CN103680048A - Early warning device, system and method applied to stirring main machine and engineering machine - Google Patents
Early warning device, system and method applied to stirring main machine and engineering machine Download PDFInfo
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- CN103680048A CN103680048A CN201310698964.3A CN201310698964A CN103680048A CN 103680048 A CN103680048 A CN 103680048A CN 201310698964 A CN201310698964 A CN 201310698964A CN 103680048 A CN103680048 A CN 103680048A
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Abstract
The invention discloses an early warning device, system and method applied to a stirring main machine and the stirring main machine. The early warning method comprises the steps that the current current value of a motor of the stirring main machine is received; whether a journal sticking phenomenon of the stirring main machine occurs is judged according to the current current value, wherein in the production process of concrete, the load current difference value between the current current value and the current value under the normal production condition is calculated, and whether the journal sticking phenomenon occurs is judged according to the comparison result between the load current difference value and a load difference threshold; under an unloaded condition of the stirring main machine, the unload current difference value between the current current value and the load current value under the normal condition is calculated, and whether the journal sticking phenomenon occurs is judged according to the comparison result between the unload current difference value and an unload difference threshold. By means of the early warning device, system and method applied to the stirring main machine and the stirring main machine, automatic detection on the journal sticking condition of the stirring main machine is achieved by monitoring the current of the motor of the stirring main machine, and workers can be timely reminded to clean the stirring main machine, and therefore long-time work stoppage caused by too much raw materials stuck to a shaft of the stirring main machine is effectively avoided.
Description
Technical field
The present invention relates to the early warning technology for stirring host, particularly, relate to a kind of source of early warning for stirring host, system, method and engineering machinery.
Background technology
In producing concrete process, at raw materials such as various aggregates, powder, adjuvant and water, be put into after stirring host stirs, understand on the axle that some raw material is bonded in stirring host.After stirring host work a period of time, if stirring host is not cleared up, will cause the phenomenon of stirring host seize.So not only can seriously reduce concrete production efficiency, and can affect the serviceable life of stirring host, bring serious economic loss.
The mode of at present stirring host being cleared up is mainly regularly to arrange stirring host cleaning personnel regularly to patrol and examine, if find caking, immediately stirring host is cleared up.But, because the concrete proportioning of various labels, feeding mode, mixing time etc. are not identical, so it is not identical to be bonded in process of production the number of the raw material on the axle of stirring host yet, therefore, the regular visit of taking at present carries out cleaning can there is following shortcoming:
1, because the raw material being bonded on the axle of stirring host too much causes cleaning difficulty very large, thereby spending a large amount of time carries out shut-down (breakdown) mainteance cleaning, and this will have a strong impact on the production efficiency of mixing plant;
If 2 need to produce continuously, whether need cleaning, easily occur the situation of stirring host seize if cannot understand stirring host;
3, people is that to patrol and examine the judgement that can cause the seize of stirring host unstable.
Summary of the invention
The object of this invention is to provide a kind of source of early warning for stirring host, system, method and engineering machinery, for solving the problem to the automatic detection of the seize situation of stirring host.
To achieve these goals, the invention provides a kind of source of early warning for stirring host, this equipment comprises: receiving trap, for receiving the current current value of the motor of described stirring host; And control device, be connected with described receiving trap, be used for carrying out following at least one: in concrete production process, calculate the band live stream difference of the current value under described current current value and the normal condition of production, this band live stream difference and predefined band are carried to difference threshold to be compared, and determine according to comparative result whether described stirring host occurs seize, determining output alarm signal there is seize in the situation that; The in the situation that of described stirring host zero load, calculate the no-load current difference of described current current value and no-load current value under normal circumstances, this no-load current difference and predefined unloaded difference threshold are compared, and determine according to comparative result whether described stirring host occurs seize, determining output alarm signal there is seize in the situation that.
Correspondingly, the present invention also provides a kind of early warning system for stirring host, and this system comprises: pick-up unit, for detection of the current current value of the motor of described stirring host, and export this current value; Above-described equipment; And warning device, for receiving the alerting signal from described control device, and report to the police according to this alerting signal.
Correspondingly, the present invention also provides a kind of engineering machinery, and this project machinery comprises above-described system.
Correspondingly, the present invention also provides a kind of method for early warning for stirring host, and the method comprises: the current current value that receives the motor of described stirring host; And judge according to described current current value whether described stirring host occurs seize, at least one comprising the following steps: in concrete production process, calculate the band live stream difference of the current value under described current current value and the normal condition of production, this band live stream difference and predefined band are carried to difference threshold to be compared, and determine according to comparative result whether described stirring host occurs seize, determining output alarm signal there is seize in the situation that; The in the situation that of described stirring host zero load, calculate the no-load current difference of described current current value and no-load current value under normal circumstances, this no-load current difference and predefined unloaded difference threshold are compared, and determine according to comparative result whether described stirring host occurs seize, determining output alarm signal there is seize in the situation that.
Pass through technique scheme, the present invention is by realizing the automatic detection to the seize situation of stirring host to the monitoring of the electric current of the motor of stirring host, can remind in time staff to clear up stirring host, thus the long-time shut-down that the too much raw material of effectively having avoided boning on the axle because of stirring host causes.
Other features and advantages of the present invention partly in detail are described the embodiment subsequently.
Accompanying drawing explanation
Accompanying drawing is to be used to provide a further understanding of the present invention, and forms a part for instructions, is used from explanation the present invention, but is not construed as limiting the invention with embodiment one below.In the accompanying drawings:
Fig. 1 is the structured flowchart of the source of early warning for stirring host provided by the invention;
Fig. 2 is the concrete curve map with live stream difference of two kinds of different labels provided by the invention;
Fig. 3 is the structured flowchart of the early warning system for stirring host provided by the invention;
Fig. 4 is the hardware elementary diagram of installation detecting device provided by the invention; And
Fig. 5 is the process flow diagram of the method for early warning for stirring host provided by the invention.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is elaborated.Should be understood that, embodiment described herein only, for description and interpretation the present invention, is not limited to the present invention.
Fig. 1 is the structured flowchart of the source of early warning 10 for stirring host provided by the invention, as shown in Figure 1, this equipment comprises receiving trap 101 and control device 102, receiving trap 101 is for receiving the current current value of the motor of stirring host, control device 102 is connected with receiving trap 101, be used for carrying out following at least one: in concrete production process, the band live stream difference of the current value under the current current value that calculating receives and the normal condition of production, this band live stream difference and predefined band are carried to difference threshold to be compared, and determine according to comparative result whether stirring host occurs seize, determining output alarm signal there is seize in the situation that, the in the situation that of stirring host zero load, the no-load current difference of the current current value that calculating receives and no-load current value under normal circumstances, this no-load current difference and predefined unloaded difference threshold are compared, and determine that seize appears in stirring host, output alarm signal according to comparative result.
It should be noted that, the normal condition of production and normal condition that the present invention mentions refer to the situation that seize does not appear in stirring host.
Specifically, the electric current of the motor of stirring host determines by power and the voltage of stirring motor, and in the situation that the voltage stabilization of the motor of stirring host, electric current is directly determined by power.And the resistance that the axle of the power of the motor of stirring host stirring host when stirring produces determines, so the resistance of the axle of stirring host is larger while stirring, the electric current of motor is just larger.And for the concrete of same label, in concrete production process, the resistance that the axle of stirring host is subject to after various raw materials stir is constant, so the electric current of motor is exactly constant, that is to say that steady current is constant.In order to make result more accurate, the current value receiving in concrete production process that the present invention mentions is stable electrical flow valuve.For example, so first control device 102, before starting to carry out and determining whether stirring host occurs the step of seize, can judge that whether electric current is stable,, can judge whether current value surpasses 0.5A in the variation of 500ms.Here, judge the known technology that the whether stable process of electric current is those skilled in the art, in this, it will not go into details.
Because the concrete of different labels steady current is in process of production different, so need to set different standards to the concrete of different labels.In one embodiment, receiving trap 101 can receive the concrete label of the current stirring of stirring host, and then control device 102 is determined the current value corresponding with this label under the normal condition of production according to this label.In another embodiment, receiving trap 101 can receive the proportioning of the raw material that drops into stirring host, then control device 102 is determined the concrete label of the current stirring of stirring host according to proportioning, then determines the current value corresponding with this label under the normal condition of production according to this label.
In order to provide information more accurately to operating personnel, above-mentioned band carries difference threshold can comprise that the first band carries difference threshold and the second band carries difference threshold.In concrete production process, in the situation that being greater than the first band with live stream difference and carrying difference threshold and be less than or equal to the second band and carry difference threshold of receiving can be determined that slight seize appears in stirring host, and export corresponding alerting signal; In the situation that being greater than the second band with live stream difference and carrying difference threshold of receiving can be determined that severe seize appears in stirring host, and export corresponding alerting signal.
Certainly, above-mentioned band carries difference threshold also can only comprise that a band carries difference threshold, for example, can carry difference threshold or the second band year difference threshold for the first band, or other suitable values.In concrete production process, in the situation that receive with live stream difference, be greater than this band year difference threshold, can determine that seize appears in stirring host, and export corresponding alerting signal.
Correspondingly, above-mentioned unloaded difference threshold also can comprise the first unloaded difference threshold and the second unloaded difference threshold, the in the situation that of stirring host zero load, in the situation that the no-load current difference receiving is greater than the first unloaded difference threshold and is less than or equal to the second unloaded difference threshold, can determine that slight seize appears in stirring host, and export corresponding alerting signal; In the situation that the no-load current difference receiving is greater than the second unloaded difference threshold, can determines that severe seize appears in stirring host, and export corresponding alerting signal.
Certainly, above-mentioned unloaded difference threshold also can only comprise a unloaded difference threshold, for example, can be the first unloaded difference threshold or the second unloaded difference threshold, or other suitable values.The in the situation that of stirring host zero load, in the situation that the no-load current difference receiving is greater than this zero load difference threshold, can determine that seize appears in stirring host, and export corresponding alerting signal.
The light and heavy degree that it will be appreciated by those skilled in the art that the seize of stirring host not only can be divided into " slight seize " and " severe seize " two ranks, can set as required a plurality of ranks, to reach more accurate early warning object.
It will be appreciated by those skilled in the art that control device 102 can be set as recording at set intervals a band live stream difference to database, operating personnel can be according to the observation judge whether to clear up stirring host with the variation of live stream difference.In like manner, control device 102 can also be set as recording at set intervals a no-load current difference to database, and the operating personnel according to the observation variation of no-load current difference judge whether to clear up stirring host.
For example, Fig. 2 shows the curve map with live stream difference under the normal condition of production that the concrete of two kinds of different labels (being that label is the concrete of C30 and the concrete that label is C20) is recorded, wherein transverse axis is concrete agitator disk number, and the longitudinal axis is band live stream difference.A part for electric current difference curve map is only provided in figure, in practical operation, operating personnel can rule of thumb set and occur that the band of seize phenomenon carries difference threshold, for example, operating personnel, observe band live stream difference not shown over 2A() in the situation that, can judge that slight seize appears in stirring host, observing, band live stream difference is not shown over 4A() in the situation that, can judge that severe seize appears in stirring host.It will be appreciated by those skilled in the art that the concrete for different labels, band carries difference threshold can be identical, also can be different.
Fig. 3 is the structured flowchart of the early warning system for stirring host provided by the invention, and as shown in Figure 3, this system not only comprises the source of early warning 10 for stirring host, also comprises pick-up unit 20 and warning device 30.
Pick-up unit 20 is for detection of the current current value of the motor of stirring host, and exports this current value.This pick-up unit 20 can be arranged on the power lead of stirring host, and this pick-up unit 20 can be current transformer.As shown in Figure 4, the motor 40 of stirring host is connected on three-phase supply by contactor 50, isolating switch 60 and power lead, is current transformer shown in pick-up unit 20(figure) be arranged on this power lead.
Before using a stirring host, this pick-up unit 20 is also for detection of the current value under the concrete that goes out the no-load current value of stirring host under no-load condition (no-load current value) under normal circumstances and the various labels normal condition of production in process of production, and be stored in database, using and as control device 102, judge whether to occur the foundation of seize phenomenon.
It will be appreciated by those skilled in the art that before stirring host starts to stir, whether the proportioning that control device 102 also needs to judge raw material within error range, otherwise can not produce.This part belongs to the known technology of this area, and in this, it will not go into details.
Correspondingly, the present invention also provides a kind of engineering machinery, comprises the above-mentioned early warning system for stirring host.
Fig. 5 is the process flow diagram of the method for early warning for stirring host provided by the invention, as shown in Figure 5, first receives the current current value of the motor of stirring host, then judges that whether stirring host is in light condition.If stirring host is not light condition, in concrete production process, the band live stream difference of the current value under the current current value that calculating receives and the normal condition of production, this band live stream difference and predefined band are carried to difference threshold to be compared, and determine according to comparative result whether stirring host occurs seize, determining output alarm signal there is seize in the situation that; Otherwise, in the situation that being with live stream difference to be less than or equal to band to carry difference threshold, enter deterministic process next time.If stirring host is light condition, the current current value that calculating receives and the no-load current difference of no-load current value under normal circumstances, this no-load current difference and predefined unloaded difference threshold are compared, and determine according to comparative result whether stirring host occurs seize, determining output alarm signal there is seize in the situation that; Otherwise, in the situation that no-load current difference is less than or equal to unloaded difference threshold, enter deterministic process next time.
Fig. 5 only shows one embodiment of the present invention, and the present invention can also implement in the following manner: only, after concrete production process finishes, whether the stirring host under no-load condition is occurred to the judgement of seize.
It should be noted that, corresponding with the source of early warning for stirring host provided by the invention and system about detail and the benefit of the method for early warning for stirring host provided by the invention, in this, repeat no more.
Below describe by reference to the accompanying drawings the preferred embodiment of the present invention in detail; but; the present invention is not limited to the detail in above-mentioned embodiment; within the scope of technical conceive of the present invention; can carry out multiple simple variant to technical scheme of the present invention, these simple variant all belong to protection scope of the present invention.
By technology disclosed by the invention, operating personnel can grasp in real time stirring host and whether occur seize phenomenon, can effectively to the safety of stirring host, monitor, while having avoided making regular check on, on the axle of stirring host, bond too much concrete and the cleaning of stopping work of the large area that causes.
It should be noted that in addition each the concrete technical characterictic described in above-mentioned embodiment, in reconcilable situation, can combine by any suitable mode.For fear of unnecessary repetition, the present invention is to the explanation no longer separately of various possible array modes.
In addition, between various embodiment of the present invention, also can carry out combination in any, as long as it is without prejudice to thought of the present invention, it should be considered as content disclosed in this invention equally.
Claims (14)
1. for a source of early warning for stirring host, it is characterized in that, this equipment comprises: receiving trap, for receiving the current current value of the motor of described stirring host; And control device, be connected with described receiving trap, for carry out following at least one:
In concrete production process, calculate the band live stream difference of the current value under described current current value and the normal condition of production, this band live stream difference and predefined band are carried to difference threshold to be compared, and determine according to comparative result whether described stirring host occurs seize, determining output alarm signal there is seize in the situation that;
The in the situation that of described stirring host zero load, calculate the no-load current difference of described current current value and no-load current value under normal circumstances, this no-load current difference and predefined unloaded difference threshold are compared, and determine according to comparative result whether described stirring host occurs seize, determining output alarm signal there is seize in the situation that.
2. equipment according to claim 1, is characterized in that, described current current value is stable electrical flow valuve.
3. equipment according to claim 1, is characterized in that,
Described receiving trap is also for receiving the concrete label of the current stirring of described stirring host; And
Described control device, for according to this label, is determined the current value under the described normal condition of production, and this current value is the current value corresponding with described label.
4. equipment according to claim 1, is characterized in that,
Described receiving trap is also for receiving the proportioning of the raw material that drops into described stirring host;
Described controller also for:
According to described proportioning, determine the concrete label of the current stirring of described stirring host; And
According to this label, determine the current value under the described normal condition of production, this current value is the current value corresponding with described label.
5. according to the equipment described in any one claim in claim 1-4, it is characterized in that,
Described band carries difference threshold and comprises that the first band carries difference threshold and the second band carries difference threshold,
Described control device is used in concrete production process,
Described, be with live stream difference to be greater than that described the first band carries difference threshold and be less than or equal to described the second band and carry difference threshold in the situation that, determine that slight seize appears in described stirring host, export corresponding alerting signal; And
Described, be with live stream difference to be greater than described the second band to carry difference threshold in the situation that, determine that severe seize appears in described stirring host, exports corresponding alerting signal.
6. according to the equipment described in any one claim in claim 1-4, it is characterized in that,
Described unloaded difference threshold comprises the first unloaded difference threshold and the second unloaded difference threshold,
Described control device is used for the in the situation that of described stirring host zero load,
In the situation that described no-load current difference is greater than described the first unloaded difference threshold and is less than or equal to described the second unloaded difference threshold, determine that slight seize appears in described stirring host, export corresponding alerting signal; And
In the situation that described no-load current difference is greater than described the second unloaded difference threshold, determine that severe seize appears in described stirring host, exports corresponding alerting signal.
7. for an early warning system for stirring host, it is characterized in that, this system comprises:
Pick-up unit, for detection of the current current value of the motor of described stirring host, and exports this current value;
Equipment in claim 1 to 6 described in any one claim; And
Warning device, for receiving the alerting signal from described control device, and reports to the police according to this alerting signal.
8. an engineering machinery, is characterized in that, comprises system claimed in claim 7.
9. for a method for early warning for stirring host, it is characterized in that, the method comprises:
Receive the current current value of the motor of described stirring host; And
According to described current current value, judge whether described stirring host occurs seize, at least one comprising the following steps:
In concrete production process, calculate the band live stream difference of the current value under described current current value and the normal condition of production, this band live stream difference and predefined band are carried to difference threshold to be compared, and determine according to comparative result whether described stirring host occurs seize, determining output alarm signal there is seize in the situation that;
The in the situation that of described stirring host zero load, calculate the no-load current difference of described current current value and no-load current value under normal circumstances, this no-load current difference and predefined unloaded difference threshold are compared, and determine according to comparative result whether described stirring host occurs seize, determining output alarm signal there is seize in the situation that.
10. method according to claim 9, is characterized in that, described current current value is stable electrical flow valuve.
11. methods according to claim 9, is characterized in that, the method also comprises:
Receive the concrete label of the current stirring of described stirring host; And
According to this label, determine the current value under the described normal condition of production, this current value is the current value corresponding with described label.
12. methods according to claim 9, is characterized in that, the method also comprises:
Receive the proportioning of the raw material that drops into described stirring host;
According to described proportioning, determine the concrete label of the current stirring of described stirring host; And
According to this label, determine the current value under the described normal condition of production, this current value is the current value corresponding with described label.
13. according to the method described in any one claim in claim 9-12, it is characterized in that, described band carries difference threshold and comprises that the first band carries difference threshold and the second band carries difference threshold, in concrete production process,
Described, be with live stream difference to be greater than that described the first band carries difference threshold and be less than or equal to described the second band and carry difference threshold in the situation that, determine that slight seize appears in described stirring host, export corresponding alerting signal; And
Described, be with live stream difference to be greater than described the second band to carry difference threshold in the situation that, determine that severe seize appears in described stirring host, exports corresponding alerting signal.
14. according to the method described in any one claim in claim 9-12, it is characterized in that, described unloaded difference threshold comprises the first unloaded difference threshold and the second unloaded difference threshold, the in the situation that of described stirring host zero load,
In the situation that described no-load current difference is greater than described the first unloaded difference threshold and is less than or equal to described the second unloaded difference threshold, determine that slight seize appears in described stirring host, export corresponding alerting signal; And
In the situation that described no-load current difference is greater than described the second unloaded difference threshold, determine that severe seize appears in described stirring host, exports corresponding alerting signal.
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| CN110037577A (en) * | 2019-04-28 | 2019-07-23 | 九阳股份有限公司 | A kind of disturbing flow device recognition methods of food processor |
| CN113521450A (en) * | 2021-07-14 | 2021-10-22 | 巨翊科技（上海）有限公司 | Method for automatically detecting no-load current and correcting current alarm threshold |
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Effective date of registration: 20210826 Address after: 415907 No.1 Zhonglian Avenue, Huangfu neighborhood committee, Hanshou high tech Industrial Park, Changde City, Hunan Province Patentee after: HUNAN ZHONGLIAN ZHONGKE CONCRETE MACHINERY STATION EQUIPMENT Co.,Ltd. Address before: 410013 No. 361 South silver basin, Changsha, Hunan, Yuelu District Patentee before: Zoomlion Heavy Industry Science and Technology Co.,Ltd. |
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