Spring-hinged flow guide inner flange device

Abstract

The utility model relates to the technical field of air pipe connection, and specifically discloses a spring hinge type flow guide inner flange device, which comprises angle iron flanges riveted at the end portions of two sections of refractory air pipes respectively, the two flanges are connected through a bolt fastener, and a refractory gasket is clamped therebetween. The frame body end outer side of one of the angle iron flanges is connected with a spring hinge through a rivet, and the movable end of the spring hinge is riveted with a flow guide plate; the flow guide plate is fixed to the inner wall of the air pipe through structural adhesive and forms a flow guide angle of preferably 40 degrees with the inner wall. The utility model changes the right-angle block of the traditional flange connection into a smooth flow channel through the internal flow guide plate connected by the spring hinge, effectively suppresses airflow separation and vortex, and can significantly reduce local resistance and energy consumption; meanwhile, the advantages of the inner flange in saving installation space are completely retained, the flow guide plate can be self-adaptively adjusted to ensure smooth and continuous flow channel, and the utility model has the outstanding advantages of firm structure, convenient installation, energy saving and noise reduction.

Description

Technical Field

[0001] This utility model relates to the field of duct connection technology, specifically to a spring hinge type flow guide inner flange device. Background Technology

[0002] In ventilation systems of large buildings, when the duct cross-section is large or the installation space is narrow (such as in subway tunnels or equipment floors), traditional external flange connections (bolts fastened to the outside of the duct) are difficult to implement. Therefore, internal flange connections are commonly used in engineering projects.

[0003] Currently, the most common type of internal flange is the angle steel internal flange. It is typically made of equal-sided angle steel, with one side riveted or welded to the duct wall, and the other side drilled with bolt holes for bolt connection to angle steel flanges in adjacent duct sections. While the angle steel internal flange solves the problem of external operating space, it has the following significant disadvantages: 1. Significant loss of ventilation cross-sectional area: Angle steel protrudes into the air duct, occupying the effective ventilation area. For large air ducts, the waste of materials and loss of cross-sectional area are particularly obvious.

[0004] 2. High airflow resistance and high energy consumption: When airflow passes through the right-angle protruding angle steel, it will generate violent flow separation and eddies, which will cause the local resistance coefficient to increase sharply, increasing the operating energy consumption of the fan.

[0005] 3. Dust accumulation and noise generation: The prominent right-angle structure easily accumulates dust, and the airflow can easily generate aerodynamic noise such as whistling when it passes around it.

[0006] 4. Heavy weight: Angle steel has a high density, which increases the overall weight of the duct system and the load on the support.

[0007] Therefore, the present invention aims to provide an improved duct internal flange connection structure that effectively overcomes the above-mentioned defects while retaining the advantage of internal flanges being easy to install in narrow spaces. Utility Model Content

[0008] In view of the above-mentioned technical problems in related technologies, this utility model provides a spring hinge type flow guide inner flange device, which can solve the above problems.

[0009] To achieve the above-mentioned technical objectives, the technical solution of this utility model is implemented as follows: A spring-hinged flow guide inner flange device includes a fire-resistant duct 1 and a fire-resistant duct 2. An angle iron flange 1 is riveted to the butt end of the fire-resistant duct 1, and an angle iron flange 2 is riveted to the butt end of the fire-resistant duct 2. Angle iron flange 1 and angle iron flange 2 are connected by bolts. A hinge is riveted to one side of angle iron flange 2, and a flow guide plate is riveted to the hinge end face of the hinge. One end of the flow guide plate is fixed to the inner wall surface of the fire-resistant duct 2 by structural adhesive.

[0010] Furthermore, the guide plate has a guide angle of 40° with the inner wall surface of the fire-resistant air duct.

[0011] Furthermore, both angle iron flange one and angle iron flange two include a clamping groove for wrapping the butt joint of the fire-resistant air duct and a frame end for connecting the two angle iron flanges, with a fire-resistant gasket sandwiched between the frame ends of angle iron flange one and angle iron flange two.

[0012] Furthermore, the grooved part of angle iron flange one is fitted with the mating end of fire-resistant air duct one and fastened by rivets, and the grooved part of angle iron flange two is fitted with the mating end of fire-resistant air duct two and fastened by rivets.

[0013] Furthermore, the hinge type includes a movable hinge end and a fixed hinge end. The movable hinge end is connected to the baffle plate, and the fixed hinge end of the hinge type is fitted with the frame end of the angle iron flange two. The fixed hinge end of the hinge type, the frame end of the angle iron flange two, the fireproof gasket, and the frame end of the angle iron flange one are all connected by rivets through and fastened with rivets.

[0014] Furthermore, the hinge is a spring hinge. The spring force of the spring makes the moving hinge end of the hinge always drive the guide plate to fit against the inner wall surface of the fire-resistant air duct.

[0015] The beneficial effects of this utility model are: 1. The device in this application transforms the right-angle blocking structure at the traditional angle steel flange connection into a smooth airflow channel by setting a guide plate at a specific angle to the inner wall of the air duct. This effectively suppresses airflow separation and vortex generation. The measured local resistance coefficient can be reduced by more than 40% compared with the traditional angle steel flange, thereby reducing the energy consumption of the system fan and achieving significant energy-saving effect.

[0016] 2. The main body of the device is still fastened with angle steel flanges and bolts, inheriting the core advantage of the internal flange connection method that does not require fastening operations outside the air duct. It is particularly suitable for installation scenarios with narrow space and inconvenient maintenance, and the ease of installation is not affected.

[0017] 3. The guide plate and flange are connected by spring hinges (hinged hinges), which enables the guide plate to automatically close or maintain a predetermined angle. During the installation of the air duct, the guide plate can be adjusted to ensure a continuous and smooth airflow surface. At the same time, it is fixed to the inner wall of the air duct by both structural adhesive and riveting, which makes the connection firm and durable. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] The present invention will now be described in further detail with reference to the accompanying drawings.

[0020] Figure 1 This is a schematic diagram of the installation structure of the spring-hinged flow guide inner flange device and the fire-resistant air duct. Figure 2 This is an enlarged view of the structural details of the spring-hinged flow guide inner flange device.

[0021] In the picture: 1. Fire-resistant air duct one; 2. Fire-resistant air duct two; 3. Angle iron flange one; 4. Angle iron flange two; 5. Baffle plate; 6. Fire-resistant gasket; 7. Hinged hinge; 8. Structural adhesive; 9. Bolts and fasteners. Detailed Implementation

[0022] 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. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model are within the protection scope of the present utility model.

[0023] like Figure 1-2 As shown, this utility model discloses a spring hinge type flow guide inner flange device, which is mainly used to connect two sections of fire-resistant air duct with circular or rectangular cross sections, so as to significantly improve the aerodynamic performance of the connection while ensuring the connection strength.

[0024] The device mainly includes a first duct assembly, a second duct assembly, and connecting fasteners. The first duct assembly consists of a fire-resistant duct 1 and an angle iron flange 3 fixed at its mating end; the second duct assembly consists of a fire-resistant duct 2, an angle iron flange 4 fixed at its mating end, a baffle plate 5, and a hinge 7 connecting the two. The two duct assemblies are connected by bolts and fasteners 9.

[0025] Angle iron flange 1 (3) and angle iron flange 2 (4) have the same structure, both made of L-shaped angle iron, including mutually perpendicular "grooving parts" and "frame ends". The "grooving parts" are used to wrap and secure the ends of the duct: during installation, the mating ends of ducts 1 and 2 are inserted into the grooves of angle iron flanges 3 and 4, and then riveted through with rivets to form a strong mechanical connection. The "frame end" is the mating plane of the flange, with evenly distributed bolt holes. When the two flanges are mated, a fire-resistant gasket 6 is sandwiched between the frame ends of angle iron flange 1 (3) and angle iron flange 2 (4) to ensure the airtightness and fire resistance of the connection.

[0026] The core innovation of this embodiment lies in the air guiding mechanism located inside the second duct assembly. This mechanism consists of an air guiding plate 5 and a hinge 7. The hinge 7 is preferably a spring hinge, which includes a fixed hinge end and a movable hinge end. The fixed hinge end is fitted against the outer side of the frame end of the angle iron flange 4, and is riveted together with the flange frame end, the fireproof gasket 6, and the frame end of the angle iron flange 3 by the same row of rivets, thereby fixing the hinge.

[0027] The guide plate 5 is a smooth, curved or sloping panel, made of the same material as the inner wall of the duct. One end of the guide plate 5, near the center of the duct, is firmly attached to the inner wall surface of the fire-resistant duct 2 using structural adhesive 8; the other end, near the flange, is riveted to the movable hinge end of the hinge-type hinge 7. After installation, the surface of the guide plate 5 forms an acute guide angle α with the inner wall surface of the fire-resistant duct 2. As a preferred option, this guide angle α is designed to be 40°, an angle that has been experimentally verified to achieve the best balance between effectively guiding airflow and maintaining structural rationality.

[0028] Assembly and working principle: Pre-assembly: The angle iron flange and the air guide mechanism are riveted to the air ducts at both ends to form the first and second air duct assemblies.

[0029] Connection: Align the end faces of the two duct sections, so that the frame ends of angle iron flange 13 and angle iron flange 24 contact each other through the fire-resistant gasket 6. During this process, the end of the first duct assembly will naturally press against the free edge of the guide plate 5. Due to the action of the spring hinge, the guide plate 5 will adaptively adjust to the optimal angle to ensure that its plate surface smoothly transitions with the inner wall of the first duct assembly, forming a gradually narrowing continuous flow channel from fire-resistant duct 1 to fire-resistant duct 2.

[0030] Fastening: Using bolt fastener 9 from inside the duct, pass it through the bolt holes of both flanges and tighten it to complete the sealed connection of the duct. The internal baffle maintains a stable shape under the fixation of the hinge spring and structural adhesive.

[0031] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A spring-hinged flow-guiding inner flange device, characterized in that, The fire duct includes a fire-resistant duct 1 (1) and a fire-resistant duct 2 (2). Angle iron flange 1 (3) is riveted to the butt end of the fire-resistant duct 1 (1), and angle iron flange 2 (4) is riveted to the butt end of the fire-resistant duct 2 (2). Angle iron flange 1 (3) and angle iron flange 2 (4) are connected by bolt fasteners (9). A hinge (7) is riveted to one side of angle iron flange 2 (4), and a guide plate (5) is riveted to the hinge end face of the hinge (7). One end of the guide plate (5) is fixed to the inner wall surface of the fire-resistant duct 2 (2) by structural adhesive.

2. The spring-hinged flow guide inner flange device according to claim 1, characterized in that, The guide plate (5) has a guide angle of 40° with the inner wall surface of the fire-resistant air duct (2).

3. The spring-hinged flow guide inner flange device according to claim 1, characterized in that, Both angle iron flange one (3) and angle iron flange two (4) include a clamping groove for wrapping the joint end of the fire-resistant air duct and a frame end for connecting the two angle iron flanges. A fire-resistant gasket (6) is sandwiched between the frame ends of angle iron flange one (3) and angle iron flange two (4).

4. The spring-hinged flow guide inner flange device according to claim 3, characterized in that, The groove of the first angle iron flange (3) is fitted with the mating end of the first fire-resistant air duct (1) and fastened by rivets. The groove of the second angle iron flange (4) is fitted with the mating end of the second fire-resistant air duct (2) and fastened by rivets.

5. The spring-hinged flow guide inner flange device according to claim 1, characterized in that, The hinge (7) is a spring hinge.

6. The spring-hinged flow guide inner flange device according to claim 3, characterized in that, The hinge (7) includes a movable hinge end and a fixed hinge end. The movable hinge end is connected to the guide plate (5). The fixed hinge end of the hinge (7) is attached to the frame end of the angle iron flange (4). The fixed hinge end of the hinge (7), the frame end of the angle iron flange (4), the fire resistant gasket (6), and the frame end of the angle iron flange (3) are all connected by rivets.

Images