CN108589506A - Solar powered vehicle exhaust type of circulating and purifying multilayer viaduct - Google Patents

Abstract

The multi-storey viaduct with solar-powered vehicle exhaust circulation and purification includes a steel truss that is set above the viaduct and covers the bridge surface of the viaduct. The first layer of transparent board; the solar power generation glass and the inner layer of transparent board form a car exhaust purification chamber, and the inner sides of the left bottom and right bottom of the steel truss are connected to the bridge deck of the lowest passage layer of the viaduct through elastic sealing connectors ; The middle part of the bridge deck of the viaduct is provided with a hollow structure isolation belt, and the top of the isolation belt protrudes upwards from the concrete structure and extends into the interior of the ecological oxygenation layer. The present invention uses a closed system to collect the tail gas emitted by automobiles, and uses an air purification module to purify the tail gas, completely solves the noise problem of large-flow traffic, and can make full use of the large-area land resources of the viaduct to generate electricity, and its power generation is not affected by driving vehicles influences.

Description

Solar-powered vehicle exhaust gas circulation purification type multi-storey elevated road

technical field

The invention belongs to the technical field of roads, bridges and environmental protection, and in particular relates to a multi-layer elevated road with solar energy-powered vehicle tail gas circulation and purification type.

Background technique

In big cities and megacities, elevated roads play a role as the main artery of urban traffic. The traffic volume is large, and the exhaust gas produced also contributes a lot to air pollution. Since the elevated roads are currently open, these exhaust gases are emitted into the urban air. . The closed structure adopted by the invention can collect and purify the tail gas produced by the vehicle flow on the elevated road. The _CO2 -enriched air produced after purification is sent to the ecological module (greenhouse on the top of the elevated road), which can increase the biomass production of the greenhouse. The air purification process is driven entirely by the electricity generated by the power-generating glass covered above the elevated road, and the solar energy heats the air to drive the air circulation.

Existing similar technology has the air purification tower built in Xi'an City, but this structure is the air purification structure of single function, will occupy land separately.

The existing urban elevated roads are not covered, which has the advantage of better driving vision and the disadvantage of having adverse effects on the urban ecological environment. The adverse effects are as follows: (1) One is to exacerbate the urban heat island effect (2) The solar energy on the upper part of the elevated road is not used (3) The exhaust gas is lost to cause air pollution (4) The noise is not shielded or only shielded on both sides, due to the diffraction effect of sound There is still noise pollution to the residential areas on both sides. (5) The vibration-absorbing structure is not adopted, and the durability of the structure is poor. (6) Rain and snow have an impact on road driving, and the road surface is exposed to the sun in summer so that the road surface reaches 60-70 degrees, and the high temperature seriously affects the driving environment. Therefore, how to use the space of the existing viaduct to utilize solar energy to absorb and purify the exhaust gas of automobiles is a topic worth studying.

Contents of the invention

In order to solve the deficiencies in the prior art, the present invention provides a solar-powered automobile that saves urban land, has a shock-absorbing structure, has strong safety and reliability, blocks the noise generated by automobile driving, and purifies the tail gas discharged from the automobile on the spot. Exhaust gas circulation purification multi-layer elevated road.

In order to solve the above-mentioned technical problems, the present invention adopts the following technical solutions: solar-powered vehicle exhaust gas circulation purification type multi-layer elevated road, including a steel truss that is arranged above the viaduct and covers the bridge deck of the viaduct, the section of the steel truss is an arched structure, and the steel truss The top and outer sides of the truss are equipped with several pieces of solar power generation glass that can be opened and closed, and the bottom and inner side of the steel truss are equipped with inner transparent plates. The automobile exhaust purification chamber is formed between the solar power generation glass and the inner transparent plate. The lower ends of both sides of the clean chamber are provided with blocking plates;

The top of the viaduct is horizontally equipped with a concrete structure on which soil is laid and green plants are planted. The concrete columns of the viaduct protrude upward from the concrete structure and support the connecting steel truss. The space formed between the concrete structure layer and the steel truss is Ecological oxygenation layer, the bridge deck of the viaduct is the access layer, the access layer is at least one layer, the road below the bridge deck of the viaduct is the pavement layer, the left and right sides of the pavement layer and the access layer are auxiliary roads, the pavement layer and The left and right sides of the access layer are equipped with connecting ramps for the upper and lower floors; the inner sides of the left bottom and right bottom of the steel truss are connected to the bridge deck of the lowest access layer of the viaduct through elastic sealing connectors;

The middle part of the bridge deck of the viaduct is equipped with an isolation belt, which is a hollow structure. The top of the isolation belt protrudes upwards from the concrete structure and extends into the ecological oxygenation layer. The module is provided with a first fan located below the deep air purification module inside the isolation zone, and several fresh air outlets are provided in the passage layer on the left and right sides of the isolation zone;

The inner transparent board is respectively provided with sewage air inlets on the left and right sides of the passage layer, and the inner transparent board is respectively provided with filter air outlets on the left and right sides of the ecological oxygenation layer; the lower side of the filter air outlet is provided with an upper air purification module , the upper air purification module is filled in the automobile exhaust gas purification chamber, and a second fan located in the automobile exhaust gas purification chamber is arranged above the filter air outlet, and the air outlet of the second fan communicates with the filter air outlet.

There are two layers in the passage layer. The automobile exhaust gas purification chamber is located between the upper air purification module and the blocking plate, which are the preliminary air intake filter section, the photocatalytic section and the concentrated high-efficiency purification section from bottom to top;

When the second fan is turned on, the first fan is also turned on, and the automobile exhaust gas enters the automobile exhaust gas purification chamber from the sewage air inlet. After purification, it is discharged into the photocatalytic section. The purification mechanism of the photocatalytic section is to coat the surface of the inner transparent plate with photocatalytic material. The transparent material filter element adopts graphene filter element, and Tio2 is also coated on the graphene filter element, thus forming a multi-layer filtration and photocatalytic air purification mechanism; above the photocatalytic section is a concentrated high-efficiency purification section. The hot-pressed rising air flow is formed inside the exhaust gas purification chamber, which is purified by multi-layer high-efficiency graphene filter layers, and the photocatalysis of Sio2 coated on the surface of the inner transparent plate, so that the automobile exhaust gas can be deeply purified. The filter tuyere enters the ecological aeration layer, and a degradation product absorption and recovery module connected to the filter tuyere is set in the ecological aeration layer, and the SO ₃ obtained after the exhaust gas is purified and degraded is recovered in the degradation product absorption and recovery module; the first fan will After the fresh air inside the ecological oxygenation layer is re-evolved by the deep air purification module, it is sent to the passage layer from the fresh air outlets on the left and right sides of the isolation belt, and the automobile exhaust in the passage layer is sucked by the second fan through the sewage air The inlet is discharged into the automobile exhaust purification chamber, and thus circulates to realize the purification of the automobile exhaust in the passage layer.

The left and right sides of the bottom of the steel truss are respectively provided with horizontal sumps, the horizontal sumps are set along the length of the steel truss, the ground is equipped with an underground rainwater storage device, and the horizontal sump is connected with a downpipe leading to the underground rainwater storage device .

The suspended planting boxes located in the automobile exhaust purification chamber are hung on the steel truss. The suspended planting boxes are arranged in rows along the length direction of the elevated road, and each column is spaced at a certain distance. Drip irrigation pipes are arranged above the ecological oxygenation layer and on the steel truss in the automobile exhaust purification chamber. The drip irrigation pipes are connected with drip irrigation faucets above each suspended planting box. The lower part of the drip irrigation pipes is above the ecological oxygenation layer. Provided with sprinklers.

The sound-absorbing and noise-reducing structure is arranged on the right side of the left concrete column of the access layer and the left side of the right-side concrete column, and there is a gap between the bottom of the sound-absorbing and noise-reducing structure and the road surface of the access layer; the sound-absorbing and noise-reducing structure is Green concrete or three-dimensional stacking of shade-tolerant plants, or a sound-absorbing and noise-reducing structure with metal perforated panels lined with sound-absorbing materials.

The steel truss is supported on the concrete column rising above the ecological oxygenation layer. Both ends of the steel truss are cantilevered. There are several pieces of solar power generation glass. The power generation glass is installed on the cylindrical light steel skeleton grid. The cylindrical light steel skeleton grid has a cylindrical curved surface as a whole. The inner side of the cylindrical light steel skeleton grid is reinforced by high-strength and lightweight cables, and the high-strength and lightweight cables are made of carbon fiber. Cable, high-strength steel wire cable or steel strand cable; the high-strength lightweight cable and the cylindrical light steel skeleton grid are supported by rigid rods that can be manually adjusted in length; the cylindrical light steel skeleton grid, high-strength and lightweight The stay cables, rigid members and steel trusses together form the structural support layer of the viaduct roof.

LED lights are arranged inside the automobile exhaust purification chamber. The lights at night can add beautiful scenery to the city through the solar power glass. At the same time, they are used as night lighting for the auxiliary roads on both sides of the access floor. The connecting ramps on the upper and lower floors are equipped with artificial lighting systems at night.

Adopting the above-mentioned technical scheme, the structure of the multi-layer ecological elevated road of the present invention is respectively an ecological aeration layer, an upper access layer, a lower access layer and a ground layer from top to bottom; the top and sides of the steel truss are all covered with solar power glass, such as tellurium Cadmium chloride power generation glass is not limited to this, the general structure and each functional module of the present invention are described as follows:

Overall structure: The present invention proposes to use an enclosure structure (the structural support layer of the viaduct roof) with power generation function, ecological function and air purification function to close the three-dimensional elevated road, so that automobile exhaust can be collected and purified in the enclosure structure , the system can be intelligently controlled. The air purification module is the main innovation point and core module of the present invention. In addition, it also includes power generation module, ecological aeration module, rainwater utilization module and environmental control module (sound, light and heat).

The ecological oxygen-increasing layer can be used as an indoor greening leisure place in the city and as an urban facility agriculture. The ecological aerobic layer is the top layer of the multi-layer concrete frame structure, and the concrete structure layer is covered with soil.

The upper access level is two-way four-lane or six-lane, with a clear height of 5 meters. The lanes in the two directions are separated by a hollow isolation belt, and the space outside the lane is rescue and maintenance space. At the same time, a connecting ramp between the upper and lower floors connecting the lower access layer and the lower access layer is set here.

The lower access layer is two-way four-lane or six-lane, with a clear height of 5 meters. The lanes in the two directions are separated by a hollow isolation belt, and the space outside the lane is rescue and maintenance space. At the same time, a connecting ramp between the upper and lower floors connecting the lower access layer and the lower access layer is set here.

1. Air purification module: an important module for realizing the ecological functions of the multi-layer ecological elevated road. The envelope consists of two upper air purification modules on the left and right.

The automobile exhaust purification chamber is a semi-cylindrical cavity structure. High-efficiency transparent material filter elements (multi-layer graphene filters can be used but not limited to) can be arranged in the automobile exhaust purification chamber, and the interval is greater than twice the thickness of the automobile exhaust purification chamber, that is, greater than 50-60cm, so as not to affect the penetration of natural light Inside the viaduct.

The upper air purification module is made of non-combustible high-strength transparent ultra-thin transparent material, adopts watertight and airtight structure, and is fixed on the cylindrical grille. The second fan sends the multi-purified air into the upper ecological oxygenation layer, which can deeply purify the air to the air quality standard that can be used for facility agriculture, and then send _CO2 -enriched air without other harmful air pollutants into facility agriculture module, and then the fresh air after biological oxygenation is sucked by the upper first fan and filtered by the air deep purification module, and then sent to the passage layer through the fresh air outlet on the isolation belt.

Under suitable climate conditions, the system can form a natural heat-pressure cycle. Under unfavorable conditions, it is driven by solar photovoltaic glass power generation (which can realize low-light power generation) to force the internal circulation and purification of air. Due to the design of full-coverage solar power glass that can intelligently adjust the opening angle on the elevated road, it can provide sufficient power to drive the internal air circulation system to purify the exhaust gas of the vehicle.

In all cases, the exhaust gas emitted by the traffic layer of the elevated road does not directly enter the external atmosphere, but undergoes a purification and oxygenation cycle inside the elevated road.

2. Solar power generation module: The most important part of the power generation module is the solar photoelectric glass covering the outer layer of the enclosure structure. The solar photoelectric glass can be opened and closed by an intelligent system, and connected to the municipal power grid. It is equipped with a DC to AC device. Electricity can be transmitted to the municipal grid.

3. Ecological oxygenation module: The ecological oxygenation module is composed of the upper ecological layer and the suspended planting box. Green plants are planted in the suspended planting box, and the suspended planting box can be lifted to the ecological layer by a mechanical device for planting or harvesting operations. To ensure food safety, the ecological chain is designed so that the products of the facility agriculture module do not enter the human food chain, but generate economic benefits in other ways. For example, the products of facility agriculture can be flowers, biomass (for renewable energy), and building materials Raw materials, and for papermaking, etc.

4. Rainwater collection and green plant drip irrigation module: a horizontal rain-collecting trough is installed outside the bottom of the arched enclosure structure, which is connected to the downpipe. When it rains heavily, the solar photoelectric glass is closed, and the horizontal rain-collecting trough can collect rainwater flowing from the outer surface , transported to the underground rainwater storage tank, and set up drip irrigation pipes to water the green plants by drip irrigation. In moderate rain and light rain, the intelligent control system can keep the solar power generation glass in the open state, so that the suspended planting box can accumulate part of the rainwater; by adjusting the parameters of the intelligent control system, the solar power generation glass can also be made closure.

5. Vibration-absorbing structure system: Another innovation of the present invention is the adoption of a vibration-absorbing structure. The main vibration-absorbing component is a suspended planting box, and the louver-shaped solar power generation glass can also play a role in absorbing vibration.

As mentioned above, the solar power generation glass is a transparent power generation glass with intelligent control of opening and closing and angle adjustment, and is installed on a cylindrical light steel skeleton grid. The solar power generation glass is controlled by an intelligent control system. The intelligent control system can determine the opening and closing and opening angle of the solar power generation glass according to the external environment changes.

6. Noise control module: Elevated roads are the backbone of urban traffic, with a large traffic flow, and the noise impact on surrounding buildings cannot be ignored. Since the present invention adopts a closed enclosure structure, favorable conditions are created for noise control. In the present invention, a sound-absorbing and noise-reducing structure is added to the side of the concrete column. The sound-absorbing and noise-reducing structure can be three-dimensionally stacked with green concrete (planted with shade-tolerant plants), or it can be a metal perforated plate lined with sound-absorbing materials. The sound-absorbing structure depends on the specific project. The function of noise control is mainly realized by the closed outer protective structure. For this reason, the outer protective structure is composed of a closed inner purification chamber and an openable outer purification chamber, both of which can play a role of noise barrier. The inner layer material and the outer layer material of the automobile exhaust gas purification chamber adopt transparent plates with different thicknesses to avoid the coincidence effect. The planting boxes of the outer green plants can be sprayed with fibrous materials with photocatalytic function to enhance air purification and sound absorption and noise reduction effects (it can be used as a space sound absorber).

7. Night scene lighting: LED lights are arranged on the inner side of the outermost glass of the enclosure structure. The lights at night can add beautiful scenery to the city through the glass, and at the same time serve as night lighting for the auxiliary roads on both sides. The upper and lower passages are equipped with artificial lighting systems at night.

The above 7 sub-item modules are not completely separated, but play the function of the ecological elevated road as a whole.

The present invention proposes an original new elevated road structure, which collects and purifies the tail gas generated by the inner lanes through a closed enclosure structure, and can realize zero or negative emission of the elevated road (single-layer or multi-layer). More than 90% of the area of the elevated road vault is installed with transparent solar panels or solar power generation glass. The generated electricity can be used to drive the air purification module. This is the first use of solar energy.

Below the enclosure structure is an ecological oxygenation layer, whose vegetation converts solar energy into biomass energy, which is the second utilization of solar energy. The solar photoelectric glass adopts intelligent control, and its opening angle can be adjusted to facilitate the adjustment of the ventilation and heat and humidity environment of the elevated road. It can play a role of sunshade in summer and heat preservation in winter. (3) The closed enclosure structure and the suspended air purification module can effectively shield and absorb vehicle noise and prevent it from spreading out of the elevated road. (4) The present invention especially adopts the outer protection structure suspended on both sides, and adopts a flexible two-way cable structure, and the planting box is suspended on it. This vibration-absorbing combination can effectively absorb the impact of the vehicle on the viaduct structure Vibration energy, improving structural durability. (5) Due to the closed structure, it can avoid the adverse effects of extreme weather such as rain, snow and heat on the driving environment, and create a comfortable driving environment by using solar energy to adjust the air temperature and humidity in the passage layer.

Compared with the existing viaduct, the main advantage of the present invention is that the closed system is used to collect the tail gas emitted by the vehicles, and the air purification module is used to purify the tail gas. At the same time, compared with the semi-enclosed noise reduction wall of the existing viaduct, the closed structure proposed by the present invention can thoroughly solve the noise problem of large-flow traffic. The fully covered photovoltaic power generation transparent enclosure structure set by the present invention can make full use of the large-area land resources of the viaduct to generate electricity. Considering the vast area covered by the viaduct and the existing mature photovoltaic power generation technology, this measure has significant economic and environmental benefits , which is another power generation method different from the photovoltaic power generation laid on the road surface, and its power generation is not affected by driving vehicles.

Description of drawings

Fig. 1 is a structural schematic diagram of the present invention.

Detailed ways

As shown in Figure 1, the multi-storey viaduct of solar-powered automobile tail gas circulation purification type of the present invention comprises the steel truss 1 that is arranged on the viaduct top and covers the deck of the viaduct, the section of the steel truss 1 is an arched structure, and the steel truss 1 There are several pieces of solar power generation glass 2 that can be opened and closed on the top and outer side of the steel truss 1. The bottom and inner side of the steel truss 1 are provided with an inner layer transparent plate 3, and an automobile exhaust purification system is formed between the solar power generation glass 2 and the inner layer transparent plate 3. Chamber 5, the lower end of the automobile exhaust purification chamber 5 is provided with a blocking plate 6;

The top of the viaduct is horizontally provided with a concrete structure 7 on which soil is laid and green plants are planted. The concrete column 30 of the viaduct protrudes upwards from the concrete structure 7 and supports and connects the steel truss 1 . The space formed between 1 is the ecological oxygenation layer 39, the bridge deck of the viaduct is the access layer 8, and the access layer 8 is at least one layer, and the road surface below the bridge deck of the viaduct is the road surface layer 9, and the road surface layer 9 and the access layer 8 The left and right sides are auxiliary roads, and the left and right sides of the pavement layer 9 and the access layer 8 are provided with connecting ramps for the upper and lower layers; the inner sides of the left bottom and right bottom of the steel truss are connected by elastic seals 10 is connected with the bridge deck of the viaduct lowermost layer 8; the elastic sealing connecting body 10 also plays the role of buffering and shock absorption.

The middle part of the bridge deck of the viaduct is provided with an isolation zone 11, the isolation zone 11 is a hollow structure, the top of the isolation zone 11 protrudes upwards from the concrete structure 7 and extends into the inside of the ecological aeration layer 39, and the top of the isolation zone 11 is provided with The deep air purification module 12 that layer 39 communicates is provided with the first blower fan 13 below the deep air purification module 12 inside the isolation belt 11, and the left side and the right side of the isolation belt 11 are provided with several a fresh air outlet;

Inner layer transparent plate 3 is respectively provided with dirty air inlet 14 on the left side and the right side of channel layer 8, and inner layer transparent plate 3 is respectively provided with filter tuyere 15 on the left and right sides of ecological aeration layer 39; The upper air purification module 17 is arranged on the side, and the upper air purification module 17 is filled in the automobile exhaust purification chamber 5. The top of the filter air outlet 15 is provided with a second fan 18 located in the automobile exhaust purification chamber 5, and the air outlet of the third fan 18 It communicates with the filter tuyere 15.

The passage layer 8 is provided with two layers, and the automobile exhaust purification chamber 5 is divided from bottom to top between the upper air purification module 17 and the blocking plate 6 into an air intake preliminary filter section 20, a photocatalytic section 21 and a concentrated high-efficiency purification section 22;

When the third blower fan 18 was turned on, the first blower fan 13 was also turned on, and the automobile exhaust gas entered the automobile exhaust gas purification chamber 5 by the polluted air inlet 14. After the preliminary filtration and purification of the layer filter layer, it is discharged into the photocatalytic section 21. The purification mechanism of the photocatalytic section 21 is to coat the surface of the inner transparent plate 3 with a photocatalytic material. 5 Arrange transparent material filter elements at regular intervals. The transparent material filter elements use graphene filter elements, and Tio2 is also coated on the graphene filter elements, thus forming a multi-layer filtration and photocatalytic air purification mechanism; above the photocatalytic section 21 is a centralized and efficient purification section 22. The action mechanism of the concentrated and efficient purification section 22 is to form a hot-pressurized updraft inside the automobile exhaust purification chamber 5, which is purified by a multi-layer high-efficiency graphene filter layer, and the photocatalysis of Sio2 coated on the surface of the inner transparent plate 3, The exhaust gas of the automobile is deeply purified, and the purified exhaust gas enters the ecological oxygenation layer 39 through the filter air outlet 15 in the whole process. A degradation product absorption and recovery module connected to the filter air outlet 15 is arranged in the ecological oxygenation layer 39, and the exhaust gas is purified. _The SO3 obtained after degradation is concentratedly recovered in the degradation product absorption and recovery module; the first fan 13 sends the fresh air inside the ecological oxygenation layer 39 through the fresh air outlets on the left and right sides of the isolation belt 11 after the re-evolution of the deep air purification module 12. Enter the passage layer 8, the automobile exhaust in the passage layer 8 is discharged into the automobile exhaust purification chamber 5 through the sewage air inlet 14 under the suction effect of the second fan, and thus circulates to realize the purification of the automobile exhaust in the passage layer 8 purify.

The left side and the right side of the bottom of the steel truss 1 are respectively provided with horizontal water collection tanks 24, and the horizontal water collection tanks 24 are arranged along the length direction of the steel truss 1. An underground rainwater storage device is arranged on the ground, and the horizontal water collection tanks 24 are connected to the underground rainwater tanks. The downpipe 25 of the storage device.

The suspended planting box 26 located in the automobile exhaust purification chamber 5 is suspended on the steel truss 1, and drip irrigation water pipes 27 are arranged on the steel truss 1 above the ecological oxygenation layer 39 and in the automobile exhaust purification chamber 5 on the steel truss 1 The drip irrigation water pipe 27 is connected with a drip irrigation faucet 28 above each suspended planting box 26, and the bottom of the drip irrigation water pipe 27 is provided with a nozzle above the ecological aeration layer 39. The suspended planting box 26 is automatically lifted to the ecological oxygenation layer by a mechanical device for operation, and the automatic lifting system is controlled by an intelligent control system.

On the right side of the concrete column 30 on the left side of the passage layer 8 and on the left side of the concrete column 30 on the right side, a sound-absorbing and noise-reducing structure 31 is provided, and there is a gap between the bottom of the sound-absorbing and noise-reducing structure 31 and the road surface of the passage layer 8; The sound-absorbing and noise-reducing structure 31 is made of three-dimensionally stacked green concrete or shade-tolerant plants, or a sound-absorbing and noise-reducing structure with metal perforated plates lined with sound-absorbing materials.

The steel truss 1 is supported on the concrete column 30 that rises above the ecological oxygenation layer 39. The two ends of the steel truss 1 are cantilevered. There are several pieces of solar power generation glass 2, and each piece of solar power generation glass 2 is intelligently controlled to open and close. The angle adjustment structure, the solar power generation glass 2 is installed on the cylindrical light steel skeleton grid, the cylindrical light steel skeleton grid is a cylindrical curved surface as a whole, and the inner side of the cylindrical light steel skeleton grid is reinforced by high-strength light weight cables 32 , The high-strength and light-weight cables 32 adopt carbon fiber cables, high-strength steel wire cables or steel strand cables. The high-strength and light-weight stay cables 32 and the cylindrical light-weight steel skeleton grid are supported by rigid rods 33 whose length can be adjusted manually; Together they form the structural support layer of the viaduct roof.

LED lights are arranged inside the automobile exhaust purification chamber 5, and the lights at night can add beautiful scenery to the city through the solar power generation glass 2. At the same time, they are used as night lighting for the auxiliary roads on both sides of the access layer 8, and artificial lighting at night is provided for the connecting ramps on the upper and lower floors. system.

This embodiment does not impose any formal restrictions on the shape, material, structure, etc. of the present invention. All simple modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention belong to the protection of the technical solution of the present invention. scope.

Claims (7)

1. The multi-storey viaduct with solar energy-powered vehicle exhaust circulation purification is characterized in that it includes a steel truss that is arranged above the viaduct and covers the bridge deck of the viaduct. The section of the steel truss is an arched structure. There are several pieces of solar power generation glass that can be opened and closed. The bottom and inner side of the steel truss are provided with an inner transparent plate. The automobile exhaust purification chamber is formed between the solar power generation glass and the inner transparent plate. The lower ends of both sides of the automobile exhaust purification chamber are There is a blocking plate; The top of the viaduct is horizontally equipped with a concrete structure on which soil is laid and green plants are planted. The concrete columns of the viaduct protrude upward from the concrete structure and support the connecting steel truss. The space formed between the concrete structure layer and the steel truss is Ecological oxygenation layer, the bridge deck of the viaduct is the access layer, the access layer is at least one layer, the road below the bridge deck of the viaduct is the pavement layer, the left and right sides of the pavement layer and the access layer are auxiliary roads, the pavement layer and The left and right sides of the access layer are equipped with connecting ramps for the upper and lower floors; the inner sides of the left bottom and right bottom of the steel truss are connected to the bridge deck of the lowest access layer of the viaduct through elastic sealing connectors; The middle part of the bridge deck of the viaduct is equipped with an isolation belt, which is a hollow structure. The top of the isolation belt protrudes upwards from the concrete structure and extends into the ecological oxygenation layer. The module is provided with a first fan located below the deep air purification module inside the isolation zone, and several fresh air outlets are provided in the passage layer on the left and right sides of the isolation zone; The inner transparent board is respectively provided with sewage air inlets on the left and right sides of the passage layer, and the inner transparent board is respectively provided with filter air outlets on the left and right sides of the ecological oxygenation layer; the lower side of the filter air outlet is provided with an upper air purification module , the upper air purification module is filled in the automobile exhaust gas purification chamber, and a second fan located in the automobile exhaust gas purification chamber is arranged above the filter air outlet, and the air outlet of the second fan communicates with the filter air outlet. 2. The solar-powered automobile exhaust circulation purification type multi-layer elevated road according to claim 1, characterized in that: the passage layer is provided with two layers, and the automobile exhaust purification chamber is arranged in sequence from bottom to top between the upper air purification module and the blocking plate It is the preliminary air filter section, the photocatalytic section and the centralized and efficient purification section; When the second fan is turned on, the first fan is also turned on, and the automobile exhaust gas enters the automobile exhaust gas purification chamber from the sewage air inlet. After purification, it is discharged into the photocatalytic section. The purification mechanism of the photocatalytic section is to coat the surface of the inner transparent plate with photocatalytic material. The transparent material filter element adopts graphene filter element, and Tio2 is also coated on the graphene filter element, thus forming a multi-layer filtration and photocatalytic air purification mechanism; above the photocatalytic section is a concentrated high-efficiency purification section. The hot-pressed rising air flow is formed inside the exhaust gas purification chamber, which is purified by multi-layer high-efficiency graphene filter layers, and the photocatalysis of Sio2 coated on the surface of the inner transparent plate, so that the automobile exhaust gas can be deeply purified. The filter tuyere enters the ecological aeration layer, and a degradation product absorption and recovery module connected to the filter tuyere is set in the ecological aeration layer, and the SO ₃ obtained after the exhaust gas is purified and degraded is recovered in the degradation product absorption and recovery module; the first fan will After the fresh air inside the ecological oxygenation layer is re-evolved by the deep air purification module, it is sent to the passage layer from the fresh air outlets on the left and right sides of the isolation belt, and the automobile exhaust in the passage layer is sucked by the second fan through the sewage air The inlet is discharged into the automobile exhaust purification chamber, and thus circulates to realize the purification of the automobile exhaust in the passage layer. 3. The multi-storey elevated road with solar energy-powered vehicle exhaust circulation and purification according to claim 1, characterized in that: the left and right sides of the bottom of the steel truss are respectively provided with horizontal water collection tanks, and the horizontal water collection tanks are arranged along the length direction of the steel truss , the ground is provided with an underground rainwater storage device, and the horizontal sump is connected with a downpipe leading to the underground rainwater storage device. 4. The multi-layer elevated road with solar energy-powered automobile tail gas circulation and purification according to claim 3 is characterized in that: the steel truss is hung with a suspended planting box located in the automobile exhaust purification chamber, and the suspended planting box is along the length direction of the elevated road Arranged in rows, with a certain distance between each row, the outer wall of the suspended planting box is coated with photocatalytic materials, and drip irrigation pipes are arranged on the steel truss above the ecological oxygenation layer and in the automobile exhaust purification chamber on the steel truss. A drip irrigation faucet located above each suspended planting box is connected, and the lower part of the drip irrigation water pipe is provided with a nozzle above the ecological aeration layer. 5. The solar-powered vehicle exhaust gas circulation purification type multi-layer elevated road according to claim 1, characterized in that: a sound-absorbing and noise-reducing structure is arranged on the right side of the left concrete column of the access layer and the left side of the right concrete column , there is a gap between the bottom of the sound-absorbing and noise-reducing structure and the road surface of the passage layer; the sound-absorbing and noise-reducing structure is made of green concrete or shade-tolerant plants stacked three-dimensionally, or the sound-absorbing material of the metal perforated plate lined with sound-absorbing materials Noise canceling construction. 6. The multi-storey elevated road with solar-powered vehicle tail gas circulation and purification according to claim 1, characterized in that: the steel truss is supported on the concrete column rising above the ecological oxygenation layer, the two ends of the steel truss are cantilevered, and solar power is generated There are several pieces of glass, and each piece of solar power glass is an intelligently controlled opening and closing and angle adjustment structure. The solar power glass is installed on a cylindrical light steel skeleton grid, and the cylindrical light steel skeleton grid is a cylindrical curved surface as a whole. The inner side of the cylindrical light steel skeleton grid is reinforced by high-strength lightweight cables, which use carbon fiber cables, high-strength steel wire cables or steel strand cables; high-strength lightweight cables and cylindrical light steel skeleton mesh The compartments are supported by rigid rods whose length can be adjusted manually; the cylindrical light steel skeleton grid, high-strength lightweight cables, rigid rods and steel trusses together form the structural support layer of the viaduct roof. 7. The solar-powered vehicle exhaust circulation purification type multi-layer elevated road according to claim 1, characterized in that: LED lights are arranged inside the vehicle exhaust purification chamber, and the lights at night can add beautiful scenery to the city through solar power generation glass, and at the same time As the night lighting of the auxiliary roads on both sides of the access floor, the connecting ramps of the upper and lower floors are equipped with artificial lighting systems at night.