CN212321019U - Automatic detection platform for oil tank leakage and leakage point coloring identification - Google Patents

Abstract

The utility model discloses an automatic platform that examines of colored discernment of oil tank seepage and leak source mainly includes: the device comprises a positioning support mechanism, a routine tightness inspection mechanism, a liquid spraying and cleaning device, a missing point identification and marking device and additional components; the positioning support mechanism supports and positions the oil tank and adjusts the welding seam detection surface; the routine tightness inspection mechanism performs leakage detection on the oil tank by adopting a differential pressure method and judges whether a welding line of the oil tank has defects; the liquid spraying and cleaning device is used for carrying out detection liquid spraying and cleaning wiping on the welding seam; the missing point identification and marking device automatically identifies the weld joint and marks the position of the defect; the longmen of additional subassembly mainly provides support and location for motor, screw nut and the installation of the annex of connecting on it, and the stock solution subassembly supplies with required detection liquid for liquid injection and cleaning device, the utility model discloses can realize that automatic detection, the identification mark of car oil tank welding seam defect position provide the basis for the automatic detection of car oil tank seepage.

Description

Automatic detection platform for oil tank leakage and leakage point coloring identification

Technical Field

The utility model relates to a welding seam leak source detects technical field, concretely relates to automatic platform that detects of painted discernment of oil tank seepage and leak source.

Background

The commercial vehicle oil tank is formed by welding metal plates widely, and the welding seam leakage defect is difficult to avoid in the welding process, so that the oil tank leaks oil, and the use safety of a vehicle is seriously affected. Therefore, in order to ensure the sealing performance of the oil tank, oil tank manufacturers must perform routine inspection on the sealing performance of oil tank products, perform leak point identification on the detected oil tank with poor sealing performance, and perform targeted repair welding on the oil tank with poor sealing performance to ensure 100% sealing integrity of the oil tank products. Most of the traditional oil tank welding seam leakage detection adopts a bubble detection method, mainly depends on manual detection, has low detection precision and low speed, and has great influence on production environment; most advanced detection technologies can effectively improve detection accuracy, but equipment cost is high.

In order to realize high-efficient, accurate, intelligence, the detection that integrates of car oil tank leakproofness, it is low to solve prior art degree of automation, and detect the precision and detect the problem in the aspects such as cost, the utility model provides an automatic platform of examining of painted discernment of oil tank seepage and leak source, adopt the differential pressure method to carry out routine inspection to the oil tank leakproofness, judge whether there is the leakage defect in the oil tank welding seam, adopt the painted penetration method to realize the leak source discernment to the oil tank that has the leakage defect, and carry out the automatic marking to the leak source, effectively show oil tank welding seam surface defect, the going on of the follow-up repair welding process of being convenient for, provide the basis for the automated inspection of car oil tank seepage.

SUMMERY OF THE UTILITY MODEL

In order to solve the above problems, the utility model provides an automatic detection platform of colored discernment of oil tank seepage and leak source, the oil tank that uses certain type commercial car to be equipped with is the detection case, and the leak source discernment object is the straight welding seam of oil tank wall centre, two class circumferential weld of the terminal surface department near the oil tank both sides, a complicated shape welding seam of oil inlet and oil tank box intersection, adopts automatic oil tank supply line and location supporting mechanism to realize that the oil tank is automatic from top to bottom, utilizes the routine inspection mechanism of oil tank leakproofness to carry out routine seepage detection to the oil tank, judges whether there is the defect in the oil tank welding seam, and the leak source detection adopts the colored penetrant inspection method with the discernment, discerns the defective position of oil tank welding seam and marks it, is convenient for going on of follow-up repair welding process, the utility model discloses can realize the routine inspection of car oil tank leakproofness, the automatic detection and the discernment, The automatic marking of the leakage point has high detection precision and efficiency, can effectively show the weld surface defects of the oil tank, and provides a foundation for the automatic detection of the leakage of the automobile oil tank.

In order to realize above-mentioned purpose, an automatic platform that examines of colored discernment of oil tank seepage and leak source, mainly include: the device comprises a positioning support mechanism 1, a routine tightness inspection mechanism 2, a liquid spraying and cleaning device 3, a missing point identification and marking device 4 and an additional component 5; the positioning and supporting mechanism 1 supports and positions the oil tank and adjusts the welding seam detection surface of the oil tank; the routine tightness checking mechanism 2 performs leakage detection on the oil tank by adopting a differential pressure method to judge whether the welding seam of the oil tank has defects; the liquid spraying and cleaning device 3 can be used for independently or simultaneously spraying, cleaning and wiping cleaning liquid, penetrating liquid and developing solution on the welding seam, and carrying out pretreatment for the leakage point identification work; the missing point identification and marking device 4 is used for carrying out image acquisition and missing point identification on the welding seam and automatically marking the position of the defect; the gantry of the additional component 5 mainly provides support and positioning for the installation of a motor, a screw nut and accessories connected with the screw nut, the motor and the screw nut provide guidance for the linear motion of the liquid ejecting and cleaning device 3 and the leak point identifying and marking device 4, and the liquid storage component 5-8 provides detection liquid such as required cleaning liquid, penetrating liquid, developing liquid and the like for the liquid ejecting and cleaning device 3;

the positioning support mechanism 1 comprises: the device comprises a left side positioning clamp 1-1, a right side positioning clamp 1-2, a supporting telescopic cylinder 1-3 and a detection table base 1-4; the upper surfaces of the detection table bases 1-4 are provided with notches, so that the required space size is provided for later detection, and detection liquid is recovered; the left side positioning clamp 1-1 and the right side positioning clamp 1-2 are respectively connected with a detection table base 1-4 through a first bearing slide rail 1-1-4 and a second bearing slide rail 1-2-5 in a threaded connection mode, and a supporting telescopic cylinder 1-3 is connected in an open slot of the detection table base 1-4 through a bolt; the positioning support mechanism 1 and the longitudinal central plane of the oil tank to be detected are positioned on the same plane, and the two supporting telescopic cylinders 1-3 are symmetrically arranged relative to the transverse central plane of the detection platform base 1-4 to provide vertical support and displacement for the oil tank; the left side positioning jig 1-1 includes: the device comprises a first motor 1-1-1, a first supporting seat 1-1-2, a first lead screw 1-1-3, a first bearing slide rail 1-1-4, a chuck rotating motor 1-1-5, a chuck supporting seat 1-1-6, a power chuck 1-1-7 and a left oil tank stop block 1-1-8; the power chuck 1-1-7 comprises: the positioning claw type gear comprises a front end cover A, a positioning claw telescopic motor B, a driving bevel gear C, a driven gear D, a positioning claw E and a rear end cover F; the central lines of the front end cover A, the driven gear D and the rear end cover F are superposed and are connected through a friction sleeve; the positioning clamping jaw E is connected with the front end cover A in a nested mode through a surface slideway, and can only move in the radius direction; the chuck rotating motor 1-1-5, the power chuck 1-1-7 and the left oil tank stop dog 1-1-8 are supported on the upper part of the chuck support 1-1-6 through bearings, the first motor 1-1-1 provides power for the first lead screw 1-1-3, and the first lead screw 1-1-3 is connected with the chuck support 1-1-6 through threads, so that the chuck support 1-1-6 makes linear motion, and the power chuck 1-1-7 and the left oil tank stop dog 1-1-8 are driven to make transverse horizontal linear motion; the extending part of the output shaft of the chuck rotating motor 1-1-5 is supported by a chuck support 1-1-6 through a pair of bearings, one end of the output shaft is connected with a shell key of the power chuck 1-1-7, the other end of the output shaft is connected with a left oil tank stop block 1-1-8 through a coupler, and the chuck rotating motor 1-1-5 is started to enable the output shaft to rotate, so that the power chuck 1-1-7 and the left oil tank stop block 1-1-8 are driven to synchronously rotate, and the integral rotation of an oil tank is realized; the driving bevel gear C is meshed with one side bevel gear of the external driven gear D, the other side of the driving bevel gear C is provided with a spiral bulge which is meshed with a spiral groove at the back of the positioning claw E, and the power of the positioning claw telescopic motor B is transmitted to the positioning claw E through the two-stage transmission, so that the stretching or the contraction movement of the four positioning claws E is realized; the right positioning jig 1-2 includes: a second motor 1-2-1, a second motor support 1-2-2, a second lead screw 1-2-3, a second support seat 1-2-4, a second bearing slide rail 1-2-5, a right oil tank stop block 1-2-6, a stop block support 1-2-7 and a right clamp mounting seat 1-2-8; the second lead screw 1-2-3 is connected with the stop block support 1-2-7 through threads, and the second motor 1-2-1 provides power for the second lead screw 1-2-3, so that the oil tank stop block is driven to transversely and horizontally move linearly; the right oil tank stop block 1-2-6 is supported at the upper part of the stop block support 1-2-7 through a bearing, can freely rotate relative to the stop block support 1-2-7, and can move left and right through a second support seat 1-2-4 to clamp and release the oil tank left and right; the inner end surfaces of the left oil tank stop block 1-1-8 and the right oil tank stop block 1-2-6 are curved surfaces and are matched with the center of the end surface of the oil tank in shape; when an oil tank is loaded, the supporting telescopic cylinder 1-3 lifts the supporting oil tank upwards, the positioning clamping jaws E stretch outwards, the left positioning clamp 1-1 and the right positioning clamp 1-2 move inwards along the first lead screw 1-1-3 and the second lead screw 1-2-3 respectively in the transverse direction until the inner surface of the stop block is attached to the oil tank, the positioning clamping jaws E contract inwards to clamp the oil tank, and the position of the oil tank is fixed; when the oil tank needs to be rotated, the supporting telescopic cylinder 1-3 retracts downwards to prevent movement interference, the power chuck 1-1-7 integrally rotates for a certain angle under the driving of the motor, the oil tank stop blocks on two sides serve as driven pieces to synchronously rotate, and then the supporting telescopic cylinder 1-3 lifts the supporting oil tank upwards; when the oil tank is unloaded, the positioning clamping jaws E stretch outwards, the left positioning clamp 1-1 and the right positioning clamp 1-2 move outwards to a specified distance along the first lead screw 1-1-3 and the second lead screw 1-2-3 simultaneously, and the oil tank grabbing and lifting mechanism on the conveying line moves to a detection station to grab and lift the oil tank to the next station;

the routine tightness checking mechanism 2 adopts a differential pressure detection method and comprises an inflating device 2-1, an oil supply port plug 2-2 and an inflating device slide way 2-3, wherein the inflating device 2-1 comprises: the device comprises an electromagnetic valve 2-1-1, an electromagnetic valve base 2-1-2, an air inlet pipeline 2-1-3, an air source connector 2-1-4, an oil tank air inlet connector 2-1-5, an electric push rod 2-1-6, a push rod motor 2-1-7 and a reversing box 2-1-8; the electromagnetic valve 2-1-1 is arranged on the electromagnetic valve base 2-1-2, the upper end of the electric push rod 2-1-6 is connected with the electromagnetic valve base 2-1-2 through a flange, the air source connector 2-1-4 and the oil tank air inlet connector 2-1-5 are connected with the electromagnetic valve 2-1-1 through an air inlet pipeline 2-1-3, and the electromagnetic valve 2-1-1 controls the on-off of the air inlet pipeline; a bevel gear-worm gear transmission pair is arranged in the reversing box 2-1-8, the output shaft of the push rod motor 2-1-7 rotates in the horizontal direction and is changed into a vertical direction through bevel gear meshing transmission, and then the worm gear at the other end of the driven bevel gear shaft is driven to rotate, so that the worm meshed with the bevel gear shaft is driven to do linear reciprocating motion in the vertical direction, the worm is connected with the electric push rod 2-1-6, and finally the telescopic motion of the electric push rod 2-1-6 is realized; in order to adapt to different oil tank sizes, the inflating device 2-1 is connected to a sliding block of the inflating device slideway 2-3 through a bolt, and the inflating device slideway 2-3 provides guiding, limiting and centering for longitudinal horizontal linear motion of the inflating device 2-1; the routine tightness checking mechanism 2 is connected to a detection table base 1-4 of the positioning support mechanism 1 through bolts; the sizes and angles of the oil tank air inlet connector 2-1-5 and the oil supply port plug 2-2 are respectively matched with an oil inlet and an oil supply port of the oil tank, the oil inlet is made of rubber materials, and the oil inlet extends out of a section of the oil tank body and is positioned on the edge of the oil tank and can be better connected with the oil tank air inlet connector 2-1-5, so that the oil inlet is used as a compressed air inlet and a detection port, the oil supply port plug 2-2 is used for sealing the oil supply port during detection, and the accuracy of a detection result is ensured;

the liquid ejecting and cleaning device 3 includes: a rotating mechanism 3-1, a moving component 3-2, a liquid spraying device 3-3, a brush cleaning device 3-4 and a cotton cloth wiping device 3-5; the rotating mechanism 3-1 comprises: a rotating motor 3-1-1, a rotating hanging block 3-1-2 and a rotating bracket 3-1-3; the moving assembly 3-2 comprises: 3-2-1 of a third motor, 3-2-2 of a third screw nut, 3-2-3 of a fourth motor, 3-2-4 of a fourth screw nut, 3-2-5 of a suspension arm and 3-2-6 of a suspension plate; the liquid ejecting apparatus 3-3 includes: 3-3-1 parts of a spray head rotating motor, 3-3-2 parts of an accessory box, 3-3-3 parts of a spray head base, 3-3-4 parts of a cleaning liquid spray head, 3-3-5 parts of a penetrating liquid spray head and 3-3-6 parts of a developing liquid spray head; the brush cleaning device 3-4 comprises: a brush motor 3-4-1 and a high-speed brush 3-4-2; the cotton cloth wiping device 3-5 comprises: 3-5-1 parts of a shell, 3-5-2 parts of a cloth winding cylinder, 3-5-3 parts of a waterproof seat, 3-5-4 parts of cotton cloth, 3-5-5 parts of a tension wheel and 3-5-6 parts of a wiping cloth roller; the liquid injection device 3-3 is connected with a third lead screw nut 3-2-2 of the moving assembly 3-2 through a hanging plate 3-2-6, the brush cleaning device 3-4 and the cotton cloth wiping device 3-5 are connected with a fourth lead screw nut 3-2-4 of the moving assembly 3-2 through two hanging plates 3-2-5, and the third motor 3-2-1 and the fourth motor 3-2-3 are respectively arranged at the upper ends of the third lead screw nut 3-2-2 and the fourth lead screw nut 3-2-4; the moving assembly 3-2 provides power and support guide for the vertical linear motion of the liquid injection device 3-3, the brush cleaning device 3-4 and the cotton cloth wiping device 3-5; the rotary motor 3-1-1 provides power for the rotation of the rotary hanging block 3-1-2, and the moving component 3-2 is arranged on the rotary hanging block 3-1-2 through a bolt, so that the moving component 3-2 and accessories arranged on the moving component are driven to rotate, and the real-time change of the path of the liquid spraying and cleaning device 3 when the shape of a welding line is irregular is realized; the liquid injection device 3-3 can spray three different detection liquids, the different spray heads are respectively connected with the detection liquid storage tanks corresponding to the spray heads, the power of the spray head rotating motor 3-3-1 drives the spray head base 3-3-3 to rotate through a device in the accessory box 3-3-2, the spray head base 3-3-3 is connected with a cleaning solution spray head 3-3-4, a penetrating fluid spray head 3-3-5 and a developing solution spray head 3-3-6, thereby driving the spray head to rotate, meeting the requirement of switching the positions of the corresponding spray heads in different leakage point detection steps, the detection result is most accurate when the spray heads and the detected surface keep included angles of 30-40 degrees, and the three spray heads of the liquid injection device 3-3 are designed into specific shapes; the brush motor 3-4-1 of the brush cleaning device 3-4 is connected with the high-speed brush 3-4-2 through a coupler to drive the brush to rotate at a high speed, so that most of residual liquid is brushed after the action time of the detection liquid is reached; the cotton cloth wiping device 3-5 wipes residual liquid in the previous step along with the movement track of the brush cleaning device 3-4, a large amount of cotton cloth is wound on the back surface of the cloth winding cylinder 3-5-2, the wetted cotton cloth is wound on the front surface of the cloth winding cylinder 3-5-2 through rolling of a cloth wiping roller 3-5-6 and a tensioning wheel 3-5-5 after a welding line is wiped, the wetted cotton cloth is replaced by dry cotton cloth, and a waterproof seat 3-5-3 is arranged below the cloth winding cylinder 3-5-2 close to one side of the wetted cotton cloth in order to prevent liquid from accumulating and dropping to pollute the dry cotton cloth when the wetted cotton cloth is stacked;

the missing point identification and marking device 4 comprises: the marking device comprises an image acquisition and recognition device 4-1, a marking device 4-2, a first hanging bracket 4-3, a second hanging bracket 4-4, a first nut 4-5 and a second nut 4-6; the image acquisition and recognition device 4-1 comprises: the CCD sensor 4-1-1 and the sensor support 4-1-2 are arranged, the bottom of the sensor support 4-1-2 is provided with a downward bulge, the contact surface of the first hanging bracket 4-3 and the sensor support 4-1-2 is provided with a specific groove, and the first hanging bracket 4-3 and the sensor support 4-1-2 are mutually nested to realize the positioning of the image acquisition and recognition device 4-1; the marking device 4-2 comprises: the marking liquid storage tank comprises a liquid pump 4-2-1, a marking nozzle 4-2-2 and a marking liquid storage tank 4-2-3, wherein a bulge is arranged at the bottom of the body 4-2-3 of the marking liquid storage tank downwards, a specific groove is arranged on the contact surface of the second hanger 4-4 and the body 4-2-3 of the marking liquid storage tank, the two hangers are mutually nested to realize the positioning of the body 4-2-3 of the marking liquid storage tank and the upper component thereof, and the liquid pump 4-2-1 and the marking nozzle 4-2-2 are arranged on a cover of the marking liquid storage tank 4-2; the image acquisition and recognition device 4-1 and the marking device 4-2 are respectively fixed on a first nut 4-5 and a second nut 4-6 through a first hanger 4-3 and a second hanger 4-4 by bolts, the first nut and the second nut are respectively matched with a fifth screw nut 5-3, and a proper distance is reserved between the first nut and the fifth screw nut; the CCD sensor 4-1-1 of the image acquisition and recognition device 4-1 can automatically recognize the defect position of the welding line, an alarm is given out when the color of the defect is abnormal, then the marking device 4-2 receives the alarm signal and moves to the corresponding position, the liquid pump 4-2-1 starts to work, the marking nozzle 4-2-2 is aligned to the defect position and is sprayed with pigment with a certain area, and the mark of the position of a missing point is realized;

the additional component 5 comprises: 5-1 of a portal frame, 5-2 of a fifth motor, 5-3 of a fifth screw nut, 5-4 of a sixth motor, 5-5 of a sixth screw nut, 5-6 of a seventh motor, 5-7 of a seventh screw nut and 5-8 of a liquid storage component; the portal frame 5-1, the seventh motor 5-6 and the seventh lead screw nut 5-7 are symmetrically arranged relative to the transverse central plane of the detection table base 1-4; the six motors 5-4 and the six lead screw nuts 5-5 are symmetrically arranged relative to the longitudinal central plane of the detection table base 1-4; the fifth motor 5-2 and the fifth lead screw nut 5-3 control the transverse linear motion of the missing point identification and marking device 4, the sixth motor 5-4 and the sixth lead screw nut 5-5 control the transverse linear motion of the liquid injection and cleaning device 3, and the seventh motor 5-6 and the seventh lead screw nut 5-7 control the longitudinal linear motion of the liquid injection and cleaning device 3 and the missing point identification and marking device 4; the portal frame 5-1 is mainly used for fixing and supporting a motor, a lead screw nut and the like and is formed by welding hollow square steel so as to realize light weight.

Compared with the prior art, the beneficial effects of the utility model are that:

a colored discernment of oil tank seepage and leak source automated inspection platform, adopt automatic oil tank supply line and automatic oil tank upper and lower piece of realizing of location supporting mechanism, utilize routine inspection mechanism of leakproofness to carry out preliminary seepage detection to the oil tank, judge whether there is the defect in oil tank welding seam, liquid jet and cleaning device and leak source discernment can the automatic defect location of discernment oil tank welding seam and mark it, the going on of the follow-up repair welding process of being convenient for, this automatic detection platform of colored discernment of oil tank seepage and leak source can realize the automatic detection of car oil tank welding seam defect location, discernment and mark, can effectively show oil tank welding seam surface defect, it is efficient to detect the precision, it is equally suitable for to have the oil tank of different structural style, provide basic equipment for the automatic detection of car oil tank seepage.

Drawings

Fig. 1 is an axonometric view of an automatic detection table for the oil tank leakage and leak spot coloration identification and of an oil tank transportation line according to the present invention;

FIG. 2 is an isometric view of an automatic detection table for oil tank leakage and leak site coloration identification according to the present invention;

FIG. 3 is a perspective view of the positioning and supporting mechanism of the present invention;

FIG. 4 is a schematic view of a power chuck according to the present invention;

FIG. 5 is a schematic structural view of the right horizontal positioning fixture of the present invention;

FIG. 6 is a schematic structural view of a routine leak testing mechanism according to the present invention;

FIG. 7 is a schematic view of a liquid ejecting and cleaning apparatus according to the present invention;

FIG. 8 is a schematic view showing a structure of a liquid ejecting apparatus according to the present invention and an enlarged view of a head;

FIG. 9 is a schematic view of the structure of the brush cleaning device and the cotton cloth drying device of the present invention;

FIG. 10 is a schematic view of the structure of the missing dot identification and marking apparatus of the present invention;

FIG. 11 is a schematic view of the assembly and installation of the additional components of the present invention;

Detailed Description

The invention will be described in further detail with reference to the accompanying drawings:

referring to fig. 1 and 2, the utility model relates to an automatic platform that detects of colored discernment of oil tank seepage and leak source mainly includes: the device comprises a positioning support mechanism 1, a routine tightness inspection mechanism 2, a liquid spraying and cleaning device 3, a missing point identification and marking device 4 and an additional component 5; the positioning and supporting mechanism 1 supports and positions the oil tank and adjusts the welding seam detection surface of the oil tank; the routine tightness checking mechanism 2 performs leakage detection on the oil tank by adopting a differential pressure method to judge whether the welding seam of the oil tank has defects; the liquid spraying and cleaning device 3 can be used for independently or simultaneously spraying, cleaning and wiping cleaning liquid, penetrating liquid and developing solution on the welding seam, and carrying out pretreatment for the leakage point identification work; the missing point identification and marking device 4 is used for carrying out image acquisition and missing point identification on the welding seam and automatically marking the position of the defect; the gantry of the additional component 5 mainly provides support and positioning for the installation of a motor, a screw nut and accessories connected with the screw nut, the motor and the screw nut provide guidance for the linear motion of the liquid ejecting and cleaning device 3 and the leak point identifying and marking device 4, and the liquid storage component 5-8 provides detection liquid such as required cleaning liquid, penetrating liquid, developing liquid and the like for the liquid ejecting and cleaning device 3;

referring to fig. 3 to 5, the positioning and supporting mechanism 1 includes: the device comprises a left side positioning clamp 1-1, a right side positioning clamp 1-2, a supporting telescopic cylinder 1-3 and a detection table base 1-4; the upper surfaces of the detection table bases 1-4 are provided with notches, so that the required space size is provided for later detection, and detection liquid is recovered; the left side positioning clamp 1-1 and the right side positioning clamp 1-2 are respectively connected with a detection table base 1-4 through a first bearing slide rail 1-1-4 and a second bearing slide rail 1-2-5 in a threaded connection mode, and a supporting telescopic cylinder 1-3 is connected in an open slot of the detection table base 1-4 through a bolt; the positioning support mechanism 1 and the longitudinal central plane of the oil tank to be detected are positioned on the same plane, and the two supporting telescopic cylinders 1-3 are symmetrically arranged relative to the transverse central plane of the detection platform base 1-4 to provide vertical support and displacement for the oil tank; the left side positioning jig 1-1 includes: the device comprises a first motor 1-1-1, a first supporting seat 1-1-2, a first lead screw 1-1-3, a first bearing slide rail 1-1-4, a chuck rotating motor 1-1-5, a chuck supporting seat 1-1-6, a power chuck 1-1-7 and a left oil tank stop block 1-1-8; the power chuck 1-1-7 comprises: the positioning claw type gear comprises a front end cover A, a positioning claw telescopic motor B, a driving bevel gear C, a driven gear D, a positioning claw E and a rear end cover F; the central lines of the front end cover A, the driven gear D and the rear end cover F are superposed and are connected through a friction sleeve; the positioning clamping jaw E is connected with the front end cover A in a nested mode through a surface slideway, and can only move in the radius direction; the chuck rotating motor 1-1-5, the power chuck 1-1-7 and the left oil tank stop dog 1-1-8 are supported on the upper part of the chuck support 1-1-6 through bearings, the first motor 1-1-1 provides power for the first lead screw 1-1-3, and the first lead screw 1-1-3 is connected with the chuck support 1-1-6 through threads, so that the chuck support 1-1-6 makes linear motion, and the power chuck 1-1-7 and the left oil tank stop dog 1-1-8 are driven to make transverse horizontal linear motion; the extending part of the output shaft of the chuck rotating motor 1-1-5 is supported by a chuck support 1-1-6 through a pair of bearings, one end of the output shaft is connected with a shell key of the power chuck 1-1-7, the other end of the output shaft is connected with a left oil tank stop block 1-1-8 through a coupler, and the chuck rotating motor 1-1-5 is started to enable the output shaft to rotate, so that the power chuck 1-1-7 and the left oil tank stop block 1-1-8 are driven to synchronously rotate, and the integral rotation of an oil tank is realized; the driving bevel gear C is meshed with one side bevel gear of the external driven gear D, the other side of the driving bevel gear C is provided with a spiral bulge which is meshed with a spiral groove at the back of the positioning claw E, and the power of the positioning claw telescopic motor B is transmitted to the positioning claw E through the two-stage transmission, so that the stretching or the contraction movement of the four positioning claws E is realized; the right positioning jig 1-2 includes: a second motor 1-2-1, a second motor support 1-2-2, a second lead screw 1-2-3, a second support seat 1-2-4, a second bearing slide rail 1-2-5, a right oil tank stop block 1-2-6, a stop block support 1-2-7 and a right clamp mounting seat 1-2-8; the second lead screw 1-2-3 is connected with the stop block support 1-2-7 through threads, and the second motor 1-2-1 provides power for the second lead screw 1-2-3, so that the oil tank stop block is driven to transversely and horizontally move linearly; the right oil tank stop block 1-2-6 is supported at the upper part of the stop block support 1-2-7 through a bearing, can freely rotate relative to the stop block support 1-2-7, and can move left and right through a second support seat 1-2-4 to clamp and release the oil tank left and right; the inner end surfaces of the left oil tank stop block 1-1-8 and the right oil tank stop block 1-2-6 are curved surfaces and are matched with the center of the end surface of the oil tank in shape; when an oil tank is loaded, the supporting telescopic cylinder 1-3 lifts the supporting oil tank upwards, the positioning clamping jaws E stretch outwards, the left positioning clamp 1-1 and the right positioning clamp 1-2 move inwards along the first lead screw 1-1-3 and the second lead screw 1-2-3 respectively in the transverse direction until the inner surface of the stop block is attached to the oil tank, the positioning clamping jaws E contract inwards to clamp the oil tank, and the position of the oil tank is fixed; when the oil tank needs to be rotated, the supporting telescopic cylinder 1-3 retracts downwards to prevent movement interference, the power chuck 1-1-7 integrally rotates for a certain angle under the driving of the motor, the oil tank stop blocks on two sides serve as driven pieces to synchronously rotate, and then the supporting telescopic cylinder 1-3 lifts the supporting oil tank upwards; when the oil tank is unloaded, the positioning clamping jaws E stretch outwards, the left positioning clamp 1-1 and the right positioning clamp 1-2 move outwards to a specified distance along the first lead screw 1-1-3 and the second lead screw 1-2-3 simultaneously, and the oil tank grabbing and lifting mechanism on the conveying line moves to a detection station to grab and lift the oil tank to the next station;

referring to fig. 6, the routine tightness checking mechanism 2 adopts a differential pressure detection method, and includes an inflator 2-1, an oil supply port plug 2-2, and an inflator slide 2-3, where the inflator 2-1 includes: the device comprises an electromagnetic valve 2-1-1, an electromagnetic valve base 2-1-2, an air inlet pipeline 2-1-3, an air source connector 2-1-4, an oil tank air inlet connector 2-1-5, an electric push rod 2-1-6, a push rod motor 2-1-7 and a reversing box 2-1-8; the electromagnetic valve 2-1-1 is arranged on the electromagnetic valve base 2-1-2, the upper end of the electric push rod 2-1-6 is connected with the electromagnetic valve base 2-1-2 through a flange, the air source connector 2-1-4 and the oil tank air inlet connector 2-1-5 are connected with the electromagnetic valve 2-1-1 through an air inlet pipeline 2-1-3, and the electromagnetic valve 2-1-1 controls the on-off of the air inlet pipeline; a bevel gear-worm gear transmission pair is arranged in the reversing box 2-1-8, the output shaft of the push rod motor 2-1-7 rotates in the horizontal direction and is changed into a vertical direction through bevel gear meshing transmission, and then the worm gear at the other end of the driven bevel gear shaft is driven to rotate, so that the worm meshed with the bevel gear shaft is driven to do linear reciprocating motion in the vertical direction, the worm is connected with the electric push rod 2-1-6, and finally the telescopic motion of the electric push rod 2-1-6 is realized; in order to adapt to different oil tank sizes, the inflating device 2-1 is connected to a sliding block of the inflating device slideway 2-3 through a bolt, and the inflating device slideway 2-3 provides guiding, limiting and centering for longitudinal horizontal linear motion of the inflating device 2-1; the routine tightness checking mechanism 2 is connected to a detection table base 1-4 of the positioning support mechanism 1 through bolts; the sizes and angles of the oil tank air inlet connector 2-1-5 and the oil supply port plug 2-2 are respectively matched with an oil inlet and an oil supply port of the oil tank, the oil inlet is made of rubber materials, and the oil inlet extends out of a section of the oil tank body and is positioned on the edge of the oil tank and can be better connected with the oil tank air inlet connector 2-1-5, so that the oil inlet is used as a compressed air inlet and a detection port, the oil supply port plug 2-2 is used for sealing the oil supply port during detection, and the accuracy of a detection result is ensured;

referring to fig. 7 to 9, the liquid ejecting and cleaning apparatus 3 includes: a rotating mechanism 3-1, a moving component 3-2, a liquid spraying device 3-3, a brush cleaning device 3-4 and a cotton cloth wiping device 3-5; the rotating mechanism 3-1 comprises: a rotating motor 3-1-1, a rotating hanging block 3-1-2 and a rotating bracket 3-1-3; the moving assembly 3-2 comprises: 3-2-1 of a third motor, 3-2-2 of a third screw nut, 3-2-3 of a fourth motor, 3-2-4 of a fourth screw nut, 3-2-5 of a suspension arm and 3-2-6 of a suspension plate; the liquid ejecting apparatus 3-3 includes: 3-3-1 parts of a spray head rotating motor, 3-3-2 parts of an accessory box, 3-3-3 parts of a spray head base, 3-3-4 parts of a cleaning liquid spray head, 3-3-5 parts of a penetrating liquid spray head and 3-3-6 parts of a developing liquid spray head; the brush cleaning device 3-4 comprises: a brush motor 3-4-1 and a high-speed brush 3-4-2; the cotton cloth wiping device 3-5 comprises: 3-5-1 parts of a shell, 3-5-2 parts of a cloth winding cylinder, 3-5-3 parts of a waterproof seat, 3-5-4 parts of cotton cloth, 3-5-5 parts of a tension wheel and 3-5-6 parts of a wiping cloth roller; the liquid injection device 3-3 is connected with a third lead screw nut 3-2-2 of the moving assembly 3-2 through a hanging plate 3-2-6, the brush cleaning device 3-4 and the cotton cloth wiping device 3-5 are connected with a fourth lead screw nut 3-2-4 of the moving assembly 3-2 through two hanging plates 3-2-5, and the third motor 3-2-1 and the fourth motor 3-2-3 are respectively arranged at the upper ends of the third lead screw nut 3-2-2 and the fourth lead screw nut 3-2-4; the moving assembly 3-2 provides power and support guide for the vertical linear motion of the liquid injection device 3-3, the brush cleaning device 3-4 and the cotton cloth wiping device 3-5; the rotary motor 3-1-1 provides power for the rotation of the rotary hanging block 3-1-2, and the moving component 3-2 is arranged on the rotary hanging block 3-1-2 through a bolt, so that the moving component 3-2 and accessories arranged on the moving component are driven to rotate, and the real-time change of the path of the liquid spraying and cleaning device 3 when the shape of a welding line is irregular is realized; the liquid injection device 3-3 can spray three different detection liquids, the different spray heads are respectively connected with the detection liquid storage tanks corresponding to the spray heads, the power of the spray head rotating motor 3-3-1 drives the spray head base 3-3-3 to rotate through a device in the accessory box 3-3-2, the spray head base 3-3-3 is connected with a cleaning solution spray head 3-3-4, a penetrating fluid spray head 3-3-5 and a developing solution spray head 3-3-6, thereby driving the spray head to rotate, meeting the requirement of switching the positions of the corresponding spray heads in different leakage point detection steps, the detection result is most accurate when the spray heads and the detected surface keep included angles of 30-40 degrees, and the three spray heads of the liquid injection device 3-3 are designed into specific shapes; the brush motor 3-4-1 of the brush cleaning device 3-4 is connected with the high-speed brush 3-4-2 through a coupler to drive the brush to rotate at a high speed, so that most of residual liquid is brushed after the action time of the detection liquid is reached; the cotton cloth wiping device 3-5 wipes residual liquid in the previous step along with the movement track of the brush cleaning device 3-4, a large amount of cotton cloth is wound on the back surface of the cloth winding cylinder 3-5-2, the wetted cotton cloth is wound on the front surface of the cloth winding cylinder 3-5-2 through rolling of a cloth wiping roller 3-5-6 and a tensioning wheel 3-5-5 after a welding line is wiped, the wetted cotton cloth is replaced by dry cotton cloth, and a waterproof seat 3-5-3 is arranged below the cloth winding cylinder 3-5-2 close to one side of the wetted cotton cloth in order to prevent liquid from accumulating and dropping to pollute the dry cotton cloth when the wetted cotton cloth is stacked;

referring to fig. 10, the missing point identification and marking device 4 includes: the marking device comprises an image acquisition and recognition device 4-1, a marking device 4-2, a first hanging bracket 4-3, a second hanging bracket 4-4, a first nut 4-5 and a second nut 4-6; the image acquisition and recognition device 4-1 comprises: the CCD sensor 4-1-1 and the sensor support 4-1-2 are arranged, the bottom of the sensor support 4-1-2 is provided with a downward bulge, the contact surface of the first hanging bracket 4-3 and the sensor support 4-1-2 is provided with a specific groove, and the first hanging bracket 4-3 and the sensor support 4-1-2 are mutually nested to realize the positioning of the image acquisition and recognition device 4-1; the marking device 4-2 comprises: the marking liquid storage tank comprises a liquid pump 4-2-1, a marking nozzle 4-2-2 and a marking liquid storage tank 4-2-3, wherein a bulge is arranged at the bottom of the body 4-2-3 of the marking liquid storage tank downwards, a specific groove is arranged on the contact surface of the second hanger 4-4 and the body 4-2-3 of the marking liquid storage tank, the two hangers are mutually nested to realize the positioning of the body 4-2-3 of the marking liquid storage tank and the upper component thereof, and the liquid pump 4-2-1 and the marking nozzle 4-2-2 are arranged on a cover of the marking liquid storage tank 4-2; the image acquisition and recognition device 4-1 and the marking device 4-2 are respectively fixed on a first nut 4-5 and a second nut 4-6 through a first hanger 4-3 and a second hanger 4-4 by bolts, the first nut and the second nut are respectively matched with a fifth screw nut 5-3, and a proper distance is reserved between the first nut and the fifth screw nut; the CCD sensor 4-1-1 of the image acquisition and recognition device 4-1 can automatically recognize the defect position of the welding line, an alarm is given out when the color of the defect is abnormal, then the marking device 4-2 receives the alarm signal and moves to the corresponding position, the liquid pump 4-2-1 starts to work, the marking nozzle 4-2-2 is aligned to the defect position and is sprayed with pigment with a certain area, and the mark of the position of a missing point is realized;

referring to fig. 11, the additional assembly 5 includes: 5-1 of a portal frame, 5-2 of a fifth motor, 5-3 of a fifth screw nut, 5-4 of a sixth motor, 5-5 of a sixth screw nut, 5-6 of a seventh motor, 5-7 of a seventh screw nut and 5-8 of a liquid storage component; the portal frame 5-1, the seventh motor 5-6 and the seventh lead screw nut 5-7 are symmetrically arranged relative to the transverse central plane of the detection table base 1-4; the six motors 5-4 and the six lead screw nuts 5-5 are symmetrically arranged relative to the longitudinal central plane of the detection table base 1-4; the fifth motor 5-2 and the fifth lead screw nut 5-3 control the transverse linear motion of the missing point identification and marking device 4, the sixth motor 5-4 and the sixth lead screw nut 5-5 control the transverse linear motion of the liquid injection and cleaning device 3, and the seventh motor 5-6 and the seventh lead screw nut 5-7 control the longitudinal linear motion of the liquid injection and cleaning device 3 and the missing point identification and marking device 4; the portal frame 5-1 is mainly used for fixing and supporting a motor, a lead screw nut and the like and is formed by welding hollow square steel so as to realize light weight.

Now take the process of detecting two kinds of girth welds as an example, describe in detail the utility model discloses a concrete implementation mode:

the method comprises the following steps: the oil tank is transported to a designated position by an oil tank transport line, the oil tank is supported by a supporting telescopic cylinder, a positioning clamping jaw extends outwards, a left oil tank positioning clamp and a right oil tank positioning clamp respectively move oppositely along corresponding lead screw nuts until the inner surface of a stop block is attached to the oil tank, the positioning clamping jaw retracts inwards to clamp the oil tank, and the position of the oil tank is fixed;

step two: the routine tightness inspection mechanism is started, an oil supply port is sealed, an oil inlet is connected with an air source, gas with specified pressure is filled into the routine tightness inspection mechanism, the routine tightness inspection mechanism is placed for 30s to enable the internal air pressure to be stable, a detection valve is opened to carry out differential pressure detection, qualified products are conveyed out of the detection table by an oil tank conveying line according to detection results, defective products are subjected to the next detection procedure, the routine tightness inspection mechanism is disconnected from the detected oil tank and retreats to the side edge of the detection table along a sliding rail, and other device movement parts are not interfered;

step three: the two sets of liquid injection and cleaning devices are longitudinally conveyed to the welding line of the oil tank on the same side through a seventh lead screw nut, are transversely conveyed to the welding line of the end face on the two sides of the oil tank through a sixth lead screw nut, and are started to perform the following substeps:

firstly, spraying cleaning liquid, wherein the distance between a cleaning liquid spray head and the surface of a welding seam is 15-20 cm, spraying the cleaning liquid to pre-clean the welding seam, and then wiping dirt on the surface;

secondly, penetrating fluid is sprayed, a spray head of the penetrating fluid keeps a distance of 30-40 cm from the surface of a welding seam, a spraying angle forms an included angle of 30-40 degrees with the welding seam, a certain amount of penetrating agent is continuously sprayed to the position of the welding seam, and the penetrating agent is fully penetrated into the defect position of the welding seam of the oil tank after standing for about 15 minutes;

thirdly, spraying cleaning fluid to clean penetrating fluid on the complete surface of the welding seam, preventing the penetrating fluid on the complete surface of the welding seam from acting with the next developing solution to influence the detection accuracy, and then wiping the welding seam clean;

fourthly, the developing solution is sprayed, a spray head of the developing solution keeps a distance of 30 to 40 centimeters from the surface of the welding seam, the spraying angle and the welding seam form an included angle of 30 to 40 degrees, a certain amount of developing solution is continuously sprayed to the position of the welding seam, the standing time is more than 10 minutes but not too long, and the developing solution and the penetrating fluid fully act and develop images;

simultaneously, the two sets of liquid injection and cleaning devices move at a constant speed along a welding line path under the driving of the screw nut, and after the welding lines at two ends of the same surface of the oil tank are detected, the motor rotates reversely and moves back to the side edge of the detection platform along the slide rail without interfering with the movement of other devices;

step four: the missing point identification and marking device controls transverse and longitudinal movement through a fifth screw nut and a seventh screw nut, the device moves at a constant speed along a welding seam track detected by the liquid injection and cleaning device in the third step, the image acquisition and identification device automatically identifies the color abnormality of the defect position of the welding seam and gives an alarm in the process, the marking device receives an alarm signal and moves to a corresponding position to spray paint, the marking of the missing point position is realized, then the missing point identification and marking device moves back to the side edge of the detection table along a sliding rail without interfering with other devices, and the 1/4 girth welding seam detection process is completed at the moment;

step five: the supporting telescopic cylinder retracts downwards, the power chuck rotates by 90 degrees to drive the oil tank and the oil tank stop blocks on the two sides to synchronously rotate by 90 degrees, then the supporting telescopic cylinder lifts the supporting oil tank upwards, and the position of the oil tank is fixed again;

and repeating the third step to the fifth step for three times, and finishing the automatic detection test of the circular welding lines on the two sides of the oil tank.

The above description is the preferred embodiment of the present invention, and the present invention is not limited thereto.

Claims (1)

1. The utility model provides an automatic platform that detects of colored discernment of oil tank seepage and leak source which characterized in that an automatic platform that detects of colored discernment of oil tank seepage and leak source mainly include: the device comprises a positioning support mechanism (1), a routine tightness checking mechanism (2), a liquid spraying and cleaning device (3), a leak point identification and marking device (4) and an additional component (5); the positioning and supporting mechanism (1) supports and positions the oil tank and adjusts the welding seam detection surface of the oil tank; the routine tightness checking mechanism (2) performs leakage detection on the oil tank by adopting a differential pressure method, and judges whether a welding line of the oil tank has defects; the liquid spraying and cleaning device (3) can be used for spraying cleaning liquid, penetrating liquid and developing solution and cleaning and wiping the weld joint independently or simultaneously, and preprocessing the leakage point identification work; the missing point identification and marking device (4) is used for carrying out image acquisition and missing point identification on the welding seam and automatically marking the position of the defect; the gantry of the additional component (5) mainly provides support and positioning for the installation of a motor, a screw nut and accessories connected with the screw nut, the motor and the screw nut provide guidance for the linear motion of the liquid ejecting and cleaning device (3) and the leak point identifying and marking device (4), and the liquid storage component (5-8) supplies detection liquids such as required cleaning liquid, penetrating liquid, developing liquid and the like for the liquid ejecting and cleaning device (3);

the positioning and supporting mechanism (1) comprises: the device comprises a left side positioning clamp (1-1), a right side positioning clamp (1-2), a supporting telescopic cylinder (1-3) and a detection table base (1-4); the upper surface of the detection table base (1-4) is provided with a notch, so that the required space size is provided for later detection, and detection liquid is recovered; the left side positioning clamp (1-1) and the right side positioning clamp (1-2) are respectively connected with the detection table base (1-4) through a first bearing slide rail (1-1-4) and a second bearing slide rail (1-2-5) in a threaded connection mode, and the supporting telescopic cylinder (1-3) is connected in an open slot of the detection table base (1-4) through a bolt; the positioning and supporting mechanism (1) and the longitudinal central plane of the oil tank to be detected are positioned on the same plane, and the two supporting telescopic cylinders (1-3) are symmetrically arranged relative to the transverse central plane of the detection platform base (1-4) to provide vertical supporting and displacement for the oil tank; the left side positioning jig (1-1) comprises: the device comprises a first motor (1-1-1), a first supporting seat (1-1-2), a first lead screw (1-1-3), a first bearing slide rail (1-1-4), a chuck rotating motor (1-1-5), a chuck supporting seat (1-1-6), a power chuck (1-1-7) and a left oil tank stop block (1-1-8); the power chuck (1-1-7) comprises: the device comprises a front end cover (A), a positioning jaw telescopic motor (B), a driving bevel gear (C), a driven gear (D), a positioning jaw (E) and a rear end cover (F); the central lines of the front end cover (A), the driven gear (D) and the rear end cover (F) are superposed and are connected through a friction sleeve; the positioning clamping jaw (E) is connected with the front end cover (A) in a nested manner through a surface slideway, and can only move along the radius direction; the chuck rotating motor (1-1-5), the power chuck (1-1-7) and the left oil tank stop block (1-1-8) are supported on the upper part of the chuck support (1-1-6) through bearings, the first motor (1-1-1) provides power for the first lead screw (1-1-3), and the first lead screw (1-1-3) is connected with the chuck support (1-1-6) through threads, so that the chuck support (1-1-6) makes linear motion, and the power chuck (1-1-7) and the left oil tank stop block (1-1-8) are driven to make transverse horizontal linear motion; the extending part of an output shaft of the chuck rotating motor (1-1-5) is supported by a chuck support (1-1-6) through a pair of bearings, one end of the output shaft is connected with a shell key of the power chuck (1-1-7), the other end of the output shaft is connected with a left oil tank stop block (1-1-8) through a coupler, and the chuck rotating motor (1-1-5) is started to enable the output shaft to rotate, so that the power chuck (1-1-7) and the left oil tank stop block (1-1-8) are driven to synchronously rotate, and the integral rotation of an oil tank is realized; the driving bevel gear (C) is meshed with one side face bevel gear of the outer driven gear (D), the other side face of the driving bevel gear is provided with a spiral bulge which is meshed with a spiral groove at the back of the positioning clamping jaw (E), and the power of the positioning clamping jaw telescopic motor (B) is transmitted to the positioning clamping jaw (E) through the two-stage transmission, so that the stretching or the contraction movement of the four positioning clamping jaws (E) is realized; the right positioning clamp (1-2) comprises: a second motor (1-2-1), a second motor support (1-2-2), a second lead screw (1-2-3), a second support seat (1-2-4), a second bearing slide rail (1-2-5), a right oil tank stop block (1-2-6), a stop block support (1-2-7) and a right clamp mounting seat (1-2-8); the second lead screw (1-2-3) is connected with the stop block support (1-2-7) through threads, and the second motor (1-2-1) provides power for the second lead screw (1-2-3) so as to drive the oil tank stop block to do horizontal linear motion; the right oil tank stop block (1-2-6) is supported at the upper part of the stop block support (1-2-7) through a bearing, can freely rotate relative to the stop block support (1-2-7), and can move left and right through a second support seat (1-2-4) to clamp and release the oil tank left and right; the inner end surfaces of the left oil tank stop block (1-1-8) and the right oil tank stop block (1-2-6) are curved surfaces and are matched with the center of the end surface of the oil tank in shape; when an oil tank is loaded, the supporting telescopic cylinder (1-3) lifts the supporting oil tank upwards, the positioning clamping jaws (E) stretch outwards, the left positioning clamp (1-1) and the right positioning clamp (1-2) move inwards simultaneously along the first lead screw (1-1-3) and the second lead screw (1-2-3) until the inner surface of the stop block is tightly attached to the oil tank, the positioning clamping jaws (E) contract inwards to clamp the oil tank, and the position of the oil tank is fixed; when the oil tank needs to be rotated, the supporting telescopic cylinder (1-3) retracts downwards to prevent movement interference, the power chuck (1-1-7) integrally rotates for a certain angle under the driving of the motor, the oil tank stop blocks on two sides serve as driven pieces to synchronously rotate, and then the supporting telescopic cylinder (1-3) lifts the supporting oil tank upwards; when an oil tank is placed, the positioning clamping jaws (E) stretch outwards, the left positioning clamp (1-1) and the right positioning clamp (1-2) move outwards to a specified distance along the first lead screw (1-1-3) and the second lead screw (1-2-3) respectively, and the oil tank grabbing and lifting mechanism on the conveying line moves to a detection station to grab and lift the oil tank to the next station;

the routine tightness checking mechanism (2) adopts a differential pressure detection method and comprises an inflating device (2-1), an oil supply port plug (2-2) and an inflating device slide way (2-3), wherein the inflating device (2-1) comprises: the device comprises an electromagnetic valve (2-1-1), an electromagnetic valve base (2-1-2), an air inlet pipeline (2-1-3), an air source connector (2-1-4), an oil tank air inlet connector (2-1-5), an electric push rod (2-1-6), a push rod motor (2-1-7) and a reversing box (2-1-8); the electromagnetic valve (2-1-1) is installed on the electromagnetic valve base (2-1-2), the upper end of the electric push rod (2-1-6) is connected with the electromagnetic valve base (2-1-2) through a flange, the air source connector (2-1-4) and the oil tank air inlet connector (2-1-5) are connected with the electromagnetic valve (2-1-1) through an air inlet pipeline (2-1-3), and the electromagnetic valve (2-1-1) controls the on-off of the air inlet pipeline; a bevel gear-worm gear transmission pair is arranged in the reversing box (2-1-8), an output shaft of the push rod motor (2-1-7) rotates in the horizontal direction and is changed into a vertical direction through bevel gear meshing transmission, and then a worm gear at the other end of the driven bevel gear shaft is driven to rotate, so that a worm meshed with the bevel gear is driven to do linear reciprocating motion in the vertical direction, the worm is connected with the electric push rod (2-1-6), and finally the electric push rod (2-1-6) stretches out and draws back; in order to adapt to different oil tank sizes, the inflating device (2-1) is connected to a sliding block of the inflating device slide way (2-3) through a bolt, and the inflating device slide way (2-3) provides guiding, limiting and centering for longitudinal horizontal linear motion of the inflating device (2-1); the routine tightness checking mechanism (2) is connected to a detection table base (1-4) of the positioning support mechanism (1) through bolts; the sizes and angles of the oil tank air inlet connector (2-1-5) and the oil supply port sealing plug (2-2) are respectively matched with an oil inlet and an oil supply port of an oil tank, the oil inlet is made of rubber materials, and the oil inlet extends out of a section of the oil tank body and is positioned on the edge of the oil tank and can be better connected with the oil tank air inlet connector (2-1-5), so that the oil inlet is used as a compressed air inlet and a detection port, the oil supply port is sealed by the oil supply port sealing plug (2-2) during detection, and the accuracy of a detection result is ensured;

the liquid ejecting and cleaning device (3) comprises: a rotating mechanism (3-1), a moving component (3-2), a liquid injection device (3-3), a brush cleaning device (3-4) and a cotton cloth wiping device (3-5); the rotating mechanism (3-1) comprises: a rotating motor (3-1-1), a rotating hanging block (3-1-2) and a rotating bracket (3-1-3); the moving assembly (3-2) comprises: a third motor (3-2-1), a third lead screw nut (3-2-2), a fourth motor (3-2-3), a fourth lead screw nut (3-2-4), a suspension arm (3-2-5) and a suspension plate (3-2-6); the liquid ejecting apparatus (3-3) includes: a nozzle rotating motor (3-3-1), an accessory box (3-3-2), a nozzle base (3-3-3), a cleaning liquid nozzle (3-3-4), a penetrating liquid nozzle (3-3-5) and a developing liquid nozzle (3-3-6); the brush cleaning device (3-4) comprises: a brush motor (3-4-1) and a high-speed brush (3-4-2); the cotton cloth wiping device (3-5) comprises: a shell (3-5-1), a cloth winding cylinder (3-5-2), a waterproof seat (3-5-3), cotton cloth (3-5-4), a tension wheel (3-5-5) and a wiping cloth roller (3-5-6); the liquid injection device (3-3) is connected with a third lead screw nut (3-2-2) of the moving assembly (3-2) through a hanging plate (3-2-6), the brush cleaning device (3-4) and the cotton cloth wiping device (3-5) are connected with a fourth lead screw nut (3-2-4) of the moving assembly (3-2) through two hanging plates (3-2-5), and the third motor (3-2-1) and the fourth motor (3-2-3) are respectively installed at the upper ends of the third lead screw nut (3-2-2) and the fourth lead screw nut (3-2-4); the moving assembly (3-2) provides power and support guide for the vertical linear motion of the liquid injection device (3-3), the brush cleaning device (3-4) and the cotton cloth wiping device (3-5); the rotary motor (3-1-1) provides power for the rotation of the rotary lifting block (3-1-2), and the moving component (3-2) is installed on the rotary lifting block (3-1-2) through a bolt, so that the moving component (3-2) and accessories installed on the moving component are driven to rotate, and the real-time change of the path of the liquid spraying and cleaning device (3) when the shape of a welding seam is irregular is realized; the liquid injection device (3-3) can spray three different detection liquids, the different nozzles are respectively connected with the detection liquid storage tanks corresponding to the different nozzles, the power of the spray head rotating motor (3-3-1) drives the spray head base (3-3-3) to rotate through a device in the accessory box (3-3-2), the spray head base (3-3-3) is connected with a cleaning solution spray head (3-3-4), a penetrating fluid spray head (3-3-5) and a developing solution spray head (3-3-6), thereby driving the spray head to rotate, meeting the requirement of switching the positions of the corresponding spray heads in different leakage point detection steps, the detection result is most accurate when the spray head and the detected surface keep an included angle of 30-40 degrees, and the three spray heads of the liquid injection device (3-3) are designed into specific shapes; a brush motor (3-4-1) of the brush cleaning device (3-4) is connected with the high-speed brush (3-4-2) through a coupler to drive the brush to rotate at a high speed, so that most of residual liquid is brushed after the action time of the detection liquid is reached; the cotton cloth wiping device (3-5) wipes residual liquid in the previous step along with the movement track of the brush cleaning device (3-4), the back of the cloth winding cylinder (3-5-2) is wound with a large amount of cotton cloth, after a welding line is wiped, the wetted cotton cloth is wound on the front of the cloth winding cylinder (3-5-2) through the rolling of a wiping roller (3-5-6) and a tension wheel (3-5-5), the wetted cotton cloth is replaced by dry cotton cloth, in order to prevent liquid from accumulating and dropping to pollute the dry cotton cloth when the wetted cotton cloth is stacked, a waterproof seat (3-5-3) is arranged below the cloth winding cylinder (3-5-2) close to one side of the wetted cotton cloth;

the missing point identification and marking device (4) comprises: the marking device comprises an image acquisition and recognition device (4-1), a marking device (4-2), a first hanging bracket (4-3), a second hanging bracket (4-4), a first nut (4-5) and a second nut (4-6); the image acquisition and recognition device (4-1) comprises: the CCD sensor (4-1-1) and the sensor support (4-1-2), the bottom of the sensor support (4-1-2) is provided with a bulge downwards, the contact surface of the first hanging bracket (4-3) and the sensor support (4-1-2) is provided with a specific groove, and the first hanging bracket and the specific groove are mutually nested to realize the positioning of the image acquisition and recognition device (4-1); the marking device (4-2) comprises: the liquid pump (4-2-1), the marking nozzle (4-2-2) and the marking liquid storage tank (4-2-3), a projection is arranged at the bottom of the marking liquid storage tank (4-2-3) downwards, a specific groove is arranged on the contact surface of the second hanger (4-4) and the marking liquid storage tank (4-2-3), the second hanger and the specific groove are mutually nested to realize the positioning of the marking liquid storage tank (4-2-3) and an upper component thereof, and the liquid pump (4-2-1) and the marking nozzle (4-2-2) are arranged on the marking liquid storage tank (4-2-3) cover; the image acquisition and recognition device (4-1) and the marking device (4-2) are respectively fixed on a first nut (4-5) and a second nut (4-6) through a first hanger (4-3) and a second hanger (4-4) by bolts, the first nut and the second nut are respectively matched with a fifth screw nut (5-3), and a proper distance is reserved between the first nut and the second nut; the CCD sensor (4-1-1) of the image acquisition and recognition device (4-1) can automatically recognize the defect position of a welding line, an alarm is given out when the color of the defect is abnormal, then the marking device (4-2) receives the alarm signal and moves to the corresponding position, the liquid pump (4-2-1) starts to work, and the marking nozzle (4-2-2) is aligned to the defect position and is sprayed with pigment with a certain area, so that the position of a leakage point is marked;

the additional assembly (5) comprises: the device comprises a portal frame (5-1), a fifth motor (5-2), a fifth screw nut (5-3), a sixth motor (5-4), a sixth screw nut (5-5), a seventh motor (5-6), a seventh screw nut (5-7) and a liquid storage component (5-8); the portal frame (5-1), the seventh motor (5-6) and the seventh lead screw nut (5-7) are symmetrically arranged relative to the transverse central plane of the detection table base (1-4); the six motors (5-4) and the six lead screw nuts (5-5) are symmetrically arranged relative to the longitudinal central plane of the detection table base (1-4); the fifth motor (5-2) and the fifth lead screw nut (5-3) control the transverse linear motion of the missing point identification and marking device (4), the sixth motor (5-4) and the sixth lead screw nut (5-5) control the transverse linear motion of the liquid injection and cleaning device (3), and the seventh motor (5-6) and the seventh lead screw nut (5-7) control the longitudinal linear motion of the liquid injection and cleaning device (3) and the missing point identification and marking device (4); the portal frame (5-1) is mainly used for fixing and supporting a motor, a lead screw nut and the like and is formed by welding hollow square steel so as to realize light weight.

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