Aviation airspeed tube sealing detection connector
The airspeed tube seal detection connector uses a tight sealing ring to tightly seal the airspeed tube static pressure hole, which solves the problems of complex structure, large size and high price of the existing device, and realizes high-precision and low-cost air-tightness detection of airspeed tubes.
Patent Information
- Application Number
- CN202422620776.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-29
- Publication Date
- 2025-08-22
- Estimated Expiration
- 2034-10-29
AI Technical Summary
The existing airspeed tube detection devices have complex structure, large size, large weight and high price, making them difficult to promote and apply.
The airspeed tube seal detection connector is adopted, and the swelling seal ring is used to tightly wrap the static pressure hole on the airspeed tube through the driving mechanism to achieve a simple and tight sealing seal.
It realizes airtightness detection with a simple structure and compact airspeed tube, with high detection accuracy, supports single-point or multi-point detection, and is suitable for automated and intelligent detection, reducing investment costs.
Smart Images
Figure CN223259143U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of airtightness detection equipment, in particular to the technical field of airtightness detection of aviation pitot tubes. Background Art
[0002] A pitot tube is a device that measures the total and static pressures of an airflow to determine its velocity. It senses the total and static pressures of the airflow and transmits the measured pressure data to atmospheric data computers, flight instruments, and other devices. It is widely used in aerospace equipment, primarily to measure flight speed. The pitot tube allows airflow to enter the tube through an air inlet on the tube body. The airflow duct inside the pitot tube guides the airflow to the sensor at the end of the duct. The sensor senses the dynamic pressure of the airflow, which is then converted by electronic equipment or monitoring devices to detect the flight speed of the aircraft.
[0003] The pitot tube is a critical sensor for drones. Whether the pitot tube functions properly and measures accurately is directly related to the flight safety of the drone. Therefore, it is often necessary to test the airtightness of the pitot tube. Prior art pitot tube testing devices include a clamping fixture, a three-axis turntable, a test platform, a detection sensor, an axial flow fan, a controller, and a storage and display device. The clamping fixture is used to secure the pitot tube to be tested and seal the openings in the pitot tube to allow gas to be introduced into the pitot tube for testing. Traditional methods of sealing the openings in pitot tubes use cylinders to drive a pressure member to press the openings (static pressure holes) from the outside. Multiple openings require the same number of cylinders, making the entire testing device complex, bulky, heavy, and expensive, making it difficult to implement. Summary of the Invention
[0004] The purpose of the utility model is to provide an aviation pitot tube sealing detection connector, which has a simple and compact product structure and is easy to implement, and can well solve the above-mentioned technical problems.
[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:
[0006] An aviation pitot tube sealing detection connector comprises a main body, which is provided with a socket hole adapted to receive the pitot tube; an expansion sealing ring is embedded in the inner peripheral wall of the socket hole, and a driving mechanism is provided in the main body, which is used to drive the expansion sealing ring so that the expansion sealing ring expands and tightly wraps the pitot tube, thereby achieving the goal of the expansion sealing ring sealing the static pressure hole on the pitot tube.
[0007] The above scheme is further that the driving mechanism includes a sealing chamber constructed in the main body and a piston installed in the sealing chamber. The piston has an extended structure and a driving part that supports the expansion and contraction sealing ring. The air pressure is introduced through the sealing chamber to push the piston, so that the piston can move axially and drive the driving part to push the expansion and contraction sealing ring, so that the expansion and contraction sealing ring expands and tightly wraps the pitot tube.
[0008] The above scheme is further that the main body includes a fixed shaft and an outer sleeve, and the sealed chamber is constructed by enclosing the fixed shaft and the outer sleeve of the main body; the fixed shaft has a fixed end and a hollow column protruding from one end of the fixed end; the inner end of the outer sleeve is locked on the fixed end of the fixed shaft through a threaded connection, and the outer end of the outer sleeve extends outward and wraps the hollow column, so that the center hole of the outer sleeve is coaxial with the inner hole of the hollow column and forms a socket hole, and an expansion and contraction sealing ring is positioned and assembled on the inner circumferential wall of the outer sleeve; the piston is a tubular body and is sleeved on the hollow column, and the driving part extends to the front end of the hollow column; the inner circumferential wall of the piston is sealed and connected to the outer circumferential surface of the hollow column through a first sealing ring, and the outer periphery of the piston is sealed and connected to the inner circumferential surface of the outer sleeve through a second sealing ring.
[0009] The above solution is further that there are multiple expansion and contraction sealing rings and they are arranged according to the axial spacing of the sleeve hole, and a supporting ring is embedded between two adjacent expansion and contraction sealing rings, so that the multiple expansion and contraction sealing rings form a linkage.
[0010] The above solution is further provided with a floating plug in the hollow column, and the floating plug is inserted into the corresponding port of the pitot tube to form a positioning support relationship.
[0011] The above solution is further provided with a return spring between the piston and the outer sleeve, and the return spring drives the piston to retreat and release the expansion and contraction sealing ring.
[0012] The above solution is further that the piston is a multi-step tubular body, the driving part is a convergent tube section, and the inner diameter of the driving part is consistent with the inner hole diameter of the hollow column.
[0013] The above solution is further provided with a valve on the fixed end of the fixed shaft, and the valve is used to control the air intake and exhaust of the sealed cavity.
[0014] The utility model is connected with the main body of the pitot tube, and uses the expanding sealing ring to expand and tightly wrap the pitot tube, so that the expanding sealing ring seals the static pressure hole on the pitot tube. The utility model has a simple and compact structure, low investment cost, convenient and reliable implementation, greatly facilitates the air tightness detection of the pitot tube, has good detection accuracy, can perform single-point or multi-point detection, and accurately judge the deviation condition of the pitot tube. The detection accuracy is high, and it is also easy to realize automatic intelligent detection, thereby promoting the air tightness detection work of the pitot tube. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Attachment Figure 1This is a schematic structural diagram of one embodiment of the present utility model;
[0016] Attachment Figure 2 for Figure 1 A schematic diagram of the structural decomposition of an embodiment;
[0017] Attachment Figure 3 This is a schematic diagram of the connection of the pitot tube of the utility model;
[0018] Attachment Figure 4 for Figure 3 Schematic diagram of the structure after connecting the pitot tube;
[0019] Attachment Figure 5 for Figure 4 An enlarged cross-sectional view of the internal structure after the pitot tube is connected. DETAILED DESCRIPTION
[0020] The concept, specific structure and technical effects of the present invention will be further described below in conjunction with the accompanying drawings to fully understand the purpose, characteristics and effects of the present invention.
[0021] It should be noted that in the description of this utility model, terms such as "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. These are merely for ease of description and do not indicate or imply that the device or component described must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0022] See Figure 1 、 2 , 3, 4, and 5 are schematic structural diagrams of preferred embodiments of the present invention. The present invention relates to an aviation pitot tube sealing detection connector, which has a main body 1. The main body 1 is formed into a long cylindrical body by axially combining a fixed shaft 12 and an outer sleeve 13; a socket hole 11 is provided on the main body 1, and the socket hole 11 is adapted to connect the pitot tube 2. An expansion and contraction sealing ring 3 is embedded on the inner peripheral wall of the socket hole 11, and a driving mechanism 4 is provided in the main body 1. The driving mechanism 4 is used to drive the expansion and contraction sealing ring 3 so that the expansion and contraction sealing ring 3 expands and tightly wraps the pitot tube 2, so that the expansion and contraction sealing ring 3 seals the static pressure hole 21 on the pitot tube 2; in this way, gas can be introduced into the pitot tube for detection, the structure is simple, and the connection is convenient and quick, which is conducive to the cooperation with the detector for detection. The expansion and contraction sealing ring 3 is made of elastic material and has better repeated expansion and contraction characteristics, meeting the requirements of use and life.
[0023] Figure 1 、 2As shown in Figures 3, 4, and 5, this embodiment further provides that the driving mechanism 4 includes a sealing chamber 41 constructed in the main body 1 and a piston 42 installed in the sealing chamber 41. The piston 42 has an extension structure and a driving portion 421 that supports the expanding and retracting sealing ring 3. Air pressure is introduced through the sealing chamber 41 to push the piston 42, so that the piston 42 can move axially and drive the driving portion 421 to push the expanding and retracting sealing ring 3, so that the expanding and retracting sealing ring 3 expands and tightly wraps the pitot tube 2. When the expanding and retracting sealing ring 3 expands, it self-adapts and conforms to the outer peripheral surface of the pitot tube 2, so as to tightly wrap the pitot tube 2, and has good sealing performance. It can conveniently and quickly block the static pressure hole 21 on the pitot tube 2, which is beneficial to detection work. Furthermore, the sealing chamber 41 is constructed by enclosing the fixed shaft 12 and the outer sleeve 13 of the main body 1; the fixed shaft 12 has a fixed end 121 and a hollow column 122 protruding from one end of the fixed end 121; the inner end of the outer sleeve 13 is locked to the fixed end 121 of the fixed shaft 12 by a threaded connection, and the outer end of the outer sleeve 13 extends outward and wraps around the hollow column 122, so that the center hole of the outer sleeve 13 is coaxial with the inner hole of the hollow column 122 and forms a sleeve hole 11. The length of the sleeve hole 11 is determined by the length of the outer end of the outer sleeve 13 extending outward to meet the detection requirements. The expansion and contraction sealing ring 3 is positioned and assembled on the inner peripheral wall of the outer sleeve 13, and an inner folding support 131 is provided at the outer end of the outer sleeve 13. The inner folding support 131 is used to support the corresponding end of the expansion and contraction sealing ring 3. The piston 42 is a tubular body and is sleeved on the hollow column 122 to form a shaft-sleeve connection relationship. The hollow column 122 has a guiding and positioning function, which further improves the stability and accuracy of the movement of the piston 42; the driving part 421 extends to the front end of the hollow column 122 to support the expansion and contraction of the sealing ring 3. The inner peripheral wall of the piston 42 is sealed with the outer peripheral surface of the hollow column 122 through a first sealing ring 61, and the outer periphery of the piston 42 is sealed with the inner peripheral surface of the outer sleeve 13 through a second sealing ring 62 to prevent air leakage in the sealed chamber 41. In this embodiment, when the inner end of the outer sleeve 13 is locked on the fixed end 121 through a threaded connection, a third sealing ring 63 is added between the inner end of the outer sleeve 13 and the fixed end 121 to obtain an airtight connection, thereby ensuring the air intake working performance of the sealed chamber 41.
[0024] Figure 1 、 2 As shown in Figures 3, 4, and 5, this embodiment further comprises multiple expansion seal rings 3 arranged axially with respect to the sleeve hole 11, and a support ring 5 is embedded between two adjacent expansion seal rings 3, thereby forming a linkage between the multiple expansion seal rings 3. This design not only satisfies the distribution requirement of the expansion seal rings 3 to match the static pressure holes 21 on the pitot tube 2, but also ensures that the segmented expansion seal rings 3 expand more effectively and stably during operation. The support ring 5 increases the support strength, ensuring that the expansion seal rings 3 are accurately and securely positioned, thereby enhancing the sealing effect.
[0025] A floating plug 123 is installed within the hollow column 122. This floating plug 123 is inserted into the corresponding port of the pitot tube 2 to form a positioning support. This floating plug 123 provides both cushioning and sealing functions, preventing accidental insertion. In this embodiment, the floating plug 123 is coaxial with the hollow column 122, and the inner end of the floating plug 123 is supported by a spring, providing a floating cushioning effect.
[0026] Figure 1 、 2 As shown in Figures 3, 4, and 5, this embodiment further features a return spring 7 disposed between the piston 42 and the outer sleeve 13. This return spring 7 drives the piston 42 back, releasing the expansion seal ring 3. During operation, air entering the sealed chamber 41 drives the piston 42 forward, which in turn drives the expansion seal ring 3, causing it to expand and tightly wrap around the pitot tube 2. At this time, the return spring 7 is compressed and accumulates force. When air is exhausted from the sealed chamber 41, releasing the piston 42, the elastic force of the return spring 7 drives the piston 42 back, releasing the expansion seal ring 3. The expansion seal ring 3 returns to its original position, releasing the tight wrapping around the pitot tube 2, allowing the pitot tube 2 to be removed.
[0027] In this embodiment, the piston 42 is a multi-step tubular body, facilitating fabrication and assembly. Similarly, the outer sleeve 13 is also designed as a two-stage stepped tube, achieving the desired step structure functionality and facilitating subsequent positioning and assembly. The driving portion 421 of the piston 42 is a convergent tube segment, and the inner diameter of the driving portion 421 is consistent with the inner diameter of the hollow column 122, ensuring sufficient insertion of the pitot tube 2. Furthermore, the inner shoulder formed by the convergent section of the driving portion 421 can also form a positioning relationship with the end of the hollow column 122, determining the retraction range of the piston 42 and improving the operational stability and reliability of the piston 42.
[0028] In this embodiment, a valve 8 is provided on the fixed end 121 of the fixed shaft 12. The valve 8 is used to control the air intake and exhaust of the sealed chamber 41. Preferably, the valve 8 is a thumb valve with a sliding sleeve, which can conveniently operate the air intake and exhaust of the sealed chamber 41, facilitate the insertion and removal of the pitot tube, and improve the convenience of use.
[0029] The utility model is connected with the main body of the pitot tube, and uses the expanding sealing ring to expand and tightly wrap the pitot tube, so that the expanding sealing ring seals the static pressure hole on the pitot tube. The utility model has a simple and compact structure, low investment cost, convenient and reliable implementation, greatly facilitates the air tightness detection of the pitot tube, has good detection accuracy, can perform single-point or multi-point detection, and accurately judge the deviation condition of the pitot tube. The detection accuracy is high, and it is also easy to realize automatic intelligent detection, thereby promoting the air tightness detection work of the pitot tube.
[0030] The above detailed description of the present invention in combination with the implementation methods is only for illustrating the technical concept and features of the present invention. Its purpose is to enable people familiar with this technology to understand the content of the present invention and implement it. It cannot be used to limit the scope of protection of the present invention. Therefore, all equivalent changes or modifications made according to the spirit of the present invention should be included in the scope of protection of the present invention.
Claims
1. Aviation pitot tube seal detection connector, characterized in that, The invention comprises a main body (1), a sleeve hole (11) is provided on the main body (1), and the sleeve hole (11) is adapted to be coupled to a pitot tube (2); an expansion sealing ring (3) is embedded on the inner peripheral wall of the sleeve hole (11); and a driving mechanism (4) is provided in the main body (1), and the driving mechanism (4) is used to drive the expansion sealing ring (3) so that the expansion sealing ring (3) expands and tightly wraps the pitot tube (2), thereby achieving the effect of the expansion sealing ring (3) sealing the static pressure hole (21) on the pitot tube (2).
2. The aviation pitot tube sealing detection connector according to claim 1, characterized in that: The driving mechanism (4) comprises a sealing chamber (41) constructed in the main body (1) and a piston (42) installed in the sealing chamber (41). The piston (42) has an extended structure and a driving portion (421) that supports the expansion and contraction sealing ring (3). Air pressure is introduced through the sealing chamber (41) to push the piston (42), so that the piston (42) can move axially and drive the driving portion (421) to push the expansion and contraction sealing ring (3), so that the expansion and contraction sealing ring (3) expands and tightly wraps the pitot tube (2).
3. The aviation pitot tube seal detection connector according to claim 2, characterized in that: The main body (1) includes a fixed shaft (12) and an outer sleeve (13), and the sealed cavity (41) is enclosed by the fixed shaft (12) and the outer sleeve (13) of the main body (1); the fixed shaft (12) has a fixed end (121) and a hollow column (122) protruding from one end of the fixed end (121); the inner end of the outer sleeve (13) is locked on the fixed end (121) of the fixed shaft (12) through a threaded connection, and the outer end of the outer sleeve (13) extends outward and wraps around the hollow column (122), so that the outer sleeve (13) The central hole is coaxial with the inner hole of the hollow column (122) and forms a sleeve hole (11), and an expansion and contraction sealing ring (3) is positioned and assembled on the inner peripheral wall of the outer sleeve (13); the piston (42) is a tubular body and is sleeved on the hollow column (122), and the driving part (421) extends to the front end of the hollow column (122); the inner peripheral wall of the piston (42) is sealed and connected to the outer peripheral surface of the hollow column (122) through a first sealing ring (61), and the outer periphery of the piston (42) is sealed and connected to the inner peripheral surface of the outer sleeve (13) through a second sealing ring (62).
4. The aviation pitot tube sealing detection connector according to claim 1, 2 or 3, characterized in that: There are multiple expansion and contraction sealing rings (3) which are arranged at intervals along the axial direction of the sleeve hole (11), and a supporting ring (5) is embedded between two adjacent expansion and contraction sealing rings (3), so that the multiple expansion and contraction sealing rings (3) form a linkage.
5. The aviation pitot tube sealing detection connector according to claim 3, characterized in that: A floating plug (123) is provided in the hollow column (122), and the floating plug (123) is inserted into a corresponding port of the pitot tube (2) to form a positioning support relationship.
6. The aviation pitot tube sealing detection connector according to claim 3, characterized in that: A return spring (7) is provided between the piston (42) and the outer sleeve (13), and the return spring (7) drives the piston (42) to retreat and release the expansion and contraction sealing ring (3).
7. The aviation pitot tube seal detection connector according to claim 3, characterized in that: The piston (42) is a multi-step tubular body, the driving portion (421) is a convergent tube section, and the inner diameter of the driving portion (421) is consistent with the inner hole diameter of the hollow column (122).
8. The aviation pitot tube sealing detection connector according to claim 3, characterized in that: A valve (8) is provided on the fixed end (121) of the fixed shaft (12), and the valve (8) is used to control the air intake and exhaust of the sealed cavity (41).