An engineering security monitoring device

Abstract

This invention relates to the field of security monitoring technology and discloses an engineering security monitoring device, including a cylindrical shell with an air inlet and an air outlet at both ends. An electrical component is placed inside the air outlet. A heat-conducting plate is located on the side of the electrical component near the center of the cylindrical shell, and the heat-conducting plate is thermally connected to the heat-generating part of the electrical component. A heat-conducting strip is provided on the side of the heat-conducting plate. The device also includes an active heat dissipation mechanism and an air inlet adjustment mechanism. The active heat dissipation mechanism includes a main shaft rotatably connected to the side of the heat-conducting plate and heat dissipation blades located at the end of the main shaft. This invention cleverly overcomes the static friction of the blades through an energy storage and release start-up design, ensuring reliable triggering of forced heat dissipation at high temperatures. It has a simple structure and is easy to install, making it particularly suitable for outdoor scenarios without power supply or where wiring is difficult.

Description

Technical Field

[0001] This invention relates to the field of security monitoring technology, specifically an engineering security monitoring device. Background Technology

[0002] As crucial facilities for ensuring public and production safety, engineering security monitoring devices typically operate continuously for extended periods in complex outdoor environments. Outdoor weather conditions are highly variable, with drastic temperature fluctuations. The integrated image sensors, data processing chips, and other electronic components within these devices are extremely sensitive to operating temperatures. Prolonged exposure to high temperatures directly impacts their operational stability, image acquisition quality, and even the overall lifespan of the device. Therefore, to ensure reliable performance under various harsh conditions, monitoring equipment must be equipped with an efficient and stable heat dissipation structure to promptly dissipate and cool its internal components.

[0003] Currently, most existing technologies for heat dissipation in outdoor security monitoring devices employ relatively simple structural solutions. A common design involves embedding a cooling fan within the device's casing, using active ventilation to accelerate internal airflow and remove heat generated by electronic components. While this method alleviates temperature rise to some extent, its operation is highly dependent on independent power, requiring additional power lines for the fan during actual installation. In outdoor construction scenarios, this complex wiring significantly increases the complexity of the installation process and reduces construction flexibility and site adaptability. Furthermore, existing heat dissipation solutions have limitations in energy consumption and structural compatibility. Relying solely on fans for physical cooling lacks a comprehensive consideration of power consumption and heat dissipation efficiency, and insufficient structural integration between the fan and the monitoring unit affects the overall compactness and protective performance. Therefore, simplifying the heat dissipation structure, reducing on-site installation difficulty, and achieving integrated design that combines energy optimization and structural integration while ensuring effective heat dissipation during long-term operation of outdoor security monitoring devices have become urgent technical problems to be solved by those skilled in the art. Summary of the Invention

[0004] This invention provides an engineering security monitoring device that solves the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] An engineering security monitoring device includes a cylindrical shell with an air inlet and an air outlet at both ends. An electrical component is placed inside the air outlet. A heat-conducting plate is provided on the side of the electrical component near the center of the cylindrical shell. The heat-conducting plate is thermally connected to the heat-generating part of the electrical component. A heat-conducting strip is provided on the side of the heat-conducting plate. The device also includes an active heat dissipation mechanism and an air intake adjustment mechanism.

[0007] An air intake regulating mechanism is used to control the opening or closing of the air intake port according to the temperature of the heat-conducting strip. When the temperature of the heat-conducting strip reaches a first preset value, the air intake regulating mechanism opens the air intake port; when the temperature of the heat-conducting strip is lower than the first preset value, the air intake regulating mechanism closes the air intake port.

[0008] The active heat dissipation mechanism includes a main shaft rotatably connected to the side of the heat-conducting plate and heat dissipation blades disposed at the end of the main shaft. When the temperature of the heat-conducting strip reaches a second preset value higher than the first preset value, the active heat dissipation mechanism drives the main shaft to rotate, and the heat dissipation blades generate airflow toward the air outlet.

[0009] As a preferred embodiment of the present invention, the heat-conducting strip has a U-shaped structure, and the active heat dissipation mechanism includes a lifting component disposed at the bent portion of the heat-conducting strip. A lifting column is disposed on the side of the lifting component, and a rack is disposed at the end of the lifting column. A driven gear that cooperates with the rack is disposed in the middle of the main shaft. When the temperature of the heat-conducting strip reaches the second preset value, the lifting component pushes the lifting column to move toward the main shaft, and the rack drives the driven gear to rotate.

[0010] As a preferred embodiment of the present invention, the lifting assembly includes a storage tank fixedly connected to the heat-conducting strip, the storage tank being filled with a paraffin drive block, and an ejector piston slidably connected to the side of the storage tank near the main shaft. The ejector piston moves with the thermal expansion of the paraffin drive block. The lifting assembly also includes an energy-absorbing device and a limiting device. The energy-absorbing device is used to absorb the kinetic energy of the ejector piston rising, and the limiting device is used to control the energy-absorbing device to release potential energy to drive the lifting column to move. The outer wall of the storage tank is provided with a guide assembly for guiding the direction of movement of the lifting column.

[0011] As a preferred embodiment of the present invention, the energy-absorbing device includes a bottom plate slidably connected to the inner wall of the storage tank, a sliding sleeve provided on the side of the bottom plate near the main shaft, a sliding rod slidably connected inside the sliding sleeve, a top plate fixedly connected to the end of the sliding rod, an energy-absorbing spring provided between the top plate and the bottom plate, a push block abutting against the top plate provided on the side of the lifting column, and a retaining ring provided on the inner wall of the storage tank, the inner diameter of the retaining ring being smaller than the outer diameter of the bottom plate and the top plate.

[0012] As a preferred embodiment of the present invention, the limiting device includes a slide groove fixedly connected to the end of the storage tank, a slider slidably connected in the slide groove, a limiting spring provided in the slide groove to drive the slider to move toward the storage tank, a limiting wedge block provided on the side of the slider near the storage tank, and a deflection plate that cooperates with the limiting wedge block rotatably connected to the top of the top plate.

[0013] As a preferred embodiment of the present invention, the guiding assembly includes a U-shaped frame fixedly connected to the storage tank. The inner wall of the U-shaped frame is provided with a diamond-shaped guide groove. A guide post is slidably connected in the diamond-shaped guide groove. The middle part of the guide post is fixedly connected to the end of the lifting post. When the guide post is located in the vertical groove of the diamond-shaped guide groove near the heat-conducting plate, the rack and the driven gear are in the same vertical plane. When the guide post is located in the vertical groove of the diamond-shaped guide groove away from the heat-conducting plate, the rack and the driven gear are offset from each other.

[0014] As a preferred embodiment of the present invention, the air intake adjustment mechanism includes a fixed plate fixedly connected to the inner wall of the outer shell of the cylinder. A tensioning rod is slidably connected to the middle of the fixed plate. A plug that cooperates with the air intake is provided at one end of the tensioning rod near the air intake. A tensioning spring is provided between the plug and the fixed plate to drive the plug to move toward the air intake. A push plate is provided at one end of the tensioning rod away from the air intake. A shape memory alloy component is provided at the end of the heat-conducting strip. When the temperature of the shape memory alloy component reaches the first preset value, it expands and pushes the push plate, causing the tensioning rod to move against the elastic force of the tensioning spring, thereby driving the plug away from the air intake. When the temperature of the shape memory alloy component is lower than the first preset value, the shape memory alloy component contracts, and the tensioning spring drives the plug to reset to close the air intake.

[0015] As a preferred embodiment of the present invention, the outer wall of the electrical component is provided with a first heat dissipation fin that is fixedly connected to the inner wall of the cylindrical shell, the outer side of the heat conduction strip is fitted with a bottom shell that is fixedly connected to the cylindrical shell, the side of the heat conduction strip is provided with a second heat dissipation fin that extends to the outside of the bottom shell, and the bottom of the cylindrical shell is provided with a bracket.

[0016] The present invention has the following advantages:

[0017] 1. Graded adaptive temperature control: Through a purely mechanical structure, it achieves three-level automatic adjustment of "low temperature sealing - medium temperature ventilation - high temperature strong heat dissipation", which takes into account both the protection performance and heat dissipation requirements of the equipment.

[0018] 2. High reliability: All components are driven by pure mechanical means, requiring no electricity, sensors or control circuits, which fundamentally eliminates the risk of electronic component failure in extreme environments, making it especially suitable for harsh outdoor working conditions.

[0019] 3. Low power consumption and easy installation: No additional power supply is required for the cooling system, simplifying wiring requirements. Combined with wireless communication solutions, it enables extremely simple installation.

[0020] 4. Unidirectional drive protection: The guide component design ensures that the rack only drives the heat dissipation blades during the heating process and automatically disengages during descent, avoiding mechanical interference or damage that may be caused by reverse transmission.

[0021] 5. Energy storage and release start-up: Through the cooperation of the energy absorption device and the limiting device, the slow expansion force of the paraffin drive block is converted into an instantaneous release impact force, which reliably overcomes the static friction of the heat dissipation blades and ensures the effective triggering of the forced heat dissipation function at high temperatures. Attached Figure Description

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

[0023] Figure 1 This is a structural schematic diagram of an engineering security monitoring device.

[0024] Figure 2 This is a front view of an engineering security monitoring device.

[0025] Figure 3 This is a schematic diagram of the internal structure of the outer shell of an engineering security monitoring device.

[0026] Figure 4 for Figure 3 The front view.

[0027] Figure 5 This is a schematic diagram of the air intake adjustment mechanism in an engineering security monitoring device.

[0028] Figure 6 This is a schematic diagram of the active heat dissipation mechanism in an engineering security monitoring device.

[0029] Figure 7 This is a schematic diagram of the internal structure of a storage tank in an engineering security monitoring device.

[0030] Figure 8 This is a schematic diagram of the energy-absorbing device in an engineering security monitoring system.

[0031] Figure 9 for Figure 8 A magnified view of part A in the diagram.

[0032] Figure 10 This is a schematic diagram of the structure of a guide component in an engineering security monitoring device.

[0033] In the diagram: 1. Outer shell; 2. Support; 3. Bottom shell; 4. Electrical components; 5. First heat dissipation fin; 6. Second heat dissipation fin; 7. Heat-conducting plate; 8. Heat-conducting strip; 9. Active heat dissipation mechanism; 10. Air intake adjustment mechanism; 11. Air inlet; 12. Air outlet; 13. Fixing plate; 14. Plug; 15. Tensioning spring; 16. Tensioning rod; 17. Push plate; 18. Shape memory alloy component; 19. Main shaft; 20. Heat dissipation blades; 21. Driven gear; 22. Rack; 23. 24. Guide assembly; 25. Lifting assembly; 26. Lifting column; 27. Energy absorption device; 28. Limiting device; 29. ​​Storage tank; 30. Paraffin drive block; 31. Ejection piston; 32. Push block; 33. Base plate; 34. Energy absorption spring; 35. Sliding sleeve; 36. Sliding rod; 37. Top plate; 38. Retaining ring; 39. Deflection plate; 40. Limiting wedge block; 41. Sliding block; 42. Sliding groove; 43. Limiting spring; 44. U-shaped frame; 45. Diamond guide groove; 46. Guide column. Detailed Implementation

[0034] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] In one embodiment, see Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 6 An engineering security monitoring device includes a cylindrical shell 1. An air inlet 11 and an air outlet 12 are respectively located at both ends of the cylindrical shell 1. An electrical component 4 is housed inside the air outlet 12. The electrical component 4 is the core working part of the security monitoring device and includes an image acquisition module, a data processing chip, a power supply module, and a storage module. Specifically, the power supply module can be a PoE power supply module, allowing the entire monitoring device to achieve data transmission and power supply simultaneously by connecting only one data cable during installation. As a variation, a solar panel can be installed on the outer wall of the cylindrical shell 1, and an energy storage device and a wireless communication module can be integrated inside the electrical component 4 to achieve wireless connection or 5G communication, eliminating the need for a data cable and PoE power supply. For ease of description, the cylindrical shell 1 is defined as a rotating structure oriented left-right, with the air outlet 12 located at its right end. The left end of the cylindrical shell 1 has a tapered structure with a gradually decreasing diameter, and the air inlet 11 is located at the end of this tapered structure.

[0036] The heat-generating area of ​​the electrical component 4 (such as a data processing chip) is tightly fitted with a heat-conducting plate 7 to achieve efficient heat conduction. A heat-conducting strip 8 is fixedly connected to the side of the heat-conducting plate 7. In this embodiment, the heat-conducting strip 8 is preferably configured as a U-shaped structure to increase the heat-receiving area and improve the temperature response speed, while also providing a stable mounting base for subsequent internal mechanisms. It also includes a purely mechanically driven air intake regulation mechanism 10 and an active heat dissipation mechanism 9. Both mechanisms require no electricity, sensors, or control circuits, relying entirely on temperature changes to achieve automatic operation, thereby achieving a three-level adaptive temperature control effect of low-temperature sealing, medium-temperature ventilation, and high-temperature strong heat dissipation.

[0037] The air intake regulating mechanism 10 controls the opening or closing of the air intake 11 according to the temperature of the heat-conducting strip 8. When the temperature of the heat-conducting strip 8 reaches a first preset value, the air intake regulating mechanism 10 opens the air intake 11; when the temperature of the heat-conducting strip 8 is lower than the first preset value, the air intake regulating mechanism 10 closes the air intake 11. The active heat dissipation mechanism 9 includes a main shaft 19 rotatably connected to the side of the heat-conducting plate 7 and heat dissipation blades 20 disposed at the end of the main shaft 19. When the temperature of the heat-conducting strip 8 reaches a second preset value higher than the first preset value, the active heat dissipation mechanism 9 drives the main shaft 19 to rotate, and the heat dissipation blades 20 generate airflow toward the air outlet 12.

[0038] In one instance of this embodiment, please refer to Figure 3 and Figure 5 The air intake regulating mechanism 10 is used to control the opening or closing of the air intake 11 according to the temperature of the heat-conducting strip 8. Specifically, when the temperature of the heat-conducting strip 8 reaches a first preset value (45°C in this embodiment), the air intake regulating mechanism 10 opens the air intake 11, and when the temperature is below 45°C, the air intake 11 is closed.

[0039] The air intake adjustment mechanism 10 includes a fixed plate 13, a tightening rod 16, a plug 14, a tightening spring 15, a push plate 17, and a shape memory alloy component 18. The fixed plate 13 is fixedly connected to the inner wall of the left side of the outer shell 1, and a guide hole is provided in its middle. The tightening rod 16 slides through the guide hole to achieve axial movement guidance. The left end of the tightening rod 16 is fixedly connected to the plug 14, the shape of which matches the inner wall shape of the air intake 11, and is used to completely seal the air intake 11. The tightening spring 15 is sleeved on the tightening rod 16. The tightening spring 15 is located between the plug 14 and the fixed plate 13 and is normally in a compressed state, continuously applying a tightening force to the plug 14 in the direction of the air intake 11, so that the plug 14 remains closed when no external force is applied. The end of the tightening rod 16 away from the air intake 11 is fixedly connected to the push plate 17. A shape memory alloy component 18 is fixedly installed at the end of the heat-conducting strip 8. In this embodiment, a Ni-Ti series shape memory alloy is selected, and its phase transformation temperature is set to 45°C.

[0040] Its working principle is as follows:

[0041] When electrical component 4 is under low load and the temperature of heat-conducting strip 8 is below 45°C, shape memory alloy component 18 remains in a contracted state. At this time, the top spring 15 pushes the plug 14 to press against the air inlet 11, and the equipment is in a sealed and protected state.

[0042] When the electrical component 4 continues to operate, causing the temperature to rise, and the temperature of the heat-conducting strip 8 reaches or exceeds 45°C, the shape memory alloy component 18 elongates due to heat, generating a stable thrust that pushes the push plate 17 away from the air inlet 11. The clamping rod 16 then drives the plug 14 to retract against the elastic force of the clamping spring 15, opening the air inlet 11. External cold air then enters the interior of the outer shell 1, forming natural convection cooling. The higher the temperature, the greater the elongation of the shape memory alloy component 18, and the greater the opening width of the air inlet 11.

[0043] After the equipment cools down, the temperature of the heat-conducting strip 8 drops below 45°C, and the shape memory alloy part 18 cools and shrinks. The tightening spring 15 pushes the plug 14 to reset, closing the air inlet 11 again and restoring the sealing state.

[0044] In one instance of this embodiment, please refer to Figures 6-10 The active heat dissipation mechanism 9 is used to automatically activate forced convection heat dissipation when the temperature rises further. Its activation temperature is set to a second preset value (60°C in this embodiment), which is higher than the first preset value, so as to achieve graded temperature control.

[0045] The active heat dissipation mechanism 9 includes a main shaft 19, heat dissipation blades 20, a driven gear 21, a rack 22, and a lifting assembly 24. The main shaft 19 is rotatably connected to the side of the heat-conducting plate 7 via bearings or bushings, and the heat dissipation blades 20 are fixedly mounted on the end of the main shaft 19. The driven gear 21 is fixedly mounted in the middle of the main shaft 19. The rack 22 meshes with the driven gear 21 to drive the main shaft 19 to rotate.

[0046] The lifting assembly 24, located at the U-shaped bend of the heat-conducting strip 8, is the core of the high-temperature drive mechanism of this invention, utilizing the thermal expansion of paraffin wax for purely mechanical actuation. The lifting assembly 24 includes a storage tank 28, a paraffin wax driving block 29, an ejector piston 30, an energy-absorbing device 26, a limiting device 27, and a guide assembly 23. The storage tank 28 is fixedly connected to the U-shaped bend of the heat-conducting strip 8 to ensure uniform heating and rapid response. The storage tank 28 is sealed and filled with the paraffin wax driving block 29, and the selected paraffin wax exhibits a volume change rate of 15% to 20% between its solid and liquid states. The storage tank 28 has a rotating structure, with a large-diameter cylindrical container at the bottom and a small-diameter guide tube at the top. The ejector piston 30 is slidably connected within the guide tube and seals against the inner wall of the storage tank 28 to prevent paraffin wax leakage. Above the ejector piston 30, the energy-absorbing device 26 and the lifting column 25 are sequentially arranged. The top of the lifting column 25 is fixedly connected to the aforementioned rack 22.

[0047] In one instance of this embodiment, please refer to Figures 6-10 The energy-absorbing device 26 absorbs the kinetic energy of the slowly rising ejector piston 30 and stores it as elastic potential energy. Once a set condition is met, the energy is rapidly released, allowing the lifting column 25 to gain sufficient kinetic energy to move upwards and drive the cooling blades 20 to rotate. The energy-absorbing device 26 includes a base plate 32, an energy-absorbing spring 33, a sliding sleeve 34, a sliding rod 35, and a top plate 36. The base plate 32 is slidably connected to the inner wall of the storage tank 28. The sliding sleeve 34 is fixed to the middle of the upper surface of the base plate 32, and the sliding rod 35 is slidably connected to the upper part of the sliding sleeve 34. The top plate 36 is fixed to the upper end of the sliding rod 35. The energy-absorbing spring 33 is sleeved on the outside of the sliding sleeve 34 and the sliding rod 35 for energy storage and buffering. A push block 31 is fixed to the side of the lifting column 25, and the push block 31 abuts against the top plate 36 to achieve force transmission. The inner wall of the storage tank 28 is also fixed with a retaining ring 37. The inner diameter of the retaining ring 37 is smaller than the outer diameter of the bottom plate 32 and the top plate 36. It is used to limit the maximum stroke of the bottom plate 32 and ensure structural safety.

[0048] The limiting device 27 is used to control the release timing of the energy-absorbing device 26, ensuring that the heat dissipation blades 20 are only driven to rotate when the temperature reaches the second preset value (60℃), thus avoiding false triggering at low temperatures. The limiting device 27 includes a slide 41, a slider 40, a limiting spring 42, a limiting wedge block 39, and a deflection plate 38. The slide 41 is fixedly connected to the end of the storage tank 28. The slider 40 is slidably connected to the left side of the slide 41, and the limiting spring 42 is disposed inside the slide 41. The limiting spring 42 drives the slider 40 to move to the left. A limiting wedge block 39 is fixed to the left side of the slider 40, and its lower left side is inclined. The top of the top plate 36 is rotatably connected to the deflection plate 38, which can deflect at a small angle around the axis of rotation.

[0049] Its working principle is as follows:

[0050] When the heat-conducting strip 8 heats up, the paraffin drive block 29 expands due to heat, pushing the ejector piston 30 upward. The ejector piston 30 then pushes the base plate 32, compressing the energy-absorbing spring 33 to store energy. During this process, the deflection plate 38 rises with the top plate 36. When it rises to the set position, the end of the horizontal deflection plate 38 abuts against the limiting wedge block 39.

[0051] When the temperature continues to rise to 60℃, the thrust generated by the continued expansion of the paraffin drive block 29 acts on the deflection plate 38 through the top plate 36. The deflection plate 38 pushes the slider 40 and the limit wedge block 39 to the right along the inclined surface of the limit wedge block 39, compressing the limit spring 42. When the deflection plate 38 passes the apex of the limit wedge block 39, the limit wedge block 39 disengages from the deflection plate 38. At this time, the energy-absorbing spring 33 instantly releases its stored energy, pushing the top plate 36 to move upward rapidly. The top plate 36 drives the lifting column 25 to move upward through the push block 31. By adjusting the inclined angle of the limit wedge block 39 or the elastic modulus of the limit spring 42, the value of the second preset temperature can be precisely set.

[0052] Conversely, when the temperature drops, the paraffin drive block 29 contracts, and the ejector piston 30 descends. The top plate 36 moves downward under the influence of gravity. When the deflector plate 38 falls to the position of the limit wedge block 39, it can adaptively deflect upward, thereby passing over the limit wedge block 39 and completing the reset.

[0053] In one instance of this embodiment, please refer to Figures 6-10 The guide assembly 23 is used to control the movement trajectory of the lifting column 25, ensuring precise engagement or disengagement of the rack 22 and driven gear 21, and avoiding jamming. The guide assembly 23 includes a U-shaped frame 43, a diamond-shaped guide groove 44, and a guide post 45. The U-shaped frame 43 is fixedly connected to the rear wall of the storage tank 28. Diamond-shaped guide grooves 44 are provided on the inner walls of the front and rear sides of the U-shaped frame 43, and the guide post 45 is slidably connected in the diamond-shaped guide groove 44, with the middle part of the guide post 45 fixedly connected to the lower end of the lifting column 25.

[0054] The diamond-shaped guide groove 44 is designed as follows: the left vertical groove is higher than the right vertical groove, and there are inclined grooves at the top and bottom connecting the left and right vertical grooves. Its motion logic is as follows:

[0055] When the guide post 45 moves upward along the right vertical groove, the rack 22 and the driven gear 21 are in the same vertical plane, meshing and driving the cooling fins 20 to rotate. When the guide post 45 reaches the top, it slides along the top inclined groove to the left vertical groove. At this time, under the action of gravity, the guide post 45 moves downward along the left vertical groove, and the rack 22 and the driven gear 21 are disengaged. When the guide post 45 reaches the bottom, it slides back down along the bottom inclined groove to the bottom of the right vertical groove, completing a complete drive-reset cycle.

[0056] In one instance of this embodiment, please refer to Figure 1 and Figure 3 To further improve heat dissipation efficiency, a first heat dissipation fin 5 is fixedly installed between the outer wall of the electrical component 4 and the inner wall of the cylindrical shell 1. The first heat dissipation fin 5 is made of a high thermal conductivity material such as aluminum alloy or copper alloy and is tightly fitted to the shell of the electrical component 4 to quickly conduct the heat generated during operation to the internal space of the cylindrical shell 1. At the same time, a bottom shell 3 is fixedly connected to the cylindrical shell 1 and fitted around the heat conduction strip 8. A second heat dissipation fin 6 is provided on the side of the heat conduction strip 8, extending to the outside of the bottom shell 3, to directly dissipate heat to the external environment. A bracket 2 is provided at the bottom of the cylindrical shell 1, through which the entire monitoring device can be fixed to a wall or other installation location, and a gap is left between the cylindrical shell 1 and the installation surface to facilitate heat dissipation of the second heat dissipation fin 6.

[0057] Based on the above structure, the working process of this device is as follows:

[0058] 1. Low-temperature operating conditions: The temperature of the heat-conducting strip 8 is below 45℃. The air inlet 11 is blocked by the plug 14, and the device is in a sealed state. The heat generated by the electrical component 4 is conducted to the second heat dissipation fin 6 through the heat-conducting plate 7 and the heat-conducting strip 8, and is passively dissipated to the external environment.

[0059] 2. Medium-temperature operation: The temperature of the heat-conducting strip 8 rises to between 45°C and 60°C. The shape memory alloy part 18 expands due to heat, opening the air inlet 11. External cold air enters the outer shell 1 and comes into contact with the first heat dissipation fins 5, forming natural convection, or the internal hot air flows out through the air inlet 11, improving heat dissipation efficiency. At the same time, the paraffin drive block 29 in the lifting assembly 24 continues to expand, pushing the ejector piston 30 upward and compressing the energy-absorbing spring 33 to store energy, but it has not yet been triggered to release due to the limiting device 27.

[0060] 3. High-temperature operation: The temperature of the heat-conducting strip 8 exceeds 60℃. The limit device 27 releases, and the energy-absorbing spring 33 instantly releases its stored energy, pushing the lifting column 25 to rise rapidly. The rack 22 drives the driven gear 21 and the main shaft 19 to rotate, and the heat dissipation blades 20 begin to work. The rotating heat dissipation blades 20 generate a directional forced airflow from the air inlet 11 to the air outlet 12, which greatly accelerates the heat exchange inside the outer shell 1 of the cylinder and achieves efficient cooling. It should be noted that the starting torque of the heat dissipation blades 20 is provided by the instantaneous release of the energy-absorbing spring 33 to overcome the static friction in its stationary state; once the blades start to rotate, the subsequent continuous rotation can be maintained by the hot airflow driven by the temperature difference between the inside of the equipment and the external environment, achieving a "self-continuous" effect after startup.

[0061] 4. Cooling Operation: When the load on electrical component 4 decreases or the ambient temperature drops, the temperature of the heat-conducting strip 8 gradually decreases. The paraffin drive block 29 contracts, the ejector piston 30 descends, the energy absorption device 26 and the lifting column 25 reset under gravity, and the limit device 27 relocks. When the temperature further drops below 45℃, the shape memory alloy part 18 contracts, the plug 14 re-seals the air inlet 11, the device returns to a low-temperature sealed state, and the heat dissipation blades 20 stop rotating.

[0062] This invention provides an engineering security monitoring device that achieves graded temperature control—"low-temperature sealing, medium-temperature ventilation, and high-temperature strong heat dissipation"—through a purely mechanical adaptive structure. This significantly improves heat dissipation efficiency while ensuring protection against extreme environments. All mechanisms are driven by the physical properties of the materials, requiring no electricity, sensors, or control circuits, thus completely eliminating the risk of electronic failure and ensuring extremely high reliability. The energy storage and release-type start-up design cleverly overcomes the static friction of the blades, ensuring reliable triggering of forced heat dissipation at high temperatures. The device is simple in structure and easy to install, making it particularly suitable for outdoor scenarios without power supply or where wiring is difficult.

[0063] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within the present invention.

Claims

1. An engineering security monitoring device, comprising a cylindrical shell, with an air inlet and an air outlet respectively provided at both ends of the cylindrical shell, and an electrical component placed inside the air outlet, characterized in that, A heat-conducting plate is provided on the side of the electrical component near the center of the outer shell. The heat-conducting plate is thermally connected to the heat-generating part of the electrical component. A heat-conducting strip is provided on the side of the heat-conducting plate. It also includes an active heat dissipation mechanism and an air intake adjustment mechanism. An air intake regulating mechanism is used to control the opening or closing of the air intake port according to the temperature of the heat-conducting strip. When the temperature of the heat-conducting strip reaches a first preset value, the air intake regulating mechanism opens the air intake port; when the temperature of the heat-conducting strip is lower than the first preset value, the air intake regulating mechanism closes the air intake port. The active heat dissipation mechanism includes a main shaft rotatably connected to the side of the heat-conducting plate and heat dissipation blades disposed at the end of the main shaft. When the temperature of the heat-conducting strip reaches a second preset value higher than the first preset value, the active heat dissipation mechanism drives the main shaft to rotate, and the heat dissipation blades generate airflow toward the air outlet.

2. The engineering security monitoring device according to claim 1, characterized in that, The heat-conducting strip has a U-shaped structure. The active heat dissipation mechanism includes a lifting component disposed at the bent part of the heat-conducting strip. A lifting column is disposed on the side of the lifting component, and a rack is disposed at the end of the lifting column. A driven gear that cooperates with the rack is disposed in the middle of the main shaft. When the temperature of the heat-conducting strip reaches the second preset value, the lifting component pushes the lifting column to move toward the main shaft, and the rack drives the driven gear to rotate.

3. The engineering security monitoring device according to claim 2, characterized in that, The lifting assembly includes a storage tank fixedly connected to the heat-conducting strip. The storage tank is filled with a paraffin drive block. An ejector piston is slidably connected to the side of the storage tank near the main shaft. The ejector piston moves with the thermal expansion of the paraffin drive block. The lifting assembly also includes an energy-absorbing device and a limiting device. The energy-absorbing device is used to absorb the kinetic energy of the ejector piston rising. The limiting device is used to control the energy-absorbing device to release potential energy to drive the lifting column to move. The outer wall of the storage tank is provided with a guide assembly for guiding the movement direction of the lifting column.

4. The engineering security monitoring device according to claim 3, characterized in that, The energy-absorbing device includes a bottom plate slidably connected to the inner wall of the storage tank. A sliding sleeve is provided on the side of the bottom plate near the main shaft. A sliding rod is slidably connected inside the sliding sleeve. A top plate is fixedly connected to the end of the sliding rod. An energy-absorbing spring is provided between the top plate and the bottom plate. A push block that abuts against the top plate is provided on the side of the lifting column. A retaining ring is provided on the inner wall of the storage tank. The inner diameter of the retaining ring is smaller than the outer diameter of the bottom plate and the top plate.

5. The engineering security monitoring device according to claim 4, characterized in that, The limiting device includes a slide groove fixedly connected to the end of the storage tank, a slider slidably connected in the slide groove, a limiting spring provided in the slide groove to drive the slider to move toward the storage tank, a limiting wedge block provided on the side of the slider near the storage tank, and a deflection plate that cooperates with the limiting wedge block rotatably connected to the top of the top plate.

6. The engineering security monitoring device according to claim 3, characterized in that, The guiding assembly includes a U-shaped frame fixedly connected to the storage tank. The inner wall of the U-shaped frame is provided with a diamond-shaped guide groove. A guide post is slidably connected in the diamond-shaped guide groove. The middle part of the guide post is fixedly connected to the end of the lifting post. When the guide post is located in the vertical groove of the diamond-shaped guide groove near the heat-conducting plate, the rack and the driven gear are in the same vertical plane. When the guide post is located in the vertical groove of the diamond-shaped guide groove away from the heat-conducting plate, the rack and the driven gear are offset from each other.

7. The engineering security monitoring device according to claim 1, characterized in that, The air intake adjustment mechanism includes a fixed plate fixedly connected to the inner wall of the outer shell of the cylinder. A tensioning rod is slidably connected to the middle of the fixed plate. A plug that cooperates with the air intake is provided at one end of the tensioning rod near the air intake. A tensioning spring is provided between the plug and the fixed plate to drive the plug to move toward the air intake. A push plate is provided at the other end of the tensioning rod away from the air intake. A shape memory alloy part is provided at the end of the heat-conducting strip. When the temperature of the shape memory alloy part reaches the first preset value, it expands and pushes the push plate, causing the tensioning rod to move against the elastic force of the tensioning spring, thereby driving the plug away from the air intake. When the temperature of the shape memory alloy part is lower than the first preset value, the shape memory alloy part contracts, and the tensioning spring drives the plug to reset to close the air intake.

8. The engineering security monitoring device according to claim 1, characterized in that, The outer wall of the electrical component is provided with a first heat dissipation fin that is fixedly connected to the inner wall of the cylindrical shell. The outer side of the heat-conducting strip is fitted with a bottom shell that is fixedly connected to the cylindrical shell. The side of the heat-conducting strip is provided with a second heat dissipation fin that extends to the outside of the bottom shell. The bottom of the cylindrical shell is provided with a bracket.

Images