Pipeline one-way circulation control structure for aircraft system ground maintenance

Abstract

According to the pipeline one-way circulation control structure for aircraft system ground maintenance, a corresponding structure is designed around a three-way valve, the pipeline one-way circulation control structure for aircraft system ground maintenance has a non-ground maintenance state and a ground maintenance state, in the non-ground maintenance state, an aircraft system can work normally, and the service life of the aircraft system is prolonged. In the ground maintenance state, ground maintenance can be carried out on the aircraft system, an additional one-way valve does not need to be arranged, the sealing adapter shaft is only used in the ground maintenance state, the mass of the aircraft system cannot be greatly increased, in addition, switching between the non-ground maintenance state and the ground maintenance state does not involve dismounting and mounting of the booster pump in the aircraft system, and operation is convenient and fast.

Description

Technical Field

[0001] The present application belongs to the technical field of aircraft system ground maintenance design, and specifically relates to a pipeline one-way flow control structure for aircraft system ground maintenance. Background Art

[0002] Aircraft systems require regular ground maintenance, which involves aspects such as cleaning of pipelines and debugging of components. When performing ground maintenance, it is necessary to pump circulating medium into the aircraft system pipelines with ground support equipment. However, the circulating medium in the aircraft system pipelines is mostly driven by booster pumps, which are not strong enough to withstand reverse pressure. For this reason, a one-way valve is usually installed on the booster pump outlet pipeline, or the booster pump is removed from the aircraft system pipeline when performing ground maintenance on the aircraft system.

[0003] The solution of setting a one-way valve on the outlet pipeline of the aircraft system boost pump is to use the one-way valve to prevent the circulating medium from flowing back into the boost pump and causing damage to the boost pump when the aircraft system is maintained on the ground. This technical solution requires the installation of an additional one-way valve, which will increase the weight of the aircraft system, and the one-way valve is difficult to install when space is limited.

[0004] During ground maintenance of the aircraft system, the booster pump is removed from the aircraft system pipeline. After the ground maintenance of the aircraft system is completed, the booster pump is connected back to the aircraft system pipeline. The design takes into account the frequent disassembly and assembly of the booster pump in the aircraft system, which is complicated to operate, inefficient, and easy to cause pipeline wear and leakage.

[0005] This application is proposed in view of the above-mentioned technical defects. Summary of the invention

[0006] The purpose of the present application is to provide a one-way flow control structure for a pipeline used for ground maintenance of an aircraft system, so as to overcome or alleviate at least one of the technical defects of the known ones.

[0007] The technical solution of this application is:

[0008] A one-way flow control structure for a pipeline used for ground maintenance of an aircraft system, comprising:

[0009] Three-way valve, first nut, second nut, plugging cap, sealing adapter shaft, sealing ring, retaining ring;

[0010] The three-way valve has a first inlet, a second inlet and an outlet, wherein the outer wall of the first inlet has a first boss; the outlet on the three-way valve is connected to the aircraft system pipeline;

[0011] A first nut, having a first through hole at the top, is sleeved on the outer periphery of the first inlet of the three-way valve through the first through hole, is threadedly connected to the outlet pipeline of the booster pump in the aircraft system, and has its top pressed tightly on the first boss;

[0012] A second nut having a second through hole at a top end;

[0013] plug cap;

[0014] A sealed adapter shaft, the outer wall of which has a second boss, the interior of which has a flow channel, and the two ends are respectively a first end and a second end, wherein the flow channel extends to the end face of the first end; the outer wall of the second end has an annular flow groove, a plurality of flow holes, and a plurality of sealing grooves; each flow hole is distributed along the circumferential direction, connecting the flow channel and the annular flow groove; each sealing groove is distributed on one side of the annular flow groove close to the second end, and each sealing groove is provided with a sealing ring and two retaining rings, and the two retaining rings are distributed on both sides of the sealing ring;

[0015] The one-way flow control structure of the pipeline for ground maintenance of aircraft system has:

[0016] In the non-ground maintenance state, the plug cap blocks the second inlet of the three-way valve;

[0017] In the ground maintenance state, the second end of the sealing adapter shaft is inserted into the three-way valve from the second inlet of the three-way valve; the second nut is sleeved on the outer periphery of the sealing adapter shaft with the second through hole, is threadedly connected to the outer wall of the second inlet of the three-way valve, and the top end is pressed against the second boss to connect the annular flow groove to the outlet of the three-way valve; the first end of the sealing adapter shaft is connected to the outlet pipeline of the ground support equipment.

[0018] Optionally, in the above-mentioned one-way flow control structure for pipelines for ground maintenance of aircraft systems, the number of flow holes on the sealing adapter shaft is four;

[0019] The number of the sealing grooves on the sealing adapter shaft is two.

[0020] Optionally, in the above-mentioned one-way flow control structure for pipelines for ground maintenance of aircraft systems, the sealing ring is a rubber sealing ring;

[0021] The retaining ring is a fluoroplastic retaining ring.

[0022] Optionally, in the above-mentioned one-way flow control structure for ground maintenance pipelines of an aircraft system, a first inlet of the three-way valve is in conical contact with an outlet pipeline of a booster pump in the aircraft system.

[0023] Optionally, in the above-mentioned one-way flow control structure for aircraft system ground maintenance pipeline, when the one-way flow control structure for aircraft system ground maintenance pipeline is in a ground maintenance state, the second boss is in cooperative contact with the conical surface of the second inlet of the three-way valve.

[0024] Optionally, in the above-mentioned one-way flow control structure for the pipeline for ground maintenance of the aircraft system, the fourth boss on the outer wall of the plugging cap;

[0025] The one-way flow control structure of the pipeline for ground maintenance of the aircraft system also includes:

[0026] A fourth nut having a fourth through hole at a top end;

[0027] When the one-way flow control structure for the pipeline for ground maintenance of the aircraft system is in a non-ground maintenance state, the fourth nut is mounted on the outer periphery of the plugging cap with the fourth through hole, and can be threadedly connected to the outer wall of the second inlet of the three-way valve, with the top end pressed against the fourth boss, so that the conical surface between the second inlet of the three-way valve and the plugging cap is in contact with each other.

[0028] Optionally, the above-mentioned one-way flow control structure for pipelines for ground maintenance of aircraft systems further includes:

[0029] A third nut having a third through hole at a top end thereof;

[0030] When the one-way flow control structure for the ground maintenance pipeline of the aircraft system is in the ground maintenance state, the third nut is sleeved on the outlet pipeline of the ground support equipment with the third through hole, is threadedly connected to the outer wall of the first end of the sealing adapter shaft, and the top end is pressed against the third boss arranged on the outer wall of the outlet pipeline of the ground support equipment.

[0031] This application has at least the following beneficial technical effects:

[0032] Provided is a one-way flow control structure for ground maintenance of an aircraft system, wherein the one-way flow control structure for ground maintenance of an aircraft system has a corresponding structure designed around a three-way valve, and has a non-ground maintenance state and a ground maintenance state. In the non-ground maintenance state, the aircraft system can operate normally, and in the ground maintenance state, the aircraft system can be ground maintained without providing an additional one-way valve, and only a sealing adapter shaft is used in the ground maintenance state, which will not significantly increase the weight of the aircraft system. In addition, switching between the non-ground maintenance state and the ground maintenance state does not involve disassembly and assembly of a booster pump in the aircraft system, and the operation is convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic diagram of a one-way flow control structure for ground maintenance of an aircraft system provided by an embodiment of the present application in a non-ground maintenance state;

[0034] Figure 2 It is a schematic diagram of a one-way flow control structure for ground maintenance of an aircraft system provided by an embodiment of the present application in a ground maintenance state;

[0035] in:

[0036] 1-three-way valve; 2-first nut; 3-second nut; 4-blocking cap; 5-sealing adapter shaft; 6-sealing ring; 7-retaining ring; 8-fourth nut; 9-ground support equipment outlet pipeline; 10-fourth nut.

[0037] In order to better illustrate the present embodiment, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product. In addition, the drawings are only used for illustrative purposes and should not be construed as limitations on the present application. DETAILED DESCRIPTION

[0038] In order to make the technical solution and advantages of the present application clearer, the technical solution of the present application will be described in further detail in detail and in detail with reference to the accompanying drawings. It can be understood that the specific embodiments described here are only partial embodiments of the present application, which are only used to explain the present application, not to limit the present application. It should be noted that, for the convenience of description, only the parts related to the present application are shown in the accompanying drawings, and other related parts can refer to the general design.

[0039] In addition, unless otherwise defined, the technical terms or scientific terms used in the description of this application shall have the usual meanings understood by those of ordinary skill in the art to which this application belongs. The words used in the description of this application to indicate orientation are only used to indicate relative directions or positional relationships. When the absolute position of the described object changes, its relative positional relationship may also change accordingly. The word "include" used in the description of this application indicates that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, but does not exclude other elements or objects.

[0040] In addition, it should be noted that, unless otherwise clearly specified and limited, the words "installation", "connection" and similar terms used in the description of this application should be understood in a broad sense. For example, the connection can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. Technical personnel in the field can understand its specific meaning in this application according to the specific circumstances.

[0041] On the one hand, the present application provides a one-way flow control structure for a pipeline used for ground maintenance of an aircraft system, such as Figure 1-2 As shown, it includes a three-way valve 1, a first nut 2, a second nut 3, a plugging cap 4, a sealing adapter shaft 5, a sealing ring 6, a retaining ring 7, a third nut 8, and a fourth nut 10.

[0042] The three-way valve 1 has two inlets and one outlet, wherein the two inlets on the three-way valve 1 are respectively a first inlet and a second inlet; the outer wall of the first inlet has a first boss; the outlet on the three-way valve 1 is connected to the aircraft system pipeline and contacts with the conical surface between the aircraft system pipeline to ensure the sealing effect.

[0043] The top end of the first nut 2 has a first through hole, and the first through hole is sleeved on the outer periphery of the first inlet of the three-way valve 1, and is threadedly connected to the outlet pipeline of the booster pump in the aircraft system. The top end is pressed tightly on the first boss, so that the conical surfaces between the first inlet of the three-way valve 1 and the outlet pipeline of the booster pump are in contact with each other to ensure the sealing effect and facilitate disassembly and assembly.

[0044] The fourth boss on the outer wall of the plugging cap 4.

[0045] The top of the fourth nut 10 has a fourth through hole, and the fourth through hole is sleeved on the outer periphery of the plugging cap 4, which can be threadedly connected to the outer wall of the second inlet of the three-way valve 1, and the top is pressed tightly on the fourth boss, so that the second inlet of the three-way valve 1 and the conical surface of the plugging cap 4 are in contact with each other to ensure the sealing effect. At this time, the one-way flow control structure of the pipeline for ground maintenance of the aircraft system is in a non-ground maintenance state. The booster pump in the aircraft system can drive the circulating medium to enter the inside of the three-way valve 1 from the first inlet of the three-way valve 1, and then flow to the aircraft system pipeline through the outlet of the three-way valve 1, and the aircraft system can work normally, such as Figure 1 shown.

[0046] The top end of the second nut 3 has a second through hole.

[0047] The third nut 8 has a third through hole at its top end.

[0048] The outer wall of the sealing adapter shaft 5 has a second boss and a circulation channel inside, one end of which is the first end and the other end is the second end, wherein the circulation channel extends to the first end face; the outer wall of the second end has an annular circulation groove, multiple circulation holes, and multiple sealing grooves; each circulation hole is distributed along the circumferential direction, connecting the circulation channel and the annular circulation groove, and the specific number may be four; each sealing groove is distributed on one side of the annular circulation groove close to the second end, and the specific number may be two, and a sealing ring 6 and two retaining rings 7 are arranged in each sealing groove, and the two retaining rings 7 are distributed on both sides of the sealing ring 6.

[0049] The second end of the sealing adapter shaft 5 can be inserted into the three-way valve 1 from the second inlet of the three-way valve 1; the second nut 3 is sleeved on the outer circumference of the sealing adapter shaft 5 with a second through hole, and is threadedly connected to the outer wall of the second inlet of the three-way valve 1, and the top end is pressed on the second boss, so that the conical surface between the second boss and the second inlet of the three-way valve 1 is in contact with each other, and the annular flow groove is connected to the outlet of the three-way valve 1; the third nut 8 is sleeved on the ground support equipment outlet pipeline 9 with a third through hole, and is threadedly connected to the outer wall of the first end of the sealing adapter shaft 5, and the top end is pressed on the third boss provided on the outer wall of the ground support equipment outlet pipeline 9. At this time, the one-way flow control structure for ground maintenance of the aircraft system pipeline is in the ground maintenance state, and the ground support equipment can flow to the aircraft system pipeline through the flow channel, flow hole, annular flow groove on the sealing adapter shaft 5, and the outlet of the three-way valve 1 for ground maintenance, such as Figure 2As shown, the circulating medium is effectively blocked by the sealing adapter shaft 5 and cannot flow to the booster pump in the aircraft system, thereby protecting the booster pump from damage. In addition, the combined design of the sealing ring 6 and its retaining ring 7 can have a good sealing effect to prevent the circulating medium from leaking toward the booster pump of the aircraft system. The sealing ring 6 can be a rubber sealing ring, and the retaining ring 7 can be a fluoroplastic retaining ring.

[0050] After the ground maintenance of the aircraft system is completed, the sealing adapter shaft 5 and other related components can be removed from the three-way valve 1, and the plugging cap 4 can be installed on the three-way valve 1 to switch the one-way flow control structure of the pipeline for ground maintenance of the aircraft system from a non-ground maintenance state to a ground maintenance state, so that the aircraft system can work normally.

[0051] The one-way flow control structure for ground maintenance of aircraft systems disclosed in the above embodiments needs to consider the following aspects during the specific design:

[0052] The three-way valve 1 is designed according to the booster pump interface and system piping specifications, and sufficient space for two sealing grooves is reserved according to the requirements of the sealing ring 6, and the roughness requirements of the sealing ring 6 are met. The inner cone surface and external thread on the second inlet side are designed according to the standard for the installation and sealing of the sealing adapter shaft 5.

[0053] The sealing adapter shaft 5 is designed according to the size specifications of the three-way valve 1. The sealing adapter shaft 5 should be designed with a sufficiently large flow channel size to reduce flow resistance. The sealing groove and the sealing ring 6 are designed with reference to relevant sealing ring standards, and the elongation, compression and filling rate of the sealing ring 6 are calculated to ensure that the design meets the sealing requirements.

[0054] The second inlet side of the three-way valve 1 should be reasonably designed according to the installation environment and sealing requirements to facilitate maintenance and use.

[0055] In the one-way flow control structure for ground maintenance of the aircraft system disclosed in the above-mentioned embodiment, a corresponding structure is designed around the three-way valve 1, which has a non-ground maintenance state and a ground maintenance state. In the non-ground maintenance state, the aircraft system can work normally, and in the ground maintenance state, the aircraft system can be ground maintained without setting an additional one-way valve, and the sealing adapter shaft 5 is only used in the ground maintenance state, which will not significantly increase the weight of the aircraft system. In addition, switching between the non-ground maintenance state and the ground maintenance state does not involve the disassembly and assembly of the booster pump in the aircraft system, and the operation is convenient.

[0056] The one-way flow control method for ground maintenance of aircraft systems disclosed in the above-mentioned embodiments is implemented based on the one-way flow control structure for ground maintenance of aircraft systems disclosed in the above-mentioned embodiments. The description is relatively simple. For specific related matters, please refer to the relevant description of the one-way flow control structure for ground maintenance of aircraft systems. Its technical effects can also refer to the technical effects of the relevant parts of the one-way flow control structure for ground maintenance of aircraft systems, which will not be repeated here.

[0057] So far, the technical solution of the present application has been described in conjunction with the preferred embodiments shown in the accompanying drawings. Those skilled in the art should understand that the scope of protection of the present application is obviously not limited to these specific embodiments. Without departing from the principles of the present application, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the scope of protection of the present application.

Claims

1. A one-way flow control structure for pipelines used for ground maintenance of aircraft systems, characterized in that: include: A three-way valve (1), a first nut (2), a second nut (3), a plugging cap (4), a sealing adapter shaft (5), a sealing ring (6), and a retaining ring (7); A three-way valve (1) has a first inlet, a second inlet and an outlet, wherein the outer wall of the first inlet has a first boss; the upper outlet of the three-way valve (1) is connected to an aircraft system pipeline; A first nut (2) has a first through hole at the top end, is sleeved on the outer periphery of the first inlet of the three-way valve (1) through the first through hole, is threadedly connected to the outlet pipeline of the booster pump in the aircraft system, and has its top end pressed tightly against the first boss; A second nut (3) having a second through hole at the top end; Plug cap (4); A sealing adapter shaft (5) has a second boss on its outer wall and a circulation channel inside thereof, with two ends being a first end and a second end respectively, wherein the circulation channel extends to the end face of the first end; the outer wall of the second end has an annular circulation groove, a plurality of circulation holes, and a plurality of sealing grooves; each of the circulation holes is distributed along the circumferential direction and connects the circulation channel and the annular circulation groove; each of the sealing grooves is distributed on one side of the annular circulation groove close to the second end, and each of the sealing grooves is provided with a sealing ring (6) and two retaining rings (7), and the two retaining rings (7) are distributed on both sides of the sealing ring (6); The one-way flow control structure of the pipeline for ground maintenance of aircraft system has: In a non-ground maintenance state, the plugging cap (4) blocks the second inlet of the three-way valve (1); In the ground maintenance state, the second end of the sealing adapter shaft (5) is inserted into the three-way valve (1) from the second inlet of the three-way valve (1); the second nut (3) is sleeved on the outer circumference of the sealing adapter shaft (5) with the second through hole, and is threadedly connected to the outer wall of the second inlet of the three-way valve (1), and the top end is pressed against the second boss, so that the annular flow groove is connected to the outlet of the three-way valve (1); the first end of the sealing adapter shaft (5) is connected to the outlet pipeline (9) of the ground support equipment.

2. The one-way flow control structure for pipelines used for ground maintenance of aircraft systems according to claim 1, characterized in that: The number of the flow holes on the sealing adapter shaft (5) is four; The number of the sealing grooves on the sealing adapter shaft (5) is two.

3. The one-way flow control structure for pipelines used for ground maintenance of aircraft systems according to claim 1, characterized in that: The sealing ring (6) is a rubber sealing ring; The retaining ring (7) is a fluoroplastic retaining ring.

4. The one-way flow control structure for pipelines used for ground maintenance of aircraft systems according to claim 1, characterized in that: The first inlet of the three-way valve (1) is in conical contact with the outlet pipeline of the booster pump in the aircraft system.

5. The one-way flow control structure for pipelines used for ground maintenance of aircraft systems according to claim 1, characterized in that: When the one-way flow control structure for ground maintenance of an aircraft system pipeline is in a ground maintenance state, the second boss is in cooperative contact with the conical surface of the second inlet of the three-way valve (1).

6. The one-way flow control structure for pipelines used for ground maintenance of aircraft systems according to claim 1, characterized in that: A fourth boss on the outer wall of the plugging cap (4); The one-way flow control structure of the pipeline for ground maintenance of the aircraft system also includes: A fourth nut (10) having a fourth through hole at the top end; When the one-way flow control structure for ground maintenance of an aircraft system is in a non-ground maintenance state, the fourth nut (10) is sleeved on the outer periphery of the plugging cap (4) with the fourth through hole, and can be threadedly connected to the outer wall of the second inlet of the three-way valve (1), with the top end pressed tightly against the fourth boss, so that the conical surfaces between the second inlet of the three-way valve (1) and the plugging cap (4) are in contact with each other.

7. The one-way flow control structure for pipelines used for ground maintenance of aircraft systems according to claim 1, characterized in that: Also includes: A third nut (8) having a third through hole at a top end; When the one-way flow control structure for ground maintenance of an aircraft system is in a ground maintenance state, a third nut (8) is sleeved on a ground support equipment outlet pipeline (9) with a third through hole, is threadedly connected to the outer wall of the first end of a sealing adapter shaft (5), and the top end is pressed against a third boss provided on the outer wall of the ground support equipment outlet pipeline (9).

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