CN207134693U - A kind of cable branch box, ring main unit automatic dehumidification device - Google Patents

Abstract

An automatic dehumidification device for a cable branch box and a ring network cabinet, which includes a box body on which a solar device is provided, the solar device includes a photovoltaic panel, and a temperature and humidity sensor device and a storage battery device are arranged on the box body. The sensor device is connected with the ventilation fan, and the battery device is connected with the temperature and humidity sensor device and the power supply end of the ventilation fan. The utility model can solve the technical problem that the humidity in the existing cable branch box and the ring network cabinet is relatively high, which easily affects the normal operation of the internal electric equipment.

Description

Automatic dehumidification device for cable branch box and ring network cabinet

technical field

The utility model belongs to the field of power distribution equipment, in particular to an automatic dehumidification device for a cable branch box and a ring network cabinet.

Background technique

At present, the settlement of urban cable trenches is lower than that of sewers, and rainwater or sewage is easy to accumulate. Due to manufacturing reasons or construction blocking reasons, the cable branch box, ring network cabinet box or the bottom of the switch interval cannot 100% guarantee the isolation of cable trenches and boxes. The purpose of the small-area louvers of the original cabinet is to ventilate and dissipate heat. Due to the lax sealing between the cabinet and the cable trench, it is easy to form a chimney effect, and a large amount of hot and humid saturated air will condense and drip on the equipment cabinet when it is cold. It will cause hidden dangers to the switching operation and normal operation of the equipment. According to State Grid Corporation's enterprise standard Q/GDW519-2010 "Distribution Network Operating Regulations" on page 9 "5.8 Inspection of switch cabinets and ring network cabinets: f) Whether there is condensation on the equipment, whether the heater or dehumidification device is in good condition" ;According to the enterprise standard Q/GDW645-2011 "Guidelines for State Evaluation of Power Distribution Equipment" of the State Grid Corporation of China, the maximum deduction value for P1 condensation of the cable branch box body can reach 30 points; the shell of the ring network unit is treated as <structure and shell> Condition evaluation, including the main body, foundation, grounding system, passage, auxiliary facilities and other components, among which auxiliary facilities P5 include strong exhaust devices, dehumidification devices, etc., according to the "Guidelines for Status Evaluation of Power Distribution Equipment", the maximum deduction of 30 points and 10 points can be deducted respectively. point. 30 points will be deducted if the equipment is in an <abnormal state>, according to the enterprise standard Q/GDW644-2011 "Guidelines for Condition Maintenance of Power Distribution Equipment" of the State Grid Corporation of China "the power outage maintenance of abnormal state equipment will be arranged in time according to the specific situation". However, it is difficult to achieve "timely arrangement" under actual operating conditions, which violates the principle of condition-based maintenance and also lays hidden dangers for the safe operation of equipment.

Contents of the invention

The purpose of this utility model is to provide an automatic dehumidification device for cable branch boxes and ring network cabinets, which can solve the technical problem that the existing cable branch boxes and ring network cabinets have relatively high humidity and easily affect the normal operation of internal power equipment.

In order to realize above-mentioned technical characterictic, the technical scheme that the utility model adopts is:

An automatic dehumidification device for a cable branch box and a ring network cabinet, which includes a box body on which a solar device is provided, the solar device includes a photovoltaic panel, and a temperature and humidity sensor device and a storage battery device are arranged on the box body. The sensor device is connected with the ventilation fan, and the battery device is connected with the temperature and humidity sensor device and the power supply end of the ventilation fan.

The above-mentioned ventilating fan includes an intake fan and an exhaust fan, and the intake fan and the exhaust fan form a double-fan ventilation structure.

The power supply end of the solar device is connected to the input end of the constant voltage and current limiting charger, and the output end of the constant voltage and current limiting charger is connected to the power supply end of the battery device.

The storage battery device described above includes a lead-acid storage battery.

The above-mentioned constant-voltage and current-limiting charger includes a wide-width DC voltage stabilizing circuit.

Tempered glass is provided above the photovoltaic panels.

A PLC controller is arranged on the box body, and the data ports of the PLC controller are respectively connected with temperature and humidity sensor devices and a ventilation fan.

The above-mentioned PLC controller is a modular expandable structure.

The above-mentioned PLC controller includes at least one RS485 communication interface and a 4G wireless communication module.

Adopt above-mentioned structure, the utility model has following technical effect:

The utility model uses solar photovoltaic cells to generate electricity, lead-acid batteries to store electricity, adopts a constant voltage and current limiting method to automatically charge and store energy, and drives a DC fan to ventilate (one in and one out). In addition, it adopts an industrial-grade PLC controller, Multiple sensors can be connected externally. According to the temperature and humidity, automatic or manual operation, the device is safe and reliable, and does not affect the normal operation of the cable branch box and the ring network cabinet; it can connect a cable branch box and ring network cabinet with water accumulation and condensation The daily average relative humidity of the cabinet is controlled within 90%, and the monthly average relative humidity is controlled within 85%.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the utility model is further described.

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

Fig. 2 and Fig. 3 are circuit diagrams of the present utility model.

Detailed ways

As shown in Fig. 1 and Fig. 2, a kind of cable branch box, ring main unit automatic dehumidification device, it comprises box body 1, is provided with solar energy device on box body 1, and solar energy device includes photovoltaic panel 2, is installed on box body 1 There are temperature and humidity sensor device 4 and storage battery device 6, temperature and humidity sensor device 4 is connected with ventilation fan 5, storage battery device 6 is connected with XH-T106 thermistor temperature sensor, DHT11 temperature and humidity sensor device 4 and the power supply end of ventilation fan 5.

The ventilation fan 5 includes an intake fan 7 and an exhaust fan 8, and the intake fan 7 and the exhaust fan 8 form a double fan ventilation structure.

The power supply terminal of the solar device is connected to the input terminal of the constant voltage and current limiting charger, and the output terminal of the constant voltage and current limiting charger is connected to the power supply terminal of the battery device 6 .

The battery device includes a lead-acid battery.

The constant-voltage and current-limiting charger includes a wide-width DC voltage stabilizing circuit.

Tempered glass 3 is arranged above the photovoltaic panel 2 .

A PLCS7-200 CPU224XP controller is provided on the box body 1, and the data port of the PLC controller is respectively connected with the temperature and humidity sensor device 4 and the ventilation fan 5.

The PLC controller is a modular expandable structure.

The PLC controller includes at least one RS485 communication interface and a 4G wireless communication module.

Specifically, the parameters and selection of solar photovoltaic cells: solar photovoltaic cells are installed on the top of the branch box, the actual installation area is about 2 square meters, the output power is 300 watts under the rated illumination, and the manufacturer supports tempered glass protection.

Parameters and selection of lead-acid battery: DC 24V voltage level is adopted, the capacity is 120Ah, and it can work continuously for about 60 hours after being fully charged.

Constant voltage and current limiting charger parameters and selection: The input adopts a wide-width DC voltage stabilization circuit structure. First, the output of the solar battery is stabilized, and after the voltage is stabilized, the lead-acid battery is charged through the charging circuit. The charging method is a constant voltage and current limiting charging method, and the lead-acid battery will automatically transfer to the floating charging state after it is fully charged. The constant current charging current and float charging voltage are selected according to the parameters recommended by the battery manufacturer.

DC fan parameters and selection: DC working voltage 24V, current 0.8A, air volume 5.5 cubic meters per minute, fan diameter 200mm, noise 55dB, adopts double fan ventilation mode of air inlet and air outlet.

Parameters and selection of industrial-grade PLC controller: DC operating voltage 20.4V-28.8V, the controller structure is modular and expandable, and the digital module and analog module can be expanded as needed. The controller is equipped with 2 RS485 communication interfaces and supports the international standard MODBUS protocol. It can communicate with any third-party equipment with public communication protocols. For example, this solution can be extended to sulfur hexafluoride leakage, methane, carbon monoxide and other harmful gas detection, discharge detection, smoke detection and real-time transmission alarm through 4G wireless module, or electronic Emails, mobile phone text messages, etc. are sent to the dispatch center, monitoring center, equipment management personnel, etc. With the construction of the smart grid, information such as switch status and action characteristics, load detection, and energy measurement can also be transmitted in real time. The input and output signals are photoelectrically isolated, and the communication interface is designed for lightning protection, which is resistant to 2000V voltage shock. Three-proof treatment, in line with industrial environment requirements. The system reserves analog and digital interfaces for easy expansion.

Temperature and humidity sensor parameters and selection: DC working voltage 20.4V-28.8V, signal output 0-10V. .

With the above structure, when in use, the utility model uses solar photovoltaic cells to generate electricity, lead-acid batteries to store electricity, adopts constant voltage and current limiting mode to automatically charge and store energy, and drives a DC fan to ventilate (one in and one out). In addition, It adopts industrial-grade PLC controller, which can be connected with multi-channel sensors. According to the temperature and humidity, it can be operated automatically or manually. This device is safe and reliable, and does not affect the normal operation of cable branch boxes and ring network cabinets; The daily average relative humidity of the cable branch box and ring network cabinet is controlled within 90%, and the monthly average relative humidity is controlled within 85%.

Claims (9)

1. An automatic dehumidification device for a cable branch box and a ring network cabinet, characterized in that it includes a box body (1), and a solar device is provided on the box body (1), and the solar device includes a photovoltaic panel (2). (1) is equipped with a temperature and humidity sensor device (4) and a battery device (6), the temperature and humidity sensor device (4) is connected to the ventilation fan (5), the battery device (6) is connected to the thermistor temperature sensor, The sensor device (4) and the power supply end of the ventilation fan (5) are connected. 2. An automatic dehumidification device for a cable branch box and a ring network cabinet according to claim 1, characterized in that: the ventilation fan (5) includes an intake fan (7) and an exhaust fan (8), and the intake fan (7) and the exhaust fan (8) form a double fan ventilation structure. 3. An automatic dehumidification device for a cable branch box and a ring network cabinet according to claim 1, characterized in that: the power supply end of the solar device is connected to the input end of the constant voltage and current limiting charger, and the constant voltage and current limiting charging The output end of the device is connected with the power supply end of the storage battery device (6). 4. An automatic dehumidification device for a cable branch box and a ring main unit according to claim 3, wherein the battery device includes a lead-acid battery. 5. An automatic dehumidification device for a cable branch box and a ring network cabinet according to claim 3, wherein the constant-voltage and current-limiting charger includes a wide-width DC voltage stabilizing circuit. 6. The automatic dehumidification device for cable branch box and ring network cabinet according to claim 1, characterized in that: tempered glass (3) is arranged above the photovoltaic panel (2). 7. The automatic dehumidification device for a cable branch box and a ring network cabinet according to claim 1, characterized in that: a PLC controller is provided on the box body (1), and the data port of the PLC controller is connected with temperature and humidity respectively. The sensor device (4) and the ventilation fan (5) are connected. 8. An automatic dehumidification device for a cable branch box and a ring network cabinet according to claim 7, wherein the PLC controller is a modular expandable structure. 9. An automatic dehumidification device for a cable branch box and a ring network cabinet according to claim 7 or 8, wherein the PLC controller includes at least one RS485 communication interface and a 4G wireless communication module.