Partial discharge monitoring device

Abstract

The utility model discloses a partial discharge monitoring device, and relates to the technical field of electric power facilities. The device comprises a detector and a guide assembly installed at one end of the detector. The guide assembly comprises a connecting groove, a supporting arm and a guide wheel, the connecting groove is matched with one end of the detector in an inserted mode, one end of the supporting arm is fixedly connected with the connecting groove, and the other end of the supporting arm is rotationally matched with the guide wheel; the rim of the guide wheel is conical, so that the guide wheel can roll along the gap. According to the utility model, the guide assembly is arranged at one end of the detector, the guide assembly comprises the connecting groove, the supporting arm and the guide wheel, the connecting groove can be fixedly inserted into one end of the detector, and the rim of the guide wheel adopts a conical structure, so that the guide wheel can roll along the gap, thereby ensuring that the detector can stably move along the gap of the switch cabinet; interference factors of the detector are reduced, and the stability of capturing signals is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of electric power facilities, and in particular relates to a partial discharge monitoring device. Background Art

[0002] When the field strength generated by the applied voltage in the electrical equipment is sufficient to cause discharge in some areas of the insulation, but no fixed discharge channel is formed in the discharge area, this discharge phenomenon is called partial discharge. Switchgear is an important electrical equipment in power plants and substations. The electrical components inside are compactly arranged and have small spacing, which makes partial discharge prone. Partial discharge is the main cause of insulation degradation and insulation failure in high-voltage switchgear. Although partial discharge generally does not cause through-breakdown of the insulator, if partial discharge exists for a long time, it may cause a decrease in the electrical strength of the insulating medium, which in turn causes many secondary problems. Therefore, it is necessary to accurately detect partial discharge in switchgear.

[0003] At present, in the absence of professional detection tools, operation and maintenance personnel generally judge whether there is discharge in the switch cabinet by sound. However, this method is prone to missed judgment and misjudgment, especially for intermittent discharge. It is difficult for operation and maintenance personnel to find it during the inspection process using this method, and it is very easy to misjudge the normal operation of the switch cabinet, thus laying hidden dangers of accidents.

[0004] In the prior art, when partial discharge occurs inside the switch cabinet, electromagnetic wave signals of different frequencies are radiated. Ultrasonic method and ultra-high frequency (UHF) method can be used to detect partial discharge phenomenon. The specific method is: the detector is usually moved non-contactly along the gap of the switch cabinet to capture the electromagnetic wave signal. However, it is difficult for the handheld detector to well control the distance and direction between the detector and the switch cabinet, resulting in large fluctuations in the captured signal, affecting the accuracy of the detection and prone to misjudgment. Utility Model Content

[0005] The utility model aims to provide a partial discharge monitoring device, by arranging a guide assembly at one end of the detector, the guide assembly comprising a connecting groove, a support arm and a guide wheel, the rim of the guide wheel adopts a conical structure, so that the guide wheel can roll along the gap, thereby ensuring that the detector can move stably along the gap of the switch cabinet, solving the problem in the background technology that the handheld detector is easy to shake, the captured signal fluctuates greatly, the accuracy of the detection is affected, and misjudgment is easy to occur.

[0006] In order to solve the above technical problems, the utility model is realized by the following technical solutions:

[0007] The utility model discloses a partial discharge monitoring device, comprising a detector and a guide assembly installed at one end of the detector; the guide assembly comprises a connecting groove, a supporting arm and a guide wheel; the connecting groove is plug-fitted with one end of the detector, one end of the supporting arm is fixedly connected with the connecting groove, and the other end of the supporting arm is rotationally matched with the guide wheel; the wheel rim of the guide wheel adopts a cone shape, so that the guide wheel can roll along the gap.

[0008] As a preferred technical solution of the utility model, the two side walls of the connecting groove are provided with guide ribs, and the detector has slide grooves on both sides of the end portion plugged into the connecting groove, and the guide ribs are plugged into and matched with the slide grooves.

[0009] As a preferred technical solution of the utility model, a notch is formed on the guide rib, and a protrusion is provided at the tail end of the slide groove, and the protrusion is engaged with the notch.

[0010] As a preferred technical solution of the present utility model, the guide assembly also includes a telescopic rod, the guide wheel is rotatably mounted on one end of the telescopic rod, the end of the support arm away from the connecting groove is fixedly connected with a sleeve, and the circumferential side of the telescopic rod is slidably matched with the sleeve.

[0011] As a preferred technical solution of the utility model, a plurality of adjustment holes are opened on the peripheral side of the telescopic rod along the length direction, a through hole is opened on the bearing of the sleeve, and the sleeve is plugged with the adjustment hole by a latch.

[0012] The utility model has the following beneficial effects:

[0013] 1. The utility model sets a guide assembly at one end of the detector, and the guide assembly includes a connecting groove, a support arm and a guide wheel. The connecting groove can be plugged and fixed with one end of the detector. The rim of the guide wheel adopts a conical structure, so that the guide wheel can roll along the gap, thereby ensuring that the detector can move stably along the gap of the switch cabinet, reducing interference factors of the detector, and improving the stability of capturing signals.

[0014] 2. The utility model provides a telescopic rod so that the distance between the guide wheel and the detector can be adjusted, which is convenient for adjusting the distance between the detector and the switch cabinet to be tested, thereby adapting to different detection scenarios.

[0015] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 It is a structural schematic diagram of a partial discharge monitoring device of the utility model;

[0018] Figure 2 It is an exploded diagram of the partial discharge monitoring device of the utility model;

[0019] Figure 3 A schematic diagram of the structure of the guide component;

[0020] Figure 4 A top view of the guide assembly.

[0021] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0022] 100-detector, 200-guide assembly, 1-connecting groove, 2-support arm, 3-guide wheel, 4-sleeve, 5-telescopic rod, 501-adjusting hole, 6-latch pin, 7-guide rib, 701-notch, 8-slide groove, 801-protrusion. DETAILED DESCRIPTION

[0023] 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 of 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.

[0024] In the description of the present invention, it should be understood that terms such as "end", "upper", "lower", "side", "top", "bottom", "length", "inside", and "surface" indicating orientation or positional relationship are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limitations on the present invention.

[0025] In the prior art, ultrasonic method and ultra-high frequency (UHF) method are usually used to detect partial discharge phenomenon of switch cabinet without opening the switch cabinet. The specific method is: moving the detector around the switch cabinet, especially moving non-contact along the gap of the switch cabinet, can effectively capture electromagnetic wave signals. However, it is difficult for the handheld detector to well control the distance and direction between the detector and the switch cabinet, resulting in large fluctuations in the captured signal, affecting the accuracy of the detection and prone to misjudgment. Based on this, this embodiment provides a partial discharge monitoring device.

[0026] Figure 1 The schematic diagram of the structure of the partial discharge monitoring device provided in this embodiment is as follows: Figure 1 In the embodiment, the partial discharge monitoring device comprises a detector 100 and a guide assembly 200 detachably mounted on one end of the detector 100 .

[0027] Specifically, see Figure 2 and Figure 3 As shown, the guide assembly 200 includes a connection slot 1, a support arm 2 and a guide wheel 3. The connection slot 1 is a slot-shaped structure adapted to the contour of the detection end of the detector 100, and the connection slot 1 can be plugged with the detection end of the detector 100. In order to improve the smoothness and stability of the connection between the connection slot 1 and the detector 100, guide ribs 7 are provided on both side walls of the connection slot 1, and the detector 100 has slide grooves 8 on both sides of the end plugged with the connection slot 1, and the guide ribs 7 are plugged with the slide grooves 8. In addition, a notch 701 is provided on the guide rib 7, and a protrusion 801 is provided at the tail end of the slide groove 8. When the guide rib 7 slides along the slide groove 8 to the tail end, that is, when the connection slot 1 and the detector 100 are plugged in place, the protrusion 801 can be engaged with the notch 701, thereby effectively preventing the connection slot 1 from falling off the detector. In addition, near the detection end face of the detector 100, the connection slot 1 is provided with a clearance hole to avoid affecting the detection accuracy of the sensor of the detector 100.

[0028] One end of the support arm 2 is fixedly connected to the connection slot 1, and the guide wheel 3 is rotatably mounted on the other end of the support arm 2. Figure 4 As shown, the rim of the guide wheel 3 is tapered, so that the guide wheel 3 can roll along the gap, and the tapered structure enables the guide wheel 3 to adapt to gaps of different widths without getting stuck in the gap.

[0029] In a preferred implementation of this embodiment, the guide assembly 200 further includes a telescopic rod 5, the guide wheel 3 is rotatably mounted on one end of the telescopic rod 5, the end of the support arm 2 away from the connection slot 1 is fixedly connected to a sleeve 4, and the telescopic rod 5 can slide along the sleeve 4. The circumference of the telescopic rod 5 is provided with a plurality of adjustment holes 501 along the length direction, the bearing of the sleeve 4 is provided with a through hole, the sleeve 4 and the adjustment hole 501 are plugged in by a latch 6, and by adjusting the telescopic amount of the telescopic rod 5, the distance between the guide wheel 3 and the detector 100 can be adjusted, that is, the detection distance between the detector 100 and the switch cabinet can be adjusted, thereby improving the usability of the device.

[0030] When in use, for detection scenarios that do not require the use of the guide component 200, the detector 100 can be directly held in the hand. When the guide component 200 is needed, such as when monitoring the partial discharge of the switch cabinet, first plug the connection slot 1 with the detection end of the detector 100, and hear a "click" sound, which means it is plugged in place. Next, adjust the telescopic amount of the telescopic rod 5. Subsequently, turn on the detector 100, align the guide wheel 3 with the gap of the switch cabinet, and move slowly along the gap to stably monitor the partial discharge of the switch cabinet. After use, only the reverse steps need to be installed to remove the guide component 200 from the detector 100, which is convenient to use.

[0031] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0032] The preferred embodiments of the utility model disclosed above are only used to help explain the utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the utility model to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that technicians in the relevant technical field can well understand and use the utility model. The utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A partial discharge monitoring device, characterized in that: It comprises a detector (100) and a guide assembly (200) installed at one end of the detector (100); The guide assembly (200) comprises a connecting groove (1), a supporting arm (2) and a guiding wheel (3); the connecting groove (1) is plug-fitted with one end of the detector (100); one end of the supporting arm (2) is fixedly connected to the connecting groove (1); and the other end of the supporting arm (2) is rotatably matched with the guiding wheel (3); The wheel rim of the guide wheel (3) is tapered, so that the guide wheel (3) can roll along the gap.

2. A partial discharge monitoring device according to claim 1, characterized in that: The two side walls of the connecting groove (1) are provided with guide ribs (7), and the detector (100) is provided with slide grooves (8) on both sides of the end portion plugged into the connecting groove (1), and the guide ribs (7) are plugged into and matched with the slide grooves (8).

3. A partial discharge monitoring device according to claim 2, characterized in that: The guide rib (7) is provided with a notch (701), and the tail end of the slide groove (8) is provided with a protrusion (801), and the protrusion (801) is engaged with the notch (701).

4. A partial discharge monitoring device according to claim 1, characterized in that: The guide assembly (200) further comprises a telescopic rod (5), the guide wheel (3) being rotatably mounted on one end of the telescopic rod (5), the end of the support arm (2) away from the connection groove (1) being fixedly connected to a sleeve (4), and the peripheral side of the telescopic rod (5) being slidably matched with the sleeve (4).

5. A partial discharge monitoring device according to claim 4, characterized in that: A plurality of adjustment holes (501) are formed on the circumferential side of the telescopic rod (5) along the length direction, a through hole is formed on the bearing of the sleeve (4), and the sleeve (4) and the adjustment hole (501) are plugged together via a latch (6).

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