Pipe joint radial crimping tool

Abstract

According to the radial crimping tool provided by the utility model, an external extrusion pipe joint which can be matched for use is placed in the crimping tool, a guide pipe to be connected is inserted into the joint, and when a downward moving sliding block of the crimping tool moves in the radial direction under the pushing of an external hydraulic piston, a spring lock catch is shrunk, and the lock catch is slowly contacted with the joint; the gap between the connector and the guide pipe is gradually eliminated, interference fit is gradually formed, reliable permanent connection is formed through elastic-plastic deformation of the guide pipe and the connector, and the sealing performance is improved. The crimping tool can be used for repairing the fracture of the bent section of the pipeline, is simple to mount and maintain and has a structural error compensation capability.

Description

Technical Field

[0001] The utility model relates to the technical field of pipeline connection, and more specifically to a radial crimping tool for a pipe joint. Background Art

[0002] At present, my country is gradually using higher pressure hydraulic systems on aircraft. With the increase of working pressure, more stringent requirements are also put forward for sealing. Aviation hydraulic pipeline connectors bear the important functions of connecting pipelines, transmitting media and delivering power. If the pipeline connectors are damaged, oil leakage will occur, causing the entire hydraulic system to fail, and in severe cases, it will cause aircraft grade accidents. Therefore, improving the sealing performance of pipeline connectors is an important guarantee for the medium transmission of aircraft hydraulic systems under various climatic conditions and flight conditions. Utility Model Content

[0003] The utility model aims to provide a radial crimping tool for a pipe joint, which is used in conjunction with an external extrusion pipe joint and causes the joint and the conduit to produce plastic deformation under radial load to achieve permanent connection and thus seal.

[0004] The technical solution of the utility model is to provide a radial crimping tool, wherein an external extruded pipe joint that can be used in conjunction with the crimping tool is placed in the crimping tool, and a catheter is inserted into the external extruded pipe joint. When the crimping tool moves in a radial direction under the push of an external hydraulic piston, a spring lock buckle will shrink, and the lock buckle will slowly contact the joint, and the gap between the joint and the catheter will gradually be eliminated and an interference fit will gradually be formed, thereby forming a reliable connection by relying on the elastic-plastic deformation of the catheter and the joint.

[0005] Beneficial effects of the utility model:

[0006] (1) The main structural components of the crimping tool are all movable components, which are convenient for installation and unloading.

[0007] (2) The radial extrusion joint can achieve permanent connection between the catheter and the joint under the radial extrusion action of the crimping tool, through the deformation and rebound force of the catheter and the joint, with high strength and good sealing.

[0008] (3) The crimping tool is suitable for repairing ruptures in pipe bends. It is easy to install and maintain and has the ability to compensate for structural errors. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] The accompanying drawings herein are incorporated into and constitute a part of the specification, illustrate embodiments consistent with the present invention, and together with the specification are used to explain the principles of the present invention. Obviously, the accompanying drawings described below are only some embodiments of the present invention, and for those of ordinary skill in the art, other accompanying drawings can be obtained based on these accompanying drawings without creative work.

[0010] Figure 1 A schematic diagram of a radial crimping tool for a pipe joint provided by the utility model and an external extrusion pipe joint;

[0011] Figure 2 An exploded view of the radial crimping tool for a pipe joint provided by the utility model;

[0012] Figure 3 The utility model is a bottom view of the lower shell of the radial crimping tool for pipe joints.

[0013] In the attached figure:

[0014] 1-crimping tool; 101-upper housing; 102-lower housing; 103-upper moving slider; 104-lower moving slider; 105-fastening screw 1; 106-spring; 107-slotted pin; 108-spring lock; 109-front baffle; 110-rear baffle; 111-hexagon socket bolt; 112-nut; 113-fastening screw 2; 114-slot; 115-through hole; 116-bottom hole;

[0015] 2-External extrusion pipe joint; DETAILED DESCRIPTION

[0016] The exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, the exemplary embodiments can be implemented in many forms and should not be construed as being limited to the examples set forth herein; rather, these embodiments are provided so that the present invention will be more comprehensive and complete and fully convey the concept of the exemplary embodiments to those skilled in the art.

[0017] See also Figure 1 and Figure 2, the figure shows a schematic diagram of the structure of the radial crimping tool for pipe joints provided by the utility model, and the crimping tool 1 includes an upper shell 101, an upper movable slider 103, a lower movable slider 104 and a lower shell 102 from top to bottom. The upper shell 101 and the lower shell 102 are used to accommodate the upper and lower movable sliders 103 and 104 respectively, and the side is slotted 114. The upper movable slider 103 and the lower movable slider 104 are located inside the upper shell 101 and the lower shell 102. The parts are provided with through holes 115. The upper movable slider 103 and the lower movable slider 104 are embedded and assembled with the upper shell 101 and the lower shell 102 by inserting a set screw 105 and a spring 106 into the through hole, and the pin 107 passing through the slot 114. The upper movable slider 103 and the lower movable slider 104 can move up and down in the upper shell 101 and the lower shell 102 and are limited by the slot 114 and the pin 107. The spring lock 108 is installed at the top of the upper moving slider 103 and the lower moving slider 104. The front baffle 109 and the rear baffle 110 are installed on the axial side of the upper moving slider 103 and the lower moving slider 104 through the set screw 113, which plays an axial limit role for the spring lock 108. After the upper shell 101 and the lower shell 102 are connected by the hexagon socket bolt 111 and the nut 112, a circular hole is formed on the opposite surface of the upper moving slider 103 and the lower moving slider 104, and the spring lock 108 and the external extruded pipe joint 2 form a circumferential surround. The bottom of the lower shell 102 has a hole 116 (see Figure 3 ), an external hydraulic piston (not shown) can directly contact the bottom of the lower moving slider 104 through the hole and push the lower moving slider 104 to move upward.

[0018] When the crimping tool is used, the conduit connector (not shown) is inserted into the external extrusion pipe connector 2 used in conjunction with the conduit connector and placed between the spring locks 108. The external hydraulic piston (not shown) directly acts on the lower movable slider 104 through the bottom hole 116 of the lower housing 102. The radial reciprocating motion of the external hydraulic piston drives the lower movable slider to move. The upper and lower spring locks 108 shrink and deform under the radial crimping action of the lower movable slider 104. The spring locks 108 slowly contact the external extrusion pipe connector 2. The gap between the external extrusion pipe connector 2 and the conduit connector (not shown) is gradually eliminated and an interference fit is gradually formed. A reliable sealing connection is formed by elastic-plastic deformation. When the lower movable slider 104 reaches the limit, the extrusion action is completed, the hydraulic piston withdraws from pushing the lower slider 104, and the lower slider 104 moves downward naturally. The tube with the sealed connection can be taken out.

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

Claims

1. A radial crimping tool for a pipe joint, characterized in that: The crimping tool (1) comprises, from top to bottom, an upper shell (101), an upper movable slider (103), a lower movable slider (104) and a lower shell (102); the interior of the upper shell (101) and the lower shell (102) are respectively used to accommodate the upper movable slider (103) and the lower movable slider (104), and the side surfaces are provided with grooves (114); the upper movable slider (103) and the lower movable slider (104) are respectively provided with through holes (115) in the interior of the upper shell (101) and the lower shell (102); the upper movable slider (103) and the lower movable slider (104) are respectively connected to the shells (101) and (102) by means of a set screw (105) inserted into the through hole, a spring (106) and a slotted pin (107) passing through the groove (114). ) are embedded and assembled, the upper movable slider (103) and the lower movable slider (104) can move up and down in the upper shell (101) and the lower shell (102) and be limited by the groove (114) and the slotted pin (107); the spring lock (108) is installed on the top of the upper movable slider (103) and the lower movable slider (104); the upper shell (101) and the lower shell (102) are connected by the hexagon socket bolt (111) and the nut (112), the upper movable slider (103) and the lower movable slider (104) are formed with a circular hole on the opposite surface, and the spring lock (108) can form a circumferential surrounding for the connecting pipe; the bottom of the lower shell (102) has a hole (116), and the bottom of the lower movable slider (104) is in direct contact with the external hydraulic piston through the hole (116).

2. The radial crimping tool for pipe joints according to claim 1, characterized in that: The front baffle plate (109) and the rear baffle plate (110) are mounted on the axial side surfaces of the upper movable slider (103) and the lower movable slider (104) by means of two set screws (113), and play an axial limiting role on the spring lock buckle (108).

3. The radial crimping tool for a pipe joint according to claim 1, characterized in that: The crimping tool (1) is used in conjunction with an external extrusion pipe joint (2).

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