Flexible connection structure of air pipe

Abstract

The utility model relates to the field of air pipes, in particular to an air pipe flexible connection structure which comprises a main flexible connection air pipe, an air pipe body used for flexible connection, and a first inner connection ring arranged in the main flexible connection air pipe and used for enhancing the stability of air pipe connection. The air pipe flexible connection structure is provided with the first inner connection ring, the first threaded pipe, the inner connection hose, the second threaded pipe, the auxiliary flexible connection air pipe, the first flange plate and the second flange plate, and when the air pipe flexible connection structure is used, the inner connection hose can be installed in the main flexible connection air pipe and the auxiliary flexible connection air pipe through the threaded grooves to add flexible connection in the main flexible connection air pipe and the auxiliary flexible connection air pipe; and then, the joint of the main flexible connection air pipe and the auxiliary flexible connection air pipe is sleeved with the outer attaching sealing soft sleeve through the embedded groove of the first flange plate, so that after the air pipe flexible connection is formed, the inner connection hose and the outer attaching sealing soft sleeve are attached to the joint inside and outside, and the sealing performance of the air pipe flexible connection is enhanced.

Description

Technical Field

[0001] The utility model relates to the field of air ducts, and particularly to a flexible connection structure for air ducts. Background Art

[0002] An air duct is a pipe system used to transport air and air mixtures, and is widely used in multiple fields such as central air-conditioning systems, industrial ventilation, air purification, and environmental control. The flexible connection structure of the air duct is one of the many connection structures of the air duct. The structural design of the flexible connection of the air duct aims to achieve flexible connection between air duct systems to adapt to various displacement, expansion, and vibration requirements. The flexible connection of the air duct is widely used in various fields such as fire smoke exhaust, chemical flue, cement dust removal, printing and coating, environmental protection ventilation, and aerospace. The connection requirements for the air duct systems in these fields are different, but the flexible connection can provide flexible and reliable solutions.

[0003] During the use of the existing flexible connection structure of the air duct, due to the different application ranges and environments of the air duct, when making a flexible connection only by externally sleeving a hose, there is not only a lack of tightness at the connection, which easily causes leakage and other situations in the flexible connection structure, but also only relying on the hose sleeving, when the air duct performs various displacements, bends, etc., the strength and stability of the flexible connection cannot be guaranteed, thus affecting the normal use of the subsequent air duct.

[0004] Therefore, it is very necessary to invent a flexible connection structure for air ducts to solve the above problems. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a flexible connection structure for air ducts, which strengthens the tightness at the flexible connection of the air duct through the first inner connection ring, the first threaded pipe, the inner connection hose, the second threaded pipe, the auxiliary flexible connection air duct, the first flange and the second flange, reduces the probability of leakage caused by the flexible movement of the flexible connection, and at the same time, externally connecting the first flange and the second flange through fixing bolts strengthens the strength and stability of the flexible connection when the air duct performs various displacements, bends, etc., and ensures the normal use effect of the subsequent air duct, so as to solve the problems in the prior art that during the use of the flexible connection structure of the air duct, due to the different application ranges and environments of the air duct, when making a flexible connection only by externally sleeving a hose, there is not only a lack of tightness at the connection, which easily causes leakage and other situations in the flexible connection structure, but also only relying on the hose sleeving, when the air duct performs various displacements, bends, etc., the strength and stability of the flexible connection cannot be guaranteed, thus affecting the normal use of the subsequent air duct.

[0006] To achieve the above purpose, the utility model provides the following technical solution: a flexible connection structure for air ducts, including a main flexible connection air duct, which is the air duct body for making flexible connection;

[0007] The first inner connecting ring is arranged inside the main flexible connecting air duct and is used to strengthen the stability of the air duct connection. A threaded groove is opened inside the first inner connecting ring, and a first threaded pipe is movably connected inside the threaded groove. One end of the first threaded pipe is fixedly installed with an inner connecting hose, and a high-temperature and corrosion-resistant protective layer is pasted inside the inner connecting hose. The other end of the inner connecting hose is fixedly installed with a second threaded pipe, and the outside of the second threaded pipe is movably connected with a second inner connecting ring;

[0008] The auxiliary flexible connecting air duct is arranged outside the second inner connecting ring and is used for flexible connection with the main flexible connecting air duct. A first flange is fixedly installed outside the main flexible connecting air duct, an embedded groove is opened inside the first flange, an outer fitting sealing soft sleeve is movably connected inside the embedded groove, and a second flange is arranged on one side of the outer fitting sealing soft sleeve;

[0009] The fixing bolts penetrate through the outside of the second flange and are used for connecting and installing the first flange. A hexagonal nut is movably connected to the outside of the fixing bolts, and a fixing bar is fixedly installed at one end of the fixing bolts.

[0010] Preferably, the inner connecting hose is movably connected with the main flexible connecting air duct, and the first inner connecting ring is fixedly connected with the main flexible connecting air duct.

[0011] Preferably, the inner connecting hose is closely attached to the high-temperature and corrosion-resistant protective layer, and the material of the high-temperature and corrosion-resistant protective layer is: polyamide.

[0012] Preferably, the outer fitting sealing soft sleeve is movably connected with the auxiliary flexible connecting air duct, and the second flange is fixedly connected with the auxiliary flexible connecting air duct.

[0013] Preferably, a torsion spring is fixedly installed at one end of the fixing bar, and a bar bolt is fixedly installed at the other end of the torsion spring.

[0014] Preferably, the number of the bar bolts is set to be multiple, and the multiple bar bolts are annularly and arrayedly distributed on the first flange

[0015] In the above technical solution, the technical effects and advantages provided by the present utility model are:

[0016] The utility model is provided with a first inner connecting ring, a first threaded tube, an inner connecting hose, a second threaded tube, an auxiliary flexible connecting air duct, a first flange and a second flange. When the flexible connecting structure of the air duct is used, the inner connecting hose can be installed inside the main flexible connecting air duct and the auxiliary flexible connecting air duct through the threaded groove to increase the flexible connection inside, and then an outer fitting sealing soft sleeve is arranged outside the connection between the main flexible connecting air duct and the auxiliary flexible connecting air duct through the embedded groove of the first flange. In this way, after the flexible connection of the air duct is formed, the inner connecting hose and the outer fitting sealing soft sleeve are fitted inside and outside at the connection, thereby strengthening the sealing of the flexible connection of the air duct and reducing the probability of leakage caused by the flexible movement of the flexible connection. At the same time, the first flange and the second flange are connected by fixing bolts on the outside to strengthen the strength and stability of the flexible connection when the air duct is subjected to various displacement, bending and other operations, thereby ensuring the normal use of the subsequent air duct.

[0017] The utility model is provided with an internal connecting hose, a high-temperature resistant and corrosion-resistant protective layer, a fixing bolt, a hexagonal nut, a fixing pull rod, a torsion spring and a pull rod bolt. When the air duct flexible connection structure is used, the high-temperature resistant and corrosion-resistant protective layer bonded to the inside of the internal connecting hose enhances the high-temperature resistance and corrosion resistance of the flexible connection structure itself. In this way, when the air duct is used in different occasions, the corrosion of the air duct flexible connection structure caused by the circulation of the internal medium is reduced, thereby extending the service life of the air duct flexible connection structure. At the same time, since the fixing pull rod and the pull rod bolt are connected by a torsion spring in the middle of the fixing bolts connecting the first flange and the second flange, when the air duct flexible connection structure is bent or the like, the torsion spring can also bend accordingly, without affecting the normal use of the air duct flexible connection structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2 This is a schematic diagram of the internal connection hose structure of the utility model;

[0021] Figure 3 This is a schematic diagram of the auxiliary flexible connection air duct structure of the utility model;

[0022] Figure 4 This is a schematic diagram of the structure of the externally fitted sealing soft sleeve of the utility model;

[0023] Figure 5Schematic diagram of the torsion spring structure of the present utility model.

[0024] Description of the reference numerals:

[0025] 1. Main flexible connection air duct; 2. First inner connection ring; 3. Thread groove; 4. First threaded pipe; 5. Inner connection hose; 6. High-temperature and corrosion-resistant protective layer; 7. Second threaded pipe; 8. Second inner connection ring; 9. Sub-flexible connection air duct; 10. First flange; 11. Embedded groove; 12. Outer fitting sealing soft sleeve; 13. Second flange; 14. Fixed bolt; 15. Hexagonal nut; 16. Fixed tension bar; 17. Torsion spring; 18. Tension bar bolt. Specific implementation manner

[0026] In order to enable those skilled in the art to better understand the technical solution of the present utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0027] The present utility model provides a Figures 1-5 flexible connection structure of an air duct as shown, including a main flexible connection air duct 1, which is the air duct main body for flexible connection;

[0028] A first inner connection ring 2 is arranged inside the main flexible connection air duct 1 for enhancing the stability of the air duct connection. A thread groove 3 is provided inside the first inner connection ring 2, and a first threaded pipe 4 is movably connected inside the thread groove 3. One end of the first threaded pipe 4 is fixedly installed with an inner connection hose 5, and a high-temperature and corrosion-resistant protective layer 6 is pasted inside the inner connection hose 5. The other end of the inner connection hose 5 is fixedly installed with a second threaded pipe 7, and the outside of the second threaded pipe 7 is movably connected with a second inner connection ring 8;

[0029] A sub-flexible connection air duct 9 is arranged outside the second inner connection ring 8 for flexible connection with the main flexible connection air duct 1. A first flange 10 is fixedly installed outside the main flexible connection air duct 1. An embedded groove 11 is provided inside the first flange 10, and an outer fitting sealing soft sleeve 12 is movably connected inside the embedded groove 11. A second flange 13 is arranged on one side of the outer fitting sealing soft sleeve 12;

[0030] A fixed bolt 14 passes through the outside of the second flange 13 for connecting and installing the first flange 10. A hexagonal nut 15 is movably connected to the outside of the fixed bolt 14. One end of the fixed bolt 14 is fixedly installed with a fixed tension bar 16. Connecting the first flange 10 and the second flange 13 through the fixed bolt 14 strengthens the strength and stability of the flexible connection when the air duct undergoes various displacements, bends, etc., ensuring the normal use of the subsequent air duct.

[0031] As Figure 1 , Figure 2 and Figure 3As shown, the inner connecting hose 5 is movably connected to the main soft-connected air duct 1, and the first inner connecting ring 2 is fixedly connected to the main soft-connected air duct 1. The inner connecting hose 5 can be installed inside the main soft-connected air duct 1 and the auxiliary soft-connected air duct 9 through the threaded groove 3 to increase the soft connection inside. The inner connecting hose 5 is tightly fitted with the high-temperature resistant and corrosion-resistant protective layer 6. The material of the high-temperature resistant and corrosion-resistant protective layer 6 is polyamide. The high-temperature resistant and corrosion-resistant protective layer 6 fitted inside the inner connecting hose 5 enhances the high-temperature resistance and corrosion resistance of the soft connection structure itself. In this way, when the air duct is used in different occasions, the corrosion of the air duct soft connection structure caused by the circulation of the internal medium is reduced, thereby extending the service life of the air duct soft connection structure.

[0032] like Figure 1 , Figure 4 and Figure 5 As shown, the outer fitting sealing soft sleeve 12 is movably connected to the auxiliary soft connection air duct 9, and the second flange 13 is fixedly connected to the auxiliary soft connection air duct 9. The outer fitting sealing soft sleeve 12 is arranged on the outer surface of the connection between the main soft connection air duct 1 and the auxiliary soft connection air duct 9 through the embedded groove 11 of the first flange 10. In this way, after the air duct is softly connected, the inner connecting hose 5 and the outer fitting sealing soft sleeve 12 are fitted at the connection, one inside and one outside, to enhance the sealing of the air duct soft connection. A torsion spring 17 is fixedly installed at one end of the fixed pull rod 16, and a pull rod bolt 18 is fixedly installed at the other end of the torsion spring 17. Since the fixing bolts 14 connecting the first flange 10 and the second flange 13 are connected by the torsion spring 17 in the middle, the fixing rod 16 and the rod bolt 18 can be allowed to bend smoothly when the flexible connection structure of the air duct is bent, etc., without affecting the normal use of the flexible connection structure of the air duct. The number of the rod bolts 18 is set to be multiple, and the multiple rod bolts 18 are distributed in a circular array on the first flange 10. The rod bolts 18 have a simple structure and are easy to operate. If a fault occurs, it is convenient for maintenance personnel to replace and repair them in time without delaying the normal use of the device.

[0033] The working principle of this utility model: First, take out the main flexible connecting air duct 1 that needs to be connected and installed. Inside the main flexible connecting air duct 1 and the auxiliary flexible connecting air duct 9, an inner connecting hose 5 can be installed through the threaded groove 3 to add flexible connection inside. Then, an outer fitting sealing soft sleeve 12 is sleeved outside the connection between the main flexible connecting air duct 1 and the auxiliary flexible connecting air duct 9 through the embedded groove 11 of the first flange 10. In this way, after the air duct is flexibly connected, the inner connecting hose 5 and the outer fitting sealing soft sleeve 12 are fitted inside and outside at the connection, strengthening the sealing performance of the flexible connection of the air duct. Then, hold the fixing bolt 14 and the tension rod bolt 18 externally and press the torsion spring 17 towards the middle. Pass the fixing bolt 14 through the second flange 13, and the tension rod bolt 18 passes through the first flange 10. Then tighten the hexagon nut 15, thus completing the task of connecting the first flange 10 and the second flange 13, strengthening the strength and stability of the flexible connection when the air duct undergoes various displacements, bends and other operations. After the installation is completed, when the air duct is in normal use, the high-temperature resistant and corrosion-resistant protective layer 6 fitted inside the inner connecting hose 5 enhances the high-temperature resistance and corrosion resistance of the flexible connection structure itself, reducing the corrosion caused by the internal medium flow to the flexible connection structure of the air duct, thereby extending the service life of the flexible connection structure of the air duct. Then, since the fixing bolt 14 connecting the first flange 10 and the second flange 13 is connected to the fixing bar 16 and the tension rod bolt 18 through the torsion spring 17 in the middle, when the flexible connection structure of the air duct undergoes operations such as bending, the torsion spring 17 can also bend accordingly without affecting the normal use of the flexible connection structure of the air duct. Finally, after completing all the installation and use work of the flexible connection structure of the air duct according to the above operations, only daily maintenance of the air duct is required. The material of the high-temperature resistant and corrosion-resistant protective layer 6 is: polyamide. In this way, the use process of the flexible connection structure of the air duct is completed.

[0034] Only some exemplary embodiments of the present utility model have been described by way of illustration above. Without doubt, for those of ordinary skill in the art, the described embodiments can be modified in various different ways without departing from the spirit and scope of the present utility model. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the protection scope of the claims of the present utility model.

Claims

1. An air duct flexible connection structure, characterized in that: including A main flexible connecting air duct (1), which is the main body of the air duct for flexible connection; A first inner connecting ring (2) is arranged inside the main flexible connecting air duct (1) to enhance the stability of the air duct connection. A threaded groove (3) is formed inside the first inner connecting ring (2). A first threaded pipe (4) is movably connected inside the threaded groove (3). One end of the first threaded pipe (4) is fixedly installed with an inner connecting hose (5). A high-temperature resistant and corrosion-resistant protective layer (6) is pasted inside the inner connecting hose (5). The other end of the inner connecting hose (5) is fixedly installed with a second threaded pipe (7). The outside of the second threaded pipe (7) is movably connected with a second inner connecting ring (8); A secondary flexible connecting air duct (9) is arranged outside the second inner connecting ring (8) for flexible connection with the main flexible connecting air duct (1). A first flange (10) is fixedly installed outside the main flexible connecting air duct (1). An embedded groove (11) is formed inside the first flange (10). An outer fitting sealing soft sleeve (12) is movably connected inside the embedded groove (11). A second flange (13) is arranged on one side of the outer fitting sealing soft sleeve (12); A fixing bolt (14) passes through the outside of the second flange (13) for connecting and installing the first flange (10). A hexagonal nut (15) is movably connected to the outside of the fixing bolt (14). One end of the fixing bolt (14) is fixedly installed with a fixing bar (16).

2. The flexible air duct connection structure according to claim 1, characterized in that: The inner connecting hose (5) is movably connected with the main flexible connecting air duct (1), and the first inner connecting ring (2) is fixedly connected with the main flexible connecting air duct (1).

3. The flexible air duct connection structure according to claim 1, characterized in that: The inner connecting hose (5) is closely attached to the high-temperature resistant and corrosion-resistant protective layer (6), and the material of the high-temperature resistant and corrosion-resistant protective layer (6) is: polyamide.

4. A flexible air duct connection structure according to claim 1, characterized in that: The outer fitting sealing soft sleeve (12) is movably connected with the secondary flexible connecting air duct (9), and the second flange (13) is fixedly connected with the secondary flexible connecting air duct (9).

5. A flexible air duct connection structure according to claim 1, characterized in that: One end of the fixing bar (16) is fixedly installed with a torsion spring (17), and the other end of the torsion spring (17) is fixedly installed with a bar bolt (18).

6. The flexible air duct connection structure according to claim 5, characterized in that: The number of the bar bolts (18) is set to be multiple, and the multiple bar bolts (18) are annularly and arrayedly distributed on the first flange (10).

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