CN205840905U - A kind of dynamic air exhausting device of tunnel ventilation - Google Patents

Abstract

This utility model belongs to highway tunnel ventilation field, and disclose a kind of dynamic air exhausting device of tunnel ventilation, this device includes separation panel air port and the interflow exhaust outlet being located in tunnel, described separation panel air port is arranged on 100m～the 200m position of distance tunnel exit, 15%～20% position that it is tunnel total length with tunnel exit distance that described interflow exhaust outlet is arranged on；Described separation panel air port is all connected with tunnel with one end of interflow exhaust outlet, and the other end is all connected with air draft machine room and exhaust chimney by contact air channel.This utility model can select the exhaust way of more low energy consumption according to traffic, enrich tunnel exhaust way, achieve the dynamic regulation of tunnel ventilation, both ensure that air quality in tunnel, save fan operation energy consumption the most to greatest extent, have easy to adjust, the advantages such as operation cost is low, good energy-conserving effect.

Description

A kind of dynamic air exhausting device of tunnel ventilation

Technical field

This utility model belongs to highway tunnel ventilation field, more particularly, to a kind of dynamic air exhausting device of tunnel ventilation.

Background technology

In vcehicular tunnel, continuous emission when running car is in tunnel, cause CO, NOx and particulate matter in tunnel Significantly raise Deng concentration of harmful substance.At present, in vcehicular tunnel, waste gas discharge most common method is that hole is directly discharged and wind tower High altitude discharge.Wherein, hole is directly discharged and is applicable to mountain tunnel and the shorter urban transportation tunnel of length；Wind tower high altitude discharge Urban transportation tunnel is widely used, is often the environmental sensitive area such as business and residential block due to city tunnel hole, use The mode of wind tower high altitude discharge can effectively protect surrounding sensitive spot, and overall cost is low, is a kind of simple and reliable air draft Mode, is also the main exhaust way of tunnel, current domestic city employing.

At present for wind tower high altitude discharge mode, first require to determine air draft according to urban planning, view, environmental impact assessment etc. Tower position, is determined air draft Host equipment room nearby by exhaust chimney position the most again, is finally determined concentration nearby by air draft Host equipment room Exhaust outlet position, by integrated air exhaust mouth tunnel is divided into entrance and two ventilation sections of outlet section, exhaust outlet can be located at away from Tunnel exit more closely or farther out position.Blowdown mode is concentrated for wind tower, has wind tower shunt sewage discharge and interflow blowdown two kinds fortune Battalion's pattern, two ways independent operating, shunt sewage discharge mode is applicable to the normal row turner condition that road speed is higher, collaborates blowdown It is applicable to the retardance operation operating mode that road speed is relatively low.

But, there is following two drawback in the exhaust way of existing two kinds of independent operatings:

1) when exhaust outlet distance tunnel exit is nearer, when the gas that can cause outlet section only with wind tower interflow blowdown mode Flow short-circuit, causes the increase of operation energy consumption, and concrete reason is that under retardance operation operating mode, in tunnel, speed is relatively low, ventilation by trattic masterpiece Consider for resistance, jet blower secondary ventilation need to be opened, owing to length at entry is much larger than exit length, therefore collaborate blowdown Time there will be air flow shortcircuit, major part waste gas is discharged by wind tower by exporting, and in order to meet entrance required airflow requirement, need to enter one Step increases entrance jet blower and opens number of units or increase exhaust air rate in wind tower, and operating cost thus can be caused to increase；

2) exhaust outlet away from tunnel exit farther out time, when causing entrance, outlet only with wind tower shunt sewage discharge mode Section and the increase of wind tower exhaust air rate, cause the increase of operating cost, and concrete reason is owing to exit length is longer, in order to meet The ambient air quality requirement of outlet section resh air requirement and tunnel portal, need to the ventilation of the section of increasing export, and air draft should be reduced Pollutant levels at tower；Due to the reduction of pollutant levels at wind tower, and exhaust outlet distance outlet is farther out, in order to ensure wind The exhausted air quantity of tower discharge meets requirement, need to increase the exhaust air rate of wind tower, simultaneously because the pollutant levels of wind tower discharge are relatively low, and tunnel The new wind of road entrance fails effectively to utilize just discharges tunnel, has further resulted in the waste of energy consumption；Further, since outlet section and In exhaust chimney, air quantity increases simultaneously, and therefore entrance air quantity also needs to increase accordingly.

To sum up, when exhaust outlet away from tunnel exit farther out or nearer time, only with the interflow blowdown or wind tower shunt sewage discharge of wind tower Carry out tunnel blowdown, be required for increasing wind tower exhaust air rate, increase operation energy consumption and operating cost.Therefore, design one it is badly in need of suitable For the dynamic air exhausting device of tunnel ventilation, while meeting tunnel air draft needs, effectively reduce operating cost and energy consumption.

Utility model content

For disadvantages described above or the Improvement requirement of prior art, this utility model provides a kind of dynamic air draft of tunnel ventilation Device, wherein combine the feature of tunnel air draft under different traffic operating mode, and respective design is applicable to the dynamic air draft of tunnel ventilation Device, it, by arranging two groups of different integrated air exhaust mouths at the two of tunnel, is used at one shunting air draft, is used for collaborating at one Air draft, to enable different exhaust outlets according to traffic operating modes different in tunnel, reaches the purpose of ventilating system energy-saving run, tool There are the advantages such as enforcement is convenient, operation cost is low, and can be the most energy-conservation.

For achieving the above object, the utility model proposes a kind of dynamic air exhausting device of tunnel ventilation, this device includes setting Separation panel air port in tunnel and interflow exhaust outlet, described separation panel air port is arranged on 100m～200m of distance tunnel exit Position, described interflow exhaust outlet is arranged on 15%～20% position that the distance with tunnel exit is tunnel total length；Described Separation panel air port is all connected with tunnel with one end of interflow exhaust outlet, and the other end is all by contact air channel and air draft machine room and row Wind tower is connected.

As it is further preferred that described separation panel air port is arranged on the 150m position of distance tunnel exit.

As it is further preferred that described interflow exhaust outlet is arranged on be tunnel total length with tunnel exit distance 18% Put place.

As it is further preferred that described separation panel air port uses bypass type ventilation shaft air draft pattern to carry out air draft, it is arranged Dirty amount is not less than 70%；Described interflow exhaust outlet uses confluent type ventilation shaft air draft pattern to carry out air draft, and its blowdown flow rate is 100%.

As it is further preferred that described bypass type ventilation shaft air draft pattern particularly as follows: using tunnel traffic draft power as Air draft power, a tunnel internal contamination thing part is discharged from exhaust outlet, a part of from tunnel exit discharge.

As it is further preferred that described confluent type ventilation shaft air draft pattern particularly as follows: using tunnel traffic draft power as Exhaust resistance, internal contamination thing in tunnel is all discharged from exhaust outlet.

As it is further preferred that when the average speed in tunnel more than or equal to 40km/h time, open separation panel air port with Use separation panel mode playback to carry out air draft, when the speed in tunnel is less than 40km/h, open interflow exhaust outlet to use interflow Discharge mode carries out air draft.

In general, by the contemplated above technical scheme of this utility model compared with prior art, mainly possess with Under technological merit:

1. this utility model arranges two groups of special exhaust outlets by not existing together in tunnel, and is respectively used to collaborate blowdown And shunt sewage discharge, with according to tunnel difference operation ventilation operating mode, select to open the exhaust outlet under corresponding operating mode, effectively realize tunnel The energy-saving run of ventilating system, compares tradition ventilation mode, and its fractional energy savings is up to 5%～10%, and practicality is stronger.

2. this utility model passes through research and experiment, it is thus achieved that the optimal setting positions of two groups of exhaust outlets, wherein shunts air draft Mouth is arranged on 100m～the 200m position of distance tunnel exit, and interflow exhaust outlet is arranged on complete for tunnel with tunnel exit distance 15%～20% long position, and using the average speed in tunnel as the foundation of selection air draft pattern, tunnel can be realized Optimal air draft, and energy consumption is minimum.

3. this utility model uses wind tower shunt sewage discharge mode when normal row turner condition, opens separation panel air port, closes Interflow exhaust outlet, wind tower blowdown flow rate is no less than the 70% of the tunnel total length total amount of pollutant；Wind tower is used to close when blocking driving operating mode Stream blowdown mode, closes separation panel air port, opens interflow exhaust outlet, opens different air drafts according to difference ventilation operating mode correspondence Mouthful, can effectively realize the dynamic regulation of Tunnel Ventilation System, shaping modes is simple and convenient to operate.

4. this utility model has the advantage of diverse in function, simple in construction, the most not only can realize shunt sewage discharge but also Can realize collaborating blowdown, structurally only need to increase by one group of exhaust outlet compared to traditional air draft well, under two kinds of air draft patterns Sharing a set of exhaust blower, two groups of exhaust outlets cooperate and coordinate, it is achieved the dynamic air draft in tunnel.

Accompanying drawing explanation

Fig. 1 is the structural representation of the dynamic air exhausting device of a kind of tunnel ventilation that this utility model embodiment provides.

Detailed description of the invention

In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with accompanying drawing and enforcement Example, is further elaborated to this utility model.Should be appreciated that specific embodiment described herein is only in order to explain This utility model, is not used to limit this utility model.Additionally, institute in each embodiment of this utility model disclosed below Just can be mutually combined as long as the technical characteristic related to does not constitutes conflict each other.

Ultimate principle of the present utility model is to utilize the dynamic row in the existing tunnel of the two groups of integrated air exhaust causes for gossip being located in tunnel Wind, one of which is applicable to separation panel and knocks off condition, and another group is applicable to interflow discharge operating mode, according to traffic works different in tunnel Condition, reasonably opens corresponding exhaust outlet, it is achieved the interflow blowdown of wind tower and the Appropriate application of two kinds of blowdown modes of shunt sewage discharge, enters And realize the dynamic regulation of tunnel ventilation, have easy to adjust, the advantages such as operation cost is low, good energy-conserving effect.

As it is shown in figure 1, the dynamic air exhausting device of a kind of tunnel ventilation that this utility model embodiment provides, this device is arranged in The inside in tunnel 1, for realizing the ventilation in tunnel, this tunnel 1 is provided with tunnel entrance 2 and tunnel exit 3, and direction of traffic is from tunnel Road import extends to tunnel exit, and described air exhausting device includes the two groups of integrated air exhaust mouths being located in tunnel, including shunting air draft Mouth 5 and interflow exhaust outlet 6, wherein separation panel air port 5 is specifically located at 100m～the 200m position of distance tunnel exit 3, excellent Choosing is arranged on the 150m position of distance tunnel exit 3, and its air draft pattern using confluent type ventilation shaft to discharge carries out air draft, will This exhaust outlet is referred to as separation panel air port 5.

Concrete, bypass type ventilation shaft discharge formula is specifically using tunnel traffic draft power as air draft power, dirty in tunnel A dye thing part is discharged from exhaust outlet, and a part is discharged from tunnel exit, and its blowdown flow rate is not less than 70%.

Wherein, separation panel air port 5 specifically arranges the selection of position and is determined in the following way:

(1) known: tunnel information, vehicle flowrate, speed

(2) assume: being 1 section at tunnel portal section to exhaust outlet, exhaust outlet section to tunnel outlet section is 2 sections, and exhaust outlet arrives Exhaust chimney outlet is 3 sections, is respectively provided with pollutant levels sensor, records at tunnel entrance, exhaust outlet and tunnel exit Pollutant levels are respectively c₀、c₁、c₂, entrance and the actual ventilation of outlet section are respectively Q₁、Q₂。

(3) design calculates: the determination of separation panel tuyere position

(3.1) for ensureing hole environmental requirement, usual wind tower blowdown flow rate is not less than the 70% of tunnel internal contamination thing total amount, by In tunnel, speed is higher, and vehicle travels the Piston Action Wind produced relatively greatly, and remaining pollutant is discharged by tunnel portal, then have:

Exhaust outlet pollutant output/tunnel entirety pollutant generation amount >=70%

$\frac{(Q_1-Q_2)\·c_1}{\[Q_1\·c_1+Q_2\·(c_2-c_1)\]}\≥70\%$

(3.2) impact on permanent ventilation of tunnel energy consumption of the exhaust outlet position is considered, it is assumed that exhaust outlet is respectively at L₁, L '₁, and And have L '₁<L₁, under two kinds of operating modes, at tunnel exit, pollutant levels are all considered by Tunnel Design concentration, and wind tower blowdown flow rate is all pressed 70% considers；

All can obtain by Tunnel Design concentration conditions according to exit pollutant levels: c₂=c '₂

Due to L '₁<L₁, so that Q '₂>Q₂, c '₁≤c₁

Two kinds of operating modes are calculated vertical shaft blowdown flow rate according to a respectively, then have:

$\begin{array}{c}\frac{(Q_1-Q_2)\&CenterDot;c_1}{\&lsqb;Q_1\&CenterDot;c_1+Q_2\&CenterDot;(c_2-c_1)\&rsqb;}=\frac{(Q_1^{\&prime;}-Q_2^{\&prime;})\&CenterDot;c_1^{\&prime;}}{\&lsqb;Q_1^{\&prime;}\&CenterDot;c_1^{\&prime;}+Q_1^{\&prime;}\&CenterDot;(c_2^{\&prime;}-c_1^{\&prime;})\&rsqb;}\\ \&DoubleRightArrow;\frac{Q_2}{Q_1-Q_2}\&CenterDot;\frac{c_2}{c_1}=\frac{Q_2^{\&prime;}}{Q_1^{\&prime;}-Q_2^{\&prime;}}\&CenterDot;\frac{c_2^{\&prime;}}{c_1^{\&prime;}}\end{array}$

As c '₁<c₁Time, abbreviation above formula can obtain:

$\begin{array}{c}\frac{Q_2^{\&prime;}}{Q_2}\&CenterDot;\frac{Q_1-Q_2}{Q_1^{\&prime;}-Q_2^{\&prime;}}<1\\ \&DoubleRightArrow;Q_1-Q_2<Q_1^{\&prime;}-Q_2^{\&prime;}\end{array}$

Visible: L₁The biggest, namely exhaust blower is the closer to tunnel exit, and vertical shaft air quantity is the least, the most energy-conservation.

As c '₁=c₁Time, abbreviation above formula can obtain:

$\begin{array}{c}\frac{Q_2^{\&prime;}}{Q_2}\&CenterDot;\frac{Q_1-Q_2}{Q_1^{\&prime;}-Q_2^{\&prime;}}=1\\ \&DoubleRightArrow;\frac{Q_1-Q_2}{Q_1^{\&prime;}-Q_2^{\&prime;}}=\frac{Q_2}{Q_2^{\&prime;}}<1\\ \&DoubleRightArrow;Q_1-Q_2<Q_1^{\&prime;}-Q_2^{\&prime;}\end{array}$

Visible: L₁The biggest, namely exhaust outlet is the closer to tunnel exit, and vertical shaft air quantity is the least, the most energy-conservation.By above-mentioned reason Opinion calculate it appeared that: in the case of identical wind tower filth-discharging effect, exhaust outlet is the closer to tunnel exit, and vertical shaft air quantity is the least, The most energy-conservation.

Above-mentioned calculating is that constant wagon flow considers by vehicle flowrate, owing in practical situation, wagon flow constantly changes, When outlet section does not has car to pass through, tunnel exit air-flow there will be short circuit, discharges from wind tower, and therefore, exhaust outlet should not be arranged on tunnel Road exports, and show that the installation site in separation panel air port is arranged at tunnel exit 100m-200m according to actual engineering experience Exhaust effect is optimal.

Interflow exhaust outlet 6 is arranged on 15%～20% position that the distance between tunnel exit 3 is tunnel 1 total length, Being preferably provided at 18% position that the distance between tunnel exit 3 is tunnel total length, it uses confluent type ventilation shaft air draft Pattern discharges air draft, and this exhaust outlet is referred to as interflow exhaust outlet 6.

Concrete, confluent type ventilation shaft air-exhaust type is using tunnel traffic draft power as exhaust resistance, and tunnel internal contamination thing is equal Discharging from exhaust outlet, its blowdown flow rate is 100%.

Wherein, interflow exhaust outlet 6 specifically arranges the selection of position and is determined in the following way:

(1) known: tunnel information, vehicle flowrate, speed

(2) assume: being 1 section at tunnel portal section to exhaust outlet, exhaust outlet section to tunnel outlet section is 2 sections, and exhaust outlet arrives Exhaust chimney outlet is 3 sections

(3) design calculates: the determination of exhaust outlet position, interflow

Owing to the position of interflow exhaust outlet can affect pressure distribution and the exhaust outlet flow of both sides, air port, lead letter according to mathematics The character of number it is known that when collaborate exhaust outlet be placed in can make position that pressure at both sides balance time, the actual ventilation of both sides and Design required airflow is equal, and now exhaust outlet air quantity is minimum, and for the design required airflow of tunnel total length, ventilating system energy consumption is minimum, should Air port is optimal location.

(3.1), when not considering jet blower in tunnel, bottom ventilation shaft, the total head computational methods behind interflow are:

Total head=gravity-flow ventilation power+tunnel traffic draft power-tunnel ventilation resistance；

P=Δ p_g1+Δp_t1-Δp_r1=Δ p_g2+Δp_t2-Δp_r2；

(3.2) gravity-flow ventilation power Δ p_g1With Δ p_g2Computational methods be:

${\mathrm{\&Delta;p}}_{g1}=(1+{\mathrm{\&zeta;}}_e+{\mathrm{\&lambda;}}_r\&CenterDot;\frac{L_1}{D_r})\&CenterDot;\frac{\mathrm{\&rho;}}{2}\&CenterDot;v_n^2;$

${\mathrm{\&Delta;p}}_{g2}=-(1+{\mathrm{\&lambda;}}_r\&CenterDot;\frac{L_2}{D_r})\&CenterDot;\frac{\mathrm{\&rho;}}{2}\&CenterDot;v_n^2;$

In formula: ρ is atmospheric density；ζ_eFor tunnel portal and the coefficient of partial resistance of outlet；λ_rFor tunnel along resistance coefficient； L₁And L₂It is respectively tunnel, the blower fan left and right sides long；D_rFor tunnel cross-section equivalent diameter, D_r=4 A_r/C_r；A_rBreak for tunnel clearance Area；C_rFor tunnel cross-section girth；v_nDesirable 2-3m/s；For known tunnel, natural wind resistance and L₁And L₂Relevant.

(3.3) tunnel traffic draft power Δ p_t1With Δ p_t2Computational methods be:

${\mathrm{\&Delta;p}}_{t1}=\frac{A_m}{A_r}\&CenterDot;\frac{\mathrm{\&rho;}}{2}\&CenterDot;\&lsqb;n_{+1}\&CenterDot;{(v_t-v_1)}^2\&rsqb;;$

${\mathrm{\&Delta;p}}_{t2}=-\frac{A_m}{A_r}\&CenterDot;\frac{\mathrm{\&rho;}}{2}\&CenterDot;\&lsqb;n_{-2}\&CenterDot;{(v_t+v_2)}^2\&rsqb;;$

In formula: A_mFor automobile equiva lent impedance area；v₁And v₂It is respectively the left and right sides, tunnel ventilation wind speed；n₊₁Enter for tunnel In mouthful section and v₁Vehicle number in the same direction, n₊₁=N L₁/3600/v_t；v_tFor each operating mode speed；N is tunnel hourly traffic volume；n_-2For Interior and v on the left of tunnel₂Reverse vehicle number, n_-2=N L₂/3600/v_t；For known tunnel, the most fixed in speed and vehicle flowrate In the case of, ventilation by trattic power and v₁And v₂Relevant, in order to make exhaust outlet air quantity minimum, inducer and outlet section ventilation are equal to Design required airflow, and required airflow is relevant, in road gradient in highway tunnel, traffic with road gradient in highway tunnel, length, the volume of traffic, speed, geographical position etc. In the case of amount, speed etc. are known, required airflow is the most relevant with length, therefore v₁And v₂The most relevant with length, and then ventilation by trattic power Only with length L₁And L₂Relevant.

(3.4) tunnel ventilation resistance Δ p_r1With Δ p_r2Computational methods be:

In formula:WithIt is respectively the loss coefficient of the left and right sides on the basis of wind speed in ventilation shaft；v₃It is logical Section mean wind speed in ventilating shaft；According to v₁And v₂And air quantity conserva-tion principle, v can be extrapolated₃, then flowing resistance and L₁ And L₂Relevant.

(3.5) formula in (3.2), (3.3), (3.4) is substituted in (3.1) equation, through abbreviation, L can be obtained₁With L₂A linear equation in two unknowns, and then L can be obtained₁And L₂Relativeness, obtain the position of optimum exhaust outlet.

(4) result of calculation: in the case of known to tunnel vehicle flowrate and speed, the optimal location of interflow exhaust outlet can root Go up result of calculation according to this to obtain.According to tunnel prognosis traffic volume and road speed, it is calculated the air draft under every kind of different operating modes Mouth position, in conjunction with the time-sharing ratio example under different rows vehicle speed, from the point of view of round-the-clock energy saving of system is runed, can be true Surely the optimum installation site of exhaust outlet is collaborated.According to the results of calculation of multiple typical projects, optimum is arranged by this utility model Air port be arranged on tunnel exit at distance equal to tunnel total length 15%-20% in the range of.

Further, separation panel air port 5 is all connected with tunnel 1 with one end of interflow exhaust outlet 6, will by exhaust outlet with this Exhaust emission in tunnel sucks in dynamic air exhausting device, the other end of separation panel air port 5 and interflow exhaust outlet 6 all with get in touch with Air channel 7 is connected, and this contact air channel 7 is connected with air draft machine room 4, and this air draft machine room 4 is provided with exhaust chimney 8, thus through exhaust outlet The waste gas entering air exhausting device enters in air draft machine room 4 through contact air channel 7, then discharges tunnel through exhaust chimney 8.

Concrete, contact air channel 7 for separation panel air port 5 and interflow exhaust outlet 6 being integrated in air draft machine room 4, two groups Exhaust outlet only needs a set of air draft machine room, reduces installation cost, simplifies apparatus structure.

This utility model, for any one traffic operating mode, can carry out energy-conservation judgement, selects air draft pattern and closes with opening Suitable exhaust outlet, it is achieved the energy-saving run of device, the following logic of process Main Basis wherein run is carried out: according to shunting and conjunction The position of exhaust outlet under stream mode, determines exhaust chimney air quantity and blower fan resistance, and carries out energy-conservation judgement, selects to use shunting discharge Or interflow discharge mode carries out air draft, determine the open position of concrete exhaust outlet.Concrete, after air exhausting device is installed, its shunting Exhaust outlet is the most fixed with the position of interflow exhaust outlet, determines shunting and exhaust chimney air quantity under the pattern of interflow and blower fan resistance according to this position Power, calculates ventilating system energy consumption under both of which, and the less pattern of energy consumption is as the air draft pattern of system.

Correlation computations according to multiple engineerings through repeatedly verifying, finds that air draft pattern is the most relevant with speed, works as car It is the most energy-conservation that speed uses separation panel mode playback to carry out air draft more than or equal to (normally referred to as normal row turner condition) during 40km/h, when It is the most energy-conservation that speed uses interflow discharge mode to carry out air draft less than (normally referred to as blocking operating mode) during 40km/h, therefore this reality I.e. may select corresponding air draft pattern with novel according to the road speed in tunnel, open corresponding exhaust outlet.

The concrete operations mode of air exhausting device dynamic to tunnel ventilation of the present utility model is described in detail below.

For a concrete tunnel, first, determine that the shunting discharge of optimum and the vent of interflow discharge mode are arranged Position, to separation panel mode playback and the interflow exhaust blower air quantity of discharge mode both of which, total head and ventilating system operation energy consumption Calculate, the air draft pattern that pattern is system employing that operation energy consumption is minimum, and then determine unlatching separation panel air port or unlatching Interflow exhaust outlet.During practical operation, determine suitable exhaust outlet according to the average speed in tunnel, when the average speed in tunnel During more than or equal to 40km/h, open separation panel air port to use separation panel mode playback to carry out air draft, when the speed in tunnel is less than During 40km/h, open interflow exhaust outlet to use interflow discharge mode to carry out air draft.

This utility model achieves the dynamic air draft of vcehicular tunnel operation ventilation, can be corresponding according to tunnel difference operation operating mode Open corresponding exhaust outlet, during normal row turner condition, close closed jet exhaust outlet, open separation panel air port, when blocking driving operating mode, Close separation panel air port, open interflow exhaust outlet, under same Management plan, more more energy efficient than tradition ventilation mode, fractional energy savings Up to 5%～10%.

As it will be easily appreciated by one skilled in the art that and the foregoing is only preferred embodiment of the present utility model, not In order to limit this utility model, all any amendment, equivalents made within spirit of the present utility model and principle and changing Enter, within should be included in protection domain of the present utility model.

Claims (7)

1. the dynamic air exhausting device of tunnel ventilation, it is characterised in that this device includes the separation panel air port (5) being located in tunnel With interflow exhaust outlet (6), described separation panel air port (5) is arranged on 100m～the 200m position of distance tunnel exit, described conjunction Stream exhaust outlet (6) is arranged on 15%～20% position that the distance with tunnel exit is tunnel total length；Described separation panel air port (5) one end with interflow exhaust outlet (6) is all connected with tunnel (1), and the other end is all by contact air channel (7) and air draft machine room (4) And exhaust chimney (8) is connected.

2. the dynamic air exhausting device of tunnel ventilation as claimed in claim 1, it is characterised in that described separation panel air port (5) is arranged 150m position at distance tunnel exit.

3. the dynamic air exhausting device of tunnel ventilation as claimed in claim 2, it is characterised in that described interflow exhaust outlet (6) is arranged With tunnel exit distance be tunnel total length 18% position.

4. the dynamic air exhausting device of tunnel ventilation as claimed in claim 3, it is characterised in that described separation panel air port (5) uses Bypass type ventilation shaft air draft pattern carries out air draft, and its blowdown flow rate is not less than 70%；Described interflow exhaust outlet (6) uses confluent type to lead to Ventilating shaft air draft pattern carries out air draft, and its blowdown flow rate is 100%.

5. the dynamic air exhausting device of tunnel ventilation as claimed in claim 4, it is characterised in that described bypass type ventilation shaft air draft mould Formula particularly as follows: using tunnel traffic draft power as air draft power, a tunnel internal contamination thing part is discharged from exhaust outlet, a part from Tunnel exit is discharged.

6. the dynamic air exhausting device of tunnel ventilation as claimed in claim 5, it is characterised in that described confluent type ventilation shaft air draft mould Formula is particularly as follows: using tunnel traffic draft power as exhaust resistance, internal contamination thing in tunnel is all discharged from exhaust outlet.

7. the dynamic air exhausting device of tunnel ventilation as claimed in claim 6, it is characterised in that when the average speed in tunnel is more than During equal to 40km/h, open separation panel air port and carry out air draft with employing separation panel mode playback, when the speed in tunnel is less than 40km/ During h, open interflow exhaust outlet to use interflow discharge mode to carry out air draft.