CN219302250U - Compression ignition type engine exhaust detection device - Google Patents

Abstract

The utility model discloses an exhaust detection device of a compression ignition engine. The detection device comprises a box module, and a gas detection module and a lens cleaning module which are arranged in the box module. The gas detection module comprises a flue gas pipeline, a light source generator, a photoelectric converter and a lens. The lens cleaning module includes a drive assembly and two spray wiper assemblies. The two spray wiping assemblies are used to clean the two lenses, respectively. The spray wiping assembly includes a sliding wiping assembly and a water spray assembly. The sliding wiper assembly includes a wiper slide and a wiper. The lens cleaning device and the wiping device adopted by the utility model can synchronously act, can keep the cleaning of the lens before detection, ensure the accuracy of exhaust detection of the compression ignition engine, and have compact structure and convenient operation. In addition, the spraying and wiping of the cleaning liquid for the lens are driven by the same motor, so that the structural complexity of the lens cleaning module is reduced.

Description

Compression ignition type engine exhaust detection device

Technical Field

The utility model belongs to the technical field of compression ignition engine exhaust detection, and particularly relates to a compression ignition engine exhaust detection device.

Background

With the rapid development of economy in China, the maintenance amount of mechanical equipment taking a compression ignition engine for combusting diesel oil as a power element is continuously increased, a large amount of polluted waste gas which seriously affects the ecological environment is generated in the running process of the engine, the exhaust of the engine is rapidly and accurately detected, the emission of the mechanical equipment is improved, the atmospheric pollution caused by the emission of the compression ignition engine is reduced, and the urgent need of harmony development between people and nature is formed. At present, in practical application, two indexes of the light-tight smoke intensity and the ringeman blackness of exhaust gas are mainly detected according to GB36886-2018, and two methods of filter paper contrast detection and photoelectric measurement are usually adopted. The filter paper contrast detection method cannot detect real-time values of two indexes, and the accuracy is low. The photoelectric measurement method is characterized in that the device is used for receiving the transmittance, turbidity and extinction degree of the emitted light after passing through the flue gas of the pipeline, and then converting the light into an electric signal, so that the detection of two indexes of the light-tight smoke degree and the ringeman blackness is realized. However, the temperature of exhaust gas discharged from a compression ignition engine is high, and after long-term use, a lens in a photoelectric measurement device is often accumulated by soot particles in exhaust gas, so that detection accuracy is poor, and long-term use affects detection results due to complex lens replacement. Therefore, there is an urgent need for a device for preventing contamination of lenses in an electro-optical measurement method to solve this problem, and to maintain the detection accuracy of the machine.

Disclosure of Invention

The utility model aims to solve the problems that an instrument adopting the photoelectric measurement principle seriously pollutes a lens after detecting the exhaust of a compression ignition engine for a plurality of times, influences the light-tight smoke degree and the ringeman blackness detection precision and the like, and provides a compression ignition engine exhaust detection device capable of automatically cleaning the lens before detection.

The utility model relates to an exhaust detection device of a compression ignition engine, which comprises a box body module, and a gas detection module and a lens cleaning module which are arranged in the box body module. The gas detection module comprises a flue gas pipeline, a light source generator, a photoelectric converter and a lens. The flue gas pipeline is T-shaped and comprises an air inlet pipe and a detection pipe. The output end of the air inlet pipe is communicated with the middle part of the detection pipe. The input end of the air inlet pipe is connected with a tested tail gas input port on the box body module. The light source generator and the photoelectric converter are respectively arranged at two ends of the detection tube. Lenses are arranged between the light source generator and the detection tube and between the photoelectric converter and the detection tube.

The lens cleaning module comprises a driving assembly and two spraying wiping assemblies. The two spray wiping assemblies are used to clean the two lenses, respectively. The spray wiping assembly includes a sliding wiping assembly and a water spray assembly. The sliding wiper assembly includes a wiper slide and a wiper. The wiping slide block is connected in the box body module in a sliding way. The sliding track of the wiping slide block is positioned between the corresponding lens and the detection tube. One side of the wiping slide block, which is close to the corresponding lens, is provided with wiping cloth; the position of the wiping cloth corresponds to the position of the lens; in the process of reciprocating sliding of the wiping slide block, the wiping cloth wipes the side face of the lens, which faces the detection tube. The wiping slide blocks in the two spraying wiping components are driven by the driving component to synchronously slide.

The water spraying assembly comprises an inclined guide post, a compressed liquid bag, a drainage pipeline, a liquid spraying pipe, a water injection pipeline, a water tank, a water injection port and an extrusion assembly. The spray pipe is fixed in the box module, and the output port inclines towards the corresponding lens. The water tank is fixed in the tank module. The input port at the top of the water tank is connected with the water injection port arranged on the tank body module through a water pipe. The water outlet at the bottom of the water tank is communicated with the water inlet at the top of the compressed liquid bag through a water injection pipeline. The input port of the spray pipe is connected with the water outlet at the bottom of the compressed liquid bag through a drainage pipeline.

The extrusion assembly comprises a guide post slider. The guide pillar slide block is connected in the box body module in a sliding way. One end of the compressed liquid bag is fixed with the box body module. The other end of the compression liquid bag is fixed with the guide post slide block. An inclined duct is formed in the top of the guide pillar sliding block. The inner end of the inclined guide post is fixed with the wiping slide block, and the outer end of the inclined guide post is arranged obliquely downwards.

The inclined guide pillar and the guide pillar sliding block are aligned along the sliding direction of the wiping sliding block and have corresponding shapes. In the process that the wiping slide block slides to the lens, the inclined guide pillar is inserted into the inclined pore canal on the guide pillar slide block and drives the guide pillar slide block to slide to the compressed liquid sac, so as to squeeze the compressed liquid sac.

Preferably, the driving assembly comprises a motor, a motor supporting plate, a driving shaft, a rotating wheel, a pinion, a large gear, a driven shaft and a transmission rod. The driving shaft and the two driven shafts are rotationally connected in the box body module. Pinion gears are fixed at two ends of the driving shaft. And large gears are fixed on the two driven shafts. The motor is fixed in the box module through the motor backup pad, and the output shaft is fixed with one end of driving shaft. The two pinions are respectively meshed with the two large gears. The inner ends of the two driven shafts are coaxially fixed with rotating wheels. One end of the two transmission rods is respectively and rotatably connected with the eccentric positions of the outer side surfaces of the two rotating wheels. The other ends of the two transmission rods are respectively and rotatably connected with the wiping sliding blocks in the two spraying wiping components.

Preferably, the flue gas pipeline is provided with a heating module.

Preferably, a first air suction fan is arranged in the tested tail gas input port;

preferably, the distances between the light source generator, the photoelectric converter and the corresponding lens are equal to the focal length of the lens.

Preferably, the extrusion assembly further comprises a fixing seat, a limiting block, a guide rod and a spring. The fixing seat is fixed in the box body module. The guide post slide block is connected to the fixing seat in a sliding way. A guide rod is fixed on one side of the guide post slide block, which is far away from the compressed liquid bag; a limiting block is fixed on one side of the fixing seat, which is far away from the compressed liquid bag. The guide rod passes through the limiting block. The outer end of the guide rod is provided with an annular bulge. The guide rod is sleeved with a spring. The two ends of the spring respectively prop against the limiting block and the annular bulge at the outer end of the guide rod.

Preferably, the water filling opening is closed by a water filling plug during operation.

Preferably, the axis of the inclined guide post and the axis of the inclined duct are in the same vertical plane, and the included angle between the axis of the inclined guide post and the horizontal plane is 2 degrees larger than the included angle between the axis of the inclined duct and the horizontal plane. When the inclined guide post is inserted into the inclined duct, the inclined guide post and the inclined duct form clearance fit. In the initial state, the bottom end of the inclined guide post is positioned right above the top end of the inclined duct.

Preferably, a valve for closing the drain line is provided on the drain line.

Preferably, the drainage pipeline comprises a first drainage pipeline, a water level display pipe, a second drainage pipeline and a third drainage pipeline which are connected in sequence. The first drainage pipeline is connected with a water outlet of the compressed liquid bag. The third drainage pipeline is connected with the input port of the liquid spraying pipe. The top end of the water level display tube arranged vertically is higher than the top of the water tank; the bottom of the water level display tube is lower than the bottom of the water tank. Transparent materials are adopted for the water level display tube; and an observation window is arranged at a position on the box body module corresponding to the water level display tube.

Preferably, the box module is further provided with a pipeline exhaust module. The pipeline exhaust module comprises an exhaust main pipeline, a second air suction fan and an exhaust pipe. The main exhaust pipeline is fixed in the box body module; the second suction fan is fixed at the input end of the main exhaust pipeline. The input ends of the two exhaust pipes are respectively connected with the output end of the main exhaust pipe. The output ends of the two exhaust pipes are respectively opened towards the two ends of the detection pipe. The output ends of the two exhaust pipes are respectively aligned with the two exhaust ports at the bottom of the box body module.

Preferably, the box module comprises a box shell, a box handle, a water injection plug and an air suction port which are arranged at the top of the box shell, wherein the side part of the box shell comprises a power supply interface, a data transmission interface, a numerical display screen, a tested tail gas input port, an exhaust port and a waste water storage box which are arranged at the bottom of the box shell.

Preferably, a supporting seat is fixed in the box body shell. The first lens box and the second lens box are fixed on the supporting seat. The first lens box is located between the photoelectric converter and the detection tube. The second lens box is positioned between the light source generator and the detection tube. The two lenses are respectively arranged in the first lens box and the second lens box.

The beneficial effects of the utility model are as follows:

1. the lens cleaning device and the wiping device adopted by the utility model can synchronously act, can keep the cleaning of the lens before detection, ensure the accuracy of exhaust detection of the compression ignition engine, and have compact structure and convenient operation. In addition, the spraying and wiping of the cleaning liquid for the lens are driven by the same motor, so that the structural complexity of the lens cleaning module is reduced.

2. The exhaust fan is arranged in the box body module, so that the exhaust fan can absorb the gas discharged by the engine from the outside and prevent the gas from staying in the detection instrument for a long time, and the cleaning of the equipment in the non-working time is ensured.

3. The exhaust fan of the engine is arranged in the flue gas detection pipeline designed by the utility model, so that the gas exhausted by the compression ignition engine can smoothly enter the detection device; the resistance heating device is arranged beside the flue pipe, the temperature of the pipeline can be increased before detection, the phenomenon that water vapor in exhaust is condensed when meeting cold is prevented, and the detection result is ensured.

Drawings

Fig. 1 is a schematic view of a first overall structure of the present utility model.

Fig. 2 is a schematic diagram of a second overall structure of the present utility model.

Fig. 3 is a schematic view of the internal structure of the present utility model.

FIG. 4 is a schematic diagram showing a combination of a gas detection module and a lens cleaning module according to the present utility model.

Fig. 5 is an enlarged schematic view of the structure of the portion a in fig. 4.

Fig. 6 is a schematic diagram of an internal structure of a gas detection module according to the present utility model.

FIG. 7 is a schematic view of a water jet assembly according to the present utility model.

Fig. 8 is a schematic structural view of a duct exhaust module according to the present utility model.

Detailed Description

The structure of the present utility model will be further explained with reference to the drawings.

As shown in fig. 1, 2 and 3, a compression ignition engine exhaust gas detection apparatus includes a housing module, and a gas detection module, a lens cleaning module and a duct exhaust module mounted in the housing module. The gas detection module is used for detecting the light-tight smoke intensity and the ringeman blackness of the smoke output by the tested engine. The lens cleaning module is used for cleaning the lens in the gas detection module before the smoke detection. The pipeline exhaust module is used for driving the flue gas flowing through the gas detection module to be output outside the box module.

As shown in fig. 1 and 2, the tank module includes a tank housing 101, a tank handle 102, a water filling plug 103 and an air suction port 104 which are disposed at the top of the tank housing 101, a power supply interface, a data transmission interface, a numerical display 107, a measured tail gas input 105, a water level display 108 which are disposed at the side of the tank housing 101, an air exhaust port, a waste water storage box 109 and four support columns 106 which are disposed at the bottom of the tank housing 101. The wastewater storage box is fixed with the bottom surface of the box body in a magnetic attraction way. The waste water receiver is used for receiving the waste water that produces in the process of wasing lens.

As shown in fig. 3, 4 and 6, the gas detection module includes a smoke duct 116, a light source generator 4, a photoelectric converter 5, a lens 8 and a getter module. The flue gas duct 116 is T-shaped and includes an inlet pipe and a detection pipe. The output end of the air inlet pipe is communicated with the middle part of the detection pipe. The input end of the air inlet pipe is connected with a tested tail gas input port 105 on the box body module. The air suction module comprises a first air suction fan 9 arranged in the tested tail gas input port 105; the light source generator 4 and the photoelectric converter 5 are respectively disposed at both ends of the detection tube. The bottoms of the two ends of the detection tube are respectively provided with an output port for discharging cleaning liquid. A support base 117 is fixed in the case housing 101. The first lens cartridge 111 and the second lens cartridge 110 are fixed to the support base 117. The first lens box 111 is located between the photoelectric converter 5 and the detection tube. The second lens box 110 is located between the light source generator 4 and the detection tube. The first lens box 111 and the second lens box 110 have lenses 8 disposed therein. The two lenses 8 are respectively used for converting the light rays emitted by the light source generator 4 into parallel light rays and converting the light rays emitted by the detection tube to the photoelectric converter 5 into parallel light rays. The distances between the light source generator 4, the photoelectric converter 5 and the corresponding lens are equal to the focal length of the lens.

A heating module 112 is fixed around the flue gas pipeline 116; the heating module 112 includes a resistance heating wire and a temperature feedback sensor, and is used for adjusting the temperature in the flue gas pipeline 116 to be constant in a set interval, so as to avoid the liquefaction of water vapor in the measured tail gas and influence the detection precision.

The lens cleaning module is used for cleaning and wiping lenses at two ends of the detection tube, and detection accuracy reduction caused by lens dust is avoided. The lens cleaning module includes a drive assembly and two spray wiper assemblies. The two spray wiping assemblies are used for cleaning the two lenses respectively and are driven by the driving assembly.

As shown in fig. 3, 4 and 5, the spray wiper assembly includes a sliding wiper assembly and a water spray assembly. The sliding wiper assembly includes a wiper slider 211 and a wiper 213. A guide bracket 113 is fixed in the case housing 101. The guide bracket 113 is provided with a vertical slideway. The wiping slide 211 is slidably connected in the slideway of the guide bracket 113. The sliding track of the wiping slider 211 is located between the corresponding lens and the detection tube. The side surface of the wiping slide block 211, which is close to the corresponding lens, is provided with wiping cloth 213; the wipe 213 is used to wipe dust and oil from the lens. The wiping cloth 213 is made of a flexible material, and can be deformed in accordance with the shape of the side surface of the lens, thereby ensuring that the side surface of the lens is uniformly wiped.

When the wiping slide block 211 is at the first limit position (namely the upper limit position), the wiping slide block 211 is staggered with the lens, so that shielding in detection is avoided; during the movement of the wiper slider 211 from the first limit position to the second limit position (i.e., the lower limit position), the wiper 213 contacts the corresponding lens and slides across the side of the lens, completing wiping the lens.

As shown in fig. 3, 4 and 7, the water spray assembly includes a diagonal guide post 212, a compressed liquid bladder 601, a drain line, a spray pipe 605, a water injection line 606, a water tank 607, a water injection port 608 and a squeeze assembly. A fixing block 115 is fixed in the case housing 101. One end of the compression fluid bladder 601 is fixed to the fixed block 115. The compression liquid bag 601 is bellows-shaped and can stretch and deform; when the compression liquid bladder 601 is compressed, the internal volume is reduced, and the cleaning liquid therein can be discharged. The liquid ejecting pipe 605 is fixed in the box housing 101, and the output port is inclined toward the corresponding lens.

The water tank 607 is fixed in the tank case 101 by the tank support bracket 114. The inlet at the top of the water tank 607 is connected with a water injection port 608 provided at the top of the tank housing 101 through a water pipe. The water outlet at the bottom of the water tank 607 is communicated with the water inlet at the top of the compressed liquid bag 601 through a water injection pipeline 606. The input port of the spray pipe 605 is connected with the water outlet at the bottom of the compressed liquid bag 601 through a drainage pipeline. The end of the compression fluid bag 601 near the fixed block 115 is provided with an incompressible area; the water outlet of the compressed liquid bag 601 is positioned in an incompressible area, so that the water outlet is prevented from being blocked when the compressed liquid bag 601 is shortened.

The extrusion assembly comprises a guide post slider 701, a fixed seat 702, a limiting block 703, a guide rod 704 and a spring 705. The fixing base 702 is fixed in the case housing 101. The guide post slider 701 is slidably connected to the fixing base 702. The guide post slider 701 is fixed to the end of the compressed liquid bladder 601 remote from the fixed block 115. The sliding motion of the guide post slider 701 can drive the compression liquid bag 601 to shorten and lengthen. A guide rod 704 is fixed on one side of the guide pillar slider 701 away from the compressed liquid bag 601; one side of the fixing base 702 far away from the compressed liquid bag 601 is fixed on the limiting block 703. The guide rod 704 passes through the stopper 703. The outer end of the guide rod 704 is provided with an annular protrusion. A spring 705 is sleeved on the guide rod 704. The two ends of the spring 705 respectively support against the limiting block 703 and the annular bulge at the outer end of the guide rod 704. The spring 705 is used to apply a spring force to the guide post slider 701 away from the compressed fluid bladder 601.

An inclined duct is formed at the top of the guide pillar slider 701. The inner end of the inclined guide post 212 is fixed to the wiper slider 211, and the outer end of the inclined guide post 212 is inclined downward. The axis of the inclined guide post 212 and the axis of the inclined duct are in the same vertical plane, and the included angle between the axis of the inclined guide post 212 and the horizontal plane is 2 degrees larger than the included angle between the axis of the inclined duct and the horizontal plane. When the oblique guide post 212 is inserted into the oblique duct, the oblique guide post 212 and the oblique duct form clearance fit. In the initial state, the bottom end of the oblique guide post 212 is located right above the top end of the oblique duct. When the inclined guide post 212 slides downwards along with the wiping slide block 211, the inclined guide post 212 stretches into the inclined duct and drives the guide post slide block 701 to move towards one side close to the compressed liquid bag 601, so that the compressed liquid bag 601 is compressed, and the liquid spraying pipe 605 sprays cleaning liquid to the corresponding lens. Therefore, the water spraying action of the compressed liquid bag 601 on the lens and the wiping action of the wiping cloth 213 on the lens are driven by the same motor, so that the driving structure of the lens wiping is simplified. At the moment when the oblique guide post 212 enters the guide post slider 701, the wiping cloth 213 does not contact the lens, so that the cleaning action of spraying liquid and then wiping is realized.

During operation, the water filling port 608 is closed by the water filling plug 103, so that cleaning liquid in the water tank is prevented from being directly sprayed out of the liquid spraying pipe 605 under the action of gravity. When the compressed liquid bag 601 is extended, negative pressure is generated in the compressed liquid bag 601, and gas in the external environment is sucked from the liquid spraying pipe 605; the gas enters the compressed liquid bag 601 and floats to the water tank 607, and the cleaning liquid in the water tank 607 enters the compressed liquid bag 601; so that the cleaning liquid can be continuously discharged when the compression liquid bladder 601 is compressed next time.

The drain pipe is provided with a valve 119 for closing the drain pipe. The valve 119 may be an electrically operated valve 119 or a manually operated valve 119 may be used. In the case of the manual valve 119, the handle of the manual valve 119 is located outside the tank housing 101 so that a worker manually closes the drain pipe. When water needs to be added into the water tank, the valve 119 on the water discharge pipeline is closed, the water injection plug 103 is removed, and cleaning liquid is poured into the water injection port 608.

The drainage pipeline can be directly connected to the lower water spraying pipe, and can also be bent upwards and then downwards to be connected with the water spraying pipe, so that a U-shaped pipe structure is formed. For the structure that is bent downwards after being bent upwards, the embodiment provides an unnecessary preferred technical scheme: the drain pipe includes a first drain pipe 602, a water level display pipe 108, a second drain pipe 603, and a third drain pipe 604 connected in this order. The first drain pipe 602 is connected to a water outlet of the compressed fluid bladder 601. The third drain pipe 604 is connected to an input port of the liquid spray pipe 605. The top end of the vertically arranged water level display pipe 108 is higher than the top of the water tank 607; the bottom end of the water level display tube 108 is lower than the bottom of the water tank 607. A transparent material pipe used for the water level display tube 108; an observation window is provided in the casing 101 at a position corresponding to the water level display tube 108. Based on the principle of the communicating vessel, the water level of the water level display tube 108 is kept substantially equal to the water level in the water tank 607; therefore, it is possible to judge whether or not the water tank 607 needs to be filled with water by observing the water level of the water level display tube 108. In addition, since the highest position of the water level display pipe 108 in the drain pipe is higher than the water tank 607; so after the compression bladder 601 is stretched; the water level display tube 108 and the water tank form a U-shaped tube structure; the second drain pipe 603 and the third drain pipe 604 have only gas inside. After the next compression of the compression liquid bag 601, the liquid spraying pipe sprays gas and then liquid, so that dust on the surface of the lens is blown off, and cleaning liquid is sprayed to the lens.

As shown in fig. 8, the duct exhaust module includes a main exhaust duct 301, a second suction fan 302, and an exhaust duct 303. The main exhaust pipe 301 is fixed inside the box housing 101; the second suction fan 302 is fixed to the input end of the main exhaust duct 301. The input ends of the two exhaust pipes 303 are respectively connected with the output ends of the main exhaust pipe 301. The output ends of the two exhaust pipes 303 are respectively opened towards the two ends of the detection pipe and are used for driving the gas in the main exhaust pipe 301 to be exhausted. The output ends of the two exhaust pipes 303 are aligned with the two exhaust ports at the bottom of the case housing 101, respectively.

The driving assembly includes a motor 201, a motor support plate 202, a first support hanging plate 203, a second support hanging plate 204, a driving shaft 205, a rotating wheel 206, a pinion 207, a large gear 208, a driven shaft 209, and a transmission rod 210. Two first support hanging plates 203 and two second support hanging plates 204 which are vertically arranged are fixed in the box body shell 101. Two second support hanging plates 204 are provided between the two first support hanging plates 203. Two ends of the driving shaft 205 are respectively and rotatably connected with the two first supporting hanging plates 203. The two driven shafts 209 are respectively rotatably connected between the corresponding first support hanging plate 203 and the second support hanging plate 204. Pinion gears 207 are fixed to both ends of the drive shaft 205. A large gear 208 is fixed on each driven shaft 209. The motor 201 is fixed in the box housing 101 through a motor support plate 202, and an output shaft is fixed to one end of the drive shaft 205 through a coupling. The two pinion gears 207 are meshed with the two large gears 208, respectively. The inner ends of the two driven shafts 209 are coaxially fixed with a rotating wheel 206. One end of the two transmission rods 210 is respectively and rotatably connected with the eccentric positions of the outer sides of the two rotating wheels 206. The other ends of the two transmission rods 210 are respectively and rotatably connected with the wiping slide blocks 211 in the two spraying wiping components. The wiping slide blocks 211 in the two spraying wiping components can be driven to synchronously slide up and down in a reciprocating manner by the rotation of the motor 201.

The operation of the compression ignition engine exhaust gas detection device is as follows (the following description is only a specific case of one detection process, and the exhaust gas detection device provided in this embodiment is not only capable of operating according to the following process):

first, lens cleaning is performed.

In the initial state, the motor 201 is self-locked, the sliding block is positioned at a first limit position, and the transmission rod is positioned at the highest point; the compressed liquid bag is in a normal state and is not pressed. The valve 119 on the drain pipe is opened and the water filling port 608 is closed by the water filling plug 103.

The motor 201 drives the driving shaft 205 to rotate, the driving shaft drives the pinion 207 to rotate, the pinion drives the bull gear 208 to rotate, the bull gear drives the runner 206 to rotate, the runner drives the transmission rod 210 to move, the transmission rod drives the wiping slide block 211 to move downwards, in the downward movement process, the inclined guide post 212 on the wiping slide block is contacted with the inclined hole channel on the guide post slide block 701, the guide post slide block extrudes the compressed liquid bag 601 under the action of the inclined guide post in the downward movement process, the guide rod 704 follows the guide post slide block, the spring 705 is compressed, at the moment, the compressed liquid bag is compressed, the internal pressure rises, water in the compressed liquid bag sequentially flows from the first drain pipe 602, the water level display pipe 108, the second drain pipe 603 and the third drain pipe 604 to the liquid spraying pipe 605, and the cleaning liquid is sprayed from the liquid spraying pipe 605 to the corresponding lens; after the lens sticks to the cleaning solution, the wiper blade on the wiper block contacts the lens surface and the lens wiper block has completely wiped the lens when the drive rod 210 on the wheel 206 reaches the lowermost end.

As the driving shaft is driven by the motor to continue to rotate, the rotating wheel rotates upwards, the sliding block moves upwards under the action of the transmission rod to drive the inclined guide post to move upwards, the guide post sliding block moves inwards under the action of the inclined guide post, and when the inclined guide post and the guide post sliding block are completely separated, the guide post sliding block returns to the original position under the action of the spring 705; negative pressure is generated in the compressed liquid bag, and outside air sequentially passes through the liquid spraying pipe, the third water draining pipe, the second water draining pipe, the water level display pipe and the first water draining pipe to enter the compressed liquid bag; the gas in the compressed liquid bag rises into the water tank; the cleaning liquid in the water tank flows into the compressed liquid bag for supplementing; gas entering the tank 607 through the water injection line 606 reaches the uppermost part of the tank.

Under the rotation of the motor, the rotating wheel continuously rotates for n weeks, and the lens is wiped for n times; in this embodiment, n has a value of 4. In this process, can observe the inside water level condition of box through the water level display tube, after n times, the motor stops rotating, and lens cleaning work is accomplished, and the waste water of cleaning lens flows into the waste water receiver downwards.

Thereafter, preheating of the flue gas duct 116 is performed.

After the lens is cleaned, the heating module rapidly increases the temperature in the flue gas pipeline 116 to a temperature close to the temperature of the exhaust gas of the compression ignition engine, and can rapidly evaporate residual moisture on the lens, so that the pipeline is kept in a dry state, and the heating module is continuously stopped until the exhaust detection is finished.

The engine exhaust is then drawn into the smoke line 116 for detection.

Externally connecting a tested tail gas input port 105 on the surface of the box body with a hose, extending the hose into an exhaust port of a tested engine, rotating a first air suction fan 9, and sucking smoke exhausted by the tested engine into a smoke pipeline 116; after a period of time, the light source generator 4 emits light from the first lens 8 to enter the photoelectric converter 4 through the second ventilation box 110, the flue gas pipeline, the first lens box 111 and the second lens; the photoelectric converter receives the intensity of light passing through the smoke, calculates the light-tight smoke intensity and the ringeman blackness of the smoke exhausted by the tested engine, and judges whether the exhaust of the tested compression ignition engine is qualified or not. The calculation method of the opaque smoke density and the ringeman blackness belongs to the prior art, and is not described herein.

And repeating the process until all the detected engines are detected. In the detection process, if the cleaning liquid in the water tank is insufficient, the valve is closed, the water sealing plug is pulled out, and the cleaning liquid is added into the water injection port. And after the cleaning solution is added, the water sealing plug is plugged again, the valve is opened, and the detection of the smoke discharged by the engine is continued.

Claims (9)

1. A compression ignition engine exhaust gas detection device comprises a box body module and a gas detection module arranged in the box body module; the gas detection module comprises a flue gas pipeline (116), a light source generator (4), a photoelectric converter (5) and a lens (8); the flue gas pipeline (116) is T-shaped and comprises an air inlet pipe and a detection pipe; the output end of the air inlet pipe is communicated with the middle part of the detection pipe; the input end of the air inlet pipe is connected with a tested tail gas input port (105) on the box body module; the light source generator (4) and the photoelectric converter (5) are respectively arranged at two ends of the detection tube; a lens (8) is arranged between the light source generator (4) and the detection tube and between the photoelectric converter (5) and the detection tube; the method is characterized in that: the lens cleaning module is also included;

the lens cleaning module comprises a driving assembly and two spraying wiping assemblies; the two spray wiping components are respectively used for cleaning the two lenses; the spray wiping assembly comprises a sliding wiping assembly and a water spraying assembly; the sliding wiping component comprises a wiping sliding block (211) and wiping cloth (213); the wiping slide block (211) is connected in the box body module in a sliding way; the sliding track of the wiping slide block (211) is positioned between the corresponding lens and the detection tube; one side of the wiping slide block (211) close to the corresponding lens is provided with wiping cloth (213); the position of the wiping cloth (213) corresponds to the position of the lens; the wiping sliding blocks (211) in the two spraying wiping assemblies are driven by the driving assembly to synchronously slide;

the water spraying assembly comprises an inclined guide pillar (212), a compressed liquid bag (601), a drainage pipeline, a liquid spraying pipe (605), a water injection pipeline (606), a water tank (607), a water injection port (608) and an extrusion assembly; the liquid spraying pipe (605) is fixed in the box body module, and the output port is inclined towards the corresponding lens; the water tank (607) is fixed in the tank body module; an input port at the top of the water tank (607) is connected with a water injection port (608) arranged on the tank body module through a water pipe; the water outlet at the bottom of the water tank (607) is communicated with the water inlet at the top of the compressed liquid bag (601) through a water injection pipeline (606); the input port of the spray pipe (605) is connected with the water outlet at the bottom of the compressed liquid bag (601) through a drainage pipeline;

the extrusion assembly comprises a guide pillar sliding block (701); the guide post sliding block (701) is connected in the box body module in a sliding way; one end of the compression liquid bag (601) is fixed with the box body module; the other end of the compression liquid bag (601) is fixed with a guide pillar sliding block (701); an inclined duct is formed at the top of the guide pillar sliding block (701); the inner end of the inclined guide post (212) is fixed with the wiping slide block (211), and the outer end of the inclined guide post (212) is arranged obliquely downwards; the inclined guide pillar (212) is aligned with the guide pillar sliding block (701) along the sliding direction of the wiping sliding block (211) and corresponds to the sliding direction.

2. The exhaust gas detection apparatus for a compression ignition engine according to claim 1, wherein: the driving assembly comprises a motor (201), a motor supporting plate (202), a driving shaft (205), a rotating wheel (206), a pinion (207), a large gear (208), a driven shaft (209) and a transmission rod (210); the driving shaft (205) and the two driven shafts (209) are rotatably connected in the box body module; pinion gears (207) are fixed at both ends of the driving shaft (205); a large gear (208) is fixed on each driven shaft (209); the motor (201) is fixed in the box module through a motor supporting plate (202), and the output shaft is fixed with one end of the driving shaft (205); the two pinions (207) are respectively meshed with the two large gears (208); the inner ends of the two driven shafts (209) are coaxially fixed with a rotating wheel (206); one end of the two transmission rods (210) is respectively and rotatably connected with the eccentric positions of the outer sides of the two rotating wheels (206); the other ends of the two transmission rods (210) are respectively and rotatably connected with the wiping sliding blocks (211) in the two spraying wiping components.

3. The exhaust gas detection apparatus for a compression ignition engine according to claim 1, wherein: the extrusion assembly further comprises a fixing seat (702), a limiting block (703), a guide rod (704) and a spring (705); the fixed seat (702) is fixed in the box body module; the guide post sliding block (701) is connected to the fixed seat (702) in a sliding way; a guide rod (704) is fixed on one side of the guide rod slide block (701) far away from the compressed liquid bag (601); one side of the fixed seat (702) far away from the compressed liquid bag (601) is fixed on the limiting block (703); the guide rod (704) passes through the limiting block (703); the outer end of the guide rod (704) is provided with an annular bulge; a spring (705) is sleeved on the guide rod (704); the two ends of the spring (705) respectively prop against the annular bulges at the outer ends of the limiting block (703) and the guide rod (704).

4. The exhaust gas detection apparatus for a compression ignition engine according to claim 1, wherein: the axis of the inclined guide post (212) and the axis of the inclined duct are in the same vertical plane, and the included angle between the axis of the inclined guide post (212) and the horizontal plane is 2 degrees larger than the included angle between the axis of the inclined duct and the horizontal plane; when the inclined guide post (212) is inserted into the inclined duct, the inclined guide post (212) and the inclined duct form clearance fit; in the initial state, the bottom end of the inclined guide post (212) is positioned right above the top end of the inclined duct.

5. The exhaust gas detection apparatus for a compression ignition engine according to claim 1, wherein: the drainage pipeline comprises a first drainage pipeline (602), a water level display pipe (108), a second drainage pipeline (603) and a third drainage pipeline (604) which are connected in sequence; the first drainage pipeline (602) is connected with a water outlet of the compressed liquid bag (601); the third drainage pipeline (604) is connected with an input port of the liquid spraying pipe (605); the top end of the water level display pipe (108) which is vertically arranged is higher than the top of the water tank (607); the bottom end of the water level display tube (108) is lower than the bottom of the water tank (607); transparent materials adopted by the water level display tube (108); an observation window is arranged at a position on the box body module corresponding to the water level display tube (108).

6. The exhaust gas detection apparatus for a compression ignition engine according to claim 1, wherein: the box body module is also provided with a pipeline exhaust module; the pipeline exhaust module comprises an exhaust main pipeline (301), a second air suction fan (302) and an exhaust pipe (303); the main exhaust pipe (301) is fixed in the box body module; the second air suction fan (302) is fixed at the input end of the main exhaust pipe (301); the input ends of the two exhaust pipes (303) are respectively connected with the output ends of the main exhaust pipe (301); the output ends of the two exhaust pipes (303) are respectively opened towards the two ends of the detection pipe; the output ends of the two exhaust pipes (303) are respectively aligned with the two exhaust ports at the bottom of the box body module.

7. The exhaust gas detection apparatus for a compression ignition engine according to claim 1, wherein: the box module comprises a box shell (101), a box handle (102), a water injection plug (103) and an air suction port (104) which are arranged at the top of the box shell (101), wherein the side part of the box shell (101) comprises a power supply interface, a data transmission interface, a numerical display screen (107), a tested tail gas input port (105) and an air exhaust port and a waste water storage box (109) which are arranged at the bottom of the box shell (101).

8. The exhaust gas detection apparatus for a compression ignition engine according to claim 7, wherein: a supporting seat (117) is fixed in the box body shell (101); the first lens box (111) and the second lens box (110) are fixed on the supporting seat (117); the first lens box (111) is positioned between the photoelectric converter (5) and the detection tube; the second lens box (110) is positioned between the light source generator (4) and the detection tube; two lenses (8) are respectively arranged in a first lens box (111) and a second lens box (110).

9. A compression ignition engine exhaust gas detection apparatus as claimed in any one of claims 1 to 8, wherein: the flue gas pipeline (116) is provided with a heating module (112).

Images