A quick-connect structure for laboratory ventilation ducts

Abstract

This utility model discloses a quick-connect structure for laboratory ventilation ducts, relating to the field of ventilation duct technology. It includes a first duct and a second duct, arranged sequentially from left to right. A first connecting ring and a second connecting ring are fixedly connected to adjacent ends of the first and second ducts, respectively. Two insert rods are fixedly arranged on the side of the first connecting ring closest to the second connecting ring. Insert holes are formed on the side of the second connecting ring closest to the first connecting ring, corresponding to the positions of the insert rods. The insert rods are inserted into the corresponding holes. First grooves are formed on both outer walls of the first connecting ring, and second grooves are formed on both outer walls of the second connecting ring. First limiting mechanisms are provided inside the first and second grooves to restrict the movement of the first connecting ring relative to the second connecting ring. This utility model enables quick connection of ventilation ducts without the need for tools, making it convenient, time-saving, and labor-saving.

Description

Technical Field

[0001] This utility model relates to the field of ventilation duct technology, specifically to a quick-connect structure for laboratory ventilation ducts. Background Technology

[0002] In laboratories, ventilation systems are a crucial component for ensuring a safe laboratory environment, and ventilation ducts are key parts of these systems, used to expel harmful gases from the laboratory. Currently, laboratory ventilation ducts are typically connected using flanges, which involves bolting the flanges of two ducts together. This connection method requires tools such as wrenches, is cumbersome to operate, has low installation efficiency, and is difficult to perform in confined spaces. Utility Model Content

[0003] In view of the problems existing in the above-mentioned laboratory ventilation duct connection structure, this utility model is proposed.

[0004] Therefore, the purpose of this utility model is to provide a quick connection structure for laboratory ventilation ducts, which solves the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A quick-connect structure for laboratory ventilation ducts includes a first duct and a second duct, arranged sequentially from left to right. A first connecting ring and a second connecting ring are fixedly connected to the adjacent ends of the first and second ducts, respectively. Two insert rods are fixedly arranged on the side of the first connecting ring closest to the second connecting ring. Insert holes are formed on the side of the second connecting ring closest to the first connecting ring, corresponding to the positions of the insert rods. The insert rods are inserted into the corresponding insertion holes. First grooves are formed on both outer walls of the first connecting ring, and second grooves are formed on both outer walls of the second connecting ring. A first limiting mechanism is provided inside the first and second grooves to restrict the movement of the first connecting ring relative to the second connecting ring.

[0007] Preferably, the first limiting mechanism includes an L-shaped block and a stop block. The stop block is fixedly disposed inside the first groove, and the L-shaped block is disposed inside the second groove. A rotating rod is fixedly sleeved on one end of the L-shaped block. Both ends of the rotating rod are rotatably connected to the inner wall of the second groove. The inner side of the L-shaped block away from the rotating rod abuts against the side of the stop block away from the rotating rod. The upper ends of both rotating rods extend to the upper side of the second connecting ring. A second limiting mechanism restricting the rotation of the rotating rods on both sides is provided on the upper surface of the second connecting ring.

[0008] Preferably, the second limiting mechanism includes a first bevel gear and a second bevel gear. Side plates are fixedly provided on both sides of the upper surface of the second connecting ring. A crossbar is rotatably provided between the two side plates. The upper end of the crossbar is fixedly sleeved with the first bevel gear. The two ends of the crossbar are fixedly sleeved with the second bevel gear. The first bevel gear meshes with the corresponding second bevel gear. A fixed shell is fixedly provided in the middle of the upper surface of the second connecting ring. A slider is slidably provided inside the fixed shell. A limiting rod is fixedly provided on the upper side of the slider. A limiting hole is opened in the middle of the crossbar. The upper end of the limiting rod extends to the outside of the fixed shell and is inserted into the limiting hole.

[0009] Preferably, a spring is fixedly provided on the lower side of the slider, and the other end of the spring is fixedly connected to the inner wall of the fixed shell.

[0010] Preferably, slide rods are fixedly provided on both sides of the interior of the fixed shell, and the two ends of the slider are respectively movably connected to the corresponding slide rods.

[0011] Preferably, a sealing gasket is provided on the side of the first connecting ring and the second connecting ring that are close to each other.

[0012] The technical effects and advantages provided by this utility model in the above technical solution are as follows:

[0013] 1. In this utility model, the initial connection between the first and second air ducts is completed by inserting the plug rod into the plug hole. At this time, the first and second connecting rings are limited in the up, down, left and right directions. Then, the rotating rod is rotated so that the L-shaped block is engaged with the side of the stop block away from the rotating rod. At this time, the front and back directions of the first and second connecting rings are limited, thus completing the all-round limiting connection of the first and second air ducts.

[0014] 2. In this utility model, the spring force pushes the slider upward, causing the limiting rod to insert into the limiting hole at the middle end of the crossbar, preventing the crossbar from rotating. This, in turn, restricts the rotation of the first bevel gear by the second bevel gear, thus preventing the rotating rod from rotating and maintaining a stable connection between the first connecting ring and the second connecting ring.

[0015] 3. In this utility model, by pressing down the slider, the limiting rod is made to leave the limiting hole at the middle end of the crossbar, and the crossbar can be rotated. Through the transmission of the first bevel gear and the second bevel gear, the rotating rod is rotated, which in turn drives the L-shaped block to rotate and separate from the corresponding stop block. That is, the limitation on the front and rear directions of the first connecting ring and the second connecting ring is released, and the first air duct and the second air duct can be pulled apart to complete the disassembly of the first air duct and the second air duct. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0017] Figure 1 This is a schematic diagram of a quick-connect structure for laboratory ventilation ducts proposed in this utility model;

[0018] Figure 2 for Figure 1 Another structural diagram from a different perspective;

[0019] Figure 3 for Figure 2 A magnified schematic diagram of part A in the middle section.

[0020] Explanation of reference numerals in the attached figures:

[0021] 1. First air duct; 2. Second air duct; 3. First connecting ring; 4. Second connecting ring; 5. Stop block; 6. Rotating rod; 7. L-shaped block; 8. First bevel gear; 9. Side plate; 10. Crossbar; 11. Second bevel gear; 12. Fixed shell; 13. Limiting rod; 14. Insert rod; 15. Sliding block; 16. Sliding rod; 17. Spring. Detailed Implementation

[0022] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0023] This utility model discloses a quick connection structure for laboratory ventilation ducts.

[0024] Reference Figure 1-3 A quick-connect structure for laboratory ventilation ducts includes a first duct 1 and a second duct 2, arranged sequentially from left to right. A first connecting ring 3 and a second connecting ring 4 are fixedly connected to the adjacent ends of the first duct 1 and the second duct 2, respectively. Sealing gaskets are provided on the adjacent sides of both the first connecting ring 3 and the second connecting ring 4 to improve the sealing between them. Two insert rods 14 are fixedly provided on the side of the first connecting ring 3 adjacent to the second connecting ring 4. Insertion holes are provided on the side of the second connecting ring 4 adjacent to the first connecting ring 3 and corresponding to the insert rods 14. The insert rods 14 are inserted into the corresponding insertion holes. First grooves are provided on both outer walls of the first connecting ring 3, and second grooves are provided on both outer walls of the second connecting ring 4. First limiting mechanisms are provided inside the first and second grooves to restrict the movement of the first connecting ring 3 relative to the second connecting ring 4.

[0025] Reference Figure 1-3 The first limiting mechanism includes an L-shaped block 7 and a stop block 5. The stop block 5 is fixedly disposed inside the first groove, and the L-shaped block 7 is disposed inside the second groove. One end of the L-shaped block 7 is fixedly sleeved with a rotating rod 6. Both ends of the rotating rod 6 are rotatably connected to the inner wall of the second groove. The inner side of the end of the L-shaped block 7 away from the rotating rod 6 abuts against the side of the stop block 5 away from the rotating rod 6. The upper ends of the two rotating rods 6 extend to the upper side of the second connecting ring 4. The upper surface of the second connecting ring 4 is provided with a second limiting mechanism that restricts the rotation of the rotating rods 6 on both sides.

[0026] Reference Figure 1-3 The second limiting mechanism includes a first bevel gear 8 and a second bevel gear 11. Side plates 9 are fixedly mounted on both sides of the upper surface of the second connecting ring 4. A crossbar 10 is rotatably mounted between the two side plates 9. The upper end of the rotating rod 6 is fixedly sleeved with the first bevel gear 8, and both ends of the crossbar 10 are fixedly sleeved with the second bevel gear 11. The first bevel gear 8 meshes with the corresponding second bevel gear 11. A fixed housing 12 is fixedly mounted in the middle of the upper surface of the second connecting ring 4. A slider 15 is slidably mounted inside the fixed housing 12. A limiting rod 13 is fixedly installed on the upper side of the 5. A limiting hole is opened in the middle of the crossbar 10. The upper end of the limiting rod 13 extends to the outside of the fixed shell 12 and is inserted into the limiting hole. A spring 17 is fixedly installed on the lower side of the slider 15. The other end of the spring 17 is fixedly connected to the inner wall of the fixed shell 12 to facilitate the slider 15 to move up and reset. Slide rods 16 are fixedly installed on both sides of the interior of the fixed shell 12. The two ends of the slider 15 are respectively movably connected to the corresponding slide rods 16, so that the slider 15 can slide stably in the fixed shell 12.

[0027] In this utility model, when connecting the first air duct 1 and the second air duct 2, the insertion rod 14 on the first connecting ring 3 is aligned with the insertion hole of the second connecting ring 4 and inserted, so that the first connecting ring 3 and the second connecting ring 4 abut against each other, completing the initial positioning and restricting the movement of the two in the up, down and left and right directions. At this time, the slider 15 inside the fixed shell 12 is pressed down, the spring 17 is compressed, and the limiting rod 13 is withdrawn from the limiting hole of the crossbar 10, releasing the rotation restriction on the crossbar 10.

[0028] Rotating the crossbar 10 causes the second bevel gears 11 at both ends to drive the meshing first bevel gear 8 to rotate, thereby causing the rotating rod 6 and the L-shaped block 7 to rotate until the inner side of the L-shaped block 7 away from the rotating rod 6 abuts against the side of the stop block 5 away from the rotating rod 6, thus completing the front-back limit of the first connecting ring 3 and the second connecting ring 4. The slider 15 is released, the spring 17 returns to its original position and pushes the slider 15 upward. The limiting rod 13 is inserted into the limiting hole of the crossbar 10 to limit the rotation of the crossbar 10, thereby fixing the position of the L-shaped block 7 and realizing a stable connection between the first air duct 1 and the second air duct 2.

[0029] During disassembly, press down the slider 15 again to disengage the limiting rod 13 from the limiting hole, rotate the crossbar 10 in the opposite direction, and the L-shaped block 7 will rotate and separate from the stop block 5. Then the insertion rod 14 can be pulled out from the insertion hole to complete the separation of the two air ducts. The whole process does not require tools, is easy to operate, and can quickly realize the connection and disassembly of ventilation ducts. It is especially suitable for installation operations in small laboratory spaces.

[0030] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A quick connection structure of a laboratory ventilation duct, comprising a first duct (1) and a second duct (2), characterized in that, The first air duct (1) and the second air duct (2) are arranged sequentially from left to right. The first air duct (1) and the second air duct (2) are respectively fixedly connected to the ends of the first air duct (1) and the second air duct (2) that are close to each other. Two plug rods (14) are fixedly arranged on the side of the first connecting ring (3) that is close to the second connecting ring (4). The second connecting ring (4) has a plug hole on the side that is close to the first connecting ring (3) and at the position corresponding to the plug rod (14). The plug rod (14) is inserted into the corresponding plug hole. The outer walls on both sides of the first connecting ring (3) are provided with a first groove. The outer walls on both sides of the second connecting ring (4) are provided with a second groove. The first groove and the second groove are provided with a first limiting mechanism that restricts the movement of the first connecting ring (3) relative to the second connecting ring (4).

2. The laboratory fume duct quick connect structure of claim 1, wherein, The first limiting mechanism includes an L-shaped block (7) and a stop block (5). The stop block (5) is fixedly disposed inside the first groove. The L-shaped block (7) is disposed inside the second groove. One end of the L-shaped block (7) is fixedly sleeved with a rotating rod (6). Both ends of the rotating rod (6) are rotatably connected to the inner wall of the second groove. The inner side of the L-shaped block (7) away from the rotating rod (6) abuts against the side of the stop block (5) away from the rotating rod (6). The upper ends of the two rotating rods (6) extend to the upper side of the second connecting ring (4). The upper surface of the second connecting ring (4) is provided with a second limiting mechanism that restricts the rotation of the rotating rods (6) on both sides.

3. The laboratory fume duct quick connect structure of claim 2, wherein, The second limiting mechanism includes a first bevel gear (8) and a second bevel gear (11). Side plates (9) are fixedly provided on both sides of the upper surface of the second connecting ring (4). A crossbar (10) is rotatably provided between the two side plates (9). The upper end of the rotating rod (6) is fixedly sleeved with the first bevel gear (8). The two ends of the crossbar (10) are fixedly sleeved with the second bevel gear (11). The first bevel gear (8) meshes with the corresponding second bevel gear (11). A fixed shell (12) is fixedly provided in the middle of the upper surface of the second connecting ring (4). A slider (15) is slidably provided inside the fixed shell (12). A limiting rod (13) is fixedly provided on the upper side of the slider (15). A limiting hole is opened in the middle of the crossbar (10). The upper end of the limiting rod (13) extends to the outside of the fixed shell (12) and is inserted into the limiting hole.

4. The laboratory fume duct quick connect structure of claim 3, wherein, A spring (17) is fixedly installed on the lower side of the slider (15), and the other end of the spring (17) is fixedly connected to the inner wall of the fixed shell (12).

5. The laboratory fume duct quick connect structure of claim 3, wherein, Both sides of the interior of the fixed shell (12) are fixedly provided with slide rods (16), and the two ends of the slider (15) are respectively movably connected to the corresponding slide rods (16).

6. The laboratory fume duct quick connect structure of claim 1, wherein, A sealing gasket is provided on the side of the first connecting ring (3) and the second connecting ring (4) that are close to each other.

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