CN110173502B - Butterfly-shaped indicating gasket for testing moment of marine flange fastener - Google Patents
Butterfly-shaped indicating gasket for testing moment of marine flange fastener Download PDFInfo
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- CN110173502B CN110173502B CN201910298892.0A CN201910298892A CN110173502B CN 110173502 B CN110173502 B CN 110173502B CN 201910298892 A CN201910298892 A CN 201910298892A CN 110173502 B CN110173502 B CN 110173502B
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- 238000012360 testing method Methods 0.000 title claims description 14
- 210000004907 gland Anatomy 0.000 claims abstract description 30
- 230000003014 reinforcing effect Effects 0.000 claims description 11
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 3
- 229910000639 Spring steel Inorganic materials 0.000 claims description 3
- 229910052799 carbon Inorganic materials 0.000 claims description 3
- 239000003351 stiffener Substances 0.000 claims 1
- 238000007689 inspection Methods 0.000 abstract description 8
- 238000000034 method Methods 0.000 abstract description 6
- 238000010276 construction Methods 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 description 5
- 230000001066 destructive effect Effects 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 238000012856 packing Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012795 verification Methods 0.000 description 2
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 210000001550 testis Anatomy 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- 238000011179 visual inspection Methods 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B43/00—Washers or equivalent devices; Other devices for supporting bolt-heads or nuts
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Flanged Joints, Insulating Joints, And Other Joints (AREA)
Abstract
The invention discloses a butterfly-shaped indicating gasket for detecting the torque of a marine flange fastener, which comprises a butterfly-shaped gasket and an indicating ring arranged on the butterfly-shaped gasket, wherein the butterfly-shaped gasket comprises a gasket main body, a butterfly-shaped gland and an indicating structure, a fixing hole is formed in the center of the gasket main body, the butterfly-shaped gland extends from the lower part of the gasket main body along the circumferential direction, the indicating structure extends from the end part of the butterfly-shaped gland along the circumferential direction, and an annular groove used for clamping the indicating ring is formed in the indicating structure. According to the invention, the indication ring is arranged on the butterfly washer, so that the fastening torque of the flange fastener can be rapidly and visually detected, the field construction efficiency is improved, the later inspection operation process is also omitted, and the inspection efficiency of a pipeline system is improved.
Description
Technical Field
The invention relates to the technical field of ship construction, in particular to a butterfly-shaped indicating gasket for testing the torque of a marine flange fastener.
Background
The pipelines in the pipeline system of the ship are usually connected and installed by using flanges, and after bolts and nuts are installed on the flanges and fastened according to the corresponding design requirements of pressure, temperature, medium and the like of the pipeline system (according to the drift diameter of the flange for the ship, the used screw diameter is M27-M56 mm), in order to prevent the leakage phenomenon at the flange connection part, the fastening torque of the bolts and the nuts needs to be checked, and the fastening torque of a fastening piece generally reaches 70% -100% N.M of the rated torque.
The conventional method is to use a torque indicating wrench to check the fastening torque of the fasteners so as to indicate that each pair of threaded fasteners achieves the same and rated torque and ensure the normal use of the pipeline flange (the main purpose is to prevent the flange connection from leaking). The torque test is generally carried out after the pipe system connection is completed.
Because the pipe fittings in the pipeline system are densely arranged, the operation space is limited, and after the pipeline system is connected, the torque inspection is very inconvenient by adopting the traditional torque indicating wrench. After the pipeline flanges are connected in different construction stages and working conditions, although a bolt and nut secondary fastening method can be adopted for verification, various inconveniences (poor secondary fastening working condition and easy 'virtual fastening' phenomenon after fastening) still exist depending on manual operation in practice, and the inspection effect is finally influenced.
The factors influencing the inspection effect mainly include the following:
1. the construction space is limited, and each pair of flanges cannot be inspected one by one after the pipeline systems are connected;
2. different torque indication methods (torque indication wrenches, bolt and nut secondary fastening and the like) of threaded fasteners are needed in different construction stages and under different working conditions, the technical requirements on operators are high, and a uniform and intuitive torque state judgment method is lacked;
3. the pipeline flange installation is carried out by different constructors, and lacks effective, audio-visual inspection means in the fastener installation, leads to the threaded fastener to install the back and can't reach the moment requirement.
Disclosure of Invention
Accordingly, the present invention is directed to a butterfly indicating washer for testing torque of a marine flange fastener that solves the above-mentioned problems of the prior art.
A butterfly-shaped indicating gasket for testing the torque of a fastening piece of a marine flange comprises a butterfly-shaped gasket and an indicating ring arranged on the butterfly-shaped gasket,
the butterfly gasket comprises a gasket main body, a butterfly gland and an indicating structure, wherein a fixing hole is formed in the center of the gasket main body, the butterfly gland extends from the lower portion of the gasket main body in the circumferential direction, the butterfly gland is arranged in a downward inclined mode, the indicating structure extends from the end portion of the butterfly gland in the circumferential direction, and an annular groove used for clamping an indicating ring is formed in the indicating structure.
Preferably, the thickness of the butterfly-shaped gland is smaller than that of the indicating structure, a plurality of reinforcing ribs which are uniformly distributed are radially arranged in the circumferential direction of the butterfly-shaped gland, and the tops of the reinforcing ribs are flush with the upper end face of the indicating structure.
Preferably, the maximum arc length G between two adjacent ribs is 2-4 times the thickness of the gasket body.
Preferably, the longitudinal section of the reinforcing rib is semicircular.
Preferably, the thickness of the butterfly gland is 1/2-2/3 of the thickness of the gasket main body, and the thickness of the indicating structure is equal to the thickness of the gasket main body.
Preferably, the inclination angle of the butterfly gland is 15-25 degrees.
Preferably, the longitudinal section of the annular groove is arc-shaped.
Preferably, the indicating ring is a ring structure made of carbon spring steel.
The invention has the beneficial effects that:
1. the butterfly indicating washer is simple in structure and convenient to use, through set up the indicating ring on the butterfly washer, whether the fastening torque of judging marine flange threaded fastener through the fracture of indicating ring has reached the designing requirement, the problem of pipeline system flange installation back under different stages, operating mode, can't be fast, the problem of detecting the fastening torque of flange fastener directly perceivedly has been solved, the site operation efficiency has been promoted, later stage inspection operation flow has also been saved, improve pipeline system inspection efficiency. And the broken indicating ring is reserved as a sample for reservation, so that the follow-up detection work can be conveniently carried out.
2. The butterfly-shaped indicating washer is manufactured in a stamping mode, is convenient for standardized batch quick manufacturing, is low in manufacturing cost, is simple and convenient to use, and is suitable for workers with different operation levels.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a half-sectional view of the butterfly washer of the invention.
Fig. 2 is an enlarged view of a portion a in fig. 1.
Fig. 3 is a top view of the butterfly washer of the invention.
Fig. 4 is a sectional view taken along line a-a in fig. 3.
Fig. 5 is a sectional view taken along line B-B in fig. 3.
Fig. 6 is a front view of the indicator ring.
Fig. 7 is a longitudinal sectional view of the indicating ring.
Fig. 8 is a view showing a state in which butterfly indicating washers and bolts are fixed to the flange.
Fig. 9 is an adjustment state diagram of butterfly indicator washer and bolt centering and adjustment.
Fig. 10 is a diagram of the detection state when the tightening torque is 30% N.M of the rated torque of the fastener.
Fig. 11 is a diagram of the detection state when the tightening torque is 70% N.M of the rated torque of the fastener.
Fig. 12 is a state diagram for testing when the tightening torque is N.M at 85% (± 5%) of the rated torque of the fastener.
Fig. 13 is an enlarged view of a portion B in fig. 12.
FIG. 14 is a schematic diagram showing the ring broken and then broken off.
The reference numerals in the figures have the meaning:
1 is the butterfly packing ring, 2 is the indicating ring, and 3 are the packing ring main part, and 4 are the butterfly gland, and 5 are the instruction structure, and 6 are the fixed orifices, and 7 are the annular groove, and 8 are the strengthening rib, and 9 are the bolt, and 10 are marine flange, and 11 are butterfly instruction packing ring.
Detailed Description
For better understanding of the technical solutions of the present invention, the following detailed descriptions of the embodiments of the present invention are provided with reference to the accompanying drawings.
It should be understood that the described embodiments are only some embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The present application is described in further detail below with reference to specific embodiments and with reference to the attached drawings.
In the description of the present application, unless explicitly stated or limited otherwise, the terms "first", "second", and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more unless specified or indicated otherwise; the terms "connected," "fixed," and the like are to be construed broadly and may, for example, be fixedly connected, detachably connected, integrally connected, or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the description of the present application, it should be understood that the terms "upper", "lower", "left", "right", and the like used in the embodiments of the present application are described with reference to the angles shown in the drawings, and should not be construed as limiting the embodiments of the present application. In addition, in this context, it will also be understood that when an element is referred to as being "on" or "under" another element, it can be directly on "or" under "the other element or be indirectly on" or "under" the other element via an intermediate element.
The embodiment of the invention provides a butterfly-shaped indicating gasket for testing the fastening torque of a marine flange, which can visually, simply, conveniently and quickly detect whether the fastening torque of a pipeline system flange installed at different stages under different working conditions reaches 80-90% N.M of rated torque.
As shown in fig. 1 to 14, the butterfly-shaped indicating washer for testing the torque of the marine flange fastener comprises a butterfly-shaped washer 1 and an indicating ring 2, wherein the indicating ring 2 is arranged on the butterfly-shaped washer 1.
The butterfly gasket 1 comprises a gasket body 3, a butterfly gland 4 and an indicating structure 5.
The center of the gasket main body 3 is provided with a fixing hole 6.
The butterfly gland 4 extends from the lower part of the gasket main body 3 along the circumferential direction, the butterfly gland 4 is arranged in a downward inclined mode, and the inclined angle of the butterfly gland 4 ranges from 15 degrees to 25 degrees.
The indicating structure 5 extends from the end of the butterfly gland 4 along the circumferential direction, and an annular groove 7 for clamping the indicating ring 2 is formed in the indicating structure 5. The indicating ring 2 is a ring structure made of carbon spring steel, and the breaking moment of the indicating ring is N.M% to 90% of the rated moment of the fastener, namely, when the fastening moment of the fastener reaches N.M% to 90% of the rated moment of the fastener, the indicating ring on the butterfly washer is broken.
In this embodiment, the gasket body 3 of the butterfly gasket 1 is a plate-shaped structure with a circular fixing hole in the middle, and the outer diameter thereof
The diagonal size and the inner diameter of the bolt and the nut used on the marine flange are met
The diameter of the matched flange screw hole is met, and the thickness T1 meets the standard thickness of a class A flat gasket or a related flat gasket for ships specified in the GB/T97.1-2002 standard. The butterfly gland 4 is an extension part of the gasket main body 3, and the thickness of the butterfly gland 4 is 1/2-2/3 of the thickness of the gasket main body 3. The indicating structure 5 is an extension of the butterfly gland 4, the outer diameter of which
Meets the design requirements of class A flat washer or related flat washer for ships outer diameter specified in GB/T97.1-2002 standard, the thickness T3 of the indicating structure 5 is equal to the thickness T1 of the washer body 3, the longitudinal section of the annular groove 7 on the indicating structure 5 is arc-shaped, and the indicating ring 2 is fixed, and the diameter of the circular groove of the annular groove 7 is used for fixing the indicating ring 2
The same as the wire diameter of the indicator ring 2.
In this embodiment, the thickness of the butterfly-shaped gland 4 is smaller than that of the indication structure 5, a plurality of reinforcing ribs 8 which are uniformly distributed are radially arranged in the circumferential direction of the butterfly-shaped gland 4, and the maximum arc length G between two adjacent reinforcing ribs is 2-4 times of the thickness of the gasket main body 3. The top of the reinforcing rib 8 is flush with the upper end face of the indicating structure 5, the longitudinal section of the reinforcing rib 8 is semicircular, and the height T4 and the width of the reinforcing rib are equal.
For the convenience of field identification and use, the gasket body 3 of the butterfly gasket 1 can be further provided with an aperture mark and a moment mark.
The butterfly washer 1 can be made of the same material as the marine flange, such as carbon steel (45#, 40CrMo, Q235), stainless steel (3Cr13, 1Cr18Ni9Ti), copper (QSi-1), and the like. The butterfly washer 1 can be manufactured and molded integrally by punching and rolling, so that the butterfly washer can be produced in standardized batch at a high speed.
Before the butterfly-shaped indicating washer is used for detecting the fastening torque of the threaded fastener of the marine flange, the destructive torque of the indicating ring 2 needs to be tested, namely the destructive test of the indicating ring is carried out. The destructive test is carried out by assembling the indicating ring 2 on the butterfly washer 1, and the line diameter of the indicating ring 2 is continuously tested by the destructive test
Is adjusted so that the break torque of the indicator ring reaches N.M% of the rated torque of the fastener. Aiming at fasteners with different sizes (the screw diameter is M27-M56 mm), butterfly-shaped indicating washers matched with the fasteners need to be manufactured. When the indicating ring is used, the indicating ring 2 is assembled with the disc-shaped gasket 1 into a whole in a stamping mode to form the disc-shaped indicating gasket. Pitch diameter of the indicator ring 2
Matching the pitch diameter of the annular groove 7.
The method for detecting the fastening torque of the threaded fastener of the marine flange by using the butterfly-shaped indicating washer comprises the following specific steps:
step 1: selecting a butterfly-shaped indicating washer corresponding to the specification of the threaded fastener;
the threaded fastener comprises a bolt and a nut;
the butterfly-shaped indicating gasket is arranged on one side, with a wide view, of the flange according to the working conditions in the field.
Step 2: bolts 9 are inserted through flange holes of the marine flange 10, and butterfly-shaped indicating washers 11 are installed between the bolts 9 and the marine flange 10.
And step 3: the positions of the bolts 9 and the butterfly-shaped indicating washers 11 are adjusted, so that the screws of the bolts are positioned in the centers of the flange holes, namely, the bolts are centered, and the contact surfaces of the bolts and the butterfly-shaped indicating washers are smooth.
And 4, step 4: the nut (not shown in the figure) is installed on the bolt, the nut is screwed, the fracture condition of the indicating ring 2 is observed while the nut is screwed (an operator can judge whether the indicating ring is fractured or not through hand feeling and fracture sound), when the indicating ring 2 is fractured, the screwing action is stopped, and the fastening torque of the fastening piece reaches N.M% of the rated torque of the fastening piece at the moment.
And 5: after the flange fasteners are fully tightened, the operator must immediately check and confirm whether the indicator ring 2 has come off the butterfly washer 1 (visual indication).
Step 6: when the pipeline system is inspected, whether the fastening torque of the fastening piece on the flange meets the specified requirements can be judged only by observing the butterfly-shaped indicating washer 11 by naked eyes, the conventional means (torque wrench and secondary fastening) is not required to be adopted for verification one by one, and the inspection process is greatly simplified.
The butterfly indicating washer is simple in structure and convenient to use, and the indicating ring is arranged on the butterfly washer, so that whether the fastening torque of the marine flange threaded fastener reaches the design requirement or not is judged by the breakage of the indicating ring, and the problem that the fastening torque of the flange fastener cannot be detected quickly and intuitively after the pipeline system flange is installed under different stages and working conditions is solved.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (7)
1. A butterfly-shaped indicating gasket for testing the torque of a marine flange fastener is characterized by comprising a butterfly-shaped gasket (1) and an indicating ring (2) arranged on the butterfly-shaped gasket (1),
the butterfly gasket (1) is integrally manufactured and molded, the butterfly gasket (1) comprises a gasket main body (3), a butterfly gland (4) and an indicating structure (5), a fixing hole (6) is formed in the center of the gasket main body (3), the butterfly gland (4) extends from the lower portion of the gasket main body (3) along the circumferential direction, the butterfly gland (4) is arranged in a downward inclined mode, the indicating structure (5) extends from the end portion of the butterfly gland (4) along the circumferential direction, and an annular groove (7) used for clamping the indicating ring (2) is formed in the indicating structure (5);
the indicating ring (2) is of an annular structure made of carbon spring steel, the breaking moment of the indicating ring (2) is N.M% of the rated moment of the fastener, and the indicating ring can break when the fastening moment of the fastener reaches N.M% of the rated moment of the fastener, wherein the rated moment of the fastener is 80% to 90%.
2. Butterfly indicating washer for verifying torque of a marine flange fastener according to claim 1, characterized in that the thickness of the butterfly gland (4) is smaller than the thickness of the indicating structure (5), and a plurality of evenly distributed reinforcing ribs (8) are radially arranged in the circumferential direction of the butterfly gland (4), and the tops of the reinforcing ribs (8) are flush with the upper end face of the indicating structure (5).
3. Butterfly indicating washer for testing the torque of a marine flange fastener according to claim 2, characterized in that the maximum arc length G between two adjacent stiffeners is 2-4 times the thickness of the washer body (3).
4. Butterfly indicator washer for testing the torque of a marine flange fastener according to claim 2 or 3, characterized in that the longitudinal section of the reinforcing bars (8) is semicircular.
5. The butterfly indicating washer for verifying torque of a marine flange fastener according to claim 2, characterized in that the butterfly gland (4) has a thickness 1/2-2/3 of the thickness of the washer body (3), and the indicating structure (5) has a thickness equal to the thickness of the washer body (3).
6. Butterfly indicator washer for verifying the torque of a marine flange fastener according to claim 1, characterized in that the angle of inclination of the butterfly gland (4) is 15 ° -25 °.
7. Butterfly indicating washer for verifying the torque of a marine flange fastener according to claim 1, characterized in that the longitudinal section of the annular groove (7) is arc-shaped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910298892.0A CN110173502B (en) | 2019-04-15 | 2019-04-15 | Butterfly-shaped indicating gasket for testing moment of marine flange fastener |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910298892.0A CN110173502B (en) | 2019-04-15 | 2019-04-15 | Butterfly-shaped indicating gasket for testing moment of marine flange fastener |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110173502A CN110173502A (en) | 2019-08-27 |
| CN110173502B true CN110173502B (en) | 2021-09-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910298892.0A Active CN110173502B (en) | 2019-04-15 | 2019-04-15 | Butterfly-shaped indicating gasket for testing moment of marine flange fastener |
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| Country | Link |
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| CN (1) | CN110173502B (en) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3978761A (en) * | 1975-06-26 | 1976-09-07 | Thomas & Betts Corporation | Fastener assembly |
| US7125213B2 (en) * | 2001-12-06 | 2006-10-24 | Junkers John K | Washer, fastener provided with a washer, method of and power tool for fastening objects |
| US20080138167A1 (en) * | 2006-12-12 | 2008-06-12 | Ivan Wayne Wallace | Direct Tension Indicating Washers |
| DE102010043170B3 (en) * | 2010-10-29 | 2012-04-12 | Hilti Aktiengesellschaft | Sensor arrangement, for example on an anchor bolt |
| EP3150865B1 (en) * | 2015-10-01 | 2017-09-13 | Thomas Volborth | Bolt anchored by impact |
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2019
- 2019-04-15 CN CN201910298892.0A patent/CN110173502B/en active Active
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| CN110173502A (en) | 2019-08-27 |
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