CN110307334B - Hydrogen atom frequency scale storage bubble opening vacuum sealing device and vacuum sealing method - Google Patents
Hydrogen atom frequency scale storage bubble opening vacuum sealing device and vacuum sealing method Download PDFInfo
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- CN110307334B CN110307334B CN201910588352.6A CN201910588352A CN110307334B CN 110307334 B CN110307334 B CN 110307334B CN 201910588352 A CN201910588352 A CN 201910588352A CN 110307334 B CN110307334 B CN 110307334B
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- 238000007789 sealing Methods 0.000 title claims abstract description 97
- 238000003860 storage Methods 0.000 title claims abstract description 93
- 125000004435 hydrogen atom Chemical group [H]* 0.000 title claims abstract description 55
- 238000000034 method Methods 0.000 title claims abstract description 31
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical group [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims abstract description 73
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 51
- 229910052802 copper Inorganic materials 0.000 claims abstract description 51
- 239000010949 copper Substances 0.000 claims abstract description 51
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical group [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 claims abstract description 41
- 239000010936 titanium Substances 0.000 claims abstract description 35
- 229910052719 titanium Inorganic materials 0.000 claims abstract description 35
- -1 polytetrafluoroethylene ring Polymers 0.000 claims abstract description 34
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims abstract description 17
- 239000004810 polytetrafluoroethylene Substances 0.000 claims abstract description 17
- 230000008569 process Effects 0.000 claims abstract description 11
- 239000012790 adhesive layer Substances 0.000 claims abstract description 8
- 230000008878 coupling Effects 0.000 claims description 24
- 238000010168 coupling process Methods 0.000 claims description 24
- 238000005859 coupling reaction Methods 0.000 claims description 24
- 238000001514 detection method Methods 0.000 claims description 21
- 239000003292 glue Substances 0.000 claims description 13
- 239000010410 layer Substances 0.000 claims description 8
- 238000007664 blowing Methods 0.000 claims description 6
- 238000013461 design Methods 0.000 claims description 6
- 239000001307 helium Substances 0.000 claims description 6
- 229910052734 helium Inorganic materials 0.000 claims description 6
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 claims description 6
- 229910052751 metal Inorganic materials 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 5
- 229910052738 indium Inorganic materials 0.000 claims description 5
- 239000011247 coating layer Substances 0.000 claims description 3
- 238000004891 communication Methods 0.000 claims 1
- 239000007789 gas Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 238000001125 extrusion Methods 0.000 description 3
- 238000011049 filling Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229910052755 nonmetal Inorganic materials 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000012790 confirmation Methods 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/02—Sealings between relatively-stationary surfaces
- F16J15/06—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K37/00—Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The application discloses a vacuum sealing device and a vacuum sealing method for a hydrogen atom frequency standard storage bubble mouth, wherein the vacuum sealing device for the hydrogen atom frequency standard storage bubble mouth comprises a copper nut sleeved outside the upper part of a longitudinal tubular storage bubble mouth, a longitudinal tubular adhesive layer is arranged between the storage bubble mouth and the copper nut, an annular waveform elastic pad, a first titanium ring, a polytetrafluoroethylene ring, a second titanium ring and an indium wire ring sleeved outside the storage bubble mouth are sequentially arranged below the copper nut, an annular polytetrafluoroethylene cap is arranged at the lower end of the storage bubble mouth, and longitudinal tubular titanium connecting pieces are sleeved outside the lower part of the copper nut and outside the waveform elastic pad, the first titanium ring, the polytetrafluoroethylene ring, the second titanium ring, the indium wire ring and the polytetrafluoroethylene cap; the device can prevent the hydrogen atom frequency scale from micro leakage at the vacuum sealing position of the bubble port in the assembly debugging and even later use process, and improve the sealing reliability so as to ensure that the hydrogen atom frequency scale can reliably operate for a long time.
Description
Technical Field
The application relates to the technical field of building decoration, in particular to a vacuum sealing device and a vacuum sealing method for a hydrogen atom frequency standard storage bubble opening.
Background
At present, the method for vacuum sealing the bubble mouth of the hydrogen atom frequency standard storage bubble is as follows: the method comprises the steps that an indium wire ring with specific specification is placed at a gap between a storage bubble opening and a bubble connecting piece, a titanium ring and a copper nut are sequentially placed at the upper part of the indium wire ring, the titanium ring is stressed and deformed by screwing the copper nut, gap spaces between the storage bubble and the bubble connecting piece are filled, spot gluing is carried out in the gap between the copper nut and the bubble opening wall after leak detection confirmation, after vacuum is prepared in the storage bubble, external atmosphere cannot enter the storage bubble through an original gap at the storage bubble opening, and therefore vacuum sealing of the storage bubble opening is achieved, but the sealing method has the following defects: (1) In the extrusion process of the indium wire ring, part of indium wires overflow from the titanium ring and the bubble mouth in the extrusion process because of no space limitation; (2) The storage bubble is subjected to micro deformation by transverse and longitudinal forces at the sealing opening of the storage bubble in the process of debugging and assembling in the microwave cavity and external vacuum inflation and deflation, and the vacuum micro leakage is caused by the fact that the sealing opening is provided with pores due to the fact that the indium wire cannot rebound; (3) The sealing part of the storage bubble opening is wound with a heating wire, and the heating wire is subjected to thermal shock for many times, so that micro leakage occurs after the indium wire ring is extended. Therefore, a vacuum sealing device and a vacuum sealing method for a hydrogen atom frequency scale storage bubble mouth are needed, and the problem that in the prior art, micro leakage occurs at a vacuum sealing position in the process of assembly debugging and even later use of the hydrogen atom frequency scale, so that the whole equipment is scrapped is solved. The Chinese patent publication No. CN104062081A discloses a remote control wide-range gas leakage rate detection device, which consists of a camera device, a data processor, a unit console, a measurement and control cable, a gas collecting tube, a flowmeter, a bubble leak detector, an electromagnetic valve and a metal tube. The data processor and the unit console are respectively a remote data acquisition device and a unit control device, so that remote monitoring and control functions are realized; the camera equipment mainly monitors the bubble leak detector; the leakage rate detection device is composed of a gas collecting tube, a flowmeter, a bubble leak detector, an electromagnetic valve and a metal tube, wherein the gas collecting tube is provided with an inlet electromagnetic valve, an outlet electromagnetic valve and N outlets, and the N electromagnetic valves and the flowmeter and the electromagnetic valve and the bubble leak detector are connected in parallel and are respectively connected with the N outlets of the gas collecting tube. The Chinese patent publication No. CN104505132A discloses a leak detection box of a fuel rod vacuum bubble method after irradiation, which comprises a leak detection box body with an opening at the upper end, wherein a groove is arranged on the end face of the opening at the upper end of the leak detection box body, a sealing rubber strip is arranged in the groove, a cover plate is also arranged above the leak detection box body, a protruding block is arranged facing the leak detection box body, and the protruding block is inserted into the groove to seal the opening at the upper end of the leak detection box body. Although it can achieve the effect of detecting leakage, the above-mentioned problems are also present.
Disclosure of Invention
The application provides a vacuum sealing device and a vacuum sealing method for a hydrogen atom frequency scale storage bubble mouth, and aims to solve the problem that in the prior art, a hydrogen atom frequency scale is slightly leaked at a vacuum sealing part in the process of assembly debugging and even later use, so that the whole equipment is scrapped.
The application provides a vacuum sealing device for a hydrogen atom frequency standard storage bubble mouth, which comprises a copper nut sleeved outside the upper part of a longitudinal tubular storage bubble mouth, a longitudinal tubular adhesive layer is arranged between the storage bubble mouth and the copper nut, an annular waveform elastic pad, a first titanium ring, a polytetrafluoroethylene ring, a second titanium ring and an indium wire ring sleeved outside the storage bubble mouth are sequentially arranged below the copper nut, an annular polytetrafluoroethylene cap is arranged at the lower end of the storage bubble mouth, and longitudinal tubular titanium connectors are sleeved outside the lower part of the copper nut, the waveform elastic pad, the first titanium ring, the polytetrafluoroethylene ring, the second titanium ring, the indium wire ring and the polytetrafluoroethylene cap.
The application relates to a hydrogen atom frequency scale storage bubble vacuum sealing device, which is generally made of quartz glass, so that the hydrogen atom frequency scale storage bubble vacuum sealing device belongs to a copper nut and a storage bubble, namely non-magnetic metal and non-metal vacuum sealing; during sealing, the gap between two material components is filled by extruding the indium wire ring to realize vacuum sealing, the characteristics of ductility, non-contractibility and the like of the indium wire ring are emphasized, measures of preventing the indium wire ring from overflowing from the gap, applying pressure to the indium wire ring for a long time through the waveform elastic pad and the like are pertinently added, and the long-term reliable filling of the indium wire ring in the gap at a sealing opening is ensured, so that leakage holes cannot occur in later use; then detecting the leakage rate of the sealing port through leakage detection equipment to confirm the sealing effect; and finally, dispensing and solidifying to finish the whole operation content of vacuum sealing of the storage bubble opening.
Another aspect of the present invention provides a vacuum sealing method of a vacuum sealing device for a hydrogen atom frequency standard storage bubble port, comprising the following steps:
Fitting a titanium coupling member to a hydrogen atom frequency scale at a corresponding position;
Taking a storage bubble to be sealed, and sequentially placing a copper nut, a waveform spring pad, a first titanium ring, a polytetrafluoroethylene ring, a second titanium ring, an indium wire ring and a polytetrafluoroethylene cap at a storage bubble opening of the storage bubble to be sealed;
Placing the storage bubble port into the titanium coupling and confirming that the storage bubble port is pressed to the bottommost end of the titanium coupling;
tightening the copper nut;
the hydrogen atom frequency standard is connected with a leak detector through a valve to detect leak;
When the leak rate is superior to the leak rate set value, bagging and blowing helium at the sealing position, if the leak rate is not increased within the set time, the sealing meets the design requirement, and closing the valve for standing;
repeating the tightening operation process of the copper nut after setting the repetition time, and performing leak detection operation again;
And when the leak rate is superior to the leak rate set value, bagging the sealing part again and blowing helium, if the leak rate is not increased within the leak rate detection set time, indicating that the sealing meets the design requirement, closing the valve, standing, dispensing a glue coating layer on the copper nut, and standing for setting the curing time to cure the glue layer.
The vacuum sealing method of the hydrogen atom frequency scale storage bubble mouth vacuum sealing device of the application uses the vacuum pump to pump the storage bubble to high vacuum, and the sealing of the joint is completed without leakage points, so the high vacuum can be maintained for a long time.
The hydrogen atom frequency scale storage bubble opening vacuum sealing device and the vacuum sealing method can achieve the following beneficial effects:
The vacuum sealing device and the vacuum sealing method for the hydrogen atom frequency scale storage bubble mouth can solve the problem that in the prior art, the hydrogen atom frequency scale is slightly leaked at the vacuum sealing part in the process of assembly debugging and even later use, so that the whole equipment is scrapped; the micro-leakage of the hydrogen atom frequency scale at the vacuum sealing position of the bubble port in the assembly debugging and even later use process can be effectively avoided, the sealing reliability is improved, and the long-term reliable operation of the hydrogen atom frequency scale is ensured.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute a limitation on the application. In the drawings:
FIG. 1 is a schematic diagram of a hydrogen atom frequency standard storage bubble port vacuum sealing device according to the present application.
In the figure, 1 is a storage bubble port, 2 is an adhesive layer, 3 is a copper nut, 4 is a waveform elastic pad, 5 is a first titanium ring, 6 is a polytetrafluoroethylene ring, 7 is a second titanium ring, 8 is an indium wire ring, 9 is a polytetrafluoroethylene cap, and 10 is a titanium connecting piece.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be clearly and completely described below with reference to specific embodiments of the present application and corresponding drawings. It will be apparent that the described embodiments are only some, but not all, embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
The following describes in detail the technical solutions provided by the embodiments of the present application with reference to the accompanying drawings.
Example 1
Referring to fig. 1, the hydrogen atom frequency standard storage bubble vacuum sealing device comprises a copper nut 3 sleeved outside the upper portion of a longitudinal tubular storage bubble 1, a longitudinal tubular adhesive layer 2 is arranged between the storage bubble 1 and the copper nut 3, an annular waveform elastic pad 4 sleeved outside the storage bubble 1, a first titanium ring 5, a polytetrafluoroethylene ring 6, a second titanium ring 7 and an indium wire ring 8 are sequentially arranged below the copper nut 3, an annular polytetrafluoroethylene cap 9 is arranged at the lower end of the storage bubble 1, and a longitudinal tubular titanium connecting piece 10 is sleeved outside the lower portion of the copper nut 3, the waveform elastic pad 4, the first titanium ring 5, the polytetrafluoroethylene ring 6, the second titanium ring 7, the indium wire ring 8 and the polytetrafluoroethylene cap 9.
The hydrogen atom frequency scale storage bubble vacuum sealing device of the embodiment is characterized in that the storage bubble port 1 is generally made of quartz glass, so the hydrogen atom frequency scale storage bubble port vacuum sealing device of the application belongs to a copper nut 3 and the storage bubble port 1, namely non-magnetic metal and non-metal vacuum sealing; during sealing, the gap between two material components is filled by extruding the indium wire ring 8 to realize vacuum sealing, the characteristics of ductility, non-contractibility and the like of the indium wire ring 8 are emphasized, measures such as preventing the indium wire ring 8 from overflowing from the gap, and permanently applying pressure to the indium wire ring 8 through the waveform elastic pad 4 are purposefully increased, and the fact that the indium wire ring 8 at a sealing opening is reliably filled in the gap for a long time is ensured, so that leakage holes cannot occur in later use; then detecting the leakage rate of the sealing port through leakage detection equipment to confirm the sealing effect; and finally, dispensing and solidifying to finish the whole operation content of vacuum sealing of the storage bubble opening.
In this embodiment, the adhesive layer 2 is a DG-4 adhesive layer.
The present embodiment may further include a quartz glass tube structure as the storage bubble port 1.
In this embodiment, the inner wall of the titanium coupling member 10 is provided with a coupling internal thread, the outer wall of the copper nut 3 is provided with a nut external thread, and the titanium coupling member 10 and the copper nut 3 are connected with the nut external thread in a matching manner through the coupling internal thread.
In this embodiment, the outer wall of the titanium coupling member 10 may further be provided with a coupling external thread, the inner wall of the hydrogen atom frequency specimen structural member is provided with a structural internal thread, the titanium coupling member 10 and the hydrogen atom frequency specimen structural member are connected in a matching manner by the coupling external thread and the structural internal thread, and a metal sealing structure is provided between the titanium coupling member 10 and the hydrogen atom frequency specimen structural member.
In this embodiment, a boss structure for limiting the waveform spring pad 4 may be further disposed at the inner edge of the first titanium ring 5.
In the vacuum sealing device for the hydrogen atom frequency scale storage bubble port of the embodiment, the storage bubble port 1 can be formed by processing a quartz glass tube, the inner diameter of the tube can be 4-6 mm, the outer diameter of the tube can be 8-10 mm, the thickness of the tube wall can be 2-3 mm, and the tube preferably has mechanical strength so as to bear external extrusion force. The titanium coupling 10 may be machined from TC4 titanium. After vacuum sealing is carried out between the storage bubble port 1 and the titanium connector 10, the vacuum preparation and the maintenance of the hydrogen atom frequency scale storage bubble can be realized. Among the various components between the storage blister 1 and the titanium coupling 10: the polytetrafluoroethylene cap 9 is tightly buckled on the storage bubble 1 and is tightly matched with the titanium connector 10 so as to prevent the indium wire coil 8 from overflowing from the storage bubble 1 when being extruded; the indium wire ring 8 is made of indium wires with the diameter of 1-2 mm, and a plurality of indium wire rings 8 are generally used in a superposition manner when the requirement of filling space is considered to be met; the second titanium ring 7 is a ring sheet with thickness and is used for extruding the indium wire ring 8, and the indium wire ring 8 is extruded and filled in the gap; the shape of the polytetrafluoroethylene ring 6 is the same as that of the second titanium ring 7, but the inner diameter of the polytetrafluoroethylene ring 6 is tightly matched with the outer diameter of the storage bubble mouth 1, and the outer diameter of the polytetrafluoroethylene ring 6 is tightly matched with the inner diameter of the titanium coupling piece 10 so as to prevent the indium wire ring 8 from overflowing from the copper nut 3 when being extruded; the first titanium ring 5 is used for limiting and transmitting the elasticity of the waveform elastic pad 4; the waveform elastic pad 4 is used for generating lasting elastic force to compensate the rebound force required by the deformation of the indium wire coil 8; the copper nut 3 is used for storing the deformation of the indium wire ring 8 when the bubble opening 1 is sealed so as to fill the gap at the sealing opening; the glue layer 2 is used for filling gaps among the copper nut 3, the indium wire ring 8 and the titanium coupling piece 10, and preventing the copper nut 3 and the storage bubble from loosening during vibration.
The hydrogen atom frequency scale storage bubble port vacuum sealing device of the embodiment specifically may be, for example, a pipe inner diameter of the storage bubble port 1 is 4mm, a pipe outer diameter is 10mm, and a pipe wall thickness is 3mm; the diameter of the indium wires used for the indium wire ring 8 is 2mm; the inner diameter of the copper nut 3 is 12mm, the outer diameter of the outer thread is 18mm, the thread pitch is 1mm, and the top end outer hexagon is matched with a spanner with the inner diameter of 22 mm; the inner diameter of the waveform elastic pad 4 is 13mm and the thickness is 0.5mm; the inner diameter of the first titanium ring 5 is 12mm, the outer diameter is 17mm, the thickness is 1mm, and the height and the width of the boss structure are both 0.5mm; the inner and outer diameter and thickness dimensions of the second titan ring 7 may be the same as the first titan ring 5, but the second titan ring 7 has no said boss structure. The inner diameter of the polytetrafluoroethylene ring 6 is 10mm, the outer diameter is 18mm, and the thickness is 1mm; the polytetrafluoroethylene cap 9 is 3mm in height and 0.5mm in thickness, the polytetrafluoroethylene cap is tightly fastened with the storage bubble opening 1, and the periphery of the polytetrafluoroethylene cap 9 is tightly matched with the titanium connecting piece 10; the titanium coupling 10 has a height of 30mm, a connecting internal thread may be provided at a position of 10mm at an upper end thereof, an outer diameter of the connecting internal thread may be 18mm, an inner diameter of a position of 10mm in the middle thereof may be 18mm, an inner diameter of a position of 10mm at a lower end thereof may be 11mm, a bottom end face thereof may be provided with an opening, a bore diameter of the opening may be 6mm, and a thickness of an end face thereof may be 1mm.
Example 2
A vacuum sealing method of a hydrogen atom frequency standard storage bubble vacuum sealing apparatus as described in example 1, comprising the steps of,
Fitting the titanium coupling 10 to the hydrogen atom frequency scale at the corresponding position;
Taking a storage bubble to be sealed, and sequentially placing a copper nut 3, a waveform spring pad 4, a first titanium ring 5, a polytetrafluoroethylene ring 6, a second titanium ring 7, an indium wire ring 8 and a polytetrafluoroethylene cap 9 at a storage bubble opening 1 of the storage bubble to be sealed;
Placing the storage blister 1 into the titanium coupling 10 and confirming that the storage blister 1 is pressed to the bottommost end of the titanium coupling 10;
Tightening the copper nut 3;
the hydrogen atom frequency standard is connected with a leak detector through a valve to detect leak;
When the leak rate is superior to the leak rate set value, bagging and blowing helium at the sealing position, if the leak rate is not increased within the leak rate detection set time, the sealing meets the design requirement, and closing the valve for standing;
repeating the tightening operation process of the copper nut 3 after setting the repetition time, and performing the leak detection operation again;
And when the leak rate is superior to the leak rate set value, bagging the sealing part again, blowing helium, if the leak rate is not increased within the set time, indicating that the sealing meets the design requirement, closing the valve, standing, dispensing a glue layer at the copper nut 3, and standing for setting the curing time to cure the glue layer.
The vacuum sealing method of the hydrogen atom frequency scale storage bubble mouth vacuum sealing device of the embodiment is to pump the storage bubble to high vacuum by a vacuum pump, and the sealing of the joint is completed without leakage points, so that the high vacuum can be maintained for a long time.
The embodiment can further operate by a torque wrench when the copper nut 3 is screwed; and when the torque set value is reached, the screwing operation of the copper nut 3 is stopped.
In this embodiment, a glue layer is further applied to the copper nut 3, and after the glue layer is cured by standing for a predetermined time, the storage bubble is pumped to vacuum by a vacuum pump.
In this embodiment, the torque set value may be 20n·m; the leakage rate set value is 3E-11 Pa.m3/s; the leak rate detection setting time is 10min; the set repetition time is 24 hours; the set curing time is 24 hours.
In addition, all the components can be dried for later use after ultrasonic purification by adopting alcohol before sealing is started. Then the titanium connector 10 is assembled at the corresponding position of the hydrogen atomic frequency standard, the storage bubble to be sealed is taken, a copper nut 3, two waveform spring pads 4, a first titanium ring 5, a polytetrafluoroethylene ring 6, a second titanium ring 7, two indium wire rings 8 and a polytetrafluoroethylene cap 9 are sequentially placed at the storage bubble opening 1, then the storage bubble opening 1 is placed in the titanium connector 10 and is confirmed to be pressed to the bottommost end, and finally the copper nut 3 is started to be screwed by a torque wrench, leakage detection, standing, screwing again, leakage detection again and glue dispensing solidification are carried out until vacuum sealing is completed.
The foregoing is merely exemplary of the present application and is not intended to limit the present application. Various modifications and variations of the present application will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the application are to be included in the scope of the claims of the present application.
Claims (10)
1. Bubble mouth vacuum sealing device is stored to hydrogen atom frequency scale, bubble mouth vacuum sealing device is stored to hydrogen atom frequency scale includes that the cover is established outside vertical tubular bubble mouth (1) upper portion of storing copper nut (3), a serial communication port, be provided with vertical tubular glue film (2) between bubble mouth (1) and the copper nut (3) of storing, set gradually below copper nut (3) and establish annular wave form bullet pad (4) outside bubble mouth (1) of storing, first titanium ring (5), polytetrafluoroethylene ring (6), second titanium ring (7) and indium silk circle (8), the lower extreme of bubble mouth (1) of storing is provided with annular polytetrafluoroethylene cap (9), outside copper nut (3) lower part, and wave form bullet pad (4), first titanium ring (5), polytetrafluoroethylene ring (6), second titanium ring (7), indium silk circle (8) and polytetrafluoroethylene cap (9) all overlap and are equipped with vertical tubular titanium coupling piece (10).
2. The hydrogen atom frequency scale storage bubble vacuum sealing device according to claim 1, wherein the adhesive layer (2) is a DG-4 adhesive layer.
3. The hydrogen atom frequency scale storage bubble port vacuum sealing apparatus as claimed in claim 1, wherein the storage bubble port (1) is a quartz glass tube structure.
4. The vacuum sealing device for the hydrogen atom frequency scale storage bubble port according to claim 1, wherein a connecting internal thread is arranged on the inner wall of the titanium connecting piece (10), a nut external thread is arranged on the outer wall of the copper nut (3), and the titanium connecting piece (10) and the copper nut (3) are connected with the nut external thread in a matching way through the connecting internal thread.
5. The vacuum sealing device for the hydrogen atom frequency scale storage bubble mouth according to claim 4, wherein a connecting external thread is arranged on the outer wall of the titanium connecting piece (10), a structural internal thread is arranged on the inner wall of the hydrogen atom frequency sample body structural member, the titanium connecting piece (10) and the hydrogen atom frequency sample body structural member are connected in a matched mode through the connecting external thread and the structural internal thread, and a metal sealing structure is arranged between the titanium connecting piece (10) and the hydrogen atom frequency sample body structural member.
6. The hydrogen atom frequency standard storage bubble mouth vacuum sealing device according to claim 1, wherein a boss structure for limiting the waveform elastic pad (4) is arranged at the inner edge of the first titanium ring (5).
7. A vacuum sealing method of a hydrogen atom frequency standard storage bubble port vacuum sealing apparatus as defined in any one of claims 1 to 6, comprising the steps of,
Fitting a titanium coupling (10) to the hydrogen atom frequency scale at a corresponding position;
Taking a storage bubble to be sealed, and sequentially placing a copper nut (3), a waveform spring pad (4), a first titanium ring (5), a polytetrafluoroethylene ring (6), a second titanium ring (7), an indium wire ring (8) and a polytetrafluoroethylene cap (9) at a storage bubble opening (1) of the storage bubble to be sealed;
Placing the storage blister (1) into the titanium coupling (10) and confirming that the storage blister (1) is pressed to the bottommost end of the titanium coupling (10);
Tightening the copper nut (3);
the hydrogen atom frequency standard is connected with a leak detector through a valve to detect leak;
When the leak rate is superior to the leak rate set value, bagging and blowing helium at the sealing position, if the leak rate is not increased within the leak rate detection set time, the sealing meets the design requirement, and closing the valve for standing;
Repeating the screwing operation process of the copper nut (3) after setting the repetition time, and performing the leakage detection operation again;
and when the leak rate is superior to the leak rate set value, bagging the sealing part again, and blowing helium, if the leak rate is not increased within the set time, indicating that the sealing meets the design requirement, closing the valve, standing, and dispensing a glue coating layer at the copper nut (3), and standing for setting the curing time to cure the glue layer.
8. The vacuum sealing method of the hydrogen atom frequency scale storage bubble vacuum sealing device according to claim 7, wherein the copper nut (3) is operated by a torque wrench when being screwed; and stopping the screwing operation of the copper nut (3) after the moment set value is reached.
9. The vacuum sealing method of the hydrogen atom frequency scale storage bubble vacuum sealing device according to claim 8, wherein the glue coating layer is dotted at the copper nut (3), and after standing for a set time to cure the glue layer, the storage bubble is pumped to vacuum by a vacuum pump.
10. The vacuum sealing method of the hydrogen atom frequency scale storage bubble vacuum sealing apparatus according to claim 9, wherein the moment set value is 20 n.m; the leakage rate set value is 3E-11 Pa.m3/s; the leak rate detection setting time is 10min; the set repetition time is 24 hours; the set curing time is 24 hours.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910588352.6A CN110307334B (en) | 2019-07-02 | 2019-07-02 | Hydrogen atom frequency scale storage bubble opening vacuum sealing device and vacuum sealing method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910588352.6A CN110307334B (en) | 2019-07-02 | 2019-07-02 | Hydrogen atom frequency scale storage bubble opening vacuum sealing device and vacuum sealing method |
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| CN110307334A CN110307334A (en) | 2019-10-08 |
| CN110307334B true CN110307334B (en) | 2024-04-30 |
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| CN102624386A (en) * | 2012-02-29 | 2012-08-01 | 北京无线电计量测试研究所 | High-efficiency beam optical system for hydrogen frequency scale |
| CN103429062A (en) * | 2012-05-17 | 2013-12-04 | 中国科学院上海天文台 | Magnetic shielding system and method for improving atomic frequency standard magnetic shielding performance |
| CN103604569A (en) * | 2013-11-04 | 2014-02-26 | 北京卫星环境工程研究所 | Rapid connection device of straight pipe helium mass spectrometer leak detection |
| CN210318482U (en) * | 2019-07-02 | 2020-04-14 | 北京无线电计量测试研究所 | Vacuum sealing device for bubble mouth for storing hydrogen atom frequency standard |
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| US20150048542A1 (en) * | 2011-08-29 | 2015-02-19 | Dsm Ip Assets B.V. | Device and process for calibrating tubular extrudates |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102624386A (en) * | 2012-02-29 | 2012-08-01 | 北京无线电计量测试研究所 | High-efficiency beam optical system for hydrogen frequency scale |
| CN103429062A (en) * | 2012-05-17 | 2013-12-04 | 中国科学院上海天文台 | Magnetic shielding system and method for improving atomic frequency standard magnetic shielding performance |
| CN103604569A (en) * | 2013-11-04 | 2014-02-26 | 北京卫星环境工程研究所 | Rapid connection device of straight pipe helium mass spectrometer leak detection |
| CN210318482U (en) * | 2019-07-02 | 2020-04-14 | 北京无线电计量测试研究所 | Vacuum sealing device for bubble mouth for storing hydrogen atom frequency standard |
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