CN108194727B - Chain clamp for vacuum flange butt joint, mounting tool and mounting method thereof - Google Patents
Chain clamp for vacuum flange butt joint, mounting tool and mounting method thereof Download PDFInfo
- Publication number
- CN108194727B CN108194727B CN201810108090.4A CN201810108090A CN108194727B CN 108194727 B CN108194727 B CN 108194727B CN 201810108090 A CN201810108090 A CN 201810108090A CN 108194727 B CN108194727 B CN 108194727B
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- China
- Prior art keywords
- sealing ring
- fixing
- chain
- clamp
- mounting
- Prior art date
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- 210000001503 joint Anatomy 0.000 title claims abstract description 28
- 238000000034 method Methods 0.000 title claims abstract description 18
- 238000007789 sealing Methods 0.000 claims abstract description 70
- 238000009434 installation Methods 0.000 claims abstract description 27
- 229910052751 metal Inorganic materials 0.000 claims abstract description 9
- 239000002184 metal Substances 0.000 claims abstract description 9
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- CWQXQMHSOZUFJS-UHFFFAOYSA-N molybdenum disulfide Chemical compound S=[Mo]=S CWQXQMHSOZUFJS-UHFFFAOYSA-N 0.000 description 1
- 229910052982 molybdenum disulfide Inorganic materials 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- 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
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L21/00—Joints with sleeve or socket
- F16L21/06—Joints with sleeve or socket with a divided sleeve or ring clamping around the pipe-ends
- F16L21/065—Joints with sleeve or socket with a divided sleeve or ring clamping around the pipe-ends tightened by tangentially-arranged threaded pins
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
- B25B27/14—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for assembling objects other than by press fit or detaching same
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Clamps And Clips (AREA)
Abstract
The application discloses chain clamp, mounting tool and installation method of vacuum flange butt joint, wherein, chain clamp includes: the chain comprises a plurality of clamping petals which are connected in a hinged mode, fixing parts used for being abutted with an installation tool are arranged on the outer surfaces of the clamping petals, and fastening screw holes used for being abutted are formed in the head end and the tail end of the chain. Firstly, a sealing ring made of metal is inserted between two flange faces to be butted; when in installation, each clamping valve of the chain type clamp is fixed through a fixing rod, so that the preset position is realized; the mounting rod can carry the fixing bolt and screw the fixing bolt at the joint of the clamping petals, and the sealing ring is extruded by the flange, so that the sealing ring is deformed and filled between flange faces to realize sealing, thereby completing non-contact mounting of the chain type clamp, and the mounting rod is simple to operate and convenient to realize rapid loading and unloading under a high-radiation environment.
Description
Technical Field
The application relates to the field of accelerators, in particular to a chain clamp for butt joint of vacuum flanges, an installation tool and an installation method of the chain clamp.
Background
In the field of particle accelerators, vacuum system connections typically employ standard knife edge flange structures, which have good safety and reliability. However, for a high-current proton accelerator such as a Chinese Spallation Neutron Source (CSNS), due to the large radiation dose, replacement and maintenance of damaged parts need to be completed in a short time as much as possible after equipment in a tunnel has a problem, so that a chain type quick-release device is adopted for connection at a pipeline connection position, a pump port position and the like. The particle accelerator is used as a complex large scientific research device and is limited by physical requirements, mechanical requirements and the like, and the installation space of a part of the region is smaller, so that a small-size flange is required to be installed in a high-radiation and narrow space.
The existing clamp for installing a knife edge flange in the accelerator field is inconvenient to install in a narrow space due to the structure of the clamp, long in installation time and extremely inconvenient.
Disclosure of Invention
The application provides a chain clamp, an installation tool and an installation method for vacuum flange butt joint, which aim at solving the problem of high flange butt joint difficulty in a high-radiation environment.
The application discloses a chain clamp for vacuum flange butt joint includes: the chain comprises a plurality of clamping petals hinged to each other, fixing parts used for butt joint of installation tools are arranged on the outer surfaces of the clamping petals, and fastening screw holes used for butt joint are formed in the head end and the tail end of the chain.
The chain type clamp for butt joint of the vacuum flanges is characterized in that the fixing part is a fixing screw hole arranged on the surface of the clamping flap.
The chain type clamp for the butt joint of the vacuum flanges is characterized in that the chains are mutually butt-jointed through fastening bolts matched with the fastening screw holes.
The chain type clamp for the vacuum flange butt joint comprises two chains which can be butt-jointed to form a circular ring shape, and each chain comprises two clamping petals.
A tool for installing a chain clamp, wherein the clamp is the chain clamp described above, the tool comprising a mounting member including a mounting bar, the mounting bar end being provided with a working portion for screwing the fixing bolt.
The tool comprises a tool body, and is characterized by further comprising a fixing piece, wherein the fixing piece comprises a fixing rod, an extension section of the end part of the fixing rod is provided with threads matched with the fixing screw hole.
The tool is characterized in that the tail part of the fixing rod is provided with a handle perpendicular to the axial direction of the fixing rod.
A method of installing a vacuum flange, wherein the method of installing comprises:
the method comprises the steps of presetting, screwing an extension section of a fixing rod into a fixing screw hole of a chain type clamp, and encircling the clamp at a joint of flanges; the chain type clamp is the chain type clamp for the butt joint of the vacuum flanges; the fixing rod is the fixing rod;
the fixing clamp is used for fixing the fastening bolt at the end part of the working part of the mounting rod and screwing the fastening bolt into a fastening screw hole at the butt joint part of the chain clamp; the mounting rod is the mounting rod;
and retracting the mounting tool to retract the fixing rod and the mounting rod, wherein the fixing rod is the fixing rod.
The method for installing the vacuum flange, wherein the pre-positioning step further comprises the following steps:
and installing the sealing ring, and arranging the sealing ring between the flange surfaces.
According to the installation method of the vacuum flange, the sealing ring is a metal sealing ring.
The chain type clamp, the mounting tool and the mounting method for the vacuum flange butt joint are provided, wherein a sealing ring made of metal is inserted between two flange faces to be butt-jointed; each clamping valve of the chain type clamp is fixed by a fixing rod, so that the preset position is realized; the mounting rod can carry the fixing bolt and screw the fixing bolt at the joint of the clamping petals, and the sealing ring is extruded by the flange, so that the sealing ring is deformed and filled between flange faces to realize sealing, and the non-contact mounting of the chain type clamp is completed.
Drawings
FIG. 1 is a schematic view of the overall structure of a clip according to an embodiment of the present application;
FIG. 2 is an exploded view of a clip according to an embodiment of the present application;
FIG. 3 is a schematic view of the structure of an installation tool according to the embodiment of the present application;
FIG. 4 is a schematic view showing an installation state of the clip according to the embodiment of the present application;
FIG. 5 is a schematic structural view of a seal ring according to an embodiment of the present application;
FIG. 6 is a schematic structural view of a seal ring according to another embodiment of the present disclosure;
fig. 7 is a schematic structural diagram of a mounting fixture for a seal ring in an embodiment of the present application.
Detailed Description
The present application is described in further detail below with reference to the accompanying drawings by way of specific embodiments.
In the sealing ring for butt joint of the vacuum flange according to the embodiment, as shown in fig. 1 and fig. 2, the clamp 1 comprises a chain which can be butt-jointed to form a ring shape, the chain comprises a plurality of clamping petals 10 hinged with each other, and a fixing part for butt-jointing an installation tool is arranged on the surface of the clamping petals 10. The clamping hoop 1 can be a single chain, can be connected end to end and locked when in use, can also be a plurality of chains, and can be connected end to end in sequence to form a ring shape when in use, and can lock the joint. In this embodiment, the clip 1 comprises two chains, each comprising two articulated flaps 10. The fixing portion provided on the outer surface of the clip 10 may be a hole or a buckle for abutting, and in this embodiment, the fixing portion is a fixing screw hole 11. The clamping petals 10 at the head end and the tail end of the chain are provided with fastening screw holes 12, and the clamp 1 is locked by screwing fastening bolts 13 matched with the fastening screw holes 12.
The application also discloses a instrument for installing above-mentioned sealing washer, as shown in fig. 3 and 4, including mounting 2 and mounting 3, mounting 2 includes installation pole 20, fixes the handle 21 at the installation pole 20 afterbody, fixes the working portion at the installation pole 20 tip, and this working portion is used for screwing the fastening bolt 13 of chain butt joint department. In this embodiment, the fastening bolt 13 is a socket head cap bolt, the working portion at the end of the mounting rod 20 is a socket head cap wrench 22, and the handle 21 is a hexagonal nut structure suitable for hand-holding screwing, but other structures suitable for hand-holding screwing, such as a straight-line cross bar, or a crank, are also possible. The installation rod 20 is tubular, and the installation rod 20 is screwed to fasten the bolt 13, so that the non-contact remote installation can be realized, a complex tool is not required, and the installation rod is simple in structure and convenient to operate.
The fastening bolt 13 needs the socket head cap wrench 22 to be carried into the fastening screw hole 12 of the clamping flap 10, in order to ensure that the fastening bolt 13 falls off from the mounting rod 20 in the process, a circle of elastic sheets are uniformly distributed at the position close to the end part of the socket head cap wrench 21, and the tail part of the fastening bolt 13 is clamped by tightening the elastic sheets to the center part so as to prevent the fastening bolt from falling off.
The fixing part 3 comprises a fixing rod 30, a handle 31 arranged at the tail part of the fixing rod 30 and an extension section 32 arranged at the end part of the fixing rod 30, wherein threads matched with the fixing screw holes 11 are formed on the surface of the extension section 32. Wherein the handle 31 is a transverse handle perpendicular to the axial direction of the fixing rod 30. When the clamp is used, the extension section 32 is screwed into the fixing screw hole 11, the clamp 10 is fixed at the end part of the fixing rod 30, then the chain is sleeved on the two butt flanges 4 through operating the fixing rod 30, the fastening bolt 13 is screwed into the fastening screw hole 12 through the mounting rod 20 and screwed, then the fixing rod 30 is reversely screwed, and the mounting rod 20 and the fixing rod 30 are pulled back.
As shown in fig. 5, in order to achieve a seal between the flanges 4, a sealing ring 5 is also provided between the two abutting flanges 4. The sealing ring 5 is made of metal, such as aluminum, and has good ageing resistance compared with the traditional rubber sealing ring. The two sides of the sealing ring 5, which are opposite to the end face of the flange 3, are respectively provided with a convex part 51 surrounding the sealing ring 5, the top of the convex part 51 is continuously contracted, so that the axial section of the convex part 51 is trapezoid (the width of the upper base of the trapezoid section is smaller than 0.1 mm), or a blade with a triangular axial section is formed, and in the embodiment, only the convex part 51 is exemplified and disclosed by adopting a blade structure with the triangular section. By adopting the structural design, the contact area between the sealing ring 5 and the end face of the flange 4 is reduced, and only a small clamping force is applied to the flange 4, so that the convex part 51 of the sealing ring 5 is subjected to extremely high pressure, and therefore ductile deformation of metal is generated, and gaps at the butt joint part of the flange 4 are filled to realize sealing. Meanwhile, the deformation amount of the sealing ring 5 is controlled by controlling the clamping force of the flange 4, so that the sealing ring 5 can be repeatedly used for a plurality of times, the deformation amount of the sealing ring 5 is increased on the basis of the previous time when the sealing ring is used each time until the sealing requirement is met, and when the convex part 51 disappears due to the expansion of metal after the plurality of times of use, the sealing ring 5 is scrapped.
As shown in fig. 6, in order to increase the tightness of the sealing ring 5, in other embodiments of the present application, the protrusion 51 may include two circles with different heights and edge angles, which are respectively an outer ring protrusion 511 and an inner ring protrusion 512, the edge height of the outer ring protrusion 511 is greater than that of the inner ring protrusion 512, and the edge angle of the outer ring protrusion 511 is greater than that of the outer ring protrusion 512 (and the edge shape of the inner ring protrusion 512 is more sharp), and by adopting such a structure, when the end surface of the flange 4 is relatively rough, the sealing cannot be realized even if the outer ring protrusion 511 is extruded and deformed greatly, and the clamp 1 is continuously applied with a pretightening force to deform the inner ring protrusion 511, so as to fill the gap between the contact surfaces of the flange 4. Because the angle of the cutting edge of the concave part 511 of the inner ring is smaller, the stress area of the cutting edge is small, and larger deformation can be generated under the action of small external force, therefore, on the basis of the deformation of the convex part 512 of the outer ring, the convex part 511 of the inner ring can be deformed only by adding small pretightening force, and the operation difficulty is reduced.
When the sealing ring 5 is placed between the contact surfaces of the flanges 4, the sealing ring can slide downwards under the influence of dead weight, positioning is influenced, and remote installation is not facilitated. To solve this problem, the circumferential surface of the seal ring 5 in this embodiment is provided with fixing pieces 52, and the fixing pieces 52 extend to both sides along the axial direction of the seal ring 5 to form a circular arc-shaped (along the outer edge of the seal ring) metal sheet, the circular arc length of which is smaller than half the circumference of the seal ring 5. In order to facilitate remote installation, the seal ring 5 is provided with an assembling portion on the circumferential surface of the fixing piece 52 for abutting against the installation jig. The assembly part comprises a notch 531 positioned on the surface of the fixing piece 52 and a cavity 532 communicated with the notch 531, the notch 531 and the cavity 532 are arc-shaped, the radian length of the cavity 532 is greater than that of the notch 531, and the position of the cavity 532 is closer to the center of the sealing ring.
As shown in fig. 7, the mounting fixture comprises an extendable telescopic rod 61, wherein a fixing block 62 is arranged at the end part of the telescopic rod 61, concave clamping grooves 63 are respectively arranged at the middle parts of two side surfaces of the fixing block 62, one end of each clamping groove 63 is opened along the length direction, the other end of each clamping groove 63 is closed, and one side end surface of the fixing block 62 (perpendicular to the direction of each clamping groove 63) is in an I shape, and the other side is rectangular. Between the two clamping grooves 63 are spacing parts 64 for connecting the top surface 621 and the bottom surface 622 of the fixing block 62. Wherein the spacer 64 is engaged with the notch 531, and the bottom surface 62 of the fixing block 62 is engaged with the cavity 532.
When the sealing ring 5 is installed, the clamp is firstly abutted with the installation part, one end of the opening of the clamping groove 63 of the fixed block 62 faces the assembly part, the bottom surface 622 of the fixed block 62 is marked into the cavity 532, the spacing part 64 is marked into the notch 531, and meanwhile, the top surface of the fixed block 62 is covered on the surface of the fixing piece 52. Thus, the sealing ring 5 is fixed on the fixed block 62, and the problem that the fixed block 62 slides out from the other side when the sealing ring 5 is in butt joint with the fixed block 62 is prevented because one end of the clamping groove 63 is closed. After the sealing ring 5 is fixed on the fixture, the fixture is operated to insert the sealing ring 5 between the two flanges 4 from top to bottom, then the telescopic rod 61 is moved along the axial direction of the sealing ring 5, the fixing block 62 is withdrawn from the notch 531, and the telescopic rod 61 is retracted. The fixing piece 52 covers the circumferential surface of the flange 4, plays a role of hooking, and positions the sealing ring 5 to prevent the sealing ring from sliding down. In order not to affect the matching relationship between the flange 4 and the inner groove of the clamp 1, the axial dimension of the fixing piece 52 is smaller than the thickness of the two flanges 4 after being butted, i.e. a gap is reserved between two axial boundaries of the fixing piece 52 and the outer edges of the two flanges 4. The sealing ring is made of aluminum or gold or silver with good ductility.
The application also provides a method for installing the clamp by using the installation tool, which comprises the following steps:
s1, installing a sealing ring
The clamp is in butt joint with the mounting part, the sealing ring is fixed on the clamp by the operating clamp, the sealing ring is inserted between the two flanges from top to bottom by the operating clamp, the fixing piece is covered on the circumferential surface of the flange, the hooking effect is achieved, the sealing ring is positioned, and the sealing ring is prevented from sliding downwards.
S2, clamping hoop pre-positioning
The extension section of the fixing rod is screwed into the fixing hole of the sealing ring, and the clamp is surrounded at the joint of the flanges, so that the flange circumference enters the annular groove in the clamp. And a molybdenum disulfide sliding agent can be sprayed on the contact surface of the clamp and the flange in advance, so that the friction coefficient of the contact surface is reduced, and the vacuum sealing pretightening force is reduced.
S3, fixing clamp
Fixing the fixing bolt at the end part of the working part of the mounting rod, screwing the fixing bolt into a fastening screw hole at the butt joint part of the sealing ring, and controlling the screwing degree of the fixing bolt until the sealing ring deforms to fill the gap between the flange surfaces;
s4, withdrawing and installing tool
The fixing rod and the mounting rod are retracted.
According to the sealing ring, the mounting tool and the mounting method for the vacuum flange butt joint, the sealing ring made of metal is inserted between two flange faces to be butt-jointed; each clamping valve of the sealing ring is fixed by the fixing rod, so that the preset position is realized; the mounting rod can carry the fixing bolt and screw the fixing bolt at the joint of the clamping petals, and the sealing ring is extruded by the flange, so that the sealing ring is deformed and filled between flange faces to realize sealing, and thus, the non-contact mounting of the sealing ring is completed, the operation is simple, and the quick assembly and disassembly are convenient.
The foregoing is a further detailed description of the present application in connection with the specific embodiments, and it is not intended that the practice of the present application be limited to such descriptions. It will be apparent to those skilled in the art from this disclosure that several simple deductions or substitutions can be made without departing from the inventive concepts of the present application.
Claims (10)
1. A chain clamp for vacuum flange interfacing, comprising: the chain comprises a plurality of clamping petals hinged with each other, the outer surfaces of the clamping petals are provided with fixing parts for butt joint of installation tools, and the head end and the tail end of the chain are provided with fastening screw holes for butt joint;
further comprises: a seal ring; the sealing ring is used for sealing between flanges, two sides of the sealing ring, which are opposite to the end face of the flange, are respectively provided with a convex part surrounding the periphery of the sealing ring, and the top of the convex part is continuously contracted, so that the axial section of the convex part is in a trapezoid or triangle blade shape;
the sealing ring is characterized in that a fixing piece is arranged on the circumferential surface of the sealing ring, the fixing piece extends to two sides along the axial direction of the sealing ring to form an arc shape, an assembling part is arranged on the circumferential surface of the sealing ring, and the assembling part comprises a notch positioned on the surface of the fixing piece and a cavity communicated with the notch.
2. A chain stay for vacuum flange butt joint according to claim 1, wherein the fixing portion is a fixing screw hole provided in a surface of the clip.
3. A chain stay for vacuum flange butt joint according to claim 2, wherein the chains are butt-jointed to each other by fastening bolts fitted to the fastening screw holes.
4. A chain clamp for vacuum flange interfacing according to claim 1, characterised in that the clamp comprises two chains which can be interfaced in a circular ring, each chain comprising two clamping flaps.
5. A tool for installing a chain stay, characterized in that the stay is a chain stay according to claim 3, the tool comprising a mounting member including a mounting rod, the mounting rod being provided at an end with a working portion for screwing the fastening bolt;
the clamp comprises a clamp body, wherein the clamp body comprises an extensible telescopic rod, the end part of the telescopic rod is provided with a fixed block, the middle parts of the two side surfaces of the fixed block are respectively provided with a concave clamping groove, one end of each clamping groove is opened along the length direction of each clamping groove, the other end of each clamping groove is closed, a spacing part for connecting the top surface and the bottom surface of the fixed block is arranged between the two clamping grooves, the spacing parts are matched with the gaps, and the bottom surface of the fixed block is matched with the cavity.
6. The tool of claim 5, further comprising a fastener stem, the end of the fastener stem having an extension provided with threads adapted to the fastener screw hole.
7. The tool of claim 6, wherein the tail of the securing lever is provided with a handle perpendicular to its axial direction.
8. A method of installing a vacuum flange, comprising:
the method comprises the steps of presetting, screwing an extension section of a fixing rod into a fixing screw hole of a chain type clamp, and encircling the clamp at a joint of flanges; the chain type clamp is used for butt joint of vacuum flanges according to claim 3; the fixing rod is the fixing rod in claim 6 or 7;
the fixing clamp is used for fixing the fastening bolt at the end part of the working part of the mounting rod and screwing the fastening bolt into a fastening screw hole at the butt joint part of the chain clamp; the mounting bar is the mounting bar of any one of claims 5-7;
and retracting the mounting tool to retract the fixing rod and the mounting rod.
9. The method of installing a vacuum flange according to claim 8, wherein the pre-positioning further comprises:
and installing the sealing ring, and arranging the sealing ring between the flange surfaces.
10. A method of installing a vacuum flange as claimed in claim 8, wherein the sealing ring is a metal sealing ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810108090.4A CN108194727B (en) | 2018-02-02 | 2018-02-02 | Chain clamp for vacuum flange butt joint, mounting tool and mounting method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810108090.4A CN108194727B (en) | 2018-02-02 | 2018-02-02 | Chain clamp for vacuum flange butt joint, mounting tool and mounting method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108194727A CN108194727A (en) | 2018-06-22 |
| CN108194727B true CN108194727B (en) | 2024-01-30 |
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ID=62592307
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810108090.4A Active CN108194727B (en) | 2018-02-02 | 2018-02-02 | Chain clamp for vacuum flange butt joint, mounting tool and mounting method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108194727B (en) |
Families Citing this family (3)
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|---|---|---|---|---|
| CN109058656A (en) * | 2018-08-15 | 2018-12-21 | 贵州大学 | A kind of shale gas conveyance conduit |
| CN110307417A (en) * | 2019-07-06 | 2019-10-08 | 潍坊华宝机械制造有限公司 | Hoop component |
| CN111447723B (en) * | 2020-04-09 | 2022-06-03 | 西北核技术研究院 | Knife edge sealing type quick-release flange assembly applied to accelerator vacuum system |
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| CN107263373A (en) * | 2017-08-18 | 2017-10-20 | 中国航发贵州黎阳航空动力有限公司 | A kind of magnetic tool installed for adjusting screw |
| CN208221820U (en) * | 2018-02-02 | 2018-12-11 | 东莞中子科学中心 | Chain clasp and installation tool for vacuum flange docking |
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| CN108194727A (en) | 2018-06-22 |
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