Liquid level gauge explosion-proof wireless sound and light alarm device

Abstract

The utility model relates to liquid level instrument alarm equipment technical field discloses a kind of liquid level instrument explosion-proof wireless sound-light alarm device. To solve the technical problem that existing technology cannot be used in dangerous place of explosive gas without reserving cable. The utility model includes sound-light alarm and wireless controller;Sound-light alarm includes explosion-proof distribution box, drive module and battery module are arranged in explosion-proof distribution box, and explosion-proof distribution box side is provided with gran head installation charging plug, antenna and sound-light alarm lamp, charging plug is connected with battery module, and antenna and sound-light alarm lamp are connected with drive module;Wireless controller includes circuit board, and antenna is installed on circuit board, and wiring terminal that can be connected liquid level instrument alarm signal contact is obtained. The utility model is compatible with any brand liquid level instrument, greatly reduce the use cost of customer;With battery power supply, can be installed in the place where explosive dangerous gas exists, avoid wiring construction, installation efficiency is high, and installation cost is low.

Description

Technical Field

[0001] This utility model relates to the technical field of liquid level gauge alarm equipment, and in particular to an explosion-proof wireless audible and visual alarm device for liquid level gauges. Background Technology

[0002] In industrial production, monitoring and alarming of tank liquid levels is a crucial step in ensuring production safety and efficiency. Liquid level alarms, also known as float level switches, water level controllers, or liquid level switches, use mechanical or magnetic induction methods to alarm and check water levels. They can function as audible and visual alarms or magnetic alarms while simultaneously controlling the start or stop of equipment such as water pumps. The methods vary depending on the specific product chosen. Cable-type liquid level alarms work by using a microswitch encapsulated in a sealed plastic casing to detect high and low water levels. When the measured liquid reaches the activation point, it outputs a high or low liquid level signal. When the liquid level drops to a certain level, it outputs a relay switch signal or directly supplies power to the alarm, thus achieving the liquid level alarm function. Float-type liquid level alarms use a float made of plastic or stainless steel. The float, with an internal ring magnet, floats up and down with the water level, attracting a reed switch inside a rod, triggering an alarm signal.

[0003] Chinese patent document 201310700965.7 discloses a liquid level measuring instrument with an alarm function, including an electronic liquid level sensor built into the liquid level measuring instrument. The electronic liquid level sensor is sequentially connected to a storage module, a counting module, a comparison module, a processing module, and an alarm. This solution enables an industrial liquid level gauge to have the function of alarming when the frequency of liquid level fluctuations of the detected object exceeds the safety or set value.

[0004] However, the above solutions have at least the following technical problems during implementation: 1. Existing explosion-proof audible and visual alarm devices do not have wireless control functions and cannot be used in hazardous locations with explosive gases where no cables have been reserved; 2. Existing wireless audible and visual alarms do not have explosion-proof capabilities and cannot be applied in hazardous locations where explosive gases are present. Therefore, there is an urgent need to propose an explosion-proof wireless audible and visual alarm device for liquid level gauges. Summary of the Invention

[0005] In view of the above technical problems, this disclosure provides an explosion-proof wireless audible and visual alarm device for liquid level gauges, which solves the technical problems that existing explosion-proof audible and visual alarm devices do not have wireless control functions and cannot be used in dangerous places with explosive gases where there are no reserved cables; existing wireless audible and visual alarms do not have explosion-proof capabilities and cannot be applied in dangerous places where explosive gases are present.

[0006] According to one aspect of this disclosure, an explosion-proof wireless audible and visual alarm device for a liquid level gauge is provided, comprising an audible and visual alarm and a wireless controller connected wirelessly; the audible and visual alarm includes an explosion-proof distribution box, in which a drive module and a battery module are installed and connected; multiple glands are provided on the side of the explosion-proof distribution box to mount a charging plug, an antenna, and an audible and visual alarm light; the charging plug is connected to the battery module, and the antenna and the audible and visual alarm light are connected to the drive module; the wireless controller includes a circuit board, on which an antenna and wiring terminals for connecting to the alarm signal contacts of the liquid level gauge are mounted.

[0007] In some embodiments of this disclosure, the bottom inner side of the gland is filled with an explosion-proof adhesive plug.

[0008] In some embodiments of this disclosure, the antenna is installed inside the gland head via a potting compound, the potting compound filling the top of the explosion-proof plug, the antenna is connected to the antenna lead wire via a cable introduction component, and the other end of the antenna lead wire is connected to the drive module.

[0009] In some embodiments of this disclosure, the charging plug is installed inside the gland via a potting compound, and a plug is installed at the outer end of the charging plug via a cable entry component.

[0010] In some embodiments of this disclosure, the audible and visual alarm includes a PIC16F688 microcontroller. The control signal output terminal of the PIC16F688 microcontroller is connected to a relay K1 via a transistor Q2 to control the audible and visual alarm.

[0011] In some embodiments of this disclosure, the wireless controller includes a PIC12F683 microcontroller and a linear regulator XC6701D502PR-G; the input terminal of the linear regulator XC6701D502PR-G is connected to a protection diode and a filter capacitor, and the output terminal is connected to a filter capacitor and a transient voltage suppression diode.

[0012] In some embodiments of this disclosure, the power input terminal of the linear regulator XC6701D502PR-G is provided with a power interface J1 to connect to the power supply of the level gauge.

[0013] In some embodiments of this disclosure, the I / O pins of the PIC12F683 microcontroller are connected to optocouplers for electrical isolation of signals.

[0014] The beneficial effects of this utility model are as follows:

[0015] 1. The wireless control module for the alarm signal of the liquid level gauge is compatible with any brand of liquid level gauge (without the need to replace the liquid level gauge and supporting products), which can greatly reduce the customer's usage cost;

[0016] 2. The explosion-proof wireless sound and light alarm device is powered by its own battery and can be installed in places where explosive hazardous gases are present, eliminating the need for wiring construction, resulting in high installation efficiency and low installation cost.

[0017] 3. The self-designed drive module has a static operating current of ≤8mA and a battery capacity of 6000mAh, which can last for 1 month on a single charge, greatly improving ease of use.

[0018] 4. 433MHz fixed frequency transmission, strong anti-interference ability, combined with an external antenna, long transmission distance, high accuracy, and no false alarms.

[0019] 5. An explosion-proof distribution box is used, with explosion-proof plugs filled inside the bottom of the gland. The antenna and charging plug are installed inside the gland using a potting compound, ensuring safety in flammable and explosive environments and effectively preventing accidents caused by electrical sparks or high temperatures. The PIC12F683 microcontroller in the wireless controller is connected to an optocoupler via I / O pins, achieving electrical isolation of the signal and preventing interference from the level gauge alarm signal to the wireless control module, further improving system safety. The XC6701D502PR-G linear regulator in the wireless controller has a protection diode and a filter capacitor connected to its input, and a filter capacitor and a transient voltage suppression diode connected to its output, ensuring power supply stability and reliability and extending the equipment's lifespan. Wireless communication connects the audible and visual alarm and the wireless controller, avoiding the complex wiring problems of traditional wired connections, making installation more flexible and adaptable to various complex industrial environments and layout adjustment needs. The charging plug of the audible and visual alarm is introduced into the component installation plug through a cable, which facilitates charging and maintenance. At the same time, the wiring terminal design of the wireless controller makes it easier to connect to the alarm signal contact of the liquid level gauge, reducing the difficulty of maintenance. Attached Figure Description

[0020] Figure 1 A schematic diagram of the explosion-proof distribution box for the explosion-proof wireless audible and visual alarm device for liquid level gauges;

[0021] Figure 2 A schematic diagram of the wireless controller structure for an explosion-proof wireless audible and visual alarm device for a liquid level gauge.

[0022] Figure 3 Schematic diagram of the explosion-proof wireless audible and visual alarm device for liquid level gauges;

[0023] Figure 4 Schematic diagram of the wireless controller circuit for an explosion-proof wireless audible and visual alarm device for a liquid level gauge.

[0024] The components shown in the diagram are as follows: 1. Explosion-proof distribution box; 2. Gland connector; 3. Explosion-proof plug; 4. Cable entry component; 5. Explosion-proof distribution box antenna; 6. Encapsulation compound; 7. Audible and visual alarm light; 8. Plug; 9. Charging plug; 10. Battery module; 11. Drive module; 12. Antenna lead wire; 13. Circuit board; 14. Wiring terminal; 15. Wireless controller antenna. Detailed Implementation

[0025] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention. Example 1

[0026] This example discloses an explosion-proof wireless audible and visual alarm device for a liquid level gauge. (See also...) Figures 1 to 4 The device includes a wirelessly connected audible and visual alarm and a wireless controller. The audible and visual alarm includes an explosion-proof distribution box 1, which houses a drive module 11 and a battery module 10. Multiple glands 2 are installed on the side of the explosion-proof distribution box 1 to mount a charging plug 9, an explosion-proof distribution box antenna 5, and an audible and visual alarm light 7. The charging plug 9 connects to the battery module 10, and the explosion-proof distribution box antenna 5 and the audible and visual alarm light 7 connect to the drive module 11. The wireless controller includes a circuit board 13, on which a wireless controller antenna 15 and a terminal block 14 for connecting to the alarm signal contacts of a level gauge are mounted.

[0027] The bottom inner side of the gland 2 is filled with explosion-proof glue to stop the plug 3.

[0028] The explosion-proof distribution box antenna 5 is installed inside the gland 2 via a potting compound 6. The potting compound 6 fills the top of the explosion-proof plug 3. The explosion-proof distribution box antenna 5 is connected to the antenna lead wire 12 via the cable entry component 4. The other end of the antenna lead wire 12 is connected to the drive module 11.

[0029] The charging plug 9 is installed inside the gland 2 via the encapsulation compound 6, and the plug 8 is installed on the outer end of the charging plug 9 via the cable introduction component 4.

[0030] The audible and visual alarm includes a PIC16F688 microcontroller. The control signal output of the PIC16F688 microcontroller is connected to a relay K1 via a transistor Q2 to control the audible and visual alarm.

[0031] The wireless controller includes a PIC12F683 microcontroller and a XC6701D502PR-G linear regulator; the XC6701D502PR-G linear regulator has a protection diode and a filter capacitor connected to its input terminal, and a filter capacitor and a transient voltage suppression diode connected to its output terminal.

[0032] The power input terminal of the linear regulator XC6701D502PR-G is equipped with a power interface J1 to connect to the power supply of the level gauge.

[0033] The I / O pins of the PIC12F683 microcontroller are connected to optocouplers for electrical isolation of signals.

[0034] During operation, when the liquid level, temperature, and other parameters in the storage tank are within the normal range, the level gauge alarm signal relay contacts remain normally open. The wireless control module does not transmit control commands, and the explosion-proof wireless audible and visual alarm device is in standby mode. When an abnormality occurs in the liquid within the tank (such as excessively high liquid level or abnormal temperature), the level gauge alarm signal relay contacts close, driving the audible and visual alarm lights to emit sound and light alarm signals. The alarm signal will continue to be emitted until the abnormality in the tank is resolved, or until the alarm is stopped by a manual reset. The battery module of the explosion-proof wireless audible and visual alarm device is charged via a charging plug, which is installed inside the gland using a potting compound to ensure explosion-proof performance. The power input terminal of the wireless controller is connected to the level gauge power supply via power interface J1 to power the wireless control module. A linear regulator XC6701D502PR-G regulates the power supply voltage, and together with protection diodes, filter capacitors, and transient voltage suppression diodes, ensures the stability and reliability of the power supply. The PIC12F683 microcontroller in the wireless controller is connected to an optocoupler via I / O pins to achieve electrical isolation of the signal and prevent the level gauge alarm signal from interfering with the wireless control module.

[0035] This invention comprises two parts: an explosion-proof wireless audible and visual alarm device and a liquid level gauge alarm signal wireless control module.

[0036] The wireless control module consists of a microcontroller U2, an optocoupler U3, a 433 module interface J3, a power chip U1, and its peripheral circuitry. In use, J1 is connected to the external power supply of the level gauge to power the module; J4 is connected to the level gauge alarm relay to acquire control signals; and the 433 module in J3 enables wireless communication, transmitting the control signals to the explosion-proof wireless audible and visual alarm device to trigger an alarm.

[0037] This design does not use serial ports or network communication, is unaffected by communication protocols, and is independent of the brand of the level gauge. Customers using this design can avoid replacing existing equipment, saving costs.

[0038] The explosion-proof wireless audible and visual alarm device consists of an explosion-proof box, a drive module, a battery module, and other assembly components.

[0039] The alarm signal relay contact of the level gauge is connected to the terminal block of the wireless control module. When there are no abnormalities in the liquid level, temperature, etc. in the storage tank, the alarm signal relay contact remains open, the wireless control module does not transmit control commands, and the explosion-proof wireless audible and visual alarm device is in standby mode. When an abnormality occurs in the liquid in the storage tank, the alarm signal relay contact closes, the wireless control module transmits control commands, and the drive module installed in the explosion-proof wireless audible and visual alarm device receives the commands and drives the audible and visual alarm lights to work, emitting sound and light until the abnormality is cleared or manually reset, at which point the alarm stops.

[0040] It adopts a fixed frequency of 433MHz for transmission, which has strong anti-interference ability. With an external antenna, it can achieve long-distance transmission (transmission distance of 100 meters+) and precise operation.

[0041] The core component of this invention is the driver module, which is independently designed and mainly consists of three parts: a U2 ultra-low power microcontroller circuit (supporting sleep and low wake-up current), a 433 wireless module circuit J3 (connected to a 433 low power transparent transmission module), and a K1 relay output module.

[0042] The 433 module is powered by a microcontroller. In standby mode, the 433 module retains only the most basic functions to reduce power consumption.

[0043] Although some preferred embodiments of the present invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the present invention.

[0044] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this application and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A liquid level gauge explosion-proof wireless audible and visual alarm device, characterized in that: The system includes a wirelessly connected audible and visual alarm and a wireless controller. The audible and visual alarm includes an explosion-proof distribution box, inside which a drive module and a battery module are connected. Multiple glands are mounted on the side of the explosion-proof distribution box to install a charging plug, an antenna, and an audible and visual alarm light. The charging plug is connected to the battery module, and the antenna and the audible and visual alarm light are connected to the drive module. The wireless controller includes a circuit board, on which an antenna and terminals for connecting to the alarm signal contacts of a level gauge are mounted.

2. The explosion-proof wireless audible and visual alarm device for liquid level gauges as described in claim 1, characterized in that: The bottom inner side of the gland is filled with explosion-proof glue plug.

3. The explosion-proof wireless audible and visual alarm device for liquid level gauges as described in claim 1, characterized in that: The antenna is installed inside the gland head via a potting compound, which fills the top of the explosion-proof plug. The antenna is connected to the antenna lead wire via a cable entry component, and the other end of the antenna lead wire is connected to the drive module.

4. The explosion-proof wireless audible and visual alarm device for liquid level gauges as described in claim 1, characterized in that: The charging plug is installed inside the gland head via a potting compound, and the outer end of the charging plug is fitted with a plug via a cable entry component.

5. The explosion-proof wireless audible and visual alarm device for liquid level gauges as described in claim 1, characterized in that: The audible and visual alarm includes a PIC16F688 microcontroller. The control signal output terminal of the PIC16F688 microcontroller is connected to a relay K1 via a transistor Q2 to control the audible and visual alarm.

6. The explosion-proof wireless audible and visual alarm device for liquid level gauges as described in claim 1, characterized in that: The wireless controller includes a PIC12F683 microcontroller and a XC6701D502PR-G linear regulator; the input terminal of the XC6701D502PR-G is connected to a protection diode and a filter capacitor, and the output terminal is connected to a filter capacitor and a transient voltage suppression diode.

7. The explosion-proof wireless audible and visual alarm device for liquid level gauges as described in claim 6, characterized in that: The linear voltage regulator XC6701D502PR-G has a power input terminal with a power interface J1 for connecting to the power supply of the level gauge.

8. The explosion-proof wireless audible and visual alarm device for liquid level gauges as described in claim 6, characterized in that: The I / O pins of the PIC12F683 microcontroller are connected to an optocoupler for electrical isolation of signals.

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