CN117571229A - Welding seam detection device for electrode frame-polar plate or mastoid plate of alkaline water hydrogen production electrolytic tank - Google Patents

Welding seam detection device for electrode frame-polar plate or mastoid plate of alkaline water hydrogen production electrolytic tank Download PDF

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Publication number
CN117571229A
CN117571229A CN202311313539.8A CN202311313539A CN117571229A CN 117571229 A CN117571229 A CN 117571229A CN 202311313539 A CN202311313539 A CN 202311313539A CN 117571229 A CN117571229 A CN 117571229A
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China
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frame
plate
pressing
spraying
welding seam
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CN202311313539.8A
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Chinese (zh)
Inventor
周铁梁
田登福
李忠明
耿佳彬
贾晓英
刘倩
刘红磊
吴新朋
张韩
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Huadian Caofeidian Heavy Industry Co ltd
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Huadian Caofeidian Heavy Industry Co ltd
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Priority to CN202311313539.8A priority Critical patent/CN117571229A/en
Publication of CN117571229A publication Critical patent/CN117571229A/en
Pending legal-status Critical Current

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M3/00—Investigating fluid-tightness of structures
    • G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
    • G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
    • G01M3/28—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds
    • G01M3/2884—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds for welds
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M3/00—Investigating fluid-tightness of structures
    • G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
    • G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
    • G01M3/20—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M3/00—Investigating fluid-tightness of structures
    • G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
    • G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
    • G01M3/20—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material
    • G01M3/22—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material for pipes, cables or tubes; for pipe joints or seals; for valves; for welds; for containers, e.g. radiators
    • G01M3/225—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material for pipes, cables or tubes; for pipe joints or seals; for valves; for welds; for containers, e.g. radiators for welds
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M3/00—Investigating fluid-tightness of structures
    • G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
    • G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/01—Arrangements or apparatus for facilitating the optical investigation
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/84—Systems specially adapted for particular applications
    • G01N21/88—Investigating the presence of flaws or contamination
    • G01N21/95—Investigating the presence of flaws or contamination characterised by the material or shape of the object to be examined
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/30—Hydrogen technology
    • Y02E60/36—Hydrogen production from non-carbon containing sources, e.g. by water electrolysis

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Arc Welding In General (AREA)

Abstract

The invention relates to a welding seam detection device of a polar frame-polar plate or a mastoid plate of an alkaline water hydrogen production electrolytic tank, which comprises an airtight detection device, a developer spraying device and a visual imaging device; the airtight detection device comprises an airtight detection mechanism and a pressing mechanism, wherein the airtight detection mechanism comprises a vacuum operation table and a rotary platform, a plurality of air connecting holes are formed in the rotary platform, two sealing rings are detachably arranged on the rotary platform, and any air connecting hole is arranged between the two sealing rings; the pressing mechanism comprises a pressing frame, a pressing assembly and a height sensor, the pressing assembly comprises a connecting arm and a pressing disc, and the pressing disc is coaxially arranged above the rotary platform; the developer spraying device comprises a spraying frame, a rotary rocker arm and a spraying mechanism; the visual imaging device comprises a visual detection frame, a fluorescent lamp and an identification camera. The invention is applicable to the air tightness detection of workpieces with different diameters, has high efficiency and accuracy in detection, greatly shortens the detection time, and is applicable to the large-scale and batch production of alkaline hydrogen production electrolytic tanks.

Description

Welding seam detection device for electrode frame-polar plate or mastoid plate of alkaline water hydrogen production electrolytic tank
Technical Field
The invention relates to the technical field of weld joint detection, in particular to a weld joint detection device for a polar frame-polar plate or a mastoid plate of an alkaline water hydrogen production electrolytic tank.
Background
The alkaline hydrogen production electrolytic tank is generally divided into a plate net structure and a mastoid structure, and the welding tightness is a key ring for ensuring no liquid leakage and liquid flowing in the hydrogen production process. The electrode plate is a supporting component of the electrolytic tank and is used for supporting the electrode, the diaphragm and the electric conduction, the electrode plate is processed in a way of being processed and punched to be in a mastoid structure by a machine, and is formed by integrally plating nickel after being welded with the electrode frame, and in order to ensure the sealing performance of the welding of the electrode plate and the electrode frame, the welding seam is inspected.
The conventional inspection mode is to manually perform inspection, namely, manually smearing lime solution on one surface of a welding seam, smearing kerosene on the other surface of the welding seam at intervals after the lime solution is dried, and checking whether the kerosene oozes out from one surface of the lime after waiting for a certain time, wherein the oozes out are qualified products. The method needs to turn over the workpiece for multiple times, has long time consumption for coating and waiting, has the risk of misjudgment and omission of judgment due to uneven manual coating, and has the problems of inflammability and volatilization of kerosene, safety and environmental protection.
Some detection modes adopt air tightness detection, such as an electrolytic tank polar plate welding seam air tightness detection device disclosed in patent publication No. CN218973762U, and the air tightness of the welding seam can be detected only by vacuumizing one side without smearing a detection object. In addition, as disclosed in patent publication No. CN218628822U, the airtight detection equipment for the welding seam of the electrode frame assembled by the alkaline water hydrogen-producing electrolytic cell can detect the airtight of the detected object through the airtight detection rotating platform.
The above air tightness detection device has the following problems: 1. whether the whole weld joint is airtight or not can only be detected, and the specific ventilation position of the weld joint with poor tightness cannot be determined; 2. the applicable workpieces are single in size, and workpieces with different diameters are difficult to detect; 3. it is difficult to realize a large-scale and large-scale detection flow.
Disclosure of Invention
The invention provides a welding seam detection device for a polar frame-polar plate or a mastoid plate of an alkaline water hydrogen production electrolytic tank, which aims to solve the problems that the conventional airtight detection device is small in application range and the ventilation position of a welding seam cannot be determined specifically.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
the welding seam detection device for the electrode frame-polar plate or mastoid plate of the alkaline water hydrogen production electrolytic tank comprises an airtight detection device, a developer spraying device and a visual imaging device;
the airtight detection device comprises an airtight detection mechanism and a pressing mechanism which are arranged in parallel, wherein the airtight detection mechanism comprises a vacuum operation platform and a circular rotary platform which is rotatably arranged above the vacuum operation platform, a plurality of air receiving holes which are arranged along the radial direction of the rotary platform at intervals are formed in the rotary platform, two sealing rings which are concentrically arranged are detachably arranged on the rotary platform, and any air receiving hole is arranged between the two sealing rings, so that workpieces with different specifications and sizes can be conveniently used;
the pressing mechanism comprises a vertical pressing frame, a pressing assembly sliding up and down along the pressing frame and a height sensor for detecting the lifting of the pressing assembly, wherein the pressing assembly comprises a connecting arm and a pressing disc which is rotatably arranged below the connecting arm and has an adjustable diameter, and the pressing disc is coaxially arranged above the rotary platform so as to be convenient for being matched with the rotary platform to clamp a workpiece;
the developer spraying device comprises a vertical spraying frame, a rotary rocker arm rotatably arranged above the spraying frame and a spraying mechanism arranged at the end part of the rotary rocker arm, wherein a plurality of airtight detection devices are circumferentially arranged on the peripheral side of the developer spraying device, so that batch workpiece detection is facilitated; the visual imaging device comprises a visual detection frame, a fluorescent lamp arranged in the middle of the visual detection frame and a plurality of identification cameras which are all arranged on the periphery of the visual detection frame in the circumferential direction.
Further, be provided with slewing bearing between vacuum operation panel and the rotary platform, be convenient for realize rotary platform's rotation, be provided with gear motor in the vacuum operation panel, the last gear that has of gear motor output shaft, with slewing bearing inner circle meshing, be convenient for drive rotary platform and rotate, the center still is provided with the air pump in the vacuum operation panel for the evacuation, be provided with the trachea that has the manometer between air pump and any gas pocket, be convenient for observe trachea pressure through the manometer.
Further, bond between sealing washer and the rotary platform, form the seal groove between two sealing washer, the seal groove intercommunication one connect the gas pocket, a plurality of gas pockets are the style of calligraphy and arrange, and the work piece covers after the sealing washer, is convenient for seal the seal groove.
Further, compress tightly frame bottom anchor is provided with the lifting module in the ground above the frame, the lifting module is connected compress tightly the subassembly, be convenient for drive compress tightly the subassembly and reciprocate, compress tightly the frame below and set up height sensor, be convenient for control compress tightly the elevating position of subassembly, guarantee to apply suitable pressure to the work piece.
Further, the pressing component is connected with the lifting module through a connecting arm, the connecting arm and the pressing frame are vertically arranged, one end of the connecting arm horizontally extends to the upper part of the rotating platform and is connected with the pressing disc in a switching mode, and a slewing bearing is arranged between the connecting arm and the pressing disc to facilitate the passive rotation of the pressing disc;
the compressing disc comprises a central disc, telescopic supporting rods and a circular end ring, wherein a plurality of telescopic supporting rods are arranged on the central disc in the circumferential direction, the central disc is detachably connected with the end ring through the telescopic supporting rods, and the central disc and the end ring are coaxially distributed inside and outside the end ring, so that the diameter of the compressing disc can be conveniently adjusted.
Further, the spraying motor is arranged at the center above the spraying frame, an output shaft of the spraying motor is connected with the rotary rocker arm, the rotary rocker arm is convenient to drive to swing, one end of the rotary rocker arm horizontally extends outwards to be connected with the spraying mechanism, and the spraying mechanism comprises a lifting cylinder, a lifting plate controlled by the lifting cylinder, rolling brushes arranged at two ends of the lifting plate and a spray pipe.
Further, the visual detection frame is a triangular bracket, and each side of the visual detection frame is provided with the identification camera for identifying and photographing the leakage point welding seam.
Through the technical scheme, the invention has the beneficial effects that:
according to the invention, the air tightness of the welding seam is detected on the air tightness detection device, whether the air tightness of the welding seam is qualified or not can be detected in a pressure difference mode, the surface of the welding seam is coated with the developer aiming at the unqualified workpiece through the developer spraying device, then the position of the leakage point welding seam is found out by utilizing the visual imaging device, the defect of the welding seam is displayed, and the recognition and photographing are carried out, so that the repair statistics and defect analysis are facilitated, and the follow-up repair of the welding seam is facilitated.
According to the invention, the sealing rings with different sizes can be arranged on the rotary platform, the two sealing rings are matched with the air receiving holes, so that the air tightness detection of workpieces with different diameters can be adapted, meanwhile, the diameter of the pressing disc can be flexibly adjusted according to the diameters of the workpieces, so that the workpiece can be tightly clamped by the rotary platform and the pressing disc in a matched manner, the workpiece and the sealing rings are ensured to have no gap, and the detection accuracy is improved. The height sensor can detect the height of the pressing disc, so that proper pressing force of the pressing disc on the workpiece is ensured, the welding seam is not fractured, and the workpiece and the sealing ring can be tightly attached.
The developer spraying device can conveniently brush developer on workpieces with different diameters through the swinging of the rotary rocker arm, and meanwhile, one developer spraying device can serve a plurality of airtight detection devices on the periphery of the developer spraying device, so that the effect of large-scale and batch detection of the workpieces can be achieved.
Drawings
FIG. 1 is a schematic diagram of the overall structure of a welding seam detection device for a polar frame-polar plate or a mastoid plate of an alkaline water hydrogen production electrolytic tank.
FIG. 2 is a schematic diagram of an airtight detecting device of a welding seam detecting device of a polar frame-polar plate or a mastoid plate of an electrolytic tank for producing hydrogen from alkaline water.
FIG. 3 is a top view of a rotating platform of a welding seam detection device for a polar frame-polar plate or a mastoid plate of an alkaline water hydrogen production electrolytic tank.
FIG. 4 is a top view of a diameter adjustment structure of a hold-down plate of a welding seam detection device for a polar plate or a mastoid plate of an alkaline water hydrogen production electrolytic tank.
FIG. 5 is a schematic diagram of a developer spraying device of a welding seam detection device for a polar frame-polar plate or mastoid plate of an alkaline water hydrogen production electrolytic tank.
FIG. 6 is a schematic diagram of a visual imaging device of a welding seam detection device for a polar frame-polar plate or mastoid plate of an alkaline water hydrogen production electrolytic tank.
The reference numerals in the drawings are: the device comprises a 1 airtight detection device, a 2 airtight detection mechanism, a 21 vacuum operation table, a 22 rotary platform, a 3 pressing mechanism, a 31 pressing frame, a 32 pressing component, a 321 connecting arm, a 322 pressing disc, a 33 height sensor, a 4 imaging agent spraying device, a 41 spraying frame, a 42 rotary rocker arm, a 43 spraying mechanism, a 431 lifting cylinder, a 432 lifting plate, a 433 rolling brush, a 434 spray pipe, a 5 visual imaging device, a 51 visual detection frame, a 52 fluorescent lamp, a 53 identification camera, a 6 gear motor, a 7 air connection hole, an 8 sealing ring, a 9 sealing groove, a 10 lifting module, a 11 central disc, a 12 telescopic supporting rod, a 121 fixing rod, a 122 adjusting rod, a 123 bolt hole, a 13 end ring and a 14 spraying motor.
Detailed Description
The following detailed description of specific embodiments of the invention refers to the accompanying drawings:
as shown in figures 1-6, the welding seam detection device of the electrode frame-electrode plate or the mastoid plate of the alkaline water hydrogen production electrolytic tank comprises an airtight detection device 1 for detecting the tightness of a welding seam of a workpiece, a developer spraying device 4 for applying developer to the welding seam of the workpiece and a visual imaging device 5 for identifying specific leakage points of the welding seam, wherein the workpiece is a product obtained by welding the electrode plate or the mastoid plate and the electrode frame, the workpiece is circular, and the welding seam is naturally a circular welding track.
The airtight detecting device 1 includes an airtight detecting mechanism 2 and a pressing mechanism 3 arranged in parallel. The airtight detecting mechanism 2 includes a vacuum operation table 21 and a circular rotary table 22 rotatably provided above the vacuum operation table 21, and a slewing bearing is provided between the vacuum operation table 21 and the rotary table 22 when the rotary table 22 is mounted, and an inner ring of the slewing bearing is connected to the rotary table 22 while being in a ring shape, and the rotary table 22 further includes a rotary base.
In order to realize the rotation of the rotary platform 22, a gear motor 6 is further arranged in the vacuum operation platform 21, a gear is arranged on an output shaft of the gear motor 6, and the gear motor 6 can be meshed with the inner ring of the slewing bearing, and the gear motor 6 can drive the inner ring of the slewing bearing to rotate, so that the rotary platform 22 is driven, and the rotary platform 22 is used for bearing a workpiece.
The rotary platform 22 is provided with a plurality of air receiving holes 7 which are distributed along the radial direction of the rotary platform 22 at intervals, and the plurality of air receiving holes 7 are distributed in a straight line. The rotary platform 22 is further detachably provided with two sealing rings 8 which are concentrically arranged, a sealing groove 9 is formed between the two sealing rings 8, and the sealing rings 8 and the rotary platform 22 are mounted in an adhesion mode, so that the sealing rings 8 are convenient to detach. Any air-receiving hole 7 is arranged between the two sealing rings 8, and the sealing groove 9 is communicated with one air-receiving hole 7.
The upper surface of the rotary platform 22 is a plane, on which two sealing rings 8 are bonded, the diameters of the two sealing rings 8 are variable and have different dimensions, the sealing rings 8 with the corresponding dimensions are selected according to the diameters of the workpieces, the two sealing rings 8 are needed for the air tightness detection of one workpiece, and one air receiving hole 7 is corresponding to the two sealing rings 8.
When the workpiece is covered on the two sealing rings 8, the welding seam of the workpiece is positioned between the two sealing rings 8, at the moment, the workpiece can seal the sealing groove 9, and the only opening of the sealing groove 9 is the air connecting hole 7. In order to realize the evacuation of seal groove 9, the center in vacuum operation panel 21 still is provided with the air pump for to the evacuation in the seal groove 9, is provided with the trachea that has the manometer between air pump and arbitrary gas pocket 7, not shown in the figure. The air pipe and the air receiving hole 7 are communicated by adopting a quick self-sealing joint, and the quick self-sealing joint has the characteristics of quick connection and self sealing. Because rotary platform 22 can drive the trachea and rotate, consequently air pump and trachea adopt rotary joint to communicate, just so can avoid the trachea to interfere rotary platform 22's rotation, can also guarantee the vacuum of seal groove 9 all the time.
The pressing mechanism 3 is used for applying downward pressure to the workpiece, ensuring the tightness of the pressing mechanism and the sealing ring 8, and the pressing mechanism 3 comprises a vertical pressing frame 31, a pressing assembly 32 sliding up and down along the pressing frame 31 and a height sensor 33 for detecting the lifting of the pressing assembly 32.
The bottom of the pressing frame 31 is anchored on the ground, so as to realize the up-and-down lifting of the pressing assembly 32, a lifting module 10 is arranged above the pressing frame 31, the lifting module 10 adopts a screw rod linear module, the lifting module 10 is connected with the pressing assembly 32, and then the pressing assembly 32 is conveniently driven to move up and down.
The compressing component 32 comprises a connecting arm 321 and a compressing disc 322 which is rotatably arranged below the connecting arm 321 and has an adjustable diameter, the compressing component 32 is connected with the lifting module 10 through the connecting arm 321, the connecting arm 321 and the compressing frame 31 are vertically arranged, one end of the connecting arm 321 horizontally extends to the upper part of the rotating platform 22 and is connected with the compressing disc 322 in a switching mode, a slewing bearing is arranged between the connecting arm 321 and the compressing disc 322, rotation of the compressing disc 322 is achieved, and the compressing disc 322 is used for compressing the position near a welding seam of a workpiece.
The pressing plate 322 is coaxially arranged above the rotary platform 22, and the diameter adjusting structure of the pressing plate 322 is as follows: the pressing disc 322 comprises a central disc 11, telescopic support rods 12 and an annular end ring 13, four telescopic support rods 12 are arranged on the central disc 11 in the circumferential direction, the central disc 11 is detachably connected with the end ring 13 through the four telescopic support rods 12, the central disc 11 and the end ring 13 are coaxially arranged inside and outside, and the end ring 13 can press the vicinity of a welding seam of a workpiece but does not cover the welding seam.
Here, the telescopic stay 12 includes a fixing rod 121 and an adjusting rod 122, the fixing rod 121 is connected with the central disk 11 by bolts, a plurality of groups of bolt holes 123 are formed in the fixing rod 121, the adjusting rod 122 is connected with any group of bolt holes 123 by bolts, and then the length of the telescopic stay 12 can be adjusted. The end rings 13 have different dimensions, the matched end rings 13 are selected according to the circular dimensions formed by the end parts of the telescopic support rods 12, and the end rings 13 are mounted on the end parts of the adjusting rods 122 through bolts, so that the diameter of the pressing disc 322 is adjusted, and the purpose of adapting to workpieces with different diameters is achieved.
In order to realize the regulation to work piece compaction force, set up the altitude sensor 33 in the clamp frame 31 below, the altitude sensor 33 can monitor the clamp plate 322 and push down the distance, provides suitable downforce, guarantees that clamp plate 322 can compress tightly near the work piece welding seam all the time, but be unlikely to the fracturing welding seam, still guarantees work piece and sealing washer 8 close contact laminating simultaneously to prevent to produce the gap.
The air tightness detection device 1 can detect the quality of the welding seam of the workpiece, judge whether the air tightness of the welding seam is qualified, and if the air tightness is not qualified, adopt the developer spraying device 4 to carry out the next treatment so as to prepare for searching the leakage point of the welding seam.
The developer spraying device 4 includes a vertical spraying frame 41, a rotary rocker 42 rotatably provided above the spraying frame 41, and a spraying mechanism 43 provided at an end of the rotary rocker 42. In order to realize the rotation of the rotary rocker arm 42, a spraying motor 14 is arranged at the center above the spraying frame 41, the spraying motor 14 adopts a servo motor, the rotation angle of the spraying motor can be accurately controlled, and an output shaft of the spraying motor 14 is connected with the rotary rocker arm 42 so as to conveniently drive the rotary rocker arm 42 to rotate by taking the spraying frame 41 as the center.
One end of the rotary rocker arm 42 extends horizontally and outwards to the upper side of the rotary platform 22 and is connected with the spraying mechanism 43, the spraying mechanism 43 moves along with the rotary rocker arm 42 when the rotary rocker arm 42 swings, and the spraying mechanism 43 is used for spraying developer to the welding seam of the workpiece. The spraying mechanism 43 comprises a lifting air cylinder 431, a lifting plate 432 controlled by the lifting air cylinder 431, a rolling brush 433 and a spray pipe 434, wherein the rolling brush 433 and the spray pipe 434 are arranged at two ends of the lifting air cylinder 432, the lifting air cylinder 432 is connected to a piston rod of the lifting air cylinder 431, the spray pipe 434 adopts a bamboo joint pipe which can be bent and shaped at will, the spray pipe 434 is externally connected with a developer solution, an outlet of the spray pipe 434 faces the rolling brush 433, and the rolling brush 433 can rotate.
When the whole developer spraying device 4 is used, the rolling brush 433 is controlled to cover the welding seam position of the workpiece, after developer solution is introduced into the spray pipe 434, the developer solution is sprayed to the rolling brush 433, and the rolling brush 433 can brush the developer on the welding seam surface along with the rotation of the workpiece. The steering of the rotary rocker arm 42 can be adjusted by controlling the spray motor 14 so that workpieces of different sizes can be accommodated.
In order to realize batch detection of workpieces, a plurality of airtight detection devices 1 are circumferentially arranged on the circumferential side of the developer spraying device 4, the circumferential movement range of the rotary rocker arm 42 of one developer spraying device 4 can cover the plurality of airtight detection devices 1, namely one developer spraying device 4 can serve the plurality of airtight detection devices 1, each airtight detection device 1 can detect the airtight of welding seams of the workpieces, and the purpose of batch detection is achieved, and only one airtight detection device 1 is shown in the figure.
For unqualified workpieces in weld joint airtight detection, a visual imaging device 5 is needed to find a specific leakage point position of a weld joint after a developer is coated. The visual imaging apparatus 5 includes a visual inspection frame 51, an annular fluorescent lamp 52 provided in the middle of the visual inspection frame 51, and a plurality of recognition cameras 53 provided circumferentially on the peripheral side of the visual inspection frame 51. The visual inspection frame 51 is a triangle support, each side of the visual inspection frame 51 is provided with a recognition camera 53, the recognition cameras 53 are used for recognizing colors, and the number of the recognition cameras 53 is three.
The method comprises the following steps of: step 1, according to the diameter of a welded workpiece, two sealing rings 8 matched with the diameter of the workpiece are arranged on a rotary platform 22 in advance, and an air pipe is connected with air receiving holes 7 corresponding to the two sealing rings 8 through a quick self-sealing joint; the diameter of the pressing plate 322 is also pre-adjusted to match the diameter of the workpiece.
Step 2, placing the welded workpiece on the rotary platform 22, wherein the welding seam position of the workpiece is located between the two sealing rings 8, detecting and controlling the position of the pressing disc 322 by the pressing mechanism 3 through the lifting module 10 and the height sensor 33, and pressing the workpiece on the rotary platform 22 through the pressing disc 322, which is equivalent to tightly clamping the workpiece by the pressing disc 322 matched with the rotary platform 22, avoiding errors caused by gaps, and actively rotating the rotary platform 22 and passively rotating the pressing disc 322.
And 3, pumping air in the sealing groove 9 on the rotary platform 22 by the air pump until the pressure gauge displays that the welding line of the workpiece reaches a vacuum state and is maintained for a certain time, and if the pressure gauge does not display pressure difference change in the time, the air tightness detection of the welding line of the workpiece is qualified, and removing the workpiece from the rotary platform 22 after releasing the pressure. If the pressure gauge shows pressure difference change, the air tightness detection of the welding seam of the workpiece is unqualified.
For a defective work, the developer spraying device 4 is required to spray the developer: the gear motor 6 drives the rotary platform 22 to rotate at a constant speed, the workpiece is still continuously vacuumized, at the moment, the spraying mechanism 43 is driven to swing by the rotary rocker arm 42 through the spraying motor 14 to move above the welding seam of the workpiece, the rolling brush 433 contacts the welding seam after the lifting cylinder 431 acts, the spray pipe 434 sprays the developer to the spraying surface, the rolling brush 433 gradually and uniformly coats the welding seam with the developer for a circle along with the rotation of the workpiece, the developer spraying device 4 is withdrawn, and the rotary platform 22 stops rotating.
After the developer permeates for a certain time, the workpiece coated with the developer is moved out of the rotary platform 22 and placed above the visual detection frame 51, the workpiece is manually rotated to enable the fluorescent lamp 52 to continuously irradiate the welding seam, the leakage point developer is obviously and clearly developed, and the identification camera 53 is used for recording the photographing number of the leakage point welding seam for repairing statistics and defect analysis.
According to the invention, the tightness of the welding seam of the workpiece is detected by the airtight detection device 1 in a pressure difference mode, the workpiece with a leakage point on the welding seam is coated with the developer, the specific position of the leakage point welding seam is searched by the visual imaging device 5, and the leakage point welding seam is photographed and identified, so that the method can be used for repairing statistics and subsequent defect analysis, is convenient for subsequent repair welding operation, can complete the whole detection process for 2-3 minutes, and can greatly improve the detection efficiency.
The above-described embodiments are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention, so that all equivalent changes or modifications of the structure, characteristics and principles described in the claims should be included in the scope of the present invention.

Claims (7)

1. The welding seam detection device of the alkaline water hydrogen production electrolytic tank electrode frame-polar plate or mastoid plate is characterized by comprising an airtight detection device (1), a developer spraying device (4) and a visual imaging device (5);
the airtight detection device (1) comprises an airtight detection mechanism (2) and a pressing mechanism (3) which are arranged in parallel, the airtight detection mechanism (2) comprises a vacuum operation table (21) and a circular rotary platform (22) which is rotatably arranged above the vacuum operation table (21), a plurality of air receiving holes (7) which are radially and alternately arranged along the rotary platform (22) are formed in the rotary platform (22), two sealing rings (8) which are concentrically arranged are detachably arranged on the rotary platform (22), and any air receiving hole (7) is formed between the two sealing rings (8);
the compressing mechanism (3) comprises a vertical compressing frame (31), a compressing assembly (32) sliding up and down along the compressing frame (31) and a height sensor (33) for detecting the lifting of the compressing assembly (32), the compressing assembly (32) comprises a connecting arm (321) and a compressing disc (322) which is rotatably arranged below the connecting arm (321) and has an adjustable diameter, and the compressing disc (322) is coaxially arranged above the rotating platform (22);
the developer spraying device (4) comprises a vertical spraying frame (41), a rotary rocker arm (42) rotatably arranged above the spraying frame (41) and a spraying mechanism (43) arranged at the end part of the rotary rocker arm (42), and a plurality of airtight detection devices (1) are respectively arranged in the Zhou Cehuan directions of the developer spraying device (4); the visual imaging device (5) comprises a visual detection frame (51), a fluorescent lamp (52) arranged in the middle of the visual detection frame (51) and a plurality of identification cameras (53) which are circumferentially arranged on the periphery of the visual detection frame (51).
2. The welding seam detection device for the pole frame-pole plate or the mastoid plate of the alkaline water hydrogen production electrolytic tank according to claim 1, wherein a slewing bearing is arranged between the vacuum operation table (21) and the rotary platform (22), a gear motor (6) is arranged in the vacuum operation table (21), a gear is arranged on an output shaft of the gear motor (6) and meshed with an inner ring of the slewing bearing, an air pump is further arranged in the center of the vacuum operation table (21), and an air pipe with a pressure gauge is arranged between the air pump and any air receiving hole (7).
3. The welding seam detection device for the electrode frame-polar plate or the mastoid plate of the alkaline water hydrogen production electrolytic tank according to claim 1, wherein the sealing rings (8) are adhered to the rotary platform (22), a sealing groove (9) is formed between the two sealing rings (8), the sealing groove (9) is communicated with one gas receiving hole (7), and a plurality of gas receiving holes (7) are arranged in a straight line.
4. The welding seam detection device for the electrode frame-electrode plate or the mastoid plate of the alkaline water hydrogen production electrolytic tank according to claim 1, wherein the bottom of the pressing frame (31) is anchored on the ground, a lifting module (10) is arranged above the pressing frame (31), the lifting module (10) is connected with the pressing assembly (32), and the height sensor (33) is arranged below the pressing frame (31).
5. The welding seam detection device of the alkaline water hydrogen production electrolytic tank polar plate or the mastoid plate according to claim 4, wherein the pressing component (32) is connected with the lifting module (10) through a connecting arm (321), the connecting arm (321) and the pressing frame (31) are vertically arranged, one end of the connecting arm (321) horizontally extends to the upper part of the rotating platform (22) and is connected with the pressing disc (322) in a switching way, and a slewing bearing is arranged between the connecting arm (321) and the pressing disc (322);
the compressing disc (322) comprises a central disc (11), telescopic support rods (12) and a circular end ring (13), wherein a plurality of telescopic support rods (12) are arranged on the central disc (11) in the circumferential direction, the central disc (11) is detachably connected with the end ring (13) through the telescopic support rods (12), and the central disc (11) and the end ring (13) are coaxially distributed inside and outside.
6. The welding seam detection device for the polar frame-polar plate or the mastoid plate of the alkaline water hydrogen production electrolytic tank according to claim 1, wherein a spraying motor (14) is arranged at the center above the spraying frame (41), an output shaft of the spraying motor (14) is connected with the rotary rocker arm (42), one end of the rotary rocker arm (42) horizontally extends outwards to be connected with the spraying mechanism (43), and the spraying mechanism (43) comprises a lifting cylinder (431), a lifting plate (432) controlled by the lifting cylinder (431), rolling brushes (433) arranged at two ends of the lifting plate (432) and a spray pipe (434).
7. The welding seam detection device for the polar frame-polar plate or the mastoid plate of the alkaline water hydrogen production electrolytic tank according to claim 1, wherein the visual detection frame (51) is a triangular bracket, and each side of the visual detection frame (51) is provided with the identification camera (53).
CN202311313539.8A 2023-10-11 2023-10-11 Welding seam detection device for electrode frame-polar plate or mastoid plate of alkaline water hydrogen production electrolytic tank Pending CN117571229A (en)

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CN202311313539.8A CN117571229A (en) 2023-10-11 2023-10-11 Welding seam detection device for electrode frame-polar plate or mastoid plate of alkaline water hydrogen production electrolytic tank

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Application Number Priority Date Filing Date Title
CN202311313539.8A CN117571229A (en) 2023-10-11 2023-10-11 Welding seam detection device for electrode frame-polar plate or mastoid plate of alkaline water hydrogen production electrolytic tank

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN118989590A (en) * 2024-10-23 2024-11-22 山东海氢能源科技有限公司 Electrode plate welding equipment of electrolytic cell for producing hydrogen by water electrolysis
CN119354427A (en) * 2024-08-26 2025-01-24 杭州电子科技大学 An airtightness experimental device for detecting small leaks under multiple factors
CN120651436A (en) * 2025-08-21 2025-09-16 河北友联橡胶制品有限公司 Device and method for detecting performance of rubber sealing ring

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN119354427A (en) * 2024-08-26 2025-01-24 杭州电子科技大学 An airtightness experimental device for detecting small leaks under multiple factors
CN119354427B (en) * 2024-08-26 2025-10-21 杭州电子科技大学 An airtightness experimental device for detecting small leaks under multiple factors
CN118989590A (en) * 2024-10-23 2024-11-22 山东海氢能源科技有限公司 Electrode plate welding equipment of electrolytic cell for producing hydrogen by water electrolysis
CN120651436A (en) * 2025-08-21 2025-09-16 河北友联橡胶制品有限公司 Device and method for detecting performance of rubber sealing ring

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