CN114873194B - Continuous control method for steep angle lifting conveyer belt of feeding machine - Google Patents
Continuous control method for steep angle lifting conveyer belt of feeding machine Download PDFInfo
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- CN114873194B CN114873194B CN202210668534.6A CN202210668534A CN114873194B CN 114873194 B CN114873194 B CN 114873194B CN 202210668534 A CN202210668534 A CN 202210668534A CN 114873194 B CN114873194 B CN 114873194B
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- 238000000034 method Methods 0.000 title claims abstract description 24
- 239000000463 material Substances 0.000 claims abstract description 150
- 238000004519 manufacturing process Methods 0.000 claims abstract description 22
- 238000004260 weight control Methods 0.000 claims description 9
- 241000208125 Nicotiana Species 0.000 description 4
- 235000002637 Nicotiana tabacum Nutrition 0.000 description 4
- 230000001105 regulatory effect Effects 0.000 description 4
- 230000001276 controlling effect Effects 0.000 description 3
- 238000007599 discharging Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 235000019504 cigarettes Nutrition 0.000 description 2
- 125000004122 cyclic group Chemical group 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000001960 triggered effect Effects 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
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- 238000012795 verification Methods 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G43/00—Control devices, e.g. for safety, warning or fault-correcting
- B65G43/08—Control devices operated by article or material being fed, conveyed or discharged
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
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Abstract
The invention discloses a continuous control method of a steep-angle lifting conveyer belt of a feeding machine, which comprises the following steps: the steep angle lifting conveyer belt of the feeder starts to run, materials are conveyed to the quantitative pipe, and when the high material level photoelectric pipe of the quantitative pipe is shaded, the belt scale starts at full speed and enters a starting running state; the speed of the steep angle lifting conveyer belt of the feeder is controlled, and the three speed sections are operated in a circulating and reciprocating mode from the high speed operation to the medium speed operation to the low speed operation in the production starting stage; the belt conveyor device can be used for accurately matching the speed of the belt conveyor scale with the speed of the steep-angle lifting conveying belt, realizing stable operation of equipment, reducing the failure rate of parts and guaranteeing the quality stability of products.
Description
Technical Field
The invention relates to the technical field of smoke machine equipment, in particular to a continuous control method of a steep-angle lifting conveyer belt of a feeding machine.
Background
The feeder is a kind of cigarette machine equipment that cigarette factory is commonly used, as shown in fig. 1, and the feeder includes abrupt angle lifting conveyor 3 and belt weigher 1, is equipped with vertical quantitative pipe 2 between the top of abrupt angle lifting conveyor 3 and belt weigher 1, and quantitative pipe 2 is equipped with high material level photocell 2.3, well material level photocell 2.2 and low material level photocell 2.1 in proper order from top to bottom, and the effect of feeder is with tobacco material accurately, evenly feeding next process, through storing a certain amount of tobacco material, plays the effect of buffering and regulation between the process. The materials are conveyed to the quantitative pipe 2 through the steep angle lifting conveyor belt 3, the quantitative pipe 2 can control the material level according to signals of the high material level photoelectric pipe 2.3, the medium material level photoelectric pipe 2.2 and the low material level photoelectric pipe 2.1, firstly, the belt scale 1 is used for discharging, and secondly, the steep angle lifting conveyor belt 3 is used for feeding.
Discharging by the belt balance 1: the materials are evenly and smoothly discharged onto the belt balance 1 by the quantitative pipe 2, and the belt balance 1 is started by the signal delay trigger of the quantitative pipe 2 low-material-level photoelectric pipe 2.1 and the medium-material-level photoelectric pipe 2.2. The light is transmitted to the photoelectric tube 2.1 with low material level of the quantitative tube 2, and the belt balance 1 stops running after 300 seconds of delay; wherein, belt scale instantaneous flow (kg/h) =3600(s) ×basis weight on belt (kg) ×belt speed V (m/s). The material on the belt scale 1 is continuously changed due to the material density, the moisture and the continuous change of the unit weight, the actual instantaneous flow of the belt scale 1 is regulated according to the set instantaneous flow, and under the condition that the instantaneous flow of the belt scale 1 is unchanged, the speed of the belt scale 1 is changed due to the change of the material weight on the belt scale 1, and the material weight is inversely proportional to the speed of the belt scale 1. The change in belt scale speed affects the material blanking speed in the metering tube 2.
Feeding of the steep angle lifting conveyor belt 3: the shading signal of the material discharging photoelectric tube of the feeding machine box triggers the starting of the steep-angle lifting conveying belt 3 to convey materials to the quantitative tube 2. When the high material level photoelectric tube 2.3 of the quantitative tube 2 is shaded, the steep angle lifting conveyer belt 3 is triggered to stop running, when the high material level photoelectric tube 2.3 of the quantitative tube 2 is electrified, the steep angle lifting conveyer belt 3 is triggered to start again, the cyclic start-stop control of the steep angle lifting conveyer belt 3 is formed, when all photoelectric switches of the quantitative tube 2 and the feeding machine 3 are electrified, the steep angle lifting conveyer belt 3 is delayed for 300 seconds to stop running.
At present, in the production stage, when the quantitative pipe 2 is linked with the steep angle lifting conveyer belt 3, the steep angle lifting conveyer belt 3 conveys materials to the quantitative pipe 2 at a fixed frequency (fixed speed), and when the quantitative pipe 2 is full of materials, the steep angle lifting conveyer belt 3 stops running. Because of the change of the unit weight of the materials on the belt scale 1, in order to meet the requirement of stabilizing the instantaneous flow of the belt scale 1, the speed of the belt scale 1 is changed to be increased or decreased, when the speed of the belt scale 1 is changed in real time, the frequency of the steep-angle lifting conveying belt 3 is fixed and can not be followed, so that the steep-angle lifting conveying belt 3 is frequently started/stopped. When the steep angle lifting conveyer belt 3 is started or stopped to run with materials, the equipment running load is maximum, and frequent starting and stopping can greatly increase the load capacity of square steel and chains of equipment parts, so that the faults of breaking of the square steel and the chains during load starting, falling off of harrow nails and the like are caused, and the equipment of the steep angle lifting conveyer belt 3 is stopped abnormally, and the production abnormal condition affecting the product quality is frequent.
Disclosure of Invention
In order to solve the problems in the prior art, the invention aims to provide a continuous control method for a steep angle lifting conveyor belt of a feeding machine, which is used for accurately matching the speed of a belt scale with the speed of the steep angle lifting conveyor belt, realizing stable operation of equipment, reducing the failure rate of parts and ensuring the quality stability of products.
In order to achieve the above purpose, the invention adopts the following technical scheme: the continuous control method of the steep angle lifting conveyer belt of the feeding machine comprises the steep angle lifting conveyer belt and a belt scale, wherein a vertical quantitative pipe is arranged between the top end of the steep angle lifting conveyer belt and the belt scale, and a high material level photoelectric pipe, a medium material level photoelectric pipe and a low material level photoelectric pipe are sequentially arranged between the quantitative pipe from the top end to the bottom end, and the continuous control method comprises the following steps:
the steep angle lifting conveyer belt of the feeder starts to run, materials are conveyed to the quantitative pipe, and when the high material level photoelectric pipe of the quantitative pipe is shaded, the belt scale starts at full speed and enters a starting running state; when the material box of the feeding machine and the steep angle lifting conveyor belt are not provided with materials, and the high material level photoelectric tube, the middle material level photoelectric tube and the low material level photoelectric tube of the quantitative tube are all electrified, the program starts to delay, and after the delay time is finished, the belt scale enters a stop stage;
the speed of the steep angle lifting conveyer belt of the feeder is controlled, the high-speed operation is carried out from the production starting stage to the medium-speed stage to the low-speed stage, the three speed stages are carried out in a circulating and reciprocating mode, when the material does not exist on the material box and the steep angle lifting conveyer belt of the feeder and the high-material-level photoelectric tube, the medium-material-level photoelectric tube and the low-material-level photoelectric tube of the quantitative tube are all electrified, the steep angle lifting conveyer belt of the feeder is carried out at a high speed, the program starts to delay, and after the delay time is finished, the steep angle lifting conveyer belt of the feeder enters the stopping stage.
As a further improvement of the invention, after the belt scale enters a starting running state, the speed of the belt scale is regulated according to the unit weight of the materials on the belt scale until the production is finished.
As a further improvement of the present invention, the control of the speed of the steep angle lifting conveyor of the feeder specifically includes:
after the production of the steep angle lifting conveyer belt of the feeding machine is started, the high-speed section of the steep angle lifting conveyer belt of the feeding machine runs for a given buret to convey materials;
when the quantitative pipe low-material-level photoelectric pipe is shielded, the steep angle of the feeding machine lifts the middle speed section of the conveyer belt to operate;
when the quantitative pipe low-material-level photoelectric pipe and the middle-material-level photoelectric pipe are shielded, the feeder is operated at a steep angle to lift the low-speed section of the conveying belt;
when the low material level photoelectric tube, the middle material level photoelectric tube and the high material level photoelectric tube of the quantitative tube are shielded, the steep angle lifting conveyer belt of the feeding machine stops running.
As a further improvement of the invention, the speed of each section of the steep angle lifting conveyer belt of the feeding machine is controlled according to the instantaneous flow of the belt scale, and the speed is specifically as follows:
instantaneous flow Q of belt scale 1 ＝3600*q 1 *v 1 (kg/h), where q 1 The weight of the material in unit length of the belt scale is kg/m, v 1 The belt speed of the belt scale is m/s;
instantaneous flow Q of steep-angle lifting conveyor belt 2 ＝3600*q 2 *v 2 (kg/h), where q 2 The weight of the material in unit length of the steep angle lifting conveyor belt is kg/m, v 2 The belt speed of the conveyor belt is lifted to a steep angle, and the unit is m/s;
because the belt of belt weigher and abrupt angle lifting conveyor is controlled by the converter, with the speed of 1 belt of belt weigher 1 unit length material weight and belt weigher, and the speed of 1 belt of abrupt angle lifting conveyor 1 unit length material weight and abrupt angle lifting conveyor 1 converts into frequency Hz unit, namely:
instantaneous flow Q of belt scale 1 * ＝3600*q 1 * *v 1 * Wherein q 1 * Is a belt scale 1The weight of the material in unit length is kg/Hz, v 1 * The belt speed is 1 belt speed of the belt scale, and the unit is Hz/s;
instantaneous flow Q of steep-angle lifting conveyor belt 2 * ＝3600*q 2 * *v 2 * Wherein q 2 * The weight of the material in the unit length of the steep angle lifting conveyor belt is 1, and the unit is kg/Hz, v 2 * The belt speed of the conveyor belt is lifted for a steep angle, and the unit is Hz/s;
when Q is 1 * ＝Q 2 * During the time, realize the continuous operation of abrupt angle lifting conveyor, namely:
3600*q 1 * *v 1 * ＝3600*q 2 * *v 2 *
thereby, can obtain:
v 2 * ＝v 1 * * Beta, where beta is a weight control coefficient, beta=q 1 * /q 2 * ；
The weight control coefficient is adjusted by adjusting the frequency of the frequency converter, so that the belt scale is associated with the belt speed of the steep angle lifting conveyor belt, and the purpose of continuously controlling the steep angle lifting conveyor belt of the feeding machine is achieved.
The beneficial effects of the invention are as follows:
according to the invention, the smooth operation of the steep angle lifting conveyer belt is realized through the associated automatic control of the belt scale speed and the steep angle lifting conveyer belt speed, so that the start and stop times of the steep angle lifting conveyer belt are obviously reduced; in the production process, the start and stop times of the steep angle lifting conveyer belt are reduced from 30 times/h to 0 times/h, and continuous operation of the steep angle lifting conveyer belt is realized.
Drawings
FIG. 1 is a schematic diagram of a feeder.
Reference numerals:
1. the belt conveyor comprises a belt scale, 2 parts of quantitative pipes, 2.1 parts of low-material-level photoelectric pipes, 2.2 parts of medium-material-level photoelectric pipes, 2.3 parts of high-material-level photoelectric pipes and 3 parts of steep-angle lifting conveying belts.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
Examples
The utility model provides a continuous control method of abrupt angle lifting conveyor belt of feeding machine, as shown in fig. 1, the feeding machine includes abrupt angle lifting conveyor belt and belt weigher, be equipped with vertical quantitative pipe between the top of abrupt angle lifting conveyor belt and the belt weigher, quantitative pipe is equipped with high material level photocell, well material level photocell and low material level photocell from top to bottom in proper order, continuous control method include:
1. program control of the belt scale 1:
the belt scale 1 is controlled from a stop stage to a running stage to a stop stage:
and in the stopping stage, when the belt scale 1 sets the instantaneous flow kg/h of the material, the steep-angle lifting conveyer belt of the feeding machine starts to operate, and the material is conveyed to the quantitative pipe 2. The low-level photocell 2.1 of the quantitative tube 2 is firstly shielded by materials, the material level photocell 2.2 in the subsequent material shielding is shielded by materials, the material shielding is carried out on the high-level photocell 2.3, (a material-carrying signal is given), at the moment, the fact that enough materials in the quantitative tube 2 meet the high speed when the belt scale 1 is started (when no material unit exists on the belt scale 1, the requirement of instantaneous flow is met (the material-carrying signal is given), at the moment, the belt scale 1 is started at the moment, the belt scale 1 meets the instantaneous flow when the unit weight exists on the belt scale 1, the belt scale speed is reduced, the belt scale speed is regulated according to the unit weight of the materials on the belt scale 1, and the belt scale speed is regulated until the production is finished.
Program control of a steep angle lifting conveyer belt 3 of a feeding machine:
a control process of the cyclic reciprocating operation of the three speed sections of the feeding machine steep angle lifting conveyer belt 3 from the high speed section to the middle speed section to the low speed section to the stop stage in the production start stage; after the production of the steep angle lifting conveyer belt 3 of the feeding machine is started, the steep angle lifting conveyer belt 3 of the feeding machine conveys materials at a high speed given burette 2.
When the low-material-level photoelectric tube 2.1 of the quantitative tube 2 is shielded by materials, the steep-angle lifting conveyer belt 3 of the feeding machine runs at a medium speed section;
when the quantitative pipe 2 has a low material level photoelectric pipe 2.1 and a medium material level photoelectric pipe 2.2 are blocked by materials, the feeder operates at a low speed section of the steep angle lifting conveyer belt 3;
when the low material level photoelectric tube 2.1, the medium material level photoelectric tube 2.2 and the high material level photoelectric tube 2.3 of the quantitative tube 2 are blocked by materials, the operation of the feeding machine steep angle lifting conveying belt 3 is stopped.
When the material of the metering tube 2 continuously falls, the material reaches the high-material-level photoelectric tube 2.3 and the medium-material-level photoelectric tube 2.2, and no material is continuously led to light, and then the steep-angle lifting conveyer belt 3 of the feeding machine runs at a medium speed again. And (5) circulating until the production is finished.
When no material is arranged on the feeder bin and the steep angle lifting conveyor belt 3, the three material level photoelectric tubes of the quantitative tube 2 do not shade the material, the feeder steep angle lifting conveyor belt 3 runs at a high speed, the program starts to delay, and when the delay time is over, the feeder steep angle lifting conveyor belt 3 enters a stop stage.
2. And (3) controlling the speed of the steep angle lifting conveyer belt 3 of the feeding machine:
the continuous control principle of the speed of the steep angle lifting conveyer belt 3 of the feeding machine:
instantaneous flow Q of belt scale 1 ＝3600*q 1 *v 1 (kg/h), where q 1 The weight of the material in unit length of the belt scale is kg/m, v 1 The belt speed of the belt scale is m/s;
instantaneous flow Q of steep-angle lifting conveyor belt 2 ＝3600*q 2 *v 2 (kg/h), where q 2 The weight of the material in unit length of the steep angle lifting conveyor belt is kg/m, v 2 The belt speed of the conveyor belt is lifted to a steep angle, and the unit is m/s;
because the belt of belt weigher and abrupt angle lifting conveyor is controlled by the converter, with the speed of 1 belt of belt weigher 1 unit length material weight and belt weigher, and the speed of 1 belt of abrupt angle lifting conveyor 1 unit length material weight and abrupt angle lifting conveyor 1 converts into frequency Hz unit, namely:
instantaneous flow Q of belt scale 1 * ＝3600*q 1 * *v 1 * Wherein q 1 * The weight of the material in unit length of the belt scale 1 is kg/Hz, v 1 * The belt speed is 1 belt speed of the belt scale, and the unit is Hz/s;
instantaneous flow Q of steep-angle lifting conveyor belt 2 * ＝3600*q 2 * *v 2 * Wherein q 2 * The weight of the material in the unit length of the steep angle lifting conveyor belt is 1, and the unit is kg/Hz, v 2 * The belt speed of the conveyor belt is lifted for a steep angle, and the unit is Hz/s;
when Q is 1 * ＝Q 2 * During the time, realize the continuous operation of abrupt angle lifting conveyor, namely:
3600*q 1 * *v 1 * ＝3600*q 2 * *v 2 *
thereby, can obtain:
v 2 * ＝v 1 * * Beta, where beta is a weight control coefficient, beta=q 1 * /q 2 * ；
Adjusting the weight control coefficient by adjusting the frequency of the frequency converter, v 1 * When the change occurs, v 2 * Can correspondingly adjust to meet the material requirement of the belt scale 1, and further correlate the belt speed of the belt scale and the belt speed of the steep angle lifting conveyer belt, thereby achieving the purpose of continuously controlling the steep angle lifting conveyer belt of the feeder.
The design principle of a speed continuous operation program of the steep angle lifting conveyer belt 3 of the feeding machine in production operation is as follows:
in the operation process of the feeder steep angle lifting conveyer belt 3, as the weight and the volume of the unit material are changed due to the change of the density and the moisture of the material, two weight control coefficients, namely a low-speed section weight control coefficient and a medium-speed section weight control coefficient, are designed according to the actual condition of the site, so that the shortage of the material of the metering tube 2 is ensured, the feeder steep angle lifting conveyer belt 3 is accelerated, the feeder steep angle lifting conveyer belt 3 is operated at the medium-speed section, the material of the metering tube 2 is high, the feeder steep angle lifting conveyer belt 3 is decelerated, the operation at the low-speed section is ensured, the material level of the quantitative 2 tube is ensured, and the material requirement required by the belt scale 1 is met.
(1) In the production stage of the belt scale 1, a material shading is arranged on a low material level photoelectric tube 2.1 of the metering tube 2, when no material is transmitted to the medium material level photoelectric tube 2.2, the speed control of the steep angle lifting conveyor belt 3 enters the speed control of the medium speed section, and the speed (Hz) of the steep angle lifting conveyor belt is=the belt speed (Hz) of the belt scale 1, which is the weight coefficient 1;
(2) When the material shading is carried out on the material low-material-level photoelectric tube 2.1 of the metering tube 2 and the material shading is carried out on the material medium-material-level photoelectric tube 2.2, the speed control of the steep-angle lifting conveyor belt 3 enters the speed control of the low-speed section, and the speed (Hz) of the steep-angle lifting conveyor belt is=the belt speed (Hz) of the belt scale cover 1;
speed coefficient 1 > speed coefficient 2, namely: the material level in the material limiting pipe is communicated with light to realize medium-speed section operation, and the light shielding to realize low-speed section operation.
(3) In the production starting stage, as no material is arranged on the belt of the belt scale 1, the running frequency of the belt scale is 50Hz, when the material in the metering tube 2 is in the middle position, the speed of the belt scale 1 can be calculated through a formula, and the frequency of the steep angle lifting conveyer belt 3 is far higher than the maximum frequency (maximum 50 Hz) set by the steep angle lifting conveyer belt, so that the material required by the belt scale 1 is conveyed, and the belt scale 1 is frequently started and stopped in the starting stage, so that the highest speed of the steep angle lifting conveyer belt 3 in the low speed section and the medium speed section is controlled in a limiting mode.
(4) The weight coefficient 1 of the (middle speed section) and the weight coefficient 2 of the (low speed section) are debugged according to the start and stop times of the steep angle lifting conveyer belt 3, the steep angle lifting conveyer belt is stably operated through the associated automatic control of the speed of the belt scale 1 and the speed of the steep angle lifting conveyer belt 3, and the start and stop times of the steep angle lifting conveyer belt 3 are obviously reduced.
And (3) experimental verification:
the continuous operation control method of the steep angle lifting conveyer belt 3 of the feeding machine is implemented in a Chengdu tobacco factory, and a thread-wetting feeding production section in a tobacco shred recycling production line is implemented in a specific embodiment by program design, and the adjustment and setting of speed control parameters (high-speed frequency, medium-speed section weight coefficient and low-speed section weight coefficient) of the steep angle lifting conveyer belt 3 are realized. Gradually reducing the start and stop times of the steep angle lifting conveyer belt 3.
(1) The original control method comprises the following steps:
the frequency of the high-speed section of the steep angle lifting conveyor belt 3 is 25Hz, the low speed (frequency) is 20Hz, and the steep angle lifting conveyor belt 3 is started and stopped 30 times/h.
(2) The control method of the invention is applied to case 1:
the high-speed frequency of the steep angle lifting conveyor belt 3 is 20Hz, the weight coefficient of the middle speed section is 3.1, the weight coefficient of the low speed section is 3.0, and the steep angle lifting conveyor belt 3 is started and stopped 15 times/h.
(3) The control method of the invention is applied to case 2:
the high-speed frequency of the steep angle lifting conveyor belt 3 is 19Hz, the weight coefficient of the middle speed section is 3.1, the weight coefficient of the low speed section is 2.9, and the steep angle lifting conveyor belt 3 is started and stopped 7 times/h.
(4) The control method of the invention is applied to case 3:
the high-speed frequency of the steep angle lifting conveyor belt 3 is 18.25Hz, the weight coefficient of the middle speed section is 3.15, the weight coefficient of the low speed section is 2.8, and the steep angle lifting conveyor belt 3 is started and stopped for 1 time/h.
(5) Application case 4 of the control method of the invention:
the high-speed frequency of the steep angle lifting conveyor belt 3 is 18.5Hz, the weight coefficient of the middle speed section is 3.2, the weight coefficient of the low speed section is 2.8, and the steep angle lifting conveyor belt 3 is started and stopped 0 times/h.
The parameters of the highest speed of the steep angle lifting conveyor belt 3, the weight coefficient a of the steep angle lifting conveyor belt 3 and the weight coefficient b of the steep angle lifting conveyor belt are adjusted as follows:
(6) The limit setting is performed at the highest speeds of the low speed section and the medium speed section.
In the production start and production end stages of the belt scale 1, as no material is arranged on the belt scale 1, the belt scale runs at the speed of 50Hz, the frequency which is set by the belt scale is calculated to be more than the 50Hz according to the speed formula of the steep angle lifting conveyer belt 3, and the steep angle lifting conveyer belt 3 runs at the frequency of 50Hz, so that the material conveying capacity required by the belt scale is greatly exceeded, and the steep angle lifting conveyer belt 3 is frequently started and stopped. Therefore, the maximum conveying speed of the steep angle lifting conveyor 3 needs to be limited.
The speed frequency of the belt scale 1 is changed at about (4.5-5.6) Hz during normal operation, and the corresponding speed frequency of the steep angle lifting conveyer belt 3 is (14.4-17.92) Hz, so that the maximum frequency of the steep angle lifting conveyer belt 3 is set to 18.5Hz, and the maximum frequency is used as the high-speed operation speed of the steep angle lifting conveyer belt 3.
The belt scale 1 and the feeder steep angle lifting conveyer belt 3 are controlled to run continuously by adjusting the highest speed of the steep angle lifting conveyer belt 3, the weight coefficient a of the steep angle lifting conveyer belt 3, the weight coefficient b of the steep angle lifting conveyer belt and setting the high-speed running frequency of the steep angle lifting conveyer belt 3. The start and stop times of the steep angle lifting conveyor belt 3 in the production process are reduced from 30 times/h to 0 times/h. Realizing continuous operation of the steep angle lifting conveyer belt 3 of the feeder.
The foregoing examples merely illustrate specific embodiments of the invention, which are described in greater detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention.
Claims (3)
1. The continuous control method of the steep angle lifting conveyer belt of the feeding machine comprises the steep angle lifting conveyer belt and a belt scale, wherein a vertical quantitative pipe is arranged between the top end of the steep angle lifting conveyer belt and the belt scale, and a high material level photoelectric pipe, a medium material level photoelectric pipe and a low material level photoelectric pipe are sequentially arranged between the quantitative pipe from the top end to the bottom end, and the continuous control method is characterized by comprising the following steps:
the steep angle lifting conveyer belt of the feeder starts to run, materials are conveyed to the quantitative pipe, and when the high material level photoelectric pipe of the quantitative pipe is shaded, the belt scale starts at full speed and enters a starting running state; when the material box of the feeding machine and the steep angle lifting conveyor belt are not provided with materials, and the high material level photoelectric tube, the middle material level photoelectric tube and the low material level photoelectric tube of the quantitative tube are all electrified, the program starts to delay, and after the delay time is finished, the belt scale enters a stop stage;
the speed of the steep angle lifting conveyer belt of the feeder is controlled, the three speed sections are operated in a circulating and reciprocating mode from the high speed operation to the medium speed operation to the low speed operation in the production starting stage, when the material box of the feeder, the high material level photoelectric tube, the medium material level photoelectric tube and the low material level photoelectric tube of the quantitative tube are all electrified, the steep angle lifting conveyer belt of the feeder operates at a high speed, the program starts to delay, and after the delay time is finished, the steep angle lifting conveyer belt of the feeder enters the stopping stage;
the speed of each section of the steep-angle lifting conveyer belt of the feeding machine is controlled according to the instantaneous flow of the belt scale, and the method specifically comprises the following steps:
instantaneous flow Q of belt scale 1 ＝3600*q 1 *v 1 (kg/h), where q 1 The weight of the material in unit length of the belt scale is kg/m, v 1 The belt speed of the belt scale is m/s;
instantaneous flow Q of steep-angle lifting conveyor belt 2 ＝3600*q 2 *v 2 (kg/h), where q 2 The weight of the material in unit length of the steep angle lifting conveyor belt is kg/m, v 2 The belt speed of the conveyor belt is lifted to a steep angle, and the unit is m/s;
because the belt of belt weigher and abrupt angle lifting conveyor is controlled by the converter, with the speed of 1 belt of belt weigher 1 unit length material weight and belt weigher, and the speed of 1 belt of abrupt angle lifting conveyor 1 unit length material weight and abrupt angle lifting conveyor 1 converts into frequency Hz unit, namely:
instantaneous flow Q of belt scale 1 * ＝3600*q 1 * *v 1 * Wherein q 1 * The weight of the material in unit length of the belt scale 1 is kg/Hz, v 1 * The belt speed is 1 belt speed of the belt scale, and the unit is Hz/s;
instantaneous flow Q of steep-angle lifting conveyor belt 2 * ＝3600*q 2 * *v 2 * Wherein q 2 * The weight of the material in the unit length of the steep angle lifting conveyor belt is 1, and the unit is kg/Hz, v 2 * The belt speed of the conveyor belt is lifted for a steep angle, and the unit is Hz/s;
when Q is 1 * ＝Q 2 * During the time, realize the continuous operation of abrupt angle lifting conveyor, namely:
3600*q 1 * *v 1 * ＝3600*q 2 * *v 2 *
thereby, can obtain:
v 2 * ＝v 1 * * Beta, where beta is a weight control coefficient, beta=q 1 * /q 2 * ；
The weight control coefficient is adjusted by adjusting the frequency of the frequency converter, so that the belt scale is associated with the belt speed of the steep angle lifting conveyor belt, and the purpose of continuously controlling the steep angle lifting conveyor belt of the feeding machine is achieved.
2. The continuous control method for a steep-angle lifting conveyor belt of a feeder according to claim 1, wherein after the belt scale is put into a start-up operation state, the speed of the belt scale is adjusted according to the unit weight of the material on the belt scale until the end of production.
3. The continuous control method of a steep angle lift conveyor of a feeder according to claim 1, wherein controlling the speed of the steep angle lift conveyor of the feeder specifically comprises:
after the production of the steep angle lifting conveyer belt of the feeding machine is started, the high-speed section of the steep angle lifting conveyer belt of the feeding machine runs for a given buret to convey materials;
when the quantitative pipe low-material-level photoelectric pipe is shielded, the steep angle of the feeding machine lifts the middle speed section of the conveyer belt to operate;
when the quantitative pipe low-material-level photoelectric pipe and the middle-material-level photoelectric pipe are shielded, the feeder is operated at a steep angle to lift the low-speed section of the conveying belt;
when the low material level photoelectric tube, the middle material level photoelectric tube and the high material level photoelectric tube of the quantitative tube are shielded, the steep angle lifting conveyer belt of the feeding machine stops running.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3968904A (en) * | 1974-03-12 | 1976-07-13 | Amf Incorporated | Continuous measurement of the bulk density of particulate material |
| JPS63108232A (en) * | 1986-10-24 | 1988-05-13 | Kawasaki Steel Corp | Fixed quantity feeding device for granule |
| CN101476924A (en) * | 2008-12-30 | 2009-07-08 | 上海烟草（集团）公司 | Feeding machine hoisting belt speed control method and materiel delivery system |
| CN201458290U (en) * | 2009-08-05 | 2010-05-12 | 红塔烟草（集团）有限责任公司大理卷烟厂 | Multilevel quantitative feeding system |
| CN101846540A (en) * | 2010-04-08 | 2010-09-29 | 上海烟草（集团）公司 | Method for controlling speed of elevating belt of feeder and material conveying system |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3968904A (en) * | 1974-03-12 | 1976-07-13 | Amf Incorporated | Continuous measurement of the bulk density of particulate material |
| JPS63108232A (en) * | 1986-10-24 | 1988-05-13 | Kawasaki Steel Corp | Fixed quantity feeding device for granule |
| CN101476924A (en) * | 2008-12-30 | 2009-07-08 | 上海烟草（集团）公司 | Feeding machine hoisting belt speed control method and materiel delivery system |
| CN201458290U (en) * | 2009-08-05 | 2010-05-12 | 红塔烟草（集团）有限责任公司大理卷烟厂 | Multilevel quantitative feeding system |
| CN101846540A (en) * | 2010-04-08 | 2010-09-29 | 上海烟草（集团）公司 | Method for controlling speed of elevating belt of feeder and material conveying system |
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| CN114873194A (en) | 2022-08-09 |
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