An assembled fire smoke exhaust duct connecting structure

Abstract

The utility model discloses an assembled fire-fighting smoke exhaust air pipe connecting structure relates to fire prevention ventilation equipment technical field, including the smoke exhaust pipe body, the smoke exhaust pipe body is rectangular, and the opposite two side walls of the lower end of smoke exhaust pipe body all are fixed with the extension frame, and the extension frame is linked with the smoke exhaust pipe body, is provided with the locking block sliding connection in the extension frame in the shape of upside-down right angle trapezoid, and the side wall of locking block near the smoke exhaust pipe body is inclined plane, and locking block extends to the smoke exhaust pipe body, and the compression spring is fixed between locking block side wall and extension frame inner wall, the top of smoke exhaust pipe body is fixed with the connecting pipe, and the top of connecting pipe is fixed with the locking frame, and the outer diameter of locking frame is compatible with the smoke exhaust pipe body inner diameter, and the both sides of locking frame bottom are fixed with two positioning strips, and the top of locking block is equipped with the positioning slot of the positioning strip plug -in, realize the quick connection of up and down air pipe, need not bolt and other additional fastener.

Description

Technical Field

[0001] This utility model relates to the field of fireproof ventilation equipment technology, specifically to a prefabricated fire smoke exhaust duct connection structure. Background Technology

[0002] In current standards, rectangular galvanized steel sheet exhaust pipes are widely used due to their high strength and flexible spatial arrangement. To meet the requirements of prefabricated construction, exhaust pipes are usually pre-pressed in the factory according to standard modules (such as 1m, 1.2m, 1.5m) and then transported to the site for segmental splicing.

[0003] Traditional angle steel flanges require on-site spot welding for positioning. The heat input during welding damages the galvanized layer and causes warping at the ends. When the flange surface flatness exceeds the tolerance, the gasket cannot be evenly tightened, easily leading to localized crushing. In addition, 12-16 sets of M8 bolts are required around a single section of the smoke exhaust pipe. Manual tightening is time-consuming, and the difference in thermal expansion of the bolts under the high temperature of a fire further reduces the preload. Some existing connections use snap-fit ​​connections; however, relying solely on a single elastic element for locking force, the snap-fit ​​is prone to displacement or detachment under building vibrations (such as structural vibrations during a fire or the impact of fan start-up and shutdown), resulting in misalignment at the smoke exhaust pipe connection. Utility Model Content

[0004] To address the aforementioned problems, this utility model proposes a prefabricated fire-fighting smoke exhaust duct connection structure, comprising a smoke exhaust duct body in a rectangular shape. Two opposite sidewalls at the lower end of the smoke exhaust duct body are fixed with an extension frame, which is connected to the smoke exhaust duct body. A locking block in the shape of an inverted right-angled trapezoid is slidably connected to the extension frame. The sidewall of the locking block near the smoke exhaust duct body is inclined, and the locking block extends into the smoke exhaust duct body. A compression spring is fixed between the sidewall of the locking block and the inner wall of the extension frame. A connecting pipe is fixed to the top of the smoke exhaust duct body, and a locking frame is fixed to the top of the connecting pipe. The outer diameter of the locking frame matches the inner diameter of the smoke exhaust duct body. Two positioning strips are fixed to the bottom sides of the locking frame, and a positioning groove for the positioning strips to be inserted is provided on the top of the locking block.

[0005] Furthermore, a manual unlocking component is installed on the outer frame. The manual unlocking component includes a connecting rod fixed to the side wall of the locking block away from the exhaust pipe body. The other end of the connecting rod passes through the outer frame, and a long plate is fixed to the outside of the outer frame. A pull ring is fixed to the outer wall of the long plate.

[0006] Furthermore, an upper stabilizing block and a lower stabilizing block are fixed to the top and bottom of the front and rear walls of the exhaust pipe body, respectively. The top of the upper stabilizing block has a lower slot in the shape of an inverted isosceles trapezoid, and the bottom of the lower stabilizing block has an upper slot in the shape of an isosceles trapezoid. When the two exhaust pipe bodies are connected vertically, a snap-fit ​​block is provided to be inserted into the upper slot and the lower slot. The upper end of the snap-fit ​​block is adapted to the shape of the upper slot, and the lower end of the snap-fit ​​block is adapted to the shape of the lower slot.

[0007] Furthermore, a storage groove is provided on the outer wall of the outer extension frame along the outer edge of the long plate, and a sealing strip is installed in the storage groove.

[0008] Furthermore, when the positioning strip at the upper end of the lower exhaust pipe is inserted into the positioning groove of the locking block at the lower end of the upper exhaust pipe, the bottom of the upper exhaust pipe is in close contact with the top of the lower exhaust pipe.

[0009] The beneficial effects of this utility model are as follows: 1. Enables quick connection of upper and lower ducts without the need for bolts or other additional fasteners; the locking block and compression spring work together to form an automatic locking mechanism, reducing manual operation steps; the positioning strip and positioning groove are aligned to avoid positional deviations during splicing and to create a limit.

[0010] 2. The unlocking method is simple and easy to operate, improving the efficiency of maintenance and disassembly; the setting of the snap-fit ​​block further improves the connection stability, avoids overload of the locking structure, and assists the stabilizing structure and the locking structure to work together to improve the overall load-bearing capacity and reliability of the structure. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the internal structure of the connection of this utility model; Figure 2 This is a bottom view of the internal structure of the exhaust pipe in this utility model; Figure 3 This is a schematic diagram of the external structure of the present invention after connection.

[0012] The following are the annotations in the attached drawings: 1. Exhaust pipe body; 2. Outer frame; 3. Locking block; 4. Compression spring; 5. Connecting pipe; 6. Locking frame; 7. Positioning strip; 8. Connecting rod; 9. Long plate; 10. Pull ring; 11. Upper stabilizing block; 12. Lower stabilizing block; 13. Snap-fit ​​block. Detailed Implementation

[0013] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0014] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0015] The present invention will be further described below with reference to the accompanying drawings: A prefabricated fire-fighting smoke exhaust duct connection structure, such as Figure 1 and Figure 2 As shown, the exhaust pipe 1 is rectangular in shape. Two adjacent sidewalls at the lower end of the exhaust pipe 1 are fixed with an extension frame 2, which is connected to the exhaust pipe 1. A locking block 3, shaped like an inverted right trapezoid, is slidably connected to the extension frame 2. The sidewall of the locking block 3 near the exhaust pipe 1 is inclined, and the locking block 3 extends into the exhaust pipe 1. A compression spring 4 is fixed between the sidewall of the locking block 3 and the inner wall of the extension frame 2. A connecting pipe 5 is fixed to the top of the exhaust pipe 1, and a locking frame 6 is fixed to the top of the connecting pipe 5. The outer diameter of the locking frame 6 matches the inner diameter of the exhaust pipe 1. Two positioning strips 7 are fixed to the bottom sides of the locking frame 6, and a positioning groove for the positioning strips 7 to be inserted is provided on the top of the locking block 3.

[0016] like Figure 1 As shown, in this embodiment, a manual unlocking component is installed on the outer frame 2. The manual unlocking component includes a connecting rod 8 fixed to the side wall of the locking block 3 away from the exhaust pipe body 1. The other end of the connecting rod 8 passes through the outer frame 2, and a long plate 9 is fixed to the outer side of the outer frame 2. A pull ring 10 is fixed to the outer wall of the long plate 9. A storage groove is opened on the outer wall of the outer frame 2 at the outer edge of the long plate 9, and a sealing strip is installed in the storage groove.

[0017] like Figure 3 As shown, in this embodiment, the top and bottom of the front and rear walls of the exhaust pipe 1 are respectively fixed with an upper stabilizing block 11 and a lower stabilizing block 12. The top of the upper stabilizing block 11 is provided with a lower slot in the shape of an inverted isosceles trapezoid, and the bottom of the lower stabilizing block 12 is provided with an upper slot in the shape of an isosceles trapezoid. When the two exhaust pipes 1 are connected vertically, a snap-fit ​​block 13 is provided to be inserted into the upper slot and the lower slot. The upper end of the snap-fit ​​block 13 is adapted to the shape of the upper slot, and the lower end of the snap-fit ​​block 13 is adapted to the shape of the lower slot. When the positioning strip 7 at the upper end of the lower exhaust pipe 1 is inserted into the positioning groove of the locking block 3 at the lower end of the upper exhaust pipe 1, the bottom of the upper exhaust pipe 1 is in close contact with the top of the lower exhaust pipe 1.

[0018] The working principle of this utility model is as follows: When splicing the upper and lower exhaust pipes 1, the operator uses lifting equipment or manually lifts the lower exhaust pipe 1, aligning the locking frame 6 at the top of the lower exhaust pipe 1 with the opening at the bottom of the upper exhaust pipe 1. The lower exhaust pipe 1 moves smoothly in a vertical upward direction. As the lower exhaust pipe 1 continues to rise, its locking frame 6 gradually enters the interior of the upper exhaust pipe 1. When the outer wall of the locking frame 6 contacts the inclined surface of the locking block 3 inside the upper exhaust pipe 1, because the side wall of the locking block 3 near the exhaust pipe 1 is inclined, the upward movement of the locking frame 6 will exert a continuous squeezing force on the inclined surface of the locking block 3, which is converted into a horizontal outward component force. The locking block 3 begins to move towards the interior of the outer extension frame 2. At this time, the compression spring 4 between the locking block 3 and the outer extension frame 2 is simultaneously stressed and gradually compressed as the locking block 3 moves.

[0019] When the locking frame 6 moves upward to the critical position where it is about to disengage from the locking block 3, the lower exhaust pipe 1 continues to move upward until the locking frame 6 completely disengages from the inclined contact range of the locking block 3. The horizontal compressive force on the locking block 3 disappears, and the constraint of the compression spring 4 is released, causing the locking block 3 to rebound to the initial position. After rebounding, the top plane of the locking block 3 is located below the locking frame 6, forming a horizontal support. The positioning strip 7 is aligned with the positioning groove on the top of the locking block 3 of the upper exhaust pipe 1 and inserted into the positioning groove.

[0020] After the upper and lower exhaust pipes 1 are locked, the upper slot at the bottom of the upper stabilizing block 11 aligns with the lower slot at the top of the lower stabilizing block 12. The operator takes out the snap-fit ​​block 13 and inserts it into the upper and lower slots. The inclined surfaces of the two form a wedge fit, which further improves the connection stability.

[0021] When it is necessary to repair or modify the exhaust pipe 1 system or disassemble the upper and lower exhaust pipes 1, remove the snap-fit ​​block 13, lift the lower exhaust pipe 1, so that the positioning strip 7 is released from the constraint of the positioning groove, pull the pull ring 10 on the outer side of the outer frame 2 of the upper exhaust pipe 1, and pull the locking block 3 outward through the connecting rod 8. The locking block 3 moves inward towards the inner direction of the outer frame 2, and the top plane of the locking block 3 is disconnected from the support at the bottom of the locking frame 6, so that the lower exhaust pipe 1 can be removed.

[0022] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A prefabricated fire-fighting smoke exhaust duct connection structure, comprising a smoke exhaust duct body (1), wherein the smoke exhaust duct body (1) is rectangular in shape, characterized in that: Two sidewalls opposite each other at the lower end of the exhaust pipe (1) are fixed with an extension frame (2). The extension frame (2) is connected to the exhaust pipe (1). A locking block (3) in the shape of an inverted right trapezoid is slidably connected to the extension frame (2). The sidewall of the locking block (3) near the exhaust pipe (1) is inclined. The locking block (3) extends into the exhaust pipe (1). A compression spring (4) is fixed between the sidewall of the locking block (3) and the inner wall of the extension frame (2). A connecting pipe (5) is fixed at the top of the exhaust pipe (1). A locking frame (6) is fixed at the top of the connecting pipe (5). The outer diameter of the locking frame (6) is matched with the inner diameter of the exhaust pipe (1). Two positioning strips (7) are fixed on both sides of the bottom of the locking frame (6). A positioning groove for the positioning strips (7) to be inserted is opened at the top of the locking block (3).

2. The prefabricated fire-fighting smoke exhaust duct connection structure according to claim 1, characterized in that: The outer frame (2) is equipped with a manual unlocking component, which includes a connecting rod (8) fixed to the side wall of the locking block (3) away from the exhaust pipe body (1). The other end of the connecting rod (8) passes through the outer frame (2), and a long plate (9) is fixed to the outside of the outer frame (2). A pull ring (10) is fixed to the outer wall of the long plate (9).

3. The prefabricated fire-fighting smoke exhaust duct connection structure according to claim 1, characterized in that: The top and bottom of the front and rear walls of the exhaust pipe (1) are respectively fixed with an upper stabilizing block (11) and a lower stabilizing block (12). The top of the upper stabilizing block (11) is provided with a lower slot in the shape of an inverted isosceles trapezoid, and the bottom of the lower stabilizing block (12) is provided with an upper slot in the shape of an isosceles trapezoid. When the two exhaust pipes (1) are connected vertically, a snap-fit ​​block (13) is provided to be inserted into the upper slot and the lower slot. The upper end of the snap-fit ​​block (13) is adapted to the shape of the upper slot, and the lower end of the snap-fit ​​block (13) is adapted to the shape of the lower slot.

4. The prefabricated fire-fighting smoke exhaust duct connection structure according to claim 2, characterized in that: The outer wall of the extension frame (2) is provided with a storage groove on the outer edge of the long plate (9), and a sealing strip is installed in the storage groove.

5. The prefabricated fire-fighting smoke exhaust duct connection structure according to claim 1, characterized in that: When the positioning strip (7) at the upper end of the lower exhaust pipe (1) is inserted into the positioning groove of the locking block (3) at the lower end of the upper exhaust pipe (1), the bottom of the upper exhaust pipe (1) and the top of the lower exhaust pipe (1) are in close contact.

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