High-pressure two-way sealing pipeline with adjustable spacing

Abstract

The invention discloses a high-pressure two-way sealing pipeline with an adjustable interval. The high-pressure two-way sealing pipeline comprises a fixed joint, a metal pipeline and a jacket nut, the metal pipeline is in threaded connection with the fixing connector and can axially move in the fixing connector, and the other end of the metal pipeline is movably connected with the outer sleeve nut in a sleeved mode and can axially move in the outer sleeve nut in one direction. The high-pressure pipeline is good in use effect, and the harsh requirement of a traditional fixed-distance high-pressure pipeline for the installation precision is met; the welding-free design is adopted, so that the mechanical environments such as vibration resistance and impact resistance are better; the thickness of the metal pipeline can be adjusted according to needs, and the metal pipeline can serve as a force bearing component when necessary. And a plurality of layers of sealing rings are adopted for sealing, so that zero leakage under the ultrahigh pressure condition is ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of hydraulic pneumatic, in particular to a high-pressure bidirectional sealing pipeline with adjustable spacing. BACKGROUND

[0002] At present, the connection of gas path and liquid path over 35MPa mainly relies on metal pipeline. In the case of small flow diameter, the spring pipe or small diameter metal pipe can be used for connection. In this case, the spring pipe or small diameter metal pipe can be flexibly adjusted under external force in the case of fixed two ends. However, when the flow diameter is large or the metal pipeline needs to bear force, the bending and stretching resistance of the metal pipeline will be greatly improved, so that free flexible adjustment cannot be realized, and the pipeline is usually connected in the form of matching. SUMMARY

[0003] The technical problem to be solved by the present application is to overcome the defects of the prior art, provide a high-pressure bidirectional sealing pipeline with adjustable spacing, effectively compensate for manufacturing errors under the condition of reliable sealing, realize accurate positioning of the two ends of the pipeline, have excellent mechanical environment performance, and be especially suitable for the parts requiring high-pressure connection of high-pressure gas path and liquid path in aviation and aerospace, so as to effectively solve the problems in the background art.

[0004] To achieve the above-mentioned purpose, the present application provides the following technical scheme: a high-pressure bidirectional sealing pipeline with adjustable spacing, comprising a fixed joint, a metal pipeline and a sleeve nut; the metal pipeline is threadedly connected with the fixed joint and can move axially in the fixed joint, and the other end of the metal pipeline is movably sleeved with the sleeve nut and can move axially in the sleeve nut in one direction.

[0005] Preferably, the opening of the metal pipeline near one end is provided with an external thread segment, and the fixed joint has an internal thread for threadedly connecting with the external thread segment.

[0006] Preferably, the external thread segment is further threadedly connected with a locking nut, and the locking nut abuts against the end face of the fixed joint.

[0007] Preferably, the fixed joint has an external thread connection segment, the external thread connection segment is sleeved with an O-shaped sealing ring, the opening end of the metal pipeline is clearance-fitted with the external thread connection segment, and the opening end of the metal pipeline is provided with at least one mounting groove, and the mounting groove is provided with a sealing ring I abutting against the inner wall of the external thread connection segment.

[0008] Preferably, the opening of the metal pipeline near the other end is provided with a check ring; the sleeve nut has a through hole and an internal thread hole communicated with the axis, the internal diameter of the internal thread hole is greater than the diameter of the check ring, the diameter of the check ring is greater than the internal diameter of the through hole, and the internal diameter of the through hole is greater than the large diameter of the external thread segment.

[0009] Preferably, the metal pipeline is provided with at least one mounting groove near the opening end of the check ring, and a sealing ring II is arranged in the mounting groove.

[0010] Preferably, the side of the check ring in contact with the bottom of the internally threaded hole is provided with a sealing ring III.

[0011] Preferably, the two opening ends of the metal pipeline are on the same axis, and the body of the metal pipeline is further provided with a polygonal prism.

[0012] Compared with the prior art, the beneficial effects of the present application are as follows: the fixed joint is installed in place on one side, the axial distance between the metal pipeline and the fixed joint is adjusted until the check ring on the metal pipeline is in contact with the sleeve nut, at this time the locking nut is locked on the fixed joint 1, that is, the reliable connection between the two devices is completed; the harsh requirement of traditional fixed distance high-pressure pipeline on installation precision is solved; the welding-free design is better in vibration resistance, impact resistance and other mechanical environments; the thickness of the metal pipeline can be adjusted according to the requirements, and if necessary, it can be used as a force bearing component; in addition, multiple sealing rings are used for sealing to ensure zero leakage under superhigh pressure. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 is a structural schematic diagram of the present application; Figure 2 is a structural schematic diagram of the fixed joint of the present application; Figure 3 is a structural schematic diagram of the metal pipeline of the present application; Figure 4 is a structural schematic diagram of the sleeve nut of the present application; Figure 5 is a structural schematic diagram of the overall structure of the present application.

[0014] In the figure: 1 fixed joint, 1.1 externally threaded connection section, 1.2 O-shaped sealing ring, 1.3 internally threaded hole, 2 locking nut, 3 metal pipeline, 3.1 sealing ring I, 3.2 externally threaded section, 3.3 check ring, 3.4 polygonal prism, 3.5 sealing ring III, 3.6 sealing ring II, 4 sleeve nut, 4.1 through hole, 4.2 internally threaded hole. DETAILED DESCRIPTION

[0015] The present application can be explained in detail by the following examples, and the purpose of the present application is to protect all technical improvements within the scope of the present application. In the description of the present application, it should be understood that the orientation or position relationship indicated by terms such as "up", "down", "front", "back", "left", "right" and the like only corresponds to the drawings of the present application, and is not intended to indicate or imply that the devices or elements referred to must have a particular orientation.

[0016] Please refer to Figures 1-5 The present application provides the following technical solutions: Embodiment 1: An adjustable pitch high-pressure bidirectional sealing pipeline, comprising a fixed joint 1, a metal pipeline 3 and a sleeve nut 4; the metal pipeline 3 is threadedly connected with the fixed joint 1 and can move axially in the fixed joint 1, and the other end of the metal pipeline 3 is movably sleeved with the sleeve nut 4 and can move axially in the sleeve nut 4 towards one direction; Further, the opening of the metal pipeline 3 close to one end is provided with an external thread segment 3.2, the fixed joint 1 is provided with an internal thread 1.3 threadedly connected with the external thread segment 3.2, the external thread segment 3.2 is threadedly connected with the fixed joint 1 and can move axially in the fixed joint 1 for adjustment as required; the external thread segment 3.2 is further threadedly connected with a locking nut 2, the locking nut 2 is in abutment with the end face of the fixed joint 1, and the metal pipeline 3 and the fixed joint 1 are fastened by the locking nut 2 to ensure the stability of the connection; Further, the fixed joint 1 is provided with an external thread connection segment 1.1, the external thread connection segment 1.1 is sleeved with an O-shaped sealing ring 1.2, the opening end of the metal pipeline 3 is in clearance fit with the external thread connection segment 1.1, and the opening end of the metal pipeline 3 is provided with at least one mounting groove, the mounting groove is provided with a sealing ring I 3.1 abutting with the inner wall of the external thread connection segment 1.1, and the sealing ring I 3.1 provided at the opening end of the metal pipeline 3 ensures no leakage and guarantees the sealing performance; Further, the opening of the metal pipeline 3 close to the other end is provided with a check ring 3.3; the sleeve nut 4 is provided with a through hole 4.1 and an internal thread hole 4.2 in communication along the axis, the internal diameter of the internal thread hole 4.2 is greater than the diameter of the check ring 3.3, the diameter of the check ring 3.3 is greater than the internal diameter of the through hole 4.1, and the check ring 3.3 is located in the internal thread hole 4.2 and in abutment with the end portion of the through hole 4.1, effectively avoiding the metal pipeline 3 from coming out of the sleeve nut 4; It should be noted that the internal diameter of the through hole 4.1 is greater than the large diameter of the external thread segment 3.2, that is, the metal pipeline 3 can be inserted into the sleeve nut 4; The opening end of the metal pipeline 3 close to the check ring 3.3 is provided with at least one mounting groove, and the mounting groove is provided with a sealing ring II 3.6 to ensure no leakage and guarantee the sealing performance; In addition, the two opening ends of the metal pipeline 6 are on the same axis to meet the requirement of installation accuracy.

[0017] Embodiment 2: Different from embodiment 1, the side of the check ring 3.3 in contact with the bottom of the internal thread hole 4.2 is provided with a sealing ring III 3.5, and the sealing ring III 3.5 plays a sealing role when the check ring 3.3 abuts with the sleeve nut 4, further enhancing the sealing effect.

[0018] Embodiment 3: Different from embodiment 1, the pipe body of the metal pipeline 6 is further provided with a multi-prism 3.4, specifically a quadrangular prism or a hexagonal prism, facilitating the rotation of the metal pipeline 3 and the position adjustment.

[0019] The present application is not limited to the details of the foregoing exemplary embodiments, which are presented for the purpose of illustration and are not intended to limit the scope of the application, which is defined with reference to the following claims.

Claims

1. An adjustable pitch high pressure bidirectional seal line, characterized by: Including fixed joint (1), metal pipeline (3) and sleeve nut (4), metal pipeline (3) is connected with fixed joint (1) threadedly, and can move axially in fixed joint (1), and the other end of metal pipeline (3) is movably sleeved with sleeve nut (4), and can move axially in sleeve nut (4) towards one direction.

2. A high pressure bidirectional seal line of variable distance according to claim 1, characterized in that: The opening of metal pipeline (3) close to one end is provided with external thread section (3.2), and fixed joint (1) has internal thread (1.3) for threadedly connecting with external thread section (3.2).

3. A high pressure bidirectional seal line of variable length according to claim 1, characterized in that: The external thread section (3.2) is also threadedly connected with locking nut (2), and locking nut (2) is in contact with the end face of fixed joint (1).

4. The adjustable pitch high pressure bidirectional seal line of claim 1, wherein: The fixed joint (1) has external thread connection section (1.1), and external thread connection section (1.1) is sleeved with O-shaped sealing ring (1.2), the opening end of metal pipeline (3) is in clearance fit with external thread connection section (1.1), and the opening end of the metal pipeline (3) is provided with at least one mounting groove, and sealing ring I (3.1) is arranged in the mounting groove and is in fit with the inner wall of external thread connection section (1.1).

5. The adjustable pitch high pressure bidirectional seal line of claim 2, wherein: The opening of metal pipeline (3) close to the other end is provided with stop ring (3.3), and the axis of sleeve nut (4) has communicating through hole (4.1) and internal thread hole (4.2), the inner diameter of internal thread hole (4.2) is greater than the diameter of stop ring (3.3), the diameter of stop ring (3.3) is greater than the inner diameter of through hole (4.1), and the inner diameter of through hole (4.1) is greater than the large diameter of external thread section (3.2).

6. A high pressure bidirectional seal line of variable length according to claim 5, characterized in that: The opening end of metal pipeline (3) close to stop ring (3.3) is provided with at least one mounting groove, and sealing ring II (3.6) is arranged in the mounting groove.

7. A high pressure bidirectional seal line of variable length according to claim 5, characterized in that: The side of stop ring (3.3) in contact with the bottom of internal thread hole (4.2) is provided with sealing ring III (3.5).

8. The adjustable pitch high pressure bidirectional seal line of claim 1, wherein: The openings of metal pipeline (6) at two ends are on the same axis, and the pipe body of metal pipeline (6) is also provided with multi-prism (3.4).

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