Quick connecting structure for square ventilating duct

Abstract

The utility model discloses a square ventilating duct quick connecting structure which comprises a first connecting surrounding edge installed at one end of a square duct and a second connecting surrounding edge installed at the end of a second square duct, and the four faces, close to one side of the second connecting surrounding edge, of the first connecting surrounding edge are each fixedly connected with two symmetrical inserting blocks. The four faces of the side, close to the first connecting surrounding edge, of the second connecting surrounding edge are each provided with two rectangular penetrating holes allowing the inserting blocks to penetrate through. The inserting blocks on the first connecting surrounding edge penetrate through the rectangular penetrating holes in the second connecting surrounding edge, then the long shaft pin is taken up to be placed in the inner cavities of the L-shaped grooves in the two inserting blocks, the long shaft pin slides to the deepest positions of the inner cavities of the L-shaped grooves, then the long shaft pin is operated to rotate, the convex end of the eccentric rod abuts against the second connecting surrounding edge, and the long shaft pin is driven to rotate. And then the inserting block moves towards the second connecting surrounding edge through the long shaft pin, so that the first connecting surrounding edge is firmly attached to the second connecting surrounding edge, and the purposes that the two pipe joints are rapidly connected through a rotary tensioning structure, and the connecting efficiency is improved can be achieved.

Description

Technical Field

[0001] This utility model belongs to the field of ventilation system technology, and in particular relates to a quick connection structure for square ventilation ducts. Background Technology

[0002] Ventilation is the exchange of indoor and outdoor air through artificial or natural means. A ventilation system is a set of pipes and equipment designed to achieve the function of ventilation. The ventilation ducts in the ventilation system are usually galvanized iron ducts. Two adjacent pipe sections of the ventilation duct are usually fixed together by multiple bolts. The bolts are time-consuming and laborious to align and tighten. Therefore, we designed a quick connection structure for square ventilation ducts. It adopts a rotating tensioning structure to quickly connect two pipe sections and improve the connection efficiency. Utility Model Content

[0003] The purpose of this invention is to provide a quick-connect structure for square ventilation ducts, which has the advantage of using a rotating tensioning structure to quickly connect two pipe sections and improve connection efficiency, thereby solving the aforementioned technical problems.

[0004] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A quick connection structure for a square ventilation duct includes a first connecting edge installed at one end of a square duct and a second connecting edge installed at the other end of a square duct. Two symmetrical inserts are fixedly connected to the four sides of the first connecting edge near the second connecting edge. Two rectangular through holes for the inserts to pass through are opened on the four sides of the second connecting edge near the first connecting edge. An L-shaped groove is opened on the insert. A long shaft pin is placed in the inner cavity of the two L-shaped grooves. An eccentric rod is fixedly connected to the surface of the long shaft pin. A manual rotating block is fixedly connected to one side of the eccentric rod. Limiting seats for limiting the movement of the manual rotating block are fixedly connected to the four sides of the second connecting edge away from the first connecting edge.

[0005] Preferably, the limiting seat is provided with two deformable plates, and limiting protrusions are fixedly connected to the opposite sides of the two deformable plates.

[0006] Preferably, the limiting protrusion abuts against one side of the manual rotating block, and both sides of the limiting protrusion are provided with arc surfaces.

[0007] Preferably, square grooves are provided on the opposite sides of the first and second connecting edges, and square sealing rings are installed in the inner cavities of the two square grooves.

[0008] Preferably, the L-shaped groove is L-shaped, and the inlet width of the L-shaped groove is the same as the diameter of the long shaft pin.

[0009] The beneficial effects of the utility model are:

[0010] 1. This utility model involves inserting a block on the first connecting edge through a rectangular through hole on the second connecting edge, then placing a long shaft pin inside the L-shaped groove on the two inserts, and sliding the long shaft pin to the deepest part of the L-shaped groove. Then, the long shaft pin is rotated so that the convex end of the eccentric rod abuts against the second connecting edge, and the inserts are moved towards the second connecting edge through the long shaft pin, so that the first connecting edge and the second connecting edge are firmly attached. This achieves the purpose of quickly connecting two pipe sections by using a rotating tensioning structure, thereby improving the connection efficiency.

[0011] 2. By using a square groove and a square sealing ring in combination, the square sealing ring in the inner cavity of the square groove on the first connecting edge and the second connecting edge deforms during the process of the two connecting edges fitting together, thereby improving the sealing effect between the two ventilation duct sections. Attached Figure Description

[0012] The advantages of the present invention, as described above and / or in the following detailed description in conjunction with the accompanying drawings, will become clearer and more readily understood. These drawings are merely illustrative and do not limit the scope of the present invention.

[0013] Figure 1 This is a perspective view of one embodiment of the present utility model;

[0014] Figure 2 This is one embodiment of the present utility model. Figure 1 A magnified view of point A in the middle;

[0015] Figure 3 This is a three-dimensional disassembled schematic diagram of one embodiment of the present utility model;

[0016] Figure 4 This is one embodiment of the present utility model. Figure 3 A magnified view of point B in the middle.

[0017] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0018] 1. Square pipe one, 2. Square pipe two, 3. Connecting edge one, 4. Connecting edge two, 5. Insert block, 6. Rectangular through hole, 7. L-shaped groove, 8. Long shaft pin, 9. Eccentric rod, 10. Manual rotating block, 11. Limit seat, 12. Deformable plate, 13. Limiting protrusion, 14. Square groove, 15. Square sealing ring. Detailed Implementation

[0019] In the following description, embodiments of the quick-connect structure for square ventilation ducts of this invention will be described with reference to the accompanying drawings. Example

[0020] Figure 1-4This invention illustrates a quick-connect structure for a square ventilation duct according to an embodiment of the present invention. It includes a connecting edge 3 installed at one end of a square duct 1 and a connecting edge 4 installed at one end of a square duct 2. Two symmetrical inserts 5 are fixedly connected to each of the four sides of the connecting edge 3 near the connecting edge 4. Two rectangular through holes 6 are provided on each of the four sides of the connecting edge 4 near the connecting edge 3 for the inserts 5 to pass through. L-shaped grooves 7 are provided on the inserts 5, and long shaft pins 8 are placed inside the two L-shaped grooves 7. The L-shaped grooves 7 are L-shaped. The inlet width of 7 is the same as the diameter of the long shaft pin 8. An eccentric rod 9 is fixedly connected to the surface of the long shaft pin 8. A manual rotating block 10 is fixedly connected to one side of the eccentric rod 9. Limiting seats 11 for limiting the movement of the manual rotating block 10 are fixedly connected to all four sides of the connecting edge 2 4 away from the connecting edge 1 3. Two deformable plates 12 are provided on the limiting seat 11. Limiting protrusions 13 are fixedly connected to the opposite side of the two deformable plates 12. The limiting protrusions 13 abut against one side of the manual rotating block 10. Arc surfaces are provided on both sides of the limiting protrusions 13. Example

[0021] Figure 1-4 This invention illustrates a quick-connect structure for square ventilation ducts according to an embodiment of the present invention. It includes a connecting edge 3 installed at one end of a square duct 1 and a connecting edge 4 installed at one end of a square duct 2. Two symmetrical inserts 5 are fixedly connected to each of the four sides of the connecting edge 3 near the connecting edge 4. A square groove 14 is provided on the opposite side of the connecting edge 3 and the connecting edge 4. A square sealing ring 15 is installed inside the cavity of each of the two square grooves 14. Through the cooperation of the square grooves 14 and the square sealing rings 15, during the process of the connecting edge 3 and the connecting edge 4 fitting together, the square sealing rings 15 inside the square grooves 14 on the connecting edge 3 and the connecting edge 4 deform, thereby improving the connection between the two ventilation duct sections. To improve the sealing effect, two rectangular through holes 6 are provided on all four sides of the connecting edge 2 4 near the connecting edge 1 3 for the insertion block 5 to pass through. The insertion block 5 has an L-shaped groove 7. The inner cavity of the two L-shaped grooves 7 is filled with a long shaft pin 8. An eccentric rod 9 is fixedly connected to the surface of the long shaft pin 8. A manual rotating block 10 is fixedly connected to one side of the eccentric rod 9. On all four sides of the connecting edge 2 4 away from the connecting edge 1 3, a limiting seat 11 is fixedly connected to limit the movement of the manual rotating block 10. Two deformable plates 12 are provided on the limiting seat 11. A limiting protrusion 13 is fixedly connected to the opposite side of the two deformable plates 12. The limiting protrusion 13 abuts against one side of the manual rotating block 10. Both sides of the limiting protrusion 13 are provided with arc surfaces.

[0022] Working principle: In use, the insert 5 on the connecting edge 1 3 passes through the rectangular through hole 6 on the connecting edge 2 4. Then, the long shaft pin 8 is placed in the inner cavity of the L-shaped groove 7 on the two inserts 5, allowing the long shaft pin 8 to slide to the deepest part of the L-shaped groove 7. The manual rotating block 10 is then manually rotated, causing the eccentric rod 9 and the long shaft pin 8 to rotate. The protruding end of the eccentric rod 9 will slowly press against the connecting edge 2 4. The long shaft pin 8 on the eccentric rod 9 passes through the inner cavity of the L-shaped groove 7, causing the insert 5 to drive the connecting edge 2 4. Edge 3 presses against connecting edge 4, thus making connecting edge 3 and connecting edge 4 fit together firmly until the manual rotating block 10 rotates to the limiting seat 11. The manual rotating block 10 will press against the limiting protrusion 13, causing the deformable plate 12 to deform outward until the manual rotating block 10 moves to contact the limiting seat 11. The restoring force of the deformable plate 12 causes the limiting protrusion 13 to abut against the outside of the manual rotating block 10, restricting the rotation of the manual rotating block 10, thereby ensuring the firmness of the connection between connecting edge 3 and connecting edge 4.

[0023] In summary, this quick-connect structure for square ventilation ducts involves inserting blocks 5 on connecting edge 1 3 through rectangular perforations 6 on connecting edge 2 4, then placing long shaft pins 8 into the inner cavities of the L-shaped grooves 7 on the two insert blocks 5, allowing the long shaft pins 8 to slide to the deepest point of the L-shaped grooves 7. Next, the long shaft pins 8 are rotated, causing the convex end of the eccentric rod 9 to abut against connecting edge 2 4. This allows the insert blocks 5 to move towards connecting edge 2 4 via the long shaft pins 8, resulting in a firm fit between connecting edge 1 3 and connecting edge 2 4. This achieves the goal of quickly connecting two pipe sections using a rotational tensioning structure, thus improving connection efficiency.

Claims

1. A quick-connect structure for a square ventilation duct, characterized in that, The device includes a connecting edge 1 (3) installed at the end of a square pipe 1 (1) and a connecting edge 2 (4) installed at the end of a square pipe 2 (2). Two symmetrical inserts (5) are fixedly connected to the four sides of the connecting edge 1 (3) near the connecting edge 2 (4). Two rectangular through holes (6) for the inserts (5) to pass through are opened on the four sides of the connecting edge 2 (4) near the connecting edge 1 (3). An L-shaped groove (7) is opened on the insert (5). A long shaft pin (8) is placed in the inner cavity of the two L-shaped grooves (7). An eccentric rod (9) is fixedly connected to the surface of the long shaft pin (8). A manual rotating block (10) is fixedly connected to one side of the eccentric rod (9). A limiting seat (11) for limiting the movement of the manual rotating block (10) is fixedly connected to the four sides of the connecting edge 2 (4) away from the connecting edge 1 (3).

2. The quick-connect structure for a square ventilation duct according to claim 1, characterized in that, The limiting seat (11) is provided with two deformable plates (12), and the two deformable plates (12) are fixedly connected to the opposite side of each other by a limiting protrusion (13).

3. The quick-connect structure for a square ventilation duct according to claim 2, characterized in that, The limiting protrusion (13) abuts against one side of the manual rotating block (10), and both sides of the limiting protrusion (13) are provided with arc surfaces.

4. The quick-connect structure for a square ventilation duct according to claim 3, characterized in that, A square groove (14) is provided on the opposite side of the first connecting edge (3) and the second connecting edge (4), and a square sealing ring (15) is installed in the inner cavity of the two square grooves (14).

5. The quick-connect structure for a square ventilation duct according to claim 4, characterized in that, The L-shaped groove (7) is L-shaped, and the inlet width of the L-shaped groove (7) is the same as the diameter of the long shaft pin (8).

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