Adjustable limiting device for air pipe connection

Abstract

The utility model relates to the field of air pipe limiting devices, in particular to an adjustable limiting device for air pipe connection, which comprises a connecting flange. The limiting assembly comprises limiting sleeves located on the periphery of the surface of the connecting flange, the outer surface of each limiting sleeve is provided with two connecting blocks, one side of each connecting block is fixedly connected with a rack, the outer surface of each limiting sleeve is provided with a fixing block, and the fixing blocks and the connecting blocks are distributed in an axial symmetry mode. A moving groove is formed in the fixed block; a twisting rod is rotated to drive a gear to rotate, so that a rack and a limiting sleeve are driven to move, a limiting plate slides in the limiting sleeve while the limiting sleeve moves, so that the moving limiting sleeve is limited, the limiting sleeve is moved through cooperation of the gear and the rack, bolts are not needed, and operation is convenient. And the problem that the ventilation pipeline cannot be disassembled and repaired due to the fact that the bolt is rusted after being used for a long time and is difficult to loosen is solved.

Description

Technical Field

[0001] The utility model relates to the field of air duct limiting devices, in particular to an adjustable limiting device for air duct connection. Background Art

[0002] The ventilation duct is assembled by splicing many ventilation pipes, and the ventilation pipes are connected by connectors. In the connection of the air duct, the role of the limit device is to ensure that the air duct will not be excessively displaced or fall off at the connection due to external factors, thereby ensuring the normal operation of the air duct and the safety of the system.

[0003] After searching, the Chinese patent "A connection device for installing ventilation ducts" with the authorization announcement number "CN 219933271U" is found. This patented technology, through the design of the connection assembly, can adjust the specifications of the ventilation ducts by moving the connection blocks of the upper connection piece and the lower connection piece in the limit chamber when splicing and assembling ventilation ducts of different specifications. Then, after tightening and fixing the connection bolts at the top of the upper connection piece and the bottom of the lower connection piece, tighten or loosen the connection bolts on both sides through nuts, and fix the connecting flange between the first ventilation duct and the second ventilation duct in the limit grooves on the inner surfaces of the upper connection piece and the lower connection piece to complete the splicing and fixing between the two. This solves the problem that the traditional connection piece structure is fixed in the past and can only install ventilation ducts of the same specification, which is inefficient.

[0004] Although the patented technology solves the problem that the existing connecting piece structure is fixed and can only be used to install ventilation pipes of the same specification, which is inefficient, the patented technology uses a fixing method of bolts and nuts when connecting ventilation ducts, and the ventilation ducts need to be regularly dismantled and repaired in the later stage. At this time, the bolts will rust due to long-term use, and it is difficult to loosen the bolts, resulting in the inability to dismantle and repair the ventilation duct. Therefore, an adjustable limit device for duct connection is proposed to solve the above problem. Utility Model Content

[0005] The purpose of the utility model is to provide an adjustable limit device for connecting air ducts in order to solve the above-mentioned problem, thereby improving the problem that the bolts will rust due to long-term use, making it difficult to loosen the bolts, resulting in the inability to dismantle and repair the ventilation duct.

[0006] The utility model achieves the above-mentioned purpose through the following technical scheme: an adjustable limit device for connecting an air duct, comprising a connecting flange; a limit assembly, wherein the limit assembly comprises a limit sleeve located around the surface of the connecting flange, the outer surface of each of the limit sleeves is provided with two connecting blocks, one side of the connecting block is fixedly connected to a rack, the outer surface of each of the limit sleeves is provided with a fixed block axially symmetrically distributed with the connecting block, a movable groove is opened in the fixed block, a gear is embedded and installed in the fixed block, and a torsion rod is fixedly connected in the gear.

[0007] Preferably, the rack is slidably connected in the movable groove, the gear is meshing with the rack, and the top of the torsion rod is located above the fixed block. By using a wrench to rotate the torsion rod, the gear below can be driven to rotate, thereby driving the limit sleeve to move and limit the connecting flange to prevent the connecting flange from being displaced or falling off.

[0008] Preferably, a first ventilation pipe is arranged in the connecting flange, and a second ventilation pipe is arranged on one side of the first ventilation pipe through the connecting flange. The first ventilation pipe and the second ventilation pipe are connected through the connecting flange. Thereafter, the connecting flange is limited by a limiting assembly, thereby making the connection between the first ventilation pipe and the second ventilation pipe more stable.

[0009] Preferably, the limit sleeve is slidably connected to a limit plate, and a slot is provided in the limit plate. When the gear drives the rack to move, the limit plate will slide in the limit sleeve to achieve the purpose of limiting the limit sleeve and prevent the limit sleeve from being displaced during the movement.

[0010] Preferably, a first connecting plate is fixedly connected to the top of the limiting plate, and the first connecting plate is arranged corresponding to the rack. A slot is opened in the first connecting plate, and the first connecting plate is stuck on the surface of the rack. When the rack moves, the moving rack will drive the limiting plate to move through the first connecting plate and the second connecting plate, so that the rack and the limiting plate move at the same angle to prevent misalignment between the rack and the limiting plate.

[0011] Preferably, a second connecting plate is provided on one side of the first connecting plate, and a pin is fixedly connected to one side of the second connecting plate. When the second connecting plate is in contact with the first connecting plate, the pin on one side of the second connecting plate will be inserted into the slot of the first connecting plate, thereby fixing the first connecting plate and the second connecting plate together.

[0012] Preferably, the latch is slidably connected in the slot, and a spring limiting column is provided in the latch. The latch can be inserted into the slot by pressing the spring limiting column into the latch. The length of the latch is greater than the length of the slot, so that the spring limiting column in the latch can exceed the length of the slot. Thereafter, the spring limiting column will pop out due to the elasticity of the spring, thereby preventing the latch from detaching from the slot.

[0013] Preferably, a clamping block is fixedly connected to the bottom of the second connecting plate, and the clamping block is slidably connected in the clamping groove, which can limit the second connecting plate to prevent the second connecting plate from detaching from above the limiting plate.

[0014] The beneficial effects of the utility model are:

[0015] 1. The gear is driven to rotate by rotating the torsion rod, thereby driving the rack and the limit sleeve to move. When the limit sleeve moves, the limit plate will slide in the limit sleeve, thereby limiting the moving limit sleeve. The limit sleeve is moved by the cooperation of the gear and the rack, and no bolts are needed. This improves the problem that the bolts will rust due to long-term use, making it difficult to loosen the bolts, resulting in the inability to dismantle and repair the ventilation duct;

[0016] 2. By setting a spring limit column and pressing the spring limit column into the latch, the latch can be inserted into the slot. When the spring limit column exceeds the stroke of the slot, the spring limit column will pop out due to the elasticity of the spring, thereby preventing the latch from detaching from the slot. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the utility model;

[0018] Figure 2 It is an explosion diagram of the utility model;

[0019] Figure 3 It is a structural schematic diagram of the limit assembly of the utility model;

[0020] Figure 4 It is a cross-sectional schematic diagram of the fixing block of the utility model;

[0021] Figure 5 for Figure 4 A is an enlarged view of the middle image.

[0022] In the figure: 1. connecting flange; 2. limiting assembly; 21. limiting sleeve; 22. connecting block; 23. rack; 24. fixing block; 241. movable groove; 25. gear; 26. torsion rod; 3. first ventilation duct; 4. second ventilation duct; 5. limiting plate; 51. slot; 52. first connecting plate; 521. slot; 53. second connecting plate; 54. latch; 55. spring limiting column; 56. block. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] When implementing: Figure 1-5 As shown, an adjustable limit device for connecting an air duct comprises a connecting flange 1; a limit assembly 2, the limit assembly 2 comprises a limit sleeve 21 located around the surface of the connecting flange 1, the outer surface of each limit sleeve 21 is provided with two connecting blocks 22, one side of the connecting block 22 is fixedly connected with a rack 23, the outer surface of each limit sleeve 21 is provided with a fixed block 24 axially symmetrically distributed with the connecting block 22, a movable groove 241 is opened in the fixed block 24, a gear 25 is embedded and installed in the fixed block 24, and a torsion rod 26 is fixedly connected in the gear 25.

[0025] like Figure 3 and Figure 4 As shown, the rack 23 is slidably connected in the movable groove 241, the gear 25 is meshed with the rack 23, and the top of the torsion rod 26 is located above the fixed block 24. When the limiting sleeve 21 needs to be moved, the gear 25 is driven to rotate by rotating the torsion rod 26, thereby driving the rack 23 to move. The moving rack 23 will drive the limiting sleeve 21 to move through the connecting block 22, so that the limiting sleeve 21 can adapt to ventilation pipes of different sizes.

[0026] like Figure 1 and Figure 2 As shown, a first ventilation pipe 3 is arranged in the connecting flange 1 , and a second ventilation pipe 4 is arranged on one side of the first ventilation pipe 3 through the connecting flange 1 .

[0027] like Figure 2 , Figure 3 , Figure 4 and Figure 5As shown, the limiting sleeve 21 is slidably connected with the limiting plate 5, and a slot 51 is provided in the limiting plate 5, and a first connecting plate 52 is fixedly connected to the top of the limiting plate 5, and the first connecting plate 52 is arranged corresponding to the rack 23, and a slot 521 is provided in the first connecting plate 52, and a second connecting plate 53 is provided on one side of the first connecting plate 52, and a latch 54 is fixedly connected to one side of the second connecting plate 53, and the latch 54 is slidably connected in the slot 521, and a spring limiting column 55 is provided in the latch 54, and a block 56 is fixedly connected to the bottom of the second connecting plate 53, and the block 56 is slidably connected in the slot 51. When the limiting plate 5 is inserted into the limiting sleeve 21, the first connecting plate 52 will be stuck on the surface of the rack 23, and then, the spring limiting column 55 in the latch 54 is pressed, and the latch 54 is inserted into the slot 521, and at the same time, the block 56 will be stuck in the slot 51, so as to fix the second connecting plate 53 and the first connecting plate 52 together.

[0028] When the utility model is in use, the limit plate 5 is inserted into the limit sleeve 21, and then the first connecting plate 52 and the second connecting plate 53 are fixed together. Then, the gear 25 is driven to rotate by rotating the torsion rod 26, thereby driving the rack 23 and the limit sleeve 21 to move. When the limit sleeve 21 moves, the limit plate 5 will slide in the limit sleeve 21, thereby limiting the moving limit sleeve 21. The limit sleeve 21 is moved by the cooperation of the gear 25 and the rack 23, and there is no need to use bolts to prevent the bolts from rusting, which makes it impossible to dismantle and repair the ventilation duct.

[0029] It should be noted that the connecting flange 1, rack 23, gear 25 and spring limit column 55 in the above description are all relatively mature devices in the existing technology. The specific models can be selected according to actual needs and will not be described in detail here.

[0030] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. An adjustable limiter for connecting an air duct, characterized in that: include: Connecting flange (1); A limit assembly (2), the limit assembly (2) comprising a limit sleeve (21) located around the surface of the connecting flange (1), the outer surface of each limit sleeve (21) being provided with two connecting blocks (22), one side of the connecting block (22) being fixedly connected with a rack (23), the outer surface of each limit sleeve (21) being provided with a fixed block (24) axially symmetrically distributed with the connecting block (22), a movable groove (241) being provided in the fixed block (24), a gear (25) being embedded and installed in the fixed block (24), and a torsion rod (26) being fixedly connected in the gear (25).

2. The adjustable limit device for connecting an air duct according to claim 1, characterized in that: The rack (23) is slidably connected in the movable groove (241), the gear (25) is meshed with the rack (23), and the top of the torsion rod (26) is located above the fixed block (24).

3. The adjustable limit device for connecting an air duct according to claim 1, characterized in that: A first ventilation pipe (3) is arranged inside the connecting flange (1), and a second ventilation pipe (4) is arranged on one side of the first ventilation pipe (3) via the connecting flange (1).

4. The adjustable limit device for connecting an air duct according to claim 1, characterized in that: The limiting sleeve (21) is slidably connected to a limiting plate (5), and a clamping groove (51) is provided in the limiting plate (5).

5. The adjustable limit device for connecting an air duct according to claim 4, characterized in that: A first connecting plate (52) is fixedly connected to the top of the limiting plate (5); the first connecting plate (52) is arranged corresponding to the rack (23); and a slot (521) is provided in the first connecting plate (52).

6. The adjustable limit device for connecting an air duct according to claim 5, characterized in that: A second connecting plate (53) is provided on one side of the first connecting plate (52), and a latch (54) is fixedly connected to one side of the second connecting plate (53).

7. The adjustable limit device for connecting an air duct according to claim 6, characterized in that: The latch (54) is slidably connected in the slot (521), and a spring limiting column (55) is arranged in the latch (54).

8. The adjustable limit device for connecting an air duct according to claim 6, characterized in that: A clamping block (56) is fixedly connected to the bottom of the second connecting plate (53), and the clamping block (56) is slidably connected in the clamping slot (51).

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