A heat shield welding tool for exhaust gas aftertreatment device

Abstract

The present invention provides a heat insulation cover welding tool for an exhaust gas after-treatment device, which can play a good auxiliary role in welding a heat insulation shell, avoid damaging the heat insulation shell, reduce the difficulty of welding work, and ensure the reliability of welding. The tool comprises a base, and the base is provided with: an after-treatment device positioning mechanism, the after-treatment device positioning mechanism comprises a front positioning seat of the after-treatment device and a rear positioning seat of the after-treatment device, the front positioning seat of the after-treatment device and the rear positioning seat of the after-treatment device are respectively arranged at the front and rear ends of the base, and can cooperate to position the after-treatment device; a heat insulation cover tensioning mechanism, the heat insulation cover tensioning mechanism comprises a positioning ring surrounding the outside of the after-treatment device, a belt is surrounded by an elastic connecting piece and arranged on the inner side of the positioning ring, one end of the belt is fixed on the positioning ring, and the other end of the belt is connected to a tensioning drive mechanism after being extended out of the positioning ring after being surrounded by the inner ring of the positioning ring.

Description

Technical Field

[0001] The invention relates to the technical field of diesel engine exhaust post-processing devices, and in particular to a heat insulation cover welding tool for an exhaust post-processing device. Background Art

[0002] As the fuel of the engine, diesel has the advantages of low cost, high output power, simple combustion system, etc. However, diesel engine emissions not only contain harmful pollutants such as CO, HC, NOx, etc. in gasoline engine emissions, but also particulate matter. The problem of air pollution has attracted global attention, and countries are introducing increasingly stringent emission regulations related to diesel and gasoline engines.

[0003] The existing methods for purifying diesel engine exhaust are to install an exhaust after-treatment device on the exhaust pipe to catalytically oxidize and reduce the nitrogen in the exhaust gas, thereby achieving exhaust purification. Since catalytic oxidation has temperature requirements, the outer cylinder of the diesel engine after-treatment device is designed to be wrapped with a heat insulation cover, and a layer of thermal insulation cotton is glued inside the heat insulation cover to achieve the thermal insulation effect requirements in a manner similar to "wearing a cotton-padded jacket".

[0004] For example, a Chinese invention patent with publication number CN213887949U discloses an insulation shell, also called a heat shield. When the insulation shell is used, it is necessary to weld the insulation shell to the outside of the post-processing device. Currently in production, the insulation shell is usually positioned by mechanical fixation when welding the insulation shell. However, the existing auxiliary equipment is not ideal for positioning the insulation shell. Since the insulation shell is thin, it is easy to damage the insulation shell, which increases the difficulty of welding work and affects the reliability of welding. Summary of the invention

[0005] In view of the above problems, the present invention provides a heat shield welding tool for an exhaust gas aftertreatment device, which can play a good auxiliary role in welding the insulation shell, avoid damaging the insulation shell, reduce the difficulty of welding work, and ensure the reliability of welding.

[0006] The technical solution is as follows: a heat shield welding tool for an exhaust gas post-treatment device comprises a base, on which are provided:

[0007] A post-processing device positioning mechanism, the post-processing device positioning mechanism includes a post-processing device front positioning seat and a post-processing device rear positioning seat, the post-processing device front positioning seat and the post-processing device rear positioning seat are respectively arranged at the front and rear ends of the base, and can cooperate to position the post-processing device;

[0008] The heat shield tensioning mechanism includes a positioning ring surrounding the outside of the post-processing device, a belt is arranged around the inner side of the positioning ring through an elastic connecting piece, one end of the belt is fixed to the positioning ring, and the other end of the belt surrounds the inner circle of the positioning ring for one circle, extends out of the positioning ring and is connected to the tensioning drive mechanism.

[0009] Furthermore, the elastic connecting member is arranged at intervals on the positioning ring, and the elastic connecting member includes a spring connecting seat arranged on the outside of the positioning ring. An avoidance hole is provided on the positioning ring corresponding to the spring connecting seat. One end of the spring is connected to the spring connecting seat, and the other end of the spring is connected to a belt connecting buckle. The belt connecting buckle passes through the avoidance hole and is connected to a connecting belt located on the outside of the belt.

[0010] Furthermore, the positioning ring includes an upper clamp and a lower clamp, one end of the upper clamp and the lower clamp are hingedly connected, and the other ends of the upper clamp and the lower clamp are locked by a locking device.

[0011] Furthermore, the driving mechanism includes a driving motor, the driving motor is connected to a reducer, an output shaft of the reducer is connected to a tensioning wheel, and the belt is connected to the tensioning wheel.

[0012] Furthermore, a fixed shaft is provided in the positioning ring, one end of the belt is fixed on the fixed shaft, a reversing shaft is provided on the other side of the positioning ring symmetrical to the fixed shaft, a belt groove is provided on the positioning ring, the belt extends out from the belt groove after passing through the reversing shaft, and is connected to the tensioning wheel after reversing through the belt reversing wheel.

[0013] Furthermore, the front positioning seat of the post-processing device includes a positioning cavity matching the front end of the post-processing device, and the front end of the post-processing device can be clamped in the positioning cavity. The front positioning seat of the post-processing device also includes a guide rail arranged on the base, and the guide rail is provided with a slider that slides with the guide rail, and the slider is provided with a positioning cavity connecting seat, and the positioning cavity is fixed on the positioning cavity connecting seat.

[0014] Furthermore, a locking groove is provided on the base at one side of the guide rail, and a hinged locking handle is correspondingly provided on the positioning cavity connecting seat, and the locking handle can be clamped in the locking groove.

[0015] Furthermore, the rear positioning seat of the post-processing device includes a positioning card seat that matches the rear end of the post-processing device, and the rear end of the post-processing device can be clamped in the positioning card seat. The rear positioning seat of the post-processing device also includes a positioning card seat base arranged on the base, and the positioning card seat base is provided with a translation rail, and the translation rail is provided with a translation slider that slides with the translation rail, and the translation slider is provided with a positioning card seat connecting plate, and the positioning card seat is fixed on the positioning card seat connecting plate.

[0016] Furthermore, the positioning card seat connecting plate is connected to a driving handle, and the driving handle can drive the positioning card seat connecting plate to move along the translation slide rail.

[0017] Furthermore, a limiting plate is provided on the positioning seat base corresponding to the positioning seat connecting plate.

[0018] Furthermore, auxiliary tightening mechanisms are respectively provided on both sides of the locking device, and the auxiliary tightening mechanisms include adjustable screws arranged toward the post-processing device.

[0019] The heat insulation cover welding tool for the exhaust gas after-treatment device of the present invention is different from the previous method of mechanically fixing the insulation shell. It uses a flexible belt to tension the insulation shell without causing damage to the insulation shell. The driving mechanism can tighten the belt through the tensioning wheel. When the belt is tightened, the belt tightens and positions the insulation shell. At this time, the spring of the elastic connecting part is in a stretched state. After the tensioning wheel is released, the spring returns to a free state and can be separated from the insulation shell. The front positioning seat of the after-treatment device and the rear positioning seat of the after-treatment device can cooperate to quickly position the after-treatment device. By adopting the heat insulation cover welding tool for the exhaust gas after-treatment device of the present invention, the difficulty of welding work can be reduced and the reliability of welding can be ensured. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A stereoscopic view of a heat shield welding tool for an exhaust gas aftertreatment device in an embodiment from a first perspective;

[0021] Figure 2 A stereoscopic view of a heat shield welding tool for an exhaust gas after-treatment device in an embodiment from a second perspective;

[0022] Figure 3 It is a front view of a heat shield welding tool for an exhaust gas post-treatment device in an embodiment;

[0023] Figure 4 A rear view of a heat shield welding tool for an exhaust gas post-treatment device in an embodiment;

[0024] Figure 5 A top view of a heat shield welding tool for an exhaust gas post-treatment device in an embodiment;

[0025] Figure 6 It is a schematic diagram of a heat shield welding tool for an exhaust gas after-treatment device in an embodiment when installing the after-treatment device. DETAILED DESCRIPTION

[0026] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. It should be noted that the illustrations provided in this embodiment only illustrate the basic concept of the present invention in a schematic manner, and the drawings only show components related to the present invention rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout type may also be more complicated.

[0027] See Figures 1 to 6 The heat shield welding tool of the exhaust gas post-treatment device of the present invention comprises a base 100, on which are provided:

[0028] The post-processing device positioning mechanism includes a post-processing device front positioning seat 200 and a post-processing device rear positioning seat 300. The post-processing device front positioning seat 200 and the post-processing device rear positioning seat 300 are respectively arranged at the front and rear ends of the base 100, and can cooperate to position the post-processing device 400;

[0029] The heat shield tensioning mechanism 500 includes a positioning ring 510 surrounding the outside of the post-processing device, a belt 501 surrounding the inner side of the positioning ring 510 through an elastic connecting piece 520, one end of the belt 501 is fixed on the positioning ring 510, and the other end of the belt 501 surrounds the inner circle of the positioning ring 510 for one circle, extends out of the positioning ring, and is connected to the tensioning drive mechanism 530.

[0030] In this embodiment, there are three elastic connecting members 520, which are respectively arranged at intervals on the positioning ring 510. The elastic connecting member 520 includes a spring connecting seat 521 arranged on the outside of the positioning ring 520. The positioning ring 510 is provided with an avoidance hole 511 corresponding to the spring connecting seat 521. One end of the spring 522 is connected to the spring connecting seat 521, and the other end of the spring 522 is connected to a belt connecting buckle 523. The belt connecting buckle 523 passes through the avoidance hole 511 and is connected to the connecting belt 502 located on the outside of the belt 501. When the belt is not tightened, the spring is in a free state, and the belt is pulled toward the side of the positioning ring due to the influence of the belt retraction spring. In this case, the position of the insulation shell 410 on the post-processing device 400 can be conveniently adjusted. After adjustment, the belt can be driven by the tensioning drive mechanism to tighten the insulation shell.

[0031] In this embodiment, the positioning ring 510 includes an upper clamp 512 and a lower clamp 513. One end of the upper clamp 512 and the lower clamp 513 are hingedly connected, and the other end of the upper clamp 512 and the lower clamp 513 are locked by a locking device 514. By setting the positioning ring 510 to an openable state, the post-processing device and the insulation shell can be conveniently placed, and it is also convenient to remove the post-processing device after welding is completed.

[0032] In this embodiment, the driving mechanism 530 includes a driving motor 531, the driving motor 531 is connected to a reducer 532, and the tensioning wheel 533 is connected to the output shaft of the reducer 532.

[0033] A fixed shaft 515 is provided in the positioning ring 510, one end of the belt 501 is fixed on the fixed shaft 515, and a reversing shaft 516 is provided on the other side of the positioning ring 510, which is symmetrical to the fixed shaft 515. Specifically in the present embodiment, the fixed shaft 515 is formed by digging a groove on the upper clamp, and the reversing shaft 516 is formed by digging a groove on the lower clamp at a position symmetrical to the fixed shaft 515. A belt groove 517 is provided on the positioning ring 510 corresponding to the end of the belt 501 extending out of the positioning ring 510. The belt 501 extends out of the belt groove 517 after passing through the reversing shaft 516, and is reversed by the belt reversing wheel 518 and connected to the tensioning wheel 533. The setting of the fixed shaft 515 and the reversing shaft 516 can ensure that the belt 501 will extend out of the positioning ring after making a circle, so as to ensure that the belt tightens the thermal insulation shell over the entire circumference.

[0034] Auxiliary tightening mechanisms are also provided on both sides of the locking device 514, and the auxiliary tightening mechanism includes an adjustable screw 519 arranged toward the post-processing device. The front end of the adjustable screw 519 can be abutted against the insulation shell, which can play an auxiliary positioning role during welding to ensure the positioning effect of the entire insulation shell in the circumferential direction.

[0035] In this embodiment, the front positioning seat 200 of the post-processing device includes a positioning cavity 201 that matches the front end of the post-processing device, and the front end of the post-processing device can be snapped into the positioning cavity 201. The front positioning seat of the post-processing device also includes a guide rail 202 arranged on the base 100, and the guide rail 202 is provided with a slider 203 that slides with the guide rail 202. The slider 203 is provided with a positioning cavity connecting seat 204, and the positioning cavity 201 is fixed on the positioning cavity connecting seat 204; in addition, a locking groove 205 is provided on one side of the guide rail 202 on the base 100, and a hinged locking handle 206 is correspondingly provided on the positioning cavity connecting seat 200, and the locking handle 206 can be snapped into the locking groove 205. Through the cooperation of the locking handle 206 and the locking groove 205, the position of the front positioning seat 200 of the post-processing device can be locked to ensure the positioning effect.

[0036] In this embodiment, the rear positioning seat 300 of the post-processing device includes a positioning card seat 301 that matches the rear end of the post-processing device. In this embodiment, the positioning card seat 301 is composed of three positioning blocks arranged at intervals on the circumference. In other embodiments, more positioning blocks arranged on the circumference can also be used. The rear end of the post-processing device 400 can be clamped in the positioning card seat 301. The rear positioning seat of the post-processing device also includes a positioning card seat base 302 arranged on the base, and a translation slide rail 303 is provided on the positioning card seat base 302, and a translation slide rail 303 is provided on the translation slide rail 303. The translation slider 304 is provided with a positioning card seat connecting plate 305, the positioning card seat 301 is fixed on the positioning card seat connecting plate 305, the positioning card seat connecting plate 305 is connected with a driving handle 306, the driving handle 306 can drive the positioning card seat connecting plate 304 to move along the translation slide rail 303, the driving handle 306 can drive the rear positioning seat 300 of the post-processing device to move along the translation slide rail 303, and the positioning card seat base 302 is provided with a limit plate 307 corresponding to the positioning card seat connecting plate 305, and the limit plate 307 can limit the rear positioning seat 300 of the post-processing device.

[0037] When welding, first put the post-processing device on the positioning seat of the rear positioning seat of the post-processing device, move the rear positioning seat of the post-processing device into place, and then move the front positioning seat of the post-processing device so that the front end of the post-processing device is stuck in the positioning cavity of the rear positioning seat of the post-processing device, and then lock the position of the front positioning seat of the post-processing device through the cooperation of the locking handle and the locking groove to ensure the positioning effect of the post-processing device, and then tighten the belt through the tensioning drive mechanism to tightly bind the insulation shell to the post-processing device, so that the insulation shell can be conveniently welded. After completion, loosen the belt, move the front positioning seat of the post-processing device and the rear positioning seat of the post-processing device in turn, and then take out the welded workpiece.

[0038] The heat insulation cover welding tool for the exhaust gas after-treatment device of the present invention is different from the previous method of mechanically fixing the insulation shell. It uses a flexible belt to tension the insulation shell without causing damage to the insulation shell. The driving mechanism can tighten the belt through the tensioning wheel. When the belt is tightened, the belt tightens and positions the insulation shell. At this time, the spring of the elastic connecting part is in a stretched state. After the tensioning wheel is released, the spring returns to a free state and can be separated from the insulation shell. The front positioning seat of the after-treatment device and the rear positioning seat of the after-treatment device can cooperate to quickly position the after-treatment device. By adopting the heat insulation cover welding tool for the exhaust gas after-treatment device of the present invention, the difficulty of welding work can be reduced and the reliability of welding can be ensured.

[0039] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered exemplary and non-restrictive in all respects, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention.

[0040] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A heat shield welding tool for an exhaust gas aftertreatment device, comprising a base, characterized in that: The base is provided with: A post-processing device positioning mechanism, the post-processing device positioning mechanism includes a post-processing device front positioning seat and a post-processing device rear positioning seat, the post-processing device front positioning seat and the post-processing device rear positioning seat are respectively arranged at the front and rear ends of the base, and can cooperate to position the post-processing device; A heat shield tensioning mechanism, the heat shield tensioning mechanism comprising a positioning ring surrounding the outside of the post-processing device, a belt surrounding the inner side of the positioning ring through an elastic connecting piece, one end of the belt being fixed to the positioning ring, and the other end of the belt being connected to the tensioning driving mechanism after being extended out of the positioning ring after being wrapped around the inner circle of the positioning ring for one circle; The elastic connector is arranged on the positioning ring at intervals, and the elastic connector includes a spring connection seat arranged on the outside of the positioning ring, and a avoidance hole is provided on the positioning ring corresponding to the spring connection seat, one end of the spring is connected to the spring connection seat, and the other end of the spring is connected to a belt connection buckle, and the belt connection buckle passes through the avoidance hole and is connected to the connection belt located on the outside of the belt; The driving mechanism comprises a driving motor, the driving motor is connected to a reducer, and the tensioning wheel is connected to the output shaft of the reducer; A fixed shaft is provided in the positioning ring, one end of the belt is fixed on the fixed shaft, a reversing shaft is provided on the other side of the positioning ring symmetrical to the fixed shaft, a belt groove is provided on the positioning ring, the belt extends out from the belt groove after passing through the reversing shaft, and is connected to the tensioning wheel after being reversed by the belt reversing wheel; The front positioning seat of the post-processing device includes a positioning cavity matching the front end of the post-processing device, the front end of the post-processing device can be clamped in the positioning cavity, the front positioning seat of the post-processing device also includes a guide rail arranged on the base, a slider slidably matched with the guide rail is arranged on the guide rail, a positioning cavity connecting seat is arranged on the slider, and the positioning cavity is fixed on the positioning cavity connecting seat; A locking groove is provided on the base at one side of the guide rail, and a hinged locking handle is correspondingly provided on the positioning cavity connecting seat, and the locking handle can be clamped in the locking groove; The rear positioning seat of the post-processing device includes a positioning seat that matches the rear end of the post-processing device, and the rear end of the post-processing device can be clamped in the positioning seat. The rear positioning seat of the post-processing device also includes a positioning seat base arranged on the base, and a translation rail is provided on the positioning seat base, and a translation slider that slides with the translation rail is provided on the translation rail, and a positioning seat connecting plate is provided on the translation slider, and the positioning seat is fixed on the positioning seat connecting plate.

2. The heat shield welding tool for an exhaust gas post-treatment device according to claim 1, characterized in that: The positioning ring comprises an upper hoop and a lower hoop, one end of the upper hoop and the lower hoop are hingedly connected, and the other ends of the upper hoop and the lower hoop are locked by a locking device.

3. The heat shield welding tool for the exhaust gas post-treatment device according to claim 1, characterized in that: The positioning card seat connecting plate is connected to a driving handle, and the driving handle can drive the positioning card seat connecting plate to move along the translation slide rail. A limiting plate is provided on the positioning card seat base corresponding to the positioning card seat connecting plate.

4. The heat shield welding tool for the exhaust gas post-treatment device according to claim 2, characterized in that: Auxiliary tightening mechanisms are also respectively arranged on both sides of the locking device, and the auxiliary tightening mechanism includes an adjustable screw arranged toward the post-processing device.

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