Safety alarm device for cable tunnel

Abstract

The utility model relates to a safety alarm device for a cable tunnel, which belongs to the technical field of cable tunnel safety monitoring and comprises a harmful gas detection module, a main control module and an alarm module. The harmful gas detection module is used for detecting the concentration of harmful gas; the main control module is respectively connected with the harmful gas detection module and the alarm module; the main control module is connected with the harmful gas detection module and is used for monitoring the concentration of the harmful gas detected by the harmful gas detection module; the master control module is connected with the alarm module and used for controlling the alarm module to give an alarm. The harmful gas detection module monitors the concentration of harmful gas in real time and sends the concentration to the main control module, the main control module judges whether the alarm module needs to be controlled to give an alarm or not according to a preset threshold value, and when the concentration of the harmful gas exceeds a safety range, the main control module triggers the alarm module to give an alarm.

Description

Technical Field

[0001] The utility model relates to the technical field of cable tunnel safety monitoring, in particular to a safety alarm device for a cable tunnel. Background Art

[0002] With the acceleration of urban construction, in order to beautify the city, more and more cables are used in power grid transformation, gradually replacing overhead lines. Cable lines are buried underground, which leads to many factors causing cable failures. It is difficult to accurately locate the fault type and fault point, so many cable tunnels have emerged.

[0003] A cable tunnel is a corridor or tunnel-like structure used to accommodate a large number of cables laid on cable supports. In addition to providing better protection for the cables, cable tunnels also make it easier for people to inspect and repair the cables.

[0004] However, the space in the cable tunnel is relatively closed and is prone to producing harmful gases. When workers enter the cable tunnel for inspection without knowing the gas environment inside the cable tunnel, they are prone to inhaling harmful gases and causing danger.

[0005] To this end, the utility model provides a safety alarm device for a cable tunnel to solve the above technical problems. Utility Model Content

[0006] The utility model provides a safety alarm device for a cable tunnel, the safety alarm device comprising a harmful gas detection module, a main control module and an alarm module;

[0007] The harmful gas detection module is used to detect the concentration of harmful gases;

[0008] The main control module is connected to the harmful gas detection module and the alarm module respectively;

[0009] The main control module is connected to the harmful gas detection module and is used to monitor the concentration of the harmful gas detected by the harmful gas detection module;

[0010] The main control module is connected to the alarm module and is used to control the alarm module to alarm when the concentration of harmful gases detected exceeds a preset threshold.

[0011] Furthermore, the harmful gas detection module includes a harmful gas sensor G;

[0012] The ground terminal of the harmful gas sensor G is grounded, the signal output terminal of the harmful gas sensor G is connected to the first end of the first resistor R1, the second end of the first resistor R1 is connected to the first end of the second resistor R2, and the second end of the second resistor R2 is connected to the power supply VCC1;

[0013] The second end of the first resistor R1 and the first end of the second resistor R2 are connected to a first lead P1 , and the first resistor R1 and the second resistor R2 are connected to the main control module through the free end of the first lead P1 .

[0014] Furthermore, the harmful gas sensor G is a carbon monoxide sensor or a methane sensor.

[0015] Furthermore, the alarm module includes a third resistor R3 and an alarm BL;

[0016] The first end of the alarm BL is grounded, the second end of the alarm BL is connected to the first end of the third resistor R3, the second end of the third resistor R3 is connected to the second lead P2, and the third resistor R3 is connected to the main control module through the free end of the second lead P2.

[0017] Furthermore, the safety alarm device further includes a wireless communication module;

[0018] The wireless communication module includes an antenna ANT, a fourth resistor R4, a first capacitor C1, a second capacitor C2 and a first inductor L1;

[0019] A first end of the fourth resistor R4 is connected to the antenna ANT and the first end of the second capacitor C2 , and a second end of the fourth resistor R4 is connected to the first end of the first capacitor C1 and the first end of the first inductor L1 ;

[0020] The second end of the second capacitor C2 is connected to the second end of the first capacitor C1, and the second end of the second capacitor C2 and the second end of the first capacitor C1 are both grounded;

[0021] The second end of the first inductor L1 is connected to the third lead P3, the second end of the first capacitor C1 is connected to the fourth lead P4, the first inductor L1 is connected to the main control module through the free end of the third lead P3, and the first capacitor C1 is connected to the main control module through the free end of the fourth lead P4.

[0022] Furthermore, the safety alarm device further includes a power supply module;

[0023] The power supply module is connected to the main control module.

[0024] The beneficial effects of the present invention are as follows: multiple safety alarm devices are installed in the cable tunnel, and the harmful gas detection modules of the multiple safety alarm devices are distributed in different positions in the cable tunnel. The harmful gas detection modules monitor the concentration of harmful gases in real time and send the detected concentration data of harmful gases to the main control module. The main control module determines whether it is necessary to control the alarm module in the monitoring center to alarm according to the preset threshold value. When the concentration of harmful gases exceeds the safe range, the main control module will trigger the alarm module to sound an alarm. In this way, when harmful gases exist in the cable tunnel, the safety alarm device can detect and sound an alarm in time. The staff of the monitoring center will hear the alarm sound and will no longer rashly enter the cable tunnel, thereby ensuring the safety of personnel.

[0025] These and other purposes, features and advantages of the present invention are fully reflected in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 The electrical principle block diagram of the safety alarm device for cable tunnels of the present invention is shown.

[0027] Figure 2 The circuit principle diagram of the harmful gas detection module of the safety alarm device for cable tunnels of the present invention is shown.

[0028] Figure 3 The utility model shows a circuit principle diagram of the alarm module of the safety alarm device for cable tunnels.

[0029] Figure 4 The circuit principle diagram of the wireless communication module of the safety alarm device for cable tunnels of the present invention is shown. DETAILED DESCRIPTION

[0030] The following description is intended to disclose the present invention and enable those skilled in the art to implement the present invention. The preferred embodiments described below are provided for illustrative purposes only, and those skilled in the art will readily appreciate other obvious variations. The basic principles of the present invention as defined in the following description may be applied to other embodiments, variations, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the present invention.

[0031] Those skilled in the art should understand that, in the disclosure of the specification, the terms "longitudinal", "transverse", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicating the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the above terms cannot be understood as limiting the present invention.

[0032] It is to be understood that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element may be one, while in another embodiment, the number of the elements may be multiple, and the term "one" should not be understood as a limitation on the quantity.

[0033] refer to Figure 1 According to a preferred embodiment of the present invention, a safety alarm device for a cable tunnel will be described in detail below, wherein the safety alarm device includes a harmful gas detection module, a main control module and an alarm module; the harmful gas detection module is used to detect the concentration of harmful gas; the main control module is connected to the harmful gas detection module and the alarm module respectively; the main control module is connected to the harmful gas detection module, and is used to monitor the concentration of harmful gas detected by the harmful gas detection module; the main control module is connected to the alarm module, and is used to control the alarm module to alarm when the concentration of harmful gas detected exceeds a preset threshold.

[0034] Exemplarily, the main control module uses a microprocessor of model STM32F103.

[0035] During use, multiple safety alarm devices are installed in the cable tunnel. The harmful gas detection modules of the multiple safety alarm devices are distributed in different positions in the cable tunnel. The harmful gas detection modules monitor the concentration of harmful gases in real time and send the detected concentration data of harmful gases to the main control module. The main control module determines whether it is necessary to control the alarm module in the monitoring center to alarm based on the preset threshold. When the concentration of harmful gases exceeds the safe range, the main control module will trigger the alarm module to sound an alarm.

[0036] In this way, when there is harmful gas in the cable tunnel, the safety alarm device can detect it in time and sound an alarm. The staff of the monitoring center will hear the alarm and will no longer rashly enter the cable tunnel, thus ensuring the safety of personnel.

[0037] For example, in order to more conveniently know the concentration of harmful gases in the cable tunnel, a handheld terminal can be provided for the staff. In this way, when the concentration of harmful gases in the cable tunnel exceeds the safe range, the staff can receive the alarm from the alarm module anytime and anywhere.

[0038] Combine Figure 2 The harmful gas detection module includes a harmful gas sensor G; the ground terminal of the harmful gas sensor G is grounded, the signal output terminal of the harmful gas sensor G is connected to the first end of a first resistor R1, the second end of the first resistor R1 is connected to the first end of a second resistor R2, and the second end of the second resistor R2 is connected to a power supply VCC1. The second end of the first resistor R1 and the first end of the second resistor R2 are connected to a first lead P1, and the first and second resistors R1, R2 are connected to the main control module via the free ends of the first lead P1.

[0039] As will be appreciated, the ground terminal of the hazardous gas sensor G is grounded to provide a stable reference potential. The signal output terminal of the hazardous gas sensor G is connected to the first end of the first resistor R1. Through the voltage divider circuit formed by the first resistor R1 and the second resistor R2, the signal output from the signal output terminal of the hazardous gas sensor G is converted into a voltage range suitable for processing by the main control module. This enables the hazardous gas sensor G to generate a corresponding electrical signal when it detects a hazardous gas, which is then transmitted to the main control module via the voltage divider circuit.

[0040] For example, the harmful gas sensor G is a carbon monoxide sensor or a methane sensor. The methane sensor can be used to detect the methane gas concentration in the cable tunnel, and the carbon monoxide sensor can be used to detect the carbon monoxide gas concentration in the cable tunnel.

[0041] Combine Figure 3 In this embodiment, the alarm module includes a third resistor R3 and an alarm BL; a first end of the alarm BL is grounded, a second end of the alarm BL is connected to the first end of the third resistor R3, a second end of the third resistor R3 is connected to a second lead P2, and the third resistor R3 is connected to the main control module through the free end of the second lead P2.

[0042] In this embodiment, the alarm BL is a high-loudness alarm, and the model used is BL-100 / 4BL-220.

[0043] Combine Figure 4 The security alarm device further includes a wireless communication module, which includes an antenna ANT, a fourth resistor R4, a first capacitor C1, a second capacitor C2 and a first inductor L1.

[0044] A first end of the fourth resistor R4 is connected to the antenna ANT and a first end of the second capacitor C2 , and a second end of the fourth resistor R4 is connected to a first end of the first capacitor C1 and a first end of the first inductor L1 .

[0045] The second end of the second capacitor C2 is connected to the second end of the first capacitor C1 , and the second end of the second capacitor C2 and the second end of the first capacitor C1 are both grounded.

[0046] The second end of the first inductor L1 is connected to the third lead P3, the second end of the first capacitor C1 is connected to the fourth lead P4, the first inductor L1 is connected to the main control module through the free end of the third lead P3, and the first capacitor C1 is connected to the main control module through the free end of the fourth lead P4.

[0047] In this embodiment, the main control module monitors the concentration of harmful gases in the cable tunnel through the harmful gas detection module. The main control module determines whether it is necessary to control the alarm module to alarm based on the preset threshold. When the concentration of harmful gases exceeds the safe range, that is, exceeds the preset threshold, the main control module will trigger the alarm module located in the monitoring center to issue an alarm.

[0048] The harmful gas detection module detects the concentration of harmful gases such as carbon monoxide or methane in the cable tunnel. The harmful gas sensor G is installed in the tunnel. When the concentration of the harmful gas exceeds the preset threshold, the harmful gas sensor G will send a signal to the main control module.

[0049] The main control module receives signals from the hazardous gas detection module, determines the threshold, and controls the alarm module to sound an alarm. The alarm module includes an alarm BL. When the main control module detects that the concentration of hazardous gases exceeds the threshold, it triggers the alarm module to sound an alarm to attract the attention of personnel. When hazardous gases are present in the cable tunnel, the safety alarm device can promptly detect and sound an alarm. When personnel at the monitoring center hear the alarm, they will no longer enter the cable tunnel, ensuring their safety.

[0050] In cable tunnel scenarios, a wireless gateway or base station is installed. The safety alarm device connects to the gateway via a wireless communication module, transmitting alarm information to the monitoring center. The main control module communicates with the monitoring center via the wireless communication module and uploads the monitored hazardous gas concentration to the monitoring center. The monitoring center staff can then check the hazardous gas concentration in the cable tunnel. This prevents inspectors from entering the tunnel without knowing the presence of hazardous gases, thus ensuring personnel safety.

[0051] Exemplarily, the security alarm device further includes a power supply module, which is connected to the main control module.

[0052] The power module provides power to the security alarm device. The power module can be battery powered or connected to an external power source via a cable. In this embodiment, a reliable power supply is selected to ensure the continuous operation of the security alarm device in the cable tunnel.

[0053] During operation, multiple safety alarm devices are installed within the cable tunnel, with their hazardous gas detection modules located at various locations. The hazardous gas detection modules monitor hazardous gas concentrations in real time and transmit this data to the main control module. The main control module determines, based on preset thresholds, whether to trigger an alarm module in the monitoring center. If the hazardous gas concentration exceeds a safe range, the main control module triggers the alarm module to sound an alarm. This alarm information is then transmitted to the monitoring center via wireless communication. Simultaneously, the power supply module ensures the proper power supply of the entire system.

[0054] In this way, when harmful gases are present in the cable tunnel, the safety alarm device can detect them in time and sound an alarm. When workers want to enter the tunnel, they will hear the alarm and will not enter the cable tunnel again, ensuring the safety of the personnel. At the same time, the monitoring center can also obtain the concentration information of harmful gases in the cable tunnel in a timely manner.

[0055] For example, mobile terminals can also be configured for patrol personnel. Through wireless communication modules, patrol personnel can obtain concentration information of harmful gases in cable tunnels anytime and anywhere, avoiding dangerous situations where patrol personnel rush into the tunnel without knowing the existence of harmful gases in the tunnel, thereby ensuring personnel safety.

[0056] Those skilled in the art will appreciate that the embodiments of the present invention described above and shown in the accompanying drawings are provided for illustrative purposes only and do not limit the present invention. The advantages of the present invention have been fully and effectively realized. The functional and structural principles of the present invention have been demonstrated and illustrated in the embodiments. Any variations or modifications may be made to the embodiments of the present invention without departing from the principles described.

Claims

1. A safety alarm device for a cable tunnel, characterized in that: The safety alarm device includes a harmful gas detection module, a main control module and an alarm module; The harmful gas detection module is used to detect the concentration of harmful gases; The main control module is connected to the harmful gas detection module and the alarm module respectively; The main control module is connected to the harmful gas detection module and is used to monitor the concentration of the harmful gas detected by the harmful gas detection module; The main control module is connected to the alarm module and is used to control the alarm module to alarm when the concentration of harmful gases detected exceeds a preset threshold.

2. The security alarm device according to claim 1, characterized in that: The harmful gas detection module includes a harmful gas sensor G; The ground terminal of the harmful gas sensor G is grounded, the signal output terminal of the harmful gas sensor G is connected to the first end of the first resistor R1, the second end of the first resistor R1 is connected to the first end of the second resistor R2, and the second end of the second resistor R2 is connected to the power supply VCC1; The second end of the first resistor R1 and the first end of the second resistor R2 are connected to a first lead P1 , and the first resistor R1 and the second resistor R2 are connected to the main control module through the free end of the first lead P1 .

3. The safety alarm device according to claim 2, characterized in that: The harmful gas sensor G is a carbon monoxide sensor or a methane sensor.

4. The security alarm device according to claim 1, characterized in that: The alarm module includes a third resistor R3 and an alarm BL; The first end of the alarm BL is grounded, the second end of the alarm BL is connected to the first end of the third resistor R3, the second end of the third resistor R3 is connected to the second lead P2, and the third resistor R3 is connected to the main control module through the free end of the second lead P2.

5. The security alarm device according to claim 1, characterized in that: The safety alarm device also includes a wireless communication module; The wireless communication module includes an antenna ANT, a fourth resistor R4, a first capacitor C1, a second capacitor C2 and a first inductor L1; A first end of the fourth resistor R4 is connected to the antenna ANT and the first end of the second capacitor C2 , and a second end of the fourth resistor R4 is connected to the first end of the first capacitor C1 and the first end of the first inductor L1 ; The second end of the second capacitor C2 is connected to the second end of the first capacitor C1, and the second end of the second capacitor C2 and the second end of the first capacitor C1 are both grounded; The second end of the first inductor L1 is connected to the third lead P3, the second end of the first capacitor C1 is connected to the fourth lead P4, the first inductor L1 is connected to the main control module through the free end of the third lead P3, and the first capacitor C1 is connected to the main control module through the free end of the fourth lead P4.

6. The security alarm device according to any one of claims 1 to 5, characterized in that: The safety alarm device also includes a power supply module; The power supply module is connected to the main control module.

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