CN218118582U - End sealing assembly for steel seamless nuclear power storage tank and nuclear power storage tank - Google Patents
End sealing assembly for steel seamless nuclear power storage tank and nuclear power storage tank Download PDFInfo
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- CN218118582U CN218118582U CN202222767900.1U CN202222767900U CN218118582U CN 218118582 U CN218118582 U CN 218118582U CN 202222767900 U CN202222767900 U CN 202222767900U CN 218118582 U CN218118582 U CN 218118582U
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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
Abstract
The utility model provides a seamless nuclear power storage tank of steel is with tip seal assembly and nuclear power storage tank, seamless nuclear power storage tank of steel tip seal assembly, include: the bottle comprises a bottle mouth, a bottle cover and a sealing ring, wherein a threaded connecting part is arranged on the side wall of an inner hole of the bottle mouth; the TA titanium gasket is arranged at the gasket mounting part of the bottle mouth; the plug screw, including sealing thread, plug screw sealing and compress tightly the boss, when sealing thread and threaded connection portion threaded connection, plug screw sealing with tank sealing forms the face seal, compress tightly the boss can with TA titanium gasket crimping connects to gasket installation department sealed fixed. Seamless nuclear power storage tank end seal subassembly of steel, adopt the bottleneck to process into conical surface + step pattern, can improve the high-pressure leakproofness of nuclear power storage tank by a wide margin, avoid the nuclear power storage tank to take place because of the gas leakage phenomenon that sealing element bearing capacity problem leads to, avoid the gas leakage phenomenon to take place.
Description
Technical Field
The utility model relates to a pressure vessel technical field, in particular to seamless nuclear power storage tank tip seal assembly of steel and nuclear power storage tank.
Background
In the nuclear power field, a steel seamless nuclear power storage tank (hereinafter referred to as a nuclear power storage tank) has the main functions of storing compressed air with breathable quality at ordinary times and continuously providing emergency air supply to a pressure boundary of a main control chamber within a certain time after an accident. At present, the main sealing mode of the nuclear power storage tank is end face sealing, namely, two ends of the nuclear power storage tank are sealed by extruding of end face fluororubber O-shaped rings to guarantee sealing performance, and the structure is shown in fig. 4.
However, studies have shown that: when the working pressure is larger than 10MPa, the O-shaped ring is extruded out due to overlarge pressure during sealing, so that the sealing effect is greatly reduced. In other fields, aiming at the situation, a composite sealing mode of a fluororubber O-shaped ring and a polytetrafluoroethylene K-shaped ring is generally adopted, the sealing capability is obviously improved, and the high-pressure storage tank with the working pressure of 50MPa can be sealed at most. However, in the nuclear power field, the sealing mode cannot be used in a nuclear power storage tank because the polytetrafluoroethylene is easy to precipitate a fluoride compound in the using process.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model aims at providing a seamless nuclear power storage tank end seal subassembly of steel and nuclear power storage tank effectively solves the high-pressure leakproofness a difficult problem that the nuclear power storage tank that current operating pressure is not less than 20MPa, guarantees the high-pressure leakproofness of nuclear power storage tank, and then improves the safe reliability in utilization of nuclear power storage tank.
In order to achieve the above purpose, the technical scheme of the utility model is realized as follows:
a steel seamless nuclear power storage tank end seal assembly, comprising:
the bottle comprises a bottle mouth, a bottle cover and a sealing ring, wherein a threaded connecting part is arranged on the side wall of an inner hole of the bottle mouth;
the TA titanium gasket is arranged on the gasket mounting part of the bottle mouth;
the plug screw, including sealed screw thread, plug screw sealing portion and compress tightly the boss, when sealed screw thread and threaded connection portion threaded connection, plug screw sealing portion with the jar sealing portion forms the face seal, compress tightly the boss can with TA titanium gasket crimping to gasket installation department sealed fixed.
Furthermore, the jar sealing portion is the circular platform cambered surface setting of slope, corresponds the plug screw sealing portion is the circular platform cambered surface setting of slope, the jar sealing portion with form the conical surface between the plug screw sealing portion and seal.
Furthermore, the angle between the conical surfaces of the tank sealing part is alpha, and the value range of the alpha is 55-120 degrees.
Further, an angle between tapered surfaces of the plug seal portion is β, β = α -b.
Furthermore, the gasket installation part is arranged in a step shape and comprises a step surface, and the TA titanium gasket is placed on the step surface.
Furthermore, the distance between the step surface and the end part of the bottle mouth is L 1 The thickness of the TA titanium gasket is L 2 Wherein, said L 2 ＞L 1 。
Further, the TA titanium gasket can fill the whole step surface when being deformed under pressure.
Compared with the prior art, seamless nuclear power storage tank tip seal assembly of steel have following advantage:
(1) Seamless nuclear power storage tank tip seal assembly of steel, improve through the bottleneck structure to the nuclear power storage tank for the plug screw forms the double seal structure that front portion face is sealed and rear portion gasket is sealed with the bottleneck in the installation, improves its sealed effect.
(2) Seamless nuclear power storage tank end seal subassembly of steel, the chooseing for use of the sealed form of bottleneck and the gasket material of nuclear power storage tank, the bottleneck is processed into conical surface + step pattern, can improve the high-pressure leakproofness of nuclear power storage tank by a wide margin, avoids the nuclear power storage tank to take place because of the gas leakage phenomenon that sealing element bearing capacity problem leads to, avoids the gas leakage phenomenon to take place.
Another object of the utility model is to provide a nuclear power storage tank, the operating pressure of nuclear power storage tank should not be less than 20MPa the tip of nuclear power storage tank is provided with as above the seamless nuclear power storage tank tip seal assembly of steel.
Compared with the prior art, the electric storage tank and the steel seamless nuclear power storage tank end sealing assembly have the same advantages, and are not described again.
Drawings
The accompanying drawings, which form a part hereof, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation. In the drawings:
fig. 1 is a schematic structural view of bottle openings at two ends of a nuclear power storage tank according to an embodiment of the present invention;
FIG. 2 is a schematic structural view of the assembly of a bottle mouth and a plug screw of a nuclear power storage tank according to an embodiment of the present invention;
FIG. 3 is a schematic view of the end of a steel nuclear power storage tank being threaded according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a prior art nuclear storage tank end seal;
description of reference numerals:
the bottle opening 1, the threaded connection part 101, the can sealing part 102, the gasket mounting part 103, the step surface 1031, the TA titanium gasket 2, the plug screw 3, the sealing thread 301, the plug screw sealing part 302 and the pressing boss 303.
Detailed Description
In order to make the technical means, the purpose and the functions of the present invention easy to understand, embodiments of the present invention will be described in detail with reference to the specific drawings.
It should be noted that all terms used in the present invention to indicate directionality and location, such as: the terms "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "inner", "outer", "top", "lower", "transverse", "longitudinal", "center", etc. are used only for explaining the relative positional relationship, connection conditions, etc. between the respective members in a certain specific state (as shown in the drawings), and are only for convenience of description of the present invention, and do not require that the present invention must be constructed and operated in a specific orientation, and therefore, should not be construed as limiting the present invention. Furthermore, the descriptions in the present application related to "first", "second", etc. are for descriptive purposes only and are not to be construed as indicating or implying relative importance or to imply that the number of technical features indicated are implicitly being indicated.
In the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning a fixed connection, a removable connection, or an integral connection; may be a mechanical connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Example 1
As shown in fig. 1-2, the utility model discloses a seamless nuclear power storage tank tip seal assembly of steel, include:
the bottle mouth 1 is provided with a threaded connection part 101 on the side wall of an inner hole, and a tank sealing part 102 and a gasket mounting part 103 are sequentially arranged on one side of the threaded connection part 101;
a TA titanium gasket 2 provided in the gasket mounting portion 103 of the bottle mouth 1;
the plug screw 3 comprises a sealing thread 301, a plug screw sealing part 302 and a pressing boss 303, when the sealing thread 301 is in threaded connection with the threaded connection part 101, the plug screw sealing part 302 and the tank sealing part 102 form surface sealing/line sealing, and the pressing boss 303 can press the TA titanium gasket 2 to be in sealing fixation with the gasket installation part 103.
The utility model discloses steel seamless nuclear power storage tank tip seal assembly improves processing through bottleneck 1 to steel seamless nuclear power storage tank, and bottleneck 1 after the improvement forms jar sealing 102 and gasket installation department 103 in one side for plug screw 3 when the installation, plug screw 3's sealed screw thread 301 with when threaded connection portion 101 of bottleneck 1 screwed through the screw thread, plug screw 3's sealed screw thread 301 is continuous to be stretched into bottleneck 1, in this motion process, plug screw 3's plug screw sealing 302 with jar sealing 102 sealing contact of bottleneck 1 forms face seal/line seal structure, further stretches into along with plug screw 3's sealed screw thread 301 bottleneck 1, plug screw 3's the boss 303 that compresses tightly TA titanium gasket 2 extremely the gasket installation department 103 of bottleneck 1 to form the sealed dual seal structure of front portion face seal/line and rear portion gasket.
The utility model discloses a seamless nuclear power storage tank tip seal assembly of steel improves through the bottleneck structure to the nuclear power storage tank for plug screw 3 forms the double seal structure that front portion face is sealed and rear portion gasket is sealed in the installation with bottleneck 1, improves its sealed effect.
As an example of the present invention, the can sealing portion 102 is a tilted circular truncated cone arc surface, and correspondingly the plug sealing portion 302 is a tilted circular truncated cone arc surface, and the can sealing portion 102 and the plug sealing portion 302 form a conical surface seal therebetween.
This setting is convenient for the plug screw 3 on the one hand and leads when the screw is screwed and is stretched into bottleneck 1, guarantees the convenience and the flow nature of plug screw 3 installation, simultaneously at can sealing portion 102 with the conical surface that the plug screw sealing portion 302 formed is sealed, has also further improved the sealed effect of front portion face seal.
As an example of the present invention, the angle between the tapered surfaces of the can sealing portion 102 is α, and the value range of α is 55 ° to 120 °. The angle between the tapered surfaces of the plug seal portion 302 is β, β = α -b. Preferably, b is in the range of 0.5 ° to 2 °, and preferably, b is 1 °.
Preferably, the angle between the conical surfaces of the can sealing portion 102 in the bottle mouth 1 of the present invention is 75 °, the angle between the conical surfaces of the plug screw 3 machined at the rear portion of the sealing thread 301 is 74 °, and the convenience and the sealing property of the plug screw 3 and the bottle mouth 1 are ensured.
As an example of the present invention, the gasket mounting portion 103 is a step-shaped arrangement, including the step surface 1031, the TA titanium gasket 2 is placed on the step surface 1031.
Through setting up gasket installation portion 103 to the step accommodation structure, combine the material performance of TA titanium gasket 2 for when TA titanium gasket 2 fixes and seals on step face 1031, TA titanium gasket 2 receives compressive stress, receives extrusion deformation, and whole sealed step is filled completely to the material, improves by a wide margin, TA titanium gasket 2's sealing performance.
As an example of the present invention, the step surface 1031 is distant from the end of the bottle mouth 1 by L 1 The thickness of the TA titanium gasket 2 is L 2 Wherein, said L 2 ＞L 1 。
The arrangement enables the TA titanium gasket 2 to extend out of the gasket mounting portion 103, and the TA titanium gasket is compressed by the compression boss 303 when being screwed by the plug screw 3, so that the whole sealing step can be filled when the TA titanium gasket is compressed and deformed, and the sealing performance of the TA titanium gasket 2 is further improved.
The application the seamless nuclear power storage tank tip seal assembly of steel, effectively solve the high-pressure leakproofness difficult problem of the nuclear power storage tank that current operating pressure is not less than 20MPa, its modified core lies in, the chooseing of 1 sealed forms of bottleneck and gasket material of nuclear power storage tank, bottleneck 1 is processed into conical surface + step pattern, process corresponding conical surface and compress tightly boss 303 on the plug screw 3, when installing plug screw 3 and TA titanium gasket 2, plug screw sealing portion 302 conical surface and jar sealing portion 102 conical surface contact on 1 of bottleneck on the plug screw 3, because the conical surface angle of plug screw 3 is less than 1 conical surface of bottleneck, form a line seal on the conical surface of bottleneck 1, TA titanium gasket 2 is fixed on the step surface 1031 of the place of gasket installation department 103 on 1 of bottleneck, TA titanium gasket 2 receives compressive stress, receive the extrusion deformation, whole sealed step is filled completely to the material, improve TA titanium gasket 2's sealing performance by a wide margin. Meanwhile, because the copper alloy is forbidden in the nuclear power field, the gasket material is changed into industrial pure titanium with a higher melting point, and the applicability of the sealing element material in the nuclear power field is effectively ensured on the premise of ensuring the sealing effect.
The design of the sealing structure can greatly improve the high-pressure sealing performance of the nuclear power storage tank and avoid the gas leakage phenomenon of the nuclear power storage tank caused by the problem of the pressure bearing capacity of the sealing element. The nuclear power air storage tank can greatly improve the high-pressure sealing performance of the nuclear power air storage tank by adopting the sealing assembly in the nuclear power air storage tank, and the phenomenon of gas leakage is avoided.
As a specific example of the present invention, the utility model discloses a seamless nuclear power storage tank tip seal assembly of steel, its main working method includes following content:
1) And (3) processing bottle mouths at two ends of the nuclear power storage tank, wherein the structure of the processed bottle mouths is shown in figure 1. The bottle mouth structure has the following characteristics:
(1) the structure is a double-sealing structure, and the sealing effect is ensured mainly by a double-sealing mode of front conical surface sealing and rear gasket sealing;
(2) the angle of the inner hole conical surface of the front conical surface sealing structure is 75 degrees, and the sealing effect is ensured.
(3) The gasket mounting portion 103 for sealing the gasket is formed with a step at the rear portion, and the gasket is plastically deformed during mounting to provide a sealing effect.
2) And machining a screw plug 3, wherein the screw plug 3 is provided with a conical surface of a screw plug sealing part 302 at the rear part of the sealing thread 301, the angle of the conical surface is 74 degrees, and a gasket mounting part 103 for gasket pressing is machined after the screw plug sealing part 302.
3) Processing a sealing TA titanium gasket 2, selecting an industrial pure titanium material, and processing the titanium gasket, wherein the thickness of the titanium gasket is greater than the height of a step of a gasket mounting part 103 at a nuclear power storage tank bottle opening 1;
3) Before use, the titanium gasket is subjected to softening annealing treatment, the hardness of the gasket after the softening annealing treatment is within the range of HB 35-HB 50, and the gasket after the annealing treatment is used within 7 days so as to avoid hardness improvement and sealing capability reduction caused by natural aging;
4) Assembling a screw plug 3 and the annealed TA titanium gasket 2 on a bottle mouth 1 of a nuclear power storage tank, installing the screw plug 3 on the bottle mouth 1 of the nuclear power storage tank by using fixed torque installation equipment, wherein the installation torque of the screw plug 3 is fixed and large enough to ensure that the conical surface of the bottle mouth 1 is closely contacted with the conical surface of the screw plug 3, and the TA titanium gasket 2 at the rear part generates plastic deformation, so that a double sealing effect is achieved;
5) And carrying out integral air tightness test on the nuclear power storage tank by using air tightness test equipment, wherein the test pressure is the working pressure of the nuclear power storage tank, the test medium is dry and clean air or nitrogen, leak detection is carried out on the bottle mouth and the screw plug interface part by using leak detection liquid, and the interface part is qualified if no leak exists.
The sealing structure of the steel nuclear power storage tank with the working pressure of 27.6MPa and the specification of phi 610mm multiplied by 29.4mm multiplied by 6100mm is briefly introduced.
1) The end part of the steel nuclear power storage tank with the specification of phi 610mm multiplied by 29.4mm multiplied by 6100mm is subjected to thread machining, and the structure of the end part is shown in figure 3.
2) And (3) processing a screw plug 3, processing a conical surface at the rear part of the external thread of the screw plug 3, wherein the angle of the conical surface is 74 degrees, and the external thread is matched with the thread of the bottle mouth 1 of the nuclear power storage tank.
3) Selecting an industrial pure titanium material TA2, and processing a titanium gasket, wherein the size of the titanium gasket is phi 95mm multiplied by phi 82mm multiplied by 5.5mm;
4) Before use, the TA2 titanium gasket is subjected to softening annealing treatment, the hardness of the gasket after the softening annealing treatment is HB40, and the gasket is used on the 2 nd day after annealing;
5) Assembling the annealed TA2 titanium gasket on a nuclear power storage tank with the specification of phi 610mm multiplied by 29.4mm multiplied by 6100mm, and installing a screw plug to a bottle mouth 1 of the nuclear power storage tank by using fixed torque installation equipment, wherein the installation torque of the screw plug 3 is 5000N.m;
6) And carrying out integral air tightness test on the nuclear power storage tank by using air tightness test equipment, wherein the test pressure is 27.6MPa, the test medium is dry and clean air or nitrogen, the leak detection liquid is used for carrying out leak detection on the interface part of the bottle mouth and the screw plug, the interface part has no leakage, and the air tightness test is qualified.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. The utility model provides a steel is tip seal assembly for seamless nuclear power storage tank which characterized in that includes:
the bottle opening (1) is provided with a threaded connecting part (101) on the side wall of an inner hole of the bottle opening, and a can sealing part (102) and a gasket mounting part (103) are sequentially arranged on one side of the threaded connecting part (101);
a TA titanium gasket (2) provided in a gasket attachment part (103) of the bottle mouth (1);
plug screw (3), including sealing thread (301), plug screw sealing portion (302) and compress tightly boss (303), when sealing thread (301) and threaded connection portion (101) threaded connection, plug screw sealing portion (302) with can sealing portion (102) forms the face and seals, it can with to compress tightly boss (303) TA titanium gasket (2) crimping to gasket installation department (103) sealing fixation.
2. The end seal assembly for the steel seamless nuclear power storage tank of claim 1, wherein the tank sealing portion (102) is formed as an inclined frustoconical arc and the corresponding plug sealing portion (302) is formed as an inclined frustoconical arc, the conical surface seal being formed between the tank sealing portion (102) and the plug sealing portion (302).
3. The end seal assembly for the steel seamless nuclear power storage tank of claim 2, wherein the angle between the conical surfaces of the tank seal portion (102) is α, and the value of α ranges from 55 ° to 120 °.
4. The end seal assembly for a seamless steel nuclear power storage tank of claim 3 wherein the angle between the tapered surfaces of the plug seal portion (302) is β, β = α -b.
5. The end sealing assembly for the steel seamless nuclear power storage tank as claimed in any one of claims 1 to 4, wherein the gasket mounting portion (103) is arranged in a step shape and comprises a step surface (1031), and the TA titanium gasket (2) is placed on the step surface (1031).
6. The end sealing assembly for the steel seamless nuclear power storage tank as claimed in claim 5, wherein the distance from the step surface (1031) to the end of the bottle mouth (1) is L 1 The thickness of the TA titanium gasket (2) is L 2 Wherein, said L 2 ＞L 1 。
7. The end seal assembly for the seamless steel nuclear power storage tank of claim 6 wherein the TA titanium gasket (2) fills the entire step surface (1031) when deformed under pressure.
8. A nuclear power storage tank is characterized in that the working pressure of the nuclear power storage tank is not lower than 20MPa, and the end part of the nuclear power storage tank is provided with the end part sealing assembly for the steel seamless nuclear power storage tank as claimed in any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222767900.1U CN218118582U (en) | 2022-10-20 | 2022-10-20 | End sealing assembly for steel seamless nuclear power storage tank and nuclear power storage tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222767900.1U CN218118582U (en) | 2022-10-20 | 2022-10-20 | End sealing assembly for steel seamless nuclear power storage tank and nuclear power storage tank |
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| Publication Number | Publication Date |
|---|---|
| CN218118582U true CN218118582U (en) | 2022-12-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222767900.1U Active CN218118582U (en) | 2022-10-20 | 2022-10-20 | End sealing assembly for steel seamless nuclear power storage tank and nuclear power storage tank |
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| CN (1) | CN218118582U (en) |
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- 2022-10-20 CN CN202222767900.1U patent/CN218118582U/en active Active
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