CN204719116U - Alarming in short range of electric power wrister - Google Patents

Abstract

The utility model discloses an electric alarm wrist guard, which relates to the technical field of electric power construction safety. It includes a wrist guard body, a near-electric alarm device is provided in the middle of the wrist guard body, a matching insulating gasket is provided between the near-electric alarm device and the wrist guard body, and adhesive pads are connected at both ends of the wrist guard body. Buckle, the Velcro is composed of a round hair end and a bristle end, and the two ends of the wrist guard body are respectively connected with a round hair end and a bristle end; the inside of the near electric alarm device is provided with a near electric alarm circuit. The near-point safety alarm of the wrist guard is accurate, easy to carry, easy to use and easy to operate, and can automatically alarm to ensure the personal safety of witnesses.

Description

Proximity alarm wristband

technical field

The utility model relates to the technical field of electric power construction safety.

Background technique

With the gradual strengthening of power grid construction, the intensity of power work is increasing, resulting in frequent occurrence of power safety accidents. Human unsafe behavior is the enemy of safe production in power systems. Some practitioners do not have a strong sense of safety, think about problems according to conventional thinking, have a weak sense of safety, and have poor self-protection awareness. Accidents, the potential danger points and sources of danger in the operation and operation are not analyzed at all, and the possible disasters are underestimated or not noticed at all. The carelessness of the staff may stray into the electrified area and climb the electrified pole by mistake, or cause electric shock accidents due to illusions and mistakes. Existing safety tools are not enough to fully guarantee the safety of personal and power grids, and prevent accidents from happening.

Utility model content

The technical problem to be solved by the utility model is to provide a near-point alarm wristband, which has accurate near-point safety alarm, is easy to carry, easy to use, easy to operate, and can automatically alarm to ensure the witness's personal safety.

In order to solve the above technical problems, the technical solution adopted by the utility model is: a proximity alarm wristband, including a wristband body, a proximity alarm device is provided in the middle of the wristband body, and a proximity alarm device is installed inside the proximity alarm device. There is a near-electrical alarm circuit, which includes induction electric contacts, resistors R1, R2, R3, R4, R5, R6, R7, R8, sliding resistor RP, capacitors C1, C2, C3, C4, and transistor Q1 , Q2, Q3, field effect tube Q4, chip IC, light-emitting diode D1, buzzer HA, power supply; the positive end of the power supply is connected to the negative pole of the power supply through resistor R4, field effect tube Q4, resistor R3, resistor R1, and resistor R2 in turn The sensing electric contact is connected at the junction of resistors R3 and R1, the drain of field effect transistor Q4 is connected to resistor R4, the gate of field effect transistor Q4 is connected to resistor R3, the source of field effect transistor Q4 is connected to transistor Q1 The base of the triode Q1 is connected to the junction of the drain of the field effect transistor Q4 and the resistor R4; the emitter of the triode Q1 is connected to the negative pole of the power supply through the sliding resistor RP, and the sliding end of the sliding resistor RP is connected to the capacitor C1. Resistor R1 is connected to the node of R2; after capacitors C2 and C3 are connected in series, one end is connected to the node of field effect transistor Q4 and resistor R3, the other end is connected to the node of resistor R2 and sliding resistor RP, and one end of capacitor C4 It is connected to the node of the sliding end of the capacitor C1 and the sliding rheostat, and the other end is connected to the node of the capacitor C3 and the sliding rheostat; the base of the transistor Q2 is connected to the collector of the transistor Q1 through the resistor R5, and the collector of the transistor Q2 is connected to the collector of the transistor Q2 through the resistor R6, The light-emitting diode D1 is connected to the positive pole of the power supply, the emitter of the transistor Q2 is connected to the negative pole of the power supply, the pin 1 of the chip IC is connected to the negative pole of the power supply, the pin 2 of the chip IC is connected to the collector of the transistor Q2, and the pin 3 of the chip IC is connected to the collector of the transistor Q2. The resistor R7 is connected to the base of the transistor Q3, the pin 4 of the chip IC is connected to the collector of the transistor Q3 through the buzzer HA, and the pin 4 of the chip IC is also connected to the positive pole of the power supply, and the pin 5 of the chip IC is connected to the positive pole of the power supply through the resistor R8 is connected to pin 6 of the chip IC, and the emitter of the transistor Q3 is connected to the negative pole of the power supply.

Preferably, a suitable insulating gasket is provided between the proximity alarm device and the wrist guard body.

Preferably, a Velcro tape is connected to both ends of the wrist guard body, and the Velcro tape is composed of a round hair end and a bristle end, and the two ends of the wrist guard body are respectively connected with a round hair end and a bristle end.

The beneficial effects produced by adopting the above-mentioned technical solution are: the utility model performs front-end analysis and processing on the received induction signal, takes out the 50HZ power frequency signal, removes the interference signal through digital filtering, analyzes its signal strength, and when it reaches the preset value, Send an alarm signal to the receiving end, and the receiving end will alarm after receiving the signal, prompting the user that the equipment is close to strong electricity, please pay attention to safety, the near-electricity alarm circuit only warns against power frequency 50-60HZ above 220V, and the circuit resists interference through digital filtering , Stable and reliable, the equipment is mainly used for outdoor work, the detection level can be adjusted according to the needs; the current and voltage changes after the induction electric contact receives, that is, the change of the charge of the C1 capacitor leads to the slight change of the sliding resistance RP through the continuous accumulation of the capacitor Coulomb force Or reduce the variable contact with the field effect transistor Q4, resulting in the formation of paths in different parts of the right line, changing the resistance through the charge force to change the voltage and current, and alarming through equipment such as the amplifier chip IC, which is easy to carry, practical, and flexible to use , Easy to operate, can automatically alarm and further ensure personal safety.

Description of drawings

Fig. 1 is a structural representation of the utility model;

Fig. 2 is Fig. 1 near electricity alarm circuit;

Wherein, 1. wrist guard body, 2. electric alarm device, 3. insulating gasket, 4. induction electric contact, 5. round hairy end, 6. bristle hairy end.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

As shown in Fig. 1 and Fig. 2, the utility model is a kind of proximity alarm wristband, which is characterized in that: it includes a wristband body 1, and the middle part of the wristband body 1 is provided with a proximity alarm device 2. A suitable insulating gasket 3 is arranged between the alarm device 2 and the wrist guard body 1, and the two ends of the wrist guard body 1 are connected with a Velcro tape, and the Velcro tape is composed of a round hair end 5 and a bristle end 6 The two ends of the wrist guard body 1 are respectively connected with a round hair end 5 and a bristle end 6; the electric proximity alarm device 2 is provided with an electric proximity alarm circuit, and the electric proximity alarm circuit includes an induction electric contact 4, Resistors R1, R2, R3, R4, R5, R6, R7, R8, sliding resistance RP, capacitors C1, C2, C3, C4, triodes Q1, Q2, Q3, field effect tube Q4, chip IC, light-emitting diode D1, honeycomb Ringer HA, power supply; the positive end of the power supply is connected to the negative pole of the power supply through resistor R4, field effect transistor Q4, resistor R3, resistor R1, and resistor R2 in turn; the induction electric contact 4 is connected to the node of resistor R3 and R1, and the field The drain of the effect transistor Q4 is connected to the resistor R4, the gate of the field effect transistor Q4 is connected to the resistor R3, the source of the field effect transistor Q4 is connected to the base of the triode Q1, and the collector of the triode Q1 is connected to the drain of the field effect transistor Q4 pole and the junction of resistor R4; the emitter of triode Q1 is connected to the negative pole of the power supply through sliding resistor RP, and the sliding end of sliding resistor RP is connected to the junction of resistors R1 and R2 through capacitor C1; the capacitor C2 and C3 are connected in series At the junction of the gate of the field effect transistor Q4 and the resistor R3, the other end is connected to the junction of the resistor R2 and the sliding resistor RP, one end of the capacitor C4 is connected to the node of the sliding end of the capacitor C1 and the sliding rheostat, and the other end is connected to the capacitor C3 is connected to the node of the sliding rheostat; the base of the triode Q2 is connected to the collector of the triode Q1 through the resistor R5, the collector of the triode Q2 is connected to the positive pole of the power supply through the resistor R6 and the light-emitting diode D1, and the emitter of the triode Q2 is connected to the negative pole of the power supply , the pin 1 of the chip IC is connected to the negative pole of the power supply, the pin 2 of the chip IC is connected to the collector of the transistor Q2, the pin 3 of the chip IC is connected to the base of the transistor Q3 through the resistor R7, and the pin 4 of the chip IC is connected to the base of the transistor Q3 through The buzzer HA is connected to the collector of the transistor Q3, and the pin 4 of the chip IC is also connected to the positive pole of the power supply, the pin 5 of the chip IC is connected to the pin 6 of the chip IC through the resistor R8, and the emitter of the transistor Q3 is connected to the power supply. Negative connection.

Working principle of the utility model:

The utility model performs front-end analysis and processing on the received induction signal, takes out the 50HZ power frequency signal, eliminates the interference signal through digital filtering, analyzes its signal strength, and sends an alarm signal to the receiving end when the preset value is reached, and the receiving end is receiving After receiving the signal, it will alarm and remind the user that the equipment is close to strong electricity. Please pay attention to safety. The near-electricity alarm circuit only provides early warning for power frequency 50-60HZ above 220V. The circuit is anti-interference through digital filtering, which is stable and reliable. This equipment is mainly used for outdoor operations. , the detection level can be adjusted according to the needs; the current and voltage changes after the induction electric contact receives, that is, the change of the capacitance charge of C1 leads to the slight change of the sliding resistance RP. Contact causes different parts of the right line to form a path, and the resistance is changed by the charge force to change the voltage and current to alarm through the amplifier chip IC and other equipment. It is easy to carry, practical, flexible to use, easy to operate, and can automatically alarm and further protect personal Safety.

When overhauling overhead power lines and electrical equipment, if the alarm sound can be issued within the alarm distance, it indicates that the power line or electrical equipment is live, otherwise it is not live; On the insulating layer of one of the wires, if it can make a sound, it is a live wire; if an alarm signal is issued when the near-electric alarm wristband is close to the electrical equipment casing, it indicates that the casing is charged or leaking; when maintaining and testing three-phase electric overhead cable lines, First check whether the side phase is charged (that is, the vertical bottom of the side phase is tested). It must be pointed out that the operator wearing the proximity alarm wristband is at a certain position below the middle phase of the three-phase electricity (that is, at a position approximately equal to the distance between the three phase lines) and does not alarm because the electric fields cancel each other out, which also happens to indicate that the three-phase The transmission line power supply is normal. If one phase or two phases are broken, the electric field cannot cancel each other, and the above phenomenon will not occur; when the operator detects the same pole (same tower) transmission line or multi-layer transmission line, this product can accurately detect the closest near point above it. Whether the transmission line on the layer of the alarm wristband is live is free from interference from transmission lines on other layers.

The utility model has three voltage levels in total, as shown in the following table: it has a wide application range, is less affected by the environment, and has a long service life.

Claims (3)

1. A proximity alarm wristband, characterized in that: it includes a wristband body (1), the middle part of the wristband body (1) is provided with a proximity alarm device (2), and the proximity alarm device (2) There is a near-electrical alarm circuit inside, and the near-electrical alarm circuit includes induction electric contacts (4), resistors R1, R2, R3, R4, R5, R6, R7, R8, sliding resistance RP, capacitors C1, C2, and C3 , C4, transistor Q1, Q2, Q3, field effect tube Q4, chip IC, light-emitting diode D1, buzzer HA, power supply; the positive end of the power supply passes through resistor R4, field effect tube Q4, resistor R3, resistor R1, resistor R2 is connected to the negative pole of the power supply; the induction electric contact (4) is connected to the junction of resistors R3 and R1, the drain of field effect transistor Q4 is connected to resistor R4, the gate of field effect transistor Q4 is connected to resistor R3, and the field effect The source of the transistor Q4 is connected to the base of the transistor Q1, and the collector of the transistor Q1 is connected to the junction of the drain of the field effect transistor Q4 and the resistor R4; the emitter of the transistor Q1 is connected to the negative pole of the power supply through the sliding resistor RP, and the sliding resistor The sliding end of RP is connected to the junction of resistors R1 and R2 through capacitor C1; after capacitors C2 and C3 are connected in series, one end is connected to the junction of the gate of field effect transistor Q4 and resistor R3, and the other end is connected to resistor R2 and sliding resistor RP At the node of the capacitor C4, one end of the capacitor C4 is connected to the node of the sliding end of the capacitor C1 and the sliding rheostat, and the other end is connected to the node of the capacitor C3 and the sliding rheostat; the base of the transistor Q2 is connected to the collector of the transistor Q1 through the resistor R5, and the transistor The collector of Q2 is connected to the positive pole of the power supply through the resistor R6 and the light-emitting diode D1, the emitter of the transistor Q2 is connected to the negative pole of the power supply, the pin 1 of the chip IC is connected to the negative pole of the power supply, and the pin 2 of the chip IC is connected to the collector of the transistor Q2 , the pin 3 of the chip IC is connected to the base of the transistor Q3 through the resistor R7, the pin 4 of the chip IC is connected to the collector of the transistor Q3 through the buzzer HA, and the pin 4 of the chip IC is also connected to the positive pole of the power supply, The pin 5 of the chip IC is connected to the pin 6 of the chip IC through the resistor R8, and the emitter of the triode Q3 is connected to the negative pole of the power supply. 2. The proximity alarm wristband according to claim 1, characterized in that: a matching insulating gasket (3) is provided between the proximity alarm device (2) and the wristband body (1). 3. The near-electric alarm wristband according to claim 1, characterized in that: the two ends of the wristband body (1) are connected with a Velcro, and the Velcro is composed of a round hair end (5) and bristles end (6), and the two ends of the wrist guard body (1) are respectively connected with a round hair end (5) and a bristle end (6).