Three-way adapter for calibrating ultra-high frequency partial discharge online monitoring device and its use method

Abstract

The present invention provides a three-way adapter for calibrating an ultra-high frequency partial discharge online monitoring device and a method for using the same, belonging to the technical field of on-site calibration of an ultra-high frequency partial discharge online monitoring device, comprising connector one, connector two and connector three, connector one being connected to an ultra-high frequency partial discharge sensor, connector two being connected to a background of an online monitoring device, connector three being connected to a calibration standard signal source, and connector two and connector three being connected at different times. The present invention utilizes a three-way adapter design to reserve a signal channel specifically for calibrating an ultra-high frequency partial discharge online monitoring device, ensuring that the ultra-high frequency partial discharge online monitoring device can complete on-site calibration without removing a sensor test line connector, greatly improving the efficiency of on-site rapid calibration of the ultra-high frequency partial discharge online monitoring device, and ensuring that the ultra-high frequency partial discharge online monitoring device is not damaged due to frequent disassembly and assembly of the connector, resulting in the sensor test line connector being damaged.

Description

Technical Field

[0001] The present invention relates to the technical field of on-site calibration of an ultra-high frequency partial discharge online monitoring device, and in particular to a three-way adapter for calibrating an ultra-high frequency partial discharge online monitoring device and a use method thereof. Background Art

[0002] Ultra-high frequency (UHF) partial discharge (PD) online monitoring technology is highly effective in detecting defects within combined electrical equipment, such as discharges caused by foreign objects, poor conductor connections, and discharges caused by cracks or bubbles in the insulation. It plays a crucial role in providing early warning of defects in operating combined electrical equipment. Consequently, a large number of these devices are installed in my country. However, due to the long-term electromagnetic environment, such as the high electric and magnetic fields of energized equipment, these devices can experience aging or degradation of the electronic components within the online monitoring system, leading to poor measurement accuracy and inaccurate assessment of the operating status of power equipment. This can lead to significant potential hazards not being promptly identified, necessitating regular on-site calibration of these devices. Furthermore, to ensure accurate monitoring of these numerous UHF PD online monitoring devices, regular on-site calibration is essential. The current calibration method requires manual disconnection of the test lead connectors connecting the UHF sensors and connection to a standard calibration device for calibration. This method can easily damage the sensor test lead connectors due to frequent disconnection and assembly, disrupting the proper functioning of the UHF PD devices and hindering efficient on-site calibration. Therefore, it is necessary to design a three-way adapter for calibrating the UHF PD online monitoring device to ensure that the UHF PD online monitoring device can complete the on-site calibration work without removing the sensor test line connector.

[0003] Patent document CN105911500A discloses a device and method for assessing and verifying a UHF partial discharge online monitoring system. The device comprises a control host, a verification signal source, a synchronization unit, a 50Ω coaxial cable signal line, and a signal transmitting antenna. The signal output end of the control host is connected to the signal input end of the verification signal source, the signal output end of the synchronization unit is connected to the signal input end of the verification signal source, and the verification signal source is connected to the signal transmitting antenna. The device can assess the detection sensitivity, linearity, stability, pulse count, diagnostic identification, etc. of the online monitoring system, but requires disconnecting the test line and connecting to the verification device. Summary of the Invention

[0004] In view of the deficiencies in the prior art, the present invention provides a three-way adapter for calibrating an ultra-high frequency partial discharge online monitoring device and a method for using the same.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0006] A three-way adapter for calibrating an ultra-high frequency partial discharge online monitoring device comprises a first connector, a second connector and a third connector. The first connector is connected to an ultra-high frequency partial discharge sensor, the second connector is connected to a backend of the online monitoring device, and the third connector is connected to a calibration standard signal source. The second and third connectors are not connected at the same time.

[0007] Furthermore, a converter head outer shielding layer is provided on the three-way adapter, and the converter head outer shielding layer is made of a magnetic conductive material for shielding external electromagnetic fields.

[0008] Furthermore, both the second connector and the third connector are provided with openings, and dial-type switching contacts are fixed at the openings. The dial-type switching contacts include an insulating control disk and metal contacts arranged at both ends of the insulating control disk.

[0009] Furthermore, the insulating control disk is circular, and the two metal contacts and the center of the insulating control disk are not on the same straight line.

[0010] Furthermore, a through hole is provided in the middle portion of the insulating control disk, a rotating shaft is provided in the through hole, and the rotating shaft is connected to the insulating control disk via a bearing.

[0011] Furthermore, the second connector extends vertically downward below the first connector, and the third connector includes a horizontal portion vertically connected to the first connector and a vertical portion vertically connected to the horizontal portion and extending downward, and the vertical portion is parallel to the second connector.

[0012] Furthermore, the rotating shaft is connected below the horizontal portion.

[0013] Furthermore, the method of using the three-way adapter for calibrating the ultra-high frequency partial discharge online monitoring device is as follows: during normal monitoring, the second connector is connected to the background of the online monitoring device, and the third connector is disconnected from the calibration standard signal source; during calibration, the connection between the second connector and the background of the online monitoring device is disconnected, and the third connector is connected to the calibration standard signal source.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] The present invention utilizes a three-way adapter design to reserve a signal channel specifically for the calibration of the UHF partial discharge online monitoring device, ensuring that the UHF partial discharge online monitoring device can complete on-site calibration work without removing the sensor test line connector. This can greatly improve the efficiency of on-site rapid calibration of the UHF partial discharge online monitoring device, and ensure that the UHF partial discharge online monitoring device will not be damaged due to frequent disassembly and assembly of the connector, thereby improving the safety of on-site calibration work of the UHF partial discharge online monitoring device and having great promotion value. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be described in further detail below with reference to the accompanying drawings.

[0017] Figure 1 This is a structural diagram of a three-way adapter according to Example 1 of the present invention.

[0018] Figure 2 This is a top view of the three-way adapter according to Example 1 of the present invention.

[0019] Figure 3 This is a structural schematic diagram of the connection between the insulating control disk and the rotating shaft in Example 2 of the present invention.

[0020] The meanings of the reference numerals are as follows:

[0021] 1: UHF partial discharge sensor, 2: Signal measurement line, 3: Signal measurement line outer shield, 4: T-connector, 5: Converter outer shield, 6: Connector 2, 7: Connector 3, 8: Rotating shaft, 9: Insulated control panel, 10: Metal contact, 11: Dial-type conversion contact. DETAILED DESCRIPTION

[0022] The following will be combined with the Figure 1-3 The present invention is clearly and completely described in detail with specific embodiments. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0023] Example 1

[0024] like Figure 1-2 As shown, this embodiment provides a three-way adapter 4 for calibrating an ultra-high frequency partial discharge online monitoring device, including connector one, connector two 6 and connector three 7. The connector one is connected to the ultra-high frequency partial discharge sensor 1 through a signal test line 2. The outside of the signal test line 2 is provided with a signal test line outer shielding layer. The connector two 6 is connected to the backend of the online monitoring device. The connector three 7 is connected to the calibration standard signal source. The connector two 6 and the connector three 7 are not connected at the same time. If one connector connection is in a normally closed state during operation, the other connector connection must be ensured to be in a normally open state. The connector two 6 is connected to the backend of the online monitoring device and is connected during normal operation. It needs to be disconnected during on-site calibration. The connector three 7 is connected to the calibration standard signal source and is not connected at normal times. It needs to be connected to the calibration standard signal source during on-site calibration.

[0025] The three-way adapter 4 is provided with a converter outer shielding layer 5 , which is made of a magnetic conductive material and is used to shield external electromagnetic fields.

[0026] Both connector 2 6 and connector 3 7 have openings, each of which houses a dial-type switching contact 11. The dial-type switching contact 11 comprises an insulating control disk 9 and metal contacts 10 disposed at both ends of the insulating control disk 9. When personnel need to conduct on-site calibration of the UHF partial discharge online monitoring device, they manually shift the dial-type switching contact 11, causing the metal contacts 10 in the two signal channels to shift, thereby simultaneously connecting and disconnecting the two signal channels.

[0027] The insulating control disk 9 is circular. Since the voltage is very low, plastic can be used for insulation. The two metal contacts 10 are not on the same straight line as the center of the insulating control disk 9. They cannot be symmetrically inlaid with the center of the insulating control disk 9 as the symmetry point. Instead, they should be deflected at a certain appropriate angle to ensure that the hand-activated dial-type conversion contact 11 can realize the conduction of one signal channel while disconnecting the other signal channel.

[0028] Example 2

[0029] like Figure 3 As shown, this embodiment provides a three-way adapter for calibrating an ultra-high frequency partial discharge online monitoring device, which is an optimization based on Example 1:

[0030] A through hole is provided in the middle of the insulating control disk 9 , a rotating shaft 8 is provided in the through hole, and the rotating shaft 8 is connected to the insulating control disk 9 via a bearing.

[0031] The second connector 6 extends vertically downward below the first connector, and the third connector 7 includes a horizontal portion vertically connected to the first connector and a vertical portion vertically connected to the horizontal portion and extending downward, and the vertical portion is parallel to the second connector 6.

[0032] The rotating shaft 8 is connected below the horizontal portion.

[0033] The method of using the three-way adapter for calibrating an ultra-high frequency partial discharge online monitoring device is as follows: during normal monitoring, the second connector is connected to the backend of the online monitoring device, and the third connector is disconnected from the calibration standard signal source; during calibration, the second connector and the backend of the online monitoring device are disconnected, and the third connector is connected to the calibration standard signal source.

[0034] In the description of the present invention, it should be understood that relational terms such as "one" and "two" are used only to separate one entity or operation from another entity or operation, and do not necessarily require or imply the existence of any actual relationship or order between these entities or operations. The terms "upper," "lower," "left," "right," "vertical," "horizontal," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended only to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be understood as limiting the present invention.

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention and are not limiting. Other modifications or equivalent substitutions made to the technical solution of the present invention by ordinary technicians in this field should be included in the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solution of the present invention.

Claims

1. A three-way adapter for calibrating an ultra-high frequency partial discharge online monitoring device, characterized in that: It includes connector one, connector two and connector three, connector one is connected to the ultra-high frequency partial discharge sensor, connector two is connected to the background of the online monitoring device, connector three is connected to the calibration standard signal source, and connector two and connector three are not connected at the same time; connector two and connector three are both provided with openings, and dial-type conversion contacts are fixed at the openings, and the dial-type conversion contacts include an insulating control disk and metal contacts arranged at both ends of the insulating control disk; the insulating control disk is circular, and the two metal contacts and the center of the insulating control disk are not on the same straight line; a through hole is provided in the middle of the insulating control disk, and a rotating shaft is provided in the through hole, and the rotating shaft and the insulating control disk are connected by a bearing.

2. A three-way adapter for calibrating an ultra-high frequency partial discharge online monitoring device according to claim 1, characterized in that: The three-way adapter is provided with a converter head outer shielding layer, which is made of magnetic conductive material and is used to shield external electromagnetic fields.

3. The three-way adapter for calibrating an ultra-high frequency partial discharge online monitoring device according to claim 2, characterized in that: The second connector extends vertically downward below the first connector, and the third connector includes a horizontal portion vertically connected to the first connector and a vertical portion vertically connected to the horizontal portion and extending downward, wherein the vertical portion is parallel to the second connector.

4. A three-way adapter for calibrating an ultra-high frequency partial discharge online monitoring device according to claim 3, characterized in that: The rotating shaft is connected below the horizontal portion.

5. A method for using a three-way adapter for calibrating an ultra-high frequency partial discharge online monitoring device according to any one of claims 1 to 4, characterized in that: During normal monitoring, the second connector is connected to the backend of the online monitoring device, and the third connector is disconnected from the calibration standard signal source; during calibration, the second connector and the backend of the online monitoring device are disconnected, and the third connector is connected to the calibration standard signal source.

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