CN112240234B

CN112240234B - Diesel engine with exhaust purification effect for agricultural machinery

Info

Publication number: CN112240234B
Application number: CN202011129392.3A
Authority: CN
Inventors: 芮志英
Original assignee: Anhui Tianwo Heavy Industry Machinery Co ltd
Current assignee: Anhui Tianwo Heavy Industry Machinery Co ltd
Priority date: 2020-10-21
Filing date: 2020-10-21
Publication date: 2021-08-31
Anticipated expiration: 2040-10-21
Also published as: CN112240234A

Abstract

The invention discloses a diesel engine with an exhaust purification effect for agricultural machinery, which comprises a diesel engine body, an air pump and a combustion box, wherein a smoke exhaust pipe is arranged on the diesel engine body, a three-way pipe is fixedly arranged on the smoke exhaust pipe, the other two ports of the three-way pipe are respectively connected with a first guide pipe and a third guide pipe, a first electromagnetic valve is arranged in the middle of the first guide pipe, and a first particle catcher is fixedly arranged at one end, far away from the three-way pipe, of the first guide pipe. Has the advantages that: the exhaust pressure in can be automatic to discharging fume the intraductal to can judge automatically when the exhaust pressure reaches predetermined threshold value that current particle trapper takes place to block up, can automatic switch to another particle trapper work, and carry out automatic recoil clearance to the particle trapper that blocks up, and the clearance is effectual, can make the granule fully burn, thereby reduction diesel engine body exhaust that can be great is to atmospheric pollution.

Description

Diesel engine with exhaust purification effect for agricultural machinery

Technical Field

The invention relates to the field of diesel engines, in particular to a diesel engine with an exhaust purification effect for agricultural machinery.

Background

The diesel engine is widely applied to industries such as industry, agricultural machinery, transportation and the like because of high thermal efficiency and relatively high torque, however, compared with the gasoline engine, the diesel engine has lower HC and CO in waste emission, but has higher NOx and particulate emission, particularly the particulate emission is 30-60 times higher, meanwhile, as the carbon smoke is the main component of the particulate emission of the diesel engine, the carbon smoke usually accounts for 50-80% of the total amount of the particulate, the carbon particles are fine or ultrafine nano-scale carbon smoke particles formed when fuel is combusted under the anoxic condition, and because of small diameter, the carbon particles can be suspended in the atmosphere for a long time without sedimentation, and soluble organic matters such as HC and sulfate adsorbed on the carbon particles are harmful to human bodies. Therefore, the problem of diesel particulate emissions has attracted considerable attention worldwide, and especially with the increasing worsening of environmental issues and tightening of diesel emission regulations, particulate traps are becoming an integral means of reducing diesel emissions.

The particle catcher among the prior art all installs on the blast pipe of diesel engine between, but the particle catcher is along with the accumulation of granule in DPF in the use, diesel engine exhaust backpressure increases gradually, when the backpressure reaches a definite value, can reduce engine dynamic nature and economic nature, nevertheless need dismantle change or regeneration to the particle catcher among the prior art, consequently all need shut down the diesel engine, not only make the diesel engine can not continuous use, moreover because the pipe that discharges fume is very high in the course of the work temperature when dismantling and installing all very troublesome.

An effective solution to the problems in the related art has not been proposed yet.

Disclosure of Invention

The present invention has been made to solve the above-mentioned problems occurring in the prior art, and an object of the present invention is to provide a diesel engine having an exhaust gas purifying effect for agricultural machinery.

In order to achieve the purpose, the invention provides the following technical scheme: a diesel engine with exhaust purification effect for agricultural machinery comprises a diesel engine body, an air pump and a combustion box, wherein a smoke exhaust pipe is arranged on the diesel engine body, a three-way pipe is fixedly arranged on the smoke exhaust pipe, the other two ports of the three-way pipe are respectively connected with a first guide pipe and a third guide pipe, a first electromagnetic valve is arranged in the middle of the first guide pipe, a first particle catcher is fixedly arranged at one end, away from the three-way pipe, of the first guide pipe, a second guide pipe is fixedly arranged at the output end of the first particle catcher, a second electromagnetic valve is arranged in the middle of the second guide pipe, a third electromagnetic valve is arranged in the middle of the third guide pipe, a second particle catcher is fixedly arranged at one end, away from the three-way pipe, of the third guide pipe, a fourth guide pipe is fixedly arranged at the output end of the second particle catcher, and a fourth electromagnetic valve is arranged in the middle of the fourth guide pipe, the output end of the air pump is connected with a preheating box through an air pipe, the lower end of the second guide pipe is connected with one end, far away from the air pump, of the preheating box through a fifth guide pipe, the middle part, close to one end of the second guide pipe, of the fifth guide pipe is provided with a fifth electromagnetic valve, the lower end of the fourth guide pipe is connected with one end, far away from the air pump, of the preheating box through a sixth guide pipe, the middle part, close to one end of the fourth guide pipe, of the sixth guide pipe is provided with a sixth electromagnetic valve, a heating component is arranged in the preheating box, the upper end of the combustion box is provided with an exhaust pipe, one end of the combustion box is fixedly embedded with a rectangular box, the rectangular box is close to one end of the combustion box and is opened, the upper end of the first guide pipe is connected with the outer end of the rectangular box through a seventh guide pipe, the seventh guide pipe is close to the middle part, at one end of the first guide pipe, the seventh guide pipe is provided with a seventh electromagnetic valve, the upper end of the third guide pipe is connected with the outer end of the rectangular box through an eighth guide pipe, the eighth pipe is close to third pipe one end mid-mounting has the eighth solenoid valve, the crisscross fixed a plurality of elastic plates that are equipped with of both ends inner wall about the rectangle case, the fixed a plurality of nozzles that are equipped with of burning bottom end inner wall, just nozzle one side all is equipped with electronic igniter, the nozzle all has the gas jar through ninth pipe connection, the ninth pipe is close to gas jar one end mid-mounting has the ninth solenoid valve, the burning case is kept away from rectangle case one end has the oxygen jar through tenth pipe connection, tenth pipe mid-mounting has the tenth solenoid valve, the pipe mid-mounting of discharging fume has exhaust pressure sensor, the second pipe with fourth pipe upper end all is equipped with silencing device, first solenoid valve the second solenoid valve the third solenoid valve the fourth solenoid valve the fifth solenoid valve the sixth solenoid valve, The seventh solenoid valve the eighth solenoid valve the ninth solenoid valve with the tenth solenoid valve all with treater electric connection, the air pump the electronic fire firearm with exhaust pressure sensor all with treater electric connection, silencing device includes the connecting pipe, the quantity of connecting pipe be two and respectively through coupling assembling with the second pipe with fourth pipe upper end fixed connection, the fixed first amplifier tube that is equipped with on the connecting pipe, the fixed second amplifier tube that is equipped with in first amplifier tube upper end, first amplifier tube with the equal fixed cover of second amplifier tube outer wall is equipped with the insulating layer, the fixed cover of insulating layer outer wall is equipped with the sound-absorbing layer, the fixed puigging that is equipped with of sound-absorbing layer outer wall cover, the fixed protecting crust that is equipped with of puigging outer wall.

Furthermore, the input end of the air pump is fixedly provided with a dust filtering net.

Further, heating element includes the electricity and connects, both ends inner wall symmetry is equipped with a plurality of electricity connectors about the preheating cabinet, corresponds all fixedly between the electricity connector be equipped with the heating wire, the heating wire with treater electric connection.

Further, adjacent all crisscross a plurality of bleeder vents of having seted up of elastic plate, just the elastic plate all inclines to set up.

Further, a first pressure gauge is installed at the upper end of the gas tank, and a first inflating nozzle is installed at one end of the gas tank.

Furthermore, a second pressure gauge is installed at the upper end of the oxygen tank, and a second inflating nozzle is installed at one end of the oxygen tank.

Further, the heat insulation layer is made of rock wool boards, the sound absorption layer is made of sound absorption cotton, and the heat insulation layer is made of glass wool.

Further, coupling assembling includes first ring flange and second ring flange, the connecting pipe lower extreme outer wall is all fixed the cover and is equipped with first ring flange, the second pipe with the fixed cover of fourth pipe upper end outer wall is all fixed the cover and is equipped with the second ring flange, correspond first ring flange with through bolt and nut fixed connection between the second ring flange.

Furthermore, a sealing gasket is arranged between the first flange plate and the second flange plate.

Compared with the prior art, the invention has the following beneficial effects:

(1) according to the invention, by arranging the diesel engine body, the air pump, the combustion box, the rectangular box, the elastic plate, the nozzle, the preheating box, the electronic igniter, the exhaust pressure sensor and the processor, the exhaust pressure in the exhaust pipe can be automatically detected, so that the current particle catcher can be automatically judged to be blocked when the exhaust pressure reaches a preset threshold value, the operation can be automatically switched to another particle catcher, the blocked particle catcher can be automatically backflushed and cleaned, the cleaning effect is good, particles can be fully combusted, the pollution of exhaust gas of the diesel engine body to atmosphere can be greatly reduced, the regeneration of the particle catcher can be completed without stopping the diesel engine body, and the particle catcher is not required to be disassembled, so that the device is very convenient and rapid.

(2) The dust filter net is arranged, so that dust in air can be effectively prevented from entering the air pump.

(3) The electric connector and the electric heating wire are arranged, so that the air sent into the particle catcher can be preheated by utilizing heat generated by the electric heating wire, particles can be more easily separated from the particle catcher and enter the combustion box, and the full combustion of the particles in the combustion box is facilitated.

(4) The ventilation holes are arranged, so that the ventilation efficiency of the elastic plate can be improved, and the consumption of the flowing energy of the airflow can be increased by utilizing the staggered ventilation holes, so that the flow velocity of the airflow can be further reduced, and the particles in the airflow can be fully combusted in the combustion box.

(5) According to the invention, the first pressure gauge and the first inflating nozzle are arranged, so that the pressure value in the gas tank can be detected by using the first pressure gauge, the residual gas quantity in the gas tank can be conveniently judged, and the gas can be supplemented into the gas tank through the first inflating nozzle.

(6) According to the invention, the second pressure gauge and the second charging connector are arranged, so that the pressure value in the oxygen tank can be detected by using the second pressure gauge, the residual amount of oxygen in the oxygen tank can be conveniently judged, and oxygen can be supplemented into the oxygen tank through the second charging connector.

(7) According to the invention, by arranging the silencer, the flow velocity of exhaust gas can be reduced by utilizing the first amplifying pipe and the second amplifying pipe, so that noise generated by airflow can be reduced, the sound-absorbing cotton can absorb partial noise, the glass cotton can block the transmission of the noise, and the rock wool plate can play a heat insulation role, so that the sound-absorbing cotton and the glass cotton can be protected.

(8) The connecting pipe can be detachably fixed with the second guide pipe and the fourth guide pipe together by arranging the first flange and the second flange.

(9) According to the invention, the sealing performance between the first flange plate and the second flange plate can be improved by arranging the sealing washer.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a schematic structural view of a diesel engine with an exhaust gas purifying effect for an agricultural machine according to an embodiment of the present invention;

FIG. 2 is a schematic structural view of a combustion case of a diesel engine having an exhaust gas purifying effect for agricultural machinery according to an embodiment of the present invention;

FIG. 3 is an enlarged view of the structure at A in FIG. 2;

fig. 4 is a block diagram of an electric circuit in a diesel engine having an exhaust gas purifying effect for an agricultural machine according to an embodiment of the present invention;

fig. 5 is a sectional view of a preheating chamber in a diesel engine having an exhaust gas purifying effect for an agricultural machine according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of a silencer in a diesel engine with an exhaust gas purifying effect for an agricultural machine according to an embodiment of the present invention.

Reference numerals:

1. a diesel engine body; 2. an air pump; 3. a combustion box; 4. a smoke exhaust pipe; 5. a three-way pipe; 6. a first conduit; 7. a third conduit; 8. a first solenoid valve; 9. a first particle trap; 10. a second conduit; 11. a second solenoid valve; 12. a third electromagnetic valve; 13. a second particle trap; 14. a fourth conduit; 15. a fourth solenoid valve; 16. a preheating box; 17. a fifth conduit; 18. a fifth solenoid valve; 19. a sixth conduit; 20. a sixth electromagnetic valve; 21. an exhaust pipe; 22. a rectangular box; 23. a seventh conduit; 24. a seventh electromagnetic valve; 25. an eighth conduit; 26. an eighth solenoid valve; 27. an elastic plate; 28. a nozzle; 29. an electronic igniter; 30. a gas tank; 31. a ninth conduit; 32. a ninth electromagnetic valve; 33. a tenth conduit; 34. an oxygen tank; 35. a tenth solenoid valve; 36. an exhaust pressure sensor; 37. a processor; 38. an electrical connector; 39. an electric heating wire; 40. air holes are formed; 41. a first pressure gauge; 42. a first inflation nozzle; 43. a second pressure gauge; 44. a second inflation nozzle; 45. a connecting pipe; 46. a first amplifier tube; 47. a second amplifier tube; 48. a thermal insulation layer; 49. a sound absorbing layer; 50. a sound insulating layer; 51. a protective shell; 52. a first flange plate; 53. a second flange.

Detailed Description

The invention is further described with reference to the following drawings and detailed description:

the first embodiment is as follows:

referring to fig. 1-5, a diesel engine with exhaust purification effect for agricultural machinery according to an embodiment of the present invention includes a diesel engine body 1, an air pump 2 and a combustion box 3, wherein a smoke exhaust pipe 4 is disposed on the diesel engine body 1, a three-way pipe 5 is fixedly disposed on the smoke exhaust pipe 4, two other ports of the three-way pipe 5 are respectively connected to a first conduit 6 and a third conduit 7, a first electromagnetic valve 8 is disposed in the middle of the first conduit 6, a first particle trap 9 is fixedly disposed at one end of the first conduit 6 away from the three-way pipe 5, a second conduit 10 is fixedly disposed at an output end of the first particle trap 9, a second electromagnetic valve 11 is disposed in the middle of the second conduit 10, a third electromagnetic valve 12 is disposed in the middle of the third conduit 7, a second particle trap 13 is fixedly disposed at one end of the third conduit 7 away from the three-way pipe 5, a fourth guide tube 14 is fixedly arranged at the output end of the second particle catcher 13, a fourth electromagnetic valve 15 is arranged in the middle of the fourth guide tube 14, the output end of the air pump 2 is connected with a preheating box 16 through an air tube, the lower end of the second guide tube 10 is connected with one end, far away from the air pump 2, of the preheating box 16 through a fifth guide tube 17, a fifth electromagnetic valve 18 is arranged in the middle of one end, close to the second guide tube 10, of the fifth guide tube 17, the lower end of the fourth guide tube 14 is connected with one end, far away from the air pump 2, of the preheating box 16 through a sixth guide tube 19, a sixth electromagnetic valve 20 is arranged in the middle of one end, close to the fourth guide tube 14, of the sixth guide tube 19, a heating component is arranged in the preheating box 16, an exhaust tube 21 is arranged at the upper end of the combustion box 3, a rectangular box 22 is fixedly embedded at one end of the combustion box 3, and an opening is formed at one end, close to the combustion box 3, the upper end of the first conduit 6 is connected with the outer end of the rectangular box 22 through a seventh conduit 23, the seventh conduit 23 is close to the middle part of one end of the first conduit 6 and is provided with a seventh electromagnetic valve 24, the upper end of the third conduit 7 is connected with the outer end of the rectangular box 22 through an eighth conduit 25, the eighth conduit 25 is close to the middle part of one end of the third conduit 7 and is provided with an eighth electromagnetic valve 26, the inner walls of the upper and lower ends of the rectangular box 22 are fixedly provided with a plurality of elastic plates 27 in a staggered manner, the inner wall of the bottom end of the combustion box 3 is fixedly provided with a plurality of nozzles 28, one side of each nozzle 28 is provided with an electronic igniter 29, each nozzle 28 is connected with a gas tank 30 through a ninth conduit 31, the ninth conduit 31 is close to the middle part of one end of the gas tank 30 and is provided with a ninth electromagnetic valve 32, one end of the combustion box 3, far away from the rectangular box 22, is connected with an oxygen tank 34 through a tenth conduit 33, a tenth electromagnetic valve 35 is installed in the middle of the tenth conduit 33, an exhaust pressure sensor 36 is installed in the middle of the smoke exhaust pipe 4, muffling devices are arranged at the upper ends of the second conduit 10 and the fourth conduit 14, the first electromagnetic valve 8, the second electromagnetic valve 11, the third electromagnetic valve 12, the fourth electromagnetic valve 15, the fifth electromagnetic valve 18, the sixth electromagnetic valve 20, the seventh electromagnetic valve 24, the eighth electromagnetic valve 26, the ninth electromagnetic valve 32 and the tenth electromagnetic valve 35 are electrically connected with a processor 37, and the air pump 2, the electronic igniter 29 and the exhaust pressure sensor 36 are electrically connected with the processor 37.

According to the scheme of the invention, the exhaust pressure in the exhaust pipe 4 can be automatically detected, so that the current particle catcher can be automatically judged to be blocked when the exhaust pressure reaches the preset threshold value, the operation of the other particle catcher can be automatically switched, the blocked particle catcher can be automatically backflushed and cleaned, the cleaning effect is good, particles can be fully combusted, the pollution of the exhaust gas of the diesel engine body 1 to the atmosphere can be greatly reduced, the regeneration of the particle catcher can be completed without stopping the diesel engine body 1, the particle catcher is not required to be disassembled, and the device is very convenient and rapid.

Example two:

referring to fig. 1, 3, 4 and 5, for the air pump 2, a dust filter is fixedly arranged at the input end of the air pump 2; for the heating assembly, the heating assembly includes electrical connectors 38, a plurality of electrical connectors 38 are symmetrically disposed on the inner walls of the upper and lower ends of the preheating box 16, heating wires 39 are fixedly disposed between the corresponding electrical connectors 38, and the heating wires 39 are electrically connected to the processor 37; for the elastic plates 27, a plurality of air holes 40 are formed in the adjacent elastic plates 27 in a staggered manner, and the elastic plates 27 are arranged in an inclined manner.

Through the scheme of the invention, the dust filter screen can effectively prevent dust in the air from entering the air pump 2, and can preheat the air sent into the particle catcher by utilizing the heat generated by the electric heating wire 39, so that the particles can be more easily separated from the particle catcher and enter the combustion box 3, the sufficient combustion of the particles in the combustion box 3 is facilitated, the ventilation efficiency of the elastic plate 27 can be increased by the air holes 40, the consumption of the flowing energy of the air flow can be increased by the staggered air holes 40, the flow rate of the air flow can be further reduced, and the particles in the air flow can be fully combusted in the combustion box 3.

Example three:

referring to fig. 3, for the gas tank 30, a first pressure gauge 41 is installed at the upper end of the gas tank 30, and a first charging connector 42 is installed at one end of the gas tank 30; for the oxygen tank 34, a second pressure gauge 43 is installed at the upper end of the oxygen tank 34, and a second charging connector 44 is installed at one end of the oxygen tank 34.

Through the above scheme of the present invention, the first pressure gauge 41 can be used to detect the pressure value in the gas tank 30, so as to facilitate the determination of the residual amount of the gas in the gas tank 30, and the first charging connector 42 can be used to supplement the gas into the gas tank 30, and the second pressure gauge 43 can be used to detect the pressure value in the oxygen tank 34, so as to facilitate the determination of the residual amount of the oxygen in the oxygen tank 34, and the second charging connector 44 can be used to supplement the oxygen into the oxygen tank 34.

Example four:

referring to fig. 1 and 6, for the silencer, the silencer includes two connecting pipes 45, the two connecting pipes 45 are respectively and fixedly connected to the upper ends of the second conduit 10 and the fourth conduit 14 through connecting assemblies, a first amplifying pipe 46 is fixedly disposed on the connecting pipe 45, a second amplifying pipe 47 is fixedly disposed at the upper end of the first amplifying pipe 46, heat insulating layers 48 are fixedly sleeved on the outer walls of the first amplifying pipe 46 and the second amplifying pipe 47, a sound absorbing layer 49 is fixedly sleeved on the outer wall of the heat insulating layer 48, a sound insulating layer 50 is fixedly sleeved on the outer wall of the sound absorbing layer 49, and a protective shell 51 is fixedly disposed on the outer wall of the sound insulating layer 50; for the insulation layer 48, the insulation layer 48 is made of rock wool board, the sound absorbing layer 49 is made of sound absorbing cotton, and the insulation layer 48 is made of glass wool; for the connection assembly, the connection assembly includes a first flange 52 and a second flange 53, the outer walls of the lower ends of the connection pipes 45 are both fixedly sleeved with the first flange 52, the outer walls of the upper ends of the second conduit 10 and the fourth conduit 14 are both fixedly sleeved with the second flange 53, and the corresponding first flange 52 and the corresponding second flange 53 are fixedly connected through bolts and nuts; for the first flange 52 and the second flange 53, a sealing gasket is arranged between the first flange 52 and the second flange 53.

According to the scheme of the invention, the flow velocity of the exhaust gas can be reduced by utilizing the first amplification pipe 46 and the second amplification pipe 47, so that the noise generated by the airflow can be reduced, the sound absorption cotton can absorb part of the noise, the glass cotton can block the transmission of the noise, the rock wool board can play a heat insulation role so as to protect the sound absorption cotton and the glass cotton, the connecting pipe 45, the second guide pipe 10 and the fourth guide pipe 14 can be detachably fixed together by the first flange plate 52 and the second flange plate 53, and the sealing gasket can increase the sealing performance between the first flange plate 52 and the second flange plate 53.

For the convenience of understanding the technical solutions of the present invention, the following detailed description will be made on the working principle or the operation mode of the present invention in the practical process.

In practical application, firstly, the first particle catcher 9 is used for continuously intercepting particles of the smoke discharged from the smoke discharge pipe 4, at the moment, the first electromagnetic valve 8 and the second electromagnetic valve 11 are in an open state, the other electromagnetic valves are in a closed state, the exhaust pressure sensor 36 in the smoke discharge pipe 4 can detect the pressure of the smoke, when the pressure of the smoke reaches a preset threshold value, the processor 37 judges that the first particle catcher 9 is blocked, at the moment, the processor 37 automatically opens the third electromagnetic valve 12 and the fourth electromagnetic valve 15, then closes the first electromagnetic valve 8 and the second electromagnetic valve 11, the processor 37 can automatically control the air pump 2, the heating wire 39 and the electronic igniter 29 to work, opens the fifth electromagnetic valve 18, the seventh electromagnetic valve 24, the ninth electromagnetic valve 32 and the tenth electromagnetic valve 35, the air pump 2 can be pumped into the preheating tank 16 to be preheated by the heating wire 39 when working, the control after preheating carries out the recoil to first particle trapper 9, can blow into burning box 3 with the granule in the first particle trapper 9, simultaneously, the gas in the gas jar 30 is spout from nozzle 28 and is cooperated electronic igniter 29 can be in nozzle 28 department production flame, thereby can utilize flame to the granule that blows into in burning box 3 burns, oxygen in the oxygen jar 34 can get into burning box 3 makes the burning of granule more abundant, and rectangle case 22 and elastic plate 27 can reduce the velocity of flow that the air that has the granule gets into burning box 3, thereby can make the burning of granule more abundant, thereby can carry out the automatic clearance of length of time of predetermineeing to first particle trapper 9, the same reason can be automatically cleared up second particle trapper 13, the clearance is effectual, can make the granule fully burn, thereby can great reduction diesel engine body 1 exhaust atmospheric pollution, and the regeneration of the particle catcher can be completed without stopping the diesel engine body 1, and the particle catcher is not required to be disassembled, which is very convenient and fast, the dust filter net can effectively prevent dust in the air from entering the air pump 2, and the air sent into the particle catcher can be preheated by utilizing the heat generated by the electric heating wire 39, not only can the particles be more easily separated from the particle catcher to enter the combustion box 3, but also the particles can be favorably and fully combusted in the combustion box 3, the ventilation efficiency of the elastic plate 27 can be increased by the ventilation holes 40, and the consumption of the flowing energy of the air flow can be increased by the staggered ventilation holes 40, so that the flow rate of the air flow can be further reduced, the particles in the air flow can be fully combusted in the combustion box 3, the pressure value in the gas tank 30 can be detected by utilizing the first pressure gauge 41, thereby facilitating the judgment of the residual gas quantity in the gas tank 30, and gas can be replenished into the gas tank 30 through the first gas charging nozzle 42, and the pressure value in the oxygen tank 34 can be detected by the second pressure gauge 43, thereby facilitating judgment of the remaining amount of oxygen in the oxygen tank 34, and supplementing oxygen into the oxygen tank 34 through the second charging connector 44, the flow rate of exhaust gas can be reduced by the first amplification tube 46 and the second amplification tube 47, thereby reducing the noise generated by the airflow, absorbing partial noise by the sound-absorbing cotton, blocking the noise transmission by the glass cotton, insulating heat by the rock wool board, therefore, the sound absorbing cotton and the glass wool can be protected, the connecting pipe 45, the second pipe 10 and the fourth pipe 14 can be detachably fixed together by the first flange plate 52 and the second flange plate 53, and the sealing gasket can increase the sealing performance between the first flange plate 52 and the second flange plate 53.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The diesel engine with the exhaust purification effect for the agricultural machinery is characterized by comprising a diesel engine body (1), an air pump (2) and a combustion box (3), wherein a smoke exhaust pipe (4) is arranged on the diesel engine body (1), a three-way pipe (5) is fixedly arranged on the smoke exhaust pipe (4), the other two ports of the three-way pipe (5) are respectively connected with a first guide pipe (6) and a third guide pipe (7), a first electromagnetic valve (8) is arranged in the middle of the first guide pipe (6), a first particle catcher (9) is fixedly arranged at one end, far away from the three-way pipe (5), of the first guide pipe (6), a second guide pipe (10) is fixedly arranged at the output end of the first particle catcher (9), a second electromagnetic valve (11) is arranged in the middle of the second guide pipe (10), a third electromagnetic valve (12) is arranged in the middle of the third guide pipe (7), a second particle catcher (13) is fixedly arranged at one end, far away from the three-way pipe (5), of the third conduit (7), a fourth conduit (14) is fixedly arranged at the output end of the second particle catcher (13), a fourth electromagnetic valve (15) is arranged in the middle of the fourth conduit (14), the output end of the air pump (2) is connected with a preheating box (16) through an air pipe, the lower end of the second conduit (10) is connected with one end, far away from the air pump (2), of the preheating box (16) through a fifth conduit (17), a fifth electromagnetic valve (18) is arranged in the middle of one end, close to the second conduit (10), of the fifth conduit (17), a sixth electromagnetic valve (20) is arranged in the middle of one end, far away from the air pump (2), of the lower end of the fourth conduit (14) and the preheating box (16) through a sixth conduit (19), and the sixth electromagnetic valve (20) is arranged in the middle of one end, close to the fourth conduit (14), the preheating tank (16) is internally provided with a heating component, the upper end of the combustion tank (3) is provided with an exhaust pipe (21), one end of the combustion tank (3) is fixedly embedded with a rectangular tank (22), the rectangular tank (22) is close to one end opening of the combustion tank (3), the upper end of the first guide pipe (6) is connected with the outer end of the rectangular tank (22) through a seventh guide pipe (23), the seventh guide pipe (23) is close to the middle part of one end of the first guide pipe (6) and is provided with a seventh electromagnetic valve (24), the upper end of the third guide pipe (7) is connected with the outer end of the rectangular tank (22) through an eighth guide pipe (25), the eighth guide pipe (25) is close to the middle part of one end of the third guide pipe (7) and is provided with an eighth electromagnetic valve (26), the inner walls at the upper end and the lower end of the rectangular tank (22) are fixedly provided with a plurality of elastic plates (27) in a staggered manner, and a plurality of nozzles (28) are fixedly arranged on the inner wall at the bottom end of the combustion tank (3), just nozzle (28) one side all is equipped with electronic igniter (29), nozzle (28) all are connected with gas tank (30) through ninth pipe (31), ninth pipe (31) are close to gas tank (30) one end mid-mounting has ninth solenoid valve (32), burning box (3) are kept away from rectangle case (22) one end is connected with oxygen jar (34) through tenth pipe (33), tenth pipe (33) mid-mounting has tenth solenoid valve (35), pipe (4) mid-mounting has exhaust pressure sensor (36) of discharging fume, second pipe (10) with fourth pipe (14) upper end all is equipped with silencing device, first solenoid valve (8), second solenoid valve (11), third solenoid valve (12), fourth solenoid valve (15), fifth solenoid valve (18), sixth solenoid valve (20), The seventh electromagnetic valve (24), the eighth electromagnetic valve (26), the ninth electromagnetic valve (32) and the tenth electromagnetic valve (35) are electrically connected with a processor (37), the air pump (2), the electronic igniter (29) and the exhaust pressure sensor (36) are electrically connected with the processor (37), the silencer comprises two connecting pipes (45), the two connecting pipes (45) are respectively fixedly connected with the upper ends of the second guide pipe (10) and the fourth guide pipe (14) through connecting components, a first amplifying pipe (46) is fixedly arranged on the connecting pipe (45), a second amplifying pipe (47) is fixedly arranged on the upper end of the first amplifying pipe (46), heat insulation layers (48) are fixedly sleeved on the outer walls of the first amplifying pipe (46) and the second amplifying pipe (47), and a sound absorbing layer (49) is fixedly sleeved on the outer wall of the heat insulation layer (48), the outer wall of the sound absorption layer (49) is sleeved with a sound insulation layer (50), and the outer wall of the sound insulation layer (50) is fixedly provided with a protective shell (51).

2. The diesel engine with exhaust purification effect for agricultural machinery according to claim 1, wherein a dust filter is fixedly arranged at the input end of the air pump (2).

3. The diesel engine with exhaust purification effect for agricultural machinery of claim 1, wherein the heating assembly comprises electrical connectors (38), a plurality of electrical connectors (38) are symmetrically arranged on the inner walls of the upper and lower ends of the preheating chamber (16), heating wires (39) are fixedly arranged between the corresponding electrical connectors (38), and the heating wires (39) are electrically connected with the processor (37).

4. The diesel engine with exhaust purification effect for agricultural machinery of claim 1, wherein a plurality of ventilation holes (40) are formed in the adjacent elastic plates (27) in a staggered manner, and the elastic plates (27) are arranged in an inclined manner.

5. The diesel engine with exhaust purification effect for agricultural machinery according to claim 1, wherein a first pressure gauge (41) is installed at an upper end of the gas tank (30), and a first charging nozzle (42) is installed at one end of the gas tank (30).

6. The diesel engine with exhaust purification effect for agricultural machinery of claim 1, wherein a second pressure gauge (43) is installed at the upper end of the oxygen tank (34), and a second charging nozzle (44) is installed at one end of the oxygen tank (34).

7. The diesel engine with exhaust purification effect for agricultural machinery according to claim 1, wherein the heat insulating layer (48) is made of rock wool board, the sound absorbing layer (49) is made of sound absorbing cotton, and the heat insulating layer (48) is made of glass wool.

8. The diesel engine with exhaust purification effect for agricultural machinery according to claim 7, wherein the connecting assembly comprises a first flange (52) and a second flange (53), the outer wall of the lower end of the connecting pipe (45) is fixedly sleeved with the first flange (52), the outer wall of the upper end of the second conduit (10) and the outer wall of the upper end of the fourth conduit (14) are fixedly sleeved with the second flange (53), and the corresponding first flange (52) and the corresponding second flange (53) are fixedly connected through bolts and nuts.

9. The diesel engine having an exhaust gas purifying effect for agricultural machinery according to claim 8, wherein a sealing gasket is provided between the first flange (52) and the second flange (53).