CN108507647B - High-precision high-stability electronic belt scale - Google Patents
High-precision high-stability electronic belt scale Download PDFInfo
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- CN108507647B CN108507647B CN201810310530.4A CN201810310530A CN108507647B CN 108507647 B CN108507647 B CN 108507647B CN 201810310530 A CN201810310530 A CN 201810310530A CN 108507647 B CN108507647 B CN 108507647B
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- 238000005303 weighing Methods 0.000 claims abstract description 93
- 230000003014 reinforcing effect Effects 0.000 claims description 5
- 229910000831 Steel Inorganic materials 0.000 claims description 4
- 239000010959 steel Substances 0.000 claims description 4
- 238000009434 installation Methods 0.000 abstract description 3
- 239000000463 material Substances 0.000 description 12
- 238000012545 processing Methods 0.000 description 9
- 230000008859 change Effects 0.000 description 8
- 230000003993 interaction Effects 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000003203 everyday effect Effects 0.000 description 1
- 206010016256 fatigue Diseases 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G11/00—Apparatus for weighing a continuous stream of material during flow; Conveyor belt weighers
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Abstract
The invention relates to a high-precision high-stability electronic belt scale which consists of a weighing unit, a scale body and a beam, wherein the weighing unit comprises a weighing idler, an idler support and a weighing sensor, the weighing idler is fixed on the idler support, the idler support is fixed on the scale body, parts, exceeding the two ends of the scale body, of the idler support are fixed on a belt conveyor frame, the weighing sensor comprises a first weighing sensor and a second weighing sensor, the first weighing sensor and the second weighing sensor are symmetrically arranged in the two ends of the beam, and the first weighing sensor and the second weighing sensor are respectively fixed in the beam through module fixing pieces; the invention has the characteristics of simple structure, convenient installation, high precision, high stability and the like.
Description
Technical Field
The invention relates to an electronic weighing device, in particular to a high-precision high-stability electronic belt scale.
Background
The electronic belt scale is ideal equipment for continuously metering bulk materials in a belt conveying system, has the advantages of simple structure, accurate weighing, stable use, convenient operation, small maintenance amount and the like, and is widely applied to industries such as metallurgy, electric power, coal, mines, ports, chemical industry, building materials and the like, however, the belt scale has a plurality of problems in the practical application process, the dynamic metering has larger errors compared with the static metering all the time, and the problems of reducing the dynamic metering errors are not solved well all the time, so the following reasons are mainly:
1. belt scale verification precision and use precision
The highest accuracy of the belt scale is 0.5% as specified by the international legal metering Organization (OIML) R50. The domestic product has proposed an accuracy grade of 0.25%, but in actual use, the accuracy is difficult to achieve, and finally in GB/T7721-2008 in 2008, the international accuracy of the rail connection is the highest accuracy grade of 0.5%;
but the belt scale has a large error compared to the accuracy of the bucket scale (approximately equivalent to 0.1%), which is unacceptable in some industries as a trade settlement. The accuracy of the belt scale should be improved;
in practice, the accuracy of measurement of 0.5% alone requires a lot of manpower and material resources, and maintenance without suffering from fatigue can be ensured every day. So that the user can put a great deal of effort on the routine maintenance of the belt scale.
2. Belt tension variation
The traditional belt balance is provided with a weighing bridge frame with a load sensor, a weighing idler on the weighing bridge frame and a weighing idler on a conveyor, and the weighing idler on the weighing bridge frame detects the weight of materials on a belt to generate an electric output signal proportional to the load of the belt. The speed sensor is directly coupled to the driven roller or to a large diameter idler roller, providing a series of pulses. The integrator receives the output signals from the load sensor and the speed sensor, electronically multiplies the belt motion and the belt load, and generates an instantaneous flow value and an integrated total weight by calculation over time. The total accumulated weight and the instantaneous flow are converted into selected engineering units, which are displayed on a display. It is to be understood that the belt scale is to accumulate the weight of the material passing through the metering section during the belt transportation process, the belt scale is mounted under the belt, the material is above the conveyor belt, and the belt is used as a transmission medium between the belt scale and the material. The belt is along with the change of material paving degree of consistency, and the change of humiture, belt tension also constantly changes, because the belt scale can't directly weigh the material, so belt tension's change has directly influenced the accuracy of material weight transfer, leads to belt scale metering error, and long-term stability can not be guaranteed.
Disclosure of Invention
The invention aims to solve the technical problem of overcoming the defects of the prior art and providing the high-precision high-stability electronic belt scale.
The technical scheme for solving the technical problems is as follows: the utility model provides a high accuracy high stability electronic belt scale, by weighing unit, balance body and crossbeam constitute, a plurality of weighing unit includes weighing idler, idler support and weighing sensor, the bearing roller of weighing is fixed on the idler support, the idler support is fixed on the balance body, and the idler support both ends surpass balance body both ends part and fix on the belt feeder frame, the balance body is by the framework structure that weighing frame and connecting plate are constituteed, every two be provided with between the bearing roller of weighing the crossbeam, the bearing roller of weighing includes bottom bearing roller and lateral part bearing roller, bottom bearing roller and bearing roller support level set up, lateral part bearing roller symmetry sets up in bottom bearing roller both ends, and lateral part bearing roller outer end upwards inclines respectively bottom bearing roller and lateral part bearing roller are last to install the belt;
the weighing sensor comprises a first weighing sensor and a second weighing sensor, the first weighing sensor and the second weighing sensor are symmetrically arranged inside two ends of the cross beam, the cross beam is fixed on the balance body, two ends of the cross beam are fixed on a belt conveyor frame through connecting plates, the cross beam is of a frame structure consisting of an upper cross beam plate, a lower cross beam plate and cross beam side plates, the first weighing sensor and the second weighing sensor are respectively fixed in the cross beam through module fixing pieces, the module fixing pieces comprise an upper module fixing piece and a lower module fixing piece, the upper module fixing piece and the lower module fixing piece are respectively and correspondingly connected with the upper cross beam plate and the lower cross beam plate through screws, two ends of the first weighing sensor are respectively connected with the upper module fixing piece and the lower module fixing piece at corresponding ends, and two ends of the second weighing sensor are respectively connected with the upper module fixing piece and the lower module fixing piece at corresponding ends.
The invention further defines the technical scheme that:
at least 2 sets of weighing cells as described above.
The two ends of the first weighing sensor are respectively and rigidly connected with the upper module fixing piece and the lower module fixing piece at the corresponding ends.
And the two ends of the second weighing sensor are respectively and flexibly connected with the upper module fixing piece and the lower module fixing piece at the corresponding ends.
The bottom of the lower beam plate is symmetrically provided with the fixing rib plates, the setting positions of the fixing rib plates are overlapped with the positions of the lower module fixing pieces at the corresponding ends, and the fixing rib plates are fixedly connected with the weighing frames at the corresponding ends through the reinforcing ribs.
The temperature sensor is symmetrically arranged in the cross beam, the field signal collector is arranged on the belt conveyor frame, the temperature sensor and the field signal collector are respectively connected with the computer integrated processor, and the field signal collector is also connected with the weighing sensor. .
The beam is made of special steel structural section bars.
The beneficial effects of the invention are as follows: the beam is made of special steel structural section bars, so that the strength of a weighing platform of the beam is ensured, and meanwhile, the sensor is more accurate in stress, good in rigidity and free of maintenance; the first weighing sensor and the second weighing sensor are symmetrically arranged in the two ends of the cross beam, wherein the two ends of the first weighing sensor are respectively and rigidly connected with the upper module fixing piece and the lower module fixing piece at the corresponding ends, the two ends of the second weighing sensor are respectively and flexibly connected with the upper module fixing piece and the lower module fixing piece at the corresponding ends, when materials run above a weighing body, the material flow instability phenomenon occurs, the flexible connection of the sensors can be used for automatically ensuring the stability of the weighing body and improving the weighing precision;
when the sensors are installed, stress deformation generated by bolt fastening, installation and the like is properly placed at the position of the flexible connection point, and the internal stress between the two sensors is eliminated automatically; the scale body consists of a scale frame and a connecting plate, the connecting position can be adjusted and fixed in a micro-scale way, the stress caused by welding and installation is reduced, and the rigidity of the scale body can be ensured;
because the temperature change is also a main factor directly influencing the tension change, the temperature sensor is used for measuring the temperature of a use site, and different stresses generated by different temperatures are compensated, so that the influence of the belt tension on the metering precision is further eliminated;
under the action of the belt tension, each weighing unit is mutually influenced, the signal collector converts the collected analog signals into digital signals and calculates the digital signals, then the digital signals are sent to the terminal computer processing system, the balance body data are analyzed by means of the powerful processing capacity of the computer, the data interaction with the field signal collector is carried out through the computer calculation, the mutual influence among the units can be eliminated, the internal force is changed, and the change of the belt tension is limited at the position of the output unit and the input unit of the array.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic view of the structure of the cross beam of the present invention;
fig. 3 is a flow chart illustrating the principles of the invention.
Detailed Description
Example 1
The embodiment provides a high-precision high-stability electronic belt scale, the structure is shown in fig. 1-2, the weighing unit comprises 2 weighing units, a scale body 2, a cross beam 3, a temperature sensor 20 and a field signal collector 21, the weighing units comprise weighing carrier rollers 1, carrier roller supports 6 and weighing sensors, the weighing carrier rollers 1 are fixed on the carrier roller supports 6, the carrier roller supports 6 are fixed on the scale body 2, the parts, exceeding the two ends of the scale body 2, of the carrier roller supports are fixed on a belt conveyor frame 9, the scale body 2 is in a frame structure formed by a scale frame 8 and a connecting plate 7, a cross beam 3 is arranged between every two weighing carrier rollers 1, each weighing carrier roller 1 comprises a bottom carrier roller 5 and a side carrier roller 4, the bottom carrier roller 5 and the carrier roller supports 6 are horizontally arranged, the side carrier rollers 4 are symmetrically arranged at the two ends of the bottom carrier roller 5, and the outer ends of the side carrier rollers 4 are respectively inclined upwards;
the weighing sensor comprises a first weighing sensor 14 and a second weighing sensor 15, the first weighing sensor 14 and the second weighing sensor 15 are symmetrically arranged in two ends of a beam 3, the beam 3 is fixed on a balance body 2, two ends of the beam 3 are fixed on a belt conveyor frame 9 through connecting plates 19, the beam 3 is made of special steel structural section bars, the beam 3 is in a frame structure formed by an upper beam plate 10, a lower beam plate 11 and a beam side plate 12, the first weighing sensor 14 and the second weighing sensor 15 are respectively fixed in the beam 3 through module fixing pieces, the module fixing pieces comprise an upper module fixing piece 13 and a lower module fixing piece 16, the upper module fixing piece 13 and the lower module fixing piece 16 are respectively and fixedly connected with the upper module fixing piece 13 and the lower module fixing piece 16 at corresponding ends through screws, two ends of the first weighing sensor 14 are respectively and flexibly connected with the upper module fixing piece 13 and the lower module fixing piece 16 at corresponding ends, the bottom of the lower beam plate 11 is provided with reinforcing ribs 17 which are symmetrically arranged at the bottoms of the beam plate 11, the upper module fixing piece 13 and the lower module fixing piece 16 are respectively fixed with reinforcing ribs 17 at corresponding positions of the corresponding ends of the weighing frame 2 through reinforcing ribs 17,
the on-site signal collector 21 is installed in the belt feeder frame, and temperature sensor 20 symmetry is installed in the crossbeam to temperature sensor 20 and on-site signal collector 21 are all connected with the computer integrated processor respectively, and on-site signal collector 21 still is connected with weighing sensor.
As shown in figure 3, when materials pass through the weighing unit, the weighing sensor converts weight signals into electric signals and transmits the electric signals to the field signal collector, the field signal collector converts collected analog signals into digital signals and calculates the digital signals, the digital signals are then transmitted to the terminal computer processing system, the balance body data are analyzed by means of powerful processing capacity of a computer and are interacted with the field signal collector, thus accurately measured data are obtained, the temperature sensor transmits the field temperature to the computer comprehensive processor, and the computer comprehensive processor compensates different stress generated by different temperatures, so that the influence of belt tension on measuring precision is further eliminated.
In the embodiment, each group of weighing sensors has a unique ID number record, experimental data are backed up in a database of a computer integrated processing system, the computer integrated processing system and a field signal collector perform data interaction in the metering process, data acquisition real-time compensation is realized, the data authenticity of each group of weighing units is improved, the computer integrated processing system analyzes the belt tension influence in real time according to the stress of each group of weighing units, so that weighing signal distortion caused by 90% belt tension change can be eliminated, the balance body data are analyzed by means of strong processing capacity of the computer, and the interaction between the units can be eliminated after the computer integrated processing system and the field signal collector perform data interaction through computer calculation, so that the change of the belt tension is limited to the positions of the output units and the input units of the array.
In addition to the embodiments described above, other embodiments of the invention are possible. All technical schemes formed by equivalent substitution or equivalent transformation fall within the protection scope of the invention.
Claims (4)
1. The utility model provides a high accuracy high stability electronic belt scale, comprises a plurality of weighing unit, balance body (2), crossbeam (3), temperature sensor (20) and on-the-spot signal collector (21), its characterized in that: the weighing unit comprises weighing carrier rollers (1), carrier roller supports (6) and weighing sensors, wherein the weighing carrier rollers (1) are fixed on the carrier roller supports (6), the carrier roller supports (6) are fixed on the balance body (2), two ends of each carrier roller support are fixed on a belt conveyor frame (9) beyond two ends of the balance body (2), each balance body (2) is of a frame structure consisting of a balance frame (8) and a connecting plate (7), each two weighing carrier rollers (1) are provided with cross beams (3), each weighing carrier roller (1) comprises a bottom carrier roller (5) and a side carrier roller (4), the bottom carrier rollers (5) and the carrier roller supports (6) are horizontally arranged, the side carrier rollers (4) are symmetrically arranged at two ends of the bottom carrier rollers (5), and the outer ends of the side carrier rollers (4) are respectively inclined upwards;
the weighing sensor comprises a first weighing sensor (14) and a second weighing sensor (15), the first weighing sensor (14) and the second weighing sensor (15) are symmetrically arranged inside two ends of the cross beam (3), the cross beam (3) is fixed on the balance body (2), two ends of the cross beam are fixed on the belt conveyor frame (9) through connecting plates (19), the cross beam (3) is of a frame structure formed by an upper cross beam plate (10), a lower cross beam plate (11) and a cross beam side plate (12), the first weighing sensor (14) and the second weighing sensor (15) are respectively fixed in the cross beam (3) through module fixing pieces, the module fixing pieces comprise an upper module fixing piece (13) and a lower module fixing piece (16), the upper module fixing piece (13) and the lower module fixing piece (16) are respectively and correspondingly connected with the upper cross beam plate (10) and the lower cross beam plate (11) through screws, and the two ends of the first weighing sensor (14) are respectively connected with the upper module fixing piece (13) and the lower module fixing piece (16) respectively and the two ends of the upper module fixing piece (13) and the lower module fixing piece (16) are respectively connected with the two module fixing pieces (13 and the two module fixing pieces respectively;
the temperature sensor (20) is symmetrically arranged in the cross beam, the field signal collector (21) is arranged on the belt conveyor frame (9), the temperature sensor (20) and the field signal collector (21) are respectively connected with the computer integrated processor, and the field signal collector (21) is also connected with the weighing sensor.
2. The high-precision high-stability electronic belt scale of claim 1, wherein: at least 2 sets of said weighing cells.
3. The high-precision high-stability electronic belt scale of claim 1, wherein: the bottom of the lower beam plate (11) is symmetrically provided with fixing rib plates (17), the setting positions of the fixing rib plates (17) are overlapped with the positions of the lower module fixing pieces (16) at the corresponding ends, and the fixing rib plates (17) are fixedly connected with the weighing frame (2) at the corresponding ends through reinforcing ribs (18).
4. The high-precision high-stability electronic belt scale of claim 1, wherein: the cross beam (3) is made of special steel structural section bars.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810310530.4A CN108507647B (en) | 2018-04-09 | 2018-04-09 | High-precision high-stability electronic belt scale |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810310530.4A CN108507647B (en) | 2018-04-09 | 2018-04-09 | High-precision high-stability electronic belt scale |
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| CN108507647A CN108507647A (en) | 2018-09-07 |
| CN108507647B true CN108507647B (en) | 2023-11-03 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109238411B (en) * | 2018-10-31 | 2024-04-09 | 徐州汇德电气科技有限公司 | Double-fulcrum high-precision electronic belt scale |
| CN109708732A (en) * | 2018-12-18 | 2019-05-03 | 滁州安瑞汇龙电子有限公司 | Belted electronic balance scale frame and its manufacturing method |
| CN110864779A (en) * | 2019-11-26 | 2020-03-06 | 徐州上达科技有限公司 | High-precision belt scale for extreme temperature environment |
| CN110864781A (en) * | 2019-11-28 | 2020-03-06 | 徐州上达科技有限公司 | High-stability high-precision electronic belt scale |
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