Switching catheter

Abstract

The utility model relates to an adapter conduit, including connecting pipe, first connecting sleeve, second connecting sleeve and two connecting nut, one end of connecting pipe forms with the horn mouth of reserved interface of hydraulic test equipment, the other end forms with connecting portion, the first connecting sleeve is sleeved on the connecting pipe and abuts against the horn mouth, and the second connecting sleeve is sleeved on the connecting pipe and abuts against the horn mouth. The second connecting sleeve is arranged on the connecting pipe in a sleeving mode and connected with the connecting part, an outer conical connecting face connected with a connector of the aircraft hydraulic accessory is formed at the end, away from the horn mouth, of the second connecting sleeve, and the two connecting nuts are arranged on the connecting pipe in a sleeving mode. The back-to-back sides of the two connecting nuts abut against the first connecting sleeve and the second connecting sleeve respectively and are connected with a reserved connector of hydraulic test equipment and a connector of an airplane hydraulic accessory, the whole switching guide pipe is designed in an assembled mode, connecting pipes of different specifications are replaced, corresponding accessories are configured, the switching guide pipe can adapt to the airplane hydraulic accessories of different models, and the switching guide pipe is convenient to use. Welding is not needed, the service life is long, and deformation is not prone to occurring.

Description

Technical Field

[0001] The utility model relates to the technical field of aircraft hydraulic accessory testing, in particular to a switching catheter. Background Art

[0002] When existing hydraulic test equipment is connected to the aircraft hydraulic area, it is usually connected using a transfer conduit due to mismatched sealing surfaces.

[0003] For example, the reserved interface of the existing hydraulic test equipment has The outer cone sealing surface of a certain type of aircraft hydraulic accessory interface has Inner cone sealing surface, for this purpose, the existing conduit is modified, specifically, one end of the conduit is welded with The conical joint with inner cone sealing surface, the other end of the conduit is welded with Conical fitting with external cone sealing surface.

[0004] However, pinholes are prone to appear in the welding parts, and they are easy to break during use. Utility Model Content

[0005] In view of this, it is necessary to provide a transfer catheter to solve the problem that the welding part of the existing transfer catheter is prone to sand holes and is prone to breakage during use.

[0006] The utility model provides a transition catheter, comprising a connecting pipe, a first connecting sleeve, a second connecting sleeve and two connecting nuts, wherein one end of the connecting pipe is formed with a bell mouth connected to a reserved interface of a hydraulic test device, and the other end is formed with a connecting portion, the first connecting sleeve is sleeved on the connecting pipe and abuts against the bell mouth, the second connecting sleeve is sleeved on the connecting pipe and connected to the connecting portion, an end of the second connecting sleeve away from the bell mouth is formed with an outer conical connecting surface connected to an interface of an aircraft hydraulic accessory, the two connecting nuts are sleeved on the connecting pipe, the opposite sides of the two connecting nuts are respectively abutted against the first connecting sleeve and the second connecting sleeve, and are connected to the reserved interface of the hydraulic test device and the interface of the aircraft hydraulic accessory.

[0007] Furthermore, a side of the bell mouth close to the connecting portion is an abutting surface, and a side of the first connecting sleeve close to the bell mouth is formed with a bell-shaped pushing surface, and the abutting surface abuts against the pushing surface.

[0008] Furthermore, a first step is formed on the outer wall of the first connecting sleeve, and the first step abuts against the connecting nut.

[0009] Furthermore, the diameter of the first step of the first connecting sleeve decreases in a direction approaching the second connecting sleeve.

[0010] Furthermore, an annular groove is formed on the inner wall of the second connecting sleeve, and the connecting portion is an annular protrusion, which can be embedded in the annular groove.

[0011] Furthermore, the diameter of the annular protrusion gradually increases from both sides toward the middle.

[0012] Furthermore, a second step is formed on the outer wall of the second connecting sleeve, and the second step abuts against the connecting nut.

[0013] Furthermore, the diameter of the second step of the second connecting sleeve decreases in a direction approaching the first connecting sleeve.

[0014] Compared with the prior art, the bell mouth of the connecting pipe is facing the reserved interface of the hydraulic test equipment, so that the connecting nut is connected to the reserved interface of the hydraulic test equipment. In the above process, the connecting nut pushes the first connecting sleeve to press the bell mouth to the reserved interface of the hydraulic test equipment, thereby completing the connection process with the hydraulic test equipment. At the same time, the outer conical connecting surface of the second connecting sleeve is inserted into the interface of the aircraft hydraulic accessory, and another connecting nut is connected to the interface of the aircraft hydraulic accessory. In the above process, the connecting nut pushes the second connecting sleeve to press on the interface of the aircraft hydraulic accessory, thereby completing the connection process with the aircraft hydraulic accessory. The entire adapter catheter is of an assembled design. By replacing connecting pipes of different specifications and configuring corresponding accessories, it can adapt to different models of aircraft hydraulic accessories. No welding is required, it has a long service life and is not easy to deform. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A schematic diagram of the overall external structure of the transfer catheter provided in an embodiment of the utility model;

[0016] Figure 2 A cross-sectional view of the entire transfer catheter provided by an embodiment of the utility model;

[0017] Figure 3 The switching catheter provided by the embodiment of the utility model Figure 2 The enlarged schematic diagram of the middle A part;

[0018] Figure 4 The switching catheter provided by the embodiment of the utility model Figure 2 Enlarged schematic diagram of part B in the middle. DETAILED DESCRIPTION

[0019] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of the present application and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not used to limit the scope of the present invention.

[0020] like Figure 1-2 As shown, the utility model provides a transfer catheter, including a connecting pipe 100, a first connecting sleeve 200, a second connecting sleeve 300 and two connecting nuts 400, one end of the connecting pipe 100 is formed with a bell mouth 110 connected to a reserved interface of a hydraulic test device, and the other end is formed with a connecting portion, the first connecting sleeve 200 is sleeved on the connecting pipe 100 and abuts against the bell mouth 110, the second connecting sleeve 300 is sleeved on the connecting pipe 100 and connected to the connecting portion, an end of the second connecting sleeve 300 away from the bell mouth 110 is formed with an outer conical connecting surface 310 connected to an interface of an aircraft hydraulic accessory, two connecting nuts 400 are sleeved on the connecting pipe 100, and the opposite sides of the two connecting nuts 400 are respectively abutted against the first connecting sleeve 200 and the second connecting sleeve 300, and are connected to the reserved interface of the hydraulic test device and the interface of the aircraft hydraulic accessory.

[0021] During implementation, the bell mouth 110 of the connecting pipe 100 is facing the reserved interface of the hydraulic test equipment, so that the connecting nut 400 is connected to the reserved interface of the hydraulic test equipment. In the above process, the connecting nut 400 pushes the first connecting sleeve 200 to press the bell mouth 110 to the reserved interface of the hydraulic test equipment, thereby completing the connection process with the hydraulic test equipment. At the same time, the outer conical connecting surface 310 of the second connecting sleeve 300 is inserted into the interface of the aircraft hydraulic accessory, and another connecting nut 400 is connected to the interface of the aircraft hydraulic accessory. In the above process, the connecting nut 400 pushes the second connecting sleeve 300 to press on the interface of the aircraft hydraulic accessory, thereby completing the connection process with the aircraft hydraulic accessory. The entire adapter catheter is of an assembled design. By replacing connecting pipes 100 of different specifications and configuring corresponding accessories, it can be adapted to different models of aircraft hydraulic accessories. No welding is required, it has a long service life and is not easy to deform.

[0022] In this embodiment, a bell mouth 110 connected to a reserved interface of a hydraulic test device is formed at one end of the connecting pipe 100, and a connecting portion is formed at the other end.

[0023] like Figure 3 As shown, the first connecting sleeve 200 in this embodiment is sleeved on the connecting pipe 100 and abuts against the bell mouth 110 .

[0024] In one embodiment, a side of the bell mouth 110 close to the connection portion is an abutting surface 111 , and a side of the first connecting sleeve 200 close to the bell mouth 110 is formed with a bell-shaped pushing surface 210 , and the abutting surface 111 abuts against the pushing surface 210 .

[0025] In one embodiment, a first step 220 is formed on the outer wall of the first connecting sleeve 200 , and the first step 220 abuts against the connecting nut 400 .

[0026] The diameter of the first step 220 of the first connecting sleeve 200 decreases in a direction approaching the second connecting sleeve 300 .

[0027] like Figure 3 As shown in , the conical inner wall of the connecting pipe 100 is closely attached to the reserved interface of the hydraulic test equipment to achieve a sealing function between the two.

[0028] like Figure 4 As shown, the second connecting sleeve 300 in this embodiment is sleeved on the connecting pipe 100 and connected to the connecting portion, and an end of the second connecting sleeve 300 away from the bell mouth 110 is formed with an outer conical connecting surface 310 connected to the interface of the aircraft hydraulic accessory.

[0029] In one embodiment, an annular groove 320 is formed on the inner wall of the second connecting sleeve 300 , and the connecting portion is an annular protrusion that can be embedded in the annular groove 320 .

[0030] The diameter of the annular protrusion gradually increases from both sides to the middle, so as to facilitate the annular protrusion to enter and exit the annular groove 320. It can be understood that the number of the annular protrusions can be set to multiple.

[0031] In one embodiment, a second step 330 is formed on the outer wall of the second connecting sleeve 300 , and the second step 330 abuts against the connecting nut 400 .

[0032] The diameter of the second step 330 of the second connecting sleeve 300 decreases in a direction approaching the first connecting sleeve 200 .

[0033] like Figure 4 As shown, the conical outer wall of the second connecting sleeve 300 is closely attached to the interface of the aircraft hydraulic accessory to achieve a sealing function between the two.

[0034] Compared with the prior art: the bell mouth 110 of the connecting pipe 100 is facing the reserved interface of the hydraulic test equipment, so that the connecting nut 400 is connected to the reserved interface of the hydraulic test equipment. In the above process, the connecting nut 400 pushes the first connecting sleeve 200 to press the bell mouth 110 to the reserved interface of the hydraulic test equipment, thereby completing the connection process with the hydraulic test equipment. At the same time, the outer conical connecting surface 310 of the second connecting sleeve 300 is inserted into the interface of the aircraft hydraulic accessory, and another connecting nut 400 is connected to the interface of the aircraft hydraulic accessory. In the above process, the connecting nut 400 pushes the second connecting sleeve 300 to press on the interface of the aircraft hydraulic accessory, thereby completing the connection process with the aircraft hydraulic accessory. The entire adapter catheter is an assembled design. By replacing connecting pipes 100 of different specifications and configuring corresponding accessories, it can be adapted to aircraft hydraulic accessories of different models. No welding is required, the service life is long, and it is not easy to deform.

[0035] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by any technician familiar with the technical field within the technical scope disclosed in the present invention should be included in the protection scope of the present invention.

Claims

1. A switching catheter, characterized in that: include: A connecting pipe, one end of which is formed with a bell mouth connected to a reserved interface of the hydraulic test equipment, and the other end of which is formed with a connecting portion; A first connecting sleeve, which is sleeved on the connecting pipe and abuts against the bell mouth; A second connecting sleeve, which is sleeved on the connecting pipe and connected to the connecting portion, wherein an end of the second connecting sleeve away from the bell mouth is formed with an outer conical connecting surface connected to an interface of an aircraft hydraulic accessory; Two connecting nuts are both sleeved on the connecting pipe, and the opposite sides of the two connecting nuts are respectively abutted against the first connecting sleeve and the second connecting sleeve, and are connected to the reserved interface of the hydraulic test equipment and the interface of the aircraft hydraulic accessories.

2. The switching catheter according to claim 1, characterized in that: The side of the bell mouth close to the connecting portion is abutting surface, and the side of the first connecting sleeve close to the bell mouth is formed with a bell-shaped pushing surface, and the abutting surface abuts against the pushing surface.

3. The switching catheter according to claim 1, characterized in that: A first step is formed on the outer wall of the first connecting sleeve, and the first step abuts against the connecting nut.

4. The switching catheter according to claim 3, characterized in that: The diameter of the first step of the first connecting sleeve decreases in a direction approaching the second connecting sleeve.

5. The switching catheter according to claim 1, characterized in that: An annular groove is formed on the inner wall of the second connecting sleeve, and the connecting portion is an annular protrusion, which can be embedded in the annular groove.

6. The switching catheter according to claim 5, characterized in that: The diameter of the annular protrusion gradually increases from both sides toward the middle.

7. The adapter catheter according to claim 1, characterized in that: A second step is formed on the outer wall of the second connecting sleeve, and the second step abuts against the connecting nut.

8. The switching catheter according to claim 7, characterized in that: The diameter of the second connecting sleeve at the second step decreases in a direction approaching the first connecting sleeve.

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