Safety alarm device used in cooperation with transformer

Abstract

A safety alarm device matched with a transformer for use belongs to the technical field of transformer auxiliary equipment, and comprises a pyroelectric sensor, a motor reducing mechanism, a generator, an impeller blade, a shell, a detection circuit, a receiving circuit, an alarm circuit and a rotary power supply mechanism, the pyroelectric sensor, the motor reducing mechanism, the generator, the impeller blade, the shell, the detection circuit, the receiving circuit, the alarm circuit and the rotary power supply mechanism are installed together. Under the combined action of related mechanisms and under the condition that wind exists in the field, the pyroelectric sensor can be driven to rotate by 360 degrees through wind power and an impeller blade or a motor speed reduction mechanism, so that the pyroelectric detection module detects whether a bird approaches or not, the bird can be repelled by an alarm sound at the first time when the bird is detected to approach, and the safety of the bird is improved. Due to the rotary power supply mechanism, a larger detection range is realized, and the probability of power supply faults of the transformer caused by birds and the like is reduced as much as possible. In conclusion, the device has a good application prospect.

Description

Technical Field

[0001] This utility model relates to the field of transformer auxiliary equipment technology, and in particular to a safety alarm device used in conjunction with a transformer. Background Technology

[0002] A transformer is a device that uses the principle of electromagnetic induction to change alternating current voltage. Its main components include a primary coil, a secondary coil, and an iron core (or magnetic core). Through these components, the transformer can perform functions such as voltage transformation and current transformation. When a transformer is installed outdoors, there is a chance that birds and other insects will approach it. To prevent birds from resting on the transformer and causing electric shocks or short circuits, some transformers have alarms based on pyroelectric sensors installed on their sides to scare away approaching birds with an alarm sound.

[0003] While existing safety alarm devices for transformers have achieved some degree of bird deterrence, their structural limitations also present several technical drawbacks. Specifically, the pyroelectric sensors in these alarm devices have fixed probes, meaning they can only detect birds approaching from one side. This relatively small detection range hinders effective detection (for example, birds entering from the left, right, or rear sides of the sensor probe cannot be detected), leaving potential safety hazards. Therefore, it is essential to provide a transformer safety alarm device capable of omnidirectional bird detection. Utility Model Content

[0004] To overcome the shortcomings of existing safety alarm devices used in transformer installations, which are limited by their structure and have the drawbacks described in the background art, this utility model provides a safety alarm device for transformers that, under the combined action of relevant mechanisms, can drive a pyroelectric sensor to rotate 360 ​​degrees through wind power (this mode can save energy when there is wind on site) or a motor reduction mechanism to detect the approach of birds, etc. The device can also trigger an alarm sound to drive away birds as soon as they are detected, thereby achieving a larger detection range and minimizing the probability of power supply failures caused by birds.

[0005] The technical solution adopted by this utility model to solve its technical problem is:

[0006] A safety alarm device for use with a transformer includes a pyroelectric sensor, a motor reduction mechanism, a generator, impeller blades, and a housing. It also includes a detection circuit, a receiving circuit, an alarm circuit, and a rotating power supply mechanism. Multiple impeller blades are mounted on a shaft with their inner sides spaced apart. The rear end of the pyroelectric sensor housing is fixedly mounted on the front side of the middle section of the shaft. The lower end of the shaft is fixedly mounted to the upper end of the generator shaft. The lower end of the generator housing is fixedly mounted to the upper end of the housing. The detection circuit is installed inside the housing. The upper end of the power output shaft of the motor reduction mechanism is fixedly mounted to the lower outer end of the housing. The lower end of the motor reduction mechanism is fixedly mounted to the side of the transformer. The rotating power supply mechanism includes an inner sleeve, a metal slip ring, and metal contact plates. The tube is fixed to the lower part of the shaft and located at the upper end of the generator shaft. The inner sides of the two metal slip rings are fixedly installed at a distance from each other on the outer ends of the tube. A support base is fixedly installed at one end of the housing of the motor reduction mechanism. The upper and lower ends of the two contact plates are fixedly installed at a distance from each other on the upper end of the support base. The power output terminal of the generator is electrically connected to the signal input terminal of the detection circuit. The power output terminal of the detection circuit is electrically connected to the power input terminal of the pyroelectric sensor. The signal output terminal of the pyroelectric sensor is connected to the inner sides of the two slip rings via wires. The receiving circuit and the alarm circuit are installed in the component box. The signal input terminal of the alarm circuit is connected to the inner sides of the two slip rings via wires. The power output terminal of the receiving circuit is electrically connected to the power input terminal of the motor reduction mechanism.

[0007] Furthermore, the inner sides of the two contact pieces and the outer ends of the two slip rings are in sliding electrical contact, and the contact pieces and slip rings are made of copper.

[0008] Furthermore, the detection circuit includes a bridge rectifier, a diode, a capacitor, a transistor, a relay, a wireless transmission circuit module, and a battery that are electrically connected. The positive power output terminal of the bridge rectifier is connected to the positive terminal of the capacitor, the positive terminal of the diode, and one end of the resistor. The negative terminal of the diode is connected to the positive terminal of the battery, the positive power input terminal of the relay, and the control power input terminal. The other end of the resistor is connected to the base of the transistor. The collector of the transistor is connected to the negative power input terminal of the relay. The negative terminal of the capacitor is connected to the negative terminal of the battery, the emitter of the transistor, and the negative power input terminal of the wireless transmission circuit module. The positive power input terminal of the wireless transmission circuit module is connected to the normally open contact terminal of the relay.

[0009] Furthermore, the two contacts under one of the transmit buttons of the wireless transmission circuit module are connected together.

[0010] Furthermore, the receiving circuit includes a wireless receiving circuit module and a relay that are electrically connected. The positive power input terminal of the wireless receiving circuit module is connected to the control power input terminal of the relay, the power output terminal of the wireless receiving circuit module is connected to the positive power input terminal of the relay, and the negative power input terminal of the wireless receiving circuit module is connected to the negative power input terminal of the relay.

[0011] Furthermore, the alarm circuit includes resistors, transistors, relays, and an alarm connected via circuit board wiring. The positive power input terminal of the relay is connected to the control power input terminal. One end of the first resistor and one end of the second resistor are connected to the base of the transistor. The other end of the second resistor is connected to the emitter of the transistor and the negative power input terminal of the alarm. The normally open contact of the relay is connected to the positive power input terminal of the alarm.

[0012] Compared with existing technologies, the advantages of this invention are as follows: Under the combined action of relevant mechanisms, in the presence of wind, the pyroelectric sensor can be driven to rotate 360 ​​degrees by wind power (this mode saves energy) and by the impeller or motor reduction mechanism. This allows the pyroelectric detection module to detect the approach of birds, and to immediately sound an alarm to scare them away. Due to the rotating power supply mechanism, a wider detection range is achieved, minimizing the probability of transformer power supply failures caused by birds. In summary, this invention has good application prospects. Attached Figure Description

[0013] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0014] Figure 1 This is a schematic diagram of the overall structure and a partially enlarged part of the structure of this utility model.

[0015] Figure 2 This is a partially enlarged structural schematic diagram of this utility model.

[0016] Figure 3 This is the circuit diagram of this utility model. Detailed Implementation

[0017] Figure 1 , 2As shown in Figure 3, a safety alarm device for use with a transformer includes a pyroelectric sensor A3, a motor reduction mechanism M1, a small alternator M, a power module A1, and impeller blades 1. It also includes a detection circuit 2, a receiving circuit 3, an alarm circuit 4, and a rotating power supply mechanism. There are five impeller blades 1, with their inner sides welded at intervals onto a shaft 101. The rear end of the housing of the pyroelectric sensor A3 is fixedly mounted on the front end of the middle section of the shaft 101. The lower end of the shaft 101 is vertically distributed and welded to the upper end of the shaft of the generator M. The lower end of the housing of the generator M is fixedly mounted on the upper end of a circular outer shell 5. The detection circuit 2 is mounted on a circuit board inside the outer shell 5. The motor reduction mechanism M1... The upper end of the force output shaft and the middle of the lower outer end of the outer casing 5 are welded together. The lower end of the motor reduction mechanism M1 is fixedly installed on the side end of the transformer 6. The rotating power supply mechanism includes an inner sleeve 71, metal slip rings X, and contact pieces T. The plastic insulating inner sleeve 71 is tightly fitted on the lower part of the shaft 101 and located on the upper end of the rotating shaft of the generator M. The inner sides of the two metal slip rings X are tightly fitted on the outer ends of the sleeve 71 at intervals. A support base 72 is fixedly installed on the upper right end of the casing of the motor reduction mechanism M1. The right sides of the two contact pieces T are insulatedly installed on the upper end of the support base 72 at intervals. The receiving circuit 3 and the alarm circuit 4 are installed on the circuit board inside the component box 8. The component box 8 is installed inside the electrical control box of the transformer.

[0018] Figure 1 , 2As shown in Figure 3, the inner left sides of the two contact pieces T and the outer sides of the two metal slip rings X are in sliding electrical contact. The contact pieces T and slip rings X are made of copper. The detection circuit includes a bridge rectifier A1, diode VD, capacitor C1, transistor Q1, relay J1, wireless transmission circuit module A2, and battery G1 connected via circuit board wiring. The positive power output terminal 3 of bridge rectifier A1 is connected to the positive terminal of capacitor C1, the positive terminal of diode VD, and one end of resistor R1. The negative terminal of diode VD is connected to the positive terminal of battery G1, the positive power input terminal of relay J1, and the control power input terminal. The other end of resistor R1 is connected to the base of transistor Q1. The collector of transistor Q1 is connected to the negative power input terminal of relay J1. The negative terminal of capacitor C1 is connected to the negative terminal of battery G1, the emitter of transistor Q1, and the negative power input terminal 2 of wireless transmission circuit module A2. The positive power input terminal 1 of wireless transmission circuit module A2 is connected to the normally open contact of relay J1. The two contacts under the first transmit button D1 of the wireless transmitting circuit module are connected together. The receiving circuit includes a wireless receiving circuit module A5 and a relay J2 connected via circuit board wiring. The positive power input terminal 1 of the wireless receiving circuit module A5 is connected to the control power input terminal of the relay J3. The power output terminal 3 of the wireless receiving circuit module A5 is connected to the positive power input terminal of the relay J2. The negative power input terminal 2 of the wireless receiving circuit module A5 is connected to the negative power input terminal of the relay J2. The alarm circuit includes resistors R2 and R3, transistor Q2, relay J3, and alarm BX connected via circuit board wiring. The positive power input terminal and control power input terminal of relay J3 are connected. One end of the first resistor R2 and one end of the second resistor R3 are connected to the base of transistor Q2. The other end of the second resistor R3 is connected to the emitter of transistor Q2 and the negative power input terminal of alarm BX. The normally open contact of relay J3 is connected to the positive power input terminal of alarm BX.

[0019] Figure 1 , 2As shown in Figure 3, the power output terminal of generator M and the signal input terminal of the detection circuit, pins 1 and 2 of bridge rectifier A1, are connected by wires. The negative terminal of diode VD and the emitter of transistor Q1 at the power output terminal of the detection circuit are connected by wires to the power input terminals 1 and 2 of pyroelectric sensor A3. The signal output terminal 3 of pyroelectric sensor A3, the negative power output terminal of detection circuit, the emitter of transistor Q1, and the inner sides of the two slip rings X are connected by wires. The power input terminals 1 and 2 of power module A4 are connected to the two poles of AC 220V power supply by wires. The power output terminals 3 and 4 of power module A4 are connected to the power input terminals 1 and 2 of wireless receiver circuit module A5, the control power input terminal of relay J3, and the emitter of transistor Q2 by wires. The normally closed contact terminal of relay J2 and the negative power input terminal of relay J2 at the power output terminal of receiver circuit are connected to the power input terminal of motor reduction mechanism M1 by wires. The two contact pieces T on the right side, the other end of the signal input resistor R2 of the alarm circuit, and the emitter of the transistor Q2 are connected by wires. Figure 3 In the diagram, power module W1 is a finished AC 220V to DC 6V power module; transistors Q1 and Q2 are 9013 (NPN); diode VD is 1N4007; relays J1, J2, and J3 are DC 6V; resistors R1, R2, and R3 have resistances of 47K, 10K, and 7K respectively; battery G1 is a 6V / 10Ah lithium battery; bridge rectifier A1 is KBP301; wireless transmitter module A2 and wireless receiver module A5 are TX315B1 wireless transmitter and receiver modules. The components are finished products; capacitor C1 is a 470μF / 25V electrolytic capacitor; the buzzer BX is an MF6V active continuous audible alarm; the pyroelectric sensor A3 is an HC-SR501 pyroelectric detection sensor with two power input terminals and one signal output terminal. When its probe detects an active organism, the signal output terminal will output a high level, and vice versa; the motor reduction mechanism M1 is a 10W coaxial motor gear reducer; the generator M is a 9V small wind turbine.

[0020] Figure 1 , 2As shown in Figure 3, after the 220V AC power enters the power input terminal of the power module A4, the power module A4 outputs a stable 6V DC power from pins 3 and 4, which enters the power input terminals of the receiving circuit and the alarm circuit. When there is wind at the site, the wind will blow the impeller 1, causing the shaft 101 to rotate. Then, the shaft 101 drives the shaft of the generator M to rotate, and the generator M generates electrical energy which enters the power input terminal of the bridge rectifier A1. The approximately 9V DC power output from pins 3 and 4 of the bridge rectifier A1 is filtered by capacitor C1 and enters the other end of resistor R1. It then passes through diode VD and is unidirectionally conducted into battery G1 to charge battery G1 (so that the detection circuit can be powered and other circuits can operate normally, and battery G1 is pre-charged with power; due to the voltage drop of diode VD, the power voltage entering battery G1 is about 8.2V, so it can effectively ensure the charging needs of battery G1). In reality, when there is no wind and the impeller blade 1 does not drive the pyroelectric detection module A3 to rotate, the base of transistor Q1 has no power input, and the relay J1 is de-energized, with its control power input terminal and normally open contact terminal open. Therefore, the wireless transmission circuit module A2 will not transmit wireless signals, and the motor reduction mechanism M1 will be energized (6V power will enter the power input terminal of the motor reduction mechanism M1 through the control power input terminal and normally closed contact terminal of relay J2). The power output shaft of the motor reduction mechanism M1 drives the pyroelectric detection module A3 to rotate continuously in a 360-degree manner. When there is wind and the impeller blade 1 drives the pyroelectric detection module A3 to rotate, the power output from pin 3 of the bridge rectifier A1 is stepped down and current-limited by resistor R1 and enters the base of transistor Q1 (above 0.7V). Transistor Q1 conducts, and the collector outputs a low level, which enters the negative power input terminal of relay J1. Relay J1 is energized and closes, controlling the power input terminal and the normally open contact terminal to close. Consequently, the wireless transmission circuit module A2 will transmit the first wireless closing signal (the two contacts under the first button of the wireless transmission circuit module A2 are connected together). Due to the unidirectional conduction of diode VD, the power output from battery G1 will not enter the other end of resistor R1.

[0021] Figure 1 , 2As shown in Figure 3, when there is wind, the wireless transmitting circuit module A2 transmits the first wireless signal. After the wireless receiving circuit module A5 receives the signal, pin 3 of the wireless receiving circuit module A5 outputs a high level, which enters the positive power input terminal of the relay J2. The relay J2 is energized and its control power input terminal and normally closed contact terminal are opened. In this way, the motor reduction mechanism M1 will not be energized and will not work. Through the above, when there is wind, the pyroelectric sensor can be driven to rotate 360 ​​degrees by the wind (this mode saves energy) through the impeller to detect whether birds are approaching. When there is no wind, the pyroelectric sensor is driven to rotate 360 ​​degrees by the motor reduction mechanism M1 to detect whether birds are approaching. While saving energy, it also ensures that the pyroelectric sensor can always rotate 360 ​​degrees and be in detection mode. When the pyroelectric sensor is working and no birds are approaching, pin 3 of the pyroelectric sensor A3 does not output a high level (the voltage signal output from pin 3 of the pyroelectric detection module A3, along with the negative power input, passes through two rotating slip rings X and two stationary contact pieces T to the other end of resistor R2 and the emitter of transistor Q2). Thus, the buzzer BX will not be energized and will not emit a sound. Within a range of approximately 10 meters, when a bird approaches, pin 3 of the pyroelectric sensor A3 outputs a high level. This high level is divided by resistors R2 and R3 and enters the base of transistor Q2. Transistor Q2 then conducts, and its collector outputs a low level, which enters the positive power input of the buzzer BX. The buzzer BX is then energized and emits a loud sound to scare away the approaching bird, effectively preventing the possibility of bird-related power supply failures to the transformer.

[0022] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model.

[0023] Furthermore, it should be understood that although this specification describes the embodiments, the embodiments do not necessarily contain only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in the embodiments can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A safety alarm device for use with a transformer, comprising a pyroelectric sensor, a motor reduction mechanism, a generator, impeller blades, and a housing, characterized in that, It also includes a detection circuit, a receiving circuit, an alarm circuit, and a rotating power supply mechanism; the impeller blades are multiple, and the inner sides of the multiple impeller blades are installed on a shaft at intervals. The rear end of the pyroelectric sensor housing is fixedly installed on the front side of the middle part of the shaft. The lower end of the shaft is fixedly installed together with the upper end of the generator shaft. The lower end of the generator housing is fixedly installed on the upper end of the outer casing. The detection circuit is installed inside the outer casing. The upper end of the power output shaft of the motor reduction mechanism is fixedly installed together with the lower outer end of the outer casing. The lower end of the motor reduction mechanism is fixedly installed on the transformer side. The rotating power supply mechanism includes an inner sleeve, a metal slip ring, and a metal contact piece. The inner sleeve is fixed to the lower part of the shaft and located on the upper end of the generator shaft. Two The inner sides of the metal slip rings are fixedly installed at intervals on the outer ends of the sleeve. A support base is fixedly installed at one end of the housing of the motor reduction mechanism. The upper and lower ends of the two contact plates are fixedly installed at intervals on one side of the support base. The power output terminal of the generator is electrically connected to the signal input terminal of the detection circuit. The power output terminal of the detection circuit is electrically connected to the power input terminal of the pyroelectric sensor. The signal output terminal of the pyroelectric sensor is connected to the inner sides of the two slip rings via wires. The receiving circuit and the alarm circuit are installed in the component box. The signal input terminal of the alarm circuit is connected to the inner sides of the two slip rings via wires. The power output terminal of the receiving circuit is electrically connected to the power input terminal of the motor reduction mechanism.

2. The safety alarm device for use with a transformer according to claim 1, characterized in that, The inner sides of the two contact plates and the outer ends of the two slip rings are in sliding electrical contact, and the contact plates and slip rings are made of copper.

3. A safety alarm device for use with a transformer according to claim 1, characterized in that, The detection circuit includes an electrically connected bridge rectifier, diodes, capacitors, transistors, relays, a wireless transmission circuit module, and a battery. The positive power output terminal of the bridge rectifier is connected to the positive terminals of the capacitors, diodes, and one end of a resistor. The negative terminal of the diode is connected to the positive terminal of the battery, the positive power input terminal of the relay, and the control power input terminal. The other end of the resistor is connected to the base of the transistor. The collector of the transistor is connected to the negative power input terminal of the relay. The negative terminal of the capacitor is connected to the negative terminal of the battery, the emitter of the transistor, and the negative power input terminal of the wireless transmission circuit module. The positive power input terminal of the wireless transmission circuit module is connected to the normally open contact of the relay.

4. A safety alarm device for use with a transformer according to claim 3, characterized in that, Two contacts are connected together under one of the transmit buttons of the wireless transmission circuit module.

5. A safety alarm device for use with a transformer according to claim 1, characterized in that, The receiving circuit includes a wireless receiving circuit module and a relay that are electrically connected. The positive power input terminal of the wireless receiving circuit module is connected to the control power input terminal of the relay, the power output terminal of the wireless receiving circuit module is connected to the positive power input terminal of the relay, and the negative power input terminal of the wireless receiving circuit module is connected to the negative power input terminal of the relay.

6. A safety alarm device for use with a transformer according to claim 1, characterized in that, The alarm circuit includes resistors, transistors, relays, and an alarm connected via circuit board wiring. The positive power input terminal of the relay is connected to the control power input terminal. One end of the first resistor and one end of the second resistor are connected to the base of the transistor. The other end of the second resistor is connected to the emitter of the transistor and the negative power input terminal of the alarm. The normally open contact of the relay is connected to the positive power input terminal of the alarm.

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