Composite ventilating duct

Abstract

The utility model relates to the technical field of air pipes, and discloses a composite ventilating duct, which comprises an internal plastic inner pipe and an external galvanized plate, the galvanized plate is sleeved outside the plastic inner pipe, vertical plates I are vertically fixed on four end edges of one side of the galvanized plate, the middle part of each vertical plate I is connected with a hollow short pipe, and the middle part of each vertical plate I is connected with the corresponding short pipe. Second vertical plates are vertically fixed to the middles of the four end edges of the other side of the galvanized plate opposite to the first vertical plates, two symmetrically-arranged abutting blocks are symmetrically hinged to the surface, away from the first vertical plates, of the galvanized plate, the two abutting blocks can be inserted into the short pipes, and a wedge-shaped push plate is slidably inserted between the two abutting blocks. The connecting device has the following advantages and effects that single ventilating pipelines can be connected, the connecting method is simple and easy to operate, the ventilating pipelines with required lengths can be formed through free combination, and the practicability is greatly improved.

Description

Technical Field

[0001] This utility model relates to the technical field of ventilation ducts, and in particular to a composite ventilation duct. Background Technology

[0002] Ventilation ducts, short for ventilation ducts, are metal or non-metal pipes used in ventilation and air conditioning systems for industrial and civil buildings. Based on their materials, ventilation ducts can be categorized into stainless steel ventilation ducts, carbon steel ducts, galvanized steel ducts, fiberglass ducts, plastic ventilation ducts, composite material ventilation ducts, coated fabric ventilation ducts, color steel sandwich ventilation ducts, aluminum foil insulated ventilation ducts, and more.

[0003] Traditional composite ducts are large in size, requiring a large space for transportation and installation, resulting in high costs. Installation efficiency also needs to be improved. In addition, the thermal insulation performance of the ducts needs to be enhanced. Utility Model Content

[0004] The purpose of this invention is to provide a composite ventilation duct that has the advantages of good heat preservation, convenient installation, and improved work efficiency.

[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution: It includes an inner plastic tube and an outer galvanized sheet. The galvanized sheet is fitted over the inner plastic tube. Vertical plates are fixed to the four ends of one side of the galvanized sheet. A hollow short tube is connected to the middle of each vertical plate. Vertical plates are fixed to the middle of the four ends of the galvanized sheet opposite to the vertical plates. Two symmetrically arranged abutment blocks are symmetrically hinged to the surface of the galvanized sheet away from the vertical plates. The two abutment blocks can be inserted into the short tube. A wedge-shaped push plate is slidably inserted between the two abutment blocks. The wedge-shaped push plate drives the two abutment blocks away from each other and presses them tightly against the inner wall of the short tube.

[0006] The present invention is further configured as follows: the abutting block includes a connecting part one and an abutting part one. The abutting part one is a trapezoidal body with a right-angled trapezoidal cross-section. The inclined surfaces of the two abutting parts one are close to each other and gradually move away from each other in the direction close to the vertical plate one. The cross-section of the connecting part one is rectangular. The wedge-shaped push plate includes a connecting part two and an abutting part two. The cross-section of the connecting part two is rectangular. The cross-section of the abutting part two is an isosceles triangle. The two sides of the abutting part two are close to and fit against the inclined side of the abutting part one.

[0007] A further feature of this invention is that an annular groove is recessed within the outer ring of the abutting portion, and a rubber ring is fitted inside the annular groove.

[0008] A further feature of this invention is that: springs are connected to the outer surfaces of the two connecting parts that are far apart, and the springs drive the two abutting blocks to approach each other; the other ends of the two connecting parts are hinged to the supporting vertical plates on the two sides of the vertical plate.

[0009] A further feature of this invention is that it includes a driving mechanism, which includes a wedge block one, the cross-section of which is a right-angled triangle, the wedge block one engaging with the wedge block two at the two ends of the connecting part, and the wedge block one being horizontally slidably connected to the side of the vertical plate.

[0010] A further feature of this invention is that: a wedge block three is provided on the other side of the wedge block one; the wedge block three and the wedge block four, which are slidably connected to the vertical plate two, are wedge-shaped and engaged; a support plate is vertically fixed to the top edge of the vertical plate two; a screw is threaded through the support plate; and the bottom of the screw is rotatably connected to the wedge block four.

[0011] A further feature of this invention is that vertical plate one and vertical plate two are symmetrically arranged on opposite sides of the same side of the galvanized sheet.

[0012] A further feature of this invention is that an insulation layer is provided between the plastic inner tube and the galvanized sheet, and the insulation layer is made of rigid polyurethane foam.

[0013] A further feature of this invention is that an operating plate is provided on the top of the screw.

[0014] A further feature of this invention is that a reinforcing plate is provided in the middle of the plastic inner tube.

[0015] The beneficial effects of this utility model are:

[0016] 1. When connecting adjacent ventilation ducts, first insert the abutment block on vertical plate two into the short pipe of vertical plate one, then rotate the screw to drive it down towards the galvanized plate. At this time, wedge block four descends, driving wedge block three (i.e., wedge block one) to slide horizontally on vertical plate two. Wedge block one then drives wedge block two on connecting part two to approach vertical plate one. Due to the sliding of connecting part two (i.e., abutment part two), abutment part two drives the two abutment parts one to move away from each other. Then, the rubber ring on the outer sleeve of abutment part one abuts inside the short pipe. At this time, vertical plate one and vertical plate two are fitted and fixed together, realizing the connection between individual ventilation ducts. The connection method is simple and easy to operate, and can be freely combined to form ventilation ducts of the required length, greatly improving practicality.

[0017] 2. By symmetrically setting vertical plates one and two on both sides of a single galvanized sheet, the connection stability of adjacent ventilation ducts is improved.

[0018] 3. By setting up an insulation layer, its thermal insulation performance is effectively improved. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of 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.

[0020] Figure 1 This is a schematic diagram of the structure of this utility model.

[0021] Figure 2 This is a schematic diagram of the structure after the two ventilation pipes are connected in this utility model.

[0022] Figure 3 yes Figure 2 A schematic diagram of the structure after separation.

[0023] In the diagram: 1. Plastic inner tube; 2. Galvanized sheet; 3. Vertical plate one; 4. Abutting block; 41. Connecting part one; 42. Abutting part one; 5. Wedge-shaped push plate; 51. Connecting part two; 52. Abutting part two; 6. Vertical plate two; 7. Spring; 8. Wedge block one; 9. Wedge block two; 10. Wedge block three; 11. Supporting horizontal plate; 12. Screw; 13. Reinforcing plate; 14. Rubber ring; 15. Insulation layer; 16. Short pipe; 17. Wedge block four. Detailed Implementation

[0024] The technical solution of this utility model will now be clearly and completely described with reference to specific embodiments. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0025] Example: A composite ventilation duct, such as Figure 1-3As shown, the device includes an inner plastic tube 1 and an outer galvanized sheet 2. The galvanized sheet 2 is fitted over the inner plastic tube 1. Vertical plates 3 are vertically fixed to the four ends of one side of the galvanized sheet 2. A hollow short tube 16 is connected to the middle of each vertical plate 3. Vertical plates 6 are vertically fixed to the middle of the four ends of the galvanized sheet 2 opposite to the vertical plates 3. Two symmetrically arranged abutment blocks 4 are symmetrically hinged to the surface of the galvanized sheet 2 away from the vertical plates 3. The two abutment blocks 4 can be inserted into the short tube 16. A wedge-shaped push plate 5 is slidably inserted between the two abutment blocks 4. The wedge-shaped push plate 5 drives the two abutment blocks 4 away from each other and presses them tightly against the inner wall of the short tube 16. Each abutment block 4 includes a connecting part. 41 and abutting part 42, abutting part 42 is a trapezoidal body with a right-angled trapezoidal cross-section. The inclined surfaces of the two abutting parts 42 are close to each other and gradually move away from each other in the direction close to the vertical plate 3. The cross-section of connecting part 41 is rectangular. The wedge-shaped push plate 5 includes connecting part 2 51 and abutting part 2 52. The cross-section of connecting part 2 51 is rectangular, and the cross-section of abutting part 2 52 is an isosceles triangle. The two sides of abutting part 2 52 are close to and fit against the inclined side of abutting part 42. It also includes a driving mechanism. The driving mechanism includes a wedge block 1 8. The cross-section of wedge block 1 8 is a right-angled triangle. Wedge block 1 8 and wedge block 2 9 at the end of connecting part 2 51 are wedge-shaped and fit together. Wedge block 18 is horizontally slidably connected to the side of vertical plate 13. Wedge block 310 is provided on the other side of wedge block 18. Wedge block 310 and wedge block 417, which is slidably connected to vertical plate 26, are wedge-shaped and engage. A support plate 11 is vertically fixed to the top edge of vertical plate 26. A screw 12 is threaded through the support plate 11. The bottom of screw 12 is rotatably connected to wedge block 417. An annular groove is recessed in the outer ring of the abutment part 142, and a rubber ring 14 is fitted inside the annular groove. When connecting adjacent ventilation ducts, first, the abutment block 4 on vertical plate 26 is aligned with the short pipe 16 of vertical plate 13 and inserted. Then, screw 12 is rotated to drive the screw... As rod 12 descends and approaches galvanized plate 2, wedge block 4 17 descends, driving wedge block 3 10 (i.e., wedge block 1 8) to slide horizontally on vertical plate 2 6. Wedge block 1 8 then drives wedge block 2 9 on connecting part 2 51 to approach vertical plate 1 3. Due to the sliding of connecting part 2 51 (i.e., abutting part 2 52), abutting part 2 52 drives two abutting parts 1 42 to move away from each other. Then, the rubber ring 14 on the outer sleeve of abutting part 1 42 abuts against the inside of short pipe 16. At this time, vertical plate 1 3 and vertical plate 2 6 are attached and fixed together, realizing the connection between individual ventilation ducts. The connection method is simple and easy to operate, and can be freely combined to form ventilation ducts of the required length, greatly improving practicality.

[0026] Furthermore, springs 7 are connected to the outer sides of the two connecting parts 41 that are far apart. The springs 7 drive the two abutting blocks 4 to move closer together. The other ends of the two connecting parts 51 are hinged to the supporting vertical plate on the side of the vertical plate 6.

[0027] Furthermore, vertical plates 3 and 6 are symmetrically arranged on opposite sides of the same side of the galvanized sheet 2.

[0028] Furthermore, an insulation layer 15 is provided between the plastic inner tube 1 and the galvanized plate 2. The insulation layer 15 is made of rigid polyurethane foam, which effectively improves its insulation performance.

[0029] Furthermore, an operating panel is provided on the top of the screw 12.

[0030] Furthermore, a reinforcing plate 13 is provided in the middle of the plastic inner tube 1 to improve the strength of the entire ventilation duct.

[0031] The working principle of a composite ventilation duct:

[0032] When connecting adjacent ventilation ducts, first insert the abutment block 4 on vertical plate 26 into the short pipe 16 of vertical plate 13. Then rotate screw 12 to drive it down and approach galvanized plate 2. At this time, wedge block 4 17 descends, driving wedge block 3 10, i.e. wedge block 18, to slide horizontally on vertical plate 26. Wedge block 18 then drives wedge block 2 9 on connecting part 2 51 to approach vertical plate 13. Due to the sliding of connecting part 2 51, i.e. abutment part 2 52, abutment part 2 52 drives the two abutment parts 1 42 to move away from each other. Then the rubber ring 14 on the outer sleeve of abutment part 1 42 abuts inside the short pipe 16. At this time, vertical plate 13 and vertical plate 26 are attached and fixed together, realizing the connection between individual ventilation ducts. The connection method is simple and easy to operate, and can be freely combined to form ventilation ducts of the required length, greatly improving practicality.

Claims

1. A composite ventilation duct, characterized in that: The device includes an inner plastic tube (1) and an outer galvanized sheet (2). The galvanized sheet (2) is fitted over the inner plastic tube (1). Vertical plates (3) are fixed vertically to the four ends of one side of the galvanized sheet (2). A hollow short tube (16) is connected to the middle of each vertical plate (3). Vertical plates (6) are fixed vertically to the middle of the four ends of the galvanized sheet (2) opposite to the vertical plates (3). Two symmetrically arranged abutment blocks (4) are symmetrically hinged to the surface of the galvanized sheet (2) away from the vertical plates (3). The two abutment blocks (4) can be inserted into the short tube (16). A wedge-shaped push plate (5) is slidably inserted between the two abutment blocks (4). The wedge-shaped push plate (5) drives the two abutment blocks (4) to move away from each other and stick to the inner wall of the short tube (16).

2. The composite ventilation duct according to claim 1, characterized in that: The abutting block (4) includes a connecting part one (41) and an abutting part one (42). The abutting part one (42) is a trapezoidal body with a right-angled trapezoidal cross-section. The inclined surfaces of the two abutting parts one (42) are close to each other and gradually move away from each other in the direction close to the vertical plate one (3). The connecting part one (41) has a rectangular cross-section. The wedge-shaped push plate (5) includes a connecting part two (51) and an abutting part two (52). The connecting part two (51) has a rectangular cross-section. The abutting part two (52) has an isosceles triangle cross-section. The two sides of the abutting part two (52) are close to and fit against the inclined side of the abutting part one (42).

3. A composite ventilation duct according to claim 2, characterized in that: The outer ring of the abutting part (42) is provided with an annular groove, and a rubber ring (14) is sleeved in the annular groove.

4. A composite ventilation duct according to claim 3, characterized in that: Two of the connecting parts (41) are connected to springs (7) on their outer sides that are far apart. The springs (7) drive the two abutting blocks (4) to move closer together. The other ends of the two connecting parts (51) are hinged to the supporting vertical plate on the side of the vertical plate (6) on opposite sides.

5. A composite ventilation duct according to claim 4, characterized in that: It also includes a drive mechanism, which includes a wedge block (8) with a right-angled triangle cross section. The wedge block (8) is wedge-shaped and engages with the wedge block (9) at the end of the connecting part (51). The wedge block (8) is horizontally slidably connected to the side of the vertical plate (3).

6. A composite ventilation duct according to claim 5, characterized in that: On the other side of the wedge block one (8), there is a wedge block three (10). The wedge block three (10) is wedge-shaped and slidingly connected to the wedge block four (17) on the vertical plate two (6). The top edge of the vertical plate two (6) is vertically fixed with a support plate (11). A screw (12) is threaded through the support plate (11). The bottom of the screw (12) is limited and rotatably connected to the wedge block four (17).

7. A composite ventilation duct according to claim 6, characterized in that: The galvanized sheet (2) has two vertical plates (3) and two vertical plates (6) symmetrically arranged on opposite sides of the same side.

8. A composite ventilation duct according to claim 7, characterized in that: A thermal insulation layer (15) is also provided between the plastic inner tube (1) and the galvanized plate (2), and the thermal insulation layer (15) is made of rigid polyurethane foam.

9. A composite ventilation duct according to claim 8, characterized in that: An operating plate is provided on the top of the screw (12).

10. A composite ventilation duct according to claim 9, characterized in that: A reinforcing plate (13) is provided in the middle of the plastic inner tube (1).

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