CN105277751B - Sensor support device - Google Patents

Abstract

The invention provides a sensor supporting device, comprising: at least one insulating operating handle; an insulating rod end, one end of which is connected to the insulating operating handle; a fixed sensor end, including a cylinder and a bottom surface, and the upper end of the cylinder There is a gap, and the bottom surface is connected with the other end of the end of the insulating rod through a connecting rod; the through-hole screw is fixed together with the outer surface of the cylinder after radially passing through the cylinder; the rotating support Rod, one end of which is sleeved on the through-hole screw, and a plurality of grooves are provided along the length direction of the rotating support rod, and the gap at the upper end of the cylinder enables the rotating support rod to rotate around the through-through screw to be in a horizontal position; the rotation direction fixing screw is connected to the cylinder on the opposite side of the gap, and cooperates with the groove to fix the rotating support rod; the sensor structure bracket is fixed on the rotating support rod The other end of the sensor structure bracket is fixed with a sensor.

Description

Sensor support device

technical field

The invention relates to sensor technology, belongs to the technical field of latent fault diagnosis of high-voltage switchgear, and in particular relates to a sensor supporting device used for live detection of UHF partial discharge of GIS equipment.

Background technique

With the widespread application of gas insulated switchgear (hereinafter referred to as GIS) equipment in the power grid in China, its importance in the power system has become increasingly prominent. GIS failure will pose a huge threat to the safety of the power system and seriously affect the continuity of power supply. And stability, ranging from causing economic losses to causing large-scale power outages, endangering social stability and security, so we must attach great importance to the operation of GIS to minimize the probability of GIS failures. Although the reliability of GIS equipment operation is higher than that of ordinary electrical equipment, there will still be more accidents during operation. In GIS faults, insulation, breaking and closing, external force and other three types of defects account for 80% of the total faults. % or more, the causes of these failures can be divided into three categories: manufacturing, installation and other reasons. Metal particles and powders left in manufacturing may cause GIS failures. Scratches, intruded sundries, moisture, Wrong installation and missing installation may also lead to accidents such as conductor overheating, flashover or even breakdown during operation. Other failure causes include improper design, misoperation and external force damage.

Operating experience shows that partial discharge (hereinafter referred to as PD) will occur in most GIS before electrical faults occur. PD is the discharge generated by the partial breakdown of the insulating medium due to the local electric field concentration in the GIS. There are inevitably various insulation defects inside the GIS. These defects distort the electric field around it. In some parts, the electric field is greatly enhanced, so that it exceeds the breakdown field strength of the insulating medium, which leads to the occurrence of PD and the long-term development of PD. Serious insulation failure may result. On the one hand, PD is a sign of insulation degradation. By carrying out PD live detection on GIS equipment, the insulation status of GIS can be known, so as to provide reference for GIS maintenance and prevent and prevent serious accidents. On the other hand, PD is also a cause of insulation failure. The important reasons of deterioration must be paid attention to, and the detection of PD in GIS has important practical significance to ensure the safe and reliable operation of GIS.

Therefore, the State Grid Corporation of China is based on "Q/GDW 1168-2013 Condition Maintenance Test Regulations for Power Transmission and Transformation Equipment", "Q/GDW 11059-2013 Guidelines for Field Application of Partial Discharge Live Test Technology for Gas-insulated Metal-enclosed Switchgear", "Q/CSQ11401- 2010 Gas Insulated Metal Enclosed Switches (GIS) Partial Discharge UHF Detection Technical Specifications Power Equipment Live Detection Technical Specifications (Trial)-2010, "Guidelines for Substation Equipment Live Detection Work-2014" and other technical specification documents stipulate that for 550kV ( 363kV) and above voltage level GIS equipment conducts UHF partial discharge live detection every six months, and 252kV and below voltage level equipment conducts UHF partial discharge live detection once a year.

In order to ensure safety testing, especially to ensure personal safety and equipment safety, in addition to strictly implementing safety standards and safety regulations related to electric power, the following points are also required to be noted: (1) Do not touch or move other live equipment during testing; (2) ) Prevent the sensor from falling onto the GIS pipeline to avoid accidents; (3) When using the sensor in a small space, try to avoid touching the GIS pipeline with your body; (4) When performing detection, prevent accidental touch and misoperation of other GIS components ; (5) When using the sensor for detection, you should wear insulating gloves to avoid direct contact with the metal parts of the sensor with your hands. However, the current GIS equipment is compact in structure and the detection space is narrow. Some measuring points are more than 3m or even 5m high. During the actual operation, the test personnel will inevitably touch the GIS equipment with their limbs, burying personal and equipment safety hazards.

Contents of the invention

The invention provides a sensor support device to ensure that the UHF partial discharge electrified detection can be performed without touching the GIS equipment for the measuring point whose height is higher than that of the tester himself, so as to ensure the safety of the person and the equipment.

In order to achieve the above object, an embodiment of the present invention provides a sensor support device, the sensor support device includes:

At least one section of insulated operating handle;

The end of the insulating rod, one end is connected with the insulating operating handle;

The fixed end of the sensor includes a cylinder and a bottom surface, and the upper end of the cylinder is provided with a gap, and the bottom surface is connected to the other end of the end of the insulating rod through a connecting rod;

The through-core screw is fixed together with the outer surface of the cylinder after radially passing through the cylinder;

A rotating support rod, one end of which is sleeved on the core-through screw rod, and a plurality of grooves are provided along the length direction of the rotating support rod, and the gap at the upper end of the cylinder enables the rotating support rod to wrap around the core-through screw rod. The screw rotates to a horizontal position;

The rotation direction fixing screw is connected to the cylinder on the opposite side of the gap, and cooperates with the groove to fix the rotation support rod;

The sensor structure bracket is fixed on the other end of the rotating support rod, and the sensor is fixed on the sensor structure bracket.

In one embodiment, the multi-section insulated operating handles are connected by internal threads.

In one embodiment, the end of the insulating rod is connected to the insulating operating handle through an internal thread.

In one embodiment, the sensor structure bracket is fixedly connected to the rotating support rod through a washer and a nut.

In one embodiment, the rotation angle of the rotating support rod around the through-hole screw ranges from 0° to 150°.

In one embodiment, the rotation direction fixing screw is inserted into the cylinder along the horizontal direction.

The beneficial effect of the embodiment of the present invention is that, for the measuring point whose height is higher than that of the tester himself, it can be ensured that the UHF partial discharge live detection can be performed without touching the GIS equipment, so as to ensure the safety of the person and the equipment. It avoids the use of auxiliary test tools such as lift trucks and insulating ladders by testers, saves the time for lifting, lifting and climbing ladders, and greatly improves the efficiency of live detection.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

Fig. 1 is a schematic diagram of a three-dimensional structure of a sensor support device according to an embodiment of the present invention;

Fig. 2 is a view along the direction A of Fig. 1;

Fig. 3 is a view along the B direction of Fig. 1;

Fig. 4 is a view along the direction C of Fig. 1 .

detailed description

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

An embodiment of the present invention provides a sensor support device, which can be used for live detection of UHF partial discharge in GIS equipment. As shown in Figure 1, the sensor support device includes:

At least one section of insulating operating handle 1;

The end 2 of the insulating rod is connected with the insulating operating handle 1 at one end;

The sensor fixing terminal 4 includes a cylinder 41 and a bottom surface 42 , and a notch 43 is formed on the upper end of the cylinder 41 . The bottom surface 42 is connected to the other end of the insulating rod end 2 through a connecting rod 3, which is convenient for disassembly or replacement.

The through-core screw 5 radially passes through the cylinder 41 and is fixed together with the outer surface of the cylinder 41 .

One end of the rotating support rod 6 is sheathed on the through-core screw 5 , and a plurality of grooves 61 are provided along the length direction of the rotating support rod 6 , as shown in FIG. 3 . The gap 43 at the upper end of the cylinder 41 enables the rotating support rod 6 to rotate around the core screw 5 to be in a horizontal position.

The rotation direction fixing screw 7 is connected to the cylinder 41 on the opposite side of the notch 43 , and the rotation direction fixing screw 7 cooperates with the groove to fix the rotation support rod 6 .

The sensor structure support 9 is fixed on the other end of the rotating support rod 6, and a sensor is fixed on the sensor structure support 9.

The rotation angle range of the rotating support rod 6 around the through-core screw rod 5 is 0-150°, which can meet the requirements of measuring points of different sizes and directions. Fig. 1 shows the situation when the rotating support rod 6 is in the horizontal direction, at this moment, the rotating supporting rod 6 just fits into the gap. FIG. 2 is a view along the direction A of FIG. 1 , FIG. 3 is a view along the direction B of FIG. 1 , and FIG. 4 is a view along the direction C of FIG. 1 .

The insulated operating handle 1 can have multiple sections, and the specific number of sections can be determined according to the needs of the detection height. The multi-section insulated operating handles are connected by internal threads to ensure a safe distance.

There are many ways to connect the insulating rod end 2 to the insulating operating handle 1 , for example, the insulating rod end 2 is connected to the insulating operating handle 1 through an internal thread, or the insulating rod end 2 is engaged with the insulating operating handle 1 .

The sensor structure support 9 is fixed together with the rotating support rod 6 so that the sensor structure support 9 moves to the position to be detected under the rotation of the rotation support rod 6 . In order to make the sensor structure support 9 easy to replace and fix firmly, the sensor structure support 9 is fixedly connected to the rotating support rod 6 through a washer and a nut 8 .

The way of cooperating and fixing the rotation direction fixing screw 7 with the groove of the rotation support 6 is shown in Fig. 1 and Fig. 3 . In one embodiment, the rotation direction fixed screw 7 is inserted into the cylinder 41 along the horizontal direction.

The sensor structure support 9 is designed according to the size and shape of the fixed sensor, so as to stabilize the connection between the sensor structure support and the sensor.

In the present invention, specific examples have been applied to explain the principles and implementation methods of the present invention, and the descriptions of the above examples are only used to help understand the method of the present invention and its core idea; meanwhile, for those of ordinary skill in the art, according to this The idea of the invention will have changes in the specific implementation and scope of application. To sum up, the contents of this specification should not be construed as limiting the present invention.

Claims (6)

1. a kind of sensor support device, it is characterised in that including：

At least one section insulation operation handle；

Insulating bar termination, one end is connected with the insulation operation handle, and the insulating bar termination passes through internal thread and the insulation Operation handle is connected；

Sensor fixes termination, including cylinder and bottom surface, and the cylinder upper end is provided with a gap, and the underrun one connects Extension bar is connected with the other end of the insulating bar termination；

Core through screw rod, is fixed together radially across after the cylinder with the lateral surface of the cylinder；

Rotation support bar, one end is set on the core through screw rod, and the length direction of the rotation support bar is provided with multiple Groove, the gap of the cylinder upper end enables that the rotation support bar is turned in horizontal position around the core through screw rod Put, the rotation support bar is 0-150 ° around the core through screw rod rotational angle range；

Direction of rotation standing screw, is connected on the cylinder of the offside of the gap, with the groove fit to fix State rotation support bar；

Sensor construction support, is fixed on the other end of the rotation support bar, and biography is fixed with the sensor construction support Sensor.

2. sensor support device according to claim 1, it is characterised in that between more piece insulation operation handle in Threaded connection.

3. sensor support device according to claim 1, it is characterised in that the sensor construction support passes through pad And nut is fixedly connected with the rotation support bar.

4. sensor support device according to claim 1, it is characterised in that the direction of rotation standing screw is along level Insert the cylinder in direction.

5. sensor support device according to claim 1, it is characterised in that the length of the insulation operation handle is 1 Rice.

6. sensor support device according to claim 1, it is characterised in that a diameter of the 5 of the insulation operation handle Centimetre.