A high energy density electric heater for aircraft testing

Abstract

The application relates to the technical field of electric heaters, in particular to a high-energy-density electric heater for aviation tests, which comprises a pressure-bearing pipe, a supporting seat is arranged at the bottom of the pressure-bearing pipe, a gas outlet cone pipe is coaxially arranged at one end of the pressure-bearing pipe, a maintenance cover plate is bolted at the other end of the pressure-bearing pipe, an air inlet is arranged on the maintenance cover plate, a pre-discharge piece is arranged on the pressure-bearing pipe, the pre-discharge piece is used for discharging air in the pressure-bearing pipe, an inner pipe is coaxially arranged in the pressure-bearing pipe, heat insulation supporting pieces for supporting and heat preservation are arranged between the pressure-bearing pipe and the inner pipe, a plurality of resistance pipes are arranged in the inner pipe, insulating pieces for fixing the resistance pipes are arranged on the inner pipe, a junction box is arranged outside the pressure-bearing pipe, the resistance pipes are electrically connected to the junction box, a filter screen plate is arranged at one end of the inner pipe close to the gas outlet cone pipe, an inner temperature sensor is arranged on the pressure-bearing pipe, a cooling pipe is arranged outside the pressure-bearing pipe, and cooling pieces for cooling the surface of the pressure-bearing pipe are arranged on the cooling pipe. The application has the effects of strong adaptability, stable use performance and safety.

Description

Technical Field

[0001] This application relates to the field of electric heater technology, and in particular to a high-energy-density electric heater for aviation testing. Background Technology

[0002] A resistance tube electric heater is an energy-saving industrial device that converts electrical energy into heat energy. Its core is a metal tube, which heats the gaseous medium (such as filtered air) flowing inside the tube. It is widely used in many scientific research and production laboratories in aerospace, weaponry, chemical industry, and universities.

[0003] Since electric heaters often need to heat air to high temperatures in scientific research and production laboratories, and also need to be easy to maintain, the parts of the electric heater that need to be disassembled are usually connected by bolts and spring washers, and the sealing is achieved by the machining precision of the contact surfaces of the parts to be connected.

[0004] However, when the electric heater stops working, gaps can easily appear between the disassembled parts due to thermal expansion and contraction. In research and production laboratories located in coastal cities, salt vapor in the environment can easily enter the electric heater, reducing the insulation effect of the internal resistance tube. Directly starting the electric heater in this situation can easily pose a safety risk. Furthermore, in a prolonged high-temperature environment, the salt vapor will evaporate and precipitate salt crystals, which will flow from the outlet of the electric heater into the next piece of equipment, seriously affecting the safety of subsequent equipment. At the same time, the large amount of heat accumulated inside the electric heater will raise the temperature of the heater shell through heat transfer. Excessive shell temperature will cause deformation, which will affect the internal structure, making subsequent disassembly and maintenance impossible. These are all shortcomings. Summary of the Invention

[0005] To improve the safety of electric heaters used in coastal cities, this application provides a high-energy-density electric heater for aviation testing.

[0006] This application provides a high-energy-density electric heater for aviation testing, which adopts the following technical solution: A high-energy-density electric heater for aviation testing includes a pressure-bearing tube with a support base at its bottom. One end of the pressure-bearing tube has a coaxially arranged exhaust cone, and the other end is bolted with a maintenance cover plate. An air inlet is provided on the maintenance cover plate. A pre-exhaust component is provided on the pressure-bearing tube to exhaust air from within it. An inner tube is coaxially arranged inside the pressure-bearing tube. A heat-insulating support for support and insulation is provided between the pressure-bearing tube and the inner tube. Several resistance tubes are arranged inside the inner tube, and an insulating component for fixing the resistance tubes is provided on the inner tube. A junction box is provided outside the pressure-bearing tube, and the resistance tubes are electrically connected to the junction box. A filter screen is provided at the end of the inner tube near the exhaust cone. An internal temperature sensor is provided on the pressure-bearing tube to detect the temperature inside the inner tube. A cooling tube is fitted over the pressure-bearing tube, and a cooling component is provided on the cooling tube to cool the surface of the pressure-bearing tube.

[0007] By adopting the above technical solution, before starting the electric heater, the worker first uses the pre-drainage component to discharge the salt vapor inside the pressure pipe, thereby ensuring the insulation performance of the resistance tube. Then, the resistance tube is energized, and the resistance tube will heat up rapidly. The internal temperature sensor detects the temperature inside the inner tube. At this time, the dry air flowing in from the air inlet will flow from the inside of the resistance tube to the filter plate. The filter plate will filter out the residual salt crystals in the air, and then flow through the mesh of the filter plate to the air outlet cone. During this process, the air will be heated up rapidly, and the heat insulation support component will prevent the heat generated on the resistance tube from being transferred to the pressure pipe, while the cooling component will continuously cool the surface of the pressure pipe, thereby reducing the possibility of damage to the pressure pipe.

[0008] Optionally, the pre-discharge component includes an exhaust pipe disposed at the top of the pressure-bearing pipe, an electric heating wire disposed at the bottom inner part of the pressure-bearing pipe, and a drain valve disposed at the bottom of the pressure-bearing pipe, the drain valve being close to the electric heating wire.

[0009] By adopting the above technical solution, the high temperature generated by the heating wire will heat the air inside the pressure pipe. At this time, the moisture in the air will be evaporated and discharged through the exhaust pipe, while the salt crystals that are evaporated and crystallized will remain at the bottom of the pressure pipe. When performing subsequent maintenance, the workers can discharge the salt crystals through the drain valve.

[0010] Optionally, the heat insulation support includes an inner guide tube coaxially disposed within the outlet cone tube. One end of the inner guide tube near the inner tube is sleeved on the filter screen plate. A middle partition tube is coaxially sleeved on the inner tube. One end of the middle partition tube near the filter screen plate is sleeved on the inner guide tube. A plurality of elastic support cone rings are sleeved on the middle partition tube. The plurality of support cone rings are arranged along the axial direction of the middle partition tube. The circumferential outer wall of the support cone ring is used to adhere to the circumferential inner wall of the pressure-bearing tube. A heat insulation layer is provided between the inner tube and the middle partition tube, between the middle partition tube and the pressure-bearing tube, and between the inner guide tube and the outlet cone tube.

[0011] By adopting the above technical solution, when the resistance tube is working, the supporting cone ring adapts to the deformation of the inner tube caused by heat through its own deformation. At the same time, the insulation layer greatly hinders the possibility of heat transfer to the pressure tube, so that heat can accumulate in the inner tube, thereby improving the heating effect on the flowing air.

[0012] Optionally, the insulating component includes a plurality of support plates evenly arranged along the axial direction of the inner tube. The outer circumferential wall of the support plate is attached to the inner circumferential wall of the inner tube. A plurality of ceramic tubes are detachably disposed on the support plate. Each ceramic tube corresponds to a resistor tube. The ceramic tube is slidably sleeved on the resistor tube. There is a gap between the inner circumferential wall of the ceramic tube and the outer circumferential wall of the resistor tube.

[0013] By adopting the above technical solution, the air from the air inlet can flow through the inside of the resistance tube as much as possible, thereby improving the heating effect of the air. At the same time, the ceramic tube not only ensures the insulation requirements of the resistance tube, but also reserves a safe distance for the thermal expansion of the resistance tube, thereby reducing the frequency and cost of maintenance.

[0014] Optionally, a detachable baffle cone is provided on the inspection cover. The baffle cone is located between the air inlet and the pressure pipe. The diameter of the baffle cone is larger than the diameter of the air inlet. There is a gap between the baffle cone and the air inlet. Several ventilation holes are provided on the baffle cone.

[0015] By adopting the above technical solution, the air from the air inlet is fully diffused into the pressure pipe, thereby allowing the air to flow evenly through multiple resistance tubes, thus improving the uniformity of air heating.

[0016] Optionally, the cooling component includes ventilation pipes disposed at both ends of the cooling pipe, and end rings are provided at both ends of the cooling pipe. The end rings are disposed on the pressure-bearing pipe, and a spiral strip is wound on the pressure-bearing pipe along its axial direction. The spiral strip is located between the pressure-bearing pipe and the cooling pipe. An external temperature sensor is disposed on the cooling pipe, and the external temperature sensor is used to detect the temperature between the pressure-bearing pipe and the cooling pipe.

[0017] By adopting the above technical solution, when the temperature detected by the external temperature sensor is higher than the design temperature, the external equipment injects air into one of the ventilation pipes. Under the action of the spiral wire, the air flows rapidly in the cooling pipe and carries away the heat from the surface of the pressure pipe, thereby reducing the temperature of the pressure pipe surface and reducing the possibility of the pressure pipe deforming due to overheating.

[0018] Optionally, the cooling pipe may have an integrally formed expansion ring protrusion.

[0019] Optionally, the resistive tube includes a front-end tube and a rear-end tube. The front-end tube is located between the inspection cover and the rear-end tube. The inner diameter of the rear-end tube is the same as that of the front-end tube, and the outer diameter of the rear-end tube is larger than that of the front-end tube. The internal temperature sensor is used to detect the temperature at the middle position of the rear-end tube.

[0020] By adopting the above technical solution, the heat generation of the resistance tube is mainly concentrated at the rear end of the tube, thereby making the air heating temperature value obtained by the internal temperature sensor more accurate.

[0021] In summary, this application includes at least one of the following beneficial technical effects: Before starting the electric heater, the workers first use the pre-drainage component to purge the salt vapor inside the pressure tube, thus ensuring the insulation performance of the resistance tube. Then, the resistance tube is energized, and it heats up rapidly. The internal temperature sensor detects the temperature inside the tube. At this time, dry air flowing in from the air inlet flows from the inside of the resistance tube to the filter plate. The filter plate filters out the residual salt crystals in the air, and then flows through the mesh of the filter plate to the exhaust cone. During this process, the air is rapidly heated, and the heat insulation support component prevents the heat generated on the resistance tube from being transferred to the pressure tube. The cooling component continuously cools the surface of the pressure tube, thereby reducing the possibility of damage to the pressure tube. The high temperature generated by the heating wire heats the air inside the pressure tube. At this time, the moisture in the air will be evaporated and discharged through the exhaust pipe, while the salt crystals that are evaporated and crystallized will remain at the bottom of the pressure tube. When performing subsequent maintenance, the workers can discharge the salt crystals through the drain valve. When the temperature detected by the external temperature sensor is higher than the design temperature, the external equipment injects air into one of the ventilation ducts. Under the action of the spiral wire, the air flows rapidly in the cooling duct and carries away the heat from the surface of the pressure pipe, thereby reducing the temperature of the pressure pipe surface and reducing the possibility of the pressure pipe deforming due to overheating. Attached Figure Description

[0022] Figure 1 This is a structural schematic diagram of an embodiment of this application.

[0023] Figure 2 This is a cross-sectional view used in the embodiments of this application to illustrate the positional relationship between the resistor tube, the cooling tube, and the inner tube.

[0024] Figure 3 yes Figure 2 Enlarged view of part A in the middle.

[0025] Figure 4 yes Figure 2 Enlarged view of section B.

[0026] Figure 5 yes Figure 2 Enlarged view of section C Figure 6 This is a cross-sectional view used in the embodiments of this application to illustrate the positional relationship between the resistor tube, the support plate, and the isolation ceramic.

[0027] Explanation of reference numerals in the attached drawings: 1. Pressure bearing pipe; 2. Support base; 3. Exhaust cone pipe; 4. Inspection cover plate; 5. Air inlet; 6. Pre-exhaust component; 61. Exhaust pipe; 62. Heating wire; 63. Drain valve; 7. Inner pipe; 8. Thermal insulation support component; 81. Inner guide pipe; 82. Middle septum pipe; 83. Support cone ring; 84. Insulation layer; 9. Resistance tube; 91. Front end tube; 92. Rear end tube; 10. Insulating component; 101 102. Support plate; 103. Ceramic tube; 11. Junction box; 12. Filter plate; 13. Internal temperature sensor; 14. Cooling pipe; 15. Cooling component; 151. Ventilation pipe; 152. End ring; 153. Spiral strip; 154. External temperature sensor; 16. Baffle cone; 17. Vent hole; 18. Expansion ring protrusion; 19. Insulating electrode tube; 20. Electrode plate; 21. Isolating ceramic; 22. Core insulation tube. Detailed Implementation

[0028] The following is in conjunction with the appendix Figure 1-6 This application will be described in further detail.

[0029] This application discloses a high-energy-density electric heater for aviation testing.

[0030] Reference Figure 1 , Figure 2 and Figure 3A high-energy-density electric heater for aviation testing includes a pressure tube 1, a support base 2 welded to the bottom of the pressure tube 1, an exhaust cone 3 integrally formed on one end of the pressure tube 1 and a maintenance cover plate 4 bolted to the other end, the diameter of the exhaust cone 3 gradually decreasing along the direction from the pressure tube 1 to the exhaust cone 3, and an air inlet 5 is provided on the maintenance cover plate 4.

[0031] Reference Figure 2 and Figure 3 A baffle cone 16 is bolted to the inspection cover plate 4. The baffle cone 16 is located between the air inlet 5 and the pressure pipe 1. The diameter of the baffle cone 16 gradually increases along the direction from the inspection cover plate 4 to the pressure pipe 1. The maximum outer diameter of the baffle cone 16 is larger than the diameter of the air inlet 5. There is a gap between the baffle cone 16 and the air inlet 5. Several ventilation holes 17 are opened on the baffle cone 16.

[0032] Reference Figure 2 A pre-discharge component 6 is arranged on the pressure pipe 1, which is used to discharge the air in the pressure pipe 1.

[0033] Reference Figure 1 and Figure 2 The pre-discharge component 6 includes an exhaust pipe 61 welded to the top of the pressure pipe 1, an electric heating wire 62 is bolted to the bottom of the inner part of the pressure pipe 1, the electric heating wire 62 is connected to the power source through a wire, and a drain valve 63 is bolted to the bottom of the pressure pipe 1, the drain valve 63 is close to the electric heating wire 62.

[0034] Before the electric heater is started, an external power source supplies power to the heating wire 62. The heating wire 62 generates a large amount of heat, which heats and evaporates the air in the pressure pipe 1. The heated and evaporated air is discharged through the exhaust pipe 61, while the salt crystals that are evaporated and crystallized remain at the bottom of the pressure pipe 1. During subsequent maintenance, the workers can discharge the salt crystals through the drain valve 63.

[0035] Reference Figure 2 An inner tube 7 is coaxially arranged inside the pressure pipe 1. A filter screen plate 12 is welded to one end of the inner tube 7 near the outlet cone pipe 3. The cross-section of the filter screen plate 12 is funnel-shaped, and several mesh holes with a diameter of 3mm are opened on the filter screen plate 12. A heat insulation support 8 for support and heat preservation is arranged between the pressure pipe 1 and the inner tube 7.

[0036] Reference Figure 2 and Figure 4 The heat insulation support 8 includes an inner guide pipe 81 coaxially welded inside the air outlet cone pipe 3. The diameter of the inner guide pipe 81 gradually decreases along the direction from the pressure pipe 1 to the air outlet cone pipe 3. One end of the inner guide pipe 81 near the inner pipe 7 is sleeved on the filter screen plate 12. There is a gap between the circumferential inner wall of the inner guide pipe 81 and the circumferential outer wall of the inner pipe 7.

[0037] Reference Figure 2 and Figure 4 A central septum 82 is coaxially sleeved on the inner tube 7. One end of the central septum 82 near the filter screen plate 12 is sleeved on the inner guide tube 81. There is a gap between the inner circumferential sidewall of the central septum 82 and the outer circumferential sidewall of the inner guide tube 81. The end of the central septum 82 away from the inner guide tube 81 is closed inward and welded to the inner tube 7.

[0038] Reference Figure 4 Multiple elastic support cone rings 83 are fitted on the partition tube 82. The cross-section of one side of the support cone ring 83 is V-shaped. The multiple support cone rings 83 are arranged along the axial direction of the partition tube 82. The outer circumferential wall of the support cone ring 83 is used to attach to the inner circumferential wall of the pressure-bearing tube 1.

[0039] Reference Figure 2 and Figure 4 A heat insulation layer 84 is arranged between the inner tube 7 and the middle septum 82, between the middle septum 82 and the pressure-bearing tube 1, and between the inner guide tube 81 and the outlet cone tube 3. The heat insulation layer 84 can be made of zirconium-containing ceramic fiber material in the existing technology.

[0040] Reference Figure 2 , Figure 5 and Figure 6 The inner tube 7 contains several resistance tubes 9, and the pressure-bearing tube 1 contains six junction boxes 11. Each junction box 11 is welded with three insulating electrode tubes 19. The resistance tubes 9 are divided into eighteen groups, and each group of resistance tubes 9 is connected in series. One end of each group of series-connected resistance tubes 9 is connected to the electrode tube with an electrode plate 20.

[0041] Reference Figure 6 An isolation ceramic 21 is arranged between each two adjacent electrode plates 20. The isolation ceramic 21 can be made of silicon nitride ceramic material in the prior art. The electrode plate 20 passes through the insulating electrode tube 19 and is connected to the junction box 11. The three sets of resistor tubes 9 corresponding to each junction box 11 are connected in a delta connection manner.

[0042] Reference Figure 2 and Figure 5 The resistor tube 9 includes a front tube 91 and a rear tube 92. The front tube 91 is located between the inspection cover plate 4 and the rear tube 92. The inner diameter of the rear tube 92 is the same as that of the front tube 91, and the outer diameter of the rear tube 92 is larger than that of the front tube 91.

[0043] Reference Figure 2 and Figure 5 An internal temperature sensor 13 is bolted to the pressure pipe 1. The internal temperature sensor 13 is used to detect the temperature at the middle position of the rear pipe 92. An insulating part 10 for fixing the resistance tube 9 is arranged on the inner pipe 7.

[0044] Reference Figure 2 and Figure 5 The insulating component 10 includes a plurality of support plates 101 evenly arranged along the axial direction of the inner tube 7. Each support plate 101 is formed by bolting together two single plates. The outer circumferential wall of the support plate 101 is attached to the inner circumferential wall of the inner tube 7. Several ceramic tubes 102 are threaded through the support plate 101. The ceramic tubes 102 can be made of silicon nitride ceramic material in the prior art.

[0045] Reference Figure 2 and Figure 5 The ceramic tube 102 corresponds one-to-one with the resistance tube 9. The ceramic tube 102 is slidably sleeved on the resistance tube 9. There is a 2mm gap between the inner circumferential sidewall of the ceramic tube 102 and the outer circumferential sidewall of the resistance tube 9. The inner temperature sensor 13 is sleeved with a core-protecting tube 22. The core-protecting tube 22 passes through the support plate 101, and the measuring point of the inner temperature sensor 13 extends out of the end of the core-protecting tube 22.

[0046] When the resistance tube 9 is energized, it generates heat. At this time, the dry air flowing in from the air inlet 5 will quickly diffuse into the pressure tube 1 under the obstruction of the turbulence cone plate 16, and then flow from the inside of the resistance tube 9 to the filter plate 12. The filter plate 12 will filter out the residual salt crystals in the air, and then flow from the mesh on the filter plate 12 to the exhaust cone 3. During the air flow, the air will be rapidly heated, and the internal temperature sensor 13 will accurately measure the temperature at the rear end tube 92.

[0047] Meanwhile, the heat accumulated inside the inner tube 7 is transferred to the middle septum tube 82 and then to the supporting cone ring 83. During this process, the volume of the inner tube 7 expands, and the supporting cone ring 83 reduces the clamping force on the pressure-bearing tube 1 through deformation. The insulation layer 84 prevents the heat from diffusing to the pressure-bearing tube 1, so that a large amount of heat can be accumulated inside the inner tube 7, thereby improving the heating effect on the air flowing through the resistance tube 9.

[0048] Reference Figure 2 and Figure 4 The pressure-bearing pipe 1 is fitted with a cooling pipe 14. An expansion ring protrusion 18 is integrally formed on the cooling pipe 14. The expansion ring protrusion 18 can deform. A cooling element 15 for cooling the surface of the pressure-bearing pipe 1 is arranged on the cooling pipe 14.

[0049] Reference Figure 2 and Figure 4 The cooling component 15 includes ventilation pipes 151 welded to both ends of the cooling pipe 14, one of which is used to connect to an external fan. Both ends of the cooling pipe 14 are welded with end rings 152, which are welded to the pressure pipe 1. A spiral strip 153 is wound around the pressure pipe 1 along its axial direction.

[0050] Reference Figure 2 and Figure 4 The spiral 153 can be spliced ​​by welding multiple steel bars sequentially onto the pressure pipe 1. The spiral 153 is located between the pressure pipe 1 and the cooling pipe 14. An external temperature sensor 154 is bolted onto the cooling pipe 14. The external temperature sensor 154 is used to detect the temperature between the pressure pipe 1 and the cooling pipe 14.

[0051] When the temperature detected by the external temperature sensor 154 is higher than the design temperature, the external fan injects air into one of the ventilation pipes 151. Under the action of the guide wire of the spiral strip 153, the air flows rapidly in the cooling pipe 14 and carries away the heat from the surface of the pressure pipe 1, thereby reducing the temperature of the surface of the pressure pipe 1 and reducing the possibility of deformation of the pressure pipe 1 due to overheating.

[0052] The implementation principle of a high-energy-density electric heater for aviation testing according to an embodiment of this application is as follows: Before starting the electric heater, an external power source supplies power to the heating wire 62. The heating wire 62 generates a large amount of heat, which heats and evaporates the air in the pressure pipe 1. The heated and evaporated air is discharged through the exhaust pipe 61, while the salt crystals that are evaporated and crystallized remain at the bottom of the pressure pipe 1. During subsequent maintenance, workers can discharge the salt crystals through the drain valve 63.

[0053] When the resistance tube 9 is energized, it generates heat. At this time, the dry air flowing in from the air inlet 5 will quickly diffuse into the pressure tube 1 under the obstruction of the turbulence cone plate 16, and then flow from the inside of the resistance tube 9 to the filter plate 12. The filter plate 12 will filter out the residual salt crystals in the air, and then flow from the mesh on the filter plate 12 to the exhaust cone 3. During the air flow, the air will be rapidly heated, and the internal temperature sensor 13 will accurately measure the temperature at the rear end tube 92.

[0054] Meanwhile, the heat accumulated inside the inner tube 7 is transferred to the middle septum tube 82 and then to the supporting cone ring 83. During this process, the volume of the inner tube 7 expands, and the supporting cone ring 83 reduces the clamping force on the pressure-bearing tube 1 through deformation. The insulation layer 84 prevents the heat from diffusing to the pressure-bearing tube 1, so that a large amount of heat can be accumulated inside the inner tube 7, thereby improving the heating effect on the air flowing through the resistance tube 9.

[0055] When the temperature detected by the external temperature sensor 154 is higher than the design temperature, the external fan injects air into one of the ventilation pipes 151. Under the action of the guide wire of the spiral strip 153, the air flows rapidly in the cooling pipe 14 and carries away the heat from the surface of the pressure pipe 1, thereby reducing the temperature of the surface of the pressure pipe 1 and reducing the possibility of deformation of the pressure pipe 1 due to overheating.

[0056] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A high-energy-density electric heater for aviation testing, characterized in that: The system includes a pressure-bearing pipe (1), a support base (2) at the bottom of the pressure-bearing pipe (1), an air outlet cone (3) coaxially arranged at one end of the pressure-bearing pipe (1), and a maintenance cover plate (4) bolted to the other end. An air inlet (5) is provided on the maintenance cover plate (4). A pre-discharge component (6) is provided on the pressure-bearing pipe (1) for discharging air from the pressure-bearing pipe (1). An inner pipe (7) is coaxially arranged inside the pressure-bearing pipe (1). A heat-insulating support component (8) for support and heat preservation is provided between the pressure-bearing pipe (1) and the inner pipe (7). Several resistance tubes (9) are arranged inside the inner pipe (7). An insulating component (10) for fixing the resistance tube (9) is provided on the tube (7). A junction box (11) is provided outside the pressure-bearing tube (1). The resistance tube (9) is electrically connected to the junction box (11). A filter screen plate (12) is provided at one end of the inner tube (7) near the outlet cone tube (3). An internal temperature sensor (13) is provided on the pressure-bearing tube (1). The internal temperature sensor (13) is used to detect the temperature inside the inner tube (7). A cooling tube (14) is provided outside the pressure-bearing tube (1). A cooling component (15) for cooling the surface of the pressure-bearing tube (1) is provided on the cooling tube (14).

2. The high-energy-density electric heater for aviation testing according to claim 1, characterized in that: The pre-discharge component (6) includes an exhaust pipe (61) disposed at the top of the pressure-bearing pipe (1), an electric heating wire (62) disposed at the bottom inner part of the pressure-bearing pipe (1), and a drain valve (63) disposed at the bottom of the pressure-bearing pipe (1), with the drain valve (63) close to the electric heating wire (62).

3. The high-energy-density electric heater for aviation testing according to claim 1, characterized in that: The heat insulation support (8) includes an inner guide tube (81) coaxially disposed within the air outlet cone tube (3). One end of the inner guide tube (81) near the inner tube (7) is sleeved on the filter screen plate (12). A middle partition tube (82) is coaxially sleeved on the inner tube (7). One end of the middle partition tube (82) near the filter screen plate (12) is sleeved on the inner guide tube (81). A plurality of elastic... A plurality of support cone rings (83) are arranged along the axial direction of the middle partition pipe (82). The outer circumferential wall of the support cone ring (83) is used to attach to the inner circumferential wall of the pressure bearing pipe (1). A heat insulation layer (84) is provided between the inner pipe (7) and the middle partition pipe (82), between the middle partition pipe (82) and the pressure bearing pipe (1), and between the inner guide pipe (81) and the outlet cone pipe (3).

4. A high-energy-density electric heater for aviation testing according to claim 3, characterized in that: The insulating component (10) includes a plurality of support plates (101) evenly arranged along the axial direction of the inner tube (7). The outer circumferential wall of the support plate (101) is attached to the inner circumferential wall of the inner tube (7). A plurality of ceramic tubes (102) are detachably disposed on the support plate (101). The ceramic tubes (102) correspond one-to-one with the resistor tubes (9). The ceramic tubes (102) are slidably sleeved on the resistor tubes (9). There is a gap between the inner circumferential wall of the ceramic tubes (102) and the outer circumferential wall of the resistor tubes (9).

5. A high-energy-density electric heater for aviation testing according to claim 4, characterized in that: A detachable baffle cone (16) is provided on the inspection cover (4). The baffle cone (16) is located between the air inlet (5) and the pressure pipe (1). The diameter of the baffle cone (16) is larger than that of the air inlet (5). There is a gap between the baffle cone (16) and the air inlet (5). Several ventilation holes (17) are provided on the baffle cone (16).

6. A high-energy-density electric heater for aviation testing according to claim 1, characterized in that: The cooling component (15) includes ventilation pipes (151) disposed at both ends of the cooling pipe (14). Both ends of the cooling pipe (14) are provided with end rings (152). The end rings (152) are disposed on the pressure pipe (1). A spiral strip (153) is wound on the pressure pipe (1) along its axial direction. The spiral strip (153) is located between the pressure pipe (1) and the cooling pipe (14). An external temperature sensor (154) is disposed on the cooling pipe (14). The external temperature sensor (154) is used to detect the temperature between the pressure pipe (1) and the cooling pipe (14).

7. A high-energy-density electric heater for aviation testing according to claim 6, characterized in that: An expansion ring protrusion (18) is integrally formed on the cooling pipe (14).

8. A high-energy-density electric heater for aviation testing according to claim 1, characterized in that: The resistor tube (9) includes a front tube (91) and a rear tube (92). The front tube (91) is located between the inspection cover plate (4) and the rear tube (92). The inner diameter of the rear tube (92) is the same as that of the front tube (91). The outer diameter of the rear tube (92) is larger than that of the front tube (91). The internal temperature sensor (13) is used to detect the temperature at the middle position of the rear tube (92).

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