CN211293018U - Novel ammeter case is prevented fires device - Google Patents

Abstract

The utility model provides a novel ammeter case fire prevention device, which comprises an outer shell, be equipped with a plurality of ammeters in the shell, the ammeter lower extreme all is equipped with temperature probe, install the third wire on the temperature probe, be equipped with zero line row in the shell, the third wire is arranged with zero line and is connected, smoke detector is installed at the top in the shell, be equipped with ground wire row in the shell, still install ammeter case fire protection device in the shell, the last outer first wire and the second wire of being connected with of ammeter case fire protection device, be equipped with the pilot lamp on the ammeter fire protection device, be equipped with current transformer on the first wire, be equipped with voltage transformer on the second wire, be connected with the leading-out terminal copper bar between current transformer and the voltage transformer, voltage transformer top and the shell internally mounted have the service entrance switch. The utility model discloses an ammeter case firebreak device safe and reliable can monitor a plurality of ammeter cable temperatures simultaneously, can have the fire behavior of ammeter case.

Description

A new type of fire protection device for electric meter box

technical field

The utility model relates to a novel electric meter box fire prevention device.

Background technique

At present, the State Council is paying more and more attention to the prevention of electrical fires, and has issued relevant policies such as the "Notice on Comprehensive Management of Electrical Fires" to promote the development of electrical fire prevention. The meter box is the equipment closest to the user among the equipment installed by the power supply company. The electrical fire control of the meter box is the most direct life and property protection for the user.

Electrical fire-related products are already very common in the market, and most of these products are aimed at large power supply equipment such as switch cabinets. Of course, there are also some products that are suitable for meter boxes. However, these products have a single function (only measure temperature or smoke), and one device can only detect one meter. There are often multiple meters in the meter box, which means that multiple devices need to be installed, which undoubtedly increases a lot of costs. In addition, the factors that cause electrical fires include overcurrent, overload, leakage, etc. Simply detecting temperature or smoke cannot reflect the specific cause of electrical fires, nor can it prevent fires in time.

SUMMARY OF THE INVENTION

The purpose of the utility model is to provide a new type of fire protection device for electric meter box.

In order to achieve the above purpose, the present utility model adopts the following technical solutions: a novel electric meter box fire prevention device, comprising a casing, a plurality of electric meters are arranged in the casing, and the lower ends of the electric meters are all provided with temperature measuring probes, and the temperature measuring probes A third wire is installed on it, a neutral wire row is arranged in the casing, the third wire is connected with the neutral wire row, a smoke detector is installed on the top of the casing, and a ground wire row is arranged in the casing. An electric meter box fireproof device is also installed in the casing, a first wire and a second wire are connected to the outside of the electric meter box fireproof device, an indicator light is arranged on the electric meter fireproof device, and a current mutual inductance is arranged on the first wire. There is a voltage transformer on the second wire, an outlet copper bar is connected between the current transformer and the voltage transformer, an incoming switch is installed above the voltage transformer and inside the shell, the There is a shunt release on the incoming switch.

Further, the casing is provided with a wiring groove, and the third wire is connected to the neutral line along the wiring groove.

Further, the casing is also provided with a segmented delay alarm device, the alarm threshold of the segmented delay alarm device is set to multiple segments, and the interval time between adjacent alarm thresholds is n, 2min≤n≤ 6min.

Further, a short message module and a GPRS module are required in the casing, and both the short message module and the GPRS module are electrically connected with the segmented delay alarm device.

Further, it also includes a current detection circuit and a temperature detection circuit, the current detection circuit is electrically connected with the current transformer, the current transformer is also provided with a residual current transformer, and the residual current transformer is electrically connected to the current detection circuit. connection, the temperature detection circuit is electrically connected with the temperature probe

After adopting the above-mentioned technical scheme, the utility model has the following advantages:

1. There is a circuit temperature signal detection circuit inside the device. There is a corresponding set of temperature probe terminals outside the device, which can be connected to multiple temperature probes, and can monitor the temperature of the cables of multiple three-phase electricity meters or single-phase electricity meters at the same time. Compared with the traditional one-to-one inspection, it saves a lot of capital cost and space cost. Since there is only one set of devices, only one power supply is required, which greatly simplifies the installation process and saves installation costs.

2. There is a smoke detection signal receiving circuit inside the device, and the smoke detection device is connected with the smoke detection signal receiving circuit through the wiring terminal. When a fire occurs outside or the meter box catches fire for some reason, the smoke signal can be detected in time, and corresponding alarm and protection actions can be made. The smoke detection function, as a post-level protection function, can ensure that the fire signal can still be detected when the current, temperature and other signals are invalid, which further improves the reliability of the device.

3. There is a circuit current detection circuit inside the device, and the current value of each phase can be accurately measured by the current transformer installed on the main switch cable. The device can judge the load usage status through the current signal. When overloaded operation occurs, an alarm signal is sent out in time to notify the user to reduce the power consumption, and if necessary, start the protection action to cut off the main power supply to prevent the switch, cable or meter from causing fire due to overloaded operation.

4. The residual current detection circuit in the device is connected with the residual current transformer, which can monitor the residual current value in real time. When the residual current exceeds a certain value, an alarm signal will be issued, and if necessary, the protection action will be started to prevent the occurrence of fire. The residual current can not only cause fire, but if the leakage occurs in the meter box and the residual current flows into the earth through the meter box shell, the meter box shell will also be charged. At this time, if it comes into contact with the shell of the meter box, it is very likely that an electric shock accident will occur. Therefore, residual current monitoring can not only prevent fire, but also prevent electric shock accidents.

5. There is a relay output inside the device, which can control the action of the shunt release after being connected with the shunt release. When the protection action is triggered, the relay output circuit will start immediately, and the shunt release will act immediately after it is energized to cut off the main incoming switch to prevent the occurrence of more dangerous situations. The new meter box fire protection device breaks through the functional limitation of traditional meter box fire monitoring equipment that only alarms and does not control. The function that can control the occurrence of fire from the source at the critical moment.

6. The device adopts a segmented delay alarm, and the alarm threshold is set to multiple segments. After each level of the alarm threshold, the signal needs to remain above the threshold for a period of time before sending an alarm signal. It effectively solves the problem of false alarms in the traditional meter box fire monitoring equipment that alarms when the threshold value is exceeded. At the same time, the staff can take the corresponding best treatment plan in time according to the alarm signal to minimize the loss.

7. The device has a short message module and a GPRS module. When the alarm event is triggered, the device will alarm the user through SMS, WeChat message push and other methods. Users can obtain alarm information through multiple devices and channels such as mobile phones, computers, etc., and grasp the alarm level, alarm cause, meter box location and other information in time.

8. Each detection circuit has a corresponding indicator light. When the alarm event occurs, the corresponding indicator light on the device lights up, and the user can quickly locate the fault location and troubleshoot the cause of the fault according to the indicator light. When the main switch has been turned off, the battery in the device can be automatically put into use, continuing to maintain the state of the indicator light.

Description of drawings

Below in conjunction with accompanying drawing, the utility model is further described:

FIG. 1 is a schematic structural diagram of a novel electric meter box fire protection device proposed by the utility model.

FIG. 2 is a block diagram of the system structure of a new type of fire protection device for electric meter box proposed by the utility model.

The names of the parts marked in the figure are as follows:

1. Incoming switch; 2. Shunt release; 3. Voltage transformer; 4. Outgoing copper bar; 5. Current transformer; 6. Conductor; 7. Conductor; 8. Fire protection device of meter box; 9. Ground wire; 10. Electric meter; 11. Temperature probe; 12. Temperature probe wire; 13. Conductor; 14. Wiring slot; 15. Housing; 16. Smoke detector; 17. Indicator light; 18. Neutral wire Row.

Detailed ways

The present utility model will be further described below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the following "up", "down", "left", "right", "portrait", "horizontal", "inner", "outer", "vertical", "horizontal", " Words indicating orientation or positional relationship such as "top" and "bottom" are only based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the indicated device/element must have a A particular orientation or construction and operation in a particular orientation is therefore not to be construed as a limitation of the present invention.

As shown in FIG. 1 and FIG. 2 , the present invention provides a new type of fire protection device for an electric meter box, which includes an outer casing 15 , a plurality of electric meters 10 are arranged in the outer casing 15 , and the lower ends of the electric meters 10 are provided with temperature measuring probes 11 , and the temperature measuring probes 11 There is a third wire 13 installed on it, a neutral wire row 18 is arranged in the casing 15, the third wire 13 is connected to the neutral wire row 18, a smoke detector 16 is installed on the top of the casing 15, and a ground wire row 9 is arranged in the casing 15, An electric meter box fireproof device 8 is also installed in the housing 15. The electric meter box fireproof device 8 is connected with a first wire 6 and a second wire 7. The electric meter fireproof device 8 is provided with an indicator light 17, and the first wire 6 is provided with a current. Transformer 5, a voltage transformer 3 is arranged on the second wire 7, an outlet copper bar 4 is connected between the current transformer 5 and the voltage transformer 3, and an incoming switch is installed above the voltage transformer 3 and inside the casing 15 1. There is a shunt release 2 on the incoming switch 1.

In the present embodiment, the casing 15 is provided with a wiring slot 14 , and the third wire 13 is connected to the neutral wire row 18 along the wiring slot 14 .

In this embodiment, the casing 15 is also provided with a segmented delay alarm device, the alarm threshold of the segmented delay alarm device is set to multiple segments, and the interval time between adjacent alarm thresholds is n, 2min≤n≤ 6min. Specifically, in this embodiment, n is 4min.

In this embodiment, it also includes a current detection circuit, a temperature detection circuit and an MCU. The current detection circuit is electrically connected to the current transformer, and the current transformer is also provided with a residual current transformer, which is electrically connected to the current detection circuit. , The temperature detection circuit is electrically connected with the temperature probe. The MCU is processed by the commercial power and stored in the battery to supply power to the MCU. The MCU is also connected to a shunt release and a luminous alarm that are controlled by the relay output. The smoke detector is electrically connected to the MCU, and the smoke detector transmits commands to the MCU. The short message module and the GPRS module in the casing 15 are both electrically connected to the MCU, and the short message module and the GPRS module are both connected to the segment. The delay alarm device is electrically connected.

Among them, the temperature probe is used to detect the temperature of each cable, and the temperature probe is connected to the temperature measurement terminal in the control host through the extension wire, and the temperature measurement terminal sends the temperature signal to the temperature detection circuit.

After detecting the temperature signal, the main control chip MCU judges whether it is over-temperature, whether an alarm is required, and whether a protection action needs to be started.

The smoke detector is connected to the smoke detection terminal through an extension line, and the smoke detection circuit inputs the detected signal into the main control chip MCU through the switch value. The shunt release acts to cut off the main power.

At the same time, the host outputs through the control relay circuit, and uses the internal battery to supply power to trigger the sound and light alarm.

The sound and light alarm is connected with the relay circuit terminal through the wire. When the fire occurs, the host will trigger the sound and light alarm through the control relay.

The current transformer detects the current of each phase of the total power supply. The secondary end of the current transformer is connected to the terminal of the current detection circuit through the wire. The main control chip MCU obtains the real-time current value through the current detection circuit, and judges which level the current belongs to to determine whether Alarm or protection action is required.

The residual current transformer is used to detect the residual current. The secondary end of the residual current transformer is connected to the terminal of the residual current detection circuit through the wire. The main control chip MCU obtains the real-time residual current value through the residual current detection circuit, and determines which level the residual current belongs to. . If an alarm is required, the alarm information will be sent out through the GPRS module and the communication module. If the protection action needs to be started, control the output of the relay output circuit, control the action of the shunt release, and cut off the main power supply.

The shunt release is used to control the auxiliary equipment of the main circuit breaker trip. The two terminals of the shunt release are connected to the wiring terminals of the relay output circuit through wires. Through the shunt release, the device can realize external equipment to control the switch trip without communication function.

The new electric meter box fire protection device panel is equipped with LED indicator lights, each indicator light corresponds to a channel of detection signal, when an alarm event occurs when a channel signal is abnormal, the corresponding LED indicator light will be lit.

The GPRS module and the communication module are installed inside the device and are directly controlled by the main control chip MCU. When an alarm event occurs, the main control chip MCU controls the GPRS module and the communication module to send the alarm event to the user's mobile phone and PC, and the user can view the alarm information through mobile phone short messages and WeChat messages.

The power module consists of two parts, one is DC power supply and the other is AC power supply. In normal use, the AC power supply will supply power to the internal circuit after being processed by the power processing module, such as step-down, rectification, and filtering, and at the same time, it will charge the DC power supply. When the utility power disappears, the internal DC power supply is put into use to ensure that the LED indicators can continue to work.

It can be understood that the fire protection device of the electric meter box is also provided with various ways of canceling the alarm signal. Before the protection action, the alarm signal can be automatically canceled according to the current, temperature and other parameters return to normal. When the protection is activated, the alarm signal must be canceled locally.

It should be noted that, in this document, relational terms such as first and second are used only to distinguish one entity or operation from another entity, and do not necessarily require or imply any existence between these entities or operations. This actual relationship or order, and the terms "comprising", "comprising" or any other variation thereof, are intended to encompass a non-exclusive inclusion such that a process, method, article or device that includes a series of elements includes not only which elements, It also includes other elements not expressly listed or inherent to such a process, method, article or apparatus.

Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes and modifications can be made to these embodiments without departing from the spirit and circumstances of the present invention , substitutions and modifications, the scope of the present invention is defined by the appended claims and their equivalents.

Claims (5)

1. A novel electric meter box fireproof device comprises a shell and is characterized in that a plurality of electric meters are arranged in the shell, the lower ends of the electric meters are provided with temperature measuring probes, the temperature measuring probes are provided with third wires, a zero line row is arranged in the shell, the third lead is connected with the zero line bar, the smoke detector is arranged at the top in the shell, the ground line bar is arranged in the shell, an electric meter box fireproof device is also arranged in the shell, a first conducting wire and a second conducting wire are connected outside the electric meter box fireproof device, an indicator light is arranged on the fireproof device of the electric meter, a current transformer is arranged on the first lead, a voltage transformer is arranged on the second lead, the transformer is characterized in that a leading-out end copper bar is connected between the current transformer and the voltage transformer, a lead-in switch is arranged above the voltage transformer and in the shell, and a shunt release is arranged on the lead-in switch.

2. The new fire protection device for an electricity meter box according to claim 1, wherein a wiring slot is provided in the housing, and the third wire is connected to the zero line bank along the wiring slot.

3. The novel electric meter box fireproof device according to claim 1, wherein a sectional type delay alarm device is further arranged on the housing, the alarm threshold value of the sectional type delay alarm device is provided with multiple sections, and the interval time between adjacent alarm threshold values is n, wherein n is more than or equal to 2min and less than or equal to 6 min.

4. The novel electric meter box fireproof device according to claim 3, wherein a short message module and a GPRS module are also required in the housing, and both the short message module and the GPRS module are electrically connected with the sectional type delay alarm device.

5. The novel electric meter box fireproof device according to claim 1, characterized by further comprising a current detection circuit and a temperature detection circuit, wherein the current detection circuit is electrically connected with a current transformer, the current transformer is further provided with a residual current transformer, the residual current transformer is electrically connected with the current detection circuit, and the temperature detection circuit is electrically connected with a temperature probe.

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