CN204027982U - Metal material plays the test unit of rust and stress relation - Google Patents
Metal material plays the test unit of rust and stress relation Download PDFInfo
- Publication number
- CN204027982U CN204027982U CN201420506737.6U CN201420506737U CN204027982U CN 204027982 U CN204027982 U CN 204027982U CN 201420506737 U CN201420506737 U CN 201420506737U CN 204027982 U CN204027982 U CN 204027982U
- Authority
- CN
- China
- Prior art keywords
- string
- metallic cord
- bolt
- test unit
- hole
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Abstract
The utility model discloses the test unit that a kind of metal material plays rust and stress relation, comprise metallic cord tensioning system, metallic cord tensioning system comprises frame, string bolt seat and plural number cover metallic cord assembly, and metallic cord assembly comprises metallic cord, string end set collar chord bolt; One end of string bolt seat fixed frame, string bolt seat comprises the taper hole that string bolt is installed, the axis of cone of string bolt is inserted described taper hole; The string hole that the other end of frame comprises, one end of metallic cord, through described string hole, is fixed on string end set collar, and the other end of metallic cord fastens in the axis of cone that fixes on string bolt.The utility model can carry out contrast test to many string wires simultaneously, test efficiency is high.
Description
[technical field]
The utility model relates to metal material and plays rust test, relates in particular to the test unit that a kind of metal material plays rust and stress relation.
[background technology]
The metal materials such as steel are widely used in civil engineering structure.Reinforcing bar in the common significantly acceleration of marine corrosion environmental activity steel construction, xoncrete structure or the corrosion of pre-stressing tendon, thereby the military service performance of serious deteriorated structure.Because engineering structure is born larger load simultaneously, load level merits attention on the impact of the generation of material corrosion and development.
Existing document relates to stress and the corrosive nature of corroding material under coupling, but achievement is limited to test platform and the means of qualitative discussion and shortage systematic study more.Especially, metal material plays rust and rarely has bibliographical information with the relevance research of stress level.
Determine that metal material plays rust and need to possess following two necessary conditions with the relation of stress: (1) metal material plays the recognition device of rust event; (2) determine the effective ways of metal material stress level.
Disclosed Chinese invention patent application on June 15th, 2011 " a kind of method for monitoring corrosion cracks of reinforced concrete and sensor " (publication number CN102095677A), disclosed Chinese invention patent application on November 27th, 2013 " reinforcing steel corrosion monitoring sensor of wide range based on fiber grating sensing technology " (publication number CN103411713A), disclosed Chinese invention patent application on November 9 " steel bar corrosion time predicting device " (publication number CN202033274U) in 2011, all can be used for the identification that reinforcing bar plays corrosion event, but these monitoring steel bar corrosion methods all need the routine test of specific indexes, data-switching and deduction indirectly, in practice, operation is easy not.
Application number is that 2014101518910 Chinese patent application discloses suggestion device and the reminding method that a kind of reinforcing bar plays rust and chlorine ion concentration ultimate limit state.The suggestion device that reinforcing bar plays rust and chlorine ion concentration ultimate limit state has comprised rust test specimen, shelf and test specimen tensioning device, and a described rust test specimen is string wire; String wire is tightened by shelf, and one end of string wire is fixed on one end of shelf, and the other end of string wire is fixed on the other end of shelf by test specimen tensioning device.Above-mentioned suggestion device is placed in corrosion environment, when string wire fracture, when shelf flicks, points out reinforcing bar to play rust, reach chlorine ion concentration ultimate limit state.This apparatus structure is simple, the generation that can point out in time reinforcing bar to play the events such as rust and chlorine ion concentration ultimate limit state, but it mainly pays close attention to the chlorine ion concentration threshold value that causes steel corrosion, and a set of shelf can only be tested a string wire, test efficiency is low; And string wire adopts spring balance to carry out stress comparison calibration, both inconvenient, also accurate not.
[summary of the invention]
The technical problems to be solved in the utility model is to provide a kind of test unit that once can play to the metal material that many metallic cords are tested, test efficiency is high rust and stress relation.
Another technical matters that will solve of the utility model is to provide the test unit that a kind of stress calibration is convenient, play accurately rust and stress relation for metal material.
In order to solve the problems of the technologies described above, the technical solution adopted in the utility model is, a kind of metal material plays the test unit of rust and stress relation, comprise metallic cord tensioning system, metallic cord tensioning system comprises frame, string bolt seat and plural number cover metallic cord assembly, and metallic cord assembly comprises metallic cord, string end set collar chord bolt; One end of string bolt seat fixed frame, string bolt seat comprises the taper hole that string bolt is installed, the axis of cone of string bolt is inserted described taper hole; The string hole that the other end of frame comprises, one end of metallic cord, through described string hole, is fixed on string end set collar, and the other end of metallic cord fastens in the axis of cone that fixes on string bolt.
Above-described test unit, frame is U font, comprises base plate and two blocks of side plates that are connected with base plate, string bolt seat is fixed on the outside of the first side plate, comprises described string hole on the first side plate; One end of metallic cord, through the string hole of the second side plate, is fixed on string end set collar; The other end of metallic cord, through the string hole of the first side plate, is fixed in the axis of cone of string bolt.
Above-described test unit, comprises for testing the CALIBRATION of metallic cord vibration sounding frequency.
Above-described test unit, the material of frame, string bolt seat, string end set collar chord bolt is stainless steel.
Above-described test unit, metallic cord is steel wire.
Above-described test unit, metallic cord tensioning system is guitar or violin, the string of guitar or violin is described metallic cord.
Above-described test unit, the agent structure of guitar or violin is wrapped up with tinfoil paper.
The utility model can carry out contrast test to many string wires simultaneously, test efficiency is high.
Utilize CALIBRATION to obtain string in the sound signal of the metallic cord vibration sounding fundamental frequency that shakes and converse metallic cord stress value, the tension stress of adjusting metallic cord in metallic cord tensioning system according to the stress value of current metallic cord is again to desired value, the tension stress calibration of metallic cord is convenient, accurately, be convenient to metal material and play rust and obtain accurate result with the test of stress relation.
[accompanying drawing explanation]
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
Fig. 1 is the front view of the utility model embodiment metallic cord tensioning system.
Fig. 2 is the vertical view of the utility model embodiment metallic cord tensioning system.
Fig. 3 is that A in Fig. 1 is to cut-open view.
[embodiment]
The utility model embodiment metal material plays rust and the test unit of stress relation, comprises metallic cord tensioning system and for testing the CALIBRATION of metallic cord vibration sounding frequency.
Metallic cord tensioning system comprises 1,11 string bolt seats 2 of frame and 11 cover metallic cord assemblies, and metallic cord assembly comprises metallic cord 3, string end set collar 4 chord bolts 5.
Frame 1 is U font, comprises base plate 101 and the two blocks of side plates 102,103 that are connected with base plate 101, has row's string hole 103 on side plate 10 and side plate 103.
String bolt seat 2 use screws 6 are fixed on the outside of side plate 102, and string bolt seat 2 has a taper hole that string bolt 5 is installed, and the axis of cone of string bolt 5 is inserted in the taper hole of string bolt seat 2.
One end of metallic cord, through the string hole 103 of side plate 103, is fixed on string end set collar 4; The other end of metallic cord, through the string hole 103 of side plate 102, in the axis of cone of string bolt 5, rotates the tension stress that string bolt 5 can be adjusted metallic cord 3.
In order to prevent corrosion in process of the test, the material of frame 1, string bolt seat 2, string end set collar 4 chord bolts 5 is stainless steel.The rust that rises for reinforcing bar is tested, and metallic cord 3 adopts steel wires.11 cover metallic cord assemblies can configure steel filament of the same race, but the target tension stress that steel wire is adjusted can need different according to research.
Tension stress σ and the string of the metallic cord fundamental frequency f that shakes is relevant, and determining of σ can obtain according to the fundamental frequency formula inverting of shaking as lower edge:
In formula (1), f is the string fundamental frequency that shakes, and σ is target tension stress, and ρ is the mass density of metallic cord material, and l is the effective length of string.Thereby tension stress σ can obtain from following formula:
σ＝4ρl
2f
2 (2)
By International System of Units, in formula (2), the unit of each amount is as follows: wherein, and tension stress σ (Pa); Mass density ρ (kg/m
3); Length l (m); Frequency f (Hz).
In order to obtain the stress value of current metallic cord, by stirring metallic cord, make metallic cord vibration sounding, the sound signal that the pickup circuit of CALIBRATION sends while picking up metallic cord vibration sounding, obtains string in the sound signal fundamental frequency f that shakes, and is presented on LED charactron.According to the metallic cord string fundamental frequency f that shakes, can calculate the stress value σ of metallic cord.
Metallic cord stress value σ=4 ρ l
2f
2, wherein, ρ is metallic cord mass density, l is the effective length of metallic cord.
The tension stress that can adjust metallic cord in metallic cord tensioning system according to the stress value of the current metallic cord calculating is to desired value.
The metallic cord tensioning system of adjusting the tension stress of metallic cord is placed on to (as maybe needed the reinforced concrete actual working environment of monitoring in corrosion environment simulation box) in corrosion environment.Can, by the erosion break time of observing, recording various stress level effect lower edges, study metal material corrosion resistance and rule thereof under different Korrosionsmediums and concentration thereof, ambient temperature and humidity condition.
Metallic cord tensioning system and metallic cord stress means for correcting can provide the contrast and experiment of 11 rhizoid strings.
It is the similar structure of WMT-588C+ numeral beat sound-calibrator that CN92238794.X, name are called digital display electronic sound calibrator for piano or Shenzhen Wei Ke electronics technology development corporation, Ltd. that CALIBRATION can adopt the patent No..
When there is no above-mentioned special-purpose metal string tensioning system, the metallic cord tensioning system in stress corrosion (cracking) test can adopt cheaply the stringed musical instrument such as guitar or violin to replace, and now, the string of guitar or violin is to be used for the metallic cord of test.
For preventing damaging violin or guitar in process of the test, the agent structure of guitar or violin is wrapped up with tinfoil paper, only exposes nut to the test metallic cord in bridge (effective length) scope.
The analogue means of above-mentioned string instrument type is moved into environmental chamber.Can, by the erosion break time of observing, recording various stress level effect lower edges, study metal material corrosion resistance and rule thereof under different Korrosionsmediums and concentration thereof, ambient temperature and humidity condition.
Violin only can provide the contrast and experiment of four rhizoid strings at every turn, as adopted guitar to obtain each six contrast and experiment.
The above embodiment of the utility model can carry out contrast test to many string wires simultaneously, test efficiency is high; Utilize CALIBRATION to obtain string in the sound signal of the metallic cord vibration sounding fundamental frequency that shakes and converse metallic cord stress value, the tension stress of adjusting metallic cord in metallic cord tensioning system according to the stress value of current metallic cord is again to desired value, the tension stress calibration of metallic cord is convenient, accurately, be convenient to metal material and play rust and obtain accurate result with the test of stress relation.
Claims (7)
1. metal material plays a test unit for rust and stress relation, comprises metallic cord tensioning system, it is characterized in that, metallic cord tensioning system comprises frame, string bolt seat and plural number cover metallic cord assembly, and metallic cord assembly comprises metallic cord, string end set collar chord bolt; One end of string bolt seat fixed frame, string bolt seat comprises the taper hole that string bolt is installed, the axis of cone of string bolt is inserted described taper hole; The string hole that the other end of frame comprises, one end of metallic cord, through described string hole, is fixed on string end set collar, and the other end of metallic cord fastens in the axis of cone that fixes on string bolt.
2. test unit according to claim 1, is characterized in that, frame is U font, comprises base plate and two blocks of side plates that are connected with base plate, and string bolt seat is fixed on the outside of the first side plate, comprises described string hole on the first side plate; One end of metallic cord, through the string hole of the second side plate, is fixed on string end set collar; The other end of metallic cord, through the string hole of the first side plate, is fixed in the axis of cone of string bolt.
3. test unit according to claim 1, is characterized in that, comprises for testing the CALIBRATION of metallic cord vibration sounding frequency.
4. test unit according to claim 1, is characterized in that, the material of frame, string bolt seat, string end set collar chord bolt is stainless steel.
5. test unit according to claim 1, is characterized in that, metallic cord is steel wire.
6. test unit according to claim 1, is characterized in that, metallic cord tensioning system is guitar or violin, and the string of guitar or violin is described metallic cord.
7. test unit according to claim 6, is characterized in that, the agent structure of guitar or violin is wrapped up with tinfoil paper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420506737.6U CN204027982U (en) | 2014-09-03 | 2014-09-03 | Metal material plays the test unit of rust and stress relation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420506737.6U CN204027982U (en) | 2014-09-03 | 2014-09-03 | Metal material plays the test unit of rust and stress relation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204027982U true CN204027982U (en) | 2014-12-17 |
Family
ID=52067824
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420506737.6U Expired - Fee Related CN204027982U (en) | 2014-09-03 | 2014-09-03 | Metal material plays the test unit of rust and stress relation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204027982U (en) |
-
2014
- 2014-09-03 CN CN201420506737.6U patent/CN204027982U/en not_active Expired - Fee Related
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Mao et al. | Fatigue reliability assessment of a long-span cable-stayed bridge based on one-year monitoring strain data | |
| CN105022860B (en) | PCB solder joint random vibration Prediction method for fatigue life and system | |
| CN101441199B (en) | High-order longitudinal wave guide measuring method of steel strand prestress | |
| CN103940903B (en) | A kind of truss structure Joint Damage detecting system and its method | |
| JP2007163384A (en) | Device and method for evaluating fatigue damage | |
| WO2011029439A1 (en) | Model-based method for monitoring the condition of rotor blades | |
| CN105067703A (en) | Plate-like metal member/material remaining life non-destructive detection and evaluation method | |
| CN106596100B (en) | A kind of four-step machine tool chief axis elasticity modulus lossless detection method and device | |
| US5652386A (en) | Method and apparatus for predicting sturctural integrity by estimating modal damping factor | |
| CN106932135A (en) | The flexible cable cable tension test method that peak recognizes vibration frequency is searched based on weighting arrowband | |
| CN107300432A (en) | A kind of method and apparatus for being used to realize live adaptive cable force measurement | |
| CN110321616B (en) | Three-span tower fault diagnosis method based on wavelet transformation and attention model | |
| Alves et al. | A fast and efficient feature extraction methodology for structural damage localization based on raw acceleration measurements | |
| CN109781863B (en) | Structure corrosion two-stage detection method and system based on rapid vibration test | |
| CN204027982U (en) | Metal material plays the test unit of rust and stress relation | |
| Peil | Assessment of bridges via monitoring | |
| CN104266957B (en) | Metal material plays the experimental rig and test method of rust and stress relation | |
| Yu et al. | Fatigue Life Evaluation of Parallel Steel-Wire Cables under the Combined Actions of Corrosion and Traffic Load | |
| Birgin et al. | Dynamic behavior of structural beams made of innovative smart concrete | |
| KR20110109217A (en) | Method for measuring tension of cable, media that program executing the method is recorded, analyzing device that the program is installed | |
| JP2017090057A (en) | Soundness evaluating and determining method for anchor bolts | |
| KR101931686B1 (en) | System for monitoring wall-thinning of pipe and method thereof | |
| CN111222723A (en) | Method and system for evaluating vibration fatigue life of lead | |
| CN109283246B (en) | Damaged position location detecting system of aerogenerator blade | |
| Ellett et al. | GRACE gravity fields as a new measure for assessing large-scale hydrological models |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141217 Termination date: 20200903 |