An assembled rigid polyvinyl chloride (PVC) air duct and installation method

Abstract

The present invention discloses an assembled rigid polyvinyl chloride (PVC) air duct and an installation method. The air duct includes a plate and a socket strip. The socket strip has two slots set at an angle. The ends of the plate are inserted into the slots and fixed by glue. The adjacent plates are connected and enclosed by the socket strip to form an air duct. The air duct and the pipe fittings are connected by a flange strip. The flange strip is fixed to the end of the plate around the circumference of the air duct. The socket strip is wrapped with an angle piece. The angle piece is fixed to the plate by self-tapping screws. The angle pieces are arranged at intervals along the length direction of the air duct. This application uses PVC-U material to make the plate, and sets a steel mesh or steel belt inside the plate to increase the toughness of the plate, improve the pressure-bearing capacity of the air duct, reduce the thickness of the plate, make the plate lighter, and facilitate transportation and installation. Semi-finished products can be transported and assembled on site, saving transportation costs. It is very practical for long-distance transportation or international projects.

Description

Technical Field

[0001] The present invention relates to the technical field of air ducts, and in particular to an assembled rigid polyvinyl chloride (PVC) air duct and an installation method thereof. Background Art

[0002] At present, the commonly used PVC-U air ducts are of the following two forms:

[0003] 1. Use the shape, specifications and models of PVC water supply or drainage pipes as the ventilation system with small fresh air volume or exhaust volume. The pipe fittings used are also the elbows and tees corresponding to the water supply or drainage pipes. This method uses socket bonding and is suitable for family bathroom exhaust or fresh air with small air volume and short system.

[0004] 2. Use rectangular or circular air ducts directly processed by the processing plant, and use PVC-U material raw materials and finished product molds to directly process them into air duct sections and components of fixed size and length in the processing plant. This method uses flange bolts integrated with the air duct and components. It is suitable for fresh air or exhaust air in public buildings or industrial buildings with large air volume and long systems. The air duct sections and components of this type are all processed and manufactured in the factory. When encountering systems with large air volume, the air duct sections and components are very large.

[0005] The above two methods are currently commonly used. Although the first method is easy to purchase, transport, manufacture, and install, it is only suitable for household bathroom exhaust or fresh air with small air volume and short systems, and its application range is very limited. The second method is difficult to manufacture and transport due to the large size of the duct sections and components. The size and shape of the duct sections and components can only be determined based on the drawings of the pipe layout. Secondly, the thickness of the processed duct sheet is generally over 6mm. The larger the cross-section of the pipe, the thicker the sheet. The completed duct sections and pipe fittings are bulky, which wastes a lot of space during transportation. Summary of the Invention

[0006] The present invention provides an assembled rigid polyvinyl chloride (PVC) air duct and an installation method, which can transport semi-finished products and assemble them on site, thus saving transportation costs and being very practical for long-distance transportation or international projects.

[0007] The technical problem to be solved is that the existing air ducts are large in size, difficult to manufacture and transport, and waste a lot of space during transportation.

[0008] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0009] The present invention discloses an assembled rigid polyvinyl chloride (PVC) air duct, comprising a plate and a socket strip. The socket strip has two slots arranged at an angle. The ends of the plate are inserted into the slots and fixed by gluing. Adjacent plates are connected and enclosed by the socket strip to form an air duct.

[0010] The present invention provides an assembled rigid polyvinyl chloride (PVC) air duct. Furthermore, the plate and the socket strip are both made of PVC-U material.

[0011] The present invention provides an assembled rigid polyvinyl chloride (PVC) air duct, wherein the angles between the slots are 90°, 135°, 150° and 180° respectively.

[0012] The present invention provides an assembled rigid polyvinyl chloride (PVC) air duct. Furthermore, the air duct and the pipe component are connected via a flange strip. The flange strip is fixedly arranged at the end of the plate around the circumference of the air duct, and the cross section of the flange strip is arranged at a right angle.

[0013] The present invention provides an assembled rigid polyvinyl chloride (PVC) air duct. Furthermore, a steel mesh or a steel belt is provided inside the plate.

[0014] The present invention provides an assembled rigid polyvinyl chloride (PVC) air duct. Further, when the long side length of the rectangular air duct is 450 mm or less and less than 1500 mm, the plate thickness is set to 3 mm, and a 0.5 mm-1.0 mm steel mesh is arranged inside the plate; when the long side length of the rectangular air duct is 1500 mm or less and less than 2000 mm, the plate thickness is set to 5 mm, and a 0.5 mm-1.0 mm steel strip with a width of 20 mm is arranged inside the plate.

[0015] The present invention provides an assembled rigid polyvinyl chloride (PVC) air duct. Furthermore, the socket strip is wrapped with an angle piece, the angle piece is fixed to the plate by self-tapping screws, and a plurality of angle pieces are arranged at intervals along the length direction of the air duct.

[0016] The present invention provides an assembled rigid polyvinyl chloride (PVC) air duct, which further includes a corner piece arranged at the corner section of the air duct, wherein the corner piece is arranged at the corner of the air duct along the height direction of the air duct and is used to connect two plates at the corner, and the corner piece includes a first card slot and a second card slot for plugging and cooperating with the plates, the first card slot is provided with an arc groove away from the plug-in end, and the second card slot is fixed with an adapter column away from the plug-in end, the adapter column is inserted into the arc groove and rotatably cooperates with the arc groove, and the adapter column and the arc groove are fixed by glue after adjusting the angles of the first card slot and the second card slot.

[0017] The present invention provides an assembled rigid polyvinyl chloride (PVC) air duct. Furthermore, an axial hole is coaxially opened on the adapter column, a rotating shaft is inserted into the axial hole, and the rotating shaft connects a plurality of upper and lower corner pieces.

[0018] The present invention provides a method for installing an assembled rigid polyvinyl chloride (PVC) air duct, comprising the following steps:

[0019] Step 1: The factory processes the plates, socket strips, flange strips and corner pieces and transports them to the construction site;

[0020] Step 2: Assemble the straight section of the duct first. Apply glue to the ends of the panels, insert the panels into the slots on the socket strips, and secure them. The panels enclose the duct to form the duct. Wrap the angle pieces around the socket strips, and secure the angle pieces to the panels with self-tapping screws.

[0021] Step 3: Install the flange strip at the end of the plate where the air duct and the pipe fitting are connected. The flange strip is fixed to the plate with glue and self-tapping screws, and then the air duct and the pipe fitting are connected through the flange strip.

[0022] Step 4: Assemble the corner duct section. First, rotate the adapter column according to the angle of the corner, so that the angle between the first and second slots on the corner piece matches the angle of the duct corner. Then, inject glue into the arc groove and secure the adapter column in the arc groove to lock the corner piece. Then, insert the plate into the first and second slots and secure with glue. This completes the vertical connection of the corner duct section and connects it horizontally using the socket strip.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] 1. This application uses PVC-U material to make the panels, and installs steel mesh or steel belts inside the panels to increase the panels' toughness, improve the pressure-bearing capacity of the air duct, reduce the thickness of the panels, and make the panels lighter, making them easier to transport and install. The panels, socket strips, flanges, and other semi-finished products are all processed in the processing plant, reducing environmental pollution. The semi-finished products are transported and assembled on-site, saving transportation costs and being very practical for long-distance transportation or international projects. In addition, the panels of the air duct are fixed and sealed with glue, which has a better sealing effect than existing tape. The overall assembly of the air duct is simple and requires low operating skills.

[0025] 2. By setting corner pieces at the corners of the air duct, the angles of the corner pieces can be adjusted at will to adapt to the installation of different air duct angles on site. The angles can also be adjusted on site to adapt to changes in working conditions, which is more flexible, reduces construction costs, and improves construction efficiency.

[0026] The present invention will be further described below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic cross-sectional view of the air duct of the present invention;

[0028] Figure 2This is a schematic plan view of the air duct of the present invention;

[0029] Figure 3 This is a schematic diagram of the connection between the plate and the 135° socket strip at the corner of the air duct of the present invention;

[0030] Figure 4 This is a schematic diagram of the connection between the plate and the 180° socket strip of the present invention;

[0031] Figure 5 This is a schematic diagram of the structure of a 90° corner piece of the present invention;

[0032] Figure 6 This is a schematic diagram of the structure of the 135° corner piece of the present invention;

[0033] Figure 7 This is a schematic diagram of the steel wire mesh or steel belt structure inside the protruding plate of the present invention;

[0034] Figure 8 This is a schematic diagram of the corner piece structure in the second embodiment of the present invention;

[0035] Figure 9 This is a schematic elevation diagram of a corner piece in the second embodiment of the present invention;

[0036] Figure 10 This is a schematic diagram of the matching structure of the corner piece and the plate in the second embodiment of the present invention.

[0037] Reference numerals:

[0038] 1. Plate; 2. Socket strip; 3. Flange strip; 4. Slot; 5. Wire mesh or steel strip; 6. Angle piece; 7. Corner piece; 8. First slot; 9. Second slot; 10. Arc slot; 11. Adapter column; 12. Rotating shaft. DETAILED DESCRIPTION

[0039] Example 1:

[0040] like Figure 1-Figure 7 As shown, the present invention provides an assembled rigid polyvinyl chloride (PVC) air duct and an installation method. The air duct includes a plate 1, a socket strip 2 and a flange strip 3. The plate 1 and the socket strip 2 are both made of PVC-U material, wherein PVC-U is rigid polyvinyl chloride, and the flange strip 3 is made of PVC. The socket strip 2 has two slots 4 set at an angle. The ends of the plates 1 are inserted into the slots 4 and are fixed and sealed by water-supplying PVC glue. Adjacent plates 1 are connected and enclosed by the socket strip 2 to form an air duct.

[0041] The socket bars 2 come in the following sizes, with the preferred angles between the four slots being 90°, 135°, 150°, and 180°. Right-angled socket bars 2 are used to connect the four panels 1 on rectangular ducts. 135° and 150° socket bars are used to connect panels 1 at duct corners. The 180° socket bar 2 is used to connect panels 1 when increasing their length, and is suitable for long straight duct sections.

[0042] The flange strip 3 is arranged at the connection between the air duct and the pipe fitting components, and is used to connect the air duct and the pipe fitting components. The pipe fitting components include pipe fittings, valves, tees, elbows, air duct reducers and other parts. The cross-section of the flange strip 3 is arranged at a right angle, and it is fixed to the end of the plate 1 around the circumference of the air duct, wherein the flange strip 3 is fixed to the plate 1 by glue and self-tapping screws.

[0043] In addition, the flange strip 3 and the socket strip 2 are preferably set to 3-4 meters each, and can be manually cut on site as needed, which is more convenient and flexible. During installation, if the flange strip 3 and the socket strip 2 overlap, the overlapping part is measured, marked, and cut off during pre-assembly.

[0044] Furthermore, a steel mesh or steel belt 5 is set inside the plate 1. When the long side length of the rectangular air duct is 450mm≤≤1500mm, the thickness of the plate 1 is set to 3mm, and a 0.5mm-1.0mm steel mesh is set inside the plate 1; when the long side length of the rectangular air duct is 1500mm≤2000mm, the thickness of the plate 1 is set to 5mm, and a 0.5mm-1.0mm steel belt with a width of 20mm is set inside the plate 1, and the steel belt is arranged in a mesh shape.

[0045] When the air volume and wind pressure are small, the plate 1 is fixed and sealed with the above-mentioned glue as the main fixing method. When the air volume and wind pressure are large, a galvanized corner piece 6 is wrapped on the socket strip 2. The corner piece 6 is fixed to the plate 1 by self-tapping screws. Multiple corner pieces 6 are arranged at intervals along the length direction of the air duct. The spacing between the corner pieces 6 decreases with the increase of wind pressure, and the angle of the corner piece 6 is adapted to the angle of the socket strip 2.

[0046] The present application uses PVC-U material to make the plate 1, and arranges a wire mesh or steel belt 5 inside the plate 1 to increase the toughness of the plate 1, improve the pressure-bearing capacity of the air duct, reduce the thickness of the plate 1, make the plate 1 lighter, and facilitate transportation and installation; the semi-finished products such as the plate 1, socket strips 2, flange strips 3, etc. are all processed in the processing plant to reduce environmental pollution, and the semi-finished products are transported and assembled on site to save transportation costs, which is very practical for long-distance transportation or international projects; in addition, the plates 1 of the air duct are fixed and sealed with glue, and the sealing effect is better than the existing tape sealing. The overall assembly of the air duct is simple and does not require a high level of operation.

[0047] Example 2:

[0048] Reference Figures 8-10 , the difference from the first embodiment is that due to the complex on-site working conditions and the variable angles of the air duct corners, many molds are required to produce the corresponding socket strips 2, which increases the construction cost. In addition, during installation, socket strips 2 with similar angles will also cause trouble for the staff in selecting, affecting the installation progress. In response to the above problems, the present application also includes a corner piece 7 arranged at the corner section of the air duct. The corner piece 7 is arranged at the corner of the air duct along the height direction of the air duct for connecting the two plates 1 at the corner. The corner piece 7 includes a first card groove 8 and a second card groove 9 for plugging with the plate 1. The first card groove 8 is formed with an arc groove 10 away from the plug-in end. The arc groove 10 is preferably arranged in a semicircular arc. The second card groove 9 is formed with an adapter column 11 away from the plug-in end. The adapter column 11 is inserted into the arc groove 10 and rotates with the arc groove 10. The adapter column 11 and the arc groove 10 are fixed by glue after adjusting the angle between the first card groove 8 and the second card groove 9.

[0049] Furthermore, when the length of the corner piece 7 is smaller than the height of the air duct, two corner pieces 7 are spliced together for use. An axial hole is coaxially opened on the adapter column 11, and a rotating shaft 12 is inserted into the axial hole. The rotating shaft 12 connects multiple upper and lower corner pieces 7 for better stability.

[0050] By setting a corner piece 7 at the corner of the air duct, the angle of the corner piece 7 can be adjusted arbitrarily to adapt to the installation of different air duct angles on site, and the angle can be adjusted on site to adapt to changes in working conditions, which is more flexible, reduces construction costs and improves construction efficiency.

[0051] The installation method is as follows:

[0052] Step 1: The factory processes the plate 1, socket strip 2, flange strip 3 and corner piece 7 and transports them to the construction site;

[0053] Step 2: Assemble the straight section of the duct first. Apply glue to the end of the plate 1, insert the plate 1 into the slot 4 on the socket bar 2 and fix it. The plate 1 encloses the duct and wraps the angle piece 6 on the socket bar 2. The angle piece 6 is fixed to the plate 1 with self-tapping screws.

[0054] Step 3: Install flange strip 3 at the end of plate 1 where the air duct and the pipe fitting are connected. Flange strip 3 is fixed to plate 1 with glue and self-tapping screws, and then the air duct and the pipe fitting are connected through flange strip 3.

[0055] Step 4: Assemble the corner duct section. First, rotate the adapter column 11 according to the angle of the corner, so that the angle between the first slot 8 and the second slot 9 on the corner piece 7 matches the angle of the duct corner. Then, inject glue into the arc groove 10 and secure the adapter column 11 in the arc groove 10 to lock the corner piece 7. Then, insert the plate 1 into the first slot 8 and the second slot 9 and secure them with glue. This completes the vertical connection of the corner duct section and connects it horizontally using the socket strip 2.

[0056] The embodiments described above are merely descriptions of preferred implementations of the present invention and are not intended to limit the scope of the present invention. Without departing from the spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should fall within the scope of protection determined by the claims of the present invention.

Claims

1. An assembled rigid polyvinyl chloride (PVC) air duct, characterized by: It comprises a plate (1), a spigot (2), and a corner piece (7) arranged at a corner section of an air duct, wherein the spigot (2) has two slots (4) arranged at an angle, the ends of the plate (1) are inserted into the slots (4) and fixed by gluing, and adjacent plates (1) are connected and enclosed by the spigot (2) to form an air duct; The corner piece (7) is arranged at the corner of the air duct along the height direction of the air duct and is used to connect two plates (1) at the corner. The corner piece (7) includes a first card slot (8) and a second card slot (9) for plugging and matching with the plate (1). The first card slot (8) is provided with an arc groove (10) away from the plug-in end, and the second card slot (9) is fixed with an adapter column (11) away from the plug-in end. The adapter column (11) is inserted into the arc groove (10) and rotatably matched with the arc groove (10). After adjusting the angles of the first card slot (8) and the second card slot (9), the adapter column (11) and the arc groove (10) are fixed by glue.

2. The assembled rigid polyvinyl chloride (PVC) air duct according to claim 1, characterized in that: The plate (1) and the socket strip (2) are both made of PVC-U material.

3. The assembled rigid polyvinyl chloride (PVC) air duct according to claim 1, characterized in that: The angles between the slots (4) are 90°, 135°, 150° and 180° respectively.

4. The assembled rigid polyvinyl chloride (PVC) air duct according to claim 1, characterized in that: The air duct and the pipe fitting are connected via a flange strip (3), which is fixed to the end of the plate (1) around the circumference of the air duct, and the cross section of the flange strip (3) is arranged at a right angle.

5. The assembled rigid polyvinyl chloride (PVC) air duct according to claim 1, characterized in that: A steel mesh or a steel belt (5) is provided inside the plate (1).

6. The assembled rigid polyvinyl chloride (PVC) air duct according to claim 5, characterized in that: When the length of the long side of the rectangular air duct is 450 mm or less and the length of the long side of the rectangular air duct is 1500 mm or less, the thickness of the plate (1) is set to 3 mm, and a 0.5 mm to 1.0 mm steel mesh is set inside the plate (1); when the length of the long side of the rectangular air duct is 1500 mm or less and the length of the long side of the rectangular air duct is 2000 mm or less, the thickness of the plate (1) is set to 5 mm, and a 0.5 mm to 1.0 mm steel strip with a width of 20 mm is set inside the plate (1).

7. The assembled rigid polyvinyl chloride (PVC) air duct according to claim 1, characterized in that: The socket strip (2) is wrapped with an angle piece (6), and the angle piece (6) is fixed to the plate (1) by self-tapping screws. The angle piece (6) is arranged in multiple rows at intervals along the length direction of the air duct.

8. The assembled rigid polyvinyl chloride (PVC) air duct according to claim 1, characterized in that: An axial hole is coaxially provided on the adapter column (11), a rotating shaft (12) is inserted into the axial hole, and the rotating shaft (12) connects the upper and lower corner pieces (7).

9. A method for installing the assembled rigid polyvinyl chloride (PVC) air duct according to any one of claims 1 to 8, characterized in that: The following steps are involved: Step 1: The factory processes the plate (1), socket strips (2), flange strips (3) and corner pieces (7) and transports them to the construction site; Step 2: First, assemble the straight section of the air duct. First, apply glue to the end of the plate (1), insert the plate (1) into the slot (4) on the socket strip (2) and fix it. The plate (1) is enclosed to form the air duct. Wrap the angle piece (6) on the socket strip (2). The angle piece (6) is fixed to the plate (1) by self-tapping screws. Step 3: Install the flange strip (3). Install the flange strip (3) at the end of the plate (1) where the air duct and the pipe fitting are connected. The flange strip (3) is fixed to the plate (1) by glue and self-tapping screws. Then, the air duct and the pipe fitting are connected by the flange strip (3). Step 4: Assemble the corner section air duct. First, rotate the adapter column (11) according to the angle of the corner so that the angle between the first clamping groove (8) and the second clamping groove (9) on the corner piece (7) matches the angle of the air duct corner. Then, inject glue into the arc groove (10) and fix the adapter column (11) in the arc groove (10) to lock the corner piece (7). Then, insert the plate (1) into the first clamping groove (8) and the second clamping groove (9) correspondingly and fix them with glue to realize the vertical connection of the corner section air duct. Then, connect the corner section air duct horizontally through the socket strip (2).

Images