CN103123020B - A kind of pipeline rigid connection structure through casing - Google Patents

Abstract

A pipeline rigid connection structure passing through the casing, characterized in that it includes the casing, casing mounting base, lead-out pipe sleeve, bolt, long threaded external cone joint, locking screw sleeve, external nut, flat nozzle , Conduit; wherein: the casing mounting seat is welded or riveted on the casing, the lead-out pipe sleeve is fixed on the casing mounting seat by bolts, the floating sleeve cooperates with the long-threaded outer cone joint with a small clearance in the circumferential direction, and the long thread The outer cone joint is threadedly connected with the locking screw sleeve, and the external nut, flat nozzle, and conduit are welded into one body, and the pipeline assembly is completed after the casing is assembled. The invention has the advantages of simple structure, few parts, reliable operation, accurate assembly of pipelines in the casing, tight fit between the upper and lower end faces of the lead-out tube sleeve, and tightness at the opening of the casing. There are no small parts installed independently during pipeline assembly, which effectively avoids the hidden danger of parts falling into the engine duct through the casing hole seat, and improves the maintainability of the pipeline.

Description

A pipeline rigid connection structure passing through the casing

technical field

The invention relates to the field of aero-engines, in particular to a rigid connection structure of pipelines (with a diameter of φ10-φ16) passing through the casing.

Background technique

The pipes passing through the casing on traditional engines adopt different sealing structures according to their diameters and transmission media. Generally, pipelines with diameters from φ8 to φ36 adopt an integrated sealing structure that passes through the casing, that is, the joints on the pipeline in the casing are exposed outside the casing, and the ball-and-socket structure between the pipeline and the casing is used to seal and cold-state angle. compensate.

Due to the limitation of the laying space of the external joint extending out of the casing, the bent pipe structure is often used to reduce it to the height of the casing. Therefore, when it is necessary to disassemble the casing in half for condition-based maintenance, a large amount of disassembly is required to remove the pipeline passing through the casing. The structure can be realized, and the workload is relatively large.

For this reason, on the basis that the tube shape of the pipeline itself in the casing has the ability to compensate for installation and thermal expansion, it is necessary to design a rigid connection structure for the pipeline passing through the casing to reduce the number of connectors and realize the integration of the casing and the pipeline. Installation and sealing requirements improve the assembly and maintainability of pipelines passing through the receiver.

Contents of the invention

The purpose of the present invention is to improve the assembly and maintainability of pipelines passing through the casing, and in particular to provide a rigid connection structure of pipelines passing through the casing.

The invention provides a pipeline rigid connection structure passing through the casing, which is characterized in that it includes a casing 1, a casing mounting seat 2, a lead pipe sleeve 3, a bolt 4, a long threaded outer cone joint 5, a locking Screw sleeve 6, external nut 7, flat nozzle 8, conduit 9;

Among them: the casing mount 2 is welded or riveted on the casing 1, the outlet pipe sleeve 3 is fixed on the casing mount 2 by bolts 4, the outlet pipe sleeve 3 and the long threaded outer cone joint 5 have a small circumferential stop. Clearance fit, the long threaded outer cone joint 5 is threadedly connected with the locking screw sleeve 6, and the external nut 7, the flat nozzle 8, and the conduit 9 are welded into one body, and the pipeline assembly is completed after the casing is assembled.

The outlet pipe sleeve 3 and the long-threaded outer taper joint 5 on the inner pipeline of the casing 1 are matched with a small clearance in the circumferential direction.

The outlet pipe sleeve 3 is fixed on the casing mount 2 with 4 or 6 bolts 4 .

The locking nut 6 adopts 4 or 6 round table wrenches with grooves, which are used to press the long threaded external cone joint 5 to realize rigid connection and sealing at the opening of the casing.

The rigid connection structure of the pipeline passing through the casing, the rigid connection of the lead-out pipe sleeve 3, the long-threaded outer cone joint 5, and the locking screw sleeve 6, when installing the external pipeline of the casing, the installation reaction torque is applied as a whole .

Advantages of the present invention:

Based on the premise that the pipeline in the casing relies on its own tubular shape to compensate for cold and hot states, the rigid connection structure of the pipeline passing through the casing is simple, the number of parts is small, and the work is reliable. The sleeve of the outlet pipe is rigidly connected with the casing, and it is designed to cooperate with the small clearance of the circumferential stop of the long-threaded external cone joint to ensure the precise assembly of the pipeline in the casing. The locking screw sleeve is threadedly connected with the long-threaded external taper joint, so that the upper and lower end faces of the lead-out pipe sleeve are closely matched, ensuring the sealing of the opening of the casing. The rigid connection between the three provides counter torque for the installation of the pipeline outside the casing. Since there are no independently installed small parts during pipeline assembly, the hidden danger of parts falling into the engine duct through the casing hole seat is effectively avoided, and the maintainability of the pipeline is improved.

Description of drawings

Figure 1 is a cross-sectional view of the pipeline sealing structure passing through the casing.

detailed description

Example 1

This embodiment provides a pipeline rigid connection structure passing through the casing, which is characterized in that it includes a casing 1, a casing mounting seat 2, a lead pipe sleeve 3, a bolt 4, a long threaded external cone joint 5, a lock Tightening screw sleeve 6, external nut 7, flat nozzle 8, conduit 9;

Among them: the casing mount 2 is welded or riveted on the casing 1, the outlet pipe sleeve 3 is fixed on the casing mount 2 by bolts 4, the outlet pipe sleeve 3 and the long threaded outer cone joint 5 have a small circumferential stop. Clearance fit, the long threaded outer cone joint 5 is threadedly connected with the locking screw sleeve 6, and the external nut 7, the flat nozzle 8, and the conduit 9 are welded into one body, and the pipeline assembly is completed after the casing is assembled.

The outlet pipe sleeve 3 and the long-threaded outer taper joint 5 on the inner pipeline of the casing 1 are matched with a small clearance in the circumferential direction.

The outlet pipe sleeve 3 is fixed on the casing mount 2 by four bolts 4 .

The locking nut 6 adopts 4 round table wrenches with grooves, which are used to press the long threaded external cone joint 5 to realize rigid connection and sealing at the opening of the casing.

The rigid connection structure of the pipeline passing through the casing, the rigid connection of the lead-out pipe sleeve 3, the long-threaded outer cone joint 5, and the locking screw sleeve 6, when installing the external pipeline of the casing, the installation reaction torque is applied as a whole .

Example 2

This embodiment provides a pipeline rigid connection structure passing through the casing, which is characterized in that it includes a casing 1, a casing mounting seat 2, a lead pipe sleeve 3, a bolt 4, a long threaded external cone joint 5, a lock Tightening screw sleeve 6, external nut 7, flat nozzle 8, conduit 9;

Among them: the casing mount 2 is welded or riveted on the casing 1, the outlet pipe sleeve 3 is fixed on the casing mount 2 by bolts 4, the outlet pipe sleeve 3 and the long threaded outer cone joint 5 have a small circumferential stop. Clearance fit, the long threaded outer cone joint 5 is threadedly connected with the locking screw sleeve 6, and the external nut 7, the flat nozzle 8, and the conduit 9 are welded into one body, and the pipeline assembly is completed after the casing is assembled.

The outlet pipe sleeve 3 and the long-threaded outer taper joint 5 on the inner pipeline of the casing 1 are matched with a small clearance in the circumferential direction.

The outlet pipe sleeve 3 is fixed on the casing mounting seat 2 with six bolts 4 .

The locking nut 6 adopts 6 round table wrenches with grooves, which are used to press the long threaded external cone joint 5 to realize rigid connection and sealing at the opening of the casing.

The rigid connection structure of the pipeline passing through the casing, the rigid connection of the lead-out pipe sleeve 3, the long-threaded outer cone joint 5, and the locking screw sleeve 6, when installing the external pipeline of the casing, the installation reaction torque is applied as a whole .

Claims (4)

1. A pipeline rigid connection structure passing through the casing, characterized in that: it includes the casing (1), casing mounting base (2), lead-out pipe sleeve (3), bolts (4), long threaded outer Cone joint (5), lock nut (6), external nut (7), flat nozzle (8), conduit (9); Among them: the casing mount (2) is welded or riveted on the casing (1), the outlet tube sleeve (3) is fixed on the casing mount (2) by bolts (4), and the outlet tube sleeve (3) Cooperate with the long threaded outer cone joint (5) with a small circumferential stop gap, the long threaded outer cone joint (5) is threaded with the lock nut (6), plus the nut (7), flat nozzle (8), and conduit (9) It is welded into one body, and the pipeline assembly is completed after the casing is assembled. 2. According to claim 1, the pipeline rigid connection structure passing through the casing is characterized in that: the outlet pipe sleeve (3) is fixed on the casing mounting seat by 4 or 6 bolts (4) (2) up. 3. The pipeline rigid connection structure through the casing according to claim 1, characterized in that: the locking nut (6) adopts 4 or 6 round table wrenches with grooves for pressing Tighten the long threaded external cone joint (5) to realize rigid connection and seal at the opening of the casing. 4. According to claim 1, the pipeline rigid connection structure passing through the casing is characterized in that: the lead-out pipe sleeve (3), the long-threaded external cone joint (5), and the locking screw sleeve (6) are rigidly connected , when installing the pipeline outside the casing, the overall installation reaction torque is applied.