CN216081225U

CN216081225U - Detection tool for SCR (Selective catalytic reduction) catalytic converter

Info

Publication number: CN216081225U
Application number: CN202122450710.2U
Authority: CN
Inventors: 袁可平; 杨延相; 谈秉乾; 李小智
Original assignee: Wuxi Henghe Ep Tech Co ltd
Current assignee: Wuxi Henghe Ep Tech Co ltd
Priority date: 2021-10-12
Filing date: 2021-10-12
Publication date: 2022-03-18
Anticipated expiration: 2031-10-12

Abstract

The utility model provides a detection tool for an SCR (selective catalytic reduction) catalyst, which has good universality, can be used for detecting SCR catalysts of different models, can reduce the input cost of production equipment and reduce the occupied space of the equipment, and comprises: the supporting mechanism is used for supporting the SCR catalyst; the positioning mechanism comprises a head positioning mechanism and a tail positioning mechanism and is used for positioning the position of the SCR catalyst supported on the supporting mechanism; the angle fixing mechanism is used for positioning the angle of the SCR catalyst; the exhaust temperature sensor mounting seat detection mechanism detects the position of the exhaust temperature sensor mounting seat; the pressure difference sensor mounting seat detection mechanism comprises a mounting seat detection assembly, and the mounting seat detection assembly can detect the position of a pressure difference sensor mounting seat of an SCR (selective catalytic reduction) catalytic converter supported on the supporting mechanism.

Description

Detection tool for SCR (Selective catalytic reduction) catalytic converter

Technical Field

The utility model relates to the technical field of production equipment of diesel vehicle tail gas after-treatment devices, in particular to a detection tool for an SCR (selective catalytic reduction) catalytic converter.

Background

As is well known, diesel engines are becoming more popular because of their higher thermal efficiency, good reliability and durability. At present, national six-emission regulations are executed to strictly limit the particulate matter quality emission, the particulate matter quantity emission and the nitrogen oxide emission of the diesel engine, and the increasingly strict emission regulations force diesel engine manufacturers to add a DOC system and a DPF system on the basis of an SCR system to meet the requirements of new emission regulations.

At present, the rear tail gas post-treatment device of the sixth country comprises three parts: DOC system, DPF system, SCR system, it has connecting piece and sensor mount pad all to weld on every part.

The SCR catalyst mainly comprises a transition cylinder, a mixer and an SCR tail pipe assembly, when the SCR catalyst assembly is assembled, the transition cylinder, the mixer and the SCR tail pipe assembly need to be welded together, the transition cylinder and the mixer are welded firstly, however, when the transition cylinder mixer assembly formed by the transition cylinder and the mixer and the SCR assembly are assembled together, after welding for many times, the actual position of each sensor mounting seat possibly changes compared with the designed position, so that the SCR catalyst after welding needs to be detected, and the consistency and the accuracy of a produced product are ensured.

However, on the SCR catalyst of the rear exhaust gas aftertreatment device, the relative angular positions of the differential pressure sensor mounting seat and the exhaust temperature sensor mounting seat of the SCR catalysts of different models frequently change, and on different products, the differential pressure sensor mounting seat and the exhaust temperature sensor mounting seat are different in the circumferential direction and the axial direction, so that the SCR catalysts of different models cannot be detected by using a universal detection tool.

If all examine utensil to every section SCR catalyst converter die sinking design respectively and establish, then there have input cost height, frock area big, rigging equipment low-usage scheduling problem, at present, need an urgent need a commonality good, can be applicable to the utensil of examining of the SCR catalyst converter of different models.

SUMMERY OF THE UTILITY MODEL

Aiming at the problems, the utility model provides the detection tool for the SCR catalyst, which has good universality, can be used for detecting the SCR catalysts of different models, and can reduce the input cost of production equipment and reduce the occupied space of the equipment.

The technical scheme is as follows: a gauge for an SCR catalyst, comprising:

the supporting mechanism is used for supporting the SCR catalyst;

the positioning mechanism comprises a head positioning mechanism and a tail positioning mechanism, the head positioning mechanism can be matched with a transition cylinder of the SCR catalyst, and the tail positioning mechanism can be matched with an SCR tail pipe assembly of the SCR catalyst to position the position of the SCR catalyst supported on the supporting mechanism;

the angle fixing mechanism can be matched with a nozzle seat of the SCR catalyst to position the angle of the SCR catalyst supported on the supporting mechanism;

the detection mechanism comprises a mounting seat detection assembly, and the mounting seat detection assembly can detect the position of a mounting seat of a temperature exhaust sensor of the SCR catalyst supported on the supporting mechanism;

the pressure difference sensor mounting seat detection mechanism comprises a mounting seat detection assembly, and the mounting seat detection assembly can detect the position of a pressure difference sensor mounting seat of an SCR (selective catalytic reduction) catalytic converter supported on the supporting mechanism.

Further, mount pad detection subassembly includes the direction base, install the telescopic link on the direction base, the front end of telescopic link is equipped with and detects the head with sensor mount pad complex.

Furthermore, the supporting mechanism comprises a plurality of supporting frames fixed on the base, and the supporting frames are matched with the cylinder body of the SCR catalyst; still be provided with locking mechanism on the support frame, locking mechanism include with the articulated locking frame of connecting of support frame, locking frame include with SCR catalyst converter's stack shell assorted arc portion, be connected with operating handle on the locking frame.

Furthermore, head positioning mechanism includes the direction subassembly mounting panel, install the direction subassembly on the direction subassembly mounting panel, the direction subassembly includes complex guide arm and uide bushing, the location apron is installed to the front end of guide arm, the rear end installation drive handle of guide arm, the location apron can stretch into the transition section of thick bamboo of SCR catalyst converter, carries out circumference location with the transition section of thick bamboo complex of SCR catalyst converter, still correspond on the direction subassembly mounting panel the section of thick bamboo wall of the transition section of thick bamboo of SCR catalyst converter is equipped with the stopper.

Further, afterbody positioning mechanism includes afterbody location mounting bracket, install mobilizable afterbody guide arm on the afterbody location mounting bracket, the tail pipe locating sleeve pipe that matches with the tail pipe of SCR catalyst converter is installed to the front end of afterbody guide arm, the afterbody guide arm is connected with the displacement handle.

Furthermore, the angle fixing mechanism comprises a positioning pin fixing seat, a movable positioning pin is installed on the positioning pin fixing seat, the positioning pin can extend into a nozzle seat of the SCR catalyst, a locking clamping block is connected to the rear end of the positioning pin, and a locking clamping groove matched with the locking clamping block is correspondingly arranged on the positioning pin fixing seat.

Furthermore, arrange temperature sensor mount pad detection mechanism and include a plurality of mount pad determine module, every the mount pad determine module corresponds the setting position setting of the row temperature sensor mount pad of the SCR catalyst converter of different models.

Furthermore, the exhaust temperature sensor mounting seat detection mechanism is further provided with a slide rail device, a slide block in sliding fit with the slide rail device is further arranged on the slide rail device, the mounting seat detection assembly is fixed on the slide block, a locking rod in hinged connection is further arranged on the slide block, the exhaust temperature sensor mounting seat detection mechanism further comprises a positioning clamping groove located on one side of the slide block, and the locking rod can be clamped in the positioning clamping groove to lock the position of the slide block.

Further, differential pressure sensor mount pad detection mechanism includes the detection mechanism mounting panel, be equipped with the arc guide rail on the detection mechanism mounting panel, be equipped with on the arc guide rail and follow the gliding slip table of arc guide rail, install mount pad determine module on the slip table, work as the slip table is followed when the arc guide rail slides, mount pad determine module's the detection head is followed SCR catalyst converter circumferential movement on the detection mechanism mounting panel, the set for position of the differential pressure sensor mount pad of the SCR catalyst converter of corresponding different models is provided with a plurality of guide bushings, it is equipped with the locating hole to correspond on the slip table, and the location rises the round pin and passes when guide bushing and locating hole location, can fix a position the set for position of mount pad determine module location at the differential pressure sensor mount pad of one of them SCR catalyst converter.

Further, the slip table is connected through the upset subassembly mount pad determine module, the upset subassembly includes fixed baseplate, the articulated swing arm that is connected with on the fixed baseplate, the front end of swing arm is connected with mount pad determine module.

Further, the arc guide rail is including setting up the first guide rail in the inboard and being located the second guide rail in the outside, the slip table is equipped with a slider and first guide rail cooperation, the slip table is equipped with two sliders and second guide rail cooperation, the detection mechanism mounting panel is connected with the handle, it is provided with the pilot mark to correspond the guide pin bushing on the slip table.

Furthermore, the detection mechanism mounting plate is arranged on the sliding rail assembly, the sliding rail assembly is provided with a sliding block assembly in sliding fit with the sliding rail assembly, the detection mechanism mounting plate is fixed on the sliding block assembly, and the sliding block assembly is further provided with a locking pin for fixing the position of the sliding block assembly.

Furthermore, the differential pressure sensor mounting seat detection mechanism further comprises a second slide rail assembly, a second slide block in sliding fit with the second slide rail assembly is arranged on the second slide rail assembly, the second slide block is connected with the mounting seat detection assembly through a turnover assembly, a second locking rod in hinged connection is further arranged on the second slide block, the differential pressure sensor mounting seat detection mechanism further comprises a second positioning clamping groove located on one side of the second slide block, and the second locking rod can be clamped in the second positioning clamping groove to lock the position of the second slide block.

Further, still include tail pipe assembly sensor mount pad detection mechanism, tail pipe assembly sensor mount pad detection mechanism is including the mount pad detection module that corresponds temperature sensor mount pad, nitrogen oxygen sensor mount pad, PM sensor mount pad setting, and the mount pad detection module that detects the nitrogen oxygen sensor mount pad still is connected with the upset subassembly.

The detection tool for the SCR catalyst is provided with the head positioning mechanism matched with the transition cylinder of the SCR catalyst, the tail positioning mechanism matched with the SCR tail pipe assembly of the SCR catalyst to position the position of the SCR catalyst supported on the supporting mechanism, and after the position of the SCR catalyst on the detection tool is determined, the angle fixing mechanism is matched with the nozzle seat of the SCR catalyst to position the angle of the SCR catalyst, so that the SCR catalyst on the detection tool is fixed at an accurate detection position, the position of each sensor mounting seat can be accurately detected, and the detection reliability is ensured;

aiming at the problem that the relative angle positions of differential pressure sensor mounting seats and exhaust temperature sensor mounting seats of SCR catalysts of different models frequently change, in the checking fixture disclosed by the utility model, the exhaust temperature sensor mounting seat detection mechanism and the differential pressure sensor mounting seat detection mechanism respectively set a plurality of groups of mounting seat detection assemblies for the SCR catalysts of different models, each group of mounting seat detection assemblies can correspondingly detect the SCR catalyst of one model, and whether each sensor mounting seat is assembled at a designed position is detected through the mounting seat detection assemblies, so that one checking fixture can be used for detecting the SCR catalysts of different models, the input cost of production equipment can be reduced, and the floor space of the equipment is reduced.

Drawings

FIG. 1 is a schematic illustration of an SCR catalyst in an embodiment;

FIG. 2 is a schematic diagram of a first view angle of a fixture for an SCR catalyst in an embodiment;

FIG. 3 is a schematic diagram of a second viewing angle of a fixture for an SCR catalyst in an embodiment;

FIG. 4 is a schematic view of a head positioning mechanism and a differential pressure sensor mount detection mechanism of the gauge in an embodiment;

FIG. 5 is a schematic view of another perspective of a head positioning mechanism and a differential pressure sensor mount detection mechanism of the inspection tool in an embodiment;

FIG. 6 is a schematic illustration of a tail positioning mechanism and a tailpipe assembly sensor mount detection mechanism of the gauge in an embodiment;

FIG. 7 is a schematic view of an angle fixing mechanism of the gauge in the embodiment;

FIG. 8 is a schematic view of a exhaust temperature sensor mount detection mechanism of the inspection tool in an embodiment;

FIG. 9 is a schematic view of a differential pressure sensor mount detection mechanism of the gauge in an embodiment;

FIG. 10 is a schematic view of another perspective of a differential pressure sensor mount detection mechanism of the test tool in an embodiment;

FIG. 11 is a schematic diagram of the check tool in the embodiment after an SCR catalyst is installed.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, wherein the drawings provided in the present embodiments illustrate the basic idea of the utility model only in a schematic way, and the components related to the present invention are only shown in the drawings rather than drawn according to the number, shape and size of the components in actual implementation, and the form, number and proportion of the components in actual implementation may be changed freely, and the layout of the components may be more complex.

Referring to fig. 1 to 11, the utility model relates to a testing fixture for an SCR catalyst, comprising: a support mechanism 100 for supporting the SCR catalyst;

the positioning mechanism comprises a head positioning mechanism 200 and a tail positioning mechanism 300, the head positioning mechanism 200 can be matched with the transition cylinder 11 of the SCR catalyst 1, and the tail positioning mechanism 300 can be matched with an SCR tail pipe assembly 12 of the SCR catalyst to position the position of the SCR catalyst supported on the supporting mechanism 100;

the angle fixing mechanism 400 is used for positioning the angle of the SCR catalyst 1 supported on the supporting mechanism 100 by matching the angle fixing mechanism 400 with the nozzle seat 13 of the SCR catalyst;

the exhaust temperature sensor mounting seat detection mechanism 500, the exhaust temperature sensor mounting seat detection mechanism 500 comprises a mounting seat detection assembly 700, and the mounting seat detection assembly 700 can detect the position of an exhaust temperature sensor mounting seat 14 of an SCR catalyst supported on the support mechanism 100;

differential pressure sensor mount detection mechanism 600, differential pressure sensor mount detection mechanism 600 include mount detection assembly 700, and mount detection assembly 700 is able to detect the position of differential pressure sensor mount 15 of the SCR catalyst supported on support mechanism 100.

Specifically, the mounting seat detection assembly 700 includes a guide base 701, an expansion link 702 is installed on the guide base 701, and a detection head 703 matched with each sensor mounting seat is arranged at the front end of the expansion link 702.

In this embodiment, the supporting mechanism includes a plurality of supporting frames 102 fixed on the base 101, and the supporting frames 102 are matched with the cylinder body of the SCR catalyst; wherein, a locking mechanism is further arranged on the supporting frame 102, the locking mechanism comprises a locking frame 103 which is hinged with the supporting frame 102, the locking frame 103 comprises an arc-shaped part 104 which is matched with the cylinder body of the SCR catalyst, and an operating handle 105 is connected on the locking frame.

In this embodiment, head positioning mechanism 200 includes direction subassembly mounting panel 201, install the direction subassembly on the direction subassembly mounting panel 201, the direction subassembly includes complex guide arm 202 and uide bushing 203, location apron 204 is installed to the front end of guide arm 202, location apron 204 presents the shape that matches with the transition section of thick bamboo 11 of SCR catalyst converter, rear end installation actuating handle 205 of guide arm 202, location apron 204 can stretch into in the transition section of thick bamboo 11 of SCR catalyst converter, carry out circumference location with the transition section of thick bamboo 11 complex of SCR catalyst converter, the section of thick bamboo wall that still corresponds the transition section of thick bamboo of SCR catalyst converter on the direction subassembly mounting panel 201 is equipped with stopper 206, stopper 206 can offset with the section of thick bamboo wall of the transition section of thick bamboo of SCR catalyst converter, the realization is fixed a position transition section of thick bamboo one end of SCR catalyst converter.

In this embodiment, the tail positioning mechanism 300 includes a tail positioning mounting frame 301, a movable tail guide rod 302 is mounted on the tail positioning mounting frame 301, a tail positioning sleeve 303 matched with a tail pipe of the SCR catalyst is mounted at the front end of the tail guide rod 302, the tail positioning sleeve 303 can clamp the tail pipe assembly 12 of the SCR catalyst, the tail guide rod 302 is connected with a displacement handle 304, and the tail guide rod 302 is moved to be limited, so as to position one end of the tail pipe assembly of the SCR catalyst.

In this embodiment, the angle fixing mechanism 400 includes a positioning pin fixing seat 401, a movable positioning pin 402 is installed on the positioning pin fixing seat 401, the positioning pin 402 can extend into the nozzle seat 13 of the SCR catalyst, a locking fixture block 403 is connected to the rear end of the positioning pin 402, a locking fixture groove 404 matched with the locking fixture block 403 is correspondingly arranged on the positioning pin fixing seat 401, and after the positioning pin 402 extends into the nozzle seat 13 of the SCR catalyst to complete positioning, the locking fixture block 403 is clamped in the locking fixture groove 404 to perform positioning locking.

The examine utensil for SCR catalyst converter of this embodiment, set up the cooperation of the transition section of thick bamboo of head positioning mechanism and SCR catalyst converter, set up the cooperation of afterbody positioning mechanism and the SCR tail pipe subassembly of SCR catalyst converter, fix a position the position of the SCR catalyst converter of supporting on supporting mechanism, after confirming the position of SCR catalyst converter on examining the utensil again, through the cooperation of the nozzle seat of angle fixed establishment and SCR catalyst converter, fix a position the angle of SCR catalyst converter, thereby ensure that the SCR catalyst converter on examining the utensil is fixed at accurate detection position, thereby can be accurate detect the position to each sensor mount pad, ensure the reliability that detects.

In this embodiment, the exhaust temperature sensor mounting seat detection mechanism 500 includes a plurality of mounting seat detection assemblies 700, and each mounting seat detection assembly 700 is arranged corresponding to a set position of the exhaust temperature sensor mounting seat 14 of an SCR catalyst of different models.

The exhaust temperature sensor mounting seat detection mechanism is further provided with a sliding rail device 501, a sliding block 502 in sliding fit with the sliding rail device 501 is further arranged on the sliding rail device, a mounting seat detection assembly 700 is fixed on the sliding block 502, a locking rod 503 in hinged connection is further arranged on the sliding block 502, the exhaust temperature sensor mounting seat detection mechanism further comprises a positioning clamping groove 504 located on one side of the sliding block, the locking rod 503 can be clamped in the positioning clamping groove 504 to lock the position of the sliding block 502, and the positioning clamping grooves 504 are provided with a plurality of exhaust temperature sensor mounting seats 14, wherein the mounting seat detection assembly 700 corresponds to SCR catalysts of different models.

In this embodiment, the differential pressure sensor mount detection mechanism 600 includes a detection mechanism mounting plate 601, an arc-shaped guide rail 602 is disposed on the detection mechanism mounting plate 601, a sliding table 603 capable of sliding along the arc-shaped guide rail is disposed on the arc-shaped guide rail 602, a mount detection assembly 700 is mounted on the sliding table 603, when the sliding table 603 slides along the arc-shaped guide rail 602, a detection head 703 of the mount detection assembly moves along the circumferential direction of the SCR catalyst 1, a plurality of guide sleeves 604 are disposed on the detection mechanism mounting plate 601 corresponding to set positions of differential pressure sensor mounts 15 of different types of SCR catalysts, a positioning hole 605 is correspondingly disposed on the sliding table 603, and when a positioning tensioning pin 606 passes through the guide sleeves 604 and the positioning hole 605 for positioning, the mount detection assembly 700 can be positioned at the set position of the differential pressure sensor mount 15 of one type of the SCR catalysts, so that the mount detection assembly 700 can detect the position of the differential pressure sensor mount 15, in this embodiment, the guide sleeve 604 is disposed on the detection mechanism mounting plate 601, so as to be compatible with multiple types of SCR catalysts, the detection mechanism mounting plate is connected with a handle 614, and the sliding table is provided with an indication mark 615 corresponding to the guide sleeve 604.

Specifically, the sliding table 603 is connected with the mounting seat detection assembly 700 through the turnover assembly 800, the turnover assembly comprises a fixed base 801, a swing arm 802 is hinged to the fixed base 801, the front end of the swing arm 802 is connected with the mounting seat detection assembly 700, the turnover assembly 800 can realize 90-degree turnover, the turnover is in place during detection, and the turnover is 90 degrees to avoid the SCR catalyst when the SCR catalyst is taken out; the mounting seat detection assembly 700 is mounted on the overturning assembly 80, and a detection head of the mounting seat detection assembly 700 can move up and down;

in this embodiment, the arc-shaped guide rail 602 includes a first guide rail 6021 disposed inside and a second guide rail 6022 disposed outside, the sliding table 603 is provided with a sliding block to cooperate with the first guide rail 6021, and the sliding table is provided with two sliding blocks to cooperate with the second guide rail 6022, so as to ensure that the inner and outer sliding blocks rotate synchronously and circumferentially.

In this embodiment, the detection mechanism mounting plate 601 is disposed on the slide rail assembly 607, a slide block assembly 608 slidably engaged with the slide rail assembly 607 is disposed on the slide rail assembly 607, the detection mechanism mounting plate 601 is fixed on the slide block assembly 608, and a locking pin 609 is further disposed on the slide block assembly 608 for fixing the position of the slide block assembly 608.

For the size difference of SCR catalysts with different models, for this reason, the sliding rail assembly 607 is designed on the detection mechanism mounting plate 601, and the axial position can be adjusted by moving the differential pressure sensor mounting seat detection mechanism 600 through the sliding rail assembly 607, so as to adapt to the SCR catalysts with different models.

In addition, the tail pipe assembly sensor mounting seat detection mechanism 900 is further included, the tail pipe assembly sensor mounting seat detection mechanism comprises a mounting seat detection assembly 700 which is arranged corresponding to the temperature sensor mounting seat 16, the nitrogen oxygen sensor mounting seat 17 and the PM sensor mounting seat 18, the mounting seat detection assembly 700 for detecting the nitrogen oxygen sensor mounting seat is further connected with an overturning assembly 800, the positions of the temperature sensor mounting seat 16, the nitrogen oxygen sensor mounting seat 17 and the PM sensor mounting seat 18 on the tail pipe assembly are fixed, and therefore detection can be carried out only by comparing the mounting seat detection assembly 700 which is arranged at a fixed angle with the SCR catalyst after positioning is completed.

In an embodiment of the present invention, the differential pressure sensor mount detection mechanism further includes a second slide rail assembly 610, a second slider 611 slidably engaged with the second slide rail assembly 610 is disposed on the second slide rail assembly 610, the second slider 611 is connected to the mount detection assembly 700 through the flipping assembly 800, a second locking lever 612 hinged to the second slider 611 is further disposed on the second slider 611, and the differential pressure sensor mount 15 further includes a second positioning slot 613 located on one side of the second slider 611, and the second locking lever 612 can be clamped in the second positioning slot 613 to lock a position of the second slider, so as to adapt to differential pressure sensor mounts 15 of SCR catalysts of more models.

Aiming at the problem that the relative angle positions of differential pressure sensor mounting seats and exhaust temperature sensor mounting seats of SCR catalysts of different models frequently change, in the detection tool, a detection mechanism of the exhaust temperature sensor mounting seat and a detection mechanism of the differential pressure sensor mounting seat are respectively provided with a plurality of groups of mounting seat detection assemblies for the SCR catalysts of different models, and each group of mounting seat detection assemblies can correspondingly detect one type of SCR catalyst, so that one detection tool can realize detection of a plurality of sets of products; the space is saved, and the production efficiency is improved; compared with the traditional checking fixture, the checking fixture is better in compatibility, more economical and cost-saving.

It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. A gauge for an SCR catalyst, comprising:

the supporting mechanism is used for supporting the SCR catalyst;

the pressure difference sensor mounting seat detection mechanism comprises a mounting seat detection assembly, and the mounting seat detection assembly can detect the position of a pressure difference sensor mounting seat of an SCR (selective catalytic reduction) catalytic converter supported on the support mechanism;

the mounting seat detection assembly comprises a guide base, a telescopic rod is mounted on the guide base, and a detection head matched with the sensor mounting seat is arranged at the front end of the telescopic rod.

2. The check tool for the SCR catalyst of claim 1, wherein: the supporting mechanism comprises a plurality of supporting frames fixed on the base, and the supporting frames are matched with the cylinder body of the SCR catalyst; still be provided with locking mechanism on the support frame, locking mechanism include with the articulated locking frame of connecting of support frame, locking frame include with SCR catalyst converter's stack shell assorted arc portion, be connected with operating handle on the locking frame.

3. The check tool for the SCR catalyst of claim 1, wherein: head positioning mechanism includes the direction subassembly mounting panel, install the direction subassembly on the direction subassembly mounting panel, the direction subassembly includes complex guide arm and uide bushing, the location apron is installed to the front end of guide arm, the rear end installation actuating handle of guide arm, during the transition section of thick bamboo that the location apron can stretch into the SCR catalyst converter, carry out circumference location with the transition section of thick bamboo complex of SCR catalyst converter, still correspond on the direction subassembly mounting panel the section of thick bamboo wall of the transition section of thick bamboo of SCR catalyst converter is equipped with the stopper.

4. The check tool for the SCR catalyst of claim 1, wherein: the tail positioning mechanism comprises a tail positioning mounting frame, a movable tail guide rod is mounted on the tail positioning mounting frame, a tail pipe positioning pipe sleeve matched with a tail pipe of the SCR catalyst is mounted at the front end of the tail guide rod, and the tail guide rod is connected with a displacement handle.

5. The check tool for the SCR catalyst of claim 1, wherein: the angle fixing mechanism comprises a positioning pin fixing seat, a movable positioning pin is installed on the positioning pin fixing seat, the positioning pin can stretch into a nozzle seat of the SCR catalytic converter, a locking clamping block is connected to the rear end of the positioning pin, and a locking clamping groove matched with the locking clamping block is correspondingly formed in the positioning pin fixing seat.

6. The check tool for the SCR catalyst of claim 1, wherein: arrange temperature sensor mount pad detection mechanism and include a plurality of mount pad determine module, every the mount pad determine module corresponds the exhaust temperature sensor mount pad's of the SCR catalyst converter of different models settlement position setting.

7. The check tool for the SCR catalyst of claim 6, wherein: the detection mechanism of the exhaust temperature sensor mounting seat is further provided with a slide rail device, a slide block in sliding fit with the slide rail device is further arranged on the slide rail device, the mounting seat detection assembly is fixed on the slide block, a locking rod in hinged connection is further arranged on the slide block, the detection mechanism further comprises a positioning clamping groove located on one side of the slide block, and the locking rod can be clamped in the positioning clamping groove to lock the position of the slide block.

8. The check tool for the SCR catalyst of claim 1, wherein: pressure differential sensor mount pad detection mechanism includes the detection mechanism mounting panel, be equipped with the arc guide rail on the detection mechanism mounting panel, be equipped with on the arc guide rail and follow the gliding slip table of arc guide rail, install mount pad determine module on the slip table, work as the slip table is followed when the arc guide rail slides, mount pad determine module's detection head is followed SCR catalyst converter circumference removes on the detection mechanism mounting panel, the pressure differential sensor mount pad that corresponds the SCR catalyst of different models sets for the position, is provided with a plurality of guide pin casings, correspond on the slip table and be equipped with the locating hole, the location tight round pin that rises passes when guide pin casing and locating hole location, can fix a position the setting for the position of mount pad determine module at the pressure differential sensor mount pad of one of them SCR catalyst.

9. The check tool for the SCR catalyst of claim 8, wherein: the sliding table is connected with the mounting seat detection assembly through the overturning assembly, the overturning assembly comprises a fixed base, a swing arm is hinged to the fixed base, and the front end of the swing arm is connected with the mounting seat detection assembly.

10. The check tool for the SCR catalyst of claim 8, wherein: the arc guide rail is including setting up the first guide rail in the inboard and being located the second guide rail in the outside, the slip table is equipped with a slider and first guide rail cooperation, the slip table is equipped with two sliders and second guide rail cooperation, the detection mechanism mounting panel is connected with the handle, it is provided with the pilot mark to correspond the guide pin bushing on the slip table.

11. The check tool for the SCR catalyst of claim 8, wherein: the detection mechanism mounting plate is arranged on the sliding rail assembly, the sliding rail assembly is provided with a sliding block assembly in sliding fit with the sliding rail assembly, the detection mechanism mounting plate is fixed on the sliding block assembly, and the sliding block assembly is further provided with a locking pin for fixing the position of the sliding block assembly.

12. The check tool for the SCR catalyst of claim 9, wherein: the differential pressure sensor mounting seat detection mechanism further comprises a second slide rail assembly, a second slide block in sliding fit with the second slide rail assembly is arranged on the second slide rail assembly, the second slide block is connected with the mounting seat detection assembly through a turnover assembly, a second locking rod in hinged connection is further arranged on the second slide block, the differential pressure sensor mounting seat detection mechanism further comprises a second positioning clamping groove located on one side of the second slide block, and the second locking rod can be clamped in the second positioning clamping groove to lock the position of the second slide block.

13. The check tool for the SCR catalyst of claim 9, wherein: still include tail pipe assembly sensor mount pad detection mechanism, tail pipe assembly sensor mount pad detection mechanism is including the mount pad detection module that corresponds temperature sensor mount pad, nitrogen oxygen sensor mount pad, PM sensor mount pad setting, and the mount pad detection module that detects the nitrogen oxygen sensor mount pad still is connected with the upset subassembly.