An aviation pipeline connecting device with an over-plate structure and double-layer sealing

Abstract

This utility model discloses a structure with a partition plate and a double-layer sealing connector, including a through-frame sleeve, a movable flange, a nut, a spring plate, a retaining ring, a sleeve, a sealing ring, a connector housing, and a double-sealing groove sleeve. The through-frame sleeve and the double-sealing groove sleeve are sealed together by the sleeve. The connector housing is placed outside the sleeve to provide a secondary sealing connection between the through-frame sleeve and the double-sealing groove sleeve. The outer side of the connection end between the through-frame sleeve and the connector housing is sealed by the nut, spring plate, and retaining ring. The movable flange is placed outside the end of the through-frame sleeve away from the double-sealing groove sleeve. Sealing rings are provided at the connection points between the sleeve and the through-frame sleeve and the double-sealing groove sleeve, as well as at the connection points between the connector housing and the through-frame sleeve and the double-sealing groove sleeve. This design eliminates the need to consider flange positioning, improves the accuracy and efficiency of pipeline welding, significantly increases the tolerance for manufacturing errors during pipeline installation, improves the survival rate of connectors due to single-point failures, and achieves self-locking performance at the ends.

Description

Technical Field

[0001] This utility model relates to the field of aviation pipeline connection technology, and in particular to an aviation pipeline connection device with a baffle structure and double-layer sealing, which is suitable for fluid systems such as fuel. Background Technology

[0002] Current compensating connection pipelines often use two sections of conduit with welded flanges at the diaphragm, and then seal the connection with the frame plate using gaskets or rubber rings. The above connection method has the following main drawbacks:

[0003] 1. Insufficient sealing performance: The sealing relies on the rubber ring or gasket on the end face of the partition plate, which requires high treatment of the frame plate. Improper treatment will directly affect the sealing performance.

[0004] 2. No compensation capability: The flange and diaphragm structure is a relatively fixed structure and cannot compensate for the axial displacement of the pipeline caused by the deformation of the machine body structure. Utility Model Content

[0005] The purpose of this invention is to improve the sealing performance of fluid pipelines when passing through diaphragms, providing dynamic sealing compensation for the pipeline. It provides a structure with a diaphragm-passing structure and a double-layer sealing connection, including a through-frame sleeve, a movable flange, a nut, a spring plate, a retaining ring, a sleeve, a sealing ring, a connector housing, and a double-seal groove sleeve. The through-frame sleeve and the double-seal groove sleeve are sealed together by the sleeve. The connector housing is placed outside the sleeve to provide a secondary sealing connection between the through-frame sleeve and the double-seal groove sleeve. The outer side of the connection end between the through-frame sleeve and the connector housing is sealed by a nut, a spring plate, and a retaining ring. The movable flange is placed outside the end of the through-frame sleeve away from the double-seal groove sleeve. Sealing rings are provided at the connection points between the sleeve and the through-frame sleeve and the double-seal groove sleeve, and at the connection points between the connector housing and the through-frame sleeve and the double-seal groove sleeve.

[0006] Preferably, the outer side of the frame sleeve is provided with protrusion 1, protrusion 2, and protrusion 3 in sequence from left to right along the circumferential direction, wherein protrusion 2 and protrusion 3 are respectively provided with annular groove 1 and annular groove 2 on the outer side along the radial direction to cooperate with the sealing ring.

[0007] Preferably, the outer side of the double sealing groove sleeve is provided with protrusion four and protrusion five in sequence from left to right along the circumferential direction, and the outer side of protrusion four and protrusion five is provided with annular groove three and annular groove four respectively in the radial direction to cooperate with the sealing ring.

[0008] Preferably, the movable flange has a T-shaped through hole at its center, the large diameter end of the T-shaped through hole is sealed to the outer diameter of the protrusion, and the four corners of the movable flange are provided with screw holes avoiding the T-shaped through hole.

[0009] Preferably, the nut has a radially protruding ring on the inner side of one end and a radially protruding groove on the inner side of the other end. The protruding ring, on the side away from the nut end, limits the retaining ring. The groove is used to place a spring plate. The connector housing has a grooved flange on the outer side near the frame sleeve. A connecting tube is provided in the middle of the outer side of the connector housing. The nut and connector housing are connected by threads. A spring plate is provided on the nut, which cooperates with the grooved flange on the connector housing to form a self-locking structure, effectively preventing nut connection failure due to external factors such as vibration.

[0010] The connector housing integrates a sleeve function, forming a sealing pair with the two outer sealing rings. The inner sleeve also forms a sealing pair with the inner sealing ring. If the inner sleeve fails, the outer sealing structure intervenes to seal. Simultaneously, the operating status is detected by a discharge pipe or sensor located at the top of the connector housing. This prevents product malfunction due to a single point of seal failure. The double-layer sealing connector provides a sealing margin for the connector, preventing single-point failures.

[0011] The beneficial effects of this utility model are:

[0012] 1. The use of a movable flange structure eliminates the need to consider flange positioning, thereby improving the accuracy and efficiency of pipeline welding.

[0013] 2. The use of a movable flange structure can significantly improve the tolerance rate of manufacturing errors during pipeline installation.

[0014] 3. The double-layer sealing structure can improve the survival rate of connectors that fail due to single-point failure.

[0015] 4. The connector adopts a threaded connection and has a self-locking structure at the end, which can improve the self-locking performance of the connector.

[0016] 5. Improve the sealing performance of fluid pipelines when passing through baffles, and provide dynamic sealing compensation for the pipelines. Attached Figure Description

[0017] 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:

[0018] Figure 1 A schematic diagram of the assembly structure of the aviation pipeline connection device with a baffle structure and double-layer sealing provided by this utility model;

[0019] Figure 2 This is a schematic diagram of the structure of the through-frame sleeve provided by this utility model;

[0020] Figure 3 A schematic diagram of the movable flange provided by this utility model;

[0021] Figure 4 for Figure 3 AA-direction cross section;

[0022] Figure 5 A bottom view of the movable flange provided for this utility model;

[0023] Figure 6 A schematic diagram of the nut provided by this utility model.

[0024] Figure 7 A schematic diagram of the structure of the connector housing provided by this utility model.

[0025] Figure 8 Top view of the connector housing provided by this utility model

[0026] Figure 9 The structural schematic diagram of the double-sealed groove sleeve provided by this utility model shows: 1-through-frame sleeve, 101-protrusion one, 102-protrusion two, 102.1-annular groove one, 103-protrusion three, 103.1-annular groove two.

[0027] 2-Modible flange, 201-T-type through hole, 202-Large diameter end, 203-Screw hole

[0028] 3-Nut, 301-Raised Ring, 302-Ring Groove

[0029] 4-Spring sheet, 5-Retaining ring, 6-Sleeve, 7-Sealing ring

[0030] 8-Connector housing, 801-Flange (801), 802-Connecting pipe

[0031] 9-Double sealing groove sleeve, 901-Protrusion four, 901.1-Annular groove three, 902-Protrusion five, 902.1-Annular groove four, 10-Conduit one, 11-Conduit two, 12-Baffle, h-Connection margin. Detailed Implementation

[0032] 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.

[0033] Please see Figure 1The figure shows a schematic diagram of the assembly structure of the aviation pipeline connection device with a partition structure and double-layer sealing provided by this utility model. It includes a frame sleeve 1, a movable flange 2, a nut 3, a spring plate 4, a retaining ring 5, a sleeve 6, a sealing ring 7, a joint housing 8, and a double-sealing groove sleeve 9. The frame sleeve 1 and the double-sealing groove sleeve 9 are sealed and connected by the sleeve 6. The joint housing 8 is placed outside the sleeve 6 to provide a secondary sealing connection between the frame sleeve 1 and the double-sealing groove sleeve 9. The outer side of the connection end between the frame sleeve 1 and the joint housing 8 is sealed and connected by the nut 3, the spring plate 4, and the retaining ring 5. The movable flange 2 is placed outside the end of the frame sleeve 1 away from the double-sealing groove sleeve 9. Sealing rings 7 are provided at the connection points of the sleeve 6 with the frame sleeve 1 and the double-sealing groove sleeve 9, and at the connection points of the joint housing 8 with the frame sleeve 1 and the double-sealing groove sleeve 9.

[0034] like Figure 2 As shown, the outer side of the frame sleeve 1 is provided with protrusion 101, protrusion 2 102 and protrusion 3 103 in sequence from left to right along the circumferential direction. The outer sides of protrusion 2 102 and protrusion 3 103 are respectively provided with annular groove 102.1 and annular groove 2 103.1 along the radial direction to cooperate with the sealing ring 7.

[0035] like Figure 9 As shown, the outer side of the double sealing groove sleeve 9 is provided with protrusion four 901 and protrusion five 902 in sequence from left to right along the circumferential direction. The outer side of protrusion four 901 and protrusion five 902 is provided with annular groove three 901.1 and annular groove four 902.1 respectively along the radial direction to cooperate with the sealing ring 7.

[0036] like Figure 3-5 As shown, the movable flange 2 has a T-shaped through hole 201 at its center. The large diameter end 202 of the T-shaped through hole 201 is sealed to the outer diameter of the protrusion 101. The four corners of the movable flange 2 are provided with screw holes 203, avoiding the T-shaped through hole 201.

[0037] like Figure 6 As shown, a convex ring 301 is provided radially on the inner side of one end of the nut 3, and an annular groove 302 is provided radially on the inner side of the other end. The convex ring 301 limits the retaining ring 5 on the side away from the end of the nut 3, and the annular groove 302 is used to place the spring plate 4.

[0038] like Figure 7-8 As shown, the connector housing 8 has a grooved flange 801 on the outer side near the frame sleeve 1, and a connecting pipe 802 is provided in the middle of the outer side of the connector housing 8.

[0039] The conduit 10 is sealed to the frame sleeve 1, and the double-seal groove sleeve 9 is sealed to the conduit 11. The frame sleeve 1 and the partition 12 are fixed by the movable flange 2 and its matching bolts and nuts, which can provide a fixing point for the rear connecting parts, avoiding the sealing failure caused by the excessive flexibility of the pipeline and the twisting of the sealing ring 7 in the sealing ring groove. The sealing connection between the frame sleeve 1 and the conduit 10 is welded. Before welding, the movable flange 2 is pre-installed on the pipeline. After welding, since the movable flange 2 and the pipeline are relatively movable, there is no need to consider the flange orientation positioning during welding, which improves the accuracy and efficiency of welding. The inner cavity of the connector housing 8 integrates the sleeve function, which cooperates with the two outer sealing rings to form a sealing pair. The inner sleeve 6 cooperates with the inner sealing ring 7 to form a sealing pair. When the inner sleeve fails, the outer sealing structure intervenes to seal. At the same time, the connecting pipe 802 arranged on the outside of the connector housing 8 can be set as a discharge pipe or sensor to detect the working status, avoiding the loss of product function due to single-point sealing failure of the connecting parts. The connector is connected to the nut 3 and the connector housing 8 by threads. A spring plate 4 is provided on the nut 3, which cooperates with the grooved flange 801 on the connector housing 8 to form a self-locking structure, effectively preventing the nut connection failure caused by external factors such as vibration. The connection margin h between the first conduit 10 and the second conduit 11 can be up to 10mm to prevent single-point failure.

[0040] 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. An aviation pipeline connection device with a baffle structure and double-layer sealing, characterized in that: The assembly includes a frame sleeve (1), a movable flange (2), a nut (3), a spring plate (4), a retaining ring (5), a sleeve (6), a sealing ring (7), a joint housing (8), and a double-seal groove sleeve (9). The frame sleeve (1) and the double-seal groove sleeve (9) are sealed together by the sleeve (6). The joint housing (8) is placed outside the sleeve (6) to provide a secondary sealing connection between the frame sleeve (1) and the double-seal groove sleeve (9). The outer side of the connection end between the frame sleeve (1) and the joint housing (8) is sealed together by the nut (3), the spring plate (4), and the retaining ring (5). The movable flange (2) is placed outside the frame sleeve (1) away from the double-seal groove sleeve (9). The sleeve (6) is provided with a sealing ring (7) at the connection point between the frame sleeve (1) and the double-seal groove sleeve (9), and at the connection point between the joint housing (8) and the frame sleeve (1) and the double-seal groove sleeve (9).

2. The aviation pipeline connection device with a baffle structure and double-layer sealing as described in claim 1, characterized in that: The outer side of the frame sleeve (1) is provided with protrusion one (101), protrusion two (102) and protrusion three (103) in sequence from left to right along the circumferential direction. The outer side of protrusion two (102) and protrusion three (103) are respectively provided with annular groove one (102.1) and annular groove two (103.1) along the radial direction to cooperate with the sealing ring (7).

3. The aviation pipeline connection device with a baffle structure and double-layer sealing as described in claim 1, characterized in that: The outer side of the double sealing groove sleeve (9) is provided with protrusion four (901) and protrusion (902) in the circumferential direction from left to right. The outer side of protrusion four (901) and protrusion (902) is provided with annular groove three (901.1) and annular groove four (902.1) respectively in the radial direction to cooperate with the sealing ring (7).

4. The aviation pipeline connection device with a baffle structure and double-layer sealing as described in claim 2, characterized in that: The movable flange (2) has a T-shaped through hole (201) at its center. The large diameter end (202) of the T-shaped through hole (201) is sealed to the outer diameter of the protrusion (101). The four corners of the movable flange (2) are provided with screw holes (203) that avoid the T-shaped through hole (201).

5. The aviation pipeline connection device with a baffle structure and double-layer sealing as described in claim 1, characterized in that: The nut (3) has a convex ring (301) on the inner side of one end and a ring groove (302) on the inner side of the other end. The convex ring (301) limits the retaining ring (5) on the side away from the end of the nut (3). The ring groove (302) is used to place the spring plate (4).

6. The aviation pipeline connection device with a baffle structure and double-layer sealing as described in claim 1, characterized in that: The connector housing (8) has a grooved flange (801) on the outer side near the frame sleeve (1), and a connecting pipe (802) is provided in the middle of the outer side of the connector housing (8).

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