Bolt looseness automatic detection alarm device

Abstract

The invention relates to the field of bolt detection, in particular to an automatic bolt looseness detection and alarm device. The device main body comprises a power supply assembly and a plurality of alarm assemblies, each alarm assembly comprises an indicating lamp and a buzzer alarm, the indicating lamps are used for detecting looseness of bolts and nuts, the buzzer alarms are used for detecting breakage of the bolts, and the power supply assembly comprises a solar panel. According to the invention, the electromagnetic induction principle and the circuit on-off change are utilized to realize the automatic detection and alarm functions of the two key states of bolt loosening and fracture, and a reliable monitoring means is provided for guaranteeing the safe operation of facilities and equipment. Different power supply connection modes are designed for fixed parts made of different materials, higher universality and applicability are achieved, limitation of the material properties of the fixed parts is avoided, and the application range is wider. A power supply assembly composed of a solar panel, a charging controller and a storage battery is adopted, clean energy solar energy is used for supplying power, and external power supplies such as an external mains supply are not needed.

Description

Technical Field

[0001] The invention relates to the field of bolt detection, and in particular to an automatic detection and alarm device for loose bolts. Background Art

[0002] Bolts, as widely used fasteners, play a key connecting role in many facilities and equipment, ensuring the stable combination of various components. However, it is precisely because of their easy installation and detachable characteristics that bolts are easily affected by various factors during long-term use, causing them to loosen, damage, or even break. In many actual scenarios, such as high-altitude bridge structures, tower cranes, communication base stations, large amusement facilities, and industrial equipment in narrow spaces, regular and comprehensive daily inspections or safety hazard inspections of these important connection bolts face huge challenges.

[0003] Traditional manual inspection methods are not only labor-intensive and inefficient, but also prone to missed inspections or inadequate inspections due to space limitations and inspection difficulties. Once the loose bolts are not discovered in time, the bolts will be subjected to constantly changing stresses as the equipment runs. When the stress increases and the tensile load exceeds the material strength limit, a "brittle fracture" phenomenon will occur. Once this phenomenon occurs, it is often irreversible, not only causing the installation components to shift, but in severe cases, it can also cause damage to the entire facility or equipment, leading to catastrophic safety accidents and causing huge losses to human life and property.

[0004] There are many limitations in the existing bolt detection technology. Some detection methods require complex instruments and equipment and are inconvenient to install, making them difficult to apply to bolt detection in special environments; some detection methods cannot achieve real-time automatic detection and cannot capture the instantaneous changes of bolt loosening in time, delaying the best time to take prevention and control measures. Therefore, there is an urgent need for a simple and efficient bolt loosening detection device that can automatically detect and alarm in time to solve the current problems in bolt safety monitoring and improve the operational safety of facilities and equipment.

[0005] Although the prior art such as CN104033463B discloses a loosening alarm bolt, the alarm circuit of the patent includes a DC power supply, an alarm light, a sound alarm and a knife switch connected in series, but the bolt detection can only detect whether the bolt is loose or broken, and the function is relatively single. In addition, the device is powered by an external power supply and cannot avoid the impact of failure or instability of the external power supply. Summary of the invention

[0006] The purpose of the present invention is to overcome the above problems and provide a bolt loosening automatic detection alarm device. To achieve the above purpose, the present invention adopts the following technical solutions:

[0007] A bolt loosening automatic detection alarm device comprises a device body, bolts, and nuts. The device body comprises a power supply component and a plurality of alarm components. The power supply component and the plurality of alarm components form a closed loop. The alarm components are arranged in parallel. The alarm components comprise an indicator light and a buzzer alarm. The indicator light is used to detect the loosening of the bolts and nuts, and the buzzer alarm is used to detect the breakage of the bolts.

[0008] The power supply assembly includes a solar panel.

[0009] The present invention utilizes the electromagnetic induction principle and the on-off change of the circuit to realize the automatic detection and alarm function of the two key states of bolt loosening and breaking, thereby providing a reliable monitoring means for ensuring the safe operation of facilities and equipment.

[0010] As an improvement, the alarm component also includes an electromagnetic induction switch, a permanent magnet is provided on the top surface of the nut, the electromagnetic induction switch is arranged above the nut, the electromagnetic induction switch is connected in series with the indicator light, a conductive layer and an insulating layer are provided in the bolt, the insulating layer wraps the conductive layer, and the conductive layer is arranged in parallel with the buzzer alarm.

[0011] As an improvement, the device body also includes a shell, the indicator light and buzzer alarm are arranged on the shell, a mounting groove is provided at the bottom of the shell, the bolt includes a screw rod and a bolt head, a protrusion is provided on the top of the screw rod, and anti-slip grooves are provided on the protrusion, and the screw rod and the shell are fixedly connected through the mounting groove and the protrusion.

[0012] As an improvement, the conductive layer is arranged in a U shape inside the screw, a conductive plug is provided on the protrusion, the conductive plug is connected to the conductive layer, a conductive groove is provided in the installation groove, and the screw and the shell are electrically connected to the conductive groove through the conductive plug.

[0013] As an improvement, a certain distance is set between the electromagnetic induction switch and the permanent magnet, and the distance just makes the electromagnetic induction switch in an off state. The electromagnetic induction switch is electrically connected to the shell through an inner wire, and the inner wire has a reserved length. A through groove is set in the middle of the electromagnetic induction switch, and the through groove is connected to the screw through a thread.

[0014] As an improvement, the housing is provided with a total input terminal and a total output terminal, the total input terminal and the total output terminal are electrically connected to the power supply assembly, the bolts and nuts fasten the fixed parts, and the fixed parts are made of metal material or non-metal material.

[0015] As an improvement, the fixed part is made of metal material, and the main input end and the main output end are electrically connected to the power supply component through an external conductor.

[0016] As an improvement, the fixed part is made of non-metallic material, and the main input end and the main output end are electrically connected to the power supply component through conductive silver paint.

[0017] As an improvement, the power supply component also includes a charging controller and a battery. The solar panel, charging controller and battery are electrically connected. The charging controller is provided with an overcharge protection structure, an over-discharge protection structure and a short-circuit protection structure.

[0018] As an improvement, the device body also includes conductive silver paint, the surfaces of the bolts and nuts are coated with insulating paint, the conductive silver paint is set on the bolts and nuts as marking lines, and the bolts, nuts, power supply components, indicator lights, and buzzer alarms are set in series through the conductive silver paint.

[0019] The advantages of the present invention are:

[0020] 1. The present invention can detect both loose and broken bolts at the same time, with an indicator light to indicate looseness and a buzzer alarm to indicate brokenness, providing operators with more comprehensive and accurate information on bolt status, which is more conducive to timely discovery and resolution of potential safety hazards.

[0021] 2. The present invention designs different power connection methods for fixed parts of different materials, and can be widely used in bolt connection detection of various facilities and equipment. It has stronger versatility and applicability, is not limited by the material properties of the fixed parts, and has a wider range of applications than some detection devices that can only be used in connection scenarios of specific materials.

[0022] 3. The present invention uses a power supply component consisting of a solar panel, a charging controller and a battery, and uses clean energy solar energy for power supply. It does not need to be connected to an external power source such as the mains electricity. It not only solves the problem of difficult wiring in special places such as high altitudes and outdoors, but also avoids the impact caused by external power failure or instability, ensuring that the device can continue to work stably. At the same time, the charging controller has a variety of protection structures that can effectively protect the safety of the battery and the entire power supply system, improve the reliability and stability of the device, and has obvious advantages compared to traditional devices that rely on mains electricity or batteries for power supply and lack effective protection mechanisms.

[0023] 4. The overall structure of the device of the present invention is compact, the connection method of each component is clear and relatively simple, and it is easy to install and operate. The operator can easily obtain alarm information without complex detection instruments or professional knowledge for judgment. It is very convenient to use and easier to promote and apply. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a structural diagram of an automatic detection and alarm device for loose bolts in Example 1.

[0025] Figure 2 This is a cross-sectional view of an automatic detection and alarm device for bolt loosening in Example 1.

[0026] Figure 3 This is a circuit diagram of a bolt loosening automatic detection and alarm device in Example 1.

[0027] Figure 4 This is a circuit diagram of an automatic detection and alarm device for bolt loosening in Example 2.

[0028] The symbols in the figure are:

[0029] 1. Bolt; 2. Nut; 3. Alarm component; 4. Indicator light; 5. Buzzer alarm; 6. Electromagnetic induction switch; 7. Permanent magnet; 8. Conductive layer; 9. Insulating layer; 10. Shell; 11. Mounting groove; 12. Screw; 13. Bolt head; 14. Protrusion; 15. Conductive plug; 16. Conductive groove; 17. Inner wire; 18. Through groove; 19. Main entry port; 20. Main output port; 21. Power supply component. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0031] In the description of the embodiments of the present invention, it should be noted that if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings, or the orientation or position relationship in which the invented product is usually placed when used. It is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0032] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components must be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0033] In the description of the embodiments of the present invention, "plurality" means at least 2.

[0034] In the description of the embodiments of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] The present invention is described in detail and specifically by specific examples below to provide a better understanding of the present invention, but the following examples do not limit the protection scope of the present invention.

[0036] Example 1

[0037] This embodiment discloses a bolt loosening automatic detection and alarm device.

[0038] like Figure 1 , Figure 2 , Figure 3 As shown, this embodiment includes a device body, a bolt 1, and a nut 2. The device body includes a power supply component 21 and a plurality of alarm components 3. The power supply component 21 and the plurality of alarm components 3 form a closed loop. The alarm components 3 are arranged in parallel. The alarm components 3 include an indicator light 4 and a buzzer alarm 5. The indicator light 4 is used to check whether the bolt 1 and the nut 2 are loose, and the buzzer alarm 5 is used to check whether the bolt 1 is broken.

[0039] The power supply assembly 21 includes a solar panel.

[0040] The alarm components 3 are arranged in parallel, and each alarm component 3 includes an indicator light 4, a buzzer alarm 5, and an electromagnetic induction switch 6. The indicator light 4 is used to check the looseness of the bolt 1 and the nut 2, and the buzzer alarm 5 is used to check the breakage of the bolt 1.

[0041] The alarm component 3 also includes an electromagnetic induction switch 6. A permanent magnet 7 is provided on the top surface of the nut 2. The electromagnetic induction switch 6 is arranged above the nut 2. The electromagnetic induction switch 6 is connected in series with the indicator light 4. A conductive layer 8 and an insulating layer 9 are provided in the bolt 1. The insulating layer 9 wraps the conductive layer 8. The conductive layer 8 is arranged in parallel with the buzzer alarm 5.

[0042] The resistance in the conductive layer 8 is negligible.

[0043] The device body also includes a shell 10, an indicator light 4 and a buzzer alarm 5 are arranged on the shell 10, a mounting groove 11 is provided at the bottom of the shell 10, the bolt 1 includes a screw rod 12 and a bolt head 13, a protrusion 14 is provided on the top of the screw rod 12, and an anti-slip pattern is provided on the protrusion 14, and the screw rod 12 and the shell 10 are fixedly connected through the mounting groove 11 and the protrusion 14.

[0044] The device body is also equipped with a housing 10, and the indicator light 4 and the buzzer alarm 5 are arranged on the housing 10, so that the operator can visually observe and receive the alarm information. A mounting groove 11 is arranged at the bottom of the housing 10, and a protrusion 14 is arranged at the top of the screw rod 12 of the bolt 1. The protrusion 14 has anti-slip lines. The screw rod 12 and the housing 10 are fixedly connected through the mounting groove 11 and the protrusion 14 to ensure the stability of the installation.

[0045] The conductive layer 8 is arranged in a U shape in the screw 12 , a conductive plug 15 is provided on the protrusion 14 , the conductive plug 15 is connected to the conductive layer 8 , a conductive groove 16 is provided in the mounting groove 11 , and the screw 12 and the housing 10 are electrically connected through the conductive plug 15 and the conductive groove 16 .

[0046] A conductive groove 16 is provided in the installation groove 11 , and the screw rod 12 and the housing 10 are electrically connected with each other through the conductive plug 15 and the conductive groove 16 , thereby forming a complete circuit loop.

[0047] There is a certain distance between the electromagnetic induction switch 6 and the permanent magnet 7, and the distance just makes the electromagnetic induction switch 6 in the disconnected state. The electromagnetic induction switch 6 is electrically connected to the housing 10 through the inner wire 17, and the inner wire 17 has a reserved length. A through groove 18 is provided in the middle of the electromagnetic induction switch 6, and the through groove 18 is connected to the screw 12 through a thread.

[0048] A permanent magnet 7 is disposed on the top surface of the nut 2. The electromagnetic induction switch 6 is disposed above the nut 2 and is connected in series with the indicator light 4. A specific distance is provided between the two, and the distance is just enough to make the electromagnetic induction switch 6 in an off state in the initial state.

[0049] The housing 10 is provided with a total input terminal 19 and a total output terminal 20, which are electrically connected to a power supply assembly 21, and bolts 1 and nuts 2 fasten the fixed parts, which are made of metal or non-metal materials.

[0050] The housing 10 is also provided with a main input terminal 19 and a main output terminal 20, which are electrically connected to a power supply assembly 21, and the specific connection method will vary depending on the material properties of the fixed parts (i.e., the parts connected by the bolts 1).

[0051] The fixed part is made of metal material, and the main input terminal 19 and the main output terminal 20 are electrically connected to the power supply component 21 through external wires.

[0052] The fixed part is made of non-metallic material, and the main input terminal 19 and the main output terminal 20 are electrically connected to the power supply component 21 through conductive silver paint.

[0053] If the fixed part is made of metal material, the total input terminal 19 and the total output terminal 20 are electrically connected to the power supply component 21 through an external wire; if the fixed part is made of non-metallic material, the total input terminal 19 and the total output terminal 20 are electrically connected to the power supply component 21 through conductive silver paint, so as to ensure the conductivity and normal operation of the entire device circuit.

[0054] The power supply assembly 21 also includes a charging controller and a battery. The solar panel, the charging controller and the battery are electrically connected. The charging controller is provided with an overcharge protection structure, an over-discharge protection structure and a short-circuit protection structure.

[0055] The power supply assembly 21 includes a solar panel, a charging controller and a battery, and the solar panel, the charging controller and the battery are electrically connected in sequence. The solar panel can be a high-efficiency monocrystalline silicon or polycrystalline silicon solar panel, which converts light energy into electrical energy. It is installed in a suitable location that can fully receive sunlight, such as the top of facilities and equipment, etc., which is open and unobstructed. The charging controller has an overcharge protection structure, an over-discharge protection structure and a short-circuit protection structure, which can effectively regulate and control the electric energy generated by the solar panel, ensure stable charging of the battery, and prevent the battery from being damaged due to abnormal conditions such as overcharging, over-discharging or short-circuiting, thereby extending the service life of the battery. The battery stores and provides reliable electric energy for the operation of the entire device, ensuring that the device can continue to work normally without external power access, and is particularly suitable for special use environments such as high altitude and outdoor where it is difficult to lay conventional power lines.

[0056] When the device is installed and the bolt 1 is in a normal tightening state, the power supply component 21 supplies power to the entire closed loop through a corresponding connection method (external wire or conductive silver paint, depending on the material of the fixed part), and each alarm component 3 is in standby mode.

[0057] When the bolt 1 becomes loose, the nut 2 will produce a slight displacement, causing the relative position between the permanent magnet 7 on the top surface of the nut 2 and the electromagnetic induction switch 6 to change, and the distance between the two will decrease. The electromagnetic induction switch 6 will be closed under the action of the magnetic field of the permanent magnet 7, thereby turning on the circuit where the indicator light 4 connected in series with it is located, and the indicator light 4 will light up, prompting the operator that the bolt 1 shows signs of looseness and needs to be checked and handled in time.

[0058] Once the bolt 1 breaks, since the conductive layer 8 inside the bolt 1 is U-shaped and connected in parallel with the buzzer alarm 5, the breakage will destroy the integrity of the conductive layer 8, causing the circuit state to change. At this time, the circuit where the buzzer alarm 5 is located is triggered, and the buzzer alarm 5 sounds an alarm to warn the operator that the bolt 1 has broken and there is a serious safety hazard, so that corresponding measures can be taken in time to avoid facility and equipment failures and safety accidents caused by the breakage of the bolt 1.

[0059] The whole device realizes automatic detection and alarm functions for the two key states of bolt 1 loosening and breaking through the coordinated action of the above-mentioned components, using the principle of electromagnetic induction and the change of circuit on and off, so as to provide a reliable monitoring method for ensuring the safe operation of facilities and equipment.

[0060] Bolt 1 Manufacturing:

[0061] The screw 12 and the bolt head 13 of the bolt 1 are manufactured by selecting steel of suitable strength and material, and the screw 12 is processed according to the design requirements. The conductive layer 8 and the insulating layer 9 are arranged inside the screw 12 by a specific process (such as inlaying, coating, etc.), ensuring that the insulating layer 9 completely wraps the conductive layer 8, and the conductive layer 8 is distributed in a U shape. A protrusion 14 is processed on the top of the screw 12, and the surface of the protrusion 14 is processed to form an anti-slip pattern, which is convenient for matching and fixing with the mounting groove 11 of the housing 10. At the same time, the conductive plug 15 is accurately installed on the protrusion 14 to ensure that the conductive plug 15 is firmly connected to the conductive layer 8 and has good conductive performance.

[0062] Nut 2 manufacturing:

[0063] The nut 2 is also made of a material that matches the bolt 1. The permanent magnet 7 is installed on the top surface of the nut 2 by reliable means such as bonding and inlaying to ensure that the permanent magnet 7 is accurately installed and firmly fixed. Its magnetic field strength and other parameters meet the requirements for cooperating with the electromagnetic induction switch 6 to realize the detection function.

[0064] Device main body shell 10 manufacturing and component installation:

[0065] The housing 10 is made of a durable material (such as engineering plastic or metal) with certain protective properties (such as waterproof, dustproof, and corrosion-resistant), and is processed according to the designed size and shape. The installation groove 11 is accurately processed at the bottom of the housing 10, and a conductive groove 16 is set in the installation groove 11 to ensure that the conductivity of the conductive groove 16 is good and the size matching accuracy with the installation groove 11 meets the requirements, so as to facilitate reliable connection with the conductive plug 15 of the bolt 1. The indicator light 4 and the buzzer alarm 5 are installed at appropriate positions on the housing 10, and are connected to the internal electromagnetic induction switch 6 and other components using a reasonable circuit wiring method to ensure that the connection line is stable and there is no risk of short circuit or open circuit. At the same time, a total input terminal 19 and a total output terminal 20 are set on the housing 10, and corresponding wiring holes or connection interfaces are reserved to facilitate electrical connection with the power supply component 21.

[0066] Power supply assembly 21 assembly:

[0067] Choose solar panels with appropriate specifications and power, determine their size and installation method according to the actual use environment, and perform necessary protective treatment (such as installing frames, surface coatings, etc.) to improve their durability. Choose a charging controller with complete overcharge protection, over-discharge protection, short-circuit protection and other functions. Connect the solar panel to the charging controller according to the circuit connection requirements, ensure that the connection is correct, and perform corresponding parameter settings and debugging so that it can regulate and control the electric energy normally. Choose the appropriate capacity and type (such as lead-acid battery or lithium-ion battery) of the battery according to the overall energy consumption requirements and endurance requirements of the device, reliably connect the charging controller to the battery, properly fix and protect the battery to avoid external impact or harsh environment during use, and regularly maintain the battery, such as checking the electrolyte level and charging status, to ensure its good performance and long service life.

[0068] Example 2

[0069] This embodiment discloses a bolt loosening automatic detection and alarm device.

[0070] like Figure 4 As shown, this embodiment includes a device body, a bolt 1, and a nut 2. The device body includes a power supply component 21 and a plurality of alarm components 3. The power supply component 21 and the plurality of alarm components 3 form a closed loop. The alarm components 3 are arranged in parallel. The alarm components 3 include an indicator light 4 and a buzzer alarm 5. The indicator light 4 is used to check whether the bolt 1 and the nut 2 are loose, and the buzzer alarm 5 is used to check whether the bolt 1 is broken.

[0071] The power supply assembly 21 includes a solar panel.

[0072] The device body also includes conductive silver paint. The surfaces of the bolt 1 and the nut 2 are coated with insulating paint. The conductive silver paint is set on the bolt 1 and the nut 2 as a marking line. The bolt 1, the nut 2, the indicator light 4, and the buzzer alarm 5 are set in series through the conductive silver paint.

[0073] Bolt 1 and nut 2 are the objects to be detected, and their surfaces are coated with insulating paint. The function of this layer of insulating paint is to prevent unnecessary conductive contact between bolt 1 and nut 2 and other metal parts, and ensure the accuracy and stability of the detection circuit. Only when the marking line formed by the conductive silver paint is connected normally, the circuit is in the expected on-off state. Once the bolt 1 or nut 2 is loose, the connection of the marking line may be destroyed, causing a change in the circuit state and triggering an alarm signal. This design method, which combines insulating paint and conductive silver paint, cleverly utilizes the structural characteristics of bolt 1 and nut 2 themselves, realizes accurate detection of their looseness, and has the advantages of simple structure, low cost and high reliability.

[0074] After the device is installed, the solar panel converts solar energy into electrical energy and stores it in the energy storage battery of the power supply assembly 21, providing a stable power supply for the entire detection alarm circuit. Under normal circumstances, the bolt 1 and the nut 2 are connected in series in the circuit through the conductive silver paint. Since the bolt 1 and the nut 2 are in a tightened state, the marking line formed by the conductive silver paint maintains a complete conductive connection. At this time, the circuit is in a stable state, and the indicator light 4 and the buzzer alarm 5 are not working.

[0075] When bolt 1 or nut 2 becomes loose due to various reasons, the relative position between bolt 1 and nut 2 will change slightly, which will cause the marking line formed by the conductive silver paint to be partially broken or in poor contact. At this time, the resistance of the circuit will change, and according to Ohm's law, the current in the circuit will also change accordingly. When the current change reaches the trigger threshold of indicator light 4, indicator light 4 corresponding to the loose bolt 1 or nut 2 will light up, prompting the staff that the bolt 1 or nut 2 is loose and needs to be tightened in time.

[0076] If the bolt 1 breaks, the connection of the conductive silver paint will be completely disconnected, and the circuit will be in an open circuit state instantly. At this time, the voltage of the power supply component 21 will be fully loaded on both ends of the buzzer alarm 5. Since the trigger voltage of the buzzer alarm 5 is lower than the power supply voltage, the buzzer alarm 5 will immediately emit a loud alarm to remind the staff that the bolt 1 has broken and that emergency measures need to be taken immediately, such as stopping the operation of the equipment, replacing the bolt 1, etc., to prevent serious safety accidents caused by the breakage of the bolt 1.

[0077] The specific embodiments of the present invention are described in detail above, but they are only examples, and the present invention is not equivalent to the specific embodiments described above. For those skilled in the art, any equivalent modifications and substitutions made to the present invention are also within the scope of the present invention. Therefore, the equalization changes and modifications made without departing from the spirit and scope of the present invention should be included in the scope of the present invention.

Claims

1. A bolt loosening automatic detection alarm device, characterized in that: The invention comprises a device body, a bolt (1), and a nut (2); the device body comprises a power supply component (21) and a plurality of alarm components (3); the power supply component (21) and the plurality of alarm components (3) form a closed loop; the alarm components (3) are arranged in parallel; the alarm components (3) comprise an indicator light (4) and a buzzer alarm (5); the indicator light (4) is used to detect whether the bolt (1) and the nut (2) are loose; and the buzzer alarm (5) is used to detect whether the bolt (1) is broken; The power supply component (21) comprises a solar panel.

2. The bolt loosening automatic detection alarm device according to claim 1 is characterized in that: The alarm component (3) further comprises an electromagnetic induction switch (6), a permanent magnet (7) is provided on the top surface of the nut (2), the electromagnetic induction switch (6) is arranged above the nut (2), the electromagnetic induction switch (6) is connected in series with the indicator light (4), a conductive layer (8) and an insulating layer (9) are provided in the bolt (1), the insulating layer (9) wraps the conductive layer (8), and the conductive layer (8) is arranged in parallel with the buzzer alarm (5).

3. The bolt loosening automatic detection alarm device according to claim 2 is characterized in that: The device body also includes a housing (10), the indicator light (4) and the buzzer alarm (5) are arranged on the housing (10), a mounting groove (11) is provided at the bottom of the housing (10), the bolt (1) includes a screw rod (12) and a bolt head (13), a protrusion (14) is provided at the top of the screw rod (12), and an anti-slip pattern is provided on the protrusion (14), and the screw rod (12) and the housing (10) are fixedly connected via the mounting groove (11) and the protrusion (14).

4. The bolt loosening automatic detection alarm device according to claim 3 is characterized in that: The conductive layer (8) is arranged in a U shape inside the screw rod (12); a conductive plug (15) is arranged on the protrusion (14); the conductive plug (15) is connected to the conductive layer (8); a conductive groove (16) is arranged inside the mounting groove (11); the screw rod (12) and the housing (10) are electrically connected to the conductive groove (16) via the conductive plug (15).

5. The bolt loosening automatic detection alarm device according to claim 3 is characterized in that: A certain distance is set between the electromagnetic induction switch (6) and the permanent magnet (7), and the distance just makes the electromagnetic induction switch (6) in an off state. The electromagnetic induction switch (6) is electrically connected to the housing (10) via an inner wire (17), and the inner wire (17) has a reserved length. A through groove (18) is set in the middle of the electromagnetic induction switch (6), and the through groove (18) is connected to the screw rod (12) via a thread.

6. The bolt loosening automatic detection alarm device according to claim 3 is characterized in that: The housing (10) is provided with a total inlet end (19) and a total output end (20), the total inlet end (19) and the total output end (20) are electrically connected to a power supply assembly (21), the bolts (1) and the nuts (2) fasten a fixed part, and the fixed part is made of a metal material or a non-metal material.

7. The bolt loosening automatic detection alarm device according to claim 6 is characterized in that: The fixed part is made of metal material, and the main inlet end (19) and the main output end (20) are electrically connected to the power supply component (21) via an external conductor.

8. The bolt loosening automatic detection and alarm device according to claim 6 is characterized in that: The fixed part is made of non-metallic material, and the main inlet end (19) and the main output end (20) are electrically connected to the power supply component (21) through conductive silver paint.

9. The bolt loosening automatic detection alarm device according to claim 1, characterized in that: The power supply assembly (21) also includes a charging controller and a storage battery. The solar panel, the charging controller and the storage battery are electrically connected. The charging controller is provided with an overcharge protection structure, an over-discharge protection structure and a short-circuit protection structure.

10. The bolt loosening automatic detection alarm device according to claim 1, characterized in that: The device body also includes conductive silver paint, the surfaces of the bolt (1) and the nut (2) are coated with insulating paint, the conductive silver paint is arranged on the bolt (1) and the nut (2) as a marking line, and the bolt (1), the nut (2), the power supply component (21), the indicator light (4), and the buzzer alarm (5) are arranged in series via the conductive silver paint.

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