Novel fire-resistant air pipe

Abstract

The utility model discloses a novel fire-resistant air pipe, and belongs to the technical field of air pipes. A novel fire-resistant air pipe comprises a first air pipe, a second air pipe is inserted into the first air pipe, an end shell is fixed to one end of the first air pipe, a rubber block is fixed to the inner side wall of the end shell in an attached mode, a cavity is formed in the rubber block, and an expansion adjusting assembly is arranged on the outer side wall of the end shell. When the extension length of the second air pipe in the first air pipe needs to be adjusted, expansion of the rubber block is relieved through the arranged expansion adjusting assembly, so that clamping of the rubber block to the second air pipe is relieved, the second air pipe can be pulled, and the extension length of the second air pipe in the first air pipe can be conveniently adjusted; the overall use length of the fire-resistant air pipe can be conveniently and telescopically adjusted according to the actual building internal installation space when the air pipe is installed, the fire-resistant air pipe is suitable for complex and diversified building internal installation spaces, and the overall practicability is effectively improved.

Description

Technical Field

[0001] This utility model belongs to the field of air duct technology, specifically relating to a new type of fire-resistant air duct. Background Technology

[0002] Air ducts are a core component of ventilation and air conditioning systems, primarily used for conveying, distributing, or exhausting air. They are widely used in construction, industry, medical, and transportation sectors. Depending on the material, air ducts can be categorized into galvanized steel, stainless steel, composite materials, and flexible ducts, each adaptable to different environmental requirements, such as corrosion resistance, high-temperature resistance, or lightweight installation. Fire-resistant ducts are made from various metal materials and possess properties such as non-combustibility and pressure resistance.

[0003] However, in the actual use of existing fire-resistant ducts, the production and usage length of the fire-resistant ducts is generally fixed. When installed inside a building, due to the complex and diverse installation space, it is impossible to adjust the installation and usage length of the fire-resistant duct according to the installation space, which is a shortcoming. The existing technology publication number: CN222746832U, a fire-resistant duct with a telescopic structure, raises the above-mentioned technical problems and provides a solution. This application provides a different solution.

[0004] Therefore, a new type of fire-resistant air duct is needed to solve the problems mentioned in the background section. Utility Model Content

[0005] The purpose of this invention is to provide a novel fire-resistant air duct to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A novel fire-resistant air duct includes a first air duct, a second air duct inserted inside the first air duct, an end shell fixed at one end of the first air duct, a rubber block attached to the inner side wall of the end shell, a cavity inside the rubber block, and an expansion adjustment component communicating with the cavity on the outer side wall of the end shell.

[0008] It should be noted in the solution that the expansion adjustment assembly includes an external seat fixed to the outer wall of the end shell. The external seat has an inner cavity, one end of which is open. A nut sleeve is fixed inside the open end of the inner cavity. A threaded rod inserted into the inner cavity is threadedly connected to the inside of the nut sleeve. A piston that fits tightly against the side wall of the inner cavity is fixed to one end of the threaded rod. A connecting pipe connects the inner cavity and the empty cavity.

[0009] It is worth noting that a rotating head plate is fixed to one end of the threaded rod located outside the inner cavity, and a rubber sleeve is fitted onto the surface of the rotating head plate.

[0010] Furthermore, it should be noted that the inner wall of the end shell is provided with multiple sets of symmetrically distributed roller assemblies. The roller assembly includes a support plate fixed to the inner wall of the end shell, and rollers are rotatably connected to the support plate.

[0011] Preferably, a protruding plate is fixed at the port of the second air duct, and a rubber sleeve is fitted onto the surface of the protruding plate.

[0012] Compared with the prior art, the novel fire-resistant air duct provided by this utility model has at least the following beneficial effects:

[0013] This invention utilizes an expansion-adjusting component to inject some liquid into the interior of a rubber block, causing the rubber block to expand elastically. The expanded rubber block then adheres tightly to the outer wall of the second duct, effectively sealing and clamping the second duct inserted into the first duct. This allows for rapid assembly of the first and second ducts. When adjustment of the second duct's extension length within the first duct is needed, the expansion-adjusting component releases the rubber block's expansion, releasing its clamping effect and allowing the second duct to be pulled. This facilitates easy adjustment of the second duct's extension length within the first duct, enabling flexible adjustment of the overall length of the fire-resistant duct according to the actual building's interior space during installation. This adaptability to complex and diverse building interior spaces effectively improves overall practicality. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of the present invention. Figure 1 ;

[0015] Figure 2 This is a schematic diagram of the overall structure of the present invention. Figure 2 ;

[0016] Figure 3 This is a cross-sectional view of the expansion adjustment component of this utility model;

[0017] Figure 4 for Figure 3 Enlarged structural diagram at point A in the middle;

[0018] Figure 5 This is a front view schematic diagram of the roller structure of this utility model.

[0019] In the picture:

[0020] 1. Expansion adjustment assembly; 101. External seat; 102. Inner cavity; 103. Threaded rod; 104. Nut sleeve; 105. Piston; 106. Connecting pipe; 107. Rotating head plate; 3. End shell; 4. First air duct; 5. Second air duct; 6. Protruding plate; 7. Rubber block; 8. Cavity; 9. Support plate; 10. Roller. Detailed Implementation

[0021] The present invention will be further described below with reference to the embodiments.

[0022] Please see Figure 1-5 This utility model provides a novel fire-resistant air duct, including a first air duct 4, a second air duct 5 inserted inside the first air duct 4, an end shell 3 fixed to one end of the first air duct 4, a rubber block 7 attached to the inner side wall of the end shell 3, a cavity 8 inside the rubber block 7, and an expansion adjusting component 1 communicating with the cavity 8 on the outer side wall of the end shell 3. During installation, the second air duct 5 is inserted into the first air duct 4, and the expansion adjusting component 1 forces some liquid into the rubber block 7, causing the rubber block 7 to elastically expand, thus allowing the expanded side wall of the rubber block 7 to tightly adhere to the outer side wall of the second air duct 5. The rubber block 7 seals and clamps the second air duct 5 inserted into the first air duct 4, enabling rapid assembly of the first air duct 4 and the second air duct 5. When it is necessary to adjust the extension length of the second air duct 5 inside the first air duct 4, the expansion adjustment component 1 releases the expansion of the rubber block 7, thereby releasing the clamping of the rubber block 7 on the second air duct 5. The second air duct 5 can then be pulled, making it easy to adjust the extension length of the second air duct 5 inside the first air duct 4. This allows for easy adjustment of the overall length of the fire-resistant air duct during installation according to the actual interior installation space of the building, adapting to complex and diverse interior installation spaces and effectively improving overall practicality.

[0023] Further as Figure 1 , Figure 3 and Figure 4As shown, it is worth noting that the expansion regulating assembly 1 includes an external seat 101 fixed to the outer wall of the end housing 3. The external seat 101 has an inner cavity 102, one end of which is open. A nut sleeve 104 is fixed inside the open end of the inner cavity 102. A threaded rod 103 inserted into the inner cavity 102 is threadedly connected to the nut sleeve 104. A piston 105, which fits tightly against the side wall of the inner cavity 102, is fixed to one end of the threaded rod 103. A connecting pipe 106 connects the inner cavity 102 and the cavity 8. During installation, the second air duct 5 is inserted into the first air duct 4. The inner cavity 102 is filled with a certain amount of liquid. By rotating the threaded rod 103, the threaded rod 103 drives the piston 105 to move within the inner cavity 102, thereby conveying a portion of the liquid within the inner cavity 102 through the connecting pipe 106 via the piston 105. The rubber block 7 is inserted into the interior of the first duct 4, causing it to expand elastically. The expanded sidewall of the rubber block 7 then adheres tightly to the outer wall of the second duct 5, thus sealing and clamping the second duct 5. This allows for the rapid assembly of the first and second ducts. When it is necessary to adjust the extension length of the second duct 5 within the first duct 4, the threaded rod 103 is rotated in the opposite direction, causing the piston 105 to move in the reverse direction within the inner cavity 102. This releases the expansion clamping of the rubber block 7 onto the second duct 5, allowing the second duct 5 to be pulled. This facilitates easy adjustment of the extension length of the second duct 5 within the first duct 4, enabling the overall length of the fire-resistant duct to be adjusted according to the actual interior space of the building during installation. This adapts to complex and diverse interior spaces, effectively improving overall practicality.

[0024] Further as Figure 4 As shown, it is worth noting that a rotating head plate 107 is fixed on one end of the threaded rod 103 located outside the inner cavity 102, and a rubber sleeve is fitted on the surface of the rotating head plate 107. In actual operation, the threaded rod 103 is rotated by rotating the rotating head plate 107, which facilitates operation. The rubber sleeve increases the friction when holding the rotating head plate 107 and prevents slippage.

[0025] Further as Figure 1 and Figure 5 As shown, it is worth noting that multiple sets of symmetrically distributed roller assemblies are provided on the inner wall of the end shell 3. The roller assembly includes a support plate 9 fixed to the inner wall of the end shell 3, and rollers 10 are rotatably connected to the support plate 9. In actual operation, the movement of the second air duct 5 is guided by the multiple symmetrically distributed rollers 10, which effectively reduces the offset of the second air duct 5 when it moves in the first air duct 4, effectively improves the smoothness and accuracy of adjusting the second air duct 5, and facilitates the adjustment of the extension and retraction of the second air duct 5.

[0026] This solution includes the following working process: During installation, the second air duct 5 is inserted into the first air duct 4. Rotating the rotating head plate 107 drives the threaded rod 103 to rotate. Rotating the threaded rod 103 causes the piston 105 to move within the inner cavity 102. The piston 105 then pumps some of the liquid from the inner cavity 102 through the connecting pipe 106 into the rubber block 7, causing the rubber block 7 to expand elastically. The expanded sidewall of the rubber block 7 then adheres tightly to the outer sidewall of the second air duct 5, thus sealing and clamping the second air duct 5 inserted into the first air duct 4, completing the installation of the first air duct 4 and the second air duct 5. The rapid assembly allows for easy adjustment of the extension length of the second duct 5 within the first duct 4. By reversing the threaded rod 103, the piston 105 moves in the reverse direction within the inner cavity 102, releasing the expansion clamp of the rubber block 7 on the second duct 5. This allows the second duct 5 to be pulled, facilitating the adjustment of its extension length within the first duct 4. This makes it convenient to adjust the overall length of the fire-resistant duct according to the actual installation space within the building during duct installation. Multiple symmetrically distributed rollers 10 guide the movement of the second duct 5, effectively reducing its offset during movement within the first duct 4 and facilitating the adjustment of its extension and retraction.

[0027] Further as Figure 2 As shown, it is worth noting that a protruding plate 6 is fixed at the end of the second air duct 5, and a rubber sleeve is fitted on the surface of the protruding plate 6; in actual operation, the second air duct 5 can be easily pulled by the protruding plate 6.

[0028] In summary: When it is necessary to adjust the extension length of the second duct 5 inside the first duct 4, the expansion adjustment component 1 releases the expansion of the rubber block 7, thereby releasing the clamping of the rubber block 7 on the second duct 5. The second duct 5 can then be pulled, making it easy to adjust the extension length of the second duct 5 inside the first duct 4. This facilitates the adjustment of the overall length of the fire-resistant duct according to the actual installation space inside the building during duct installation, adapting to complex and diverse building installation spaces and effectively improving overall practicality. The multiple symmetrically distributed rollers 10 guide the movement of the second duct 5, effectively reducing the offset of the second duct 5 when moving inside the first duct 4, effectively improving the smoothness and accuracy of pulling the second duct 5 for adjustment, and facilitating the adjustment of the extension and retraction of the second duct 5.

Claims

1. A novel fire-resistant air duct, comprising a first air duct (4), characterized in that, A second air duct (5) is inserted inside the first air duct (4). An end shell (3) is fixed at one end of the first air duct (4). A rubber block (7) is attached to the inner side wall of the end shell (3). A cavity (8) is opened inside the rubber block (7). An expansion adjustment component (1) communicating with the cavity (8) is provided on the outer side wall of the end shell (3).

2. The novel fire-resistant air duct according to claim 1, characterized in that, The expansion adjustment assembly (1) includes an external seat (101) fixed on the outer side wall of the end shell (3). The external seat (101) has an inner cavity (102) inside. One end of the inner cavity (102) is open. A nut sleeve (104) is fixed inside the open end of the inner cavity (102). A threaded rod (103) inserted into the inner cavity (102) is threaded inside the nut sleeve (104). A piston (105) is fixed on one end of the threaded rod (103) and fits tightly against the side wall of the inner cavity (102). A connecting pipe (106) connects the inner cavity (102) and the cavity (8).

3. A novel fire-resistant air duct according to claim 2, characterized in that, The threaded rod (103) has a rotating head plate (107) fixed on one end outside the inner cavity (102), and a rubber sleeve is fitted on the surface of the rotating head plate (107).

4. A novel fire-resistant air duct according to claim 1, characterized in that, Multiple sets of symmetrically distributed roller assemblies are provided on the inner sidewall of the end shell (3). The roller assembly includes a support plate (9) fixed on the inner sidewall of the end shell (3), and a roller (10) is rotatably connected to the support plate (9).

5. A novel fire-resistant air duct according to claim 4, characterized in that, A protruding plate (6) is fixed at the port of the second air duct (5), and a rubber sleeve is fitted on the surface of the protruding plate (6).

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