High-pressure sealing joint of aviation aircraft

Abstract

The utility model discloses an aviation aircraft high-pressure sealing joint which comprises a joint body, one side of the joint body is provided with an internal thread, the inner wall of the internal thread is provided with a connecting mechanism, the other side of the connecting mechanism is detachably connected with a sealing mechanism, and the outer wall of the sealing mechanism is in threaded connection with an outer sleeve nut. By means of the arranged connecting mechanism, tight connection of equipment in the high-pressure environment can be achieved, the connecting pipe is in threaded connection with the internal thread through the external thread, the stability of the connector is ensured, and huge pressure in the high-pressure environment can be borne; equipment can keep excellent sealing performance in a high-pressure environment through the arranged sealing mechanism, a straight-through connector in the sealing mechanism is unique in arrangement, a through hole in the inner wall of the straight-through connector allows fluid to smoothly pass through, conical holes in the two sides of the straight-through connector are tightly matched with a connector body, an effective sealing face is formed, and the sealing performance of the equipment is improved. Due to the arrangement of the conical hole, the sealing area is increased, and the sealing effect is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to high pressure tight joint technical field, concretely is high pressure tight joint of aviation aircraft. BACKGROUND

[0002] In the aircraft oxygen system, low pressure pipeline adopts navigation mark spare part as pipeline connecting end head, when two pipes are connected, directly connect the pipe with the flat pipe nozzle and the sleeve nut to form a pipeline joint, and then connect with the straight-through joint to form a complete sealed pipeline. Due to the limitation of the process and design of the navigation mark spare part, when this kind of pipe joint is used for connecting high pressure pipes, the pipe joint cannot be completely sealed due to the high oxygen pressure, and there is a gas leakage phenomenon, which has a certain adverse effect on the flight safety of the aircraft and the oxygen demand of the passengers. Therefore, in order to solve the problem of poor sealing of the navigation mark connection method, the sealing connection technology of the aircraft oxygen system is newly researched and explored;

[0003] Patent CN109707944B discloses a kind of aircraft high pressure fluid release and indicating joint, which is composed of compression joint, shell, movable shaft, indicating block, limit lock, spring, adjusting screw and sealing ring;Compression joint and shell are compressed on the aircraft body, compression joint is connected with high pressure fluid pipeline, and shell is sealed between compression joint by thread connection and sealing ring;Movable shaft is limited in shell by limit lock, spring and adjusting screw;A plurality of inclined holes are provided in the shell, and indicating block is connected with movable shaft by thread;When indicating block is ejected under the action of high pressure fluid, it can provide an intuitive visual indication for aircraft ground crew, indicating that high pressure fluid has been safely released.

[0004] At present, the traditional aviation aircraft high pressure tight joint has great friction loss during use, which increases maintenance cost, and cannot be lubricated at different temperatures, and has certain air or water in the interior of the joint. The common tight joint cannot be sealed when encountering air and water. UTILITY MODEL CONTENT

[0005] The utility model aims at providing aviation aircraft high pressure tight joint to solve the problem of aviation aircraft high pressure tight joint in the above background technology, which has great friction loss during use, increases maintenance cost, and cannot be lubricated at different temperatures, and has certain air or water in the interior of the joint. The common tight joint cannot be sealed when encountering air and water.

[0006] To achieve the above purpose, the utility model provides the following technical scheme: aviation aircraft high pressure tight joint, including joint body, the inner thread is provided on the side of joint body, the inner wall of inner thread is provided with connecting mechanism, the other side of connecting mechanism is detachably connected with sealing mechanism, the outer wall of sealing mechanism is threadedly connected with sleeve nut;

[0007] The connecting mechanism comprises a connecting pipe, an outer wall of the connecting pipe is threadedly connected with an inner wall of the internal thread, the outer wall of the connecting pipe is provided with an external thread, the outer wall of the connecting pipe is provided with a limiting disc, and one side of the limiting disc is fixedly connected with a guide pipe.

[0008] Preferably, the joint body is provided with a tungsten disulfide coating.

[0009] Preferably, the outer wall of the internal thread is embeddedly connected with an inner wall of one side of the joint body, and one side of the connecting mechanism is detachably connected with one side of the internal thread.

[0010] Preferably, the outer wall of the connecting pipe is embeddedly connected with an inner wall of the external thread, and one side of the outer wall of the connecting pipe is fixedly connected with the inner wall of the limiting disc.

[0011] Preferably, the external thread is matched with the internal thread.

[0012] Preferably, the sealing mechanism comprises a straight-through joint, one side of the straight-through joint is movably connected with one side of the joint body, an inner wall of the straight-through joint is provided with a through hole, two sides of the straight-through joint are provided with conical holes, and outer walls of two sides of the straight-through joint are fixedly connected with threaded protrusions.

[0013] Preferably, the inner wall of the straight-through joint is throughly connected with an outer wall of the through hole, and two sides of the straight-through joint are embeddedly connected with one side of the conical hole.

[0014] Preferably, one side of the conical hole is matched with one side of the joint body.

[0015] Compared with the prior art, the utility model has the advantages of:

[0016] The joint body is provided with a tungsten disulfide coating, the friction of the tight joint is reduced, then oil-free lubrication is realized, air-tightness and water-tightness are met, the coating can not only effectively resist corrosion and abrasion of the tight joint by fluid under high-pressure environment, but also further prolong the service life of the joint.

[0017] The connecting mechanism can realize the close connection of the device in a high-pressure environment, the threaded connection of the connecting pipe through the outer thread and the inner thread ensures the stability of the joint and can withstand the great pressure in the high-pressure environment, and the setting of the limiting disc further enhances the stability of the connection and prevents loosening or falling off due to excessive pressure, in addition, the detachable connection of the connecting mechanism and the sealing mechanism makes the maintenance and replacement more convenient and reduces the maintenance cost, in terms of sealing, the straight-through joint in the sealing mechanism is matched with the joint body through the conical hole, realizing the close sealing of the joint, this setting not only can effectively prevent air and water leakage, but also can maintain good lubrication performance at different temperatures, so as to ensure the long-term stable operation of the joint in the high-pressure environment;

[0018] The sealing mechanism can make the device maintain excellent sealing performance in a high-pressure environment, wherein the straight-through joint in the sealing mechanism is unique, the through hole in the inner wall allows the fluid to flow smoothly, and the conical holes on both sides are tightly matched with the joint body to form an effective sealing surface, the setting of the conical hole not only increases the sealing area and improves the sealing effect, but also maintains stable sealing performance at different temperatures and pressures, in addition, the threaded protrusions on the outer wall of the straight-through joint are threadedly connected with the sleeve nut, further enhancing the reliability of the sealing, this multi-level sealing setting can maintain excellent sealing performance for a long time in a high-pressure environment, effectively avoiding the air leakage phenomenon caused by poor sealing, thereby ensuring the flight safety of the aircraft and the oxygen demand of the passengers. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a three-dimensional structure schematic view of the utility model;

[0020] Figure 2 It is a connecting mechanism schematic view of the utility model;

[0021] Figure 3 It is a sealing mechanism schematic view of the utility model;

[0022] Figure 4 It is a three-dimensional structure side view explosion schematic view of the utility model.

[0023] In the drawing: 1, joint body; 11, tungsten disulfide coating; 2, inner thread; 3, connecting mechanism; 4, sealing mechanism; 5, sleeve nut; 31, connecting pipe; 32, outer thread; 33, limiting disc; 34, guide pipe; 41, straight-through joint; 42, through hole; 43, conical hole; 44, threaded protrusion. DETAILED DESCRIPTION

[0024] Clearly, the described embodiments are merely a part of the embodiments of the present application, but not all the embodiments. Based on the embodiments of the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0025] Please refer to Figures 1-4 The present application provides an embodiment:

[0026] The aviation aircraft high-pressure tight joint comprises a joint body 1, an internal thread 2 is arranged on one side of the joint body 1, a connecting mechanism 3 is arranged on the inner wall of the internal thread 2, a sealing mechanism 4 is detachably connected to the other side of the connecting mechanism 3, an outer sleeve nut 5 is threadedly connected to the outer wall of the sealing mechanism 4, the connecting mechanism 3 comprises a connecting pipe 31, the outer wall of the connecting pipe 31 is threadedly connected to the inner wall of the internal thread 2, the outer wall of the connecting pipe 31 is provided with an external thread 32, the outer wall of the connecting pipe 31 is provided with a limiting disc 33, a guide pipe 34 is fixedly connected to one side of the limiting disc 33, the outer wall of the internal thread 2 and the inner wall of one side of the joint body 1 are embeddedly connected, and one side of the connecting mechanism 3 is detachably connected to one side of the internal thread 2.

[0027] The outer wall of the connecting pipe 31 is embeddedly connected to the inner wall of the external thread 32, the connecting stability between the connecting pipe 31 and the external thread 32 is increased, the outer wall of the connecting pipe 31 is fixedly connected to the inner wall of the limiting disc 33, the connecting pipe 31 is limited by the limiting disc 33, so that the connecting pipe 31 is prevented from falling off during use, the external thread 32 is matched with the internal thread 2, the connecting mechanism 3 and the joint body 1 are conveniently connected, the sealing mechanism 4 comprises a straight-through joint 41, one side of the straight-through joint 41 is movably connected to one side of the joint body 1, the straight-through joint 41 is conveniently disassembled and replaced, the inner wall of the straight-through joint 41 is provided with a through hole 42, high-pressure fluid is conveniently transmitted, and both sides of the straight-through joint 41 are provided with conical holes 43, the contact area between the straight-through joint 41 and the joint body 1 is increased through the conical holes 43, and the sealing property is improved.

[0028] Please refer to Figure 2 In order to quickly connect the guide pipe 34 on the joint body 1, the outer wall of the connecting pipe 31 is embeddedly connected to the inner wall of the external thread 32, the outer wall of the connecting pipe 31 is fixedly connected to the inner wall of the limiting disc 33, and the external thread 32 is matched with the internal thread 2.

[0029] The outer wall of the through joint 41 is fixed with a threaded protrusion 44 on both sides, and the threaded protrusion 44 facilitates the connection between the sleeve nut 5 and the through joint 41. The inner wall of the through joint 41 is connected through the outer wall of the through hole 42, which facilitates the transmission of high-pressure fluid through the through hole 42. The two sides of the through joint 41 are embeddedly connected with one side of the conical hole 43, which increases the connection stability between the through joint 41 and the joint body 1. One side of the conical hole 43 matches one side of the joint body 1, which improves the sealing performance. The connection mechanism 3 can facilitate the connection and installation of the equipment, and improve the connection stability. The sealing mechanism 4 can increase the sealing performance of the equipment and prevent the high-pressure fluid from leaking.

[0030] Please refer to Figure 3 , in order to quickly fix the joint body 1 on the through joint 41, the sealing mechanism 4 includes the through joint 41, one side of the through joint 41 is movably connected with one side of the joint body 1, the inner wall of the through joint 41 is provided with a through hole 42, the two sides of the through joint 41 are provided with a conical hole 43, the outer wall of the through joint 41 is fixed with a threaded protrusion 44 on both sides, the inner wall of the through joint 41 is connected through the outer wall of the through hole 42, the two sides of the through joint 41 are embeddedly connected with one side of the conical hole 43, and one side of the conical hole 43 matches one side of the joint body 1;

[0031] In order to enhance the sealing performance of the joint, the inner wall of the conical hole 43 is provided with a sealing ring groove, and a sealing ring is arranged in the sealing ring groove. The sealing ring is made of elastic material, such as rubber or silicone, to ensure that it can effectively prevent gas or liquid leakage in a high-pressure environment. When the straight-through joint 41 is connected with the joint body 1, the sealing ring is extruded and tightly fitted on the contact surface of the conical hole 43 and the joint body 1, thereby providing reliable sealing effect. In addition, in order to further improve the stability and durability of the joint, the inner wall of the sleeve nut 5 is provided with threads matched with the threaded protrusions 44. When the sleeve nut 5 is tightened on the straight-through joint 41, the threaded protrusions 44 tightly match with the threads in the sleeve nut 5, increasing the connection strength of the joint. At the same time, the setting of the sleeve nut 5 also facilitates disassembly and maintenance, so that when the joint needs to be replaced or repaired, it can be operated conveniently and quickly. Through the setting of the connecting mechanism 3 and the sealing mechanism 4, the problems of large friction wear, high maintenance cost and inability to lubricate at different temperatures of the existing high-pressure tight joint of the aircraft in use are solved. At the same time, through the setting of the conical hole 43 and the sealing ring, and the cooperation of the sleeve nut 5 and the threaded protrusions 44, the sealing performance and stability of the joint are further improved, ensuring the safe operation of the aircraft oxygen system. The surface of the joint body 1 is coated with a tungsten disulfide coating 11, which reduces the friction of the tight joint and realizes oil-free lubrication. It is air-tight and water-tight. This coating not only effectively resists corrosion and wear of the tight joint by fluid in a high-pressure environment, but also further prolongs the service life of the joint, ensuring long-term stable operation of the aircraft oxygen system. At the same time, the setting of the coating can also reduce the friction resistance of the joint to some extent, making the joint more smooth during connection and disassembly, and improving the operation efficiency.

[0032] Working principle: first through the outer wall of the connecting pipe 31 and the inner wall of the outer thread 32 embedded connection, increase the connecting pipe 31 and the connecting stability between the outer thread 32, the outer wall of the connecting pipe 31 side and the inner wall of the limiting disc 33 fixed, through the limiting disc 33 limiting connecting pipe 31, prevent the connecting pipe 31 from falling off in the process of use, the outer thread 32 and the inner thread 2 are matched, the connecting mechanism 3 and the connector body 1 are connected, the sealing mechanism 4 includes straight through connector 41, one side of straight through connector 41 and one side of connector body 1 are movably connected, convenient for dismounting and replacing straight through connector 41, the inner wall of straight through connector 41 is provided with through hole 42, which is convenient for high pressure fluid transmission, both sides of straight through connector 41 are provided with conical hole 43, which increases the contact area between straight through connector 41 and connector body 1, improves the sealing performance, the outer wall of straight through connector 41 is fixed with thread convex 44, which is convenient for connecting sleeve nut 5 and straight through connector 41, the inner wall of straight through connector 41 and the outer wall of through hole 42 are connected, which is convenient for high pressure fluid transmission, both sides of straight through connector 41 and one side of conical hole 43 are embeddedly connected, which increases the connecting stability between straight through connector 41 and connector body 1, one side of conical hole 43 and one side of connector body 1 are matched, which improves the sealing performance, the connecting mechanism 3 can be connected and installed conveniently, which improves the connecting stability, the sealing mechanism 4 can increase the sealing performance of the equipment, which prevents high pressure fluid from leaking;

[0033] Then by in order to enhance the sealing performance of the joint, the inner wall of the conical hole 43 is provided with a sealing ring groove, and a sealing ring is arranged in the sealing ring groove, the sealing ring is made of elastic material, such as rubber or silicone, to ensure that it can effectively prevent gas or liquid leakage in a high-pressure environment, when the straight-through joint 41 is connected with the joint body 1, the sealing ring is extruded and tightly fitted on the contact surface of the conical hole 43 and the joint body 1, thereby providing reliable sealing effect, in addition, in order to further improve the stability and durability of the joint, the inner wall of the sleeve nut 5 is provided with a thread matched with the thread protrusion 44, when the sleeve nut 5 is screwed on the straight-through joint 41, the thread protrusion 44 is tightly matched with the thread in the sleeve nut 5, which increases the connection strength of the joint, at the same time, the setting of the sleeve nut 5 also facilitates disassembly and maintenance, so that when the joint needs to be replaced or repaired, it can be operated conveniently and quickly, through the setting of the connecting mechanism 3 and the sealing mechanism 4, the problems of great friction wear, high maintenance cost and inability to lubricate at different temperatures of the existing high-pressure tight joint of the aircraft in the prior art are solved, at the same time, through the setting of the conical hole 43 and the sealing ring, and the cooperation of the sleeve nut 5 and the thread protrusion 44, the sealing performance and stability of the joint are further improved, which ensures the safe operation of the aircraft oxygen system, and the surface of the joint body 1 is coated with a tungsten disulfide coating 11, which reduces the friction of the tight joint, thereby realizing oil-free lubrication, air-tight and water-tight, this coating not only can effectively resist the corrosion and wear of the tight joint by fluid under high pressure, but also can further prolong the service life of the joint, ensure the long-term stable operation of the aircraft oxygen system, at the same time, the setting of the coating can also reduce the friction resistance of the joint to a certain extent, so that the joint is more smooth during connection and disassembly, which improves the operation efficiency, the above is the working process of the whole device, and the contents not described in detail in the specification all belong to the existing technology known to those skilled in the art.

[0034] Although the embodiments of the present application have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and modifications can be made to the embodiments without departing from the principles and spirits of the present application, the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. High-pressure tight joint for aircraft, comprising a joint body (1), characterized in that: One side of the joint body (1) is provided with an internal thread (2), the inner wall of the internal thread (2) is provided with a connecting mechanism (3), the other side of the connecting mechanism (3) is detachably connected with a sealing mechanism (4), the outer wall of the sealing mechanism (4) is threadedly connected with a sleeve nut (5); The connecting mechanism (3) comprises a connecting pipe (31), the outer wall of the connecting pipe (31) is threadedly connected with the inner wall of the internal thread (2), the outer wall of the connecting pipe (31) is provided with an external thread (32), the outer wall of the connecting pipe (31) is provided with a limiting disc (33), one side of the limiting disc (33) is fixedly connected with a guide pipe (34).

2. The aircraft high pressure seal of claim 1, wherein: The joint body (1) is provided with a tungsten disulfide coating (11).

3. The aircraft high pressure seal of claim 1, wherein: The outer wall of the internal thread (2) is embeddedly connected with the inner wall of one side of the joint body (1), one side of the connecting mechanism (3) is detachably connected with one side of the internal thread (2).

4. The aircraft high pressure seal of claim 1, wherein: The outer wall of the connecting pipe (31) is embeddedly connected with the inner wall of the external thread (32), one side of the outer wall of the connecting pipe (31) is fixedly connected with the inner wall of the limiting disc (33).

5. The aircraft high pressure seal of claim 4, wherein: The external thread (32) is matched with the internal thread (2).

6. The aircraft high pressure seal of claim 1, wherein: The sealing mechanism (4) comprises a straight-through joint (41), one side of the straight-through joint (41) is movably connected with one side of the joint body (1), the inner wall of the straight-through joint (41) is provided with a through hole (42), both sides of the straight-through joint (41) are provided with conical holes (43), and the outer wall of the straight-through joint (41) is fixedly connected with threaded protrusions (44) on both sides.

7. The aircraft high pressure seal of claim 6, wherein: The inner wall of the straight-through joint (41) is penetratingly connected with the outer wall of the through hole (42), and both sides of the straight-through joint (41) are embeddedly connected with one side of the conical hole (43).

8. The aircraft high pressure seal of claim 6, wherein: One side of the conical hole (43) is matched with one side of the joint body (1).

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