CN203667488U - Belt conveyer control device - Google Patents
Belt conveyer control device Download PDFInfo
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- CN203667488U CN203667488U CN201320835980.8U CN201320835980U CN203667488U CN 203667488 U CN203667488 U CN 203667488U CN 201320835980 U CN201320835980 U CN 201320835980U CN 203667488 U CN203667488 U CN 203667488U
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- belt conveyer
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- 239000000463 material Substances 0.000 claims abstract description 16
- 238000005303 weighing Methods 0.000 abstract 3
- 230000005855 radiation Effects 0.000 abstract 1
- 239000003245 coal Substances 0.000 description 6
- 238000009434 installation Methods 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000003287 optical effect Effects 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000009499 grossing Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 235000012054 meals Nutrition 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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Abstract
The utility model discloses a belt conveyer control device which comprises a laser belt weighing device, a controller and a frequency converter, wherein the laser belt weighing device is used for measuring flow data of materials on a belt conveyer, the controller outputs control signals according to the flow data and is connected with the laser belt weighing device through a 4-20mA interface, the frequency converter controls the operation speed of the belt conveyer according to the control signals from the controller, the frequency converter is connected with the controller through a network interface, and the power output end of the frequency converter is connected with a motor of the belt conveyer. By means of the belt conveyer control device, use of a radiation source is avoided, cost is lowered, and besides control precision and instantaneity are improved.
Description
Technical field
The utility model relates to transport field under coal mine, especially relates to a kind of belt control device.
Background technology
In recent years, along with the develop rapidly of China's coal-mine production and freight-transport capacity, belt feeder load is increasing, requires also more and more higher to job security, reliability and economy.Realize the real-time traffic control of material on load-transfer device, be the equilibrium of guarantee output, prevent a kind of effective means that belt is fully loaded.
At present, under coal mine, in transport field, most widely used belt control device mainly contains following two kinds:
The first device is to utilize belted electronic balance to carry out controlled reset, thereby maintains the stability of flow of belt feeder.First the controlled reset for belt feeder for belted electronic balance, maximum limitation is that belted electronic balance exists " belt effect ", the i.e. impact of belt oneself factor on result of a measurement in testing process, comprising: belt tension, belt rigidity, belt deadweight, belt inclination angle, belt wearing and tearing etc.At coal industry, due to reasons such as belt speed are fast, flow is large, belt tension is large, field condition is complicated, " the belt effect " of belted electronic balance is especially obvious.Secondly, the scale frame of belted electronic balance is huge, heavy, when installation, need to reinforce the support of conveyer, and installation requirement is high.Again, belted electronic balance belongs to contact type measurement, for ensureing precision, needs to carry out belt deviation rectifying, carrying roller calibration etc. in use, needs operator meticulously to safeguard and use link code, chain code adjustment, safeguards, staking-out work amount is very big.In actual use, particularly under coal mine, this site environment complexity, mass flow are large, belt vibrations are large, dust is many, electromagnetic interference is applied large in the situation that, often can not reach nominal accuracy, cannot realize real-time feedback control accurately.
The second device is to utilize controlled nucleon operated belt conveyor scale to carry out controlled reset.This device limitation also a lot.First, the use of active source, management and rules for storage are very strict, need to drop into a large amount of man power and materials and supervise, and not only expense is high, and have very large potential safety hazard.Secondly, because the principle of controlled nucleon operated belt conveyor scale is that strength retrogression's situation of utilizing ray to penetrate behind coal seam detects, so easily produce shape error, the coal of same weight in the time detecting, in the time of cross sectional shape, raw meal particle size difference, the result of a measurement of controlled nucleon operated belt conveyor scale has very large difference.Again, due to the randomness of core measurement, go for more stable take off data, often through needing the smoothing processing of long period, the real-time of data is poor, when in the situation for real-time feedback control, may occur to respond in time, the situation of control hysteresis, even may cause system to be shaken, control and lost efficacy.
Utility model content
In view of this, the utility model provides a kind of containing active source, accuracy rate is high, cost is low, real-time belt control device.
Described belt control device comprises:
Be used for the laser belt conveyer scale of the data on flows of measuring the material on belt feeder;
According to the controller of described data on flows output control signal, described controller is connected with described laser belt conveyer scale by 4-20mA interface;
According to the frequency converter of the running velocity of the control signal control belt feeder from described controller, described frequency converter is connected with described controller by network interface, and the output port of power source of described frequency converter is connected with the motor of described belt feeder.
Further, described laser belt conveyer scale comprises:
Image acquisition device, described image acquisition device is arranged on the top of belt feeder;
Laser, described laser is arranged on the top of belt feeder.
Further, described laser belt conveyer scale also comprises:
Speed sensor, described speed sensor is arranged on the below of described belt feeder.
Further, described controller is PLC controller, and described PLC controller is connected with described laser belt conveyer scale by 4-20mA interface.
Further, described controller is PID controller, and described PID controller is connected with described laser belt conveyer scale by 4-20mA interface.
Further, described frequency converter is connected with described controller by RJ45 network interface.
Adopt after the utility model belt control device, not only avoided active source use, reduced cost, but also improved accuracy rate and the real-time controlled.
Brief description of the drawings
To describe preferred embodiment in the utility model in detail by accompanying drawing below, will contribute to understand the purpose of this utility model and advantage, wherein:
Fig. 1 is the structural representation of the utility model belt control device;
Fig. 2 is the part parts installation site schematic diagram of the laser belt conveyer scale of the utility model belt control device;
Fig. 3 is the system model that the utility model belt control device preferred embodiment carries out controlled reset.
Detailed description of the invention
Fig. 1 is the structural representation of the utility model belt control device.As shown in Figure 1, described belt control device comprises laser belt conveyer scale 2, controller 3 and frequency converter 4.Described laser belt conveyer scale 2 is for measuring the data on flows of the material 6 on belt feeder 1, and data are sent to described controller 3; Described controller 3 receives the data on flows from described laser belt conveyer scale 2, outputs a control signal to described frequency converter 4 according to described data on flows; Described frequency converter 4 receives the described control signal from described controller 3, turns round, thereby control the flow of material 6 on described belt feeder 1 according to the motor 5 of belt feeder 1 described in described control signal control.Described controller 3 is connected with described laser belt conveyer scale 2 by 4-20mA interface; Described frequency converter 4 is connected with described controller 3 by network interface, and the output port of power source of described frequency converter 4 is connected with the motor 5 of described belt feeder 1.
Fig. 2 is the part parts installation site schematic diagram of the laser belt conveyer scale of the utility model belt control device, as shown in Figure 2, the image acquisition device 21 of described laser belt conveyer scale 2 is arranged on the top of belt feeder 1, and the laser 22 of described laser belt conveyer scale 2 is arranged on the top of belt feeder 1.The speed sensor 23 of described laser belt conveyer scale 2 is arranged on the below of described belt feeder 1.
Material described in the laser directive that described laser 22 sends on belt feeder 1 forms optical cross-section on described material, and described image acquisition device gathers described optical cross-section data, the running velocity data of the described belt feeder 1 that described speed sensor 23 gathers.Described laser belt conveyer scale 2 outputs to described controller 3 by the data on flows of described material (comprising: optical cross-section data and described speed data) by 4-20mA signal.Described controller 3 accesses looped network by DH+, and described frequency converter 4 receives the data from described controller 3 by RJ45 network interface.
Preferably, described data on flows also comprises the density data of the described material 6 that described laser belt conveyer scale 2 demarcates.
Preferably, described controller 3 can be elected PLC controller as, and described PLC controller is connected with described laser belt conveyer scale by 4-20mA interface.
Preferably, described controller 3 can be elected PID controller as, and described PID controller is connected with described laser belt conveyer scale by 4-20mA interface.
In the time that belt control device described in the utility model carries out belt feeder flow control, whole control system can be regarded a system being made up of discrete-time signal as.Suppose that in process point, the weight of material flow in a certain second is G (t), in it and this second, by the interior average bulk density ρ of material (t) of material sectional area aviation value S (t), this second of process point, and the relation of belt feeder average velociity V (t) in this second is as follows:
G(t)=S(t)×ρ(t)×V(t)
Material secure flows value is set in described controller 3, compares with actual flow value G (t), realize the belt speed control to belt feeder 1 according to comparison operation result, thereby control the mass flow of belt feeder 1.
In actual applications, installing and measuring position and requiring of described laser belt conveyer scale 2 often has distance between flow pulsation-free process point, supposes that this segment distance is L, and between two positions, having time lag is that T=L/v(v is the average velociity in this period).In fact, the running velocity of described belt feeder 1 is not generally uniform movement, and average velociity in the time period is also not easy to obtain, and therefore can carry out in another way: for the testing result of each second, create an array.First element of array is the average cross-section S in first second, and second element of array is the average velociity v in first second, and the 3rd element of array is from first second, the integration of all speed.The average cross-section of supposing t0 second is that S0, speed are v0; The average interfacial agents of t1 second is that S1, speed are v1, by that analogy.Just can judge t0 material second by rate integrating in array and whether arrive detection position compared with L.
Set up a feedback system model under basic discrete time according to this hypothesis, Fig. 3 is the system model that the utility model belt control device preferred embodiment carries out controlled reset, wherein: feedback system input V(t-1) be the average velociity of putting a second detection time; V (t) is the speed of this second after regulating; Feedback system output G (t) regulates the flow value of latter a second; G is target flow value; Feedback network system function is (G (t)-G)/S (t-x).
According to the feedback control model shown in Fig. 3, that utilizes the difference of present flow rate and given flow and current sectional area is compared to feedback foundation, the controlled reset of belt feeder running velocity shown in carrying out.
Although the utility model illustrates and describes with reference to its preferred embodiment, but will be understood by those skilled in the art that, in the case of not departing from the spirit and scope of the present utility model that the appended claims limit, can carry out the various changes of form and details.
Claims (6)
1. a belt control device, is characterized in that, comprising:
Be used for the laser belt conveyer scale of the data on flows of measuring the material on belt feeder;
According to the controller of described data on flows output control signal, described controller is connected with described laser belt conveyer scale by 4-20mA interface;
According to the frequency converter of the running velocity of the control signal control belt feeder from described controller, described frequency converter is connected with described controller by network interface, and the output port of power source of described frequency converter is connected with the motor of described belt feeder.
2. belt control device according to claim 1, is characterized in that, described laser belt conveyer scale comprises:
Image acquisition device, described image acquisition device is arranged on the top of belt feeder;
Laser, described laser is arranged on the top of belt feeder.
3. belt control device according to claim 2, is characterized in that, described laser belt conveyer scale also comprises:
Speed sensor, described speed sensor is arranged on the below of described belt feeder.
4. belt control device according to claim 1, is characterized in that, described controller is PLC controller, and described PLC controller is connected with described laser belt conveyer scale by 4-20mA interface.
5. belt control device according to claim 1, is characterized in that, described controller is PID controller, and described PID controller is connected with described laser belt conveyer scale by 4-20mA interface.
6. belt control device according to claim 1, is characterized in that, described frequency converter is connected with described controller by RJ45 network interface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320835980.8U CN203667488U (en) | 2013-12-17 | 2013-12-17 | Belt conveyer control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320835980.8U CN203667488U (en) | 2013-12-17 | 2013-12-17 | Belt conveyer control device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203667488U true CN203667488U (en) | 2014-06-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320835980.8U Expired - Lifetime CN203667488U (en) | 2013-12-17 | 2013-12-17 | Belt conveyer control device |
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| CN (1) | CN203667488U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107934445A (en) * | 2017-12-08 | 2018-04-20 | 浙江湖州中盟智能科技有限公司 | Belt conveyor |
| CN108069222A (en) * | 2016-11-16 | 2018-05-25 | 江苏鼎盛重工有限公司 | A kind of multi-stage, belt machine speed control system |
-
2013
- 2013-12-17 CN CN201320835980.8U patent/CN203667488U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108069222A (en) * | 2016-11-16 | 2018-05-25 | 江苏鼎盛重工有限公司 | A kind of multi-stage, belt machine speed control system |
| CN107934445A (en) * | 2017-12-08 | 2018-04-20 | 浙江湖州中盟智能科技有限公司 | Belt conveyor |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140625 |
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| CX01 | Expiry of patent term |