Building smoke prevention and exhaust air pipe communicating structure

Abstract

The utility model relates to a building smoke prevention and exhaust air pipe communicating structure which comprises an air pipe, the air pipe is mainly composed of an air pipe body, a head flange and a tail flange, the head flange and the tail flange are arranged at the two ends of the air pipe body, and the head flanges and the tail flanges of two adjacent air pipes are connected through a quick connection pressing ring. The quick-connection pressing ring comprises a fixed pressing plate, a floating pressing plate, two connecting screw rods and an adjusting screw sleeve, the fixed pressing plate is rotationally assembled on the outer end face of the tail flange, one end of each connecting screw rod is connected with the fixed pressing plate, the floating pressing plate is parallel to the fixed pressing plate, and penetrating holes allowing the two connecting screw rods to penetrate through are formed in the middle of the floating pressing plate; the adjusting screw sleeve is located at the penetrating hole of the floating pressing plate and rotationally connected with the floating pressing plate, the interior of the adjusting screw sleeve is in threaded connection with the connecting screw rod, and by screwing the adjusting screw sleeve, the distance between the floating pressing plate and the fixed pressing plate can be adjusted, the outer end face of the head flange is pressed, and the head flange and the tail flange are clamped. According to the utility model, the two air pipes are convenient and quick to disassemble and assemble, and the device has the advantages of simple operation and safe and stable structure.

Description

Technical Field

[0001] The utility model relates to the technical field of building pipelines, and more specifically to a building smoke exhaust duct connecting structure. Background Art

[0002] The smoke control and exhaust system is mainly composed of air ducts, supply / exhaust fans and other components. It is the assembly of the smoke control system and the smoke exhaust system. As an important part of the fire safety control system, it is mainly used to control the smoke and fire source of the building to prevent the spread of fire. The air duct is responsible for discharging the smoke and exhaust gas in the smoke exhaust port to the outside of the building, and also for sending fresh air into the building.

[0003] The internal structure and pipeline distribution of the building are complex, so the assembly of smoke exhaust ducts is generally installed in sections, and two adjacent ducts are generally connected by flanges and bolts. Since the duct installation and connection are generally high-altitude operations, the bolt installation steps are relatively cumbersome, the installation efficiency is not high, and the personal safety risks of the installers are increased invisibly; in addition, after the construction is completed and put into use for a period of time, the duct needs to be disassembled for maintenance or component replacement due to pipeline blockage, pipeline cleaning, replacement of internal sealing components, etc. Similarly, the disassembly steps are cumbersome, which will also bring many inconveniences and safety risks to the later maintenance. Utility Model Content

[0004] The utility model aims to provide a building smoke exhaust duct connection structure, which can solve the technical problems of complicated installation steps and inconvenient assembly and disassembly of the current ducts.

[0005] The utility model provides the following technical scheme: a building smoke exhaust duct connection structure, including an air duct, the air duct is mainly composed of an air duct body and a head flange and a tail flange arranged at both ends of the air duct body, the head flange and the tail flange of two adjacent air ducts are connected by a quick-connect pressure ring, the quick-connect pressure ring includes a fixed pressure plate, a floating pressure plate, two connecting screws and an adjusting screw sleeve, the fixed pressure plate is rotatably assembled on the outer end face of the tail flange, one end of the connecting screw is connected to the fixed pressure plate, the floating pressure plate is arranged parallel to the fixed pressure plate, a through hole for the two connecting screws to pass through is arranged in the middle of the floating pressure plate, the adjusting screw sleeve is located at the through hole of the floating pressure plate and is rotatably connected to the floating pressure plate, the inside of the adjusting screw sleeve is threadedly connected to the connecting screw, and the relative spacing of the floating pressure plate to the fixed pressure plate can be adjusted by screwing the adjusting screw sleeve, the outer end face of the head flange can be pressed, and the head flange and the tail flange can be clamped.

[0006] Furthermore, a limiting head is connected to one end of the connecting screw where a floating pressure plate is arranged, the outer diameter of the limiting head is larger than the outer diameter of the connecting screw, and an anti-slip compression spring is arranged on the connecting screw between the limiting head and the adjusting screw sleeve.

[0007] Furthermore, the inner side of the floating pressure plate and the outer end surface of the head flange are respectively provided with anti-dropout grooves and anti-dropout blocks that match each other.

[0008] Furthermore, the anti-dropping slot is a circular slot, and the exterior of the anti-dropping block has an arc-shaped surface matching the circular slot.

[0009] Furthermore, the inner end surface between the head flange and the tail flange is respectively provided with a positioning groove and a positioning block which are adapted to each other.

[0010] Furthermore, an inner extension tube body extending forward is bonded to the inside of one end of the head flange of the duct body. The inner extension tube body is made of a flexible material and is used to extend into the inside of the previous duct body and to have an interference fit with the inner wall of the duct body.

[0011] Furthermore, a sealing ring is provided between the inner end surfaces of the head flange and the tail flange to maintain a sealed fit.

[0012] The utility model discloses the installation process of the building smoke exhaust duct connecting structure as follows: the tail flange of the front duct is connected with the head flange of the rear duct, the quick-connect pressure ring is rotated, the floating pressure plate is rotated to the outside of the head flange, the adjusting screw sleeve is screwed to move the floating pressure plate toward the fixed pressure plate, until the inner side of the floating pressure plate is pressed against the outer end face of the head flange and the head flange and the tail flange are clamped, and the quick-connect pressure ring is installed in turn, that is, the installation of the head flange and the tail flange is completed. Similarly, when disassembling, the adjusting screw sleeve is screwed in the opposite direction to loosen the floating pressure plate, and the quick pressure ring can be removed, and the quick-connect pressure ring is removed in turn, so that the head flange and the tail flange can be separated. The building smoke exhaust duct connecting structure optimizes the connection form between the two ducts, effectively shortens the actual screwing distance of the thread, is simple and convenient to operate, and simplifies the installation and disassembly steps of the two adjacent ducts. On the one hand, it brings convenience to the early installation and later maintenance work and improves the loading and unloading efficiency. On the other hand, it reduces the time that personnel stay in high places, thereby reducing the safety risk of personnel operation.

[0013] An anti-slip compression spring is arranged between the limit head and the adjusting screw sleeve. The anti-slip compression spring provides pressure to the adjusting screw sleeve to ensure that the floating pressure plate presses the head flange tightly, and can also increase the matching friction between the adjusting screw sleeve and the connecting screw to prevent the adjusting screw sleeve from loosening;

[0014] Positioning slots and positioning blocks are respectively arranged on the inner end faces between the head flange and the tail flange, so that the head flange and the tail flange can be quickly and accurately positioned when they are connected; the inner extension body at the front end of the duct body is extended into the interior of the previous duct body for interference fit when in use, so as to seal the joint between the two ducts, supplemented by a sealing ring arranged between the inner end faces of the head flange and the tail flange, to ensure the sealing effect and prevent air leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of a specific embodiment 1 of a building smoke exhaust duct connection structure of the utility model;

[0016] Figure 2 yes Figure 1 A magnified view of the structure at center A;

[0017] Figure 3 It is a structural schematic diagram of a quick-connect pressure ring in a specific embodiment 1 of a building smoke exhaust duct connection structure of the utility model;

[0018] Figure markings: 1-duct body; 2-tail flange; 3-head flange; 4-quick-connect pressure ring; 5-inner extension tube body; 6-fixed pressure plate; 7-connecting screw; 8-floating pressure plate; 9-adjusting screw sleeve; 10-limiting head; 11-anti-dropping compression spring; 12-anti-dropping block; 13-positioning block; 14-sealing ring. DETAILED DESCRIPTION

[0019] The utility model is described in detail below in conjunction with the accompanying drawings.

[0020] Specific embodiment 1 of a building smoke exhaust duct connection structure of the utility model:

[0021] like Figure 1 As shown, the smoke exhaust duct connection structure of the building includes multiple sections of ducts connected end to end in sequence, and the duct includes a duct body 1 and a head flange 3 and a tail flange 2 arranged at both ends of the duct body 1. The tail flange 2 of the previous duct is connected to the head flange 3 of the next duct through a plurality of quick-connect pressure rings 4, and the inner end faces of the tail flange 2 and the head flange 3 are butted when connected.

[0022] like Figure 2-Figure 3 As shown, the quick-connect pressure ring 4 includes a fixed pressure plate 6, a floating pressure plate 8, two connecting screws 9 and an adjusting screw sleeve 7, wherein the fixed pressure plate 6 is rotatably connected to the outer end surface of the tail flange 2, and the fixed pressure plate 6 is arranged in parallel with the floating pressure plate 8 and connected through two connecting screws 9. One end of the connecting screw 9 is fixedly connected to the fixed pressure plate 6, and the other end is floatingly connected to the floating pressure plate 8. Specifically, the floating pressure plate 8 is provided with two through holes for the connecting screw 9 to pass through, and the through holes of the floating pressure plate 8 are rotatably installed with an adjusting screw sleeve 9 for the connecting screw 9 to be threadedly installed. The spacing of the floating pressure plate 8 relative to the fixed pressure plate 6 can be adjusted by screwing the adjusting screw sleeve 9. During installation, the floating pressure plate 8 is moved close to the fixed pressure plate 6, so that the head flange 3 and the tail flange 2 are clamped and fixed between the fixed pressure plate 6 and the floating pressure plate 8.

[0023] In order to ensure the clamping effect of the floating pressure plate 8 and to ensure that it cooperates stably with the head flange 3 and is not easy to loosen, an anti-slip block 12 is arranged on the inner side of the floating pressure plate 8, and an anti-slip groove is arranged on the outer end face of the head flange to accommodate the anti-slip block 12; to facilitate the insertion of the anti-slip block 12, the anti-slip groove is arranged as a circular groove, and the outer side of the anti-slip block 12 has an arc surface matching the circular groove. The connecting screw 7 is connected to one end of the floating pressure plate with a limit head 10 having an outer diameter greater than that of the connecting screw 7, and the connecting screw 7 is sleeved with an anti-slip compression spring 11 whose two ends are respectively connected to the limit head 10 and the adjusting screw sleeve 9. The anti-slip compression spring 11 provides pressure to the adjusting screw sleeve 9 to ensure that the floating pressure plate 8 clamps the head flange 3, and at the same time, increases the friction between the adjusting screw sleeve 9 and the connecting screw 7 to prevent the adjusting screw sleeve 9 from loosening.

[0024] The inner end faces between the head flange 3 and the tail flange 2 are respectively provided with mutually adapted positioning slots and positioning blocks 13, which facilitate quick positioning and alignment of the two air ducts during installation. The air duct body 1 is bonded with an inner extension body 5 extending forward at one end of the head flange. The inner extension body 5 is made of a flexible material such as rubber. When actually used, it extends into the interior of the previous air duct body 1 and has an interference fit with the inner wall of the air duct body 1, thereby blocking the interior of the joint between the head flange 3 and the tail flange 2 to prevent air leakage. In addition, a sealing ring 14 is provided between the inner end faces where the head flange 3 and the tail flange 2 are butt-jointed to maintain a sealed fit, and the number of the sealing rings 14 is at least two, which plays a double or multiple sealing role.

[0025] When installing a building smoke exhaust duct connecting structure of the utility model, the head flange 3 and the tail flange 2 of the two ducts are aligned, so that the inner extension pipe body 5 of the rear duct is extended into the interior of the front duct and interference fits, and the positioning block 13 is inserted into the positioning slot to complete the rapid positioning of the head flange 3 and the tail flange 2; then the quick-connect pressure ring is installed, the quick-connect pressure ring is rotated to make the fixed pressure plate 6 close to the outer end surface of the tail flange 2, and the adjusting screw sleeve 9 is screwed to make the floating pressure plate 8 move toward the fixed pressure plate 6 until the fixed pressure plate 6 presses the outer end surface of the head flange 3, and the head flange 3 and the tail flange 2 are clamped between the floating pressure plate 8 and the fixed pressure plate 6, and the anti-slip structure (anti-slip compression spring, anti-slip block / groove) is set to ensure the stability and tightness of the quick-connect pressure ring; when disassembling, the floating pressure plate can be removed by reversely screwing the adjusting screw sleeve to loosen the floating pressure plate. Compared with the traditional bolt flange connection structure, the thread tightening distance is significantly shortened, the operation steps are convenient and simple, the installation and disassembly steps of the two air ducts are simplified, the loading and unloading efficiency is improved, and it is convenient for early installation and later maintenance and disassembly. By reducing the time of personnel working at height, the safety risks of personnel operations are reduced.

[0026] The above are only preferred implementations of the utility model. The protection scope of the utility model is not limited to the above embodiments. All technical solutions under the idea of ​​the utility model belong to the protection scope of the utility model. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the utility model should also be regarded as the protection scope of the utility model.

Claims

1. A building smoke exhaust duct connection structure, comprising an air duct, the air duct mainly consisting of an air duct body and a head flange and a tail flange arranged at both ends of the air duct body, wherein: The head flange and tail flange of two adjacent air ducts are connected by a quick-connect pressure ring, which includes a fixed pressure plate, a floating pressure plate, two connecting screws and an adjusting screw sleeve. The fixed pressure plate is rotatably assembled on the outer end face of the tail flange, one end of the connecting screw is connected to the fixed pressure plate, the floating pressure plate is arranged parallel to the fixed pressure plate, a through hole is arranged in the middle of the floating pressure plate for the two connecting screws to pass through, the adjusting screw sleeve is located at the through hole of the floating pressure plate and is rotatably connected to the floating pressure plate, the inside of the adjusting screw sleeve is threadedly connected to the connecting screw, and the spacing between the floating pressure plate and the fixed pressure plate can be adjusted by screwing the adjusting screw sleeve, the outer end face of the head flange can be pressed, and the head flange and the tail flange can be clamped.

2. A building smoke exhaust duct connection structure as claimed in claim 1, characterized in that: The connecting screw is connected to a limit head at one end of a floating pressure plate, the outer diameter of the limit head is larger than the outer diameter of the connecting screw, and an anti-dropping compression spring is arranged on the connecting screw between the limit head and the adjusting screw sleeve.

3. A building smoke exhaust duct connection structure as claimed in claim 1 or 2, characterized in that: The inner side of the floating pressure plate and the outer end surface of the head flange are respectively provided with anti-dropping grooves and anti-dropping blocks which are adapted to each other.

4. A building smoke exhaust duct connection structure as claimed in claim 3, characterized in that: The anti-dropping slot is a circular slot, and the exterior of the anti-dropping block has an arc-shaped surface matching the circular slot.

5. A building smoke exhaust duct connection structure as claimed in claim 1, 2 or 4, characterized in that: The inner end surfaces between the head flange and the tail flange are respectively provided with positioning slots and positioning blocks which are adapted to each other.

6. A building smoke exhaust duct connection structure as claimed in claim 1, 2 or 4, characterized in that: An inner extension tube body extending forward is bonded inside one end of the head flange of the air duct body. The inner extension tube body is made of flexible material and is used to extend into the interior of the previous air duct body and to have an interference fit with the inner wall of the air duct body.

7. A building smoke exhaust duct connection structure as claimed in claim 1, 2 or 4, characterized in that: A sealing ring is arranged between the inner end faces of the head flange and the tail flange to maintain a sealed fit.

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