Maintainable waterproof, dustproof and insect-proof machine body pressure sensor pipeline
By introducing a water storage chamber and a detachable filter sleeve into the fuselage pressure sensor pipeline, the problems of drainage difficulties and the inability to replace the filter screen are solved, achieving waterproof, dustproof and insect-proof effects, which are suitable for the aviation field.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- TAIYUAN AERO INSTR
- Filing Date
- 2025-12-24
- Publication Date
- 2026-07-14
AI Technical Summary
The existing waterproof and dustproof design of the pressure sensor has problems such as difficulty in drainage and inability to replace the filter, which leads to easy blockage of the pipeline, affecting the measurement accuracy and sensor life.
A pipeline structure including a sensor, a sealed adapter column, a heating device, and a gas path adapter frame was designed. The structure achieves water removal and drainage, dust prevention and insect prevention through a water storage chamber, a filter device, and a detachable filter sleeve. The device is also easy to maintain and operate.
It achieves effective water removal, drainage, dust prevention, and insect control. The device has a simple structure, low cost, and is easy to maintain, making it suitable for the aviation industry.
Smart Images
Figure CN121655776B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of fuselage pressure sensor technology, and discloses a maintainable, waterproof, dustproof and insect-proof fuselage pressure sensor pipeline. Background Technology
[0002] The fuselage pressure sensor is installed on the surface of the aircraft skin. The surface airflow pressure is transmitted to the rear sensor for measurement through sensing holes and pipes. If rainwater, sand, dust, insects, etc. enter the pipes and are not discharged or cleaned in time, they will block the air passage and affect the pressure measurement. If rainwater, sand, dust, etc. enter the sensor, they will damage the sensor. All of these can cause malfunctions.
[0003] There are two main types of waterproof and dustproof designs for existing pressure sensors: one type involves water vapor entering through the sensing port, first flowing into a sedimentation tank, and then to the pressure sensor. A dustproof screen is installed at the inlet of the pipe before it enters the pressure sensor. Figure 1 As shown. This design can effectively remove water and dust, but with the requirements of miniaturization and weight reduction, some static pressure sensors have eliminated the sedimentation tank design, and the dustproof screen on the pipeline is small in size due to pipeline limitations, making it easy to clog the air passage. Another option is to design a water storage container at the rear end of the sensing orifice, with the heater and water storage container designed to be close together for water removal, and a dustproof screen is installed at the pipeline inlet before entering the pressure sensor, such as... Figure 2 As shown. This design generally does not require replacement or maintenance of the water storage container, and the dustproof net at the rear end is not replaceable. It is also generally small in size and has a dense mesh, which makes it easy for various impurities to stick and cause pipe blockage. If the dustproof net is removed, sand, dust, insects, etc. can easily enter the pressure sensor at the rear end, causing the sensor to malfunction. Summary of the Invention
[0004] The purpose of this invention is to provide a maintainable, waterproof, dustproof, and insect-proof fuselage pressure sensor pipeline that can achieve water removal and drainage, dust prevention and insect prevention. Moreover, the device is maintainable, easy to operate, and small in size, solving the problems of difficult drainage and inability to replace the filter screen in the prior art. At the same time, it has a simple structure, low manufacturing cost, and is easy to promote and apply, and has great practical value. It can be widely used in the aviation field.
[0005] To achieve the above-mentioned technical effects, the technical solution adopted by the present invention is as follows:
[0006] A maintainable, waterproof, dustproof, and insect-proof body pressure sensor tubing, comprising:
[0007] The sensor is a cylindrical structure, and a sensing skin is provided on the outside of the sensor. Several sensing holes are provided on the sensing skin at the bottom of the sensor.
[0008] A sealing adapter post is inserted into the sensor. The sealing adapter post is equipped with a water baffle and a connecting channel. The water baffle, together with the sensor and the sensing skin, forms a water storage cavity for storing water flowing in from the sensing holes. The air inlet of the connecting channel is radially opened along the sealing adapter post and communicates with the internal space of the sensor. The air outlet of the connecting channel is arranged along the axis of the sealing adapter post. The air inlet of the connecting channel is located above all the sensing holes.
[0009] A heating device, which is wrapped around the outer wall of the sensor, is used to heat the water storage chamber;
[0010] A gas path adapter frame includes a gas path channel and a filter hole; the gas path adapter frame covers the sensor; the air inlet of the gas path channel is connected to the air outlet of the connecting channel, and the air outlet of the gas path channel is connected to the filter hole; the filter hole is equipped with a filter device for filtering the gas flowing out of the air outlet of the gas path channel, and the filter hole is equipped with a sensor connector for connecting the filter hole to a pressure sensor.
[0011] Furthermore, the connection channel includes a connecting hole and a connecting hole. The connecting hole is arranged along the axial direction of the sealing adapter post. The air outlet of the connecting hole is perpendicular to the connecting hole, and the air inlet of the connecting hole is connected to the internal space of the sensor.
[0012] Furthermore, the filtering device includes a filter adapter and a filter sleeve; the filter adapter has a blind hole along the axis, and the open end of the blind hole is connected to the air outlet of the air passage; the filter adapter has a plurality of vent holes communicating with the blind hole along the radial direction; the filter sleeve is installed on the filter adapter and covers the outlet of the vent holes; the filter adapter is threadedly connected to the filter holes.
[0013] Furthermore, the filter sleeve is a thin-walled metal cylinder with several small holes.
[0014] Furthermore, a first sealing ring is provided between the filter adapter and the filter hole.
[0015] Furthermore, it also includes a ground dust removal connector, which, together with the filter hole, is used to connect to an external pressurized air source to purge the air passage, water storage chamber, and sensing hole.
[0016] Furthermore, the heating device is an electric heating wire.
[0017] Furthermore, a second sealing ring is provided between the sealing adapter post and the sensor.
[0018] Furthermore, the air inlet of the connecting channel is located at the highest position on the sealing adapter post and above all the sensing holes.
[0019] Compared with the prior art, the beneficial effects of this invention are:
[0020] This invention can achieve water removal and drainage, dust prevention and insect prevention. Moreover, the device is maintainable, easy to operate and small in size. It solves the problems of difficult drainage and inability to replace the filter screen in the prior art. At the same time, it has a simple structure, low manufacturing cost, and is easy to promote and apply. It has great practical value and can be widely used in the aviation field. Attached Figure Description
[0021] Figure 1 A schematic diagram of the structure of the first waterproof and dustproof design for a fuselage pressure sensor in the prior art;
[0022] Figure 2 A schematic diagram of the structure of the second type of waterproof and dustproof design for fuselage pressure sensor in the prior art;
[0023] Figure 3 This is a schematic diagram of the maintainable waterproof, dustproof, and insect-proof body pressure sensor pipeline in the embodiment.
[0024] Figure 4 This is a schematic diagram of the assembly of the sensor connector and the air circuit adapter in the embodiment.
[0025] Figure 5 This is a schematic diagram of the structure of the maintainable waterproof, dustproof, and insect-proof body pressure sensor pipeline during cleaning, as shown in the embodiment.
[0026] Among them, 1-sensing skin, 2-electric heating wire, 3-sealing adapter post, 31-water baffle, 32-connecting hole, 33-connecting hole, 4-sensor, 5-sensing hole, 6-second sealing ring, 7-air circuit adapter frame, 71-cover part, 72-adapter part, 8-first sealing ring, 9-filter sleeve, 10-water storage chamber, 11-filter adapter nozzle, 12-ground dust removal pipe nozzle, 13-blind hole, 14-sensor pipe nozzle, 15-air circuit channel. Detailed Implementation
[0027] The present invention will now be described in further detail with reference to the embodiments and accompanying drawings. However, this should not be construed as limiting the scope of the above-described subject matter of the present invention to the following embodiments; all technologies implemented based on the content of the present invention fall within the scope of the present invention.
[0028] See Figures 3 to 5 The present invention provides a maintainable, waterproof, dustproof and insect-proof fuselage pressure sensor pipeline for use in an aviation atmospheric data system. The pipeline includes a sensing skin 1, a sensor 4, a sealing adapter 3, a heating device, an air path adapter 7 and a sensor connector 14.
[0029] The sensor 4 is a cylindrical structure. The sensor 4 is provided with a sensing skin 1 on the outside. The sensing skin 1 is installed on the aircraft and is co-shaped with the aircraft skin. Several sensing holes 5 are provided on the sensing skin 1 at the bottom of the sensor 4, among which the lowest sensing hole 5 is located at the lowest point of the annular inner wall of the sensor 4.
[0030] The sealing adapter post 3 is inserted into the sensor 4, and a seal is achieved through the second sealing ring 6. A baffle plate 31 is provided at the right end of the sealing adapter post 3. The baffle plate 31, together with the sensor 4 and the sensing skin 1, forms a water storage cavity 10 for storing rainwater flowing in from the sensing hole 5. A connecting channel is also provided inside the sealing adapter post 3, located to the left of the baffle plate 31. The connecting channel includes a connecting hole 32 and a connecting hole 33. The connecting hole 33 is arranged along the axis of the sealing adapter post 3. The air outlet of the connecting hole 32 is perpendicularly connected to the connecting hole 33. The connecting hole 32 is radially opened along the sealing adapter post 3 and is perpendicularly connected to the connecting hole 33. The air inlet of the connecting hole 32 is connected to the internal space of the sensor 4. Simultaneously, the air inlet of the connecting hole 32 is located at the highest point of the sealing adapter post 3 and above all the sensing holes 5, that is, the air inlet of the connecting hole 32 is located above the highest sensing hole 5. By setting up a water storage chamber 10 to temporarily store and drain rainwater flowing in from the sensing hole 5, rainwater is prevented from entering the subsequent pipeline. At the same time, the airflow channel between the sensing hole 5 and the subsequent pipeline and pressure sensor is kept open through the connecting channel. The air inlet of the connecting channel is set above the highest sensing hole 5 to further prevent rainwater from entering the connecting channel, thus achieving the waterproof function.
[0031] The heating device uses an electric heating wire 2, which is wound around the outer wall of the sensor 4 and the sensing skin 1 to heat the water storage cavity 10, quickly transferring heat to the water storage cavity 10 and accelerating the evaporation of residual water in the water storage cavity 10.
[0032] The air path adapter 7 includes a cover portion 71 and an adapter portion 72. The cover portion 71 is a cylindrical structure, and the adapter portion 72 is a quadrangular prism structure. The cover portion 71 covers and fits over the sealing adapter post 3 and the sensor 4, and is fixed to the sensing skin 1. An air path channel 15 is provided at the bottom of the cover portion 71, and a filter hole is provided inside the adapter portion 72. The air inlet of the air path channel 15 communicates with the air outlet of the connecting hole 33 and is sealed by a sealing ring. The air outlet of the air path channel 15 communicates with the filter hole. The airflow flowing in from the sensing hole 5 passes through the water storage chamber 10, enters the air path channel 15 through the connecting hole 33, and then reaches the filter hole. A filter device is provided inside the filter hole, which includes a filter adapter nozzle 11 and a filter sleeve 9. One end of the filter adapter 11 has a blind hole 13 along its axis. After the filter adapter 11 is threaded and tightened to the filter hole, the open end of the blind hole 13 communicates with the air outlet of the air passage 15. Simultaneously, the filter adapter 11 has several vent holes along its radial direction that communicate with the blind hole 13. The filter sleeve 9 is a thin-walled metal cylinder with several small holes. The filter sleeve 9 is installed on the filter adapter 11 and covers the outlet of the vent holes. The sensor connector 14 is installed on the side wall of the adapter 72 and communicates with the filter hole. When the airflow from the air passage 15 is filtered by the filter sleeve 9, it flows through the sensor connector 14 to the pressure sensor. It should be noted that a first sealing ring 8 is provided between the filter adapter 11 and the filter hole.
[0033] This invention features an air inlet for a connecting hole 32 at the highest point of the sealing adapter 3, positioned above the highest sensing hole 5, and with the lowest point of the sealing adapter 3 flush with the lowest sensing hole 5. When rainwater enters the water storage chamber 10 formed by the sensor 4 and the sealing adapter 3 through the sensing hole 5, the rainwater is discharged from the lowest sensing hole 5. In cases of heavy rain, multiple sensing holes 5 are used for drainage. Simultaneously, an electric heating wire 2 fixed to the outside of the water storage chamber 10 rapidly transfers heat to the chamber, evaporating any remaining moisture. Furthermore, by increasing the diameter of the sealing adapter 3 according to the installation angle, the air inlet of the connecting hole 32 can always be higher than the highest sensing hole 5, ensuring that water in the water storage chamber 10 does not flow into the downstream pipeline.
[0034] When airflow carrying sand, dust, and insects passes through the sealed adapter column 3 and the air path adapter frame 7, reaching the filter adapter nozzle 11, the sand, dust, and insects are filtered and blocked by the filter sleeve 9 to prevent them from entering the pressure sensor along the pipeline. The filter adapter nozzle 11 has an internal hexagonal groove at its end, allowing the filter device to be periodically removed for cleaning and maintenance of the filter sleeve 9, preventing the long-term accumulation of sand, dust, and other contaminants that could clog the pipeline.
[0035] When the waterproof, dustproof, and insect-proof pressure sensor of this invention requires pipe cleaning after a certain period of use, first remove the filter adapter 11, then install the ground dust removal pipe 12 into the filter hole. Figure 5 As shown, the ground dust removal nozzle 12 is not connected to the sensor nozzle 14. Then, the ground dust removal nozzle 12 is connected to an external pressurized air source to clean the pipelines such as the sensing hole 5, the water storage chamber 10, and the air circuit adapter 7.
[0036] This invention can achieve water removal and drainage, dust prevention and insect prevention. Moreover, the device is maintainable, easy to operate and small in size. It solves the problems of difficult drainage and inability to replace the filter screen in the prior art. At the same time, it has a simple structure, low manufacturing cost, and is easy to promote and apply. It has great practical value and can be widely used in the aviation field.
[0037] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.
Claims
1. A maintainable, waterproof, dustproof, and insect-proof pressure sensor pipeline for a machine body, characterized in that, include: Sensor (4), the sensor (4) is a cylindrical structure, the sensor (4) is provided with a sensing skin (1) on the outside, and a plurality of sensing holes (5) are provided on the sensing skin (1) at the bottom of the sensor (4); A sealing adapter post (3) is inserted into the sensor (4). The sealing adapter post (3) is provided with a baffle plate (31) and a connecting channel. The baffle plate (31), together with the sensor (4) and the sensing skin (1), forms a water storage cavity (10) for storing water flowing in from the sensing holes (5). The air inlet of the connecting channel is radially opened along the sealing adapter post (3) and communicates with the space inside the sensor (4). The air outlet of the connecting channel is set along the axis of the sealing adapter post (3). The air inlet of the connecting channel is located above all the sensing holes (5). A heating device is wrapped around the outer wall of the sensor (4) for heating the water storage chamber (10); A gas path adapter (7) is provided, which includes a gas path channel (15) and a filter hole. The gas path adapter (7) covers the sensor (4). The air inlet of the gas path channel (15) is connected to the air outlet of the connecting channel, and the air outlet of the gas path channel (15) is connected to the filter hole. A filter device is provided in the filter hole to filter the gas flowing out from the air outlet of the gas path channel (15). The filter hole is provided with a sensor connector (14) to connect the filter hole to the pressure sensor.
2. The waterproof, dustproof, and insect-proof body pressure sensor pipeline according to claim 1, characterized in that, The connection channel includes a connecting hole (32) and a connecting hole (33). The connecting hole (33) is arranged along the axial direction of the sealing adapter post (3). The air outlet of the connecting hole (32) is perpendicular to the connecting hole (33), and the air inlet of the connecting hole (32) is connected to the internal space of the sensor (4).
3. The waterproof, dustproof, and insect-proof body pressure sensor pipeline according to claim 2, characterized in that, The filter device includes a filter adapter (11) and a filter sleeve (9); the filter adapter (11) has a blind hole (13) along its axis, and the opening end of the blind hole (13) is connected to the air outlet of the air passage (15); the filter adapter (11) has a plurality of vent holes communicating with the blind hole (13) along its radial direction, and the filter sleeve (9) is installed on the filter adapter (11) and covers the outlet of the vent holes; the filter adapter (11) is threadedly connected to the filter holes.
4. The waterproof, dustproof, and insect-proof body pressure sensor pipeline according to claim 3, characterized in that, The filter sleeve (9) is a thin-walled metal cylinder with several small holes.
5. The waterproof, dustproof, and insect-proof body pressure sensor pipeline according to claim 4, characterized in that, A first sealing ring (8) is provided between the filter adapter (11) and the filter hole.
6. The waterproof, dustproof, and insect-proof body pressure sensor pipeline according to claim 5, characterized in that, It also includes a ground dust removal pipe nozzle (12), which is connected to the filter hole and is used to connect to an external pressurized air source to purge the air passage (15), water storage chamber (10) and sensing hole (5).
7. The waterproof, dustproof, and insect-proof body pressure sensor pipeline according to claim 6, characterized in that, The heating device is an electric heating wire (2).
8. The waterproof, dustproof, and insect-proof body pressure sensor pipeline according to claim 7, characterized in that, A second sealing ring (6) is provided between the sealing adapter (3) and the sensor (4).
9. The waterproof, dustproof, and insect-proof body pressure sensor pipeline according to claim 8, characterized in that, The air inlet of the connecting channel is located at the highest position on the sealing adapter post (3) and above all the sensing holes (5).