Alarm device for tunnel construction

Abstract

The utility model relates to the technical field of tunnel construction safety protection, and particularly discloses an alarm device for tunnel construction, which comprises a shell, a PCB (printed circuit board), an alarm, at least two mobile power supplies for supplying energy to the PCB and the alarm, and a switcher for switching the energy supply states of different mobile power supplies, the switcher comprises a fixed block, a sliding block and an adjusting assembly for adjusting movement of the sliding block. The adjusting assembly comprises a magnet connected with the sliding block, an electromagnet magnetically attracted to the magnet and a reset spring driving the sliding block to reset. Wherein one mobile power supply supplies power to the electromagnet, and when the conducting strips located on the fixed block and the sliding block are electrically connected, the other one or more mobile power supplies supplies power to the PCB and the alarm, so that the problem that a traditional alarm cannot timely and accurately transmit an alarm signal to an operator due to insufficient electric quantity is solved; the normal construction rhythm is easily disturbed, and even safety accidents are caused.

Description

Technical Field

[0001] This application relates to the field of tunnel construction safety protection technology, and specifically discloses an alarm device for tunnel construction. Background Technology

[0002] In underground engineering construction such as tunnels and mines, blasting is a crucial process for breaking rocks and advancing the project's progress. To ensure safety, a clear and unambiguous warning signal must be issued using an alarm before any blasting operation to notify all personnel to evacuate to a safe area immediately. Currently, portable audible and visual alarms are widely used on-site due to their advantages of mobility and ease of deployment.

[0003] Existing portable alarms typically use removable dry cell batteries or rechargeable batteries as their power source. Most alarms lack an intuitive battery level display or only have a simple low battery warning light. Operators cannot quickly and accurately determine the remaining battery power during routine inspections, and only discover that the battery is depleted when the alarm completely stops working or the sound and light become noticeably weaker.

[0004] When a blasting order is issued and an alarm is required, the alarm may fail to activate due to insufficient power or momentary poor contact, or the emitted sound and light signals may be weak, intermittent, and easily drowned out by the mechanical noise at the construction site. This results in workers not receiving evacuation signals in a timely and accurate manner, thus remaining trapped in the danger zone.

[0005] Although construction regulations require safety officers to conduct a site clearance inspection before blasting, if personnel fail to begin evacuation in a timely manner due to alarm signal failure, and the safety officer issues an evacuation order after discovering omissions, the evacuation is often rushed. This not only severely disrupts the normal construction rhythm and affects the project progress, but also may lead to catastrophic safety accidents due to incomplete evacuation, posing a significant threat to life and property. In view of this, this utility model provides an alarm device for tunnel construction to solve the above problems. Utility Model Content

[0006] The purpose of this invention is to solve the problem that traditional alarms are prone to failure to transmit alarm signals to workers in a timely and accurate manner due to insufficient power, which can easily disrupt the normal construction rhythm and even cause safety accidents.

[0007] To achieve the above objectives, the basic solution of this utility model provides an alarm device for tunnel construction, including a housing, a PCB board and an alarm, and also includes at least two mobile power supplies for powering the PCB board and the alarm, and a switch for switching between different mobile power supply states.

[0008] The switcher includes a fixed block, a sliding block, and an adjustment assembly for adjusting the movement of the sliding block. The fixed block and the side opposite to the sliding block are respectively provided with conductive plates. The adjustment assembly includes a magnet connected to the sliding block, an electromagnet magnetically attracted to the magnet, and a reset spring for driving the sliding block to reset.

[0009] One of the power banks supplies power to the electromagnet, and when the conductive plates located on the fixed block and the sliding block are electrically connected, one or more other power banks supply power to the PCB board and the alarm.

[0010] Furthermore, the portable power supply consists of two components: a primary power supply for powering the electromagnet, PCB board, and alarm, and a backup power supply for switching power supply states via conductive sheets.

[0011] Furthermore, the switcher also includes a mounting tube for mounting the fixing block, the sliding block, and the adjustment assembly.

[0012] Furthermore, the adjustment assembly also includes a sliding rod and a fixed plate disposed inside the mounting tube. The sliding rod passes through the fixed plate and is slidably connected to the fixed plate. A sliding block and a magnet are respectively disposed at both ends of the sliding rod.

[0013] Furthermore, the side wall of the housing is provided with a transparent observation window, and the side wall of the sliding block is provided with an indicator rod, the end of which passes through the mounting tube and is slidably connected to the observation window.

[0014] Furthermore, the observation window is provided with scale lines.

[0015] Furthermore, the side wall of the mounting tube is provided with a groove that allows the indicator rod to slide.

[0016] Furthermore, the fixed block and the sliding block are respectively provided with magnetic adsorption strips on their opposite sides that can magnetically attract each other.

[0017] Furthermore, the housing includes a mounting shell, a top cover connected to the top of the mounting shell via a threaded connection, and a mounting base mounted on the bottom of the mounting shell.

[0018] Furthermore, the exterior of the mounting housing is equipped with an alarm indicator light and a power indicator light.

[0019] The principle and effect of this solution are as follows:

[0020] 1. Compared with existing technologies, this invention can power the PCB board and alarm when the main power supply has sufficient power, and automatically switch between the main power supply and the backup power supply when the main power supply is insufficient, thereby preventing insufficient power supply to the PCB board and alarm from affecting normal alarm power supply. This process requires no manual intervention. Even if the operator is negligent and does not notice the power indicator, the system can automatically and silently activate the backup power supply before the main power supply fails, ensuring the continuity of power supply at critical moments and greatly improving the reliability of the alarm device.

[0021] 2. The electromagnet is powered by a mains power supply. When the mains power supply has sufficient power, the electromagnet is energized and attracts the magnet, causing the sliding rod to be closer to the electromagnet. This moves the sliding block away from the fixed block, preventing the two conductive plates from contacting each other. Simultaneously, the return spring is compressed and stores energy. When the mains power supply is insufficient, the electromagnet's magnetism weakens or disappears. The elastic potential energy of the return spring causes the sliding rod to move towards the fixed block, bringing the sliding block closer to the fixed block and bringing the two conductive plates into contact. This completes the switching between mains and backup power. 3. As the mains power gradually weakens, the current supplying the electromagnet decreases, leading to a decrease in the electromagnet's magnetism and thus a decrease in its attraction to the magnet. The sliding rod and sliding block gradually move away from the electromagnet, causing the indicator rod and scale lines to slide. This allows users to intuitively judge the mains power supply level, avoiding misjudgments due to unclear indicator light changes. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 A schematic diagram of an alarm device for tunnel construction according to an embodiment of this application is shown;

[0024] Figure 2 This paper shows a schematic diagram of the interior of the mounting housing of an alarm device for tunnel construction according to an embodiment of this application;

[0025] Figure 3 A schematic diagram of the switcher structure in an alarm device for tunnel construction proposed in an embodiment of this application is shown. Detailed Implementation

[0026] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0027] The reference numerals in the accompanying drawings include: mounting base 1, mounting shell 2, top cover 3, alarm indicator light 4, power indicator light 5, main power supply 6, PCB board 7, backup power supply 8, switch 9, indicator rod 10, fixing block 11, sliding block 12, sliding rod 13, reset spring 14, fixing plate 15, magnet 16, electromagnet 17, conductive sheet 18, magnetic adsorption strip 19.

[0028] An alarm device for tunnel construction, implementing, for example Figure 1 As shown: including a housing, a PCB board 7 disposed within the housing, an alarm controlled by the PCB board 7, and at least two mobile power supplies that power the PCB board 7 and the alarm.

[0029] like Figure 2 As shown, the two power banks are a primary power source 6 and a backup power source 8. When the primary power source 6 has sufficient power, it powers the PCB board 7 and the alarm. When the primary power source 6 has insufficient power, the backup power source 8 powers the PCB board 7 and the alarm. The switching between the primary power source 6 and the backup power source 8 is achieved using a switcher 9 located inside the housing.

[0030] like Figure 3 As shown, the switch 9 includes a mounting tube, a fixed block 11 symmetrically arranged within the mounting tube, and a sliding block 12. Two conductive plates 18 are respectively provided on opposite sides of the fixed block 11 and the sliding block 12, and the two conductive plates 18 electrically control the connection between the backup power supply 8, the PCB board 7, and the alarm. When the two conductive plates 18 are not in contact, the backup power supply 8 is disconnected from the PCB board 7 and the alarm; when the two conductive plates 18 are in contact, the backup power supply 8 supplies power to the PCB board 7 and the alarm.

[0031] The sliding block 12 is moved by an adjusting component, which is powered and controlled by a power supply 6. When the power supply 6 has sufficient power, the adjusting component controls the two conductive plates 18 to not contact; when the power supply 6 has insufficient power, the adjusting component controls the two conductive plates 18 to contact.

[0032] The adjustment assembly includes a sliding rod 13 connected to the sliding block 12, a magnet 16 disposed on the sliding rod 13, and an electromagnet 17 disposed in the mounting tube and magnetically attracted to the magnet 16. The sliding block 12 and the magnet 16 are respectively disposed at both ends of the sliding rod 13. A fixing plate 15 is installed in the mounting tube. The sliding rod 13 passes through the fixing plate 15 and is slidably connected to the fixing plate 15. A return spring 14 is provided between the sliding block 12 and the fixing plate 15.

[0033] The electromagnet 17 is powered by the main power supply 6. When the main power supply 6 has sufficient power, the electromagnet 17 is energized and attracts the magnet 16, causing the sliding rod 13 to be on the side closer to the electromagnet 17. This causes the sliding block 12 to move away from the fixed block 11, and the two conductive plates 18 do not contact each other. At the same time, the return spring 14 is compressed and stores energy. When the main power supply 6 has insufficient power, the magnetism of the electromagnet 17 weakens or disappears. The elastic potential energy of the return spring 14 causes the sliding rod 13 to move towards the fixed block 11, so that the sliding block 12 moves closer to the fixed block 11 and the two conductive plates 18 contact each other. This completes the power supply switching between the main power supply 6 and the backup power supply 8.

[0034] This configuration allows the PCB board 7 and the alarm to be powered when the main power supply 6 has sufficient power. Simultaneously, when the main power supply 6 is low on power, the system automatically switches between the main power supply 6 and the backup power supply 8, preventing insufficient power to the PCB board 7 and the alarm from affecting normal alarm operation. This process requires no manual intervention. Even if the operator is negligent and fails to notice the power indicator, the system can automatically and silently activate the backup power supply 8 before the main power supply 6 fails, ensuring continuous power supply in critical moments and greatly improving the reliability of the alarm device.

[0035] In one possible embodiment, such as Figure 1 As shown, the housing includes a mounting shell 2, a top cover 3 connected to the top of the mounting shell 2 by a threaded connection, and a mounting base 1 installed at the bottom of the mounting shell 2. The mounting shell 2 provides an installation environment for the PCB board 7, the alarm, and the power bank light. The mounting base 1 facilitates the installation and fixation of the housing to the current working environment, or a wrist strap can be configured at the bottom of the mounting base 1 for construction personnel to wear.

[0036] An alarm indicator light 4 and a power indicator light 5 are respectively installed on the outside of the mounting housing 2, so that the alarm can be triggered simultaneously by sound and light signals.

[0037] In one possible embodiment, such as Figure 2 and Figure 3 As shown, a transparent observation window is provided on the side wall of the mounting housing 2, and scale lines are provided on the observation window. An indicator rod 10 is provided on the side wall of the sliding block 12, and the end of the indicator rod 10 passes through the mounting tube and is slidably connected to the observation window. When the power of the main power supply 6 gradually decreases, the current supplied by the main power supply 6 to the electromagnet 17 decreases, resulting in a decrease in the magnetism of the electromagnet 17, thereby reducing its attraction to the magnet 16. The sliding rod 13, the sliding block 12, etc., gradually move away from the electromagnet 17, causing the indicator rod 10 to slide along the scale lines. This allows the user to intuitively judge the power of the main power supply 6, avoiding the situation where the power indicator light 5 does not change significantly, leading to misjudgment of the power of the main power supply 6.

[0038] Correspondingly, a sliding groove is provided on the side wall of the mounting tube to allow the indicator rod 10 to slide. The sliding groove limits and guides the sliding of the indicator rod 10, and at the same time prevents the sliding rod 13 from deflecting and affecting the normal alignment of the two conductive sheets 18.

[0039] In one possible embodiment, the fixed block 11 and the sliding block 12 are respectively provided with magnetic adsorption strips 19 on the opposite side. The two magnetic adsorption strips 19 are magnetically adsorbed, thereby improving the tightness of the fit between the fixed block 11 and the sliding block 12, so as to avoid the elastic potential energy of the reset spring 14 causing the sliding block 12 to oscillate back and forth after the electromagnet 17 is de-energized, which would affect the normal fit of the two conductive sheets 18.

[0040] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any indirect modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. An alarm device for tunnel construction, comprising a housing, a PCB board, and an alarm unit, characterized in that: It also includes at least two power banks for powering the PCB board and the alarm, and a switch for switching between different power bank power supply states; The switcher includes a fixed block, a sliding block, and an adjustment assembly for adjusting the movement of the sliding block. The fixed block and the side opposite to the sliding block are respectively provided with conductive plates. The adjustment assembly includes a magnet connected to the sliding block, an electromagnet magnetically attracted to the magnet, and a reset spring for driving the sliding block to reset. One of the power banks supplies power to the electromagnet, and when the conductive plates located on the fixed block and the sliding block are electrically connected, one or more other power banks supply power to the PCB board and the alarm.

2. The alarm device for tunnel construction according to claim 1, characterized in that, The portable power supply consists of two components: a primary power supply that powers the electromagnet, PCB board, and alarm, and a backup power supply that switches power states via conductive plates.

3. The alarm device for tunnel construction according to claim 1, characterized in that, The switcher also includes a mounting tube for mounting the fixing block, the sliding block, and the adjustment components.

4. The alarm device for tunnel construction according to claim 3, characterized in that, The adjustment assembly also includes a sliding rod and a fixed plate disposed inside the mounting tube. The sliding rod passes through the fixed plate and is slidably connected to the fixed plate. A sliding block and a magnet are respectively disposed at both ends of the sliding rod.

5. The alarm device for tunnel construction according to claim 4, characterized in that, The housing sidewall is provided with a transparent observation window, and the sliding block sidewall is provided with an indicator rod, the end of which passes through the mounting tube and is slidably connected to the observation window.

6. The alarm device for tunnel construction according to claim 5, characterized in that, The observation window is equipped with scale lines.

7. An alarm device for tunnel construction according to claim 5, characterized in that, The side wall of the mounting tube is provided with a groove that allows the indicator rod to slide.

8. The alarm device for tunnel construction according to claim 1, characterized in that, The fixed block and the sliding block are respectively provided with magnetic adsorption strips on the opposite side of each other, which can magnetically attract each other.

9. An alarm device for tunnel construction according to claim 1, characterized in that, The housing includes a mounting shell, a top cover connected to the top of the mounting shell by a threaded connection, and a mounting base installed at the bottom of the mounting shell.

10. An alarm device for tunnel construction according to claim 9, characterized in that, The exterior of the mounting housing is equipped with an alarm indicator light and a power indicator light.

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