CN117419857A - Universal sealing test device and use method - Google Patents
Universal sealing test device and use method Download PDFInfo
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- CN117419857A CN117419857A CN202311242284.0A CN202311242284A CN117419857A CN 117419857 A CN117419857 A CN 117419857A CN 202311242284 A CN202311242284 A CN 202311242284A CN 117419857 A CN117419857 A CN 117419857A
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- 238000007789 sealing Methods 0.000 title claims abstract description 173
- 238000012360 testing method Methods 0.000 title claims abstract description 79
- 238000000034 method Methods 0.000 title claims abstract description 24
- 238000001514 detection method Methods 0.000 claims abstract description 65
- 210000001503 joint Anatomy 0.000 claims abstract description 24
- 238000007689 inspection Methods 0.000 claims abstract description 9
- 239000001307 helium Substances 0.000 claims description 11
- 229910052734 helium Inorganic materials 0.000 claims description 11
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 claims description 11
- 239000000344 soap Substances 0.000 claims description 8
- 238000001819 mass spectrum Methods 0.000 claims description 4
- 239000012153 distilled water Substances 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims 1
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 9
- 238000003825 pressing Methods 0.000 description 5
- 229910052757 nitrogen Inorganic materials 0.000 description 4
- 238000012795 verification Methods 0.000 description 4
- 230000000903 blocking effect Effects 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 239000003570 air Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 229920001973 fluoroelastomer Polymers 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000029058 respiratory gaseous exchange Effects 0.000 description 1
- 229920000260 silastic Polymers 0.000 description 1
- 238000010200 validation analysis Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
- G01M3/12—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point by observing elastic covers or coatings, e.g. soapy water
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
- G01M3/20—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material
- G01M3/202—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material using mass spectrometer detection systems
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
- G01M3/20—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material
- G01M3/202—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material using mass spectrometer detection systems
- G01M3/205—Accessories or associated equipment; Pump constructions
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
The invention provides a general seal test device and a use method, wherein the seal test device comprises: the upper flange, the lower flange, the outer inspection cover and the connecting pieces are connected up and down through the connecting pieces to form a first sealing space; the upper flange is connected with the outer detection cover up and down through a connecting piece, and a second sealing space is formed among the upper flange, the lower flange and the outer detection cover; and a sealing groove is arranged on the butt joint surface of the upper flange and the lower flange, and a sealing piece to be tested is arranged in the sealing groove. According to the embodiment of the invention, the to-be-tested sealing elements with different specifications can be detected by replacing the specifications of the upper flange and the lower flange, so that the operation is simple, the cost is low, and the universality is high.
Description
Technical Field
The invention relates to the technical field of sealing element detection, in particular to a universal sealing test device and a using method thereof.
Background
In the rocket launching process, various sealing structures exist in the heavy parts such as a carrier rocket storage tank, a pressurizing conveying pipeline, an engine and the like, wherein the sealing structures are most widely applied. In order to verify the sealing capability of the sealing ring, the rationality of torque application and the reliability of the sealing structure, the sealing piece and the sealing structure need to be tested and verified, however, the existing sealing test device or tool is mainly a sealing test tool of a test system or a special joint.
Therefore, there is a need for a universal seal test apparatus to enable seal test validation for different gauge seals.
Disclosure of Invention
In view of the above, an object of an embodiment of the present invention is to provide a general-purpose seal test apparatus and a method of using the same, which can realize seal test verification for seals of different specifications.
To achieve the above object, in a first aspect, an embodiment of the present invention provides a general-purpose seal test apparatus, including: the device comprises an upper flange, a lower flange, an outer detection cover and a plurality of connecting pieces, wherein the upper flange and the lower flange are connected up and down through the connecting pieces to form a first sealing space;
the upper flange is connected with the outer detection cover up and down through a connecting piece, and a second sealing space is formed among the upper flange, the lower flange and the outer detection cover;
and a sealing groove is formed in the butt joint surface of the upper flange and the lower flange, and a sealing piece to be tested is arranged in the sealing groove.
In some possible embodiments, at least two through joints are arranged on the upper flange positioned at the first sealing space and are respectively used for filling leakage detection medium into the first sealing space and performing sealing detection on the sealing element to be tested;
and at least two straight-through connectors are arranged on the outer detection cover and are respectively used for filling leakage detection medium into the second sealing space and carrying out sealing detection on the sealing piece to be tested.
In some possible embodiments, a first abutting surface is disposed on the upper flange, a second abutting surface is disposed on the lower flange, a groove is disposed on the second abutting surface, a protrusion matched with the groove is disposed on the first abutting surface, and the sealing groove is formed between the protrusion and the groove.
In some possible embodiments, a sealing gasket is provided at the junction of the upper flange and the outer inspection cover.
In some possible embodiments, a pressing plate is arranged below the lower flange, and the pressing plate is fixed on the outer bottom surface of the lower flange through the connecting piece, so that bulge deformation of the central part of the lower flange is avoided when the upper flange is connected with the lower flange.
In some possible embodiments, the seal testing device further comprises: the base, the seal test device passes through the outer cover that examines sets up on the base.
In a second aspect, an embodiment of the present invention provides a method for using a universal seal test apparatus, where the method includes:
step S1, a sealing element to be tested is installed in a sealing groove between an upper flange and a lower flange;
s2, the upper flange is respectively and fixedly connected with the lower flange and the outer detection cover through a connecting piece, and the moment of the connecting piece is loaded according to the specification of the sealing piece to be tested;
step S3, filling leakage detection medium into a first sealing space formed by the upper flange and the lower flange or a second sealing space formed among the upper flange, the lower flange and the outer detection cover according to the use condition of the sealing member to be tested; performing leakage detection on the first sealing space or the second sealing space to ensure that the leakage rate meets the requirement;
and S4, after the test is finished, disassembling the upper flange, the lower flange and the connecting piece on the outer detection cover, and checking the sealing piece to be tested.
In some possible embodiments, the step S2 specifically includes:
recording the value of the moment loaded on the connecting piece, repeatedly correcting the moment of the connecting piece according to a preset moment value, and actually measuring the gap of the butt joint surface between the upper flange and the lower flange and the gap of the butt joint surface between the lower flange and the outer inspection cover; the first sealed space and the second sealed space were subjected to a hydraulic test using distilled water.
In some possible embodiments, the step S3 specifically includes:
when the use condition of the sealing piece to be tested is internal pressure, placing the sealing experimental device at the test temperature, and vacuumizing the second sealing space through a straight-through joint positioned on the outer checking cover;
filling leakage detecting medium into the first sealing space through the through joint positioned on the upper flange, and connecting the through joint positioned on the outer detection cover to a helium mass spectrometer leakage detector or performing soap bubble leakage detection on the through joint after the first sealing space reaches a specified test pressure and maintains pressure for a preset time, so that the leakage rate is ensured to meet the requirement.
In some possible embodiments, the step S3 specifically includes:
when the use condition of the sealing piece to be tested is external pressure, placing the sealing experimental device at the test temperature, and vacuumizing the first sealing space through a straight-through joint positioned on the upper flange;
filling leakage detecting medium into the second sealing space through the through joint positioned on the outer detecting cover, and connecting the through joint positioned on the upper flange to a helium mass spectrometer leakage detector or performing soap bubble leakage detection on the through joint after the second sealing space reaches specified test pressure and maintains pressure for preset time, so that the leakage rate meets the requirement.
The beneficial technical effects of the technical scheme are as follows:
the embodiment of the invention provides a general type sealing test device and a use method thereof, wherein the sealing test device comprises: the upper flange, the lower flange, the outer inspection cover and the connecting pieces are connected up and down through the connecting pieces to form a first sealing space; the upper flange is connected with the outer detection cover up and down through a connecting piece, and a second sealing space is formed among the upper flange, the lower flange and the outer detection cover; and a sealing groove is arranged on the butt joint surface of the upper flange and the lower flange, and a sealing piece to be tested is arranged in the sealing groove. According to the embodiment of the invention, the to-be-tested sealing elements with different specifications can be detected by replacing the specifications of the upper flange and the lower flange, so that the operation is simple, the cost is low, and the universality is high.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of the overall structure of a general seal test apparatus according to an embodiment of the present invention;
FIG. 2 is an enlarged view of a portion of FIG. 1 at C;
FIG. 3 is a flow chart of a method of using a universal seal testing apparatus according to an embodiment of the present invention.
Reference numerals illustrate:
1. an upper flange; 11. a first mating surface; 12. a protrusion; 2. a lower flange; 21. a second abutment surface; 22. a groove; 3. an outer inspection cover; 4. a connecting piece; 41. a bolt; 42. a flat pad; 43. a spring pad; 44. a nut; 5. sealing grooves; 6. a straight-through joint; 61. a ball joint; 62. a jacket nut; 63. a blocking cap; 7. a sealing gasket; 8. a pressing plate; 9. a base; 10. lifting lugs.
Detailed Description
Features and exemplary embodiments of various aspects of the invention are described in detail below. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the invention by showing examples of the invention. In the drawings and the following description, at least some well-known structures and techniques have not been shown in detail in order not to unnecessarily obscure the present invention; also, the dimensions of some of the structures may be exaggerated for clarity. Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.
Fig. 1 is a schematic overall structure of a general seal testing apparatus according to an embodiment of the present invention, and as shown in fig. 1, the seal testing apparatus includes: the upper flange 1, the lower flange 2, the outer inspection cover 3 and a plurality of connecting pieces 4, wherein the upper flange 1 and the lower flange 2 are connected up and down through the connecting pieces 4 to form a first sealing space A; the upper flange 1 is connected with the outer detection cover 3 up and down through a connecting piece 4, and a second sealing space B is formed among the upper flange 1, the lower flange 2 and the outer detection cover 3; a sealing groove 5 is arranged on the butt joint surface of the upper flange 1 and the lower flange 2, and a sealing piece to be tested is arranged in the sealing groove 5. Specifically, in the actual use process, according to the structural form of the sealing member to be tested, the corresponding upper flange 1 and lower flange 2 can be selected to meet the sealing experiment verification requirements of groove structural forms such as groove type and tongue-and-groove type, and in addition, the connecting member 4 can comprise a bolt 41, a flat pad 42, a spring pad 43 and a nut 44. According to the embodiment of the invention, the specifications of the upper flange 1 and the lower flange 2 can be replaced to detect the sealing pieces (such as the sealing structure and the sealing ring) to be tested with different specifications, so that the operation is simple, the cost is low, and the universality is high.
In the embodiment, at least two through joints 6 are arranged on an upper flange 1 positioned in a first sealing space A, and are respectively used for filling leakage detection medium into the first sealing space A and performing sealing detection on a sealing piece to be tested; at least two through joints 6 are arranged on the outer detection cover 3 and are respectively used for filling leakage detection medium into the second sealing space B and performing sealing detection on the sealing piece to be tested. Specifically, the through-joint 6 includes: the ball-type joint 61, the coat nut 62 and the blocking cap 63, the ball-type joint 61 is arranged at the top end inside the coat nut 62, and the blocking cap 63 is sleeved at the top end outside the coat nut 62. The through joints 6 are welded on the upper flange 1 and the outer detection cover 3 respectively, the number of the through joints 6 on the upper flange 1 and the outer detection cover 3 is at least two, one through joint 6 is used as an inflation port for filling leakage detection media, one through joint 6 is used as a detection port for detecting the leakage rate of the first sealing space A and the second sealing space B, and in order to ensure the reliability of the sealing test device, the welding seam between the through joint 6 and the upper flange 1 and the welding seam between the through joint and the through joint 6 and the through joint are subjected to 100% radial detection, the qualified grade is I, and welding defects such as air holes, inclusions and the like are not allowed to exist.
Fig. 2 is a partial enlarged view of C in fig. 1, and as shown in fig. 2, in addition, in this embodiment, a first abutting surface 11 is provided on the upper flange 1, a second abutting surface 21 is provided on the lower flange 2, a groove 22 is provided on the second abutting surface 21, a protrusion 12 matching with the groove 22 is provided on the first abutting surface 11, and a seal groove 5 is formed between the protrusion 12 and the groove 22. Specifically, at the sealing member to be tested to different specifications, can process out on first butt joint face 11 and second butt joint face 21 with the sealing groove 5 of the structure shape matching of sealing member to be tested for detect the sealing member to be tested of different specifications, easy operation, with low costs, and the commonality of this embodiment is strong.
As shown in fig. 1, in some embodiments, a sealing gasket 7 is provided at the junction of the upper flange 1 and the outer test cover 3. The sealing gasket 7 in this embodiment can be processed according to the experiment needs, selects fluororubber board or silastic board to form, and sealing gasket 7 can guarantee the leakproofness of flange 1 and outer cover 3 of examining, if wait that the sealed emergence of experimental sealing member is revealed, helium or nitrogen gas etc. that reveal all are in the outer cover 3 of examining, can protect experiment operating personnel, avoid appearing breathing danger emergence such as unsmooth.
As shown in fig. 1, in some embodiments, a pressing plate 8 is disposed below the lower flange 2, and the pressing plate 8 is fixed on the lower flange 2 through a connecting piece 4 to be an outer bottom surface, so as to avoid bulging deformation of a central portion of the lower flange 2 when the upper flange 1 is connected with the lower flange 2. Specifically, when the rigidity of the lower flange 2 is poor, the bulge deformation of the central part of the lower flange 2 caused by the large edge moment can be avoided when the moment is applied to the connecting piece 4.
As shown in fig. 1, in some embodiments, the seal testing apparatus may further comprise: the base 9, the seal test device is set up on the base 9 through the outer cover 3. Specifically, if the base 9 is not provided during the test, the worker easily breaks his feet or presses his hands during the handling and transferring process each time, and the overall height is too low, which is inconvenient to operate. For ease of handling, a universal base 9 is provided in this embodiment, and a seal test device is placed on the base 9 each time a test is performed. In addition, in order to facilitate the lifting, a lifting lug 10 is also provided in this embodiment.
The universal sealing test device provided by the embodiment of the invention can finish high-low temperature sealing test verification within the range of-250 ℃ to 500 ℃ according to the use working condition of the sealing element to be tested. Especially when the use condition of the sealing member to be tested is a low-temperature environment, the tightness of the straight-through joint 6 needs to be detected at the test temperature slightly lower than the use condition, so that the leak rate requirement of each connecting part of the straight-through joint 6 at the test temperature is strictly ensured to be not more than 1 multiplied by 10 -7 Pa·m 3 /s。
FIG. 3 is a flowchart of a method for using a universal seal test apparatus according to an embodiment of the invention, as shown in FIG. 2, the method comprising the steps of:
step S1, a sealing element to be tested is installed in a sealing groove 5 between an upper flange 1 and a lower flange 2;
s2, fastening and connecting the upper flange 1 with the lower flange 2 and the outer detection cover 3 through the connecting piece 4 respectively, and loading the moment of the connecting piece 4 according to the specification of the sealing piece to be tested;
step S3, filling leakage detection medium into a first sealing space A formed by the upper flange 1 and the lower flange 2 or a second sealing space B formed by the upper flange 1, the lower flange 2 and the outer detection cover 3 according to the use condition of the sealing member to be tested; performing leakage detection on the first sealing space A or the second sealing space B to ensure that the leakage rate meets the requirement;
and S4, after the test is finished, disassembling the upper flange 1, the lower flange 2 and the connecting piece 4 on the outer detection cover 3, and checking the sealing piece to be tested.
Specifically, after the sealing element to be tested is installed in the sealing groove 5 between the upper flange 1 and the lower flange 2, the butt joint surface of the upper flange 1 and the lower flange 2 is fixedly connected through the connecting element 4, and then the butt joint surface of the upper flange 1 and the outer inspection cover 3 is fixedly connected through the other connecting element 4.
During the connection, the gap between the first abutment surface 11 of the upper flange 1 and the second abutment surface of the lower flange 2 is kept substantially the same, i.e. the gap between the various parts of the flange surfaces where the upper flange 1 and the lower flange 2 are in contact is substantially the same. Bolts 41 are inserted into the upper flange 1 and the lower flange 2, flat pads 42, elastic pads 43 and nuts 44 are arranged, the bolts are uniformly and symmetrically screwed in the circumferential direction, and gaps at all positions in the circumferential direction of the butt joint surfaces of the upper flange 1 and the lower flange 2 are kept consistent when measured by using a feeler gauge. Confirm that all bolts 41 have been screwed up, load the moment according to the specification of the seal to be tested, and record the loading moment value on bolt 41 and nut 44, after the moment finishes loading for the first time, stress release after a period of time, will release a part of oneself, lead to the moment to diminish, so need to correct, namely correct the moment of the connecting piece 4 repeatedly according to the preset moment value, the number of times of correction can be according to the actual conditions, correct three times in this embodiment, and the clearance of the butt joint face between upper flange 1 and lower flange 2 is measured.
After a certain period of time (for example 8 hours), the circumferential direction of the abutment surface of the upper flange 1 and the lower flange 2 is corrected with the recorded final torque until the nut 44 is no longer rotated. In addition, because the leakage generated by the failure of the sealing element has a process, for example, distilled water can be adopted to carry out a hydraulic test on the sealing element after 15 minutes of the state of pressure, if the gap is unchanged after the hydraulic test, the applied moment is considered reasonable, the flatness is qualified, the strength and the rigidity of the sealing surface are judged to be enough, and the leakage rate is considered to be qualified and the sealing is effective.
Similarly, the method used in connecting the upper flange 1 and the outer cover 3 is the same as the method used in connecting the upper flange 1 and the lower flange 2, and will not be described here.
In this embodiment, when the working condition of the seal to be tested is internal pressure, the seal test device is placed at the test temperature, and the first sealed space a is vacuumized through the through joint 6 located on the upper flange 1; filling leakage detecting medium into the first sealing space A through the through joint 6 positioned on the upper flange 1, and connecting the through joint 6 positioned on the outer detection cover 3 to a helium mass spectrometer leak detector or performing soap bubble leak detection on the through joint 6 after the first sealing space A reaches a specified test pressure and maintains pressure for a preset time, so that the leak rate is ensured to meet the requirement.
Specifically, when the working condition of the sealing member to be tested is internal pressure, the sealing test device is placed at test temperature, a leakage detecting medium (under high temperature and normal temperature working conditions, the leakage detecting medium is preferably air, nitrogen and helium, and under low temperature working conditions, the leakage detecting medium is preferably nitrogen and helium) is filled into the first sealing space A of the sealing test tool through the through joint 6 positioned on the upper flange 1, a cavity (namely the second sealing space B) between the outer detection cover 3 and the upper flange 1 and the lower flange 2 is a vacuum environment, the pressure is slowly increased according to a graded loading principle, the pressure is maintained for 15 minutes after the specified test pressure is reached, and the through joint 6 positioned on the outer detection cover 3 is connected to a helium mass spectrometer leakage detector or is subjected to soap bubble leakage detection at the position, so that the leakage rate meets the requirement.
When the use condition of the sealing piece to be tested is external pressure, the sealing experimental device is placed at the test temperature, the second sealing space B is vacuumized through the through joint 6 positioned on the outer detection cover 3, then the leak detection medium is filled into the second sealing space B, and after the second sealing space A reaches the specified test pressure and maintains the pressure for a preset time according to the principle of graded loading moment, the through joint 6 positioned on the upper flange 1 is connected to a mass spectrum leak detector or the through joint 6 is subjected to soap bubble leak detection, so that the leak rate meets the requirements.
Specifically, when the working condition of the sealing member 19 to be tested is external pressure, the sealing experimental device provided by the embodiment of the invention is placed at the test temperature, a leakage detecting medium (air, nitrogen and helium are preferred under high-temperature and normal-temperature working conditions, and nitrogen and helium are preferred under low-temperature working conditions) is filled into the sealing test tool through the through joint 6 positioned on the outer test cover 3, a cavity (a first sealing space) between the upper flange 1 and the lower flange 2 is a vacuum environment, the pressure is slowly increased according to the principle of graded loading, and the pressure is maintained for 15 minutes after the specified test pressure is reached, and the through joint 6 positioned on the upper flange 1 is connected to a mass spectrum leak detector or is used for soap bubble leak detection at the position, so that the leakage rate is ensured to meet the requirements.
In this embodiment, the usage condition refers to what occasion the seal to be tested is used when the seal to be tested is formally used, for example, "the usage condition is internal pressure" represents that the seal to be tested is used for structural sealing with pressure inside, and likewise, when the usage condition is external pressure, the seal to be tested is used for structural sealing without pressure inside.
After the test is finished, unloading the pressure, decomposing the test piece, checking whether the to-be-tested sealing piece has damage, scratches and the like, and ensuring the leak rate to be not more than 1 multiplied by 10 when the to-be-tested sealing piece is a metal material sealing ring under the medium and the pressure -6 Pa·m 3 S; when the sealing piece to be tested is a rubber sealing ring, the leak rate is ensured to be not more than 1 multiplied by 10 -5 Pa·m 3 /s。
The application method of the universal sealing test device provided by the embodiment of the invention can realize the sealing test verification of sealing elements with different specifications only by replacing the upper flange 1 and the lower flange 2, and has the advantages of simple operation, low cost and strong universality.
In the description of the embodiments of the present invention, it should be noted that the orientation or positional relationship indicated by "upper, lower, inner and outer", etc. in terms are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of describing the present invention and simplifying the description, rather than indicating or suggesting that the device or element in question must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first, second, or third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
The terms "mounted, connected, and coupled" in embodiments of the invention are to be construed broadly, unless otherwise specifically indicated and defined, for example: can be fixed connection, detachable connection or integral connection; it may also be a mechanical connection, an electrical connection, or a direct connection, or may be indirectly connected through an intermediate medium, or may be a communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
While the invention has been described with reference to a preferred embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In particular, the technical features mentioned in the respective embodiments may be combined in any manner as long as there is no structural conflict. The present invention is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions falling within the scope of the claims.
Claims (10)
1. A universal seal testing device, the seal testing device comprising: the device comprises an upper flange (1), a lower flange (2), an outer detection cover (3) and a plurality of connecting pieces (4), wherein the upper flange (1) and the lower flange (2) are connected up and down through the connecting pieces (4) to form a first sealing space (A);
the upper flange (1) is connected with the outer detection cover (3) up and down through the connecting piece (4), and a second sealing space (B) is formed among the upper flange (1), the lower flange (2) and the outer detection cover (3);
a sealing groove (5) is formed in the butt joint surface of the upper flange (1) and the lower flange (2), and a sealing piece to be tested is arranged in the sealing groove (5).
2. A universal sealing test device according to claim 1, characterized in that at least two through-connections (6) are provided on the upper flange (1) at the first sealing space (a) for filling the first sealing space (a) with a leakage detecting medium and for sealing the seal to be tested;
at least two straight-through connectors (6) are arranged on the outer detection cover (3) and are respectively used for filling leakage detection media into the second sealing space (B) and carrying out sealing detection on the sealing piece to be tested.
3. The universal sealing test device according to claim 1, wherein a first butt joint surface (11) is arranged on the upper flange (1), a second butt joint surface (21) is arranged on the lower flange (2), a groove (22) is arranged on the second butt joint surface (21), a protrusion (12) matched with the groove (22) is arranged on the first butt joint surface (11), and the sealing groove (5) is formed between the protrusion (12) and the groove (22).
4. A universal sealing test device according to claim 1, characterized in that a sealing gasket (7) is arranged at the junction of the upper flange (1) and the outer test cover (3).
5. A universal sealing test device according to claim 1, characterized in that a pressure plate (8) is arranged below the lower flange (2), said pressure plate (8) being fixed to the outer bottom surface of the lower flange (2) by means of the connecting piece (4).
6. The universal seal testing apparatus of claim 1, further comprising: and the sealing test device is arranged on the base (9) through the outer detection cover (3).
7. The application method of the universal type sealing test device is characterized by comprising the following steps of:
step S1, a sealing element to be tested is installed in a sealing groove (5) between an upper flange (1) and a lower flange (2);
s2, fastening the upper flange (1) with the lower flange (2) and the outer inspection cover (3) respectively through a connecting piece (4), and loading the moment of the connecting piece (4) according to the specification of the sealing piece to be tested;
s3, filling leakage detection media into a first sealing space (A) formed by the upper flange (1) and the lower flange (2) or a second sealing space (B) formed among the upper flange (1), the lower flange (2) and the outer detection cover (3) according to the use condition of the sealing piece to be tested; performing liquid leakage detection on the first sealing space (A) or the second sealing space (B) to ensure that the leakage rate meets the requirement;
and S4, after the test is finished, disassembling the upper flange (1), the lower flange (2) and the connecting piece (4) on the outer detection cover (3), and checking the sealing piece to be tested.
8. The method of using a universal seal testing apparatus according to claim 7, wherein the step S2 specifically comprises:
recording the value of the moment loaded on the connecting piece (4), repeatedly correcting the moment of the connecting piece (4) according to a preset moment value, and actually measuring the gap of the butt joint surface between the upper flange (1) and the lower flange (2) and the gap of the butt joint surface between the lower flange (2) and the outer inspection cover (3); the first sealed space (a) and the second sealed space (B) were subjected to a hydraulic test using distilled water.
9. The method of using a universal seal testing apparatus according to claim 7, wherein the step S3 specifically comprises:
when the use condition of the sealing piece to be tested is the internal pressure, placing the sealing experimental device at the test temperature, and vacuumizing the second sealing space (B) through a straight-through joint (6) positioned on the outer detection cover (3);
filling leakage detection medium into the first sealing space (A) through the through joint (6) positioned on the upper flange (1), and connecting the through joint (6) positioned on the outer detection cover (3) to a helium mass spectrum leak detector or performing soap bubble leak detection on the through joint (6) after the first sealing space (A) reaches a specified test pressure and maintains the pressure for a preset time, so that the leakage rate meets the requirement.
10. The method of using a universal seal testing apparatus according to claim 7, wherein the step S3 specifically comprises:
when the use condition of the sealing piece to be tested is external pressure, the sealing experimental device is placed at the test temperature, and the first sealing space (A) is vacuumized through the through joint (6) positioned on the upper flange (1);
filling leakage detection medium into the second sealing space (B) through the through joint (6) positioned on the outer detection cover (3), and connecting the through joint (6) positioned on the upper flange (1) to a helium mass spectrum leak detector or performing soap bubble leak detection on the through joint (6) after the second sealing space (B) reaches a specified test pressure and maintains the pressure for a preset time, so that the leakage rate meets the requirement.
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| JP2000055769A (en) * | 1998-08-03 | 2000-02-25 | Shimadzu Corp | Leakage-testing device |
| CN202305137U (en) * | 2011-09-22 | 2012-07-04 | 航天材料及工艺研究所 | Simple high-temperature test device for flange rubber sealing element |
| CN204177532U (en) * | 2014-11-18 | 2015-02-25 | 贵州精立航太科技有限公司 | A kind of closed type self-locking nut component sealing test unit |
| CN106959194A (en) * | 2017-05-26 | 2017-07-18 | 中国特种设备检测研究院 | Leakage monitoring method for bolted flange joints |
| CN109282944A (en) * | 2018-10-29 | 2019-01-29 | 航天材料及工艺研究所 | A kind of ultra-low temperature surroundings composite seal sealing reliability verification method |
| CN115435983A (en) * | 2022-08-29 | 2022-12-06 | 南京工业大学 | External pressure type sealing performance test device |
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2023
- 2023-09-25 CN CN202311242284.0A patent/CN117419857A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000055769A (en) * | 1998-08-03 | 2000-02-25 | Shimadzu Corp | Leakage-testing device |
| CN202305137U (en) * | 2011-09-22 | 2012-07-04 | 航天材料及工艺研究所 | Simple high-temperature test device for flange rubber sealing element |
| CN204177532U (en) * | 2014-11-18 | 2015-02-25 | 贵州精立航太科技有限公司 | A kind of closed type self-locking nut component sealing test unit |
| CN106959194A (en) * | 2017-05-26 | 2017-07-18 | 中国特种设备检测研究院 | Leakage monitoring method for bolted flange joints |
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