have the same structure and are evenly distributed around the central axis of the triangular base (61). The three displacement blocks (62) are inclined relative to the central axis of the triangular base (61), and the distance between them gradually decreases from back to front. The partial discharge detection sensor is vertically installed on the end face of the displacement block (62) away from the triangular base (61).
7. The portable partial discharge detection device according to claim 5, characterized in that: The partial discharge detection sensors on the three displacement blocks (62) are an ultrasonic sensor (63), a UHF ultra-high frequency sensor (65), and a ground electric partial discharge sensor (64).
8. The portable partial discharge detection device according to claim 7, characterized in that: The side of the ground discharge sensor (64) is covered with an insulating sleeve, and its detection part is located inside the edge opening of the insulating sleeve.
9. The portable partial discharge detection device according to claim 5, characterized in that: A cooling fan (68) is provided at the front of the triangular base (61).
10. The portable partial discharge detection device according to claim 9, characterized in that: The displacement block (62) has a heat dissipation groove (67) on the side near the triangular base that communicates with the partial discharge detection sensor mounting part.