CN103956009B - Transformer anti-theft sniffer - Google Patents

Abstract

The invention relates to an anti-theft detection device, in particular to an anti-theft detection device for a transformer, which belongs to the technical field of electric power transmission equipment. It includes an upper cover and a bottom case. There is a cavity in the bottom case, and a conductive long shaft and a conductive short shaft are installed in the cavity. The side of the bottom case is connected with a waterproof connector through threads; The strain beam is connected, and the strain beam is connected to the fixed block fixed on the inner wall of the bottom shell through rivets; the strain gauge is provided on the strain beam, and the pins of the strain gauge are connected with the pins of the waterproof connector through the third wire. The waterproof connector is electrically connected with the alarm controller. The invention has high reliability, is suitable for various transformers, has good anti-strong electromagnetic interference performance, is not affected by regions and climates, and has good waterproof performance.

Description

Transformer anti-theft detection device

technical field

The invention relates to an anti-theft detection device, in particular to an anti-theft detection device for a transformer, which belongs to the technical field of power transmission equipment.

Background technique

As an important equipment for power transmission, transformers play a pivotal role in the power grid. Many transformers are installed in remote places, and there are few special personnel to guard and inspect them. These transformers are at risk of being stolen. In order to prevent transformers from being stolen, the following methods are generally used for anti-theft:

1. Three-phase four-wire power failure alarm. Generally, thieves will cut off the wires of the transformer by cutting the wires when stealing the transformer, and when the three-phase wire is broken or the power is cut off, the anti-theft device will send out an alarm. This type of anti-theft device has a direct electrical connection with the power line, and an alarm will be issued as long as the power fails. False alarms occur when a planned outage occurs.

2. Sanjian infrared early warning. The method is to use dual-element infrared and microwave to detect and warn at the same time. When someone tries to approach the transformer, the infrared beam will detect someone breaking in, and the anti-theft device will trigger an alarm. This method is suitable for perimeter protection, and cannot detect whether the transformer is stolen. Factors such as climate change, animal intrusion, and fallen leaves may cause false alarms in the system.

3. Vibration alarm. When someone tries to hit or pry the parts of the transformer with a shovel or a hammer, the alarm will be alarmed through vibration detection. Other vibration sources such as large vehicles passing by and aircraft flying at low altitude may cause false alarms of the system.

Contents of the invention

The purpose of the present invention is to overcome the above disadvantages, thereby providing a transformer anti-theft detection device with simple structure and high reliability, which can effectively detect whether the transformer is stolen, has good anti-strong electromagnetic interference performance, is not affected by regions and climates, and has waterproof performance. Well, it can be widely used in anti-theft detection of various transformers.

According to the technical solution provided by the present invention, the transformer anti-theft detection device includes an upper cover and a bottom case, and the upper cover and the bottom case are connected into one body through a plurality of screws at the four corners. Conductive long shaft and conductive short shaft, the side of the bottom shell is connected to the waterproof connector through threads; one end of the conductive short shaft is located in the bottom shell, and the other end passes through one side of the bottom shell, and the connection between the conductive short shaft and the bottom shell is provided with short shaft insulation Sheath; the short shaft insulating sheath is connected to the bottom shell through threads, and the short shaft insulating sheath and the conductive short shaft are smoothly fitted; one end of the conductive short shaft in the bottom shell is connected to the strain beam through a rivet, and the strain beam is connected through a rivet The fixed block fixed on the inner wall of the bottom shell; the strain gauge is provided on the strain beam, and the pins of the strain gauge are connected with the pins of the waterproof connector through the third wire; Connect the first wire in the threaded hole, and the other end of the first wire is connected to the pin of the waterproof connector; the two ends of the conductive long axis pass through the two sides of the bottom case respectively, and the connection between the conductive long shaft and the bottom case is provided with a long shaft insulation protection sleeve; the long-axis insulating sheath is connected to the bottom shell through threads, and there is a smooth fit between the long-axis insulating sheath and the conductive long shaft; the long-axis threaded hole is provided on the long-axis threaded hole, and the second wire is connected to the long-axis threaded hole. The other ends of the two wires are connected to the pins of the waterproof connector; the waterproof connector is electrically connected to the alarm controller.

Further, a positioning boss is provided on the upper surface of the bottom case, and a positioning groove is provided on the upper cover facing the positioning boss of the bottom case. The positioning boss is clamped in the positioning groove, and a sealing rubber strip is provided in the positioning groove.

Further, the strain beam is made of insulating material.

Further, the two ends of the conductive long axis located outside the bottom shell are provided with long-axis connection holes, which are used to connect the conductive wires fixed on the transformer.

Further, one end of the conductive short shaft outside the bottom shell is provided with a short shaft connecting hole, and the short shaft connecting hole is used for connecting the conductive wire fixed on the transformer.

Compared with the prior art, the present invention has the following advantages:

The invention has simple, compact, reasonable structure and high reliability, and is suitable for all kinds of transformers; the conductive metal wire is used to connect the transformer, and when the conductive metal wire is disconnected or cut off, the alarm controller triggers an alarm; the strain beam monitors the conductive metal The change of the wire tension, when the conductive wire tension has a sudden change, the alarm is triggered; the anti-strong electromagnetic interference performance is good, it is not affected by the region and climate, and the waterproof performance is good.

Description of drawings

Fig. 1 is a perspective view of the present invention.

Fig. 2 is the rear view of the present invention.

Fig. 3 is a sectional view of A-A in Fig. 2 .

Fig. 4 is a B-B sectional view in Fig. 2 .

Explanation of reference signs: 1-upper cover, 2-bottom shell, 3-conductive long shaft, 4-conductive short shaft, 5-short shaft insulating sheath, 6-strain beam, 7-fixing block, 8-waterproof connector , 9-Long shaft insulating sheath, 10-Sealing strip, 11-Positioning boss, 12-Positioning groove, 13-Short shaft threaded hole, 14-Long shaft threaded hole, 15-Short shaft connecting hole, 16- Long axis connection hole.

detailed description

Below the present invention will be further described in conjunction with the embodiment in the accompanying drawing:

As shown in Figures 1-2, the present invention mainly includes an upper cover 1 and a bottom case 2, and a cavity is provided in the bottom case 2, and a conductive long shaft 3 and a conductive short shaft 4 are installed in the cavity, and the sides of the bottom case 2 are connected by threads Waterproof connector8. The upper cover 1 and the bottom case 2 are connected into one body by a plurality of screws at the four corners.

As shown in Figures 1 and 3, the upper end surface of the bottom shell 2 is provided with a positioning boss 11, and the upper cover 1 is provided with a positioning groove 12 facing the positioning boss 11 of the bottom shell 2, and the positioning boss 11 is clamped in the positioning In the groove 12, a sealing rubber strip 10 is arranged in the positioning groove 12, and the sealing rubber strip 10 plays a waterproof role.

As shown in FIG. 3 , one end of the conductive short shaft 4 is located in the bottom case 2 , and the other end passes through one side of the bottom case 2 . A short shaft insulating sheath 5 is provided at the connection between the conductive short shaft 4 and the bottom case 2 . The short-axis insulating sheath 5 is connected to the bottom shell 2 through threads, and the short-axis insulating sheath 5 and the conductive short shaft 4 are smoothly fitted. Short shaft insulation sheath 5 plays the role of insulation and waterproof. One end of the conductive short shaft 4 inside the bottom case 2 is connected to the strain beam 6 through a rivet, and the strain beam 6 is connected to a fixing block 7 fixed on the inner side wall of the bottom case 2 through a rivet. The strain beam 6 is made of insulating material. The strain gauge 6 is provided with a strain gauge for measuring the deformation of the strain beam 6 . The pins of the strain gauge are connected with the pins of the waterproof connector 8 through the third wire. The conductive short shaft 4 is provided with a short shaft threaded hole 13 , the short shaft threaded hole 13 is connected with a first wire, and the other end of the first wire is connected with the pin of the waterproof connector 8 .

One end of the conductive short shaft 4 located outside the bottom case 2 is provided with a short shaft connecting hole 15, which is used for connecting a conductive wire fixed on the transformer.

As shown in FIG. 4 , both ends of the conductive long axis 3 respectively pass through two sides of the bottom case 2 , and a long-axis insulating sheath 9 is provided at the connection between the conductive long shaft 3 and the bottom case 2 . The long-axis insulating sheath 9 is connected to the bottom shell 2 through threads, and the long-axis insulating sheath 9 and the conductive long shaft 3 are smoothly fitted. Long axis insulating sheath 9 plays the effect of insulation and waterproof. The conductive long shaft 3 is provided with a long shaft threaded hole 14 , the second wire is connected in the long shaft threaded hole 14 , and the other end of the second wire is connected with the pin of the waterproof connector 8 .

Two ends of the conductive long shaft 3 located outside the bottom case 2 are provided with long shaft connecting holes 16, and the long shaft connecting holes 16 are used for connecting conductive wires fixed on the transformer.

The waterproof connector 8 is electrically connected with the alarm controller. The alarm controller selects the backbone node of distribution transformer comprehensive test model DWE100-BE111 from Zhejiang Weisi Wireless Network Technology Co., Ltd. The conductive long axis, the conductive short axis and the strain gauges of the strain beam are all connected to the pins of the waterproof connector through wires, and the conductive long axis, the conductive short axis and the strain gauges of the strain beam and the alarm controller are electrically connected through the waterproof connector. The conductive short axis or the conductive long axis is connected to the output end of the signal generation circuit of the alarm controller, the other conductive shaft is connected to the input end of the signal detection circuit of the alarm controller, and the strain gauge of the strain beam is connected to the deformation measurement circuit of the alarm controller .

The working principle of the present invention is: the present invention is mainly used for the anti-theft detection of transformers. When in use, the device of the present invention must be fixed reliably, and two conductive metal wires are connected to the transformer, the conductive long axis and the conductive short axis, and the gold realizes the electrical connection. The strain beam deforms due to the tension of the wire. The device of the present invention is connected with an alarm controller through a waterproof connector, an electric signal is applied to any conductive shaft (conductive short shaft or conductive long shaft), and an electric signal is detected on the other conductive shaft. When the conductive wire connecting the transformer is disconnected or not connected, the alarm controller triggers an alarm because no electrical signal is detected. In addition, the change of wire tension can be determined by measuring the deformation value of the strain beam in real time. When there is a sudden change in the wire tension, the deformation value will also change suddenly, and the alarm controller triggers an alarm at this time.

Claims (5)

1. a transformer anti-theft sniffer, comprise upper cover (1) and drain pan (2), upper cover (1) and drain pan (2) are linked into an integrated entity by multiple screws of corner, it is characterized in that: drain pan is provided with cavity in (2), install conduction major axis (3) and conduction minor axis (4) in cavity, drain pan (2) side is threaded connection water-proof connector (8); Conduction minor axis (4) one end is positioned at drain pan (2), and the other end is through a side of drain pan (2), and conduction minor axis (4) and drain pan (2) junction are provided with minor axis insulating sheath (5); Minor axis insulating sheath (5) is threaded connection drain pan (2), is smooth cooperation between minor axis insulating sheath (5) and conduction minor axis (4); One end being positioned at drain pan (2) of conduction minor axis (4) is by rivet interlacement strain beam (6), and strain beam (6) is fixed on the fixed block (7) of drain pan (2) madial wall by rivet interlacement; Strain beam (6) is provided with foil gauge and answers, and the pin of foil gauge is connected by the pin of privates with water-proof connector (8); Conduction minor axis (4) is provided with minor axis threaded hole (13), and connect the first wire in minor axis threaded hole (13), the first wire other end is connected with the pin of water-proof connector (8); Conduction major axis (3) two ends are each passed through drain pan (2) two sides, and conduction major axis (3) and drain pan (2) junction are provided with major axis insulating sheath (9); Major axis insulating sheath (9) is threaded connection drain pan (2), is smooth cooperation between major axis insulating sheath (9) and conduction major axis (3); Conduction major axis (3) is provided with major axis threaded hole (14), and connect the second wire in major axis threaded hole (14), the second wire other end is connected with the pin of water-proof connector (8); Described water-proof connector (8) is electrically connected with alarm controller.

2. transformer anti-theft sniffer as claimed in claim 1, it is characterized in that: described drain pan (2) upper surface is provided with positioning boss (11), upper cover (1) is provided with detent (12) towards positioning boss (11) place of drain pan (2), positioning boss (11) is installed in detent (12), is provided with sealing joint strip (10) in detent (12).

3. transformer anti-theft sniffer as claimed in claim 1, is characterized in that: described strain beam (6) adopts insulating material to make.

4. transformer anti-theft sniffer as claimed in claim 1, it is characterized in that: the two ends that described conduction major axis (3) is positioned at drain pan (2) outside are provided with major axis connecting hole (16), and major axis connecting hole (16) is for being connected and fixed conductive wire on the transformer.

5. transformer anti-theft sniffer as claimed in claim 1, it is characterized in that: one end that described conduction minor axis (4) is positioned at drain pan (2) outside is provided with minor axis connecting hole (15), and minor axis connecting hole (15) is for being connected and fixed conductive wire on the transformer.