Rapid extrusion type flaring-free pipe sleeve

Abstract

The utility model provides a quick extrusion type flaring-free pipe sleeve, which relates to the technical field of aviation hydraulic pipeline sealing joints, and comprises an outer contour and an inner contour, the outer contour is provided with a first arc, and a first conical surface, a second conical surface and a third conical surface on two sides of the first arc; the first conical surface is tightly attached to the 24-degree conical surface under the action of the 24-degree conical surface rigid body, and a sealing area is formed. The rolling type flaring-free pipe sleeve has smaller size and lighter weight, can be connected with a guide pipe in a narrow space, and is reduced in weight by 14.5%-21.2% and shortened in length by 23.3%-27% compared with an existing rolling type flaring-free pipe sleeve; the first conical surface and the second conical surface are in elastic-plastic deformation under the action of a 24-degree conical surface rigid body, the outer surface of the first conical surface changes gently, the deformed outer surface is more attached to the 24-degree conical surface, and sealing connection higher in strength and better in stability is formed. The multiple annular grooves are provided with shear angles, so that the connecting strength and the fitting degree of the pipe sleeve and the guide pipe are improved, and oil leakage and oil seepage faults of a hydraulic pipeline are reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to aviation hydraulic pipeline sealing joint technical field especially relates to a quick extrusion type no flaring pipe sleeve. BACKGROUND

[0002] At present, the 24° conical no flaring pipe sleeve and the pipe between the aviation hydraulic pipeline system in domestic mainly adopt three connection modes: welding, internal extrusion connection and internal rolling connection.

[0003] The welding type no flaring pipe sleeve requires higher welding process and needs to carry out nondestructive testing after welding. The internal extrusion type pipe sleeve needs to be frequently replaced due to the strength limitation of the formed polyurethane, and can only be applied to the low-strength aluminum alloy pipe and low-strength stainless steel pipe, and cannot be applied to the high-strength stainless steel pipe and titanium alloy pipe commonly used on the present aircraft. The internal rolling pipe sleeve overcomes the above two problems, but needs to use a professional rolling expander, a fixed mold and a corresponding torque control device, and different expanders need to be replaced for pipes with the same outer diameter and different wall thicknesses, which requires higher operating personnel.

[0004] Based on this, the application provides a new quick extrusion type no flaring pipe sleeve to solve the above problems. CONTENT OF THE UTILITY MODEL

[0005] The utility model provides a quick extrusion type no flaring pipe sleeve, which solves the technical problems that the existing pipe sleeve can only be applied to low-strength aluminum alloy pipes and low-strength stainless steel pipes and is complex to replace.

[0006] To achieve the above purpose, the utility model takes the technical scheme that:

[0007] A quick extrusion type no flaring pipe sleeve, comprising an outer contour and an inner contour, wherein the outer contour is provided with a first circular arc, a first taper surface, a second taper surface and a third taper surface on both sides of the first circular arc; and the first taper surface is tightly combined with the 24° taper surface to form a sealing area under the action of the 24° taper surface rigid body.

[0008] Further, the inner contour is provided with a plurality of annular grooves, the width of the annular grooves ranges from 0.5mm to 1mm, and the distance between adjacent annular grooves ranges from 0.2mm to 0.5mm.

[0009] Further, the annular grooves are provided with a shear angle, the angle of the shear angle ranges from 15° to 35°, and the edge of the shear angle is provided with a plurality of sharp corners.

[0010] Further, the inner contour is provided with a square cross-section ring groove on the side close to the first taper surface, the width of the square cross-section ring groove ranges from 0.4mm to 1.5mm, and the depth of the square cross-section ring groove ranges from 0.4mm to 1.5mm.

[0011] Further, the first taper surface has a diameter larger at one end close to the first circular arc than at the other end, and a conical angle ranging from 1° to 5°; the first taper surface has a thickness ranging from 0.6 mm to 1.2 mm.

[0012] Further, the second taper surface has a diameter larger at one end close to the first circular arc than at the other end, and a conical angle ranging from 90° to 120°.

[0013] Further, the third taper surface has a diameter larger at one end close to the proximal end of the second taper surface than at the other end, and a conical angle ranging from 2° to 12°.

[0014] Further, the first circular arc, the first taper surface, the second taper surface and the third taper surface are sprayed with a dry film lubricating coating, the coating has a thickness of 5 μm to 15 μm, and the dry film mainly comprises molybdenum disulfide.

[0015] Further, the inner contour has a Teflon coating on the inner surface close to the side of the third taper surface, the coating has a thickness of 10 μm to 40 μm, and the Teflon mainly comprises polytetrafluoroethylene.

[0016] Further, the total length A of the sleeve ranges from 10 mm to 15 mm, the length B of the first taper surface ranges from 3.5 mm to 5 mm, the length C of the second taper surface ranges from 1.5 mm to 2.5 mm, and the length D of the third taper surface ranges from 2 mm to 3 mm.

[0017] The utility model discloses the beneficial effect lies in:

[0018] 1, the utility model discloses smaller size and lighter weight can be completed in the narrow space and the connection of pipe, compared with the existing rolling type no flaring sleeve, the weight reduces 14.5% to 21.2%, and the length shortens 23.3% to 27%;

[0019] 2, the utility model and 24 ° taper surface rigid body effect under the occurrence of elastic plastic deformation, because the first taper surface outer surface changes gently, and the deformed outer surface is more close to 24 ° taper surface, and forms a higher strength and better stability sealing connection.

[0020] 3, the utility model discloses the multiple annular grooves of being provided with shear angle increase the connection strength and the close degree of sleeve and pipe, and reduce the oil leakage, oil seepage failure of hydraulic pipeline. DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present application or the technical solutions of the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description, obviously, the drawings described in the following are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the premise of the drawings.

[0022] Figure 1 It is a structural schematic diagram of the outer contour of the present application.

[0023] Figure 2 It is a structural schematic diagram of the inner contour of the present application.

[0024] Figure 3 It is Figure 2 The middle partial enlarged view.

[0025] Figure 4 It is a schematic diagram of extrusion of the present application and 24° conical rigid body.

[0026] Explanation of reference numerals:

[0027] 1, outer contour; 11, first conical surface; 12, second conical surface; 13, third conical surface; 14, first circular arc; 2, inner contour; 21, annular groove; 211, shearing angle; 212, sharp angle; 22, square cross-section ring groove; 23, 24° conical rigid body; 24, dry film lubricating coating; 25, Teflon coating; 3, sealing area. DETAILED DESCRIPTION

[0028] It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0029] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme in the embodiments of the present application will be described clearly and completely below in combination with the drawings of the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, not all the embodiments. The description of the at least one exemplary embodiment is actually only illustrative, and by no means as any limitation on the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0030] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to the present invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0031] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0032] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.

[0033] This utility model provides a technical solution: a quick-extrusion type non-flaring tube sleeve, such as... Figures 1-4 As shown, it includes an outer contour 1 and an inner contour 2. Both the outer contour 1 and the inner contour 2 are bodies of revolution. The outer contour 1 is provided with a first arc 14 and a first conical surface 11, a second conical surface 12 and a third conical surface 13 on both sides of the first arc 14. Under the action of the 24° conical rigid body 23, the first conical surface 11 is tightly fitted with the 24° conical surface to form a sealing area 3.

[0034] A quick-extrusion non-flaring tube sleeve has a total length A between 10mm and 15mm, a first conical surface 11 with a length B between 3.5mm and 5mm, a second conical surface 12 with a length C between 1.5mm and 2.5mm, and a third conical surface 13 with a length D between 2mm and 3mm.

[0035] The center O of the first arc 14 coincides with the central axis of the solid of revolution;

[0036] The first taper surface 11 has a large diameter at the proximal end and a small diameter at the distal end, a conical angle of 1°-5°, and a surface roughness Ra≤0.8 μm;

[0037] The first taper surface 11 has a thickness of 0.6 mm-1.2 mm;

[0038] The second taper surface 12 has a large diameter at the proximal end and a small diameter at the distal end, a conical angle of 90°-120°, and a surface roughness Ra≤3.2 μm;

[0039] The third taper surface 13 has a large diameter at the proximal end and a small diameter at the distal end, a conical angle of 2°-12°, and a surface roughness Ra≤3.2 μm;

[0040] The sealing area 3 is a "line-surface" seal, the first taper surface 11 is plastically deformed under the action of the 24° taper rigid body 23, the first taper surface 11 is axially contracted, a combined surface of taper and arc is formed, and finally tightly adheres to the 24° taper rigid body 23;

[0041] The inner contour 2 is provided with a plurality of annular grooves 21, the width of the annular groove 21 is 0.5 mm-1 mm, and the distance between adjacent annular grooves 21 is 0.2 mm-0.5 mm;

[0042] The annular groove 21 is provided with a shear angle 211, the shear angle 211 has an angle of 15°-35°, is located in the range of the first arc 14, and is close to the first taper surface 11;

[0043] The shear angle 211 edge is provided with a plurality of sharp corners 212;

[0044] The inner contour 2 is provided with a square cross-section ring groove 22 on the side close to the first taper surface 11, the width is 0.4 mm-1.5 mm, and the depth is 0.4 mm-1.5 mm;

[0045] The outer contour 1 is sprayed with a dry film lubricating coating 24, and the coating thickness is 5 μm-18 μm;

[0046] The main component of the dry film lubricating coating 24 is molybdenum disulfide;

[0047] The inner contour 2 is sprayed with a Teflon coating 25 on the inner surface of the side close to the third taper surface 13, and the coating thickness is 10 μm-40 μm; the main component of the Teflon coating 25 is polytetrafluoroethylene;

[0048] Both the dry film lubricating coating 24 and the Teflon coating 25 have very low friction coefficients.

[0049] The above merely describes a preferred embodiment of the present application, and the protection scope of the present application is not limited thereto, and any skilled person in the art, according to the technical scheme and inventive concept of the present application, can make equivalent substitutions or changes within the technical range disclosed by the present application, which should be encompassed in the protection scope of the present application.

Claims

1. A quick-extrusion non-flaring tube sleeve, characterized in that, It includes an outer contour (1) and an inner contour (2). The outer contour (1) is provided with a first arc (14) and a first conical surface (11), a second conical surface (12) and a third conical surface (13) on both sides of the first arc (14). Under the action of the 24° conical rigid body (23), the first conical surface (11) is closely fitted with the 24° conical surface to form a sealed area (3).

2. The rapid extrusion type non-flaring sleeve according to claim 1, characterized in that, The inner contour (2) is provided with multiple annular grooves (21), the width of the annular grooves (21) is in the range of 0.5mm to 1mm, and the distance between adjacent annular grooves (21) is in the range of 0.2mm to 0.5mm.

3. The rapid extrusion type non-flaring sleeve according to claim 2, characterized in that, The annular groove (21) is provided with a shear angle (211), the angle range of which is 15° to 35°, and the edge of the shear angle (211) is provided with multiple sharp corners (212).

4. The rapid extrusion type non-flaring sleeve according to claim 2, characterized in that, The inner contour (2) is provided with a square cross-section annular groove (22) on the side near the first conical surface (11), with a width between 0.4 mm and 1.5 mm and a depth between 0.4 mm and 1.5 mm.

5. The rapid extrusion type non-flaring sleeve according to claim 1, characterized in that, The diameter of the first conical surface (11) near the first arc (14) is larger than the diameter of the other end, and the cone angle ranges from 1° to 5°; the thickness of the first conical surface (11) ranges from 0.6 mm to 1.2 mm.

6. The rapid extrusion type non-flaring sleeve according to claim 1, characterized in that, The diameter of the second conical surface (12) near the first arc (14) is larger than the diameter of the other end, and the cone angle ranges from 90° to 120°.

7. The rapid extrusion type non-flaring sleeve according to claim 1, characterized in that, The diameter of the end of the third conical surface (13) near the second conical surface (12) is larger than the diameter of the other end, and the cone angle ranges from 2° to 12°.

8. The rapid extrusion type non-flaring sleeve according to claim 1, characterized in that, The first arc (14), the first conical surface (11), the second conical surface (12) and the third conical surface (13) are coated with a dry film lubricating coating (24), the coating thickness is 5μm to 15μm, and the main component of the dry film is molybdenum disulfide.

9. The rapid extrusion type non-flaring sleeve according to claim 1, characterized in that, The inner surface of the inner contour (2) near the third cone surface (13) has a Teflon coating (25) with a thickness of 10μm to 40μm. The main component of Teflon is polytetrafluoroethylene.

10. The rapid extrusion type non-flaring sleeve according to claim 1, characterized in that, The total length A of the sleeve ranges from 10mm to 15mm, the length B of the first conical surface (11) ranges from 3.5mm to 5mm, the length C of the second conical surface (12) ranges from 1.5mm to 2.5mm, and the length D of the third conical surface (13) ranges from 2mm to 3mm.

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