Corrosion-resistant combined sealing structure

Abstract

The utility model relates to the technical field of sealing structures, in particular to a corrosion-resistant combined type sealing structure which comprises a flange seat, a corresponding flange cover is arranged at the top of the flange seat, a step groove is formed in the top of the flange seat, a step protrusion is arranged at the bottom of the flange cover, and the flange seat is in threaded connection with the flange cover. A plurality of threaded blocks are fixedly mounted at the bottom of the flange seat, and an extrusion ring is arranged at the top of the flange cover; the structure of the threaded ring and the threaded groove is adopted, so that the flange cover and the flange base can be fastened in a threaded mode, sealing is achieved by extruding the first rubber ring and the second rubber ring, the threaded rod is in threaded connection with the threaded block, the extrusion ring downwards and elastically extrudes the flange cover through the spring, and the flange cover can always downwards extrude the flange base; even if the threaded fastening of the flange cover and the flange seat is loosened, the flange cover is always in the condition of extruding the rubber ring I and the rubber ring II under the action of the spring, so that the sealing performance can be ensured.

Description

Technical Field

[0001] This utility model relates to the field of sealing structure technology, specifically a corrosion-resistant combined sealing structure. Background Technology

[0002] In the aviation field, corrosion-resistant composite sealing structures refer to structural designs that can maintain sealing performance in harsh environments. Aircraft face various environmental challenges during flight, especially corrosion from media such as air, fuel, and engine oil. Therefore, the requirements for sealing materials and structures are extremely stringent. Corrosion-resistant materials can effectively resist the erosion of various corrosive media, ensuring that the sealing performance is not affected. During the operation of aircraft, the sealing structure needs to prevent leakage of media such as fuel, oil, and air. Efficient sealing structure designs need to consider factors such as pressure changes, temperature fluctuations, and vibrations to ensure long-term reliability.

[0003] Chinese patent CN220727442U discloses a sealing structure for an aero-engine bleed air pipeline, including a female tenon flange and a male tenon flange at the lower end of the female tenon flange. The pressing edge will press the female tenon flange and the male tenon flange, so that the structure fits tightly and the sealing gasket is compressed, which improves the sealing effect of the sealing structure. At the same time, multiple clamp structures are connected to each other by top parts and positioning holes. During the disassembly and assembly of the sealing structure, it is not necessary to manually handle all the clamps to complete the disassembly and assembly of the sealing structure, which improves the efficiency of disassembly, assembly and maintenance of the sealing structure.

[0004] The aforementioned and similar existing technologies enable flanges to be sealed through clamp connections. However, vibrations are inevitable during aircraft operation. Under prolonged vibration, clamps or simple threaded structures are prone to loosening, thereby reducing the sealing performance of the sealing structure and increasing the frequency of maintenance.

[0005] Therefore, this utility model provides a corrosion-resistant combined sealing structure that can provide good sealing performance and will not loosen under long-term vibration. Utility Model Content

[0006] To address the problem that existing technologies using simple clamps or threaded connections are prone to loosening under vibration, leading to reduced sealing performance, a corrosion-resistant combined sealing structure has been designed.

[0007] The technical solution adopted by this utility model to solve its technical problem is: a corrosion-resistant combined sealing structure, including a flange seat, a corresponding flange cover on the top of the flange seat, a stepped groove on the top of the flange seat, a rubber ring one fixedly installed at a right angle position inside the stepped groove, a stepped protrusion on the bottom of the flange cover, a rubber ring two fixedly installed at the bottom of the stepped protrusion, the flange seat and the flange cover being threadedly connected, a plurality of threaded blocks fixedly installed at the bottom of the flange seat, and a compression ring on the top of the flange cover.

[0008] Furthermore, a slot is provided at the top of the stepped groove corresponding to the position of the second rubber ring, and the same slot is provided at the position of the stepped protrusion corresponding to the position of the first rubber ring. The two slots contact the first rubber ring and the second rubber ring respectively.

[0009] Furthermore, a threaded ring is fixedly installed on the top of the flange seat, and a threaded groove is opened at the bottom of the flange cover, with the threaded ring and the threaded groove being threadedly connected.

[0010] Furthermore, the flange cover has multiple limiting holes that extend through its interior.

[0011] Furthermore, multiple sets of extrusion plates are fixedly installed at the bottom of the extrusion ring, with two extrusion plates in each set. Multiple springs are fixedly installed at the bottom of the extrusion ring, with each spring located between the two extrusion plates in each set. Multiple limiting grooves are provided at the top of the extrusion ring, with the limiting grooves located between the two extrusion plates in each set.

[0012] Furthermore, a screw is threaded onto the top of the threaded block, and the screw passes through the inner side of the limiting hole, passes through the interior of the compression ring, and is located inside the spring.

[0013] Furthermore, a rotating column is fixedly installed on the side of the screw away from the threaded block, and the rotating column is located at the top of the extrusion ring. A limiting plate is fixedly installed at the intersection of the screw and the rotating column, and the limiting plate is located inside the limiting groove.

[0014] The beneficial effects of this utility model are:

[0015] The corrosion-resistant combined sealing structure described in this utility model adopts a threaded ring and threaded groove structure, which enables the flange cover and flange seat to be threadedly fastened. The seal is achieved by compressing rubber ring one and rubber ring two. Furthermore, through the threaded connection between the screw and the threaded block, the compression ring elastically compresses the flange cover downward through the spring, ensuring that the flange cover always compresses the flange seat downward. Even if the threaded fastening between the flange cover and the flange seat becomes loose, the flange cover will always be in a state of compressing rubber ring one and rubber ring two under the action of the spring, thereby ensuring the sealing performance. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0017] Figure 1 This is a three-dimensional structural diagram of the sealing structure body of this utility model;

[0018] Figure 2 This is a cross-sectional three-dimensional structural diagram of the sealing structure of this utility model;

[0019] Figure 3 This is a three-dimensional structural diagram of the flange seat and flange cover of this utility model after they are separated.

[0020] Figure 4 This is a three-dimensional schematic diagram of the bottom structure of the flange seat and flange cover of this utility model after they are separated.

[0021] Figure 5 This is a three-dimensional structural diagram of the extrusion ring of this utility model.

[0022] In the diagram: 1. Flange seat; 2. Step groove; 3. Rubber ring one; 4. Slot; 5. Threaded ring; 6. Threaded block; 7. Flange cover; 8. Step protrusion; 9. Rubber ring two; 10. Threaded groove; 11. Limiting hole; 12. Extrusion ring; 13. Extrusion plate; 14. Spring; 15. Limiting groove; 16. Screw; 17. Limiting plate; 18. Rotary column. Detailed Implementation

[0023] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0024] Example: Figures 1-5 As shown, the corrosion-resistant combined sealing structure of this utility model includes a flange seat 1, a stepped groove 2 is provided on the top of the flange seat 1, a rubber ring 3 is fixedly installed at the right angle position inside the stepped groove 2, a plurality of threaded blocks 6 are fixedly installed on the bottom of the flange seat 1, a slot 4 is provided on the top of the stepped groove 2 corresponding to the position of the rubber ring 9, and a threaded ring 5 is fixedly installed on the top of the flange seat 1.

[0025] Specifically, the flange seat 1 provides space for the stepped groove 2, the stepped groove 2 provides space for the stepped protrusion 8 of the flange cover 7, the flange seat 1 provides stable support for the threaded block 6, the top of the threaded block 6 has a threaded hole that can be threadedly connected to the screw 16, the stepped groove 2 provides space for the slot 4, the slot 4 can fit against the surface of the rubber ring 3 to prevent damage to the surface of the rubber ring 3 when it is squeezed, and the flange seat 1 provides stable support for the threaded ring 5 so that the threaded seat can be threadedly connected to the threaded cover.

[0026] In this embodiment, a corresponding flange cover 7 is provided on the top of the flange seat 1, and a stepped protrusion 8 is provided on the bottom of the flange cover 7. A rubber ring 9 is fixedly installed on the bottom of the stepped protrusion 8. The flange seat 1 and the flange cover 7 are threadedly connected. The stepped protrusion 8 is provided with the same groove 4 at the position corresponding to the rubber ring 3. The two grooves 4 are in contact with the rubber ring 3 and the rubber ring 9 respectively. A threaded groove 10 is provided on the bottom of the flange cover 7, and the threaded ring 5 is threadedly connected to the threaded groove 10. Multiple limiting holes 11 are provided through the inside of the flange cover 7.

[0027] Specifically, the flange cover 7 provides stable support for the stepped protrusion 8, provides opening space for the threaded groove 10, and provides threaded connection for the threaded ring 5. Utilizing the right-angle characteristic of the stepped protrusion 8, when external corrosive media enter through the gap between the flange seat 1 and the flange cover 7, it needs to pass through two vertically upward paths to enter, reducing the possibility of corrosive media passing through the gap between the flange seat 1 and the flange cover 7. At the same time, the compression of the rubber ring 1 3 and rubber ring 2 9 between the flange seat 1 and the flange cover 7, as well as the threaded sealing effect, greatly improves the sealing performance between the flange seat 1 and the flange cover 7. The flange cover 7 provides through opening space for the limiting hole 11.

[0028] In this embodiment, a compression ring 12 is provided on the top of the flange cover 7. Multiple sets of compression plates 13 are fixedly installed on the bottom of the compression ring 12, with two compression plates 13 in each set. Multiple springs 14 are fixedly installed on the bottom of the compression ring 12, and each spring 14 is located between the two compression plates 13 in each set. Multiple limiting grooves 15 are provided on the top of the compression ring 12, and the limiting grooves 15 are located between the two compression plates 13 in each set. A screw 16 is threadedly installed on the top of the threaded block 6, and the screw 16 passes through the inner side of the limiting hole 11. The screw 16 passes through the interior of the compression ring 12 and is located inside the springs 14. A swivel column 18 is fixedly installed on the side of the screw 16 away from the threaded block 6, and the swivel column 18 is located on the top of the compression ring 12. A limiting plate 17 is fixedly installed at the intersection of the screw 16 and the swivel column 18, and the limiting plate 17 is located inside the limiting groove 15.

[0029] Specifically, the threaded block 6 provides threading for the screw 16, the screw 16 provides stable support for the rotating column 18, the limiting hole 11 cooperates with the screw 16 to provide limiting for the flange cover 7, preventing relative rotation between the flange cover 7 and the flange seat 1, the rotating column 18 provides gripping support for the operator, the compression ring 12 provides stable support for the compression plate 13 and the spring 14, the compression ring 12 provides opening space for the limiting groove 15, the limiting groove 15 provides placement space for the limiting plate 17, and the contact action between the limiting groove 15 and the limiting plate 17 prevents the screw 16 from rotating. The compression ring 12, through the spring 14, provides elastic compression for the flange cover 7, allowing the flange cover 7 to tightly press against the flange seat 1, preventing the flange cover 7 from loosening and reducing the sealing performance.

[0030] Working principle: The operator first brings the flange seat 1 and flange cover 7 together on the sides with rubber ring 3 or rubber ring 9, causing the flange seat 1 to move the threaded ring 5 to the inside of the threaded groove 10 of the flange cover 7. The operator then grasps the flange seat 1 and flange cover 7 and rotates them in opposite directions, using the threaded action of the threaded ring 5 and the threaded groove 10 to thread the flange seat 1 and flange cover 7 together. After tightening, the limiting hole 11 of the flange cover 7 corresponds one-to-one with the threaded block 6. Then, the operator moves the compression ring 12 towards the top of the flange cover 7. The extrusion ring 12 drives the extrusion plate 13 to contact the top of the flange cover 7. At this time, the spring 14 is compressed under the action of the extrusion ring 12. The screw 16 is driven to pass through the extrusion ring 12 and the limiting hole 11 and be threaded to the threaded block 6. After tightening multiple screws 16, the extrusion ring 12 is released, and the extrusion ring 12 moves upward under the elastic force of the spring 14. The limiting groove 15 at the top of the extrusion ring 12 moves to the outside of the limiting plate 17. The limiting groove 15 limits the screw 16 by limiting the limiting plate 17.

[0031] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The descriptions of the above embodiments and specifications are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of protection claimed by this utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A corrosion-resistant combined sealing structure, comprising a flange seat (1), wherein a corresponding flange cover (7) is provided on the top of the flange seat (1), characterized in that: The flange seat (1) has a stepped groove (2) at the top. A rubber ring (3) is fixedly installed at the right angle position inside the stepped groove (2). The flange cover (7) has a stepped protrusion (8) at the bottom. A rubber ring (9) is fixedly installed at the bottom of the stepped protrusion (8). The flange seat (1) is threadedly connected to the flange cover (7). Multiple threaded blocks (6) are fixedly installed at the bottom of the flange seat (1). A compression ring (12) is provided at the top of the flange cover (7).

2. The corrosion-resistant combined sealing structure according to claim 1, characterized in that: The top of the stepped groove (2) is provided with a slot (4) corresponding to the position of the second rubber ring (9), and the stepped protrusion (8) is provided with the same slot (4) corresponding to the position of the first rubber ring (3). The two slots (4) are in contact with the first rubber ring (3) and the second rubber ring (9) respectively.

3. The corrosion-resistant combined sealing structure according to claim 2, characterized in that: A threaded ring (5) is fixedly installed on the top of the flange seat (1), and a threaded groove (10) is opened at the bottom of the flange cover (7), and the threaded ring (5) is threadedly connected to the threaded groove (10).

4. The corrosion-resistant combined sealing structure according to claim 1, characterized in that: The flange cover (7) has multiple limiting holes (11) through it.

5. The corrosion-resistant combined sealing structure according to claim 4, characterized in that: The bottom of the extrusion ring (12) is fixedly installed with multiple sets of extrusion plates (13), each set having two extrusion plates (13). The bottom of the extrusion ring (12) is fixedly installed with multiple springs (14), and each spring (14) is located between the two extrusion plates (13) of each set. The top of the extrusion ring (12) is provided with multiple limiting grooves (15), and the limiting grooves (15) are located between the two extrusion plates (13) of each set.

6. The corrosion-resistant combined sealing structure according to claim 5, characterized in that: The top of the threaded block (6) is threaded with a screw (16), and the screw (16) passes through the inner side of the limiting hole (11), passes through the interior of the extrusion ring (12), and is located inside the spring (14).

7. The corrosion-resistant combined sealing structure according to claim 6, characterized in that: A swivel column (18) is fixedly installed on the side of the screw (16) away from the threaded block (6), and the swivel column (18) is located at the top of the extrusion ring (12). A limit plate (17) is fixedly installed at the position where the screw (16) and the swivel column (18) intersect, and the limit plate (17) is located inside the limit groove (15).

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