CN105715290A - Method for arranging fan in highway tunnel with ramp at entrance and exit - Google Patents

Abstract

The invention discloses a method for arranging a fan in the highway tunnel with a ramp at the entrance and exit.The highway tunnel comprises an entrance ramp section, n-1 middle sections which are arranged sequentially and an exit ramp section, the entrance ramp section comprises an entrance main street and an entrance ramp at an included angle of beta with the entrance main street, and the exit ramp section comprises an exit main street and an exit ramp at an included angle of alpha with the exit main street; a vertical shaft is arranged at the juncture of every two adjacent middle sections, and the vertical shafts and the middle sections are numbered according to the sequence from the entrance to the exit of the highway tunnel; CO concentration detection devices are arranged on the entrance main street, the entrance ramp, all the middle sections, the exit ramp and the exit main street.The method for arranging the fan in the highway tunnel with the ramp at the entrance and exit has the advantages that the calculation speed and the calculation accuracy are high, and the construction cost is effectively saved.

Description

There is the vcehicular tunnel blower fan method to set up of ring road gateway

Technical field

The present invention relates to vcehicular tunnel operation ventilating system technical field, especially relate to one Calculate that speed is fast, computational accuracy is high, there is the highway of ring road the gateway of effective saving construction cost Tunnel blower method to set up.

Background technology

Highway tunnel ventilation has gravity-flow ventilation and force ventilation two class.If tunnel is in short-term, waste gas Can utilize traffic Piston Action Wind Self-discharged, can use gravity-flow ventilation, generally bi-directional traffic tunnel is long During degree (m) × design traffic volume (/h) ＜ 6 × 105, and one-way traffic length of tunnel (m) During × design traffic volume (/h) ＜ 2 × 106, can use gravity-flow ventilation, other situation is suitable Use force ventilation.Force ventilation uses blower fan to force to discharge by waste gas in tunnel, its ventilation side Formula is classified at present to be had: longitudinal ventilation, semi-transverse ventilation, transversal ventilation three major types and this three Plant the combined ventilating mode on the basis of basic mode.

In axial flow blower on the vertical shaft of common vcehicular tunnel and tunnel, jet blower is arranged The calculating process of quantity and running parameter is the most extremely complex, needs to spend a large amount of and computational costs, Cause the increase of construction cost.

Summary of the invention

The goal of the invention of the present invention is to overcome selected axial flow blower and air-supply in prior art It is long that axial flow blower calculates the cycle, calculates cost high, the deficiency that construction cost is high, it is provided that a kind of Calculate that speed is fast, computational accuracy is high, there is the highway of ring road the gateway of effective saving construction cost Tunnel blower method to set up.

To achieve these goals, the present invention is by the following technical solutions:

There is the vcehicular tunnel blower fan method to set up of ring road a kind of gateway, and described vcehicular tunnel includes Entrance ramp section, n-1 the interlude being arranged in order and exit ramp section, Entrance ramp section bag Including entrance major trunk roads and be the Entrance ramp of β with entrance major trunk roads angle, exit ramp section includes Outlet major trunk roads and with outlet major trunk roads angle be the exit ramp of α；Every pair of adjacent interlude is handed over A vertical shaft, each vertical shaft and each interlude it is equipped with all according to from road tunnel entrance at boundary Order number consecutively to outlet；At entrance major trunk roads, Entrance ramp, each interlude, go out It is respectively provided with CO concentration detection apparatus on mouth ring road, outlet major trunk roads；Comprise the steps:

(1-1) being provided with entrance major trunk roads basal area in computer is A_r1, air pressure is p₁； Entrance ramp basal area is A_b1, air pressure is p_1zd；Entrance major trunk roads and Entrance ramp converge The basal area at place is A_r2, air pressure is p₂；Outlet major trunk roads basal area is A_r(n+1), empty Atmospheric pressure is p_(n+1)；The basal area of outlet major trunk roads and exit ramp crotch is A_rn, pressure For p_n；The basal area of exit ramp is A_en, air pressure is p_2zd；The air of entrance major trunk roads Flow Q_r1, entrance major trunk roads and air mass flow Q of Entrance ramp meet_r2, Entrance ramp Air mass flow Q_b1；Outlet major trunk roads and air mass flow Q of exit ramp crotch_rn, export circle Air mass flow Q in road_en, air mass flow Q of outlet major trunk roads_r(n+1)；

(1-1-1) first equation of momentum is set up:

A_r1p₁+A_b1p_1zdcosβ-A_r2p₂=ρ Q_r2v_r2-ρK_b1Q_b1v_b1cosβ-ρQ_r1v_r1,

Wherein, ρ is atmospheric density coefficient, K_b1For sending of Entrance ramp and entrance major trunk roads junction Air port boosting momentum coefficient；

Computer utilizes formula

Calculate the air velocity v of entrance major trunk roads_r1, entrance trunk The air velocity v of road and Entrance ramp meet_r2, the air velocity v of Entrance ramp_b1；

Computer makes p_1zd=p₁, by v_r1、v_r2And v_b1Substitute into first equation of momentum, obtain after arrangement Entrance ramp section blast pressure increment Delta p_b1:

$\begin{array}{c}{\mathrm{\Δp}}_{b1}=p_2-p_1\\ =2\frac{A_{r2}}{A_{r1}}\frac{Q_{b1}}{Q_{r2}}\[\frac{Q_{b1}}{Q_{r2}}+(1-\frac{A_{r1}}{A_{r2}})\frac{Q_{r2}}{Q_{h1}}+\frac{A_{r1}}{A_{r2}}\frac{K_{b1}{v}_{b1}}{v_{r2}}\cos \mathrm{\β}-2\]\·\frac{\mathrm{\ρ}}{2}{v}_{r2}^2\end{array};$

(1-1-2) second equation of momentum is set up

A_rnp_n-A_enp_2zdcosα-A_r(n+1)p_(n+1)=ρ Q_r(n+1)v_r(n+1)+ρK_enQ_env_encosα-ρQ_rnv_rn；

Wherein, K_enExhaust outlet boosting momentum coefficient it is connected with major trunk roads for exit ramp；

Computer utilizes formula

Calculate outlet major trunk roads and exit ramp crotch is empty Gas velocity v_rn, exit ramp air velocity v_en, the air velocity v of outlet major trunk roads_n(n+1)；

Computer makes p_2zd=p_(n+1), by v_r1、v_r2And v_b1Substitute into second equation of momentum, after arrangement Air draft pressure increase Δ p to exit ramp section_en:

$\begin{array}{c}{\mathrm{\Δp}}_{en}=p_{(n+1)}-p_n\\ =2\frac{A_{rn}}{A_{r(n+1)}}\frac{Q_{en}}{Q_{rn}}\[2-\frac{Q_{en}}{Q_{rn}}-(1-\frac{A_{r(n+1)}}{A_{rn}})\frac{Q_{rn}}{Q_{en}}-\frac{A_{r(n+1)}}{A_{rn}}\frac{K_{en}{v}_{en}}{v_{rn}}\cos \mathrm{\α}\]\·\frac{\mathrm{\ρ}}{2}{v}_{rn}^2\end{array};$

(1-1-3) computer settings

$v_{r(i+1)}=\frac{Q_{r(i+1)}}{A_{r(i+1)}},{\mathrm{\Δp}}_{ei}=2\frac{Q_{ei}}{Q_{ri}}\[(2-\frac{K_{ei}\·v_{ei}}{v_{ri}})-\frac{Q_{ei}}{Q_{ri}}\]\·\frac{\mathrm{\ρ}}{2}\·v_{ri}^2,$

${\mathrm{\Δp}}_{bi}=2\frac{Q_{bi}}{Q_{r(i+1)}}\[(\frac{K_{bi}{v}_{bi}{\mathrm{cos\β}}_i}{v_{r(i+1)}}-2)+\frac{Q_{bi}}{Q_{r(i+1)}}\]\frac{\mathrm{\ρ}}{2}{v}_{r(i+1)}^2,$ Q_r(i+1)=Q_ri-Q_ei+Q_bi；

Wherein, Δ p_eiExhaust outlet for i-th vertical shaft rises pressure, Δ p_biAir-supply for i-th vertical shaft Mouth rises pressure, i=1 ..., n-2；

Q_riFor the air mass flow of i-th vertical shaft, A_riFor the major trunk roads basal area of i-th interlude, v_riFor the air velocity of i-th interlude, v_r(i+1)For the air velocity of i+1 interlude, A_r(i+1)For the basal area of i+1 interlude, Δ p_eiExhaust outlet for i-th vertical shaft rises pressure, Q_eiFor the exhaust outlet exhaust air rate of i-th vertical shaft, Q_riFor the air mass flow of i-th interlude, K_ei For the exhaust outlet boosting momentum coefficient of i-th vertical shaft, v_eiExhaust outlet air for i-th vertical shaft Flow velocity, Q_biFor the air outlet air output of i-th vertical shaft, Q_r(i+1)Sky for i+1 interlude Throughput, K_biFor the air outlet boosting momentum coefficient of i-th vertical shaft, v_biFor i-th vertical shaft Air outlet air velocity, β_iAir-supply passage and the angle at vcehicular tunnel top for i-th vertical shaft；

$C_1=\frac{Q_{req1}}{Q_{r1}},C_{i+1}=\frac{(Q_{ri}-Q_{ei})\·C_i+Q_{req(i+1)}+Q_{bi}\·C_{bi}}{Q_{r(i+1)}},$

Wherein, C₁It is the air concentration ratio of the 1st silo bottom, C_iFor i-th silo bottom Air concentration ratio, C_i+1For the air concentration ratio of i+1 silo bottom, Q_req1For entrance trunk The required airflow in road, Q_req1It is directly proportional to the CO concentration of entrance major trunk roads detection, Q_req(i+1)It is The required airflow of i+1 interlude, Q_req(i+1)Just become with the CO concentration of i+1 interlude detection Ratio, C_biAir-supply concentration ratio for i-th vertical shaft；

Wherein, C_b1Air for Entrance ramp Concentration ratio, Q_req1zdFor the required airflow of Entrance ramp, Q_req1zdDense with the CO of Entrance ramp detection Degree is directly proportional, C_(n-2)It is the air concentration ratio of the n-th-2 silo bottoms, Q_req2zdFor outlet circle The required airflow in road, Q_req2zdIt is directly proportional to the CO concentration of exit ramp detection, C_2zdExit ramp Air concentration ratio；

Q_bi·(1-C_bi)=Q_req(i+1)-(Q_ri-Q_ei)·(1-C_i)；

(1-2) initial value of the air output of computer calculating entrance tunnels sectionAnd entrance tunnels section Air quantity initial value

$Q_{b0}^0=Q_{r1}^0=\underset{j=1}{\overset{m+1}{\Σ}}{Q}_{reqj}-\underset{j=1}{\overset{m}{\Σ}}{Q}_{bj}\·(1-C_{bj})$

M represents that between Entrance ramp section and first air output vertical shaft undetermined, air output has determined vertical shaft Number；

Q_reqiRequired airflow for jth interlude；

Q_bjAir output for jth vertical shaft；

C_bjAir-supply concentration ratio for jth vertical shaft；

Judge the sky of all silo bottoms in the vertical shaft that Entrance ramp section is undetermined with first air output Gas concentration, than C value, if having the air concentration of any one silo bottom than C ＞ 1, is then continuously increased The air output of Entrance ramp section, until the air concentration of all of silo bottom more equal than C≤1 Time obtain Q_b0, make Q_r1=Q_b0；

As m ＞ 0, the Q of calculating the 2nd to m+1 interlude_rAnd v_r, wherein Q_rUtilize recursion Formula Q_r(j+1)=Q_rj-Q_ej+Q_bjObtain；

When judging C:

Serial number is the air concentration ratio of the silo bottom of 1

The air concentration ratio of the silo bottom of serial number ＞ 1, uses equation below to solve:

$C_{i+1}=\frac{(Q_{ri}-Q_{ei})\·C_i+Q_{req(i+1)}+Q_{bi}\·C_{bi}}{Q_{r(i+1)}};$

(1-3) computer calculates the air output initial value of next air output vertical shaft undeterminedIf working as The serial number of front air output vertical shaft undetermined is i, then:

$Q_{bi}^0=\underset{j=i+1}{\overset{m^{\′}+i+1}{\Σ}}{Q}_{reqj}-Q_{sfi}-\underset{j=i+1}{\overset{m^{\′}+i}{\Σ}}{Q}_{bj}\·(1-C_{bj})$

Wherein, Q_reqjFor the required airflow of jth interlude, Q_sfiFor i-th silo bottom air-flow In equivalent amount of fresh air, Q_bjFor the air output of jth vertical shaft, C_bjFor jth vertical shaft Air-supply concentration ratio, m ' represents that current air output vertical shaft undetermined and the first air output in its front are undetermined perpendicular Between well, air output has determined the number of vertical shaft；

Judge that current air output vertical shaft undetermined front is to all perpendicular in first air output vertical shaft undetermined The air concentration of bottom is than C value, if having the air concentration of any one silo bottom than C ＞ 1, Then it is continuously increased the air output of current air output vertical shaft undetermined, until the sky of all of silo bottom Gas concentration is more equal than C≤1 time obtain Q_bi；

Calculate i+1 to the Q of+1 interlude of i+m '_rAnd v_r；

Judge to use formula during CSolve；

(1-4) computer circulation step (1-3), until obtaining from Entrance ramp section to outlet circle The air output Q of all vertical shafts of road section_b, Entrance ramp section, exit ramp section and all interludes Q_rAnd v_r；

(1-5) computer calculates Entrance ramp section, exit ramp section and the pressure of all interludes Δp_iAnd required jet blower number of units J_i；

(1-6) determine in each vertical shaft jet blower parameter in axial flow blower parameter and tunnel, return Return step (1-1), replace the blower fan ginseng preset in step (1-1) with the fan parameter obtained Number；

(1-7) computer circulation step (1-1) to (1-6) until determine Entrance ramp section, Exit ramp section and the rational axial flow blower of all interludes and jet blower parameter, install axial flow Blower fan and jet blower.

When determining rational axial flow blower and jet blower parameter, examine from safety and economy Considering, rational factor mainly has: for the air-supply of each vertical shaft, chosen axis flow fan air output Q_bIt is not less than and close proximity to the air output Q of this vertical shaft obtained according to step (1-4)_b；Right In the air draft of each vertical shaft, chosen axis flow fan exhaust air rate Q_e；First each tunnel section is made Meet design wind speed v_r≤ 10 meter per seconds, choose the axial flow blower of bigger exhaust air rate and can reduce and penetrate Flow fan installs number of units, but the upper limit is not cause air return at silo bottom；Jet in tunnel Blower fan number of units is wanted to be mounted so as to down.Additionally can be in terms of cost, operation and maintenance cost etc. Consider the selection installed air draft axial flow blower and install between multiple stage jet blower.Consider Factor also just like volume of traffic change, normal traffic and retardance traffic, one-way traffic and two-way friendship The situations such as logical, fire smoke evacuation need axial flow blower type to be mounted and quantity at different years, penetrate The type of flow fan and quantity, and the service life etc. of blower fan.

The present invention measures entrance major trunk roads, entrance circle first with each CO concentration detection apparatus Road, each interlude, exit ramp and the required airflow of outlet major trunk roads, then set entrance master Arterial highway, Entrance ramp, each interlude, exit ramp, outlet major trunk roads and each vertical shaft Other parameter, the inventive method sending (row) air quantity and sending (row) wind speed to have level according to blower fan The feature of shelves, by the tunnel each section Design Theory air quantity solving output and the theoretical air-supply of vertical shaft Amount (data) is as reference, and calculate and select axial flow blower send (row) air quantity.

The present invention is by setting up air output vertical shaft undetermined mark and Look-ahead air output undetermined perpendicular Well mark, makes calculating can process the given of vertical shaft air output and two kinds of situations undetermined simultaneously.This In bright method, each for tunnel section required airflow is calculated the most single-row, can be follow-up multiple calculating Carry out simplifying and avoiding double counting；Setting vertical shaft and blower fan etc. has related parameter can improve calculating behaviour The motility made；Later calculate this air output initial valueThe effective range that search calculates can be reduced With the shortening calculating time；Calculate tunnel each section pressure Δ p_iAnd required jet blower number of units J_iFor Output result reasonableness check provides foundation；Air output, exhaust air rate is given by axial flow blower level shelves Being manpower intervention, its operation is still setting vertical shaft and blower fan etc. related parameter.

The present invention solves the survey calculation problem of the arbitrarily longitudinal ventilation that a vertical shaft is arranged, will be complete Jet blower longitudinal ventilation, vertical shaft longitudinal pressure-suction ventilation and vertical shaft are with jet blower combination longitudinally Ventilation these three is commonly used the ventilation calculating of draft type and is classified as one.It is i.e. 0 when vertical shaft number Time, calculate for full jet blower longitudinal ventilation；When vertical shaft number is more than 0, it is not required to configuration and penetrates It is that vertical shaft longitudinal pressure-suction ventilation calculates during flow fan, is vertical shaft when need to configure jet blower and penetrate Flow fan combination longitudinal ventilation calculates.

As preferably, the pressure Δ p of described step (1-5)_iEquation below is utilized to be calculated: Δp_i=Δ p_ri-Δp_ti+Δp_mi；

Meanwhile, at the junction of Entrance ramp Yu entrance major trunk roads, Ying You

Δp₁=Δ p_1zd

Wherein, Δ p₁=Δ p_t1-Δp_r1-Δp_m1+∑Δp_j1,

Δp_1zd=Δ p_t1zd-Δp_r1zd-Δp_m1zd+∑Δp_j1zd；

At the junction of exit ramp with outlet major trunk roads, Ying You

Δp_(n+1)=Δ p_2zd,

Wherein, Δ p_(n+1)=Δ p_t(n+1)-Δp_r(n+1)-Δp_m(n+1)+∑Δp_j(n+1),

Δp_2zd=Δ pt_2zd-Δp_r2zd-Δp_m2zd+∑Δp_j2zd；

Wherein, Δ p_riFor i-th interlude and v_rRelevant ventilation resistance, Δ p_tiIn the middle of i-th Section and v_rRelevant ventilation by trattic power, Δ p_miFor the natural wind resistance of i-th interlude, ∑ Δ p_j1zdPressure, ∑ Δ is always risen for jet blower group in Entrance ramp_pj1In being the 1st section major trunk roads Jet blower group always rises pressure, ∑ Δ p_j(n+1)Pressure is always risen for outlet major trunk roads jet blower group, ∑Δp_j2zdPressure, Δ pt is always risen for jet blower group in exit ramp_2zdFriendship for exit ramp Wind-force all, Δ p_r2zdFor the ventilation resistance of exit ramp, Δ p_m2zdFor exit ramp from So wind resistance, Δ p_t1zdFor the ventilation by trattic power of Entrance ramp, Δ p_r1zdLeading to for Entrance ramp Windage drag, Δ p_m1zdNatural wind resistance for Entrance ramp.

As preferably, jet blower number of units J of described step (1-5)_iCalculated by following two formulas:

${\mathrm{\Δp}}_{ki}=\mathrm{\ρ}\·v_{ki}^2\·\frac{A_{ki}}{A_{ri}}\·(1-\frac{v_{ri}}{v_{ki}})\·{\mathrm{\η}}_i$

Wherein: ${\mathrm{\Δp}}_{ei}=2\frac{Q_{ei}}{Q_{\stackrel{\·}{n}}}\[(2-\frac{K_{ei}\·v_{ei}}{v_{ri}})-\frac{Q_{ei}}{Q_{ri}}\]\·\frac{\mathrm{\ρ}}{2}\·v_{ri}^2,$

${\mathrm{\Δp}}_{bi}=2\frac{Q_{bi}}{Q_{r(i+1)}}\[(\frac{K_{bi}{v}_{bi}{\mathrm{cos\β}}_i}{v_{r(i+1)}}-2)+\frac{Q_{bi}}{Q_{r(i+1)}}\]\frac{\mathrm{\ρ}}{2}{v}_{r(i+1)}^2$

Δp_kiEvery jet blower for i-th interlude rises pressure, v_kiIn the middle of i-th The air outlet velocity of the jet blower of section, A_kiExit face for the jet blower of i-th interlude Long-pending, Δ p_si、v_si、A_siIn subscript k only represent jet blower, i represents this blower fan place Interlude serial number, η_iJet blower position friction loss reduction system for i-th interlude Number.

As preferably,

Q_ei/Q_ri≤ 1.0, Q_bi/Q_r(i+1)≤ 1.0,0.9≤C_i≤ 1.0,0≤C_1zd≤ 1.0,0.5≤C_2zd≤1.0。

As preferably, CO concentration detection apparatus include MQ-2 sensor, MQ-135 sensor, CO sensor and microprocessor, microprocessor senses with MQ-2 sensor, MQ-135 respectively Device, CO sensor and computer electrical connection；

Also comprise the steps:

MQ-2 sensor, MQ-135 sensor and CO sensor detected gas signal, micro-place Reason device receives detection signal S1 (t) of CO sensor, detection signal S2 (t) of MQ-2 sensor, Detection signal S3 (t) of MQ-135 sensor；

Microprocessor utilizes formula

Signal (t)=S1²(t)+(S1(t)-S2(t))²+(S1(t)-S3(t))²Calculate To gas detection signals signal (t) removed after disturbing, microprocessor calculates and obtains signal (t) Meansigma methods signal in time T, computer utilizes formula signal × SS calculate and entered Mouth major trunk roads, Entrance ramp, each interlude, exit ramp, the required airflow of outlet major trunk roads； Wherein, SS is the required airflow conversion coefficient set.

Owing to sensor is respectively provided with cross sensitivity to detected object gas, therefore this Bright employing MQ-2 sensor and MQ-135 sensor are as aiding sensors, CO sensor As detection CO gas master reference, by MQ-2 sensor, MQ-135 sensor and The signal of CO sensor detection merges, and has obtained sensor and has merged signal signal (t), Thus both remained the detection information of master reference, remain again master reference and aiding sensors Between signal difference information, improve accuracy of detection.

Therefore, there is advantages that calculating speed is fast, computational accuracy is high, has Effect saves construction cost.

Accompanying drawing explanation

Fig. 1 is a kind of sectional view of the Entrance ramp section of the present invention；

Fig. 2 is a kind of sectional view of the exit ramp section of the present invention；

Fig. 3 is vertical shaft and a kind of sectional view of vcehicular tunnel of the present invention；

Fig. 4 is a kind of flow chart of embodiments of the invention.

In figure: Entrance ramp section 1, interlude 2, exit ramp section 3, vertical shaft 4, highway tunnel Road 5, entrance major trunk roads 11, Entrance ramp 12, outlet major trunk roads 31, exit ramp 32.

Detailed description of the invention

The present invention will be further described with detailed description of the invention below in conjunction with the accompanying drawings.

Embodiment as shown in Figure 1, Figure 2, Figure 3 shows is the vcehicular tunnel that there is ring road a kind of gateway Blower fan method to set up, during vcehicular tunnel 5 includes that Entrance ramp section 1, n-1 are arranged in order Between section 2 and exit ramp section 3, Entrance ramp section include entrance major trunk roads 11 and with entrance master Arterial highway angle is the Entrance ramp 12 of β, exit ramp section include export major trunk roads 31 and with go out Mouth major trunk roads angle is the exit ramp 32 of α；Every pair of adjacent interlude intersection is equipped with one Vertical shaft 4, each vertical shaft and each interlude all according to from road tunnel entrance to outlet order Number consecutively；In entrance major trunk roads, Entrance ramp, each interlude, exit ramp, outlet CO concentration detection apparatus it is respectively provided with on major trunk roads；

CO concentration detection apparatus includes MQ-2 sensor, MQ-135 sensor, CO sensor And microprocessor, microprocessor passes with MQ-2 sensor, MQ-135 sensor, CO respectively Sensor and computer electrical connection；

As shown in Figure 4, comprise the steps:

Step 100, required airflow detects

MQ-2 sensor, MQ-135 sensor and CO sensor detected gas signal, micro-place Reason device receives detection signal S1 (t) of CO sensor, detection signal S2 (t) of MQ-2 sensor, Detection signal S3 (t) of MQ-135 sensor；

Microprocessor utilizes formula

Signal (t)=S1²(t)+(S1(t)-S2(t))²+(S1(t)-S3(t))²It is calculated Removing gas detection signals signal (t) after interference, microprocessor calculates and obtains signal (t) and exists Meansigma methods signal in time T, computer utilizes formula signal × SS calculate and obtain entrance Major trunk roads, Entrance ramp, each interlude, exit ramp, the required airflow of outlet major trunk roads； Wherein, SS is the required airflow conversion coefficient set.

Step 200, parameter is arranged

Being provided with entrance major trunk roads basal area in computer is A_r1, air pressure is p₁；Entrance circle Road basal area is A_b1, air pressure is p_1zd；Entrance major trunk roads and Entrance ramp meet disconnected Area is A_r2, air pressure is p₂；Outlet major trunk roads basal area is A_r(n+1), air pressure For p_(n+1)；The basal area of outlet major trunk roads and exit ramp crotch is A_rn, pressure is p_n； The basal area of exit ramp is A_en, air pressure is p_2zd；The air mass flow of entrance major trunk roads Q_r1, entrance major trunk roads and air mass flow Q of Entrance ramp meet_r2, the air of Entrance ramp Flow Q_b1；Outlet major trunk roads and air mass flow Q of exit ramp crotch_rn, exit ramp Air mass flow Q_en, air mass flow Q of outlet major trunk roads_r(n+1)；

Step 210, computer sets up first equation of momentum:

A_r1p₁+A_b1p_1zdcosβ-A_r2p₂=ρ Q_r2v_r2-ρK_b1Q_b1v_b1cosβ-ρQ_r1v_r1,

Wherein, ρ is atmospheric density coefficient, K_b1For sending of Entrance ramp and entrance major trunk roads junction Air port boosting momentum coefficient；

Computer utilizes formula

Calculate the air velocity v of entrance major trunk roads_r1, entrance trunk The air velocity v of road and Entrance ramp meet_r2, the air velocity v of Entrance ramp_b1；

Make p_1zd=p₁, by v_r1、v_r2And v_b1Substitute into first equation of momentum, after arrangement, obtain entrance circle Road section blast pressure increment Delta p_b1:

$\begin{array}{c}{\mathrm{\Δp}}_{b1}=p_2-p_1\\ =2\frac{A_{r2}}{A_{r1}}\frac{Q_{b1}}{Q_{r2}}\[\frac{Q_{b1}}{Q_{r2}}+(1-\frac{A_{r1}}{A_{r2}})\frac{Q_{r2}}{Q_{b1}}+\frac{A_{r1}}{A_{r2}}\frac{K_{b1}{v}_{b1}}{v_{r2}}\cos \mathrm{\β}-2\]\·\frac{\mathrm{\ρ}}{2}{v}_{r2}^2\end{array};$

Step 220, second equation of momentum set up by computer

A_rnp_n-A_enp_2zdcosα-A_r(n+1)p_(n+1)=ρ Q_r(n+1)v_r(n+1)+ρK_enQ_env_encosα-ρQ_rnv_rn；

Wherein, K_enExhaust outlet boosting momentum coefficient it is connected with major trunk roads for exit ramp；

Computer utilizes formula

Calculate outlet major trunk roads and exit ramp crotch is empty Gas velocity v_rn, exit ramp air velocity v_en, the air velocity v of outlet major trunk roads_n(n+1)；

Make p_2zd=p_(n+1), by v_r1、v_r2And v_b1Substitute into second equation of momentum, exported after arrangement The air draft pressure increase Δ p of ring road section_en:

$\begin{array}{c}{\mathrm{\Δp}}_{en}=p_{(n+1)}-p_n\\ =2\frac{A_{rn}}{A_{r(n+1)}}\frac{Q_{en}}{Q_{rn}}\[2-\frac{Q_{en}}{Q_{rn}}-(1-\frac{A_{r(n+1)}}{A_{rn}})\frac{Q_{rn}}{Q_{en}}-\frac{A_{r(n+1)}}{A_{rn}}\frac{K_{en}{v}_{en}}{v_{rn}}\cos \mathrm{\α}\]\·\frac{\mathrm{\ρ}}{2}{v}_{rn}^2\end{array};$

Step 230, computer settings

$v_{r(i+1)}=\frac{Q_{r(i+1)}}{A_{r(i+1)}},{\mathrm{\Δp}}_{ei}=2\frac{Q_{ei}}{Q_{ri}}\[(2-\frac{K_{ei}\·v_{ei}}{v_{ri}})-\frac{Q_{ei}}{Q_{ri}}\]\·\frac{\mathrm{\ρ}}{2}\·v_{ri}^2,$

${\mathrm{\Δp}}_{bi}=2\frac{Q_{bi}}{Q_{r(i+1)}}\[(\frac{K_{bi}{v}_{bi}{\mathrm{cos\β}}_i}{v_{r(i+1)}}-2)+\frac{Q_{bi}}{Q_{r(i+1)}}\]\frac{\mathrm{\ρ}}{2}{v}_{r(i+1)}^2,$ Q_r(i+1)=Q_ri-Q_ei+Q_bi；

Wherein, Δ p_eiExhaust outlet for i-th vertical shaft rises pressure, Δ p_biAir-supply for i-th vertical shaft Mouth rises pressure, i=1 ..., n-2；

Q_riFor the air mass flow of i-th vertical shaft, A_riFor the major trunk roads basal area of i-th interlude, v_riFor the air velocity of i-th interlude, v_r(i+1)For the air velocity of i+1 interlude, A_r(i+1)For the basal area of i+1 interlude, Δ p_eiExhaust outlet for i-th vertical shaft rises pressure, Q_eiFor the exhaust outlet exhaust air rate of i-th vertical shaft, Q_riFor the air mass flow of i-th interlude, K_ei For the exhaust outlet boosting momentum coefficient of i-th vertical shaft, v_eiExhaust outlet air for i-th vertical shaft Flow velocity, Q_biFor the air outlet air output of i-th vertical shaft, Q_r(i+1)Sky for i+1 interlude Throughput, K_biFor the air outlet boosting momentum coefficient of i-th vertical shaft, v_biFor i-th vertical shaft Air outlet air velocity, β_iAir-supply passage and the angle at vcehicular tunnel top for i-th vertical shaft；

$C_1=\frac{Q_{req1}}{Q_{r1}},C_{i+1}=\frac{(Q_{ri}-Q_{ei})\·C_i+Q_{req(i+1)}+Q_{bi}\·C_{bi}}{Q_{r(i+1)}},$

Wherein, C₁It is the air concentration ratio of the 1st silo bottom, C_iFor i-th silo bottom Air concentration ratio, C_i+1For the air concentration ratio of i+1 silo bottom, Q_req1For entrance trunk The required airflow in road, Q_req1It is directly proportional to the CO concentration of entrance major trunk roads detection, Q_req(i+1)It is The required airflow of i+1 interlude, Q_req(i+1)Just become with the CO concentration of i+1 interlude detection Ratio, C_biAir-supply concentration ratio for i-th vertical shaft；

Wherein, C_b1Air for Entrance ramp Concentration ratio, Q_req1zdFor the required airflow of Entrance ramp, Q_req1zdDense with the CO of Entrance ramp detection Degree is directly proportional, C_(n-2)It is the air concentration ratio of the n-th-2 silo bottoms, Q_req2zdFor outlet circle The required airflow in road, Q_req2zdIt is directly proportional to the CO concentration of exit ramp detection, C_2zdExit ramp Air concentration ratio；

Q_bi·(1-C_bi)=Q_req(i+1)-(Q_ri-Q_ei)·(1-C_i)；

Step 300, for the first time calculation of air quantity

Computer calculates the initial value of the air output of entrance tunnels sectionAnd at the beginning of entrance tunnels section air quantity Value

$Q_{b0}^0=Q_{r1}^0=\underset{j=1}{\overset{m+1}{\Σ}}{Q}_{reqj}-\underset{j=1}{\overset{m}{\Σ}}{Q}_{bj}\·(1-C_{bj})$

M represents that between Entrance ramp section and first air output vertical shaft undetermined, air output has determined vertical shaft Number；

Q_reqjRequired airflow for jth interlude；

Q_bjAir output for jth vertical shaft；

C_bjAir-supply concentration ratio for jth vertical shaft；

Judge the sky of all silo bottoms in the vertical shaft that Entrance ramp section is undetermined with first air output Gas concentration, than C value, if having the air concentration of any one silo bottom than C ＞ 1, is then continuously increased The air output of Entrance ramp section, until the air concentration of all of silo bottom more equal than C≤1 Time obtain Q_b0, make Q_r1=Q_b0；

As m ＞ 0, the Q of calculating the 2nd to m+1 interlude_rAnd v_r, wherein Q_rUtilize recursion Formula Q_r(j+1)=Q_rj-Q_ej+Q_bjObtain；

When judging C:

Serial number is the air concentration ratio of the silo bottom of 1

The air concentration ratio of the silo bottom of serial number ＞ 1, uses equation below to solve:

$C_{i+1}=\frac{(Q_{ri}-Q_{ei})\·C_i+Q_{req(i+1)}+Q_{bi}\·C_{bi}}{Q_{r(i+1)}};$

Step 400, for the second time calculation of air quantity

Computer calculates the air output initial value of next air output vertical shaft undeterminedIf currently blowing The serial number measuring vertical shaft undetermined is i, then:

$Q_{bi}^0=\underset{j=i+1}{\overset{m^{\′}+i+1}{\Σ}}{Q}_{reqj}-Q_{sfi}-\underset{j=i+1}{\overset{m^{\′}+i}{\Σ}}{Q}_{bj}\·(1-C_{bj})$

Wherein, Q_reqjFor the required airflow of jth interlude, Q_sfiFor i-th silo bottom air-flow In equivalent amount of fresh air, Q_bjFor the air output of jth vertical shaft, C_bjFor jth vertical shaft Air-supply concentration ratio, m ' represents that current air output vertical shaft undetermined and the first air output in its front are undetermined perpendicular Between well, air output has determined the number of vertical shaft；

Judge that current air output vertical shaft undetermined front is to all perpendicular in first air output vertical shaft undetermined The air concentration of bottom is than C value, if having the air concentration of any one silo bottom than C ＞ 1, Then it is continuously increased the air output of current air output vertical shaft undetermined, until the sky of all of silo bottom Gas concentration is more equal than C≤1 time obtain Q_bi；

Calculate i+1 to the Q of+1 interlude of i+m '_rAnd v_r；

Judge to use formula during C $C_{i+1}=\frac{Q_{req(i+1)}+(Q_{ri}-Q_{ei})\·C_i+Q_{bi}\·C_{bi}}{Q_{r(i+1)}}$ Solve；

Step 500, it is thus achieved that the air output Q of vertical shaft_b, Entrance ramp section, exit ramp section and institute There is the Q of interlude_rAnd v_r

Computer circulation carries out step 400, until obtaining from Entrance ramp section to exit ramp section The air output Q of all vertical shafts_b, Entrance ramp section, exit ramp section and the Q of all interludes_rAnd v_r；

Step 600, calculates pressure Δ p_iAnd required jet blower number of units J_i

Computer calculates Entrance ramp section, exit ramp section and the pressure Δ p of all interludes_iAnd institute Need jet blower number of units J_i；

Δp_i=Δ p_ri-Δp_ti+Δp_mi；

Meanwhile, at the junction of Entrance ramp Yu entrance major trunk roads, Ying You

Δp₁=Δ p_1zd

Wherein, Δ p₁=Δ p_t1-Δp_r1-Δp_m1+∑Δp_j1,

Δp_1zd=Δ p_t1zd-Δp_r1zd-Δp_m1zd+∑Δp_j1zd；

At the junction of exit ramp with outlet major trunk roads, Ying You

Δp_(n+1)=Δ p_2zd,

Wherein, Δ p_(n+1)=Δ p_t(n+1)-Δp_r(n+1)-Δp_m(n+1)+∑Δp_j(n+1),

Δp_2zd=Δ pt_2zd-Δp_r2zd-Δp_m2zd+∑Δp_j2zd；

Wherein, Δ p_riFor i-th interlude and v_rRelevant ventilation resistance, Δ p_tiIn the middle of i-th Section and v_rRelevant ventilation by trattic power, Δ p_miFor the natural wind resistance of i-th interlude, ∑ Δ p_j1zdPressure, ∑ Δ is always risen for jet blower group in Entrance ramp_pj1In being the 1st section major trunk roads Jet blower group always rises pressure, ∑ Δ p_j(n+1)Pressure is always risen for outlet major trunk roads jet blower group, ∑Δp_j2zdPressure, Δ pt is always risen for jet blower group in exit ramp_2zdFriendship for exit ramp Wind-force all, Δ p_r2zdFor the ventilation resistance of exit ramp, Δ p_m2zdFor exit ramp from So wind resistance, Δ p_t1zdFor the ventilation by trattic power of Entrance ramp, Δ p_r1zdLeading to for Entrance ramp Windage drag, Δ p_m1zdNatural wind resistance for Entrance ramp.

Jet blower number of units J_iCalculated by following two formulas:

Wherein: ${\mathrm{\Δp}}_{ei}=2\frac{Q_{ei}}{Q_{ri}}\[(2-\frac{K_{ei}\·v_{ei}}{v_{ri}})-\frac{Q_{ei}}{Q_{ri}}\]\·\frac{\mathrm{\ρ}}{2}\·v_{ri}^2,$

${\mathrm{\Δp}}_{bi}=2\frac{Q_{bi}}{Q_{r(i+1)}}\[(\frac{K_{bi}{v}_{bi}{\mathrm{cos\β}}_i}{v_{r(i+1)}}-2)+\frac{Q_{bi}}{Q_{r(i+1)}}\]\frac{\mathrm{\ρ}}{2}{v}_{r(i+1)}^2$

Δp_kiEvery jet blower for i-th interlude rises pressure, v_kiIn the middle of i-th The air outlet velocity of the jet blower of section, A_kiExit face for the jet blower of i-th interlude Long-pending, Δ p_si、v_si、A_siIn subscript k only represent jet blower, i represents this blower fan place Interlude serial number, η_iJet blower position friction loss reduction system for i-th interlude Number.

Computer determines in each vertical shaft jet blower parameter in axial flow blower parameter and tunnel, returns Return step 200, replace the fan parameter preset in step 200 with the fan parameter obtained；

Step 700, installs axial flow blower and jet blower

Computer circulation step 100 to 600 until determine Entrance ramp section, exit ramp section and Each axial flow blower of all interludes and jet blower parameter, install axial flow blower and jet wind Machine.

Wherein,

Q_ei/Q_ri≤ 1.0, Q_bi/Q_r(i+1)≤ 1.0,0.9≤C_i≤ 1.0,0≤C_1zd≤ 1.0,0.5≤C_2zd≤1.0。

Should be understood that the present embodiment is merely to illustrate the present invention rather than limits the model of the present invention Enclose.In addition, it is to be understood that after having read the content that the present invention lectures, those skilled in the art Can make various changes or modifications the present invention, these equivalent form of values fall within appended by the application equally Claims limited range.

Claims (5)

1. there is a vcehicular tunnel blower fan method to set up for ring road gateway, it is characterized in that, described Vcehicular tunnel includes Entrance ramp section (1), n-1 the interlude (2) being arranged in order and outlet Ring road section (3), Entrance ramp section include entrance major trunk roads (11) and with entrance major trunk roads angle For the Entrance ramp (12) of β, exit ramp section include exporting major trunk roads (31) and with outlet Major trunk roads angle is the exit ramp (32) of α；Every pair of adjacent interlude intersection is equipped with one Individual vertical shaft (4), each vertical shaft and each interlude all according to from road tunnel entrance to outlet Sequentially number consecutively；Entrance major trunk roads, Entrance ramp, each interlude, exit ramp, It is respectively provided with CO concentration detection apparatus on outlet major trunk roads；Comprise the steps:

(1-1) being provided with entrance major trunk roads basal area in computer is A_r1, air pressure is p₁； Entrance ramp basal area is A_b1, air pressure is p_1zd；Entrance major trunk roads and Entrance ramp converge The basal area at place is A_r2, air pressure is p₂；Outlet major trunk roads basal area is A_r(n+1), empty Atmospheric pressure is p_(n+1)；The basal area of outlet major trunk roads and exit ramp crotch is A_rn, pressure For p_n；The basal area of exit ramp is A_en, air pressure is p_2zd；The air of entrance major trunk roads Flow Q_r1, entrance major trunk roads and air mass flow Q of Entrance ramp meet_r2, Entrance ramp Air mass flow Q_b1；Outlet major trunk roads and air mass flow Q of exit ramp crotch_rn, export circle Air mass flow Q in road_en, air mass flow Q of outlet major trunk roads_r(n+1)；

(1-1-1) first equation of momentum is set up:

A_r1p₁+A_b1p_1zdcosβ-A_r2p₂=ρ Q_r2v_r2-ρK_b1Q_b1v_b1cosβ-ρQ_r1v_r1,

Wherein, ρ is atmospheric density coefficient, K_b1For sending of Entrance ramp and entrance major trunk roads junction Air port boosting momentum coefficient；

Computer utilizes formula

Calculate the air velocity v of entrance major trunk roads_r1, entrance trunk The air velocity v of road and Entrance ramp meet_R2,The air velocity v of Entrance ramp_b1；

Computer makes p_1zd=p₁, by v_r1、v_r2And v_b1Substitute into first equation of momentum, obtain after arrangement Entrance ramp section blast pressure increment Delta p_b1:

$\begin{array}{c}{\mathrm{\Δp}}_{b1}=p_2-p_1\\ =2\frac{A_{r2}}{A_{r1}}\frac{Q_{b1}}{Q_{r2}}\[\frac{Q_{b1}}{Q_{r2}}+(1-\frac{A_{r1}}{A_{r2}})\frac{Q_{r2}}{Q_{b1}}+\frac{A_{r1}}{A_{r2}}\frac{K_{b1}{v}_{b1}}{v_{r2}}cos\mathrm{\β}-2\]\·\frac{\mathrm{\ρ}}{2}{v}_{r2}^2;\end{array}$

(1-1-2) second equation of momentum is set up

A_rnp_n-A_enp_2zdcosα-A_r(n+1)p_(n+1)=ρ Q_r(n+1)v_r(n+1)+ρK_enQ_env_encosα-ρQ_rnv_rn；

Wherein, K_enExhaust outlet boosting momentum coefficient it is connected with major trunk roads for exit ramp；

Computer utilizes formula

Calculate outlet major trunk roads and exit ramp crotch is empty Gas velocity v_rn, exit ramp air velocity v_en, the air velocity v of outlet major trunk roads_n(n+1)；

Computer makes p_2zd=p_(n+1), by v_r1、v_r2And v_b1Substitute into second equation of momentum, after arrangement Air draft pressure increase Δ p to exit ramp section_en:

$\begin{array}{c}{\mathrm{\Δp}}_{en}=p_{\left(n+1\right)}-p_n\\ =2\frac{A_{rn}}{A_{r\left(n+1\right)}}\frac{Q_{en}}{Q_{rn}}\[2-\frac{Q_{en}}{Q_{rn}}-\left(1-\frac{A_{r\left(n+1\right)}}{A_{rn}}\right)\frac{Q_{rn}}{Q_{en}}-\frac{A_{r\left(n+1\right)}}{A_{rn}}\frac{K_{en}{v}_{en}}{v_{rn}}\cos \mathrm{\α}\]\·\frac{\mathrm{\ρ}}{2}{v}_{rn}^2\end{array};$

(1-1-3) computer settings

$v_{r(i+1)}=\frac{Q_{r(i+1)}}{A_{r(i+1)}},{\mathrm{\Δp}}_{ei}=2\frac{Q_{ei}}{Q_{ri}}\[(2-\frac{K_{ei}\·v_{ei}}{v_{ri}})-\frac{Q_{ei}}{Q_{ri}}\]\·\frac{\mathrm{\ρ}}{2}\·v_{ri}^2,$

${\mathrm{\Δp}}_{bi}=2\frac{Q_{bi}}{Q_{r(i+1)}}\[(\frac{K_{bi}{v}_{bi}{\mathrm{cos\β}}_i}{v_{r(i+1)}}-2)+\frac{Q_{bi}}{Q_{r(i+1)}}\]\frac{\mathrm{\ρ}}{2}{v}_{r(i+1)}^2,$ Q_r(i+1)=Q_ri-Q_ei+Q_bi；

Wherein, Δ p_eiExhaust outlet for i-th vertical shaft rises pressure, Δ p_biAir-supply for i-th vertical shaft Mouth rises pressure, i=1 ..., n-2；

Q_riFor the air mass flow of i-th vertical shaft, A_riFor the major trunk roads basal area of i-th interlude, v_riFor the air velocity of i-th interlude, v_r(i+1)For the air velocity of i+1 interlude, A_r(i+1)For the basal area of i+1 interlude, Δ p_eiExhaust outlet for i-th vertical shaft rises pressure, Q_eiFor the exhaust outlet exhaust air rate of i-th vertical shaft, Q_riFor the air mass flow of i-th interlude, K_ei For the exhaust outlet boosting momentum coefficient of i-th vertical shaft, v_eiExhaust outlet air for i-th vertical shaft Flow velocity, Q_biFor the air outlet air output of i-th vertical shaft, Q_r(i+1)Sky for i+1 interlude Throughput, K_biFor the air outlet boosting momentum coefficient of i-th vertical shaft, v_biFor i-th vertical shaft Air outlet air velocity, β_iAir-supply passage and the angle at vcehicular tunnel top for i-th vertical shaft；

$C_1=\frac{Q_{req1}}{Q_{r1}},C_{i+1}=\frac{(Q_{ri}-Q_{ei})\·C_i+Q_{req(i+1)}+Q_{bi}\·C_{bi}}{Q_{r(i+1)}},$

Wherein, C₁It is the air concentration ratio of the 1st silo bottom, C_iFor i-th silo bottom Air concentration ratio, C_i+1For the air concentration ratio of i+1 silo bottom, Q_req1For entrance trunk The required airflow in road, Q_req1It is directly proportional to the CO concentration of entrance major trunk roads detection, Q_req(i+1)It is The required airflow of i+1 interlude, Q_req(i+1)Just become with the CO concentration of i+1 interlude detection Ratio, C_biAir-supply concentration ratio for i-th vertical shaft；

$C_{b1}=C_{1zd}=\frac{Q_{req1zd}}{Q_{b1}},C_{2zd}=C_{(n-2)}+\frac{Q_{req2zd}}{Q_{e(n-2)}},$ Wherein, C_b1Air for Entrance ramp Concentration ratio, Q_req1zdFor the required airflow of Entrance ramp, Q_req1zdDense with the CO of Entrance ramp detection Degree is directly proportional, C_(n-2)It is the air concentration ratio of the n-th-2 silo bottoms, Q_req2zdFor outlet circle The required airflow in road, Q_req2zdIt is directly proportional to the CO concentration of exit ramp detection, C_2zdExit ramp Air concentration ratio；

Q_bi·(1-C_bi)=Q_req(i+1)-(Q_ri-Q_ei)·(1-C_i)；

(1-2) initial value of the air output of computer calculating entrance tunnels sectionAnd entrance tunnels section Air quantity initial value

$Q_{b0}^0=Q_{r1}^0=\underset{j=1}{\overset{m+1}{\Σ}}{Q}_{reqj}-\underset{j=1}{\overset{m}{\Σ}}{Q}_{bj}\·(1-C_{bj})$

M represents that between Entrance ramp section and first air output vertical shaft undetermined, air output has determined vertical shaft Number；

Q_reqjRequired airflow for jth interlude；

Q_bjAir output for jth vertical shaft；

C_bjAir-supply concentration ratio for jth vertical shaft；

Judge the sky of all silo bottoms in the vertical shaft that Entrance ramp section is undetermined with first air output Gas concentration, than C value, if having the air concentration of any one silo bottom than C ＞ 1, is then continuously increased The air output of Entrance ramp section, until the air concentration of all of silo bottom more equal than C≤1 Time obtain Q_b0, make Q_r1=Q_b0；

As m ＞ 0, the Q of calculating the 2nd to m+1 interlude_rAnd v_r, wherein Q_rUtilize recursion Formula Q_r(j+1)=Q_rj-Q_ej+Q_bjObtain；

When judging C:

Serial number is the air concentration ratio of the silo bottom of 1

The air concentration ratio of the silo bottom of serial number ＞ 1, uses equation below to solve:

$C_{i+1}=\frac{(Q_{ri}-Q_{ei})\·C_i+Q_{req(i+1)}+Q_{bi}\·C_{bi}}{Q_{r(i+1)}};$

(1-3) computer calculates the air output initial value of next air output vertical shaft undeterminedIf working as The serial number of front air output vertical shaft undetermined is i, then:

$Q_{bi}^0=\underset{j=i+1}{\overset{m^{\′}+i+1}{\Σ}}{Q}_{reqj}-Q_{sfi}-\underset{j=i+1}{\overset{m^{\′}+i}{\Σ}}{Q}_{bj}\·(1-C_{bj})$

Wherein, Q_reqjFor the required airflow of jth interlude, Q_sfiFor i-th silo bottom air-flow In equivalent amount of fresh air, Q_bjFor the air output of jth vertical shaft, C_bjFor jth vertical shaft Air-supply concentration ratio, m ' represents that current air output vertical shaft undetermined and the first air output in its front are undetermined perpendicular Between well, air output has determined the number of vertical shaft；

Judge that current air output vertical shaft undetermined front is to all perpendicular in first air output vertical shaft undetermined The air concentration of bottom is than C value, if having the air concentration of any one silo bottom than C ＞ 1, Then it is continuously increased the air output of current air output vertical shaft undetermined, until the sky of all of silo bottom Gas concentration is more equal than C≤1 time obtain Q_bi；

Calculate i+1 to the Q of+1 interlude of i+m '_rAnd v_r；

Judge to use formula during C $C_{i+1}=\frac{Q_{req(i+1)}+(Q_{ri}-Q_{ei})\·C_i+Q_{bi}\·C_{bi}}{Q_{r(i+1)}}$ Solve；

(1-4) computer circulation step (1-3), until obtaining from Entrance ramp section to outlet circle The air output Q of all vertical shafts of road section_b, Entrance ramp section, exit ramp section and all interludes Q_rAnd v_r；

(1-5) computer calculates Entrance ramp section, exit ramp section and the pressure of all interludes Δp_iAnd required jet blower number of units J_i；

(1-6) determine in each vertical shaft jet blower parameter in axial flow blower parameter and tunnel, return Return step (1-1), replace the blower fan ginseng preset in step (1-1) with the fan parameter obtained Number；

(1-7) computer circulation step (1-1) to (1-6) until determine Entrance ramp section, Exit ramp section and the rational axial flow blower of all interludes and jet blower parameter, install axial flow Blower fan and jet blower.

There is the vcehicular tunnel blower fan side of setting of ring road gateway the most according to claim 1 Method, is characterized in that, the pressure Δ p of described step (1-5)_iEquation below is utilized to be calculated: Δp_i=Δ p_ri-Δp_ti+Δp_mi；

Meanwhile, at the junction of Entrance ramp Yu entrance major trunk roads, Ying You

Δp₁=Δ p_1zd

Wherein, Δ p₁=Δ p_t1-Δp_r1-Δp_m1+∑Δp_j1,

Δp_1zd=Δ p_t1zd-Δp_r1zd-Δp_m1zd+∑Δp_j1zd；

At the junction of exit ramp with outlet major trunk roads, Ying You

Δp_(n+1)=Δ p_2zd,

Wherein, Δ p_(n+1)=Δ p_t(n+1)-Δp_r(n+1)-Δp_m(n+1)+∑Δp_j(n+1),

Δp_2zd=Δ pt_2zd-Δp_r2zd-Δp_m2zd+∑Δp_j2zd；

Wherein, Δ p_riFor i-th interlude and v_rRelevant ventilation resistance, Δ p_tiIn the middle of i-th Section and v_rRelevant ventilation by trattic power, Δ p_miFor the natural wind resistance of i-th interlude, ∑ Δ p_j1zdPressure, ∑ Δ is always risen for jet blower group in Entrance ramp_pj1In being the 1st section major trunk roads Jet blower group always rises pressure, ∑ Δ p_j(n+1)Pressure is always risen for outlet major trunk roads jet blower group, ∑Δp_j2zdPressure, Δ pt is always risen for jet blower group in exit ramp_2zdFriendship for exit ramp Wind-force all, Δ p_r2zdFor the ventilation resistance of exit ramp, Δ p_m2zdFor exit ramp from So wind resistance, Δ p_t1zdFor the ventilation by trattic power of Entrance ramp, Δ p_r1zdLeading to for Entrance ramp Windage drag, Δ p_m1zdNatural wind resistance for Entrance ramp.

There is the vcehicular tunnel blower fan side of setting of ring road gateway the most according to claim 1 Method, is characterized in that, jet blower number of units J of described step (1-5)_iCalculated by following two formulas:

${\mathrm{\Δp}}_{ki}=\mathrm{\ρ}\·v_{ki}^2\·\frac{A_{ki}}{A_{ri}}\·(1-\frac{v_{ri}}{v_{ki}})\·{\mathrm{\η}}_i$

Wherein: ${\mathrm{\Δp}}_{ei}=2\frac{Q_{ei}}{Q_{ri}}\[(2-\frac{K_{ei}\·v_{ei}}{v_{ri}})-\frac{Q_{ei}}{Q_{ri}}\]\·\frac{\mathrm{\ρ}}{2}\·v_{ri}^2,$

${\mathrm{\Δp}}_{bi}=2\frac{Q_{bi}}{Q_{r\left(i+1\right)}}\[\left(\frac{K_{bi}{v}_{bi}{\mathrm{cos\β}}_i}{v_{r\left(i+1\right)}}-2\right)+\frac{Q_{bi}}{Q_{r\left(i+1\right)}}\]\frac{\mathrm{\ρ}}{2}{v}_{r\left(i+1\right)}^2$

Δp_kiEvery jet blower for i-th interlude rises pressure, v_kiFor i-th interlude The air outlet velocity of jet blower, A_kiFor the discharge area of the jet blower of i-th interlude, Δp_si、v_si、A_siIn subscript k only represent jet blower, i represents the centre at this blower fan place Section serial number, η_iJet blower position friction loss reduction coefficient for i-th interlude.

There is the vcehicular tunnel blower fan side of setting of ring road gateway the most according to claim 1 Method, is characterized in that,

Q_ei/Q_ri≤ 1.0, Q_bi/Q_r(i+1)≤ 1.0,0.9≤C_i≤ 1.0,0≤C_1zd≤ 1.0,0.5≤C_2zd≤1.0。

5. the vcehicular tunnel of ring road is had according to the gateway described in claim 1 or 2 or 3 or 4 Blower fan method to set up, is characterized in that, CO concentration detection apparatus includes MQ-2 sensor, MQ-135 Sensor, CO sensor and microprocessor, microprocessor respectively with MQ-2 sensor, MQ-135 Sensor, CO sensor and computer electrical connection；

Also comprise the steps:

MQ-2 sensor, MQ-135 sensor and CO sensor detected gas signal, micro-place Reason device receives detection signal S1 (t) of CO sensor, detection signal S2 (t) of MQ-2 sensor, Detection signal S3 (t) of MQ-135 sensor；

Microprocessor utilizes formula

Signal (t)=S1²(t)+(S1(t)-S2(t))²+(S1(t)-S3(t))²Calculate To gas detection signals signal (t) removed after disturbing, microprocessor calculates and obtains signal (t) Meansigma methods signal in time T, computer utilizes formula signal × SS calculate and entered Mouth major trunk roads, Entrance ramp, each interlude, exit ramp, the required airflow of outlet major trunk roads； Wherein, SS is the required airflow conversion coefficient set.