CN101748678B - Asphalt blending station and screening precision control method and device thereof - Google Patents
Asphalt blending station and screening precision control method and device thereof Download PDFInfo
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- CN101748678B CN101748678B CN2010101043260A CN201010104326A CN101748678B CN 101748678 B CN101748678 B CN 101748678B CN 2010101043260 A CN2010101043260 A CN 2010101043260A CN 201010104326 A CN201010104326 A CN 201010104326A CN 101748678 B CN101748678 B CN 101748678B
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Abstract
The invention discloses a screening precision control method, which is carried out by that: a) grain diameter parameters of aggregate in branch bins of hot aggregate bins are sequentially obtained; b) whether the judgment result of the current screening precision is out of tolerance is obtained by taking whether the rain diameter parameters of aggregate in branch bins of hot aggregate bins are inthe corresponding presetting parameter range respectively as the judgment condition; c) if the judgment result represents that the current screening precision is out of tolerance, inspection is carried out by machine halt; on the basis, the invention provides a screening precision control device and an asphalt blending station with the device; the asphalt blending station can control the screening precision in a real-time manner according to different working conditions; when the grain diameter of the aggregate is deviated from the presetting parameter range of the corresponding branch bin, machine-halt inspection is carried out, so as to effectively control the grain diameter precision of the output aggregate from the hot aggregate bins and effectively control the rejection rate of the finished products in the asphalt blending station.
Description
Technical field
The present invention relates to the bituminous mixture stirring technique, be specifically related to a kind of asphalt blending station and screening precision control method thereof and device.
Background technology
Asphaltic road-mix surface course is as a kind of road structure form, and is comfortable with its driving, noise is low, be easy to advantages such as maintenance, is widely used in the highway construction, especially high-grade highway construction.At present, asphalt blending station is as a complete set of equipment of producing bituminous mixture, and widespread usage is in the road construction work construction.
Particularly, asphalt blending station can be divided into according to its technological process and forces two kinds of batch (-type) and continous ways; Wherein, force the batch (-type) asphalt blending station can guarantee the grating of aggregate, the ratio of aggregate and pitch all can reach higher precision.In addition, also be easy to change at any time as required grading of aggregate and bitumen aggregate ratio, the quality of asphalt mixtures height of making of mixing can satisfy the requirement of various road constructions.
As everyone knows, than the continuous asphalt blending station, force the batch (-type) asphalt blending station why to have above-mentioned advantage, its basic reason is to have the regrading function of aggregate; Behind regrading, carry out accurate weighing by classification again, thereby guarantee the grading of aggregate of degree of precision.
See also Fig. 1, this figure is the matching relationship schematic diagram of vibrosieve and hot aggregate bin in the prior art.
Obviously, the screening accuracy is the basis that guarantees its weighing precision and mixing uniformity.In the practical work process, because the working environment of vibrosieve is comparatively abominable, its any one parts break down all can influence the accuracy of its screening; Such as, faults such as screens break, vibrating spring inefficacy appear in vibrosieve.Its screening accuracy will can not get ensureing; Yet,, will directly influence the percent defective of finished product material, and then cause tremendous loss to the user in case the fault of influence screening accuracy occurs.With 3000 type asphalt blending stations is that example is carried out estimation roughly, and the loss of every day is about about 700,000.
In view of this, demand urgently carrying out Aided Design, influence the percent defective of finished product material to avoid equipment fault at the screening accuracy of existing asphalt blending station.
Summary of the invention
At above-mentioned defective, the technical problem that the present invention solves is, a kind of method of screening precision capable of on-line is provided, so that in time carry out shutdown inspection according to accuracy error, thus can effectively control the precision of aggregate screening in the practical work process.On this basis, the present invention also provides a kind of screening precision control device and the asphalt blending station with this control device.
Screening precision control method provided by the invention, carry out according to following step:
A) obtain the particle size parameters of aggregate in each hot aggregate bin branch storehouse successively;
B) whether in corresponding parameter preset scope, be Rule of judgment respectively with the particle size parameters of aggregate in each hot aggregate bin branch storehouse, obtain the whether overproof judged result of current screening precision;
C) it is overproof to characterize current screening precision as if judged result, then shutdown inspection.
Preferably, obtain the aggregate size parameter of each bottom, hot aggregate bin branch storehouse in the step a) successively.
Screening precision control device provided by the invention comprises some take-off valves, aggregate analyzer and controller; Wherein, described some take-off valves are respectively applied for opening and closing of path between the charging aperture of control discharging opening in each hot aggregate bin branch storehouse and aggregate analyzer; Described aggregate analyzer is used to detect the particle diameter of aggregate, and exports this particle size parameters signal; Described controller comprises signal receiving unit, memory cell, judging unit and signal output unit; Described signal receiving unit is used to receive described particle size parameters signal; Described memory cell is used for storage and each hot aggregate bin branch storehouse corresponding particle diameter parameter preset value range; Described judging unit is used for judging that the particle size parameters of each hot aggregate bin branch storehouse aggregate is whether respectively in corresponding parameter preset scope; Described signal output unit is exported the control signal of shutdown inspection when current screening precision is overproof.
Preferably, described take-off valve comprises valve cylinder body and valve plate; Wherein, the both ends open of described valve cylinder body is respectively arranged with adpting flange; Described valve plate is built in the described valve cylinder body; Described valve plate and valve cylinder body are rotationally connected, so that change between opening and closed condition.
Preferably, the outer of described valve plate is symmetrically arranged with radially-protruding drive-connecting shaft, has the pivoted hole with the corresponding setting of described drive-connecting shaft on the inwall of described valve cylinder body.
Preferably, described take-off valve also comprises drive unit, and its output block is connected with described valve plate, so that described valve plate rotates with respect to the valve cylinder body.
Preferably, described drive unit is specially motor.
Preferably, the detection discharging opening that divides the storehouse at each hot aggregate bin is to path between the charging aperture of aggregate analyzer, and the level height of upstream side is higher than the level height in downstream successively.
Asphalt blending station provided by the invention comprises hot aggregate bin and foregoing screening precision control device with some minutes storehouses.
Preferably, detect the bottom that discharging opening lays respectively at each hot aggregate bin branch storehouse.
Use bituminous mixing plant of the present invention, can carry out the control of screening precision in real time according to different operating modes; When aggregate size departs from the parameter preset scope in corresponding minute storehouse, promptly carry out shutdown inspection, effectively controlled particle diameter precision through aggregate that hot aggregate bin is exported; Thereby can effectively control the finished product material percent defective of bituminous mixing plant.
In preferred version of the present invention, adopt the unlatching of Motor Control take-off valve or close, have reasonable in design, characteristics that job stability is high.Can control the open operation with the take-off valve of the corresponding setting in storehouse in to be detected minute in the real work as required, operability is good.
In another preferred version of the present invention, the detection discharging opening that divides the storehouse at each hot aggregate bin is to path between the charging aperture of aggregate analyzer, and the level height of upstream side is higher than the level height in downstream successively.So design makes the aggregate in corresponding minute storehouse to enter the aggregate analyzer comparatively smoothly and to detect, and then to improve job stability of the present invention under the effect of deadweight.
Screening precision control method provided by the invention and device are applicable to any type of pitch prill blending station, are specially adapted to force the batch (-type) asphalt blending station.
Description of drawings
Fig. 1 is a kind of vibrosieve of existing pressure batch (-type) asphalt blending station and the schematic diagram of hot aggregate bin matching relationship;
Fig. 2 is the working state schematic representation of the control device of screening precision described in the specific embodiment;
Fig. 3 is the A-A sectional view of Fig. 2;
Fig. 4 shows the unit block diagram of controller described in the specific embodiment;
Fig. 5 is the overall structure schematic diagram of the described take-off valve of the specific embodiment, is opening shown in the figure;
Fig. 6 shows the take-off valve that is in closed condition;
Fig. 7 is the FB(flow block) of screening precision control method described in the specific embodiment.
Among Fig. 2-Fig. 7:
Screening precision control device 10, hot aggregate bin 20, discharging opening 21;
Take-off valve 1, valve cylinder body 11, adpting flange 111, valve plate 12, drive unit 13, aggregate analyzer 2, aggregate pipe 3, controller 4, signal receiving unit 41, memory cell 42, judging unit 43, signal output unit 44.
The specific embodiment
Based on existing aggregate screening operating principle of forcing the batch (-type) bituminous mixing plant, the present invention proposes a kind of screening control technology, the bituminous mixing plant of using this technology can onlinely carry out the particle diameter detection of aggregate in each hot aggregate bin branch storehouse, thereby realizes carrying out screening precision control in real time according to different operating modes; When aggregate size departs from the parameter preset scope in corresponding minute storehouse, promptly carry out shutdown inspection, effectively controlled particle diameter precision through aggregate that hot aggregate bin is exported.
Specify present embodiment below in conjunction with Figure of description.
See also Fig. 2 and Fig. 3, wherein, Fig. 2 is the working state schematic representation of the described screening precision control device of present embodiment, and Fig. 3 is the A-A sectional view of Fig. 2.Parts among the figure shown in the dotted line are the hot aggregate bin 20 with a plurality of minutes storehouses.
This screening precision control device 10 comprises some take-off valves 1, aggregate analyzer 2 and controller (not shown); Wherein, some take-off valves 1 are respectively applied for opening and closing of path between the charging aperture of discharging opening 21 and aggregate analyzer 2 in each hot aggregate bin branch storehouse of control, and as shown in Figure 2, detection discharging opening 21 lays respectively at the bottom in each 20 fens storehouse of hot aggregate bin.
Orientation along 20 fens storehouses of hot aggregate bin is provided with an aggregate pipe 3, and an end of this aggregate pipe 3 is communicated with the charging aperture of aggregate analyzer 2, and the outlet of each take-off valve 1 is communicated with aggregate pipe 3 respectively, import is communicated with corresponding branch storehouse.In the practical operation, open with to be detected minute corresponding take-off valve 1 in storehouse, close other take-off valves, can with this minute the storehouse aggregate export to aggregate analyzer 2 and carry out particle diameter and detect.
Wherein, aggregate analyzer 2 is used to detect the particle diameter of aggregate, and exports this particle size parameters signal; Need to prove that this aggregate analyzer 2 can be selected existing commercially available prod for use, such as, the online grain diameter analyzer that skill Instr Ltd. of U.S. section produces, product type: POLA 3000; According to the particle diameter average that obtained of sampling repeatedly once or, output particle size parameters signal is to controller.Certainly, also can make by oneself according to actual needs, all can as long as can satisfy the basic need that detects aggregate size and export the particle size parameters signal.Because the technician in ability field can realize fully based on prior art, so this paper repeats no more.
The major function of controller 4 is prestore relevant parameter, particle size parameters signal that reception and processing detected and according to judged result output control signal.See also Fig. 4, the figure shows the unit block diagram of controller, this controller comprises signal receiving unit 41, memory cell 42, judging unit 43 and signal output unit 44.
Wherein, signal receiving unit 41 is used to receive the aggregate analyzer 2 particle size parameters signal that obtains that detects; Memory cell 42 is used to store the parameter preset value range, because each of hot aggregate bin 20 divides the theoretical particle diameter in storehouse different respectively, so storage divides the storehouse corresponding default particle size parameters value range with each hot aggregate bin respectively in the memory cell 42; Judging unit 43 is used to judge that the relevant particle size parameter is whether in corresponding parameter preset scope; If current particle size parameters departs from corresponding parameter preset scope, then, the control signal of signal output unit 44 output shutdown inspections.
In addition, the basic role of the take-off valve 1 that is adopted in this programme is according to detecting the needs unlatching or closing corresponding minute storehouse to the path between the aggregate analyzer 2.Such as, carry out aggregate size at 1# branch storehouse and detect, then open the take-off valve that is communicated with 1# branch storehouse, close all the other n-1 take-off valve, thereby guarantee that current operation only detects at the aggregate in the 1# branch storehouse.
In theory, the composition of take-off valve 1 and annexation should not limit the application's protection domain, as long as the needs that satisfy aforementioned basic function are all in its protection domain.Certainly, this paper provides a kind of reasonable in design, take-off valve that operability is good, specifically sees also Fig. 5, and this figure is the overall structure schematic diagram of the described take-off valve of present embodiment, and take-off valve is in opening shown in the figure.
As shown in Figure 5, this take-off valve 1 comprises valve cylinder body 11, valve plate 12 and drive unit 13; Wherein, the both ends open of valve cylinder body 11 is respectively arranged with adpting flange 111, so that reliable annexation is realized with the adjacent tubes parts respectively in the import and export two ends of take-off valve 1.In fact, valve cylinder body 11 also can adopt welding or non-disconnectable formula such as bonding to connect, and certainly, although the manufacturing cost that non-disconnectable formula connects is lower, obviously it is easier to assembling not as the structure design that adopts adpting flange and adjusts.
Wherein, valve plate 12 is built in the valve cylinder body 11, and valve plate 12 is rotationally connected with valve cylinder body 11, so that change between opening and closed condition; As shown in Figure 5, when valve plate 12 (plate face) and valve cylinder body 11 axis parallels, take-off valve 1 is in opening; As shown in Figure 6, after valve plate 12 rotated, when the axial line of its plate face and valve cylinder body 11 was vertical, take-off valve 1 was in closed condition.
The relation of being rotationally connected between valve body 12 and the valve cylinder body 11 is specially: the outer of valve plate 12 is symmetrically arranged with radially-protruding drive-connecting shaft 121, has the pivoted hole 112 with drive-connecting shaft 121 corresponding settings on the inwall of valve cylinder body 11.Need to prove that cooperating between the drive-connecting shaft 121 that a side only is shown among the figure and the pivoted hole 112, the drive-connecting shaft of opposite side is identical with it with the cooperation between the pivoted hole, so not completely shown.
In addition, to path between the charging aperture of aggregate analyzer 2, the level height of upstream side is higher than the level height in downstream successively at the detection discharging opening in 20 fens storehouses of each hot aggregate bin; In fact, the level height of upstream side is higher than the control of the level height in downstream successively, can control in two sub-sections, and the one, aggregate pipe 3 is obliquely installed, as shown in Figure 2; Another is that the pipeline at take-off valve 1 place is obliquely installed, as shown in Figure 3.
Based on aforementioned control device, below in conjunction with FB(flow block) summary screening precision control method shown in Figure 7.This method is mainly carried out according to following three steps:
A) obtain the particle size parameters of aggregate in each hot aggregate bin branch storehouse successively; Preferably, obtain the aggregate size parameter of hot aggregate bin bottom.
B) whether in corresponding parameter preset scope, be Rule of judgment respectively with the particle size parameters of aggregate in each hot aggregate bin branch storehouse, obtain the whether overproof judged result of current screening precision;
C) it is overproof to characterize current screening precision as if judged result, then shutdown inspection.
Present embodiment also provides a kind of asphalt blending station (figure does not show), and it comprises hot aggregate bin and the foregoing screening precision control device with some minutes storehouses; The controller of screening precision control device can be integrated in long-range central control system, for each take-off valve and aggregate analyzer provide power supply, and controls its operation.So design makes control operation simple more, quick.Need operate successively at each minute storehouse during concrete the execution, its control flow is:
(1), central control system provides the control instruction in 1# hot aggregate bin branch storehouse; the 1# take-off valve is opened; the aggregate analyzer starts; the hot aggregate of 1# enters the aggregate analyzer by take-off valve, aggregate pipe; analyze the back data and feed back to controller, and with these data and the contrast of default data, as deviation appears; then send instruction, shutdown inspection.
(2) if step (1) zero deflection; central control system provides the control instruction in 2# hot aggregate bin branch storehouse; the 2# take-off valve is opened; the aggregate analyzer starts, and the hot aggregate of 2# enters the aggregate analyzer by take-off valve, aggregate pipe, analyzes the back data and feeds back to controller; and with these data and the data contrast that sets; as deviation appears, then send instruction, shutdown inspection.
……
(n) if step (n-1) zero deflection; central control system provides the control instruction in n# hot aggregate bin branch storehouse; the n# take-off valve is opened; the aggregate analyzer starts, and the hot aggregate of n# enters the aggregate analyzer by take-off valve, aggregate pipe, analyzes the back data and feeds back to controller; and with these data and the data contrast that sets; as deviation appears, then send instruction, shutdown inspection.So far, finish a control flow.
Be understandable that the agent structure and the prior art of the described asphalt blending station of this programme are basic identical, so this paper is not specifically addressed.Screening precision control device provided by the invention and method promptly can be applied to force the batch (-type) asphalt blending station, also can be applied to the continuous asphalt blending station, as long as use design philosophy of the present invention all in the application's protection domain.
The above only is a preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (10)
1. screening precision control method is characterized in that, this method is carried out according to following step:
A) obtain the particle size parameters of aggregate in each hot aggregate bin branch storehouse successively;
B) whether in corresponding parameter preset scope, be Rule of judgment respectively with the particle size parameters of aggregate in each hot aggregate bin branch storehouse, obtain the whether overproof judged result of current screening precision;
C) it is overproof to characterize current screening precision as if judged result, then shutdown inspection.
2. screening precision control method according to claim 1 is characterized in that, obtains the aggregate size parameter of each bottom, hot aggregate bin branch storehouse in the step a) successively.
3. the screening precision control device is characterized in that, comprising:
Some take-off valves are used for controlling respectively opening and closing of path between the charging aperture of the detection discharging opening in each hot aggregate bin branch storehouse and aggregate analyzer;
The aggregate analyzer is used to detect the particle diameter of aggregate, and exports this particle size parameters signal; With
Controller comprises:
Signal receiving unit is used to receive described particle size parameters signal;
Memory cell is used for storage and each hot aggregate bin branch storehouse corresponding particle diameter parameter preset value range;
Judging unit, whether the particle size parameters that is used for judging each hot aggregate bin branch storehouse aggregate is respectively in corresponding parameter preset scope; With
Signal output unit, when current screening precision is overproof, the control signal of output shutdown inspection.
4. screening precision control device according to claim 3 is characterized in that, described take-off valve comprises:
The valve cylinder body, its both ends open is respectively arranged with adpting flange; With
Valve plate is built in the described valve cylinder body; And
Described valve plate and valve cylinder body are rotationally connected, so that change between opening and closed condition.
5. screening precision control device according to claim 4 is characterized in that the outer of described valve plate is symmetrically arranged with radially-protruding drive-connecting shaft, has the pivoted hole with the corresponding setting of described drive-connecting shaft on the inwall of described valve cylinder body.
6. according to claim 4 or 5 described screening precision control device, it is characterized in that described take-off valve also comprises drive unit, its output block is connected with described valve plate, so that described valve plate rotates with respect to the valve cylinder body.
7. screening precision control device according to claim 6 is characterized in that described drive unit is specially motor.
8. screening precision control device according to claim 7 is characterized in that, the detection discharging opening that divides the storehouse at each hot aggregate bin is to path between the charging aperture of aggregate analyzer, and the level height of upstream side is higher than the level height in downstream successively.
9. asphalt blending station comprises the hot aggregate bin with some minutes storehouses, it is characterized in that, also comprises as each described screening precision control device among the claim 3-8.
10. asphalt blending station according to claim 9 is characterized in that, detects the bottom that discharging opening lays respectively at each hot aggregate bin branch storehouse.
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| CN2010101043260A CN101748678B (en) | 2010-01-25 | 2010-01-25 | Asphalt blending station and screening precision control method and device thereof |
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| CN2010101043260A CN101748678B (en) | 2010-01-25 | 2010-01-25 | Asphalt blending station and screening precision control method and device thereof |
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Effective date of registration: 20200508 Address after: 221000 No.10 tuolanshan Road, zone 1, Xuzhou Economic Development Zone, Xuzhou City, Jiangsu Province Patentee after: XUZHOU XCMG MAINTENANCE MACHINERY Co.,Ltd. Address before: 221004 No. 8, Mount Blue Road, Xuzhou Economic Development Zone, Jiangsu, China Patentee before: XCMG CONSTRUCTION MACHINERY CO., LTD. SCIENCE AND TECHNOLOGY BRANCH |
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