Material crack propagation monitoring device

Abstract

The invention belongs to the technical field of crack monitoring, and particularly relates to a material crack propagation monitoring device which comprises a crack meter body, the crack meter body comprises a sleeve, a transmission rod is movably mounted at the front end of the sleeve, mounting frames are arranged below the sleeve and the transmission rod, a monitoring device is arranged in the sleeve, and the monitoring device is connected with the transmission rod. A cable is installed on the side wall of the sleeve, and a heat dissipation opening is formed in the side wall of the sleeve. Air is blown into the casing pipe through the heat dissipation assembly, so that air flow in the casing pipe is accelerated; the heat dissipation assembly comprises a fixed cylinder, a fan is fixed in the middle of the fixed cylinder, and a filter membrane is installed on the inner side of an opening of the fixed cylinder; the heat dissipation assembly is arranged to accelerate gas flow in the sleeve, and heat dissipation of the interior of the sleeve is achieved; in addition, the air flowing direction is changed by arranging the on-off assembly, back flushing of the filter membrane is achieved, impurities attached to the outer wall of the filter membrane are removed, and the good air permeability of the filter membrane is kept.

Description

Technical Field

[0001] The invention belongs to the technical field of crack monitoring, in particular to a device for monitoring the expansion of material cracks. Background Art

[0002] In the fields of construction and infrastructure, cracks are a common and unavoidable form of defect and disease in materials such as concrete. The presence of cracks not only directly weakens the mechanical properties of the structure, resulting in a decrease in load-bearing capacity, but also accelerates the intrusion of environmental media (such as moisture and corrosive ions), triggering chain reactions such as steel corrosion and concrete carbonization, significantly reducing the durability and service life of the structure. Therefore, long-term, continuous, and high-precision monitoring of crack width and its changing trends has become a core technical requirement for assessing structural health, warning of major safety hazards, and guiding scientific maintenance decisions.

[0003] Vibrating-wire sensors, with their advantages of high measurement accuracy, excellent stability, long signal transmission distance, and strong resistance to electromagnetic interference, have become a mainstream technology in crack monitoring. These sensors are typically embedded or mounted on a structure's surface or within a crack for long-term monitoring. During this process, the continuous operation of the sensor's internal electronic components (such as the excitation circuit and signal processing module) generates Joule heat that accumulates continuously. If this heat cannot be dissipated promptly, the internal temperature will rise significantly, causing component performance drift, accelerated aging, and even permanent damage, seriously threatening the reliability of the monitoring data and the long-term service stability of the equipment. To balance the inherent conflict between heat dissipation requirements and environmental protection (waterproofing, dustproofing, and corrosion resistance), existing vibrating-wire crack meters commonly use cooling holes in the device housing, covered with a waterproof and breathable membrane. This design theoretically allows internal hot air to escape through convection while relying on the membrane's microporous structure to prevent the intrusion of liquid water and solid particles.

[0004] However, the waterproof breathable membrane is directly exposed to the external environment. After long-term use, impurities easily adhere to the membrane surface, resulting in reduced air permeability, weakened airflow, and greatly reduced heat dissipation effect or even failure. To this end, the present invention provides a material crack expansion monitoring device. Summary of the Invention

[0005] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0006] The technical solution adopted by the present invention to solve the technical problem is: a material crack expansion monitoring device according to the present invention comprises: The crack meter body includes a casing, a transmission rod is movably mounted at the front end of the casing, a mounting bracket is provided below the casing and the transmission rod, a monitoring device is provided inside the casing, a cable is installed on the side wall of the casing, and a heat dissipation port is provided on the side wall of the casing; a heat dissipation assembly, through which air is blown into the interior of the sleeve to accelerate air flow within the sleeve; the heat dissipation assembly includes a fixed cylinder fixed to the rear end of the sleeve, a fan fixed in the middle of the fixed cylinder, and a filter membrane installed on the inner side of the open end of the fixed cylinder; The on-off assembly is arranged between the fan and the sleeve. The on-off assembly includes a hollow plate, which is fixed inside the fixed cylinder. Electric push rods are symmetrically installed on both sides of the hollow plate, and closing plates are fixed on the telescopic ends of the electric push rods on both sides.

[0007] Preferably, it also includes a cleaning component, which is used to clean impurities attached to the outer wall of the filter membrane, the cleaning component includes a gear ring arranged on the outside of the filter membrane, a fixing rod is fixed in the middle of the gear ring, a cleaning brush that fits the outer wall of the filter membrane is installed on the inner side of the fixing rod, and a shell is fixed to the outer wall of the fixed cylinder, the shell includes an annular portion and a long strip portion, the teeth of the gear ring extend through the opening on the side wall of the fixed cylinder to the inner side of the annular portion of the shell, a gear is installed on the inner side of the annular portion of the shell through a rotating shaft, the gear is meshed with the gear ring, the long strip portion of the shell extends toward the direction of the sleeve, and the long strip portion of the shell is connected to the inner side of the fixed cylinder through a through hole, the rotating shaft extends along the long strip portion of the shell to the through hole position, and a driving fan blade is fixed to the end of the rotating shaft away from the gear.

[0008] Preferably, a fixing plate is fixed inside the fixing cylinder, the fixing plate is arranged on a side of the fan away from the sleeve, a plurality of through holes are provided on the fixing plate, and the filter membrane is mounted on the fixing plate.

[0009] Preferably, a support frame is provided on the inner side of the filter membrane, and the support frame is formed by fixing a fixing ring and a cross, and a plurality of groups of magnetic blocks 1 are embedded on the cross, and the magnetic blocks 1 are adsorbed to the fixing plate.

[0010] Preferably, the fixing rod is provided with an inner cavity on the side facing the filter membrane, and mounting plates are symmetrically provided on both sides of the inner cavity, and multiple groups of bristles are evenly distributed on the side walls of the mounting plate, and a spring is fixed in the inner cavity to reset the mounting plate, and symmetrical through grooves are provided on the side walls of the inner cavity to allow the bristles to pass through, and a mounting rod is fixed between the through grooves on both sides, and multiple groups of magnetic blocks 2 are inlaid on the mounting rod, and a connecting rod is rotatably installed in the middle of the side wall of the mounting plate by a torsion spring, and multiple mounting rods and connecting rods are provided and evenly distributed along the length direction of the mounting plate, and a vertical rod 1 is fixed to the end of the connecting rod, and multiple magnetic blocks 3 are evenly distributed on the side of the vertical rod 1 away from the mounting plate, and the magnetic blocks 3 and the magnetic block 1 repel each other, and cross bars are fixed on the vertical rod 1 and on both sides perpendicular to the mounting rod, and multiple vertical rods 2 are fixed on the cross bar.

[0011] Preferably, a controller is further provided inside the sleeve, and the controller consists of a control mainboard and a timing module.

[0012] Preferably, a plurality of rotating rollers are evenly and rotatably mounted on both sides of the gear ring, an annular groove is provided on the inner wall of the opening provided on the fixed cylinder, and the rotating rollers are rotatably arranged in the annular groove.

[0013] Preferably, the inner diameter of the gear ring is larger than the diameter of the filter membrane, and the fixing rod is detachably mounted on the inner wall of the gear ring.

[0014] Preferably, the mounting bracket is rotatably connected to the sleeve and the transfer rod respectively.

[0015] Preferably, the middle of the mounting plate is hollow, the mounting plate is provided with an opening on the side facing the bristles, a filter is installed in the opening, and the mounting plate is provided with air holes on the side away from the bristles.

[0016] The beneficial effects of the present invention are as follows: 1. The material crack expansion monitoring device described in the present invention can accelerate the flow of gas inside the casing by arranging a heat dissipation component to transport air to the interior of the casing and discharge it from the heat dissipation port, so as to dissipate heat inside the casing, so that the monitoring device inside the casing is at a suitable working temperature, so that the monitoring structure is more accurate; filter membranes are installed in the fixed tube and the heat dissipation port. The filter membrane adopts a waterproof and breathable membrane, which can achieve the effects of waterproof, breathable and dustproof, and prevent water vapor and dust from entering the interior of the casing and affecting the equipment.

[0017] 2. The material crack expansion monitoring device described in the present invention is configured with an on-off component and a controller. The controller can time the electric push rod so that the electric push rod can be started at a fixed time. During normal heat dissipation, the telescopic end of the electric push rod is controlled to extend outward to separate the closing plate from the hollow plate. At this time, the fan blows air through the middle hole of the hollow plate into the inside of the sleeve to achieve air flow. When the timing time is reached, the controller controls the telescopic end of the electric push rod to shorten, thereby driving the closing plate to fit together with the hollow plate, thereby preventing air from continuing to enter the inside of the sleeve. The air flows inside the fixed cylinder and is finally discharged from the open position of the fixed cylinder. In this way, the filter membrane can be backflushed, impurities attached to the outer wall of the filter membrane can be cleaned, and the filter membrane can maintain good air permeability. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described below with reference to the accompanying drawings.

[0019] Figure 1 It is a perspective view of the present invention; Figure 2 It is a schematic diagram of the internal structure of the fixed cylinder of the present invention; Figure 3 yes Figure 2 Enlarged view of point A in the middle; Figure 4 A schematic diagram of the internal structure of the fixed cylinder of the present invention from another angle; Figure 5 is a side view of the present invention; Figure 6 is a top cross-sectional view of the fixing cylinder of the present invention; Figure 7 It is a structural schematic diagram of the support frame of the present invention; Figure 8 yes Figure 6 Enlarged view of point B in the middle; Figure 9 yes Figure 8 Enlarged view of point C in the middle; Figure 10 It is a top cross-sectional view of the mounting plate of the present invention.

[0020] In the figure: 1. sleeve; 2. cable; 3. heat dissipation vent; 4. mounting bracket; 5. transmission rod; 6. fixing cylinder; 7. hollow plate; 8. electric push rod; 9. closing plate; 10. fan; 11. through hole; 12. driving blade; 13. shell; 14. fixing rod; 15. cleaning brush; 16. gear ring; 17. filter membrane; 18. fixing plate; 19. gear; 20. rotating shaft; 21. rotating roller; 22. annular groove; 23. fixing ring; 24. cross; 25. magnetic block 1; 26. spring; 27. mounting plate; 28. mounting rod; 29. bristles; 30. magnetic block 2; 31. connecting rod; 32. magnetic block 3; 33. vertical rod 1; 34. horizontal rod; 35. vertical rod 2; 36. filter; 37. air hole. DETAILED DESCRIPTION

[0021] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0022] Example 1: Figures 1 to 10 As shown, a material crack expansion monitoring device according to an embodiment of the present invention includes: The crack meter body includes a casing 1, a transmission rod 5 is movably mounted at the front end of the casing 1, a mounting bracket 4 is provided below the casing 1 and the transmission rod 5, a monitoring device is provided inside the casing 1, a cable 2 is installed on the side wall of the casing 1, and a heat dissipation port 3 is provided on the side wall of the casing 1; A heat dissipation assembly blows air into the sleeve 1 to accelerate the air flow inside the sleeve 1; the heat dissipation assembly includes a fixed cylinder 6 fixed to the rear end of the sleeve 1, a fan 10 is fixed in the middle of the fixed cylinder 6, and a filter membrane 17 is installed on the inner side of the open end of the fixed cylinder 6; The on-off assembly is provided between the fan 10 and the sleeve 1. The on-off assembly includes a hollow plate 7, which is fixed inside the fixed cylinder 6. Electric push rods 8 are symmetrically mounted on both sides of the hollow plate 7. Closing plates 9 are fixed to the telescopic ends of the electric push rods 8 on both sides. During operation, a drilling device is used to drill holes on both sides of the crack in the building material, and then the mounting bracket 4 is fixed to the surface of the material using expansion bolts. The cable 2 is connected to the portable reading device. The monitoring device is a vibrating string sensor (its structure, working principle, installation and connection method are all in the existing public technology and will not be described in detail here). When the two ends of the crack are relatively displaced, the transmission rod 5 is driven to move. At this time, the movement of the transmission rod 5 can be monitored at all times through the monitoring device, and the change in the crack width can be indirectly obtained. The reading device has its own power supply, which can be powered by the cable 2 to supply power to the monitoring device, and the monitoring data can be transmitted to the reading device, so that the change in the crack width can be intuitively known. In addition, during the monitoring process, the fan 10 is started to transport air into the casing 1 and discharge it from the heat dissipation port 3, which can accelerate the flow of gas inside the casing 1 to dissipate heat inside the casing 1, so that the monitoring device inside the casing 1 is at a suitable working temperature, thereby making the monitoring structure more accurate; A filter membrane 17 is installed in both the fixed cylinder 6 and the heat dissipation port 3. The filter membrane 17 is a waterproof and breathable membrane, which can achieve waterproof, breathable and dust-proof effects, preventing water vapor and dust from entering the interior of the casing 1 and affecting the equipment; During normal heat dissipation, the telescopic end of the electric push rod 8 is controlled to extend outward, so that the closing plate 9 is separated from the hollow plate 7. At this time, the fan 10 blows air through the middle hole of the hollow plate 7 into the inside of the sleeve 1 to achieve air flow. The telescopic end of the electric push rod 8 is controlled to shorten at a regular time so that the closing plate 9 fits with the hollow plate 7, blocking the air from continuing to enter the inside of the sleeve 1. The air flows inside the fixed cylinder 6 and is finally discharged from the open position of the fixed cylinder 6. In this way, the filter membrane 17 can be backflushed, and impurities attached to the outer wall of the filter membrane 17 can be cleaned, so that the filter membrane 17 maintains good air permeability.

[0023] The cleaning assembly further includes a cleaning assembly, by which impurities attached to the outer wall of the filter membrane 17 are cleaned, the cleaning assembly including a gear ring 16 arranged on the outer side of the filter membrane 17, a fixing rod 14 being fixed in the middle of the gear ring 16, a cleaning brush 15 being mounted on the inner side of the fixing rod 14 and being in contact with the outer wall of the filter membrane 17, a shell 13 being fixed to the outer wall of the fixing cylinder 6, the shell 13 including an annular portion and an elongated portion, the teeth of the gear ring 16 extending through the opening on the side wall of the fixing cylinder 6 to the inner side of the annular portion of the shell 13, a gear 19 being rotatably mounted on the inner side of the annular portion of the shell 13 through a rotating shaft 20, the gear 19 being meshed with the gear ring 16, the elongated portion of the shell 13 extending toward the direction of the sleeve 1, and the elongated portion of the shell 13 being connected to the inner side of the fixing cylinder 6 through a through hole 11, the rotating shaft 20 extending along the elongated portion of the shell 13 to the position of the through hole 11, and a driving fan blade 12 being fixed on the end of the rotating shaft 20 away from the gear 19; During operation, when the closing plate 9 and the hollow plate 7 are in close contact, part of the air enters the shell 13 through the through hole 11, synchronously pushing the driving blades 12 to rotate, and then driving the rotating shaft 20 and the gear 19, and then pushing the gear ring 16 to rotate through the gear 19, and the gear ring 16 drives the fixed rod 14 and the cleaning brush 15 to rotate synchronously, and the cleaning brush 15 is used to clean impurities attached to the outer wall of the filter membrane 17, thereby improving the efficiency of cleaning impurities on the outer wall of the filter screen 36.

[0024] A fixing plate 18 is fixed inside the fixing cylinder 6. The fixing plate 18 is arranged on the side of the fan 10 away from the sleeve 1. The fixing plate 18 has multiple groups of through holes, and the filter membrane 17 is installed on the fixing plate 18. During operation, the fixing plate 18 is provided to provide support for the filter membrane 17 so that the filter membrane 17 can be installed inside the fixing cylinder 6. A through hole is provided on the fixing plate 18 so as not to affect air circulation.

[0025] A support frame is provided on the inner side of the filter membrane 17. The support frame is fixed by a fixing ring 23 and a cross 24. The cross 24 is inlaid with multiple groups of magnetic blocks 25. The magnetic blocks 25 are adsorbed on the fixing plate 18. During operation, the fixing ring 23 and the cross 24 are used to form a stable support frame structure, and the waterproof and breathable membrane is then wrapped on the outside of the support frame to form a stable filter membrane 17 structure. In addition, by setting a magnetic block 25, the filter membrane 17 can be stably adsorbed on the side wall of the fixing plate 18, which facilitates the installation and removal of the filter membrane 17.

[0026] The fixing rod 14 is provided with an inner cavity on the side facing the filter membrane 17, and mounting plates 27 are symmetrically provided on both sides of the inner cavity, and multiple groups of bristles 29 are evenly distributed on the side walls of the mounting plate 27. A spring 26 is fixed in the inner cavity to reset the mounting plate 27, and a through groove for allowing the bristles 29 to pass through is symmetrically opened on the side wall of the inner cavity. A mounting rod 28 is fixed between the through grooves on both sides. Multiple groups of magnetic blocks 30 are inlaid on the mounting rod 28, and a connecting rod 31 is rotatably installed in the middle of the side wall of the mounting plate 27 by a torsion spring. The mounting rod 28 and the connecting rod 31 are both provided with multiple and evenly distributed along the length direction of the mounting plate 27. The end of the connecting rod 31 is fixed with a vertical rod 1 33, and the vertical rod 1 33 is evenly distributed with multiple magnetic blocks 32 on the side away from the mounting plate 27. The magnetic blocks 32 and the magnetic blocks 1 25 repel each other. A cross bar 34 is fixed on the vertical rod 1 33 and on both sides perpendicular to the mounting rod 28. Multiple vertical rods 2 35 are fixed on the cross bar 34; During operation, the fixing rod 14 rotates and drives the cleaning brush 15 to rotate and clean along the outer wall of the filter membrane 17. The fixing rod 14 rotates and synchronously drives the magnetic block 32 to move. When the magnetic block 32 moves to the position relative to the magnetic block 1 25, the repulsive force between the magnetic block 1 25 and the magnetic block 3 32 pushes the magnetic block 3 32 to move away from the filter membrane 17, and synchronously drives the mounting plate 27, the connecting rod 31, the vertical rod 1 33, the cross rod 34, the vertical rod 2 35 and the bristles 29 away from the filter membrane 17. At this time, the spring 26 is compressed. When the magnetic block 1 25 and the magnetic block 3 32 are misaligned, Under the rebound action of the spring 26, the mounting plate 27 and the related structures are pushed to reset. When the vertical rod 2 35 is opposite to the magnetic block 2 30, it will be attracted by the magnetic block 2 30, so that the vertical rod 1 33, the cross rod 34 and the vertical rod 2 35 are tilted toward the mounting rod 28. After the vertical rod 2 35 has completely passed the magnetic block 2 30, the connecting rod 31 is driven by the torsion spring to swing back, and the vertical rod 1 33, the cross rod 34 and the vertical rod 2 35 are driven to move synchronously, so that the bristle 29 can be driven to swing back and forth, causing the bristles 29 to shake, so as to clean the impurities attached to the bristles 29 and realize automatic cleaning. When the mounting plate 27 is subjected to the repulsive force and moves in the direction away from the filter membrane 17, the bristles 29 connected to it are separated from the filter membrane 17, making the bristles 29 more likely to shake, making it easier to clean impurities attached to the bristles 29; the bristles 29 do not contact the filter membrane 17 during the reciprocating swinging process, thereby reducing the friction of the bristles 29 on the filter membrane 17, avoiding accelerated wear of the filter membrane 17, and affecting the service life of the filter membrane 17.

[0027] A controller is also provided inside the sleeve 1, and the controller consists of a control main board and a timing module. During operation, the controller can time the electric push rod 8 so that the electric push rod 8 can be started at a fixed time, and the interval time can be designed as needed. When the timing time is reached, the controller controls the telescopic end of the electric push rod 8 to shorten, thereby driving the closing plate 9 to fit with the hollow plate 7, thereby preventing air from continuing to enter the interior of the sleeve 1.

[0028] A plurality of rotating rollers 21 are evenly and rotatably installed on both sides of the gear ring 16, and an annular groove 22 is provided on the inner wall of the opening provided on the fixed cylinder 6, and the rotating rollers 21 are rotatably arranged in the annular groove 22; during operation, the gear ring 16 is supported by the rotating rollers 21 so that the gear ring 16 can be rotatably installed in the opening of the side wall of the fixed cylinder 6, and the use of the rotating rollers 21 can reduce the friction between the gear ring 16 and the inner wall of the annular groove 22, so that the rotation process of the gear ring 16 is more labor-saving.

[0029] The inner diameter of the gear ring 16 is larger than the diameter of the filter membrane 17, and the fixing rod 14 is detachably mounted on the inner wall of the gear ring 16; during operation, the fixing rod 14 is mounted on the gear ring 16 by a detachable connection, which facilitates the disassembly and assembly of the fixing rod 14. Since the inner diameter of the gear ring 16 is larger than the diameter of the filter membrane 17, the filter membrane 17 can be directly adsorbed from the middle of the gear ring 16 to the fixing plate 18, so as to quickly disassemble and assemble the filter membrane 17 and improve the efficiency of replacing the filter membrane 17.

[0030] The mounting bracket 4 is rotatably connected to the sleeve 1 and the transmission rod 5 respectively; during operation, it is convenient to fit the mounting bracket 4 to the surface of the material to make the installation more stable.

[0031] Example 2: Figure 2 As shown, in contrast to Example 1, another embodiment of the present invention is as follows: the middle of the mounting plate 27 is hollow, the mounting plate 27 is provided with an opening on the side facing the bristles 29, and a filter 36 is installed in the opening, and the mounting plate 27 is provided with an air hole 37 on the side away from the bristles 29; during operation, when the mounting plate 27 is driven to move toward the inner cavity of the fixed rod 14 by repulsive force, the air in the inner cavity can be squeezed so that the air is discharged through the air hole 37 and the opening and blown on the bristles 29 to clean the dust on the bristles 29; the filter 36 is provided to prevent dust from entering the inner cavity and avoid dust accumulation.

[0032] Working principle: Use drilling equipment to drill holes on both sides of the crack, then use expansion bolts to fix the mounting bracket 4 to the surface of the material, connect the cable 2 to the portable reading device, and the monitoring device is a vibrating wire sensor. When the two ends of the crack are relatively displaced, the transmission rod 5 is driven to move. At this time, the movement of the transmission rod 5 can be monitored by the monitoring device at all times, and the change in crack width can be indirectly obtained. The reading device has its own power supply, which can be powered by the cable 2 to supply power to the monitoring device, and the monitoring data can be transmitted to the reading device, so that the change in crack width can be intuitively known. In addition, during the monitoring process, the fan 10 is started to transport air into the casing 1 and discharge it from the heat dissipation port 3, which can accelerate the flow of gas inside the casing 1 to dissipate heat inside the casing 1, so that the monitoring device inside the casing 1 is at a suitable working temperature, thereby making the monitoring structure more accurate; A filter membrane 17 is installed in both the fixed cylinder 6 and the heat dissipation port 3. The filter membrane 17 is a waterproof and breathable membrane, which can achieve waterproof, breathable and dust-proof effects, preventing water vapor and dust from entering the interior of the casing 1 and affecting the equipment; The controller can time the electric push rod 8 so that the electric push rod 8 can be started at a fixed time, and the interval time can be designed as needed. During the normal heat dissipation process, the telescopic end of the electric push rod 8 is controlled to extend outward, so that the closing plate 9 is separated from the hollow plate 7. At this time, the fan 10 blows air through the middle hole of the hollow plate 7 into the inside of the casing 1 to achieve air flow. When the timing is reached, the controller controls the telescopic end of the electric push rod 8 to shorten, thereby driving the closing plate 9 to fit with the hollow plate 7, thereby preventing air from continuing to enter the inside of the casing 1. The air flows inside the fixed cylinder 6 and is finally discharged from the open position of the fixed cylinder 6. In this way, the filter membrane 17 can be backflushed to clean the impurities attached to the outer wall of the filter membrane 17, so that the filter membrane 17 maintains good air permeability. During the rotation of the fixed rod 14, the cleaning brush 15 is driven to rotate and clean along the outer wall of the filter membrane 17. During the rotation of the fixed rod 14, the magnetic block 32 is synchronously driven to move. When the magnetic block 32 moves to the position relative to the magnetic block 1 25, the repulsive force between the magnetic block 1 25 and the magnetic block 3 32 pushes the magnetic block 3 32 to move away from the filter membrane 17, and synchronously drives the mounting plate 27, the connecting rod 31, the vertical rod 1 33, the cross bar 34, the vertical rod 2 35 and the bristles 29 away from the filter membrane 17. At this time, the spring 26 is compressed. When the magnetic block 1 25 and the magnetic block 32 are misaligned, the spring 26 is compressed. Under the rebound effect of 26, the mounting plate 27 and related structures are pushed to reset. When the vertical rod 25 is opposite to the magnetic block 20, it will be attracted by the magnetic block 20, so that the vertical rod 1 33, the cross rod 34 and the vertical rod 2 35 are tilted toward the mounting rod 28. After the vertical rod 25 has completely passed the magnetic block 20, the connecting rod 31 is driven by the torsion spring to swing back, and the vertical rod 1 33, the cross rod 34 and the vertical rod 2 35 are driven to move synchronously, so that the bristle 29 can be driven to swing back and forth, so that the bristles 29 are shaken, so as to clean the impurities attached to the bristles 29 and realize automatic cleaning. When the mounting plate 27 is subjected to the repulsive force and moves in the direction away from the filter membrane 17, the bristles 29 connected to it are separated from the filter membrane 17, making the bristles 29 more likely to shake, making it easier to clean impurities attached to the bristles 29; the bristles 29 do not contact the filter membrane 17 during the reciprocating swinging process, thereby reducing the friction of the bristles 29 on the filter membrane 17, avoiding accelerated wear of the filter membrane 17, and affecting the service life of the filter membrane 17.

[0033] The above-mentioned front, back, left, right, up and down are all based on the Figure 1 As a benchmark, according to the person's observation perspective, the side of the device facing the observer is defined as the front, the left side of the observer is defined as the left, and so on.

[0034] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention 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 cannot be understood as limiting the scope of protection of the present invention.

[0035] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the foregoing embodiments. The foregoing embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A device for monitoring crack expansion in a material, characterized by: include: The crack meter body comprises a sleeve (1), a transmission rod (5) is movably mounted on the front end of the sleeve (1), a mounting frame (4) is provided below the sleeve (1) and the transmission rod (5), a monitoring device is provided inside the sleeve (1), a cable (2) is installed on the side wall of the sleeve (1), and a heat dissipation port (3) is provided on the side wall of the sleeve (1); a heat dissipation component, through which air is blown into the interior of the sleeve (1) to accelerate the flow of air inside the sleeve (1); the heat dissipation component comprises a fixed cylinder (6) fixed to the rear end of the sleeve (1), a fan (10) being fixed in the middle of the fixed cylinder (6), and a filter membrane (17) being installed on the inner side of the open end of the fixed cylinder (6); The on-off assembly is arranged between the fan (10) and the sleeve (1), and the on-off assembly includes a hollow plate (7), the hollow plate (7) is fixed inside the fixed cylinder (6), electric push rods (8) are symmetrically installed on both sides of the hollow plate (7), and closing plates (9) are fixed on the telescopic ends of the electric push rods (8) on both sides.

2. A material crack extension monitoring device according to claim 1, characterized in that: The cleaning assembly is further included, and the impurities attached to the outer wall of the filter membrane (17) are cleaned by the cleaning assembly. The cleaning assembly includes a toothed ring (16) arranged on the outer side of the filter membrane (17), a fixing rod (14) is fixed in the middle of the toothed ring (16), and a cleaning brush (15) is installed on the inner side of the fixing rod (14) and is in contact with the outer wall of the filter membrane (17). The outer wall of the fixing cylinder (6) is fixed with a shell (13), and the shell (13) includes an annular portion and a long strip portion. The teeth of the toothed ring (16) extend through the opening on the side wall of the fixing cylinder (6) to the shell. The inner side of the annular portion of the housing (13) is provided with a gear (19) which is rotatably mounted on the inner side of the annular portion of the housing (13) via a rotating shaft (20), and the gear (19) is engaged with the gear ring (16). The long strip portion of the housing (13) extends toward the sleeve (1), and the long strip portion of the housing (13) is connected to the inner side of the fixed cylinder (6) via a through hole (11). The rotating shaft (20) extends along the long strip portion of the housing (13) to the position of the through hole (11), and a driving blade (12) is fixed to one end of the rotating shaft (20) away from the gear (19).

3. The material crack extension monitoring device according to claim 1, characterized in that: A fixing plate (18) is fixed inside the fixing cylinder (6). The fixing plate (18) is arranged on a side of the fan (10) away from the sleeve (1). A plurality of through holes are provided on the fixing plate (18). The filter membrane (17) is mounted on the fixing plate (18).

4. A material crack extension monitoring device according to claim 2, characterized in that: A support frame is provided on the inner side of the filter membrane (17), and the support frame is fixed by a fixing ring (23) and a cross (24). A plurality of groups of magnetic blocks (25) are embedded on the cross (24), and the magnetic blocks (25) and the fixing plate (18) are adsorbed.

5. The material crack extension monitoring device according to claim 2, characterized in that: The fixing rod (14) is provided with an inner cavity on one side facing the filter membrane (17), and mounting plates (27) are symmetrically provided on both sides of the inner cavity. Multiple groups of bristles (29) are evenly distributed on the side walls of the mounting plate (27). A spring (26) is fixed in the inner cavity to reset the mounting plate (27). Through grooves are symmetrically provided on the side walls of the inner cavity to allow the bristles (29) to pass through. A mounting rod (28) is fixed between the through grooves on both sides, and multiple groups of magnetic blocks (30) are embedded on the mounting rod (28). A connecting rod is rotatably installed in the middle of the side wall of the mounting plate (27) through a torsion spring. (31), the mounting rod (28) and the connecting rod (31) are both provided with a plurality and are evenly distributed along the length direction of the mounting plate (27), a vertical rod (33) is fixed at the end of the connecting rod (31), a plurality of magnetic blocks (32) are evenly distributed on the side of the vertical rod (33) away from the mounting plate (27), the magnetic blocks (32) and the magnetic block (25) repel each other, and a horizontal rod (34) is fixed on both sides of the vertical rod (33) and the mounting rod (28), and a plurality of vertical rods (35) are fixed on the horizontal rod (34).

6. The material crack extension monitoring device according to claim 5, characterized in that: A controller is also provided inside the sleeve (1), and the controller consists of a control mainboard and a timing module.

7. The material crack extension monitoring device according to claim 2, characterized in that: A plurality of rotating rollers (21) are evenly and rotatably mounted on both sides of the gear ring (16); an annular groove (22) is provided on the inner wall of the opening provided on the fixed cylinder (6); and the rotating rollers (21) are rotatably arranged in the annular groove (22).

8. The material crack extension monitoring device according to claim 2, characterized in that: The inner diameter of the gear ring (16) is larger than the diameter of the filter membrane (17), and the fixing rod (14) is detachably mounted on the inner wall of the gear ring (16).

9. The material crack extension monitoring device according to claim 1, characterized in that: The mounting frame (4) is rotatably connected to the sleeve (1) and the transmission rod (5) respectively.

10. The material crack extension monitoring device according to claim 5, characterized in that: The middle of the mounting plate (27) is hollow, the mounting plate (27) is provided with an opening on the side facing the bristles (29), and a filter (36) is installed in the opening, and the mounting plate (27) is provided with an air hole (37) on the side away from the bristles (29).

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