CN2257330Y - Exhaust-gas purifier for automobile - Google Patents

Abstract

The utility model discloses a novel exhaust-gas purifier for automobiles, and the utility model is suitable for the exhaust-gas purification of the power parts of gasoline engines. The utility model is composed of a box body, a catalytic bed, a spherical catalyst, a cylindrical muffler, a gas inlet, a gas outlet, a silk screen, and a material inlet. The catalytic bed is arranged in the box body in a tilting way, and the catalytic bed comprises main bed plates and a flow guide plate which forms 147 to 150 DEG with the main bed plate; the catalytic bed and the box body form a hollow body which is filled with the spherical catalyst, and the center lines of two main bed plates and the center line of the box body form an angle of 10 to 12 DEG; the catalytic bed is provided with a shutter, the cylindrical muffler is arranged near the main wall face for ventilating at the gas outlet end of the box body, and the material inlet is arranged on the side wall of the box body. The utility model has the advantages of high efficiency, small gas barrier, small falling of dynamic performance, silencing function, etc.

Description

A kind of new automobile exhaust gas cleaner

The utility model relates to the purification plant of gasoline engine car tail gas, belongs to the venting gas appliance field of automobile power part, is applicable to the purification of petrol engine power section tail gas.

In the waste gas of motor vehicle emission CO is arranged; HC; Harmful gases such as NOX, its discharge amount account for more than 40% of urban atmosphere waste gas total amount; Along with increasing rapidly of automobile pollution, vehicle exhaust constitutes a serious threat to environment for human survival.Thereby each state all is being devoted to the improvement of vehicle exhaust.

At present, developed countries such as U.S., day, English, moral generally adopt precious metals such as platinum, rhodium to prepare catalyzer and administer vehicle exhaust, and this catalyzer to be only applicable to air fuel ratio be 14.6: 1-14.7: 1 motor and using on the vehicle of unleaded gas, the comprehensive value of its device, Carburetor and unleaded gas is very expensive.

In recent years, the purification plant of domestic and international application spherical rare-earth catalyzer adopted the housing structure of single, double bed downflow more, and there are the following problems:

1. catalytic bed wall sealing, breathing area is little, and the dead angle is arranged, and the air-flow corner that passes through is big, and vapour lock is big, is the major reason that automobile dynamic quality is descended;

2. approximate being vertically entered when air communication was crossed catalytic bed, so the catalysis time is short, influenced purification efficiency;

3. catalytic bed and housing weld all can cause waste gas " short circuit " (being that waste gas is not discharged by catalyzer) as sealing bad or snapping when using;

4. the complex manufacturing of this purification plant.

The purpose of this utility model is: for addressing the above problem, and provide a kind of production technology simple, vapour lock is little, the purification efficiency height, and automobile dynamic quality descends little, reliable performance and have the new automobile exhaust gas cleaner of silencing function.

Realize that the technical measures that the utility model purpose is taked are: the utility model is by casing, catalytic bed, spheric catalyst, the tubular shape baffler, suction port, air outlet, silk screen and material feeding mouth are formed: the cross section of casing is a rectangle, its suction port and waste pipe join, the exhaust extension pipe of air outlet sending and receiving motivation, two main bed boards of tilting catalytic bed reach the guide plate that is 147-150 ° of angle with main bed board in the casing, it is the hollow article of rectangle that the wall of catalytic bed and casing constitutes the cross section, and the perpendicular distance between two main bed board is that thickness is the 60-65 millimeter; The center line between two main bed boards and the angle of casing center line are 10 °-12 °.Main bed board welds with the front and back walls of casing respectively mutually with the two ends of guide plate, have venetian blind on main bed board and the guide plate, its blade is 45 with main bed board and guide plate respectively, the inboard of hollow article is lined with silk screen, be full of spheric catalyst in the hollow article, be provided with the tubular shape baffler near the outlet side of casing ventilates main wall, the front and back walls of its two ends and casing is connected, and the sidewall of casing is provided with the material feeding mouth of catalysis ball.

Fig. 1 is a main sectional view of the present utility model, and Fig. 2 is the A-A sectional view of Fig. 1, and Fig. 3 is a partial cutaway plan view of the present utility model.

In conjunction with the accompanying drawings structure of the present utility model and embodiment are described as follows:

The utility model is by casing 1, catalytic bed 2, spheric catalyst 3, tubular shape baffler 4, suction port 5, air outlet 6, silk screen 7 and material feeding mouth 8 are formed, the cross section of casing 1 is a rectangle, and its suction port 5 is connected with waste pipe, the exhaust extension pipe of air outlet 6 sending and receiving motivations, two of tilting catalytic bed 2 main bed boards 21 reach the guide plate 22 that is 147-150 ° of angle with main bed board in the casing 1, catalytic bed 2 is the hollow article of rectangle with the wall formation cross section of casing 1, and the perpendicular distance between two main bed boards is the 60-65 millimeter, and the angle of the center line EE of two main bed boards 21 and casing 1 center line FF is 10-12 °.The two ends of main bed board 21 and guide plate 22 respectively with casing 1 before, rear wall welds mutually, have venetian blind on main bed board and the guide plate, its blade 23 is 45 respectively with main bed board 21 and guide plate 22, the inboard of hollow article is lined with 8 orders, the silk footpath is the silk screen 7 of φ 0.5, be full of spheric catalyst 3 in the hollow article, near ventilating main wall, the outlet side of casing 1 is provided with tubular shape baffler 4, the tubular shape baffler is by having aperture on seal diaphragm and the tube wall, the circle of closed at both ends or oval pipe constitute, welding was connected in the middle of pipe passed seal diaphragm, the aperture gross area that is arranged on the dividing plate both sides on the tube wall equates, the leaving area of difference 〉=purifier, hole diameter is φ 6～φ 6.2, and is vertical, the cross-drilled hole distance is 12～14mm.Through test, its erasure effect is than the low 5～6dB of conventional muffler.The sidewall of casing 1 is provided with the material feeding mouth 8 of spheric catalyst 3.

Except that spherical rare-earth catalyzer and casing can adopt the plain carbon steel, all the other all adopt stainless steel material to make.

The utility model structure possesses following advantage:

1. because catalytic bed does not have the wall of sealing, combine no dead angle, back and " short circuit " phenomenon with casing, enlarged the loading of catalysis ball, increased the breathing area of tail gas, prolong the time of contact of tail gas and catalyzer, catalytic performance is given full play to, thereby improved the purifying effect of vehicle exhaust; 2. open shutter on main bed board and the guide plate, its gross area has guaranteed that greater than 7.5 times of the suction port gross area vehicle exhaust enters the spheric catalyst layer under the situation of very slight drag; 3. the sum total of the interval area between the catalysis spheroid is greater than the suction tude sectional area, so make exhaust resistance less than 1%, actual measurement is 0.3%; 4. because main bed board and guide plate are 147-150 ° of angle, and venetian blind is arranged on the guide plate, so gas enters casing under non-angular and 30 ° of left and right rotation angles, comparable like product resistance reduces more than 1/3; 5. converge the generation eddy current by guide plate venetian blind main air flow that enters and the air-flow that enters catalytic layer by main bed board, increased the run duration of waste gas in catalytic layer, thereby increased purifying effect; 6. the tubular shape baffler that is provided with of outlet side has destroyed the vibration frequency of air-flow, has played the effect of noise reduction.

It is as follows to be contained on 376 motors test result:

Purification ratio CO:97%, HC:95%, power character descends: 0.3% These parameters has satisfied the requirement of GB14761.5-93 far away, and reaches ECE the early 1990s standard.

Claims (6)

1. a new automobile exhaust gas cleaner is characterized in that, by casing (1), and catalytic bed (2), spheric catalyst (3), tubular shape baffler (4), suction port (5), air outlet (6), silk screen (7) and material feeding mouth (8) are formed:

The cross section of casing (1) is a rectangle, and its suction port (5) is connected with waste pipe, the exhaust extension pipe of air outlet (6) sending and receiving motivation;

Two main bed boards (21) of tilting catalytic bed (2) reach the guide plate (22) that is 147 ° of-150 ° of angles with main bed board in the casing (1), catalytic bed (2) is the hollow article of rectangle with the wall formation cross section of casing (1), weld mutually with the front and back walls of casing (1) respectively at the two ends of main bed board (21) and guide plate (22), has venetian blind (23) on main bed board and the guide plate; The hollow article inboard is lined with silk screen (7), and the inboard of silk screen (7) has been full of spheric catalyst (3); Be provided with tubular shape baffler (4) near the main wall of ventilation of casing (1) outlet side, the front and back walls of its two ends and casing (1) is connected, and the sidewall of casing (1) is provided with the material feeding mouth (8) of spheric catalyst.

2. by the described automobile exhaust gas purifying installation of claim 1, it is characterized in that the perpendicular distance (b) between (2) two main bed boards of catalytic bed is the 60-65 millimeter.

3. by claim 1 or 2 described automobile exhaust gas purifying installations, it is characterized in that the center line (EE) of two main bed boards (21) is 10-12 ° with the angle of casing (1) center line (FF).

4. by the described automobile exhaust gas purifying installation of claim 1, it is characterized in that shutter blade (23) is 45 with main bed board (21) and guide plate (22) respectively.

5. by the described automobile exhaust gas purifying installation of claim 1, it is characterized in that used silk screen (7) is 8 orders, external diameter is the hole of φ 0.5.

6. by the described gas tail gas of claim 1 purification plant, it is characterized in that: tubular shape baffler (4) constitutes by having circle aperture, closed at both ends or oval pipe on seal diaphragm and the tube wall, welding was connected in the middle of pipe passed seal diaphragm, the wall welding of seal diaphragm and casing afterbody is connected, the aperture gross area that is arranged on the dividing plate both sides on the tube wall equates, the leaving area of difference 〉=purifier, hole diameter are φ 6～φ 6.2, and longitudinal and transverse distance is 12～14mm.