CN106991257A - A kind of computational methods of sealing for pressure vessels locking mechanism - Google Patents
A kind of computational methods of sealing for pressure vessels locking mechanism Download PDFInfo
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- CN106991257A CN106991257A CN201710324585.6A CN201710324585A CN106991257A CN 106991257 A CN106991257 A CN 106991257A CN 201710324585 A CN201710324585 A CN 201710324585A CN 106991257 A CN106991257 A CN 106991257A
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Abstract
The invention discloses a kind of computational methods of sealing for pressure vessels locking mechanism.The calculation formula of minimum sealing force of this method first according to needed for force balance principle obtains the lower sealing locking structure of pressure effect；Obtain the average shearing stress expression formula of shearing resistance steel ball sectional median plane；Further according to annular channel center circle diameter L and shearing resistance steel ball radius r relation, the average shearing stress expression formula needed for sealing locking structure is obtained, and calculating obtains average shearing stress；The permission shear stress of average shearing stress and shearing resistance steel ball material is compared, designing satisfaction if average shearing stress is less than permission shear stress requires, and determines shearing resistance steel ball number.Method is determined The present invention gives shearing resistance steel ball shear stress basis for estimation and number, reference is provided for the design of sealing locking structure, and gives the relation between each parameter, the optimization design for novel seal locking mechanism provides important evidence.
Description
Technical field
The invention belongs to design of pressure vessels field, a kind of calculating side of sealing for pressure vessels locking mechanism is specifically related to
Method.
Background technology
GB150.1~150.4-2011《Pressure vessel》The pressure vessel that middle design pressure is not higher than 35MPa is recommended to select
Sealing structure have metal flat gasket, biconical ring seal, wood closure, Cachaly seal, clip fast-open type sealing etc. pattern.
《High-pressure bottle is designed》Middle recommendation opens class high-pressure container sealing structure and couples pattern from non-bolt soon, comprising clamp connection, resists
Cut bolt-connection, shear-pin connection and anti-shear ring connection.High parameter is constantly moved towards in the development of pressure vessel in recent years, from anti-
Cutting the sealing structure of connection, shearing resistance part is easily killed under pressure, and not easy to remove, operational efficiency is low；From clip and
The locking mechanism of other flanges connection is processed using large forgings, and manufacture difficulty is big, and cost is high.The problem of for said structure,
Technical staff devises a kind of new sealing for pressure vessels locking mechanism, and as shown in Figure 1, 2, the sealing locking structure is included in
The first annular recess and the outer peripheral face of top cover 4 in pressure vessel opened up in the internal face circumference of barrel end 1 of pressure vessel
On the second annular recess for opening up, the outer peripheral face of top cover 4 and the cylinder after the top cover 4 is arranged on the barrel end 1
The laminating of body end portion 1 internal face, both first annular recess and the second annular recess notch are relative and Formation cross-section is circular
Annular channel A, the annular channel A in filled with the shearing resistance steel ball 3 for causing the barrel end 1 and top cover 4 to realize locking,
Offered on the barrel end 1 communicated with the annular channel enter ball 6 and spherical cavity 7.The sealing locking structure
The installation locking of pressure container cylinder end and top cover is realized by shearing resistance steel ball, changes what conventional sealing locking structure was used
The locking mechanism patterns, the sealing such as flange connection, clamp connection, shearing bolt connection, shear-pin connection and anti-shear ring connection
The weight of barrel end and top cover greatly reduces in locking mechanism, reduces the cost of container, and safety in operation is good, economy effect
It is beneficial notable.The shearing resistance steel ball is the critical component of the sealing locking structure, then in installation, before use, how to described
Shearing resistance steel ball sets up corresponding fail-ure criterion foundation and how to determine that shearing resistance steel ball number is just particularly important.
The content of the invention
In order to solve the above-mentioned technical problem, the present invention provides a kind of computational methods of sealing for pressure vessels locking mechanism.Should
The failure basis for estimation and number that method provides shearing resistance steel ball determine method, are that the application of corresponding sealing locking structure is carried
Theoretical calculation foundation is supplied.
In order to realize the purpose of the present invention, present invention employs following technical scheme：
A kind of computational methods of sealing for pressure vessels locking mechanism, comprise the following steps：
S1, clear and definite design of pressure vessels parameter and shearing resistance steel ball material；
S2, according to force balance principle, calculate the minimum sealing force F needed under the effect of design of pressure vessels pressure, calculate
Formula is as follows：
P is design of pressure vessels pressure in formula, and D is sealing surface diameter；
S3, by step S2 calculate obtain minimum sealing force F calculate obtain shearing resistance steel ball sectional median plane be averaged cut should
Power τ, calculation formula is as follows：
N is shearing resistance steel ball number in formula, and r is shearing resistance steel ball radius；
Relation is as follows between S4, circular annular form channel center circular diameter L and shearing resistance steel ball radius r：
π L=2Nr,
S5, by step S4 relational expression substitute into step S3, equation below can be obtained：
S6, according to TSG21-2016《Fixed safe technology of pressure vessel Supervision Code》It is required that, the shearing resistance steel ball material
The permission shear stress of material should meet following requirements：
[τ]=σs/ n,
σ in formulasFor the yield stress drop-out value of shearing resistance steel ball material, n values are 2.5~3.5；
S7, step S5 result of calculation and step S6 result of calculation contrasted, such as τ ＜ [τ] then meet use requirement,
Otherwise adjusting parameter r is recalculated according still further to above-mentioned steps；
S8, the result of calculation of the step S7 are met after τ ＜ [τ], and shearing resistance steel ball is calculated using step S4 relational expression
Number, calculation formula is as follows：
The number of shearing resistance steel ball needed for being to result of calculation round numbers；
S9, completion are calculated.
The beneficial effects of the present invention are：
(1) present invention is counted to the critical component shearing resistance steel ball of the sealing locking structure of above-mentioned novel pressure container
Calculate, it is ensured that under design pressure conditioning, shearing resistance steel ball meets design use requirement, be answering for such a sealing locking structure
Theoretical calculation foundation is provided with promoting.The present invention is used to calculate under the effect of design of pressure vessels pressure, shearing resistance steel ball section
The maximum shear stress born so that shear stress is less than the permission shear stress of shearing resistance steel ball material, it is ensured that shearing resistance steel ball exists
Rupture will not be sheared under high pressure effect, and selects suitable steel ball number.The dense block tight knot of computational methods design of the present invention
Structure is applied on corresponding pressure vessel, is as a result shown：Pressure vessel is stable, safety, meets use requirement.
(2) present invention determine that design of pressure vessels pressure P, size of seal contact face D, circular annular form channel center circular diameter L,
With the relation between shearing resistance steel ball radius r, determine to provide foundation for the optimization design of novel pressure container sealing locking structure.
(3) present invention determine that the fail-ure criterion of shearing resistance steel ball is according to there is provided the basis for selecting for allowing shear stress.This hair
It is bright to further define the selected formula of shearing resistance steel ball number.
Brief description of the drawings
Fig. 1 is sealing locking structure schematic diagram.
Fig. 2 is self-tightening sealing modular construction schematic diagram.
The implication marked in accompanying drawing is as follows：
1- barrel end 2- self-tightening sealing part 3- shearing resistance steel ball 4- top cover 5- limiting components 6- enters ball 7- and goes out ball
Hole 8- seals the spring sealed circle 11- filler ring A- annular channels of face ring 9-O shape sealing rings 10-
Embodiment
Before the present invention is specifically described, the sealing locking structure shown in Fig. 1,2 is described in detail first：
The sealing locking structure be included in the first annular recess for being opened up in the circumference of barrel end 1 of pressure vessel and
The second annular recess opened up in the circumference of top cover 4 of pressure vessel, institute after the top cover 4 is arranged on the barrel end 1
State that both the first annular recess and the second annular recess notches are relative and to form cross section be circular annular channel A, the ring
Filled with the shearing resistance steel ball 3 for causing the barrel end 1 to realize locking with top cover 4 in shape passage A.The present invention changes in the past close
Block the locking knots such as flange connection, clamp connection, shearing bolt connection, shear-pin connection and anti-shear ring connection that locking structure is used
Configuration formula, and the pattern for employing shearing resistance steel ball 3 is locked, this provides a kind of new mode for the sealing locking of container,
The weight of barrel end 1 and top cover 4 greatly reduces in sealing locking structure of the present invention, reduces the cost of container, operation peace
Good perfection, remarkable in economical benefits.
The outer peripheral face of top cover 4 is fitted with the inner wall of end face of barrel end 1, and the first annular recess section is half
It is circular and positioned at the internal face of barrel end 1, the second annular recess section be it is semicircle and positioned at the outer peripheral face of top cover 4, it is described
Offered between the internal face of barrel end 1 and the outer peripheral face of top cover 4 communicated with the annular channel A enter ball 6, the cylinder end
The side of portion 1 offers the spherical cavity 7 connected with the annular channel A, the diameter of the shearing resistance steel ball 3 and the annular channel A
Cross-sectional diameter coincide substantially.The shearing section of the shearing resistance steel ball 3 is vertical with the radial direction of the barrel end 1.It is described enter
Ball 6 is obliquely installed towards the annular channel A, and the spherical cavity 7 is obliquely installed towards the side-lower of barrel end 1.
Shearing resistance steel ball 3 of the present invention and it is supporting enter ball 6, spherical cavity 7 also solve conventional high-tension sealing for pressure vessels
The unlatching difficult problem of locking mechanism, is easy to be opened and closed the invention enables pressure vessels top cover, can reduce operation difficult
Degree requires and good economy performance that the present invention, which has abandoned conventional high-pressure bottle design, needs supporting hydraulic pressure (or machinery) auxiliary body etc.,
Operating cost is greatly reduced.
It is described enter ball 6 be used for top cover 4 be arranged on barrel end 1 on after into the annular channel A fill shearing resistance steel
Ball 3, can be used for top cover 4 needs auxiliary during unlatching to discharge the shearing resistance steel ball 3 by the spherical cavity 7, and the present invention makes
The barrel end 1 and top cover 4 for obtaining pressure vessel are easy to be mounted locking, fixed.
The top cover 4 is provided with the limiting component 5 for realizing location and installation with the barrel end 1, and the limiting component 5 is wrapped
Spacing hole and positioning pin are included, the barrel end 1 is provided with spacing hole provided with positioning pin, the top cover 4.It is described spacing
Part 5 aids in the top cover 4 being installed on barrel end 1 according to design and installation size, it is ensured that top cover 4 and self-tightening sealing part
2 smooth installation, can also aid in the smooth dismounting of top cover and self-tightening sealing part, it is to avoid top cover 4 is circumferentially rotated along barrel end 1
Or position skew radially occurs along barrel end 1, it is ensured that the self-tightening sealing part 2 and the inwall of barrel end 1 after installing repeatedly
The reliability and security of circumferential seal.
The medial surface of top cover 4 is fixed with the self-tightening sealing part 2 with the inwall circumferential seal of barrel end 1.It is described
Self-tightening sealing part 2 includes being fixed on the sealing face ring 8 of the medial surface of top cover 4, and the ring-type of the sealing outer peripheral face of face ring 8 is close
It is provided with sealing groove and O-ring seals 9 and spring sealed circle 10 that sealing coordinates circumferentially is formed with the inwall of barrel end 1.
Self-tightening sealing part 2 of the present invention is solved for axial displacement sealing problem in manufacture and design, and sealing effectiveness is protruded,
It ensure that the safety and reliability of pressure vessel operation.
It is installation and the method for dismounting of the sealing locking structure below：
Step 1：Top cover 4 is installed among barrel end 1 by the auxiliary of location structure limiting component 5, it is ensured that top
The smooth installation of lid 4 and self-tightening sealing part 2, it is ensured that sealedly reliable and safety.
Step 2：Opened up after top cover 4 and the installation of barrel end 1 by entering ball 6 between barrel end 1 and top cover 4
Annular channel A in filling shearing resistance steel ball 3, it is desirable to fill the quantity of steel ball 3 no less than the quantity needed for calculating, and ensure uniform
Distribution.Filling completes rear enclosed goal hole 6, it is ensured that the stability of shearing resistance steel ball 3 and prevent shearing resistance steel ball 3 in container operation process
In de- jump, the locking of this sealing locking structure is completed to this, the further work of equipment can be carried out.
Step 3：DE device end, ensure container can with safe opening after carry out the unlatching of this sealing locking structure,
Spherical cavity 7 is opened, the gap between the removal hole, barrel end 1 and top cover 4 that are arranged on barrel end 1 or goal can be passed through
Hole etc., aids in mobile shearing resistance steel ball 3 by steel bar, all shearing resistance steel balls 3 is removed annular channel A, i.e., dialled by the steel bar
The dynamic shearing resistance steel ball 3 in annular channel A so that shearing resistance steel ball 3 is rolled out from spherical cavity 7.
Step 4：All shearing resistance steel balls 3 are removed after annular channel A, are aided in by limiting component 5 by top cover 4 from barrel end
Removed on 1, that is, complete the unlatching of this sealing locking structure.
Actual use and design process in can also be realized by adjusting the form of annular channel shearing resistance steel ball 3 from
It is dynamic to remove, the installation of top cover 4 and self-tightening sealing part 2 can also be preferably aided in by improveing positioning element 5, can also led to
Cross and improve into ball 6 and spherical cavity 7 so that the installation and dismounting of shearing resistance steel ball 3 are more convenient.
And in the fabrication process it must also be noted that the manufacturing tolerance of barrel end 1 and top cover 4 and the fitting surface of self-tightening sealing part 2
And coordinate, pass through the concentricity, flatness, perpendicularity to mating surface it is corresponding with roughness propositions requirement, it is ensured that top cover 4 it is smooth
Install and sealed reliability.The manufacturing tolerance for the annular channel A for also needing to process between barrel end 1 and top cover 4 by adjusting,
The hardness of material hardness and shearing resistance steel ball 3 at passage, come ensure shearing resistance steel ball 3 smooth dismounting and barrel end 1 and top cover 4 it
Between the reliability that connects.
The computational methods of the sealing for pressure vessels locking mechanism of the present invention are described in detail with reference to embodiment：
The material type of step 1, clear and definite design of pressure vessels parameter and shearing resistance steel ball；
In the present embodiment, design of pressure vessels pressure P=30MPa, size of seal contact face D=510mm, in circular annular form passage
Circle diameter L=560mm, shearing resistance steel ball yield strength σs=345MPa, radius r=20mm；The size of seal contact face D is referred to
The external diameter of face ring 8 is sealed in the sealing locking structure；
Step 2, calculating obtain the average shearing stress τ of shearing resistance steel ball sectional median plane；
According to the formula：
Calculating obtains τ=110.9MPa；
Step 3, the maximum allowable shear stress of calculating；
According to formula：[τ]=σs/ n,
σ in formulasFor the yield stress drop-out value of shearing resistance steel ball material；N is safety coefficient, related to material and r, and value is
2.5,
Calculating obtains maximum allowable shear stress [τ]=138MPa；
Step 4, the result of calculation of the result of calculation of the step 2 and step 3 contrasted, τ ＜ [τ], then shearing resistance steel ball
Design is met；
Shearing resistance steel ball number needed for step 5, calculating；
According to formula：
Calculating obtains N=44, steel ball quantity mesh.
Claims (1)
1. a kind of computational methods of sealing for pressure vessels locking mechanism, it is characterised in that comprise the following steps：
S1, clear and definite design of pressure vessels parameter and shearing resistance steel ball (3) material；
S2, according to force balance principle, calculate the minimum sealing force F needed under the effect of design of pressure vessels pressure, calculation formula
It is as follows：
P is design of pressure vessels pressure in formula, and D is sealing surface diameter；
S3, calculated by step S2 and to obtain minimum sealing force F and obtain the average shearing stress of shearing resistance steel ball (3) sectional median plane to calculate
τ, calculation formula is as follows：
N is shearing resistance steel ball (3) number in formula, and r is shearing resistance steel ball (3) radius；
Relation is as follows between S4, circular annular form passage (A) center circle diameter L and shearing resistance steel ball (3) radius r：
π L=2Nr,
S5, by step S4 relational expression substitute into step S3, equation below can be obtained：
S6, according to TSG21-2016《Fixed safe technology of pressure vessel Supervision Code》It is required that, shearing resistance steel ball (3) material
Permission shear stress should meet following requirements：
[τ]=σs/ n,
σ in formulasFor the yield stress drop-out value of shearing resistance steel ball material, n values are 2.5~3.5；
S7, step S5 result of calculation and step S6 result of calculation contrasted, such as τ ＜ [τ] then meet use requirement, otherwise
Adjusting parameter r is recalculated according still further to above-mentioned steps；
S8, the result of calculation of the step S7 are met after τ ＜ [τ], and the number of shearing resistance steel ball (3) is calculated using step S4 relational expression
Mesh, calculation formula is as follows：
The number of shearing resistance steel ball needed for being to result of calculation round numbers；
S9, completion are calculated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710324585.6A CN106991257B (en) | 2017-05-10 | 2017-05-10 | calculation method of pressure container sealing and locking structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710324585.6A CN106991257B (en) | 2017-05-10 | 2017-05-10 | calculation method of pressure container sealing and locking structure |
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| CN106991257A true CN106991257A (en) | 2017-07-28 |
| CN106991257B CN106991257B (en) | 2019-12-13 |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104114931A (en) * | 2011-12-05 | 2014-10-22 | 蓝波股份有限公司 | Ultra-high operating pressure vessel |
| CN105045965A (en) * | 2015-06-26 | 2015-11-11 | 西安交通大学 | Pressure vessel LPMS quality estimation method based on simulation database |
-
2017
- 2017-05-10 CN CN201710324585.6A patent/CN106991257B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104114931A (en) * | 2011-12-05 | 2014-10-22 | 蓝波股份有限公司 | Ultra-high operating pressure vessel |
| CN105045965A (en) * | 2015-06-26 | 2015-11-11 | 西安交通大学 | Pressure vessel LPMS quality estimation method based on simulation database |
Non-Patent Citations (2)
| Title |
|---|
| 范海俊 等: "大型液化气球罐现场安装技术及质量管理", 《化工装备技术》 * |
| 袁榕 等: "对某些CF6-62钢制压力容器中的裂纹分析与防止措施的建议", 《压力容器》 * |
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| CN106991257B (en) | 2019-12-13 |
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Address after: 230031 Hefei Changjiang Road, Shushan District, Anhui, No. 888 Applicant after: Hefei General Machinery Research Institute Co., Ltd. Applicant after: Hefei General Machinery Research Institute special equipment inspection station Co., Ltd. Address before: 230031 Hefei Changjiang Road, Shushan District, Anhui, No. 888 Applicant before: Hefei Universal Machinery Inst. Applicant before: Special Equipment Inspection Station of Hefei General Machinery Research Institute |
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