Improved inserting strip type rectangular air pipe connecting structure

Abstract

The utility model relates to the technical field of air pipe connection, in particular to an improved inserting strip type rectangular air pipe connection structure which comprises rectangular air pipes, clamping grooves, clamping blocks and inserting strips, the section of each rectangular air pipe is of a square-frame-shaped structure, the clamping grooves are formed in the connecting positions of every two adjacent rectangular air pipes, the clamping blocks are of an L-shaped structure, and the inserting strips are arranged in the clamping grooves. The bottom end of the clamping block is connected with the end wall of the clamping groove, a gap for the inserting strip to be inserted is formed between the top end of the clamping block and the surface of the rectangular air pipe, the inserting strip is of a long-strip-shaped structure, and the two ends of the inserting strip are provided with bent sections for being inserted into the gap. The clamping grooves used for being connected with the clamping blocks are formed in the connecting positions of the adjacent rectangular air pipes, and the gaps allowing the bent sections at the two ends of the inserting strips to be inserted are formed between the top ends of the clamping blocks and the surfaces of the rectangular air pipes, so that the two adjacent rectangular air pipes are connected, the connecting process is simple and rapid, auxiliary tools are not needed, labor intensity is reduced, and the working efficiency is improved. And the working efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of duct connection technology, and in particular to an improved insert-type rectangular duct connection structure. Background Technology

[0002] Traditional rectangular duct connections often use flanges or bolts, which are cumbersome, time-consuming, and require auxiliary tools. While some existing technologies offer insert-type connections, these have the following drawbacks: insufficient sealing, potentially leading to air leakage; low connection stability, making them susceptible to loosening due to vibration; and cumbersome connection and disassembly processes, especially inconvenient in confined spaces.

[0003] Based on the above problems, this utility model proposes an improved insert-type rectangular duct connection structure. Utility Model Content

[0004] The purpose of this utility model is to overcome the shortcomings of the prior art and provide an improved insert-type rectangular duct connection structure. By setting a slot for connecting the snap-fit ​​block at the connection point of adjacent rectangular ducts, a gap is formed between the top of the snap-fit ​​block and the surface of the rectangular duct for inserting the bent sections at both ends of the insert, thereby realizing the connection of two adjacent rectangular ducts. The connection process is simple and quick, requires no auxiliary tools, reduces labor intensity, and improves work efficiency.

[0005] To achieve the objective of this utility model, the technical solution adopted by this utility model is as follows:

[0006] This utility model discloses an improved insert-type rectangular duct connection structure, including a rectangular duct, a slot, a snap-fit ​​block, and an insert. The rectangular duct has a square cross-section. The slot is provided at the connection point of two adjacent rectangular ducts. The snap-fit ​​block has an "L" shape. The bottom end of the snap-fit ​​block is connected to the end wall of the slot. A gap is provided between the top end of the snap-fit ​​block and the surface of the rectangular duct for inserting the insert. The insert has a long strip structure with bent sections at both ends for inserting into the gap.

[0007] The snap-fit ​​block includes a semi-circular segment and a horizontal segment. The bottom end of the semi-circular segment is connected to the end wall of the slot, and the top end of the semi-circular segment is connected to one end of the horizontal segment. The horizontal segment forms the gap with the surface of the rectangular duct. When the ends of adjacent rectangular ducts are connected, the two snap-fit ​​blocks are mirror images of each other, and the outwardly protruding parts of the two semi-circular segments can contact each other.

[0008] The insert includes a top horizontal section, an arc section, and a bent section. The top ends of the two arc sections are connected to the two ends of the top horizontal section, and the outer ends of the two bent sections are connected to the bottom ends of the two arc sections. The bent sections are arranged parallel to the top horizontal section, and the distance between them is equal to the thickness of the horizontal section.

[0009] The inner wall of the arc segment is fixed with a rubber sealing gasket that can be pressed tightly against the end of the horizontal segment.

[0010] The outer corners of the front ends of the horizontal sections on both sides are bent upward to form a limiting angle, and the rear end of the limiting angle can be in close contact with the front end of the top horizontal section; a limiting hole is provided in the middle of the rear end of the horizontal section, and a quick-locking mechanism is provided at the top of the rear end of the top horizontal section that can match and engage with the limiting hole.

[0011] The quick-connect mechanism includes a fixed base, a connecting rod, a limiting rod, a compression spring, a limiting ring, and a fixed shaft. The fixed base has a cylindrical structure with an axially provided sliding hole for the limiting rod to slide. The limiting ring is fixed to the outer end of the inner wall of the sliding hole. The outer diameter of the connecting rod is equal to the inner diameter of the limiting ring. The inner end of the connecting rod is connected to the limiting rod, and the outer end of the connecting rod is connected to the fixed shaft. The compression spring is fitted onto the outside of the connecting rod. The end of the limiting rod is a wedge-shaped part with a right-angled triangle cross-section, which can be inserted into the limiting hole to match and engage.

[0012] The fixed base is provided with a lever on the outside. The lever has shaft holes in the middle of its two side walls for the fixed shaft to pass through. The lever has a rectangular groove for the lever to rotate on its lower left side. The shaft hole is located at the upper right corner of the groove. The difference between the length and width of the groove is equal to the height of the wedge-shaped part.

[0013] The lower left corner of the lever is chamfered; a square assist block is connected to the upper right side wall of the lever, and the lower right corner of the assist block is rounded.

[0014] The beneficial effects of this utility model are as follows:

[0015] This invention achieves the connection of two adjacent rectangular ducts by setting a slot for connecting a snap-fit ​​block at the connection point of adjacent rectangular ducts. A gap is formed between the top of the snap-fit ​​block and the surface of the rectangular duct, allowing the insertion of the bent sections at both ends of the insert. The connection process is simple and quick, requires no auxiliary tools, reduces labor intensity, and improves work efficiency. Attached Figure Description

[0016] Figure 1 This is a partial structural schematic diagram of Embodiment 1;

[0017] Figure 2 This is a partial structural cross-sectional schematic diagram of Embodiment 1;

[0018] Figure 3 This is a partial structural schematic diagram of Example 2;

[0019] Figure 4 This is a partial structural cross-sectional schematic diagram of Example 2.

[0020] In the diagram, 1 is a rectangular duct, 2 is a slot, 3 is a snap-fit ​​block, 4 is a strip, 5 is a gap, 6 is a bending section, 7 is a quick snap-fit ​​mechanism, 31 is a semi-circular section, 32 is a horizontal section, 33 is a limiting angle, 34 is a limiting hole, 41 is a top horizontal section, and 42 is an arc section. Detailed Implementation

[0021] The present invention will be further described below:

[0022] Please see Figure 1-4 ,

[0023] Example 1: This example discloses an improved insert-type rectangular duct connection structure, including a rectangular duct 1, a slot 2, a snap-fit ​​block 3, and a snap-fit ​​strip 4. The rectangular duct 1 has a square cross-section. The slot 2 is provided at the connection point of two adjacent rectangular ducts 1. The snap-fit ​​block 3 has an "L" shape. The bottom end of the snap-fit ​​block 3 is connected to the end wall of the slot 2. A gap 5 for inserting the snap-fit ​​strip 4 is provided between the top end of the snap-fit ​​block 3 and the surface of the rectangular duct 1. The snap-fit ​​strip 4 has a long strip structure with bent sections 6 at both ends for inserting into the gap 5. This invention achieves the connection of two adjacent rectangular ducts 1 by providing a slot 2 for connecting the snap-fit ​​block 3 at the connection point of adjacent rectangular ducts 1, and forming a gap 5 between the top end of the snap-fit ​​block 3 and the surface of the rectangular duct 1 for inserting the bent sections 6 at both ends of the snap-fit ​​strip 4. The connection process is simple and quick, requires no auxiliary tools, reduces labor intensity, and improves work efficiency.

[0024] Furthermore, the snap-fit ​​block 3 includes a semi-circular ring segment 31 and a horizontal segment 32. The bottom end of the semi-circular ring segment 31 is connected to the end wall of the slot 2, and the top end of the semi-circular ring segment 31 is connected to one end of the horizontal segment 32. The horizontal segment 32 forms a gap 5 with the surface of the rectangular duct 1. When the ends of adjacent rectangular ducts 1 are connected, the two snap-fit ​​blocks 3 are arranged in a mirror image. The outwardly protruding parts of the two semi-circular ring segments 31 can contact each other. The gap 5 formed between the horizontal segment 32 and the surface of the rectangular duct 1 facilitates engagement with the insert 4. The outwardly protruding parts of the two semi-circular ring segments 31 can be tightly contacted, ensuring that the rectangular ducts 1 can remain sealed after connection. Preferably, the cross-sectional width of the semi-circular ring segment 31 is slightly larger than the width of the slot 2, so that when the snap-fit ​​block 3 engages with the insert 4, the protruding parts of the semi-circular ring segments 31 on both sides can be squeezed to ensure the sealing of the connection between the two.

[0025] Furthermore, the insert 4 includes a top horizontal section 41, an arc section 42, and a bent section 6. The top ends of the arc sections 42 on both sides are connected to the two ends of the top horizontal section 41, and the outer ends of the two bent sections 6 are connected to the bottom ends of the arc sections 42 on both sides. The bent sections 6 are arranged parallel to the top horizontal section 41, and the distance between them is equal to the thickness of the horizontal section 32. This ensures that after the bent section 6 of the insert 4 is inserted into the gap 5, the lower surface of its top horizontal section 41 contacts the upper surface of the horizontal section 32, and the upper surface of the bent section 6 contacts the lower surface of the horizontal section 32. This makes it difficult for the two to separate during use after they are engaged.

[0026] Furthermore, the inner wall of the arc segment 42 is fixed with a rubber sealing gasket that can press tightly against the end of the horizontal segment 32 to ensure sealing and make the engagement between the insert 4 and the snap-fit ​​block 3 more tight, preventing them from separating.

[0027] Example 2: The similarities between this example and Example 1 will not be repeated. The difference is that the outer corners of the front ends of the horizontal sections 32 on both sides are bent upwards to form limiting angles 33. The rear end of the limiting angles 33 can be tightly contacted with the front end of the top horizontal section 41. A limiting hole 34 is provided in the middle of the rear end of the horizontal section 32. A quick-connecting mechanism 7 is provided at the top of the rear end of the top horizontal section 41, which can match and engage with the limiting hole 34. By bending the outer corners of the front ends of the horizontal section 32 upwards to form limiting angles 33, the rear end of the limiting angles 33 can be tightly contacted with the front end of the top horizontal section 41, thereby limiting the front end of the top horizontal section 41 and playing a positioning role. By setting the quick-connecting mechanism 7 at the rear end of the top horizontal section 41, it can engage with the limiting hole 34 in the middle of the rear end of the horizontal section 32, which can play a limiting role and ensure that the rectangular duct 1 will not detach during use. Moreover, the quick-connecting mechanism 7 is quick and convenient to engage and disengage without increasing the workload.

[0028] Furthermore, the quick-connect mechanism 7 includes a fixed base 71, a connecting rod 72, a limiting rod 73, a compression spring 82, a limiting ring 74, and a fixed shaft 75. The fixed base 71 has a cylindrical structure and is axially provided with a sliding hole 77 for sliding the limiting rod 73. The limiting ring 74 is fixed to the outer end of the inner wall of the sliding hole 77. The outer diameter of the connecting rod 72 is equal to the inner diameter of the limiting ring 74. The inner end of the connecting rod 72 is connected to the limiting rod 73, and the outer end of the connecting rod 72 is connected to the fixed shaft 75. The compression spring 82 is fitted onto the outside of the connecting rod 72. The limiting rod... The end of 73 is a wedge-shaped part 79 with a right-angled triangle cross section. The wedge-shaped part 79 can be inserted into the limiting hole 34 and matched and engaged. The limiting rod 73 can slide along the sliding hole 77 along the axis of the fixed base 71 and can be inserted into the limiting hole 34 to complete the engagement, thereby limiting the displacement of the insert 4 and ensuring that the insert 4 and the snap-fit ​​block 3 will not disengage during use. When disassembling, pulling the fixed shaft 75 outward will pull out the connecting rod 72 and the limiting rod 73 connected to it, thereby unlocking from the limiting hole 34. At this time, pulling the insert 4 out to the rear end can complete the disassembly of the two rectangular air ducts 1.

[0029] Furthermore, a lever 76 is provided on the outer side of the fixed base 71. The lever 76 has shaft holes in the middle of its two side walls for the fixed shaft 75 to pass through. A rectangular sliding groove 78 for the lever 76 to rotate is provided on the lower left side of the lever 76. The shaft hole is located at the upper right corner of the sliding groove 78. The difference between the longitudinal section length and width of the sliding groove 78 is equal to the height of the wedge-shaped part 79.

[0030] Working process: By providing shaft holes on both side walls of the lever 76 for the fixed shaft 75 to pass through, the lever 76 can rotate around the fixed shaft 75. Since the difference between the longitudinal section length and width of the groove 78 is equal to the height of the wedge-shaped part 79, and the difference between the distance from the fixed shaft 75 to the right end face of the lever and the distance from the fixed shaft 75 to the bottom of the lever is equal to the height of the wedge-shaped part, when the user rotates the lever 76 from horizontal to vertical, the wedge-shaped part 79 inserted in the limiting hole 34 can be pulled outwards, completing the operation. Unlocking; When the insert 4 needs to engage with the locking block 3, the lever 76 is moved to the horizontal position in the unlocked state, and the insert 4 moves from the rear to the direction of the limiting hole 34. The inclined side of the wedge-shaped part 79 contacts the rear end of the horizontal section 32. The pressure acting on the inclined surface will generate a partial force to push the wedge-shaped part 79 outward. At this time, the wedge-shaped part 79 can slide along the rear end wall of the horizontal section 32 until the wedge-shaped part 79 moves to the outside of the limiting hole 34. Due to the reset action of the compression spring 82, the wedge-shaped part 79 is inserted into the limiting hole 34 to complete the engagement.

[0031] Furthermore, the lower left corner of the lever 76 forms a chamfered right angle 80, which facilitates the lever 76 to rotate from the horizontal to the vertical position, so that the wedge-shaped part 79 can be pushed out of the limiting hole 34 to complete the unlocking; a square assist block 81 is connected to the upper right side wall of the lever 76, and the lower right corner of the assist block 81 forms a rounded corner, which facilitates the user to push the lever 76 outward to rotate it 90° to the vertical position.

[0032] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent modifications made based on the content of this utility model specification and drawings, or direct or indirect applications in related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. An improved rectangular duct connection structure of the splicing type, characterized by: Including rectangular air pipe (1), clamping groove (2), clamping block (3) and insert strip (4), The cross section of the rectangular air pipe (1) is a square box structure, the connecting part of two adjacent rectangular air pipes (1) is provided with the clamping groove (2), the clamping block (3) is in the shape of L, the bottom end of the clamping block (3) is connected with the end wall of the clamping groove (2), the top end of the clamping block (3) and the surface of the rectangular air pipe (1) are provided with a gap (5) for inserting the insert strip (4), the insert strip (4) is in the shape of a long strip, and both ends of the insert strip (4) are provided with a bending section (6) for inserting the gap (5).

2. The improved rectangular duct connection structure of claim 1, wherein: The clamping block (3) comprises a semicircular ring section (31) and a horizontal section (32), the bottom end of the semicircular ring section (31) is connected with the end wall of the clamping groove (2), the top end of the semicircular ring section (31) is connected with one end of the horizontal section (32), and the horizontal section (32) and the surface of the rectangular air pipe (1) form the gap (5); when the end portions of adjacent rectangular air pipes (1) are connected, the two clamping blocks (3) are mirror image arranged, and the outward protruding portions of the two semicircular ring sections (31) can be contacted.

3. The improved rectangular duct connection structure of claim 2, wherein: The insert strip (4) comprises a top horizontal section (41), a circular arc section (42) and a bending section (6), the top ends of the two circular arc sections (42) are connected with the two ends of the top horizontal section (41) respectively, the outer ends of the two bending sections (6) are connected with the bottom ends of the two circular arc sections (42) respectively, the bending section (6) is arranged in parallel with the top horizontal section (41), and the distance between the bending section (6) and the top horizontal section (41) is equal to the thickness of the horizontal section (32).

4. The improved rectangular duct connection structure of claim 3, wherein: The inner wall of the circular arc section (42) is fixed with a rubber sealing gasket capable of abutting against the end portion of the horizontal section (32).

5. The improved rectangular duct connection structure of claim 4, wherein: The front end outer side corners of the two horizontal sections (32) are bent upward to form limiting corners (33), the rear end of the limiting corner (33) can abut against and contact the front end of the top horizontal section (41); the rear end of the horizontal section (32) is provided with a limiting hole (34), and the rear end of the top horizontal section (41) is provided with a quick clamping mechanism (7) capable of being matched and clamped with the limiting hole (34).

6. The improved rectangular duct connection structure of claim 5, wherein: The quick clamping mechanism (7) comprises a fixed seat (71), a connecting rod (72), a limiting rod (73), a compression spring (82), a limiting ring (74) and a fixed shaft (75), the fixed seat (71) is in the shape of a cylinder, an axial sliding hole (77) for sliding of the limiting rod (73) is formed in the fixed seat (71), the inner wall outer end of the sliding hole (77) is fixed with the limiting ring (74), the outer diameter of the connecting rod (72) is equal to the inner diameter of the limiting ring (74), the inner end of the connecting rod (72) is connected with the limiting rod (73), the outer end of the connecting rod (72) is connected with the fixed shaft (75), the connecting rod (72) is externally sleeved with the compression spring (82), and the end portion of the limiting rod (73) is in the shape of a wedge (79) with a right-angled triangle in longitudinal section, and the wedge (79) can be inserted into the limiting hole (34) and matched and clamped with the limiting hole (34).

7. The improved rectangular duct connection structure of claim 6, wherein: The fixed seat (71) is externally provided with a pushing block (76), the middle part of the two side walls of the pushing block (76) is provided with an axle hole for the fixed axle (75) to pass through, the lower left of the pushing block (76) is provided with a rectangular chute (78) for the pushing block (76) to rotate, the axle hole is arranged at the upper right corner of the chute (78), and the difference between the length and the width of the longitudinal section of the chute (78) is equal to the height of the wedge-shaped part (79).

8. The improved rectangular duct connection structure of claim 7, wherein: The lower left corner of the pushing block (76) forms an inverted right angle (80), and the upper right side wall of the pushing block (76) is connected with a square power assisting block (81), and the lower right corner of the power assisting block (81) forms an inverted round corner.

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