Device for treating and reducing exhaust gas of motor vehicles

Abstract

The present invention discloses a device for treating and reducing the exhaust gas of a motor vehicle, comprising a catalyst chamber with a transverse annular columnar structure on which a three-way catalyst is installed, a desulfurization chamber with a cone-ring-table structure and a lead removal chamber with an annular columnar structure are sequentially arranged at the left end of the catalyst chamber, fixed flanges are sealed and fixed on the left and right end annular surfaces of the lead removal chamber, the desulfurization chamber and the catalyst chamber, a connecting mechanism is provided on the fixed flange at the left end of the catalyst chamber and the fixed flange is sealed and fixed together with the fixed flange at one end adjacent to the desulfurization chamber through the connecting mechanism, the present invention can conveniently replace the raw materials in the desulfurization chamber and the lead removal chamber, is easy to maintain, and reduces the maintenance cost, so that the desulfurization and lead removal in the engine exhaust gas become feasible in practical applications, and also indirectly improves the purification efficiency of the three-way catalyst and prolongs the service life, and the treated exhaust gas is discharged from the straight pipe muffler at the end of the device to reduce the noise of the motor vehicle.

Description

Technical Field

[0001] The invention belongs to the technical field of motor vehicle exhaust gas treatment, and in particular relates to a device for motor vehicle exhaust gas treatment and noise reduction. Background Art

[0002] At present, exhaust gas treatment usually adopts the secondary air filling combustion method at the front end of the exhaust pipe, that is, a filling hole and a filling pipe are opened near the exhaust pipe end of the cylinder head exhaust hole, so that a large amount of carbon monoxide and hydrocarbons are converted into harmless carbon dioxide and water discharge. However, due to the high temperature of the exhaust gas re-combustion, when the engine works for a long time, this secondary air filling passage will cause the exhaust pipe to age, that is, the exhaust pipe cannot be used for a long time. Moreover, it cannot effectively remove the pollution of nitrogen oxides, and most of the current exhaust gas treatment devices are three-way catalytic converters. The three-way catalytic converter is mainly an exhaust purification device that converts CO, HC, and NOx in the exhaust gas released by the motor vehicle into a gas that is harmless to the human body. However, most of the current technologies ignore the small amount of sulfur and lead contained in the exhaust gas of the motor vehicle. The presence of sulfur will reduce the efficiency of catalytic conversion, and the presence of lead will permanently poison the catalyst in the three-way catalytic converter, thereby making the treatment effect ineffective.

[0003] Moreover, many current studies are mostly devoted to the treatment and purification of automobile exhaust, but the purification of motorcycle exhaust has been ignored. The engine used in motorcycles is an automobile engine, which produces a large amount of exhaust gas when driving, just like automobiles. The existing technology can eliminate the sulfur and lead contained in the exhaust gas by adsorption, but the actual raw material consumption is large. When used, it is filled into the pipe fittings, and the pipe fittings are welded to the three-way catalytic converter or connected together through flange sealing. However, since the raw materials need to be replaced after a period of use, the replacement frequency is high, so it has not been effectively utilized. Summary of the invention

[0004] In view of the defects and problems existing in the existing turbochargers, the present invention provides a device for treating and reducing the noise of motor vehicle exhaust. The device is provided with a desulfurization chamber and a lead removal chamber in front of the three-way catalytic converter to eliminate the sulfur and lead in the engine exhaust gas, and the raw materials in the desulfurization chamber and the lead removal chamber can be easily replaced, thereby making the desulfurization and lead removal in the engine exhaust gas feasible in practical applications.

[0005] The solution adopted by the present invention to solve its technical problems is: a device for treating and reducing the noise of motor vehicle exhaust, comprising a catalyst chamber with a horizontally placed annular columnar structure on which a three-way catalyst is installed, a desulfurization chamber with a conical ring platform structure and a lead removal chamber with an annular columnar structure are sequentially arranged at the left end of the catalyst chamber, fixed flanges are sealed and fixed on the annular surfaces of the left and right ends of the lead removal chamber, the desulfurization chamber and the catalyst chamber, a connecting mechanism is provided on the fixed flange at the left end of the catalyst chamber and is sealed and fixed together with the fixed flange at one end adjacent to the desulfurization chamber through the connecting mechanism, the connecting mechanism comprises a moving flange with a convex ring platform axially provided in the middle part and a wrench ring disk slidably sleeved on the catalyst chamber, the The convex ring stage of the moving flange is sealed and slidably mounted in the left end of the catalyst chamber and can slide left and right along the inner ring wall of the catalyst chamber. A plurality of support rods penetrating the fixed flange at the left end of the catalyst chamber are evenly axially arranged on the flange ring disk of the moving flange along the circumference. The other ends of the support rods are connected to the wrench disk on the catalyst chamber. The support rods can slide axially on the fixed flange. The connecting rods between the moving flange and the fixed flange on the connecting structure are provided with top springs to push the moving flange axially outward. The flange ring disk of the moving flange is sealed and fixed to the fixed flange at the right end of the desulfurization chamber. The lead removal chamber is filled with clinoptilolite, and the desulfurization chamber is filled with an activated carbon deflow tube.

[0006] Furthermore, the left end of the lead removal chamber is sealed and fixedly connected to the exhaust port of the motor vehicle engine through a metal joint.

[0007] Furthermore, the right end of the catalyst chamber is sealed and fixedly connected to a gas buffer chamber, and the other end of the gas buffer chamber is sealed and fixedly connected to a straight tube muffler. The lead removal chamber, desulfurization chamber, catalyst chamber, buffer chamber and straight tube muffler are all coaxially arranged.

[0008] Furthermore, the catalyst in the three-way catalyst is CeO2.

[0009] Furthermore, the length dimension of the connecting rod is a, and the height dimension of the raised ring platform of the moving flange is b, wherein a<b.

[0010] Furthermore, a mounting groove is provided on the circumferential side surface of the top end of the convex ring platform of the movable flange of the connecting mechanism along the circumference, and a sealing ring is sleeved in the mounting groove and radially protrudes out of the mounting groove.

[0011] Furthermore, the outer ring diameter of the fixed flange provided with the connection mechanism is c, and the outer ring diameter of the wrench ring of the connection mechanism is d, wherein d>c.

[0012] Furthermore, a connecting mechanism is provided on the fixed ring disk at the right end of the lead removal chamber and is sealed and connected with an end adjacent to the desulfurization chamber through the connecting mechanism.

[0013] Furthermore, one end of the movable flange on the connecting mechanism at the left end of the catalyst chamber is provided with an axial hole and is hinged to the fixed flange at the left end of the catalyst chamber through a pin.

[0014] Furthermore, four support rods penetrating the fixed ring disk are evenly arranged axially along the circumference of the flange ring disk of the moving flange.

[0015] Beneficial effects of the present invention: The present invention provides a device for treating and reducing the exhaust gas of a motor vehicle, comprising a lead removal chamber, a sulfur removal chamber, a catalyst chamber, a buffer chamber and a straight-tube muffler. The lead removal chamber and the sulfur removal chamber are arranged in front of the catalyst chamber. The lead removal chamber is filled with clinoptilolite to remove lead in the exhaust gas and prevent the lead from permanently poisoning the catalyst of the three-way catalytic converter in the catalyst chamber, thereby rendering the three-way catalytic converter ineffective. The sulfur removal chamber is filled with an activated carbon sulfur removal tube to remove sulfur in the exhaust gas and prevent sulfur from reducing the catalytic conversion efficiency of the three-way catalytic converter. The lead removal chamber, the sulfur removal chamber and the catalyst chamber are connected together by flanges. When the exhaust gas treatment raw materials in the device need to be replaced, it is convenient to disassemble and replace them, so that the device is easy to maintain and the maintenance cost is reduced. In addition, rare earth oxide CeO2 is used as a catalyst in the three-way catalytic converter because CeO2 not only has a good oxygen storage capacity but can also be used as a catalyst to buffer the change of the air-fuel ratio to reduce the economic cost. The treated exhaust gas is discharged through the straight-tube muffler to reduce the noise of the motor vehicle.

[0016] The present invention provides a device for treating motorcycle exhaust gas with noise reduction, which can conveniently replace the raw materials in the desulfurization chamber and the deleading chamber, facilitates maintenance, and reduces maintenance costs, thereby making desulfurization and deleading in engine exhaust gas feasible in practical applications, and indirectly improves the purification efficiency of the three-way catalytic converter and extends its service life. The treated exhaust gas is discharged from the straight-tube muffler at the end of the device, which can reduce the noise of the motor vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is one of the structural schematic diagrams of the present invention.

[0018] Figure 2 yes Figure 1 Schematic diagram of the local cross-section structure.

[0019] Figure 3 It is a schematic diagram of the structure of the movable flange of the present invention.

[0020] Figure 4 It is a schematic diagram of the connecting mechanism structure of the present invention.

[0021] Figure 5 yes Figure 1 Schematic diagram of the disassembly process.

[0022] Figure 6 This is the second structural schematic diagram of the present invention.

[0023] Figure 7 yes Figure 6 Schematic diagram of the disassembly process.

[0024] Figure 8 This is the third structural schematic diagram of the present invention.

[0025] Fig. 9 yes Figure 8 Schematic diagram of the disassembly process.

[0026] Numbers in the figure: 1 is a lead removal chamber, 2 is a desulfurization chamber, 3 is a catalyst chamber, 4 is a buffer chamber, 5 is a straight pipe muffler, 6 is a frame fixing frame, 8 is a fixed flange a, 9 is a fixed flange b, 10 is a fixed flange c, 11 is a fixed flange d, 12 is a moving flange, 13 is a wrench ring, 14 is a connecting rod, 17 is a top spring, 18 is a clinoptilolite, 19 is an activated carbon desulfurization pipe, 20 is a three-way catalytic converter, 21 is a heat insulation and shock absorbing sealing pad, 22 is a stainless steel shell, 23 is a moving flange, 24 is a convex ring platform, 25 is a connecting rod, 27 is a sealing ring a, 28 is a pin, and 29 is a latch. DETAILED DESCRIPTION

[0027] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0028] Example 1

[0029] When motor vehicle engines are working, they produce sulfur and lead, which cause air pollution. At present, motor vehicle exhaust treatment does not effectively deal with these two types of pollution. The use of three-way catalytic converters cannot essentially eliminate sulfur and lead pollution. On the contrary, the accumulation of sulfur and lead will cause the three-way catalytic converter to need regular cleaning. In fact, the cost of raw materials for the adsorption and elimination of sulfur and lead pollution is not high, but the need to regularly replace raw materials will result in a slightly higher replacement frequency. An important reason why the plan to eliminate this pollutant cannot be effectively implemented is the lack of effective technical support, that is, the lack of cheap, feasible and convenient replacement methods, and the lack of necessary enforcement measures for the lack of effective technical means.

[0030] The prior art automobile exhaust emission adopts a three-way catalytic converter which is welded or connected together by flange sealing. This structure is not suitable for eliminating sulfur and lead in the exhaust gas. The raw materials consumed in the sulfur and lead elimination process need to be replaced, so the existing automobile exhaust emission structure needs to be improved.

[0031] This embodiment uses an improved exhaust gas treatment device, which simplifies the elimination of sulfur and lead in engine exhaust gas based on a three-way catalytic converter, and makes raw material replacement very simple, so that desulfurization and deleading in engine exhaust gas become feasible in practical applications. Since the replacement cost and replacement time are reduced, the total cost is not high, and car owners usually consider replacing the corresponding raw materials during maintenance to meet the requirements of the new standard for motor vehicle exhaust gas detection.

[0032] In view of the above problems, the present invention provides a device for treating and reducing the noise of motor vehicle exhaust, such as Figure 1 , Figure 2 As shown, it includes a catalyst chamber 3 with a transverse annular columnar structure installed with a three-way catalyst 20, the middle part of the catalyst chamber 3 is fixedly installed on a fixing seat on the motor vehicle frame, the left end of the catalyst chamber 3 is coaxially provided with a desulfurization chamber 2 with a cone ring-shaped structure and a lead removal chamber 1 with an annular columnar structure, the right side of the catalyst chamber 3 is coaxially provided with a buffer chamber 4 and a straight pipe muffler 5, the left end of the lead removal chamber 1 is sealed and fixed to the exhaust port of the motor vehicle engine through a metal joint, the annular surface at the right end of the lead removal chamber 1 and the annular surface at the left end of the desulfurization chamber 2 are both sealed and welded with a fixed flange a8 protruding radially outward, and the fixed flange a8 at the right end of the lead removal chamber 1 protrudes from the lead removal chamber 1. Four latch holes are evenly opened in the middle of the annular surface of chamber 1 along the circumferential direction. On the fixed flange a8 at the left end of the desulfurization chamber 2, latches are axially arranged at positions corresponding to the latch holes on the fixed flange a8 of the lead removal chamber 1. The inner ring edge of the fixed flange a8 in the latch has an annular mounting groove opened along the circumference and a sealing ring is installed. When the latches on the fixed flange a8 of the desulfurization chamber 2 are inserted into the latch holes on the fixed flange a8 of the lead removal chamber 1 and push the desulfurization chamber 2 to the left, the sealing ring on the fixed flange a8 of the desulfurization chamber 2 will be squeezed and deformed by the fixed flange a8 of the lead removal chamber 1, so that the lead removal chamber 1 and the desulfurization chamber 2 are in a connected and fixed state with the outside sealed and the inside connected.

[0033] The lead removal chamber 1 is filled with clinoptilolite 18, which has a good affinity for lead and is cheap and easily available. The exhaust gas entering the lead removal chamber 1 through the metal joint will be treated with clinoptilolite for lead removal, so that the exhaust gas passing through the lead removal chamber no longer contains lead.

[0034] The diameter of the annular surface at the left end of the desulfurization chamber 2 is smaller than the diameter of the annular surface at the right end of the desulfurization chamber 2. A fixed flange b9 radially protruding from the desulfurization chamber 2 is sealed and welded on the annular surface at the right end of the desulfurization chamber 2. The fixed flange b9 at the right end of the desulfurization chamber 2 protrudes from the annular surface at the right end of the desulfurization chamber. Four pin holes are evenly opened in the middle part of the fixed flange b9 along the circumferential direction. Fixed flanges c10 radially protruding from the catalytic chamber 3 are sealed and welded on the annular surfaces at both ends of the left and right ends.

[0035] like Figure 1 , Figure 3 , Figure 4A push connection mechanism is provided on the fixed flange c10 at the left end of the catalyst chamber 3, and the push connection mechanism includes a dynamic flange 12 with a convex ring platform 24 axially provided in the middle part and a wrench ring plate 13 slidably mounted on the left end of the catalyst chamber 3. The convex ring platform 24 of the dynamic flange 12 is sealingly slidably mounted in the left end of the catalyst chamber 3 and can slide left and right along the inner ring wall of the catalyst chamber 3, and an installation groove is opened along the circumference on the circumferential side surface of the top end of the convex ring platform 24 of the dynamic flange 12, a sealing ring a27 is mounted in the installation groove and the sealing ring a27 radially protrudes from the installation groove, when the convex ring platform 24 of the dynamic flange 12 is sealingly slidably mounted in the catalyst chamber, the sealing ring a27 on the convex ring platform 24 will be squeezed by the convex ring platform and the inner ring wall of the catalyst chamber 3 to produce deformation, thereby enhancing the sealing between the dynamic flange 12 and the catalyst chamber 3.

[0036] A plurality of connecting rods 25 penetrating the fixed flange c10 at the left end of the catalyst chamber 3 are evenly arranged axially on the right end annular surface of the moving flange 23 at the end of the convex ring platform 24 of the moving flange 12 along the circumference, and the other ends of the connecting rods 25 are connected to the spanner ring 13 on the catalyst chamber 3. The connecting rods 25 can slide axially on the fixed flange penetrated. The length dimension of the connecting rod 25 on the moving flange 23 of the moving flange 12 is a, and the height dimension of the convex ring platform 24 on the moving flange 12 is b, wherein a<b; the outer ring length of the fixed flange c10 at the left end of the catalyst chamber 6 is The diameter dimension is c, and the outer ring diameter dimension of the wrench ring 13 on the catalyst chamber 3 is d, wherein d>c, and a top spring 17 is mounted on the connecting rod between the moving flange 12 and the fixed flange c10 at the left end of the catalyst chamber 3. Since the position of the catalyst chamber 3 has been fixed, the top spring 17 will automatically push the moving flange 12 axially to the left. By pushing and pulling the wrench ring 13, the convex ring platform 24 of the moving flange 12 can be controlled to slide right in the catalyst chamber 3, thereby realizing the distance between the moving flange 23 of the moving flange 12 and the fixed flange c10 at the left end of the catalyst chamber 3.

[0037] On the left end surface of the movable flange 23 of the movable flange 12, at the position corresponding to the latch hole on the fixed flange b9 at the right end of the desulfurization chamber 2, a latch 29 is axially arranged to the left. The inner ring edge of the end surface of the movable flange 23 provided with the latch is provided with an annular mounting groove along the circumference and a sealing ring is installed. When the top spring 17 automatically pushes the movable flange 12 axially to the left, the latch on the movable flange will be inserted into the corresponding latch hole on the fixed flange b9 at the right end of the desulfurization chamber 2 and continue to push the movable flange to the left. 23, so that the movable flange 23 is in close contact with the desulfurization chamber 2 and pushes the desulfurization chamber 2 to move to the left, and finally the lead removal chamber 1, the desulfurization chamber 2 and the catalyst chamber 3 are connected and fixed in an externally sealed and internally connected state. The pin on the fixed flange a9 at the right end of the desulfurization chamber 2 and the pin on the push connection mechanism are both provided with external threads. When the lead removal chamber 1, the desulfurization chamber 2 and the catalyst chamber 3 are connected together, nuts are installed on the pins and tightened, which can enhance the connection strength of the lead chamber 1, the desulfurization chamber 2 and the catalyst chamber 3.

[0038] Therefore, when there is no obstacle on the left side of the dynamic flange 12, the top spring 17 will push the dynamic flange to the left to the limit position, that is, the position where the wrench ring plate contacts the fixed flange plate c10 at the left end of the catalyst chamber. Since the height dimension of the convex ring plate 24 of the dynamic flange 12 is greater than the length dimension of the connecting rod 25, the convex ring plate 24 of the dynamic flange 12 will not slide out of the catalyst chamber 3, and when the wrench ring plate 13 contacts the fixed flange plate c10 at the left end of the catalyst chamber 3, since the outer ring diameter dimension of the wrench ring plate 13 is greater than the outer ring diameter dimension of the fixed flange plate c10 at the left end of the catalyst chamber 3, it is convenient to pull the wrench ring plate 13.

[0039] The desulfurization chamber 2 is filled with an activated carbon degassing pipe 19. The activated carbon has a wide source and good stability. The right end sealing sleeve of the three-way catalytic converter 20 in the catalyst chamber 3 is equipped with a heat-insulating and shock-absorbing sealing pad 21. The exhaust gas after the lead removal chamber 1 removes the filtered lead will enter the desulfurization chamber 2 and undergo a secondary treatment. The activated carbon desulfurization pipe 19 in the desulfurization chamber 2 will desulfurize the exhaust gas entering the desulfurization chamber 2, so that the exhaust gas after the treatment in the desulfurization chamber 2 no longer contains sulfur. The exhaust gas after the two treatments enters the catalyst chamber 3 and undergoes a third treatment. Since there is no sulfur and Lead, so the exhaust gas at this time will not affect the catalytic conversion efficiency of the three-way catalytic converter 20 in the catalyst chamber 3, and will not permanently poison the catalyst of the three-way catalytic converter 20 so as to render the treatment effect ineffective; the three-way catalytic converter 20 in the catalyst chamber 3 will convert harmful gases such as CO, HC and NOx in the exhaust gas into harmless carbon dioxide, water and nitrogen, and rare earth oxide CeO2 is used as a catalyst in the three-way catalytic converter 20, because CeO2 not only has good oxygen storage capacity, but also can be used as a catalyst to buffer changes in the air-fuel ratio, so as to reduce economic costs.

[0040] The buffer chamber on the right side of the catalyst chamber 3 is in the shape of a horizontally placed conical ring stage structure, the diameter of the annular surface at the left end of the buffer chamber 4 is larger than the diameter of the annular surface at the right end of the buffer chamber 4, a fixed flange c10 radially protruding from the buffer chamber is sealed and welded on the left end annular surface of the buffer chamber 4, a fixed flange d11 radially protruding from the buffer chamber is sealed and welded on the right end annular surface of the buffer chamber, the air intake end of the straight tube muffler 5 is sealed and welded with a protruding fixed flange d11 of the straight tube muffler 5, the left end face of the fixed flange c10 at the left end of the buffer chamber and the left end face of the fixed flange d11 at the right end of the buffer chamber 4 are both provided with mounting grooves along the circumference at the edge of the inner ring of the flange and are installed with sealing rings, and the fixed flange c10 at the left end of the buffer chamber 4 and the fixed flange c10 at the right end of the catalyst chamber are fixedly and sealedly connected together by bolts and nuts, and the fixed flange d11 at the right end of the buffer chamber 4 and the fixed flange d11 at the left end of the straight tube muffler 5 are fixedly and sealedly connected together by bolts and nuts.

[0041] The exhaust gas treated by the three-way catalytic converter 20 in the catalyst chamber 3 passes through the heat-insulating shock-absorbing sealing pad 21 and enters the buffer chamber. The heat-insulating shock-absorbing sealing pad 21 will perform preliminary deceleration treatment on the exhaust gas before entering the buffer chamber 4. Since the diameter of the annular surface at the left end of the buffer chamber 4 is larger than the diameter of the annular surface at the right end of the buffer chamber 4, the exhaust gas can be subjected to secondary speed reduction treatment. The exhaust gas after the secondary speed reduction treatment enters the straight pipe muffler 5 and is discharged through the straight pipe muffler 5. The straight pipe muffler 5 can effectively reduce the noise emitted by the exhaust gas of motor vehicles.

[0042] The device of this embodiment is applied to the treatment of motorcycle exhaust gas, such as Figure 1 , Figure 5 As shown, the device is first assembled, and then the middle part of the catalyst chamber of the device of this embodiment is installed on the motor vehicle frame fixing frame 6, and then the lead removal chamber 1 of the device of this embodiment is sealed and connected to the exhaust port of the motor vehicle engine through a metal joint.

[0043] When the motor vehicle is started, the exhaust gas discharged by the engine will be processed in turn by the lead removal chamber 1 and the sulfur removal chamber 2 and then enter the catalyst chamber 3. The exhaust gas treated by the catalyst chamber 3 will pass through the buffer chamber 4 and be discharged from the straight pipe muffler 5. Figure 5 As shown, when the raw materials in the lead removal chamber 1 and the desulfurization chamber 2 in the device need to be replaced, first remove all the nuts on the pins on both sides of the desulfurization chamber 2 for enhancing the fixing effect, then pull the wrench ring 13 to the right, the wrench ring 13 drives the driving flange 12 to move to the right, when the pins on the top push connection mechanism at the left end of the catalyst chamber are all moved out of the pin holes of the fixed flange b at the right end of the desulfurization chamber, pull the desulfurization chamber to the right, the pins on the fixed flange a8 at the left end of the desulfurization chamber will be moved out of the pin holes of the fixed flange a8 at the right end of the lead removal chamber 1, now the desulfurization chamber 2 is disassembled, and then the raw materials in the desulfurization chamber 2 and the lead removal chamber 1 can be replaced respectively.

[0044] Example 2

[0045] The difference between Example 2 and Example 1 is that a pin shaft at one end of the desulfurization chamber is hinged with a moving flange of the moving flange.

[0046] like Figure 6 As shown, one end of the fixed flange b9 at the right end of the desulfurization chamber 2 is hinged to one end of the movable flange 23 on the connecting mechanism at the left end of the catalyst chamber 3 through a pin, and the length of the pin is greater than the length of the pin.

[0047] like Figure 7As shown, when it is necessary to replace the raw materials in the lead removal chamber and the desulfurization chamber in the device of this embodiment, first remove all the nuts on the left side pin of the desulfurization chamber 2 for enhancing the fixing effect, then pull the wrench ring 13 to the right, the wrench ring 13 drives the movable flange 12 to move to the right, and the desulfurization chamber 2 will be driven to move to the right when the movable flange moves. When the desulfurization chamber 2 moves to the right, the pins on the fixed flange a8 at the left end of the desulfurization chamber will be moved out of the pin holes of the fixed flange a8 at the right end of the lead removal chamber 1, and then remove all the nuts on the right side pin of the desulfurization chamber 2 for enhancing the fixing effect, and then push the desulfurization chamber 2 to the left, the pins on the fixed flange a8 at the left end of the desulfurization chamber 2 will be moved out of the pin holes of the fixed flange a8 at the right end of the lead removal chamber 1,

[0048] When the pins on the push connection mechanism at the left end of the catalyst chamber are all moved out of the pin holes of the fixed flange b at the right end of the desulfurization chamber, pull the desulfurization chamber to the right, and the pins on the fixed flange a8 at the left end of the desulfurization chamber will be moved out of the pin holes of the fixed flange a8 at the right end of the lead removal chamber 1. At this time, the desulfurization chamber 2 will lose its fixed support and will rotate around the pin shaft 28 hinged with the moving flange 12, so that the desulfurization chamber 2 is separated from the device of this embodiment, and then the raw materials in the lead removal chamber 1 and the desulfurization chamber 2 are replaced respectively. After the replacement is completed, pull the wrench ring to shrink the push connection mechanism inward, and then push the desulfurization chamber 2 to rotate around the pin shaft 28 and remove the desulfurization chamber 2. The pin hole on the fixed flange b9 at the right end is installed on the pin of the moving flange 23 of the pushing connection mechanism, and then the wrench ring is loosened. The top spring on the pushing connection mechanism will automatically push the desulfurization chamber to the left through the moving flange 23, and make the pins on the fixed flange a8 at the left end of the desulfurization chamber 2 inserted into the pin holes on the fixed flange a8 of the lead removal chamber 1 and continue to push the desulfurization chamber 2, finally making the lead removal chamber, desulfurization chamber and catalyst chamber in a connected and fixed state with external sealing and internal penetration, and then install nuts on the pins on the left and right sides of the desulfurization chamber and tighten the nuts, at this time the raw material replacement is completed.

[0049] In this embodiment, since one end of the fixed flange b9 at the right end of the desulfurization chamber 2 is hinged to one end of the movable flange 23 on the connecting mechanism at the left end of the catalyst chamber 3 through the pin 28, it is only necessary to rotate the desulfurization chamber 2 around the pin during installation. The rotation can be operated with one hand, and there is no need to use both hands to grab the desulfurization chamber for installation. Therefore, it is convenient to install the desulfurization chamber after the raw materials are replaced.

[0050] Example 3

[0051] The difference between Example 3 and Example 2 is that a connecting mechanism is also installed on the fixed flange a at the right end of the lead removal chamber.

[0052] like Figure 8 , Fig. 9As shown, a push connection mechanism is provided on the fixed flange a at the right end of the lead removal chamber, and the push connection mechanism includes a movable flange 12 with a convex ring platform 24 axially provided in the middle part and a wrench ring plate 13 slidably mounted on the right end of the lead removal chamber 1. The convex ring platform 24 of the movable flange 12 is sealingly slidably mounted in the left end of the lead removal chamber 1 and can slide left and right along the inner ring wall of the lead removal chamber 1, and a mounting groove is opened along the circumference on the circumferential side surface of the top end of the convex ring platform 24 of the movable flange 12, a sealing ring a27 is mounted in the mounting groove and the sealing ring a27 radially protrudes from the mounting groove, when the convex ring platform 24 of the movable flange 12 is sealingly slidably mounted in the lead removal chamber 1, the sealing ring a27 on the convex ring platform 24 will be squeezed by the convex ring platform and the inner ring wall of the lead removal chamber 1 to produce deformation, thereby enhancing the sealing between the movable flange and the catalyst chamber.

[0053] The left annular surface of the movable flange 23 at the right end of the lead removal chamber 1 is uniformly axially provided with a plurality of connecting rods 25 penetrating the fixed flange a8 at the right end of the lead removal chamber 1, and the other ends of the connecting rods 25 are connected to the wrench ring 13 on the lead removal chamber 1, and the connecting rods 25 can slide axially on the fixed flange penetrated, the length dimension of the connecting rod 25 on the movable flange 23 on the lead removal chamber 1 is a, and the height dimension of the convex ring platform 24 on the movable flange 12 on the lead removal chamber 1 is b, wherein a<b; the outer ring diameter dimension of the fixed flange c10 at the left end of the catalyst chamber 6 is c, and the outer ring diameter dimension of the wrench ring 13 on the catalyst chamber 3 is c. Inch is d, where d>c, a top spring 17 is mounted on the connecting rod between the movable flange 12 on the lead removal chamber 1 and the fixed flange a8 at the right end of the lead removal chamber 1. Since the right end of the lead removal chamber 1 is fixedly connected to the motor vehicle engine through a metal joint, the position of the lead removal chamber 1 has been fixed, so the top spring 17 on the lead removal chamber 1 will automatically push the movable flange 12 axially to the right, and the convex ring platform 24 of the movable flange 12 can be controlled to slide to the left in the lead removal chamber 1 by pulling the wrench ring 13, thereby controlling the distance between the movable flange 23 of the movable flange 12 and the fixed flange c10 at the left end of the catalyst chamber 3.

[0054] The right end ring surface of the movable flange 23 of the movable flange 12 of the desulfurization chamber 1 is provided with a pin hole at a position corresponding to the pin on the fixed flange a8 at the left end of the desulfurization chamber. When installing the desulfurization chamber, first push the wrench ring 13 on the catalyst chamber, rotate the desulfurization chamber 2 around the pin 28, and then move the desulfurization chamber 2 The pin hole on the fixed flange b9 at the right end is installed on the pin of the dynamic flange 23 of the push connection mechanism at the left end of the catalyst chamber, and then the pulled wrench ring 13 is released, and the top spring 17 on the push connection mechanism at the left end of the catalyst chamber 3 will automatically push the desulfurization chamber to the left through the dynamic flange 23, and make the pins on the fixed flange a8 on the left end of the desulfurization chamber 2 are inserted into the corresponding pin holes on the dynamic flange 23 of the push mechanism at the right end of the lead removal chamber 1 and continue to push the desulfurization chamber 2, and finally make the lead removal chamber, the desulfurization chamber and the catalyst chamber in a connected and fixed state with the outside sealed and the inside connected. At this time, the push connection mechanisms at both ends of the desulfurization chamber 2 have a push force on the desulfurization chamber 2, so the connection between the lead removal chamber 1, the desulfurization chamber 2 and the catalyst chamber 3 is tighter, and then nuts are installed on the pins on the left and right sides of the desulfurization chamber 2 and tightened. At this time, the installation of the desulfurization chamber is completed.

Claims

1. A device for treating and reducing the noise of motor vehicle exhaust, comprising a catalyst chamber of a horizontally placed annular columnar structure in which a three-way catalyst is installed, characterized in that: The left end of the catalyst chamber is provided with a desulfurization chamber with a cone ring platform structure and a lead removal chamber with a ring column structure in sequence. The right end of the lead removal chamber, the desulfurization chamber and the left and right end annular surfaces of the catalyst chamber are all sealed and fixed with fixed flanges. A connecting mechanism is provided on the fixed flange at the left end of the catalyst chamber and is sealed and fixed with the fixed flange at one end adjacent to the desulfurization chamber through the connecting mechanism. The connecting mechanism includes a dynamic flange with a convex ring platform axially provided in the middle part and a wrench ring disk slidably mounted on the catalyst chamber. The convex ring platform of the dynamic flange is seal-slidably mounted in the left end of the catalyst chamber and can be moved along the annular surface of the catalyst chamber. The wall slides left and right, and a plurality of support rods penetrating the fixed flange at the left end of the catalyst chamber are uniformly arranged axially on the flange ring disk of the moving flange along the circumference, and the other ends of the support rods are connected to the wrench ring disk on the catalyst chamber. The support rods can slide axially on the fixed flange penetrated, and the connecting rods between the moving flange and the fixed flange on the connecting mechanism are equipped with top springs to push the moving flange axially outward, and the flange ring disk of the moving flange is sealed and fixed to the fixed flange at the right end of the desulfurization chamber, the lead removal chamber is filled with clinoptilolite, and the desulfurization chamber is filled with activated carbon desulfurization tubes; A radially outwardly protruding fixed flange a is sealed and welded on the annular surface at the right end of the lead removal chamber and the annular surface at the left end of the desulfurization chamber. The fixed flange a at the right end of the lead removal chamber protrudes from the middle of the annular surface of the lead removal chamber and has four pin holes evenly opened in the circumferential direction. Pins are axially arranged to the left at positions on the left end surface of the movable flange of the movable flange corresponding to the pin holes on the fixed flange b at the right end of the desulfurization chamber. When the top spring automatically pushes the movable flange axially to the left, the pins on the movable flange will be inserted into the corresponding pin holes on the fixed flange b at the right end of the desulfurization chamber and continue to push the movable flange to the left, so that the movable flange is in close contact with the desulfurization chamber and pushes the desulfurization chamber to move to the left.

2. The device for treating and reducing noise of motor vehicle exhaust according to claim 1, characterized in that: The left end of the lead removal chamber is sealed and fixedly connected to the exhaust port of the motor vehicle engine through a metal joint.

3. The device for treating and reducing noise of motor vehicle exhaust according to claim 1 or 2, characterized in that: The right end of the catalyst chamber is sealed and fixedly connected to a gas buffer chamber, and the other end of the gas buffer chamber is sealed and fixedly connected to a straight tube muffler. The lead removal chamber, desulfurization chamber, catalyst chamber, buffer chamber and straight tube muffler are all coaxially arranged.

4. The device for treating and reducing noise of motor vehicle exhaust according to claim 1, characterized in that: The catalyst in the three-way catalyst is CeO2.

5. The device for treating and reducing noise of motor vehicle exhaust according to claim 1, characterized in that: The length dimension of the connecting rod is a, and the height dimension of the raised ring platform of the moving flange is b, wherein a<b.

6. The device for treating and reducing noise of motor vehicle exhaust according to claim 1, characterized in that: A mounting groove is provided on the circumferential side surface of the top of the convex ring platform of the movable flange of the connecting mechanism along the circumference, and a sealing ring is sleeved in the mounting groove and radially protrudes out of the mounting groove.

7. The device for treating and reducing noise of motor vehicle exhaust according to claim 1, characterized in that: The outer ring diameter size of the fixed flange of the connecting mechanism is c, and the outer ring diameter size of the wrench ring of the connecting mechanism is d, wherein d>c.

8. The device for treating and reducing noise of motor vehicle exhaust according to claim 1 or 7, characterized in that: A connecting mechanism is provided on the fixed flange a at the right end of the lead removal chamber and is sealed and connected with an end adjacent to the desulfurization chamber through the connecting mechanism.

9. The device for treating and reducing noise of motor vehicle exhaust according to claim 1, characterized in that: One end of the movable flange on the connecting mechanism at the left end of the catalyst chamber is provided with an axial hole and is hinged to the fixed flange at the left end of the catalyst chamber through a pin.

10. The device for treating and reducing noise of motor vehicle exhaust according to claim 1, characterized in that: Four support rods penetrating the fixed flange a are evenly arranged axially along the circumference of the flange ring of the moving flange.

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