CN206321714U - A kind of long-range decompression alarm device of air - Google Patents

Abstract

The utility model discloses a remote pressure loss alarm device, which comprises a detection circuit for phase loss detection of a three-phase circuit. The detection circuit includes: first, second and third relays, wherein the first relay is electrically connected to phase A and N-phase, the second relay is electrically connected between B-phase and N-phase, and the third relay is electrically connected between C-phase and N-phase; The first judging element connected in series with the normally open switch of the relay, the second judging element connected in series with the normally open switch of the second relay, and the third judging element connected in series with the normally open switch of the third relay, wherein the first, second It is connected in parallel with the third judging element, and connected with the signal of the GPRS short message module. The utility model realizes the function of remote monitoring of three-phase circuit phase loss and power failure, and uses the GPRS short message module to send alarm messages to the mobile phones of the staff, which is convenient for the staff to grasp the abnormal situation of the power supply terminal at any time.

Description

A remote pressure loss alarm device

technical field

The utility model relates to the remote monitoring of short-phase and lack-of-phase of a three-phase circuit, in particular to a remote voltage loss alarm device.

Background technique

With the improvement of automation, people have higher and higher requirements for electricity safety and reliability. In many occasions, it is necessary to know the abnormal situation of power outage, lack of phase, etc. in real time, so as to take measures to avoid losses.

At present, voltage sensors are mostly used to detect power outages and abnormal power consumption due to lack of phases. This requires the processing of electronic equipment such as circuits and controllers, and professional maintenance is required, which brings inconvenience to the user terminal side.

Therefore, it is necessary to provide a remote voltage loss alarm device with simple structure and easy maintenance, which can send alarm information to power users when power failure or phase loss occurs, so as to remind users to take measures in time to avoid losses.

Utility model content

The purpose of the utility model is to provide a remote voltage loss alarm device with simple structure and easy maintenance, which is used for monitoring when the three-phase circuit is powered off or lacks phase.

For this reason, the utility model provides a remote voltage loss alarm device, which includes a detection circuit for phase loss detection of a three-phase circuit, and the detection circuit includes: a first relay, a second relay and a third relay, wherein the The first relay is electrically connected between phase A and phase N, the second relay is electrically connected between phase B and phase N, and the third relay is electrically connected between phase C and phase N; and the storage battery and A phase loss discrimination circuit, the phase loss discrimination circuit includes a first discrimination element connected in series with the normally open switch of the first relay, a second discrimination element connected in series with the normally open switch of the second relay, and a The third judging element connected in series with the normally open switch of the third relay, wherein the first judging element, the second judging element and the third judging element are connected in parallel, wherein the first judging element, the second judging element and the third judging element are connected in parallel. The judging element is used for signal connection with the GPRS short message module.

Further, the above detection circuit further includes a control switch, wherein the control switch is connected in series with the phase loss discrimination circuit.

Further, the above-mentioned remote voltage loss alarm device also includes a charging circuit for supplying power to the storage battery, and the charging circuit includes a first AC/DC conversion module, and/or a second AC/DC conversion module, and/or a second AC/DC conversion module. Three AC/DC conversion modules, wherein the first AC/DC conversion module is electrically connected between the A phase and the N phase, and the second AC/DC conversion module is electrically connected between the B phase and the N phase Between, the third AC/DC conversion module is electrically connected between the C-phase and the N-phase.

Further, the above-mentioned remote voltage loss alarm device further includes a GPRS short message module, wherein the GPRS short message module is connected in series with the phase loss discrimination branch, and is used to supply power to the GPRS short message module when there is a phase loss.

Further, the above-mentioned storage battery is a lithium battery.

Further, the above-mentioned remote pressure loss alarm device further includes an alarm lamp and/or a buzzer, and the alarm lamp and/or buzzer are connected in series with the phase loss discrimination circuit.

According to the remote loss of voltage alarm device of the present invention, the battery, three relays and three discriminant elements are used to realize the remote monitoring function of phase loss and power failure of the three-phase circuit. The GPRS SMS module is used to send alarm messages to the mobile phones of the staff, which is convenient for the staff to grasp the situation of the power supply terminal at any time, and to know the abnormality in time and take measures.

In addition to the purposes, features and advantages described above, the present invention has other purposes, features and advantages. Below with reference to figure, the utility model is described in further detail.

Description of drawings

The accompanying drawings constituting a part of this application are used to provide a further understanding of the utility model, and the schematic embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute improper limitations to the utility model. In the attached picture:

Fig. 1 is a wiring diagram of a remote pressure loss alarm device according to an embodiment of the present invention; and

Fig. 2 is a schematic diagram of the appearance of a remote pressure loss alarm device according to an embodiment of the present invention.

Explanation of reference signs

11. The first relay; 12. The second relay;

13. The third relay; 14. The first discrimination element;

15. The second discrimination element; 16. The third discrimination element;

17. Battery; 18. AC/DC conversion module;

19. Control switch; 20. GPRS SMS module;

21. Antenna; 22. Indicator lights;

23. Wiring pile.

detailed description

It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The utility model will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

Figures 1 and 2 illustrate some embodiments according to the present invention.

As shown in Figure 1 and Figure 2, the remote voltage loss alarm device includes a detection circuit for three-phase circuit phase loss detection, the detection circuit includes: a first relay 11, a second relay 12 and a third relay 13, wherein, The first relay 11 is electrically connected between phase A and phase N, the second relay 12 is electrically connected between phase B and phase N, and the third relay 12 is electrically connected between phase C and phase N and storage battery 17 and phase loss discrimination circuit, said phase loss discrimination circuit comprises the first discrimination element 14 connected in series with the normally open switch of said first relay 11, the first discrimination element 14 connected in series with the normally open switch of said 12 second relays Two judging elements 15, and a third judging element 16 connected in series with the normally open switch of the third relay 13, wherein the first judging element 14, the second judging element 15 and the third judging element 16 are connected in parallel, and the The first judging element 14 , the second judging element 15 and the third judging element 16 are used for signal connection with the GPRS short message module 20 .

Among them, the first, second and third judging elements are used to judge the on-off status of the branch where each judging element is located, and send the transition of on-off state to the GPRS short message module 20 . The GPRS short message module 20 is used to generate a corresponding short message according to the information sent by the discriminator and send it to the user's mobile phone.

According to the remote voltage loss alarm device of the present invention, the phase loss and power failure of the three-phase circuit are monitored by a physical circuit. The detection circuit uses a storage battery, three relays and three discriminant elements, and has a simple logical structure and is easy to maintain. Three relays are connected to the AC circuit. When the three-phase circuit is normal, the normally open switch of the relay remains open. When the three-phase circuit loses phase or fails, at least one relay is powered off, so that the normally open switch is closed, thereby Supply power to the GPRS SMS module and provide a phase-loss signal to the GPRS power supply module by the discriminant element, so as to realize the purpose of remote monitoring.

In one embodiment, the battery 17 is powered by the AC/DC conversion module 18, and the battery is preferably a lithium battery. When the three-phase line is charged, the AC/DC module supplies power and charges the lithium battery. When the line is powered off, the lithium battery supplies power. The user selects the capacity of the lithium battery according to the actual needs. The AC/DC conversion module can be connected between phase A and phase N, between phase B and phase N, and between phase C and phase N.

In one embodiment, as shown in FIG. 2 , the detection circuit further includes a control switch 19 connected in series with the phase loss discrimination circuit. When the control switch is closed, the alarm device works normally.

In one embodiment, as shown in Figure 2, the above-mentioned remote pressure loss alarm device also includes an indicator light 22 and/or a buzzer for alarming, and the indicator light and/or buzzer are related to the phase loss discrimination circuits in series. In order to facilitate on-site checking which one of the three-phase electricity is missing.

In one embodiment, the GPRS short message module is obtained by purchasing from the market, and the GPRS short message module is triggered by the discriminator to send short messages when there is a phase loss or a power failure. For example, if you send three text messages in 4 hours, 12 hours, and 36 hours, the battery will run out of power, so the setting will not continue to send text messages.

The working process of the present utility model is described below.

If a three-phase power user needs to know the power supply situation in time, then connect the device with the ABC three-phase line and the N neutral line, close the switch, and the device starts to work. When the power supply is connected normally, the relay works normally, the normally open switch remains disconnected, and the GPRS SMS module is not connected to the circuit and does not work.

If the A phase of the power supply is powered off or broken, then the relay 1 (KT1) stops working, the normally open switch 1 turns from off to on, the GPRS SMS module and the judging element 1 are energized, and the judging element 1 judges that the A phase is powered off or off and informs GPRS short message module, the GPRS short message module sends short messages according to the set content and contacts. Similarly, the situation when the BC phase single-phase power failure can be obtained.

When the AB two-phase power is cut off, the relays 1 and 2 (KT1, KT2) stop working, the normally open switches 1 and 2 turn from off to on, the GPRS SMS module, the discrimination element 1, and the discrimination element 2 are energized, and the discrimination elements 1, 2 Discriminant element 2 judges the power failure or power failure of AB two-phase and informs the GPRS SMS module. The GPRS SMS module sends the SMS according to the set content and contacts. Similarly, the situation of AC and BC two-phase power failure or power failure can be obtained. .

When the ABC three-phase power failure occurs, the relays 1, 2, 3 (KT1, KT2, KT3) stop working, the normally open switches 1, 2, 3 turn from off to on, the GPRS SMS module, the discrimination element 1, and the discrimination Element 2 and discrimination element 3 are energized, and discrimination element 1, discrimination element 2, and discrimination element 3 judge ABC three-phase power failure or power failure and inform the GPRS SMS module, and the GPRS SMS module sends the SMS according to the set content and contacts. The user takes timely measures according to the content of the received short message to avoid loss.

The above descriptions are only preferred embodiments of the utility model, and are not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present utility model shall be included in the protection scope of the present utility model.

Claims (6)

1. A remote voltage loss alarm device, comprising a detection circuit for three-phase circuit phase loss detection, characterized in that, the detection circuit includes: A first relay, a second relay and a third relay, wherein the first relay is electrically connected between phase A and phase N, the second relay is electrically connected between phase B and phase N, and the third relay is electrically connected between phase A and phase N. a relay is electrically connected between phase C and phase N; and A storage battery and a phase loss discrimination circuit, the phase loss discrimination circuit includes a first discrimination element connected in series with the normally open switch of the first relay, a second discrimination element connected in series with the normally open switch of the second relay, and a The third judging element connected in series with the normally open switch of the third relay, wherein the first judging element, the second judging element and the third judging element are connected in parallel, Wherein, the first judging element, the second judging element and the third judging element are used for signal connection with the GPRS short message module. 2 . The remote voltage loss alarm device according to claim 1 , wherein the detection circuit further comprises a control switch, wherein the control switch is connected in series with the phase loss discrimination circuit. 3 . 3. The remote pressure loss alarm device according to claim 1, further comprising a charging circuit for supplying power to the storage battery, the charging circuit comprising a first AC/DC conversion module, and/or a second An AC/DC conversion module, and/or a third AC/DC conversion module, wherein the first AC/DC conversion module is electrically connected between the A phase and the N phase, and the second AC/DC conversion module It is electrically connected between the B phase and the N phase, and the third AC/DC conversion module is electrically connected between the C phase and the N phase. 4. remote pressure loss alarm device according to claim 1, is characterized in that, also comprises GPRS short message module, wherein, described GPRS short message module is connected with described lack of phase discrimination branch, is used for sending to all when lack of phase. The GPRS short message module is powered. 5. The remote pressure loss alarm device according to claim 1, wherein the storage battery is a lithium battery. 6 . The remote pressure loss alarm device according to claim 1 , further comprising an alarm lamp and/or a buzzer, the alarm lamp and/or buzzer being connected in series with the phase loss discrimination circuit.