Air return pipeline structure with adjustable inner supporting frame

Abstract

The utility model discloses a return air duct structure with an adjustable inner support frame, which comprises a plurality of return air duct units arranged in sequence, each return air duct unit comprises a rubber and plastic air duct body, a support frame and a hoisting component, and the corresponding ends of any two adjacent rubber and plastic air duct bodies are connected through an annular zipper. The supporting frame is arranged in the rubber and plastic air pipe body and comprises a plurality of square frame bodies which are sequentially arranged at equal intervals in the length direction of the rubber and plastic air pipe body, and every two adjacent square frame bodies are fixedly connected through a longitudinal connecting rod. The square frame body is formed by connecting two transverse rods and two telescopic vertical rods. The rubber and plastic air pipe body is provided with two hoisting assemblies and is installed and connected to the top of a building through the hoisting assemblies. The height of the supporting frame can be adjusted, the supporting frame can be easily installed in the rubber and plastic air pipe body, the rubber and plastic air pipe body is supported and keeps certain tension, installation is fast and labor-saving, and the hidden danger of pipeline damage in the installation process is eliminated.

Description

Technical Field

[0001] The utility model relates to the technical field of ventilation and air exchange, and in particular to a return air duct structure with an adjustable inner supporting frame. Background Art

[0002] The rubber-plastic composite duct is a new generation of energy-saving and environmentally friendly duct that can replace iron ducts and glass fiber ducts. The product is composed of two layers of high-strength inorganic materials and one layer of thermal insulation material as the base material, and is combined with adhesive technology. It has excellent thermal insulation and fireproof performance. The rubber-plastic composite duct is hereinafter referred to as the "rubber-plastic duct". The rubber-plastic duct used for return air connects the indoor air and the outdoor fan. The negative pressure generated inside the rubber-plastic duct plays the role of recycling indoor air, which can maintain air circulation and make the indoor air fresher. When the negative pressure inside the soft rubber-plastic duct reaches a certain level, the outer wall of the rubber-plastic duct will show obvious collapse and deformation. Industrial ventilation often faces greater negative pressure. At this time, the depression of the rubber-plastic duct will hinder the flow of gas in the duct, thereby increasing resistance, reducing flow, resulting in low ventilation efficiency, and increasing the burden on the outdoor fan or even burning it. The rubber-plastic duct is prone to collapse and deformation during use, and it is necessary to install a support frame inside it to improve this phenomenon. The size of the rubber-plastic air duct is determined according to the air volume required by the project. The support frame needs to match the rubber-plastic air duct to prop it up and maintain a certain tension. The ventilation effect and visual effect of the rubber-plastic air duct are the best. However, the closer the size of the support frame is to the size of the air duct, the more time-consuming and labor-intensive it is to install it into the rubber-plastic air duct. The installation is difficult, the assembly efficiency is low, and it is very easy to cause damage to the rubber-plastic air duct. After installation, the rubber-plastic air duct cannot maintain sufficient tension, and there is a certain shaking phenomenon during use. Based on the above problems, the existing technology needs to be further improved. Utility Model Content

[0003] In view of the deficiencies of the above-mentioned prior art, the purpose of the utility model is to propose a return air duct structure with an adjustable inner support frame, so as to solve the problems that installing the support frame into the rubber-plastic air duct is time-consuming and labor-intensive, the installation is difficult, the assembly efficiency is low, and it is very easy to cause damage to the rubber-plastic air duct.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0005] A return air duct structure with an adjustable inner support frame comprises a plurality of return air duct units arranged in sequence, wherein the return air duct unit comprises a rubber-plastic duct body, a support frame and a hanging assembly, wherein the rubber-plastic duct body is a tubular structure with a square cross-section, each rubber-plastic duct body is arranged horizontally, and the corresponding ends of any two adjacent rubber-plastic duct bodies are connected by a zipper.

[0006] The support frame is arranged inside the rubber-plastic air duct body. The support frame is a rectangular metal frame compatible with the rubber-plastic air duct body. The support frame includes a plurality of square frames arranged vertically. The plurality of square frames are arranged in sequence at equal intervals along the length direction of the rubber-plastic air duct body. Any two adjacent square frames are fixedly connected at the four corners by longitudinal connecting rods.

[0007] The square frame includes two cross bars and two telescopic vertical bars. The two cross bars are arranged parallel to each other, and the two telescopic vertical bars are arranged between the two cross bars. The upper and lower ends of the telescopic vertical bars are fixedly connected to the corresponding ends of the two cross bars.

[0008] Each rubber-plastic air duct body is equipped with at least two of the hanging components, and the hanging components are arranged at intervals along the length direction of the rubber-plastic air duct body. The rubber-plastic air duct body can be installed on the top of the building and connected through the hanging components.

[0009] Furthermore, the rubber-plastic air duct body is a square tube body formed by bonding three layers together. The inner layer is a pressed fabric layer that can prevent air leakage, the middle layer is a rubber-plastic layer with thermal insulation functions, and the outer layer is a fire-proof fabric layer made of glass fiber.

[0010] Both ends of the rubber-plastic air duct body are planes perpendicular to its axis, and the corresponding end surfaces of the inner layer, the middle layer and the outer layer are flush.

[0011] Furthermore, an annular zipper tape A is arranged at one end of the rubber-plastic air duct body, and an annular zipper tape B matching the annular zipper tape A is arranged at the other end thereof, and a zipper head is arranged on the annular zipper tape A or the annular zipper tape B.

[0012] The annular zipper belt A and the annular zipper belt B located at the corresponding end form an annular zipper, and two adjacent rubber-plastic air duct bodies are detachably and hermetically connected through the annular zipper.

[0013] Furthermore, the first and last square frames also include four three-way connectors, which are respectively located at the four corners of the first or last square frame, and the end of the cross bar, the end of the retractable vertical rod and one end of the longitudinal connecting rod are all fixedly connected to the three-way connectors.

[0014] Furthermore, the square frame in the middle position also includes four four-way connectors, which are respectively located at the four corners of the square frame in the middle position, and the ends of the crossbar, the ends of the retractable vertical rods and the opposite ends of the longitudinal connecting rods on both sides of the square frame in the middle position are fixedly connected to the four-way connectors.

[0015] Furthermore, the telescopic upright pole comprises an upper pole body, a lower pole body and an adjustment assembly, wherein the upper pole body and the lower pole body are arranged coaxially and vertically opposite to each other, the upper end of the upper pole body is fixedly plugged with the upper three-way connector or the four-way connector, and the lower end of the lower pole body is fixedly plugged with the lower three-way connector or the four-way connector;

[0016] The adjusting assembly includes a screw rod and an adjusting nut. The lower end of the screw rod is coaxially fixedly connected to the upper end of the lower rod body, and the upper end thereof penetrates into the interior of the upper rod body. The adjusting nut is sleeved on the screw rod and located at the bottom of the lower rod body. The height of the telescopic vertical pole can be changed by rotating the adjusting nut.

[0017] Furthermore, the adjustment component also includes a positioning sleeve, which is movably mounted on the screw rod, and its upper end is fixedly connected to the bottom of the adjustment nut. The inner diameter of the positioning sleeve is larger than the diameter of the screw rod and smaller than the outer diameter of the lower rod body.

[0018] Furthermore, the hanging assembly includes a section of angle iron and two hanging rods, wherein the angle iron is horizontally arranged at the bottom of the rubber-plastic air duct body, and the two hanging rods are relatively arranged on the outside of both sides of the rubber-plastic air duct body, the lower end of the hanging rod is fixedly connected to the angle iron, and the upper end thereof can be connected to the top of the building.

[0019] Furthermore, the crossbar, longitudinal connecting rod, upper rod body and lower rod body are all hollow metal straight rod bodies with the same outer diameter, and each plug port of the three-way connector or the four-way connector matches the outer diameter of the hollow metal straight rod body.

[0020] By adopting the above technical solution, the beneficial technical effects of the utility model are:

[0021] 1. The return air duct of the utility model is equipped with a support frame with adjustable size. By lowering the height of the support frame, it can be easily installed inside the rubber-plastic air duct body. By increasing the height of the support frame, the rubber-plastic air duct body can be propped up and maintain a certain tension. The installation is quick and labor-saving. The installation process greatly reduces the damage to the pipeline, keeps the air duct ventilation smooth, full and beautiful, and is conducive to the normal operation of the fan and air supply duct.

[0022] 2. The rubber-plastic return air duct structure of the utility model is extremely light, and the main material uses soft materials. The requirements for logistics and transportation and the load-bearing requirements for the house are very low, and the safety factor is high.

[0023] 3. The utility model can be customized for standardized production, which saves time and effort in installation, has a short construction period, saves installation manpower and time, significantly improves installation efficiency, and has no unnecessary loss of materials.

[0024] 4. The flexible air duct will not produce any noise and can absorb some mechanical noise, with excellent silencing effect and long service life.

[0025] 5. Adhering to the concept of environmental protection, its design and processing will not produce any pollution and will not be affected by the external environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of a return air duct structure with an adjustable inner support frame of the utility model.

[0027] Figure 2 It is a structural schematic diagram of the return air duct unit of the utility model.

[0028] Figure 3 yes Figure 2 The structural schematic diagram of a certain part shows the rubber-plastic air duct body.

[0029] Figure 4 yes Figure 3 A partial enlarged view of part C.

[0030] Figure 5 yes Figure 2 A structural schematic diagram of another part of the figure shows a support frame.

[0031] Figure 6 yes Figure 5 A schematic diagram of the structure of the first or last square frame in .

[0032] Figure 7 yes Figure 5 Schematic diagram of the structure of the middle square frame in .

[0033] Figure 8 It is a partial exploded view of the telescopic upright pole of the utility model. DETAILED DESCRIPTION

[0034] The utility model is described in detail below with reference to the accompanying drawings:

[0035] Combination Figures 1 to 8 A return air duct structure with an adjustable inner support frame includes a plurality of return air duct units arranged in sequence, the return air duct unit includes a rubber-plastic duct body 1, a support frame and a hanging assembly 2, the rubber-plastic duct body 1 is a tubular structure with a square cross-section, and the corresponding ends of any two adjacent rubber-plastic duct bodies 1 are sealed and connected to form the overall structure of the return air duct for indoor ventilation.

[0036] The rubber-plastic air duct body 1 is formed by bonding three layers together. The inner layer 11 is a laminated fabric layer that can prevent airflow from leaking out. The middle layer 12 is a rubber-plastic layer with thermal insulation functions. The outer layer 13 is a fireproof fabric layer made of glass fiber.

[0037] Both ends of the rubber-plastic duct body 1 are planes perpendicular to its axis, and the corresponding end faces of the inner layer 11, the middle layer 12 and the outer layer 13 are flush. Each rubber-plastic duct body 1 is arranged horizontally, and the corresponding ends of any two adjacent rubber-plastic duct bodies 1 are connected by a zipper.

[0038] Specifically, an annular zipper belt A31 is provided at one end of the rubber-plastic air duct body 1, and an annular zipper belt B32 matching the annular zipper belt A31 is provided at the other end thereof, and a zipper head is arranged on the annular zipper belt A31 or the annular zipper belt B32. The annular zipper belt A31 and the annular zipper belt B32 at the corresponding end form an annular zipper, and two adjacent rubber-plastic air duct bodies 1 are detachably sealed and connected through the annular zipper.

[0039] The support frame is arranged inside the rubber-plastic air duct body 1. The support frame is a rectangular metal frame compatible with the rubber-plastic air duct body 1. The support frame includes a plurality of vertically arranged square frames 4. The plurality of square frames 4 are arranged in sequence at equal intervals along the length direction of the rubber-plastic air duct body 1. Any two adjacent square frames 4 are fixedly connected at the four corners by longitudinal connecting rods 5.

[0040] The square frame 4 includes two cross bars 41 and two retractable vertical bars. The two cross bars 41 are arranged parallel to each other, and the two retractable vertical bars are arranged between the two cross bars 41. The upper and lower ends of the retractable vertical bars are fixedly connected to the corresponding ends of the two cross bars 41 respectively.

[0041] Specifically, the first and last square frames 4 also include four three-way connectors 6, the three-way connector 6 has three plug-in interfaces, and any two adjacent plug-in interfaces of the three-way connector 6 are arranged at right angles. The four three-way connectors 6 are respectively located at the four corners of the first or last square frame 4, and the ends of the cross bar 41, the ends of the retractable vertical rods and one end of the longitudinal connecting rod 5 are respectively plugged and fixed in the three plug-in interfaces of the three-way connector 6, and are fixedly connected through the three-way connector 6.

[0042] The square frame 4 in the middle position also includes four four-way connectors 7, which have four plug-in interfaces. Any two adjacent plug-in interfaces of the four-way connector 7 are arranged at right angles. The four four-way connectors 7 are respectively located at the four corners of the square frame 4 in the middle position. The ends of the crossbar 41, the ends of the telescopic vertical rods and the opposite ends of the longitudinal connecting rods 5 on both sides of the square frame 4 in the middle position are respectively plugged and fixed in the four plug-in interfaces of the four-way connector 7, and are fixedly connected through the four-way connector 7.

[0043] The telescopic upright pole includes an upper pole body 42, a lower pole body 43 and an adjustment assembly, wherein the upper pole body 42 and the lower pole body 43 are arranged coaxially and vertically opposite to each other, the upper end of the upper pole body 42 is fixedly plugged with the upper three-way connector 6 or the four-way connector 7, and the lower end of the lower pole body 43 is fixedly plugged with the lower three-way connector 6 or the four-way connector 7. The crossbar 41, the longitudinal connecting rod 5, the upper pole body 42 and the lower pole body 43 are all hollow metal straight rod bodies with the same outer diameter, and each plug-in port of the three-way connector 6 or the four-way connector 7 matches the outer diameter of the hollow metal straight rod body.

[0044] The adjusting assembly includes a screw rod 44 and an adjusting nut 45. The lower end of the screw rod 44 is coaxially fixedly connected to the upper end of the lower rod body 43, and the upper end thereof penetrates into the interior of the upper rod body 42. The adjusting nut 45 is sleeved on the screw rod 44 and is located at the bottom of the lower rod body 43. The height of the telescopic vertical pole can be changed by rotating the adjusting nut 45.

[0045] Preferably, the adjustment assembly further comprises a positioning sleeve 46, which is movably sleeved on the screw rod 44, and the upper end of which is fixedly connected to the bottom of the adjusting nut 45. The inner diameter of the positioning sleeve 46 is larger than the diameter of the screw rod 44 and smaller than the outer diameter of the lower rod body 43. The upper rod body 42 and the upper crossbar 41 and the longitudinal connecting rod 5 can be raised or lowered by rotating the adjusting nut 45 with a wrench, so as to change the height of the support frame. When the wrench rotates the adjusting nut 45 to move downward, the positioning sleeve 46 moves with the adjusting nut 45. When the lower end of the positioning sleeve 46 contacts the fixing nut at the lower end of the screw rod 44, the minimum value of the change in the height of the support frame is reached, and the fixing nut at the lower end of the screw rod 44 is fixedly connected to the upper end of the lower rod body 43.

[0046] During the installation process, use a wrench to turn the adjusting nut 45 to lower the overall height of the support frame so that the support frame can be easily placed inside the rubber-plastic air duct body 1, and adjust the position of the support frame inside the rubber-plastic air duct body 1 to ensure that both ends of the rubber-plastic air duct body 1 protrude outward by a certain distance relative to the support frame. Then, enter the rubber-plastic air duct body 1 and use a wrench to turn the adjusting nut 45 to increase the overall height of the support frame. After the support frame is raised, it is close to the inner wall of the rubber-plastic air duct body 1 to achieve effective and stable support. In the above manner, multiple rubber-plastic air duct bodies 1 with support frames inside are assembled.

[0047] Each rubber-plastic duct body 1 is equipped with two of the hanging assemblies 2, and the two hanging assemblies 2 are arranged at intervals along the length direction of the rubber-plastic duct body 1, and the rubber-plastic duct body 1 can be installed on the top of the building through the hanging assemblies 2. Specifically, the hanging assembly 2 includes a section of angle iron 21 and two hanging rods 22, the angle iron 21 is horizontally arranged at the bottom of the rubber-plastic duct body 1, and the two hanging rods 22 are relatively arranged on the outside of the two sides of the rubber-plastic duct body 1, the lower end of the hanging rod 22 is fixedly connected to the angle iron 21, and the upper end thereof can be connected to the top of the building.

[0048] According to the construction design layout requirements, the rubber-plastic duct body 1 with an internal supporting frame is installed on the top of the building through the hoisting assembly 2. Afterwards, the corresponding ends of any two adjacent rubber-plastic duct bodies 1 are connected through a ring zipper to form a return air duct. One end of the return air duct is located indoors, and the other end is connected to the air inlet end of the outdoor fan, and the dirty air in the room is discharged through the return air duct.

[0049] The parts not described in the present invention can be realized by adopting or drawing on the existing technology.

[0050] Furthermore, the terms “first” and “second” are used for descriptive purposes only and should not be understood as indicating or implying relative importance.

[0051] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0052] Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by technicians in this technical field within the essential scope of the present invention should also fall within the protection scope of the present invention.

Claims

1. A return air duct structure with an adjustable inner support frame, characterized in that: It includes a plurality of return air duct units arranged in sequence, the return air duct unit includes a rubber-plastic air duct body, a support frame and a hoisting assembly, the rubber-plastic air duct body is a tubular structure with a square cross-section, each rubber-plastic air duct body is arranged horizontally, and the corresponding ends of any two adjacent rubber-plastic air duct bodies are connected by a zipper; The support frame is arranged inside the rubber-plastic air duct body. The support frame is a rectangular metal frame adapted to the rubber-plastic air duct body. The support frame includes a plurality of vertically arranged square frames. The plurality of square frames are arranged in sequence at equal intervals along the length direction of the rubber-plastic air duct body. Any two adjacent square frames are fixedly connected at the four corners by longitudinal connecting rods. The square frame includes two cross bars and two retractable vertical bars. The two cross bars are arranged parallel to each other, one above and one below. The two retractable vertical bars are arranged between the two cross bars, and the upper and lower ends of the retractable vertical bars are respectively fixedly connected to the corresponding ends of the two cross bars. Each rubber-plastic air duct body is equipped with at least two of the hanging components, and the hanging components are arranged at intervals along the length direction of the rubber-plastic air duct body. The rubber-plastic air duct body can be installed on the top of the building and connected through the hanging components.

2. The return air duct structure with an adjustable inner support frame according to claim 1, characterized in that: The rubber-plastic air duct body is a square tube body formed by bonding three layers together. The inner layer is made of a glued fabric layer that can prevent airflow from leaking out, the middle layer is made of a rubber-plastic layer with thermal insulation functions, and the outer layer is made of a fireproof fabric layer made of glass fiber. Both ends of the rubber-plastic air duct body are planes perpendicular to its axis, and the corresponding end surfaces of the inner layer, the middle layer and the outer layer are flush.

3. The return air duct structure with an adjustable inner support frame according to claim 1, characterized in that: One end of the rubber-plastic air duct body is provided with an annular zipper belt A, and the other end thereof is provided with an annular zipper belt B matching the annular zipper belt A, and a zipper head is arranged on the annular zipper belt A or the annular zipper belt B; The annular zipper belt A and the annular zipper belt B located at the corresponding end form an annular zipper, and two adjacent rubber-plastic air duct bodies are detachably and hermetically connected through the annular zipper.

4. The return air duct structure with an adjustable inner support frame according to claim 1, characterized in that: The first and last square frames also include four three-way connectors, which are respectively located at the four corners of the first or last square frame, and the ends of the crossbars, the ends of the telescopic vertical rods and one end of the longitudinal connecting rods are all fixedly connected to the three-way connectors.

5. The return air duct structure with an adjustable inner support frame according to claim 1, characterized in that: The square frame in the middle position also includes four four-way connectors, which are respectively located at the four corners of the square frame in the middle position. The ends of the crossbar, the ends of the telescopic vertical rods and the opposite ends of the longitudinal connecting rods on both sides of the square frame in the middle position are all fixedly connected to the four-way connectors.

6. A return air duct structure with an adjustable inner support frame according to claim 4 or 5, characterized in that: The telescopic upright pole comprises an upper pole body, a lower pole body and an adjustment assembly, wherein the upper pole body and the lower pole body are arranged coaxially and vertically opposite to each other, the upper end of the upper pole body is fixedly plugged with a three-way connector or a four-way connector above, and the lower end of the lower pole body is fixedly plugged with a three-way connector or a four-way connector below; The adjusting assembly includes a screw rod and an adjusting nut. The lower end of the screw rod is coaxially fixedly connected to the upper end of the lower rod body, and the upper end thereof penetrates into the interior of the upper rod body. The adjusting nut is sleeved on the screw rod and located at the bottom of the lower rod body. The height of the telescopic vertical pole can be changed by rotating the adjusting nut.

7. The return air duct structure with an adjustable inner support frame according to claim 6, characterized in that: The adjustment component also includes a positioning sleeve, which is movably sleeved on the screw rod, and its upper end is fixedly connected to the bottom of the adjustment nut. The inner diameter of the positioning sleeve is larger than the diameter of the screw rod and smaller than the outer diameter of the lower rod body.

8. The return air duct structure with an adjustable inner support frame according to claim 1, characterized in that: The hanging assembly includes a section of angle iron and two hanging rods. The angle iron is horizontally arranged at the bottom of the rubber-plastic air duct body, and the two hanging rods are relatively arranged on the outside of the two sides of the rubber-plastic air duct body. The lower end of the hanging rod is fixedly connected to the angle iron, and the upper end thereof can be connected to the top of the building.

9. The return air duct structure with an adjustable inner support frame according to claim 6, characterized in that: The crossbar, longitudinal connecting rod, upper rod body and lower rod body are all hollow metal straight rod bodies with the same outer diameter, and each plug-in port of the three-way connector or the four-way connector matches the outer diameter of the hollow metal straight rod body.

Images