CN104964918A - Device and method for measuring corrosion rate of steel bar - Google Patents
Device and method for measuring corrosion rate of steel bar Download PDFInfo
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- CN104964918A CN104964918A CN201510369952.5A CN201510369952A CN104964918A CN 104964918 A CN104964918 A CN 104964918A CN 201510369952 A CN201510369952 A CN 201510369952A CN 104964918 A CN104964918 A CN 104964918A
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Abstract
The invention discloses a device and method for measuring the corrosion rate of a steel bar. The device for measuring the corrosion rate of the steel bar comprises a steel bar fixing system, a liquid filling and discharging system and a measurement and control system. The underwater penetration of the steel bar to be measured is changed by continuously injecting water into a liquid container of the liquid filling and discharging system, the water level and force are acquired in time, and a curve chart of the local corrosion rate, in the length direction, of the steel bar is obtained by processing the water level and the force in a unified mode through a single-chip microcomputer. According to the device and method for measuring the corrosion rate of the steel bar, the measurement precision is high, the measurement efficiency is high, the method and device are suitable for long steel bars, automatic control can be achieved, the local corrosion rate of the steel bar can be measured accurately, and the curve chart of the corrosion rate, in the length direction, of the steel bar can be drawn.
Description
Technical field
The present invention relates to reinforcing steel corrosion rate to measure, be specifically related to a kind of reinforcing steel corrosion rate determinator and assay method, belong to the measurement mechanism of concrete construction art.
Background technology
In field of civil engineering, reinforcing bar and concrete are the building materialss be most widely used in the world at present, and a large amount of building structure is all built up by reinforced concrete, but due to concrete carbonization and muriatic erosion etc., can cause the corrosion of reinforcing bar.Steel bar corrosion in concrete is the one of the main reasons causing xoncrete structure premature failure, reinforcement corrosion reduces security and the permanance of works, cause the endurance issues occurred in xoncrete structure in various degree: as the cracking of xoncrete structure, inner steel bar corrosion, Frozen-thawed cycled, alkali etc. reduce load-bearing capacity and the tenure of use of buildings, cause structure durability to lose efficacy.
The people such as the Hui Yunling of Ministry of Metallurgical Industry Building Research General Institute find in research corrosion is on the impact of reinforcement property: when reinforcing steel corrosion rate is less than 1%, the mechanical performance index of Corrosion Reinforcement is basic identical with mother metal, can not consider the impact of corrosion on steel bar mechanics performance; The steel bar mechanics performance index that corrosion ratio is less than 5% can think identical with mother metal, but needs the loss considering Corrosion Reinforcement cross section when structural bearing capacity calculates; Reinforcement stresses-strain curve that corrosion ratio is greater than 10% does not have obvious yield point, the nominal-ultimate strength of Corrosion Reinforcement and nominal limit strength than and corrosion weight ratio linear.Both at home and abroad other scholars in corrosion on the impact of concrete performance and corrosion in the research in the impact of adhesive property between reinforcing bar and concrete etc., also find the corrosion ratio of reinforcing bar on concrete performance and between reinforcing bar and concrete adhesive property have significant impact.As can be seen here, the research of reinforcing steel corrosion rate becomes problem demanding prompt solution, at present at engineering field, has become one of the most popular problem in concrete durability to the research of steel bar corrosion.
The method great majority of current mensuration reinforcing steel corrosion rate adopt the method for regulation in " Standard for test methods of longterm performance and durability of ordinary concrete " (GBJ82-85): take out reinforcing bar in test specimen, scrape off the concrete that reinforcing bar adheres to, pickling is carried out with 12% hydrochloric acid solution, after clear water rinses, with lime water neutralization, finally rinse well with clear water again; In exsiccator, at least deposit 4 hours after drying, weighing with analytical balance calculates corrosion weightlessness.
Obviously, the average corrosion rate of whole reinforcing bar is actually with the reinforcing steel corrosion rate that the method in specification determines, but in fact in physical environment, the corrosion of reinforcing bar is uneven, different along the corrosion ratio of the unit length of reinforcing bar length direction, therefore, the corrosion ratio measured as stated above can not reflect the true corrosion ratio of each section of reinforcing bar, and the bearing capacity of reinforcing bar depends on the maximum corrosion ratio along reinforcing bar length direction, studies the bearing capacity of its average corrosion rate to result of calculation nonsensical.
For above-mentioned defect, patent application 201210303757.9 discloses a kind of device and method measuring reinforcing bar corrosion ratio along its length, and wherein, device comprises table top, stationary installation, determinator and data collector; Stationary installation comprises fixed mount and fixture, and fixed mount is provided with scale; Determinator comprises container, water and weightometer, and water level is in container; Data acquisition system (DAS) comprises a computing machine; What one end of fixture can move up and down is arranged on fixed mount, and the other end of fixture is fixed on the upper end of reinforcing bar, and the lower disconnected of reinforcing bar is placed in water; Fixed mount is arranged on weightometer, and weightometer is connected to computing machine by wire, and container and weightometer are placed on table top.Although the proving installation of this invention can measure reinforcing bar corrosion ratio along its length, there is following multiple problem: steel bar corrosion amount itself is very little numerical value, need to measure very accurately; The water surface in reinforcing bar decline process in container rises, and can bring measuring error; Adopt the falling amount of the manual adjustments in the present invention and range estimation reinforcing bar to measure corrosion, not only operating process is loaded down with trivial details, and detection efficiency is low, and there will be very large error; Fixed mount adopts cantilever structure, causes certain wobbler action, may cause certain measuring error; The quality that weighing instrument weighs comprises the quality of reinforcing bar and fixed mount, therefore needs the range of weighing instrument enough large; The h change of power that causes in whereabouts is less at every turn for reinforcing bar, and therefore need the precision of weighing instrument enough high, the weighing instrument manufacturing large range high precision is higher to technical requirement.Therefore, there is larger limitation in actual applications in this device.
In order to improve the problems referred to above, patent application 201410151435.9 discloses a kind of determinator and assay method of reinforcing steel corrosion rate.The determinator of reinforcing steel corrosion rate comprises the container of weighing instrument, computer system, fixture and dress liquid, computer system comprises processor, input media and display device, the data output end of weighing instrument connects the processor of computer system, reinforcing bar jacking gear comprises the linear displacement transducer of frame, fixture, jig lifting mechanism and perception fixture lifting distance, and the displacement data of linear displacement transducer exports the processor of termination computer system.The weighing instruments that this invention adopts, measurement be the gross mass of water in dress liquid container and overflow vessel, the change of power can not be embodied; Although this invention adopts overflow-type that liquid level can be kept constant, but because bar diameter is less, each height declined is also less, and the liquid therefore overflowed is little, a small amount of liquid can stick to the outer wall of shape liquid container and not flow directly into overflow vessel, causes final measuring error larger; Reinforcing bar one end is clipped in below reinforcing bar chuck, and the other end immerses in liquid, is unfavorable for like this measuring longer reinforcing bar, such as when the reinforcing bar length measured is 2m, the height of device will be at least 4m, and device excessive height, be unfavorable for that device is stablized, be also unfavorable for manual operation; Jacking system adopts pure Electronic control, is unfavorable for the micro-positioning regulators of displacement, namely cannot ensure that displacement has enough precision.
To sum up, there is no gratifying reinforcing steel corrosion rate determinator and assay method in prior art.
Summary of the invention
For solving the deficiencies in the prior art, the object of the present invention is to provide determinator and the assay method of the reinforcing steel corrosion rate that a kind of measuring accuracy is high, efficiency is high, can Automated condtrol be realized, measure reinforcing bar local corrosion ratio exactly and draw out reinforcing bar corrosion ratio curve map along its length.
In order to realize above-mentioned target, the present invention adopts following technical scheme:
A kind of reinforcing steel corrosion rate determinator, comprising: reinforcing bar fixed system, liquid are filled with and let out system and TT&C system, described reinforcing bar fixed system comprises: reinforcing bar lifting frame and auxiliary stand, wherein, described reinforcing bar lifting frame comprises: pedestal, the multiple foot screws being installed on base bottom, the circular bubble being arranged at pedestal upper surface, centre be formed through-hole structure top board, connect pedestal and the many hydraulically extensible struts controlled by hydraulic means of top board, the first cushion block being installed on hydraulically extensible bar and top board junction and the first rubber sheet gasket, described auxiliary stand is installed on top board, comprise: be connected to the multiple electric expansion bars on top board, the a pair cross slide way beam be fixedly connected with electric expansion bar, and a pair longitudinal rail beam that cross slide way beam is slidably connected and the guide block be slidably connected between longitudinal rail beam, the second cushion block and the second rubber sheet gasket is provided with in the junction of electric expansion bar and cross slide way beam, described guide block central authorities offer the female hole of a tool, an abutment sleeve is connected in hole, a reinforced bar sleeve for fixing reinforcing bar be slidably connected with it is provided with in described abutment sleeve, the two ends of abutment sleeve are equipped with reinforcing bar fixed chuck,
Described liquid is filled with the system of letting out and is comprised: liquid containing container, water pump and be divided into water inlet and the freeing port of liquid containing container both sides, between the pedestal that liquid containing container is arranged at reinforcing bar fixed system and top board;
Described TT&C system comprises: force snesor, level gauging instrument, water pump controller, data collecting instrument and single-chip microcomputer, described force snesor to be fixed in the through hole of top board and can to pass for reinforcing bar, the lower end of described force snesor is provided with a reinforcing bar fixed chuck, described level gauging instrument is installed on the bottom side of top board and is in the overthe openings of liquid containing container, single-chip microcomputer comprises water pump signal control port and data collecting instrument signal control port, be connected with signal transmission with water pump controller and data collecting instrument respectively, realize the automatic control to water pump, and to the continuous synchronization collection of liquid level and power and storage.
Aforementioned foot screw is laid in the bottom of pedestal with equilateral triangle or square, by regulating foot screw, pedestal is horizontal.
Preferably, aforementioned pedestal is formed with locating groove, the bottom of described liquid containing container is installed in locating groove.
In order to realize smooth slip, the inwall of aforementioned abutment sleeve is uniformly distributed circumferentially many chutes, is provided with smooth steel ball in chute, realizes sliding between reinforced bar sleeve and abutment sleeve by steel ball.
In practical operation, reinforcing bar is fixedly connected in reinforced bar sleeve by multiple pin.
Further, aforementioned reinforcing bar fixed system also comprises a pair electromagnetism being connected to guide block end face and bottom surface and fixes slide block, produces magnetic force when described electromagnetism fixes slide block energising, utilizes galvanomagnetic effect by abutment sleeve absorption locking, thus prevent its vertical displacement, improve the accuracy measured.
Particularly, aforementioned liquids container comprises: be arranged at the glassware on pedestal and the folding sleeve being connected to glassware top, the top of described folding sleeve is connected to the bottom side of top board by sleeve pipe link; Between pedestal and top board, be also provided with some collar supports framves, described folding sleeve is fixed by sleeve pipe retainer plate and collar supports frame to prevent from rocking, and improves steadiness.
Preferably, the through-hole structure of aforementioned force snesor and top board is threaded connection.
Further, this device also comprises an electric operated control box, and described electric operated control box is provided with: transverse electric control knob, longitudinal electric control knob, vertical Electronic control button and electromagnetism fix control knob; Longitudinal rail beam and cross slide way beam are slidably connected, and realize laterally sliding by transverse electric control knob; Longitudinal rail beam offers guide rail along its length, and guide block thickness is 20 ~ 50mm, under the manipulation of longitudinal electric control knob, realize longitudinal sliding motion; The torsion of abutment sleeve is then realized by vertical Electronic control button, its vertical position of fine adjustment.
In addition, the invention also discloses and utilize aforesaid determinator to measure the method for reinforcing steel corrosion rate, comprise the steps:
(1), at the two ends of reinforcing bar to be measured demarcate two initial point cross sections, measure the reinforcing bar total length L between two initial point cross sections
0mm, is accurate to 0.1mm;
(2) foot screw, bottom adjusting base, observes the bubble in the circular bubble of pedestal upper surface, and repeatedly regulate foot screw until bubble in circular bubble is positioned at the centre of circular bubble, namely pedestal is horizontal;
(3), by reinforcing bar penetrate in reinforced bar sleeve, the distance keeping reinforced bar sleeve centre distance reinforcing bar one end is 0.25L
0, and with pin, reinforced bar sleeve is fixedly connected with reinforcing bar;
(4) lifting frame and the auxiliary stand extremely extremely applicable height operated of whole device height, is adjusted, make with reinforced bar sleeve one end reinforcing bar upward, and reinforcing bar is penetrated in lifting frame from top, pass the abutment sleeve of auxiliary stand, top board and force snesor successively, righting reinforcing bar, the hydraulically extensible strut of adjustment lifting frame, makes the height H of lifting frame rise to [0.5L
0+ (100 ~ 200)] mm;
(5), according to the length of reinforcing bar on top board top, the height of adjustment auxiliary stand electric expansion bar, makes auxiliary stand height be 1/2 ~ 2/3 of the above reinforcing bar length of top board, stablizes to keep whole reinforcing bar;
(6), control electric operated control box, tentatively make the reinforcing bar fixed chuck on auxiliary stand on abutment sleeve and force snesor align up and down;
(7), Primary Location reinforcing bar, twisted bar, prevent the pin on reinforced bar sleeve and the steel ball in fixed muffle from coming in contact, the reinforcing bar fixed chuck of screwed in place sleeve upper and lower side, reinforcing bar is fixed on abutment sleeve, adjustment electric expansion bar, makes the reinforcing bar length of below force snesor for [0.5L
0+ (50 ~ 100)] mm, and make reinforcing bar lower end and liquid containing container bottom distance be greater than 30mm;
(8), by water inlet open, close freeing port, add water near reinforcing bar initial point cross section in organic glass vessel;
(9), accurate adjustment auxiliary stand, make the reinforcing bar fixed chuck of abutment sleeve end on auxiliary stand and the reinforcing bar fixed chuck accurate contraposition of force snesor lower end, knob abutment sleeve finely tunes its vertical position, and the reinforcing bar initial point cross section of initial alignment and liquid level are overlapped;
(10), opening electromagnetism fixes slider switch, the vertical position of lock in place sleeve;
(11), the reinforcing bar fixed chuck of force snesor lower end is tightened with fixing reinforcing bar, then folding sleeve is suspended on sleeve pipe link, finally sleeve pipe retainer plate is connected on collar supports bar by connecting link;
(12), close electromagnetism and fix slider switch, and unclamp the reinforcing bar fixed chuck of abutment sleeve upper and lower side, the weight of whole reinforcing bar is born by force snesor completely;
(13), set into water flow velocity, open TT&C system and start automatic measurement, continuous synchronization gathers liquid level and power;
(14), the liquid level data collected is converted to reinforcing bar coordinate figure along its length through the process of system by the data handling system of single-chip microcomputer, the power collected is converted to the local corrosion ratio of reinforcing bar, then draws out reinforcing bar corrosion ratio curve map along its length by drafting system;
Reinforcing bar coordinate figure is along its length: x
i=l
1-l
i, wherein, l
ibe the displacement of measuring for i-th time, l
1for the distance that the level gauging instrument when the initial point cross section of initial alignment and liquid level overlap measures;
The corrosion weight-loss ratio of i-th (i>=1) section reinforcing bar is:
wherein, F
i' for unattacked reference muscle is at x=x
itime measured power, F
ifor corrosion muscle is at x=x
itime measured power, F
i+1' for unattacked reference muscle is at x=x
i+1time measured power, F
i+1for corrosion muscle is at x=x
i+1time measured power;
Drafting system with
for coordinate figure, some remittance abroad first half section reinforcing bar corrosion ratio coordinate points along its length; With
for coordinate figure, some remittance abroad second half section reinforcing bar corrosion ratio coordinate points along its length, is connected to form corrosion ratio curve map along its length with smooth curve;
(15), when measurement length reaches a half of reinforcing bar total length, stop measuring, close TT&C system;
(16), close water inlet, open freeing port, the water in container is all drained, take off liquid containing container, shrink the hydraulic strut of lifting frame, take out reinforcing bar;
(17), by reinforcing bar reverse end for end, and reinforced bar sleeve is fixed on the reinforcing bar other end, then reinforcing bar is reinstalled on reinforcing bar fixed system, then repetitive operation (4) ~ (16) step, until the corrosion ratio of whole reinforcing bar is measured complete.
Usefulness of the present invention is: solve the problem that longer reinforcing bar local corrosion ratio measures inconvenience, the local corrosion ratio that can adapt to different length reinforcing bar measures, and has higher versatility; Device of the present invention effectively can reduce the maximum height of device when measuring longer reinforcing bar, when measuring the reinforcing bar of equal length, height needed for this device is roughly the length of reinforcing bar itself, and the height required for device in prior art disclosed in (as patent application 201410151435.9) is roughly 2 times of reinforcing bar length, therefore this device is more stable, facilitates human users; Device of the present invention is without the need to a reinforcing bar distance of fall given in advance, adopt real-time continuous synchro measure and gather liquid level and power, improve measuring accuracy and speed, and displacement and payload data gather simultaneously, form a pair data group, process through single-chip microcomputer directly can obtain reinforcing bar corrosion ratio curve map along its length, shows reinforcing bar uneven corrosion degree along its length intuitively.
Accompanying drawing explanation
Fig. 1 is the front view of a preferred embodiment of reinforcing steel corrosion rate determinator of the present invention;
Fig. 2 is the partial enlargement structural representation at G place in Fig. 1;
Fig. 3 is side view embodiment illustrated in fig. 1;
Fig. 4 is the vertical view of middle auxiliary stand embodiment illustrated in fig. 1;
Fig. 5 is the schematic diagram of the electric operated control box of reinforcing steel corrosion rate determinator of the present invention;
Fig. 6 is the logic relation picture of part instrument in TT&C system of the present invention;
Fig. 7 is the corrosion ratio curve map that reinforcing steel corrosion rate layer method of the present invention obtains.
The implication of Reference numeral in figure: 1, pedestal, 2, foot screw, 3, circular bubble, 4, top board, 5, hydraulically extensible strut, 6, first cushion block, 7, first rubber sheet gasket, 8, electric expansion bar, 9, cross slide way beam, 10, longitudinal rail beam, 11, guide block, 12, second cushion block, 13, second rubber sheet gasket, 14, abutment sleeve, 15, reinforced bar sleeve, 16, reinforcing bar fixed chuck, 17, steel ball, 18, electromagnetism fixes slide block, 19, glassware, 20, folding sleeve, 21, sleeve pipe link, 22, collar supports frame, 23, water inlet, 24, freeing port, 25, force snesor, 26, level gauging instrument, 27, water pump controller, 28, data collecting instrument, 29, single-chip microcomputer, 30, reinforcing bar.
Embodiment
Below in conjunction with the drawings and specific embodiments, concrete introduction is done to the present invention.
See Fig. 1 to Fig. 4, reinforcing steel corrosion rate determinator of the present invention comprises: reinforcing bar fixed system, liquid are filled with and let out system and TT&C system, can realize continuous acquisition reinforcing steel corrosion rate expeditiously, measurement result accurately and reliably and measure convenient.
Wherein, reinforcing bar fixed system is for accurately being located by reinforcing bar 30 to be determined and fix, specifically comprising: reinforcing bar lifting frame and auxiliary stand.Reinforcing bar lifting frame comprises: pedestal 1, be installed on the multiple foot screws 2 bottom pedestal 1, top board 4 that the circular bubble 3 being arranged at pedestal 1 upper surface, centre are formed with through-hole structure, connect many hydraulically extensible struts 5 of pedestal 1 and top board 4, be installed on the first cushion block 6 and the first rubber sheet gasket 7 of hydraulically extensible bar and top board 4 junction.Foot screw 2 is laid in the bottom of pedestal 1 with equilateral triangle or square, and by regulating foot screw 2 to make pedestal 1 be horizontal, pedestal 1 whether monitored by circular bubble 3 by level.Hydraulically extensible bar is 4, controlled by four synchronous hydraulic devices respectively, cross sectional shape is circular or square, its top and the first cushion block 6 are welded to connect, with bolts between first cushion block 6 and top board 4, between top board 4 with the first cushion block 6, pad one deck first rubber sheet gasket 7 top board 4 is closely connected with the first cushion block 6.The through-hole structure that top board 4 central authorities offer has female thread structure, is force snesor 25 for setting forth after fixing.
Composition graphs 3 and Fig. 4, auxiliary stand is installed on top board 4, comprising: the guide block 11 being connected to a pair cross slide way beam 9 that the multiple electric expansion bar 8 on top board 4 is fixedly connected with electric expansion bar 8 and a pair longitudinal rail beam 10 that cross slide way beam 9 is slidably connected and being slidably connected between longitudinal rail beam 10.Electric expansion bar 8 is also 4, cross sectional shape is circular or square, be arranged in the center of top board 4 symmetrically, its top and the second cushion block 12 weld together, second cushion block 12 is connected by coupling bolt with laterally steering beam, further, be also lined with one deck second rubber sheet gasket 13 between to be closely connected with the second cushion block 12 to make laterally steering beam.Be formed with guide rail for longitudinally guiding beam transverse shifting at the length direction of laterally steering beam, the left and right directions namely in Fig. 4 moves.Be formed with guide rail at the length direction of longitudinally guiding beam to vertically move for guide block 11, the above-below direction namely in Fig. 4.
As shown in Figure 4, the female hole of a tool is offered in guide block 11 central authorities, an abutment sleeve 14 is connected in hole, a reinforced bar sleeve 15 for fixing reinforcing bar be slidably connected with it is provided with in abutment sleeve 14, the two ends of abutment sleeve 14 are equipped with reinforcing bar fixed chuck 16, thus by fixing for reinforcing bar 30 clamping.In order to realize smooth slip, the inwall of abutment sleeve 14 is uniformly distributed circumferentially 4 chutes, is provided with smooth steel ball 17 in chute, realizes sliding between reinforced bar sleeve 15 and abutment sleeve 14 by steel ball 17.
Further, this reinforcing bar fixed system also comprises a pair electromagnetism being connected to guide block 11 end face and bottom surface and fixes slide block 18, fixes when slide block 18 is energized can produce magnetic force when electromagnetism, utilizes galvanomagnetic effect that abutment sleeve 14 is adsorbed locking, thus prevent its vertical displacement, improve the accuracy measured.
So, can fine adjustment be carried out to horizontal, the longitudinal direction of reinforcing bar 30 and vertical position by above-mentioned reinforcing bar fixed system and can accurately locate, for follow-up measurement is ready.In order to realize measuring, determinator of the present invention also comprises liquid filling and lets out system and TT&C system.
Wherein, as shown in Figure 1, liquid is filled with the system of letting out and is comprised: liquid containing container, water pump and be divided into water inlet 23 and the freeing port 24 of liquid containing container both sides, and liquid containing container is arranged between the pedestal 1 of reinforcing bar fixed system and top board 4.Liquid containing container specifically comprises: be arranged at the glassware 19 on pedestal 1 and the folding sleeve 20 being connected to glassware 19 top, folding sleeve 20 is telescopic, conveniently regulate according to the high flexible of reinforcing bar fixed system, its top is connected to the bottom side of top board 4 by sleeve pipe link 21; Between pedestal 1 and top board 4, be also provided with some collar supports framves 22, by sleeve pipe retainer plate by fixing to prevent from rocking to folding sleeve 20 and collar supports frame 22, improve steadiness, avoid causing interference to test process.Further, pedestal 1 is formed with locating groove, the bottom of glassware 19 is installed in locating groove.
TT&C system realizes measuring and automatically controlled core, it comprises: force snesor 25, level gauging instrument 26, water pump controller 27, data collecting instrument 28 and single-chip microcomputer 29, as previously described, force snesor 25, by passing for reinforcing bar 30 in the through-hole structure that is screwed on top board 4, is also provided with a reinforcing bar fixed chuck 16 to lock reinforcing bar 30 in the lower end of force snesor 25; Level gauging instrument 26 is installed on the bottom side of top board 4 and is in the overthe openings of liquid containing container.See Fig. 6, single-chip microcomputer 29 comprises water pump signal control port A and data collecting instrument 28 signal control port B, be connected with signal transmission with water pump controller 27 and data collecting instrument 28 respectively, realize to the automatic control of water pump and to the continuous synchronization collection of liquid level and power and storage.
In order to realize automation mechanized operation, this device also comprises an electric operated control box, as shown in Figure 5, electric operated control box is provided with: transverse electric control knob C, longitudinal electric control knob D, vertical Electronic control button E and electromagnetism fix control knob F; Longitudinal rail beam 10 and cross slide way beam 9 are slidably connected, and realize laterally sliding by transverse electric control knob C; Longitudinal rail beam 10 offers guide rail along its length, and guide block 11 thickness is 20 ~ 50mm, under the manipulation of longitudinal electric control knob D, realize longitudinal sliding motion; The torsion of abutment sleeve 14 is then realized by vertical Electronic control button E, its vertical position of fine adjustment; Electromagnetism fixes control knob F then can fix slide block 18 by switch electromagnetism.
In addition, the invention also discloses and utilize aforesaid determinator to measure the method for reinforcing steel corrosion rate, measuring object in the present embodiment is: diameter is 20mm, total length is the deformed bar of 3m, correspondingly, the size of each parts of determinator is as follows: pedestal 1 is of a size of 1000mm × 1000mm × 50mm; Top board 4 is of a size of 1000mm × 1000mm × 30mm; The base diameter of glassware 19 is 200mm; The inside diameter of force snesor 25 is 50mm, length is 100mm; The diameter of hydraulically extensible strut 5 is 100mm; The diameter of electric expansion bar 8 is 75mm; Cross slide way beam 9 is of a size of 300mm × 70mm × 70mm; Longitudinal rail beam 10 is of a size of 37.5mm × 200mm × 50mm; Guide block 11 is of a size of 170mm × 80mm × 25mm; Abutment sleeve 14 internal diameter is 50mm; The precision of force snesor 25 is 0.001N, range is 200N; The precision of level gauging instrument 26 is 0.1mm, and range is 2m.
Specifically comprise the steps:
(1), at the two ends of reinforcing bar 30 to be measured demarcate two initial point cross sections, go out the reinforcing bar total length L between two initial point cross sections with tape measuring
0=3000mm;
(2) foot screw 2, bottom adjusting base 1, observes the bubble in the circular bubble 3 of pedestal 1 upper surface, and repeatedly regulate foot screw 2 until bubble in circular bubble 3 is positioned at the centre of circular bubble 3, namely pedestal 1 is horizontal;
(3), by reinforcing bar 30 penetrate in reinforced bar sleeve 15, the distance keeping reinforced bar sleeve 15 centre distance reinforcing bar 30 one end is 0.25L
0, and with pin, reinforced bar sleeve 15 is fixedly connected with reinforcing bar 30;
(4), adjustment lifting frame and auxiliary stand are to whole device height to about 1.0m, make with reinforced bar sleeve 15 one end reinforcing bar upward, and reinforcing bar 30 is penetrated in lifting frame from top, pass the abutment sleeve 14 of auxiliary stand, top board 4 and force snesor 25 successively, righting reinforcing bar 30, the hydraulically extensible strut 5 of adjustment lifting frame, makes the height H of lifting frame rise to [0.5L
0+ (100 ~ 200)] mm, i.e. 1.65m;
(5), according to the length in reinforcing bar 30 portion on the top plate 4, the height of adjustment auxiliary stand electric expansion bar 8, makes auxiliary stand height be 3/5 (about 1000mm) of top board more than 4 reinforcing bar length, stablizes to keep whole reinforcing bar 30;
(6), control electric operated control box, tentatively make the reinforcing bar fixed chuck about 16 on auxiliary stand on abutment sleeve 14 and force snesor 25 align;
(7), Primary Location reinforcing bar 30, twisted bar 30, prevent the pin on reinforced bar sleeve 15 and the steel ball in fixed muffle 17 from coming in contact, the reinforcing bar fixed chuck 16 of screwed in place sleeve 14 upper and lower side, reinforcing bar 30 is fixed on abutment sleeve 14, adjustment electric expansion bar 8, makes the reinforcing bar length of force snesor less than 25 for [0.5L
0+ (50 ~ 100)] mm, about 1.6m, and make reinforcing bar 30 lower end and liquid containing container bottom distance be greater than 30mm;
(8), by water inlet 23 open, close freeing port 24, add water near reinforcing bar 30 initial point cross section in organic glass vessel 19;
(9), accurate adjustment auxiliary stand, make the reinforcing bar fixed chuck 16 of abutment sleeve 14 end on auxiliary stand and reinforcing bar fixed chuck 16 accurate contraposition of force snesor 25 lower end, knob abutment sleeve 14 finely tunes its vertical position, and the reinforcing bar 30 initial point cross section of initial alignment and liquid level are overlapped;
(10), open electromagnetism and fix slide block 18 switch, the vertical position of lock in place sleeve 14;
(11), by the reinforcing bar fixed chuck 16 of force snesor 25 lower end tighten with fixing reinforcing bar 30, then folding sleeve 20 is suspended on sleeve pipe link 21, finally sleeve pipe retainer plate is connected on collar supports bar by connecting link;
(12), close electromagnetism and fix slide block 18 switch, and unclamp the reinforcing bar fixed chuck 16 of abutment sleeve 14 upper and lower side, the weight of whole reinforcing bar 30 is born by force snesor 25 completely;
(13), set into water flow velocity be 300cm
3/ s, opens TT&C system and starts automatic measurement, and the survey frequency of control data Acquisition Instrument 28 (comprising displacement acquisition instrument and load Acquisition Instrument) is 5 times/s, when level gauging instrument 26 reading is less than 75mm, stops measuring, closes TT&C system;
(14), the liquid level data collected is converted to reinforcing bar 30 coordinate figure along its length through the process of system by the data handling system of single-chip microcomputer 29, the power collected is converted to the local corrosion ratio of reinforcing bar 30, then draws out reinforcing bar 30 corrosion ratio curve map along its length by drafting system;
Reinforcing bar 30 coordinate figure is along its length: x
i=l
1-l
i, wherein, l
ibe the displacement of measuring for i-th time, l
1for the distance that the level gauging instrument 26 when the initial point cross section of initial alignment and liquid level overlap measures;
The corrosion weight-loss ratio of i-th (i>=1) section reinforcing bar is:
wherein, F
i' for unattacked reference muscle is at x=x
itime measured power, F
ifor corrosion muscle is at x=x
itime measured power, F
i+1' for unattacked reference muscle is at x=x
i+1time measured power, F
i+1for corrosion muscle is at x=x
i+1time measured power;
Drafting system with
for coordinate figure, some remittance abroad first half section reinforcing bar corrosion ratio coordinate points along its length; With
for coordinate figure, some remittance abroad second half section reinforcing bar corrosion ratio coordinate points along its length, is connected to form corrosion ratio curve map along its length with smooth curve;
(15), when measurement length reaches a half of reinforcing bar total length, stop measuring, close TT&C system;
(16), close water inlet 23, open freeing port 24, the water in container is all drained, take off liquid containing container, shrink the hydraulic strut of lifting frame, take out reinforcing bar 30;
(17), reinforcing bar 30 is reversed end for end, and reinforced bar sleeve 15 is fixed on the reinforcing bar other end, again reinforcing bar 30 is reinstalled on reinforcing bar fixed system, repetitive operation again (4) ~ (16) step, until the corrosion ratio of whole reinforcing bar 30 is measured complete, the reinforcing bar 30 drawn out corrosion ratio curve map along its length as shown in Figure 7.
To sum up, determinator of the present invention solves the problem that longer reinforcing bar local corrosion ratio measures inconvenience, and the local corrosion ratio that can adapt to different length reinforcing bar measures, and has higher versatility; Device of the present invention effectively can reduce the maximum height of device when measuring longer reinforcing bar, the height needed for this device is roughly the length of reinforcing bar itself, facilitates human users; And, device of the present invention is without the need to a reinforcing bar distance of fall given in advance, adopt real-time continuous synchro measure and gather liquid level and power, improve measuring accuracy and speed, and displacement and payload data gather simultaneously, form a pair data group, the process through single-chip microcomputer 29 directly can obtain reinforcing bar corrosion ratio curve map along its length, shows reinforcing bar uneven corrosion degree along its length intuitively.
More than show and describe ultimate principle of the present invention, principal character and advantage.The technician of the industry should understand, and above-described embodiment does not limit the present invention in any form, the technical scheme that the mode that all employings are equal to replacement or equivalent transformation obtains, and all drops in protection scope of the present invention.
Claims (10)
1. a reinforcing steel corrosion rate determinator, is characterized in that, comprising: reinforcing bar fixed system, liquid are filled with and let out system and TT&C system;
Described reinforcing bar fixed system comprises: reinforcing bar lifting frame and auxiliary stand, wherein, described reinforcing bar lifting frame comprises: pedestal, the multiple foot screws being installed on base bottom, the circular bubble being arranged at pedestal upper surface, centre be formed through-hole structure top board, connect pedestal and many hydraulically extensible struts of top board, the first cushion block being installed on hydraulically extensible bar and top board junction and the first rubber sheet gasket, described auxiliary stand is installed on top board, comprise: be connected to the multiple electric expansion bars on top board, the a pair cross slide way beam be fixedly connected with electric expansion bar, and a pair longitudinal rail beam that cross slide way beam is slidably connected and the guide block be slidably connected between longitudinal rail beam, the second cushion block and the second rubber sheet gasket is provided with in the junction of electric expansion bar and cross slide way beam, described guide block central authorities offer the female hole of a tool, an abutment sleeve is connected in hole, a reinforced bar sleeve for fixing reinforcing bar be slidably connected with it is provided with in described abutment sleeve, the two ends of abutment sleeve are equipped with reinforcing bar fixed chuck,
Described liquid is filled with the system of letting out and is comprised: liquid containing container, water pump and be divided into water inlet and the freeing port of liquid containing container both sides, between the pedestal that liquid containing container is arranged at reinforcing bar fixed system and top board;
Described TT&C system comprises: force snesor, level gauging instrument, water pump controller, data collecting instrument and single-chip microcomputer, described force snesor to be fixed in the through hole of top board and can to pass for reinforcing bar, the lower end of described force snesor is provided with a reinforcing bar fixed chuck, described level gauging instrument is installed on the bottom side of top board and is in the overthe openings of liquid containing container, and described water pump controller is all connected with single-chip microcomputer with data collecting instrument.
2. a kind of reinforcing steel corrosion rate determinator according to claim 1, it is characterized in that, described foot screw is laid in the bottom of pedestal with equilateral triangle or square.
3. a kind of reinforcing steel corrosion rate determinator according to claim 1, is characterized in that, described pedestal is formed with locating groove, and the bottom of described liquid containing container is installed in locating groove.
4. a kind of reinforcing steel corrosion rate determinator according to claim 1, is characterized in that, the inwall of described abutment sleeve is uniformly distributed circumferentially many chutes, is provided with smooth steel ball in chute, realizes sliding between reinforced bar sleeve and abutment sleeve by steel ball.
5. a kind of reinforcing steel corrosion rate determinator according to claim 4, it is characterized in that, reinforcing bar is fixedly connected in reinforced bar sleeve by multiple pin.
6. a kind of reinforcing steel corrosion rate determinator according to any one of claim 1-5, it is characterized in that, described reinforcing bar fixed system also comprises a pair electromagnetism being connected to guide block end face and bottom surface and fixes slide block, produces magnetic force when described electromagnetism fixes slide block energising, by abutment sleeve absorption locking.
7. a kind of reinforcing steel corrosion rate determinator according to claim 6, it is characterized in that, described liquid containing container comprises: be arranged at the glassware on pedestal and the folding sleeve being connected to glassware top, the top of described folding sleeve is connected to the bottom side of top board by sleeve pipe link; Between pedestal and top board, be also provided with some collar supports framves, described folding sleeve is fixed by sleeve pipe retainer plate and collar supports frame to prevent from rocking.
8. a kind of reinforcing steel corrosion rate determinator according to claim 1, it is characterized in that, the through-hole structure of described force snesor and top board is threaded connection.
9. a kind of reinforcing steel corrosion rate determinator according to claim 6, it is characterized in that, also comprise an electric operated control box, described electric operated control box is provided with: transverse electric control knob, longitudinal electric control knob, vertical Electronic control button and electromagnetism fix control knob.
10. utilize the method for the mensuration reinforcing steel corrosion rate of the determinator described in any one of claim 1-9, it is characterized in that, comprise the steps:
(1), at the two ends of reinforcing bar to be measured demarcate two initial point cross sections, measure the reinforcing bar total length L between two initial point cross sections
0mm, is accurate to 0.1mm;
(2) foot screw, bottom adjusting base, observes the bubble in the circular bubble of pedestal upper surface, and repeatedly regulate foot screw until bubble in circular bubble is positioned at the centre of circular bubble, namely pedestal is horizontal;
(3), by reinforcing bar penetrate in reinforced bar sleeve, the distance keeping reinforced bar sleeve centre distance reinforcing bar one end is 0.25L
0, and with pin, reinforced bar sleeve is fixedly connected with reinforcing bar;
(4) lifting frame and the auxiliary stand extremely extremely applicable height operated of whole device height, is adjusted, make with reinforced bar sleeve one end reinforcing bar upward, and reinforcing bar is penetrated in lifting frame from top, pass the abutment sleeve of auxiliary stand, top board and force snesor successively, righting reinforcing bar, the hydraulically extensible strut of adjustment lifting frame, makes the height H of lifting frame rise to [0.5L
0+ (100 ~ 200)] mm;
(5), according to the length of reinforcing bar on top board top, the height of adjustment auxiliary stand electric expansion bar, makes auxiliary stand height be 1/2 ~ 2/3 of the above reinforcing bar length of top board, stablizes to keep whole reinforcing bar;
(6), control electric operated control box, tentatively make the reinforcing bar fixed chuck on auxiliary stand on abutment sleeve and force snesor align up and down;
(7), Primary Location reinforcing bar, twisted bar, prevent the pin on reinforced bar sleeve and the steel ball in fixed muffle from coming in contact, the reinforcing bar fixed chuck of screwed in place sleeve upper and lower side, reinforcing bar is fixed on abutment sleeve, adjustment electric expansion bar, makes the reinforcing bar length of below force snesor for [0.5L
0+ (50 ~ 100)] mm, and make reinforcing bar lower end and liquid containing container bottom distance be greater than 30mm;
(8), by water inlet open, close freeing port, add water near reinforcing bar initial point cross section in organic glass vessel;
(9), accurate adjustment auxiliary stand, make the reinforcing bar fixed chuck of abutment sleeve end on auxiliary stand and the reinforcing bar fixed chuck accurate contraposition of force snesor lower end, knob abutment sleeve finely tunes its vertical position, and the reinforcing bar initial point cross section of initial alignment and liquid level are overlapped;
(10), opening electromagnetism fixes slider switch, the vertical position of lock in place sleeve;
(11), the reinforcing bar fixed chuck of force snesor lower end is tightened with fixing reinforcing bar, then folding sleeve is suspended on sleeve pipe link, finally sleeve pipe retainer plate is connected on collar supports bar by connecting link;
(12), close electromagnetism and fix slider switch, and unclamp the reinforcing bar fixed chuck of abutment sleeve upper and lower side, the weight of whole reinforcing bar is born by force snesor completely;
(13), set into water flow velocity, open TT&C system and start automatic measurement, continuous synchronization gathers liquid level and power;
(14), the liquid level data collected is converted to reinforcing bar coordinate figure along its length through the process of system by the data handling system of single-chip microcomputer, the power collected is converted to the local corrosion ratio of reinforcing bar, then draws out reinforcing bar corrosion ratio curve map along its length by drafting system;
Reinforcing bar coordinate figure is along its length: x
i=l
1-l
i, wherein, l
ibe the displacement of measuring for i-th time, l
1for the distance that the level gauging instrument when the initial point cross section of initial alignment and liquid level overlap measures;
The corrosion weight-loss ratio of i-th (i>=1) section reinforcing bar is:
wherein, F
i' for unattacked reference muscle is at x=x
itime measured power, F
ifor corrosion muscle is at x=x
itime measured power, F
i+1' for unattacked reference muscle is at x=x
i+1time measured power, F
i+1for corrosion muscle is at x=x
i+1time measured power;
Drafting system with
for coordinate figure, some remittance abroad first half section reinforcing bar corrosion ratio coordinate points along its length; With
for coordinate figure, some remittance abroad second half section reinforcing bar corrosion ratio coordinate points along its length, is connected to form corrosion ratio curve map along its length with smooth curve;
(15), when measurement length reaches a half of reinforcing bar total length, stop measuring, close TT&C system;
(16), close water inlet, open freeing port, the water in container is all drained, take off liquid containing container, shrink the hydraulic strut of lifting frame, take out reinforcing bar;
(17), by reinforcing bar reverse end for end, and reinforced bar sleeve is fixed on the reinforcing bar other end, then reinforcing bar is reinstalled on reinforcing bar fixed system, then repetitive operation (4) ~ (16) step, until the corrosion ratio of whole reinforcing bar is measured complete.
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| CN109283128A (en) * | 2017-07-19 | 2019-01-29 | 天津新星科能源技术有限公司 | A kind of corrosion monitor and preparation method thereof |
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