Bolt and nut loosening and breaking monitoring device and monitoring system

Abstract

The utility model discloses a bolt and nut loosening and breaking monitoring device which comprises a loosening sensing piece. A fracture sensing member; the locking assembly is used for fixing a bolt or a nut, and the nut is installed on the flange plane of the flange; the angle dynamic part can move in the circumferential side direction of the locking assembly and drive a rotating transmission part of the angle dynamic part to rotate, and the loosening sensing part and the fracture sensing part can monitor loosening and fracture of relative displacement between the bolt and the nut by monitoring the rotating transmission part; the fracture sensing part and the loosening sensing part are both balanced with the center of the bolt, meanwhile, the utility model further discloses a monitoring system using the bolt and nut loosening and breaking monitoring device, and on the premise that high precision and high reliability are guaranteed, loosening and breaking monitoring and troubleshooting can be conducted on the bolt and the nut more conveniently and efficiently.

Description

Technical Field

[0001] The utility model relates to the technical field of bolt state detection, in particular to a bolt and nut loosening and breaking monitoring device and a monitoring system. Background Art

[0002] The basic principle of wind power generation is that the kinetic energy of the wind is converted into mechanical energy through the wind turbine of the wind power generator, and then drives the generator of the wind power generator to generate electricity and convert it into electrical energy. Among them, the hub part is the moving part of the entire wind turbine. Generally, the impeller rotates at a speed between 8 r / min and 27 r / min. However, due to various working conditions such as wind direction, wind force, pitch, and rotation, high-strength bolts are easily affected by the alternating load of the working conditions, and high-strength bolts are prone to fastener failures such as loosening or breaking under the action of vibration and resonance.

[0003] In view of the problem of loosening or breaking of the above high-strength bolts, the inventor publicly disclosed a wind turbine bolt loosening and breaking two-way monitoring sensing device with the patent publication number CN116793401A on September 22, 2023. This wind turbine bolt loosening and breaking two-way monitoring sensing device can monitor and detect bolt loosening and breaking with high precision and high reliability. During the long-term use test, it is found that the first connection component and the third connection component of this wind turbine bolt loosening and breaking two-way monitoring sensing device are prone to touch interference during the assembly process. Summary of the Utility Model

[0004] In order to overcome at least one of the above-mentioned defects of the prior art, the utility model provides a bolt and nut loosening and breaking monitoring device and a monitoring system, which can more conveniently and efficiently monitor and detect the loosening and breaking of bolts and nuts on the premise of ensuring high precision and high reliability.

[0005] The technical solution adopted by the utility model to solve its problems is as follows:

[0006] A bolt and nut loosening and breaking monitoring device, comprising:

[0007] A loosening sensing member;

[0008] A locking assembly, the locking assembly is used to fix the bolt or the nut, and the nut is installed on the flange plane of the flange;

[0009] A fracture sensing member, the fracture sensing member is used to monitor the instantaneous displacement of the nut or the bolt relative to the flange plane or the fracture displacement relative to the flange during long-term operation after fracture;

[0010] An angular dynamic component that can move around the circumferential direction of the locking component and drive the rotation transmission component of the angular dynamic component to rotate. The loosening sensing component can monitor the relative displacement between the bolt and the nut by monitoring the rotation transmission component. Both the fracture sensing component and the loosening sensing component are balanced with the bolt center.

[0011] In some embodiments of the present invention, the central axis of the rotation transmission component is perpendicular to the rotation central axis of the bolt or the nut.

[0012] In some embodiments of the present invention, the angular dynamic component further includes a scale compass component and a dynamic movable seat. The movable end of the dynamic movable seat is slidably disposed between the scale compass component and the locking component, and the rotation transmission component is in transmission connection with the scale compass component. Both the loosening sensing component and the fracture sensing component are fixedly connected to the dynamic movable seat. The scale compass component is provided on any one of the bolt, the nut, and the flange, and the dynamic movable seat is provided on one of the remaining two of the bolt, the nut, and the flange.

[0013] In some embodiments of the present invention, the rotation transmission component includes a transmission shaft body and a driving wheel body. The circumferential surface of the driving wheel body is uniformly provided with driving scale teeth. The scale compass component is uniformly provided with a plurality of driven scale openings or driven scale teeth that can engage with the driving scale teeth along the circumferential direction. A sensing element is in transmission connection on the transmission shaft body. The sensing element cooperates with the loosening sensing component to trigger and monitor the angular displacement of the driving wheel body for analyzing the relative loosening angle between the bolt and the nut.

[0014] In some embodiments of the present invention, the rotation transmission component further includes a driven wheel body. The driven wheel body meshes with a sensing driving wheel. The driving wheel body and the driven wheel body are respectively connected to both ends of the transmission shaft body, and the sensing element is fixedly connected to the sensing driving wheel.

[0015] In some embodiments of the present invention, a plurality of angle trigger points for triggering the loosening sensing component are uniformly distributed along the circumferential side of the sensing element.

[0016] In some embodiments of the present invention, the scale compass component is made of metal, silica gel, or rubber material.

[0017] In some embodiments of the present invention, both the fracture sensing component and the loosening sensing component are passive wireless sensors.

[0018] In some embodiments of the present utility model, the bolt and nut loosening and breaking monitoring device further includes a switch touch member, and the switch touch member can trigger the trigger of the break sensing member and change the state value of the break sensing member when the bolt breaks.

[0019] In some embodiments of the present utility model, the bolt and nut loosening and breaking monitoring device further includes a sensing outer casing. The switch touch member includes a quick-acting spring body and a trigger push rod member assembled inside the sensing outer casing. One end of the quick-acting spring body abuts against the sensing outer casing, and the other end of the quick-acting spring body acts on the trigger push rod member. And when the bolt breaks, the quick-acting spring body pushes a part of the trigger push rod member to extend out of the sensing outer casing, and the sensing outer casing is fixedly connected to the dynamic movable seat.

[0020] In some embodiments of the present utility model, the bolt and nut loosening and breaking monitoring device further includes an anti-disengagement limiting member. A second limiting port for inserting the anti-disengagement limiting member is further provided on the trigger push rod member, so that the trigger push rod member does not disengage from the sensing outer casing during the process of moving and extending towards the outside of the sensing outer casing.

[0021] In some embodiments of the present utility model, the axial direction of the rotation center axis of the bolt is perpendicular to the moving direction of the anti-disengagement limiting member.

[0022] In some embodiments of the present utility model, the rotation center axis of the bolt or the nut is parallel to the trigger push rod member.

[0023] In some embodiments of the present utility model, the locking assembly includes a locking hoop portion and a fastening connection portion fixedly connected to the locking hoop portion. The locking hoop portion and the fastening connection portion cooperate to clamp the bolt or the nut.

[0024] The present utility model also discloses a monitoring system, including the above-mentioned bolt and nut loosening and breaking monitoring device.

[0025] In summary, a bolt and nut loosening and breaking monitoring device and a monitoring system provided by the present utility model have the following technical effects:

[0026] The rotation transmission member of the angle dynamic member is cleverly utilized to convert the relative rotation between the angle dynamic member and the locking assembly / bolt into the rotation of the rotation transmission member itself. Furthermore, the loosening sensing member can monitor the relative displacement between the bolt and the nut for loosening, and cooperate with the fracture monitoring of the fracture sensing member, so as to judge the state of the bolt with high precision and high reliability. At the same time, compared with the existing two-way monitoring sensing device for the loosening and fracture of the fan bolt, the use of one locking assembly is reduced. It can not only be disassembled and assembled more conveniently, improve the disassembly and assembly efficiency, reduce the disassembly and assembly difficulty, be conducive to efficiently monitoring and checking the loosening and fracture of the bolt and nut, but also reduce the production and manufacturing cost and maintenance cost of the bolt and nut loosening and fracture monitoring device. Brief Description of the Drawings

[0027] Figure 1 Fig. is the overall assembly schematic diagram of a bolt and nut loosening and fracture monitoring device of the present utility model;

[0028] Figure 2 Fig. is the overall structural schematic diagram of a bolt and nut loosening and fracture monitoring device of the present utility model;

[0029] Figure 3 Fig. is the first partial assembly drawing of a bolt and nut loosening and fracture monitoring device of the present utility model;

[0030] Figure 4 Fig. is the second partial assembly drawing of a bolt and nut loosening and fracture monitoring device of the present utility model;

[0031] Figure 5 Fig. is the partial exploded structure diagram of a bolt and nut loosening and fracture monitoring device of the present utility model;

[0032] Figure 6 Fig. is the structural schematic diagram of the sensing element in the present utility model.

[0033] Reference Signs: 1 - bolt, 2 - nut, 31 - fracture sensing member, 32 - loosening sensing member, 33 - sensing driving wheel, 34 - sensing element, 35 - sensing outer housing, 36 - angle trigger point, 4 - locking assembly, 41 - locking hoop part, 42 - fastening connection part, 5 - angle dynamic member, 51 - rotation transmission member, 511 - transmission shaft body, 512 - driving wheel body, 513 - driven wheel body, 514 - driving scale teeth, 52 - scale compass member, 521 - driven scale opening, 53 - dynamic movable seat, 531 - movable end, 6 - switch touch member, 61 - quick-acting spring body, 62 - trigger top rod member, 63 - first limiting opening, 64 - second limiting opening, 7 - positioning member, 8 - anti-disengagement limiting member, 81 - anti-disengagement spring, 82 - limiting plug-in member. Detailed Embodiment

[0034] For better understanding and implementation, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present utility model.

[0035] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0036] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present utility model belongs. The terms used in the description of the present utility model herein are only for the purpose of describing specific embodiments and are not intended to limit the present utility model.

[0037] Specifically, in combination with Figures 1 to 5 As shown, the present utility model discloses a bolt and nut loosening and breaking monitoring device, which includes a loosening sensing member 32, a breaking sensing member 31, a locking assembly 4, and an angular motion sensing member 5. Among them, the locking assembly 4 includes a locking hoop portion 41 and a fastening connection portion 42 fixedly connected to the locking hoop portion 41. During use, only the locking assembly 4 needs to be sleeved on the bolt 1 or the nut 2, and through the cooperation of the locking hoop portion 41 and the fastening connection portion 42, the bolt 1 or the nut 2 is clamped to achieve the purpose of being fixed to the bolt 1 or the nut 2. In this way, there is no need to disassemble and assemble the bolt 1 and the nut 2, which not only does not damage the original structure of the bolt 1 and the nut 2, achieving the effect of non-destructive installation, but also is convenient for disassembly and assembly, effectively improving the assembly efficiency.

[0038] In this embodiment, the nut 2 is installed on the flange plane of the flange, and the breaking sensing member 31 and the loosening sensing member 32 are balanced with the center of the bolt 1. Specifically, please Figure 1 、 Figure 3 and Figure 5As shown, the rotating transmission member 51 of the above-mentioned angular dynamic member 5 is preferably arranged between the loosening sensing member 32 and the fracture sensing member 31, but is not limited to this preferred mode. According to the experience of those skilled in the art, it can also be appropriately adjusted to other positions as a conventional replacement for the preferred mode of this embodiment. The angular dynamic member 5 can move around the circumferential direction of the locking assembly 4 and drive the rotating transmission member 51 of the angular dynamic member 5 to rotate. The loosening sensing member 32 can monitor the angular displacement of the rotating transmission member 51. That is, when the angular dynamic member 5 and the bolt 1 generate relative deflection, the rotating transmission member 51 is driven to rotate, effectively converting the relative movement between the angular dynamic member 5 and the bolt 1 into the rotation of the rotating transmission member 51 around its own central axis.

[0039] Further, the loosening sensing member 32 has a loosening monitoring module and a loosening warning module. The loosening monitoring module of the loosening sensing member 32 can monitor and identify the angular displacement of the rotating transmission member 51 during rotation and generate a loosening angle count signal. The loosening angle count signal is compared with the loosening warning signal value of the loosening warning module to judge the angular displacement of the rotating transmission member 51, and further judge whether loosening occurs between the bolt 1 and the nut 2. Here, it can be understood that when loosening occurs between the bolt 1 and the nut 2, relative deflection will occur between the bolt 1 and the nut 2, and relative deflection will also occur between the bolt 1 and the flange plane of the flange and between the nut 2 and the flange plane of the flange. Therefore, the rotating transmission member 51 can generate its angular displacement by using the angular displacement between the bolt 1 and the nut 2, or the angular displacement between the bolt 1 and the flange, or the angular displacement between the nut 2 and the flange.

[0040] When the bolt 1 breaks, while relative deflection occurs between the bolt 1 and the nut 2, most importantly, the distance between either the bolt 1 or the nut 2 and the flange plane of the flange will undergo a sudden change or variation. The fracture sensing member 31 monitors the instantaneous displacement of the nut 2 or the bolt 1 relative to the flange plane or the fracture displacement (sudden change distance) relative to the flange during long-term operation after fracture, and generates a fracture count signal. The fracture count signal is compared with the bounce / distance trigger signal when setting fracture to judge whether the bolt 1 breaks.

[0041] Preferably, the central axis of the rotating transmission member 51 is perpendicular to the rotation central axis of the bolt 1 or the nut 2, so as to ensure and improve the monitoring accuracy of the loosening sensing member 32 while reducing the debugging difficulty of the loosening sensing member 32.

[0042] In this way, the rotation transmission member 51 of the angular dynamic member 5 can ensure that the looseness sensing member 32 monitors the connection structure of the bolt 1 and the nut 2 for looseness, and cooperates with the fracture monitoring of the fracture sensing member 31, so as to realize the synchronous looseness monitoring and fracture monitoring of the relative displacement between the bolt 1 and the nut 2. Compared with the existing bidirectional loosening and fracture monitoring sensing device for the fan bolt 1, this bolt and nut loosening and fracture monitoring device reduces a locking component 4, which not only saves costs, but also reduces the assembly difficulty and improves the assembly efficiency.

[0043] It should be noted that the above looseness sensing member 32 and fracture sensing member 31 are both passive wireless sensors, achieving the purpose of wireless monitoring of the looseness sensing member 32 and the fracture sensing member 31.

[0044] As a preferred embodiment of this example, specifically in combination with Figure 1 、 Figure 2 and Figure 3 shown, the above angular dynamic member 5 further includes a scale compass member 52 and a dynamic movable seat 53. Among them, the dynamic movable seat 53 is provided with a movable end 531, and the movable end 531 of the dynamic movable seat 53 slides between the scale compass member 52 and the locking component 4, that is, the dynamic movable seat 53 is clamped between the scale compass member 52 and the locking component 4 to prevent the dynamic movable seat 53 from detaching from the locking component 4, and the dynamic movable seat 53 of the angular dynamic member 5 can slide relative to the locking component 4. The looseness sensing member 32 and the fracture sensing member 31 are both fixedly connected to the dynamic movable seat 53. The fixed connection here includes but is not limited to bolt 1 connection, clamping connection, plug-in connection, adhesive connection, and any combination of the above connection methods.

[0045] It can be understood that one of the bolt 1 and the nut 2 is provided with the scale compass member 52, and the other of the bolt 1 and the nut 2 is provided with the dynamic movable seat 53. Or, one of the bolt 1 and the flange is provided with the scale compass member 52, and the other of the bolt 1 and the flange is provided with the dynamic movable seat 53. Or, one of the nut 2 and the flange is provided with the scale compass member 52, and the other of the nut 2 and the flange is provided with the dynamic movable seat 53.

[0046] Furthermore, the rotation transmission member 51 is in transmission connection with the scale compass member 52. Among them, as Figure 4 and Figure 5 shown, the rotation transmission member 51 includes a transmission shaft body 511 and a driving wheel body 512. The circumferential side surface of the driving wheel body 512 is uniformly provided with driving scale teeth 514, and the scale compass member 52 is uniformly provided with a plurality of driven scale openings 521 capable of engaging with the driving scale teeth 514 along the circumferential direction. Through the cooperation between the driving scale teeth 514 and the driven scale openings 521, the stability and accuracy of the transmission between the rotation transmission member 51 and the scale compass member 52 can be effectively ensured.

[0047] In some of these embodiments, active scale teeth 514 are evenly arranged on the circumferential side surface of the driving wheel body 512, and driven scale teeth that mesh with the active scale teeth 514 are evenly arranged on the scale compass member 52 along the circumferential direction, which can also effectively ensure the stability and accuracy of the transmission between the rotating transmission member 51 and the scale compass member 52.

[0048] In some of these embodiments, scale protrusions are arranged on one of the circumferential side surface of the driving wheel body 512 and the scale compass member 52 near the circumferential side edge, and a soft rubber layer is arranged on the other of the circumferential side surface of the driving wheel body 512 and the scale compass member 52 near the circumferential side edge. Then, the stability and accuracy of the transmission between the rotating transmission member 51 and the scale compass member 52 can also be ensured through the cooperation between the scale protrusions and the software layer.

[0049] In some of these embodiments, friction layers are configured on both the circumferential side surface of the driving wheel body 512 and the scale compass member 52 near the circumferential side edge. The friction layer here can be selected as a frosted layer, or can also be selected as a knurled layer. With such a setting, the driving between the driving wheel body 512 and the scale compass member 52 is carried out by using friction force, which can also ensure the stability and accuracy of the transmission between the rotating transmission member 51 and the scale compass member 52.

[0050] It should be supplemented that the scale compass member 52 can be made of silicone or rubber materials, so that the active scale teeth 514 of the driving wheel body 512 can stably engage with the driven scale openings 521 of the scale compass member 52 or stably mesh with the driven scale teeth of the scale compass member 52, or the friction force between the circumferential side surface of the driving wheel body 512 and the scale compass member 52 can also be increased. Of course, it is not limited to be made of silicone or rubber materials, and can also be replaced with magnetic materials.

[0051] Furthermore, specifically, please refer to Figure 3 、 Figure 5 and Figure 6 As shown, a sensing element 34 is drivingly connected to the transmission shaft body 511. The sensing element 34 cooperates with the loosening sensing member 32 to trigger and monitor the angular displacement of the driving wheel body 512, so as to analyze the relative loosening angle between the bolt 1 and the nut 2. Preferably, the sensing element 34 covers the detection ends of the loosening sensing member 32 and the fracture sensing member 31, and when the sensing element 34 deflects along with the transmission shaft body 511, it can contact and trigger the loosening sensing member 32, thereby analyzing and calculating the angular displacement of the driving wheel body 512, and further analyzing the magnitude of the angle of deflection due to the loosening of the bolt 1 and the nut 2.

[0052] In order to monitor the magnitude of the angle of deflection due to the loosening of the bolt 1 and the nut 2 with higher precision. Further, specifically, please refer to Figure 3 、 Figure 4 andFigure 5 As shown, the rotating transmission member 51 further includes a driven wheel body 513. A sensing driving wheel 33 is engaged with the driven wheel body 513. The driving wheel body 512 and the driven wheel body 513 are respectively connected to two ends of a transmission shaft body 511. A sensing element 34 is fixedly connected to the sensing driving wheel 33. The sensing element 34 is in a disc structure. The fixed connection here is preferably a plug-in fit, that is, hub protrusions are provided on the sensing driving wheel 33, and sensing assembly holes for plugging the hub protrusions are provided on the sensing element 34. Of course, the fixed connection here can also be a welding connection or a snap connection.

[0053] Preferably, please refer to Figures 2 to 5 As shown, the transmission shaft body 511 is arranged between the looseness sensing member 32 and the fracture sensing member 31, and the transmission shaft body 511 sequentially passes through the dynamic moving seat 53 and between the looseness sensing member 32 and the fracture sensing member 31. Then, the driving wheel body 512 and the driven wheel body 513 are respectively located on both sides of the looseness sensing member 32, so that the movement and acting force of the driving wheel body 512 are transmitted from the side of the dynamic moving seat 53 close to the locking assembly 4 to the side of the dynamic moving seat 53 away from the locking assembly 4 for the looseness sensing member 32 and the fracture sensing member 31 to monitor.

[0054] It should be noted that the sensing driving wheel 33 and the driven wheel body 513 can both be gears. The sensing driving wheel 33 is engaged with the driven wheel body 513, and a gear transmission is formed between the sensing driving wheel 33 and the driven wheel body 513. In other replaceable transmissions, a chain transmission and a belt transmission can also be formed between the sensing driving wheel 33 and the driven wheel body 513.

[0055] In this way, by using the precise transmission ratio between the sensing driving wheel 33 and the driven wheel body 513, the monitoring accuracy that the looseness sensing member 32 and the fracture sensing member 31 can achieve is higher. For example, when the deflection angle of the driving wheel body 512 is six degrees, after being scaled by the transmission ratio between the sensing driving wheel 33 and the driven wheel body 513, the deflection angle of the sensing element 34 is one degree.

[0056] It should also be noted that specifically, please refer to Figure 6 As shown, a number of angle trigger points 36 for triggering the looseness sensing member 32 are evenly distributed along the circumferential side of the sensing element 34. Then, when the sensing element 34 deflects, when the adjacent two angle trigger points 36 and the looseness monitoring circuit on the looseness sensing member 32 are in contact, the looseness monitoring circuit will be triggered and turned on, prompting the looseness sensing member 32 to generate a looseness angle counting signal. Furthermore, it is possible to analyze and judge whether the bolt 1 and the nut 2 are loose and the magnitude of the deflection angle due to the looseness of the bolt 1 and the nut 2 according to the looseness angle counting signal.

[0057] As a further preferred embodiment, specifically, please refer to Figure 1 andFigure 2 As shown, the bolt and nut loosening and breaking monitoring device further includes a sensing outer casing 35. The loosening sensing member 32, the breaking sensing member 31, the sensing driving wheel 33, and the sensing element 34 are all located inside the sensing outer casing 35. The sensing outer casing 35 is fixedly connected to the dynamic moving seat 53, achieving the purpose of installing and fixing the loosening sensing member 32 and the breaking sensing member 31.

[0058] As a preferred embodiment of this example, specifically in combination with Figure 2 and Figure 3 As shown, the bolt and nut loosening and breaking monitoring device further includes a switch touch member 6. When the bolt 1 breaks, the switch touch member 6 can trigger the trigger of the breaking sensing member 31 and change the state value of the breaking sensing member 31, so that the detection personnel can more clearly and quickly detect and screen out the broken bolts 1.

[0059] Specifically, specifically according to Figure 3 As shown, the switch touch member 6 includes a quick-acting spring body 61 and a trigger push rod member 62. The quick-acting spring body 61 and the trigger push rod member 62 are both assembled inside the sensing outer casing 35. One end of the quick-acting spring body 61 abuts against the sensing outer casing 35, and the other end of the quick-acting spring body 61 acts on the trigger push rod member 62. As Figure 3 shown, a quick-acting assembly port can be provided on the trigger push rod member 62. The quick-acting spring body 61 is embedded in the quick-acting assembly port, and one end of the quick-acting spring body 61 abuts against the inner side wall of the quick-acting assembly port, and the other end of the quick-acting spring body 61 abuts against the sensing outer casing 35. Then, when the bolt 1 breaks, the quick-acting spring body 61 can push a part of the trigger push rod member 62 to extend out of the sensing outer casing 35.

[0060] In addition to the above-mentioned assembly of the quick-acting spring body 61 in the quick-acting assembly port, the end of the trigger push rod member 62 can also be formed into a columnar structure. The quick-acting spring body 61 is sleeved on the columnar structure, and one end of the quick-acting spring body 61 abuts against the trigger push rod member 62, and the other end of the quick-acting spring body 61 abuts against the sensing outer casing 35. Of course, other quick-acting mechanisms in the art that can make the push rod / push pin extend out of the sensing outer casing 35 when the trigger of the breaking sensing member 31 is triggered can be used as the conventional replacement method of the above-mentioned switch touch member 6.

[0061] As a further preferred embodiment of this example, specifically according to Figure 3 shown, the bolt and nut loosening and breaking monitoring device further includes an anti-disengagement limiting member 8. A second limiting port 64 for inserting the anti-disengagement limiting member 8 is also provided on the trigger push rod member 62, so that the trigger push rod member 62 does not disengage from the sensing outer casing 35 during the process of moving and extending towards the outside of the sensing outer casing 35.

[0062] Specifically, specifically according to Figure 3As shown, the anti-disengagement limiting member 8 includes an anti-disengagement spring 81 and a limiting insertion member 82. Among them, an assembly groove for embedding the anti-disengagement spring 81 is provided inside the limiting insertion member 82. One end of the anti-disengagement spring 81 abuts against the sensing outer housing 35 or the dynamic moving seat 53, and the other end of the anti-disengagement spring 81 abuts against the inner groove wall of the assembly groove. After assembly, the limiting insertion member 82 abuts against the triggering top rod member 62 and is located on the side of the second limiting port 64. At this time, the anti-disengagement spring 81 is in a compressed state. When the triggering top rod member 62 moves and extends towards the outside of the sensing outer housing 35, when the triggering top rod member 62 moves to align the second limiting port 64 with the limiting insertion member 82, the limiting insertion member 82 is pushed into the second limiting port 64 under the action of the deformation recovery of the anti-disengagement spring 81. Thus, through the cooperation of the second limiting port 64 and the limiting insertion member 82, the movement of the triggering top rod member 62 towards the outside of the sensing outer housing 35 can be restricted, preventing the triggering top rod member 62 from detaching from the sensing outer housing 35.

[0063] As a further preferred embodiment of this embodiment, specifically, please refer to Figure 1 , Figure 2 and Figure 3 As shown, the bolt and nut loosening and breaking monitoring device further includes a positioning member 7. A first limiting port 63 for inserting the positioning member 7 is provided on the triggering top rod member 62. The positioning member 7 passes through the sensing outer housing 35 and the first limiting port 63, and restricts the angular dynamic member 5 from rotating.

[0064] Specifically, the positioning member 7 is used to keep the sensing element 34 of the angular dynamic member 5 from rotating, so as to facilitate setting the initial set values of the loosening sensing member 32 and / or the breaking sensing member 31, and to prevent the sensing element 34 from being affected by factors such as vibration during the preliminary calibration process and thus affecting the accuracy.

[0065] Preferably, a hub limiting port is provided on the hub protrusion of the sensing driving wheel 33. The positioning member 7 is inserted into the hub limiting port of the sensing driving wheel 33. Then, through the cooperation of the hub limiting port and the positioning member 7, the sensing element 34 and the sensing driving wheel 33 can be stably restricted, so that the sensing element 34 and the sensing driving wheel 33 do not deflect. The structure is simple and the operation is convenient.

[0066] It should be noted that when the bolt and nut loosening and breaking monitoring device monitors, only the positioning member 7 needs to be removed to remove the constraint force acting on the sensing driving wheel 33.

[0067] Based on the structure and connection relationship of the above bolt and nut loosening and breaking monitoring device, the inventor also discloses a monitoring system, including the above bolt and nut loosening and breaking monitoring device.

[0068] To sum up, the monitoring method of the bolt and nut loosening and breaking monitoring device and the monitoring system is as follows:

[0069] Before monitoring the bolt 1 and the nut 2, first sleeved the locking hoop part 41 of the locking assembly 4 on the bolt 1 and tightened it with the fastening connection part 42. Then, the movable end 531 of the angular motion part 5 was further assembled between the scale compass part 52 and the locking hoop part 41 of the locking assembly 4. Then, the loosening sensing part 32 and the fracture sensing part 31 were installed on the side of the bolt 1 through the motion movable seat 53 of the angular motion part 5. Finally, the initial set values of the loosening sensing part 32 and the fracture sensing part 31 were calibrated, and the positioning part 7 inserted and constrained to the angular motion part 5 was removed.

[0070] During the process of monitoring the bolt 1 and the nut 2 or during the use of the fan, assuming that the bolt 1 and the nut 2 become loose, a radial angular rotation will occur between the bolt 1 and the nut 2. The angular motion part 5 and the bolt 1 will have a relative radial rotation, and the driving wheel body 512 of the rotation transmission part 51 will rotate to drive the driven wheel body 513 to rotate. In this way, through the transmission between the sensing driving wheel 33 and the driven wheel body 513 and after proportional scaling, the sensing element 34 will decelerate and deflect, and the loosening sensing part 32 will determine that the bolt 1 and the nut 2 are loose.

[0071] Assuming that the bolt 1 breaks, the trigger push rod 62 of the switch touch part 6 will have a separation movement from the sensing outer housing 35, that is, part of the trigger push rod 62 will push out of the sensing outer housing 35, which will also trigger the trigger element of the fracture sensing part 31, thereby generating a fracture count signal, and the fracture sensing part 31 will determine that the bolt 1 breaks.

[0072] It should also be supplemented here that this monitoring method is for reference only to facilitate the understanding of the structure and connection relationship of the present invention, and is not limited to this monitoring method. The assembler can adjust according to the assembly habit and / or experience.

[0073] The technical means disclosed in the solution of the present invention are not limited to the technical means disclosed in the above embodiments, but also include the technical solutions composed of any combination of the above technical features. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements are also regarded as the protection scope of the present invention.

Claims

1. A bolt and nut loosening and breaking monitoring device, characterized in that Comprising: A loosening sensing member (32); A locking assembly (4), the locking assembly (4) being used to fix a bolt (1) or a nut (2), and the nut (2) being installed on the flange plane of the flange; A fracture sensing member (31), the fracture sensing member (31) being used to monitor the instantaneous displacement of the nut (2) or the bolt (1) relative to the flange plane or the fracture displacement relative to the flange during long-term operation after fracture; An angular motion member (5), the angular motion member (5) being able to move around the circumferential direction of the locking assembly (4) and driving the rotation transmission member (51) of the angular motion member (5) to rotate. The loosening sensing member (32) can monitor the rotation transmission member (51) to monitor the loosening of the relative displacement between the bolt (1) and the nut (2). The fracture sensing member (31) and the loosening sensing member (32) are both centered with the bolt (1).

2. The bolt and nut loosening and breaking monitoring device according to claim 1, characterized in that: The central axis of the rotation transmission member (51) is perpendicular to the rotation central axis of the bolt (1) or the nut (2).

3. The bolt and nut loosening and breaking monitoring device according to claim 1, wherein: The angular motion member (5) further includes a scale compass member (52) and a motion activity seat (53). The movable end (531) of the motion activity seat (53) slides between the scale compass member (52) and the locking assembly (4), and the rotation transmission member (51) is in transmission connection with the scale compass member (52). The loosening sensing member (32) and the fracture sensing member (31) are both fixedly connected to the motion activity seat (53). The scale compass member (52) is provided on any one of the bolt (1), the nut (2), and the flange, and the motion activity seat (53) is provided on one of the remaining two of the bolt (1), the nut (2), and the flange.

4. The bolt and nut loosening and breaking monitoring device according to claim 3, characterized in that: The rotation transmission member (51) includes a transmission shaft body (511) and a driving wheel body (512). The circumferential side of the driving wheel body (512) is evenly provided with driving scale teeth (514). The scale compass member (52) is evenly provided with a number of driven scale openings (521) or driven scale teeth that can engage with the driving scale teeth (514) along the circumferential direction. A sensing element (34) is in transmission connection on the transmission shaft body (511). The sensing element (34) cooperates with the loosening sensing member (32) to trigger and monitor the angular displacement of the driving wheel body (512) to analyze the relative loosening angle between the bolt (1) and the nut (2).

5. The bolt and nut loosening and breaking monitoring device according to claim 4, characterized in that: The rotation transmission member (51) further includes a driven wheel body (513). The driven wheel body (513) is engaged with a sensing power wheel (33). The driving wheel body (512) and the driven wheel body (513) are respectively connected to both ends of the transmission shaft body (511), and the sensing element (34) is fixedly connected to the sensing power wheel (33).

6. The bolt and nut loosening and breaking monitoring device according to claim 4 or 5, characterized in that: A number of angle trigger points (36) for triggering the loosening sensing member (32) are evenly distributed along the circumferential side of the sensing element (34).

7. The bolt and nut loosening and breaking monitoring device according to claim 3 or 4, characterized in that: The scale compass part (52) is made of metal, silica gel or rubber material.

8. The bolt and nut loosening and breaking monitoring device according to any one of claims 1 to 4, characterized in that: The fracture sensing part (31) and the loosening sensing part (32) are both passive wireless sensors.

9. The bolt and nut loosening and breaking monitoring device according to claim 3 or 4, characterized in that: It further includes a switch touch part (6). When the bolt (1) breaks, the switch touch part (6) can trigger the trigger of the fracture sensing part (31) and change the state value of the fracture sensing part (31).

10. The bolt and nut loosening and breaking monitoring device according to claim 9, characterized in that: It further includes a sensing housing (35). The switch touch part (6) includes a quick-acting spring body (61) and a trigger push rod (62) assembled inside the sensing housing (35). One end of the quick-acting spring body (61) abuts against the sensing housing (35), and the other end of the quick-acting spring body (61) acts on the trigger push rod (62). When the bolt (1) breaks, the quick-acting spring body (61) pushes a part of the trigger push rod (62) to extend out of the sensing housing (35). The sensing housing (35) is fixedly connected to the dynamic movable seat (53).

11. The bolt and nut loosening and breaking monitoring device according to claim 10, characterized in that: It further includes an anti-detachment limiting part (8). A second limiting port (64) for inserting the anti-detachment limiting part (8) is further provided on the trigger push rod (62) so that the trigger push rod (62) does not detach from the sensing housing (35) during the process of moving and extending towards the outside of the sensing housing (35).

12. The bolt and nut loosening and breaking monitoring device according to claim 11, wherein: The direction of the rotation central axis of the bolt (1) is perpendicular to the moving direction of the anti-detachment limiting part (8).

13. The bolt and nut loosening and breaking monitoring device according to claim 11, characterized in that: The rotation central axis of the bolt (1) or the nut (2) is parallel to the trigger push rod (62).

14. The bolt and nut loosening and breaking monitoring device according to any one of claims 1 to 4, characterized in that: The locking assembly (4) includes a locking hoop part (41) and a fastening connection part (42) fixedly connected to the locking hoop part (41). The locking hoop part (41) and the fastening connection part (42) cooperate to clamp the bolt (1) or the nut (2).

15. A monitoring system, characterized in that, It includes: The bolt and nut breakage and loosening monitoring device according to any one of claims 1 to 14.

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