CN113847081A - Tunnel dust removal equipment and dust removal method thereof - Google Patents
Tunnel dust removal equipment and dust removal method thereof Download PDFInfo
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- 239000000428 dust Substances 0.000 title claims abstract description 98
- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000004140 cleaning Methods 0.000 claims abstract description 59
- 238000001514 detection method Methods 0.000 claims abstract description 13
- 230000005540 biological transmission Effects 0.000 claims 1
- 238000010410 dusting Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 19
- 239000012530 fluid Substances 0.000 description 25
- 230000006835 compression Effects 0.000 description 14
- 238000007906 compression Methods 0.000 description 14
- 238000004364 calculation method Methods 0.000 description 10
- 238000004088 simulation Methods 0.000 description 10
- 238000005516 engineering process Methods 0.000 description 8
- 230000008569 process Effects 0.000 description 7
- 238000011160 research Methods 0.000 description 7
- 238000004134 energy conservation Methods 0.000 description 6
- 239000002817 coal dust Substances 0.000 description 5
- 238000004458 analytical method Methods 0.000 description 4
- 230000008859 change Effects 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 230000002265 prevention Effects 0.000 description 3
- 238000009423 ventilation Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 238000003912 environmental pollution Methods 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000004887 air purification Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000008447 perception Effects 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- BPJYAXCTOHRFDQ-UHFFFAOYSA-L tetracopper;2,4,6-trioxido-1,3,5,2,4,6-trioxatriarsinane;diacetate Chemical compound [Cu+2].[Cu+2].[Cu+2].[Cu+2].CC([O-])=O.CC([O-])=O.[O-][As]1O[As]([O-])O[As]([O-])O1.[O-][As]1O[As]([O-])O[As]([O-])O1 BPJYAXCTOHRFDQ-UHFFFAOYSA-L 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F5/00—Means or methods for preventing, binding, depositing, or removing dust; Preventing explosions or fires
- E21F5/20—Drawing-off or depositing dust
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F1/00—Ventilation of mines or tunnels; Distribution of ventilating currents
- E21F1/003—Ventilation of traffic tunnels
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F1/00—Ventilation of mines or tunnels; Distribution of ventilating currents
- E21F1/08—Ventilation arrangements in connection with air ducts, e.g. arrangements for mounting ventilators
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F5/00—Means or methods for preventing, binding, depositing, or removing dust; Preventing explosions or fires
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Abstract
The invention relates to a tunnel dust removing device and a dust removing method thereof, wherein the tunnel dust removing device comprises: the cleaning device comprises a cleaning device and a detection device, wherein a cleaning piece of the cleaning device is arranged outside the tunnel; the collecting piece is arranged above the tunnel outlet, and the cleaning piece can purify turbid gas; one end of the output piece extends to the inside of the tunnel and is positioned at the bottom of the tunnel, and one end of the output piece positioned in the tunnel is provided with an air outlet; the detection device can detect the passing of a train and control the opening and closing of the cleaning part and the power part, so that the output part can convey clean gas to the inside of the tunnel to push turbid gas in the tunnel to flow to the tunnel outlet, and the collection part collects the turbid gas to form a cycle; the collecting part collects the turbid gas, the cleaning part can purify the turbid gas, the clean gas is sent into the tunnel through the output part, and the turbid gas is pushed into the collecting part by the clean gas, so that circulation is formed, the structure is simple, and the dust removal effect is good; the device is arranged outside the tunnel and does not occupy the passing track of the train.
Description
Technical Field
The invention relates to the field of air purification equipment, in particular to tunnel dust removal equipment and a dust removal method thereof.
Background
The dust emission of the tunnel is a major problem which troubles the normal use of the tunnel and influences the safe running of trains, wherein the coal dust treatment in the railway coal transportation process is a technical problem which troubles the railway department for a long time. In an actual tunnel, vehicles which are put into operation in some railway lines have high traffic density, large carrying capacity, complex line environment and more tunnels, and coal dust is caused to fall under the action of 'piston wind' when a coal train frequently passes through the tunnels; the harm of a large amount of coal dust that the railway tunnel produced mainly includes serious environmental pollution, seriously threatens railway staff occupational health, accelerates train mechanical wear, shortens equipment life and can reduce operational environment's visibility, influences the interior maintenance operation of tunnel and railway and normally travel.
Therefore, the problems of dust prevention and dust removal of the tunnel are very outstanding, no mature dust prevention and dust removal technology for the heavy haul railway tunnel exists, and particularly, the research on the dust removal technology for the heavy haul railway tunnel has great application market and environmental protection benefits under the environment protection concept of 'green mountain green water is the silver mountain of the Jinshan mountain'. In the prior art, dust removal technologies in tunnels at home and abroad mainly comprise four types: spraying technology, electrostatic dust collection, dust collection equipment, ventilation technology and the like. In the spraying technology, most tunnels are in northern China mountain areas, so that water shortage is serious, and the problem of freezing prevention also exists in winter, so that the realization is difficult; regarding electrostatic dust removal, the high voltage which generates static electricity can affect the railway operation safety when meeting with a large amount of dust, and the tunnel space is limited and is not suitable for installation; regarding the ventilation technology, the ventilation and dust fall can blow a large amount of dust out of the tunnel to influence the surrounding environmental pollution, and is not suitable; therefore, the application provides a new tunnel dust removing device and a dust removing method thereof aiming at the dust collecting technology.
Disclosure of Invention
The invention provides tunnel dust removal equipment and a dust removal method thereof, wherein according to the flowing direction of turbid gas when a train passes through a tunnel, the turbid gas is collected by a collecting part at the exit of the tunnel, purified by a cleaning part, and sent into the tunnel by an output part, and pushed to enter the collecting part by the clean gas, so as to form circulation, and the tunnel dust removal equipment has a simple structure and a good dust removal effect; the device is arranged outside the tunnel, and does not occupy the passing track of the train, thereby solving the technical problem.
The technical scheme adopted by the invention for solving the technical problems is as follows: a tunnel dust removal apparatus, comprising: the cleaning device comprises a cleaning piece, a collecting piece, a power piece and an output piece; the cleaning piece is arranged outside the tunnel; the collecting piece is arranged above the tunnel outlet and connected with the cleaning piece; the collecting part can convey the turbid gas from the tunnel to the cleaning part, and the cleaning part can purify the turbid gas; one end of the output piece is connected with the cleaning piece through the power piece, the other end of the output piece extends into the tunnel and is positioned at the bottom of the tunnel, and one end of the output piece positioned in the tunnel is provided with an air outlet with an upward opening; the detection device can detect the passing of the train and control the cleaning piece and the power piece to be opened, so that the output piece can convey the clean gas of the cleaning piece to the inside of the tunnel to push the turbid gas in the tunnel to flow to the exit of the tunnel, and the collecting piece collects the turbid gas to form circulation.
At present, when fluid problems are analyzed and solved, a CFD fluid mechanics simulation analysis method has the same important role as a theoretical analysis method and a test research method. The aerodynamic numerical simulation calculation of the train belongs to the field of Computational Fluid Dynamics (CFD), namely, a flow model of a flow field of the train is solved by a numerical simulation calculation method, and relevant mechanical information of the flow field in the train and a tunnel is obtained. The method aims at a compressible basic control equation, a flow field numerical calculation method and a turbulence model when a train passes through a tunnel.
The three-dimensional compressible viscous flow adopted when the train passes through the tunnel follows three basic laws in physics, namely a mass conservation law, a momentum conservation law and an energy conservation law. According to the mass conservation law, the increase of the fluid mass in the infinitesimal body in unit time is equal to the net mass flowing into the infinitesimal body in the same time interval, namely the sum of the change rate of the mass in the flow field along with the time and the fluid mass passing through the inlet and the outlet of the flow field in unit time is zero; the momentum conservation equation reflects the momentum conservation property in the fluid flow process, and the expression form in the fluid flow process is that the increment rate of the fluid momentum in the infinitesimal body is equal to the sum of various forces acting on the infinitesimal body; the energy conservation equation reflects the fundamental property of energy conservation in the fluid flow process, i.e., the rate of increase of thermodynamic energy in the infinitesimal body is equal to the net heat flux entering the infinitesimal body plus the work done by the volume and surface forces on the infinitesimal body.
In the problem of fluid flow of a train passing through a tunnel, relative motion exists between the train and the tunnel, numerical simulation is carried out, and a train-tunnel calculation model is established according to the actual situation that the train passes through a tunnel flow field, the train body outline dimension and the train running speed of the train and the section shape of the tunnel. Selecting commercial fluid analysis software (ANSYSCCFX) based on a finite volume method to perform numerical simulation, and correcting the calculation model by combining with actual wind speed and pressure tests of the inlet and the outlet of the tunnel. Then the gas flow characteristics of the train passing through the tunnel are studied, and a reasonable scheme is selected.
According to the above research method, the following results can be obtained: limited to the effect of the tunnel and the train walls, and due to the compressibility of the air, the air flow caused by the train passing through the tunnel is much more complicated than the air flow caused on the open line, i.e., when the train is outside the tunnel, which causes the air pressure in the tunnel to change. The pressure fluctuation characteristics are particularly complex for the head and tail of the train, the inlet and the outlet of the tunnel and the like with the geometry or the position with the abrupt structure. The shape of the head of the high-speed train has a better streamline shape, and the flow of the head and the tail of the train can be processed according to a potential flow theory, namely the air flow at the head and the tail of the train is respectively considered as a source and a sink.
(1) When a train drives into a tunnel, due to the compressibility of air and the fact that the train wall and the tunnel wall limit the space for lateral and upward air flow, air in front of the train is compressed and flows forwards along with the train, so that the air pressure in front of the train is suddenly increased, and compression waves are generated. The other part of air squeezed by the train flows to the rear of the train through the annular space, the length of the annular space where the train is located is gradually increased along with the further driving of the train into the tunnel, the air pressure in the tunnel space in front of the train is continuously increased, and the intensity of the compression wave is continuously increased until the train completely enters the tunnel. When the compression wave propagates to the tunnel exit, one part is reflected back in the form of an expansion wave, and the other part is transmitted out of the tunnel exit in the form of a micro-pressure wave.
(2) When the tail of the train enters the tunnel, because the negative pressure generated at the tail of the train is lower than the atmospheric pressure, the air which originally flows to the outside of the tunnel inlet through the annular space changes the flow direction and flows into the tunnel space behind the train, and the air in the tunnel also flows into the space.
(3) When the head of the train leaves the tunnel, the train moves from a narrow tunnel space to an open line space, namely the train is positioned outside the tunnel, the space where air around the train flows is suddenly increased, and the head of the train generates compression waves which are higher than the atmospheric pressure, so the compression waves can be diffused to the periphery.
In a preferred embodiment, the collecting element is a dust hood, which is provided with a collecting opening, which is arranged downwards. According to the research results, when the head of the train penetrates out of the outlet of the tunnel, the train moves to the open line space from the narrow tunnel space, the space where the air around the train flows is suddenly increased, and the head of the train generates compression waves which are higher than the atmospheric pressure, so the compression waves can be diffused to the periphery and flow out of the tunnel from the upper part of the outlet of the tunnel, and the dust collection cover is arranged outside the tunnel, so that the train cannot be influenced in operation, and the dust collection cover is simple and convenient to install; the air from the tunnel is mixed with the raise dust to form turbid gas, and the turbid gas has a tendency of rising upwards after flowing out of the outlet, so that a dust hood can be arranged above the tunnel outlet in front of the running of the train; the dust cage is equipped with the collection mouth again, should collect mouthful setting downwards, can play the effect of gathering together and collecting to turbid gas, above-mentioned simple structure follows fluid motion law and sets up scientifically, and dust collection effect is good.
In a preferred implementation mode, the dust collection cover is provided with a plurality of vent holes, and the vent holes are respectively connected with the cleaning piece through the gas conveying pipe. Because the train that moves in the railway is bulky, especially heavy load train, it can move a large amount of muddy gaseous movements, therefore the cleaning member need purify a large amount of muddy gas, correspondingly, in order to improve the efficiency that the cleaning member handled muddy gas, just set up a plurality of air vents at the dust cage, these air vents are connected with the cleaning member respectively, and carry muddy gas to the cleaning member, like this alright effectively improve the work efficiency of cleaning member, make more muddy gas purified in the unit interval, make the dust removal effect of this application better, work efficiency is higher.
In a preferred implementation, the lower edge of the dust hood is provided with an arc-shaped structure, and the arc-shaped structure is matched with the radian of the top of the tunnel. The structure enables the collecting port of the dust collecting cover to be matched with the tunnel outlet as much as possible, the lower edge of the dust collecting cover, namely the position of the collecting port is matched with the radian of the top of the tunnel, when turbid gas from the interior of the tunnel flows out of the tunnel outlet, the collecting port can collect more turbid gas, the loss of the turbid gas is reduced as much as possible, the dust collecting effect is improved, and the dust removing effect of the dust collecting device is improved; moreover, the structure can also avoid the passing of the train, so that the train passing is facilitated.
In a preferred implementation mode, the output piece is provided with a cylindrical structure, one end of the output piece is open, and the other end of the output piece is closed; the open end of the output piece is connected with the power piece, and the closed end of the output piece is provided with an air outlet. Above-mentioned output one end links to each other through the dust remover through power spare and cleaning piece, it is preferred, above-mentioned cleaning piece can set up to the dust remover, power spare can set up to centrifugal fan, the clean gas that has handled through the dust remover sends into 15 meters in to the tunnel by output spare behind centrifugal fan, output spare can set up to the inboard port confined pipeline in tunnel, and seted up the gas outlet at the tip and upwards blow, can guide the interior muddy gas of tunnel like this and move to tunnel outlet top, collect muddy gas for the dust cage and make preparation, carry into dust collection efficiency.
In a preferred implementation mode, the output pieces are provided in a plurality, the output pieces are arranged in parallel and are equal in length, and more preferably, the air outlet is provided in a plurality at intervals along the extension direction of the output pieces. The output piece is provided with a plurality of gas outlets, and the gas outlets are arranged at intervals along the extension direction of the output piece, so that the efficiency of conveying clean gas into the tunnel by the output piece can be improved, more clean gas in the tunnel in unit time can boost turbid gas, the dust removal efficiency is improved, and forward circulation is formed; preferably, the tip of every output spare is equipped with three gas outlet, can guarantee clean gaseous supply like this, can guarantee the inside pressure of output spare again, and above-mentioned structure makes the dust removal effect of this application better.
In a preferred implementation, the output member is disposed below ground, and the air outlet enables the interior of the output member to communicate with the outside. The output member can adopt a pre-buried mode in the below ground, the output member extending in the tunnel can avoid train operation, the train operation is not blocked, the operation time of the train is not occupied, the device is more convenient to use, the gas outlet is upwards arranged, and when the train penetrates out of the tunnel outlet, the flowing rule of the fluid at the tail part of the train is conformed to, the clean gas can better boost turbid gas, the turbid gas can reach the outlet of the tunnel, and the dust removal effect of the device can be improved.
In preferred implementation, detection device includes train detection sensor and system controller, when this device of practical application, arrange train detection sensor perception train at tunnel entry certain distance, when the train is about to pass through above-mentioned entry, system controller automatic start cleaning piece begins work, the dust cage forms the negative pressure space, begin the muddy gas that drifts out in the suction tunnel, then make muddy gas pass through the pipeline and get into the dust remover and carry out the coal dust filtration, clean gas after the purification sends the tunnel formation wind pressure through output again, the muddy gas in the supplementary guide tunnel gets into the dust cage, form the circulation. After the train completely passes through the tunnel, the dust remover and the centrifugal fan work for a certain time delay, and then the equipment stops and maintains a standby state.
The invention adopts the structure and has the advantages that: according to the flowing direction of the turbid gas when the train passes through the tunnel, the turbid gas is collected by the collecting part at the exit of the tunnel, purified by the cleaning part, sent into the tunnel by the output part and pushed into the collecting part by the clean gas to form circulation, and the device has a simple structure and a good dust removal effect; the device is arranged outside the tunnel and does not occupy the passing track of the train.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic front view of the present invention.
Fig. 2 is a partial cross-sectional view of the present invention.
FIG. 3 is a flow chart of the working system of the present invention.
In the figure, the position of the upper end of the main shaft,
1. a cleaning member; 2. a collecting member; 201. a collection port; 202. a vent hole; 203. a gas delivery pipe; 3. a power member; 4. an output member; 401. an air outlet; 5. an outlet; 6. a train detection sensor; 7. a system controller.
Detailed Description
In order to more clearly explain the overall concept of the present invention, the following detailed description is given by way of example in conjunction with the accompanying drawings.
It should be noted that in the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and thus the scope of the present invention is not limited by the specific embodiments disclosed below.
As shown in fig. 1 to 3, a tunnel dust removing apparatus includes: the cleaning device comprises a cleaning piece 1, a collecting piece 2, a power piece 3 and an output piece 4; the cleaning piece 1 is arranged outside the tunnel; the collecting piece 2 is arranged above the tunnel outlet 5, and the collecting piece 2 is connected with the cleaning piece 1; the collecting member 2 can convey the turbid gas from the tunnel to the cleaning member 1, and the cleaning member 1 can purify the turbid gas; one end of the output piece 4 is connected with the cleaning piece 1 through the power piece 3, the other end of the output piece extends into the tunnel and is positioned at the bottom of the tunnel, and one end of the output piece 4 positioned in the tunnel is provided with an air outlet 401 with an upward opening; the detection device can detect the passing of a train and control the cleaning piece 1 and the power piece 3 to be opened, so that the output piece 4 can convey the clean gas from the cleaning piece 1 to the inside of the tunnel to push the turbid gas in the tunnel to flow to the tunnel outlet 5, and the collection piece 2 collects the turbid gas to form circulation.
At present, when fluid problems are analyzed and solved, a CFD fluid mechanics simulation analysis method has the same important role as a theoretical analysis method and a test research method. The aerodynamic numerical simulation calculation of the train belongs to the field of Computational Fluid Dynamics (CFD), namely, a flow model of a flow field of the train is solved by a numerical simulation calculation method, and relevant mechanical information of the flow field in the train and a tunnel is obtained. The method aims at a compressible basic control equation, a flow field numerical calculation method and a turbulence model when a train passes through a tunnel.
The three-dimensional compressible viscous flow adopted when the train passes through the tunnel follows three basic laws in physics, namely a mass conservation law, a momentum conservation law and an energy conservation law. According to the mass conservation law, the increase of the fluid mass in the infinitesimal body in unit time is equal to the net mass flowing into the infinitesimal body in the same time interval, namely the sum of the change rate of the mass in the flow field along with the time and the fluid mass passing through the inlet and the outlet of the flow field in unit time is zero; the momentum conservation equation reflects the momentum conservation property in the fluid flow process, and the expression form in the fluid flow process is that the increment rate of the fluid momentum in the infinitesimal body is equal to the sum of various forces acting on the infinitesimal body; the energy conservation equation reflects the fundamental property of energy conservation in the fluid flow process, i.e., the rate of increase of thermodynamic energy in the infinitesimal body is equal to the net heat flux entering the infinitesimal body plus the work done by the volume and surface forces on the infinitesimal body.
In the problem of fluid flow of a train passing through a tunnel, relative motion exists between the train and the tunnel, numerical simulation is carried out, and a train-tunnel calculation model is established according to the actual situation that the train passes through a tunnel flow field, the train body outline dimension and the train running speed of the train and the section shape of the tunnel. Selecting commercial fluid analysis software (ANSYSCCFX) based on a finite volume method to perform numerical simulation, and correcting the calculation model by combining with actual wind speed and pressure tests of the inlet and the outlet of the tunnel. Then the gas flow characteristics of the train passing through the tunnel are studied, and a reasonable scheme is selected.
According to the above research method, the following results can be obtained: limited to the effect of the tunnel and the train walls, and due to the compressibility of the air, the air flow caused by the train passing through the tunnel is much more complicated than the air flow caused on the open line, i.e., when the train is outside the tunnel, which causes the air pressure in the tunnel to change. The pressure fluctuation characteristics are particularly complex for the head and tail of the train, the inlet and the outlet of the tunnel and the like with the geometry or the position with the abrupt structure. The shape of the head of the high-speed train has a better streamline shape, and the flow of the head and the tail of the train can be processed according to a potential flow theory, namely the air flow at the head and the tail of the train is respectively considered as a source and a sink.
(1) When a train drives into a tunnel, due to the compressibility of air and the fact that the train wall and the tunnel wall limit the space for lateral and upward air flow, air in front of the train is compressed and flows forwards along with the train, so that the air pressure in front of the train is suddenly increased, and compression waves are generated. The other part of air squeezed by the train flows to the rear of the train through the annular space, the length of the annular space where the train is located is gradually increased along with the further driving of the train into the tunnel, the air pressure in the tunnel space in front of the train is continuously increased, and the intensity of the compression wave is continuously increased until the train completely enters the tunnel. When the compression wave propagates to the tunnel exit, one part is reflected back in the form of an expansion wave, and the other part is transmitted out of the tunnel exit in the form of a micro-pressure wave.
(2) When the tail of the train enters the tunnel, because the negative pressure generated at the tail of the train is lower than the atmospheric pressure, the air which originally flows to the outside of the tunnel inlet through the annular space changes the flow direction and flows into the tunnel space behind the train, and the air in the tunnel also flows into the space.
(3) When the head of the train leaves the tunnel, the train moves from a narrow tunnel space to an open line space, namely the train is positioned outside the tunnel, the space where air around the train flows is suddenly increased, and the head of the train generates compression waves which are higher than the atmospheric pressure, so the compression waves can be diffused to the periphery.
In a preferred implementation, the collecting member 2 is provided as a dust cage provided with a collecting opening 201, the collecting opening 201 being provided downwards. According to the research results, when the head of the train penetrates out of the exit of the tunnel, the train moves to the open line space from the narrow tunnel space, the space where the air around the train flows is suddenly increased, the head of the train generates compression waves which are higher than the atmospheric pressure, so the compression waves can be diffused to the periphery and flow out of the tunnel from the inside of the tunnel to the upper part of the exit of the tunnel, the dust collection cover is arranged outside the tunnel, the train operation cannot be influenced, and the dust collection cover is simple and convenient to install; the air from the tunnel is mixed with the raise dust to form turbid gas, and the turbid gas has a tendency of rising upwards after flowing out of the outlet, so that a dust hood can be arranged above the tunnel outlet in front of the running of the train; the dust cage is equipped with collection mouth 201 again, and this collection mouth 201 sets up downwards, can play the effect of gathering together and collecting to turbid gas, and above-mentioned simple structure complies with fluid motion law and sets up scientifically, and dust collection effect is good.
In a preferred embodiment, as shown in fig. 1, the dust cage is provided with a plurality of vent holes 202, and the vent holes 202 are respectively connected with the cleaning member 1 through air pipes 203. Because the train that moves in the railway is bulky, especially heavy load train, it can move a large amount of muddy gas motion, therefore cleaning member 1 need purify a large amount of muddy gas, correspondingly, in order to improve cleaning member 1 and handle the efficiency of muddy gas, just set up a plurality of air vents 202 at the dust cage, these air vents 202 are connected with cleaning member 1 respectively, and carry muddy gas to cleaning member 1, alright effectively improve cleaning member 1's work efficiency like this, make more muddy gas purify in the unit interval, make the dust removal effect of this application better, work efficiency is higher.
In a preferred embodiment, as shown in figure 1, the lower edge of the dust cage is provided with an arcuate configuration which conforms to the curvature of the tunnel roof. The structure enables the collecting port 201 of the dust collecting cover to be matched with the tunnel outlet as much as possible, the lower edge of the dust collecting cover, namely the position of the collecting port 201 is matched with the radian of the top of the tunnel, when turbid gas from the interior of the tunnel flows out of the tunnel outlet, the collecting port 201 can collect more turbid gas, the escape of the turbid gas is reduced as much as possible, the dust collecting effect is improved, and the dust removing effect of the dust collecting device is improved; moreover, the structure can also avoid the passing of the train, so that the train passing is facilitated.
In a preferred embodiment, as shown in fig. 2, the output member 4 is provided in a cylindrical structure, one end of the output member 4 is open, and the other end is closed; the open end of the output member 4 is connected to the power member 3 through a pipeline, and the closed end of the output member 4 is provided with an air outlet 401. Above-mentioned output 4 one end links to each other through the dust remover through power spare 3 and cleaning member 1, it is preferred, above-mentioned cleaning member 1 can set up to the dust remover, power spare 3 can set up to centrifugal fan, the clean gas that has handled through the dust remover sends into 15 meters in to the tunnel by output 4 behind the centrifugal fan, output 4 can set up to the inboard port confined pipeline in tunnel, and seted up gas outlet 401 at the tip and blown upwards, can guide the interior turbid gas of tunnel to the motion of tunnel export top like this, collect turbid gas for the dust cage and make preparation, it is dust collection efficiency to promote.
Preferably, the output member 4 is provided with a plurality of output members 4, the plurality of output members 4 are arranged in parallel and have the same length, and more preferably, the air outlet 401 is provided with a plurality of output members 4 at intervals along the extending direction. The output piece 4 is provided with a plurality of gas outlets 401, and the gas outlets 401 are arranged at intervals along the extending direction of the output piece 4, so that the efficiency of conveying clean gas into the tunnel by the output piece 4 can be improved, more clean gas in the tunnel in unit time can boost turbid gas, the dust removal efficiency is improved, and forward circulation is formed; preferably, the tip of every output 4 is equipped with three gas outlet 401, can guarantee clean gaseous supply like this, can guarantee the inside pressure of output 4 again, and above-mentioned structure makes the dust removal effect of this application better.
In a preferred embodiment, as shown in fig. 1 and 2, the output member 4 is disposed below the ground, and the air outlet 401 enables the interior of the output member 4 to communicate with the outside. Above-mentioned output 4 can take pre-buried in the below ground mode, extend like this and can dodge the train operation in the output 4 in the tunnel, make the train operation not obstructed, do not occupy the operating duration of train, make this device use more convenient, and gas outlet 401 upwards sets up, when also having complied with the train and worn out the tunnel export, the fluidic law of flow of train afterbody makes clean gaseous helping push away muddy gas better, makes its export that reachs the tunnel, thereby promotes the dust removal effect of this device.
In a preferred embodiment, as shown in fig. 3, the detecting device comprises a train detecting sensor 6 and a system controller 7, in practical application of the device, the train detecting sensor 6 is arranged at a certain distance at the entrance of the tunnel to sense the train, when the train is about to pass through the entrance, the system controller 7 automatically starts the cleaning member 1 to start working, the dust hood forms a negative pressure space, starts to pump the turbid gas floating in the tunnel, then the turbid gas enters the dust remover through a pipeline to be filtered by coal dust, the purified clean gas is sent to the tunnel through the output member 4 to form wind pressure, and the turbid gas in the tunnel is guided to enter the dust hood to form circulation in an auxiliary manner. After the train completely passes through the tunnel, the dust remover and the centrifugal fan work for a certain time delay, and then the equipment stops and maintains a standby state.
The technical solutions protected by the present invention are not limited to the above embodiments, and it should be noted that the combination of the technical solution of any one embodiment and the technical solution of one or more other embodiments is within the protection scope of the present invention. Although the invention has been described in detail above with reference to a general description and specific examples, it will be apparent to one skilled in the art that modifications or improvements may be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.
Claims (10)
1. A tunnel dust removal apparatus, comprising:
the cleaning device comprises a cleaning piece, a collecting piece, a power piece and an output piece; the cleaning piece is arranged outside the tunnel; the collecting piece is arranged above the tunnel outlet and is connected with the cleaning piece; the collecting member is capable of conveying the turbid gas from the tunnel to the cleaning member, and the cleaning member is capable of purifying the turbid gas; one end of the output piece is connected with the cleaning piece through the power piece, the other end of the output piece extends into the tunnel and is positioned at the bottom of the tunnel, and one end of the output piece positioned in the tunnel is provided with an air outlet with an upward opening;
the detection device can detect the passing of a train and control the cleaning piece and the power piece to open and close, the clean gas from the cleaning piece is conveyed to the interior of the tunnel by the output piece so as to push the turbid gas in the tunnel to flow to the tunnel outlet, and the turbid gas can be collected by the collecting piece.
2. A tunnel dust-collecting equipment according to claim 1, characterized in that the collecting member is provided as a dust hood provided with a collecting opening, which is arranged downwards.
3. The tunnel dust removing device as claimed in claim 2, wherein the dust collecting cover is provided with a plurality of vent holes, and the vent holes are respectively connected with the cleaning member through gas transmission pipes.
4. The tunnel dust removing device of claim 3, wherein the lower edge of the dust hood is provided with an arc-shaped structure, and the arc-shaped structure is matched with the arc of the top of the tunnel.
5. The tunnel dust removing device of claim 1, wherein the output member is provided in a cylindrical structure, one end of the output member is open, and the other end is closed; the open end of the output piece is connected with the power piece, and the closed end of the output piece is provided with an air outlet.
6. A tunnel dusting apparatus according to claim 5, characterized in that there are several of said output members, which are arranged parallel to each other and of equal length.
7. A tunnel dedusting apparatus as claimed in claim 6, wherein the air outlet is provided in a plurality at intervals along the extending direction of the output member.
8. The tunnel dedusting apparatus of claim 7 wherein the output member is disposed below ground and the air outlet enables an interior of the output member to communicate with an exterior.
9. The tunnel dedusting apparatus of claim 8, wherein the detection device includes a train detection sensor and a system controller.
10. The method for removing dust by using the tunnel dust removing device as claimed in claim 9, which comprises the following steps:
s1: the train detection sensor detects the passing of a train;
s2, the system controller receives the signal from the train detection sensor and controls the cleaning device to start to operate;
s3: when the working time of the cleaning device reaches the preset time, the system controller controls the cleaning device to stop acting and maintain the standby state.
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| CN113847081B (en) | 2024-06-07 |
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