Adjusting type limiting assembly for building ventilation pipe and building ventilation pipe

Abstract

The utility model relates to the field of air pipe limiting devices, in particular to an adjustable limiting assembly for a building ventilation pipe, which comprises a main rib, two groups of threaded holes formed in the top of the main rib are respectively in threaded connection with a group of threaded fixing pieces I, and the inner sides of the two groups of threaded fixing pieces I are respectively in threaded connection with a group of screw rods I; the bottoms of the two first screw rods are connected with top sleeves, the two first screw rods slidably penetrate through the inner side of the main rib, the main rib is rotationally connected with a two-way screw rod through a bearing, the two-way screw rod is in threaded connection with two moving blocks, and the two moving blocks are connected with a limiting assembly through four lock catches. According to the air pipe, when the air pipe is maintained in the later period, the whole limiting assembly can slide downwards only by separating the movable parts and the fixed parts of the four sets of lock catches, so that the air pipe can be directly detached for maintenance, and the detaching steps are simple and convenient.

Description

Technical Field

[0001] This utility model relates to the field of duct limiting devices, specifically an adjustable limiting component for building ventilation ducts. Background Technology

[0002] The duct system in commercial complexes and residential basements is usually part of the ventilation and air conditioning system, mainly used to regulate air circulation and temperature. Basement ventilation ducts are assembled from many duct sections, which are connected by connectors. In the connection of duct sections, the role of the limiting device is to ensure that the duct will not be excessively displaced or fall off due to external factors at the connection point, thereby ensuring the normal operation of the duct and the safety of the system.

[0003] Existing duct limiting devices, such as the adjustable limiting device for duct connections provided by CN222316245U, do not require bolts for fixing during use. Instead, they use spring limiting posts for limiting. However, when the duct needs to be maintained later, multiple sets of spring limiting posts must be twisted first, and then four sets of torsion rods are rotated to make the gears rotate. The rotation of the gears drives the rack to move, thereby completing the disassembly. However, the disassembly and assembly process is cumbersome. Therefore, we propose an adjustable limiting component for building ventilation ducts. Utility Model Content

[0004] To solve the above problems, this utility model provides the following solution:

[0005] An adjustable limiting component for building ventilation ducts includes a main rib. Two sets of threaded holes at the top of the main rib are threadedly connected to a set of threaded fasteners. The inner sides of the two sets of threaded fasteners are threadedly connected to a set of screws. The bottom of the two sets of screws is connected to a top sleeve. The two sets of screws slide through the inner side of the main rib. A bidirectional screw is rotatably connected to the main rib via a bearing. The bidirectional screw is threadedly connected to two sets of moving blocks. The two sets of moving blocks are connected to the limiting component via four sets of latches.

[0006] In some preferred embodiments, the limiting component includes two sets of side sleeves, which are respectively installed on the top of the first base plate and the second base plate. Two sets of screw rods are slidably passed through the inner side of the second base plate, and both sets of screw rods are connected to the first base plate. The two sets of screw rods are respectively threaded to the inner side of two sets of threaded fasteners, and the outer side of the two sets of threaded fasteners are respectively threaded to two sets of threaded holes opened on the second base plate.

[0007] In some preferred embodiments, the fixed portion of the latch is mounted on the outer wall of the two sets of movable blocks, and the movable portion of the latch is mounted on the outer wall of the two sets of side sleeves.

[0008] In some preferred embodiments, the bidirectional lead screw is threaded to the inner side of the threaded fastener, the outer side of the threaded fastener is threaded to the threaded hole on the side of the main rib, and one end of the bidirectional lead screw is connected to a crank handle.

[0009] In some preferred embodiments, the limiting groove sliding connection flange provided on the inner side of the side sleeve has an L-slot, and the flange is installed at both ends of the air duct; the flange is fixedly installed at the end of the air duct for docking with the flanges of other air ducts.

[0010] In some preferred embodiments, four sets of mounting components are installed on the top of the main rib, and the four sets of mounting components are provided with mounting holes.

[0011] In some preferred embodiments, both sets of movable blocks have connecting grooves at their bottoms, and both sets of connecting grooves match the shape of the top of the side sleeve.

[0012] In some preferred embodiments, two sets of guide support rods are slidably passed through the inner sides of the two sets of movable blocks, and all four sets of guide support rods are connected to the groove wall of the main reinforcement with an installation groove.

[0013] Building ventilation ducts include several ducts and the aforementioned adjustable limiting components for building ventilation ducts, with adjacent ends of two adjacent ducts connected and fixed by the same adjustable limiting component for building ventilation ducts.

[0014] In some preferred examples, the connecting flanges at the adjacent ends of two adjacent air ducts are connected and locked by embedding side sleeves.

[0015] Compared with the prior art, in this disclosure:

[0016] 1. When the duct needs to be repaired, simply separate the movable and fixed parts of the four sets of locking clips, and the entire limiting assembly can be slid down to directly remove the duct for repair. The disassembly process is simple and convenient.

[0017] 2. The two sets of side sleeves in the limiting assembly can slide to fit flanges of different sizes. The crank can be manually turned to drive the bidirectional screw to rotate. The rotation of the bidirectional screw will cause the two sets of moving blocks to move closer or further apart, so that the positions of the two sets of moving blocks can match the two sets of side sleeves. At this time, the limiting assembly and the two sets of moving blocks can be fixed together by four sets of latches. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 A schematic diagram of the main reinforcement and other structural components;

[0020] Figure 3 for Figure 2 Another structural diagram;

[0021] Figure 4 This is a schematic diagram of the limit component structure;

[0022] Figure 5 A schematic diagram of the structure of the flange, L-slot, and ductwork;

[0023] Figure 6 This is a schematic diagram of the structure after the limit components are installed.

[0024] In the picture:

[0025] 1. Main rib; 2. Threaded fastener one; 3. Screw one; 4. Top sleeve; 5. Two-way screw; 6. Moving block; 7. Lock; 8. Limiting assembly; 801. Side sleeve; 802. Base plate one; 803. Base plate two; 804. Screw two; 805. Threaded fastener two; 9. Threaded fastener three; 10. Handle; 11. Flange; 12. L-slot; 13. Air duct; 14. Mounting parts; 15. Connecting groove; 16. Guide support rod. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Reference Figures 1-6 This utility model relates to an adjustable limiting component for building ventilation pipes, comprising a main rib 1. Two sets of threaded holes at the top of the main rib 1 are threadedly connected to a set of threaded fasteners 2. The inner sides of the two sets of threaded fasteners 2 are threadedly connected to a set of screw rods 3. The bottom of the two sets of screw rods 3 are connected to top sleeves 4. The two sets of screw rods 3 movably penetrate the inner side of the main rib 1. A bidirectional lead screw 5 is rotatably connected to the main rib 1 via bearings. The bidirectional lead screw 5 is threadedly connected to two sets of moving blocks 6. The two sets of moving blocks 6 are connected to a limiting component 8 via four sets of latches 7.

[0028] Figure 1 The image shows a complete form of a building ventilation duct with duct 13, which can be continuously assembled to form a ventilation duct in actual use. To avoid problems such as rust on the threaded rods, rust-resistant materials are generally used.

[0029] For each of the above-mentioned components, at least the following solutions can be adopted, and any feature can be selected individually. For details not covered, please refer to the prior art or the structural features in the accompanying drawings:

[0030] The limiting component 8 includes two sets of side sleeves 801, which are respectively installed on the top of the first base plate 802 and the second base plate 803. Two sets of screws 804 are slidably and movably installed on the inner side of the second base plate 803. Both sets of screws 804 are connected to the first base plate 802. The two sets of screws 804 are threadedly connected to the inner side of two sets of threaded fasteners 805. The outer side of the two sets of threaded fasteners 805 can be threadedly connected to two sets of threaded holes opened on the second base plate 803. During installation, according to the size of the duct 13 (duct section) and the flange 11, the two sets of threaded fasteners 805 are rotated to disengage from the second base plate 803. By adjusting the distance between the two sets of side sleeves 801, and after the distance is adjusted, the two sets of threaded fasteners 805 are rotated again to re-thread and reconnect to the two sets of threaded holes opened on the second base plate 803, thereby stabilizing the entire limiting component 8 structure. Flange 11 can be made of materials such as rubber, which has good sealing performance and shock absorption effect. Of course, commonly used solutions can also be adopted.

[0031] The fixed part of the latch 7 is installed on the outer wall of the two sets of movable blocks 6, and the movable part of the latch 7 is installed on the outer wall of the two sets of side sleeves 801. Through the cooperation of the movable part and the fixed part of the latch 7, the limiting component 8 and the two sets of movable blocks 6 can be fixed together. It should be noted that the industrial latch is made of stainless steel and can withstand the weight of the air duct 13. The latch 7 can directly adopt the existing solution, and will not be described in detail here.

[0032] The bidirectional lead screw 5 is threaded to the inner side of the threaded fastener 39, and the outer side of the threaded fastener 39 is threaded to the threaded hole on the side of the main rib 1. One end of the bidirectional lead screw 5 is connected to the crank handle 10. During installation, according to the size of the air duct 13 and the flange 11, the crank handle 10 is manually turned to drive the bidirectional lead screw 5 to rotate. The rotation of the bidirectional lead screw 5 will cause the two sets of moving blocks 6 to move closer or further apart (refer to the prior art for details), so that the positions of the two sets of moving blocks 6 can match the two sets of side sleeves 801. After the positions of the two sets of moving blocks 6 are adjusted, the threaded fastener 39 is rotated so that the outer side of the threaded fastener 39 is threaded to the threaded hole on the side of the main rib 1. Since the bidirectional lead screw 5 is threaded to the inner side of the threaded fastener 39, the bidirectional lead screw 5 is fixed, thereby stably fixing the two sets of moving blocks 6.

[0033] The limiting groove provided on the inner side of the side sleeve 801 and the L-slot 12 (shaped as shown in the figure) on the sliding connecting flange 11 are provided with a limiting groove. Figure 5 (Of course, other similar solutions that can be connected should also be within the scope of this utility model). Both ends of the duct 13 are equipped with the flanges 11; during installation, the two flanges 11 at one end of the two sets of ducts 13 are tightly fitted together, as shown in the attached figure. Figure 5As shown, at this time, the two sets of side sleeves 801 of the limiting assembly 8 can be respectively attached to the two sets of flanges 11, and as shown in the attached figure. Figure 6 As shown, the tops of both base plate 1 (802) and base plate 2 (803) are in contact with two sets of flanges 11 that fit together.

[0034] The top of the main reinforcement 1 is equipped with four sets of mounting parts 14, and the four sets of mounting parts 14 are provided with mounting holes; the entire device can be installed on the ceiling of the basement through the mounting parts 14.

[0035] Both sets of movable blocks 6 have connecting grooves 15 at their bottoms, and the shapes of the connecting grooves 15 match the tops of the side sleeves 801. When the two sets of side sleeves 801 of the limiting component 8 are respectively attached to the two sets of flanges 11 that are attached to each other, the tops of the two sets of side sleeves 801 can be inserted into the connecting grooves 15 at the bottoms of the two sets of movable blocks 6. At this time, the limiting component 8 and the two sets of movable blocks 6 can be fixed together by the four sets of locking buckles 7. With the top sleeve tightly attached to the two sets of flanges, ducts and flanges of different sizes can be fixed within a certain range, reducing the requirements for the dimensional accuracy of the ducts and flanges. It is even possible to connect ducts of different diameters by matching different flanges. For details, please refer to the pipe flange technology, which will not be elaborated further.

[0036] Two sets of guide support rods 16 slide through the inner side of each of the two sets of movable blocks 6. All four sets of guide support rods 16 are connected to the groove wall of the main rib 1 where the installation groove is opened. The guide support rods 16 can provide guidance for the movable blocks 6. The guide support rods 16 are made of stainless steel, so that the guide support rods 16 can bear the weight of the air duct 13.

[0037] The working principle of this utility model is as follows: During installation, according to the dimensions of the duct 13 and the flange 11, rotate the two sets of threaded fasteners 805 to disengage them from the base plate 803, adjust the distance between the two sets of side sleeves 801, and after adjusting the distance, rotate the two sets of threaded fasteners 805 again to reconnect them to the two sets of threaded holes on the base plate 803, thereby stabilizing the entire limiting assembly 8 structure. In another example, ducts 13 of different diameters can be connected by changing the diameter at both ends of the flange 11. For example, if the two ends of a flange 11 are of different diameters, the diameter of the ventilation duct can be increased or decreased locally. The specific form of this type of flange can be referred to the existing technology in the field of pipelines.

[0038] Similarly, based on the dimensions of the duct 13 and flange 11, manually turn the crank handle 10 to drive the double-acting screw 5 to rotate. The rotation of the double-acting screw 5 will cause the two sets of moving blocks 6 to move closer or further apart, so that the positions of the two sets of moving blocks 6 can match the two sets of side sleeves 801. After the positions of the two sets of moving blocks 6 are adjusted, rotate the threaded fastener 39 so that the outer thread of the threaded fastener 39 is connected to the threaded hole on the side of the main rib 1. Since the double-acting screw 5 is threadedly connected to the inner side of the threaded fastener 39, the double-acting screw 5 is fixed, thereby stabilizing the two sets of moving blocks 6.

[0039] During installation, the two flanges 11 at one end of the two sets of air ducts 13 are tightly fitted together, as shown in the attached figure. Figure 5 As shown, at this time, the two sets of side sleeves 801 of the limiting assembly 8 can be respectively attached to the two sets of flanges 11, and the tops of the first base plate 802 and the second base plate 803 are in contact with the two sets of flanges 11, as shown in the attached figure. Figure 6 As shown, the tops of the two sets of side sleeves 801 can then be inserted into the connecting grooves 15 at the bottom of the two sets of moving blocks 6 respectively. At this time, the limiting component 8 and the two sets of moving blocks 6 can be fixed together by the four sets of locking buckles 7. Then, the two sets of screw rods 3 are slid down, so that the top sleeve 4 moves down and fits tightly against the two sets of flanges 11. Then, the two sets of threaded fasteners 2 are rotated, so that the two sets of threaded holes at the top of the main rib 1 are threadedly connected to a set of threaded fasteners 2 respectively. Since the inner sides of the two sets of threaded fasteners 2 are threadedly connected to a set of screw rods 3 respectively, the screw rods 3 can be stably fixed, thereby stably fixing the top sleeve 4, and thus stably fitting the two sets of mutually fitting flanges 11 together.

[0040] When ductwork maintenance is required, simply separate the movable and fixed parts of the four sets of locking clips 7 to slide the entire limiting assembly 8 downwards, allowing the ductwork 13 to be directly disassembled for maintenance. Alternatively, if only one section of ductwork 13 needs maintenance, adjacent sections that do not require maintenance can be longitudinally positioned (e.g., through bottom support or temporary hoisting), allowing only one section of ductwork 13 to be lowered and moved. During maintenance, multiple sections of ductwork 13 can be lowered for repair without complete disassembly.

[0041] The outer walls of threaded fasteners 1-2, 2-805, and 3-9 can be connected to the main rib 1, base plate 2-803, and main rib 1 respectively via their threads. When threaded fasteners 1-2, 2-805, and 3-9 are respectively connected and locked to their corresponding main bodies, the compressive force between them and the internally fitted screws increases, making it difficult for the internal screws to rotate, thus limiting rotation and providing a limiting function. Specifically, taking threaded fastener 1-2 as an example, it is generally required that the thread pitch of the inner and outer threads of threaded fastener 1-2 be different. When threaded fastener 1-2 is tightened to the main rib 1 via threads, it applies compressive force to the screw 3-3 in the axial direction, increasing the friction between the two and locking the screw 3-3. To improve seismic performance, rubber pads can also be fitted on the outer threads of threaded fasteners 1-2, 2-805, and 3-9 to increase the seismic resistance of the connection between threaded fasteners 1-2, 2-805, and 3-9 and the through holes, making it less prone to loosening due to vibration.

[0042] Fixed connections do not necessarily mean completely inseparable connections; they mainly mean fixed positioning and can be achieved through welding, riveting, or other methods, depending on the application scenario.

[0043] For any details not covered herein, please refer to the existing technology. The above content is a further detailed description of this utility model in conjunction with specific embodiments. It should not be considered that the specific implementation of this utility model is limited to these descriptions. For those skilled in the art to which this utility model pertains, several simple deductions or substitutions can be made without departing from the concept of this utility model, and all of these should be considered to fall within the protection scope defined by the claims submitted by this utility model.

Claims

1. An adjustable limiting component for building ventilation ducts, comprising a main reinforcing bar (1), characterized in that: The threaded hole at the top of the main rib (1) is threaded to a threaded fastener (2), the threaded fastener (2) is internally threaded to a screw rod (3), the bottom of the screw rod (3) is connected to a top sleeve (4), the screw rod (3) slides through the inside of the main rib (1), the main rib (1) is rotatably connected to a bidirectional screw rod (5) through a bearing, the bidirectional screw rod (5) is threaded to two sets of moving blocks (6), the two sets of moving blocks (6) are connected to a limiting assembly (8) through four sets of latches (7).

2. The adjustable limiting component for building ventilation ducts according to claim 1, characterized in that: The limiting component (8) includes two sets of side sleeves (801), which are respectively installed on the top of the first base plate (802) and the second base plate (803). Two sets of screw rods (804) slide through the inner side of the second base plate (803). Both sets of screw rods (804) are connected to the first base plate (802). The two sets of screw rods (804) are respectively threaded to the inner side of two sets of threaded fasteners (805). The outer side of the two sets of threaded fasteners (805) are respectively threaded to two sets of threaded holes opened on the second base plate (803).

3. The adjustable limiting component for building ventilation ducts according to claim 1, characterized in that: The fixed part of the latch (7) is installed on the outer wall of the two sets of movable blocks (6), and the movable part of the latch (7) is installed on the outer wall of the two sets of side sleeves (801).

4. The adjustable limiting component for building ventilation ducts according to claim 1, characterized in that: The bidirectional screw (5) is threaded to the inner side of the threaded fastener three (9), and the outer side of the threaded fastener three (9) is threaded to the threaded hole opened on the side of the main rib (1). One end of the bidirectional screw (5) is connected to the crank handle (10).

5. The adjustable limiting component for building ventilation ducts according to claim 2, characterized in that: The limiting groove provided on the inner side of the side sleeve (801) is used to slide the flange (11). The flange (11) has an L-slot (12). The flange (11) is fixedly installed at the end of the air duct (13) for docking with the flanges (11) of other air ducts (13).

6. The adjustable limiting component for building ventilation ducts according to claim 1, characterized in that: The top of the main reinforcement (1) is equipped with four sets of mounting parts (14), and the four sets of mounting parts (14) have mounting holes.

7. The adjustable limiting component for building ventilation ducts according to claim 1, characterized in that: Both sets of movable blocks (6) have connecting grooves (15) at their bottoms, and both sets of connecting grooves (15) are matched with the top shape of the side sleeve (801).

8. The adjustable limiting component for building ventilation ducts according to claim 1, characterized in that: Two sets of guide support rods (16) slide through the inner side of the two sets of moving blocks (6), and all four sets of guide support rods (16) are connected to the groove wall of the main reinforcement (1) with the groove for installation.

9. A building ventilation duct, characterized in that: It includes several air ducts (13) and an adjustable limiting component for building ventilation ducts as described in any one of claims 1 to 8, wherein the adjacent ends of two adjacent air ducts (13) are connected and fixed by the same adjustable limiting component for building ventilation ducts.

10. The building ventilation duct according to claim 9, characterized in that: The connecting flanges (11) at the adjacent ends of two adjacent air ducts (13) are connected and locked by an embedded side sleeve (801).

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