A double-layer tube medium filling device

Abstract

The utility model discloses a double -layer pipe medium filling device, including filling frock, outer pipe fastening screw, sealing ring, inner tube fastening screw, wherein filling frock includes: quick -plug structure connector, inner tube stop end face, inner tube sealing ring groove, inner tube positioning hole, inner tube fastening screw hole, outer tube stop end face, outer tube sealing ring groove, outer tube positioning hole and outer tube fastening screw hole. For double -layer pipe, realize the sealing in the filling process to guarantee the filling effect, and satisfy quick installation and dismounting requirement.

Description

Technical Field

[0001] This utility model relates to the field of aviation pipeline connection technology, and in particular to a medium filling device for double-layer pipes. Background Technology

[0002] Currently, double-layer pipes are typically used in the common piping of aircraft engines in China to meet multiple airworthiness requirements and improve aircraft reliability and safety. However, the manufacturing process of double-layer pipes requires filling with a medium to ensure that various indicators (such as ellipticity) meet bending specifications during bending. Therefore, specialized tooling is needed during the medium filling process to achieve a seal, ensuring filling effectiveness and meeting the requirements for rapid installation and disassembly. Utility Model Content

[0003] The purpose of this invention is to provide a double-layer tube medium filling device that achieves sealing during the filling process to ensure the filling effect and meet the requirements for quick installation and disassembly.

[0004] A double-tube media device includes a filling fixture, an outer tube fastening screw, a sealing ring, and an inner tube fastening screw; wherein the filling fixture includes: a quick-connect structure connector, an inner tube stop end face, an inner tube sealing ring groove, an inner tube positioning hole, an inner tube set thread hole, an outer tube stop end face, an outer tube sealing ring groove, an outer tube positioning hole, and an outer tube set thread hole. The filling fixture is a cylinder with a multi-stage stepped inner bore. The inner diameter of the stepped inner bore decreases from top to bottom. From top to bottom, the first stage bore is the outer tube positioning hole, the third stage bore is the inner tube positioning hole, the upper end face of the second stage bore is the outer tube stop end face, and the upper end face of the fourth stage bore is the inner tube stop end face. The end face of the outer tube positioning hole has an outer tube sealing ring groove in the direction away from the axial direction, and an outer tube set thread hole that mates with the outer tube fastening screw is provided, avoiding the outer tube sealing ring groove. The end face of the inner tube positioning hole has an inner tube sealing ring groove in the direction away from the axial direction, and an inner tube set thread hole that mates with the inner tube fastening screw is provided, avoiding the inner tube sealing ring groove. A quick-connect structure connector is provided on the outside of the filling fixture. The quick-connect structure connector has a through hole that communicates with the second stage bore of the inner bore of the filling fixture. There are two sealing rings, which are respectively placed in the outer tube sealing ring groove and the inner tube sealing ring groove.

[0005] Furthermore, the outer tube set thread hole and the outer tube fastening screw are provided in three sets.

[0006] Furthermore, the inner tube set screw hole is provided with three sets to cooperate with the inner tube fastening screw.

[0007] The beneficial effects of this utility model are: for double-layer tubes, it achieves sealing during the filling process to ensure the filling effect and meets the requirements for quick installation and disassembly. Attached Figure Description

[0008] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments conforming to the present invention and, together with the description, serve to explain the principles of the present invention. Obviously, the drawings described below are merely some embodiments of the present invention, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort. In the drawings:

[0009] Figure 1 A schematic diagram of the assembly structure of the double-layer tube medium device provided by this utility model;

[0010] Figure 2 A schematic diagram of the filling device provided by this utility model;

[0011] Figure 3 In the perspective view of the filling device provided by this utility model: 1-filling fixture, 2-outer tube fastening screw, 3-sealing ring, 4-inner tube fastening screw, 5-outer tube, 6-inner tube

[0012] 101-Outer tube positioning hole, 102-Inner tube positioning hole, 103-Outer tube stop end face, 104-Inner tube stop end face, 105-Outer tube sealing ring groove, 106-Outer tube set thread hole, 107-Inner tube sealing ring groove, 108-Inner tube set thread hole, 109-Quick-connect structure connector. Detailed Implementation

[0013] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary 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 to make the present invention more comprehensive and complete, and to fully convey the concept of the exemplary embodiments to those skilled in the art.

[0014] Please see Figure 1-3The figure shows a schematic diagram of the structure of the double-layer tube medium device provided by this utility model, including a filling fixture 1, an outer tube fastening screw 2, a sealing ring 3, and an inner tube fastening screw 4; the filling fixture 1 is a cylinder with a multi-stage stepped inner hole, the inner diameter of the stepped inner hole decreasing from top to bottom, the first stage hole being an outer tube positioning hole 101, the third stage hole being an inner tube positioning hole 102, the upper end face of the second stage hole being an outer tube stop end face 103, and the upper end face of the fourth stage hole being an inner tube stop end face 104. The outer tube is positioned on the end face away from the axial direction of the outer tube positioning hole 101. A sealing ring groove 105 is provided, and an outer tube set threaded hole 106 is provided to mate with an outer tube fastening screw 2, avoiding the outer tube sealing ring groove 105. An inner tube sealing ring groove 107 is provided on the end face away from the axial direction of the inner tube positioning hole 102, and an inner tube set threaded hole 108 is provided to mate with an inner tube fastening screw 4, avoiding the inner tube sealing ring groove 107. A quick-connect structure connector 109 is provided on the outside of the filling fixture 1. The quick-connect structure connector 109 has a through hole communicating with the second stage hole. The quick-connect structure connector 109 is connected to the filling equipment interface, enabling quick assembly and disassembly after the double-layer tube and fixture are assembled in place. There are two sealing rings 3, located in the outer tube sealing ring groove 105 and the inner tube sealing ring groove 107 respectively. Three sets of outer tube set threaded holes 106 and three sets of inner tube set threaded holes 108 and inner tube fastening screws 4 are provided.

[0015] The inner tube stop end face 104 is used to position the axial position of the inner tube, and the inner tube positioning hole 102 is used to position the radial position of the inner tube. The outer surface of the inner tube is sealed with the tooling through the sealing ring 3 to prevent the filling medium from overflowing under a certain pressure. To further ensure that the inner tube does not move axially during the filling process, the double-layer tube medium filling tooling is designed with an inner tube set thread hole 108 in the circumferential direction, and the inner tube is fixed by the inner tube fastening screw 4.

[0016] The outer tube stop end face 103 is used to position the axial position of the outer tube, and the outer tube positioning hole 101 is used to position the radial position of the outer tube. The outer surface of the outer tube is sealed with the tooling through the sealing ring 3 to prevent the filling medium from overflowing under a certain pressure. To further ensure that the outer tube will not move axially during the filling process, the double-layer tube medium filling tooling is designed with an outer tube set thread hole 106 in the circumferential direction, and the outer tube is fixed by the outer tube fastening screw 2.

[0017] During filling, the filling medium under a certain pressure enters the second-stage hole through the inlet of the quick-connect structure connector 109, and then enters the interlayer between the outer tube 5 and the inner tube 6 until the interlayer is filled. During the process, the outer tube sealing ring 3 and the inner tube sealing ring 3 form a sealing pair with the guide tube, the outer tube sealing ring groove 105, and the inner tube sealing ring groove 107 to prevent the filling medium from overflowing under a certain pressure.

[0018] The above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Any modifications or equivalent substitutions made by those skilled in the art to the technical solution of this utility model, as long as they do not depart from the spirit and scope of the technical solution of this utility model, are all covered within the scope of the claims of this utility model.

Claims

1. A double-layer tube medium filling device, characterized in that: The device includes a filling fixture (1), an outer tube fastening screw (2), a sealing ring (3), and an inner tube fastening screw (4). The filling fixture (1) is a cylinder with a multi-stage stepped inner hole. The inner diameter of the stepped inner hole decreases from top to bottom. From top to bottom, the first stage hole is the outer tube positioning hole (101), the third stage hole is the inner tube positioning hole (102), the upper end face of the second stage hole is the outer tube stop end face (103), and the upper end face of the fourth stage hole is the inner tube stop end face (104). The end face of the outer tube positioning hole (101) is provided with an outer tube sealing ring groove (105) away from the axial direction and avoids the outer tube. The sealing ring groove (105) is provided with an outer tube set thread hole (106) that mates with the outer tube fastening screw (2). The inner tube positioning hole (102) has an inner tube sealing ring groove (107) facing away from the axial direction. The inner tube set thread hole (108) is provided away from the inner tube sealing ring groove (107) and mates with the inner tube fastening screw (4). The filling tool (1) has a quick-connect structure connector (109) on its outer side. The quick-connect structure connector (109) has a through hole that communicates with the second stage hole. There are two sealing rings (3), which are respectively placed in the outer tube sealing ring groove (105) and the inner tube sealing ring groove (107).

2. The double-layer tube medium filling device according to claim 1, characterized in that: The outer tube set threaded hole (106) is provided with three sets of outer tube fastening screws (2).

3. The double-layer tube medium filling device according to claim 1, characterized in that: The inner tube set threaded hole (108) is provided with three sets of inner tube fastening screws (4).

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