Water inlet detection device for junction box

Abstract

The invention discloses a junction box water inflow detection device, and belongs to the technical field of chemical engineering electrical safety, the junction box water inflow detection device comprises a junction box and a detection device connected with the junction box, the detection device comprises a shell, an electrical path logic judgment module is arranged in the shell, and the detection device further comprises a power supply module; one path of positive and negative electrodes of the power supply module are connected with the electrical path logic judgment module through power lines, the electrical path logic judgment module is provided with a signal receiving antenna and a signal transmitting antenna, the other path of positive and negative electrodes of the power supply module are connected with an electrochromic film through power lines, and one end of the electrochromic film is placed in a groove of the junction box. According to the invention, through the detection device, different prompts are provided for workers in different states of no water inflow, small water inflow and large water inflow of the junction box, so that the workers can carry out different maintenance on the junction box.

Description

Technical Field

[0001] The invention relates to the technical field of chemical electrical safety, and in particular to a water ingress detection device for a junction box. Background Art

[0002] With the continuous development and expansion of the industrial field, the role of electrical systems in industrial production has become increasingly critical. The industrial environment is complex and diverse, covering many scenarios such as factory workshops, mines, construction sites, and petrochemicals. In these environments, electrical equipment needs to operate stably and reliably to ensure the continuity and safety of production. In modern industrial production, a large number of electrical equipment are distributed in every corner, from large mechanical equipment to small sensors and controllers, all of which are inseparable from electrical connections. As an important part of electrical connections, the junction box plays a role in protecting and organizing wire connections. However, the industrial environment is often full of various challenges, among which humidity, moisture, dust, chemicals, etc. are the main threats to electrical equipment. In many industrial scenarios, such as damp basements, outdoor construction sites, and rainy mines, electrical equipment is easily invaded by moisture. Once moisture enters the junction box, it may cause serious consequences such as short circuits, equipment damage, and even fires, bringing huge safety hazards and economic losses to industrial production. In order to avoid the safety hazards caused by water ingress to the junction box, the existing technology can only rely on workers to conduct regular inspections of the junction box, but the worker inspection is very cumbersome, and once a problem occurs during the non-inspection period, it is difficult to solve the hidden danger in time. Summary of the invention

[0003] In order to solve the technical problems mentioned in the above background technology, the present invention provides a device for detecting water ingress in a junction box, and the technical solution adopted is as follows:

[0004] The invention comprises a junction box and a detection device connected to the junction box, wherein the detection device comprises a shell, an electric path logic judgment module is arranged in the shell, and a power supply module is also arranged, wherein the positive and negative poles of the power supply module are connected to the electric path logic judgment module through a power line, a signal receiving antenna and a signal transmitting antenna are arranged on the electric path logic judgment module, an electrovariable film is connected to the other positive and negative poles of the power supply module through a power line, one end of the electrovariable film is placed in a groove of the junction box, the signal receiving antenna is connected to the electrovariable film, and an alarm is arranged on the signal transmitting antenna.

[0005] Furthermore, the shell has good waterproof performance, and different shell materials can be selected according to different application scenarios.

[0006] Furthermore, the power module adopts a high-density battery, and the power module is powered by two routes, one route is for the electrotropic film, and the other route is for the electric path logic judgment module.

[0007] Furthermore, both the signal receiving antenna and the signal transmitting antenna are equipped with millimeter wave sensors. When working continuously, the average current is only 0.1 mA, and the power consumption is extremely low. The signal transmitting antenna has a narrow beam, high resolution, wide bandwidth, and strong anti-interference ability.

[0008] Furthermore, the signal transmitting antenna has the function of sending signals to a host computer, and can realize wireless remote transmission by relying on electronic beacons.

[0009] Furthermore, the electrotropic film uses a polythiophene film, the main chain of which will twist and the conjugated structure will be destroyed when the electric potential changes, resulting in a rapid color change.

[0010] Furthermore, the electrochromic film is in a non-powered state under normal conditions, the electric potential energy does not act on the polythiophene film, and the original color does not change. When water or water vapor in the junction box adheres to the electrochromic film to form a pathway, the film changes color due to the electric potential.

[0011] Furthermore, one of the core functions of the electrical path logic judgment module is to accurately determine whether a large amount of water has entered the junction box. By monitoring and logically analyzing the electrical path status of the relevant circuits in the junction box, it can identify the changes in circuit parameters caused by water ingress, and then determine the amount of water intruding into the junction box.

[0012] Furthermore, one of the core functions of the electrical path logic judgment module is to accurately determine whether a large amount of water has entered the junction box. By monitoring and logically analyzing the electrical path status of the relevant circuits in the junction box, it can identify the changes in circuit parameters caused by water ingress, and then determine the amount of water intruding into the junction box.

[0013] The present invention has the following advantages: by placing one end of the electrovariable film in the groove of the junction box, the other end of the electrovariable film is connected to the power module through the power line, the power module is connected to the electric path logic judgment module through the power line, and a signal receiving antenna is connected between the electric path logic judgment module and the electrovariable film. When no water vapor enters the junction box, the electrovariable film does not change color. When water enters the junction box, the water contacts one end of the electrovariable film in the junction box, and the electrovariable film forms an electric path through the power line and the power module. The electrovariable film is energized to change its color. However, since the current on the electrovariable film is extremely small, the signal receiving antenna cannot sense the current flowing on the electrovariable film, indicating that very little water has entered the junction box. The inspection personnel can detect the electrovariable film based on the electrovariable film. When the color of the electrovariable film changes, the junction box is opened and the junction box is maintained when the junction box is in working condition. If the signal receiving antenna senses the current flowing on the electrovariable film, the current induced by the signal receiving antenna is detected by the electrical path logic judgment module, and the electrical path logic judgment module makes a judgment and controls the signal transmitting antenna to transmit a signal to the alarm, so that the alarm sounds and notifies the inspection personnel, indicating that there is a lot of water in the junction box, water accumulates in the groove of the junction box and contacts one end of the electrovariable film. At this time, the worker must cut off the working power of the junction box before the junction box can be maintained. The present invention uses a detection device to give different prompts to the workers when the junction box is in different states of no water ingress, a small amount of water ingress and a large amount of water ingress, so that the inspection personnel can perform different maintenance on the junction box. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic structural diagram of the present invention;

[0015] Figure 2 It is a schematic diagram of the present invention.

[0016] Figure: 1 junction box, 2 housing, 3 electrical path logic judgment module, 4 power supply module, 5 signal receiving antenna, 6 signal transmitting antenna, 7 electrovariable film, 8 groove, 9 alarm. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] Please refer to Figure 1-2The present invention discloses a water ingress detection device for a junction box, comprising a junction box 1 and a detection device connected to the junction box 1, wherein the detection device comprises a shell 2, the shell 2 has good waterproof performance, and shell materials of different materials can be selected according to different application scenarios, and an electric path logic judgment module 3 is arranged in the shell 2. The electric path logic judgment module 3 adopts an open source electronic prototype platform as a core component of the electric path logic judgment module 3 of the water ingress detection device, which can reduce development difficulty and improve development efficiency while ensuring function realization, and has good scalability and flexibility.

[0019] It also includes a power module 4, which uses a high-density battery. The power module 4 is powered in two ways, one is the electrovariable film 7, and the other is the electrical path logic judgment module 3. The positive and negative poles of one way of the power module 4 are connected to the electrical path logic judgment module 3 through a power line, and the electrical path logic judgment module 3 is provided with a signal receiving antenna 5 and a signal transmitting antenna 6. The positive and negative poles of the other way of the power module 4 are connected to the electrovariable film 7 through the power line. One end of the electrovariable film 7 is placed in the groove 8 of the junction box 1, the signal receiving antenna 5 is connected to the electrovariable film 7, and the signal transmitting antenna 6 is provided with an alarm 9.

[0020] The signal receiving antenna 5 and the signal transmitting antenna 6 are both equipped with millimeter wave sensors. When working continuously, the average current is only 0.1 mA, and the power consumption is extremely low. The signal transmitting antenna 6 has a narrow beam, high resolution, wide bandwidth, and strong anti-interference ability.

[0021] The signal transmitting antenna 6 can rely on electronic beacons to achieve wireless remote transmission. Since the junction box 1 is in a long-term working state and is usually powered by a battery or a limited power supply, the signal receiving antenna 5 and the signal transmitting antenna 6 need to have the characteristics of low power consumption, which can extend the service life of the device and reduce energy consumption and maintenance costs. Since the application scenarios of the present invention do not have high requirements for real-time performance, different transmission frequencies can be selected according to different locations to further reduce power consumption.

[0022] After the signal transmitting antenna 6 sends out the signal containing the water ingress location, severity and other information, the host computer receives and processes the information. The host computer can be a computer, mobile phone or other device in the monitoring center, which analyzes and displays the received signal through special software or application.

[0023] The electrotropic film 7 uses a polythiophene film, the main chain of which will be twisted when the electric potential changes, and the conjugated structure will be destroyed, resulting in a rapid color change.

[0024] The electrotropic film 7 is in a non-powered state under normal conditions, and the electric potential energy does not act on the polythiophene film, and the original color will not change. When there is water or water vapor in the junction box 1 and adheres to the electrotropic film 7, a path is formed. At this time, the film changes color due to the electric potential. The electrotropic film 7 extends from the junction box 1 to the outside of the junction box 1. If color change occurs, the inspectors can judge from the color change that the equipment is currently in an initial water inflow state and needs to be paid attention to and repaired in the near future. If a large amount of water accumulates in the junction box 1 due to heavy rain or other reasons, the accumulated water causes the electric potential to increase, triggering the emergency electronic alarm function of the equipment. After being processed by the electrical path logic judgment module 3, a signal is sent out to actively inform the maintenance personnel to carry out emergency repairs.

[0025] By monitoring and performing logical analysis on the electrical path status of the relevant circuits in the junction box 1, it is possible to identify changes in circuit parameters caused by water ingress, and then determine the amount of water intruding into the junction box 1. It can also distinguish between faults caused by water ingress and other types of faults. In a complex electrical system, the junction box 1 may have a variety of fault causes, such as component aging, short circuit, etc. The electrical path logic judgment module 3 can identify the faults caused by water ingress separately based on the specific electrical path logic relationship, so as to issue accurate early warning signals in a timely manner.

[0026] Working principle of the present invention:

[0027] Under normal circumstances, the device is in standby mode, and the working status of each component is as follows:

[0028] The power module 4 operates in a low power consumption state, providing basic power support for the electric path logic judgment module 3, so that the electric path logic judgment module 3 is always in a working state. It is worth pointing out that the power module 4 provides a separate circuit for the electrovariable film 7 and the electric path logic judgment module 3, rather than connecting them in series, because even if the electrovariable film 7 is in contact with water and has current flowing through it, it cannot independently drive the electric path logic judgment module 3 to work. Therefore, the power module 4 is connected to the electric path logic judgment module 3 through a power line alone to keep it working.

[0029] When no water vapor enters the junction box 1 , the electrotropic film 7 does not change color.

[0030] When a small amount of water vapor appears in the junction box 1, the device enters the detection mode and triggers the second level alarm:

[0031] When a small amount of water vapor enters the junction box 1, the water vapor contacts one end of the electrovariable film 7 in the junction box 1, and the electrovariable film 7 forms an electrical path through the power line and the power module 4. The electrovariable film 7 is energized to change its color. However, since the current on the electrovariable film 7 is extremely small, the signal receiving antenna 5 cannot sense the current flowing on the electrovariable film 7, and the alarm 9 does not sound an alarm. The inspection personnel open the junction box 1 according to the color change of the electrovariable film and maintain the junction box 1 when the junction box 1 is in working condition.

[0032] When a large amount of water enters, water accumulates in the groove 8 of the junction box 1, and the accumulated water contacts one end of the electrovariable film 7. When the power module 4 forms a path with the electrovariable film 7 through the wire, the current on the electrovariable film 7 becomes larger, and the signal receiving antenna 5 senses the current on the electrovariable film 7 and the signal is detected by the electrical path logic judgment module 3. The electrical path logic judgment module 3 makes a judgment and controls the signal transmitting antenna 6 to transmit a signal to the alarm 9, so that the alarm 9 alarms. This is a first-level warning, which notifies the inspection personnel that a lot of water has entered the junction box 1. At this time, the workers must cut off the working power of the junction box 1 itself before they can maintain and repair the junction box 1.

[0033] The present invention is simple to operate, convenient to use, and suitable for comprehensive promotion and application. Although the embodiments of the present invention have been shown and described, it is understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A water ingress detection device for a junction box, comprising a junction box (1) and a detection device connected to the junction box (1), characterized in that: The detection device comprises a housing (2), an electric path logic judgment module (3) is arranged in the housing (2), and also comprises a power supply module (4), a positive and negative pole of the power supply module (4) is connected to the electric path logic judgment module (3) through a power line, a signal receiving antenna (5) and a signal transmitting antenna (6) are arranged on the electric path logic judgment module (3), the positive and negative poles of the other side of the power supply module (4) are connected to an electrovariable film (7) through the power line, one end of the electrovariable film (7) is placed in a groove (8) of a junction box (1), the signal receiving antenna (5) is connected to the electrovariable film (7), and an alarm (9) is arranged on the signal transmitting antenna (6).

2. A water ingress detection device for a junction box according to claim 1, characterized in that: The outer shell (2) has good waterproof performance, and different materials of the outer shell can be selected according to different application scenarios.

3. A water ingress detection device for a junction box according to claim 1, characterized in that: The power module (4) uses a high-density battery. The power module (4) is divided into two power supply paths, one path is for the electrotropic film (7), and the other path is for the electrical path logic judgment module (3).

4. A water ingress detection device for a junction box according to claim 1, characterized in that: The signal receiving antenna (5) and the signal transmitting antenna (6) are both equipped with millimeter wave sensors. When working continuously, the average current is only 0.1 mA, and the power consumption is extremely low. The signal transmitting antenna (6) has a narrow beam, high resolution, wide frequency band, and strong anti-interference ability.

5. A water ingress detection device for a junction box according to claim 4, characterized in that: The signal transmitting antenna (6) can realize wireless remote transmission by relying on the electronic beacon.

6. A water ingress detection device for a junction box according to claim 1, characterized in that: The electrovariable film (7) uses a polythiophene film. When the electric potential changes, the main chain of the material will be twisted and the conjugated structure will be destroyed, resulting in a rapid color change.

7. A water ingress detection device for a junction box according to claim 6, characterized in that: The electrotropic film (7) is in a non-powered state under normal conditions, the electric potential energy does not act on the polythiophene film, and the original color does not change. When water or water vapor in the junction box (1) adheres to the electrotropic film (7) to form a path, the electrotropic film (7) changes color due to the electric potential.

8. A water ingress detection device for a junction box according to claim 1, characterized in that: One of the core functions of the electrical path logic judgment module (3) is to accurately judge whether a large amount of water has entered the junction box (1). By monitoring and performing logic analysis on the electrical path status of the relevant circuits in the junction box (1), it is possible to identify changes in circuit parameters caused by water ingress, and further determine the amount of water intruding into the junction box (1).

9. A water ingress detection device for a junction box according to claim 8, characterized in that: The electrical path logic judgment module (3) adopts an open source electronic prototype platform as the core component of the electrical path logic judgment module (3) of the water inlet detection device, which can reduce the development difficulty and improve the development efficiency while ensuring the function is realized, and has good scalability and flexibility.

Images