Non-metal pipeline flexible joint

Abstract

The utility model discloses a non-metal pipeline flexible joint which is composed of pipe sleeves, a sleeve, sealing rings and a hoop, the outer side of one end of each pipe sleeve is provided with a sealing ring groove, the two pipe sleeves are symmetrically arranged, the sealing rings are respectively arranged in the sealing ring grooves, the sleeve is arranged on the outer sides of the two symmetrical sealing rings to form a sealing pair, and the hoop is arranged on the sleeve. The clamping hoop is of a clamshell type structure, the clamping hoop is composed of clamping rings, a first pin shaft, a second pin shaft and a lock catch structure, the two clamping rings are oppositely arranged, one ends of the clamping rings are connected through the first pin shaft in a hinged mode, the other ends of the clamping rings are matched with the lock catch structure in a buckled and locked mode, and the pipe sleeve, the clamping rings and the sleeve are all made of PEEK composite materials. According to the flexible joint, flexible connection and installation of the guide pipe can be achieved, and compensation amount is provided in the axial direction and the angle direction. The method is suitable for manufacturing guide pipe parts of special-shaped complex structures, surface treatment is not needed, meanwhile, the weight of an aircraft pipeline system is greatly reduced, and good stability and reliability are achieved.

Description

Technical Field

[0001] This utility model patent belongs to the field of pipeline connectors, and specifically discloses a non-metallic pipeline flexible joint. Background Art

[0002] At present, the pipes and flexible joints used in professional pipeline systems such as aircraft fuel and environmental control in China are mainly made of metal materials (aluminum alloy and stainless steel). Metal materials have high density and heavy weight, which is not conducive to the overall weight reduction of the aircraft. In addition, metal pipes and flexible joints have high requirements for corrosion protection and need to undergo corresponding surface treatment (passivation or anodizing). In addition, the processing and forming technology of metal pipes is demanding, especially for heterogeneous and complex structures, which consumes more manpower and material resources. Subsequent models have higher requirements for the aircraft's maneuverability, high reliability, long life, and economy, so the demand for material optimization and iteration of the piping system is also imminent. Utility Model Content

[0003] The purpose of the utility model is to provide a non-metallic pipeline and a flexible joint, which can reduce the weight of an aircraft piping system, improve environmental adaptability, and enhance processing and manufacturing processability.

[0004] The technical solution of the utility model is: a non-metallic pipeline flexible joint, which consists of a pipe sleeve, a sleeve, a sealing ring, and a clamp. A sealing ring groove is provided on the outside of one end of the pipe sleeve, and two pipe sleeves are symmetrically provided. Sealing rings are respectively provided in the sealing ring grooves. The sleeve is installed on the outside of the two symmetrical sealing rings to form a sealing pair. The clamp is a clamshell structure, and the clamp consists of a clamp, a pin shaft 1, a pin shaft 2, and a locking structure. Two clamp rings are relatively arranged, and one end of the clamp ring is connected by a pin shaft 1 hinge, and the pin shaft 2 at the other end cooperates with the locking structure to be locked. The pipe sleeve, clamp ring and sleeve are all made of PEEK composite material.

[0005] Furthermore, the pipe sleeve, the clamping ring and the sleeve are made of PEEK rods by machining or mold injection.

[0006] Furthermore, the sleeve and the catheter are connected by infrared welding or ultrasonic welding. The material matrix melts under heat, and the two are compatible and reliable. The flexible joint can realize flexible connection and installation of the catheter, providing compensation in axial direction and angle.

[0007] Beneficial effects of the utility model:

[0008] (1) The density of PEEK material used in pipe sleeves, clamps, sleeves and conduits is about 1 / 2 of that of aluminum alloy and about 1 / 6 of that of stainless steel. It has high specific strength and can greatly reduce the weight index of aircraft piping systems while meeting the requirements of high strength.

[0009] (2) The pipe sleeve, clamp ring, sleeve and catheter are made of PEEK material and do not require surface treatment, which reduces the manufacturing process compared to stainless steel passivation and aluminum alloy anodizing.

[0010] (3) PEEK material has excellent corrosion resistance and can maintain excellent physical and chemical properties in many extreme environments. It has higher stability and reliability than aluminum alloy and stainless steel materials, and can enhance the weather resistance of aircraft piping systems.

[0011] (4) The layout of the aircraft piping system is very limited, and the direction and structure of the catheter are varied. The joints are made of PEEK material with strong plasticity, which is very suitable for manufacturing catheter parts with complex heterogeneous structures. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The accompanying drawings are incorporated into and constitute a part of the specification, illustrating embodiments of the present invention and, together with the specification, explaining the principles of the present invention. Obviously, the drawings described below are only some embodiments of the present invention, and those skilled in the art can derive other drawings based on these drawings without inventive effort. In the drawings:

[0013] Figure 1 This is a structural diagram of the non-metallic pipe flexible joint provided by the utility model;

[0014] In the attached figure: 1.1-pipe sleeve, 1.11-seal ring groove

[0015] 1.2-sleeve, 1.3-sealing ring

[0016] 1.4-Clamp, 1.41-Clamp, 1.42-Pin 1, 1.43-Pin 2, 1.44-Lock structure DETAILED DESCRIPTION

[0017] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be more thorough and complete and will fully convey the concepts of the example embodiments to those skilled in the art.

[0018] See also Figure 1The figure shows a schematic diagram of the non-metallic pipeline flexible joint structure provided by the utility model, which consists of a pipe sleeve 1.1, a sleeve 1.2, a sealing ring 1.3, and a clamp 1.4. A sealing ring groove 1.11 is provided on the outside of one end of the pipe sleeve 1.1, and the pipe sleeve 1.1 is symmetrically provided with two sealing rings 1.3. The sleeve 1.2 is installed on the outside of the two symmetrical sealing rings 1.3 to form a sealing pair. The clamp 1.4 is a clamshell structure. The clamp 1.4 consists of a clamp 1.41, a pin 1.42, a pin 2 1.43, and a locking structure 1.44. Two clamps 1.41 are relatively arranged, and one end of the clamp 1.41 is hinged by a pin 1.42, and the other end pin 2 1.43 cooperates with the locking structure 1.44 to be locked. The pipe sleeve 1.1 and the clamp 1.41 are both made of PEEK composite material. The sleeve 1.1, collar 1.41, and sleeve 1.2 are machined or injection-molded from PEEK rods. The sleeve 1.1 and conduit 2 are connected using infrared or ultrasonic welding. Conduit 2 is made from PEEK tubing, and the heat-melting matrix allows the two to fuse securely and reliably. The flexible joint allows for flexible connection and installation of the conduit, providing axial and angular compensation. This design is suitable for manufacturing conduit components with complex, heterogeneous structures without the need for surface treatment, significantly reducing the weight of aircraft piping systems while also offering excellent stability and reliability.

[0019] The above embodiments are only used to illustrate the technical solution of the present invention and are not intended to limit the scope of the present invention. Any modification or equivalent substitution of the technical solution of the present invention made by ordinary technicians in this field shall be included in the scope of the claims of the present invention as long as it does not depart from the spirit and scope of the technical solution of the present invention.

Claims

1. A non-metallic pipeline flexible joint, characterized by: The invention comprises a pipe sleeve (1.1), a sleeve (1.2), a sealing ring (1.3), and a clamp (1.4); a sealing ring groove (1.11) is provided on the outside of one end of the pipe sleeve (1.1); the pipe sleeve (1.1) is symmetrically provided with two sealing rings (1.3), and sealing rings (1.3) are respectively provided in the sealing ring grooves (1.11); the sleeve (1.2) is installed on the outside of the two symmetrical sealing rings (1.3) to form a sealing pair; the clamp (1.4) is a clamshell structure; the clamp ( 1.4) consists of a clamping ring (1.41), a first pin (1.42), a second pin (1.43), and a locking structure (1.44); two clamping rings (1.41) are arranged opposite to each other; one end of the clamping ring (1.41) is hingedly connected to the first pin (1.42); the other end of the second pin (1.43) is locked in conjunction with the locking structure (1.44); the pipe sleeve (1.1), the clamping ring (1.41), and the sleeve (1.2) are all made of PEEK composite material.

2. The non-metallic pipe flexible joint according to claim 1, characterized in that: The pipe sleeve (1.1) and the clamping ring (1.41) are made by machining PEEK rods or by injection molding.

3. The non-metallic pipe flexible joint according to claim 1, characterized in that: The pipe sleeve (1.1) and the catheter (2) are connected by infrared welding, and the catheter (2) is made of PEEK pipe material.

4. The non-metallic pipeline flexible joint according to claim 1, characterized in that: The sleeve (1.1) and the catheter (2) are connected by ultrasonic welding, and the catheter (2) is made of PEEK tubing.

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