Portable partial discharge monitoring terminal equipment

Abstract

The utility model relates to the technical field of partial discharge detection, in particular to portable partial discharge monitoring terminal equipment, which comprises an ultrasonic partial discharge detector body and a probe which are connected with each other, and further comprises a guide piece and an installation piece which are connected with each other, and the mounting piece is used for mounting the probe and enabling the probe to face the gap of the switch. According to the utility model, the problem that the probe is easy to wear in the process of detecting the switch cabinet by the ultrasonic partial discharge detector can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of partial discharge detection, and particularly relates to a portable partial discharge monitoring terminal device. Background Art

[0002] Partial discharge refers to the discharge that occurs between electrodes but does not penetrate the electrodes. It is due to the existence of weak electricity inside the equipment insulation or defects caused during the production process, and is a phenomenon of repeated breakdown and extinction under the action of high electric field strength. It is manifested as the breakdown of gas inside the insulation, the local breakdown of solid or liquid media in a small area, or the local breakdown discharge caused by the field strength concentration at the edges and sharp corners of the metal surface, etc. The energy of this kind of discharge is very small, so its short-term existence does not affect the insulation strength of electrical equipment. However, if partial discharges continuously occur in the insulation of electrical equipment under the operating voltage, these weak discharges will produce a cumulative effect, gradually deteriorate the dielectric performance of the insulation and expand local defects, and finally lead to the breakdown of the entire insulation. Classified by the type of discharge, it can be roughly divided into internal discharge of insulating materials, surface discharge, and corona discharge.

[0003] An ultrasonic partial discharge detector is a common portable partial discharge monitoring terminal device. This device can sense the high-frequency signals generated by the faults, vibrations, leaks, and electrical partial discharges of operating equipment. It uses a unique heterodyne method to convert these signals into audio signals, allowing users to hear these sounds through headphones and see the intensity indication on the pointer. The principle of the heterodyne method is like a radio, which can accurately convert signals into sounds, making it easy for people to identify and understand. The advantage of using ultrasonic technology is that it is easy to understand and convenient. Ultrasonic waves are high-frequency short-wave signals that cannot be directly heard by the human ear. When we use an ultrasonic full-function detector, we can fully detect these sounds. The frequency spectrum of the sound waves generated by partial discharges is very wide, ranging from dozens of Hz to several MHz. Among them, signals with a frequency lower than 20 kHz can be heard by the human ear, while ultrasonic signals with a frequency higher than this must be received by an ultrasonic sensor. By measuring the sound pressure of the ultrasonic signal, the intensity of the discharge can be inferred. During the detection of switch cabinets using ultrasonic sensors, the ultrasonic sensors should be scanned along the gaps on the switch cabinets.

[0004] In the related technology, during the detection of switch cabinets using an ultrasonic partial discharge detector, when the ultrasonic sensor probe is scanned close to the gaps of the switch cabinet, the probe is prone to contact friction with the switch cabinet, resulting in wear or scratches on the surface of the probe. These wear or scratches will change the frequency response of the probe, reduce the signal-to-noise ratio of the probe, etc., which will affect the performance of the probe and the accuracy of the detection results. Summary of the Utility Model

[0005] The purpose of the present utility model is to provide a portable partial discharge monitoring terminal device to solve the problem that the probe of an ultrasonic partial discharge detector is prone to wear during the detection of switch cabinets.

[0006] The present utility model is realized through the following technical solutions:

[0007] A portable partial discharge monitoring terminal device includes an ultrasonic partial discharge detector body and a probe connected to each other, and further includes a guiding member and a mounting member connected to each other. One end of the guiding member is used to be inserted into the gap of the switch cabinet, and the mounting member is used to mount the probe and make the probe face the gap of the switch.

[0008] Furthermore, the guiding member includes a guiding piece. One end of the guiding piece is used to be inserted into the gap of the switch cabinet, and the mounting member is arranged on one side of the other end.

[0009] Furthermore, the mounting member includes a mounting cylinder. The interior of the mounting cylinder is hollow, and both ends of the mounting cylinder are open. The guiding piece is connected to the outer wall of the mounting cylinder, and the central axis of the mounting cylinder is located in the plane where the guiding piece is located; the inner hole of the mounting cylinder is used to mount the probe.

[0010] Furthermore, an elastic rubber cylinder is arranged in the inner hole of the mounting cylinder. The interior of the elastic rubber cylinder is hollow, and the elastic rubber cylinder coincides with the central axis of the mounting cylinder. The sensing end of the probe is clamped inside the elastic rubber cylinder, and the other end is located outside the mounting cylinder.

[0011] Furthermore, a soft cushion layer is arranged outside the guiding piece.

[0012] Compared with the prior art, the present utility model has the following advantages and beneficial effects:

[0013] 1. When using an ultrasonic partial discharge detector to detect partial discharge in a switch cabinet, first mount the probe on the mounting member, then insert the guiding member into the gap of the switch cabinet, and then hold the mounting member and move the guiding member along the extension direction of the gap in the switch cabinet. During the process of moving the mounting member and the guiding member, since the probe on the mounting member always faces the gap of the switch cabinet, therefore, the detector can focus more on maintaining the distance between the probe and the switch cabinet, and can reduce the situation that the probe contacts and rubs against the switch cabinet during the process of moving the probe, thereby causing the probe to wear.

[0014] 2. Install the probe in the inner hole of the elastic rubber cylinder inside the installation cylinder. When the guiding piece is located in the gap of the switch cabinet, the installation cylinder can be abutted against the switch cabinet. The probe can be protected through the installation cylinder. During the process of moving the installation cylinder and the guiding piece, due to the contact friction between the installation cylinder and the switch cabinet, at the same time, the probe can always face the gap of the switch cabinet and then detect the switch cabinet, avoiding the situation of contact friction between the probe and the switch cabinet. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings described herein are used to provide a further understanding of the embodiments of the present invention, form a part of this application, and do not limit the embodiments of the present invention.

[0016] In the drawings:

[0017] Figure 1 is a schematic structural diagram of the present invention;

[0018] Figure 2 is a partial structural diagram of the present invention, aiming to show the positional relationship among the installation cylinder, the guiding piece and the probe.

[0019] Marks in the drawings and corresponding component names:

[0020] 1. Ultrasonic partial discharge detector body; 2. Probe; 3. Guiding piece; 4. Installation cylinder; 5. Elastic rubber cylinder. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] To make the purpose, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below in combination with the embodiments and the drawings. The illustrative embodiments of the present invention and their descriptions are only used to explain the present invention and do not limit the present invention. It should be noted that the present invention has been in the actual R & D and use stage.

[0022] Embodiment 1

[0023] A portable partial discharge monitoring terminal device, referring to Figure 1 、 Figure 2 , includes an ultrasonic partial discharge detector body 1 and a probe 2 connected to each other, and also includes a guiding member and a mounting member connected to each other. One end of the guiding member is used to be inserted into the gap of the switch cabinet, and the mounting member is used to mount the probe 2 and make the probe 2 face the gap of the switch.

[0024] In this solution, when using an ultrasonic partial discharge detector to detect partial discharge in a switch cabinet, first install the probe 2 on the mounting part, then insert the guiding part into the gap of the switch cabinet, and then hold the mounting part by hand to move the guiding part along the extending direction of the gap in the switch cabinet. During the process of moving the mounting part and the guiding part, since the probe 2 on the mounting part always faces the gap of the switch cabinet, therefore, the detector can focus more attention on maintaining the distance between the probe 2 and the switch cabinet, and can reduce the situation that the probe 2 contacts and rubs against the switch cabinet during the process of moving the probe 2, which may cause wear of the probe 2. In addition, since the detector only needs to ensure that there is a certain distance between the probe 2 and the switch cabinet, it provides convenience for the detection process to a certain extent.

[0025] Embodiment 2

[0026] Based on Embodiment 1, in this embodiment, referring to Figure 1 、 Figure 2 , the guiding part includes a guiding piece 3. One end of the guiding piece 3 is used to be inserted into the gap of the switch cabinet, and a mounting part is arranged on one side of the other end. The guiding piece 3 can be conveniently inserted into the gap of the switch cabinet, and then move the mounting part and the guiding piece 3, which can make the guiding piece 3 always move along the gap of the switch cabinet. And because the guiding piece 3 is clamped in the gap of the switch cabinet, the postures of the mounting part and the probe 2 on the mounting part can be kept certain, that is, the sensing end of the probe 2 always faces the gap of the switch cabinet, which is convenient for the probe 2 to maintain the state of detecting the switch cabinet.

[0027] Embodiment 3

[0028] Based on Embodiment 2, in this embodiment, referring to Figure 1 、 Figure 2 , the mounting part includes a mounting cylinder 4. The inside of the mounting cylinder 4 is hollow, and both ends of the mounting cylinder 4 are open. The guiding piece 3 is connected to the outer wall of the mounting cylinder 4, and the central axis of the mounting cylinder 4 is located in the plane where the guiding piece 3 is located; the inner hole of the mounting cylinder 4 is used to install the probe 2. Install the probe 2 in the inner hole of the mounting cylinder 4. Specifically, the sensing end of the probe 2 can be located in the middle of the inner hole of the mounting cylinder 4, and the sensing end of the probe 2 can be protected by the mounting cylinder 4 to prevent the probe 2 from contacting the switch cabinet during the process of moving the guiding piece 3 and the mounting cylinder 4.

[0029] Embodiment 4

[0030] Based on Embodiment 3, in this embodiment, referring to Figure 1 、 Figure 2 , an elastic rubber cylinder 5 is arranged in the inner hole of the mounting cylinder 4. The inside of the elastic rubber cylinder 5 is hollow, and the elastic rubber cylinder 5 coincides with the central axis of the mounting cylinder 4. The sensing end of the probe 2 is clamped inside the elastic rubber cylinder 5, and the other end is located outside the mounting cylinder 4.

[0031] In this solution, the probe 2 is installed in the inner hole of the elastic rubber cylinder 5 inside the installation cylinder 4. When the guiding piece 3 is located in the gap of the switch cabinet, the installation cylinder 4 can be abutted against the switch cabinet. The probe 2 can be protected through the installation cylinder 4. During the process of moving the installation cylinder 4 and the guiding piece, there is contact friction between the installation cylinder 4 and the switch cabinet. At the same time, the probe 2 can always face the gap of the switch cabinet to detect the switch cabinet, and the situation of contact friction between the probe 2 and the switch cabinet can be avoided. In addition, the sensing end of the probe 2 is clamped inside the elastic rubber cylinder 5, which can facilitate the quick removal of the probe 2 from the inside of the elastic rubber cylinder 5, and the disassembly and installation of the probe 2 and the installation cylinder 4 can be realized, which is convenient for storing the probe 2 and the installation cylinder 4 separately.

[0032] Furthermore, a soft cushion layer is also arranged outside the guiding piece 3. The soft cushion layer can be made of a wear-resistant rubber layer, and the soft cushion layer can reduce the wear and damage to the paint on the surface of the switch cabinet during the movement of the guiding piece 3 in the gap of the switch cabinet.

[0033] The specific implementation manners described above have further elaborated on the purpose, technical solution and beneficial effects of the present utility model. It should be understood that the above description is only the specific implementation manners of the present utility model and is not used to limit the protection scope of the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. A portable partial discharge monitoring terminal device, comprising a connected ultrasonic partial discharge detector body (1) and a probe (2), characterized in that: It also comprises a guide member and a mounting member which are connected to each other. One end of the guide member is used to be inserted into the gap of the switch cabinet. The mounting member is used to install the probe (2) so that the probe (2) faces the gap of the switch.

2. A portable partial discharge monitoring terminal device according to claim 1, characterized in that: The guide piece comprises a guide plate (3), one end of which is used to be inserted into a gap in the switch cabinet, and one side of the other end is provided with the mounting piece.

3. A portable partial discharge monitoring terminal device according to claim 2, characterized in that: The mounting member comprises a mounting tube (4), the interior of the mounting tube (4) is hollow, both ends of the mounting tube (4) are open, the guide piece (3) is connected to the outer wall of the mounting tube (4), and the central axis of the mounting tube (4) is located on the plane where the guide piece (3) is located; the inner hole of the mounting tube (4) is used for mounting the probe (2).

4. A portable partial discharge monitoring terminal device according to claim 3, characterized in that: An elastic rubber tube (5) is arranged in the inner hole of the installation tube (4); the elastic rubber tube (5) is hollow inside; the elastic rubber tube (5) coincides with the central axis of the installation tube (4); the sensing end of the probe (2) is clamped inside the elastic rubber tube (5) and the other end is located outside the installation tube (4).

5. A portable partial discharge monitoring terminal device according to claim 4, characterized in that: The guide piece (3) is provided with a cushion layer on the outside.

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