Fire smoke exhaust duct

Abstract

This invention relates to the field of smoke exhaust ducts, and more particularly to a fire-fighting smoke exhaust duct. The fire-fighting smoke exhaust duct includes a smoke pipe body, with mounting plates at both ends. It also includes: multiple sub-connecting components, each set on one end of the mounting plate; a female connecting component, corresponding to the number and position of the sub-connecting components, set on the other end of the mounting plate; an elastic support component, mounted on the sub-connecting components; two vertical locking components, diagonally distributed at the bottom of the smoke pipe body; and an elastic compensation component, mounted on the vertical locking components, for adaptively fitting the inner wall of the smoke pipe body. In the fire-fighting smoke exhaust duct provided by this invention, the insertion of the conical end of the insertion rod into the teardrop-shaped insertion hole enables rapid connection of adjacent smoke pipe bodies, improving the efficiency of pipe assembly and disassembly.

Description

Technical Field

[0001] This invention relates to the field of smoke exhaust ducts, and more particularly to a fire-fighting smoke exhaust duct. Background Technology

[0002] In building fire protection smoke exhaust systems, smoke exhaust ducts are key components connecting smoke exhaust fans and smoke exhaust outlets, and their installation quality directly affects the reliability and safety of the fire protection smoke exhaust system. Traditional smoke exhaust ducts typically have a rectangular cross-section, with flanges at both ends. Adjacent ducts are rigidly connected by bolts passing through bolt holes in the flanges, and sealing gaskets are placed between the flange faces to ensure airtightness.

[0003] The following defects and shortcomings still exist in bolt fixing: 1. Flange connections require aligning the bolt holes at the ends of adjacent pipes one by one, then inserting the bolts and tightening the nuts. Due to the large cross-section and heavy weight of the pipes, fine-tuning during on-site hoisting is difficult, often requiring multiple adjustments to complete the bolt hole alignment, consuming a lot of manpower and time, and affecting the construction progress; 2. During a fire, high-temperature smoke flows through the smoke exhaust duct, causing a rapid increase in temperature and significant axial thermal expansion. Traditional flange and bolt connections are rigid constraints that cannot release the stress generated by thermal expansion, easily leading to pipe deformation, flange warping, or bolt breakage. In severe cases, this can cause pipe cracking, smoke leakage, and affect the normal operation of the fire exhaust system.

[0004] Therefore, it is necessary to provide a new type of fire smoke exhaust duct to solve the above-mentioned technical problems. Summary of the Invention

[0005] To solve the above-mentioned technical problems, the present invention provides a fire-fighting smoke exhaust duct.

[0006] The fire-fighting smoke exhaust duct provided by the present invention includes a smoke pipe body, both ends of which are provided with mounting plates, and further includes: Sub-connecting components, wherein there are multiple sets of sub-connecting components, which are disposed on an assembly plate at one end; A female connecting member, which corresponds to the number and position of the child connecting members and is disposed on the assembly plate at the other end, and can form a plug-in fit with the child connecting members; An elastic support member is disposed on the sub-connecting member and is used to provide elastic preload after the sub-connecting member and the mother connecting member are assembled. The vertical locking components are in two sets, diagonally distributed at the bottom of the flue body, and are used to lock the vertical relative position of adjacent flue bodies. An elastic compensation component is disposed on a vertical locking component and is used to adaptively fit the inner wall of the flue body.

[0007] Preferably, the sub-connecting component includes a first mounting plate, which is welded and fixed to the assembly plate. The first mounting plate has an integrally connected mounting seat, and a threaded hole extending into the mounting seat is provided on the first mounting plate, and a plug rod is threadedly connected to it. The other end of the plug rod is integrally connected to a cone head.

[0008] Preferably, the female connecting component includes a second mounting plate, which is welded and fixed to the assembly plate, and has a teardrop-shaped insertion hole on it; The cone has a maximum diameter greater than the diameter of the lower opening of the insertion hole but less than the diameter of the upper opening of the insertion hole, so that the cone and the insertion rod can be inserted along the upper opening of the insertion hole and locked at the lower opening.

[0009] Preferably, a protruding rib is also fixed on one side of the second mounting plate. The protruding rib is disposed on the edge of the insertion hole and is disposed along its length. The rib has two parts, upper and lower. The thickness of the upper part increases from top to bottom, while the thickness of the lower part remains constant and is equal to the maximum thickness of the upper part.

[0010] Preferably, the elastic support is a disc spring assembly, which is concentrically sleeved on the insert rod, with one end abutting against the cone head and the other end abutting against the protruding rib.

[0011] Preferably, a reinforcing plate is provided between the first mounting plate, the second mounting plate and the flue body.

[0012] Preferably, the vertical locking component includes a positioning rod rotatably mounted on the flue body. One end of the positioning rod inside the flue body is fixed with a pressure plate, and the other end outside the flue body is movably connected with a knob. The pressure plate can be rotated to cover the docking area of ​​the adjacent flue body.

[0013] Preferably, a guide plate is vertically fixed at the upper end of the pressure plate to direct the flue gas flowing in the middle of the flue body to the bottom corner area of ​​the flue body.

[0014] Preferably, the knob has a light hole, the positioning rod passes concentrically through the light hole, and an axially extending groove is formed on the circumferential surface of the positioning rod, while the inner wall of the knob is provided with a slider that slides in cooperation with the groove. The positioning rod is also threaded with a nut, which abuts against the end of the knob.

[0015] Preferably, the elastic compensation component is a corrugated steel plate, which is fixed to the lower end of the pressure plate.

[0016] Compared with related technologies, the fire-fighting smoke exhaust duct provided by the present invention has the following beneficial effects: 1. The cone-shaped insertion head at the end of the insertion rod and the teardrop-shaped insertion hole can be used to quickly connect adjacent flue pipe bodies, improving the efficiency of pipe assembly and disassembly. The disc spring assembly provides continuous elastic pre-tightening force between the insertion rod and the rib. When the pipe expands due to high temperature flue gas, it is compressed to absorb the expansion. When it cools and contracts, it rebounds to keep the sealing surface pressed, thus better adapting to the thermal expansion and contraction of the flue pipe body itself.

[0017] 2. By pressing the diagonally distributed pressure plates together at the joint area of ​​two adjacent flue sections, the vertical locking of the pipe is achieved, preventing loosening of the connection due to vibration or external force. The guide plates on the pressure plates guide the high-speed airflow in the center of the pipe to the corner area when locked, eliminating dead zones in the flow field and using airflow to flush away accumulated dust, thus achieving self-cleaning of the pipe.

[0018] 3. The corrugated steel plate adapts to the inner wall of the flue through elastic deformation, so that the pressure plate is in close contact with the inner wall of the flue body, ensuring reliable locking. Attached Figure Description

[0019] Figure 1 A schematic diagram of a preferred embodiment of the fire-fighting smoke exhaust duct provided by the present invention; Figure 2 As shown in this invention Figure 1 A structural diagram of the other side; Figure 3 This is a cross-sectional structural schematic diagram of the flue body shown in this invention; Figure 4 This is a schematic diagram of the sub-connecting member shown in the present invention; Figure 5 This is a schematic diagram of the structure of the female connecting member shown in the present invention. Figure 1 ; Figure 6 This is a schematic diagram of the structure of the female connecting member shown in the present invention. Figure 2 ; Figure 7 This is a schematic diagram of the vertical locking component shown in the present invention. Figure 1 ; Figure 8 This is a schematic diagram of the vertical locking component shown in the present invention. Figure 2 ; Figure 9 This is a schematic diagram of the vertical locking component shown in the present invention. Figure 3 .

[0020] The following are the labels in the diagram: 1. Smoke pipe body; 2. First mounting plate; 3. Mounting base; 4. Insert rod; 5. Cone head; 6. Disc spring assembly; 7. Second mounting plate; 8. Insert hole; 9. Protruding rib; 10. Reinforcing plate; 11. Pressure plate; 12. Guide plate; 13. Positioning rod; 14. Slide groove; 15. Knob; 16. Slider; 17. Nut; 18. Corrugated steel plate. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0022] The specific implementation of the present invention will be described in detail below with reference to specific embodiments.

[0023] Please see Figures 1 to 9 The present invention provides a fire-fighting smoke exhaust duct, including a smoke pipe body 1, which is rectangular in shape and has an integrally formed assembly plate at both ends (the assembly plate is equivalent to the flange structure at the end of a traditional smoke exhaust duct. The difference from the traditional flange is that the assembly plate of this device does not need to be opened with bolt holes, and the assembly and docking between adjacent smoke pipe bodies 1 does not use bolt fixing).

[0024] Multiple sets of sub-connecting components and female connecting components are respectively provided on the assembly plates at both ends of the flue body 1. The two are connected by plug-in connection to realize the rapid centering and assembly between the two flue body sections 1.

[0025] The sub-connecting component includes a first mounting plate 2, which is welded and fixed to the assembly plate. A mounting base 3 is integrally connected to the first mounting plate 2, and a threaded hole extending into the mounting base 3 is formed on the first mounting plate 2. A plug rod 4 is threaded into this threaded hole. The other end of the plug rod 4 extends to the outside of the first mounting plate 2, and a cone head 5 is integrally connected to this end. The cone head 5 and the plug rod 4 together form a mushroom-shaped insertion structure, used to cooperate with the female connecting component to achieve quick insertion.

[0026] The female connecting component includes a second mounting plate 7, which is welded and fixed to the assembly plate, corresponding to the position of the first mounting plate 2. The second mounting plate 7 has a teardrop-shaped insertion hole 8, with a larger upper opening diameter and a smaller lower opening diameter. The maximum diameter of the cone 5 is smaller than the diameter of the upper opening of the insertion hole 8, but larger than the diameter of the lower opening, providing a mechanical locking effect to prevent detachment. When assembling adjacent flue pipe bodies 1, the operator simply inserts the cone 5 into the upper opening of the insertion hole 8, then moves the flue pipe body 1 downwards, causing the insertion rod 4 and the cone 5 to move downwards synchronously until they slide to the lowest position of the insertion hole 8, thus completing the initial horizontal connection.

[0027] A rib 9 is integrally connected to one side of the second mounting plate 7. This rib 9 is positioned along the length of the insertion hole 8 and located at the edge of the insertion hole 8. The rib 9 consists of two parts: the upper part corresponds to the transition section between the upper and lower openings in the insertion hole 8, and its thickness gradually increases from top to bottom; the lower part corresponds to the lower opening area of ​​the insertion hole 8, and its thickness remains constant and is equal to the maximum thickness of the upper part. As the insertion rod 4 slides downwards inside the insertion hole 8, the end of the cone 5 connected to the insertion rod 4 is subjected to the squeezing action of the rib 9. Because the thickness of the upper part of the rib 9 increases from top to bottom, the cone 5 will generate a slight horizontal displacement as it gradually moves downwards, thereby causing the corresponding flue body 1 to undergo horizontal displacement, gradually pressing the mating surfaces between the two flue body sections 1 together and improving the sealing performance. This simultaneously enhances the assembly stability and sealing performance between the two flue body sections 1.

[0028] The insert rod 4 is also equipped with an elastic support, which is a disc spring assembly 6 composed of multiple disc springs. The disc spring assembly 6 is coaxially sleeved on the insert rod 4, with one end abutting against the cone head 5 and the other end abutting against the protruding rib 9. After the two sections of the flue body 1 are assembled, the lower part of the protruding rib 9 stably abuts against the disc spring assembly 6. Due to the elasticity of the disc spring assembly 6, there is a certain amount of axial floating between the two adjacent sections of the flue body 1, which can meet the needs of the flue body 1 for slight axial expansion when high-temperature flue gas flows through it and slight axial contraction when it is in a low-temperature environment, thus providing good thermal stress protection for the flue body 1 itself. This can avoid sealing failure or pipe deformation caused by thermal expansion and contraction.

[0029] A reinforcing plate 10 is provided between the first mounting plate 2 and the second mounting plate 7 and the flue body 1 to improve the compressive strength of the first mounting plate 2 and the second mounting plate 7.

[0030] To prevent the flue body 1 from shifting vertically due to vibration or external force during long-term use, which could lead to loosening of the connection, two sets of diagonally distributed vertical locking components are provided at the bottom of the flue body 1 to achieve balanced locking.

[0031] The vertical locking component includes a positioning rod 13, which passes through the bottom of the flue body 1 and is rotatably connected to it. A pressure plate 11 is fixedly connected to one end of the positioning rod 13 inside the flue body 1, and a knob 15 is movably connected to the other end outside the flue body 1. The knob 15 can rotate the positioning rod 13 and the pressure plate 11. The pressure plate 11 has two working positions: in the first position, the pressure plate 11 is completely inside the current flue body 1, allowing the flue body 1 to move upwards for disassembly; in the second position, the pressure plate 11 rotates 90° and covers the mating area of ​​the two flue body sections 1 (i.e., partially pressing down on the ends of adjacent flue body sections 1), preventing the flue body 1 from moving upwards and ensuring a stable connection between the two flue body sections 1.

[0032] A guide plate 12 is integrally connected to the upper end of the pressure plate 11. The guide plate 12 is perpendicular to the pressure plate 11 and is shaped like a vertical blade. The guide plate 12 has a dual function: firstly, it serves as a reinforcing rib of the pressure plate 11 to improve its bending stiffness and load-bearing capacity; secondly, when the pressure plate 11 is in the second position (locked position), the guide plate 12 forms a certain angle with the flow direction of the flue gas inside the smoke pipe body 1. This angle actively guides the high-speed flue gas component flowing in the central area of ​​the smoke pipe body 1 into the dead zone at the corners of the smoke pipe body 1, so as to avoid the accumulation of pollutants at the corners of the rectangular pipe. At the same time, the flue gas introduced into the corner area carries away the accumulated dust and oil through continuous impact, giving the inside of the pipe a self-cleaning effect and reducing the maintenance frequency of the fire exhaust system.

[0033] The connection between the positioning rod 13 and the knob 15 is as follows: A light hole is provided on the knob 15, and the positioning rod 13 passes coaxially through this light hole, allowing the knob 15 to slide axially relative to the positioning rod 13. Multiple axially extending grooves 14 are provided on the circumferential surface of the positioning rod 13. A slider 16 corresponding to the groove 14 is integrally connected to the inner wall of the light hole. The slider 16 slides within the groove 14 to limit the circumferential rotation of the knob 15, thereby ensuring that the knob 15 can drive the positioning rod 13 to rotate synchronously, while also allowing the knob 15 to slide axially relative to the positioning rod 13.

[0034] A nut 17 is threaded onto the positioning rod 13, and the upper end of the nut 17 can abut against the knob 15. When assembling or disassembling the flue body 1, the nut 17 can be rotated first to move it downward, allowing the positioning rod 13 to gain axial displacement space, thereby pushing the positioning rod 13 upward and disengaging the pressure plate 11 from the inner wall of the flue body 1. At this time, rotating the positioning rod 13 is smoother, and additional rotational resistance caused by dirt adhering to the inner wall of the flue is avoided. After completing the assembly of the flue body 1 and adjusting the position of the pressure plate 11, the nut 17 is rotated again to move it upward and press against the knob 15. The knob 15 then presses against the outer wall of the flue body 1, so that the knob 15 and the pressure plate 11 together form a firm clamping and locking structure, stably fixing the two sections of the flue body 1 in the vertical direction.

[0035] The lower end of the pressure plate 11 is also provided with an elastic compensation component, which is a corrugated steel plate 18. Through its own elastic deformation, it can adaptively fit the micro-unevenness of the inner wall of the flue body 1, ensuring that the pressure plate 11 and the pipe wall always maintain good surface contact and reliable locking.

[0036] It should be noted that because the two sets of vertical locking components are arranged diagonally, after adjustment, it is essential to ensure that the tilt direction of the guide plate 12 can correctly guide the airflow into the corner area. Therefore, the connection position between the positioning rod 13 and the pressure plate 11 in the two sets of vertical locking components will vary depending on the installation position, but the overall structure and operating principle are exactly the same.

[0037] The specific operating principle of this device is as follows: First step: Align the ends of the two sections of the cigarette tube body 1, aligning each cone 5 at the end of the second section of the cigarette tube body 1 with the upper opening of the corresponding teardrop-shaped insertion hole 8 at the end of the first section of the cigarette tube body 1, and gently insert them one by one. After confirming that all cones 5 have entered the corresponding insertion holes 8, slowly lower the second section of the cigarette tube body 1, so that the insertion rod 4 and the cones 5 slide down synchronously along the insertion hole 8. During the downward movement, the cones 5 are gradually squeezed by the upper part of the rib 9 (thickness increases from top to bottom), producing a slight displacement in the horizontal direction, which drives the second section of the cigarette tube body 1 to move closer to the first section of the cigarette tube body 1, so that the sealing gasket of the mating surface of the two sections of the cigarette tube body 1 is gradually pressed tight. When the insertion rod 4 slides to the lowest position of the insertion hole 8, the disc spring assembly 6 is compressed to form a stable elastic preload, thus completing the horizontal insertion and locking.

[0038] The second step involves operating two sets of diagonally arranged vertical locking components. First, rotate nut 17 downwards to create axial displacement space for positioning rod 13. Then, push positioning rod 13 upwards to disengage pressure plate 11 from the inner wall of flue body 1. Next, rotate positioning rod 13 via knob 15 to rotate pressure plate 11 from the first position (completely inside the current flue body 1) to the second position, covering the mating area of ​​the two flue body sections 1. At this time, guide plate 12 rotates with pressure plate 11 to a preset angle with the flue gas flow direction. Finally, rotate nut 17 in the opposite direction to move it upwards, pressing against knob 15. Knob 15 then presses against the outer wall of flue body 1. Knob 15 and pressure plate 11 together form a strong clamping and locking structure, stabilizing the two flue body sections 1 vertically. The corrugated steel plate 18 at the lower end of pressure plate 11 adapts to the inner wall of flue body 1 through elastic deformation, compensating for unevenness caused by manufacturing errors.

[0039] Third step: After the device is put into operation, the high-temperature flue gas flows inside the flue pipe body 1. The disc spring assembly 6 continuously provides elastic preload. When the length of the pipe changes due to thermal expansion and contraction, the disc spring assembly 6 automatically compensates through compression or rebound, always maintaining the tightness of the sealing surface to prevent flue gas leakage. At the same time, the guide plate 12 actively guides the high-speed flue gas component flowing in the central area of ​​the pipe to the corner areas of the rectangular pipe, eliminating airflow dead zones, and using the impact of the flue gas to remove dust and oil accumulated at the corners, achieving self-cleaning of the pipe and reducing maintenance frequency.

[0040] Step 4: When the pipe needs to be disassembled for maintenance or modification, first operate the vertical locking component: rotate nut 17 downwards to release the clamping force on knob 15, and rotate pressure plate 11 from the second position back to the first position (completely retracted into the current flue body 1) through knob 15. Then lift the flue body 1 to be disassembled upwards, so that the insert rod 4 and cone 5 slide upwards along the insertion hole 8. The cone 5 gradually disengages from the compression of the rib 9, and the disc spring assembly 6 returns to its original position. When the cone 5 slides to the upper opening of the insertion hole 8, pull the flue body 1 outwards to completely disengage the cone 5 from the insertion hole 8, thus completing the disassembly (if there are adjacent pipes at both ends of the pipe to be disassembled, it will restrict its horizontal movement. In this case, the insert rod 4 can be disassembled directly).

[0041] The above are merely embodiments of the present invention and do not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A fire-fighting smoke exhaust duct, comprising a smoke duct body (1), wherein both ends of the smoke duct body (1) are provided with mounting plates, characterized in that, Also includes: Sub-connecting components, wherein there are multiple sets of sub-connecting components, which are disposed on an assembly plate at one end; A female connecting member, which corresponds to the number and position of the child connecting members and is disposed on the assembly plate at the other end, and can form a plug-in fit with the child connecting members; An elastic support member is disposed on the sub-connecting member and is used to provide elastic preload after the sub-connecting member and the mother connecting member are assembled. The vertical locking components are in two sets, which are diagonally distributed and set at the bottom of the flue body (1) to lock the vertical relative position of adjacent flue bodies (1); An elastic compensation component is provided on the vertical locking component for adaptively fitting the inner wall of the flue body (1).

2. The fire-fighting smoke exhaust duct according to claim 1, characterized in that, The sub-connecting component includes a first mounting plate (2), which is welded and fixed to the assembly plate. It has an integrally connected mounting seat (3), and the first mounting plate (2) has a threaded hole extending into the mounting seat (3) and is threadedly connected to a plug rod (4). The other end of the plug rod (4) is integrally connected to a cone head (5).

3. The fire-fighting smoke exhaust duct according to claim 2, characterized in that, The female connecting component includes a second mounting plate (7), which is welded and fixed to the assembly plate, and has a teardrop-shaped insertion hole (8) on it. The maximum diameter of the cone (5) is greater than the diameter of the lower opening of the insertion hole (8) and less than the diameter of the upper opening of the insertion hole (8), so that the cone (5) and the insertion rod (4) can be inserted along the upper opening of the insertion hole (8) and locked at the lower opening.

4. The fire-fighting smoke exhaust duct according to claim 3, characterized in that, The second mounting plate (7) is also fixed with a protruding rib (9) on one side. The protruding rib (9) is provided on the edge of the insertion hole (8) and is provided along its length. The rib (9) has two parts, upper and lower. The thickness of the upper part increases from top to bottom, while the thickness of the lower part remains constant and is equal to the maximum thickness of the upper part.

5. The fire-fighting smoke exhaust duct according to claim 4, characterized in that, The elastic support is a disc spring assembly (6), which is concentrically sleeved on the insert rod (4), with one end abutting against the cone head (5) and the other end abutting against the protruding rib (9).

6. The fire-fighting smoke exhaust duct according to claim 5, characterized in that, A reinforcing plate (10) is provided between the first mounting plate (2), the second mounting plate (7) and the flue body (1).

7. The fire-fighting smoke exhaust duct according to claim 6, characterized in that, The vertical locking component includes a positioning rod (13) rotatably mounted on the flue body (1). One end of the positioning rod (13) inside the flue body (1) is fixed with a pressure plate (11), and the other end outside the flue body (1) is movably connected with a knob (15). The pressure plate (11) can be rotated to cover the docking area of ​​the adjacent flue body (1).

8. The fire-fighting smoke exhaust duct according to claim 7, characterized in that, The upper end of the pressure plate (11) is vertically fixed with a guide plate (12) to direct the flue gas flowing in the middle of the flue body (1) to the bottom corner area of ​​the flue body (1).

9. The fire-fighting smoke exhaust duct according to claim 8, characterized in that, The knob (15) has a light hole, the positioning rod (13) passes through the light hole concentrically, and an axially extending groove (14) is provided on the circumferential surface of the positioning rod (13), while the inner wall of the knob (15) is provided with a slider (16) that slides in cooperation with the groove (14). A nut (17) is also threaded onto the positioning rod (13), and the nut (17) abuts against the end of the knob (15).

10. The fire-fighting smoke exhaust duct according to claim 9, characterized in that, The elastic compensation component is a corrugated steel plate (18) fixed to the lower end of the pressure plate (11).

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