Inductor protection shell

Abstract

The utility model provides an inductor protection shell, comprising a protection inner shell used for fixedly installing an inductor; a protective housing; the protective shell is sleeved outside the protective inner shell; the at least one heat dissipation device is located in a space between the protective inner shell and the protective outer shell; the heat dissipation device comprises a negative pressure generation device, and an air inlet of the negative pressure generation device leads to the outside of the protective shell; and the radiating fins are arranged around the negative pressure generating device, and the hot air is guided and discharged through the radiating fins. Through a double-layer composite structure and in combination with the heat dissipation device, the technical problem that the inductor is easy to fail in a high-temperature industrial environment is comprehensively solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of industrial equipment protection, specifically, relate to a sensor protection shell. BACKGROUND

[0002] In the production application scene of double-tray muffle furnace, the equipment needs to maintain high-temperature operation state for a long time, and the temperature in the furnace can reach 900 DEG C. In the production feeding link, the furnace opening needs to be opened to complete the material conveying, at this time, the temperature of the furnace opening area is still as high as 200 DEG C. The in-place sensor at the furnace opening is a key detection component of the equipment operation, which needs to be continuously exposed to the high-temperature environment.

[0003] Under the prior art, due to the lack of effective high-temperature protection measures for the sensor, the high temperature of the furnace opening when the muffle furnace is opened will directly act on the sensor, which is easy to cause the sensor to malfunction frequently due to high-temperature damage after long-term use. The sensor malfunction can cause the equipment to alarm frequently, which not only interrupts the normal production process, but also seriously affects the overall production progress, and increases the replacement frequency and operation and maintenance cost of the sensor. SUMMARY

[0004] In view of the problems of the sensor in the prior art in the high-temperature environment, the present application provides a sensor protection shell, which can make the sensor still operate stably in a high-temperature environment (such as the 200 DEG C high temperature of the muffle furnace opening), thereby prolonging the service life of the sensor, reducing the failure frequency, and ensuring the continuity of production.

[0005] To achieve the above object and other related objects, the utility model provides a sensor protection shell which comprises:

[0006] A protective inner shell is used for fixedly installing a sensor.

[0007] A protective outer shell is sleeved outside the protective inner shell.

[0008] At least one heat dissipation device is located in the space between the protective inner shell and the protective outer shell. The heat dissipation device comprises a negative pressure generating device, an air inlet of the negative pressure generating device being open to the outside of the protective outer shell, and a heat dissipation fin being arranged around the negative pressure generating device, hot air adsorbed by the negative pressure generating device being guided and discharged through the heat dissipation fin.

[0009] Optionally, the protective inner shell comprises a top plate and a bottom plate arranged oppositely, and a side plate connecting the top plate and the bottom plate, the top plate and / or the bottom plate is provided with a sensor placing hole, and the top plate and / or the bottom plate is provided with a fixing piece to fix the sensor.

[0010] Optionally, the protective outer shell is provided with an opening on the two side plates arranged oppositely, and a fixing piece can slide through the opening to fix the sensor from the side.

[0011] Optionally, the top plate and / or the bottom plate is provided with a fixing sheet groove on the side facing the inductor.

[0012] Optionally, at least two heat dissipation devices are oppositely arranged on two sides of the protective inner shell.

[0013] Optionally, the negative pressure generating device is a Bernoulli suction disc.

[0014] Optionally, the protective outer shell has a double-layer structure, comprising a metal base layer and a heat insulation layer covering the metal base layer.

[0015] Optionally, the heat dissipation device is arranged between the third side plate and the fourth side plate of the protective inner shell and the protective outer shell.

[0016] Optionally, the protective inner shell and the heat dissipation device are made of high-temperature-resistant engineering plastic.

[0017] Optionally, the heat dissipation fins are arranged in a spiral structure around the negative pressure generating device.

[0018] As described above, the inductor protection shell has at least the following beneficial technical effects:

[0019] The inductor protection shell provided by the application adopts a double-layer structure of a protective inner shell and a protective outer shell, the outer layer can block external high-temperature radiation and conduction through a high-temperature-resistant material, the inner layer directly wraps the inductor through a temperature-resistant material, forming double protection; the protective inner shell is fixed through a top screw and a lateral sliding fixing sheet, limiting the position of the inductor; the heat dissipation device is designed based on the Bernoulli effect, when cooling gas is introduced into the negative pressure generating device, local negative pressure is formed on the side close to the protective inner shell, actively absorbing hot air around the inner shell, the spiral heat dissipation fins prolong the mixing path of the hot air and the cooling gas, strengthening heat exchange, greatly improving the heat dissipation efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 The structure schematic diagram of the inductor protection shell provided by the application is shown.

[0021] Figure 2 The structure schematic diagram of the inductor protection shell provided by the application is shown. Figure 1 The structure schematic diagram of the inductor protection shell provided by the application is shown.

[0022] Figure 3 The structure schematic diagram of the inductor protection shell provided by the application is shown. Figure 2 The front view of the inductor protection shell provided by the application is shown.

[0023] Figure 4 The front view of the inductor protection shell provided by the application is shown. Figure 2 The side view of the inductor protection shell provided by the application is shown. Figure 5 The side view of the inductor protection shell provided by the application is shown. Figure 2A top view of the protective inner shell.

[0024] Figure 6 A front view of the protective inner shell. Figure 1 A structural schematic view of the heat dissipation device.

[0025] Figure 7 A front view of the protective inner shell. Figure 6 A front view of the heat dissipation device.

[0026] Figure 8 A front view of the protective inner shell. Figure 6 A side view of the heat dissipation device.

[0027] Figure 9 A front view of the protective inner shell. Figure 6 A top view of the heat dissipation device.

[0028] Figure 10 A front view of the protective inner shell. Figure 1 A structural schematic view of the protective outer shell.

[0029] Figure 11 A front view of the protective inner shell. Figure 10 A front view of the protective outer shell.

[0030] Figure 12 A front view of the protective inner shell. Figure 10 A side view of the protective outer shell.

[0031] Figure 13 A front view of the protective inner shell. Figure 10 A top view of the protective outer shell.

[0032] Reference signs: 1, inductor; 2, protective inner shell; 21, top plate; 22, bottom plate; 23, inductor placement hole; 231, fixing piece; 24, side plate; 241, first side plate; 242, second side plate; 243, third side plate; 244, fourth side plate; 25, opening; 26, fixing piece; 27, fixing piece groove; 28, fixing hole; 3, heat dissipation device; 31, negative pressure generating device; 311, air inlet; 312, air outlet; 32, heat dissipation fin; 33, bolt hole; 4, protective outer shell; 41, side wall; 411, first side wall; 412, second side wall; 413, third side wall; 414, fourth side wall; 42, outer shell top plate; 43, outer shell placement hole; 44, air inlet exposure hole; 45, protection device; 451, through hole. DETAILED DESCRIPTION

[0033] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model.

[0034] It should be noted that the illustrations provided in this embodiment are only schematic representations of the basic concept of this utility model. Although the illustrations only show components related to this utility model and are not drawn according to the actual number, shape and size of the components, the shape, quantity, positional relationship and proportion of each component can be arbitrarily changed under the premise of realizing the technical solution of this utility model, and the layout of the components may also be more complex.

[0035] This embodiment provides a sensor protective case, such as Figure 1 As shown, the sensor protective housing in this embodiment includes a protective inner shell 2 for fixing and mounting the sensor 1; a protective outer shell 4; sleeved on the outside of the protective inner shell 2; and at least one heat dissipation device 3 located in the space between the protective inner shell 2 and the protective outer shell 4. The heat dissipation device 3 includes: a negative pressure generating device 31, the air inlet 311 of which opens to the outside of the protective outer shell 4; and heat sinks 32 disposed around the negative pressure generating device 31, through which the hot air adsorbed by the negative pressure generating device 31 is guided and discharged. When the cooling airflow enters through the air inlet 311, the cooling airflow flows at high speed within the negative pressure generating device 31, generating a negative pressure zone at the adsorption end of the negative pressure generating device 31 (i.e., the side near the protective inner shell 2), and the hot air is guided and discharged through the heat sinks 32.

[0036] like Figure 2 The diagram shows a schematic of the protective inner shell provided in this embodiment. The protective inner shell 2 includes a top plate 21 and a bottom plate 22 disposed opposite to each other, and a side plate connecting the top plate 21 and the bottom plate 22. The top plate 21 and / or the bottom plate 22 are provided with a sensor placement hole 23, and a fixing member 231 is provided on the top plate 21 and / or the bottom plate 22 of the sensor placement hole 23 to fix the sensor 1. Generally, the sensor 1 is a cuboid or cylindrical structure. In this embodiment, the sensor 1 is shown as a cylindrical structure. The sensor placement hole 23 is a circular hole, and the diameter of the sensor placement hole 23 is larger than the diameter of the sensor 1 by about 0.5 mm to 2 mm, so that the sensor 1 can be placed inside the protective inner shell 2, avoiding damage caused by direct friction between the hole wall and the outer shell of the sensor 1, and not obstructing the detection area of ​​the sensor 1 (including the signal transmitting end and the receiving end). Specifically, the sensor placement hole 23 is located at the center of the top plate 21; optionally, the bottom plate 22 is also provided with a sensor placement hole 23.

[0037] Generally, conventional sensors 1 are suitable for use in the sensor protective housing provided in this application, such as photoelectric sensors (diffuse reflection type, through-beam type), proximity sensors (inductive type, capacitive type), temperature sensors (thermocouple sensors, infrared temperature probes), fiber optic sensors, etc.

[0038] A fixing member 231 is provided on the top plate 21 and / or bottom plate 22 of the sensor placement hole 23 for fixing the sensor 1. Optionally, the fixing member 231 includes various fixing members such as snap-fit ​​fixing and threaded sleeve fixing. In this embodiment, 2 to 4 evenly distributed threaded holes are opened around the sensor placement hole 23. The fixing screw can be inserted into the threaded hole through the thread. After the sensor 1 is placed in the protective inner shell 2, the fixing screw is tightened to fix the sensor 1. The tightness of the fixing screw is adjustable to accommodate sensors of different diameters, improving the size compatibility of the protective inner shell 2.

[0039] Specifically, the protective inner shell 2 in this embodiment includes four opposing side plates 24; as Figure 4 As shown, it is displayed as Figure 2 The diagram shows a side view of the protective inner shell; openings 25 are provided on any two opposing side plates 24, through which a fixing piece 26 slidably passes to fix the sensor 1 from the side. Specifically, the side plates 24 include a first side plate 241 and a second side plate 242, and a third side plate 243 and a fourth side plate 244, which are arranged opposite each other. The openings 25 are located at the relative positions of the first side plate 241 and the second side plate 242.

[0040] The fixing piece 26 is configured as a thin plate with a certain thickness, such as... Figure 5 As shown, it is displayed as Figure 2 The top view of the protective inner shell is shown; by inserting the fixing piece 26 into the protective inner shell 2 through the openings of the first side plate 241 and the second side plate 242 respectively, the sensor 1 can be further fixed to prevent the sensor 1 from moving laterally.

[0041] Specifically, a fixing plate groove 27 is provided on the side of the top plate 21 and / or the bottom plate 22 facing the sensor 1. For example... Figure 1 As shown, in this embodiment, both the top plate 21 and the bottom plate 22 are provided with fixing plate grooves 27. Specifically, the width of the fixing plate groove 27 matches that of the fixing plate 26 to ensure stable sliding of the fixing plate 26. Generally, the width of the sensor 1 is between 0.3 cm and 1 cm, the thickness of the fixing plate 26 is between 0.3 cm and 1.2 cm, and the width of the fixing plate groove 27 is between 0.3 cm and 1.2 cm. Optionally, the width of the protective inner shell 2 is between 3 and 4 cm, and the length is between 10 and 15 cm. The length of the fixing plate 26 is between 6 and 7 cm.

[0042] like Figure 3as shown, shown as Figure 2 The front view of the protection inner shell structure is shown; the protection inner shell 2 includes a plurality of fixing holes 28, which include bolt holes, and the protection inner shell 2 is fixedly connected with the heat dissipation device 3 and the protection outer shell 4 through bolts. In the embodiment, the fixing holes 28 are arranged on the eight corners of the protection inner shell 2. The depth of the fixing holes 28 is equal to the thickness of the side plates 24 of the protection inner shell 2. Generally, the material of the protection inner shell 2 includes high-performance engineering plastics (polyimide, PI; polyether ether ketone, PEEK), ceramic materials, and metals. In the embodiment, the protection inner shell 2 is made of PEEK material with good thermal stability, which can generally reach 240°C and is not easy to deform in a long-time high-temperature environment.

[0043] Please continue to refer to Figure 1 The inductor protection shell provided in the embodiment includes at least one heat dissipation device 3, which is arranged between the protection inner shell 2 and the protection outer shell 4. In the embodiment, two heat dissipation devices 3 are arranged, and the two heat dissipation devices 3 are arranged on the two sides of the protection inner shell 2, specifically, between the third side plate 243 and the fourth side plate 244 and the protection outer shell.

[0044] Figure 6 The structure schematic diagram of the heat dissipation device provided in the embodiment is shown; the heat dissipation device 3 includes a negative pressure generating device 31 and a heat dissipation fin 32. The heat dissipation device 3 is also provided with an air inlet 311 for connecting an external air source and introducing cooling gas, which is generally compressed air. The cooling gas is introduced into the inside of the negative pressure generating device 31 at high speed through the air inlet 311. When the cooling gas flows at high speed (generally ≥10 m / s) in the negative pressure generating device 31, according to Bernoulli effect, a local negative pressure area is formed at the suction end (the side close to the protection inner shell 2) of the negative pressure generating device 31. This negative pressure will have a suction effect on the hot air around the protection inner shell 2, so that the hot air is sucked into the negative pressure generating device 31 and mixed with the cooling gas, and then the mixed gas flow flows along the channel of the heat dissipation fin 32 and is finally discharged, thereby realizing the cooling of the protection inner shell and the inductor.

[0045] Generally, the negative pressure generating device 31 includes Bernoulli suction disc, ejector, and injector and the like. In the embodiment, the negative pressure generating device 31 is a Bernoulli suction disc. The heat dissipation fin 32 is arranged around the negative pressure generating device 31 to guide the hot air extracted from the side plate of the protection inner shell 2 to be discharged. Figure 7 as shown, shown as Figure 6The positive view of the heat dissipation device is shown. The adsorbed hot air is immediately mixed with the high-speed cooling main flow air stream inside the negative pressure generating device 31. A high-speed vortex air stream is formed around the negative pressure generating device 31, greatly enhancing the mixing efficiency and heat exchange intensity between the cold and hot air streams. The heat dissipation fins 32 in the embodiment are configured as spiral heat dissipation fins and are arranged around the negative pressure generating device 31. The mixed hot air stream is forced to flow through the heat dissipation fins 32 closely surrounding the negative pressure generating device 31 under the action of negative pressure. The spiral flow channel prolongs the air flow path, ensuring sufficient heat exchange. On the other hand, the centrifugal action smoothly guides the air stream and finally efficiently discharges it from the exhaust port 312 located on the side of the heat dissipation device 3 to the outside of the protective shell 4, thereby completely removing the heat from the system.

[0046] Specifically, the air inlet 311 of the heat dissipation device 3 is arranged on the side away from the protective inner shell 2. The air outlet 312 of the heat dissipation device 3 is adjusted and arranged according to the position of the air stream discharged by the heat dissipation fins 32. As shown in Figure 8 , it is shown that Figure 6 The side view of the heat dissipation device is shown. The air inlet 311 is arranged at the center of the side plate of the heat dissipation device 3 away from the protective inner shell 2. As shown in Figure 9 , it is shown that Figure 6 The top view of the heat dissipation device is shown. In combination with Figure 6 , the heat dissipation device 3 is provided with bolt holes 33 matching the protective inner shell 2 around it. The heat dissipation device 3 and the protective inner shell 2 can be fixedly connected using bolts. Specifically, the width of the protective inner shell 2 is between 3-5 cm.

[0047] Figure 10 It is shown that Figure 1The structure diagram of the protective shell is shown. The protective shell 4 is arranged outside the protective inner shell 2 and the heat dissipation device 3, and the protective shell 4 has four oppositely arranged side walls 41 and a shell top plate 42 connected with the side walls 41. Specifically, the side walls 41 include oppositely arranged first and second side walls 411 and 412, and oppositely arranged third and fourth side walls 413 and 414. The side walls 41 of the protective shell 4 are arranged correspondingly to the side plates 24 of the protective inner shell 2, specifically, the first side plate 241 faces the first side wall 411, the second side plate 242 faces the second side wall 412, the third side plate 243 faces the third side wall 413, and the fourth side plate 244 faces the fourth side wall 414. Specifically, the third side wall 413 and the fourth side wall 414 are provided with air inlet exposure openings 44 corresponding to the positions of the air inlets 311 of the heat dissipation device 3. The aperture size of the air inlet exposure openings 44 is greater than or equal to the size of the air inlets 311 of the heat dissipation device 3. So as to ensure that the cooling air flow can pass in without any obstruction. The shell top plate 42 is provided with a shell placement hole 43 corresponding to the inductor placement hole 23 of the protective inner shell 2. The size of the shell placement hole 43 provided on the shell top plate 42 is greater than or equal to the size of the inductor placement hole 23 of the protective inner shell 2, so as to ensure that the probe head of the inductor can be unobstructed and accurately perform its detection function, while avoiding the mechanical interference of the shell on the inductor.

[0048] Optionally, the protective shell 4 includes a shell bottom plate connected with the side walls 41. Optionally, the bottom of the protective shell 4 is not provided with a bottom plate, and is in a suspended and open state. This allows the protective shell to be directly installed on the equipment base, simplifies the structure, and provides a channel for the downward convection and radiation loss of heat inside the shell, forming an auxiliary heat dissipation path. Specifically, in this embodiment, the bottom of the protective shell 4 is not provided with a bottom plate. Specifically, a protection device 45 is arranged around the bottom of the protective shell 4, including structures such as bolts and buckles. In this embodiment, the protection device 45 is provided with a through hole 451, and the inductor protective shell is connected with the corresponding structure on the equipment base through the bolt passing through the through hole 451, so as to firmly lock the entire inductor protective shell, effectively prevent the components such as the protective inner shell 2 and the heat dissipation device 3 inside from sliding off from the bottom, and ensure the stability of the overall structure.

[0049] Specifically, the protective shell 4 is a double-layer structure, the inner layer is a metal base layer, and the outer layer is a heat insulation layer covering the metal base layer. Specifically, the material of the metal base layer includes aluminum alloy, stainless steel, and high-temperature-resistant alloy; preferably, the material of the aluminum alloy has low density, high strength, and relatively good thermal conductivity, which provides a solid mechanical support for the entire shell. The material of the heat insulation layer includes high-temperature-resistant ceramic fiber material (such as ceramic fiber felt and ceramic fiber cloth) and alumina (Al2O3) fiber. Preferably, the high-temperature-resistant ceramic fiber material has extremely low thermal conductivity and extremely high temperature resistance (temperature resistance ≥ 1200 ℃), can effectively reflect and block the high-temperature heat radiation emitted from the muffle furnace mouth, and can effectively isolate most of the heat, which is a key barrier to ensure that the inside is in a suitable temperature environment.

[0050] Specific use method of the inductor protection shell, the inductor 1 is placed in the protective inner shell 2 through the inductor placing hole 23, the height position of the inductor 1 is fixed by using the fixing part 231, the two slidable fixing sheets 26 are respectively inserted from the openings 25 on the first side plate 241 and the second side plate 242, and the fixing sheets 26 are pushed to fix the horizontal position of the inductor; the protective inner shell 2 with the installed inductor 1 is aligned with the heat dissipation device 3, the heat dissipation device 3 and the protective inner shell 2 are tightly connected by using bolts through the bolt holes 33 around the heat dissipation device 3 and the corresponding fixing holes 28 on the protective inner shell 2, an internal module integrating the inductor fixing and heat dissipation functions is formed, the above-mentioned assembled internal module is vertically loaded from the bottom opening of the protective outer shell 4, it is ensured that the third side plate 243 and the fourth side plate 244 of the protective inner shell 2 respectively face the third side wall 413 and the fourth side wall 414 of the protective outer shell 4, the air inlet 311 of the heat dissipation device 3 is aligned with the air inlet exposed opening 44 on the side wall of the protective outer shell 4, the inductor placing hole 23 on the top plate 21 of the protective inner shell 2 is centered with the shell placing hole 43 on the top plate 42 of the protective outer shell 4, it is ensured that the detection head of the inductor 1 is exposed without being blocked, then the external air source is connected to the air inlet 311 of the heat dissipation device 3 through the air pipe joint to provide power for the active heat dissipation system, and the entire inductor protection shell is placed on the predetermined installation position of the equipment base (such as near the muffle furnace mouth), the external air source is opened, and the heat dissipation device 3 starts to work.

[0051] The inductor protection shell provided in the application adopts a double-layer structure of a protective inner shell and a protective outer shell, the outer layer can block external high-temperature radiation and conduction by using high-temperature-resistant materials, and the inner layer directly wraps the inductor by using temperature-resistant materials to form double protection; the protective inner shell is fixed by a top screw and a lateral sliding fixing sheet to limit the position of the inductor; the heat dissipation device is designed based on the Bernoulli effect, when the cooling gas is introduced into the negative pressure generating device, a local negative pressure is formed on the side close to the protective inner shell, the hot air around the inner shell is actively adsorbed, the spiral-shaped heat dissipation fin prolongs the mixing path of the hot air and the cooling gas, and the heat exchange is strengthened, which greatly improves the heat dissipation efficiency.

[0052] The above embodiments only exemplarily illustrate the principles and effects of the present application, and are not used to limit the present application. Any person skilled in the art can modify or change the above embodiments without departing from the spirit and scope of the present application. Therefore, all equivalent modifications or changes completed by those skilled in the art without departing from the spirit and technical thought disclosed by the present application should be covered by the claims of the present application.

Claims

1. A sensor protective housing, characterized in that, include: Protective inner casing for securing the sensor; A protective outer shell is fitted over the outer surface of the inner protective shell; At least one heat dissipation device is located in the space between the inner protective shell and the outer protective shell; The heat dissipation device includes: a negative pressure generating device, wherein the air inlet of the negative pressure generating device is directed to the outside of the protective housing; A heat sink is disposed around the negative pressure generating device, and the hot air adsorbed by the negative pressure generating device is guided out through the heat sink.

2. The sensor protective housing according to claim 1, characterized in that, The protective inner shell includes a top plate and a bottom plate disposed opposite to each other, and a side plate connecting the top plate and the bottom plate. The top plate and / or the bottom plate are provided with sensor placement holes, and the top plate and / or the bottom plate are provided with fasteners to fix the sensor.

3. The sensor protective housing according to claim 2, characterized in that, The protective housing has openings on its two opposite side plates, through which a fixing piece can slide to fix the sensor from the side.

4. The sensor protective housing according to claim 3, characterized in that, The top plate and / or the bottom plate has a fixing plate groove on the side facing the sensor.

5. The sensor protective housing according to claim 1, characterized in that, It includes at least two of the aforementioned heat dissipation devices, which are disposed opposite to each other on both sides of the protective inner shell.

6. The sensor protective housing according to claim 1, characterized in that, The negative pressure generating device is a Bernoulli suction cup.

7. The sensor protective housing according to claim 1, characterized in that, The protective shell has a double-layer structure, including a metal base layer and a heat insulation layer covering the metal base layer.

8. The sensor protective housing according to claim 7, characterized in that, The heat dissipation device is disposed between the third and fourth side plates of the inner protective shell and the outer protective shell.

9. The sensor protective housing according to claim 1, characterized in that, The protective inner shell and the heat dissipation device are made of high-temperature resistant engineering plastics.

10. The sensor protective housing according to claim 1, characterized in that, The heat sink is arranged in a spiral structure around the negative pressure generating device.

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