CN211006404U - Device is administered to tunnel face piston wind raise dust - Google Patents
Device is administered to tunnel face piston wind raise dust Download PDFInfo
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- CN211006404U CN211006404U CN201921147214.6U CN201921147214U CN211006404U CN 211006404 U CN211006404 U CN 211006404U CN 201921147214 U CN201921147214 U CN 201921147214U CN 211006404 U CN211006404 U CN 211006404U
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Abstract
The utility model provides a device is administered to tunnel face piston wind raise dust, is outwards extended by the tunnel face, sets up in the track both sides, mainly by concrete foundation, main tributary bearing structure, wind-inhibiting layer, dust blocking layer constitution. Whole equipment divides two-layer from top to bottom, and upper strata installation dust blocking layer, the layer of holding down wind of lower floor installation, the setting of dust blocking layer, holding down the wind layer is by close to sparse segmentation gradual change setting in the tunnel portal from near to far away. Utilize the accuse wind effect of the layer windbreak barrier strip that presses down, the dust fall effect of the ventilation unit of raise dust is prevented on the dust layer, establishes a buffer in tunnel mouth department for piston wind is broken at the buffer, subducts the effect and descends the air pressure, makes it tend to steadily gradually, and with the atmosphere fuse into one piece, reduces gaseous dust carrying capacity, prevents that inside dust from giving off the outside. The problem that the dust pollution of bulk materials is serious due to the generated piston wind when bulk transport trains such as coal, ore and the like pass through the tunnel can be effectively solved, the manufacturing cost and the operation cost are low, and a large amount of labor cost can be saved.
Description
Technical Field
The invention belongs to the field of environmental protection. The device is mainly used for pollution control of dust at the periphery of a freight railway tunnel portal, and particularly relates to a tunnel portal piston wind dust control device.
Background
When the train enters the tunnel, the air is compressed in front of the train, the pressure is increased rapidly, and compressed airflow is generated; when the tail of the train enters the tunnel, the air in the tunnel cannot be supplemented in time, the pressure is reduced rapidly, and an expansion (suction) airflow is formed; forming a piston wind. Compressed air flow, expanded air flow and turbulent flow in the tunnel act on the train repeatedly, so that the surface of coal in a carriage is blown up, dust in the tunnel is raised, the pressure intensity is reduced sharply when piston wind carrying a large amount of dust reaches a tunnel outlet, the gas volume is expanded rapidly and is diffused to the periphery rapidly in a fan shape, and the dust-containing air in the tunnel is taken out in a large amount by a suction effect generated when the train tail exits from the tunnel opening, so that large-scale dust pollution is caused.
The problem of dust pollution generated in the transportation of bulk goods such as coal and ore on railways has attracted high attention of environmental protection departments, particularly, when bulk goods such as coal and ore transport trains pass through a tunnel, fresh air is introduced into the tunnel, the generated piston wind speed is high, the dust of bulk materials is serious along with vortex, and the dust-containing air in the tunnel is taken out of the tunnel by a suction effect generated when the trains exit from the tunnel mouth, so that the dust pollution to the surrounding environment is caused by diffusion to the surrounding environment. The existing freight railway tunnel portal peripheral is not processed, and the problems cannot be solved.
Disclosure of Invention
The invention provides a device for treating dust pollution of a tunnel portal piston wind, which aims to effectively solve the problem that the dust pollution of bulk materials is serious due to the piston wind generated when bulk transport trains such as coal, ore and the like pass through a tunnel, and has the advantages of low manufacturing cost and operation cost and capability of saving a large amount of labor cost.
The invention is realized by adopting the following technical scheme:
a kind of tunnel portal piston wind dust pollution abatement device, this abatement device is set up in both sides of the orbit and extend to the tunnel from the tunnel portal, the said abatement device is made up of concrete foundation, main supporting structure, wind-inhibiting layer, dust-blocking layer; the main bearing structure sets up on the concrete foundation, installs on the main bearing structure and presses down wind layer, dust layer, and the dust layer is located main bearing structure's inboard, presses down the outside that the wind layer is located main bearing structure.
The outer dust-blocking layer is installed from dense to sparse sections from bottom to top outside the main supporting structure and along the driving direction, and the inner wind-inhibiting layer is installed from dense to sparse sections from bottom to top inside the main supporting structure and along the driving direction, so that the gradient attenuation of air pressure and air flow from large to small is realized, and the piston wind is changed into the piston wind consistent with the ambient wind in the buffer area.
The reinforced concrete foundation is designed according to the span, height and stress condition of the main supporting structure, C35 reinforced concrete is adopted as a material, the foundation bolt is embedded when concrete is poured, the foundation bolt and the foundation are integrated, and the main supporting structure is connected with the foundation bolt through the column foot plate.
The main supporting structure adopts a rod grid structure, and the grid structure adopts a square pyramid structure. The nodes of the net rack rod pieces adopt bolt ball nodes, the net rack rod pieces adopt high-frequency welded pipes or seamless pipes, and bolts adopt No. 45 steel. The space pipe truss structure can also be adopted, the sectional materials are adopted for splicing, and the space pipe truss structure nodes usually adopt directly welded intersecting nodes as connecting points.
The wind inhibiting layer comprises a wind barrier strip, a T-shaped piece, a front clamping plate at the end part of the barrier strip, a back clamping plate at the end part of the barrier strip and a C-shaped rubber block.
The wind barrier structure is characterized in that T-shaped parts are arranged on lower chord bolt ball nodes on the inner side of the grid structure, a row is arranged at intervals along the driving direction, the T-shaped parts are connected with the lower chord bolt ball nodes on the inner side of the grid structure through fasteners, front clamping plates at the end parts of the barrier strips are connected with the T-shaped parts through bolts, back clamping plates at the end parts of the barrier strips are connected with the front clamping plates at the end parts of the barrier strips through bolts, C-shaped rubber blocks and the wind barrier strips are clamped between the back clamping plates at the end parts of the barrier strips and the front clamping plates at the end parts of the barrier strips, the front clamping plates at the end parts of the barrier strips and the rear clamping plates at the end parts of.
The T-shaped part is formed by welding a longitudinal steel plate and a transverse steel plate in a T shape, the longitudinal steel plate and the transverse steel plate are welded in a superposed mode, and a mounting hole for mounting an inner side wind suppression layer is reserved in the longitudinal steel plate.
The wind barrier strip is C-shaped and made of polycarbonate material.
The front clamping plate at the end part of the barrier strip and the back clamping plate at the end part of the barrier strip are formed by forging and pressing.
The front clamping plate at the end part of the barrier strip is oval, the back clamping plate at the end part of the barrier strip is C-shaped, the front clamping plate at the end part of the barrier strip is reserved with a bolt connecting hole connected with a T-shaped piece, the front clamping plate at the end part of the barrier strip and the back clamping plate at the end part of the barrier strip are both provided with installation lugs, the installation lugs are reserved with installation holes, and the barrier strip can be connected through bolts.
The outer shape of the C-shaped rubber block is C-shaped, ethylene propylene diene monomer is used as a material, an insertion groove is formed in the middle of the C-shaped rubber block, the wind barrier strip is inserted into the insertion groove, and a circular rubber bulge is formed in the outer side of the C-shaped rubber block.
The outer dust blocking layer comprises a dust raising prevention ventilation unit, a T-shaped supporting plate, purlines and self-tapping screws.
The purlins comprise main purlins and secondary purlins; the main purline is transversely arranged on the T-shaped supporting plate, and the secondary purline is longitudinally arranged on the main purline. The primary and secondary purlins form a frame.
A row of T-shaped supporting plates are arranged on the net rack upper chord bolt ball at certain intervals along the traveling direction, the T-shaped supporting plates are connected with the bolt ball in the main supporting structure through clamping pieces and bolts, the purlines are connected with the T-shaped supporting plates through bolts, the dust-raising-preventing ventilation unit is installed on the secondary purlines through self-tapping screws, and the upper chord outer layer of the main supporting structure is completely closed.
The T-shaped supporting plate is formed by vertically welding a longitudinal steel plate and a transverse steel plate, the longitudinal steel plate and the transverse steel plate are welded in a superposed mode, and mounting holes for mounting a main purline and a secondary purline are reserved in the transverse steel plate.
The purline is made of high-frequency welding hot-dip galvanized square steel and is made of Q235B; the thickness of the purline is more than or equal to 2.5 mm. The hot dip galvanizing zinc plating amount of the purline is not less than 350g per square meter.
The dustproof ventilation unit adopts a dustproof ventilator disclosed in Chinese patent number Z L201820326434.4.
The working principle of the invention is as follows: establish a buffer in tunnel mouth department, utilize the accuse wind effect on lower floor's wind suppression layer, control train piston wind can not reduce sharply at tunnel exit atmospheric pressure, and make partly piston wind return, it can not spread rapidly to carry the dirt air, will carry dirt air control inside equipment, recycle the wind suppression effect of lower floor's wind suppression layer wind barrier strip each other, through the collision each other of air current, the friction, consume its kinetic energy, reduce its dust carrying capacity, it collects the effect to the air current to recycle the aviation baffle slant of the ventilation unit of the raise dust prevention on upper strata dust blocking layer, make the pressure grow in the semi-closed space that the ventilation unit of raise dust prevention encloses, thereby prevent inside dust from giving off the outside.
This buffer keeps off the setting of dirt layer, the layer of holding down wind is by close to dredging the gradual change setting far away at the tunnel portal for piston wind is broken at the buffer, subducts the effect and reduces the air current pressure, makes it tend to steadily gradually, and is integrated with the atmosphere, reduces gaseous dust carrying capacity, reaches the dust fall purpose.
The invention can effectively solve the problem of serious dust pollution of bulk materials caused by piston wind generated when bulk transport trains such as coal, ore and the like pass through the tunnel, has low manufacturing cost and operation cost, and can save a large amount of labor cost.
Drawings
FIG. 1 is an elevational view of the present invention;
FIG. 2 is a schematic exterior elevational view of the present invention;
FIG. 3 is a schematic interior elevational view of the present invention;
FIG. 4 is a partial installation schematic of the present invention;
in the figure, 1-foundation, 2-main supporting structure, 3-dust blocking layer, 4-wind inhibiting layer, 21-T-shaped supporting plate, 31-dust-proof ventilation unit, 32-galvanized self-tapping screw, 33-purlin, 41-T-shaped piece, 42-barrier strip end back splint, 43-C-shaped rubber block, 44-wind barrier strip, 45-barrier strip end front splint and 46-connecting bolt.
Detailed Description
Taking a two-line tunnel as an example, the tunnel is 12m wide and 8.6m high. The main supporting structure net rack span of the device for treating the wind-blown dust pollution at the tunnel portal is 16m, the height is 13m, and the device extends 60m from the tunnel portal to the outside of the tunnel.
Main bearing structure installs on concrete foundation, and main bearing structure installs on concrete foundation, and the dust blocking layer is installed to the main bearing structure outside, and the wind layer is pressed down in inboard installation.
The dust blocking layer is arranged outside the main supporting structure along the driving direction from bottom to top, the wind inhibiting layer is arranged inside the main supporting structure along the driving direction from bottom to top, and the outer dust blocking layer and the inner wind inhibiting layer are arranged along the driving direction in the main supporting structure in a gradual change mode from dense to sparse sections.
The method is divided into 6 sections, and the length of each section is 10 m. The front of the train advancing direction is taken as a first section, and the first section, the third section, the fourth section, the fifth section and the sixth section are respectively arranged in sequence.
The dust-raising-preventing ventilating units of the first dust-blocking layer are fully distributed without intervals and are arranged on the upper chord outer layer of the net rack; the centers of adjacent wind barrier bars in the wind inhibiting layer are arranged at a distance of 380mm and are uniformly distributed on the lower chord inner layer of the net rack.
The dust-raising-preventing ventilation units of the second section of dust blocking layer are full-distributed without intervals and are arranged on the upper chord outer layer of the net rack; the centers of adjacent wind barrier bars in the wind inhibiting layer are arranged at a distance of 430mm and are uniformly distributed on the lower chord inner layer of the net rack.
The third dust blocking layer is full of dust-raising-proof ventilation units without intervals and is arranged on the upper chord outer layer of the net rack; the centers of adjacent wind barrier bars in the wind inhibiting layer are arranged at a distance of 480mm and are uniformly distributed on the lower chord inner layer of the net rack.
The centers of the ventilation units adjacent to each other for preventing dust raising in the fourth dust blocking layer are installed at 2150mm intervals and are uniformly distributed on the outer layer of the upper chord of the net rack, and the centers of the adjacent wind barrier bars in the wind inhibiting layer are installed at 580mm intervals and are uniformly distributed on the inner layer of the lower chord of the net rack.
The centers of the adjacent dust-raising-prevention ventilation units in the fifth section of dust blocking layer are arranged at a distance of 2250mm and are uniformly distributed on the upper chord outer layer of the net rack; the centers of adjacent wind barrier bars in the wind inhibiting layer are arranged at a distance of 680mm and are uniformly distributed on the lower chord inner layer of the net rack.
The centers of the adjacent dust-proof ventilation units in the sixth dust-blocking layer are arranged at a distance of 2300mm and are uniformly distributed on the upper chord outer layer of the net rack; the centers of adjacent wind barrier bars in the wind inhibiting layer are installed at a distance of 780mm and are uniformly distributed on the lower chord inner layer of the net rack.
Two rows of reinforced concrete foundations are built on two sides of the track and serve as an installation base of the whole device, each foundation is 8M apart, C35 reinforced concrete is adopted as materials, an anchor bolt M20 is embedded when concrete is poured, the length of the anchor bolt M is 1200mm, the anchor bolt and the foundation are integrated, an upper grid structure is connected with the anchor bolt through a column foot plate, and the upper grid structure is connected with the foundation.
The main supporting structure adopts a square pyramid arched grid structure which is formed by rod pieces, the outer contour is a cylindrical surface, the nodes of the rod pieces of the grid adopt bolt-sphere nodes, and the thickness of the grid is set to be 1.5 m.
The net rack rod piece material comprises: high-frequency welded pipe or seamless pipe, bolt ball: steel No. 45; high strength bolt, pin: 20MnTiB steel or 40Cr steel; above M24, 40Cr steel is adopted; conical head and sealing plate: Q235B steel is selected; sleeve (nut): Q235B (less than or equal to M33) and No. 45 steel (> M33) steel forgings, and the corrosion prevention of the net rack structure adopts paint for corrosion prevention.
The main supporting structure can also be a truss structure consisting of rod pieces, and can also be a steel frame formed by bending section steel.
The wind inhibiting layer comprises a wind barrier strip, a T-shaped piece, a front clamping plate at the end part of the wind barrier strip, a back clamping plate at the end part of the wind barrier strip and a C-shaped rubber block.
The wind barrier device is characterized in that a row of T-shaped pieces are arranged at intervals of 4m along the driving direction of a net rack lower chord bolt ball, the T-shaped pieces are connected with a main support structure through clamping pieces and bolts, a front clamping plate at the end part of a barrier strip penetrates through a reserved bolt hole through a bolt to be connected with the T-shaped pieces, a back clamping plate at the end part of the barrier strip is connected with the front clamping plate at the end part of the barrier strip through a bolt, a C-shaped rubber block and a wind barrier strip are clamped between the two clamping plates, installation of the wind barrier strip is completed, the C-shaped rubber block plays a role in elastic filling, the front clamping plate and the back clamping plate at the end part of the barrier.
The T-shaped part is formed by welding two steel plates, the size of the transverse steel plate is 400 x 170 x 12mm, the size of the longitudinal steel plate is 400 x 150 x 12mm, the 400mm side of the longitudinal steel plate is coincidently welded with the 400mm center line of the transverse steel plate, and a mounting hole is reserved in the middle of the T-shaped part and used for mounting the wind barrier strip.
The wind barrier strip is made of a PC (polycarbonate) endurance plate with the thickness of 8mm, the raw material is a polycarbonate material, the outer shape of the wind barrier strip is designed into a circular arc shape, the wind barrier strip is shaped like a C shape, the standard length of the wind barrier strip is 2.5m, the width of the wind barrier strip is 212mm, and the height of the wind barrier strip is 86 mm.
Barrier strip tip front plate is the accessory with barrier strip tip back splint, the forging and pressing shaping, barrier strip tip front plate is oval, barrier strip tip back splint is C shape, the size is mutually supported, the long 340mm of shaping standard component, wide 65mm, it has the mounting hole to reserve on the oval web, can pass through bolted connection with T type spare, barrier strip tip front plate has the installation ear with barrier strip tip back splint, reserve the diameter 12mm mounting hole, accessible bolted connection presss from both sides C type block rubber and windbreak strip in the middle of two splint.
The C-shaped rubber block has an outer diameter of 240mm, an inner diameter of 184mm and a width of 60mm, a groove of 8mm is formed in the middle of the C-shaped rubber block, an 8mm wind barrier strip can be inserted into the groove, and rubber bulges with the radius of 6mm are formed on the surfaces of the inner diameter and the outer diameter.
The dust blocking layer comprises a dust-raising-preventing ventilation unit, a T-shaped supporting plate, purlines and galvanized self-tapping screws.
A row of T-shaped supporting plates are arranged at intervals of 4m along the traveling direction of the net rack, the T-shaped supporting plates are connected with the T-shaped supporting plates through fasteners and bolts, the purlines are connected with the T-shaped supporting plates through bolts, the distance between every two main purlines is 4m, and the dust-raising-prevention ventilation unit is installed on the secondary purlines through galvanized self-tapping screws.
The dustproof ventilation unit can adopt a dustproof ventilator with the patent number Z L201820326434.4, the length of the body is 5m, and the width of the body is 2 m.
The T-shaped supporting plate is formed by welding two steel plates, the material is Q235B, the size of the transverse steel plate is 400 x 170 x 12mm, the size of the longitudinal steel plate is 400 x 150 x 12mm, the 400mm edge of the longitudinal steel plate is coincidently welded with the 400mm center line of the transverse steel plate, and mounting holes are reserved in the transverse steel plate of the T-shaped part and used for mounting the main purline and the secondary purlines.
The purline is made of high-frequency welding hot-dip galvanized square steel and is made of Q235B; the thickness of the purline is more than or equal to 2.5 mm. The hot dip galvanizing zinc plating amount of the purline is not less than 350g per square meter. All purlines are prefabricated in factories, are connected by galvanized bolts on site, are pre-punched and are not allowed to be welded.
Various other modifications and changes may be made by those skilled in the art based on the above-described technical solutions and concepts, and all such modifications and changes are intended to fall within the scope of the claims.
Claims (7)
1. A kind of tunnel portal piston wind raise dust governance device, install in orbit both sides and extend to the tunnel from the tunnel portal, its characteristic is that the said governance device is made up of concrete foundation, main supporting structure, wind-inhibiting layer, dust-blocking layer; the main bearing structure is installed on the concrete foundation, installs the dust blocking layer on the main bearing structure and presses down the wind layer, and the dust blocking layer is located main bearing structure's the outside, presses down the wind layer and is located main bearing structure's inboard.
2. The device of claim 1, wherein the outer dust-retaining layer is installed from dense to sparse segments from bottom to top along the driving direction outside the main supporting structure, and the inner wind-retaining layer is installed from dense to sparse segments from bottom to top along the driving direction inside the main supporting structure.
3. The device for treating wind-blown dust at the tunnel portal according to claim 1 or 2, wherein the main supporting structure is a square pyramid truss rod structure or a space pipe truss structure.
4. The device of claim 3, wherein the nodes of the net rack members are bolt-ball nodes; the space pipe truss structure connecting nodes are welded.
5. The device for treating the wind-blown dust at the tunnel portal piston according to claim 1, wherein the main supporting structure is an arch net rack grid structure, and purlins are arranged between the arch net racks.
6. The device for treating wind-blown dust of the piston at the tunnel portal according to claim 1, wherein the wind-resistant layer comprises a wind barrier strip, a T-shaped piece, a front clamping plate at the end part of the barrier strip, a back clamping plate at the end part of the barrier strip and a C-shaped rubber block; the net rack lower chord bolt ball is provided with a row of T-shaped pieces at equal intervals along the driving direction, the bolt ball in the T-shaped pieces and the main support structure is connected with a bolt through a clamping piece, the front clamping plate at the end part of the barrier strip penetrates through a reserved bolt hole through a bolt to be connected with the T-shaped pieces, the back clamping plate at the end part of the barrier strip is connected with the front clamping plate at the end part of the barrier strip through a bolt, a C-shaped rubber block and a wind barrier strip are clamped between the back clamping plate at the end part of the barrier strip and the front clamping plate at the end part of the barrier strip, the front clamping plate at the end part of the barrier strip and the rear clamping plate are tightly extruded.
7. The device for treating wind-blown dust of the piston at the tunnel portal according to claim 1, wherein the dust blocking layer comprises a dust-proof ventilation unit, a T-shaped supporting plate, a purline and galvanized self-tapping screws; a row of T-shaped supporting plates are arranged on the net rack upper chord bolt ball at equal intervals along the traveling direction, the T-shaped supporting plates are connected with the bolt ball in the main supporting structure through clamping pieces and bolts, the purlines are connected with the T-shaped supporting plates through bolt connection, the dustproof ventilation unit is installed on the purlines through galvanized self-tapping screws, and the upper chord outer layer of the main supporting structure is completely sealed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921147214.6U CN211006404U (en) | 2019-07-22 | 2019-07-22 | Device is administered to tunnel face piston wind raise dust |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921147214.6U CN211006404U (en) | 2019-07-22 | 2019-07-22 | Device is administered to tunnel face piston wind raise dust |
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| CN211006404U true CN211006404U (en) | 2020-07-14 |
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| CN201921147214.6U Active CN211006404U (en) | 2019-07-22 | 2019-07-22 | Device is administered to tunnel face piston wind raise dust |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110424281A (en) * | 2019-07-22 | 2019-11-08 | 山西尚风抑风墙科技有限公司 | A kind of tunnel face Piston Action Wind Dust Improvement device |
-
2019
- 2019-07-22 CN CN201921147214.6U patent/CN211006404U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110424281A (en) * | 2019-07-22 | 2019-11-08 | 山西尚风抑风墙科技有限公司 | A kind of tunnel face Piston Action Wind Dust Improvement device |
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