Bolt monitoring device and system

Abstract

The invention discloses a bolt monitoring device and system.The bolt monitoring device comprises a butt joint part, a main shell, a reed piece, a circuit module and an alarm indicating device, a first magnetic attraction piece is arranged on the butt joint part, the main shell is arranged on the side, away from the first magnetic attraction piece, of the butt joint part, a movable groove is formed in the main shell, and the reed piece is arranged in the movable groove; a metal belt is arranged on the groove wall of the movable groove, the reed piece is arranged on the side, correspondingly away from the metal belt, in the movable groove, the reed piece extends towards the metal belt to be provided with a movable end, a second magnetic attraction piece is arranged on the reed piece, and the circuit module is electrically connected with the reed piece and the metal belt correspondingly. The circuit module forms a closed loop when the spring piece makes contact with the metal belt, the alarm indicating device is connected with the circuit module, the spring piece, the metal belt and the second magnetic attraction piece are arranged, the bolt monitoring device has the advantages of being simple in structure and low in cost, and the product competitiveness of the bolt monitoring device is effectively improved.

Description

Technical Field

[0001] The present invention relates to the technical field of bolt monitoring, and further to a bolt monitoring device and system. Background Art

[0002] The blade root bolts of wind turbines are the primary components connecting the blades to the turbine hub, bearing enormous loads and complex stress states. During operation, blades are subjected to impact, fatigue, and alternating loads, making them prone to breakage or loss. In severe cases, these bolts can cause the pitch mechanism to become stuck or fall into the hub and blades, damaging other components.

[0003] Currently, the main detection methods include stress monitoring and ultrasonic monitoring, but these methods have certain limitations. On the one hand, the cost is relatively high, and on the other hand, the installation and construction are difficult. Therefore, in most cases, sensors are installed on a few bolts for monitoring, and it is impossible to fully monitor all blade root bolts. If bolts that are not within the monitoring range break or fall off, they cannot be discovered in time, which poses the risk of fault expansion, increased losses, and even serious accidents. For this reason, we propose a device for bolt monitoring.

[0004] Therefore, it is urgent to develop a bolt monitoring device to solve the technical problems in the prior art. Summary of the Invention

[0005] In view of the above technical problems, an object of the present invention is to provide a bolt monitoring device that can solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A bolt monitoring device includes: a docking portion, wherein a first magnetic attraction member is provided on the docking portion, and the first magnetic attraction member is used to attract the surface of the nut flange to be tested;

[0008] A main housing, the main housing being arranged on a side of the docking portion away from the first magnetic attraction member, the main housing being provided with a movable groove, and a metal belt being provided on a groove wall of the movable groove;

[0009] a reed member, the reed member being disposed in the movable groove on a side corresponding to a side away from the metal strip, the reed member being provided with a movable end extending toward the metal strip, the movable end being suspended in the air when not in operation, and a second magnetic member being provided on a side of the reed member close to the metal strip;

[0010] a circuit module, wherein the circuit module is electrically connected to the reed member and the metal strip, respectively, and the circuit module forms a closed circuit when the reed member contacts the metal strip;

[0011] An alarm indicating device is connected to the circuit module and is used to send an alarm signal when the closed loop is disconnected.

[0012] In some embodiments, a nut is fixedly embedded in the bottom of the main shell, and the annular magnet is threadedly connected to the nut.

[0013] In some embodiments, the side of the main housing on which the metal belt is provided is arranged to correspond to the bolt to be tested when the first magnetic component adsorbs the surface of the nut flange to be tested.

[0014] In some embodiments, the alarm prompt device includes a light emitting diode, and the light emitting diode is arranged on the outer side of the main shell.

[0015] In some embodiments, the first magnetic member is a ring magnet.

[0016] In some embodiments, a snap-fit ​​fixing structure is provided between the annular magnet and the main housing, and the snap-fit ​​fixing structure locks or releases the annular magnet by rotating the main housing.

[0017] In some embodiments, the main shell is provided with a rounded structure or an involute structure.

[0018] According to another aspect of the present invention, the present invention further provides a bolt detection system, comprising:

[0019] A plurality of bolt monitoring devices as described in any one of the above embodiments are connected in series.

[0020] In some embodiments, the bolt detection system provided in the present application also includes: a communication module, which is connected to the alarm indication device, and the communication module is used to transmit the alarm signal to a remote monitoring center via any one of RS-485, Wi-Fi and 4G wireless communications.

[0021] Compared with the prior art, the bolt monitoring device provided by the present invention has the following beneficial effects:

[0022] 1. The present invention provides a reed member, a metal belt, and a second magnetic member to detect whether a bolt is loose based on the on / off state of a closed circuit. When the bolt is loose, the nut rotates axially, thereby driving the bolt monitoring device to rotate. The second magnetic member moves away from the nut, causing the internal closed circuit to be disconnected. After the closed circuit is disconnected, the alarm indicator device starts to operate, thereby providing a warning to the staff. This device has the advantages of simple structure and low cost, effectively enhancing the product competitiveness of the bolt monitoring device of the present invention.

[0023] 2. The present invention installs the bolt monitoring device on the blade root flange by magnetic attraction. During installation, it is only necessary to fit the main shell of the bolt monitoring device with the bolt, which has the advantage of easy disassembly and assembly, and provides convenience for the subsequent disassembly and maintenance of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a three-dimensional schematic diagram of the bolt monitoring device;

[0025] Figure 2 This is a schematic diagram of the cross-sectional structure of the bolt monitoring device.

[0026] In the figure: 10, docking part; 11, first magnetic member; 12, nut; 20, main housing; 21, movable groove; 30, metal belt; 40, reed member; 50, second magnetic member; 60, alarm indicator device. DETAILED DESCRIPTION

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the specific embodiments of the present invention will be described below with reference to the accompanying drawings. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings and other embodiments can be obtained based on these drawings without inventive work.

[0028] To simplify the drawings, only portions relevant to the invention are schematically depicted in each figure; they do not represent the actual structure of the product. Furthermore, to simplify the drawings and facilitate understanding, in some figures, only one component with the same structure or function is schematically depicted or labeled. In this document, "one" not only means "only one" but also "more than one."

[0029] It should be further understood that the term "and / or" used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.

[0030] It should be noted that, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they can refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in the present invention based on the specific circumstances.

[0031] In one embodiment, the reference Figure 1-2The present invention provides a bolt monitoring device, including a docking part 10, a main shell 20, a reed member 40, a circuit module and an alarm indicator device 60, wherein the docking part 10 is provided with a first magnetic member 11, the first magnetic member 11 is used to attract the surface of the flange of the nut 12 to be tested, the main shell 20 is arranged on the docking part 10 on a side away from the first magnetic member 11, a movable groove 21 is opened in the main shell 20, a metal belt 30 is provided on the groove wall of the movable groove 21, the reed member 40 is arranged in the movable groove 21 on the side corresponding to the side away from the metal belt 30, the reed member 40 is extended toward the metal belt 30 and is provided with a movable end, and a second magnetic member 50 is provided on the side of the reed member 40 close to the metal belt 30, the circuit module is electrically connected to the reed member 40 and the metal belt 30 respectively, the circuit module forms a closed circuit when the reed member 40 contacts the metal belt 30, the alarm indicator device 60 is connected to the circuit module, and the alarm indicator device 60 is used to send an alarm signal when the closed circuit is disconnected.

[0032] Specifically, a first magnetic member 11 is provided on the surface of the docking portion 10. The first magnetic member 11 is used to attract the metal surface of the flange of the nut 12 to be tested. The first magnetic member 11 adopts a rare earth neodymium iron boron magnet to ensure that the device is stably fixed in a vibration environment. In addition, a main shell 20 is provided on the side of the docking portion 10 corresponding to the side away from the first magnetic member 11. The main shell 20 can be a rectangular metal shell. A movable groove 21 is provided in the main shell 20. A metal strip 30 is provided on the side wall of one side of the movable groove 21. The metal strip 30 mainly serves as a conductive contact of the circuit module. The material of the metal strip 30 can be copper or non-magnetic stainless steel. In addition, a reed member 40 is embedded in the movable groove 21. The end thereof away from the metal strip 30 is fixed on the groove wall of the movable groove 21, and the movable end thereof extending toward the metal strip 30 is provided with a second magnetic member 50. The second magnetic member 50 is used to perform magnetic attraction with the bolt, thereby making the reed The component 40 is in contact with the metal belt 30, and the reed component 40 and the metal belt 30 are respectively connected to the circuit module through wires. When the movable end of the reed component 40 is in contact with the metal belt 30, the circuit is closed and the alarm indicator device 60 is in an open circuit state; when the nut 12 is loosened, causing the reed component 40 to be displaced and detached from the metal belt 30, the circuit is disconnected and the alarm indicator device 60 triggers an alarm, wherein the direction corresponding to the first magnetic component 11 is the installation surface, and the side of the main shell 20 close to the second magnetic component 50 is the working surface. The working surface and the installation surface are not in the same plane, so that the bolt monitoring device can adapt to more installation scenarios. For example, when the bolt monitoring device is installed on a nut with a skirt, the working surface can fully correspond to the nut and be magnetically attracted, avoiding the bolt monitoring device from being unable to be used due to the influence of the skirt, thereby ensuring the effectiveness of the monitoring effect, and effectively expanding the adaptability of the overall device.

[0033] In one embodiment, the reference Figure 1 and 2On the basis of the above embodiment, a nut 12 is fixedly embedded in the bottom of the main housing 20, and the annular magnet is correspondingly threadedly connected to the nut 12.

[0034] Specifically, a hole for embedding the nut 12 is designed at the bottom of the main shell 20. The nut 12 is made of high-strength metal material (such as non-magnetic stainless steel or carbon steel) and is fixedly embedded in the shell through a press-fitting process to ensure the connection strength between the main shell 20 and the docking part 10. At the same time, the annular magnet and the nut 12 are also threadedly connected to ensure that the annular magnet remains stable under long-term vibration conditions. The modular design allows users to quickly replace the annular magnet by tightening / loosening the screws without the need for special tools or complicated operations, thereby achieving the technical effect of quick installation and convenient maintenance.

[0035] In one embodiment, the reference Figure 1 and 2 On the basis of the above embodiment, one side of the main housing 20 provided with the metal belt 30 is arranged to correspond to the surface of the bolt to be tested when the first magnetic member 11 adsorbs the surface of the flange of the nut 12 to be tested.

[0036] Specifically, the side of the metal belt 30 provided on the main shell 20 is aligned with the axis of the bolt so that it can fit the bolt as closely as possible, thereby forming a stable mechanical contact, thereby ensuring that the second magnetic component 50 can be stably adsorbed on the metal belt 30 in the direction of the bolt, thereby ensuring the stable fit between the reed component 40 and the metal belt 30 to ensure the stability of the transmission of electrical signals.

[0037] In one embodiment, the reference Figure 1 and 2 The alarm prompt device includes a light emitting diode, which is arranged on the outer side of the main shell 20.

[0038] Specifically, the light-emitting diode is embedded in the outer side of the main shell 20 through the opening and fixed by epoxy resin encapsulation process to prevent dust or liquid from penetrating. In addition, the diode can adopt a multi-color switchable design, and different colors are controlled by the circuit module to correspond to different alarm states. For example, the red light corresponds to the bolt loosening alarm, the yellow light corresponds to the sensor failure or weak signal, and the green light corresponds to the normal operation of the equipment. The light can also be set to flash to enhance the warning effect.

[0039] In one embodiment, the reference Figure 1 and 2 Based on the above embodiment, the first magnetic member 11 is a ring magnet.

[0040] Specifically, high-performance NdFeB magnets can be used. Through the circumferential magnetic field design of the annular magnet, the adsorption force can evenly cover the flange surface of the nut 12, so as to effectively increase the adsorption force and vibration resistance of the device, and ensure the reliability and effectiveness of the monitoring of the device.

[0041] In one embodiment, based on the above embodiment, a snap-fit ​​fixing structure is provided between the annular magnet and the main housing 20 , and the snap-fit ​​fixing structure locks or releases the annular magnet by rotating the main housing 20 .

[0042] Specifically, several latches are positioned around the outer periphery of the main housing 20, and corresponding slots are defined along the edges of the annular magnet. The latches are inserted into the corresponding slots, creating a snap-fit ​​connection between the main housing 20 and the annular magnet. This enables modular replacement of the device, effectively improving its rapid installation and maintenance capabilities, and ultimately enhancing its reliability and practicality.

[0043] In some embodiments, the main housing 20 is provided with a rounded corner structure or an involute structure.

[0044] Specifically, one end of the outer periphery of the main housing 20 away from the light emitting diode is rounded or formed into an involute structure to better engage the bolt rotation, thereby achieving better fixing stability and ensuring the accuracy of the detection results.

[0045] According to another aspect of the present invention, the present invention further provides a bolt detection system, comprising a plurality of bolt monitoring devices according to any one of the above embodiments, wherein the plurality of bolt monitoring devices are connected in series.

[0046] Specifically, multiple bolt monitoring devices are connected in series via data cables, forming a chain topology. Each device comprises a main housing 20, an annular magnet, a metal belt 30, a reed element 40, and an alarm indicator 60. Powered by a unified power supply, this effectively reduces the redundancy of independent power modules. Furthermore, the devices cover multiple key monitoring nodes, enhancing comprehensive monitoring coverage and high reliability, further ensuring bolt safety.

[0047] In one embodiment, based on the above embodiment, the bolt detection system provided in this application also includes: a communication module, the communication module is connected to the alarm indication device 60, and the communication module is used to transmit the alarm signal to the remote monitoring center through any one of RS-485, Wi-Fi and 4G wireless communications.

[0048] Specifically, the communication module adopts a multi-protocol fusion architecture design, which integrates one of the three transmission modes of RS-485 industrial bus, Wi-Fi wireless LAN and 4G mobile communication. Among them, the RS-485 interface supports communication protocols and has strong anti-interference capabilities; the Wi-Fi module can seamlessly access the enterprise private cloud or local server to meet the networking needs of internal equipment in the factory; the 4G module has a built-in industrial-grade SIM card slot, which can ensure that data can be transmitted transparently in remote areas without fixed network coverage. By setting up the communication module, real-time cloud transmission of alarm signals is realized, thereby improving the responsiveness of the overall system and effectively improving the reliability and practicality of the overall system.

[0049] The working principle of the present invention is: the bolt monitoring device is adsorbed on the surface of the external nut flange and fixed by the first magnetic component 11, and the second magnetic component 50 of the reed component 40 is in contact with the surface of the external nut to form a stable contact. When the bolt is in a normally tightened state, the reed component 40 and the metal strip 30 are respectively connected to the circuit module through wires to close the circuit. When the bolt is loosened due to vibration or external force, the reed component 40 is separated from the metal strip 30 due to elastic deformation, the circuit is disconnected, and the alarm indicator device 60 is activated to send out an alarm signal.

[0050] The above are only preferred specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solutions and inventive concepts of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A bolt monitoring device, characterized in that: include: A docking portion, wherein a first magnetic attraction member is provided on the docking portion, and the first magnetic attraction member is used to attract the surface of the nut flange to be tested; A main housing, the main housing being arranged on a side of the docking portion away from the first magnetic attraction member, the main housing being provided with a movable groove, and a metal belt being provided on a groove wall of the movable groove; a reed member, the reed member being disposed in the movable groove on a side corresponding to a side away from the metal strip, the reed member being provided with a movable end extending toward the metal strip, the movable end being suspended in the air when not in operation, and a second magnetic member being provided on a side of the reed member close to the metal strip; a circuit module, wherein the circuit module is electrically connected to the reed member and the metal strip, respectively, and the circuit module forms a closed circuit when the reed member contacts the metal strip; An alarm indicating device is connected to the circuit module and is used to send an alarm signal when the closed loop is disconnected.

2. The bolt monitoring device according to claim 1, characterized in that: A nut is fixedly embedded in the bottom of the main shell, and the annular magnet is correspondingly threadedly connected to the nut.

3. The bolt monitoring device according to claim 2, characterized in that: The side of the main shell on which the metal belt is provided is arranged to correspond to the bolt to be tested when the first magnetic component adsorbs the surface of the nut flange to be tested.

4. The bolt monitoring device according to claim 3, characterized in that: The alarm prompt device includes a light emitting diode, which is arranged on the outer side of the main shell.

5. The bolt monitoring device according to any one of claims 1 to 4, characterized in that: The first magnetic attraction member is a ring magnet.

6. The bolt monitoring device according to claim 5, characterized in that: A snap-fit ​​fixing structure is provided between the annular magnet and the main housing, and the snap-fit ​​fixing structure locks or releases the annular magnet by rotating the main housing.

7. The bolt monitoring device according to claim 6, characterized in that: The main shell is provided with a rounded corner structure or an involute structure.

8. A bolt detection system, characterized in that: include: A plurality of bolt monitoring devices according to claims 1 to 7, wherein the plurality of bolt monitoring devices are connected in series.

9. The bolt monitoring device according to claim 8, characterized in that: Also includes: A communication module is connected to the alarm indication device, and is used to transmit the alarm signal to a remote monitoring center via any one of RS-485, Wi-Fi and 4G wireless communications.

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