CN216692532U

CN216692532U - Non-flaring pipeline connecting piece

Info

Publication number: CN216692532U
Application number: CN202220266905.3U
Authority: CN
Inventors: 孟丽莉; 尹昱力; 任广言; 陈琳
Original assignee: Xiyue Aviation Technology Shanghai Co ltd
Current assignee: Xiyue Aviation Technology Shanghai Co ltd
Priority date: 2022-02-10
Filing date: 2022-02-10
Publication date: 2022-06-07
Anticipated expiration: 2032-02-10

Abstract

The utility model relates to the technical field of pipeline connection of aviation hydraulic systems, in particular to a flareless pipeline connecting piece, which comprises a pipe joint and guide pipes butted at two ends of the pipe joint, wherein a pipe sleeve is sleeved on the outer wall of each guide pipe, an outer sleeve nut is sleeved outside each pipe sleeve, one end of each outer sleeve nut is clamped with the pipe sleeve, the other end of each outer sleeve nut is in threaded connection with the outer wall of each pipe joint, a plurality of annular clamping grooves distributed along the axial direction of each pipe sleeve are formed in the inner wall of each pipe sleeve, a protruding portion is formed in the position, corresponding to each clamping groove, of each guide pipe in a rolling mode, an elastic split ring is arranged in each guide pipe, the outer wall of each split ring is matched with the inner side of the protruding portion in shape, and the inner diameter of each split ring is the same as the diameter of each guide pipe. According to the utility model, the split ring is arranged at the position, corresponding to the guide pipe protruding part, of the inner wall of the guide pipe, the variable-diameter cross section formed when the guide pipe rolls the protruding part is eliminated, so that the fluid in the guide pipe cannot generate turbulence when flowing through the inner side of the protruding part, the energy consumption and the vibration impact of a hydraulic system are reduced, and the heat productivity of the fluid is reduced.

Description

Non-flaring pipeline connecting piece

Technical Field

The utility model relates to the technical field of pipeline connection of aviation hydraulic systems, in particular to a flaring-free pipeline connecting piece.

Background

The pipeline system is a life line of the airplane, the hydraulic pipeline is one part with highest working pressure and strict reliability requirement in all pipelines of the airplane, the technical level of the pipeline system of the airplane is intensively embodied in the hydraulic pipeline system, and the pipeline connecting technology is particularly important for the current hydraulic system, so that the sealing performance of the pipeline connecting position is ensured, and the vibration generated when fluid in the pipeline passes through a pipeline connecting piece is reduced.

The prior patent publication No. CN207298152U discloses a flareless pipe connector, which is characterized in that a pipe sleeve is arranged between a conduit and a casing nut, an annular groove is formed on the inner wall of the pipe sleeve, and a shaft shoulder bulge is formed in the middle of the outer wall of the pipe sleeve. However, when the outer wall of the conduit is extruded and screwed into the annular groove on the pipe sleeve by the connecting piece through a rolling process, a plurality of concave annular grooves are formed on the inner wall of the conduit, and when fluid in the conduit passes through the concave annular grooves, turbulent flow is generated, so that the fluid is subjected to on-way pressure loss, and meanwhile, the heat is serious due to the action of vibration impact, and the energy consumption of a system is high.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

Aiming at the defects of the prior art, the utility model provides a flareless pipeline connecting piece which can eliminate the reducing cross section of the inner wall of a guide pipe, so that fluid is smoother when passing through the guide pipe, and the problem that the original fluid in the guide pipe is easy to generate turbulent flow to increase the energy consumption of a system is solved.

(II) technical scheme

In order to realize the purposes of eliminating the variable-diameter cross section of the inner wall of the conduit and ensuring that fluid passes through the conduit to be smoother, the utility model provides the following technical scheme: the pipe sleeve outer wall is sleeved with a pipe sleeve, an outer sleeve nut is sleeved outside the pipe sleeve, one end of the outer sleeve nut is connected with the pipe sleeve in a clamped mode, the other end of the outer sleeve nut is in threaded connection with the pipe joint outer wall, a plurality of annular clamping grooves distributed in the axial direction of the pipe sleeve are formed in the inner wall of the pipe sleeve, the pipe and the clamping grooves correspond to each other, a protruding portion is formed in the position, in the pipe, of the outer wall of the elastic split ring matched with the inner side appearance of the protruding portion in a matched mode, and the inner diameter of the split ring is the same as the diameter of the pipe.

Optionally, a first gasket is embedded in each of the clamping grooves, and the first gasket is matched with the profile of the clamping groove.

Optionally, the pipe joint further comprises a first sealing ring, the first sealing ring is arranged at the butt joint position of the conduit and the pipe joint, and the inner diameters of the first sealing ring, the conduit and the pipe joint are consistent.

Optionally, one end of the pipe sleeve facing the pipe joint is a tapered end portion with a tapered cross section, and a tapered notch matched with the tapered end portion of the pipe sleeve is formed in the end face of the pipe joint.

Optionally, a second gasket is embedded in the tapered notch, the outer wall of the second gasket is attached to the tapered notch, and the shape of the inner wall of the second gasket is matched with that of the tapered end of the pipe sleeve.

Optionally, the pipe joint further comprises a second sealing ring, and the second sealing ring is arranged at the intersection of the connecting surfaces of the pipe sleeve, the pipe joint and the outer sleeve nut.

(III) advantageous effects

Compared with the prior art, the utility model provides a flaring-free pipeline connecting piece, which has the following beneficial effects:

1. according to the utility model, the split ring is arranged at the position, corresponding to the guide pipe protruding part, of the inner wall of the guide pipe, the variable-diameter cross section formed when the guide pipe rolls the protruding part is eliminated, so that the fluid in the guide pipe cannot generate turbulence when flowing through the inner side of the protruding part, the energy consumption and the vibration impact of a hydraulic system are reduced, and the heat productivity of the fluid is reduced;

2. according to the utility model, the first gasket is arranged in the clamping groove of the accommodated guide pipe protruding part, so that the sealing property between the inner wall of the pipe sleeve and the outer wall of the guide pipe is increased, the fluid in the guide pipe is prevented from seeping out from the gap between the pipe sleeve and the guide pipe, and meanwhile, the connection tightness between the guide pipe and the pipe sleeve is improved;

3. according to the utility model, the pipe sleeve is provided with the tapered end part towards one end of the pipe joint, and the end surface of the pipe joint is provided with the tapered notch matched with the tapered end part, so that when the outer sleeve nut is screwed down, the tapered end part of the pipeline is extruded and embedded into the tapered notch of the pipe joint to form the tapered sealing surface, compared with plane contact, the sealing area is increased, and the sealing effect is improved.

Drawings

FIG. 1 is a schematic view of the overall half-section configuration of the present invention;

FIG. 2 is an enlarged view of the structure at A of FIG. 1 according to the present invention

Fig. 3 is a schematic view of the open ring structure of the present invention.

In the figure: 1. a conduit; 2. a nut is sleeved; 3. a pipe joint; 4. pipe sleeve; 5. a card slot; 6. a boss portion; 7. a first gasket; 8. a tapered slot opening; 9. a second gasket; 10. a first seal ring; 11. a second seal ring; 12. an open ring.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example (b): referring to fig. 1 to fig. 3, an embodiment of the present invention provides a technical solution: a flareless pipeline connector comprises a pipe joint 3 and guide pipes 1 butted at two ends of the pipe joint 3, wherein a pipe sleeve 4 is sleeved on the outer wall of the guide pipe 1, an outer sleeve nut 2 is sleeved on the outer part of the pipe sleeve 4, one end of the outer sleeve nut 2 is clamped with the pipe sleeve 4, the other end of the outer sleeve nut is in threaded connection with the outer wall of the pipe joint 3, a plurality of annular clamping grooves 5 distributed along the axial direction of the pipe sleeve 4 are formed on the inner wall of the pipe sleeve 4, a protruding part 6 is formed on the position, corresponding to the clamping grooves 5, of the guide pipe 1 in a rolling and forming mode, an elastic split ring 12 is arranged in the guide pipe 1, the outer wall of the elastic split ring is matched with the inner side of the protruding part 6 in shape, the inner diameter of the split ring 12 is the same as the diameter of the guide pipe 1, when the pipe 1 is assembled, the inner part, embedded in the pipe sleeve 4, is embedded into the clamping grooves 5 of the pipe sleeve 4 through the deformation of the rolling and then the split ring 12 is installed on the inner side of the protruding part 6, so that the sunken part of the inner wall of the guide pipe 1 can be smooth, and further, fluid in the guide pipe 1 can not generate turbulence when flowing through the protruding part 6, the energy consumption and the vibration impact of the hydraulic system are reduced, and the heat productivity of the fluid is reduced.

On the basis of the above embodiments, each of the locking grooves 5 of the present embodiment is embedded with a first gasket 7, the first gasket 7 is adapted to the contour of the locking groove 5, and the first gasket 7 increases the sealing performance between the inner wall of the pipe sleeve 4 and the outer wall of the catheter 1, thereby preventing the fluid in the catheter 1 from leaking out from the gap between the pipe sleeve 4 and the catheter 1.

On the basis of the above embodiment, the present embodiment further includes a first sealing ring 10, the first sealing ring 10 is disposed at the butt joint position of the conduit 1 and the pipe joint 3, and the inner diameters of the first sealing ring 10, the conduit 1 and the pipe joint 3 are the same, the first sealing ring 10 forms a first seal between the conduit 1 and the pipe joint 3, and the possibility of pipeline leakage is reduced.

On the basis of the above embodiments, the end of the pipe sleeve 4 facing the pipe joint 3 in the present embodiment is a tapered end portion with a tapered cross section, the end face of the pipe joint 3 is provided with a tapered notch 8 adapted to the tapered end portion of the pipe sleeve 4, and when the outer nut 2 is tightened, the tapered end portion of the pipe is pressed and embedded in the tapered notch 8 of the pipe joint 3 to form a tapered sealing surface.

On the basis of the above embodiments, the second gasket 9 is embedded in the tapered notch 8 of the present embodiment, the outer wall of the second gasket 9 is fitted to the tapered notch 8, the shape of the inner wall of the second gasket 9 is matched with the tapered end of the pipe sleeve 4, and the arrangement of the second gasket 9 further increases the sealing performance of the contact surface between the pipe sleeve 4 and the pipe joint 3.

On the basis of the above embodiment, the present embodiment further includes a second sealing ring 11, the second sealing ring 11 is disposed at the intersection of the connection surfaces of the pipe sleeve 4, the pipe joint 3 and the outer nut 2, and when the first sealing ring 10 and the second gasket 9 are damaged at the same time, the second sealing ring 11 can prevent fluid from leaking out through the gap between the pipe sleeve 4 and the outer nut 2 or between the outer nut 2 and the pipe joint 3.

The working principle is as follows: when the pipeline is connected, firstly, a first gasket 7 is arranged in a clamping groove 5 on the inner wall of a pipe sleeve 4 of which the outer sleeve nut 2 is sleeved outside, then the end part of a guide pipe 1 is inserted into the pipe sleeve 4 to completely cover a plurality of clamping grooves 5, a convex part 6 is formed on the inner wall of the guide pipe 1 by rolling by utilizing a rolling process, the convex part 6 is embedded into the clamping groove 5 on the inner side of the pipe sleeve 4, then the pipe sleeve 4 provided with the guide pipe 1 is connected with the end part of a pipe joint 3 by the outer sleeve nut 2, before the connection, a second gasket 9 is arranged in a conical notch 8, a first sealing ring 10 is arranged at the end part of the guide pipe 1, a second sealing ring 11 is arranged at the end part of the contact surface of the pipe sleeve 4 and the outer sleeve nut 2, when the connection, the outer sleeve nut 2 is in threaded connection with the end part of the pipe joint 3, in the connection process, the conical end part of the pipe sleeve 4 is embedded into the conical notch 8 of the pipe joint 3, and a plurality of seals are formed among the pipe joint 1, the pipe sleeve 4 and the pipe joint 3, the phenomenon of revealing after the pipeline connection is reduced.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a no flaring pipeline connecting piece which characterized in that: including coupling (3) and dock in pipe (1) at coupling (3) both ends, pipe (1) outer wall cover is equipped with pipe box (4), the outside cover of pipe box (4) is equipped with outer nut (2), outer nut (2) one end with pipe box (4) joint, the other end with coupling (3) outer wall threaded connection, pipe box (4) inner wall shaping has along a plurality of ring groove (5) of pipe box (4) axial distribution, pipe (1) with draw-in groove (5) correspond the position roll forming and have bellying (6), be equipped with in pipe (1) outer wall with elasticity split ring (12) of the inboard appearance adaptation of bellying (6), split ring (12) internal diameter with pipe (1) diameter is the same.

2. The flareless tubing connector of claim 1, wherein: each clamping groove (5) is internally provided with a first gasket (7) in an embedded mode, and the first gaskets (7) are matched with the profile of the clamping grooves (5).

3. The flareless tubing connector of claim 1, wherein: still include first sealing washer (10), first sealing washer (10) set up in pipe (1) with the butt joint position of coupling (3), just first sealing washer (10) pipe (1) with the internal diameter of coupling (3) is unanimous.

4. The flareless tubing connector of claim 1, wherein: one end of the pipe sleeve (4) facing the pipe joint (3) is a conical end part with a conical cross section, and a conical notch (8) matched with the conical end part of the pipe sleeve (4) is formed in the end face of the pipe joint (3).

5. The flareless tubing connector of claim 4, wherein: a second gasket (9) is embedded into the conical notch (8), the outer wall of the second gasket (9) is attached to the conical notch (8), and the shape of the inner wall of the second gasket is matched with that of the conical end of the pipe sleeve (4).

6. The flareless tubing connector of claim 1, wherein: the pipe joint is characterized by further comprising a second sealing ring (11), wherein the second sealing ring (11) is arranged at the intersection of the connecting surfaces of the pipe sleeve (4), the pipe joint (3) and the outer sleeve nut (2).