A mechanical seal connection structure for air replacement pipelines in civil defense projects

Abstract

This application relates to a mechanical seal connection structure for air displacement ducts in civil defense engineering, belonging to the technical field of duct connection in civil defense engineering. It includes a first connecting frame, with a pair of fixing brackets fixedly connected to one side of the first connecting frame. Each fixing bracket is rotatably connected to a screw, and a moving rod is threaded onto the screw. This application, by setting up a first connecting frame, fixing brackets, screws, moving rods, guide blocks, a second connecting frame, connecting pins, and fixing components, uses the first and second connecting frames, instead of flanges, welded to both ends of the duct. When connecting ducts, the second connecting frame on one duct is aligned with the first connecting frame on the other duct, so that the connecting pin is inserted into the corresponding connecting hole on the first connecting frame. Then, by rotating the screw, the moving rod is moved. The fixing components, in conjunction with the guide block, fix the pair of connecting pins, achieving rapid duct connection, significantly shortening connection time, reducing maintenance difficulty, and improving duct connection efficiency.

Description

Technical Field

[0001] This application relates to the field of pipeline connection technology for civil defense engineering, and in particular to a mechanical seal connection structure for air displacement pipelines in civil defense engineering. Background Technology

[0002] Air replacement ducts in civil defense projects are the core system for maintaining the safety of the internal environment. They play a crucial role in extreme scenarios such as wartime air defense and peacetime disaster relief. They can efficiently circulate air between the inside and outside of the project, providing fresh air for the personnel inside. They can also accurately block the intrusion of harmful substances such as toxic gases, radioactive dust, and biochemical pollutants through specially designed filtration and barrier mechanisms. In terms of material selection, these ducts mostly use galvanized steel plates or stainless steel. Galvanized steel plates, with the electrochemical protection formed by the zinc layer on the surface, can effectively resist corrosion in humid environments and extend the service life of the ducts. Stainless steel, with its excellent impact resistance and weather resistance, can withstand the external impacts such as vibration and compression that the project may encounter, ensuring that the ducts maintain structural integrity under complex working conditions.

[0003] In the existing technology, air replacement pipes are mainly connected by flanges, which takes a long time to connect. Workers need to insert bolts into the holes one by one and then tighten multiple nuts in sequence, which can delay the installation or repair progress in emergencies. Summary of the Invention

[0004] The purpose of this application is to provide a mechanical seal connection structure for air displacement pipelines in civil defense projects, so as to solve the problems existing in the prior art.

[0005] The mechanical seal connection structure for air displacement pipelines in civil defense engineering provided in this application adopts the following technical solution: it includes a first connecting frame, a pair of fixing brackets fixedly connected to one side of the first connecting frame, a screw rotatably connected to each fixing bracket, a moving rod threadedly connected to the screw, and fixing components provided at both ends of the moving rod. Two pairs of guide blocks are symmetrically arranged on one side of the first connecting frame, and two pairs of connecting holes are opened on the first connecting frame. A second connecting frame is arranged on the side of the first connecting frame away from the guide blocks, and two pairs of connecting pins are fixedly connected to the side of the second connecting frame close to the first connecting frame. Each connecting pin is adapted to the corresponding connecting hole.

[0006] Preferably, the fixing component includes a protective cover, which is fixedly connected to one end of the moving rod. A fixing block is slidably connected to the protective cover, and a guide rod is fixedly connected to the bottom of the fixing block. A through movable groove is provided at the bottom of the protective cover, and the through movable groove is adapted to the guide rod.

[0007] Preferably, the guide block has a guide groove, which is adapted to the corresponding guide rod.

[0008] Preferably, the connecting pin has a limiting groove.

[0009] Preferably, a sealing groove is provided on the side of the first connecting frame away from the guide block, and a U-shaped sealing block is fixedly connected to the side of the second connecting frame close to the first connecting frame, wherein the U-shaped sealing block is adapted to the sealing groove.

[0010] Preferably, the first connecting frame has a receiving groove on the side away from the guide block, and a sealing ring is provided in the receiving groove.

[0011] Preferably, one end of the screw is coaxially fixedly connected to a circular block, and one side of the circular block has an internal hexagonal hole. The other end of the screw is rotatably connected to the first connecting frame.

[0012] In summary, this application includes at least one of the following beneficial technical effects:

[0013] 1. This application sets up a first connecting frame, a fixing bracket, a screw, a moving rod, a guide block, a second connecting frame, a connecting pin, and a fixing component. The first and second connecting frames are welded to both ends of the duct instead of flanges. When connecting ducts, the second connecting frame on one duct is aligned with the first connecting frame on the other duct, so that the connecting pin is inserted into the corresponding connecting hole on the first connecting frame. Then, by rotating the screw, the moving rod is moved. The fixing component, together with the guide block, fixes a pair of connecting pins, thereby realizing quick connection of ducts, greatly shortening the connection time, reducing maintenance difficulty, and improving the efficiency of duct connection.

[0014] 2. This application sets up a sealing groove, a U-shaped sealing block, and a sealing ring. When the duct is connected, the U-shaped sealing block on the second connecting frame is inserted into the sealing groove on the first connecting frame. The U-shaped sealing block and the sealing groove fit tightly together to form the first barrier. At the same time, the second connecting frame squeezes the sealing ring on the first connecting frame to form a second seal, reducing the risk of gas leakage. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this application;

[0016] Figure 2 This is a schematic diagram of the cross-sectional structure of the protective cover in this application;

[0017] Figure 3 This is a schematic diagram of the first connecting frame structure of this application;

[0018] Figure 4 This is a schematic cross-sectional view of the first connecting frame structure of this application;

[0019] Figure 5 This is a schematic diagram of the second connection frame structure of this application.

[0020] Explanation of reference numerals in the attached drawings: 1. First connecting frame; 2. Fixing bracket; 3. Screw; 4. Moving rod; 5. Guide block; 6. Second connecting frame; 7. Connecting pin; 8. Protective cover; 9. Fixing block; 10. Guide rod; 11. Guide groove; 12. Sealing groove; 13. U-shaped sealing block; 14. Sealing ring; 15. Circular block. Detailed Implementation

[0021] The following is in conjunction with the appendix Figure 1 -Appendix Figure 5 This application will be described in further detail below.

[0022] A mechanical seal connection structure for an air displacement pipeline in a civil defense project includes a first connecting frame 1. A pair of fixing brackets 2 are fixedly connected to one side of the first connecting frame 1. Each fixing bracket 2 is rotatably connected to a screw 3. A moving rod 4 is threadedly connected to the screw 3. Fixing components are provided at both ends of the moving rod 4. Two pairs of guide blocks 5 are symmetrically arranged on one side of the first connecting frame 1. Two pairs of connecting holes are opened on the first connecting frame 1. A second connecting frame 6 is arranged on the side of the first connecting frame 1 away from the guide blocks 5. Two pairs of connecting pins 7 are fixedly connected to the side of the second connecting frame 6 close to the first connecting frame 1. Each connecting pin 7 is adapted to the corresponding connecting hole.

[0023] Specifically, the first connecting frame 1 and the second connecting frame 6 are welded to both ends of the duct instead of the flange. When connecting the ducts, the second connecting frame 6 on one duct is aligned with the first connecting frame 1 on the other duct, so that the connecting pin 7 is inserted into the corresponding connecting hole on the first connecting frame 1. Then, by rotating the screw 3, the moving rod 5 is moved. The top and bottom of the moving rod 5 are in contact with the inner wall of the fixing frame 2, so that the moving rod 5 can slide along the inner wall of the fixing frame 2 to prevent the moving rod 5 from rotating. The fixing component, together with the guide block 5, fixes a pair of connecting pins 7, realizing quick connection of the duct, greatly shortening the connection time, reducing the maintenance difficulty, and improving the duct connection efficiency.

[0024] The fixing component includes a protective cover 8, which is fixedly connected to one end of the moving rod 4. A fixing block 9 is slidably connected to the protective cover 8, and a guide rod 10 is fixedly connected to the bottom of the fixing block 9. A through movable groove is opened at the bottom of the protective cover 8, which is adapted to the guide rod 10. A guide groove 11 is opened on the guide block 5, which is adapted to the corresponding guide rod 10. A limit groove is opened on the connecting pin 7.

[0025] Specifically, the protective cover 8 moves together with the moving rod 4, and the protective cover 8 drives the fixed block 9 to move together. The guide rod 10 moves along the guide groove 11, forcing the fixed block 9 to slide on the protective cover 8 and approach the connecting pin 7. The fixed block 9 falls into the limiting groove on the connecting pin 7. The moving rod 4 continues to move a distance. The fixed block 9 connects the first connecting frame 1 and the second connecting frame 6 together by squeezing the inner wall of the limiting groove.

[0026] A sealing groove 12 is provided on the side of the first connecting frame 1 away from the guide block 5, and a spiral sealing block 13 is fixedly connected on the side of the second connecting frame 6 close to the first connecting frame 1. The spiral sealing block 13 is adapted to the sealing groove 12.

[0027] Specifically, when the duct is connected, the U-shaped sealing block 13 on the second connecting frame 6 is inserted into the sealing groove 12 on the first connecting frame 1, and the U-shaped sealing block 13 fits tightly with the sealing groove 12 to form the first barrier.

[0028] The first connecting frame 1 has a receiving groove on the side away from the guide block 5, and a sealing ring 14 is provided in the receiving groove;

[0029] Specifically, the second connecting frame 6 presses against the sealing ring 14 on the first connecting frame 1 to form a second seal.

[0030] One end of the screw 3 is coaxially fixedly connected to a circular block 15, and a hexagonal hole is opened on one side of the circular block 15. The other end of the screw 3 is rotatably connected to the first connecting frame 1.

[0031] Specifically, use a hex wrench inserted into the internal hexagonal hole on one side of the circular block 15 to drive the screw 3 to rotate through the circular block 15.

[0032] The implementation principle of this application is as follows:

[0033] The first connecting frame 1 and the second connecting frame 6 are welded to both ends of the duct instead of flanges. When connecting ducts, the second connecting frame 6 on one duct is aligned with the first connecting frame 1 on the other duct, so that the connecting pin 7 is inserted into the corresponding connecting hole on the first connecting frame 1. Then, a hex wrench is inserted into the internal hexagonal hole on one side of the circular block 15. The circular block 15 drives the screw 3 to rotate. The screw 3 drives the moving rod 5 to move away from the first connecting frame 1. The protective cover 8 moves together with the moving rod 4. The protective cover 8 drives the fixing block 9 to move together. The guide rod 10 moves along the guide groove 11, forcing the fixing block 9 to slide on the protective cover 8 and approach the connecting pin 7. The fixing block 9 falls into the limiting groove on the connecting pin 7. The moving rod 4 continues to move a distance. The fixing block 9 fixes the pair of connecting pins 7 by squeezing the inner wall of the limiting groove, so that the first connecting frame 1 and the second connecting frame 6 are connected together, realizing the rapid connection of ducts, greatly shortening the connection time, reducing the maintenance difficulty, and improving the efficiency of duct connection.

[0034] When the duct is connected, the U-shaped sealing block 13 on the second connecting frame 6 is inserted into the sealing groove 12 on the first connecting frame 1. The U-shaped sealing block 13 and the sealing groove 12 fit tightly together to form the first barrier. The second connecting frame 6 squeezes the sealing ring 14 on the first connecting frame 1 to form a second seal, reducing the risk of gas leakage.

[0035] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, all equivalent changes made to the structure, shape, and principle of this application should be covered within the scope of protection of this application.

Claims

1. A mechanical seal connection structure for air displacement pipelines in civil defense engineering, comprising a first connecting frame (1), characterized in that, A pair of fixing brackets (2) are fixedly connected to one side of the first connecting frame (1). Each fixing bracket (2) is rotatably connected to a screw (3). A moving rod (4) is threaded onto the screw (3). Fixing components are provided at both ends of the moving rod (4). Two pairs of guide blocks (5) are symmetrically arranged on one side of the first connecting frame (1). Two pairs of connecting holes are opened on the first connecting frame (1). A second connecting frame (6) is provided on the side of the first connecting frame (1) away from the guide blocks (5). Two pairs of connecting pins (7) are fixedly connected on the side of the second connecting frame (6) close to the first connecting frame (1). Each connecting pin (7) is adapted to the corresponding connecting hole.

2. The mechanical seal connection structure for air replacement pipelines in civil defense projects according to claim 1, characterized in that, The fixing component includes a protective cover (8), which is fixedly connected to one end of the moving rod (4). A fixing block (9) is slidably connected to the protective cover (8), and a guide rod (10) is fixedly connected to the bottom of the fixing block (9). A through movable groove is opened at the bottom of the protective cover (8), and the through movable groove is adapted to the guide rod (10).

3. The mechanical seal connection structure for air replacement pipelines in civil defense engineering according to claim 2, characterized in that, The guide block (5) is provided with a guide groove (11), which is adapted to the corresponding guide rod (10).

4. The mechanical seal connection structure for air replacement pipelines in civil defense projects according to claim 3, characterized in that, A limiting groove is provided on the connecting pin (7).

5. The mechanical seal connection structure for air replacement pipelines in civil defense projects according to claim 4, characterized in that, The first connecting frame (1) has a sealing groove (12) on the side away from the guide block (5), and the second connecting frame (6) has a spiral sealing block (13) fixedly connected on the side close to the first connecting frame (1). The spiral sealing block (13) is adapted to the sealing groove (12).

6. The mechanical seal connection structure for air displacement pipelines in civil defense engineering according to claim 5, characterized in that, The first connecting frame (1) has a receiving groove on the side away from the guide block (5), and a sealing ring (14) is provided in the receiving groove.

7. The mechanical seal connection structure for air displacement pipelines in civil defense engineering according to claim 6, characterized in that, One end of the screw (3) is coaxially fixedly connected to a circular block (15), and an internal hexagonal hole is opened on one side of the circular block (15). The other end of the screw (3) is rotatably connected to the first connecting frame (1).

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