Spiral duct convenient to install

Abstract

The utility model discloses a spiral duct convenient to install, which relates to the technical field of ventilation duct connection and comprises a spiral duct body, and an internal connection structure and an external connection structure are respectively arranged at two ends of the spiral duct body. The internal connection structure comprises a limiting rod and an arc-shaped sealing strip, the external connection structure is provided with a limiting groove and a wedging groove which are matched, and rapid butt joint is achieved through a hasp structure. The sealing structure comprises an air guide ring, an annular air bag and a one-way valve, and the contact pressure between the sealing ring and the narrow face end is dynamically controlled by adjusting the air pressure of the air bag to adapt to environment temperature changes. By means of the design, the problems that a traditional air pipe is complex in installation and nonadjustable in sealing are solved, and the advantages of efficient butt joint, double sealing and pressure self-adaption are achieved.

Description

Technical Field

[0001] This utility model relates to the field of ventilation duct connection technology, and more specifically, to a spiral duct that is easy to install. Background Technology

[0002] Traditional spiral ducts often use flange connections or simple snap-fit ​​structures, requiring manual alignment and tightening of bolt holes during installation, which is time-consuming and labor-intensive. Sealing mainly relies on rubber gaskets or tape wrapping, which are prone to leakage due to material aging or temperature deformation over long-term use. While some snap-fit ​​ducts simplify installation, their sealing performance is insufficient, and they cannot adjust the sealing pressure according to environmental changes (such as thermal expansion and contraction), posing safety hazards.

[0003] Existing spiral ducts have the following defects:

[0004] Low installation efficiency: Flange connections rely on manual hole alignment and tightening, which is cumbersome; ordinary snap-fit ​​structures lack positioning accuracy and are prone to misalignment.

[0005] Non-adjustable seal: Fixed gaskets are prone to failure under temperature differences or vibrations, lacking a dynamic adjustment mechanism, leading to air leakage or damage from excessive compression.

[0006] High maintenance costs: The seals need to be replaced as a whole after they age, and their service life cannot be extended by local adjustments.

[0007] No effective solutions have yet been proposed to address the problems in the relevant technologies. Utility Model Content

[0008] In view of the problems in the related technologies, this utility model proposes a spiral duct that is easy to install, so as to overcome the above-mentioned technical problems existing in the existing related technologies.

[0009] Therefore, the specific technical solution adopted by this utility model is as follows:

[0010] An easy-to-install spiral duct includes a spiral duct with an inner connection structure and an outer connection structure at both ends. The outer connection structure is connected to a snap fastener structure, and the inner connection structure is provided with a sealing structure. The inner connection structure and the outer connection structure can be quickly connected through the snap fastener structure. The sealing structure improves the sealing performance between the inner connection structure and the outer connection structure, and the sealing effect of the sealing structure is adjustable.

[0011] Furthermore, the inner connection structure includes an inner sleeve, a limiting rod, and a sealing strip. The inner sleeve is installed at one end of the spiral duct, and the outer ring of the inner sleeve is fixedly provided with a limiting rod. An arc-shaped sealing strip is connected between the limiting rods, and the sealing strip is fixedly adhered to the outer ring surface of the inner sleeve.

[0012] Furthermore, the external structure includes an external sleeve, a limiting groove, a fitting groove, a narrow end, and a mating end. The inner ring of the external sleeve has a limiting groove, and similarly, the inner ring of the external sleeve has a fitting groove between the limiting grooves. The limiting groove and the fitting groove respectively fit with the limiting rod and the sealing strip. One end of the external sleeve is the narrow end, and the other end of the external sleeve is the mating end. The external sleeve is fixedly installed on the spiral duct at the other end of the internal structure through the mating end.

[0013] Furthermore, the fastening structure includes a butt buckle and a butt hook. The butt buckle is installed on the spiral duct near the end of the inner connection structure, and the butt hook is installed on the outer ring surface of the outer sleeve of the outer connection structure.

[0014] Furthermore, the sealing structure includes an air guide ring, an annular airbag, a one-way valve, and a sealing ring. The top of the air guide ring is sealed with an annular airbag, the interior of the annular airbag is connected to the internal air groove of the air guide ring, a one-way valve is provided on one side of the air guide ring, and a sealing ring is provided at the top of the annular airbag. The sealing ring is fixedly installed on the narrow end surface of the external structure.

[0015] The beneficial effects of this utility model are as follows: the inner and outer structures are precisely positioned by the limiting rod and the limiting groove, and the eight sets of hooks and latches of the snap-fit ​​structure are quickly locked without tools, improving installation efficiency; the sealing strip is embedded in the fitting groove to form a rigid sealing layer, and the annular airbag and the sealing ring at the narrow end are in flexible contact, adapting to different working conditions through air pressure adjustment; the air pressure in the air guide ring is adjusted by the external air pump connected to the one-way valve to control the degree of airbag expansion, reducing the air pressure at high temperatures to prevent tearing, and increasing the pressure at low temperatures to prevent air leakage; the adjustable sealing pressure can cope with thermal expansion and contraction and vibration, extending the life of the sealing structure and reducing the frequency of maintenance. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the main structure of a spiral duct that is easy to install, according to an embodiment of the present utility model.

[0018] Figure 2 This is a schematic diagram of a snap-fit ​​structure for an easy-to-install spiral duct according to an embodiment of the present utility model;

[0019] Figure 3 This is a schematic diagram of the external connection structure of a spiral duct that is easy to install, according to an embodiment of the present utility model.

[0020] Figure 4This is a schematic diagram of a sealing structure for an easy-to-install spiral duct according to an embodiment of the present utility model.

[0021] In the picture:

[0022] 1. Spiral duct; 2. Internal structure; 201. Internal sleeve; 202. Limiting rod; 203. Sealing strip; 3. External structure; 301. External sleeve; 302. Limiting groove; 303. Fitting groove; 304. Narrow end; 305. Butt joint end; 4. Fastener structure; 401. Butt joint fastener; 402. Butt joint hook; 5. Sealing structure; 501. Air guide ring; 502. Annular airbag; 503. One-way valve; 504. Sealing ring. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] According to an embodiment of the present invention, an easy-to-install spiral duct is provided.

[0025] Example 1;

[0026] like Figure 1-4 As shown, the easy-to-install spiral duct according to an embodiment of the present invention includes a spiral duct 1. The spiral duct 1 has an inner connection structure 2 and an outer connection structure 3 at both ends. A snap-fit ​​structure 4 is connected to the outer connection structure 3, and a sealing structure 5 is provided on the inner connection structure 2. The inner connection structure 2 and the outer connection structure 3 can be quickly connected via the snap-fit ​​structure 4. The sealing structure 5 improves the sealing performance between the inner connection structure 2 and the outer connection structure 3, and the sealing effect of the sealing structure 5 is adjustable. One end of the spiral duct 1 is connected to the inner connection structure 2, and the other end is connected to the outer connection structure 3. When two spiral ducts 1 are installed together, the connection is completed by the mutual connection of the inner connection structure 2 and the outer connection structure 3. The operation is convenient and quick. Simultaneously, the snap-fit ​​structure 4 allows for easy fixing, and the sealing structure 5 improves the sealing performance while allowing for adjustment of the sealing performance according to actual conditions.

[0027] The inner structure 2 includes an inner sleeve 201, a limiting rod 202, and a sealing strip 203. The inner sleeve 201 is installed at one end of the spiral duct 1. The limiting rod 202 is fixedly provided on the outer ring of the inner sleeve 201. An arc-shaped sealing strip 203 is connected between the limiting rods 202. The sealing strip 203 is fixedly bonded to the outer ring surface of the inner sleeve 201. The outer structure 3 includes an outer sleeve 301, a limiting groove 302, a fitting groove 303, a narrow end 304, and a mating end 305. The inner ring of the outer sleeve 301 has a limiting groove 302. Similarly, on the inner ring of the outer sleeve 301, a fitting groove 303 is provided between the limiting grooves 302. The limiting groove 302 and the fitting groove 303 are respectively connected to the limiting rod 202 and the fitting rod 203. The sealing strip 203 fits together. One end of the outer sleeve 301 is the narrow end 304, and the other end of the outer sleeve 301 is the mating end 305. The outer sleeve 301 is fixedly installed on the spiral duct 1 at the other end of the inner structure 2 through the mating end 305. When the inner structure 2 and the outer structure 3 are mated, the limiting groove 302 of the outer sleeve 301 is positioned and mated with the inner sleeve 201 through the mating limiting rod 202. After the outer sleeve 301 and the inner sleeve 201 are mated in place, the mating groove 303 fits the sealing strip 203 to complete the first seal. The sealing ring 504 of the narrow end 304 of the outer sleeve 301 will contact the annular airbag 502 on the inner sleeve 201 to complete the second seal.

[0028] The fastening structure 4 includes a docking buckle 401 and a docking hook 402. The docking buckle 401 is installed on the spiral duct 1 near the end of the inner connection structure 2, and the docking hook 402 is installed on the outer ring surface of the outer sleeve 301 of the outer connection structure 3. After the outer sleeve 301 and the inner sleeve 201 are docked in place, the docking buckle 401 uses the handle provided on it to make its buckle ring engage with the docking buckle 401, thereby completing the initial duct connection. The fastening structure 4 has eight sets.

[0029] The sealing structure 5 includes a guide ring 501, an annular airbag 502, a one-way valve 503, and a sealing ring 504. The top of the guide ring 501 is sealed to the annular airbag 502, and the interior of the annular airbag 502 communicates with the internal air groove of the guide ring 501. A one-way valve 503 is provided on one side of the guide ring 501, and a sealing ring 504 is provided at the top of the annular airbag 502. The sealing ring 504 is fixedly installed on the surface of the narrow end 304 of the external structure 3. The air pressure inside the guide ring 501 can be controlled by the one-way valve. 503 is adjusted by connecting a one-way valve 503 to an external air pressure device, which can then be used to inflate or deflate the air inside the air guide ring 501, thereby changing the contact pressure between the annular air bag 502 and the sealing ring 504, and thus changing the sealing effect. For example, when the ambient temperature is about to change significantly, the air pressure of the air guide ring 501 can be adjusted manually by connecting the air pressure device to prevent excessive pressure between the annular air bag 502 and the sealing ring 504, which could cause crushing damage, or insufficient contact pressure, which could cause leakage.

[0030] To facilitate understanding of the above-mentioned technical solutions of this utility model, the working principle or operation method of this utility model in actual process will be described in detail below.

[0031] In summary, with the help of the above-mentioned technical solution of this utility model, when two spiral ducts 1 are installed together, the connection of the two ducts is completed by the mutual connection of the inner structure 2 and the outer structure 3, which is convenient and quick. At the same time, the fastener structure 4 can be conveniently fixed, and the sealing structure 5 can improve the sealing performance while allowing for adjustment of the sealing performance according to the actual situation. When the inner structure 2 and the outer structure 3 are connected, the limiting groove 302 of the outer sleeve 301 is positioned and connected with the inner sleeve 201 through the matching limiting rod 202. After the outer sleeve 301 and the inner sleeve 201 are in place, the matching groove 303 matches the sealing strip 203, completing the first seal. The sealing ring 504 at the narrow end 304 of 301 will contact the annular airbag 502 on the inner sleeve 201 to form a second seal. The air pressure inside the air guide ring 501 can be adjusted by the one-way valve 503. The one-way valve 503 is connected to an external air pressure device, which can then be used to inflate or deflate the air inside the air guide ring 501, thereby changing the contact pressure between the annular airbag 502 and the sealing ring 504, and thus changing the sealing effect. For example, when the ambient temperature is about to change significantly, the air pressure of the air guide ring 501 can be adjusted manually by connecting an air pressure device to prevent excessive contact pressure between the annular airbag 502 and the sealing ring 504, which could cause crushing damage, or insufficient contact pressure, which could cause leakage.

[0032] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A spiral duct that is easy to install, characterized in that, The spiral duct (1) includes an inner structure (2) and an outer structure (3) at both ends. The outer structure (3) is connected to a snap fastener (4), and the inner structure (2) is provided with a sealing structure (5). The inner structure (2) and the outer structure (3) can be quickly connected through the snap fastener (4). The sealing structure (5) improves the sealing between the inner structure (2) and the outer structure (3). The sealing effect of the sealing structure (5) is adjustable.

2. The spiral duct for easy installation according to claim 1, characterized in that, The inner connection structure (2) includes an inner sleeve (201), a limiting rod (202), and a sealing strip (203). The inner sleeve (201) is installed at one end of the spiral duct (1). The outer ring of the inner sleeve (201) is fixedly provided with a limiting rod (202). An arc-shaped sealing strip (203) is connected between the limiting rods (202). The sealing strip (203) is fixedly bonded to the outer ring surface of the inner sleeve (201).

3. The spiral duct for easy installation according to claim 2, characterized in that, The external structure (3) includes an external sleeve (301), a limiting groove (302), a fitting groove (303), a narrow end (304), and a mating end (305). The inner ring of the external sleeve (301) has a limiting groove (302). Similarly, the inner ring of the external sleeve (301) has a fitting groove (303) between the limiting groove (302). The limiting groove (302) and the fitting groove (303) respectively fit with the limiting rod (202) and the sealing strip (203).

4. The spiral duct for easy installation according to claim 3, characterized in that, One end of the outer sleeve (301) is the narrow end (304), and the other end of the outer sleeve (301) is the mating end (305). The outer sleeve (301) is fixedly installed on the spiral duct (1) at the other end of the inner structure (2) through the mating end (305).

5. The spiral duct for easy installation according to claim 4, characterized in that, The snap-fit ​​structure (4) includes a snap fastener (401) and a hook (402). The snap fastener (401) is installed on the spiral duct (1) near one end of the inner structure (2), and the hook (402) is installed on the outer ring surface of the outer sleeve (301) of the outer structure (3).

6. The spiral duct for easy installation according to claim 5, characterized in that, The sealing structure (5) includes an air guide ring (501), an annular airbag (502), a one-way valve (503), and a sealing ring (504). The top of the air guide ring (501) is sealed with the annular airbag (502), and the interior of the annular airbag (502) is connected to the internal air groove of the air guide ring (501).

7. The spiral duct for easy installation according to claim 6, characterized in that, A one-way valve (503) is provided on one side of the air guide ring (501), and a sealing ring (504) is provided at the top of the annular airbag (502). The sealing ring (504) is fixedly installed on the surface of the narrow end (304) of the external structure (3).

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