CN114166451A - Impact test method and device for U-shaped rod type anti-throwing piece of large-scale component - Google Patents
Impact test method and device for U-shaped rod type anti-throwing piece of large-scale component Download PDFInfo
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- CN114166451A CN114166451A CN202111411532.0A CN202111411532A CN114166451A CN 114166451 A CN114166451 A CN 114166451A CN 202111411532 A CN202111411532 A CN 202111411532A CN 114166451 A CN114166451 A CN 114166451A
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- 238000009863 impact test Methods 0.000 title claims abstract description 23
- 238000012360 testing method Methods 0.000 claims abstract description 11
- 238000009434 installation Methods 0.000 claims abstract description 10
- 238000000034 method Methods 0.000 abstract description 12
- 229910000831 Steel Inorganic materials 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000013507 mapping Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 210000005069 ears Anatomy 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 238000005381 potential energy Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
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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
- G01M7/00—Vibration-testing of structures; Shock-testing of structures
- G01M7/08—Shock-testing
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Abstract
The invention provides a method and a device for testing impact of a U-shaped rod type anti-throwing piece applied to a large-scale component. The invention comprises the following steps: the device comprises a fixed platform, a loading frame, a slideway support, a slideway, a truss car, an electromagnetic chuck, a drop hammer, a force-bearing square box, a mounting lug, a U-shaped rod type anti-throwing piece and a high-speed camera; the loading frame is vertically arranged on the fixed platform; the slide way bracket is arranged on the loading frame, and a vertical guide slide way is arranged on the slide way and is arranged on the slide way bracket; the two bearing square boxes are arranged on the fixed platforms on the two sides of the slide way, and are respectively provided with an installation lug, and the two installation lugs are symmetrical in position; the U-shaped rod type anti-throwing piece is provided with a fixed mark and is arranged on the mounting lug; the truss vehicle is located above the loading frame, the electromagnetic chuck is hoisted below the truss vehicle, and the electromagnetic chuck sucks up the drop hammer after being electrified. The invention carries out impact test on the U-shaped rod type anti-throwing piece to the maximum extent close to the real impact state; high accuracy, large impact energy and convenient energy adjustment.
Description
Technical Field
The invention belongs to the field of impact tests, and particularly relates to a method and a device for an impact test of a U-shaped rod type anti-throwing piece applied to a large-scale component.
Background
The accidents caused by burst of the high-energy steam pipeline of the large-scale component are fatal, the sudden burst generates strong impact force to threaten the operation safety of the nuclear island, a U-shaped restraint assembly is generally required to be arranged on the pressure pipeline of the large-scale component, and the U-shaped restraint assembly is formed by bending a bundle of high-strength rod-type round steel into a U-shaped hoop and is fixed on a structural beam. The U-shaped rod type anti-throwing piece is used as an anti-throwing device of the pressure pipeline, when the pressure pipeline is broken, pipeline impact is borne, the U-shaped rod is subjected to plastic deformation, impact kinetic energy is absorbed, and equipment and a civil engineering structure are protected. The capability of the rod piece under the action of bearing impact power can be inspected through an impact test of the U-shaped rod type anti-throwing piece, and the dynamic performance of the anti-throwing limiting piece under the action of impact load is verified; meanwhile, for analyzing the energy absorption capacity and deformation characteristics of the U-shaped rod under dynamic impact load, the strain energy absorbed after the rod piece deforms is calculated, and the calculation result of relevant numerical values is verified, so that the impact test is indispensable.
The U-shaped rod type anti-throwing piece is special in form, an existing test method can not be used for reference, and the U-shaped rod type anti-throwing piece is not suitable for general impact test devices or equipment no matter the impact energy provided or the requirements of the installation form on the test piece.
Disclosure of Invention
The invention aims to provide a method and a device for testing the impact of a U-shaped rod type anti-throwing piece of a large-sized member, which have the advantages of large impact energy, less equipment investment, simplicity and convenience in operation, high accuracy and real impact state closeness.
The purpose of the invention is realized by the following technical scheme:
the impact test method and device for the U-shaped rod type anti-throwing piece of the large-scale component comprise the following steps: the device comprises a fixed platform, a loading frame, a slideway support, a slideway, a truss car, an electromagnetic chuck, a drop hammer, a force-bearing square box, a mounting lug, a U-shaped rod type anti-throwing piece and a high-speed camera; the loading frame is vertically arranged on the fixed platform; the slide way bracket is arranged on the loading frame, and a vertical guide slide way is arranged on the slide way and is arranged on the slide way bracket; the two bearing square boxes are arranged on the fixed platforms on the two sides of the slideway through foundation bolts, the two bearing square boxes are respectively provided with an installation lug, and the two installation lugs are symmetrical in position; the U-shaped rod type anti-throwing piece is provided with a fixed mark and is arranged on the mounting lug; the truss vehicle is positioned above the loading frame, the electromagnetic chuck is hoisted below the truss vehicle, the electromagnetic chuck sucks the drop hammer after being electrified, the drop hammer is hoisted above the slideway and adjusted to the required impact height, the electromagnetic chuck is powered off, and the drop hammer falls freely; the high-speed camera is fixed on the fixed platform.
Furthermore, the shape of the drop hammer is that the lower end of the drop hammer is a cylindrical surface, the upper part of the drop hammer is a plane, sliding grooves are formed in two sides of the drop hammer, and the sliding posture of the drop hammer can be guaranteed when the drop hammer slides downwards along the sliding way.
Furthermore, the U-shaped rod type anti-throwing piece is marked with fixed interval marks, after an impact test, all the sections of the U-shaped rod type anti-throwing piece are extended to different degrees, the marks of all the sections and the circumferential direction of all the sections and the distances among the marks are measured, the distances are compared with the distances before the test, and the extension amount is calculated.
The invention has the beneficial effects that:
the invention effectively solves the problem of impact test of the U-shaped rod type anti-throwing piece of the large-scale component; the impact test can be carried out on the U-shaped rod type anti-throwing piece in a state close to the real impact state to the maximum extent; the method has the characteristics of simplicity, convenience in operation, high accuracy, large impact energy, convenience in energy adjustment and the like. The method can also provide a method for relevant tests which are inconvenient to test on an impact tester and have large impact energy requirements.
Drawings
FIG. 1 is a schematic diagram of a method and a device for an impact test of a U-shaped rod type anti-throwing piece of a large-scale component;
FIG. 2 is a schematic view of a skid assembly;
FIG. 3 is a schematic view of a U-shaped bar type anti-whip member and mounting ears;
FIG. 4 is a schematic view of a mounting ear
FIG. 5 is a schematic view of a drop hammer impacting U-bar whipstock;
fig. 6 is a schematic view of the fixed indicia of the U-shaped bar whip.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
According to fig. 1 to 6, the impact test device for the U-shaped rod type anti-throwing piece of the large-scale component comprises: the device comprises a fixed platform 1, a loading frame 2, a slideway support 3, a slideway 4, a truss car 5, an electromagnetic chuck 6, a drop hammer 7, a force-bearing square box 8, a mounting lug 9, a U-shaped rod type anti-throwing piece 10 and a high-speed camera 11; the loading frame 2 is vertically arranged on the fixed platform 1; the slideway support 3 is arranged on the loading frame 2, and the slideway 4 is provided with a vertical guide slideway and is arranged on the slideway support 3; the two bearing square boxes 8 are arranged on the fixed platforms 1 at two sides of the slideway 4 through foundation bolts, the two bearing square boxes 8 are respectively provided with an installation lug 9, and the two installation lugs 9 are symmetrical in position; the U-shaped rod type anti-throwing piece 10 is provided with fixed interval marks 12 and is installed on the installation lug 9, and the marks and the mark intervals are mapped before testing in four opposite directions of the circumferential direction of the U-shaped rod type anti-throwing piece 10.
(ii) a The truss vehicle 5 is positioned above the loading frame 2, the electromagnetic chuck 6 is hoisted below the truss vehicle 5, the electromagnetic chuck 6 sucks the drop hammer 7 after being electrified, the drop hammer is hoisted above the slideway 4 and is adjusted to the required impact height, the electromagnetic chuck 6 is powered off, and the drop hammer 7 falls freely; the high-speed camera 11 is fixed on the fixed platform 1.
The large-scale member U-shaped rod type anti-throwing piece impact test adopts an electromagnetic control drop hammer type impact test method, the impact load is simulated by the free falling impact load of a drop hammer 7, the gravitational potential energy is converted into kinetic energy by utilizing the free falling body of the drop hammer 7 to provide impact energy, the drop hammer 7 impacts the U-shaped rod type anti-throwing piece 10, and the impact energy and the impact speed of the drop hammer are calculated according to the lifting height of the drop hammer 7; recording an impact process by using a high-speed camera 11, and calculating an impact speed change process of the drop hammer 7; the deformation and elongation of each section of the U-shaped rod type anti-throwing piece 10 after impact are measured by a method of fixing interval marks 12.
According to the figures 1 and 6, the deformation and elongation of each section after the U-shaped rod impact test are measured by a fixed interval mark 12 method, and before the test, the fixed interval mark 12 is made on the U-shaped rod type anti-throwing piece 10 by using pigment. The drop hammer 7 is electrified and adsorbed through the electromagnetic chuck 6 hung below the truss vehicle 5 and is hung to the designed lifting height, during the impact test, the electromagnetic chuck 6 is powered off and demagnetized, and the drop hammer 7 falls freely; the drop hammer 7 freely falls to impact the U-shaped rod type anti-throwing piece 10, and the drop hammer 7 slides downwards in the slideway 4 of the test device; the impact process is started to be ended and is recorded in the full range by a high-speed camera 11 fixed on the side surface of the U-shaped rod type anti-throwing piece 10; and (3) completing impact and storing data, hanging out the drop hammer, dismounting the U-shaped rod type anti-throwing piece, measuring the deformation elongation of each section of the U-shaped rod in four opposite directions along the circumferential direction of the U-shaped rod, carrying out full-rod surveying and mapping on the marks and the mark intervals, recording surveying and mapping data, comparing with the data before experiment, and calculating the elongation of each section and each direction.
The impact energy and the impact speed of the drop hammer 7 are calculated through the height lifted by the drop hammer 7, and the required mass and lifting height of the drop hammer 7 are calculated by the following physical formulas:
E＝m·g·H
in the formula: e is the design impact energy, m is the weight of the drop hammer, g is the gravity acceleration, H is the lifting height of the drop hammer, and v is the design impact speed.
The fixed platform 1, the loading frame 2 and the force bearing square box 8 are fixed on the platform 1 through high-strength foundation bolts, so that the impact rigidity is ensured, and the deformation is avoided during the test.
According to the figure 5, the drop hammer 7 is in the shape of a lower cylindrical surface and an upper plane, and in order to ensure that the impact test is as close to reality as possible, the diameter of the lower cylindrical surface is the same as that of the high-energy steam pipeline protected by the U-shaped rod type anti-throwing piece 10; the upper part of the drop hammer 7 is a plane which is convenient for the electromagnetic chuck 6 to adsorb, and the drop hammer 7 is manufactured into a split superposition type, so that the mass of the drop hammer can be conveniently adjusted according to the impact energy.
According to the figure 2, the slide 4 is based on two I-steel sectional materials and is fixed on the loading frame 2 through a slide support 3, a guide slide rail is arranged in the middle of each I-steel, sliding grooves are formed in two sides of the drop hammer, and the sliding posture of the drop hammer 7 can be guaranteed when the drop hammer slides downwards along the slide 4.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (3)
1. The impact test method and device for the U-shaped rod type anti-throwing piece of the large-scale component are characterized in that: the device comprises a fixed platform (1), a loading frame (2), a slideway support (3), a slideway (4), a truss vehicle (5), an electromagnetic chuck (6), a drop hammer (7), a force-bearing square box (8), a mounting lug (9), a U-shaped rod type anti-throwing piece (10) and a high-speed camera (11); the loading frame (2) is vertically arranged on the fixed platform (1); the slide way support (3) is arranged on the loading frame (2), and the slide way (4) is provided with a vertical guide slide way and is arranged on the slide way support (3); the two bearing square boxes (8) are arranged on the fixed platforms (1) on two sides of the slide way (4) through foundation bolts, the two bearing square boxes (8) are respectively provided with an installation lug (9), and the two installation lugs (9) are symmetrical in position; the U-shaped rod type anti-throwing piece (10) is provided with a fixed mark (12) and is arranged on the mounting lug (9); the truss vehicle (5) is positioned above the loading frame (2), the electromagnetic chuck (6) is hoisted below the truss vehicle (5), the electromagnetic chuck (6) sucks the drop hammer (7) after being electrified, the drop hammer is hoisted to the position above the slide way (4) and adjusted to the required impact height, the electromagnetic chuck (6) is powered off, and the drop hammer (7) falls freely; the high-speed camera (11) is fixed on the fixed platform (1).
2. The impact test method and device for the U-shaped rod type anti-throwing piece of the large-sized component according to claim 1 are characterized in that: the shape of the drop hammer (7) is a cylindrical surface at the lower end, a plane at the upper part and two sides of the drop hammer are provided with sliding grooves, and the sliding posture of the drop hammer (7) can be ensured when the drop hammer slides downwards along the sliding way (4).
3. The impact test method and device for the U-shaped rod type anti-throwing piece of the large-sized component according to claim 1 are characterized in that: the U-shaped rod type anti-throwing piece (10) is marked with fixed interval marks (12), after an impact test, all sections of the U-shaped rod type anti-throwing piece (10) are extended to different degrees, the marks of all sections and the circumferential direction of all sections and the distances among the marks are measured, the marks are compared with the marks before the test, and the extension amount is calculated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111411532.0A CN114166451A (en) | 2021-11-25 | 2021-11-25 | Impact test method and device for U-shaped rod type anti-throwing piece of large-scale component |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111411532.0A CN114166451A (en) | 2021-11-25 | 2021-11-25 | Impact test method and device for U-shaped rod type anti-throwing piece of large-scale component |
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| CN114166451A true CN114166451A (en) | 2022-03-11 |
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| CN202111411532.0A Pending CN114166451A (en) | 2021-11-25 | 2021-11-25 | Impact test method and device for U-shaped rod type anti-throwing piece of large-scale component |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008224632A (en) * | 2007-03-16 | 2008-09-25 | Jfe Steel Kk | Method for measuring impact absorption energy using dropping weight type impact testing machine, and dropping weight type impact testing machine |
| CN104990814A (en) * | 2015-06-23 | 2015-10-21 | 哈尔滨工程大学 | Impact test device and test method for nuclear power station U-shaped pole type anti-flinging piece |
-
2021
- 2021-11-25 CN CN202111411532.0A patent/CN114166451A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008224632A (en) * | 2007-03-16 | 2008-09-25 | Jfe Steel Kk | Method for measuring impact absorption energy using dropping weight type impact testing machine, and dropping weight type impact testing machine |
| CN104990814A (en) * | 2015-06-23 | 2015-10-21 | 哈尔滨工程大学 | Impact test device and test method for nuclear power station U-shaped pole type anti-flinging piece |
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