High-efficiency early-warning smoke exhaust system for public area of subway station

Abstract

The invention belongs to the technical field of subway fire early warning, and particularly relates to a subway station public area efficient early warning smoke exhaust system which comprises an air pipe, an axial flow fan, a water tank, a booster water pump, a pipe wall spray head, a filter screen, a rotary scraper and a plate wall spray head. The axial flow fan is installed in the air pipe, the water tank and the booster water pump are both arranged at the top of the air pipe, the multiple pipe wall nozzles are arranged on the inner wall face of the air inlet end of the air pipe at equal intervals in the circumferential direction, the filter screen is arranged in the air outlet end of the air pipe, and the rotary scraper is rotationally arranged on the side face, facing the air inlet end, of the filter screen. The axial flow fan is located between the pipe wall nozzle and the rotary scraper blade in the length direction of the air pipe, and the plate wall nozzle is arranged on the rotary scraper blade. According to the invention, when early warning of fire occurs, discharged flue gas is cooled and filtered, and meanwhile, the filter screen can be washed and cleaned in real time, so that a better flue gas treatment effect and liquidity are kept.

Description

Technical Field

[0001] The present invention relates to the technical field of subway fire early warning; in particular, the present invention relates to a high-efficiency early warning smoke exhaust system for a public area of ​​a subway station. Background Art

[0002] Subway is a fast, high-capacity, electric-powered rail transit system built in the city. Trains run on fully enclosed lines. Lines in the central urban area are basically located in underground tunnels, and lines outside the central urban area are generally located on viaducts or on the ground. Subway is a high-density, high-capacity urban rail transit system that covers all kinds of underground and above-ground road rights in urban areas. Due to the large number of people in the subway, fire monitoring and early warning in the subway is very important.

[0003] However, the existing subway station fire warning system is relatively simple, lacks a corresponding smoke exhaust mechanism, and is unable to exhaust fire smoke in a timely and rapid manner, thus affecting the application effect of the warning system. Summary of the invention

[0004] In view of this, the present invention provides a high-efficiency early warning smoke exhaust system for public areas of subway stations, thereby solving or at least alleviating the above-mentioned problems existing in the prior art.

[0005] In order to achieve the aforementioned objectives, the present invention provides a high-efficiency early warning smoke exhaust system for a public area of ​​a subway station, comprising an air duct, an axial flow fan, a water tank, a booster pump, a pipe wall nozzle, a filter, a rotary scraper and a plate wall nozzle, wherein the air duct is connected to the tail end of an exhaust duct in a public area of ​​a subway station for exhausting smoke, the axial flow fan is installed inside the air duct, the water tank and the booster pump are both arranged on the top of the air duct, a plurality of pipe wall nozzles are equidistantly arranged on the inner wall surface of the air inlet end of the air duct along the circumferential direction, the filter is arranged in the air outlet end of the air duct, the rotary scraper is rotatably arranged on a side of the filter facing the air inlet end, the axial flow fan is located between the pipe wall nozzle and the rotary scraper in the length direction of the air duct, and the plate wall nozzle is arranged on the rotary scraper for flushing the filter.

[0006] In a high-efficiency early warning smoke exhaust system in a public area of ​​a subway station as described above, optionally, a first ring sleeve is provided at the air inlet end of the air duct, the pipe wall nozzle is penetrated and arranged on the first ring sleeve, and the outer end of the pipe wall nozzle is connected to a first water diversion pipe, and the first water diversion pipe is connected to the drainage end of the booster water pump.

[0007] In a high-efficiency early warning smoke exhaust system in a public area of ​​a subway station as described above, optionally, the first water supply pipe includes a first straight pipe and first arc-shaped pipes connected to both sides of one end of the first straight pipe close to the first ring sleeve, and the two first arc-shaped pipes are both covered and arranged on the surface of the first ring sleeve.

[0008] In a high-efficiency early warning smoke exhaust system in a public area of ​​a subway station as described above, optionally, a second ring sleeve is provided at the air outlet end of the air duct, a water diversion chamber is provided in the second ring sleeve, a swivel is rotatably installed in the water diversion chamber, the outer end of the rotating scraper is fixedly installed on the inner surface of the swivel, the outer end of the second water diversion pipe is connected to the water diversion chamber, a second water diversion pipe is connected to the second ring sleeve, the water outlet end of the second water diversion pipe is connected to the water diversion chamber, and the water inlet end of the second water diversion pipe is connected to the water outlet end of an additional water pump, a third water diversion pipe is installed in the rotating scraper, and the panel wall nozzle is connected to the third water diversion pipe.

[0009] In a high-efficiency early warning smoke exhaust system in a public area of ​​a subway station as described above, optionally, the cross-section of the swivel is "L"-shaped, a plurality of water diversion plates symmetrically distributed in the center are provided on the surface of the swivel, a water inlet cavity is provided in the water diversion plate, a water inlet hole is provided on the side surface of the water diversion plate corresponding to the opposite direction of rotation of the swivel, the outer end of the third water diversion pipe is connected to the water inlet cavity, and the side surface and the inner side surface of the water diversion plate facing the filter are respectively connected to the two side surfaces of the swivel, and the water outlet end of the second water diversion pipe is axially located in the area of ​​the water diversion plate.

[0010] In a high-efficiency early warning smoke exhaust system for a public area of ​​a subway station as described above, optionally, the second water diversion pipe includes a second straight pipe and a second arc-shaped pipe, the bottom end of the second arc-shaped pipe tangentially penetrates the second annulus and communicates with the water diversion cavity, the water outlet end of the second straight pipe is connected to the second straight pipe, and the water inlet end of the second straight pipe is connected to the water outlet end of the booster water pump.

[0011] In a high-efficiency early warning smoke exhaust system in a public area of ​​a subway station as described above, optionally, a notch is provided on a side of the rotating scraper facing the filter, an inner wall of the notch on a side away from the filter is parallel to the vertical plane, an angle between the bottom inner wall of the notch and the vertical plane is an obtuse angle, and the panel wall nozzle is provided at the connection of the inner wall surfaces on both sides of the notch.

[0012] In a high-efficiency early warning smoke exhaust system in a public area of ​​a subway station as described above, optionally, the filter includes a ring body part and a mesh body part, and the ring body part is fixedly arranged on the inner surface of the second ring sleeve, and the inner diameters of the ring body part, the swivel ring, the second ring sleeve and the air duct are the same.

[0013] In the aforementioned efficient early warning smoke exhaust system for public areas of subway stations, optionally, an extension pipe is connected to an end face of the second ring sleeve away from the air duct, a sewage pipe is connected to the bottom of the extension pipe, and a row of grille plates is provided at one end of the extension ring away from the second ring sleeve.

[0014] The high-efficiency early warning smoke exhaust system for the public area of ​​a subway station of the present invention adopts the cooperation of a pipe wall nozzle, a plate wall nozzle and a filter screen, and can realize cooling and filtering the smoke before discharging it when a fire warning is given, and a rotating scraper can flush the filter screen in real time, and effectively remove the impurities and sewage generated after flushing from the filter screen, thereby ensuring that the filter screen is in a better unblocked state, facilitating the discharge and circulation of the smoke, and improving the treatment effect of the smoke under fire warning. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The disclosure of the present invention will become more apparent with reference to the accompanying drawings. It should be understood that these drawings are only for illustrative purposes and are not intended to limit the scope of protection of the present invention. In the drawings:

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0017] Figure 2 For the present invention Figure 1 Rear view of.

[0018] Figure 3 It is a schematic diagram of the filter screen of the present invention on the second ring sleeve.

[0019] Figure 4 It is a schematic diagram of the extension pipe and the sewage pipe of the present invention.

[0020] Figure 5 It is a schematic diagram of the second ring sleeve and the rotating scraper of the present invention.

[0021] Figure 6 It is a schematic diagram of the rotary scraper and rotating ring of the present invention.

[0022] Figure 7 For the present invention Figure 6 Schematic diagram of the transfer ring after being cut open.

[0023] Figure 8 For the present invention Figure 5 Schematic diagram of the second ring after being cut open.

[0024] Fig. 9 Schematic diagram of the water inlet chamber of the present invention.

[0025] Figure markings: 1-air duct; 2-axial flow fan; 3-water tank; 4-boosting water pump; 5-pipe wall nozzle; 6-filter screen; 6.1-ring body part; 6.2-mesh body part; 7-scraper; 8-plate wall nozzle; 9-first ring sleeve; 10-first water diversion pipe; 10.1-first straight pipe; 10.2-first arc pipe; 11-second ring sleeve; 12-water diversion chamber; 13-swivel; 14-second water diversion pipe; 14.1-second straight pipe; 14.2-second arc pipe; 15-third water diversion pipe; 16-water diversion plate; 17-water inlet chamber; 18-water inlet hole; 19-notch; 20-extension pipe; 21-drain pipe; 22-grating plate. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] As Figures 1 to 9 As shown, the present invention provides a high-efficiency early warning smoke exhaust system for a public area of ​​a subway station, comprising an air duct 1, an axial flow fan 2, a water tank 3, a booster pump 4, a pipe wall nozzle 5, a filter screen 6, a rotary scraper 7 and a board wall nozzle 8. The air duct 1 is connected to the tail end of the exhaust duct 1 in the public area of ​​the subway station for exhausting smoke, the axial flow fan 2 is installed inside the air duct 1, the water tank 3 and the booster pump 4 are both arranged on the top of the air duct 1, a plurality of pipe wall nozzles 5 are equidistantly arranged on the inner wall surface of the air inlet end of the air duct 1 along the circumferential direction, the filter screen 6 is arranged in the air outlet end of the air duct 1, the rotary scraper 7 is rotatably arranged on a side of the filter screen 6 facing the air inlet end, the axial flow fan 2 is located between the pipe wall nozzle 5 and the rotary scraper 7 in the length direction of the air duct 1, and the board wall nozzle 8 is arranged on the rotary scraper 7 for flushing the filter screen 6.

[0028] In this embodiment, when a fire warning occurs, the booster pump 4 is turned on, and the pipe wall nozzle 5 sprays water mist, which can cool the smoke extracted by the axial flow fan 2. After the smoke passes through the axial flow fan 2 and is filtered by the filter 6, the water mist sprayed by the plate wall nozzle 8 can further cool the smoke and flush the filter 6 to achieve rapid impurity removal of the filter 6, thereby improving the filtering performance of the filter 6 and the fluidity of the smoke. At the same time, the rotary scraper 7 can cooperate with the plate wall nozzle 8 to perform impurity removal on the filter 6 while flushing and scraping, further improving the filtering performance of the filter 6 and the fluidity of the smoke, and ensuring efficient extraction and discharge of the smoke.

[0029] The air inlet end of the air duct 1 is provided with a first ring sleeve 9, the pipe wall nozzle 5 is penetrated and arranged on the first ring sleeve 9, and the outer end of the pipe wall nozzle 5 is connected with a first water diversion pipe 10, and the first water diversion pipe 10 is connected to the drainage end of the booster water pump 4. The first ring sleeve 9 is fixedly sleeved on the air inlet end of the air duct 1, and serves as the installation body of the pipe wall nozzle 5.

[0030] In this embodiment, the first water supply pipe 10 includes a first straight pipe 10.1 and first arc-shaped pipes 10.2 connected to both sides of one end of the first straight pipe 10.1 close to the first ring sleeve 9, and the two first arc-shaped pipes 10.2 are both covered and arranged on the surface of the first ring sleeve 9. The first straight pipe 10.1 introduces water into the first arc-shaped pipe 10.2, and the water enters each pipe wall nozzle 5 after passing through the first arc-shaped pipe 10.2. The pipe wall nozzle 5 is distributed symmetrically around the center, so that the air inlet end of the air duct 1 is fully covered in the circumferential direction and sprayed with water mist, which has a strong cooling effect. At the same time, the water mist can be quickly drawn out of the air duct 1 under the action of the axial flow fan 2.

[0031] A second ring sleeve 11 is provided at the air outlet end of the air duct 1, a water diversion chamber 12 is provided in the second ring sleeve 11, a swivel 13 is rotatably installed in the water diversion chamber 12, the outer end of the rotary scraper 7 is fixedly installed on the inner surface of the swivel 13, the outer end of the second water diversion pipe 14 is connected to the water diversion chamber 12, the second ring sleeve 11 is connected to the second water diversion pipe 14, the water outlet end of the second water diversion pipe 14 is connected to the water diversion chamber 12, and the water inlet end of the second water diversion pipe 14 is connected to the water outlet end of the additional water pump, a third water diversion pipe 15 is installed in the rotary scraper 7, and the plate wall nozzle 8 is connected to the third water diversion pipe 15.

[0032] In this embodiment, the second water inlet pipe 14 introduces water into the water inlet chamber 12. The water in the water inlet chamber 12 enters the third water inlet pipe 15 under pressure. After that, the water enters the plate wall nozzle 8 through the third water inlet pipe 15 and is sprayed out in the form of water mist. At this time, not only can the exhaust flue gas be cooled for a second time, but the water mist sprayed from the plate wall nozzle can also flush the filter screen 6, realize the real-time cleaning of the filter screen 6, and thus ensure the filtering performance of the filter screen 6 and the fluidity of the flue gas. The swivel 13 can rotate on the second ring sleeve 11, thereby driving the rotary scraper 7 to rotate. The plate wall nozzle 8 follows the movement of the rotary scraper 7, and can effectively remove impurities on the filter screen 6.

[0033] The cross-section of the swivel 13 is "L"-shaped. A plurality of water guide plates 16 are arranged on the surface of the swivel 13 in a centrally symmetrical distribution. A water inlet cavity 17 is arranged in the water guide plate 16. A water inlet hole 18 is arranged on the side surface of the water guide plate 16 corresponding to the opposite rotation direction of the swivel 13. The outer end of the third water guide pipe 15 is connected to the water inlet cavity 17, and the side surface and the inner side surface of the water guide plate 16 facing the filter 6 are respectively connected to the two side surfaces of the swivel 13, and the water outlet end of the second water guide pipe 14 is axially located in the area of ​​the water guide plate 16.

[0034] The water entering the water diversion chamber 12 enters the water inlet chamber 17 from the water inlet hole 18 under pressure, and finally enters the third water diversion pipe 15. In this embodiment, when the water flows into the water diversion chamber 12 from the second water inlet pipe, it has an impact on the water diversion plate 16, and then uses the water pressure to impact the water diversion plate 16 to drive the rotating ring 13 to rotate.

[0035] In a relatively specific embodiment, the second water diversion pipe 14 includes a second straight pipe 14.1 and a second arc-shaped pipe 14.2, the bottom end of the second arc-shaped pipe 14.2 tangentially penetrates the second ring sleeve 11 and communicates with the water diversion chamber 12, the water outlet end of the second straight pipe 14.1 is connected to the second straight pipe 14.1, and the water inlet end of the second straight pipe 14.1 is connected to the water outlet end of the booster water pump 4.

[0036] In this embodiment, in the axial direction of the water diversion chamber 12, the length of the water diversion plate 16 is less than the length of the water diversion chamber 12, and the end of the outer side of the water diversion plate 16 close to the air duct 1 is an inwardly inclined slope, and a gap is formed between the outer inner wall surface of the water diversion chamber 12, so that the area between two adjacent water diversion plates 16 is connected through the gap, and then, all positions in the water diversion chamber 12 are subjected to a relatively balanced pressure, ensuring that the plate wall nozzles 8 on each scraper can spray water mist more evenly. The water flow sprayed from the bottom end of the second arc tube 14.2 can more effectively impact the area of ​​the water diversion plate 16 located on the front side of the slope in the axial direction of the air duct 1, so as to better drive the rotating ring 13 to rotate.

[0037] Among them, the connection between the second arc tube 14.2 and the second ring sleeve 11 is located on the arc surface where the second quadrant of the second ring sleeve 11 is located. Such an arrangement allows water to increase the weight of the swivel 13 on the same side of the second arc tube 14.2 after entering from the second arc tube 14.2, so that the swivel 13 itself becomes unbalanced, which is conducive to driving the swivel 13 to rotate.

[0038] A notch 19 is provided on one side of the rotary scraper 7 facing the filter 6, the inner wall of the notch 19 away from the filter 6 is parallel to the vertical plane, the bottom inner wall of the notch 19 forms an obtuse angle with the vertical plane, and the plate wall nozzle 8 is provided at the connection of the inner wall surfaces on both sides of the notch 19. By providing the notch 19, the impurities scraped off by the rotary scraper 7 on the filter 6 will be accumulated in the notch 19, and a certain amount of water can be accumulated in the notch 19, and then, when the notch 19 is tilted downward or the outer end is tilted downward, the accumulated impurities can be more smoothly separated from the rotary scraper 7 and the filter 6.

[0039] The filter screen 6 includes a ring body portion 6.1 and a mesh body portion 6.2, and the ring body portion 6.1 is fixedly arranged on the inner surface of the second ring sleeve 11, and the inner diameters of the ring body portion 6.1, the rotating ring 13, the second ring sleeve 11 and the air duct 1 are the same. In this arrangement, after the impurities scraped from the filter screen 6 fall on the inner bottom wall of the second ring sleeve 11, they can continue to move forward under the wind force of the axial flow fan 2, preventing the impurities from flowing back into the air duct 1.

[0040] An extension pipe 20 is connected to one end of the second ring sleeve 11 away from the air duct 1, a drain pipe 21 is connected to the bottom of the extension pipe 20, and a row of grid plates 22 are arranged at one end of the extension ring away from the second ring sleeve 11. The impurities removed from the filter screen 6 will enter the extension pipe 20 under the wind force of the axial flow fan 2, and finally gather in the drain pipe 21 to be effectively discharged.

[0041] The technical scope of the present invention is not limited to the contents of the above description. Those skilled in the art can make various deformations and modifications to the above implementation without departing from the technical idea of ​​the present invention, and these deformations and modifications should all fall within the scope of the present invention.

Claims

1. A high-efficiency early warning smoke exhaust system for public areas of subway stations, characterized in that: The invention comprises an air duct (1), an axial flow fan (2), a water tank (3), a booster water pump (4), a pipe wall nozzle (5), a filter screen (6), a rotary scraper (7) and a plate wall nozzle (8), wherein the air duct (1) is connected to the tail end of an exhaust pipe (1) in a public area of ​​a subway station for exhausting smoke, the axial flow fan (2) is installed inside the air duct (1), the water tank (3) and the booster water pump (4) are both arranged on the top of the air duct (1), and the pipe wall nozzle (5 ... A plurality of nozzles (5) are arranged equidistantly along the circumferential direction on the inner wall surface of the air inlet end of the air duct (1); the filter screen (6) is arranged in the air outlet end of the air duct (1); the rotary scraper (7) is rotatably arranged on a side of the filter screen (6) facing the air inlet end; the axial flow fan (2) is located between the pipe wall nozzle (5) and the rotary scraper (7) in the length direction of the air duct (1); and the plate wall nozzle (8) is arranged on the rotary scraper (7) for flushing the filter screen (6).

2. A high-efficiency early warning smoke exhaust system for public areas of subway stations as claimed in claim 1, characterized in that: The air inlet end of the air duct (1) is provided with a first ring sleeve (9), the pipe wall nozzle (5) is arranged through the first ring sleeve (9), and the outer end of the pipe wall nozzle (5) is connected to a first water supply pipe (10), and the first water supply pipe (10) is connected to the drainage end of the booster water pump (4).

3. A high-efficiency early warning smoke exhaust system for public areas of subway stations as claimed in claim 2, characterized in that: The first water diversion pipe (10) comprises a first straight pipe (10.1) and first arc-shaped pipes (10.2) connected to both sides of one end of the first straight pipe (10.1) close to the first ring sleeve (9), and the two first arc-shaped pipes (10.2) are both covered on the surface of the first ring sleeve (9).

4. The high-efficiency early warning smoke exhaust system for public areas of subway stations as claimed in claim 1, characterized in that: The air outlet end of the air duct (1) is provided with a second ring sleeve (11), a water diversion chamber (12) is provided in the second ring sleeve (11), a swivel (13) is rotatably installed in the water diversion chamber (12), the outer end of the rotary scraper (7) is fixedly installed on the inner surface of the swivel (13), the outer end of the second water diversion pipe (14) is connected to the water diversion chamber (12), the second ring sleeve (11) is connected to the second water diversion pipe (14), the water outlet end of the second water diversion pipe (14) is connected to the water diversion chamber (12), and the water inlet end of the second water diversion pipe (14) is connected to the water outlet end of the additional water pump, a third water diversion pipe (15) is installed in the rotary scraper (7), and the plate wall nozzle (8) is connected to the third water diversion pipe (15).

5. A high-efficiency early warning smoke exhaust system for public areas of subway stations as claimed in claim 4, characterized in that: The cross section of the rotating ring (13) is in an "L" shape. The surface of the rotating ring (13) is provided with a plurality of water guide plates (16) distributed in a centrally symmetrical manner. A water inlet cavity (17) is provided in the water guide plate (16). A water inlet hole (18) is provided on a side surface of the water guide plate (16) corresponding to the opposite side of the rotating direction of the rotating ring (13). The outer end of the third water guide pipe (15) is connected to the water inlet cavity (17), and the side surface and the inner side surface of the water guide plate (16) facing the filter screen (6) are respectively connected to the two side surfaces of the rotating ring (13). The water outlet end of the second water guide pipe (14) is axially located in the area of ​​the water guide plate (16).

6. A high-efficiency early warning smoke exhaust system for public areas of subway stations as claimed in claim 5, characterized in that: The second water diversion pipe (14) comprises a second straight pipe (14.1) and a second arc-shaped pipe (14.2); the bottom end of the second arc-shaped pipe (14.2) tangentially penetrates the second ring sleeve (11) and is in communication with the water diversion chamber (12); the water outlet end of the second straight pipe (14.1) is connected to the second straight pipe (14.1), and the water inlet end of the second straight pipe (14.1) is connected to the water outlet end of the booster water pump (4).

7. A high-efficiency early warning smoke exhaust system for public areas of subway stations as claimed in claim 4, characterized in that: A notch (19) is provided on one side of the rotary scraper (7) facing the filter screen (6); an inner wall of the notch (19) on a side away from the filter screen (6) is parallel to a vertical plane; an inner wall at the bottom of the notch (19) and the vertical plane form an obtuse angle; and the plate wall nozzle (8) is provided at the connection between the inner wall surfaces on both sides of the notch (19).

8. A high-efficiency early warning smoke exhaust system for public areas of subway stations as claimed in claim 4, characterized in that: The filter screen (6) comprises an annular portion (6.1) and a mesh portion (6.2), and the annular portion (6.1) is fixedly arranged on the inner surface of the second ring sleeve (11), and the inner diameters of the annular portion (6.1), the rotating ring (13), the second ring sleeve (11) and the air duct (1) are the same.

9. A high-efficiency early warning smoke exhaust system for public areas of subway stations as claimed in claim 8, characterized in that: An end face of the second ring sleeve (11) away from the air duct (1) is connected to an extension pipe (20), a bottom of the extension pipe (20) is connected to a sewage pipe (21), and a row of grid plates (22) is provided at one end of the extension ring away from the second ring sleeve (11).

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