Smoke forming equipment for blocking traffic road

Abstract

The invention belongs to the technical field of emergency management and control, and particularly discloses smoke forming equipment for traffic road blocking, which comprises a box body, one side of the box body is provided with a fluid inlet, the box body is internally provided with a smoke forming unit, and the smoke forming unit comprises an air inlet cover, a fan and a smoke guide cover which are connected in sequence; a smoke storage tank is arranged in the air inlet cover; the smoke guide cover comprises an upper guide cover and a lower guide cover, the upper guide cover and the lower guide cover are communicated with each other, and a guide grid surface is arranged on the smoke outlet and comprises a plurality of guide grids which are vertically arranged at intervals; flow guide columns are arranged in the upper flow guide cover and the lower flow guide cover, the two flow guide columns are connected with a flow guide grating surface, one end, far away from the fan, of each flow guide column is a closed surface, the other end of each flow guide column is a flow guide conical surface, and the closed surfaces of the two flow guide columns and the inner sides of the upper flow guide cover and the lower flow guide cover respectively form a smoke outlet ring belt. According to the invention, a smoke screen belt with uniform laminar flow can be formed.

Description

Technical Field

[0001] The present invention relates to the technical field of emergency management and control, and in particular to a smoke forming device for blocking traffic roads. Background Art

[0002] In view of the current situation where once an emergency occurs on tunnels, bridges and other roads, subsequent vehicles may continue to drive into the tunnel due to the inability to obtain accurate information in the first time, which may cause the severity of the accident to increase. In combination with the need for tunnel safety, it is necessary to set up a blocking system on the traffic road to prevent the rear vehicles from continuing to drive.

[0003] Once an emergency occurs in the tunnel, multiple blocking systems are set up at the entrance or before and after the entrance to implement flexible spatial area traffic flow blocking in the entire space in a combination of longitudinal and lateral forms, preventing vehicles from entering the tunnel from behind, and avoiding traffic congestion in the accident tunnel, which may cause difficulties in evacuating and rescuing people, and even cause secondary accidents.

[0004] The blocking system in the prior art uses a water curtain combined with light projection to form an image on a water curtain or a water screen, thereby playing the role of blocking vehicles in three-dimensional space. However, the imaging method of the water curtain or water screen has low recognition and needs to be implemented inside or at the entrance of the cave, which limits the usage scenarios. In addition, this method has low recognition and is not eye-catching enough. It can only be seen from a close distance, which can easily lead to rear-end collisions due to untimely braking of vehicles.

[0005] In order to solve the above problems, the invention patent with the publication number CN115565318A in the prior art discloses a highway traffic emergency blocking light smoke screen forming control method based on the Tyndall effect. The patent uses a smoke screen to play a blocking role. Compared with a water curtain or a water curtain, the smoke screen is more eye-catching and will not cause the road surface to be slippery. However, the smoke ejected by the smoke generator in the patent cannot be effectively sprayed in a uniform laminar flow to form a uniform smoke screen belt after leaving the equipment. It will form a cluster of smoke rings of varying thicknesses with the flow direction of the natural wind in the environment, and the position of the smoke ring is not fixed, and it may be blown away from the lane by the natural wind in the environment. The stability of the smoke belt in the prior art is insufficient, which is not conducive to the long-distance observation of the driver and passengers; in addition, the smoke ejected by the existing smoke generator is white smoke, and under the sunlight, the smoke is not easy to be observed by the driver and passengers 100 meters away. Summary of the invention

[0006] The invention provides a smoke forming device for blocking traffic roads, aiming at forming a smoke screen belt with uniform laminar flow.

[0007] The present invention is implemented by the following technical scheme: a smoke forming device for blocking a traffic road, comprising a box body, one side of the box body is provided with a fluid inlet, the other side of the box body is provided with a fluid outlet, a smoke forming unit is installed in the box body, and the smoke forming unit comprises an air inlet hood, a fan and a smoke guide hood connected in sequence;

[0008] The air inlet cover is installed at the fluid inlet, and a smoke storage tank is arranged in the air inlet cover, and the chemical substances in the smoke storage tank can generate smoke after being ignited;

[0009] The smoke deflector comprises an upper deflector and a lower deflector, and a deflector grille surface is provided on one side of the upper deflector and the lower deflector away from the fan, and the deflector grille surface comprises a plurality of deflector grilles arranged at intervals vertically, and the deflector grille surface is installed on the fluid outlet;

[0010] The upper air guide cover and the lower air guide cover are both provided with guide columns, the two guide columns are connected to the guide grille surface, the end of the guide column away from the fan is a closed surface, and the other end of the guide column is a guide conical surface, and the closed surfaces of the two guide columns form a smoke outlet ring with the inner sides of the upper air guide cover and the lower air guide cover respectively.

[0011] Compared with the prior art, this solution has the following advantages and beneficial effects:

[0012] In this scheme, the outside wind enters the air inlet hood from the fluid inlet under the negative pressure of the fan. The smoke generated by the smoke storage tank is rotated at high speed by the fan blade of the fan, and the smoke is evenly dispersed. Then, the smoke passes through the flow space composed of the guide cone surface and the guide grille surface of the two guide columns in the smoke guide hood. Since the guide grille is vertically arranged, the smoke fluid is guided from a turbulent state to a laminar state and ejected, forming a uniformly distributed smoke jet flow, thereby playing a flexible blocking role, reminding the driver and passengers of the danger ahead, and making emergency plans such as parking.

[0013] The smoke wall formed in this scheme is continuous, and under the action of the guide column and the vertically arranged guide grille, the smoke in the turbulent state can be converted into a laminar state and sprayed out to form a uniformly distributed and regular smoke screen belt. The position of the laminar smoke at the injection point is fixed, and the formed smoke screen belt is more stable, which is conducive to long-distance observation by drivers and passengers.

[0014] In addition, the closed surfaces of the two guide columns in the middle form a smoke outlet ring with the inner sides of the upper guide cover and the lower guide cover respectively, which can ensure sufficient wind speed. If there is no closed surface in the middle, and the end faces of the upper guide cover and the lower guide cover are completely unobstructed smoke flow areas, the pressure loss is small at this time, but the air outlet area is large. Since the pressure and area are inversely proportional, the larger the air outlet area, the closer the smoke blown out is, and the poorer the blocking effect is.

[0015] The setting of the smoke outlet ring in the present application can ensure that the wind has a sufficient wind speed when the air is discharged, the smoke outlet distance is large, and laminar flow can be formed.

[0016] Furthermore, the upper air guide cover and the lower air guide cover have a surface away from the fan as mutually connected smoke outlets, the air guide grille surface is installed on the smoke outlet, and a horizontally arranged turbulence demarcation plate is connected to the middle position of the air guide grille surface.

[0017] Beneficial effects: In the present solution, the upper air guide cover and the lower air guide cover are arranged overlapping each other, and one side of the upper air guide cover and the lower air guide cover are interconnected to avoid discontinuity in the middle of the ejected smoke wall and the formation of a broken belt; in addition, in the present solution, the upper air guide cover and the lower air guide cover have a side away from the fan as an interconnected smoke outlet structure, so that the smoke outlets of the upper air guide cover and the lower air guide cover form a connected whole, and a turbulent demarcation plate is added in the middle position of the guide grille surface, so that the smoke can be connected from the middle of the smoke outlet of the smoke guide cover, and mutual interference between the upper and lower smoke parts can be avoided.

[0018] Under the blocking effect of the turbulent decomposition plate, the smoke can be forced to move forward, avoiding the formation of vortex and turbulence in the middle part of the smoke outlet, so that the smoke can only be ejected in laminar flow to form a regular and uniform smoke curtain wall.

[0019] In addition, since the entire smoke deflector in the present solution forms a hollow structure, the provision of the turbulent boundary plate can also enhance the strength of the entire smoke deflector.

[0020] Furthermore, the upper and lower parts of the guide grille surface are respectively connected with an upper boundary plate and a lower boundary plate which are arranged horizontally.

[0021] Beneficial effect: The arrangement of the upper dividing plate and the lower dividing plate in this scheme can further avoid turbulence and other phenomena in the smoke at the smoke outlet, so that the smoke coming out of the upper guide cover and the lower guide cover can be ejected in a laminar state, further improving the laminar quality of the smoke curtain wall.

[0022] Furthermore, the smoke deflector is in an 8-shape, and the upper deflector and the lower deflector are connected as one body through an arc transition.

[0023] Beneficial effect: Such a setting can reduce wind resistance, avoid turbulence between the upper air guide cover and the lower air guide cover, and make the air outlet of the smoke outlet smoother.

[0024] Furthermore, two of the fans and two of the air inlet covers are provided, and the two fans and the two air inlet covers are respectively arranged opposite to the upper air guide cover and the lower air guide cover.

[0025] Beneficial effect: In this solution, the two fans and the two air inlet covers are respectively opposite to the upper guide cover and the lower guide cover, so that the smoke curtain wall laminar flow is more uniform and the smoke curtain wall effect is better.

[0026] Furthermore, the outer side of the box body is connected with a rainproof deflector cover, and the fluid inlet is located inside the rainproof deflector cover.

[0027] Beneficial effects: The rainproof deflector in this solution can guide the wind entering the fluid inlet, and can also block rain to prevent rainwater from entering.

[0028] Furthermore, a fluid inlet protection net is installed in the fluid inlet, and the smoke storage tank is connected to the fluid inlet protection net.

[0029] Beneficial effects: The setting of the fluid inlet protection net can prevent external debris from entering, while ensuring that external wind can enter smoothly, and on the other hand, it is convenient for installing the smoke storage tank.

[0030] Furthermore, the smoke storage tank includes a tank body and a smoke bomb, the smoke bomb is located in the tank body, the smoke bomb stores chemical substances that can burn to produce colored smoke, the smoke bomb has a lead, the box body is installed with an electronic ignition component, and the starting wire in the electronic ignition component is connected to the lead.

[0031] Beneficial effects: In this scheme, the electronic ignition component is used to ignite the fuse on the smoke bomb, and the chemical substances in the smoke bomb burn to produce a chemical reaction to generate colored smoke. The colored smoke generated in this scheme is more recognizable and more eye-catching. In addition, in this scheme, the electronic ignition and chemical smoke generation are faster.

[0032] Furthermore, the smoke storage tanks are provided in plurality, and the plurality of smoke storage tanks are evenly distributed along the circumference of the air inlet cover.

[0033] Beneficial effect: The arrangement of multiple smoke storage tanks in the present solution can ignite a certain number of smoke storage tanks according to actual needs, and determine whether it is necessary to ignite more smoke storage tanks based on whether the interception is successful on site.

[0034] Furthermore, the smoke storage tank is close to the inner section of the air inlet hood.

[0035] Beneficial effect: Compared with placing multiple smoke storage tanks in the middle of the air inlet hood, this arrangement can reduce wind resistance and pressure loss, avoid excessive wind speed reduction, and make the smoke more uniform. The smoke storage tank is arranged on the inner section of the air inlet hood so that the smoke is discharged at the outermost side. During the rotation of the fan blade of the fan, the wind force will rotate toward the center, thereby ensuring that the smoke can be uniform on the entire flow surface, so that the smoke is discharged more evenly and the effect is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The drawings described herein are used to provide a further understanding of the embodiments of the present invention, constitute a part of this application, and do not constitute a limitation of the embodiments of the present invention. In the drawings:

[0037] Figure 1 A three-dimensional diagram of a smoke forming device for blocking a traffic road according to an embodiment of the present invention from one viewing angle;

[0038] Figure 2 A three-dimensional diagram of another perspective of an embodiment of a smoke forming device for blocking a traffic road according to the present invention;

[0039] Figure 3 A three-dimensional diagram of a smoke forming unit from one perspective in an embodiment of a smoke forming device for blocking a traffic road according to the present invention;

[0040] Figure 4 A three-dimensional diagram of another perspective of a smoke forming unit in an embodiment of a smoke forming device for blocking a traffic road according to the present invention;

[0041] Figure 5 A three-dimensional diagram of a smoke deflector in an embodiment of a smoke shaping device for blocking a traffic road according to the present invention;

[0042] Figure 6 It is a front view of an embodiment of a smoke forming device for blocking a traffic road according to the present invention;

[0043] Figure 7 for Figure 6 Sectional view at CC;

[0044] Figure 8 for Figure 6 Sectional view at AA in the middle;

[0045] Fig. 9 for Figure 8 Sectional view at the middle BB;

[0046] Fig.10 A rear view of an embodiment of a smoke forming device for blocking a traffic road according to the present invention;

[0047] Fig.11 It is a schematic diagram of the structure of a smoke bomb in an embodiment of a smoke forming device for blocking traffic roads according to the present invention;

[0048] Fig.12 The schematic diagram of fluid analysis of laminar smoke outflow using an 8-shaped smoke deflector;

[0049] Fig.13 It is a schematic diagram of fluid analysis of laminar smoke outflow when the middle of the smoke deflector is not connected;

[0050] Fig.14 Schematic diagram of Gaussian plume model coordinates.

[0051] Marks and corresponding parts names in the attached drawings:

[0052] Box 1, wind speed monitor 101, rainproof deflector 107, fluid inlet protection net 108;

[0053] The smoke forming unit 2, the air inlet cover 201, the fan 202, the fan fan surface 2021, and the fan rotor 2022; the smoke deflector 203, the deflector grille 2031, the deflector column 2032, the closed surface 20321, the deflector conical surface 20322, the turbulent flow dividing plate 2033, the upper deflector 2034, the lower deflector 2035, the upper dividing plate 2036, the lower dividing plate 2037, and the horizontal grid 2038; the smoke storage tank 204, the electronic ignition start line 2041, the outlet 2042, and the smoke bomb 2043. DETAILED DESCRIPTION

[0054] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with embodiments and drawings. The exemplary embodiments of the present invention and their description are only used to explain the present invention and are not intended to limit the present invention.

[0055] Example 1

[0056] like Figure 1-Figure 2 As shown, this embodiment 1 provides a smoke forming device for blocking traffic roads, including a box body 1, two fluid inlets are opened on one side of the box body 1, and a fluid outlet is opened on the other side of the box body, and the two fluid inlets are arranged vertically opposite to each other. In this embodiment, two rainproof deflector covers 107 are connected to the outside of the box body 1, and the two fluid inlets are respectively located in the rainproof deflector covers 107.

[0057] The two rainproof deflectors 107 are integrally formed with the box body 1 or connected by screws or welding. The rainproof deflector 107 is cylindrical in shape as a whole, and a rainproof deflector 107 structure that is wide at the top and narrow at the bottom is formed by oblique cutting on the cylindrical cover.

[0058] The box body 1 is equipped with a smoke forming unit 2, which is combined with Figure 3 As shown, the smoke forming unit 2 includes an air inlet cover 201, a fan 202 and a smoke guide cover 203 connected in sequence;

[0059] The air inlet cover 201 is installed at the fluid inlet, and a smoke storage tank 204 is arranged inside the air inlet cover 201. The chemical substances in the smoke storage tank 204 can generate smoke after being ignited; the fan 202 is an axial flow fan 202. The fan 202 has a fan blade 2021 and a fan rotor 2022 inside, and the fan blade 2021 faces the side of the smoke deflector cover 203;

[0060] Combination Figure 4 and Figure 5 As shown, a mounting hole matching the shape of the smoke deflector 203 is provided on the side of the box body 1 away from the fluid inlet. The smoke deflector 203 is located in the mounting hole and is fixed to the box body 1 by screws.

[0061] The smoke deflector 203 is in the shape of a figure 8. The smoke deflector 203 includes an upper deflector 2034 and a lower deflector 2035. The upper deflector 2034 and the lower deflector 2035 are hollow inside. The upper deflector 2034 and the lower deflector 2035 are connected to each other. Figure 3 As shown, in this embodiment, two fans 202 and two air inlet covers 201 are provided, and the two fans 202 and the two air inlet covers 201 are respectively arranged opposite to the upper air guide cover 2034 and the lower air guide cover 2035, and the two ends of the outer shell of the fan 202 are respectively connected to the air inlet cover 201 and the smoke guide cover 203 by screws, and the end of the air inlet cover 201 away from the fan 202 is connected to the box body 1 by screws.

[0062] In this embodiment, the upper air guide cover 2034 and the lower air guide cover 2035 are connected as one body through an arc transition, and a plurality of horizontal grilles distributed horizontally at intervals are connected to the middle position where the upper air guide cover 2034 and the lower air guide cover 2035 are connected to each other. The horizontal grilles can not only connect the upper air guide cover 2034 and the lower air guide cover 2035, but also make the spaces of the upper air guide cover 2034 and the lower air guide cover 2035 interconnected.

[0063] The upper air guide cover 2034 and the lower air guide cover 2035 are connected to each other on one side of the fan 202 in an 8-shaped smoke outlet. The smoke air guide cover 203 is connected to the fan 202 on one side of the fan 202 in an 8-shaped through hole. The smoke outlet is provided with an air guide grille 2031 surface. The air guide grille 2031 surface includes a plurality of air guide grilles 2031 arranged at vertical intervals. The air guide grille surface is installed on the fluid outlet. The shape of the fluid outlet matches the shape of the air guide grille surface.

[0064] Combination Figure 6 and Figure 7As shown, guide columns 2032 are provided in the upper guide cover 2034 and the lower guide cover 2035, and the two guide columns 2032 are connected to the guide grille 2031 surface. In this embodiment, the guide columns 2032 are welded and fixed to the guide grille 20312031 in the guide grille 2031 surface, and the two guide columns 2032 are coaxially arranged with the upper guide cover 2034 and the lower guide cover 2035 respectively. The end of the guide column 2032 away from the fan 202 is a closed surface 20321, and the other end of the guide column 2032 is a guide conical surface 20322. The closed surfaces 20321 of the two guide columns 2032 form a smoke outlet annulus with the inner sides of the upper guide cover 2034 and the lower guide cover 2035 respectively, and there is a distance between the vertex of the guide conical surface 20322 and the fan surface 2021 of the fan 202.

[0065] Combination Figure 4 As shown, in this embodiment, a horizontally arranged turbulence demarcation plate 2033 is connected to the middle position of the guide grille 2031 surface, and a horizontally arranged upper demarcation plate 2036 and a lower demarcation plate 2037 are respectively connected to the upper and lower parts of the guide grille 2031 surface, and the turbulence demarcation plate 2033, the upper demarcation plate 2036 and the lower demarcation plate 2037 are all laterally interspersed between a plurality of vertically arranged guide grilles 2031, and the widths of the turbulence demarcation plate 2033, the upper demarcation plate 2036 and the lower demarcation plate 2037 are all smaller than the width of the guide grille 2031. In this embodiment, one end of the turbulence demarcation plate 2033, the upper demarcation plate 2036 and the lower demarcation plate 2037 is flush with the outer side of the guide grille 2031 surface, and the widths of the turbulence demarcation plate 2033, the upper demarcation plate 2036 and the lower demarcation plate 2037 are about 1 / 4 of the width of the guide grille 2031. In this embodiment, the width of the guide grille 2031 is smaller than the width of the smoke guide cover 203 .

[0066] Specific:

[0067] Combination Figure 6 , Figure 7 , Figure 8 and Fig. 9 As shown, in this embodiment, the center distance L1 of the two guide columns 2032 is 600-700 mm, the angle r of the guide cone surface 20322 is 110-130°, the height h1 of the guide cone surface 20322 is 80-90 mm, the distance h2 between the vertex of the guide cone surface 20322 and the fan surface 2021 of the fan 202 is 35-45 mm, the width of the smoke outlet annular zone is 180-220 mm, the spacing j between two adjacent guide grilles 2031 is 15-20 mm, the width W1 of the guide grille 2031 is 115-130 mm, and the width W2 of the turbulent demarcation plate 2033, the upper demarcation plate 2036 and the lower demarcation plate 2037 are all 40-60 mm;

[0068] This embodiment is the best embodiment, the center distance L1 between the two guide columns 2032 is 650 mm, the angle r of the guide cone 20322 is 120°, the height h1 of the guide cone 20322 is 87 mm, the distance h2 between the vertex of the guide cone 20322 and the fan surface 2021 of the fan 202 is 38 mm, the width of the smoke outlet ring is 200 mm (that is, in this embodiment, the inner diameter of the smoke outlet ring is 300 mm, the outer diameter is 500 mm, and the closed surface diameter of the guide column is 300 mm), the spacing j between two adjacent guide grilles 2031 is 17 mm, the width W1 of the guide grille 2031 is 122 mm, and the width W2 of the turbulent boundary plate 2033, the upper boundary plate 2036 and the lower boundary plate 2037 are all 50 mm.

[0069] In this embodiment, if the guide grille 2031 is set too wide, the wind speed will drop very quickly and the pressure loss will be smaller. However, in this case, the wind speed is small, and laminar flow cannot be achieved or the laminar flow effect is poor. The width design of the guide grille 2031 in this application has a small pressure loss and a small impact on the wind speed, and can effectively form a laminar flow. In addition, the guide cone surface 20322 in this embodiment has a large guide angle and a short height, which can compress the overall thickness and make the entire box more compact. In this way, the gap between the guide cone surface 20322 and the smoke guide cover 203 is larger, so that the smoke is less blocked by the inner wall of the smoke guide cover 203 when passing through, thereby reducing the pressure loss of the smoke flowing through and making the discharged smoke laminar flow more uniform.

[0070] Combination Fig.10 As shown, the two fluid inlets are both equipped with fluid inlet protection nets 108, which are fixed to the box body 1 by screws, and the smoke storage tank 204 is connected to the fluid inlet protection net 108 by screws. In this embodiment, the flow inlet area composed of the rainproof deflector 107 and the fluid inlet protection net 108 is between 60% and 100% of the diameter area of ​​the fan face 2021, and the best in this embodiment is 85%.

[0071] In this embodiment, eight smoke storage tanks 204 are provided. The eight smoke storage tanks 204 are evenly distributed along the circumference of the air inlet cover 201 , and the smoke storage tanks 204 are close to the inner section of the air inlet cover 201 .

[0072] Combination Fig.11As shown, in this embodiment, the smoke storage tank 204 includes a tank body and a smoke bomb 2043, the smoke bomb 2043 is located in the tank body, the tank body is connected to the fluid inlet protection net 108 by screws, the smoke bomb 2043 stores a chemical substance that can burn to produce colored smoke, the chemical substance is formed by superimposing saturated fatty acids and organic pigments, the smoke bomb 2043 can use the fire drama bomb in the prior art, the smoke bomb 2043 has a lead, and the smoke bomb 2043 is provided with an outlet 2042 for dispersing smoke, an electronic ignition component is installed on the box 1, the starter wire in the electronic ignition component is connected to the lead, the electronic ignition starter wire 2041 is connected to the smoke lead by two core wires, and when one-button start is performed, the control circuit installed in the box 1 drives the constant current switch power supply to release a pulsed large current, and the lead of the smoke storage device is ignited by the large current and high resistance temperature rise principle; a chemical reaction occurs through combustion in the smoke bomb 2043 to produce colored smoke, and the electronic ignition technology belongs to a relatively mature technology in the prior art, which will not be repeated here.

[0073] Similar products on the market use a solution of high-pressure oil injection to form smoke. This type of solution uses aromatic hydrocarbon oils such as triglycerides. The initial injection startup cycle is long, generally 5-15S. At the same time, it is carried out under sunlight, and the smoke is not easy to be observed by drivers and passengers 100 meters away. This system uses saturated fatty acids and fats superimposed on organic pigments to burn chemical changes to form colored smoke, which can be clearly observed by drivers and passengers 100 meters away. The smoke emission time is short and can be controlled within 3S, effectively ensuring the effectiveness of the emergency startup plan.

[0074] The specific implementation process is as follows:

[0075] Combination Figure 7 As shown, the external fluid is introduced into the air inlet cover 201 from the rainproof deflector 107 under the action of the fan 202. After the smoke bomb 2043 is ignited by the electronic ignition, the smoke is rotated at high speed by the fan fan 2021 to evenly disperse the smoke. The smoke fluid is guided from a turbulent state to a laminar state through the flow space composed of the guide cone surface 20322, the turbulent boundary plate 2033, and the guide grille 2031 to be ejected, forming a uniformly distributed smoke jet flow. The flow path is shown by the arrow.

[0076] Combination Fig.12The figure shows a schematic diagram of fluid analysis of laminar smoke outflow using the 8-shaped smoke deflector 203 in this embodiment; the middle of the guide grille 2031 in this embodiment is connected, and the middle position is a non-enclosed structure, so that the smoke coming out of the smoke deflector 203 is continuous, and there is no discontinuity in the middle position to cause a broken smoke screen. In actual use, it can also be combined with a light strip to improve the blocking warning effect, and the light needs smoke as a medium to be visible. Therefore, the middle position of the guide grille 2031 in this application is connected, so that the smoke coming out is continuous. When combined with the light, a continuous and complete smoke strip will be formed to avoid discontinuity. Fig.13 As shown, it is a schematic diagram of fluid analysis of laminar smoke outlet when the smoke deflector 203 is not connected in the middle. It can be seen that when the smoke deflector 203 is not connected in the middle, the smoke outlet laminar flow is uneven, and the formed smoke curtain wall is discontinuous and broken in the middle.

[0077] In addition, in this embodiment, the smoke deflector in this scheme is in the shape of an 8, so that the upper deflector and the lower deflector are arranged overlappingly up and down, and the upper deflector and the lower deflector are connected to each other, so as to avoid the discontinuity in the middle of the ejected smoke wall and the formation of a broken belt. The smoke wall formed in this scheme is continuous, and under the action of the guide column and the vertically arranged guide grille, the smoke in the turbulent state can be converted into a laminar state and ejected to form a uniformly distributed and regular smoke screen belt. The position of the laminar smoke at the injection point is fixed, and the formed smoke screen belt is more stable, which is conducive to long-distance observation by the driver and passengers.

[0078] In addition, in this embodiment, the smoke deflector is in the shape of an 8, not a rectangle. The closed surfaces of the two guide columns in the middle form a smoke outlet ring with the inner sides of the upper deflector and the lower deflector, respectively, to ensure sufficient wind speed. If there is no closed surface in the middle, and the end surfaces of the upper deflector and the lower deflector are completely unobstructed smoke flow areas, the pressure loss is small, but the wind outlet area is large. Since the pressure and area are inversely proportional, the larger the wind outlet area, the closer the smoke blown out is, and the poorer the blocking effect is.

[0079] In the smoke deflector 203 with an 8-shaped structure, the closed surface 20321 on the guide column 2032 prevents the smoke from being directly emitted from the circumferential end surface of the entire smoke deflector 203. The smoke outlet ring belt cannot be too narrow. If it is too narrow, it will cause wind vortices in the smoke and it will be difficult to form laminar flow. The size of the smoke outlet ring belt given in this embodiment can ensure that there is sufficient wind speed when the air is discharged, forming a uniform laminar flow smoke curtain wall.

[0080] Example 2

[0081] The difference between this embodiment and embodiment 1 is that in this embodiment, a wind speed monitor is installed on the top of the box, and the ambient wind speed and direction are monitored by the wind speed monitor. In this embodiment, a standardized fluid state can be determined by a systematic algorithm model, and a uniformly distributed smoke curtain wall in a laminar state can be effectively formed under environments with different wind speeds and directions, thereby ensuring consistency and safety in implementation under different weather environments.

[0082] Smoke can be obtained by superimposing two standard models in different wind speed environments, one is the atmospheric diffusion model and the other is the Gaussian plume model;

[0083] like Fig.14 As shown in the figure, the smoke flow state that meets the following four points can be simplified using the Gaussian plume model:

[0084] 1. The average flow field of the wind is stable, the wind speed is uniform, and the wind direction is straight;

[0085] 2. The y and z axis directions conform to normal distribution;

[0086] 3. The mass of smoke is conserved during transportation and diffusion;

[0087] 4. The smoke output source is uniform and continuous;

[0088] The general form of the Gaussian plume model is as follows:

[0089]

[0090] Among them, the X-axis direction of the coordinate system is the downwind direction, c is the concentration of any point with coordinates (x, y, z) calculated by the model, Q is the gas emission rate, U is the wind speed, y is the y coordinate of the point, that is, the crosswind distance, and z is the z coordinate of the point.

[0091] σy and σz are the atmospheric diffusion parameters in the y and z directions, respectively. The emission rate Q and wind speed U are directly related to the concentration C. The rest of the formula specifies the shape of the plume. For a three-dimensional plume, what is observed from the front is the cumulative distribution in the z direction. This distribution is the integral of the three-dimensional plume in the y direction. The plume shape can be described by the following formula:

[0092]

[0093] What is observed from the top view is the cumulative distribution in the y direction. This distribution is the integral of the three-dimensional plume in the z direction. The plume shape can be described by the following formula:

[0094]

[0095] Multiplying these two plane formulas gives the solid formula.

[0096] σy and σz are the atmospheric diffusion parameters in the y and z directions, respectively. Both are functions of atmospheric stability and wind direction distance x, and can be calculated using the following formula:

[0097] σy=ax^b;

[0098] σz=cx^d+f;

[0099] b is the regression index of the lateral diffusion parameter;

[0100] d is the regression index of vertical diffusion parameter;

[0101] a is the regression coefficient of the lateral diffusion parameter;

[0102] c is the regression coefficient of the vertical diffusion parameter;

[0103] x is the horizontal distance of the air outlet;

[0104] The parameters of the above formula are obtained by fitting through multiple actual test values.

[0105] The wind speed U in the above parameters can be obtained by testing with a wind speed monitor. The emission rate Q is designed based on the rotation speed of the axial flow fan, the static pressure of the air outlet, and the functional structures of the 8-shaped air outlet (turbulent boundary plate, guide cone surface, guide grille 2031 surface, etc.). The emission rate Q contains a hidden parameter, and the smoke outlet requires the smoke flow state to be laminar. Different emission rates Q are experimentally measured according to different wind speeds U to obtain the best fitting data under the laminar state.

[0106] This embodiment effectively controls the smoke concentration of the jet stream by dynamically controlling the fan speed at different wind speeds; by establishing a data model correlating different smoke concentrations with different vehicle speeds, it effectively ensures driving safety in various environments and plays a role in flexible smoke blocking.

[0107] It should be noted that the above description of the disclosed embodiments enables professionals and technicians in the field to implement or use the present application. Various modifications to these embodiments will be apparent to professionals and technicians in the field, and the general principles defined herein can be implemented in other embodiments without departing from the scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but should conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A smoke forming device for blocking traffic roads, comprising a box, one side of the box is provided with a fluid inlet, and the other side of the box is provided with a fluid outlet, characterized in that: A smoke shaping unit is installed in the box, and the smoke shaping unit includes an air inlet cover, a fan and a smoke guide cover connected in sequence; The air inlet cover is installed at the fluid inlet, and a smoke storage tank is arranged in the air inlet cover, and the chemical substances in the smoke storage tank can generate smoke after being ignited; The smoke deflector comprises an upper deflector and a lower deflector, and a deflector grille surface is provided on one side of the upper deflector and the lower deflector away from the fan, and the deflector grille surface comprises a plurality of deflector grilles arranged at intervals vertically, and the deflector grille surface is installed on the fluid outlet; The upper air guide cover and the lower air guide cover are both provided with guide columns, the two guide columns are connected to the guide grille surface, the end of the guide column away from the fan is a closed surface, and the other end of the guide column is a guide conical surface, and the closed surfaces of the two guide columns form a smoke outlet ring with the inner sides of the upper air guide cover and the lower air guide cover respectively.

2. The smoke forming device for blocking traffic roads according to claim 1, characterized in that: The upper air guide cover and the lower air guide cover are connected to each other on one side away from the fan as smoke outlets. The air guide grille surface is installed on the smoke outlet. The middle position of the air guide grille surface is connected to a horizontally arranged turbulent demarcation plate.

3. The smoke forming device for blocking traffic roads according to claim 2, characterized in that: The upper part and the lower part of the guide grille surface are respectively connected with an upper boundary plate and a lower boundary plate which are arranged horizontally.

4. The smoke forming device for blocking traffic roads according to claim 1, characterized in that: The smoke deflector is in an 8-shape, and the upper deflector and the lower deflector are connected as one body through an arc transition.

5. The smoke forming device for blocking traffic roads according to claim 1, characterized in that: Two of the fans and two of the air inlet covers are provided, and the two fans and the two air inlet covers are arranged opposite to the upper air guide cover and the lower air guide cover respectively.

6. The smoke forming device for blocking traffic roads according to claim 1, characterized in that: The outer side of the box body is connected with a rainproof flow guide cover, and the fluid inlet is located inside the rainproof flow guide cover.

7. The smoke forming device for blocking traffic roads according to claim 1, characterized in that: A fluid inlet protection net is installed in the fluid inlet, and the smoke storage tank is connected to the fluid inlet protection net.

8. A smoke forming device for blocking traffic roads according to any one of claims 1 to 7, characterized in that: The smoke storage tank comprises a tank body and a smoke bomb, wherein the smoke bomb is located in the tank body, wherein chemical substances capable of burning to produce colored smoke are stored, wherein the smoke bomb is provided with a lead, wherein an electronic ignition assembly is installed on the box body, and a starter wire in the electronic ignition assembly is connected with the lead.

9. A smoke forming device for blocking traffic roads according to any one of claims 1 to 7, characterized in that: There are a plurality of smoke storage tanks, and the plurality of smoke storage tanks are evenly distributed along the circumference of the air inlet cover.

10. The smoke forming device for blocking traffic roads according to claim 9, characterized in that: The smoke storage tank is close to the inner section of the air inlet cover.

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