阅读说明：本技术 一种导管连接快卸卡箍的去应力安装方法 (Destressing installation method of pipe connection quick-release clamp ) 是由 苏裕 赵爽忻 蒋智华 于 2020-05-22 设计创作，主要内容包括：本申请涉及飞机装配技术领域,公开了一种导管连接快卸卡箍去应力安装方法,通过装前检查、首次去应力安装、二次去应力安装以及终检安装等步骤,解决了目前导管快卸卡箍在安装过程中因安装应力过大而导致的系统管路在使用时产生裂纹或漏渗油的问题。(The application relates to the technical field of aircraft assembly and discloses a destressing installation method for a conduit connection quick release clamp, which solves the problem that a system pipeline generates cracks or leaks oil when in use due to overlarge installation stress in the installation process of the conventional conduit quick release clamp through the steps of inspection before installation, primary destressing installation, secondary destressing installation, final inspection installation and the like.)

1. A destressing installation method of a conduit connection quick release clamp is characterized by comprising the following steps: the method specifically comprises the following steps:

s1, inspection before installation

S1.1, checking a hoop component: each part is free from damage, chipping and burr and is clean, the clamping band is not twisted or twisted, the welding point is not damaged or cracked, and the bushing and the bolt can flexibly rotate;

s1.2, joint inspection: the sealing surface of the joint is clean and has no scratch, dirt, oil or grease, the joint is welded on a guide pipe or a designated component, and the welding seam has no defects of cracks and the like which influence the use;

s1.3, rubber ring inspection: the surface of the rubber ring has no deformation such as scratch, bending or dent;

s1.4, joint involution inspection: checking whether the catheter joint and the catheter joint with the rubber ring hole are closed and attached tightly, and ensuring that one end of the outer edge of the joint is attached tightly and the gap of the other end is not more than 0.38 mm;

s2, initial stress relief installation

Clamping the hoop component on the closed joint, tightening the nut by using a fixed-force wrench according to 70% of a recommended tightening torque value, checking and confirming that the hoop component is uniformly clamped on the joint along the circumferential direction, tapping the clamping belt by using a mallet, so that the circumferential tension distribution of the clamping belt is more uniform, performing preliminary stress release, and not tapping a welding point during tapping;

s3, secondary destressing installation

On the basis of the step S2, continuously screwing the nut to the recommended screwing torque value, tapping the clamping belt again by using a hammer to ensure that the circumferential tension distribution of the clamping belt is more uniform, simulating the final installation state and releasing stress, wherein the welding point cannot be tapped during tapping;

s4, final inspection installation

And loosening the nut to release the clamp assembly, further releasing the stress at the V-shaped surface where the clamping band is contacted with the joint, and then tightening the nut once to a recommended torque value, so that the installation of the clamp is finished.

2. The method of destressing a conduit coupling quick release clip, according to claim 1, wherein: in the steps S2 and S3, the metal hammer is used to strike the strap.

3. The method of destressing a conduit coupling quick release clip, according to claim 1, wherein: in the steps S2 and S3, the cartridge is tapped from the opposite side of the locking device along the outer circumference of the cartridge.

Technical Field

The application relates to the technical field of aircraft assembly, in particular to a destressing installation method of a conduit connection quick-release clamp.

Background

When an aircraft system pipeline is designed, requirements such as maintainability and operability are considered, and a standard component such as a conduit quick release clamp is often adopted to connect adjacent conduits, so that the installation quality of the conduit quick release clamp plays an important role in the performance and reliability of the aircraft system. The quick-release pipe clamp is characterized in that the clamp locks and clamps the joints, the radial clamping force part is converted into axial tension along the pipe through the V-shaped surfaces contacted with the joints, the joints at two ends are close to each other under the action of the tension and compress the sealing rings in the sealing grooves, and the sealing connection of pipelines is realized.

At present, the quick-release pipe clamp commonly used for airplane system pipelines has three specifications of GJB3821A, HB6521 and HB6535, the quick-release pipe clamp has the advantages of simple structure, quick disassembly and good sealing performance, but also has the defects of rigid connection, overlarge weight and the like, and meanwhile, the sealing of the quick-release pipe clamp plays a sealing role through the end surface deformation of a clamping belt in the quick-release pipe clamp and the elastic deformation generated by the compression of a sealing ring, so that the quick-release pipe clamp has stress in the sealing principle, and the quick-release pipe clamp is very easy to generate the condition of overlarge mounting stress in the mounting process, thereby further causing the problems of cracks, leakage oil and the like.

Disclosure of Invention

In order to overcome the problems and the defects in the prior art, the application provides the destressing installation method of the conduit connection quick release clamp, and the problem that the installation stress of the existing conduit quick release clamp is overlarge in the installation process is solved through the steps of inspection before installation, primary destressing installation, secondary destressing installation, final inspection installation and the like.

In order to achieve the above purpose, the technical solution of the present application is as follows:

a stress-relief mounting method of a conduit connection quick release clamp comprises the following steps:

s1, inspection before installation

S1.1, checking a hoop component: each part is free from damage, chipping and burr and is clean, the clamping band is not twisted or twisted, the welding point is not damaged or cracked, and the bushing and the bolt can flexibly rotate;

s1.2, joint inspection: the sealing surface of the joint is clean and has no scratch, dirt, oil or grease, the joint is welded on a guide pipe or a designated component, and the welding seam has no defects of cracks and the like which influence the use;

s1.3, rubber ring inspection: the surface of the rubber ring has no deformation such as scratch, bending or dent;

s1.4, joint involution inspection: checking whether the catheter joint and the catheter joint with the rubber ring hole are closed and attached tightly, and ensuring that one end of the outer edge of the joint is attached tightly and the gap of the other end is not more than 0.38 mm;

s2, initial stress relief installation

Clamping the hoop component on the closed joint, tightening the nut by using a fixed-force wrench according to 70% of a recommended tightening torque value, checking and confirming that the hoop component is uniformly clamped on the joint along the circumferential direction, tapping the clamping belt by using a mallet, so that the circumferential tension distribution of the clamping belt is more uniform, performing preliminary stress release, and not tapping a welding point during tapping;

s3, secondary destressing installation

On the basis of the step S2, continuously screwing the nut to the recommended screwing torque value, tapping the clamping belt again by using a hammer to ensure that the circumferential tension distribution of the clamping belt is more uniform, simulating the final installation state and releasing stress, wherein the welding point cannot be tapped during tapping;

s4, final inspection installation

And loosening the nut to release the clamp assembly, further releasing the stress at the V-shaped surface where the clamping band is contacted with the joint, and then tightening the nut once to a recommended torque value, so that the installation of the clamp is finished.

Preferably, in the steps S2 and S3, the cassette is struck with a non-metallic hammer.

Preferably, in the steps S2 and S3, the cartridge is tapped from the opposite side of the opposite locking device along the outer circumference of the cartridge.

The beneficial effect of this application:

(1) this application has solved the too big problem of present pipe quick-release clamp installation stress in the installation through inspection before the dress, first destressing installation, secondary destressing installation and examine step such as installation finally. Specifically, in the clamp installation, the mode of adopting repetitious knock and installation carries out the release of adaptive capacity, has avoided producing the problem of crackle or leak the oil impregnate when using because of the system pipeline that the installation stress is too big leads to, simultaneously, also can avoid the cassette to shorten because of the life-span that stress concentration leads to influence the problem of follow-up result of use.

(2) In this application, when strikeing the cassette, adopt nonmetal mallet to strike, the mallet that rubber material or wood material preparation formed for example, nonmetal mallet has certain guard action in metal mallet to the cassette relatively, can guarantee the surface quality in cassette, prevents to be produced unnecessary by fish tail and cassette and warp.

Drawings

FIG. 1 is a schematic illustration of a destressing installation process for a conduit coupling quick release clip;

FIG. 2 is a schematic illustration of the clip assembly peen destressing.

Detailed Description

The present application will be described in further detail with reference to examples, but the embodiments of the present application are not limited thereto.

The embodiment discloses a destressing installation method of a conduit connection quick release clamp, which comprises 4 main steps of inspection before installation, primary destressing installation, secondary destressing installation and final inspection installation, and specifically comprises the following operations:

s1, inspection before installation

S1.1, checking a hoop component: each part is free from damage, chipping and burr and is clean, the clamping band is not twisted or twisted, the welding point is not damaged or cracked, and the bushing and the bolt can flexibly rotate;

s1.2, joint inspection: the sealing surface of the joint is clean and has no scratch, dirt, oil or grease, the joint is welded on a guide pipe or a designated component, and the welding seam has no defects of cracks and the like which influence the use;

s1.3, rubber ring inspection: the surface of the rubber ring has no deformation such as scratch, bending or dent;

s1.4, joint involution inspection: because the joint mutual involution at the two ends of the conduit is crucial to realizing the best working performance of the clamp component, whether the conduit joint and the conduit joint with the rubber ring hole are involuted and adhered or not is checked before the clamp component is installed, and one end of the outer edge of the joint is ensured to be adhered, and the gap between the other end of the outer edge of the joint is not more than 0.38 mm;

s2, initial stress relief installation

Clamping the hoop component on the closed joint, tightening the nut by using a fixed-force wrench according to 70% of a recommended tightening torque value, checking and confirming that the hoop component is uniformly clamped on the joint along the circumferential direction, tapping the clamping belt by using a mallet, so that the circumferential tension distribution of the clamping belt is more uniform, primary stress release is carried out, and a welding point cannot be tapped during tapping;

s3, secondary destressing installation

On the basis of the step S2, after the nut is continuously screwed to the recommended screwing torque value, the clamping belt is tapped again by the hammer so that the circumferential tension distribution of the clamping belt is more uniform, the final installation state is simulated and the stress is released, and similarly, the welding point cannot be tapped during tapping;

s4, final inspection installation

And loosening the nut to release the clamp assembly, further releasing the stress at the V-shaped surface where the clamping band is contacted with the joint, and then tightening the nut once to a recommended torque value, so that the installation of the clamp is finished.

Preferably, in the steps S2 and S3, a non-metal mallet is used to strike the strap, such as a rubber mallet or a wood mallet. If adopt the wooden stick of metal material, when knocking, the dynamics of knocking is not easy to be controlled, consequently, causes the deformation to the cassette easily, and metal wooden stick still can cause the damage to the surface quality of cassette simultaneously, when knocking, the surface of fish tail cassette easily.

Preferably, in the steps S2 and S3, when the cartridge is tapped, the cartridge is tapped from the opposite side to the locking device along the outer circumference of the cartridge.

In the description of the present application, it is to be understood that the terms "center", "longitudinal", "lateral", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience in describing the present application and for simplifying the description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and therefore should not be construed as limiting the scope of the present application.

The foregoing is directed to embodiments of the present invention, which are not limited thereto, and any simple modifications and equivalents thereof according to the technical spirit of the present invention may be made within the scope of the present invention.