A smoke generating device for hot smoke test

Abstract

The present invention discloses a smoke-generating device for a hot smoke test, which relates to the technical field of hot smoke test equipment and includes a smoke-generating furnace, a combustion mechanism, and a feeding mechanism. The smoke-generating furnace is a rectangular cylindrical structure, and a smoke guide pipe is connected to the upper end of the smoke-generating furnace. The combustion mechanism is arranged in the middle of the smoke-generating furnace and includes a rotating shaft rotatably arranged on the smoke-generating furnace, four combustion meshes are fixedly arranged on the rotating shaft, and electric heating wires are fixedly arranged on the combustion meshes. The smoke-generating furnace is provided with a drive motor, and the shaft end of the drive motor is transmission-connected to the rotating shaft. The feeding mechanism includes a feeding bin fixed on the smoke-generating furnace, a vertical feeding channel and a storage grid connected to the feeding channel are provided in the feeding bin, and the feeding channel is connected to the smoke-generating furnace, and the smoke cakes in the storage grid can be sequentially fed into the smoke-generating furnace. The present invention provides a smoke-generating device for a hot smoke test that can feed smoke cakes in batches to ensure continuous smoke generation and high smoke generation efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of hot smoke test equipment, in particular to a smoke generating device for hot smoke testing. Background Art

[0002] The purpose of the hot smoke test is to examine the smoke control capability of the smoke control system under fire conditions by generating a certain amount of smoke from a test fire source during the debugging process of the building's smoke control system.

[0003] According to Section 5.3.8 of the Fire Protection Standard "Hot Smoke Test Method for Field Verification of Smoke Control System Performance" (XF / T999-2012), tracer smoke must be continuously injected into the hot smoke plume. The amount of smoke injected must ensure that the tracer smoke can fully demonstrate the hot smoke layer produced by ethanol combustion. Furthermore, for the safety of on-site test personnel, they must maintain a safe distance from the hot smoke test equipment.

[0004] However, the existing smoke-generating device has a simple structure. During the test, the smoke cakes added at one time can only burn continuously for 2-3 minutes. Therefore, the test personnel need to continuously add smoke cakes to ensure continuous smoke generation, which is extremely inconvenient to operate. The device that is constantly approaching the hot smoke test cannot guarantee the safety of the test personnel. Summary of the Invention

[0005] The purpose of the present invention is to provide a smoke-generating device for hot smoke testing, which uses a combustion mesh that can rotate with the rotating shaft to hold smoke cakes. When the combustion mesh rotates, the feeding bin can drop the smoke cakes onto the combustion mesh in batches, so that the test personnel do not need to approach the smoke-generating device to manually drop the smoke cakes, which has high safety.

[0006] The above technical objectives of the present invention are achieved through the following technical solutions:

[0007] A smoke generating device for hot smoke testing, comprising a smoke generating furnace, a combustion mechanism and a feeding mechanism;

[0008] The smoke furnace is a rectangular cylindrical structure, and the upper end of the smoke furnace is connected to a smoke guide pipe;

[0009] The combustion mechanism is arranged in the middle of the smoking stove, including a rotating shaft rotatably arranged on the smoking stove, four combustion meshes are fixedly arranged on the rotating shaft, heating wires are fixedly arranged on the combustion meshes, a driving motor is provided on the smoking stove, a driven gear is rotatably arranged on the smoking stove, a transmission gear meshed with the driven gear is fixedly provided on the rotating shaft, and a belt transmission mechanism is provided between the shaft end of the driving motor and the driven gear;

[0010] The feeding mechanism includes a feeding bin fixed on the smoking furnace, a vertical feeding channel and a storage grid connected to the feeding channel are provided in the feeding bin, the feeding channel is connected to the smoking furnace, the storage grid is inclined and an isolation door is hingedly provided on one side connected to the feeding channel, a baffle is slidably provided in the feeding bin, the baffle abuts against the isolation door, a rack is fixed to the lower end of the baffle, and the rack is meshed with the driven gear.

[0011] By adopting the above technical solution, a certain number of cigarette cakes are pre-placed into each storage compartment according to demand. The cigarette cakes will slide down the inclined storage compartment and hit the isolation door, which is prevented from opening due to the restraining force of the barrier rod. When the cigarette cakes are released, the drive motor is activated, driving the shaft to rotate 90 degrees. Simultaneously, the rack drives the barrier rod downward, after being driven by the transmission gear and the driven gear. Because the upper end of the barrier rod always limits the uppermost isolation door, when the upper end of the barrier rod descends to the lower side of the isolation door, the isolation door will open, releasing the cigarette cakes. At this point, the shaft has stopped rotating and the combustion mesh is in place. The cigarette cakes will fall to the upper side of the combustion mesh near the driven gear, where they will smolder. Due to the chimney effect, the smoke from the cigarette cakes will be discharged through the upper end of the smoke guide tube.

[0012] When this batch of cigarette cakes is about to burn out and the amount of smoke produced has decreased, the drive motor is started again, causing the shaft to rotate 90 degrees, rotating the cigarette cakes that are about to burn out to an area on the combustion mesh away from the driven gear, so that this batch of cigarette cakes is burned out. During the transfer process, this batch of cigarette cakes can be fully stirred and burned. A new batch of cigarette cakes will fall on the side of the combustion mesh close to the driven gear and burn. When the cigarette cakes are added again, the earliest batch of cigarette cakes will fall to the bottom of the smoke furnace under the rotation of the combustion mesh, thereby preventing the accumulation of burnt cigarette cakes from affecting the combustion of the remaining cigarette cakes. This smoke-generating device enables the smoke furnace to continuously generate smoke without the need for test personnel to approach, effectively ensuring the safety of test personnel. The burned cigarette cakes, unburned cigarette cakes, and cigarette cakes to be burned are separated, effectively improving the efficiency of combustion and smoke generation, and having high reliability.

[0013] The present invention is further configured as follows: an arc-shaped baffle is fixedly provided on a side of the combustion mesh away from the rotating shaft, and the baffle is located on the forward side of the combustion mesh when it rotates.

[0014] By adopting the above technical solution, the arc-shaped baffle is used to limit the smoke cake, preventing the smoke cake from falling from the gap between the combustion mesh and the smoke furnace during the rotation of the combustion mesh driven by the rotating shaft, thereby effectively improving the reliability of the smoke-generating device.

[0015] The present invention is further configured as follows: a water trough is slidably provided at the lower portion of the smoke-generating furnace, and a motor slot is provided on the lower side wall of the water trough.

[0016] By adopting the above technical solution, cooling water is injected into the water tank during use, which can protect the drive motor and prevent damage to the drive motor caused by the high temperature at the test site. At the same time, the remaining residue of the burned cigarette cake can also fall into the water tank, thereby collecting the remaining cigarette cake.

[0017] The present invention is further configured as follows: a vertical smoke outlet pipe is fixed to one end of the smoke guide pipe away from the smoke furnace, a drainage pipe is sleeved on the outer side of the smoke outlet pipe, and the upper end of the drainage pipe is flush with the upper end of the smoke outlet pipe.

[0018] By adopting this technical solution, the smoke outlet pipe is used to guide the smoke flow upward, while the draft tube is used to guide the hot air flow generated by the fire source below upward during the hot smoke test. First, the hot air flow itself heats the smoke guide and smoke outlet pipes, exacerbating the chimney effect and increasing the smoke flow velocity within the smoke guide pipe. Second, when the hot air flows out from the upper end of the draft tube, it drives the smoke flow in the smoke outlet pipe upward, further accelerating the air flow velocity in the smoke guide pipe and improving the smoke generation efficiency of the smoke generating device.

[0019] The present invention is further configured as follows: funnel-shaped expanders are fixedly provided at both upper and lower ends of the drainage pipe, and a flow expansion funnel is fixedly provided at the upper end of the smoke outlet pipe.

[0020] By adopting the above technical solution, the expander at the lower end of the drainage pipe can concentrate the hot air flow, so that the pressure of the hot air flow in the drainage pipe is higher. The expander and the expansion funnel at the upper end of the drainage pipe can make the hot air flow diverge to the surroundings, thereby reducing the pressure of the smoke flow in the expansion funnel, forming a low-pressure area there, and promoting the acceleration of the smoke flow in the smoke guide pipe.

[0021] The present invention is further configured such that: a plurality of vertically arranged partitions are fixedly connected between the drainage pipe and the smoke outlet pipe.

[0022] By adopting the above technical solution, the partition plays the role of connecting the drainage pipe and the smoke outlet pipe, and at the same time can guide the hot air flow to flow vertically upwards.

[0023] The present invention is further configured as follows: a rotating ring is rotatably provided on the upper side of the smoke outlet pipe, and blades are fixedly provided on both the inner and outer sides of the rotating ring.

[0024] By adopting the above technical solution, the hot air flow will push the rotating ring to rotate through the blades during the upward flow. When the rotating ring rotates, the inner blades will cause the smoke flow to accelerate, thereby improving the smoke generation efficiency of the smoke generation device.

[0025] The present invention is further configured as follows: a one-way valve is provided at the connection between the feeding channel and the smoke-generating furnace, the one-way valve includes a valve plate, a pin is fixed to the middle of the two opposite sides of the valve plate, the pin is rotatably connected to the side wall of the smoke-generating furnace, a counterweight is fixed on the upper side of the valve plate, two limit plates are also provided on one side of the feeding channel, and the upper side of the valve plate is located between the two limit plates.

[0026] By adopting the above technical solution, the one-way valve can close the connection between the feeding channel and the smoke furnace, so that the smoke in the smoke furnace cannot enter the feeding channel, avoiding the accumulation of smoke in the feeding channel.

[0027] The present invention is further configured such that: the feeding bin is opened on one side away from the smoke-generating furnace and is hingedly provided with a feeding door.

[0028] By adopting the above technical solution, the feeding door can facilitate the test personnel to put the cigarette cakes into the feeding bin.

[0029] The present invention is further configured such that an air inlet is provided at the lower portion of the smoke generating stove.

[0030] By adopting the above technical solution, the air inlet can increase the air intake volume and improve the combustion efficiency of the smoke cake.

[0031] In summary, the beneficial technical effects of the present invention are:

[0032] (1) The present invention uses a combustion mesh that can rotate with the rotating shaft to hold the smoke cakes. When the combustion mesh rotates, the feeding bin can drop the smoke cakes onto the combustion mesh in batches, thereby eliminating the need for test personnel to manually drop the smoke cakes near the smoke generating device, which is highly safe.

[0033] (2) The combustion mesh of the present invention separates the burned smoke cakes, the unburned smoke cakes and the smoke cakes to be burned, and the combustion mesh can stir the smoke cakes when turning over, ensuring that the smoke cakes can be fully burned, thereby improving the combustion and smoke generation efficiency of the smoke cakes;

[0034] (3) The present invention utilizes the draft tube and the smoke outlet tube to guide the hot air flow and the smoke flow in layers, thereby expanding the chimney effect. At the same time, the hot air flow is used to accelerate the flow of the smoke flow, and the kinetic energy of the hot air flow is transferred to the smoke flow through the rotating ring and the blades on both sides thereof, thereby further increasing the flow velocity of the smoke flow. At the same time, the air inlet is used to accelerate the gas flow rate in the smoke furnace, thereby improving the smoke generation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present invention;

[0036] Figure 2 is a cross-sectional view of a smoke outlet pipe according to an embodiment of the present invention;

[0037] Figure 3 is a cross-sectional view of a smoke furnace according to one embodiment of the present invention;

[0038] Figure 4 It is a cross-sectional view of a water tank in one embodiment of the present invention, mainly showing the installation structure of the water tank and the drive motor;

[0039] Figure 5 yes Figure 1 A partial enlarged view of point A in the middle.

[0040] Figure numerals: 1, smoke furnace; 2, smoke guide pipe; 3, smoke outlet pipe; 4, expansion funnel; 5, swivel; 6, blade; 7, partition; 8, drainage pipe; 9, expander; 10, rotating shaft; 11, combustion mesh; 12, heating wire; 13, baffle; 14, driving motor; 15, feeding door; 16, transmission gear; 17, valve plate; 18, water tank; 19, motor slot; 20, air inlet; 21, feeding bin; 22, feeding channel; 23, storage grid; 24, feeding plate; 25, isolation door; 26, baffle; 27, rack; 28, driven gear; 29, belt transmission mechanism; 30, pin shaft; 31, counterweight; 32, limit plate. DETAILED DESCRIPTION

[0041] The present invention will be described clearly and completely below with reference to the embodiments.

[0042] See attached Figure 1 A smoke generating device for hot smoke test includes a smoke generating furnace 1, a combustion mechanism and a feeding mechanism.

[0043] The smoke furnace 1 is a rectangular cylindrical structure. The upper end of the smoke furnace 1 is connected to a slanted smoke guide pipe 2. A vertical smoke outlet pipe 3 is fixed to the end of the smoke guide pipe 2 away from the smoke furnace 1. Figure 2 A diffuser funnel 4 is fixedly mounted on the upper end of the smoke outlet pipe 3. A swivel 5 is rotatably mounted on the upper end of the diffuser funnel 4. Vanes 6 are fixedly mounted on both the inner and outer sides of the swivel 5. Several vertical baffles 7 are fixedly mounted on the outer side of the smoke outlet pipe 3. The baffles 7 are evenly distributed along the circumference of the smoke outlet pipe 3. A drainage pipe 8 is also sleeved on the outer side of the smoke outlet pipe 3. The drainage pipe 8 is fixedly connected to the baffles 7. The upper end of the drainage pipe 8 is flush with the upper end of the smoke outlet pipe 3, while the lower end of the drainage pipe 8 is lower than the lower end of the smoke outlet pipe 3. Funnel-shaped expanders 9 are fixedly mounted on both the upper and lower ends of the drainage pipe 8.

[0044] First, the hot air flow itself heats the smoke guide duct 2 and the smoke outlet duct 3, exacerbating the chimney effect and increasing the velocity of the smoke flow within the smoke guide duct 2. Second, the expander 9 at the lower end of the guide duct 8 concentrates the hot air flow, increasing the pressure of the hot air flow within the guide duct 8. The expander 9 and the diffusion funnel 4 at the upper end of the guide duct 8 disperse the hot air flow in all directions, thereby reducing the pressure of the smoke flow in the diffusion funnel 4 and forming a low-pressure area there, accelerating the flow of smoke within the smoke guide duct 2. Finally, as the hot air flows upward, the blades 6 push the swivel 5 to rotate. This rotation of the swivel 5 accelerates the flow of smoke through the inner blades 6, improving the smoke generation efficiency of the smoke generating device.

[0045] See attached Figure 3 The combustion mechanism is arranged in the middle of the smoke furnace 1, including a rotating shaft 10 rotatably arranged on the smoke furnace 1, four combustion meshes 11 are fixedly arranged on the rotating shaft 10, and electric heating wires 12 are fixedly arranged on the combustion meshes 11. An arc-shaped baffle 13 is fixedly arranged on the side of the combustion meshes 11 away from the rotating shaft 10, and the baffle 13 is located on the forward side of the combustion meshes 11 when rotating. Figure 4 and attached Figure 5 A drive motor 14 is fixedly installed inside the smoke stove 1. A drawer-shaped water tank 18 is slidably installed at the lower part of the smoke stove 1. A motor slot 19 is opened on the side wall of the water tank 18. The drive motor 14 is located in the motor slot 19. An air inlet 20 is also opened at the lower part of the smoke stove 1.

[0046] During use, cooling water is injected into the water tank 18 to protect the drive motor 14 and prevent the high temperature at the test site from damaging the drive motor 14. At the same time, the burnt cigarette residue can also fall into the water tank 18, thereby collecting the cigarette residue.

[0047] The feeding mechanism includes a feeding bin 21 fixed on the smoke furnace 1, Figure 3 A vertical feeding channel 22 is provided in the feeding bin 21. A one-way valve is provided at the connection between the feeding channel 22 and the smoke-generating furnace 1. The one-way valve includes a valve plate 17. A pin 30 is fixed to the middle of the two opposite sides of the valve plate 17. The pin 30 is rotatably connected to the side wall of the smoke-generating furnace 1. A counterweight 31 is fixed to the upper side of the valve plate 17. Two limit plates 32 are also provided on one side of the feeding channel 22. The upper side of the valve plate 17 is located between the two limit plates 32. The one-way valve can seal the connection between the feeding channel 22 and the smoke-generating furnace 1, thereby preventing smoke from the smoke-generating furnace 1 from entering the feeding channel 22 and preventing smoke from accumulating in the feeding channel 22.

[0048] Two inclined material plates 24 are fixedly provided in the feeding bin 21. The material plates 24 separate the feeding bin 21 into three storage grids 23 connected to the feeding channel 22. An isolation door 25 is provided on one side of each storage grid 23 connected to the feeding channel 22. The upper side of the isolation door 25 is hinged to the corresponding material plate 24 or the feeding bin 21. A baffle rod 26 is provided in the feeding bin 21. The baffle rod 26 is slidably matched with the feeding bin 21 and the material plate 24. The baffle rod abuts against the isolation door 25. A rack 27 is fixed to the lower end of the baffle rod 26. A driven gear 28 meshing with the rack 27 is rotatably provided on the smoking furnace 1. A transmission gear 16 meshing with the driven gear 28 is fixed on the rotating shaft 10. A belt transmission mechanism 29 is provided between the shaft end of the drive motor 14 and the driven gear 28. The feeding bin 21 is opened on one side away from the smoke generating furnace 1 and is hingedly provided with a feeding door 15. The feeding door 15 is fixed to the feeding bin 21 with a lock, which can facilitate the test personnel to put tobacco cakes into the feeding bin 21 in advance and prevent smoke from spreading out of the feeding bin 21.

[0049] The working principle of this embodiment is as follows: before the test begins, the tester places a certain amount of tobacco cakes into the storage compartment 23. During the test, the drive motor 14 can be remotely controlled by the tester or started by a timer. First, the shaft 10 rotates 90 degrees under the drive of the drive motor 14, and the rack 27 drives the baffle 26 to move downward synchronously. After the shaft 10 rotates 90 degrees, the upper end of the baffle 26 just reaches the lower side of the uppermost isolation door 25. After the isolation door 25 is no longer restricted by the baffle 26, it releases the tobacco cakes in the corresponding storage compartment 23, and the tobacco cakes fall onto the combustion mesh 11 and are ignited by the heating wire 12. When the batch of tobacco cakes is about to burn out, the shaft 10 rotates 90 degrees again, thereby transferring the tobacco cakes from the side of the combustion mesh 11 close to the driven gear 28 to the side away from the driven gear 28, where the tobacco cakes continue to burn, while new tobacco cakes fall onto the side of the combustion mesh 11 close to the driven gear 28. After the rotating shaft 10 rotates 90 degrees again, the fully burned cigarette cake residue will be thrown into the water tank 18 and the cycle will continue.

[0050] The advantage of this is that the smoke cakes can be put into the smoke furnace 1 in batches, without the need for test personnel to manually add materials, which is safer. In addition, the burned smoke cakes, unburned smoke cakes and smoke cakes to be burned are separated, so that the smoke cakes are fully burned and the smoke generation efficiency is high.

[0051] The above description is only a preferred embodiment of the present invention and does not limit the scope of protection of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the scope of protection of the present invention.

Claims

1. A smoking device for hot smoke testing, characterized by: It includes a smoke furnace (1), a combustion mechanism and a feeding mechanism; The smoke-generating furnace (1) is a rectangular cylindrical structure, and a smoke guide pipe (2) is provided at the upper end of the smoke-generating furnace (1); The combustion mechanism is arranged in the middle of the smoke-generating furnace (1), including a rotating shaft (10) rotatably arranged on the smoke-generating furnace (1), four combustion meshes (11) are fixedly arranged on the rotating shaft (10), and a heating wire (12) is fixedly arranged on the combustion meshes (11), a driving motor (14) is arranged on the smoke-generating furnace (1), a driven gear (28) is rotatably arranged on the smoke-generating furnace (1), a transmission gear (16) meshing with the driven gear (28) is fixedly arranged on the rotating shaft (10), and a belt transmission mechanism (29) is arranged between the shaft end of the driving motor (14) and the driven gear (28); The feeding mechanism comprises a feeding bin (21) fixed on the smoke-generating furnace (1), a vertical feeding channel (22) and a storage grid (23) connected to the feeding channel (22) are provided in the feeding bin (21), the feeding channel (22) is connected to the smoke-generating furnace (1), the storage grid (23) is inclined and an isolation door (25) is hingedly provided on one side of the storage grid (23) connected to the feeding channel (22), a blocking rod (26) is slidably provided in the feeding bin (21), the blocking rod abuts against the isolation door (25), a rack (27) is fixed to the lower end of the blocking rod (26), and the rack (27) is meshed with a driven gear (28).

2. A smoking device for hot smoke testing according to claim 1, characterized in that: An arc-shaped baffle (13) is fixedly provided on one side of the combustion mesh (11) away from the rotating shaft (10), and the baffle (13) is located on the forward side of the combustion mesh (11) when it rotates.

3. The smoking device for hot smoke testing according to claim 1, characterized in that: A water trough (18) is slidably provided at the lower portion of the smoke furnace (1), and a motor slot (19) is provided on the bottom side wall of the water trough (18).

4. The smoking device for hot smoke testing according to claim 1, characterized in that: A vertical smoke outlet pipe (3) is fixed to one end of the smoke guide pipe (2) away from the smoke furnace (1), and a drainage pipe (8) is sleeved on the outer side of the smoke outlet pipe (3), and the upper end of the drainage pipe (8) is flush with the upper end of the smoke outlet pipe (3).

5. The smoking device for hot smoke testing according to claim 4, characterized in that: Funnel-shaped expanders (9) are fixedly provided at both the upper and lower ends of the drainage pipe (8), and a flow expansion funnel (4) is fixedly provided at the upper end of the smoke outlet pipe (3).

6. The smoking device for hot smoke testing according to claim 4, characterized in that: A plurality of vertically arranged partitions (7) are fixedly connected between the drainage pipe (8) and the smoke outlet pipe (3).

7. The smoking device for hot smoke testing according to claim 4, characterized in that: A rotating ring (5) is rotatably provided on the upper side of the smoke outlet pipe (3), and blades (6) are fixedly provided on both the inner and outer sides of the rotating ring (5).

8. The smoking device for hot smoke testing according to claim 1, characterized in that: A one-way valve is provided at the connection between the feeding channel (22) and the smoke-generating furnace (1), and the one-way valve includes a valve plate (17). Pins (30) are fixed in the middle of two opposite sides of the valve plate (17), and the pins (30) are rotatably connected to the side wall of the smoke-generating furnace (1). A counterweight (31) is fixed on the upper side of the valve plate (17). Two limit plates (32) are also provided on one side of the feeding channel (22), and the upper side of the valve plate (17) is located between the two limit plates (32).

9. The smoking device for hot smoke testing according to claim 1, characterized in that: The feeding bin (21) is open on one side away from the smoke furnace (1) and is hingedly provided with a feeding door (15).

10. The smoking device for hot smoke testing according to claim 1, characterized in that: An air inlet (20) is provided at the lower portion of the smoke furnace (1).

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