CN203812345U - Transformer anti-theft detection device - Google Patents

Abstract

The utility model relates to an anti-theft detection device, specifically to a transformer anti-theft detection device, and belongs to the technical field of power transmission equipment. The transformer anti-theft detection device includes an upper cover and a bottom shell. A cavity is disposed in the bottom shell. A long conductive shaft and a short conductive shaft are disposed in the cavity. The side of the bottom shell is connected to a waterproof connector via a thread. An end, in the bottom shell, of the short conductive shaft is connected to a strain beam via a rivet, and the strain beam is connected via a rivet to a fixed block fixed to the inner side wall of the bottom shell. A strain gage is disposed on the strain beam, and a pin of the strain gage is connected to a pin of the waterproof connector via a third conductor. The waterproof connector is electrically connected to an alarm controller. The transformer anti-theft detection device is high in reliability, suitable for all kinds of transformers, good in anti-electromagnetic interference performance, free from region or climate influence, and good in waterproof performance.

Description

Transformer anti-theft detection device

technical field

The utility model 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. the

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. the

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. the

Contents of the invention

The purpose of this utility model 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 is waterproof With good performance, it can be widely used in anti-theft detection of various transformers. the

According to the technical solution provided by the utility model, 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. Install the conductive long shaft and the conductive short shaft, and the side of the bottom case is threaded to connect the waterproof connector; one end of the conductive short shaft is located in the bottom case, and the other end passes through one side of the bottom case, and a short shaft is provided at the connection between the conductive short shaft and the bottom case Insulating 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 passed through the rivet Connect and fix the fixed block on the inner wall of the bottom case; 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. the

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. the

Further, the strain beam is made of insulating material. the

Further, the two ends of the conductive long axis located outside the bottom shell are provided with long axis connection holes, and the long axis connection holes (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. the

Compared with the prior art, the utility model has the following advantages:

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

Description of drawings

Fig. 1 is a perspective view of the utility model. the

Fig. 2 is the rear view of the utility model. the

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

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

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. the

Detailed ways

Below the utility model will be further described in conjunction with the embodiment in the accompanying drawing:

As shown in Figures 1 and 2, the utility model mainly includes an upper cover 1 and a bottom shell 2. There is a cavity in the bottom shell 2, and a conductive long shaft 3 and a conductive short shaft 4 are installed in the cavity, and the side of the bottom shell 2 is threaded. Connect the waterproof connector 8. 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. the

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 . the

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. the

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 . the

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

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

The working principle of the utility model is: the utility model is mainly used for the anti-theft detection of the transformer, and the device of the utility model should be fixed reliably when in use, and the two conductive metal wires are connected to the transformer, the conductive long axis and the conductive short axis, and gold is realized. Electrically connected, the strain beam deforms due to the tension of the wire. The device of the utility model is connected with an alarm controller through a waterproof connector, and an electric signal is applied to any conductive shaft (conductive short shaft or conductive long shaft), and an electric signal is detected on another 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. the

Claims (5)

1. A transformer anti-theft detection device, including an upper cover (1) and a bottom case (2), the upper cover (1) and the bottom case (2) are connected into one body by a plurality of screws at the four corners, and the characteristics are: the bottom case ( 2) There is a cavity inside, and the conductive long shaft (3) and the conductive short shaft (4) are installed in the cavity, and the side of the bottom case (2) is connected to the waterproof connector (8) through threads; one end of the conductive short shaft (4) is located on the Inside the bottom case (2), the other end passes through one side of the bottom case (2), and a short shaft insulating sheath (5) is provided at the junction of the conductive short shaft (4) and the bottom case (2); the short shaft insulating sheath (5) The bottom shell (2) is connected by threads, and the short shaft insulating sheath (5) and the conductive short shaft (4) are smoothly fitted; the end of the conductive short shaft (4) located in the bottom shell (2) passes through Rivets are used to connect the strain beam (6), and the strain beam (6) is connected and fixed to the fixed block (7) on the inner wall of the bottom case (2) through rivets; strain gauges are arranged on the strain beam (6), and the pins of the strain gauges pass through the The three wires are connected to the pins of the waterproof connector (8); the conductive short shaft (4) is provided with a short shaft threaded hole (13), and the short shaft threaded hole (13) is connected to the first wire, and the other end of the first wire is connected to the first wire. The pin connection of the waterproof connector (8); the two ends of the conductive long shaft (3) respectively pass through the two sides of the bottom case (2), and the connection between the conductive long shaft (3) and the bottom case (2) is provided with long shaft insulation The sheath (9); 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; the conductive long shaft (3) A long-axis threaded hole (14) is provided on the top, and the second wire is connected in the long-axis threaded hole (14), and the other end of the second wire is connected to the pin of the waterproof connector (8); the waterproof connector (8) and The alarm controller is electrically connected. 2. The transformer anti-theft detection device according to claim 1, characterized in that: the upper end of the bottom case (2) is provided with a positioning boss (11), and the upper cover (1) faces the positioning boss of the bottom case (2). A positioning groove (12) is provided at the platform (11), the positioning boss (11) is clamped in the positioning groove (12), and a sealing rubber strip (10) is provided in the positioning groove (12). 3. The transformer anti-theft detection device according to claim 1, characterized in that: the strain beam (6) is made of insulating material. 4. The transformer anti-theft detection device according to claim 1, characterized in that: the two ends of the conductive long axis (3) located outside the bottom case (2) are provided with long axis connecting holes (16), and the long axis connecting holes (16) Used to connect the conductive wire fixed on the transformer. 5. The transformer anti-theft detection device according to claim 1, characterized in that: one end of the conductive short shaft (4) located outside the bottom case (2) is provided with a short shaft connection hole (15), and the short shaft connection hole ( 15) Used to connect the conductive wire fixed on the transformer.