CN108053623A - A kind of alarm - Google Patents

Abstract

This application belongs to the technical field of electric alarm equipment, and provides an alarm, including a first DC power supply, a buzzer, an insulating sheet, an exposed positive electrode, and an exposed negative electrode; the exposed positive electrode and the exposed The negative electrodes of the negative electrodes are arranged on the insulating sheet at intervals; the exposed positive electrodes are connected to the positive poles of the first direct current power supply, and the exposed negative electrodes are connected to the negative poles of the first direct current power supply; the buzzer connected in series on the path formed by the exposed positive electrode, the exposed negative electrode and the first DC power supply. When water enters the insulating sheet and becomes damp or dust accumulates, a short circuit occurs between the exposed positive electrode and the exposed negative electrode, and the buzzer is powered by the DC power supply to sound an alarm. Solve the problem of opening the outdoor cabinets one by one, which is inefficient, easy to miss, great safety hazards and unnecessary wear and tear on the cabinet seal.

Description

an alarm

technical field

The application belongs to the technical field of electric alarm equipment, and in particular relates to an alarm.

Background technique

In the long-distance transmission of electric power, the substation is an important physical node of the distribution network. The safe, stable and hidden danger-free operation of substations is a necessary condition to ensure the continuous and stable supply of electricity.

The various cabinets of the substation are mostly in the outdoor environment due to actual needs. Although these outdoor cabinets are all sealed cabinets, DC grounding accidents caused by water ingress are prone to occur in hot and humid seasons such as the rainy season or after long-term work. Opening the outdoor cabinets one by one for inspection during the high-incidence period of accidents is inefficient, has great potential safety hazards, and causes unnecessary wear and tear on the seals of the cabinets.

Contents of the invention

In view of this, the embodiment of the present application provides an alarm to solve the problem of low efficiency, great safety hazards, and unnecessary wear and tear on the seal of the cabinet by opening the outdoor cabinets one by one during the high accident period.

An embodiment of the present application provides an alarm, including:

The first DC power supply, buzzer, insulating sheet, exposed positive electrode and exposed negative electrode;

The exposed positive electrode and the exposed negative electrode are arranged on the insulating sheet; the exposed positive electrode is connected to the positive electrode of the first DC power supply, and the exposed negative electrode is connected to the first DC power supply. The negative pole of the power supply; the buzzer is connected in series to the path formed by the exposed positive electrode, the exposed negative electrode and the first DC power supply.

Further, the thickness of the insulating sheet is 0.05mm-0.2mm.

Further, the exposed positive electrode and the exposed negative electrode form interdigitated electrodes.

Further, the distance between the fingers of the interdigitated electrode is 0.1mm-0.3mm.

Further, the alarm also includes a switch; the switch is connected in series to the path formed by the exposed positive electrode, the exposed negative electrode, the buzzer and the first DC power supply.

Further, the alarm also includes a second DC power supply, a drying device, a dust suction device and a relay;

The coil of the relay is connected in series on the path formed by the exposed positive electrode, the exposed negative electrode, the buzzer and the first DC power supply; the drying device and the dust collector The device is connected in parallel to both ends of the second DC power supply; the normally open switch of the relay is connected in series to the path formed by connecting the second DC power supply, the drying device and the dust collection device.

Further, the drying device includes a blower driven by a DC motor, a heating wire and a desiccant;

The heating wire is arranged at the air outlet of the hair dryer, and the desiccant is located at the air inlet of the hair dryer; the hair dryer is connected in parallel with the heating wire.

Further, the dust collection device includes a suction fan driven by a DC motor, a dirt box and a desiccant;

The desiccant is located at the air inlet of the suction fan, and the dirt box is located at the air outlet of the suction fan.

Further, the alarm also includes a timing switch;

The timing switch is connected in parallel at both ends of the buzzer;

The timing switch is closed, and the buzzer is short-circuited; when a short circuit occurs between the exposed positive electrode and the exposed negative electrode, the timing switch starts timing, and the drying device and the The dust collection device starts to energize to dry and remove dust from the outdoor box; after the timing time reaches the preset control time, the timing switch is turned off, and the buzzer sounds an alarm when it is powered on.

Further, the alarm also includes a wireless transmitting device;

The wireless transmitting device is connected in parallel at both ends of the buzzer; when the wireless transmitting device is powered on, it transmits an alarm signal to a remote monitoring host.

Compared with the prior art, the technical solution of the embodiment of the present application has the following beneficial effects:

The alarm device provided by the embodiment of the present application includes a first DC power supply, a buzzer, an insulating sheet, a bare positive electrode and a bare negative electrode; the bare positive electrode and the bare negative electrode are spaced between the on the insulating sheet; the exposed positive electrode is connected to the positive pole of the first DC power supply, and the exposed negative electrode is connected to the negative pole of the first DC power supply; the buzzer is connected in series to the exposed positive electrode , The exposed negative electrode is connected to the path formed by the first DC power supply. When water enters the insulating sheet and becomes damp or dust accumulates, a short circuit occurs between the exposed positive electrode and the exposed negative electrode, and the buzzer is powered by the DC power supply to sound an alarm. Solve the problem of opening the outdoor cabinets one by one, which is inefficient, easy to miss, great safety hazards and unnecessary wear and tear on the cabinet seal.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the accompanying drawings that need to be used in the descriptions of the embodiments or the prior art will be briefly introduced below. Obviously, the accompanying drawings in the following description are only for the present application For some embodiments, those of ordinary skill in the art can also obtain other drawings based on these drawings without paying creative efforts.

Fig. 1 is a schematic diagram of the alarm device provided by the first embodiment of the present application;

Fig. 2 is a schematic diagram of the alarm device provided by the second embodiment of the present application;

Fig. 3 is a schematic diagram of the alarm device provided by the third embodiment of the present application;

Fig. 4 is a schematic diagram of an alarm provided by a fourth embodiment of the present application.

Wherein, each reference sign in the figure:

1-first DC power supply; 2-buzzer; 3-insulation sheet; 4-bare positive electrode; 5-bare negative electrode; 6-switch; 7-second DC power supply; 8-relay; 81- Relay coil; 82-relay normally open switch; 9-drying device; 91-DC motor of hair dryer; 92-heating wire; 10-dust suction device; 101-DC motor of suction fan; 11-timer switch; device; 13-monitoring host.

Detailed ways

In the following description, specific details such as specific system structures and technologies are presented for the purpose of illustration rather than limitation, so as to thoroughly understand the embodiments of the present application. It will be apparent, however, to one skilled in the art that the present application may be practiced in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present application with unnecessary detail.

In order to illustrate the technical solutions described in this application, specific examples are used below to illustrate.

Please refer to Figure 1, which is a schematic diagram of the alarm provided by the first embodiment of the present application, including:

A first DC power supply 1, a buzzer 2, an insulating sheet 3, an exposed positive electrode 4 and an exposed negative electrode 5;

The exposed positive electrode 4 and the exposed negative electrode 5 are arranged at intervals on the insulating sheet 3; the exposed positive electrode 4 is connected to the positive pole of the first DC power supply 1, and the exposed negative electrode 5 is connected to the negative pole of the first DC power supply 1; the buzzer 2 is connected in series to the path formed by connecting the exposed positive electrode 4, the exposed negative electrode 5 and the first DC power supply 1 superior.

The exposed positive electrode 4 is an exposed metal, and the exposed metal can be sheet-shaped or other irregular shapes, and is connected to the positive electrode of the first DC power supply 1; similarly, the exposed negative electrode The electrode 5 is also a bare metal, and the bare metal can be sheet-shaped or other irregular shapes, and there are as many adjacent side lengths as possible with the spaced apart exposed positive electrode 4, and the first direct current Negative connection of power supply 1. When the insulating sheet 3 is flooded with moisture or dust is accumulated, although the exposed positive electrode 4 and the exposed negative electrode 5 are spaced apart, the exposed positive electrode 4 and the exposed negative electrode 5 are separated by water or dust. When the exposed negative electrode 5 is short-circuited, the buzzer 2 is powered by the first DC power supply 1 and sounds an alarm.

The insulating sheet 3 is placed on the bottom surface or the lower side of the outdoor cabinet. The thinner the insulating sheet 3 is, the more sensitive the exposed positive electrode 4 and the exposed negative electrode 5 disposed on the insulating sheet 3 are to the detection of possible water accumulation in the outdoor cabinet. However, it is necessary to ensure the insulation between the exposed positive electrode 4 and the exposed negative electrode 5 and the outdoor cabinet, and the thickness of the insulating sheet 3 is 0.05mm-0.2mm, generally set to 0.1mm. The size of the insulating sheet 3 is related to the size of the outdoor cabinet.

Both the exposed positive electrode 4 and the exposed negative electrode 5 are easily conductive metals, and the exposed positive electrode 4 and the exposed negative electrode 5 are evenly arranged on the insulating sheet 3; the exposed The positive electrode 4 and the exposed negative electrode 5 form an interdigitated electrode. The smaller the distance between the fingers in the interdigitated electrodes, the more sensitive the detection device formed by the arrangement of the exposed positive electrodes 4 and the exposed negative electrodes 5; The sensitivity and reliability of the detection device formed by the arrangement of the exposed positive electrode 4 and the exposed negative electrode 5, the distance between the fingers in the interdigitated electrode is 0.1mm-0.3mm, generally set is 0.2mm; the longer the finger length of the interdigitated electrode fingers, the better, the more the number of the interdigitated electrode fingers, the better the finger length of the interdigitated electrode fingers and the The number is related to the size of the insulating sheet.

In the embodiment of the present application, the buzzer 2 sounds an alarm through the short circuit between the exposed positive electrode 4 and the exposed negative electrode 5, which solves the problem of opening the outdoor cabinets one by one for inspection during the high accident period, which is inefficient and easy. Omission, large potential safety hazards and unnecessary wear and tear on the box seal.

Please refer to FIG. 2 , which is a schematic diagram of the alarm provided by the second embodiment of the present application. The exposed positive electrode 4 and the exposed negative electrode 5 form an interdigital electrode, and a switch 6 is also included.

The switch 6 is connected in series to the path formed by the exposed positive electrode 4 , the exposed negative electrode 5 , the buzzer 2 and the first DC power supply 1 .

The alarm detects the working state, and the switch 6 remains closed; when the buzzer 2 in the alarm sounds an alarm, the outdoor cabinet is manually opened, and the switch 6 is disconnected before drying and dust removal. , the alarm stops working, and the buzzer 2 stops ringing; after the manual drying and dust removal is completed, the switch 6 is closed, the alarm starts to detect, and the buzzer 2 continues to be powered off and silent, Indicates that the hidden danger of the alarm has been eliminated, and the outdoor cabinet is closed.

In the embodiment of the present application, the exposed positive electrode 4 and the exposed negative electrode 5 are formed into interdigitated electrodes, and the distance between the interdigits is reduced as much as possible, and the length of the interdigits and the length of the interdigits are increased as much as possible. increase the detection sensitivity of the exposed positive electrode 4 and the exposed negative electrode 5; and add the switch 6 in the loop to solve the problem that the buzzer still keeps ringing after opening the cabinet, The power of the first DC power supply 1 is saved.

Please refer to FIG. 3 , which is a schematic diagram of the alarm provided by the third embodiment of the present application. The alarm also includes a second DC power supply 7 , a drying device 9 , a dust collection device 10 and a relay 8 ;

The coil 81 of the relay 8 is connected in series to the path formed by connecting the exposed positive electrode 4, the exposed negative electrode 5, the buzzer 2, the switch 6 and the first DC power supply 1 above; the drying device 9 and the dust collection device 10 are connected in parallel to both ends of the second DC power supply 7; the normally open switch 82 of the relay 8 is connected in series to the second DC power supply 7, the The drying device 9 and the dust suction device 10 are connected on the path formed.

When the insulating sheet 3 is flooded with moisture or dust accumulates, a short circuit occurs between the exposed positive electrode 4 and the exposed negative electrode 5, the buzzer 2 is powered by the DC power supply, and an alarm sounds The coil 81 of the relay 8 is energized, the normally open switch 82 of the relay 8 is closed, the second DC power supply 7 is turned on to supply power, the drying device 9 and the dust collection device 10 start to work, and dry and remove dust; After the exposed positive electrode 4 and the exposed negative electrode 5 are dry and clean, the insulation between the exposed positive electrode 4 and the exposed negative electrode 5 is disconnected, and the buzzer 2 is powered off; The coil 81 of the relay 8 is de-energized, the normally open switch 82 of the relay 8 is de-energized, the second DC power supply 7 is de-energized, and the drying device 9 and the dust-absorbing device 10 stop working.

In the embodiment of the present application, the second DC power supply 7 is different from the first DC power supply 1, the first DC power supply 1 supplies power to the buzzer 2, and the voltage and current requirements are not high; The second DC power supply 7 needs to supply power to the drying device 9 and the dust collection device 10, and requires a relatively high operating voltage and current; therefore, the second DC power supply 7 and the first DC power supply 1 cannot be substituted for each other.

Further, the embodiment of the present application may also include an uninterrupted DC power supply; the uninterrupted DC power supply is connected to the power supply in the outdoor cabinet, and is respectively supplied to the first DC power supply 1 and The second DC power supply 7 .

Further, the drying device 9 includes a blower driven by a DC motor, a heating wire and a desiccant; the heating wire is arranged at the blower outlet position of the blower, and the desiccant is located at the air inlet position of the blower; the blower The DC motor is connected in parallel with the heating wire.

The desiccant is located at the air inlet of the hair dryer to dry the air intake of the hair dryer; the heating wire is arranged at the air outlet of the hair dryer to heat the airflow blown out by the hair dryer; Working in the outdoor cabinet, circulation heating and drying the sealed outdoor cabinet.

Further, the dust collection device 10 includes a suction fan driven by a DC motor, a dirt box and a desiccant; the desiccant is located at the air inlet of the suction fan, and the dirt box is located at the air outlet of the suction fan Location.

The desiccant is located at the air inlet of the suction fan, and dries the air intake of the suction fan; the dirt box is located at the air outlet of the suction fan, and absorbs the inhaled dust and impurities in the dirt box; The suction fan works in the sealed outdoor cabinet to cycle dry and clean the sealed outdoor cabinet.

In the embodiment of the present application, the rotation speed of the DC motor of the blower is opposite to that of the DC motor of the suction fan, that is, the DC motor of the suction fan is connected in parallel with the DC motor of the blower after reverse connection.

Further, after the alarm continues to sound for a long time or after a period of continuous monitoring work, replace the desiccant in the drying device and the dust collection device, clean the dirt box, and dry and clean the alarm The outdoor cabinet where the device is located.

The embodiment of the present application adds the self-rescue function of the alarm to automatically remove the hidden danger of the alarm; in the face of the normal external environment, it is obviously not caused by a particularly serious hidden danger. The sound of the alarm does not require the staff to open the The outdoor cabinet can eliminate hidden dangers by itself, saving a lot of manpower and material resources; but in the face of emergency situations such as rain and snow, the sound of the alarm caused by the alarm, often cannot solve the hidden dangers at the first time, which will cause serious consequences, but due to all The outdoor cabinets where the above-mentioned alarms are located are generally arranged scattered within a certain range, and it is easy for the staff to manually check them one by one. Every time the outdoor cabinet is opened, it will cause a certain degree of wear and tear on the sealing of the outdoor cabinet. The drying device and the dust collection device added to the alarm can greatly alleviate or even solve the problem of the outdoor cabinet. It saves manpower and material resources, and wins precious time through self-rescue in an emergency to alleviate the danger.

Please refer to FIG. 4 , which is a schematic diagram of the alarm provided by the fourth embodiment of the present application. The DC motor 101 of the suction fan is connected in parallel with the DC motor 91 of the blower and the heating wire 92 after reverse connection, and connected with the first Two DC power sources 7, the normally open switch 82 of the relay form a circuit;

The alarm also includes a timing switch 11 and a wireless transmitting device 12 .

The timing switch 11 is closed to short-circuit the buzzer 2; when a short circuit occurs between the exposed positive electrode 4 and the exposed negative electrode 5, the timing switch 11 starts timing, and the The drying device 9 and the dust collection device 10 start to energize to dry and remove dust from the outdoor box; after the timing time reaches the preset control time, the timing switch 11 is turned off, and the buzzer 2 sounds an alarm when it is powered on .

The timer switch 11 is a countdown electronic switch set according to the preset control time, and the countdown time is equal to the preset control time; after the timer switch is energized, the countdown starts, and after the countdown ends, the timer switch acts ; After the timing switch is powered off, it is reset and cleared, and the timing switch returns to its original state.

The preset control time is the countdown switch action time set by the timing switch, and the length of the control time can be set considering the volume of the alarm and the outdoor cabinet where the alarm is located and the structure of the internal components; The preset control time is 0.5min-3min.

In the embodiment of the present application, after a short circuit occurs between the exposed positive electrode 4 and the exposed negative electrode 5, the timing switch 11 is powered on, the switch is kept closed and the countdown starts; after the countdown ends, the The timer switch 11 is turned off; after the exposed positive electrode 4 and the exposed negative electrode 5 are isolated and disconnected again, the timer switch 11 is reset and reset to return to the closed state.

Further, the wireless transmitting device 12 is connected in parallel at both ends of the buzzer 2; when the wireless transmitting device 12 is powered on, it transmits an alarm signal to the remote monitoring host 13.

In the embodiment of the present application, the wireless transmitting device 12 transmits a wireless alarm signal to the outside while the buzzer 2 sounds an alarm; the remote monitoring host 13 receives the wireless alarm signal and reminds Warning, and record and store the alarm signal at the same time.

Further, the remote monitoring host will number the wireless transmitting device corresponding to the received wireless alarm signal, and record the location of the corresponding numbered wireless transmitting device and the information of the outdoor cabinet where it is located; the remote When the monitoring host at the end receives different wireless alarm signals, it can distinguish alarms and give corresponding prompts.

The embodiment of the present application adds the function of the buzzer to sound the alarm with a delay and the function of sending an alarm signal to the remote end under the self-rescue function of the alarm. Since the exposed positive electrode and the exposed negative electrode set by the alarm are relatively sensitive, it is easy to have a short-term alarm that is automatically released due to the self-rescue function, and the buzzer adds a timing switch to sound the alarm with an appropriate delay , saving manpower and material resources; the scope of the buzzer sounding alarm reminder is limited, adding the wireless transmitting device, expanding the reminder range and reminder mode of the alarm, and enhancing the reminder range and reminder of the alarm alarm precision.

The above-described embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: it can still implement the foregoing embodiments Modifications to the technical solutions described in the examples, or equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the application, and should be included in the Within the protection scope of this application.

Claims (10)

1. An alarm, characterized in that, comprising: The first DC power supply, buzzer, insulating sheet, exposed positive electrode and exposed negative electrode; The exposed positive electrode and the exposed negative electrode are spaced apart on the insulating sheet; the exposed positive electrode is connected to the positive electrode of the first direct current power supply, and the exposed negative electrode is connected to the first direct current power supply. The negative pole of the DC power supply; the buzzer is connected in series to the path formed by the exposed positive electrode, the exposed negative electrode and the first DC power supply. 2. The alarm device according to claim 1, characterized in that, the thickness of the insulating sheet is 0.05mm-0.2mm. 3. The alarm device according to claim 1, wherein the exposed positive electrode and the exposed negative electrode form an interdigitated electrode. 4. The alarm device according to claim 3, characterized in that the distance between the fingers of the interdigitated electrodes is 0.1mm-0.3mm. 5. alarm device as claimed in claim 1, is characterized in that, also comprises: switch; The switch is connected in series on the path formed by the exposed positive electrode, the exposed negative electrode, the buzzer and the first DC power supply. 6. The alarm device according to claim 1, further comprising: Second DC power supply, drying device, dust suction device and relay; The coil of the relay is connected in series on the path formed by the exposed positive electrode, the exposed negative electrode, the buzzer and the first DC power supply; the drying device and the dust collector The device is connected in parallel to both ends of the second DC power supply; the normally open switch of the relay is connected in series to the path formed by connecting the second DC power supply, the drying device and the dust collection device. 7. The alarm device according to claim 6, wherein the drying device comprises a blower driven by a DC motor, a heating wire and a desiccant; The heating wire is set at the air outlet of the hair dryer, and the desiccant is located at the air inlet of the hair dryer; The blower is connected in parallel with the heating wire. 8. alarm device as claimed in claim 6, is characterized in that, described dust suction device comprises the suction blower driven by DC motor, dirty box and desiccant; The desiccant is located at the air inlet of the suction fan, and the dirt box is located at the air outlet of the suction fan. 9. The alarm device according to claim 6, further comprising: timer switch; The timing switch is connected in parallel at both ends of the buzzer; The timing switch is closed, and the buzzer is short-circuited; when a short circuit occurs between the exposed positive electrode and the exposed negative electrode, the timing switch starts timing, and the drying device and the The dust collection device starts to energize to dry and remove dust from the outdoor box; after the timing time reaches the preset control time, the timing switch is turned off, and the buzzer sounds an alarm when it is powered on. 10. The alarm device according to claim 6, further comprising: wireless transmitter; The wireless transmitting device is connected in parallel at both ends of the buzzer; when the wireless transmitting device is powered on, it transmits an alarm signal to a remote monitoring host.