CN209639908U - A kind of airtight leakage detection apparatus of girth joint being compatible with more specification inner liners - Google Patents
A kind of airtight leakage detection apparatus of girth joint being compatible with more specification inner liners Download PDFInfo
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- CN209639908U CN209639908U CN201920703933.5U CN201920703933U CN209639908U CN 209639908 U CN209639908 U CN 209639908U CN 201920703933 U CN201920703933 U CN 201920703933U CN 209639908 U CN209639908 U CN 209639908U
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- girth joint
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- inner liners
- detection apparatus
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Abstract
The utility model provides a kind of airtight leakage detection apparatus of the girth joint for being compatible with more specification inner liners, including two longitudinal moving mechanisms and the horizontal aligning guide that two longitudinal moving mechanisms can be driven close to each other in the horizontal direction or separate；Mobile mechanism is responsible for detecting a girth joint longitudinally in each, and the clamping lower arm of the clamping unit including scissor-like structure, two clamping limbs of clamping unit is arc-shaped, and the lower end of each clamping lower arm is hinged with a detection cover box；Detection cover box is connected to by suction gun pipeline with leak detector.Compared with the existing technology, the present apparatus can satisfy the circumference weld inspection of compatible more specification inner liners by the clamping unit of scissor-like structure, realize flexible demand design.The present apparatus is simple and compact for structure simultaneously, avoids that detection error is effectively reduced using complicated transmission mechanism.In addition, structure economics are reliable, repair and maintenance and the parts replacement of equipment are greatly facilitated, further promotes the development of the airtight industry of leaking hunting of water heater liner.
Description
Technical field
The utility model belongs to water heater liner air-leakage test technical field, is related to a kind of ring for being compatible with more specification inner liners
Weld joint air-tight leakage detection apparatus.
Background technique
Liner is the most crucial components of water heater, and the quality of air-tightness directly decides the service life of water heater.
As shown in Figure 1, water heater liner is generally by cylinder, both ends capping and nut are constituted, are formed using welding procedure, therefore water heater
The sealing leak detection of liner is concentrated mainly on each commissure.The airtight detection for how fast and accurately completing each weld seam is always
The key technology in water heater liner leak detection field.
The common leak hunting method of water heater liner has visual bubble method, vertical compression method of testing, differential pressure method of testing and indifferent gas
Body collecting method.Visual bubble method testing cost is low, and environmental requirement is not high, low but there are detection accuracy, easily occurs judging by accident etc. and lacks
Point.Although vertical compression detection quantitatively can hunt leak with differential pressure measuring, the specific location of leak source can not be determined.It is lazy
Property gas collection method in, helium mass spectrum leak detection method can accomplish quantitative detection and localization, and the reaction time is fast, and detection accuracy is high, but
It is that the testing cost of this method is higher, and the requirement for detection environment is stringenter, answers in water heater liner detection field
With less.The leak detection of nitrogen hydrogen is to be determined using the semiconductor-type gas sensor to hydrogen sensitive leak source, which inspection
It is high to survey precision, the reaction time is short, and testing cost is relatively low, and therefore, the detection mode is in water heater liner detection industry
It is interior more and more common.
The liner of different modes leaks hunting, and fast and accurately blocks to workpiece and positioning requirements are consistent.Currently, liner
Airtight detection there are mainly two types of method: one is Horizontal enclosed clamping tools, i.e., by side, capping is positioned liner, separately
Side capping is clamped, and is clamped so that liner be positioned, and the intake-outlet at top is sealed by lead screw and handwheel adjustment.
This mode only takes into account the closure of intake-outlet and sewage draining exit, carries out quantitative airtight detection, cannot achieve detection and localization.It is another
Kind method is vertical sealed clamping tool, i.e., is disposed vertically liner, and bottom is positioned by the profiling jig of capping, top
It is clamped using cylinder vertical depression.Meanwhile using rotating mechanism and electric cylinders, the inspection to girth joint and vertical welded seam is realized
It surveys.But since there are dimensional discrepancys for the manufacturing process of liner, cause the vertical centering of which poor.Moreover, girth joint
Detection device is excessively complicated, and for the liner of different size, the time of remodeling is long, and maintenance is difficult.Pass through point of both the above method
How analysis accomplishes that same set of leak detection tool equipment compatibility is more it is found that how fast and accurately to complete the airtight test at liner girth joint
The liner of kind specification, is the technical problem in the field.
Utility model content
In view of this, the utility model is directed to a kind of airtight leakage detection apparatus of the girth joint for being compatible with more specification inner liners, tool
Body are as follows:
It includes two longitudinal moving mechanisms being integrally parallel to each other in the vertical direction；
Mobile mechanism is responsible for detecting a girth joint longitudinally in each comprising clamping unit, and drive clamping unit along vertical
To the lifting unit of lifting；
Clamping unit includes two clamping limbs, and two clamping limbs, which intersect and are articulated as one by pin shaft, forms scissor knot
Structure, pin shaft are fixed in positioning plate, two clamping limbs be located at be hinged with one between the upper end of the clamping upper arm above pin shaft can be along water
Square to flexible open-and-close mechanism；
The clamping lower arm that two clamping limbs are located at below pin shaft is arc-shaped, and the lower end of each clamping lower arm is hinged with a detection
Cover box；Detection cover box is connected to by suction gun pipeline with leak detector；
It further include horizontal aligning guide, the horizontal aligning guide can drive two longitudinal moving mechanisms in the horizontal direction
It is close to each other or separate.
Preferably, open-and-close mechanism is a folding cylinder, and the cylinder bottom and piston rod top end for opening and closing cylinder are respectively and in two clampings
It is hinged between the upper end of arm.
Preferably, the hinging pin shaft axle center for detecting the hinged axle center and two clamping limbs between cover box and clamping limb is mutually flat
Row.
Preferably, the lifting unit is fixed in using the screw-nut pair being driven by motor, the positioning plate of clamping unit
On screw.
Preferably, positioning plate is fixedly provided with above pin shaft prevents when open-and-close mechanism bounces back to most in short-term to limit clamping limb
Only its limited block around pin shaft deflection.
Preferably, guide roller is respectively provided at left and right sides of each detection cover box, when guide roller contradicts liner, detection cover
There are gaps between box and girth joint.
Preferably, the horizontal aligning guide includes carrying platform, servo motor, two synchronous pulleys, and two groups of slidings are led
Rail group；
Servo motor is fixedly mounted on the carrying platform, and two synchronous pulley rotational installations are below carrying platform and common
It is arranged a belt, servo motor connection drives a wherein synchronous pulley, the direction of travel of belt and the traveling side of slide rail group
To parallel, each slide rail group includes being fixed below carrying platform and being located at the Bilateral Symmetry of belt arranged on left and right sides to lead
Rail is slidably connected a connecting plate between two Bilateral Symmetry guide rails by sliding block, single by fixed plate and lifting below connecting plate
Member is affixed；
Left side belt between two synchronous pulleys is fixedly connected with the connecting plate of wherein one group of slide rail group, right side skin
Band is then fixedly connected with the connecting plate of another group of slide rail group.
It preferably, further include the positioning and clamping mechanism for clamping liner positioning.
Compared with the existing technology, the circumference weld inspection device of the utility model, can by designing specific clamping unit
The circumference weld inspection for meeting more specification inner liners of compatible different girth joint diameters and girth joint spacing realizes flexible demand design.
The apparatus structure is simple and compact simultaneously, avoids that detection error is effectively reduced using complicated transmission mechanism.In addition, structure economics
Reliably, repair and maintenance and the parts replacement of equipment are greatly facilitated, the hair of the airtight industry of leaking hunting of water heater liner is further promoted
Exhibition.
Detailed description of the invention
The attached drawing for constituting a part of the utility model is used to provide a further understanding of the present invention, this is practical new
The illustrative embodiments and their description of type are not constituteed improper limits to the present invention for explaining the utility model.In
In attached drawing:
Fig. 1 is the schematic diagram of liner 1；
Fig. 2 is the stereoscopic schematic diagram of single longitudinal moving mechanism；
Fig. 3 is circumference weld inspection status progression process schematic；
Fig. 4 mainly shows a kind of stereoscopic schematic diagram of structure type of horizontal aligning guide；
Fig. 5 is girth joint airtight leakage detection apparatus platform position schematic diagram.
Description of symbols:
Liner 1；Girth joint 2；Servo motor 3；Synchronous pulley 4；Bilateral Symmetry guide rail 5；Connecting plate 6；Fixed plate 7；Lead screw
Screw pair 8；Positioning plate 9；Open and close cylinder 10；Clamping limb 11；Clamp upper arm 111；Clamp lower arm 112；Pin shaft 113；Limited block 12；
Guide roller 13；Detect cover box 14；Suction gun pipeline 15.
Specific embodiment
It should be noted that in the absence of conflict, the feature in the embodiments of the present invention and embodiment can
To be combined with each other.
In the description of the present invention, it should be understood that term " center ", " longitudinal direction ", " transverse direction ", "upper", "lower",
The orientation or positional relationship of the instructions such as "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outside" is
It is based on the orientation or positional relationship shown in the drawings, is merely for convenience of describing the present invention and simplifying the description, rather than indicate
Or imply that signified device or element must have a particular orientation, be constructed and operated in a specific orientation, therefore cannot understand
For limitations of the present invention.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " is pacified
Dress ", " connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integrally
Connection；It can be mechanical connection, be also possible to be electrically connected；Can be directly connected, can also indirectly connected through an intermediary,
It can be the connection inside two elements.For the ordinary skill in the art, on being understood by concrete condition
State the concrete meaning of term in the present invention.
The airtight leak detection of girth joint of the compatible more specification inner liners of the present apparatus, below in conjunction with the structure and work of the Detailed description of the invention present apparatus
Make principle.
The present apparatus includes the longitudinal moving mechanism that two entirety is parallel to each other in the vertical direction；
Mobile mechanism is responsible for detecting a girth joint longitudinally in each comprising clamping unit and lifting unit；Lifting unit
Effect be drive clamping unit go up and down along longitudinal direction；
As shown in Fig. 2, clamping unit includes two clamping limbs 11, two clamping limbs 11 intersect and hinged by pin shaft 113
It is formed as one scissor-like structure, pin shaft 113 is fixed in positioning plate 9, and two clamping limbs are located at the clamping upper arm 111 above pin shaft
Upper end between be hinged with an open-and-close mechanism that can be stretched in the horizontal direction；Open-and-close mechanism can be selected various structures and realize gas along water
Square to flexible function, it is preferred that in the present embodiment, what open-and-close mechanism was selected is a folding cylinder 10, opens and closes the cylinder of cylinder
Bottom and piston rod top end are hinged between the upper end of two clamping upper arm 111 respectively；
The clamping lower arm 112 that two clamping limbs 11 are located at 113 lower section of pin shaft is arc-shaped, the lower end of each clamping lower arm 112
It is hinged with a detection cover box 14, detects the hinged axle center between cover box 14 and clamping limb 11 and the hinging pin shaft axle center of two clamping limbs
It is parallel to each other；By rationally designing the bending radius of clamping lower arm 112, it is compatible that the detection to more specification inner liners may be implemented.Inspection
It surveys cover box 14 to be connected to by suction gun pipeline 15 with leak detector, detection cover box 14 is used to absorb the nitrogen hydrogen mixeding gas of leak source.
Lifting unit can be selected various structures and realize by driving positioning plate 9 to go up and down along longitudinal direction, to drive clamping unit
It goes up and down along longitudinal direction；Preferably, as shown in Fig. 2, in the present embodiment, lifting unit using be driven by motor screw-nut pair 8 (or
Referred to as electric cylinders), positioning plate 9 is fixed on screw, and fixed plate 7 is used to screw-nut pair 8 being fixed on other component.
Single longitudinal moving mechanism detects the detection process of a girth joint are as follows:
Original state as shown in Figure 3: single longitudinal moving mechanism is located at the surface of girth joint, at this time open-and-close mechanism
(folding cylinder 10) is in retracted mode, and two detection cover box distances are minimum；Preferably, positioning plate 9 is in the upper of pin shaft 113
Side is fixedly provided with the limited block 12 to clamping limb limit, and when preventing original state, the deflection around pin shaft 13 occurs for clamping unit；
Lifting unit (screw-nut pair 8) is rotated by motor rotate driving lead screw, so that screw be driven to decline, is fixed on screw and is determined
Position plate 9 declines therewith, to make clamping unit decline, until the detection cover box 14 of left and right two is down to the surface of corresponding girth joint
And reach within the scope of detecting distance with girth joint close to distance, it is preferred that the left and right sides of each detection cover box 14 is respectively provided with
Guide roller 13 (as shown in Figure 2) contradicts liner by guide roller 13, both ensures to detect the distance between cover box and girth joint symbol
Testing requirements are closed, the distance can be also maintained, moreover it is possible to avoid detection cover box from being in contact when relatively moving with girth joint, reduce internal
The friction and damage of gallbladder exemplar, while can effectively avoid the local crownings defect such as welding slag；
Screw-nut pair 8 continues to drive clamping unit downwards, the driving gas source of folding cylinder 10 is closed, so that clamping limb 11
And folding cylinder 10 fully relies on the reaction force that clamping limb 11 is contacted with liner and slowly opens, in the guidance of guide roller 13
Under, detection cover box 14 carries out tracking detection close to liner girth joint 2.When detecting the detection of 14 tracking of cover box, suction gun pipeline 15 and inspection
Leakage instrument is also turned on, and carries out real-time detection and localization to leak source；
Referring to shown in Fig. 3, after reaching intermediate state, is provided in the driving mouth side that control folding cylinder 10 retracts and stablize pressure
Power promotes folding cylinder 10 to start to retract, carries out the detection of lower half circumferential ring weld seam；Until the final state of Fig. 3, left and right two
It detects cover box 14 and reaches liner lowermost end.
Mobile mechanism is responsible for detecting a girth joint of liner longitudinally in each, and there are two girth joints for liner tool, then need to be equipped with
Two longitudinal moving mechanisms, and the liner of different size, the spacing between two girth joints may be different, to adapt to two weld spacings
The detection of different liners, the present apparatus further include horizontal aligning guide, and the effect of horizontal aligning guide is to drive two longitudinal shiftings
Motivation structure is close to each other in the horizontal direction or separate, to adapt to the detection of the liner of different girth joint spacing；
Realize the optional multiple structural forms of horizontal aligning guide of above-mentioned function, it is preferred that structure provided in this embodiment
Form are as follows: as shown in figure 4, including 3, two carrying platform 31, servo motor synchronous pulleys 4, two groups of slide rail groups；Servo electricity
Machine 3 is fixedly mounted on carrying platform 3, and two synchronous pulleys are rotatablely installed below carrying platform 3 and are arranged jointly a belt,
Servo motor connection drives a wherein synchronous pulley 4, and the direction of travel of belt is parallel with the direction of travel of slide rail group, often
A slide rail group includes the Bilateral Symmetry guide rail 5 for being fixed on 31 lower section of carrying platform and being located at belt arranged on left and right sides, and two double
It is slidably connected a connecting plate 6 between side asymmetrical track 5 by sliding block, 6 lower section of connecting plate is affixed with fixed plate 7；
Left side belt between two synchronous pulleys is fixedly connected with the connecting plate 6 of wherein one group of slide rail group, right side
Belt is then fixedly connected with the connecting plate of another group of slide rail group, therefore, when servo motor 3 drives 4 up time of a synchronous pulley
Needle or when rotating counterclockwise, left and right sides belt drives two connecting plates respectively to drive two longitudinal moving mechanisms along horizontal
Displacement close to each other or separate is done in direction, is realized and is accurately positioned, adapts to the liner of different girth joint spacing.
The detection method of the present apparatus:
Step 1: as shown in figure 5, liner carries out positioning clamping by other auxiliary devices, require girth joint airtight at this time
The symmetrical centre face of leakage detection apparatus is overlapped with the median plane of liner.After the completion of positioning clamps, the airtight leakage detection apparatus of girth joint is horizontal
The servo motor 3 of aligning guide starts running, and according to liner concrete specification, operates certain stroke, so that two longitudinal shiftings
Corresponding two girth joints are accurately positioned in motivation structure one by one；
Step 2: as shown in figure 4, screw-nut pair 8 starts running, to drive clamping unit whole by positioning plate 9
Drop to original state, with liner girth joint top close to；
Step 3: screw-nut pair 8 continues to move down, and the driving gas source of folding cylinder 10 is closed, so that clamping limb 11
And folding cylinder 10 fully relies on the reaction force that clamping limb 11 is contacted with liner and slowly opens, in the guidance of guide roller 13
Under, detection cover box 14 carries out tracking detection close to liner girth joint.When detecting the detection of 14 tracking of cover box, suction gun pipeline 15 and leak detection
Instrument is also turned on, and carries out real-time detection and localization to leak source；
Step 4: as shown in figure 4, after reaching intermediate state, that is, the two sides intermediate point that cover box reaches liner girth joint is detected
Afterwards, steady pressure is provided in the driving mouth side that control folding cylinder 10 retracts, promotes folding cylinder 10 to start to retract, carries out down
The detection of semi-circumference girth joint.
Detection finishes, and clamping limb 11 is exited along initial track, and liner enters blanking procedure.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
Within the spirit and principle of utility model, any modification, equivalent replacement, improvement and so on should be included in the utility model
Protection scope within.
Claims (8)
1. a kind of airtight leakage detection apparatus of girth joint for being compatible with more specification inner liners, which is characterized in that in the vertical direction including two
The longitudinal moving mechanism being integrally parallel to each other；
Mobile mechanism includes clamping unit longitudinally in each, and the lifting unit for driving clamping unit to go up and down along longitudinal direction；
Clamping unit includes two clamping limbs, and two clamping limbs, which intersect and are articulated as one by pin shaft, forms scissor-like structure,
Pin shaft is fixed in positioning plate, two clamping limbs be located at be hinged with one between the upper end of the clamping upper arm above pin shaft can be along level side
To flexible open-and-close mechanism；
The clamping lower arm that two clamping limbs are located at below pin shaft is arc-shaped, and the lower end of each clamping lower arm is hinged with a detection cover
Box；Detection cover box is connected to by suction gun pipeline with leak detector；
It further include horizontal aligning guide, the horizontal aligning guide can drive two longitudinal moving mechanisms mutual in the horizontal direction
Close to or away from.
2. a kind of airtight leakage detection apparatus of girth joint for being compatible with more specification inner liners according to claim 1, which is characterized in that open
Closing mechanism is a folding cylinder, and cylinder bottom and the piston rod top end for opening and closing cylinder are hinged between the upper end of two clamping upper arm respectively.
3. a kind of airtight leakage detection apparatus of girth joint for being compatible with more specification inner liners according to claim 1, which is characterized in that inspection
The hinging pin shaft axle center in the hinged axle center and two clamping limbs surveyed between cover box and clamping limb is parallel to each other.
4. a kind of airtight leakage detection apparatus of girth joint for being compatible with more specification inner liners according to claim 1, which is characterized in that institute
Lifting unit is stated using the screw-nut pair being driven by motor, the positioning plate of clamping unit is fixed on screw.
5. a kind of airtight leakage detection apparatus of girth joint for being compatible with more specification inner liners according to claim 1, which is characterized in that fixed
Position plate is fixedly provided with above pin shaft most prevents it around pin shaft deflection clamping limb limit in short-term when open-and-close mechanism bounces back to
Limited block.
6. a kind of airtight leakage detection apparatus of girth joint for being compatible with more specification inner liners according to claim 1, which is characterized in that every
It is respectively provided with guide roller at left and right sides of a detection cover box, when guide roller contradicts liner, detects and is stayed between cover box and girth joint
There is gap.
7. a kind of airtight leakage detection apparatus of girth joint for being compatible with more specification inner liners according to claim 1, which is characterized in that institute
Stating horizontal aligning guide includes carrying platform, servo motor, two synchronous pulleys, two groups of slide rail groups；
Servo motor is fixedly mounted on the carrying platform, and two synchronous pulley rotational installations are in carrying platform lower section and are arranged jointly
One belt, servo motor connection drive a wherein synchronous pulley, the direction of travel and the direction of travel phase of slide rail group of belt
In parallel, each slide rail group includes being fixed on carrying platform lower section and the Bilateral Symmetry guide rail positioned at belt arranged on left and right sides, and two
It is slidably connected a connecting plate between a Bilateral Symmetry guide rail by sliding block, it is solid by fixed plate and lifting unit below connecting plate
It connects；
Left side belt between two synchronous pulleys is fixedly connected with the connecting plate of wherein one group of slide rail group, and right side belt is then
It is fixedly connected with the connecting plate of another group of slide rail group.
8. a kind of airtight leakage detection apparatus of girth joint for being compatible with more specification inner liners according to claim 1, which is characterized in that also
Including the positioning and clamping mechanism for clamping liner positioning.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920703933.5U CN209639908U (en) | 2019-05-16 | 2019-05-16 | A kind of airtight leakage detection apparatus of girth joint being compatible with more specification inner liners |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920703933.5U CN209639908U (en) | 2019-05-16 | 2019-05-16 | A kind of airtight leakage detection apparatus of girth joint being compatible with more specification inner liners |
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| CN209639908U true CN209639908U (en) | 2019-11-15 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110017947A (en) * | 2019-05-16 | 2019-07-16 | 天津博益气动股份有限公司 | A kind of airtight leakage detection apparatus of girth joint being compatible with more specification inner liners and detection method |
-
2019
- 2019-05-16 CN CN201920703933.5U patent/CN209639908U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110017947A (en) * | 2019-05-16 | 2019-07-16 | 天津博益气动股份有限公司 | A kind of airtight leakage detection apparatus of girth joint being compatible with more specification inner liners and detection method |
| CN110017947B (en) * | 2019-05-16 | 2024-04-26 | 天津博益气动股份有限公司 | Circumferential weld airtight leakage detection device compatible with multiple specifications of inner containers and detection method |
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