CN115307835A - Corrugated pipe helium leakage detection test device - Google Patents
Corrugated pipe helium leakage detection test device Download PDFInfo
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- CN115307835A CN115307835A CN202211236748.2A CN202211236748A CN115307835A CN 115307835 A CN115307835 A CN 115307835A CN 202211236748 A CN202211236748 A CN 202211236748A CN 115307835 A CN115307835 A CN 115307835A
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- Prior art keywords
- block
- bellows
- sealing
- rod
- stabilizer blade
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- 238000012360 testing method Methods 0.000 title claims abstract description 33
- 239000001307 helium Substances 0.000 title claims abstract description 31
- 229910052734 helium Inorganic materials 0.000 title claims abstract description 31
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 title claims abstract description 31
- 238000001514 detection method Methods 0.000 title claims abstract description 21
- 238000007789 sealing Methods 0.000 claims abstract description 98
- 239000003381 stabilizer Substances 0.000 claims description 46
- 230000007246 mechanism Effects 0.000 claims description 37
- 230000006835 compression Effects 0.000 claims description 4
- 238000007906 compression Methods 0.000 claims description 4
- 238000009826 distribution Methods 0.000 claims 1
- 238000000034 method Methods 0.000 description 10
- 230000008569 process Effects 0.000 description 7
- 230000009471 action Effects 0.000 description 5
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 238000012546 transfer Methods 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 239000000306 component Substances 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
Images
Classifications
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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
- G01M3/04—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
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- 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
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
The invention relates to the technical field of corrugated pipe testing, and particularly discloses a corrugated pipe helium leakage detection testing device which comprises a sealing cover and a corrugated pipe fixing tool, wherein the corrugated pipe fixing tool is arranged in the sealing cover and used for fixing a corrugated pipe, an inflation inlet, a pressure release valve, a pressure gauge and a concentration meter are arranged on the sealing cover, a vacuumizing guide pipe is arranged on the sealing cover, one end of the vacuumizing guide pipe is connected with the corrugated pipe, and the other end of the vacuumizing guide pipe is communicated to the outside of the sealing cover. The invention has the advantages of simple structure, easy realization, practical design and easy operation, meets various requirements of tests, can accurately obtain test data and provides safety guarantee for the quality of products.
Description
Technical Field
The invention relates to the technical field of corrugated pipe testing, in particular to a corrugated pipe helium leakage detection testing device.
Background
The steam generator is a key device of the fast reactor, and under the operation condition, the heat expansion difference is generated between the tube bundle and the shell of the evaporator and the superheater due to different temperatures. In order to absorb the thermal expansion difference between the tube bundle and the shell and reduce the thermal stress of the shell, the tube bundle and the tube-tube plate connecting joint, a thermal compensation device is arranged on the evaporator and the superheater shell. The heat compensation devices of the evaporator and the superheater adopt bellows expansion joints.
The corrugated expansion joint is used as a core component of a steam generator, the working environment is severe, the corrugated expansion joint used as a pressure element is used in a high-temperature and pressure-bearing working condition, in order to verify the safety performance of the corrugated pipe, the corrugated expansion joint is subjected to compactness detection, the standard requires that the helium leakage detection leakage rate is less than or equal to 6.7 multiplied by 10 < -10 > Pam < 3 >/s, the content of helium in the air accounts for 5.2 ppm, and for the corrugated pipe with extremely high detection precision requirement and large volume, proper test detection equipment is determined, so that the key for ensuring the accuracy and reliability of detection data is realized.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a test device for detecting helium leakage of a corrugated pipe.
The purpose of the invention is realized by the following technical scheme: the utility model provides a bellows helium leak testing test device, includes the fixed frock of sealed cowling and bellows, the fixed frock setting of bellows be in be used for fixed bellows in the sealed cowling, the sealed cowling on be provided with inflation inlet, relief valve, manometer and concentration meter, the sealed cowling on be provided with the evacuation pipe, the one end and the bellows of evacuation pipe are connected, the other end communicates to the outside of sealed cowling.
Specifically, the sealing cover in be provided with the bottom plate, the bottom plate on be provided with the slide rail, the fixed frock of bellows set up on the base, the bottom of base is provided with the slider, the slider with slide rail sliding connection.
Specifically, base bottom be provided with preceding stabilizer blade and back stabilizer blade, the bottom of preceding stabilizer blade and back stabilizer blade all be provided with the universal wheel, the top of preceding stabilizer blade and back stabilizer blade with the base is articulated, base bottom be provided with a plurality of stop gear, the top of preceding stabilizer blade and back stabilizer blade be provided with limit structure, it is a plurality of before stop gear cooperates the restriction with limit structure respectively the rotation of stabilizer blade and back stabilizer blade.
Specifically, the inflation inlet, the pressure release valve, the pressure meter and the concentration meter are oppositely distributed on the circumference of the sealing cover in an angle of 180 degrees.
The structure of the front supporting leg is the same as that of the rear supporting leg, the front supporting leg comprises two supporting legs and a cross rod, the middle parts of the two supporting legs are connected through the cross rod, the universal wheel is arranged at the bottom of each supporting leg, the limiting structure is arranged at the top of each supporting leg, a first reset mechanism and a second reset mechanism are arranged at the bottom of the base, the first reset mechanism comprises a first pull rod, a first push rod, a sleeve ring and a first reset spring, one end of the first pull rod is hinged to the cross rod of the front supporting leg, the other end of the first pull rod is hinged to the first push rod, the two sleeve rings are arranged at the bottom of the base, the first push rod is connected with the sleeve rings in a sliding mode, the first reset spring is sleeved on the first push rod between the two sleeve rings, a pressing block is arranged on the first push rod, the pressing block is arranged between the two sleeve rings, and one end of the first reset spring abuts against the pressing block; the second reset mechanism comprises a second pull rod, a second push rod sliding ring and a second reset spring, one end of the second pull rod is hinged to the cross rod of the rear supporting leg, the other end of the second pull rod is hinged to one end of the second push rod, the two sliding rings are coaxially arranged at the bottom of the base, the second push rod is connected with the two sliding rings in a sliding mode, the second reset spring is sleeved on the second push rod between the two sliding rings, a push block is arranged on the second push rod and located between the two sliding rings, and one end of the second reset spring abuts against the push block.
The limiting mechanism comprises a rotating shaft, a stop lever, a rotating wheel, a pull wire, a pressure spring, a piston and a cylinder barrel, wherein the rotating shaft is rotatably arranged at the bottom of the base, the rotating shaft is provided with two rotating wheels and two cylinder barrels, each cylinder barrel is arranged on the base corresponding to the support leg, the piston is slidably arranged in the cylinder barrel, the limiting structure is a limiting hole formed in the support leg, one end of the piston extends out of the cylinder barrel and is matched with the limiting hole, the cylinder barrel is internally provided with a limiting plate, the pressure spring is arranged in the cylinder barrel, the pressure spring is positioned between the piston and the limiting plate, the pull wire is sleeved with a sleeve, two ends of the sleeve are provided with fixing parts, one side of the base, which is positioned on the rotating wheel and the cylinder barrel, the fixing parts at two ends of the sleeve are respectively connected with the two mounting plates, one end of the pull wire is wound on the rotating wheel, the cylinder barrel is provided with a pull hole, and the other end of the pull wire penetrates through the pull hole and is connected with the piston.
Specifically, slider one end be provided with the V-arrangement guide block, the one end of V-arrangement guide block binding off and the spout intercommunication of slider, the V-arrangement guide block inner wall seted up the mounting groove, the mounting groove internal rotation be provided with a plurality of leading wheels, the one end that the slider is located the V-arrangement guide block is the arc.
Specifically, the bellows fixing tool comprises a plurality of screw rods, a pressing plate and a driving mechanism, wherein the pressing plate is provided with two screw rods, a plurality of sliding holes are formed in the pressing plate, one end of each screw rod is provided with a limiting table, one end of each screw rod is correspondingly connected with the screw rod and the pressing plate through a nut which penetrates through the sliding hole of the pressing plate in a threaded manner, the other end of each screw rod penetrates through the other sliding hole of the pressing plate and is connected with the driving mechanism, the driving mechanism drives the screw rods to move along the sliding holes, and one side, opposite to the pressing plate, is provided with a sealing structure.
Specifically, actuating mechanism include drive gear and driven gear, screw rod threaded connection have screw-nut, driven gear overlaps to be established screw-nut's outside, the coaxial drive shaft that is provided with of drive gear, it is a plurality of driven gear with drive gear meshes, the clamp plate on be provided with the casing, driven gear and drive gear spacing in the casing, the casing on be provided with drive arrangement, drive arrangement's output and drive shaft connection.
Specifically, seal structure including sealed piece and sealing washer, sealed piece fix on the clamp plate, sealed piece be the circular truncated cone structure, sealed piece outer wall be provided with annular seal groove, the sealing washer cover establish in the seal groove, the sealing washer be hollow structure, sealed piece in be provided with the air flue, the one end of air flue is through connecting and sealing washer intercommunication, the other end of air flue is provided with air inlet structure, air inlet structure include admission valve, connecting block and sealed head, the one end of air flue is the shoulder hole, be provided with pressure spring in the shoulder hole, pressure spring cover establish on the admission valve, admission valve on be provided with the ring platform, pressure spring's one end support on the ring platform, the other end supports on the step in the shoulder hole, the shoulder hole in be provided with the internal thread, the one end of connecting block be provided with the external screw thread, the connecting block with shoulder hole threaded connection is spacing in the shoulder hole with the admission valve, the connecting block be provided with the through-hole, admission valve one end is arranged in the through-hole, through-hole and admission valve between and the connecting block and the sealed head set up sealed pad.
The invention has the following advantages:
1. the leak detection test device can safely, reliably, accurately and efficiently test the compactness of the corrugated pipe, has high reasonability, safety and reliability in a detection test performed by the device, ensures that the corrugated pipe meets the running condition of an actual working condition in the test process, has a simple structure, is easy to realize, is practical in various designs and easy to operate, meets various requirements of the test, can accurately obtain test data, and provides safety guarantee for the quality of products.
Drawings
FIG. 1 is a schematic structural view of a sealing boot according to the present invention;
FIG. 2 is a schematic view of a bellows fixing tool of the present invention;
FIG. 3 is a schematic structural view of a limiting structure, a first reset mechanism and a second reset mechanism of the present invention;
FIG. 4 is a schematic view of a piston and a limiting hole structure according to the present invention;
FIG. 5 is a schematic view of the sealing block structure of the present invention;
FIG. 6 is an enlarged schematic view of the structure at A in FIG. 5;
in the figure: 1-sealing cover, 2-bottom plate, 3-sealing plate, 4-sliding rail, 5-base, 6-leg, 7-second pull rod, 8-second push rod, 9-second return spring, 10-sliding ring, 11-push block, 12-first pull rod, 13-first push rod, 14-collar, 15-first return spring, 16-press block, 17-stop rod, 18-universal wheel, 19-rotating shaft, 20-rotating wheel, 21-cross rod, 22-sleeve, 23-sliding block, 24-V-shaped guide block, 25-press plate, 26-screw rod, 27-corrugated pipe, 28-sealing block, 29-screw rod nut, 30-driven gear, 31-driving gear, 32-shell, 33-driving device, 34-sliding block, 35-piston, 36-limiting hole, 37-pressure spring, 38-limiting plate, 39-pull wire, 40-sealing ring, 41-air inlet valve, 42-connecting block, 43-pressing spring, 44-sealing head, 45-sealing gasket, 46-air duct.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
It is noted that relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Furthermore, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one of 8230, and" comprising "does not exclude the presence of additional like elements in a process, method, article, or apparatus comprising the element.
The invention will be further described with reference to the accompanying drawings, but the scope of protection of the invention is not limited to the following.
As shown in fig. 1-6, a helium leakage detection test device for a corrugated pipe 27 comprises a sealing cover 1 and a corrugated pipe 27 fixing tool, wherein the corrugated pipe 27 fixing tool is arranged in the sealing cover 1 and used for fixing the corrugated pipe 27, the sealing cover 1 is provided with an inflation inlet, a pressure release valve, a pressure gauge and a concentration meter, the sealing cover 1 is provided with a vacuumizing guide pipe, one end of the vacuumizing guide pipe is connected with the corrugated pipe 27, and the other end of the vacuumizing guide pipe is communicated to the outside of the sealing cover 1. In the embodiment, a sealing cover 1 is a tank body with an opening at one end, a sealing plate 3 is arranged at the opening to seal the sealing cover 1 to form a sealed cavity, a corrugated pipe 27 is placed in the sealing cover 1, helium is filled into the sealing cover 1 through an inflation inlet, the helium concentration and the gas pressure in the sealing cover 1 are detected through a pressure gauge and a concentration meter, two ends of the corrugated pipe 27 are sealed, one end of a vacuumizing guide pipe is communicated with the corrugated pipe 27, the other end of the vacuumizing guide pipe is connected with vacuumizing equipment and a helium mass spectrometer leak detector, the vacuumizing is stopped when the helium concentration is lower than 6.7 x 10 < -10 > Pam < 3 >/s through air in the corrugated pipe 27 to be detected, then a helium bottle is opened, the air is filled into the sealing cover 1 through an air inlet, when the value displayed by the pressure gauge and the concentration meter meets the standard requirement, the air pressure in the sealing cover 1 is stopped to be filled through a pressure release valve, and the compactness performance of a workpiece is detected by observing the helium mass spectrometer leak detector.
Further, a bottom plate 2 is arranged in the sealing cover 1, a sliding rail 4 is arranged on the bottom plate 2, the corrugated pipe 27 is fixed on the base 5, a sliding block 23 is arranged at the bottom of the base 5, and the sliding block 23 is connected with the sliding rail in a sliding mode. In this embodiment, a bottom plate 2 is horizontally arranged in the sealing cover 1, a slide rail 4 is arranged on the bottom plate 2, a base 5 is correspondingly arranged at the bottom of the corrugated pipe 27 fixing tool, and the corrugated pipe 27 is fixed on the corrugated pipe 27 fixing tool and then pushed into the sealing cover 1 through the matching of a slide block 23 on the base 5 and the slide rail 4.
Further, 5 bottoms of base be provided with preceding stabilizer blade and back stabilizer blade, the bottom of preceding stabilizer blade and back stabilizer blade all be provided with universal wheel 18, the top of preceding stabilizer blade and back stabilizer blade with base 5 is articulated, 5 bottoms of base be provided with a plurality of stop gear, the top of preceding stabilizer blade and back stabilizer blade be provided with limit structure, it is a plurality of before stop gear cooperates the rotation of restriction preceding stabilizer blade and back stabilizer blade with limit structure respectively. Before an experiment, the corrugated pipe 27 needs to be fixed on a corrugated pipe 27 fixing tool and the corrugated pipe 27 needs to be sealed, the operation is completed outside the sealing cover 1, the diameter and the volume of the corrugated pipe 27 used for the experiment are large in the embodiment, the weight is heavy, the corrugated pipe 27 needs to be transferred into the sealing cover 1 after being fixed on the corrugated pipe 27 fixing tool, in order to facilitate the transfer, a front support leg and a rear support leg are arranged at the bottom of the base 5 to support the base 5, universal wheels 18 are arranged at the bottoms of the front support leg and the rear support leg to facilitate the transfer of the corrugated pipe 27 fixing tool, after the corrugated pipe 27 is fixedly arranged on the corrugated pipe 27 fixing tool, the corrugated pipe 27 is moved to an opening of the sealing cover 1 through the transfer corrugated pipe 27 fixing tool, and then the sliding block 23 is aligned with the sliding rail 4, just so can push the fixed frock of bellows 27 in the sealed cowling 1 through the cooperation of slider 23 and slide rail 4, need pack up preceding stabilizer blade and back stabilizer blade when pushing the fixed frock of bellows 27 in the sealed cowling 1, this embodiment is provided with stop gear in the bottom of base 5, the upper end with preceding stabilizer blade and back stabilizer blade is articulated with base 5, preceding stabilizer blade and back stabilizer blade can rotate like this and pack up, the top of stabilizer blade and back stabilizer blade in the front is provided with limit structure with stop gear complex, it is spacing to rotate preceding stabilizer blade and back stabilizer blade through stop gear and limit structure, before spacing back stabilizer blade and back stabilizer blade can not rotate, before stabilizer blade and back stabilizer blade just can rotate after stop gear breaks away from the cooperation with limit structure, thereby pack up preceding stabilizer blade and back stabilizer blade, place the fixed frock of bellows 27 in the sealed cowling 1 in the aspect of this way.
Further, the inflation inlet and the relief valve and the manometer and the concentration meter are oppositely distributed on the circumference of the sealing cover 1 at 180 degrees. In the embodiment, the pressure gauge and the concentration meter are positioned at the lower part of the center of the sealing cover 1, and because the helium has lower density than air, the concentration of the helium filled into the sealing cover 1 is higher at the upper part, and in order to meet the requirement of the test on the helium concentration, a concentration detector is arranged at the lower part, so that when the helium concentration at the lower part meets the standard requirement, the total concentration in the sealing cover 1 is ensured to meet the standard requirement.
Further, the front support leg and the rear support leg have the same structure, the front support leg comprises two support legs 6 and a cross bar 21, the middle parts of the two support legs 6 are connected through the cross bar 21, the universal wheel 18 is arranged at the bottom of the support legs 6, the limiting structure is arranged at the top of the support legs 6, the bottom of the base 5 is provided with a first reset mechanism and a second reset mechanism, the first reset mechanism comprises a first pull rod 12, a first push rod 13, a sleeve ring 14 and a first reset spring 15, one end of the first pull rod 12 is hinged to the cross bar 21 of the front support leg, the other end of the first pull rod is hinged to the first push rod 13, the two sleeve rings 14 are arranged at the bottom of the base 5, the first push rod 13 is slidably connected with the sleeve rings 14, the first reset spring 15 is sleeved on the first push rod 13 between the two sleeve rings 14, the first push rod 13 is provided with a press block 16, the press block 16 is arranged between the two sleeve rings 14, and one end of the first reset spring 15 is abutted to the press block 16; the second reset mechanism comprises a second pull rod 7, a second push rod 8, a sliding ring 10 and a second reset spring 9, one end of the second pull rod 7 is hinged to the cross rod 21 of the rear supporting leg, the other end of the second pull rod 7 is hinged to one end of the second push rod 8, the two sliding rings 10 are coaxially arranged at the bottom of the base 5, the second push rod 8 is connected with the two sliding rings 10 in a sliding mode, the second reset spring 9 is sleeved on the second push rod 8 between the two sliding rings 10, a push block 11 is arranged on the second push rod 8, the push block 11 is located between the two sliding rings 10, and one end of the second reset spring 9 abuts against the push block 11. In the embodiment, two connecting lugs are respectively arranged on two sides of a base 5, two supporting legs 6 of a front supporting leg and two supporting legs 6 of a rear supporting leg are respectively hinged with the corresponding connecting lugs, when a corrugated pipe 27 fixing tool is pushed into a sealing cover 1, a limiting mechanism is contacted with a bottom plate 2 to separate the limiting mechanism from the limiting structure, so that in the pushing process of the corrugated pipe 27 fixing tool, the supporting legs 6 of the limiting front supporting leg of the bottom plate 2 rotate around a hinged point, when the supporting legs 6 rotate, a cross rod 21 is driven to push a first pull rod 12, the first pull rod 12 pushes the first push rod 13 to move along the axial direction of the first push rod, when the first push rod 13 moves, a press block 16 arranged on the first push rod 13 extrudes a first reset spring 15 to compress the first reset spring, and finally the front supporting leg is attached to the bottom of the base 5, and then the same, when the corrugated pipe 27 fixing tool is continuously pushed into the sealing cover 1, the limiting mechanism for limiting the rear support leg is separated from the limiting structure for limiting the rear support leg, so that the rear support leg rotates around the hinge point, the transverse rod 21 of the rear support leg pulls the second pull rod 7, the second pull rod 8 is pulled by the second pull rod 7 to move axially, the push block 11 presses the second return spring 9 to compress the second push rod 8 in the moving process of the second push rod 8, the rear support leg is attached to the bottom of the base 5, the universal wheels 18 of the front support leg and the rear support leg are attached to the bottom plate 2, the rear support leg loses the limit of the bottom plate 2 firstly when the corrugated pipe 27 fixing tool is pushed out, the second push rod 8 is pushed to move axially under the reset of the second return spring 9 to push the second push rod 8 to push the second pull rod 7, the second pull rod 7 pushes the transverse rod 21 of the rear support leg to rotate the rear support leg along the hinge point, and a limiting block is arranged on the rotating path of the rear support leg to limit the rotating angle of the rear support leg, therefore, the rear support leg can not rotate when being pushed to the limit position, the first reset spring 15 drives the first push rod 13 to move axially when the corrugated pipe 27 fixing tool continues to be pulled out, so that the first pull rod 12 is driven to push the cross rod 21 of the front support leg to rotate the front support leg, and similarly, a limit block is arranged on a rotating path of the rear support leg to limit the rotating angle of the front support leg, so that the front support leg can not rotate when being pulled out, the limit mechanism can be matched with the limit structure of the front support leg to limit the rotation of the front support leg when the corrugated pipe 27 fixing tool continues to be moved, so that stable support is formed, the front support leg and the rear support leg can be automatically retracted when the corrugated pipe 27 fixing tool is pushed into the sealing cover 1 by adopting the scheme, and the front support leg and the rear support leg can automatically pop out when the corrugated pipe 27 fixing tool is pulled out, so that the test is convenient.
Further, the limiting mechanism comprises a rotating shaft 19, a stop lever 17, rotating wheels 20, pull wires 39, pressure springs 37, a piston and a cylinder 34, the rotating shaft 19 is rotatably arranged at the bottom of the base 5, the rotating shaft 19 is provided with two rotating wheels 20, each supporting leg 6 corresponds to the base 5 on which the cylinder 34 is arranged, the piston is slidably arranged in the cylinder 34, the limiting structure is a limiting hole 36 arranged on the supporting leg 6, one end of the piston extends out of the cylinder 34 and is matched with the limiting hole 36, a limiting plate 38 is arranged in the cylinder 34, the pressure springs 37 are located between the piston and the limiting plate 38, the outer portion of the pull wires 39 is sleeved with a sleeve 22, the two ends of the sleeve 22 are provided with fixing portions, one sides of the base 5, which are located on the rotating wheels 20 and the cylinder 34, the fixing portions at the two ends of the sleeve 22 are respectively connected with the two mounting plates, one ends of the pull wires 39 are wound on the rotating wheel 20, a pull hole is arranged on the cylinder 34, and the other end of the pull wire 39 passes through the pull hole and is connected with the piston. In the embodiment, the rotating shaft 19 is rotatably arranged at the bottom of the base 5 through a bearing seat, a torsional spring is arranged on the rotating shaft 19, the blocking rod 17 is in a vertical state at an initial position, the blocking rod 17 drives the rotating shaft 19 to rotate due to the limit of the bottom plate 2 when the corrugated pipe 27 fixing tool is pushed inwards towards the sealing cover 1, two ends of the sleeve 22 are fixed on the mounting plate, one end of the stay wire 39 is fixed on the rotating wheel 20, the rotating wheel 20 is driven to rotate when the rotating shaft 19 rotates, the stay wire 39 is wound on the rotating wheel 20 due to the rotation of the rotating wheel 20, the stay wire 39 can be pulled through the rotating wheel 20, the cylinder barrel 34 is arranged between the top of the supporting leg 6 and the base 5, a guide wheel is arranged in the cylinder barrel 34, one end of the stay wire 39 penetrates into the cylinder barrel 34 through a pull hole and then is wound on the guide wheel and then connected with a piston, the piston extends out of the cylinder barrel 34 to be inserted into a limit hole 36 of the supporting leg 6 at initial time, the piston is pulled through the stay wire 39, the piston moves along the axial position of the cylinder 34 and compresses the pressure spring 37, so that one end of the piston retracts into the cylinder 34, the supporting leg 6 loses the limit of the piston and can rotate, the stop lever 17 loses the limit of the bottom plate 2 when the corrugated pipe 27 fixing tool is pulled out of the sealing cover 1 and then drives the rotating shaft 19 to rotate and reset under the action of the torsion spring, the rotating shaft 19 drives the rotating wheel 20 to rotate to enable the pull wire 39 to loosen, so that the piston extends out of the cylinder 34 and extends into the limit hole 36 of the supporting leg 6 to limit the supporting leg 6 under the action of the restoring force of the pressure spring 37, the limiting mechanism can be triggered when the corrugated pipe 27 fixing tool is pushed into the sealing cover 1 by adopting the technical scheme, the matching between the limiting mechanism and the limit hole 36 is disconnected, the operation is simple, and the limiting mechanism resets and can limit the supporting leg 6 when the corrugated pipe 27 fixing tool is pushed out.
Further, slider 23 one end be provided with V-arrangement guide block 24, the one end that V-arrangement guide block 24 closed up communicates with the spout of slider 23, 24 inner walls of V-arrangement guide block seted up the mounting groove, the mounting groove internal rotation be provided with a plurality of leading wheels, the one end that slider 23 is located V-arrangement guide block 24 is the arc. In this embodiment, for convenience, the sliding block 23 is connected with the sliding rail 4 in a matched manner, the V-shaped guide block 24 is arranged on the base 5 at one end of the sliding block 23, guiding is performed through the V-shaped guide block 24, during use, the corrugated pipe 27 fixing tool is pushed to the position where the V-shaped guide block 24 corresponds to the sliding rail 4, then the corrugated pipe 27 fixing tool is pushed to enable the V-shaped guide block 24 to be close to the sliding rail 4, the corrugated pipe 27 fixing tool is pushed forwards to enable the V-shaped guide block 24 to be abutted to the sliding rail 4, the sliding block 23 is matched with the sliding rail 4 under the guide of the guide wheel on the inner wall of the V-shaped guide block 24, and the corrugated pipe 27 fixing tool is conveniently pushed into the sealing cover 1.
Further, the fixed frock of bellows 27 include many screw rods 26, clamp plate 25 and actuating mechanism, clamp plate 25 be provided with two, be provided with a plurality of slide openings on the clamp plate 25, the one end of screw rod 26 is provided with spacing platform, the one end of screw rod 26 corresponds the slide opening threaded connection nut that passes a clamp plate 25 with screw rod 26 and clamp plate 25 fixed connection, the screw rod 26 other end pass another the slide opening of clamp plate 25 is connected with actuating mechanism, drives screw rod 26 through actuating mechanism and removes along the slide opening, two one side that clamp plate 25 is relative all is provided with seal structure. In this embodiment, four screw rods 26 are preferably provided, two pressing plates 25 are disposed oppositely, the pressing plates 25 are disposed vertically, sliding blocks may be disposed at bottoms of the pressing plates 25, corresponding sliding ways are disposed on the base 5, the sliding blocks are in sliding fit with the sliding ways, sliding grooves are axially disposed on the screw rods 26, protruding blocks matched with the sliding grooves are disposed in the sliding holes, the two pressing plates 25 are disposed at two ends of the corrugated pipe 27, the screw rods 26 are driven by a driving mechanism to move axially to enable the two pressing plates 25 to move oppositely, finally, a sealing structure on the pressing plates 25 is pressed at two ends of the corrugated pipe 27 to form a seal, and one end of the vacuum-pumping conduit is communicated with the interior of the corrugated pipe 27 through the pressing plates 25.
Further, actuating mechanism include drive gear 31 and driven gear 30, screw rod 26 threaded connection have screw-nut 29, driven gear 30 cover is established screw-nut 29's outside, drive gear 31 coaxial be provided with the drive shaft, it is a plurality of driven gear 30 with drive gear 31 meshes, clamp plate 25 on be provided with casing 32, driven gear 30 and drive gear 31 spacing in casing 32, casing 32 on be provided with drive arrangement 33, drive arrangement 33's output and drive shaft are connected. The driving device 33 in this embodiment may be a self-locking motor, an output end of the self-locking motor is connected to the driving shaft, the driving shaft is driven to rotate by the self-locking motor, so as to drive the driving gear 31 to rotate, the driving gear 31 rotates to drive the four driven gears 30 to rotate, the driven gears 30 rotate to drive the screw rod nut 29 to rotate, the screw rod nut 29 is axially limited, so that the screw rod 26 can axially move by the rotation of the screw rod nut 29, and the two pressing plates 25 move in opposite directions.
Further, seal structure including sealed piece 28 and sealing washer 40, sealed piece 28 fix on the clamp plate 25, sealed piece 28 be the circular truncated cone structure, sealed piece 28 outer wall be provided with annular seal groove, sealing washer 40 cover establish in the seal groove, sealing washer 40 be hollow structure, sealed piece 28 in be provided with air flue 46, air flue 46's one end is passed through joint and sealing washer 40 intercommunication, air flue 46's the other end is provided with air inlet structure, air inlet structure include admission valve 41, connecting block 42 and sealed head 44, air flue 46's one end is the shoulder hole, be provided with pressure spring 43 in the shoulder hole, pressure spring 43 cover establish on admission valve 41, admission valve 41 on be provided with the shoulder, pressure spring 43's one end support on the shoulder, the other end support on the shoulder hole, the shoulder hole in be provided with the internal thread, connecting block 42's one end is provided with shoulder hole threaded connection with admission valve 41 is spacing in downthehole, connecting block 42 be provided with the through-hole, 41 one end is arranged in the admission valve 41, sealed joint block 42 is provided with sealed joint ring 44 between admission valve and the shoulder hole, sealed joint 44 is provided with sealed head 44. The sealing block 28 of this embodiment is fixed on the pressing plate 25 by bolts, the sealing block 28 is designed to be a tapered structure, when the two pressing plates 25 move towards each other, the sealing block 28 is inserted into the inner cavities at the two ends of the corrugated tube 27, and in the process of the two pressing plates 25 moving towards each other, the outer wall of the sealing block 28 is attached to the inner wall of the corrugated tube 27 to form a seal, in order to make the seal more stable, in this embodiment, a sealing groove is arranged on the outer wall of the sealing block 28, a sealing ring 40 is sleeved in the sealing groove, then high-pressure gas is introduced into the sealing ring 40 through an air inlet structure to expand the sealing ring 40, so that the sealing ring 40 is pressed between the sealing block 28 and the inner wall of the corrugated tube 27 to form a seal, because the corrugated tube 27 needs to be vacuumized, so that the pressure difference between the inside of the sealing ring 40 and the inside of the corrugated tube 27 is increased, so that the sealing ring 40 is further expanded, so that the higher the vacuum degree inside the corrugated tube 27 is the sealing strength of the sealing ring 40 is higher, the pressure is increased after the sealing cover 1 is filled with helium, because the bellows 27 is in a vacuum state, leakage is easily caused, after the sealing ring 40 is arranged, the sealing strength can be improved, thereby improving the accuracy of the test, in the embodiment, the air passage 46 is arranged on the sealing head 44, air is introduced into the sealing ring 40 through the air passage 46, one end of the air passage 46 inflates and deflates the sealing ring 40 through the air inlet structure, the air inlet valve 41 is arranged in the stepped hole, the connecting block 42 is in threaded connection with the stepped hole, the through hole of the connecting block 42 is also the stepped hole, the step of the through hole is matched with the ring platform of the air inlet valve 41 to press the air inlet valve 41 in the stepped hole and compress the compression spring 43, the sealing rubber ring is arranged between the through hole and the air inlet valve 41, and the sealing rubber ring is arranged between the connecting block 42 and the stepped hole to seal the stepped hole, meanwhile, in order to seal the air inlet valve 41, in this embodiment, a sealing head 44 is connected to one end of the connecting block 42 through a thread, a blind threaded hole is formed in the sealing head 44, a sealing gasket 45 is arranged at the bottom of the blind threaded hole, and the sealing head 44 is connected with the connecting block 42 through the thread, so that the sealing gasket 45 is pressed against the through hole to seal the through hole, and thus the air inlet valve 41 can be sealed.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way. Those skilled in the art can make many possible variations and modifications to the disclosed solution, or modify equivalent embodiments using the teachings presented above, without departing from the scope of the claimed solution. Therefore, any modification, equivalent change and modification made to the above embodiments according to the technology of the present invention are within the protection scope of the present invention, unless the content of the technical solution of the present invention is departed from.
Claims (10)
1. The utility model provides a bellows helium leak testing test device which characterized in that: including sealed cowling (1) and the fixed frock of bellows, the fixed frock setting of bellows be used for fixed bellows (27) in sealed cowling (1), sealed cowling (1) on be provided with inflation inlet, relief valve, manometer and concentration meter, sealed cowling (1) on be provided with the evacuation pipe, the one end and the bellows (27) of evacuation pipe are connected, the other end communicates to the outside and the evacuation equipment and the helium mass spectrometer leak detector of sealed cowling (1) and is connected.
2. The bellows helium leak detection test device of claim 1, wherein: the corrugated pipe fixing tool is characterized in that a bottom plate (2) is arranged in the sealing cover (1), a sliding rail (4) is arranged on the bottom plate (2), the corrugated pipe fixing tool is arranged on a base (5), a sliding block (23) is arranged at the bottom of the base (5), and the sliding block (23) is in sliding connection with the sliding rail (4).
3. The bellows helium leak detection test device of claim 2, wherein: base (5) bottom be provided with preceding stabilizer blade and back stabilizer blade, the bottom of preceding stabilizer blade and back stabilizer blade all be provided with universal wheel (18), the top of preceding stabilizer blade and back stabilizer blade with base (5) are articulated, base (5) bottom be provided with a plurality of stop gear, the top of preceding stabilizer blade and back stabilizer blade be provided with limit structure, it is a plurality of before stop gear cooperates the rotation of restriction preceding stabilizer blade and back stabilizer blade with limit structure respectively.
4. A bellows helium leak detection test device as claimed in claim 1, wherein: the inflation inlet and relief valve and manometer and concentration meter are 180 relative distributions on the sealed cowling circumference.
5. A bellows helium leak detection test device according to claim 3, characterized in that: the structure of the front supporting leg is the same as that of the rear supporting leg, the front supporting leg comprises two supporting legs (6) and a cross rod (21), the middle parts of the two supporting legs (6) are connected through the cross rod (21), a universal wheel (18) is arranged at the bottom of each supporting leg (6), a limiting structure is arranged at the top of each supporting leg (6), a first reset mechanism and a second reset mechanism are arranged at the bottom of the base (5), each first reset mechanism comprises a first pull rod (12), a first push rod (13), a sleeve ring (14) and a first reset spring (15), one end of the first pull rod (12) is hinged to the cross rod (21) of the front supporting leg, the other end of the first pull rod is hinged to the first push rod (13), the two sleeve rings (14) are arranged at the bottom of the base (5), the first push rod (13) is connected with the sleeve rings (14) in a sliding mode, the first reset spring (15) is sleeved on the first push rod (13) between the two sleeve rings (14), the first push rod (13) is provided with a pressing block (16), and one end of the two pressing blocks (16) are abutted against each pressing block (15); the second reset mechanism comprises a second pull rod (7), a second push rod (8), a sliding ring (10) and a second reset spring (9), one end of the second pull rod (7) is hinged to a cross rod (21) of the rear supporting leg, the other end of the second pull rod (7) is hinged to one end of the second push rod (8), the two sliding rings (10) are coaxially arranged at the bottom of the base (5), the second push rod (8) is connected with the two sliding rings (10) in a sliding mode, the second reset spring (9) is sleeved on the second push rod (8) between the two sliding rings (10), a push block (11) is arranged on the second push rod (8), the push block (11) is located between the two sliding rings (10), and one end of the second reset spring (9) abuts against the push block (11).
6. A bellows helium leak detection test device according to claim 5, characterized in that: the limiting mechanism comprises a rotating shaft (19), a stop lever (17), a rotating wheel (20), a pull wire (39), a pressure spring (37), pistons (35) and a cylinder barrel (34), the rotating shaft (19) is rotatably arranged at the bottom of a base (5), the rotating shaft (19) is provided with two rotating wheels (20), the base (5) corresponding to each supporting leg (6) is provided with the cylinder barrel (34), the pistons (35) are slidably arranged in the cylinder barrel (34), the limiting structure is limiting holes (36) formed in the supporting legs (6), one end of each piston (35) extends out of the cylinder barrel (34) and is matched with the limiting holes (36), limiting plates (38) are arranged in the corresponding cylinder barrel (34), the pressure spring (37) is arranged between the corresponding piston (35) and the limiting plate (38), the sleeve (39) is sleeved with the corresponding sleeve (22), two ends of the sleeve (22) are provided with fixing parts, the base (5) is arranged on one side of the corresponding to the rotating wheel (20) and the corresponding to the corresponding mounting plate (34), one side of the corresponding mounting plate (39), the mounting plate (39) is respectively connected with the two mounting plates (20) of the pull wire (22), the cylinder barrel (34) is provided with a pull hole, and the other end of the pull wire (39) penetrates through the pull hole to be connected with the piston (35).
7. The bellows helium leak detection test device of claim 2, wherein: slider (23) one end be provided with V-arrangement guide block (24), the one end that V-arrangement guide block (24) closed up and the spout intercommunication of slider (23), V-arrangement guide block (24) inner wall seted up the mounting groove, the mounting groove internal rotation be provided with a plurality of leading wheels, the one end that the slider is located V-arrangement guide block (24) is the arc.
8. A bellows helium leak detection test device as claimed in claim 2, wherein: bellows fixed frock include many screw rods (26), clamp plate (25) and actuating mechanism, clamp plate (25) be provided with two, be provided with a plurality of slide openings on clamp plate (25), the one end of screw rod (26) is provided with spacing platform, the one end of screw rod (26) corresponds a slide opening threaded connection nut that passes a clamp plate (25) with screw rod (26) and clamp plate (25) fixed connection, the screw rod (26) other end pass another the slide opening of clamp plate (25) is connected with actuating mechanism, drives screw rod (26) through actuating mechanism and removes, two along the slide opening one side that clamp plate (25) is relative all is provided with seal structure.
9. A bellows helium leak detection test device according to claim 8, wherein: actuating mechanism include drive gear (31) and driven gear (30), screw rod (26) threaded connection have screw-nut (29), driven gear (30) cover is established the outside of screw-nut (29), drive gear (31) coaxial be provided with the drive shaft, it is a plurality of driven gear (30) with drive gear (31) meshing, clamp plate (25) on be provided with casing (32), driven gear (30) and drive gear (31) spacing in casing (32), casing (32) on be provided with drive arrangement (33), the output and the drive shaft of drive arrangement (33) are connected.
10. A bellows helium leak detection test device according to claim 8, wherein: the sealing structure comprises a sealing block (28) and a sealing ring (40), the sealing block (28) is fixed on the pressing plate (25), the sealing block (28) is of a cone frustum structure, an annular sealing groove is formed in the outer wall of the sealing block (28), the sealing ring (40) is sleeved in the sealing groove, the sealing ring (40) is of a hollow structure, an air passage (46) is formed in the sealing block (28), one end of the air passage (46) is communicated with the sealing ring (40) through a joint, the other end of the air passage (46) is provided with an air inlet structure, the air inlet structure comprises an air inlet valve (41), a connecting block (42) and a sealing head (44), one end of the air passage (46) is a stepped hole, a compression spring (43) is arranged in the stepped hole, the compression spring (43) is sleeved on the air inlet valve (41), the air inlet valve (41) is provided with a ring stand, one end of the compression spring (43) is abutted on the stepped ring stand, the other end of the stepped hole is abutted to the step of the stepped hole, an internal thread is arranged at one end of the connecting block (42), an external thread of the connecting block (42) is connected with a limiting through hole (41), and the air inlet valve (41) is arranged in the limiting through hole, through-hole and admission valve (41) between and be provided with sealed rubber ring between connecting block (42) and the shoulder hole, connecting block (42) one end threaded connection seal head (44), it will to set up sealed pad (45) in seal head (44) the through-hole is sealed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211236748.2A CN115307835A (en) | 2022-10-10 | 2022-10-10 | Corrugated pipe helium leakage detection test device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211236748.2A CN115307835A (en) | 2022-10-10 | 2022-10-10 | Corrugated pipe helium leakage detection test device |
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| CN115307835A true CN115307835A (en) | 2022-11-08 |
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| CN202211236748.2A Pending CN115307835A (en) | 2022-10-10 | 2022-10-10 | Corrugated pipe helium leakage detection test device |
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Cited By (1)
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| CN116978592A (en) * | 2023-09-21 | 2023-10-31 | 江苏新恒基特种装备股份有限公司 | Bellows leakage detection device |
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Application publication date: 20221108 |